CN102128775B - Detachable constant head permeability coefficient tester - Google Patents
Detachable constant head permeability coefficient tester Download PDFInfo
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- CN102128775B CN102128775B CN 201010611151 CN201010611151A CN102128775B CN 102128775 B CN102128775 B CN 102128775B CN 201010611151 CN201010611151 CN 201010611151 CN 201010611151 A CN201010611151 A CN 201010611151A CN 102128775 B CN102128775 B CN 102128775B
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- filter screen
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Abstract
The invention discloses a detachable constant head permeability coefficient tester which comprises a base, a permeation cylinder having two open ends, a big filter screen, small filter screens, a metal pore plate, pressure-measuring pins and pressure-measuring tubes, wherein the permeation cylinder is detachably arranged on the base; five bulges are arranged at intervals on the outer surface of the side wall of the permeation cylinder; pressure-measuring through holes which are matched with the pressure-measuring pins are respectively arranged on each bulge and the side wall of the permeation cylinder which is jointed with the bulge; the pressure-measuring pins and the pressure-measuring through holes are in liquid sealing connection; each pressure-measuring pin is fastened by a stopping plate which is arranged on the outer end face of the pressure-measuring through hole; a lifting carriage for supporting the screen body of the big filter screen is arranged between the big filter screen and the base; the permeation cylinder, the pressure-measuring pins and the pressure-measuring tubes are mutually communicated through fluid; and each small filter screen is arranged at one end of each pressure-measuring pin adjacent to the side wall of the permeation cylinder. The detachable constant head permeability coefficient tester has a simple structure, can be conveniently operated, and is low in cost. By using a convenient method, the problems that the filter screens are broken and the parts are difficult to replace and clean because the pressure-measuring holes are easily blocked and compacted by soil particles in the test process are solved.
Description
Technical field
The present invention relates to a kind of osmotic coefficient investigating device, especially be particularly related to a kind of detachable constant head permeability coefficient tester of detachable cleaning.
Background technology
Infiltration is the phenomenon that liquid moves in continuous pore media, and infiltration coefficient is the quantitative target of expressing this phenomenon.Underground supply of groundwater and Escape condition, and the seepage velocity in soil is all relevant with the infiltration coefficient of soil.Infiltration coefficient is important parameter in the Geotechnical Engineering design and construction, therefore tests out exactly this parameter for the seepage stability of analyzing excavation slope, and the speed of calculating settlement of foundation and underground water water yield etc. are all very important.The osmotic coefficient investigating of actual tests middle coarse grained soil adopts constant head permeability test.
At present, the constant head permeameter that generally uses, its pressure tap place is often blocked by fine grained, and build-up of pressure can't accurately be surveyed and read, even if filter screen is set in pressure tap, still has the problem of blocking and can not take out cleaning after long-term the use.And for the soil body sample of different packings, the measurement of its infiltration coefficient is one of main task of permeability test, but conventional permeameter is all because arranging support (in order not affect current under filter screen, be provided with the interval between filter screen and metal perforated plate), when hitting real soil body sample, therefore easily cause filter screen to break, and can't change after the filter screen breakage, to the more difficult realization of mensuration of highly dense solidity soil body sample infiltration coefficient.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of detachable constant head permeability coefficient tester is provided, and it can be cleared up fast to filter screen, can provide enough support tension force to filter screen simultaneously, when avoiding permeating the soil body sample of loading highly dense solidity in cylinder, damage filter screen.
For realizing above technical purpose, the present invention will take following technical scheme:
A kind of detachable constant head permeability coefficient tester, comprise infiltration cylinder, large filter screen, little filter screen, metal perforated plate, pressure measurement pin and piezometric tube that base, open at both ends arrange, described infiltration cylinder is removably mounted on base, and the sidewall outside surface compartment of terrain of infiltration cylinder arranges five projections, the infiltration cylinder side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by pressure measurement through hole outside end face is fastening; The end face of described large filter screen is placed on the flange of infiltration cylinder internal face setting, but and be provided with the bracing frame that is used for supporting large filter screen dictyosome of rigidity lifting between large filter screen and base, fluid perforation mutually between described infiltration cylinder, pressure measurement pin and piezometric tube, and the end that the pressure measurement pin is adjacent with infiltration cylinder side wall surface is installed little filter screen, and the pressure measurement pin other end is connected with piezometric tube.
Described pressure measurement pin is stepped, and this stepped pressure measurement pin is three sections, and the two ends diameter is less, and the interlude diameter is larger, is socketed watertight rubber on described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration cylinder.
Vertically offer the annular receiving groove for accommodating little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and groove top, and the cell wall of annular receiving groove offers the breach that passes for little filter screen.
The bottom land of described annular receiving groove or groove push up and are semicircular ring.
Support frame as described above comprises support, connecting rod and metal perforated plate, described support welding is above base, and an end of connecting rod is fixedly connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, the end of described large filter screen arranges annular flange flange, and the annular flange flange of described large filter screen is socketed in the support periphery, and metal perforated plate is placed in large filter screen below.
The end cross-sectional that described connecting rod passes base is sexangle, and described connecting rod and metal perforated plate are welded to connect.
Described base offers annular groove, and described infiltration cylinder is placed in annular groove, and infiltration cylinder is threaded with annular groove, and installation rubber band sealing between the bottom land of infiltration cylinder end and annular groove.
According to above technical scheme, can realize following beneficial effect:
1, pressure measurement pin of the present invention and pressure measurement through hole are pegged graft, and between pressure measurement pin and pressure measurement through hole, liquid sealing is connected, and employing water stop rubber circle carries out liquid sealing, and therefore, not only hermetic seal is effective, and convenient disassembly; Simultaneously, little filter screen is installed on the pressure measurement pin, base supports filter screen by bracing frame, can effectively stop fine grained soil by and be convenient to cleaning and change;
2, bracing frame of the present invention comprises support, connecting rod and metal perforated plate.No matter the mechanism that support, connecting rod and metal perforated plate form laterally or is vertically providing enough supports can for large filter screen, avoids soil body sample in the infiltration cylinder is hit and causes in real time large filter screen damaged;
3, metal perforated plate and threaded connecting rod welding can reduce metal perforated plate by turn interlinking lever end sexangle notch, makes it to separate with large filter screen, and then is beneficial to soil water by large filter screen; Also but the turn base, remove support, and the cleaning of being convenient to large filter screen is changed;
Therefore, constant head permeability coefficient tester of the present invention, detachable cleaning, simple in structure, easy to operate, with low cost, solved that in the process of the test, pressure tap blocks, hit and cause the large filter screen to break and filtering net part is changed a difficult problem of cleaning in fact with easy method, be a kind of very practical and efficient device.
Description of drawings
Fig. 1 is the patent device structural representation;
Fig. 2 is infiltration barrel structure schematic diagram;
Fig. 3 is the A-A sectional view in Fig. 2;
Fig. 4 is large filter screen vertical view;
Fig. 5 is the front elevation of Fig. 4;
Fig. 6 is the vertical view of base;
Fig. 7 is the front elevation of Fig. 6;
Fig. 8 is the vertical view of metal perforated plate;
Fig. 9 is the front elevation of Fig. 8;
Figure 10 is the vertical view of pressure measurement pin;
Figure 11 is the front elevation of Figure 10;
Figure 12 is the B-B sectional view in Figure 10;
Figure 13 is the structural representation of little filter screen;
Wherein: 1, pressure measurement pin; 2, pressure measurement through hole; 3, projection; 4, little filter screen; 5, infiltration cylinder; 6, metal perforated plate; 7, large filter screen; 8, piezometric tube; 9, rubber band; 10, connecting rod; 11, support; 12, base; 13, annular flange flange; 14, hexagonal breach; 15, watertight rubber; 16, catch; 17, screw.
Embodiment
Accompanying drawing discloses the structural representation of preferred embodiment involved in the present invention without limitation, explains technical scheme of the present invention below with reference to accompanying drawing.
as Fig. 1, Fig. 2 and shown in Figure 3, detachable constant head permeability coefficient tester of the present invention, comprise base, the infiltration cylinder that open at both ends arranges, large filter screen, little filter screen, metal perforated plate, pressure measurement pin and piezometric tube, described infiltration cylinder is removably mounted on base, and the sidewall outside surface compartment of terrain of infiltration cylinder arranges five projections, the infiltration cylinder side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by end face outside the pressure measurement through hole is fastening, the end face of described large filter screen is placed on the flange of infiltration cylinder internal face setting, but and be provided with the bracing frame that is used for supporting large filter screen dictyosome of rigidity lifting between large filter screen and base, fluid perforation mutually between described infiltration cylinder, pressure measurement pin and piezometric tube, and the end that the pressure measurement pin is adjacent with infiltration cylinder side wall surface is installed little filter screen, and the pressure measurement pin other end is connected with piezometric tube.
As extremely shown in Figure 9 in Fig. 1, Fig. 6, support frame as described above comprises support, connecting rod and metal perforated plate, described support welding is above base, and an end of connecting rod is fixedly connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, and the reach that arranges on described connecting rod is 10-15mm; As shown in Figure 4 and Figure 5, the end of described large filter screen arranges annular flange flange, and the annular flange flange of described large filter screen is socketed in the support periphery, makes support to provide enough tension force to filter screen, and metal perforated plate is positioned at the dictyosome below of large filter screen.The end cross-sectional that described connecting rod passes base is sexangle, can rotate lever regulated metal perforated plate height with hex wrench, makes it with large filter screen contact or separates, and described connecting rod and metal perforated plate are welded to connect.Described base offers annular groove, described infiltration cylinder is placed in annular groove, the infiltration cylinder is threaded with annular groove, perhaps infiltration cylinder and annular groove clamping, and the jointing line of infiltration cylinder end and annular groove is progressive curve, in addition, between the bottom land of infiltration cylinder end and annular groove, the rubber band sealing is installed.
As shown in Figure 11 to 13, described pressure measurement pin is stepped, and this stepped pressure measurement pin is three sections, and the two ends diameter is less, and the interlude diameter is larger, is socketed watertight rubber on described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration cylinder.Therefore, the pressure measurement pin for can be plugged in infiltration cylinder sidewall hole in logical variable cross section cylindrical metal parts, vertically offer the annular receiving groove for accommodating little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and groove top, and the cell wall of annular receiving groove offers the breach that passes for little filter screen.The bottom land of described annular receiving groove or groove push up and are semicircular ring.
The present invention is used for constant head permeability parameters determination test, key step is as follows: first little filter screen is inserted in the annular receiving groove of one end setting before the pressure measurement pin is installed, and be socketed watertight rubber on the pressure measurement pin, unscrew screw, remove catch, then the side wall surface that the pressure measurement pin is inserted in the infiltration cylinder is offered in the pressure measurement through hole, and catch is retracted original position, and screwing screw is fixed; Before mounting seat, first connecting rod is screwed in the base screw socket together with metal perforated plate, large filter screen is placed on the support of base, overlap rubber band on base, screw in bottom the infiltration cylinder, stop revolving, with the position of fixing large filter screen when the inner draw-in groove of large filter screen contact infiltration cylinder; Before hitting real sample, with hex wrench rotating metallic connecting rod bottom, with the rising metal perforated plate, it is lining under large filter screen, begins to banket and hit reality, revolve again low metal perforated plate 10mm after hitting real the end, affect the mobile of water in avoiding testing.(GB/T50123-1999) test according to State Standard of the People's Republic of China's " Standard for test methods of earthworks ".After off-test, clearance test screws off base with soil, checks large filter screen operating position, and takes out and clean.Push catch aside, extract the pressure measurement pin, take out little filter screen with tweezers and clean.
Claims (6)
1. detachable constant head permeability coefficient tester, it is characterized in that: comprise infiltration cylinder, large filter screen, little filter screen, pressure measurement pin and piezometric tube that base, open at both ends arrange, described infiltration cylinder is removably mounted on base, and the sidewall outside surface compartment of terrain of infiltration cylinder arranges five projections, the infiltration cylinder side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by pressure measurement through hole outside end face is fastening, the end face of described large filter screen is placed on the flange of infiltration cylinder internal face setting, but and be provided with the bracing frame that is used for supporting large filter screen dictyosome of rigidity lifting between large filter screen and base, support frame as described above comprises metal perforated plate, support and connecting rod, described support welding is above base, and an end of connecting rod is fixedly connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, the end of described large filter screen arranges annular flange flange, the annular flange flange of described large filter screen is socketed in the support periphery, this metal perforated plate is placed in below large filter screen, between described infiltration cylinder, pressure measurement pin and piezometric tube, mutual fluid connects, and a pressure measurement pin end installation little filter screen adjacent with infiltration cylinder side wall surface, and the pressure measurement pin other end is connected with piezometric tube.
2. detachable constant head permeability coefficient tester according to claim 1, it is characterized in that: described pressure measurement pin is stepped, this stepped pressure measurement pin is three sections, the two ends diameter is less, and the interlude diameter is larger, be socketed watertight rubber on described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration cylinder.
3. described detachable constant head permeability coefficient tester according to claim 1 and 2, it is characterized in that: vertically offer the annular receiving groove for accommodating little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and groove top, and the cell wall of annular receiving groove offers the breach that passes for little filter screen.
4. detachable constant head permeability coefficient tester according to claim 3 is characterized in that: the bottom land of described annular receiving groove or groove top are semicircular ring.
5. detachable constant head permeability coefficient tester according to claim 1, it is characterized in that: the end cross-sectional that described connecting rod passes base is sexangle, and described connecting rod and metal perforated plate are welded to connect.
6. detachable constant head permeability coefficient tester according to claim 1, it is characterized in that: described base offers annular groove, described infiltration cylinder is placed in annular groove, and the infiltration cylinder is threaded with annular groove, and between the bottom land of infiltration cylinder end and annular groove, the rubber band sealing is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611151 CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611151 CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
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| Publication Number | Publication Date |
|---|---|
| CN102128775A CN102128775A (en) | 2011-07-20 |
| CN102128775B true CN102128775B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010611151 Expired - Fee Related CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445395B (en) * | 2011-10-10 | 2013-04-17 | 沈阳重型机械集团有限责任公司 | Residue soil improvement experimental device for shield method tunnel construction |
| CN103149143B (en) * | 2013-03-04 | 2015-01-21 | 黄河水利委员会黄河水利科学研究院 | Device for determining permeability coefficient of coarse-grained soil with super large grain size |
| CN104155229B (en) * | 2014-08-13 | 2015-06-03 | 河海大学 | Portable device for soil surface in situ vertical permeability experiment |
| CN104878735B (en) * | 2015-04-21 | 2017-02-01 | 中铁上海设计院集团有限公司 | Soil osmotic coefficient in-situ testing device and testing method thereof |
| CN105588796B (en) * | 2015-12-17 | 2018-01-23 | 扬州大学 | A kind of device of accurate quick measure soil permeability coefficient |
| CN106092849B (en) * | 2016-05-27 | 2019-02-05 | 北京交通大学 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
| CN107014739B (en) * | 2017-06-16 | 2023-09-08 | 成都理工大学 | Undisturbed soil permeability test device and permeability coefficient measurement method |
| CN109932299B (en) * | 2019-03-20 | 2020-08-25 | 山东大学 | Penetration test device and method under simulated ground stress condition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU442771A1 (en) * | 1973-01-05 | 1974-09-15 | Московская Ордена Ленина И Ордена Трудового Красного Знамени Сельскохозяйственная Академия Им.К. А.Тимирязева | Device for isolating seeds from soil weights |
| CN101813607A (en) * | 2010-05-11 | 2010-08-25 | 中国科学院地质与地球物理研究所 | One-dimensional confining loading hydraulic permeability coefficient tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4868512B2 (en) * | 2006-07-21 | 2012-02-01 | 財団法人北九州産業学術推進機構 | Airborne particulate collection device |
-
2010
- 2010-12-29 CN CN 201010611151 patent/CN102128775B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU442771A1 (en) * | 1973-01-05 | 1974-09-15 | Московская Ордена Ленина И Ордена Трудового Красного Знамени Сельскохозяйственная Академия Им.К. А.Тимирязева | Device for isolating seeds from soil weights |
| CN101813607A (en) * | 2010-05-11 | 2010-08-25 | 中国科学院地质与地球物理研究所 | One-dimensional confining loading hydraulic permeability coefficient tester |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2008-23469A 2008.02.07 |
| 盛树馨等.13 渗透试验.《GB/T50123-1999 土工试验方法标准》.1999, * |
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| CN102128775A (en) | 2011-07-20 |
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