Water-hammer-resistant vibration reduction pipe bracket mechanism and control system

Abstract

The invention relates to the technical field of water hammer resistance, in particular to a water hammer resistance vibration reduction pipe bracket mechanism and a control system. The invention provides a water-hammer-resistant vibration reduction pipe bracket mechanism which comprises a connecting pipe, a vibration reduction pipe and an airflow regulator, the connecting pipe is connected with the vibration reduction pipe coaxial with the connecting pipe, and the connecting pipe is provided with a first hydraulic sensor. When a positive water hammer effect occurs, an arc-shaped piston block moves downwards in a first cavity under the action of liquid pressure, the volume of a liquid cavity is increased, liquid in a connecting pipe is buffered, then the positive water hammer effect can be eliminated, an air flow regulator regulates the amount of air in an air cavity, redundant air is exhausted out of the air cavity, and when a negative water hammer effect occurs, the volume of the liquid cavity is increased. The pressure in the liquid cavity communicated with the connecting pipe is sharply reduced, the arc-shaped piston block moves towards the top end under the action of pressure difference, the air flow regulator inflates the air cavity, liquid in the liquid cavity flows into the connecting pipe, compensation is conducted on the interior of the connecting pipe, and the negative water hammer effect is relieved or eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-water hammer, and in particular to an anti-water hammer vibration-damping pipe support mechanism and a control system. Background Art

[0002] In the petrochemical industry, the startup and shutdown of pumps and the opening and closing of valves can cause the media (liquid) in pipelines to flow or stop momentarily. The sudden change in the media's flow pressure impacts the pipeline system, causing severe vibration. This also causes damage to pipe fittings and equipment due to the transient load impact. Periodic vibration of pipelines attached to dynamic equipment such as compressors can cause fatigue damage to the pipeline system, shortening its service life.

[0003] In the prior art, the method of resisting water hammer is mainly to add a compensating tube with an internal sliding connection and a cylindrical piston to the pipeline. The initial position of the cylindrical piston is located in the middle of the compensating tube. When the overall pressure in the pipeline changes, the cylindrical piston tends to stay at the end position or near the end position in the compensating tube and cannot return to the equilibrium (initial) position in time. When the positive water hammer effect and the negative water hammer effect occur again, the piston starts to buffer from the end position or the position near the end, the moving distance becomes shorter, and the buffering effect becomes worse, which can still easily cause violent local vibration of the pipeline. At the connection points of some pipelines, the water hammer effect destroys the pipeline connection, resulting in pipeline rupture and leakage. Summary of the Invention

[0004] (1) The problem to be solved by the present invention is: how to provide an anti-water hammer vibration damping pipe support mechanism with good buffering effect on the water hammer effect.

[0005] (2) Technical solution

[0006] The present invention provides an anti-water hammer vibration damping pipe support mechanism, comprising a connecting pipe, a vibration damping pipe and an airflow regulator;

[0007] The connecting pipe is connected to the vibration damping pipe coaxially therewith, and a first hydraulic pressure sensor is provided on the connecting pipe, and the first hydraulic pressure sensor is located on one side of the vibration damping pipe;

[0008] A first cavity is provided in the vibration damping tube, and arc-shaped piston blocks are symmetrically and movably connected in the first cavity. The two arc-shaped piston blocks cooperate to separate the first cavity into a liquid cavity and an air cavity.

[0009] The liquid cavity is communicated with the inner cavity of the connecting tube;

[0010] The air flow regulator is communicated with the air cavity, and is used to adjust the amount of gas in the air cavity.

[0011] According to one embodiment of the present invention, the vibration damping tube includes an outer tube and an inner tube that are coaxially arranged;

[0012] The inner tube is sleeved in the outer tube, and the first cavity is formed between the outer tube and the inner tube;

[0013] The connecting tube is provided with a first through hole communicating with the inner cavity of the connecting tube, the inner tube is provided with a second through hole communicating with the liquid cavity, and the first through hole and the second through hole are communicated.

[0014] According to one embodiment of the present invention, the vibration damping tube further comprises two annular plates;

[0015] The two ends of the inner tube are connected to the two ends of the outer tube through the annular plate respectively;

[0016] The inner walls of the two annular plates are connected to the outer wall of the connecting pipe;

[0017] A second cavity is formed between the inner tube and the connecting tube, and a C-shaped insulation member is provided in the second cavity;

[0018] Sealing plates are provided at both ends of the C-shaped heat-insulating member, and both ends of each sealing plate are respectively connected to the inner tube and the connecting tube.

[0019] According to one embodiment of the present invention, a partition is connected to the air cavity;

[0020] First air pressure sensors are symmetrically installed on both sides of the partition, and the partition is used to separate the air cavity into two non-connected first cavities;

[0021] There are two air flow regulators, and the air flow regulators correspond to the first cavities one by one;

[0022] The two sides of the second through hole are respectively connected to a first hollow baffle, and the two sides of the partition are respectively provided with a second hollow baffle;

[0023] A conical baffle is provided between the two first hollow baffles, and the conical baffle is connected to the inner side wall of the outer tube.

[0024] According to one embodiment of the present invention, the invention further comprises a base, a vibration damping assembly and a pipe rack, wherein the vibration damping pipe is fixed in the pipe rack, and the bottom of the pipe rack is connected to the vibration damping assembly for increasing the friction between the pipe rack and the vibration damping pipe;

[0025] The vibration damping component and the airflow regulator are both connected to the base.

[0026] According to one embodiment of the present invention, the vibration damping assembly includes a cylinder and a cylindrical piston;

[0027] The cylindrical piston is slidably connected to the cylinder body, and the cylindrical piston is connected to the pipe rack;

[0028] A third cavity is formed between the cylindrical piston and the cylinder body, and a second air pressure sensor is connected to the third cavity;

[0029] The vibration damping group further includes an elastic member, one end of which is connected to the pipe rack, and the other end of which is connected to the cylinder body.

[0030] According to one embodiment of the present invention, each of the air flow regulators includes a housing, a first branch pipe, a first solenoid valve, a second branch pipe, a second solenoid valve, a third branch pipe, a third solenoid valve, and a third air pressure sensor;

[0031] Each of the boxes is connected to the first cavity via a first branch pipe;

[0032] Each of the boxes is connected to the third cavity via a third branch pipe;

[0033] The first solenoid valve, the second solenoid valve and the third solenoid valve are used to control the opening and closing of the first branch pipe, the second branch pipe and the third branch pipe respectively;

[0034] The third air pressure sensor is installed in the box.

[0035] According to one embodiment of the present invention, the anti-water hammer vibration damping pipe support mechanism further includes a bidirectional air pump;

[0036] Each of the boxes is connected to the first vent of the bidirectional air pump via a second branch pipe;

[0037] Each of the boxes is connected to an exhaust pipe, and a one-way solenoid valve is provided on the exhaust pipe;

[0038] The second air vent of the bidirectional air pump is connected to an air bag for storing inert gas;

[0039] The air bag is communicated with the exhaust pipe.

[0040] According to one embodiment of the present invention, the pipe rack includes a supporting arc plate, an upper cover plate and a column;

[0041] The vibration damping pipe is located between the supporting arc plate and the upper cover plate;

[0042] The upper cover plate and the supporting arc plate cooperate to fix the vibration damping pipe in place;

[0043] One end of the column is connected to the supporting arc plate, and the other end is connected to the cylindrical piston.

[0044] A control system, comprising the aforementioned anti-water hammer vibration damping pipe support mechanism, further comprising: a controller, the controller comprising a storage module, an information acquisition module, a signal processing module and a feedback adjustment module;

[0045] The storage module is used to store preset parameter values of the first hydraulic pressure sensor, the first air pressure sensor, the second air pressure sensor, and the third air pressure sensor;

[0046] The information acquisition module is used to receive signals from the first hydraulic pressure sensor, the first air pressure sensor, the second air pressure sensor, and the third air pressure sensor, convert the signals, and then send them to the signal processing module;

[0047] When the signal processing module processes and calculates the signal, it queries the preset parameter values in the storage module, and after comparison and calculation, the signal processing module sends a control instruction to the feedback adjustment module;

[0048] The feedback regulation module converts the control instruction into a control signal and feeds it back to the anti-water hammer vibration damping pipe support mechanism.

[0049] Beneficial effects of the present invention:

[0050] When the first hydraulic sensor detects a sharp increase in pressure in the connecting pipe (positive water hammer effect), the pressure in the liquid cavity connected to the connecting pipe also increases sharply. Under the action of the liquid pressure, the arc-shaped piston block moves downward in the first cavity, increasing the volume of the liquid cavity. The liquid in the connecting pipe is buffered, thereby eliminating the positive water hammer effect. At the same time, the air flow regulator adjusts the gas volume in the gas cavity and discharges excess gas from the gas cavity. After the positive water hammer effect ends, the hydraulic pressure in the liquid cavity gradually recovers, and the air flow regulator adjusts the gas volume in the gas cavity to restore it to the initial pressure (at this time, the arc-shaped piston block moves to the middle and resets).

[0051] When the first hydraulic sensor detects a sharp decrease in pressure within the connecting pipe (negative water hammer effect), the pressure within the liquid chamber connected to the connecting pipe also decreases sharply. The pressure within the liquid chamber is lower than the pressure within the air chamber, and the arc-shaped piston block moves toward the top under the action of the pressure differential. At the same time, the airflow regulator inflates the air chamber so that it does not affect the movement of the arc-shaped piston block. As the arc-shaped piston block moves toward the top under the action of the pressure differential, the liquid in the liquid chamber flows into the connecting pipe, compensating for the pressure inside the connecting pipe and reducing or eliminating the negative water hammer effect. After the negative water hammer effect ends, the airflow regulator discharges the excess gas in the air chamber, allowing the arc-shaped piston block to reset to the middle position and prepare for the next water hammer buffering. Because the airflow regulator is set up to adjust the gas flow within the air chamber, the movement distance of the arc-shaped piston block can be always guaranteed, thereby achieving a good buffering effect and not easily causing severe local vibration of the pipeline. In addition, at some pipeline connections, the occurrence of pipeline rupture or leakage caused by the water hammer effect damaging the pipeline connection is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0053] Figure 1 A cross-sectional view of an anti-water hammer vibration-damping pipe support mechanism provided by an embodiment of the present invention;

[0054] Figure 2 A three-dimensional diagram of the connecting pipe, shock-absorbing pipe, upper cover plate and supporting arc provided in an embodiment of the present invention;

[0055] Figure 3 A cross-sectional view of an air flow regulator 5 provided in an embodiment of the present invention;

[0056] Figure 4 This is a schematic diagram of the connection relationship between the storage module, information acquisition module, signal processing module and feedback adjustment module in the controller provided by an embodiment of the present invention.

[0057] Icons: 1. Connecting pipe; 11. First hydraulic sensor; 12. Flow meter; 2. Vibration damping pipe; 21. Outer pipe; 22. Inner pipe; 23. Arc-shaped piston block; 24. First hollow baffle; 25. Partition; 26. First air pressure sensor; 27. Conical baffle; 28. Insulation; 29. Upper cover; 3. Supporting arc plate; 31. Column; 32. First annular plate; 33. Cylinder body; 34. Second annular plate; 35. Rigid spring; 36. Cylindrical piston; 37. Second air pressure sensor; 4. Base; 5. Air flow regulator; 51. Box body; 52. First branch pipe; 53. First solenoid valve; 54. Second branch pipe; 55. Second solenoid valve; 56. Third branch pipe; 57. Third solenoid valve; 58. Third air pressure sensor; 59. Exhaust pipe; 6. Two-way air pump; 7. Controller; 8. One-way solenoid valve. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] Example 1:

[0060] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides an anti-water hammer vibration damping pipe support mechanism, comprising a connecting pipe 1, a vibration damping pipe 2 and an airflow regulator 5;

[0061] The connecting pipe 1 is connected to a coaxial damping pipe 2, and a first hydraulic pressure sensor 11 is provided on the connecting pipe 1. The first hydraulic pressure sensor 11 is located on one side of the damping pipe 2;

[0062] A first cavity is provided in the damping tube 2, and arc-shaped piston blocks 23 are symmetrically and movably connected in the first cavity. The two arc-shaped piston blocks 23 cooperate to separate the first cavity into a liquid cavity and an air cavity.

[0063] The liquid cavity is connected to the inner cavity of the connecting tube 1;

[0064] The air flow regulator 5 is connected to the air cavity, and is used to adjust the amount of gas in the air cavity.

[0065] In the initial position (no water hammer effect), the arc-shaped piston block 23 is located in the middle (such as Figure 1 As shown), at this time, the pressure in the liquid cavity is the same as the pressure in the connecting pipe 1, and the pressure in the liquid cavity is the same as the pressure in the gas cavity.

[0066] When the first hydraulic sensor 11 detects a sharp increase in pressure in the connecting pipe 1 (a positive water hammer effect), the pressure in the liquid cavity connected to the connecting pipe 1 also increases sharply. Under the action of the liquid pressure, the arc-shaped piston block 23 moves downward in the first cavity, increasing the volume of the liquid cavity. The liquid in the connecting pipe 1 is buffered, thereby eliminating the positive water hammer effect. At the same time, the air flow regulator 5 adjusts the gas volume in the gas cavity and discharges excess gas from the gas cavity. After the positive water hammer effect ends, the hydraulic pressure in the liquid cavity gradually recovers, and the air flow regulator 5 adjusts the gas volume in the gas cavity to restore it to the initial pressure (at this time, the arc-shaped piston block 23 moves to the middle and resets).

[0067] When the first hydraulic pressure sensor 11 detects a sharp decrease in pressure within the connecting pipe 1 (negative water hammer effect), the pressure within the liquid chamber connected to the connecting pipe 1 also decreases sharply. The pressure within the liquid chamber is lower than the pressure within the air chamber, and the arc-shaped piston block 23 moves toward the top under the action of the pressure differential. At the same time, the airflow regulator 5 inflates the air chamber so that it does not affect the movement of the arc-shaped piston block 23. As the arc-shaped piston block 23 moves toward the top under the action of the pressure differential, the liquid in the liquid chamber flows into the connecting pipe 1, compensating for the negative water hammer effect and reducing or eliminating the negative water hammer effect. After the negative water hammer effect ends, the airflow regulator 5 discharges the excess air in the air chamber, allowing the arc-shaped piston block 23 to return to its center position and prepare for the next water hammer buffering. Because the airflow regulator 5 is installed, it can adjust the gas flow within the air chamber, thereby ensuring that the travel distance of the arc-shaped piston block 23 is always guaranteed, thereby improving the buffering effect and preventing severe local vibration of the pipeline. This reduces the risk of pipeline breakage or leakage caused by water hammer damage at some pipeline joints.

[0068] Flanges are installed at both ends of the connecting pipe 1, and the overall pipe support mechanism can be connected to the pipeline system through the flanges at both ends of the connecting pipe 1. A first hydraulic sensor 11 and a flow meter 12 are respectively installed at both ends of the connecting pipe 1. The first hydraulic sensor 11 is used to collect the real-time hydraulic signal in the connecting pipe 1 and send the signal to the controller 7. The flow meter 12 is used to collect the real-time liquid quantity signal in the connecting pipe 1 and send the signal to the controller 7. The airflow regulator 5 is feedback-adjusted by the controller 7, thereby realizing the prediction and adaptation of water hammer effects of different intensity levels.

[0069] According to one embodiment of the present invention, the vibration damping tube 2 includes an outer tube 21 and an inner tube 22 that are coaxially arranged;

[0070] The inner tube 22 is sleeved inside the outer tube 21, and a first cavity is formed between the outer tube 21 and the inner tube 22;

[0071] The connecting tube 1 is provided with a first through hole communicating with the inner cavity of the connecting tube 1 , and the inner tube 22 is provided with a second through hole communicating with the liquid cavity. The first through hole and the second through hole are communicated.

[0072] The liquid in the connecting tube 1 enters the liquid cavity through the first through hole and the second through hole.

[0073] According to one embodiment of the present invention, the vibration damping tube 2 further comprises two annular plates;

[0074] The two ends of the inner tube 22 are connected to the two ends of the outer tube 21 through an annular plate respectively;

[0075] The inner walls of the two annular plates are connected to the outer wall of the connecting pipe 1;

[0076] The inner tube 22 and the connecting tube 1 form a second cavity, in which a C-shaped insulation member 28 is provided;

[0077] Sealing plates are provided at both ends of the C-shaped heat-insulating member 28 , and both ends of each sealing plate are connected to the inner tube 22 and the connecting tube 1 respectively.

[0078] The C-shaped heat-insulating member 28 can keep the liquid in the connecting pipe 1 warm or cold, and the provided sealing plate can prevent the liquid from contacting the C-shaped heat-insulating member 28 .

[0079] Of course, in this embodiment, the vibration damping tube 2 can also be a single-layer circular tube. In this case, a first cavity can also be formed between the outer wall of the connecting tube 1 and the inner wall of the single-layer circular tube. Its purpose does not deviate from the design concept of the present invention, and therefore, it should fall within the scope of protection of the present invention.

[0080] According to one embodiment of the present invention, a partition 25 is connected to the air cavity;

[0081] First air pressure sensors 26 are symmetrically mounted on both sides of the partition 25. The partition 25 is used to separate the air cavity into two non-connected first cavities.

[0082] There are two air flow regulators 5, and the air flow regulators 5 correspond to the first cavities one by one;

[0083] The two sides of the second through hole are respectively connected to the first hollow baffle 24, and the two sides of the partition 25 are respectively provided with a second hollow baffle;

[0084] A conical baffle 27 is provided between the two first hollow baffles 24 , and the conical baffle 27 is connected to the inner wall of the outer tube 21 .

[0085] The two first air pressure sensors 26 are respectively used to monitor the air pressure in the corresponding first cavity;

[0086] The arc-shaped piston block 23, the first hollow baffle 24 and the second hollow baffle correspond to each other one by one. Each arc-shaped piston block 23 is located between the corresponding first hollow baffle 24 and the second hollow baffle. The first hollow baffle 24 and the second hollow baffle cooperate to limit the movement range of the arc-shaped piston block 23 to prevent the arc-shaped piston block 23 from being dislocated.

[0087] Specifically, the second hollow baffle can prevent the arc-shaped piston block 23 from blocking the air port communicating with the air cavity and the air flow regulator 5 when moving, thereby improving the stability of the arc-shaped piston block 23 when resetting.

[0088] The first hollow baffle 24 can prevent the arc-shaped piston block 23 from blocking the second through hole when moving, thereby affecting the flow of water into the liquid cavity.

[0089] Since a conical baffle 27 is provided between the two first hollow baffles 24, the cross-sectional area of the conical baffle 27 at one end close to the second through hole is smaller than the cross-sectional area at the other end, and the conical baffle 27 is located directly above the second through hole, when the liquid passes through the first through hole and the second through hole in the connecting tube 1, the conical baffle 27 destroys the flow state to reduce the impact of the liquid, and after diverting and buffering the liquid, the liquid enters the liquid cavity. The conical baffle 27 can also act as a reinforcing rib to strengthen the strength of the outer tube 21.

[0090] A second hydraulic pressure sensor is provided at the end of the conical baffle 27. The second hydraulic pressure sensor can detect the liquid pressure in the liquid chamber.

[0091] When the shock absorber tube 2 is far enough away from the first hydraulic sensor 11, or when each sensor is precise enough, the first hydraulic sensor 11 is located near the valve. When the first hydraulic sensor 11 detects a hydraulic change, the second hydraulic sensor is still in the hydraulic pressure under normal working conditions without water hammer. The amount of gas in the air cavity can be adjusted in advance through the air flow regulator 5, so that before the positive water hammer effect occurs, the arc-shaped piston block 23 moves to the top end in advance, and before the negative water hammer effect occurs, the arc-shaped piston block 23 moves to the bottom end in advance, thereby increasing the sliding range of the arc-shaped piston block 23 during the water hammer effect and improving the buffering effect.

[0092] The gas filled into the air cavity is an inert gas, preferably nitrogen, which can keep the air warm or cold.

[0093] According to one embodiment of the present invention, the anti-water hammer vibration damping pipe support mechanism further includes a base 4, a vibration damping assembly and a pipe rack. The vibration damping pipe 2 is fixed in the pipe rack. The bottom of the pipe rack is connected to a vibration damping assembly for increasing the friction between the pipe rack and the vibration damping pipe 2.

[0094] The vibration damping component and the airflow regulator 5 are both connected to the base 4 .

[0095] By setting up the vibration damping component, the friction between the pipe rack and the vibration damping pipe 2 can be increased, so that the vibration damping pipe 2 is not easy to move along its axial direction when it is subjected to the water hammer effect, thereby reducing the axial vibration between the pipe rack and the vibration damping pipe 2 during the water hammer effect.

[0096] According to one embodiment of the present invention, the vibration damping assembly includes a cylinder 33 and a cylindrical piston 36;

[0097] The cylindrical piston 36 is slidably connected in the cylinder 33, and the cylindrical piston 36 is connected to the pipe rack;

[0098] A third cavity is formed between the cylindrical piston 36 and the cylinder body 33, and a second air pressure sensor 37 is connected to the third cavity;

[0099] The vibration damping group further includes an elastic member, one end of which is connected to the pipe rack, and the other end of which is connected to the cylinder body 33 .

[0100] The elastic member includes a first annular plate 32, a rigid spring 35 and a second annular plate 34 connected in sequence;

[0101] The first annular plate 32 is connected to the column 31 in the pipe rack, and the second annular plate 34 is connected to the outer wall of the cylinder 33. A rigid spring 35 provides a vertical elastic preload to the damping tube 2 and connecting tube 1. When the damping tube 2 vibrates vertically (not due to water hammer), the cylindrical piston 36 slides slightly within the cylinder 33, cooperating with the vertical elastic force of the rigid spring 35 to achieve a vibration-damping function.

[0102] The initial pressure value of the inert gas in the air cavity is the same as the rated hydraulic pressure in the connecting pipe 1. When there is no water hammer effect, the two arc-shaped piston blocks 23 remain stable in the first cavity and are both located in the middle of the vibration damping tube 2. When the water hammer effect occurs, that is, when the hydraulic pressure in the connecting pipe 1 suddenly increases or decreases, the arc-shaped piston block 23 slides in the first cavity under the action of the pressure difference. The sliding of the arc-shaped piston block 23 in the first cavity causes the volume of the liquid cavity to change adaptively, thereby achieving anti-water hammer effect. The vibration damping tube 2 is installed on the vibration damping assembly through a pipe rack. The vibration damping assembly is fixedly installed on the top of the base 4. A pair of airflow regulators are installed on the base 4 5 and a two-way air pump 6, the two-way air pump 6 is connected to the airflow regulator 5, and the two-way air pump 6 can be used to supply or extract gas to the airflow regulator 5, so as to adjust the amount of gas in the airflow regulator 5. The airflow regulator 5 is connected to the air cavity, and the airflow regulator 5 is also connected to the vibration damping component. The vibration damping component can be used to damp the longitudinal vibration of the connecting pipe 1 and the vibration damping pipe 2 as a whole, reduce the vibration of the connecting pipe 1 and the pipeline system, and reduce the vibration during the anti-water hammer process. The amount of gas in the vibration damping pipe 2 and the vibration damping component is adjusted by the airflow regulator 5, so as to adapt to and adjust water hammer effects of different intensities.

[0103] According to one embodiment of the present invention, each air flow regulator 5 includes a housing 51, a first branch pipe 52, a first solenoid valve 53, a second branch pipe 54, a second solenoid valve 55, a third branch pipe 56, a third solenoid valve 57 and a third air pressure sensor 58;

[0104] Each box 51 is connected to the corresponding first cavity through a first branch pipe 52;

[0105] Each box 51 is connected to the third cavity via a third branch pipe 56;

[0106] The first solenoid valve 53, the second solenoid valve 55 and the third solenoid valve 57 are used to control the opening and closing of the first branch pipe 52, the second branch pipe 54 and the third branch pipe 56 respectively;

[0107] The third air pressure sensor 58 is installed in the box 51 .

[0108] According to one embodiment of the present invention, the anti-water hammer vibration reduction pipe support mechanism further includes a bidirectional air pump 6;

[0109] Each box 51 is connected to the first vent of the two-way air pump 6 through a second branch pipe 54;

[0110] Each box 51 is connected to an exhaust pipe 59, and a one-way solenoid valve 8 is provided on the exhaust pipe 59;

[0111] The second vent of the bidirectional air pump 6 is connected to a gas bag for storing inert gas;

[0112] The air bag is connected to the exhaust pipe 59.

[0113] The fixed end of the one-way solenoid valve 8 is arranged on the base 4 .

[0114] When the air pressure in the air flow regulator 5 is too high, the excess gas exceeding the preset value is discharged into the air bag for storage through the one-way solenoid valve 8, thereby realizing gas kinetic energy recovery.

[0115] The first air pressure sensor 26 is used to collect the air pressure signal of the inert gas in the air cavity and send the signal to the controller 7. The controller 7 is installed on the base 4. A second branch pipe 54 is connected to the upper side of the box body 51. The second branch pipe 54 is connected to the first air vent of the two-way air pump 6. A second solenoid valve 55 is installed at the connection between the second branch pipe 54 and the box body 51. The second solenoid valve 55 is used to control the air flow between the second branch pipe 54 and the box body 51. A third branch pipe 56 is connected to the side of the box body 51 away from the second branch pipe 54. The third branch pipe 56 is connected to the third cavity in the cylinder body 33. A second air pressure sensor 37 is installed in the third cavity. The second air pressure sensor 37 is used In order to collect the gas pressure signal in the third cavity and send the signal to the controller 7, a third solenoid valve 57 is installed at the connection between the third branch pipe 56 and the box body 51. The third solenoid valve 57 is used to control the air flow between the box body 51 and the third branch pipe 56. A third air pressure sensor 58 is installed in the box body 51. The third air pressure sensor 58 is used to collect the pressure signal in the box body 51 and send the signal to the controller 7. The controller 7 processes the collected signal and then performs feedback adjustment on the airflow regulator 5 and the two-way air pump 6, thereby adjusting the inert gas pressure in the cylinder body 33 and the inert gas pressure in the vibration damping tube 2, thereby realizing anti-water hammer functions of different strength levels.

[0116] According to one embodiment of the present invention, the pipe rack includes a supporting arc plate 3, an upper cover plate 29 and a column 31;

[0117] The vibration damping tube 2 is located between the supporting arc plate 3 and the upper cover plate 29;

[0118] The upper cover plate 29 and the supporting arc plate 3 cooperate to fix the vibration damping tube 2 in place;

[0119] One end of the column 31 is connected to the supporting arc plate 3 , and the other end thereof is connected to the cylindrical piston 36 .

[0120] The upper cover plate 29 and the supporting arc plate 3 are fixed with bolts and nuts.

[0121] Example 2:

[0122] like Figure 4 As shown, a control system includes an anti-water hammer vibration reduction pipe support mechanism, and also includes: a controller 7, the controller 7 includes a storage module, an information acquisition module, a signal processing module and a feedback adjustment module;

[0123] Specifically, the storage module is used to store preset parameter values of the first hydraulic sensor 11, the second hydraulic sensor, the flow meter 12, the first air pressure sensor 26, the second air pressure sensor 37, and the third air pressure sensor 58 in the form of a data table. The user can modify the parameter values of the data table in the storage module through the data interface, so that the control system parameters can be adjusted according to different installation locations and usage scenarios.

[0124] The information acquisition module is used to receive signals from the first hydraulic sensor 11, the flow meter 12, the second hydraulic sensor, the flow meter 12, the first air pressure sensor 26, the second air pressure sensor 37 and the third air pressure sensor 58, and convert the signals and send them to the signal processing module;

[0125] When the signal processing module processes and calculates the signal, it queries the preset parameter values in the data table in the storage module through SQL statements. After comparison and calculation, the signal processing module sends a control instruction to the feedback adjustment module;

[0126] The feedback regulation module converts the control instruction into a control signal and feeds it back to the bidirectional air pump 6, the first solenoid valve 53, the second solenoid valve 55, the third solenoid valve 57 and the one-way solenoid valve 8 in the anti-water hammer vibration damping pipe support mechanism;

[0127] This enables automated control of the anti-water hammer vibration damping pipe support mechanism. (The operation and processing of each module in the controller 7 is based on existing technology and will not be described in detail.)

[0128] The preset parameter values include:

[0129] The first air pressure sensor 26 is provided with an initial threshold value;

[0130] The second air pressure sensor 37 is provided with a maximum safety threshold, a minimum safety threshold, and an initial threshold between the maximum safety threshold and the minimum safety threshold;

[0131] The third air pressure sensor 58 is provided with a maximum safety threshold and a minimum safety threshold, and a first threshold, an initial threshold, and a second threshold between the maximum safety threshold and the minimum safety threshold, wherein the first threshold, the initial threshold, and the second threshold decrease in sequence.

[0132] The first threshold is smaller than the maximum safety threshold of the second air pressure sensor 37 , and the second threshold is larger than the minimum safety threshold set for the second air pressure sensor 37 .

[0133] The first hydraulic pressure sensor 11 is provided with an initial threshold value.

[0134] The maximum safety threshold of the third air pressure sensor 58 is greater than the maximum safety threshold of the second air pressure sensor 37 , and the minimum safety threshold thereof is less than the minimum safety threshold of the second air pressure sensor 37 .

[0135] The initial threshold value of the first air pressure sensor 26 , the initial threshold value of the second air pressure sensor 37 , the initial threshold value of the third air pressure sensor 58 , and the initial threshold value of the first hydraulic pressure sensor 11 are all the same.

[0136] Specifically, the liquid flows from one side of the flow meter 12 through the vibration damping pipe 2 and then flows through the first hydraulic pressure sensor 11. A valve is installed at the end of the first hydraulic pressure sensor 11 away from the flow meter 12;

[0137] In the initial state, the bidirectional air pump 6, the one-way solenoid valve 8, the first solenoid valve 53, the second solenoid valve 55 and the third solenoid valve 57 remain closed;

[0138] When there is no water hammer effect, such as Figure 1 As shown, the arc-shaped piston block 23 is located in the middle of the first cavity, and the inert gas in the cavity and the heat-insulating member 28 keep the liquid in the connecting pipe 1 warm or cold.

[0139] During the positive water hammer effect (valve closed), the pressure is provided by the liquid flowing from the rear. The hydraulic pressure value collected by the first hydraulic sensor 11 and the flow meter 12 in the connecting pipe 1 increases, and the amount of liquid decreases. The liquid in the connecting pipe 1 flows into the liquid cavity in the shock absorber tube 2. The hydraulic pressure in the liquid cavity connected to the connecting pipe 1 increases, and the first solenoid valve 53 is opened. Under the action of the pressure difference, the two sides of the first cavity push the arc-shaped piston block 23 downward, gradually approaching the second hollow baffle. The high-pressure inert gas in each first cavity enters the box body 51 through the first branch pipe 52. When the pressure value of the third air pressure sensor 58 in the box body 51 exceeds the first threshold value preset in the storage module, the third solenoid valve 5 is opened. 7. The third solenoid valve 57 passes the high-pressure inert gas in the box 51 into the third cavity. The second air pressure sensor 37 is greater than the initial threshold value, and the air pressure in the third cavity increases, pushing the cylindrical piston 36 to move upward, and then the column 31 and the supporting arc plate 3 move upward, increasing the friction between the supporting arc plate 3 and the vibration damping tube 2, and reducing the axial vibration between the supporting arc plate 3 and the vibration damping tube 2 during the water hammer effect. When the second air pressure sensor 37 in the third cavity reaches the maximum safety threshold, the third solenoid valve 57 is closed. At the same time, the liquid cavity pressure is the same as the pressure in the first cavity, and the arc piston block 23 no longer moves. At this time, a gap is left between the arc piston block 23 and the second hollow baffle.

[0140] When the positive water hammer effect gradually disappears, the hydraulic value detected by the first hydraulic sensor 11 gradually decreases and returns to the initial hydraulic value. At this time, the second hydraulic sensor detects that the hydraulic pressure in the liquid cavity is gradually restored. The arc piston block 23 moves from the bottom to the middle under the action of the pressure difference. The volume of the air cavity (two first cavities) increases and the pressure decreases. When the third air pressure sensor 58 in the box body 51 is lower than the second air pressure sensor 37, the third solenoid valve 57 opens, and the inert gas flows from the third cavity to the first cavity to replenish gas. The gas in the third cavity decreases, the pressure decreases, and the cylindrical piston 36 moves downward until the second air pressure sensor 37 reaches the initial threshold value, and the third solenoid valve 57 is closed. At this time, when the first air pressure sensor 26 returns to the initial threshold value, the arc piston block 23 is reset, and the first solenoid valve 53 and the third solenoid valve 57 are closed.

[0141] In extreme cases, during the positive water hammer effect, when the second hydraulic pressure sensor 37 reaches the maximum safety threshold and the third solenoid valve 57 is closed, the pressure in the first chamber is still rising. When the third air pressure sensor 58 reaches its maximum safety threshold, the controller 7 controls the one-way solenoid valve 8 to open and discharge the excess gas into the air bag. When the third air pressure sensor 58 does not exceed its maximum safety threshold, the one-way solenoid valve 8 is closed. During the disappearance of the positive water hammer effect, the pressure in the liquid chamber decreases, the arc-shaped piston block 23 moves toward the middle, the volume of the first chamber increases, and the pressure decreases. When the value of the third air pressure sensor 58 is lower than the value of the second air pressure sensor 37, the third solenoid valve 57 is opened, the gas in the third cavity flows into the first cavity, the pressure in the third cavity decreases, and the cylindrical piston 36 moves downward. When the second air pressure sensor 37 reaches the initial threshold, the cylindrical piston 36 is reset and the third solenoid valve 57 is closed. At this time, the value of the first air pressure sensor 26 is lower than the preset threshold, and the two-way air pump 6 is turned on to continue inflating the air cavity until the first air pressure sensor 26 reaches the initial threshold, and then the first solenoid valve 53 and the second solenoid valve 55 are closed.

[0142] During the negative water hammer effect (valve opening), the hydraulic pressure value collected by the first hydraulic sensor 11 and the flow meter 12 decreases and the liquid volume increases. The pressure in the first cavity is greater than the pressure in the liquid cavity. The arc piston block 23 moves upward under the action of the pressure difference, opening the first solenoid valve 53. During the upward movement of the arc piston block 23, the volume of the liquid cavity decreases, and the liquid in the liquid cavity flows into the connecting pipe 1 to compensate, thereby slowing down the negative water hammer effect. At the same time, the volume of the first cavity increases, the pressure decreases, and the gas in the box 51 flows into the first cavity until the third air pressure sensor 58 is low. At the second threshold, the third solenoid valve 57 is opened. Under the action of the pressure difference, the gas in the third cavity moves toward the box body 51 and the first cavity, the cylindrical piston 36 moves downward, and the friction between the vibration damping tube 2 and the upper cover plate 29 increases, thereby reducing the axial vibration between the arc plate 3 and the vibration damping tube 2 when the water hammer effect is reduced. When the second air pressure sensor 37 reaches the minimum safety threshold, the third solenoid valve 57 is closed. At the same time, the liquid cavity pressure is the same as the pressure in the first cavity, and the arc piston block 23 no longer moves. At this time, a gap is left between the arc piston block 23 and the first hollow baffle 24.

[0143] When the negative water hammer effect gradually disappears, that is, the hydraulic value of the first hydraulic sensor 11 gradually recovers to the initial threshold value, the hydraulic pressure increases, the arc piston block 23 moves toward the middle, the volume of the air cavity (two first cavities) decreases, the pressure increases, and the inert gas flows from the first cavity to the box body 51. When the value of the third air pressure sensor 58 in the box body 51 is higher than the value of the third solenoid valve 57 at this time, the third solenoid valve 57 is opened, and the inert gas flows into the third cavity under the action of the pressure difference. The cylindrical piston 36 moves upward until the second air pressure sensor 37 reaches the initial threshold value and closes the third solenoid valve 57. At this time, when the first air pressure sensor 26 recovers to the initial threshold value, the arc piston block 23 resets and closes the first solenoid valve 53.

[0144] In extreme cases, during the negative water hammer effect, after the third solenoid valve 57 is closed, the pressure value of the first hydraulic sensor 11 is still decreasing, and the arc-shaped piston block 23 continues to approach the first hollow baffle 24. At this time, the pressure of the third air pressure sensor 58 and the first air pressure sensor 26 continues to decrease. When the third air pressure sensor 58 reaches its minimum safety threshold, the controller 7 controls the two-way air pump 6 to turn on and fill the gas into the first cavity. When the value of the third air pressure sensor 58 rises to its minimum safety threshold, the two-way air pump 6 is turned off. During the disappearance of the negative water hammer effect, the pressure in the liquid cavity increases, the arc-shaped piston block 23 moves toward the middle, and the volume of the first cavity is reduced. The pressure decreases and increases. When the value of the third air pressure sensor 58 is higher than the value of the second air pressure sensor 37, the third solenoid valve 57 is opened, and the gas in the box 51 flows to the third cavity. The pressure in the third cavity increases, and the cylindrical piston 36 rises. When the second air pressure sensor 37 reaches the initial threshold, the cylindrical piston 36 is reset and the third solenoid valve 57 is closed. At this time, since the first air pressure sensor 26 is higher than the initial threshold, the one-way solenoid valve 8 continues to be opened to discharge excess gas in the box 51 and the first cavity until the first air pressure sensor 26 reaches the initial threshold, and then the one-way solenoid valve 8, the first solenoid valve 53 and the second solenoid valve 55 are closed.

[0145] In the description of the present invention, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0146] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to connections between the internal parts of two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-water hammer vibration damping pipe support mechanism, characterized in that: It comprises a connecting pipe (1), a vibration damping pipe (2) and an airflow regulator (5); The connecting pipe (1) is connected to the vibration damping pipe (2) coaxial therewith, and a first hydraulic pressure sensor (11) is provided on the connecting pipe (1), and the first hydraulic pressure sensor (11) is located on one side of the vibration damping pipe (2); A first cavity is provided in the vibration damping tube (2), and an arc-shaped piston block (23) is symmetrically and movably connected in the first cavity. The two arc-shaped piston blocks (23) cooperate to separate the first cavity into a liquid cavity and an air cavity. The liquid cavity is in communication with the inner cavity of the connecting tube (1); The air flow regulator (5) is in communication with the air cavity, and the air flow regulator (5) is used to adjust the amount of gas in the air cavity.

2. The anti-water hammer vibration damping pipe support mechanism according to claim 1, characterized in that: The vibration damping tube (2) comprises an outer tube (21) and an inner tube (22) which are coaxially arranged; The inner tube (22) is sleeved inside the outer tube (21), and the first cavity is formed between the outer tube (21) and the inner tube (22); The connecting tube (1) is provided with a first through hole communicating with the inner cavity of the connecting tube (1), and the inner tube (22) is provided with a second through hole communicating with the liquid cavity, and the first through hole and the second through hole are communicated.

3. The anti-water hammer vibration damping pipe support mechanism according to claim 2, characterized in that: The vibration damping tube (2) further comprises two annular plates; The two ends of the inner tube (22) are connected to the two ends of the outer tube (21) through the annular plate respectively; The inner walls of the two annular plates are connected to the outer wall of the connecting pipe (1); A second cavity is formed between the inner tube (22) and the connecting tube (1), and a C-shaped heat-insulating member (28) is provided in the second cavity; Sealing plates are provided at both ends of the C-shaped heat-insulating member (28), and both ends of each sealing plate are respectively connected to the inner tube (22) and the connecting tube (1).

4. The anti-water hammer vibration damping pipe support mechanism according to claim 2, characterized in that: A partition (25) is connected to the air cavity; First air pressure sensors (26) are symmetrically mounted on both sides of the partition (25), and the partition (25) is used to separate the air cavity into two non-connected first cavities; Two airflow regulators (5) are provided, and the airflow regulators (5) correspond one to one with the first cavities; The two sides of the second through hole are respectively connected to a first hollow baffle (24), and the two sides of the partition (25) are respectively provided with a second hollow baffle; A conical baffle (27) is provided between the two first hollow baffles (24), and the conical baffle (27) is connected to the inner side wall of the outer tube (21).

5. The anti-water hammer vibration damping pipe support mechanism according to claim 4, characterized in that: It also includes a base (4), a vibration damping assembly and a pipe rack, wherein the vibration damping pipe (2) is fixed in the pipe rack, and the bottom of the pipe rack is connected to the vibration damping assembly for increasing the friction between the pipe rack and the vibration damping pipe (2); The vibration damping component and the airflow regulator (5) are both connected to the base (4).

6. The anti-water hammer vibration damping pipe support mechanism according to claim 5, characterized in that: The vibration damping assembly includes a cylinder (33) and a cylindrical piston (36); The cylindrical piston (36) is slidably connected in the cylinder (33), and the cylindrical piston (36) is connected to the pipe rack; A third cavity is formed between the cylindrical piston (36) and the cylinder body (33), and a second air pressure sensor (37) is connected to the third cavity; The vibration damping group further comprises an elastic member, one end of which is connected to the pipe rack, and the other end of which is connected to the cylinder (33).

7. The anti-water hammer vibration damping pipe support mechanism according to claim 6, characterized in that: Each of the air flow regulators (5) comprises a housing (51), a first branch pipe (52), a first solenoid valve (53), a second branch pipe (54), a second solenoid valve (55), a third branch pipe (56), a third solenoid valve (57) and a third air pressure sensor (58); Each of the boxes (51) is connected to the first cavity via a first branch pipe (52); Each of the boxes (51) is connected to the third cavity via a third branch pipe (56); The first solenoid valve (53), the second solenoid valve (55) and the third solenoid valve (57) are used to control the opening and closing of the first branch pipe (52), the second branch pipe (54) and the third branch pipe (56), respectively; The third air pressure sensor (58) is installed in the box (51).

8. The anti-water hammer vibration damping pipe support mechanism according to claim 7, characterized in that: The anti-water hammer vibration damping pipe support mechanism further includes a bidirectional air pump (6); Each of the boxes (51) is connected to the first vent of the bidirectional air pump (6) via a second branch pipe (54); Each of the boxes (51) is connected to an exhaust pipe (59), and a one-way solenoid valve (8) is provided on the exhaust pipe (59); The second vent of the bidirectional air pump (6) is connected to a gas bag for storing inert gas; The air bag is communicated with the exhaust pipe (59).

9. The anti-water hammer vibration damping pipe support mechanism according to claim 6, characterized in that: The pipe rack comprises a supporting arc plate (3), an upper cover plate (29) and a column (31); The vibration damping tube (2) is located between the supporting arc plate (3) and the upper cover plate (29); The upper cover plate (29) and the supporting arc plate (3) cooperate to fix the vibration damping tube (2); One end of the column (31) is connected to the supporting arc plate (3), and the other end is connected to the columnar piston (36).

10. A control system comprising the anti-water hammer vibration damping pipe support mechanism according to claim 8, characterized in that: Also includes: A controller (7), comprising a storage module, an information acquisition module, a signal processing module, and a feedback adjustment module; The storage module is used to store preset parameter values of the first hydraulic pressure sensor (11), the first air pressure sensor (26), the second air pressure sensor (37), and the third air pressure sensor (58); The information acquisition module is used to receive signals from the first hydraulic pressure sensor (11), the first air pressure sensor (26), the second air pressure sensor (37), and the third air pressure sensor (58), convert the signals, and then send them to the signal processing module; When the signal processing module processes and calculates the signal, it queries the preset parameter values in the storage module, and after comparison and calculation, the signal processing module sends a control instruction to the feedback adjustment module; The feedback regulation module converts the control instruction into a control signal and feeds it back to the anti-water hammer vibration damping pipe support mechanism.

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