CN101915700A - Non-outflow type gas pressure/volume control device - Google Patents
Non-outflow type gas pressure/volume control device Download PDFInfo
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- CN101915700A CN101915700A CN 201010242102 CN201010242102A CN101915700A CN 101915700 A CN101915700 A CN 101915700A CN 201010242102 CN201010242102 CN 201010242102 CN 201010242102 A CN201010242102 A CN 201010242102A CN 101915700 A CN101915700 A CN 101915700A
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- 238000007789 sealing Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
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- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 239000002689 soil Substances 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000011089 mechanical engineering Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention discloses a non-outflow type gas pressure/volume control device, in particular to a device for controlling gas pressure and detecting volume change, which belongs to the technical field of mechanical-engineering testing and relates to a soil-mechanical triaxial test. The non-outflow type gas pressure/volume control device is characterized by comprising a pair of reducing servo motors, a ball screw, a main cylinder, a pressure retaining cylinder, a gas pressure transducer, a linear scale, a monitoring and controlling unit, and the like. In the device, a tiny cavity is formed at the position of a piston of the main cylinder by using a piston baffle, and the cavity and the pressure cavities of the cylinders are filled with air with equal pressure so as to make the pressure difference between the two ends of the piston very small, thereby realizing 'zero leakage' in theory and solving the problem of gas leakage well; and the linear displacement of the piston of the main cylinder is measured by a displacement transducer of the linear scale so as to calculate the change of gas volume in the cylinder and realize the detection on the volume of constant pressure gas adsorbed in soil samples. The device has the advantages of realizing 'zero leakage' in theory, along with light structure, low cost and reasonable overall design.
Description
Technical field
The invention belongs to the Measurement Techniques of Mechanic Engineering field, relate to the soil mechanics triaxial test, the device that especially a kind of gaseous tension control and volume change detect.
Background technology
The intensity of measured soil and distortion and often use triaxial tester, this instrument application is extensive, can be used for measuring multiple parameter, comprises shear strength characteristics, fixed characteristics and soil permeability.Its major function equipment comprises the control of principle stress size, the measurement of draining control and pore pressure.And gaseous tension/volume control device is an important ingredient of three experimental systems.Generally speaking, finish once experiment for up to tens hours even a couple of days, to keep the pressure stability of gaseous tension/volume control device on the one hand, to detect on the other hand because the volume of soil sample absorption Continuous pressure-controlled air inflation.The detection of the absorption Continuous pressure-controlled air inflation volume of soil sample is very difficult.
At present, the domestic Related product that does not also have gaseous tension/volume control device.Having only external GDS company to have the product of moulding, this product to finish the detection that gas volume changes realizes by insert custom-designed sensor in output pipe.This sensor is the patent that GDS company has, and measuring accuracy is not too high, costs an arm and a leg and externally do not sell to be difficult to buy on market.If do not adopt the detection volume change sensor can only detect the volume of adsorption by soil Continuous pressure-controlled air inflation indirectly by the variation of the cavity volume of pressure/volume control device own.For the accuracy that ensures testing result must guarantee that pressure/volume control device is air tight, sealing just will be got well.The pneumatic circuit link remains static usually, and its leakage can be ignored, and leaks sealing place that mainly occurs in the device moving component.For the influence that reduces leakage strengthens the thickness of moving component place O-ring seal usually, this brings difficulty to installation on the one hand, and the effect of nonlinear that rubs on the other hand increases, and this can reduce the control accuracy of pressure.
Summary of the invention
The objective of the invention is to solve the problem of moving component sealing, realize the control of gaseous tension and the detection of gas volume change.This device is made up of master cylinder subsystem and pressurize cylinder subsystem two parts, and the master cylinder subsystem is used to produce certain pressure, and pressurize cylinder subsystem plays auxiliary pressurize effect.Under the prerequisite that does not increase O-ring seal thickness, designed a kind of novel sealing structure, form small die cavity with a piston baffle and master cylinder piston, and utilize pressurize cylinder subsystem in die cavity, to charge into the air that equates with the master cylinder pressure cavity pressure, make that the draught head at piston two ends is very little, realized " zero reveals " theoretically, so just solved the problem that moving component gas leaks well.This device selects for use high precision baroceptor and servomotor to guarantee the observing and controlling precision of cylinder internal gas pressure, measures the variation that the gas in the jar volume is calculated in the master cylinder piston displacement with the grating rule displacement sensor, thereby obtains the volume of soil sample absorption Continuous pressure-controlled air inflation.
The technical solution used in the present invention is: a kind of non-outflow type gas pressure power/volume control device is by master cylinder lid I 3, base plate 4, master cylinder piston 5, piston baffle 6, piston rod 7, master cylinder lid II 8, bearing seat 11, grating chi 13, ball-screw 14, connecting rod 17, push pedal 19, guide rail 20, ball-screw 22, pressurize cylinder head I 23, pressurize cylinder piston 26, O type rubber seal 27, pressurize cylinder 28, O type rubber seal 29, pressurize cylinder cover II 30, master cylinder 31, back-up block I 33, back-up block II 34, deceleration servomotor 36, general flat key 37, shaft coupling 38, deep groove ball bearing 41, motor cabinet 43, track base 44, pipe adapter 46, baroceptor 47 compositions such as grade.Wherein, guide rail 20 lower ends of pressurize cylinder are fixed on the back-up block II 34, the bearing seat lower end at ball-screw 14 two ends is fixed on the back-up block I 33, deceleration servomotor 36 lower ends of master cylinder have a back-up block II 34 equally, make transmission central axis and its corresponding cylinder central axes of deceleration servomotor 36, guide rail 20, ball-screw 14 thus; Nut one end of ball-screw 14 is connecting push pedal 19 by hexagon socket cap head screw, master cylinder piston bar 7 is by being threaded in push pedal 19, fastening with nut, push pedal 19 1 sides are connected on the grating chi 13 by connecting rod, and grating chi 13 is fixed on the base plate 4 by hexagon socket cap head screw; Master cylinder 31 two ends are separately fixed on master cylinder lid I 3 and the master cylinder lid II 8, clip O type rubber seal between the three, play sealing function; Piston baffle 6 is equipped with at 5 rear end face 5mm places apart from master cylinder piston, cooperates a pipe adapter on the piston baffle 6, is connected with the output pressure pipe of pressurize cylinder, adopts crush seal between master cylinder piston 5 and piston baffle 6 and the master cylinder 31; The motor cabinet 43 of the deceleration servomotor 36 of pressurize cylinder 28 is connected and fixed by the track base 44 of 4 hexagon head bolts 42 and nut 45 and guide rail 20; The output shaft of deceleration servomotor 36 is connected by positive coupling 38 with ball-screw 22 with ball-screw 14, locatees with general flat key 37 between axle and the shaft coupling 38; Nut one end of ball-screw 22 and pressurize cylinder head I 23 are fixing by 4 hexagon head bolts 25; Pressurize cylinder 28 is fixed on pressurize cylinder head I 23, the pressurize cylinder cover II 30, and 29 sealings of O type rubber seal are arranged between the three; Seal with O type rubber seal 27 between pressurize cylinder 28 and the pressurize cylinder piston 26; Master cylinder 31 all is installed with baroceptor 47 with the upper end of pressurize cylinder 28.
Effect of the present invention and benefit are: designed a piston baffle at the master cylinder piston connecting-rod head, the seal request of baffle plate is identical with master cylinder piston.A pipe adapter is installed in punching on baffle plate, has so just formed a small die cavity between piston and baffle plate.This die cavity has played the effect of leaking of preventing, realizes " zero leakage " of gas in theory; High precision baroceptor that this device is selected for use and servomotor have guaranteed the observing and controlling precision of cylinder internal gas pressure, measure the variation that the gas in the jar volume is calculated in the master cylinder piston displacement with the grating rule displacement sensor, and unidirectional pressurization hysterisis error can be ignored.This apparatus structure dexterity, rationally distributed, measuring accuracy is high, has good and economic.
Description of drawings
Fig. 1 is a kind of non-outflow type gas pressure power/volume control device plan structure synoptic diagram.
Among the figure: 1 nut M8; 2 studs; 3 master cylinders lid I; 4 base plates; 5 master cylinder pistons; 6 piston baffles; 7 piston rods; 8 master cylinders lid II; 9 hexagon socket cap head screw M8; 10 hexagon socket cap head screw M12; 11 bearing seats; 12 hexagon socket cap head screw M4; 13LIP372-270 type grating chi; 14 ball-screws; 15 hexagon socket cap head screw M4; 16 hexagon socket cap head screw M4; 17 connecting rods; 18 hexagon head bolt M6; 19 push pedals; 20 guide rails; 21 hexagon socket cap head screw screw M2; 22 ball-screws; 23 pressurize cylinder head I; 24 hexagon socket cap head screw M8; 25 hexagon head bolt M8; 26 pressurize cylinder pistons; 27O type rubber seal; 28 pressurize cylinders; 29O type rubber seal; 30 pressurize cylinder cover II; 31 master cylinders.
Fig. 2 is that this device is faced structural representation.
Among the figure: 32 nut M12; 33 back-up block I; 34 back-up block II; 35 hexagon socket cap head screw M10; 36 deceleration servomotors; 37 general flat keys; 38 shaft couplings; 39 nut M4; 40 hexagon socket cap head screw M4; 41 deep groove ball bearings.
Fig. 3 is that this installs left TV structure synoptic diagram.
Among the figure: 42 hexagon head bolt M10; 43 motor cabinets; 44 track bases; 45 nut M10; 46 pipe adapters; 47 baroceptors.
Fig. 4 is a master cylinder piston modular construction synoptic diagram.
Among the figure: piston component has a small die cavity, utilizes the pressurize cylinder to charge into the air that equates with the master cylinder pressure cavity pressure in die cavity, makes that the draught head at piston two ends is very little, has realized " zero reveals " theoretically.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
Shown in accompanying drawing 1～4, part cleans with kerosene during assembling, dries back matching surface oiling, and each part not finished surface should clean up, and removes burr, the applying preventive by dipping lacquer; To guarantee during assembling that assembly surface does not have cut; When the deceleration servomotor 36 of assembling back master cylinder 31 turns round, the leading screw that drives ball-screw 14 rotates, because the push pedal 19 that nut back end connects is connected with grating chi 13 by connecting rod 17, push pedal 19 will be moved by straight line, driving the master cylinder piston bar 7 that is fixed on the baffle plate downside thus moves, master cylinder piston 5 is moved, and the gas in the compression master cylinder 31 produces pressure; Meanwhile, the deceleration servomotor 36 of pressurize cylinder 28 is also in running, because the nut guide effect that ball-screw 22 is fixed, deceleration servomotor 36 can slide along guide rail 20, promoting the pressurize cylinder piston rod moves forward, gas in the pressurize cylinder piston 26 extruding pressurize cylinders 28 produces pressure, and the pipe adapter 46 of pressurize cylinder 28 is linked the pipe adapter on the piston baffle 6 of master cylinder 31 by pneumatic tube; Between piston 5 and baffle plate 6, formed a small die cavity, this die cavity has played the effect that guarantees that cylinder pressure is stable and prevent to leak, its principle of work is when master cylinder 31 work pressurizations, pressurize cylinder 28 is simultaneously also in pressurization and make pressurize cylinder 28 identical with air pressure in the master cylinder 31, and the pipe adapter on the baffle plate 6 links to each other with the gas out splice going splice of pressurize cylinder 28.The draught head of master cylinder piston 5 both sides is very little like this, adds the effect that O-ring seal plays, and can ignore so the gas of master cylinder 31 leaks.So just guarantee the stability of atmospheric pressure value in process of the test in the master cylinder 31, thereby guaranteed the effect of experiment.
When the pressure of tested gas in the cylinder reduces or raise, the sensing element of baroceptor 47 is nursed one's health into the signal voltage of 0-5V, conversion is received by data acquisition unit through A/D, data acquisition unit sends the result to computing machine then, realize the collection and the control of pressure, the pressurize cylinder is identical with the control method of master cylinder.
Unique collocation structure that this gaseous tension volume control device designs aspect cylinder seal has been realized theoretic " zero leakage ", and the frictional resistance influence is little; The high precision baroceptor that this device is selected for use has guaranteed the measuring accuracy of cylinder internal gas pressure; Measure straight-line displacement with the grating rule displacement sensor, and be scaled the gas in the jar volume by formula, the grating rule displacement sensor accuracy class of this device is up to ± 0.5 μ m, than the volume change measuring accuracy height of external product.In addition, this control device structure is simple and direct, easy to operate, and low cost of manufacture has very high economy.
Claims (1)
1. a non-outflow type gas pressure power/volume control device covers I (3), base plate (4) by master cylinder, master cylinder piston (5), piston baffle (6), piston rod (7), master cylinder lid II (8), bearing seat (11), grating chi (13), ball-screw (14), connecting rod (17), push pedal (19), guide rail (20), ball-screw (22), pressurize cylinder head I (23), pressurize cylinder piston (26), O type rubber seal (27), pressurize cylinder (28), O type rubber seal (29), pressurize cylinder cover II (30), master cylinder (31), back-up block I (33), back-up block II (34), reducing motor (36), general flat key (37), shaft coupling (38), deep groove ball bearing (41), motor cabinet (43), track base (44), pipe adapter (46), baroceptor (47) is formed;
It is characterized in that: the guide rail of pressurize cylinder (20) lower end is fixed on the back-up block II (34), the bearing seat lower end at ball-screw (14) two ends is fixed on the back-up block I (33), the reducing motor of master cylinder (36) lower end has a back-up block II (34) equally, makes transmission central axis and its corresponding cylinder central axes of reducing motor (36), guide rail (20), ball-screw (14) thus; Nut one end of ball-screw (14) is connecting push pedal (19) by hexagon socket cap head screw, master cylinder piston bar (7) is by being threaded in push pedal (19), fastening with nut, push pedal (19) one sides are connected on the grating chi (13) by connecting rod, and grating chi (13) is fixed on the base plate (4) by hexagon socket cap head screw; Master cylinder (31) two ends are separately fixed on master cylinder lid I (3) and the master cylinder lid II (8), clip O type rubber seal between the three, play sealing function; Apart from master cylinder piston (5) rear end face 5mm place piston baffle (6) is housed, piston baffle (6) is gone up and is cooperated a pipe adapter, be connected with the output pressure pipe of pressurize cylinder, utilize the pressurize cylinder charge into the cylinder pressure chamber in the air of uniform pressure, adopt crush seal between master cylinder piston (5) and piston baffle (6) and the master cylinder (31); The motor cabinet (43) of the reducing motor (36) of pressurize cylinder (28) is connected and fixed by the track base (44) of 4 hexagon head bolts (42) and nut (45) and guide rail (20); The output shaft of reducing motor (36) is connected by positive coupling (38) with ball-screw (22) with ball-screw (14), locatees with general flat key (37) between axle and the shaft coupling (38); Nut one end of ball-screw (22) and pressurize cylinder head I (23) are fixing by 4 hexagon head bolts (26); Pressurize cylinder (28) is fixed on pressurize cylinder head I (23), the pressurize cylinder cover II (30), and O type rubber seal (29) sealing is arranged between the three; Seal with O type rubber seal (27) between pressurize cylinder (28) and the pressurize cylinder piston (26); Master cylinder (31) all is installed with baroceptor (47) with the upper end of pressurize cylinder (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102421026A CN101915700B (en) | 2010-07-29 | 2010-07-29 | Non-outflow type gas pressure/volume control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102421026A CN101915700B (en) | 2010-07-29 | 2010-07-29 | Non-outflow type gas pressure/volume control device |
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| CN101915700A true CN101915700A (en) | 2010-12-15 |
| CN101915700B CN101915700B (en) | 2012-09-05 |
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| CN2010102421026A Expired - Fee Related CN101915700B (en) | 2010-07-29 | 2010-07-29 | Non-outflow type gas pressure/volume control device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123042A (en) * | 2013-02-05 | 2013-05-29 | 上海大学 | Variable air-capacitor device |
| CN103994109A (en) * | 2014-04-22 | 2014-08-20 | 清华大学深圳研究生院 | Hydraulic device capable of being used for measuring volume |
| CN105223976A (en) * | 2015-10-30 | 2016-01-06 | 南通市飞宇石油科技开发有限公司 | A kind of pressure regulation control system |
| CN105865608A (en) * | 2016-06-13 | 2016-08-17 | 陕西理工学院 | Full-automatic quadrangle calibration system for weighing sensors |
| CN106370875A (en) * | 2016-11-02 | 2017-02-01 | 南京泰克奥科技有限公司 | Pressure volume controller |
| CN109387326A (en) * | 2018-12-10 | 2019-02-26 | 南京工程学院 | The fast tune servomechanism installation of air pressure in a kind of confined space |
| CN110118629A (en) * | 2019-05-31 | 2019-08-13 | 辽宁红沿河核电有限公司 | A kind of nuclear power station atmospheric pressure measurement device |
| CN112881172A (en) * | 2021-01-19 | 2021-06-01 | 西南交通大学 | Well rate of strain loading device |
| CN113740212A (en) * | 2021-08-26 | 2021-12-03 | 西南交通大学 | Apparatus, system and method for studying nucleation and growth of particles in wet granulation |
| CN114041948A (en) * | 2021-11-12 | 2022-02-15 | 皮宁 | Intelligent concentration adjustment type anesthesia device for anesthesia department |
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| CN1319812A (en) * | 2001-04-04 | 2001-10-31 | 大连理工大学 | Digital image measuring method and equipment of triaxle testing sample soil deformation |
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-
2010
- 2010-07-29 CN CN2010102421026A patent/CN101915700B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987005107A1 (en) * | 1986-02-24 | 1987-08-27 | Steven John Dougherty | Apparatus for measuring entrained gas phase content |
| CN2294992Y (en) * | 1997-03-11 | 1998-10-21 | 中国人民解放军空军工程设计研究局 | Soil-sample concretion data collecting system |
| CN1319812A (en) * | 2001-04-04 | 2001-10-31 | 大连理工大学 | Digital image measuring method and equipment of triaxle testing sample soil deformation |
| CN101762433A (en) * | 2009-12-29 | 2010-06-30 | 长安大学 | Pneumatic base material washout tester |
Non-Patent Citations (1)
| Title |
|---|
| 《大连理工大学学报》 20100331 桑勇等 "动静三轴试验仪"伺服加载***研究 1 第50卷, 第2期 2 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123042A (en) * | 2013-02-05 | 2013-05-29 | 上海大学 | Variable air-capacitor device |
| CN103994109A (en) * | 2014-04-22 | 2014-08-20 | 清华大学深圳研究生院 | Hydraulic device capable of being used for measuring volume |
| CN105223976A (en) * | 2015-10-30 | 2016-01-06 | 南通市飞宇石油科技开发有限公司 | A kind of pressure regulation control system |
| CN105865608A (en) * | 2016-06-13 | 2016-08-17 | 陕西理工学院 | Full-automatic quadrangle calibration system for weighing sensors |
| CN106370875A (en) * | 2016-11-02 | 2017-02-01 | 南京泰克奥科技有限公司 | Pressure volume controller |
| CN109387326A (en) * | 2018-12-10 | 2019-02-26 | 南京工程学院 | The fast tune servomechanism installation of air pressure in a kind of confined space |
| CN109387326B (en) * | 2018-12-10 | 2023-08-25 | 南京工程学院 | Quick-adjusting servo device for air pressure in closed space |
| CN110118629A (en) * | 2019-05-31 | 2019-08-13 | 辽宁红沿河核电有限公司 | A kind of nuclear power station atmospheric pressure measurement device |
| CN112881172A (en) * | 2021-01-19 | 2021-06-01 | 西南交通大学 | Well rate of strain loading device |
| CN113740212A (en) * | 2021-08-26 | 2021-12-03 | 西南交通大学 | Apparatus, system and method for studying nucleation and growth of particles in wet granulation |
| CN114041948A (en) * | 2021-11-12 | 2022-02-15 | 皮宁 | Intelligent concentration adjustment type anesthesia device for anesthesia department |
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| CN101915700B (en) | 2012-09-05 |
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