CN117628308B - Pulsation damper and testing device thereof - Google Patents
Pulsation damper and testing device thereof Download PDFInfo
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- CN117628308B CN117628308B CN202410103134.XA CN202410103134A CN117628308B CN 117628308 B CN117628308 B CN 117628308B CN 202410103134 A CN202410103134 A CN 202410103134A CN 117628308 B CN117628308 B CN 117628308B
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- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 230000010349 pulsation Effects 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 109
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 abstract description 8
- 238000005381 potential energy Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 description 11
- 210000004907 gland Anatomy 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 5
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 241000233866 Fungi Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of dampers, in particular to a pulsation damper and a testing device thereof, which comprises a fixed plate, wherein a water tank capable of moving up and down and a testing table for installing the damper are arranged on the fixed plate, a closed loop is formed between the water tank and the damper, the water tank reciprocates in the vertical direction under the action of a driving component, and the testing table is driven to reciprocate in the direction opposite to the water tank under the action of a transmission component. According to the invention, water in the water tank circularly flows at the damper, the water tank reciprocates in the vertical direction under the action of the driving component and drives the test bench to reciprocate in the direction opposite to the water tank under the action of the driving component, so that potential energy difference between the water tank and the damper is changed, and pressure change of water flow in the water flow pipeline is caused, thereby providing a real test environment for testing the damper.
Description
Technical Field
The invention relates to the technical field of dampers, in particular to a pulsation damper and a testing device thereof.
Background
The pulsation damper is a pressure container for eliminating liquid pressure pulsation or flow pulsation in a pipeline, can play roles in stabilizing the pressure and flow of the fluid, eliminating vibration of the pipeline, protecting downstream instruments and equipment, increasing the volumetric efficiency of a pump and the like, and after the damper is designed and produced, the performance of the damper needs to be tested, and whether the damper can meet the design requirement is verified.
During testing of pulsation dampers, it was found that: when the existing pulsation damper is used for testing performance, water is pumped by a water pump to flow through the damper, and water flow at the moment is constant pressure, but in an actual use environment, the pressure of the water flow flowing through the pulsation damper generally fluctuates, and a traditional testing mode cannot simulate the water flow in the actual situation, so that a testing result is inaccurate, and improvement is made.
Disclosure of Invention
Based on the technical problems existing in the prior art, the invention provides a pulsation damper and a testing device thereof.
The invention provides a pulsation damper, which comprises a heat preservation cover with a water inlet pipe and a water outlet pipe, wherein a base is fixed at the bottom of the heat preservation cover, a gland and a shell are arranged at the top of the heat preservation cover, the gland is provided with a barometer at the top, an energy storage structure which is arranged on the gland and is communicated with the barometer is arranged in the shell, and a fungus valve is arranged at the bottom end of the shell.
Preferably, the energy storage structure is an air bag.
Preferably, the energy storage structure is a diaphragm, and an air chamber communicated with the barometer is formed between the diaphragm and the gland.
The pulsation damper testing device comprises a fixed plate 9, wherein a fixed seat 19 capable of moving up and down and a testing table 11 for installing a damper are arranged on the fixed plate 9, a water tank 10 is fixed on the fixed seat 19, a closed loop is formed between the water tank 10 and the damper, the fixed seat 19 reciprocates in the vertical direction under the action of a driving assembly, and the fixed seat 19 drives the testing table 11 to reciprocate in the direction opposite to the water tank 10 through a transmission assembly;
a pair of sleeve frames 13 are fixed on the test bench 11, a first connecting pipe 14 and a second connecting pipe 15 are fixedly sleeved on the sleeve frames 13 respectively, a water pump 12 is fixed on one side of the water tank 10, the water pump 12 is communicated with the first connecting pipe 14 through a first hose 16, the water inlet end of the water pump 12 is communicated with the water tank 10, and the second connecting pipe 15 is communicated with the water tank 10 through a second hose 17.
Preferably, the fixed plate is fixed with first balladeur train and second balladeur train, fixing base sliding connection on first balladeur train, testboard sliding connection on the second balladeur train, and drive assembly is including fixing the motor on the fixed plate, and motor output shaft has the cam that is located the fixing base below.
Preferably, the transmission assembly comprises two positioning columns which are respectively fixed at the front ends of the fixed seat and the test bench, a first shaft rod is fixed on the fixed plate, a balance rod is connected on the first shaft rod in a rotating mode, and the two positioning columns penetrate through sliding openings on the balance rod.
Preferably, the transmission assembly comprises a first rack and a second rack which are respectively fixed at the adjacent ends of the fixed seat and the test bench, a second shaft is fixed on the fixed plate, a double-sided gear ring is rotationally connected on the second shaft, and the double-sided gear ring is in meshed connection with the first rack and the second rack.
Preferably, the transmission assembly comprises two connecting rods which are respectively and rotatably connected to adjacent ends of the fixing seat and the test bench, a third shaft lever is fixed on the fixing plate, a main rod is rotatably connected to the third shaft lever, and two ends of the main rod are respectively and rotatably connected with the connecting rods.
Preferably, the below of fixing base is provided with adjusting part, and adjusting part is including fixing the sliding sleeve of the U-shaped on the fixed plate, inserts on the sliding sleeve and is equipped with a pair of slide bar, and the top of two slide bars is fixed with same buffer assembly, and buffer assembly includes a pair of backing plate that distributes from top to bottom, through a pair of spring coupling between two backing plates, is equipped with a pair of guide post on the backing plate that is located the top, and the guide post passes from the guiding hole on another backing plate, and threaded connection has the screw on the sliding sleeve, and the screw rotates with the backing plate of below to be connected.
Compared with the prior art, the invention provides the pulsation damper and the testing device thereof, which have the following beneficial effects:
1. a pulsation damper and a testing device thereof are provided, the damper is installed on a pipeline through the energy storage structure, water enters the heat insulation cover from the water inlet pipe and then enters the shell through the mushroom valve, the water flow is impacted on the energy storage structure and then flows out of the water outlet pipe, so that the vibration of the pipeline is eliminated, and the change of the water flow pressure can be intuitively judged through the pointer change range on the barometer.
2. A pulsation damper and a testing device thereof are provided, an air bag is arranged to be an energy storage structure, water flow is impacted on the air bag to extrude the air bag, and kinetic energy of the water flow is converted into heat energy.
3. A pulsation damper and a testing device thereof are provided, wherein a diaphragm is arranged to be an energy storage structure, water flow is impacted on the diaphragm to extrude the diaphragm, and kinetic energy of the water flow is converted into heat energy.
4. A pulsation damper and a testing device thereof are provided, water in the water tank circularly flows at the damper through the water tank and the testing plate which can move up and down, the water tank reciprocates in the vertical direction under the action of a driving component and drives a testing table to reciprocate in the opposite direction to the water tank under the action of a transmission component, so that potential energy difference between the water tank and the damper is changed, pressure change of water flow in a water flow pipeline is caused, and a real testing environment is provided for testing the damper.
5. A pulsation damper and a testing device thereof are provided, when a fixed seat moves upwards, a balance rod is lifted upwards through a positioning column, and the other end of the balance rod presses down a testing table through the positioning column.
6. A pulsation damper and a testing device thereof are characterized in that a second transmission assembly is arranged, when a fixing seat moves upwards, a second rack is synchronously driven to move, a second rack is meshed to drive a double-sided gear ring to rotate around a second shaft, a double-sided gear ring is meshed to drive a first rack to move downwards, and the first rack is synchronously driven to drive a testing table to move downwards.
7. A pulsation damper and a testing device thereof are provided, when a fixing seat moves upwards, a main rod is pushed to rotate around a third shaft rod through a connecting rod, and then a testing table is pushed downwards through another connecting rod.
8. A pulsation damper and a testing device thereof are provided, a screw is rotated, the screw drives a buffer assembly to move upwards, the buffer assembly pushes a fixing seat and a water tank to move upwards, the distance between the fixing seat and a cam is adjusted, the distance between the water tank and the cam is adjusted, the fluctuation of water flow pressure is adjusted, and the fixing seat can be connected with the buffer assembly during falling to form buffer protection.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a pulsation damper according to the present invention;
FIG. 2 is a schematic diagram of a diaphragm mounting structure of a pulsation damper according to the present invention;
FIG. 3 is a schematic diagram of the overall structure of a pulsation damper and a testing apparatus thereof according to the present invention;
fig. 4 is a schematic diagram of a water tank installation structure of a pulsation damper and a testing device thereof according to the present invention;
FIG. 5 is a schematic diagram of a test bench of a pulsation damper and a test apparatus thereof according to the present invention;
FIG. 6 is a schematic diagram of a second driving assembly of a pulsation damper and a testing apparatus thereof according to the present invention;
FIG. 7 is a schematic diagram illustrating a third driving assembly of a pulsation damper and a testing apparatus thereof according to the present invention;
fig. 8 is a schematic structural diagram of an adjusting assembly of a pulsation damper and a testing apparatus thereof according to the present invention.
In the figure: 1. a thermal insulation cover; 2. a gland; 3. a shell; 4. a barometer; 5. a base; 6. a mushroom valve; 7. an air bag; 8. a membrane; 9. a fixing plate; 10. a water tank; 11. a test bench; 12. a water pump; 13. a sleeve frame; 14. a first connection pipe; 15. a second connection pipe; 16. a first hose; 17. a second hose; 18. a first carriage; 19. a fixing seat; 20. a second carriage; 21. a motor; 22. a cam; 23. positioning columns; 24. a third shaft; 25. a first shaft; 26. a balance bar; 27. a first rack; 28. a second rack; 29. a second shaft; 30. double-sided gear ring; 31. a main rod; 32. a connecting rod; 33. a backing plate; 34. a spring; 35. a sliding sleeve; 36. a slide bar; 37. a screw; 38. a guide post; 39. and a guide hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 8, a pulsation damper comprises a heat insulation cover 1 with a water inlet pipe and a water outlet pipe, a base 5 is fixed at the bottom of the heat insulation cover 1, a gland 2 and a shell 3 which are fixed together are installed at the top of the heat insulation cover 1, a barometer 4 is installed at the top of the gland 2, an energy storage structure which is installed on the gland 2 and is communicated with the barometer 4 is arranged in the shell 3, a mushroom valve 6 is installed at the bottom end of the shell 3, the damper is installed on a pipeline, water enters the heat insulation cover 1 from the water inlet pipe, then enters the shell 3 through the mushroom valve 6, water flows to the energy storage structure and then flows out from the water outlet pipe, so that the vibration of the pipeline is eliminated, and the change of the water flow pressure can be intuitively judged through the pointer change range on the barometer 4.
Further, the energy storage structure is an air bag 7, water flow impacts the air bag 7, the air bag 7 is extruded, and kinetic energy of the water flow is converted into heat energy.
Further, the energy storage structure is a membrane 8, an air chamber communicated with the barometer 4 is formed between the membrane 8 and the gland 2, water flow impacts the membrane 8 to extrude the membrane 8, and kinetic energy of the water flow is converted into heat energy.
The utility model provides a pulsation damper testing arrangement, including fixed plate 9, be provided with fixing base 19 that can reciprocate and be used for installing the testboard 11 of attenuator on the fixed plate 9, water tank 10 is fixed on fixing base 19, form closed loop between water tank 10 and the attenuator, fixing base 19 carries out vertical direction's reciprocating motion under drive assembly's effect, fixing base 19 drives testboard 11 through drive assembly carries out reciprocating motion opposite to water tank 10 direction, thereby change the potential energy difference between water tank 10 and the attenuator, the pressure variation of rivers in the initiation rivers pipeline, thereby provide real test environment for the test of attenuator;
further, a pair of sleeves 13 are fixed on the test bench 11, a first connecting pipe 14 and a second connecting pipe 15 are fixedly sleeved on the sleeves 13 respectively, a water pump 12 is fixed on one side of the water tank 10, the water pump 12 is communicated with the first connecting pipe 14 through a first hose 16, the water inlet end of the water pump 12 is communicated with the water tank 10, the second connecting pipe 15 is communicated with the water tank 10 through a second hose 17, the water inlet pipe and the water outlet pipe of the damper are respectively fixed on the first connecting pipe 14 and the second connecting pipe 15, the water pump 12 pumps water in the water tank 10 into the first hose 16, then flows into the damper through the first connecting pipe 14, flows into the second hose 17 through the second connecting pipe 15, and finally flows back into the water tank 10.
Further, a first carriage 18 and a second carriage 20 are fixed on the fixed plate 9, the fixed seat 19 is slidably connected to the first carriage 18, the test board 11 is slidably connected to the second carriage 20, the driving assembly comprises a motor 21 fixed on the fixed plate 9, an output shaft of the motor 21 is connected with a cam 22 positioned below the fixed seat 19, the motor 21 is started, the output shaft of the motor 21 drives the cam 22 to rotate, the cam 22 periodically lifts the fixed seat 19 upwards, the fixed seat 19 and the water tank 10 move upwards along the first carriage 18 together, and the damper and the test board 11 move downwards along the second carriage 20 together through the transmission assembly, and after the cam 22 is separated from the fixed seat 19, the water tank 10 and the damper move reversely again.
Further, the transmission assembly comprises two positioning columns 23 which are respectively fixed at the front ends of the fixed seat 19 and the test bench 11, a first shaft lever 25 is fixed on the fixed plate 9, a balance rod 26 is connected to the first shaft lever 25 in a rotating mode, the two positioning columns 23 penetrate through sliding openings on the balance rod 26, when the fixed seat 19 moves upwards, the balance rod 26 is lifted upwards through the positioning columns 23, and the other end of the balance rod 26 presses the test bench 11 downwards through the positioning columns 23.
Further, the transmission assembly comprises a first rack 27 and a second rack 28 which are respectively fixed at the adjacent ends of the fixed seat 19 and the test bench 11, a second shaft 29 is fixed on the fixed plate 9, a double-sided gear ring 30 is rotationally connected to the second shaft 29, the double-sided gear ring 30 is in meshed connection with the first rack 27 and the second rack 28, when the fixed seat 19 moves upwards, the second rack 28 is synchronously driven to move, the second rack 28 is meshed to drive the double-sided gear ring 30 to rotate around the second shaft 29, the double-sided gear ring 30 is meshed to drive the first rack 27 to move downwards, and the first rack 27 is synchronously driven to drive the test bench 11 to move downwards.
Further, the transmission assembly comprises two connecting rods 32 which are respectively and rotatably connected to the fixing seat 19 and the adjacent end of the test bench 11, a third shaft lever 24 is fixed on the fixing plate 9, a main rod 31 is rotatably connected to the third shaft lever 24, two ends of the main rod 31 are respectively and rotatably connected with the connecting rods 32, when the fixing seat 19 moves upwards, the main rod 31 is pushed to rotate around the third shaft lever 24 through the connecting rods 32, and then the test bench 11 is pushed downwards through the other connecting rods 32.
Further, an adjusting component is arranged below the fixed seat 19, the adjusting component comprises a U-shaped sliding sleeve 35 fixed on the fixed plate 9, a pair of sliding rods 36 are inserted into the sliding sleeve 35, the top ends of the two sliding rods 36 are fixed with the same buffer component, the buffer component comprises a pair of base plates 33 which are distributed up and down, the two base plates 33 are connected through a pair of springs 34, a pair of guide posts 38 are arranged on the base plate 33 positioned above, the guide posts 38 penetrate through guide holes 39 on the other base plate 33, a screw rod 37 is connected to the sliding sleeve 35 in a threaded manner, the screw rod 37 is rotationally connected with the base plate 33 below, the screw rod 37 rotates, the screw rod 37 drives the buffer component to move upwards, the buffer component pushes the fixed seat 19 and the water tank 10 to move upwards, so as to adjust the distance between the fixed seat 19 and the cam 22, the distance when the water tank 10 moves upwards is adjusted, the fluctuation size of water flow pressure is adjusted, and the fixed seat 19 can be received when falling down through the buffer component, so that buffer protection is formed.
Working principle of pulsation damper: install the pipeline with the attenuator, water gets into in the heat preservation cover 1 from the inlet tube, then in getting into shell 3 through fungus shape valve 6, the rivers strike on gasbag 7, form the extrusion to gasbag 7, turn into the heat energy with the kinetic energy of rivers, follow the outlet pipe and flow out to eliminate the pipeline vibration, can audio-visual judgement rivers pressure variation through the pointer variation range on the barometer 4.
Working principle of pulsation damper testing device: the water inlet pipe and the water outlet pipe of the damper are respectively fixed on the first connecting pipe 14 and the second connecting pipe 15, the water pump 12 pumps the water in the water tank 10 into the first hose 16, then flows into the damper through the first connecting pipe 14, flows into the second hose 17 through the second connecting pipe 15 and finally flows back into the water tank 10, the motor 21 is started, the output shaft of the motor 21 drives the cam 22 to rotate, the cam 22 periodically lifts the fixed seat 19 upwards, the fixed seat 19 and the water tank 10 move upwards along the first carriage 18 together, the damper and the test bench 11 move downwards along the second carriage 20 together through the transmission component, and after the cam 22 is separated from the fixed seat 19, the water tank 10 and the damper move reversely again, so that potential energy difference between the water tank 10 and the damper is changed, and pressure change of water flow in the water flow pipeline is induced;
the screw rod 37 is rotated, the screw rod 37 drives the buffer assembly to move upwards, and the buffer assembly pushes the fixing seat 19 and the water tank 10 to move upwards, so that the distance between the fixing seat 19 and the cam 22 is adjusted, the distance when the water tank 10 moves upwards is adjusted, the fluctuation of water flow pressure is adjusted, and the fixing seat 19 during falling can be received through the buffer assembly, so that buffer protection is formed.
The three modes of operation of the transmission assembly are as follows:
firstly, when the fixed seat 19 moves upwards, the balance bar 26 is lifted upwards through the positioning column 23, and the other end of the balance bar 26 presses down the test bench 11 through the positioning column 23;
secondly, when the fixed seat 19 moves upwards, the second rack 28 is synchronously driven to move, the second rack 28 is meshed to drive the double-sided gear ring 30 to rotate around the second shaft 29, the double-sided gear ring 30 is meshed to drive the first rack 27 to move downwards, and the first rack 27 synchronously drives the test bench 11 to move downwards;
third, when the fixing base 19 moves upward, the main lever 31 is pushed by the link lever 32 to rotate around the third shaft lever 24, and then the test stand 11 is pushed downward by the other link lever 32.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The pulsation damper testing device is characterized by comprising a fixed plate (9), wherein a fixed seat (19) capable of moving up and down and a test board (11) for installing a damper are arranged on the fixed plate (9), a water tank (10) is fixed on the fixed seat (19), a closed loop is formed between the water tank (10) and the damper, the fixed seat (19) moves in a reciprocating manner in the vertical direction under the action of a driving assembly, and the fixed seat (19) drives the test board (11) to move in a reciprocating manner opposite to the water tank (10) through the driving assembly;
a pair of sleeve frames (13) are fixed on the test bench (11), a first connecting pipe (14) and a second connecting pipe (15) are fixedly sleeved on the sleeve frames (13) respectively, a water pump (12) is fixed on one side of the water tank (10), the water pump (12) is communicated with the first connecting pipe (14) through a first hose (16), the water inlet end of the water pump (12) is communicated with the water tank (10), and the second connecting pipe (15) is communicated with the water tank (10) through a second hose (17).
2. A pulsation damper testing device according to claim 1, characterized in that the fixed plate (9) is fixed with a first carriage (18) and a second carriage (20), the fixed seat (19) is slidably connected to the first carriage (18), the test bench (11) is slidably connected to the second carriage (20), the drive assembly comprises a motor (21) fixed to the fixed plate (9), and the output shaft of the motor (21) is connected with a cam (22) located below the fixed seat (19).
3. The pulsation damper testing device according to claim 1, wherein the transmission assembly comprises two positioning columns (23) fixed at the front ends of the fixed seat (19) and the test bench (11) respectively, a first shaft lever (25) is fixed on the fixed plate (9), a balance rod (26) is rotatably connected on the first shaft lever (25), and the two positioning columns (23) pass through sliding openings on the balance rod (26).
4. The pulsation damper testing device according to claim 1, wherein the transmission assembly comprises a first rack (27) and a second rack (28) which are respectively fixed at adjacent ends of the fixed seat (19) and the test bench (11), a second shaft (29) is fixed on the fixed plate (9), a double-sided gear ring (30) is rotatably connected on the second shaft (29), and the double-sided gear ring (30) is in meshed connection with the first rack (27) and the second rack (28).
5. The pulsation damper testing device according to claim 1, wherein the transmission assembly comprises two connecting rods (32) rotatably connected to adjacent ends of the fixing seat (19) and the testing table (11), a third shaft rod (24) is fixed on the fixing plate (9), a main rod (31) is rotatably connected to the third shaft rod (24), and two ends of the main rod (31) are rotatably connected to the connecting rods (32).
6. The pulsation damper testing device according to claim 2, wherein an adjusting component is arranged below the fixed seat (19), the adjusting component comprises a U-shaped sliding sleeve (35) fixed on the fixed plate (9), a pair of sliding rods (36) are inserted on the sliding sleeve (35), the top ends of the two sliding rods (36) are fixed with the same buffer component, the buffer component comprises a pair of base plates (33) which are distributed up and down, the two base plates (33) are connected through a pair of springs (34), a pair of guide posts (38) are arranged on the base plate (33) above, the guide posts (38) penetrate through guide holes (39) on the other base plate (33), a screw rod (37) is connected to the sliding sleeve (35) in a threaded mode, and the screw rod (37) is connected with the base plate (33) below in a rotating mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410103134.XA CN117628308B (en) | 2024-01-25 | 2024-01-25 | Pulsation damper and testing device thereof |
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| CN202410103134.XA CN117628308B (en) | 2024-01-25 | 2024-01-25 | Pulsation damper and testing device thereof |
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| CN117628308B true CN117628308B (en) | 2024-04-09 |
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| JPS6473232A (en) * | 1987-09-14 | 1989-03-17 | Nobuyuki Sugimura | Measurement of gas sealing pressure for accumulator |
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| JP2003315146A (en) * | 2002-04-26 | 2003-11-06 | Hitachi Ltd | Monitoring method and device for pump vibration |
| CN2773456Y (en) * | 2005-01-21 | 2006-04-19 | 张荣初 | Acoustic energy-absorber |
| KR200389340Y1 (en) * | 2005-02-23 | 2005-07-14 | 삼성중공업 주식회사 | Impact water pressure testing apparatus for building equipment's pipe laying |
| CN201014133Y (en) * | 2007-01-24 | 2008-01-30 | 深圳市全鼎机电有限公司 | On-line noise deadener |
| CN102269235A (en) * | 2011-05-04 | 2011-12-07 | 江苏大学 | Magneto-rheological fluid (MRF) damper based pressure fluctuation self-adjusting system and adjusting method |
| CN104373741A (en) * | 2014-10-14 | 2015-02-25 | 上海大隆机器厂有限公司 | Low-pulsation series capsule type buffer |
| CN210876010U (en) * | 2019-10-08 | 2020-06-30 | 肖家伟 | Water flow fluctuation device |
| CN111296245A (en) * | 2020-04-09 | 2020-06-19 | 南京绿源达农业设备有限公司 | A irrigation equipment for farming has a pressure regulating function |
| CN213804779U (en) * | 2020-10-18 | 2021-07-27 | 郑德粮 | High efficiency road surface roughness detection device |
| CN214466984U (en) * | 2021-02-05 | 2021-10-22 | 日照市恒通水处理设备有限公司 | Screen plate type air bag buffer |
| KR20230089267A (en) * | 2021-12-13 | 2023-06-20 | 엘아이지넥스원 주식회사 | Apparatus for testing drainage and testing drainage system using the same |
| CN218719669U (en) * | 2022-06-17 | 2023-03-24 | 青岛科奥仪表制造有限公司 | Anti-seismic pulse pressure-resistant safety pressure gauge |
| CN219299264U (en) * | 2023-03-22 | 2023-07-04 | 陕西韬响石油科技有限责任公司 | Underground low-frequency hydraulic pulsation generating device with built-in pipe column |
| CN219529677U (en) * | 2023-04-19 | 2023-08-15 | 赵庆羽 | Multi-cavity damper with multi-stage pressure setting |
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