CN112901889A

CN112901889A - Pipeline support vibration damping device and method and engineering machinery

Info

Publication number: CN112901889A
Application number: CN202110112922.1A
Authority: CN
Inventors: 卢照昕; 吴亮; 尹君
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-06-04
Anticipated expiration: 2041-01-27
Also published as: CN112901889B

Abstract

The invention relates to the field of engineering machinery, and discloses a pipeline supporting and damping device, a pipeline supporting and damping method and engineering machinery, wherein the pipeline supporting and damping device comprises a connecting piece (10) used for being connected with a pipeline, a moving unit (20) used for moving the connecting piece (10), a detection unit (40) used for detecting the movement of the pipeline, and a control unit electrically connected with the detection unit (40), wherein the control unit is arranged to control the operation of the moving unit according to the detection of the detection unit (40) so as to restrain the movement of the pipeline caused by fluid impact in the pipeline.

Description

Pipeline support vibration damping device and method and engineering machinery

Technical Field

The invention relates to the field of engineering machinery, in particular to a pipeline supporting vibration damping device and a method.

Background

Work machines typically have a fluid delivery conduit and a support structure (e.g., boom) coupled to the fluid delivery conduit, and the fluid impacts the fluid delivery conduit when the fluid is delivered through the fluid delivery conduit. The impact is usually in an irregular state due to the fluidity of fluid and the like, so that the conveying pipeline and the arm support connected with the conveying pipeline generate corresponding irregular vibration, when the vibration is close to the natural frequency of the arm support system, resonance is generated, the structural instability and the failure of the arm support system are caused, the arm support is cracked or broken, and serious accidents are caused. Therefore, there is a need in the art to mitigate vibration caused by fluid impact on the delivery conduit.

Disclosure of Invention

The invention aims to overcome the safety problem caused by the impact of fluid on a conveying pipeline in the prior art, and provides a pipeline supporting and damping device which can relieve the vibration generated by the impact of the fluid on the conveying pipeline.

In order to achieve the above object, an aspect of the present invention provides a pipe supporting vibration damping device, wherein the pipe supporting vibration damping device includes a connection member for connection with a pipe, a moving unit for moving the connection member, a detection unit for detecting movement of the pipe, and a control unit electrically connected to the detection unit, the control unit being configured to control an operation of the moving unit according to the detection of the detection unit to suppress movement of the pipe caused by fluid impact within the pipe.

Optionally, the connecting member comprises a first connecting portion and a second connecting portion, the moving unit comprises a first moving unit and a second moving unit, the pipeline supporting and vibration damping device also comprises a fixing piece used for connecting and fixing the foundation, the first connecting part is used for connecting the pipeline, the first moving unit includes a first housing connected to the second connecting portion and a first moving mechanism mounted to the first housing to move the first connecting portion in a first direction, the second moving unit includes a second housing connected to the fixing member and a second moving mechanism mounted to the second housing to move the second connecting portion in a second direction, the first direction and the second direction are different directions, and the control unit is configured to control operations of the first moving mechanism and the second moving mechanism to suppress components of movement of the pipe in the first direction and the second direction caused by the fluid impact.

Optionally, the first moving mechanism and the second moving mechanism are both electromagnetic moving mechanisms, each electromagnetic moving mechanism includes magnets arranged opposite to each other and a magnetic moving block capable of moving between the magnets by magnetic force, the magnets and/or the moving block are electromagnets, the moving block is connected to the corresponding first connecting portion or the second connecting portion, and the control unit is configured to control an energization state of the electromagnets.

Optionally, the electromagnetic moving mechanism includes a connecting rod connected between the magnets, and the moving block is slidably sleeved on the connecting rod.

Optionally, a buffer spring is disposed between the moving block and the magnet.

Optionally, the first housing and/or the second housing include a box body with an opening and a cover body covering the box body, and the cover body is provided with a long hole allowing the corresponding first connecting portion and/or the second connecting portion to move.

Optionally, the first connecting portion and the second connecting portion are rod-shaped members perpendicular to the first direction and the second direction.

Optionally, a load platform for connecting the pipeline is arranged at the tail end of the first connecting portion, and the detection unit is mounted on the load platform.

The application also provides engineering machinery, wherein the engineering machinery comprises an arm support, a pipeline and the pipeline supporting vibration damper, the connecting piece is connected to the pipeline, and the moving unit uses the arm support as a reference to provide movement.

The application also provides a pipeline supporting vibration reduction method, wherein the pipeline supporting vibration reduction method comprises the following steps:

s1, detecting the initial movement of the pipeline;

and S2, reversely moving the pipeline according to the detection result to restrain the initial movement of the pipeline.

Optionally, step S2 includes: s21, decomposing the initial movement into a first component along a first direction and a second component along a second direction, wherein the first direction is different from the second direction; s22, respectively moving the pipeline along the first direction and the second direction by a third component and a fourth component along the direction opposite to the first component and the second component, wherein the magnitude of the first component is the same as that of the third component, and the magnitude of the second component is the same as that of the fourth component.

Optionally, the method uses the pipe support vibration damping device of the present application, the method comprising: after the control unit controls the mobile unit to maintain the movement operation of the preset time, the control unit controls the operation movement of the mobile unit according to the detection result of the detection unit; and, the movement of the pipe is continuously detected by the detecting unit.

By the technical scheme, the movement of the pipeline caused by the vibration generated by the fluid impact is detected, and the corresponding reverse movement is provided for the pipeline through the moving unit according to the movement, so that the actual movement caused by the vibration is reduced, namely the vibration generated by the fluid impact is restrained.

Drawings

FIG. 1 is a schematic structural view of a pipe support damper apparatus according to an embodiment of the present application;

FIG. 2 is a top view of the cover of the first housing of FIG. 1;

FIG. 3 is a flow chart illustrating the pipe support damping method of the present application.

Description of the reference numerals

10. A connecting member; 11. a first connection portion; 111. a load platform; 12. a second connecting portion; 20. a mobile unit; 21. a first mobile unit; 211. a first housing; 22. a second mobile unit; 221. a second housing; 23. an electromagnetic moving mechanism; 231. a magnet; 232. a moving block; 232a, a coil; 233. a connecting rod; 234. a buffer spring; 235. a limiting member; 24. a box body; 25. a cover body; 251. a long hole; 30. a fixing member; 40. a detection unit; 50. and an arm frame connecting piece.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to an aspect of the present application, there is provided a pipe supporting vibration damping device, wherein the pipe supporting vibration damping device includes a connection member 10 for connection with a pipe, a moving unit 20 for moving the connection member 10, a detecting unit 40 for detecting movement of the pipe, and a control unit electrically connected to the detecting unit 40, the control unit being configured to control an operation of the moving unit according to detection of the detecting unit 40 to suppress movement of the pipe caused by fluid impact within the pipe.

With the pipe support vibration damping apparatus of the present application, the movement of the pipe due to the vibration generated by the fluid impact is detected by the detection unit 40, and the movement unit 20 is controlled by the control unit to provide a corresponding reverse movement to the pipe according to the movement, thereby reducing the actual movement due to the vibration, i.e., suppressing the vibration generated by the fluid impact.

Among them, the moving unit 20 may be provided in various suitable forms to provide a reverse movement to the pipe according to the movement of the pipe by vibration generated by fluid impact. Due to the irregularity of the fluid impact, the vibration of the pipe due to the impact may also be in all directions of the cross-section of the pipe. In order to facilitate the provision of the opposite movements by the moving unit 20, the control unit may decompose the movements detected by the detecting unit 40 into two directional components that are not parallel to each other across the cross-section of the pipe, and subsequently may suppress vibrations generated by fluid shocks by providing movements opposite to said components in the two directions. That is, it is possible to provide a compound direction counter-movement in any direction across the cross-section of the pipe by providing counter-movements in specific two directions.

To this end, as shown in fig. 1, the connection member 10 may include a first connection portion 11 and a second connection portion 12, the moving unit 20 includes a first moving unit 21 and a second moving unit 22, the pipe support vibration damping device further includes a fixing member 30 for connecting a fixed base (e.g., connected to the boom through a boom connection member 50), the first connection portion 11 is used to connect a pipe, the first moving unit 21 includes a first housing 211 connected to the second connection portion 12 and a first moving mechanism mounted to the first housing 211 to move the first connection portion 11 in a first direction, the second moving unit 22 includes a second housing 221 connected to the fixing member 30 and a second moving mechanism mounted to the second housing 221 to move the second connection portion 12 in a second direction, the first direction and the second direction are different directions, the control unit is configured to control the operation of the first and second movement mechanisms to suppress components of movement of the conduit in the first and second directions caused by the fluid impact.

The first direction and the second direction are directions parallel to the cross section of the pipeline, and the first direction and the second direction are different directions, which means that the projections of the first direction and the second direction on the cross section of the pipeline are not parallel or coincident. With reference to the fixed base, the first connection portion 11 (carrying the pipe) can be moved in a first direction by the first moving unit 21, and the second connection portion 12 (carrying the first moving unit 21, the first connection portion 11, the pipe) can be moved in a second direction by the second moving unit 22, so that components of the movement of the pipe in the first and second directions caused by the fluid impact are suppressed.

The first moving mechanism and the second moving mechanism may be provided in various suitable manners, such as by an air cylinder, an electric push rod, and the like. Since the fluid impact is irregular, the operation of the first and second movement mechanisms is preferably capable of being triggered instantaneously and maintained as needed for a desired time in order to facilitate suppression based on the instantaneous conditions of the impact.

Therefore, preferably, the first moving mechanism and the second moving mechanism are both electromagnetic moving mechanisms 23, each electromagnetic moving mechanism 23 includes magnets 231 arranged opposite to each other and a magnetic moving block 232 capable of moving between the magnets 231 by magnetic force, the magnets 231 and/or the moving block 232 are electromagnets, the moving block 232 is connected to the corresponding first connecting portion 11 or second connecting portion 12, and the control unit is configured to control the energization state of the electromagnets.

Wherein, according to the feedback result of the detecting unit 40, the vibration size and the maintaining time generated by the impact can be determined, and the control unit can control the power-on state (including the current size, the direction and the duration) of the electromagnet according to the feedback so as to provide the reverse movement according to the current impact. Specifically, when the electromagnet is powered, the moving block 232 can move under the action of the magnets 231 on the two sides to drive the first connecting portion 11 or the second connecting portion 12 to move in the first direction or the second direction.

The magnets 231 may be mounted to the corresponding first or second housing to cause movement of the moving block 232 relative to the first or second housing when the electromagnets are energized. More specifically, the magnets 231 may be disposed to be opposite to each other with the same polarity, so that when the moving block 232 moves, one magnet 231 provides an attractive force to the moving block 232 and the other magnet 231 provides a repulsive force to the moving block 232.

In addition, as described above, the magnet 231 and/or the moving block 232 are electromagnets. This includes the case where both the magnet 231 and the moving block 232 are electromagnets and the magnet 231 or the moving block 232 are electromagnets. Preferably, the magnet 231 may be provided as a permanent magnet, and the moving block 232 may be provided as an electromagnet. Specifically, as shown in fig. 1, the moving block 232 includes a block and a coil 232a disposed around the block, and an axial direction of the coil 232a is an arrangement direction of the two magnets 231. That is, in the first moving mechanism, the two magnets 231 are disposed opposite to each other in the first direction, and the axial direction of the coil 232a is disposed in the first direction; in the second moving mechanism, the two magnets 231 are disposed oppositely in the second direction, and the axial direction of the coil 232a is disposed in the second direction.

To ensure that the moving block 232 moves along the corresponding first direction or second direction, the electromagnetic moving mechanism 230 may include a connecting rod 233 connected between the magnets 231, and the moving block 232 is slidably sleeved on the connecting rod 233. Wherein the connecting rod 233 is disposed along a corresponding first direction or second direction to guide the movement of the moving block 232.

Further, in order that the moving block 232 can return to a set initial position after the magnetic force is removed so as to operate with reference to a predetermined origin (initial position) according to a subsequent detection, it is preferable that a buffer spring 234 is provided between the moving block 232 and the magnet 231. In addition, in order to prevent the buffer spring 234 from being damaged due to excessive instantaneous deformation, a stopper 235 may be fixed to the moving block connecting rod 233 to restrict the deformation of the buffer spring 234. Specifically, the limiting member 235 may be a limiting pin, and after the buffer spring 234 is mounted on the connecting rod 233, the limiting pin may be inserted into a pin hole preset on the connecting rod 233, so that the limiting pin can be located between two adjacent turns of the buffer spring 234 at a proper position (e.g., the middle portion).

For the convenience of maintenance and preservation of the electromagnetic moving mechanism 230, the first and second housings 211 and 221 may be provided in the form of detachable closed housings. Specifically, the first housing 211 and/or the second housing 221 may include a box body 24 having an opening and a cover body 25 covering the box body 24, and the cover body 25 is provided with a long hole 251 allowing the corresponding first connecting portion 11 and/or the second connecting portion 12 to move. The long hole 251 can allow the first connecting portion 11 or the second connecting portion 12 to move in the first direction or the second direction, and can prevent the moving block 232 from rotating relative to the connecting rod 233 when moving along the connecting rod 233.

In addition, the first connecting portion 11 and the second connecting portion 12 may be in various suitable forms, and in order to stably transmit the force and the movement, the first connecting portion 11 and the second connecting portion 12 are rod-shaped members perpendicular to the first direction and the second direction. That is, the first connection portion 11 and the second connection portion 12 are rod-shaped members perpendicular to the cross section of the pipe.

In order to facilitate the connection of the first connection portion 11 to the pipe, the end of the first connection portion 11 may be provided with a load platform 111 for connecting the pipe, and the sensing unit 40 may be mounted to the load platform 111. The detection unit 40 may include various suitable detection elements, for example, a displacement sensor, a pressure sensor, an inclination sensor, a speed sensor, an acceleration sensor, and the like.

According to another aspect of the present application, a construction machine is provided, wherein the construction machine includes an arm support, a pipe, and the pipe support vibration damping device of the present application, the connecting member is connected to the pipe, and the moving unit 20 provides movement with the arm support as a reference.

The movement of the pipe due to the vibration caused by the fluid impact is detected by the detection unit 40 and the control unit controls the movement unit 20 to provide a corresponding counter movement to the pipe in accordance with the movement, thereby reducing the actual movement of the pipe relative to the boom due to the vibration, i.e. damping the vibration caused by the fluid impact.

According to another aspect of the present application, there is provided a pipe support vibration damping method, wherein the pipe support vibration damping method includes:

s1, detecting the initial movement of the pipeline;

In the method of the present application, by moving the pipe in the opposite direction, the actual amount of movement of the pipe can be reduced, thereby suppressing vibration caused by fluid impact.

Due to the irregularity of the fluid impact, the vibration of the pipe due to the impact may also be in all directions of the cross-section of the pipe. To facilitate the provision of the opposite movements, the detected initial movements may be decomposed into two directional components which are not parallel to each other across the cross-section of the conduit, and the vibrations generated by the fluid impact may then be damped by providing movements in the two directions opposite to said components. That is, any direction of movement in the cross-section of the conduit can be combined by providing movement in two specific directions.

Specifically, step S2 includes: s21, decomposing the initial movement into a first component along a first direction and a second component along a second direction, wherein the first direction is different from the second direction; s22, respectively moving the pipeline along the first direction and the second direction by a third component and a fourth component along the direction opposite to the first component and the second component, wherein the magnitude of the first component is the same as that of the third component, and the magnitude of the second component is the same as that of the fourth component.

The method of the present application may be implemented in various suitable ways, for example, the pipe-supported vibration damping device of the present application may be used, since fluid shocks are irregular, and in order to facilitate suppression based on transient conditions of the shock, it is preferable to be able to provide a reverse movement for a desired time based on the condition of the shock and a corresponding reverse movement in real time based on continuous detection. Preferably, the method comprises: after the control unit controls the mobile unit to maintain the movement operation for a preset time, the control unit controls the operation movement of the mobile unit according to the detection result of the detection unit 40; and, the movement of the pipe is continuously detected by the detecting unit 40.

The method of carrying out the present application using the pipe support vibration damping device of the present application is described below with reference to the accompanying drawings.

First, as shown in fig. 3, when pumping is started (vibration damping is not required when pumping is not performed), the movement (initial movement) of the pipe is detected by the detection unit 40, and the detection result is subjected to signal conversion and then fed back to the control unit.

The control unit determines the operating parameters (current direction, magnitude, energization time of the coil) that suppress the initial movement from the feedback. Specifically, the initial movement of the pipe is decomposed into a first component and a second component in a first direction and a second direction, and the first moving mechanism and the second moving mechanism are controlled to generate a third component opposite to the first component and a fourth component opposite to the second component. Specifically, the required third and fourth components can be obtained by controlling the magnitude of the current of the coil 232a of the moving block 232. Accordingly, the direction, magnitude, and duration of the current of the coil 232a may be set such that the first and second moving mechanisms maintain the third and fourth components for a predetermined time to inhibit the initial movement of the pipe for the predetermined time.

Subsequently, the specific power supply of the coil 232a is performed by controlling the on/off of the relay on the circuit where the coil 232a is located, so that the coil 232a generates a magnetic force and the movement of the set third and fourth components is achieved. After completing the third and fourth component movements, moving mass 232 returns to its home position (which may correspond to the initial position of the pipe without impact) under the influence of damping spring 234.

By continuously detecting the movement of the pipeline through the detection unit 40, it can be known whether the movement of the third component and the fourth component suppresses the initial vibration (i.e. whether the vibration damping is achieved), if the vibration damping reaches an expected target (for example, if the movement amplitude of the pipeline is smaller than a set value, the expected target is considered to be reached), the vibration damping is completed, if the expected target is not reached, the vibration damping is performed again, and the control unit controls the first moving mechanism and the second moving mechanism to move the pipeline through the third component and the fourth component in real time according to the detection of the detection unit 40.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. The present application includes the combination of individual features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A pipe supporting and vibration damping device, characterized in that it comprises a connection piece (10) for connection to a pipe, a moving unit (20) for moving the connection piece (10), a detection unit (40) for detecting movement of the pipe, and a control unit electrically connected to the detection unit (40), the control unit being arranged to control the operation of the moving unit in accordance with the detection of the detection unit (40) to suppress movement of the pipe caused by fluid impact within the pipe.

2. The pipe supporting and vibration damping apparatus according to claim 1, wherein the connection member (10) includes a first connection portion (11) and a second connection portion (12), the moving unit (20) includes a first moving unit (21) and a second moving unit (22), the pipe supporting and vibration damping apparatus further includes a fixing member (30) for connecting a fixed base, the first connection portion (11) is used for connecting a pipe, the first moving unit (21) includes a first housing (211) connected to the second connection portion (12) and a first moving mechanism mounted to the first housing (211) to move the first connection portion (11) in a first direction, the second moving unit (22) includes a second housing (221) connected to the fixing member (30) and a second moving mechanism mounted to the second housing (221) to move the second connection portion (12) in a second direction, the first direction and the second direction are different directions, and the control unit is configured to control operations of the first moving mechanism and the second moving mechanism to suppress components of movement of the pipe in the first direction and the second direction caused by the fluid impact.

3. The pipe support vibration damping device according to claim 2, wherein the first moving mechanism and the second moving mechanism are both electromagnetic moving mechanisms (23), each electromagnetic moving mechanism (23) comprises magnets (231) arranged opposite to each other and a magnetic moving block (232) capable of moving between the magnets (231) through magnetic force, the magnets (231) and/or the moving block (232) are electromagnets, the moving block (232) is connected with the corresponding first connecting portion (11) or second connecting portion (12), and the control unit is used for controlling the energization state of the electromagnets.

4. The pipe support vibration damping device according to claim 3, wherein the electromagnetic moving mechanism (230) comprises a connecting rod (233) connected between the magnets (231), and the moving block (232) is slidably sleeved on the connecting rod (233).

5. The pipe support vibration damping device according to claim 3, characterized in that a buffer spring (234) is provided between the moving block (232) and the magnet (231).

6. The duct support vibration damping device according to claim 3, characterized in that the first housing (211) and/or the second housing (221) comprises a box body (24) having an opening and a cover body (25) covering the box body (24), the cover body (25) being provided with a long hole (251) allowing the corresponding first connecting portion (11) and/or the second connecting portion (12) to move.

7. Pipe support vibration damping device according to claim 2, characterized in that the first connection portion (11) and the second connection portion (12) are each a rod-like member perpendicular to the first and second directions.

8. Pipe support and shock absorption device according to any one of claims 2 to 7, wherein the first connection portion (11) is provided at its distal end with a load platform (111) for connection to the pipe, and the detection unit is mounted to the load platform (111).

9. A working machine, characterized in that the working machine comprises a boom, a pipe and a pipe support vibration damping device according to any one of claims 1-8, the connection piece is connected to the pipe, and the movement unit (20) provides movement with the boom as a reference.

10. A method of damping support for a pipe, the method comprising:

s1, detecting the initial movement of the pipeline;

11. The pipe support vibration damping method according to claim 10, wherein the step S2 includes:

s21, decomposing the initial movement into a first component along a first direction and a second component along a second direction, wherein the first direction is different from the second direction;

s22, respectively moving the pipeline along the first direction and the second direction by a third component and a fourth component along the direction opposite to the first component and the second component, wherein the magnitude of the first component is the same as that of the third component, and the magnitude of the second component is the same as that of the fourth component.

12. A pipe support vibration damping method according to claim 10 or 11, wherein the method uses the pipe support vibration damping device according to any one of claims 1 to 8, the method comprising:

after the control unit controls the mobile unit to maintain the movement operation for a preset time, the control unit controls the operation movement of the mobile unit according to the detection result of the detection unit (40); and the number of the first and second electrodes,

-continuously detecting the movement of the pipe by means of the detection unit (40).