CN101876621B - Gravity type constant-pressure liquid supply device - Google Patents

Gravity type constant-pressure liquid supply device Download PDF

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Publication number
CN101876621B
CN101876621B CN2009102733241A CN200910273324A CN101876621B CN 101876621 B CN101876621 B CN 101876621B CN 2009102733241 A CN2009102733241 A CN 2009102733241A CN 200910273324 A CN200910273324 A CN 200910273324A CN 101876621 B CN101876621 B CN 101876621B
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CN
China
Prior art keywords
plunger
liquid supply
pressure
support frame
valve
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CN2009102733241A
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Chinese (zh)
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CN101876621A (en
Inventor
陈善雄
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中国科学院武汉岩土力学研究所
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Publication of CN101876621A publication Critical patent/CN101876621A/en
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Abstract

The invention provides a gravity type constant-pressure liquid supply device. A plunger-type cylinder is a hollow cylindrical barrel with a bottom, and a plunger piston is a cylinder and arranged in the plunger-type cylinder. A support frame is a rectangular three-dimensional rigid frame; and the plunger-type cylinder is horizontally arranged and fixed in the centre of the upper part of the support frame by two plunger-type piston supports. A shaft sleeve base is arranged in the centre of the left end part of the plunger piston, and a shaft sleeve is arranged in the right centre of a pressure cross rod and hinged with the shaft sleeve base through a hinge pin. The left end of a lifting rope is fixed at the front and rear ends of the pressure cross rod respectively, and the right end of the lifting rope passes over a front steering fixed pulley and a rear steering fixed pulley respectively, and the bottom centre of the cross bar is connected with a weight hanging bracket. A liquid supply valve and a liquid inlet valve are arranged at the bottom of the plunger-type cylinder, the liquid supply valve is connected with a four-way piece through a liquid supply main pipe, and the four-way piece is connected with three liquid supply branch pipes with valves. The liquid inlet valve is communicated with test liquid in a liquid container through a liquid inlet pipe. The gravity type constant-pressure liquid supply device has a simple structure, is convenient to operate, can realize high-precision constant-pressure liquid supply and can used for soil infiltration tests and soil-column leaching tests.

Description

Gravity type constant-pressure liquid supply device
Technical field
The present invention relates to the experimental measurement Instrument technology field, relate in particular to a kind of gravity type constant-pressure liquid supply device, but the constant-pressure liquid supply device of a kind of pressure stability non-transformer long-term work is provided for scientific experiments such as soil seepage tests and earth pillar leaching tests.
Background technology
Hydraulic experiment is the basic physical and mechanical experiment of a class, is one of main research means of hydraulics, permeation fluid mechanics research, and the perfect constant-pressure liquid supply device of a cover is necessity equipment that carries out hydraulic experiment.
Use comparatively general liquid feed device at present and be roughly float-ball type and self-overflow type liquid feed device, be more popular liquid feed device, its function is all more single, can not satisfy the test accuracy requirement in fields such as scientific research and teaching.Mainly there is following shortcoming in traditional constant-pressure liquid supply device:
1) the feed flow ground roll of traditional float-ball type and self-overflow type liquid feed device is moving bigger, i.e. liquid supply pressure fluctuation is bigger, is difficult to satisfy the needs to the scientific experiment of liquid supply pressure stability high request.
2) for keeping constant level, must and keep overflow situation, serious waste of resources to the liquid reserve tank continuous liquid supply during experiment.
3) traditional constant-pressure liquid supply device need of work power supply, in case have a power failure, experiment will be interrupted or be discarded.
When 4) traditional constant-pressure liquid supply device was worked, the liquid reserve tank overflow certainly will cause the interference to the test liquid body, and the experiment such as the experimental projects such as flow field, Reynolds of having relatively high expectations for test liquid body homeostasis degree will have a negative impact.
5) shortage is used for the special-purpose constant-pressure liquid supply device that acid, aqueous slkali etc. have corrosive liquids at present.
Therefore, the more perfect constant-pressure liquid supply device of research and development is significant for the development that promotes hydraulics, permeation fluid mechanics.
Summary of the invention
It is bigger to the objective of the invention is to solve traditional liquid feed device liquid supply pressure fluctuation, serious waste of resources, and depend on the difficult problem of power supply, a kind of gravity type constant-pressure liquid supply device is provided.This constant-pressure liquid supply device is simple in structure, and is easy to operate, and liquid supply pressure is stable, but non-transformer long-term work, can economize on resources, can be used for the constant-pressure liquid supply of corrosive liquids such as acid, aqueous slkali, can satisfy the demand of scientific experiments such as soil seepage tests and earth pillar leaching test constant-pressure liquid supply device.
In order to achieve the above object, the present invention adopts following technical measures:
A kind of gravity type constant-pressure liquid supply device, it is by support frame, plunger case, plunger, plunger case bearing, sleeve block, pressurization whippletree, axle sleeve, bearing pin, hand winch, the capstan winch bearing, stay cord, lifting rope, feed liquor valve, feed tube, liquid container, supplying valve, precision digital hydralic pressure gauge, the feed flow house steward, four-way, the feed flow arm turns to fixed pulley, turn to the fixed pulley bearing, cross bar, weight-hanger, parts such as counterweight constitute.Its annexation is: plunger case is the band hollow circular cylinder at the end, and plunger is a right cylinder, and plunger is installed in the plunger case.Support frame is the three-dimensional rigid frame of a rectangle, and the plunger case horizontal positioned also is fixed on the support frame center upper portion by two plunger case bearings.The left part central authorities of plunger are provided with sleeve block, and the right side central authorities of pressurization whippletree are provided with axle sleeve, and axle sleeve is hinged by bearing pin and sleeve block.The left end of two lifting ropes is separately fixed at the rear and front end of pressurization whippletree, and two turned to fixed pulley before and after the right-hand member of described two lifting ropes strode across respectively, were connected with the rear and front end of cross bar then.The bottom center of described cross bar connects weight-hanger, and counterweight directly is shelved on the base plate of described weight-hanger.Described plunger case supplying valve and feed liquor valve be housed.Be connected with the precision digital hydralic pressure gauge on the supplying valve, supplying valve links to each other with four-way by the feed flow house steward, and four-way is connected with the feed flow arm of three band valves.Described feed liquor valve is communicated with test liquid body in the liquid container by feed tube.Described pressurization whippletree left side central authorities are connected with the stay cord right-hand member, and the left end of described stay cord is directly on the reel of the hand winch of the left side top crossbeam central authorities that are fixed on support frame.
Support frame is the three-dimensional rigid frame of a rectangle, and the plunger case horizontal positioned also is fixed on the support frame center upper portion by two plunger case bearings.Described plunger case adopts the acid and alkali-resistance material for the band hollow circular cylinder at the end, makes as acid and alkali-resistance organic glass, engineering plastics, and internal diameter is about 120~150mm, is about 800~1000mm.Plunger is a right cylinder, adopts the acid and alkali-resistance material, makes as acid and alkali-resistance organic glass, engineering plastics, is about 830~1030mm, and external diameter is than the little about 0.05~0.05mm of plunger case internal diameter.Plunger is directly installed in the plunger case, and free movable about can be in plunger case, the plunger after the assembling and the gap of plunger case be 0.015~0.025mm.
The central authorities of the left part of plunger are provided with sleeve block, and the right side central authorities of pressurization whippletree are provided with axle sleeve, and described axle sleeve is hinged by bearing pin and sleeve block.The left end of two lifting ropes is separately fixed at the rear and front end of described pressurization whippletree, two turn to fixed pulley to be separately fixed at the both sides, front and back of support frame right side top cross-bar by turning to the fixed pulley bearing, the right-hand member of described two lifting ropes strides across the forward and backward fixed pulley that turns to respectively, is connected with the rear and front end of cross bar then.The bottom center of described cross bar connects weight-hanger, and counterweight directly is shelved on the base plate of described weight-hanger.The gravity of counterweight acts on test liquid body in the plunger case (promptly be used to test liquid) by plunger, produces a constant compression force, can regulate liquid supply pressure by the plus-minus counterweight.
Plunger case supplying valve and feed liquor valve be housed.Be connected with the precision digital hydralic pressure gauge on the supplying valve, supplying valve links to each other with an interface of four-way by the feed flow house steward, in addition three interfaces of four-way respectively connect the feed flow arm of a band valve, the feed flow arm directly be connected with liquid unit (promptly bearing the experimental apparatus that test specimen is housed or the parts of the effect of test liquid body).When closing the feed liquor valve, can be under the action of gravity of counterweight to carrying out constant-pressure liquid supply with the liquid unit.
The feed liquor valve is communicated with test liquid body in the liquid container by feed tube, and when the valve of closing supplying valve, when opening the feed liquor valve and spurring plunger left, the test liquid body will be inhaled in the plunger case.
Hand winch is fixed on the left side top crossbeam of support frame by turning to the fixed pulley bearing.The right-hand member of stay cord is connected on the left side central part of described pressurization whippletree, and the left end of described stay cord is directly on the reel of hand winch 9.The rotation manual capstan winch just can tighten up stay cord and spur plunger left.Stay cord can be free movable under the constant-pressure liquid supply state.
The course of work of described gravity type constant-pressure liquid supply device is: open supplying valve and feed liquor valve, add a small amount of counterweight, plunger is moved to right to the plunger case bottom, then, close supplying valve, the rotation manual capstan winch, tighten up stay cord, and spur plunger left, the test liquid body is sucked in the plunger case.After the test liquid body in the plunger case reaches the quantity that needs, close the feed liquor valve, open supplying valve, air in emptying feed flow house steward, four-way, the feed flow arm, and experimental needs, get an amount of counterweight and directly be shelved on the weight-hanger, the test liquid body in the action of gravity lower prop plug cylinder of counterweight forms a constant compression force.Only need the feed flow arm is connected to and can carry out related experiment accordingly with the liquid unit.Liquid supply pressure can be adjusted by the plus-minus counterweight.
The present invention compared with prior art has the following advantages and effect:
1) hydraulic pressure that described gravity type constant-pressure liquid supply device provided derives from the gravity of counterweight, and under constant Weight gravity effect, the pressure of test liquid body is constant.
2) having changed in the past in the constant-pressure liquid supply device in the liquid reserve tank liquid level must be constant and keep the way of overflow, can save resource.
3) described gravity type constant-pressure liquid supply device does not need power supply, can long-term work, save the energy, and simultaneously, strengthen the reliability of experiment, can not interrupt because of power failure causes experiment, in addition discarded.
4) described gravity type constant-pressure liquid supply device tightens up stay cord and spurs plunger left by rotating the hand winch that self disposes, and gives described liquid feed device topping up, does not need to join solution feed pump in addition, has removed the misgivings to device security.
5) cut off the feed flow source, effectively cut off the liquid internal vibration source, greatly improved the stability of liquid supply pressure.
6) parts that contact with the test liquid body of described gravity type constant-pressure liquid supply device adopt the acid and alkali-resistance material, make as acid and alkali-resistance organic glass, engineering plastics, can be used for the constant-pressure liquid supply that acid, aqueous slkali etc. have corrosive liquids.Simultaneously, owing to save parts such as solution feed pump, overflow mechanism, equipment more becomes simply, helps the safety management of corrosive liquids.
The applicant utilizes this gravity type constant-pressure liquid supply device to carry out experiment, find: when test liquid body pressure is 100kPa, with flow quantity when the 10ml/h~400ml/h, the pressure surge of test liquid body only is ± 1hPa, solve the traditional bigger difficult problem of liquid feed device liquid supply pressure fluctuation, realized high-precision constant-pressure liquid supply.Utilize this gravity type constant-pressure liquid supply device to carry out the permeability test of low-permeability clay sample, this gravity type constant-pressure liquid supply device continuous working 7 days, test liquid body pressure stability in the experiment, demonstrate good long term work proterties, solved the difficult problem that traditional liquid feed device depends on power supply and long-term feed flow poor reliability.This gravity type constant-pressure liquid supply device has satisfied the demand of scientific experiments such as soil seepage tests and earth pillar leaching test to constant-pressure liquid supply device, has meaning for the development that promotes hydraulics, permeation fluid mechanics.
Description of drawings
Fig. 1 is a kind of gravity type constant-pressure liquid supply device structural representation.
Fig. 2 is a kind of vertical view of gravity type constant-pressure liquid supply device.
Fig. 3 is the A-A sectional view of described gravity type constant-pressure liquid supply device.
Fig. 4 is a kind of B-B sectional view of gravity type constant-pressure liquid supply device.
1. support frames among the figure, 2. plunger case, 3. plunger, 4. comprise first, the second plunger case bearing 4a, 4b, 5. sleeve block, 6. pressurization whippletree, 7. axle sleeve, 8. bearing pin, 9. hand winch, 10. capstan winch bearing, 11. stay cords, 12. comprise first, the second lifting rope 12a, 12b, 13. the feed liquor valve, 14. feed tubes, 15. liquid containers, 16. supplying valve, 17. precision digital hydralic pressure gauges, 18. feed flow house stewards, 19. four-way, 20. the feed flow arm, 21. comprise first, second turns to fixed pulley 21a, 21b, 22. comprise first, second turns to fixed pulley bearing 22a, 22b, 23. cross bar, 24. weight-hanger, 25. counterweights, 26. test liquid bodies.
Embodiment
With reference to the accompanying drawings the present invention is described in further detail below:
According to Fig. 1~Fig. 4 as can be known, this gravity type constant-pressure liquid supply device is by support frame 1, the first, the second plunger case bearing 4a, 4b, plunger 3, plunger case bearing 4, sleeve block 5, pressurization whippletree 6, axle sleeve 7, bearing pin 8, hand winch 9, capstan winch bearing 10, stay cord 11, first, the second lifting rope 12a, 12b, feed liquor valve 13, feed tube 14, liquid container 15, supplying valve 16, precision digital hydralic pressure gauge 17, feed flow house steward 18, four-way 19, feed flow arm 20, the first, second turns to fixed pulley 21a, 21b, first, second turns to fixed pulley bearing 22a, 22b, cross bar 23, weight-hanger 24, counterweight 25 constitutes.
It is characterized in that: support frame 1 is the three-dimensional rigid frame of a rectangle, and plunger case 2 horizontal positioned also are fixed on support frame 1 center upper portion by first, second plunger case bearing 4a, 4b.Plunger case 2 adopts the acid and alkali-resistance material for the band hollow circular cylinder at the end, makes as acid and alkali-resistance organic glass, engineering plastics, and internal diameter is about 120mm, is about 800mm.Plunger case 2 is fixed in the middle of the support frame 1.Plunger 3 is a right cylinder, adopt the acid and alkali-resistance material, make as acid and alkali-resistance organic glass, engineering plastics, be about 830mm, external diameter is than the little about 0.03-0.05mm of plunger case 2 internal diameters, plunger 3 is installed in the plunger case 2, and free movable about can be in plunger case 2, the plunger 3 after the assembling be 0.015-0.025mm with the gap of plunger case 2.
The left part central authorities of plunger 3 are provided with sleeve block 5, and the right side central authorities of pressurization whippletree 6 are provided with axle sleeve 7, and described axle sleeve 7 is hinged by bearing pin 8 and sleeve block 5.The left end of first, second lifting rope 12a, 12b is separately fixed at the rear and front end of described pressurization whippletree 6, turn to fixed pulley bearing 22a, 22b to be fixed on the forward and backward both sides of the right side top cross-bar of support frame 1 by first, second respectively to fixed pulley 21a, 21b, described first, second lifting rope 12a, 12b stride across first, second respectively and turn to fixed pulley 21a, 21b, and the right-hand member of described first, second lifting rope 12a, 12b is connected with the forward and backward two ends of cross bar 23 respectively.The bottom center of described cross bar 23 connects weight-hanger 24, and counterweight 25 directly is shelved on the base plate of described weight-hanger 24.The gravity of counterweight 25 acts on test liquid body 26 in the plunger case 2 (promptly be used to test liquid) by plunger 3, produces a constant compression force, can regulate liquid supply pressure by plus-minus counterweight 25.
Plunger case 2 supplying valve 16 and feed liquor valve 13 be housed.Be connected with precision digital hydralic pressure gauge 17 on the supplying valve 16, described supplying valve 16 links to each other with an interface of four-way 19 by feed flow house steward 18, three interfaces in addition of described four-way 19 respectively connect a feed flow arm 20 of being with valve, another interface of each feed flow arm 20 directly be connected with the liquid unit, under the action of gravity of counterweight 7, can realize constant-pressure liquid supply to usefulness liquid unit.
Feed liquor valve 13 is communicated with test liquid body 16 in the liquid container 15 by feed tube 14, and when the valve of closing supplying valve 8, when unlatching feed liquor valve 13 also spurred plunger 3 left, test liquid body 16 will be inhaled in the plunger case 2.
Parts such as supplying valve 16, feed flow house steward 18, four-way 19, feed flow arm 20, feed liquor valve 13, feed tube 14, liquid container 15 adopt the acid and alkali-resistance material, make as acid and alkali-resistance organic glass, engineering plastics, rubber.
Hand winch 9 is fixed on the left side top crossbeam of support frame 1 by turning to fixed pulley bearing 10.The right-hand member of stay cord 11 is connected on the left side central part of described pressurization whippletree 6, and the left end of described stay cord 11 is directly on the reel of hand winch 9.Rotation manual capstan winch 9 just can tighten up stay cord 11 and spur plunger 3 left.Stay cord 11 can be free movable under the constant-pressure liquid supply state.
The device scope of application:
The invention provides a kind of gravity type constant-pressure liquid supply device, can be used for soil seepage tests and earth pillar leaching test.

Claims (2)

1. gravity type constant-pressure liquid supply device, it comprises support frame (1), plunger case (2), first, the second plunger case bearing (4a, 4b), axle sleeve (7), hand winch (9), capstan winch bearing (10), liquid container (15), four-way (19), feed flow arm (20), turn to fixed pulley bearing (22), it is characterized in that: plunger case (2) is the band hollow circular cylinder at the end, plunger (3) is a right cylinder, plunger (3) is installed in the plunger case (2), support frame (1) is the three-dimensional rigid frame of a rectangle, plunger case (2) horizontal positioned also passes through first, the second plunger case bearing (4a, 4b) be fixed on support frame (1) center upper portion, supplying valve (16) and feed liquor valve (13) are equipped with in the bottom of plunger case (2), be connected with precision digital hydralic pressure gauge (17) on the supplying valve (16), supplying valve (16) is connected with an interface of four-way (19) by feed flow house steward (18), three interfaces in addition of four-way (19) respectively connect a feed flow arm (20) of being with valve, feed liquor valve (13) is communicated with test liquid body (26) in the liquid container (15) by feed tube (14), the left part central authorities of plunger (3) are provided with sleeve block (5), pressurization whippletree (6) right side central authorities are provided with axle sleeve (7), axle sleeve (7) is hinged by bearing pin (8) and sleeve block (5), first, second lifting rope (the 12a, left end 12b) be separately fixed at the pressurization whippletree (6) before, back two ends, first, second turns to fixed pulley (21a, 21b) respectively by first, second turns to fixed pulley bearing (22a, 22b) be fixed on support frame (1) the right side top cross-bar before, back both sides, first, second lifting rope (the 12a, right-hand member 12b) strides across first respectively, second turns to fixed pulley (21a, 21b), respectively with cross bar (23) before, back two ends connect, and the bottom center of cross bar (23) connects weight-hanger (24).
2. a kind of gravity type constant-pressure liquid supply device according to claim 1, it is characterized in that: hand winch (9) is fixed on the left side top crossbeam of support frame (1) by turning to fixed pulley bearing (10), the right-hand member of stay cord (11) is connected on the left side central part of described pressurization whippletree (6), and the left end of described stay cord (11) is directly on the reel of hand winch (9).
CN2009102733241A 2009-12-18 2009-12-18 Gravity type constant-pressure liquid supply device CN101876621B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106124385B (en) * 2016-08-10 2020-04-10 山东科技大学 Self-gravity pressurization undisturbed clay ultrafiltration test device
CN106248551B (en) * 2016-08-10 2020-04-07 山东科技大学 Lateral sectional sampling undisturbed clay ultrafiltration test device
CN106153520B (en) * 2016-08-10 2020-04-07 山东科技大学 Ultrafiltration test device for undisturbed clay

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4588396A (en) * 1982-10-22 1986-05-13 Stroebel Maurice G Apparatus for gravity feed of liquid under constant hydrostatic pressure
CN2115551U (en) * 1992-03-24 1992-09-09 北京市西城区新开通用试验厂 Numerically-controlled voltage constant voltage source means
CN101493388A (en) * 2008-12-30 2009-07-29 中国矿业大学(北京) Gravity hydraulic dead load energy-saving equipment and true triaxial creep experiment system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4588396A (en) * 1982-10-22 1986-05-13 Stroebel Maurice G Apparatus for gravity feed of liquid under constant hydrostatic pressure
CN2115551U (en) * 1992-03-24 1992-09-09 北京市西城区新开通用试验厂 Numerically-controlled voltage constant voltage source means
CN101493388A (en) * 2008-12-30 2009-07-29 中国矿业大学(北京) Gravity hydraulic dead load energy-saving equipment and true triaxial creep experiment system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP昭58-142085A 1983.08.23

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