CN210269550U - Concrete permeability test piece sealing device and tester - Google Patents
Concrete permeability test piece sealing device and tester Download PDFInfo
- Publication number
- CN210269550U CN210269550U CN201921214860.XU CN201921214860U CN210269550U CN 210269550 U CN210269550 U CN 210269550U CN 201921214860 U CN201921214860 U CN 201921214860U CN 210269550 U CN210269550 U CN 210269550U
- Authority
- CN
- China
- Prior art keywords
- test piece
- inner sleeve
- water
- concrete
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 208
- 238000007789 sealing Methods 0.000 title claims abstract description 76
- 239000004567 concrete Substances 0.000 title claims abstract description 65
- 230000035699 permeability Effects 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 171
- 230000001105 regulatory effect Effects 0.000 claims abstract description 50
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000012783 reinforcing fiber Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 18
- 239000007924 injection Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 5
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011380 pervious concrete Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a concrete permeability test piece sealing device, including overcoat and endotheca, the endotheca is elastic material and is located between overcoat and the test piece, and the endotheca is airtight cavity structure and is equipped with the pressure port, makes endotheca volume expansion through pressure medium to the realization is sealed to the side of test piece, and is sealed effectual, simple structure, practical durable. The utility model also discloses a tester can be used to the test of concrete coefficient of permeability, including overcoat, endotheca, confession drainage system, pressure regulating water tank and measurement system, overcoat and pressure regulating water tank formula as an organic whole or sealing connection, simple structure, the equipment is swift. The utility model also discloses another kind of tester can be used to the detection of concrete impervious grade, including overcoat, endotheca, unable adjustment base and pressurization system, the overcoat is sealing connection with unable adjustment base, and unable adjustment base's top surface can be hugged closely to the bottom surface of test piece and placed, and the equipment is swift, does not have the residual air, and the test result is accurate.
Description
Technical Field
The utility model belongs to a test piece sealing device, especially a device that seals is carried out to the side of circular or square cross section concrete permeability test piece.
The utility model discloses still relate to a tester, adopt above-mentioned test piece sealing device and cooperate parts such as pressure regulating water tank, can be used to the test to the coefficient of permeability of the higher concrete of infiltration capacity.
The utility model discloses still relate to another kind of tester, adopt above-mentioned test piece sealing device and cooperate parts such as unable adjustment base, can be used to the test to the impervious grade of the lower concrete of infiltration capacity.
Background
The permeability is an important property of building materials such as concrete, mortar, brick and the like. According to different use scenes, the permeability of the concrete can be divided into two expression methods of water permeability coefficient and impermeability grade. The water permeability coefficient is specific to concrete with higher permeability (easy to permeate), such as pervious concrete, and the water pressure is lower and the testing time is shorter in the testing process; the impermeability grade is aimed at concrete with lower permeability (not easy to permeate), such as impermeable concrete, and the water pressure is higher and the testing time is longer in the testing process. When the permeability of the two types of concrete is tested, the side surfaces of the concrete test piece are required to be sealed, and relevant test methods include water permeable pavement bricks and water permeable pavement slabs GB/T25993-2010, water permeable bricks JC/T945-2005, test method standards for long-term performance and durability of common concrete GB/T50082-2009, and Hydraulic concrete test regulations SL 352-2006.
In the prior art, two modes of paraffin wax hot melting sealing and rigid sleeve (clamping plate) clamping are mainly adopted in the aspect of sealing a test piece of pervious concrete. The paraffin wax hot melting sealing test piece is adopted, although the sealing effect is reliable, the melted paraffin wax can fill partial holes in the test piece, and the test result is adversely affected. The adoption of the mode of rigid sleeve (clamping plate) clamping (such as the patent of No. CN 207610965) with the lining of non-cavity elastic material has high requirement on the size deviation of a test piece, the sealing effect is not easy to guarantee, and the durability is poor.
In the prior art, a rigid outer sleeve is matched with an elastic sealing ring, and the rigid outer sleeve is matched with an elastic sealing sleeve in the aspect of sealing a test piece of impervious concrete. The test piece is sealed by sleeving the plurality of annular sealing rings on the side face of the test piece, although the operation is simple and convenient, pressure water can freely flow in a gap between the annular sealing rings because the whole sealing of the side face cannot be realized, the osmotic motion of the pressure water cannot be ensured to only occur inside the test piece, and the accuracy of a test result is difficult to ensure. By adopting a cylindrical sealing sleeve mode without a cavity (such as an authorized publication No. CN104931405B patent), the upper edge and the lower edge of the sealing sleeve need to be specially processed to achieve the fixing and sealing effects, the structure is complex, and the assembly is inconvenient. In addition, the test pieces in the two modes are firmly embedded in the rigid outer sleeve, and the distance between the bottom surface of the test piece and the fixed base cannot be adjusted. In order to enable the pressure water injected from the fixed base to act on the whole bottom surface of the test piece, a certain gap needs to be reserved between the bottom surface of the test piece and the fixed base (or a concave platform is arranged on the fixed base) to form a water injection cavity. Under the sealing condition, because the air in the water injection cavity can not be discharged, the permeation of pressure water to the inside of the test piece can be influenced, and the accuracy of a test result is difficult to ensure.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a concrete permeability test piece sealing device, overcome the not enough of prior art, it is sealed effectual, the result accuracy is high, simple structure, it is practical durable.
The utility model discloses another technical problem that solves provides a tester, adopts above-mentioned test piece sealing device and cooperates parts such as pressure regulating water tank, can be used to the coefficient of permeability test to the higher concrete of infiltration capacity.
The utility model discloses another technical problem that will solve provides a tester, adopts parts such as above-mentioned test piece sealing device and cooperation unable adjustment base, can be used to the impervious grade test to the lower concrete of infiltration capacity.
With regard to concrete permeability test piece sealing device, the utility model discloses concrete permeability test piece sealing device includes tube-shape overcoat and tube-shape endotheca, and the overcoat is greater than the overall dimension of test piece for rigidity material and internal dimension, and the endotheca is the elasticity material and is located between overcoat and the test piece, and the endotheca is airtight cavity structure and is equipped with the pressure port, and under the effect of external pressure, pressure medium gets into the cavity of endotheca and makes endotheca volume expansion through the pressure port to closely fill the space between overcoat and test piece, realize the side seal to the test piece.
Compared with the prior art, the concrete permeability test piece sealing device of the utility model has the advantages that the gap between the rigid outer sleeve and the test piece is tightly filled by the inner sleeve with the cavity inside, the volume expansion amplitude of the inner sleeve is large, and the sealing effect is good; the test conditions of the test piece after sealing meet the preset requirements, and the result accuracy is high; the structure is simple, the operation is convenient, and the reliability and durability are realized; the inner sleeve can be flexibly deformed, has low requirement on the allowable error of the size of the test piece, and is suitable for test pieces with different section forms (such as round, square, rectangular and the like).
Preferably, in the free state, the inner sleeve has an inner dimension slightly smaller than the outer dimension of the specimen, or the inner sleeve has an outer dimension slightly larger than the inner dimension of the outer sleeve. Taking a cylindrical test piece as an example, because the inner sleeve is made of an elastic material, the inner sleeve after pressurization is in a circular ring shape (such as a swim ring) under the condition of no external constraint, and the circumference (or the inner diameter and the outer diameter) after pressurization is larger than the size before pressurization. When encapsulating the test piece, the following two ways can be adopted: the inner sleeve test piece is assembled firstly, and the inner sleeve and the outer sleeve are assembled firstly. When the inner sleeve and the test piece are assembled firstly, the inner sleeve with the inner diameter slightly smaller than the outer diameter of the test piece is preferably selected, so that the inner sleeve can be tightly wrapped on the outer surface of the test piece, and the outer sleeve is convenient to install in the next step. When the inner sleeve and the outer sleeve are assembled, the inner sleeve with the outer diameter slightly larger than the inner diameter of the outer sleeve is preferably selected, so that when the inner sleeve is sleeved into the outer sleeve, the inner sleeve can be supported on the inner wall of the outer sleeve by the elastic force generated by compression deformation, and a test piece can be conveniently installed in the next step. After the inner sleeve, the outer sleeve and the test piece are assembled in any one mode, the inner sleeve is pressurized, and therefore the side face of the test piece is sealed. Therefore, other auxiliary tools are not needed, and meanwhile, the automation of test piece packaging is convenient to realize. In addition to the above two methods, an inner sleeve having an outer diameter equal to the inner diameter of the outer sleeve and an inner diameter larger than the outer diameter of the test piece may be used, and at this time, the inner sleeve needs to be attached or embedded on the inner wall of the outer sleeve, and then the test piece is loaded and the inner sleeve is pressurized.
Preferably, the inner sleeve is also provided with a pressure regulating port. The pressure regulating port is added, so that the pressure of the cavity of the inner sleeve can be controlled and regulated in time in the test process, and the pressure relief and the test piece removal after the test are facilitated. When water is used as pressure medium, the pressure regulating port can also be used as an exhaust port during pressurization.
Preferably, the inner sleeve comprises a plurality of cavities in a longitudinal section. For a test piece with a larger size, the cavity of the inner sleeve has a larger size; when the testing pressure is higher, the requirement on the strength of the inner sleeve is also higher. If a single-cavity inner sleeve (such as a swimming ring type) is adopted, the shape and the position of the inner sleeve are not easy to control in the process of packaging the test piece (particularly before the inner sleeve is pressurized); in the pressurizing test process, the pressure born by the inner sleeve is higher. The inner sleeve in the form of a plurality of cavities (such as a plurality of annular cavities arranged at intervals or a single tubular cavity wound and arranged) is adopted, so that the rigidity and the strength of the inner sleeve can be greatly improved, and the stability of the shape and the position of the inner sleeve and higher pressure-bearing capacity are ensured. And the manual packaging of the test piece is facilitated, and the automation of the test piece packaging is also facilitated.
Preferably, the inner sleeve is made of rubber or polyurethane, and the pressure medium is air or water. The polymer material such as synthetic rubber or polyurethane has good tensile and tear resistance, pressure resistance, wear resistance, corrosion resistance, good elasticity, flexible deformation, no limitation of the cross section shape of a test piece, good sealing effect and low use cost. Air and water are easy to obtain, and air pressure and water pressure equipment is rich and diverse and is suitable to be used as a pressure medium. In addition, the water has high bearing capacity and good safety, and is particularly suitable for test conditions with higher pressure.
With regard to the tester that is used for concrete coefficient of permeability, the utility model discloses coefficient of permeability tester is including supplying drainage system, surge tank, sealing device and measurement system, and sealing device includes endotheca and overcoat, its overcoat and surge tank formula as an organic whole or sealing connection.
Compared with the prior art, the permeability coefficient tester adopts the test piece sealing device, and the sealing effect is good; the rigid outer sleeve and the pressure regulating water tank are easily connected in a sealing way (or are integrated), and the assembly is rapid; the whole structure is simple, and the production cost is low.
Preferably, the measuring system comprises a digital flowmeter mounted on the water permeable pipe, and the digital flowmeter can measure and collect flow data of the water permeable pipe. Compared with the mode of weighing the weight of the permeated water or measuring the volume of the permeated water, the method has the advantages that the information such as the instantaneous flow speed, the instantaneous flow, the accumulated flow and the like of the water permeating the test piece when flowing through the permeable pipe is measured and collected by using the digital flowmeter (the turbine flowmeter, the vortex flowmeter, the ultrasonic flowmeter and the like can be selected), the test time is not limited, the automation degree is high, the test data is rich, and the result accuracy is good.
Preferably, the pressure regulating water tank is internally provided with an overflow plate, the overflow plate divides the pressure regulating water tank into a static pressure cavity and an overflow cavity, the static pressure cavity is provided with a water inlet, and the overflow cavity is provided with an overflow port. The fluctuation condition of the liquid level in the pressure regulating water tank is influenced by the size of the overflow port, and compared with the overflow pipe or the overflow groove and the like, the overflow plate mode can expand the overflow section to the maximum extent, reduce the fluctuation of the liquid level and ensure the stability of the water pressure. On the basis, the overflow plate can be arranged into a sectional combination type, and the height of the overflow plate can be adjusted according to different water head height requirements, so that the application range of the tester is enlarged.
With regard to the tester that is used for concrete impervious grade, the utility model discloses an impervious grade tester includes above-mentioned sealing device, unable adjustment base, framework, storage water tank and pressurization system, and sealing device's overcoat and unable adjustment base are sealing connection, and unable adjustment base's top surface can be hugged closely to the bottom surface of test piece and placed.
Compared with the prior art, the impermeability grade tester of the utility model adopts the sealing device, and the sealing effect is good; the rigid outer sleeve and the fixed base are easy to be connected in a sealing way, and the assembly is quick; and no residual air exists between the bottom surface of the test piece and the fixed base, and the error of the test result is small.
Preferably, the inner sleeve of the test piece sealing device contains reinforcing fibers. In the test process of the concrete impermeability grade, the pressure of water in the water injection cavity is relatively high (about 0.5-4.0 MPa), so that the pressure of a pressure medium in the inner sleeve is relatively high (about 0.8-4.5 MPa) to ensure a good sealing effect, and the strength of the inner sleeve can be improved by adding reinforcing fibers (nylon, terylene, aramid fiber, glass fiber and the like) or reinforcing ribs, so that the safety and the reliability of the inner sleeve under high pressure are ensured.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an inner sleeve of a first embodiment of a sealing device for a concrete permeability test piece according to the present invention;
FIG. 2 is a longitudinal cross-sectional view of the inner sleeve of the first embodiment of the sealing device for the concrete permeability test piece of the present invention;
FIG. 3 is a cross-sectional view of the package of the first embodiment of the sealing device for a concrete permeability test piece of the present invention (before pressurization of the inner sleeve);
FIG. 4 is a cross-sectional view of the package of the first embodiment of the sealing device for a concrete permeability test piece of the present invention (after the inner sleeve is pressurized);
FIG. 5 is a schematic illustration of the sealing device for a concrete permeability test piece according to a first embodiment of the present invention (after the inner sleeve is pressurized);
FIG. 6 is a schematic illustration of the encapsulation of a second embodiment of the sealing device for a concrete permeability test piece according to the present invention;
FIG. 7 is a schematic view of an integrated pressure regulating water tank and an outer sleeve of a first embodiment of the concrete water permeability tester of the present invention;
FIG. 8 is a side view of the integrated pressure regulating water tank and the outer sleeve of the first embodiment of the concrete water permeability tester of the present invention;
FIG. 9 is a schematic overall view of a first embodiment of the concrete water permeability tester of the present invention;
FIG. 10 is a schematic view of an integrated pressure regulating water tank and an outer sleeve of a second embodiment of the concrete water permeability coefficient tester of the present invention;
FIG. 11 is a top view of an integrated pressure regulating water tank and an outer sleeve of a second embodiment of the concrete water permeability coefficient tester of the present invention;
FIG. 12 is a schematic view showing the connection between a pressure regulating water tank and a specimen sealing device of a third embodiment of the concrete water permeability coefficient tester of the present invention;
FIG. 13 is a schematic view of a test piece package of a first embodiment of the concrete impermeability grade testing apparatus of the present invention (before test pressurization);
FIG. 14 is a schematic view of a test piece package (after test pressurization) of a first embodiment of the concrete impermeability grade testing apparatus of the present invention;
fig. 15 is an overall front view of a first embodiment of the concrete impermeability grade testing instrument of the present invention;
FIG. 16 is a top plan view of the concrete impermeability grade testing instrument of the present invention;
fig. 17 is a schematic view of a test piece package of a second embodiment of the concrete impermeability grade tester of the present invention (before test pressurization).
Wherein: 1. an inner sleeve; 2. pressurization mouth, 3, overcoat, 4, test piece, 5, pressure regulating water tank, 6, overflow board, 7, overflow chamber, 8, overflow mouth, 9, static pressure chamber, 10, water inlet, 11, framework, 12, storage water tank, 13, inlet tube, 14, overflow pipe, 15, header tank, 16, the pipe of permeating water, 17, digital flowmeter, 18, the air pump, 19, the host computer, 20, O type sealing washer, 21, pressure regulating mouth, 22, unable adjustment base, 23, the water filling port, 24, the water filling chamber.
Detailed Description
The concrete permeability test piece sealing device and the tester of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments, so as to understand the structure composition, the assembling method and the using mode of the present invention more clearly, but the protection scope of the present invention cannot be limited thereby.
The first embodiment of the sealing device for the concrete permeability test piece of the utility model is shown in fig. 1 to 5. The inner sleeve 1 is made of polyurethane, 1 closed cavity is arranged in the inner sleeve, and a pressurizing port 2 is arranged at the lower part of the inner sleeve. The test piece 4 is a cube whose perimeter is slightly larger than the perimeter of the inner ring of the inner sleeve 1 (when the test piece is not loaded, the perimeter of the inner ring after the inner sleeve is pressurized is still not larger than the perimeter of the test piece). The outer sleeve 3 is in a square tube shape and made of hard polyvinyl chloride, has high strength and rigidity, and the side length of the inner part of the outer sleeve is larger than that of the test piece 4. When the test piece 4 is packaged, the inner sleeve 1 is firstly sleeved on the side surface of the test piece 4, and then the inner sleeve 1 and the test piece 4 are arranged in the outer sleeve 3 together. Compressed air is injected into the cavity of the inner sleeve 1 through the pressurizing port 2 by using a tool such as an air pump. The inner sleeve 1 expands in volume, and the gap between the inner sleeve 1 and the outer sleeve 3 is gradually filled. And continuously injecting compressed air until the pressure of the cavity of the inner sleeve 1 reaches a preset pressure value. At this time, the gaps between the outer sleeve 3 and the inner sleeve 1 and between the inner sleeve 1 and the test piece 4 are tightly filled with the expanded inner sleeve 1, so that pressure water for testing is prevented from passing through the gaps, and the side surface of the test piece 4 is sealed.
Because the polyvinyl chloride has good elastic deformability, and after the test piece 4 is sealed and assembled (the outer sleeve 3 is installed and the inner sleeve 1 is pressurized), the inner side of the inner sleeve 1 is still in a pulled state in a plane, so that the outer surface of the test piece 4 cannot be wrinkled and deformed, and the sealing effect is easier to ensure.
The second embodiment of the sealing device for the concrete permeability test piece of the utility model is shown in fig. 6. The inner sleeve 1 and the outer sleeve 3 are split and are formed by assembling 2L-shaped components. The inner sleeve 1 is made of rubber, a plurality of tubular cavities are longitudinally arranged on the L-shaped part of each inner sleeve 1, and the tubular cavities are connected with the pressurizing ports 2 through connecting pipes. The inner sleeve 1 is pasted on the inner wall of the outer sleeve 3 through materials such as adhesive or nylon paste, a through hole matched with the pressure port 2 is formed in the outer sleeve 3, and the pressure port 2 penetrates out of the through hole. The 2L-shaped portions of the outer sleeve 3 may be secured together by bolts, clamps or other clamping means.
Firstly, a test piece 4 is placed on a platform, 2L-shaped assemblies surround from the corresponding side edge of the test piece 4 to the center, and the inner size of the inner sleeve 1 after surrounding is larger than the external size of the test piece 4. 2L-shaped components are connected and fixed on the outer wall of the outer sleeve 3, and then compressed air is respectively injected into the cavity of the inner sleeve 1 through 2 pressurizing ports 2. The volume of the inner sleeve 1 expands, and the gap between the inner sleeve 1 and the test piece 4 is gradually filled until the cavity pressure of the inner sleeve 1 reaches a preset pressure value. At this time, the gaps between the outer sleeve 3 and the inner sleeve 1 and between the inner sleeve 1 and the test piece 4 are tightly filled with the expanded inner sleeve 1, so that pressure water for testing is prevented from passing through the gaps, and the side surface of the test piece 4 is sealed.
The first embodiment of the concrete water permeability coefficient tester of the utility model is shown in fig. 7 to fig. 9. The pressure regulating water tank 5 and the outer sleeve 3 are integrated (all marked as 5 in fig. 7 to 9), namely the lower part is used for packaging the test piece 4, and the upper part is used for regulating the water level. The test piece 4 is a cube, the pressure regulating water tank 5 is in a square barrel shape, the interior of the pressure regulating water tank is divided into an overflow cavity 7 and a static pressure cavity 9 by the overflow plate 6, and the overflow cavity 7 and the static pressure cavity 9 are communicated on the upper portion of the overflow plate 6. An overflow port 8 is arranged on the outer wall of the overflow cavity 7, and a water inlet 10 is arranged on the outer wall of the static pressure cavity 9. In order to avoid disturbance of the water inflow to the liquid level at the upper part of the static pressure cavity 9 (influencing the water pressure acting on the surface of the test piece 4), the water inlet 10 is arranged at the middle part of the height of the static pressure cavity 9.
The pressure-regulating water tank 5 is fixed to the frame 11 by a mounting plate on the outer wall thereof, and a water collection tank 15 is provided directly below the pressure-regulating water tank. The upper opening of the water collecting tank 15 is larger than the section size of the pressure regulating water tank 5, and the bottom of the water collecting tank is an inclined surface and is connected with a water permeable pipe 16. The water penetrating through the test piece 4 is discharged to a water storage tank 12 provided with a variable frequency motor water pump through a water collecting tank 15 and a permeable pipe 16. A digital flowmeter 17 is arranged on the lower section of the horizontal pipeline of the permeable pipe 16. The digital flowmeter 17 adopts a Jiangsu red flag HQBS-DY15C type capacitance flowmeter, the pipe diameter is 15mm, the accuracy is 0.2%, the flowmeter is suitable for medium temperature of-20-70 ℃, has temperature and pressure compensation, is provided with a lithium battery, has 4-20mA current output, is provided with RS-232 and RS-485 communication interfaces and a wireless transmission function, and can measure and acquire flow data of the permeable pipe 16 and transmit the flow data to the host 19. A water inlet pipe 13 and an overflow pipe 14 are respectively connected between the pressure regulating water tank 5 and the water storage tank 12, and a digital flowmeter is also arranged on the overflow pipe 14. The frame body 11 is also provided with an air pump 18, and the air pump 18 is connected with the pressurizing port 2 of the inner sleeve 1 through a pipeline.
After the test piece 4 is sealed in place, the host 19 is turned on and the relevant test parameters are set. The water pump is started, water in the water storage tank 12 enters the pressure regulating water tank 5 through the water inlet pipe 13, and a part of the water flows back to the water storage tank 12 through the overflow pipe 14. The other part of the sample passes through the test piece 4 and is then discharged to the water storage tank 12 through the water collection tank 15 and the permeable pipe 16. The digital flow meters on the water permeable pipe 16 and the overflow pipe 14 respectively measure and collect flow data in corresponding pipelines and transmit the flow data to the host 19. The host 19 adjusts the output flow of the water pump according to the flow data of the overflow pipe 14, and the water level in the pressure-adjusting water tank 5 is at a preset height and is kept in a stable state based on that a small amount of water flow always exists in the overflow pipe 14. When the water quantity of the overflow pipe 14 exceeds the preset upper limit, the water quantity of the water inlet pipe 13 is larger, so that the water quantity is required to be adjusted downwards, otherwise, more water is unnecessarily consumed, and even the water head height exceeds the preset requirement; when the water quantity of the overflow pipe 14 is lower than the preset lower limit, the water quantity of the water inlet pipe 13 is smaller, so that the water quantity should be adjusted upwards, otherwise, the water head height of the pressure regulating water tank 5 is lower than the preset requirement.
During testing, the digital flow meter 17 on the permeable pipe 16 outputs water flow data collected by real-time measurements to the host computer 19. And in a preset test period, when the test data (including the test duration, the instantaneous value, the average value, the extreme value, the accumulated value, the standard deviation and the like) of the water permeability meet preset conditions, recording the test data and stopping the test. The water pump is turned off and the water is drained to the water storage tank 12 under the action of its own weight. And opening the pressurizing port 2 of the inner sleeve 1, evacuating air in the inner sleeve 1, and taking the test piece 4 and the inner sleeve 1 out of the pressure-regulating water tank 5 together. And the test work of the water permeability coefficient of 1 test piece is completed.
When the water quality for testing is high, in order to prevent the water flowing through the test piece 4 from polluting the water storage tank 12, a purification device can be additionally arranged in the water permeable pipe 16 or the water storage tank 12, or the water permeable pipe 16 is directly connected to the building for draining the drainage.
The second embodiment of the concrete permeability coefficient tester of the utility model is shown in fig. 10 and fig. 11. Pressure regulating water tank 5 and overcoat 3 formula as an organic whole (label is 5 in fig. 10), and the lower part is used for encapsulating test piece 4 promptly, and upper portion is used for the water level pressure regulation, adopts the mode of fig. 6 to be assembled by 2L type subassemblies and forms. The pressure regulating water tank 5 is internally divided into an overflow cavity 7 and a static pressure cavity 9 by an overflow plate 6, and the overflow cavity 7 is positioned at the corner of the cross section of the pressure regulating water tank 5.
The 2L-shaped components are assembled to form the integrated pressure regulating water tank 5, and the integrated pressure regulating water tank is matched with a corresponding fixing and clamping device or fixture (such as patents of grant publication numbers CN207610965, CN208060347U and the like), so that the side face of the test piece 4 can be quickly sealed.
The third embodiment of the concrete permeability coefficient tester of the utility model is shown in figure 12. The test piece 4 is cylindrical, and pressure regulating water tank 5 and overcoat 3 are split type, are cylindricly, and the organic glass material, its adjacent terminal surface all is equipped with annular groove. The inner sleeve 1 is made of synthetic rubber, 6 tubular cavities are uniformly distributed in the inner sleeve along the height direction, and the 6 tubular cavities are connected with the pressurizing port 2 through a connecting pipe. In the free state. The outer diameter of the inner sleeve 1 is slightly larger than the inner diameter of the outer sleeve 3, and the inner diameter of the inner sleeve 1 is larger than the outer diameter of the test piece 4.
When the test piece 4 is packaged, the inner sleeve 1 is firstly arranged in the outer sleeve 3, and the inner sleeve 1 can be supported in the outer sleeve 3 without external force under the elastic action caused by compression deformation because the synthetic rubber has certain elasticity. The test piece 4 is placed on a platform, and the outer sleeve 3 with the inner sleeve 1 is sleeved on the test piece 4. And then the pressurizing port 2 is inflated and pressurized, and the tubular cavity in the inner sleeve 1 is pressurized and expanded, so that the inner sleeve 1 is expanded and deformed, and the side surface of the test piece 4 is sealed.
Put into O type sealing washer 20 in the cyclic annular recess of 3 terminal surfaces of overcoat, arrange pressure regulating water tank 5 in on overcoat 3, make the recess of 5 terminal surfaces of pressure regulating water tank align O type sealing washer 20, fix through the bolt to realize the sealing connection of pressure regulating water tank 5 and overcoat 3. Besides the mode of bolts and O-shaped sealing rings, the same sealing connection effect can be achieved by adopting modes of quick-assembling fixtures, flat gaskets, step-shaped end faces and the like.
The first embodiment of the concrete impermeability grade tester of the utility model is shown in fig. 13 to fig. 16. According to the standards of 'test method standard for long-term performance and durability of common concrete' GB/T50082-2009, and 'concrete impermeability tester' JG/T249-2009 and the like, when testing the impermeability grade of concrete, the test piece 4 is in a shape of a circular truncated cone, the diameter of the bottom surface is 185mm, the diameter of the top surface is 175mm, and the height is 150 mm. Correspondingly, the inner sleeve 1 and the outer sleeve 3 are both cylindrical with a large bottom and a small top. The inner sleeve 1 has an inner diameter slightly smaller than the outer diameter of the test piece 4, and a tubular winding cavity is arranged in the inner sleeve 1 and is connected with the pressure port 2 and the pressure regulating port 21. The bottom of the outer sleeve 3 is provided with a connecting plate which can be fixed on the fixed base 22 through bolts. The center of the fixed base 22 is provided with a water filling port 23. The connection surfaces of the fixed base 22 and the outer sleeve 3 are both provided with annular grooves, and O-shaped sealing rings 20 are arranged in the grooves. The frame body 11 of the tester is also provided with a water storage tank, a pressurization system, a pressure control system and the like, wherein the pressurization system is respectively connected with the pressurization port 2 in the inner sleeve 1 and the water injection port 23 in the fixed base 22, and the pressure control system comprises a pressure reducing valve for controlling different pressures of water in the inner sleeve 1 and the fixed base 22. The frame body 11 is provided with 6 testing stations, and the impermeability grades of 1 group (6) of test pieces can be tested at one time.
When the test piece 4 is packaged, the inner sleeve 1 is tightly sleeved on the side surface of the test piece 4. Then the inner sleeve 1 and the test piece 4 are put on the fixed base 22 together, and then the outer sleeve 3 is sleeved. And starting the pressurizing system, opening a water injection valve connected with the inner sleeve 1, and injecting water into the cavity of the inner sleeve 1 through the pressurizing port 2. The inner sleeve 1 expands in volume, and the gap between the inner sleeve 1 and the outer sleeve 3 is gradually filled. During this period, the pressure regulating port 21 is manually adjusted, and the pressure regulating port 21 is closed after it is confirmed that all the air in the cavity of the inner sleeve 1 is discharged. And continuously injecting water until the pressure of the cavity of the inner sleeve 1 reaches a preset pressure value, and then closing a water injection valve connected with the inner sleeve 1. At this time, the gaps between the outer sleeve 3 and the inner sleeve 1 and between the inner sleeve 1 and the test piece 4 are tightly filled with the expanded inner sleeve 1, so that pressure water for testing is prevented from passing through the gaps, and the side surface of the test piece 4 is sealed. And the bottom surface of the test piece 4 is tightly attached to the top surface of the fixed base 22, so that no excess air remains.
After the test piece 4 is sealed, the water injection valve connected to the fixing base 22 is opened, and water is injected to the bottom surface of the test piece 4 through the water injection port 23. Under the action of water pressure, the position of the test piece 4 moves upwards, and the inner sleeve 1 is driven to deform correspondingly. Because the inner sleeve 1, the outer sleeve 3 and the test piece 4 are all in a shape with a large bottom and a small top, the test piece 4 reaches an equilibrium state after moving upwards for a certain distance. At this time, a water injection cavity 24 is formed between the bottom surface of the test piece 4 and the fixing base 22, and water in the water injection cavity 24 is flowed in by the water injection port 23 without leaving air. In this state, the entire bottom surface of the test piece 4 is subjected to a predetermined water pressure, and the water in the water injection chamber 24 is subjected to a penetrating motion from the bottom surface to the top surface of the test piece 4 under the pressure. During the test, if the pressure in the cavity of the inner sleeve 1 exceeds a preset limit value, the pressure relief can be adjusted through the pressure adjusting port 21 on the inner sleeve 1.
The second embodiment of the concrete impermeability grade tester of the utility model is shown in figure 17. The outer diameter of the inner sleeve 1 is slightly larger than the inner diameter of the outer sleeve 3, the inner diameter of the inner sleeve 1 is larger than the outer diameter of the test piece 4, and nylon fibers are arranged in the inner sleeve 1 to enhance the pressure resistance. The outer wall of the inner sleeve 1 is provided with 2 annular convex ribs along the height direction. The outer sleeve 3 is made of steel, and 2 annular grooves are formed in the corresponding positions of the inner wall of the outer sleeve. The bottom of the outer sleeve 3 is provided with a connecting plate which can be fixed on the fixed base 22 through bolts. The fixed base 22 is provided with a boss matched with the bottom surface of the test piece 4, the heights of the inner sleeve 1 and the outer sleeve 3 are both larger than the height of the test piece 4, and the difference value of the heights is matched with the height of the boss of the fixed base 22. The pressure port 2 and the pressure regulating port 21 in the inner sleeve 1 are both arranged in the middle of the height, and the corresponding part of the outer sleeve 3 is provided with a through hole matched with the pressure regulating port.
When the test piece 4 is packaged, the inner sleeve 1 is sleeved into the outer sleeve 3, the pressurizing port 2 and the pressure regulating port 21 penetrate out of the corresponding through holes, and the convex ribs of the inner sleeve 1 are embedded in the grooves of the outer sleeve 3. Because the outer diameter of the inner sleeve 1 is slightly larger than the inner diameter of the outer sleeve 3, under the elastic force generated by compression deformation and the embedding action of the 2 annular rib grooves, the pressurizing port 2 penetrating out of the outer sleeve 3 and the pressure regulating port 21, the inner sleeve 1 can be tightly attached to the inner wall of the outer sleeve 3 without external force. Then the test piece 4 is placed on the boss of the fixed base 22, the outer sleeve 3 with the inner sleeve 1 is sleeved on the test piece 4, and the outer sleeve 3 and the fixed base 22 are connected and fixed through bolts.
And starting the pressurizing system, opening a water injection valve connected with the inner sleeve 1, and injecting water into the cavity of the inner sleeve 1 through the pressurizing port 2. The inner sleeve 1 expands in volume, and gaps between the inner sleeve 1 and the test piece 4 and between the inner sleeve 1 and the boss of the fixed base 22 are gradually filled. During this period, the pressure regulating port 21 is manually adjusted, and the pressure regulating port 21 is closed after it is confirmed that all the air in the cavity of the inner sleeve 1 is discharged. And continuously injecting water until the pressure of the cavity of the inner sleeve 1 reaches a preset pressure value, and then closing a water injection valve connected with the inner sleeve 1. At this time, the gaps between the outer sleeve 3 and the inner sleeve 1, between the inner sleeve 1 and the test piece 4, and between the inner sleeve 1 and the boss of the fixed base 22 are all tightly filled with the expanded inner sleeve 1, so that the test piece 4 is sealed at the side surface. And the bottom surface of the test piece 4 is tightly attached to the top surface of the boss of the fixed base 22, so that no redundant air is left.
After the test piece 4 is sealed, the water injection valve connected to the fixing base 22 is opened, and water is injected to the bottom surface of the test piece 4 through the water injection port 23. Under the action of water pressure, the position of the test piece 4 moves upwards, and the inner sleeve 1 is driven to deform correspondingly. At this time, a water injection cavity is formed between the bottom surface of the test piece 4 and the boss of the fixing base 22, all the bottom surfaces of the test piece 4 bear a predetermined water pressure effect, and water in the water injection cavity performs a penetrating motion from the bottom surface to the top surface of the test piece 4 under the pressure effect.
In addition to the above description of the embodiments and the usage, the sealing device and the tester for the concrete permeability test piece of the present invention have other similar structural forms, assembling methods and usage, and can also accomplish the objects of the present invention. Modifications and substitutions which will be apparent to those skilled in the art are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a concrete permeability test piece sealing device, includes tube-shape overcoat and tube-shape endotheca, the overcoat is the overall dimension that rigidity material and internal dimension are greater than the test piece, the endotheca is elastic material and is located the overcoat with between the test piece, its characterized in that: the inner sleeve is of a closed cavity structure and is provided with a pressurizing port, and under the action of external pressure, pressure medium enters the cavity of the inner sleeve through the pressurizing port and expands the volume of the inner sleeve, so that the side surface of the test piece is sealed.
2. The sealing device for the concrete permeability test piece according to claim 1, wherein: in a free state, the inner dimension of the inner sleeve is smaller than the outer dimension of the test piece, or the outer dimension of the inner sleeve is larger than the inner dimension of the outer sleeve.
3. The sealing device for the concrete permeability test piece according to claim 1, wherein: the inner sleeve is provided with a pressure regulating port.
4. The sealing device for the concrete permeability test piece according to claim 1, wherein: the inner sleeve comprises a plurality of cavities on a longitudinal section.
5. The sealing device for the concrete permeability test piece according to claim 1, wherein: the inner sleeve is made of rubber or polyurethane, and the pressure medium is air or water.
6. A tester adopting the sealing device of the concrete permeability test piece of claim 1, which comprises a water supply and drainage system, a pressure regulating water tank, a sealing device and a measuring system, can be used for testing the permeability coefficient of concrete, the sealing device comprises an outer sleeve and an inner sleeve, and is used for sealing the test piece, and the tester is characterized in that: the outer sleeve is connected with the pressure regulating water tank in an integrated or sealed mode.
7. The test meter of claim 6, wherein: the measuring system includes a digital flow meter mounted on a water permeable tube that measures the flow of water through the test piece.
8. The test meter of claim 6, wherein: the pressure regulating water tank is internally provided with an overflow plate, the overflow plate divides the pressure regulating water tank into a static pressure cavity and an overflow cavity, the static pressure cavity is provided with a water inlet, and the overflow cavity is provided with an overflow port.
9. A tester using the sealing device for the concrete permeability test piece of claim 1, which comprises an outer sleeve, an inner sleeve, a fixed base, a frame body, a water storage tank and a pressurizing system, and can be used for testing the concrete impermeability grade, wherein the test piece is sealed by the inner sleeve and the outer sleeve and is placed on the fixed base provided with a water filling port, and the tester is characterized in that: the outer sleeve is connected with the fixed base in a sealing mode, and the bottom surface of the test piece can be placed close to the top surface of the fixed base in a clinging mode.
10. The test meter of claim 9, wherein: the inner sleeve contains reinforcing fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921214860.XU CN210269550U (en) | 2019-07-30 | 2019-07-30 | Concrete permeability test piece sealing device and tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921214860.XU CN210269550U (en) | 2019-07-30 | 2019-07-30 | Concrete permeability test piece sealing device and tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210269550U true CN210269550U (en) | 2020-04-07 |
Family
ID=70015116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921214860.XU Expired - Fee Related CN210269550U (en) | 2019-07-30 | 2019-07-30 | Concrete permeability test piece sealing device and tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210269550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405873A (en) * | 2021-06-22 | 2021-09-17 | 江苏省建筑工程质量检测中心有限公司 | Sealing device for concrete entity impermeability test and impermeability test method |
-
2019
- 2019-07-30 CN CN201921214860.XU patent/CN210269550U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405873A (en) * | 2021-06-22 | 2021-09-17 | 江苏省建筑工程质量检测中心有限公司 | Sealing device for concrete entity impermeability test and impermeability test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021143229A1 (en) | Test system for measuring gas permeation parameters of ultra-low permeability medium in multi-field and multi-phase coupling conditions | |
| CN108982327A (en) | A kind of damage concrete permeability detection device | |
| CN205229005U (en) | Experimental device for survey coal petrography is respectively to permeability | |
| CN109211757B (en) | Rock penetration test device and test method thereof | |
| CN1737530B (en) | Method for testing permeability coefficient and anti-pervasion gradient ratio | |
| CN107436140A (en) | The settling column test instrument and test method that vacuum preloading and piling prepressing are combined | |
| CN106706500A (en) | Device for determining permeability of concrete | |
| CN110044529B (en) | Method for measuring soil pressure outside shield tunnel | |
| CN210269550U (en) | Concrete permeability test piece sealing device and tester | |
| CN109765161A (en) | It is a kind of to utilize permeability test method and device that bucket offer osmotic pressure and confining pressure are provided | |
| CN109060543A (en) | Directly measure the device and its measurement method of triaxial test rubber-oil-pipe sensor amount | |
| CN109946213A (en) | Soil cement penetration equipment and permeability test method | |
| CN111912760A (en) | Test device and test method for simulating contact surface seepage coupling characteristics | |
| CN111398134A (en) | Sealed examination mould subassembly | |
| CN116047024A (en) | Grouting lifting three-dimensional model test device and test method | |
| CN114279927A (en) | Testing device and testing method for load and seepage coupling of large-pore concrete | |
| CN115248177B (en) | Method and device for measuring breakthrough pressure of low-permeability rock based on optical fiber sensing | |
| CN109115658B (en) | Rock diffusion coefficient measuring device and method | |
| CN114324104B (en) | Cement concrete coefficient of permeability test experimental apparatus | |
| CN106018109A (en) | Continuous stable pressurization type geomembrane liquid expansion deformation mechanical testing device | |
| CN108226006B (en) | Method for testing fluid permeability of cement-based material | |
| CN112683746B (en) | Device and method for measuring effective stress conversion rate of slurry film forming | |
| CN114739888A (en) | Permeation test device and method for pervious concrete in various shapes | |
| CN113758850B (en) | Flexible wall permeameter for realizing temperature-stress integrated control under dry-wet circulation | |
| CN210347405U (en) | Double-cylinder constant water head testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200407 |