CN114441335A - Method and device for measuring flexural strength of calcined gypsum - Google Patents
Method and device for measuring flexural strength of calcined gypsum Download PDFInfo
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- CN114441335A CN114441335A CN202210010347.9A CN202210010347A CN114441335A CN 114441335 A CN114441335 A CN 114441335A CN 202210010347 A CN202210010347 A CN 202210010347A CN 114441335 A CN114441335 A CN 114441335A
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 100
- 239000010440 gypsum Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 61
- 239000002002 slurry Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 58
- 239000007924 injection Substances 0.000 claims description 58
- 238000003825 pressing Methods 0.000 claims description 37
- 238000002360 preparation method Methods 0.000 claims description 19
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 15
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 15
- 239000011507 gypsum plaster Substances 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 17
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011505 plaster Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method and a device for measuring the flexural strength of calcined gypsum, which comprises the following steps of S100, manufacturing a gypsum board die, coating demolding oil in the gypsum board die, adjusting the supporting distance of a universal testing machine to be 220mm, S200, pouring water according to the water consumption of a standard consistency into a stirrer, weighing 1000g of gypsum powder, pouring into water within 5 seconds, and immediately stirring the gypsum powder, wherein the method supports a test board through the universal testing machine to perform a flexural test, eliminates the adverse factor that the test cannot be performed in the initial setting time period of the rapidly calcined gypsum, automatically measures and records data through the universal testing machine, eliminates the influence of a manual operation test on the accuracy of a detection result, improves the precision of the measurement result, controls the same space filled with gypsum slurry in a bottom die through a mechanism to control the thickness of the test board manufactured each time to be the same, and avoids the influence of the parameter change of the test board on the measurement result, the accuracy of the measurement result is further improved.
Description
Technical Field
The invention relates to the technical field of gypsum board detection, in particular to a method and a device for measuring flexural strength of plaster.
Background
The gypsum board is a material made of building gypsum as a main raw material. The building material has the advantages of light weight, high strength, thin thickness, convenient processing, good performances of sound insulation, heat insulation, fire prevention and the like, and can be widely used for inner partition walls, wall covering panels, ceilings, acoustic panels, ground base plates, various decorative plates and the like of various buildings such as houses, office buildings, shops, hotels, industrial plants and the like.
The plasterboard is prepared into a plasterboard test board with a certain size in a mould, and the flexural strength of the test board is detected by an anti-bending tester, but when the flexural performance of the plasterboard is detected by the method, the plasterboard is influenced by the self performance of the plasterboard, and the anti-bending tester is influenced by the operation of testers and the precision of equipment, so that the measurement structure deviation of the plasterboard is larger, the reference is lower, and therefore, a method and a device for measuring the flexural strength of the plasterboard need to be designed.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the flexural strength of plaster, which solve the problem that the existing plaster board is greatly deviated due to the influence of the operation of a measuring instrument and a measuring person and the performance of the plaster board during measurement.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a method for measuring the flexural strength of plaster of paris comprises the steps of,
s100, manufacturing a gypsum board die, wherein the length, the width and the height of the gypsum board die are respectively 260mm, 40mm and 40mm, coating demolding oil in the gypsum board die, and adjusting the supporting distance of a universal testing machine to be 220 mm;
s200, pouring water into a stirrer according to the water consumption of the standard consistency, weighing 1000g of gypsum powder, pouring the gypsum powder into the water within 5 seconds, stirring immediately, pouring the gypsum powder into a gypsum board mold after stirring for 50 seconds, compacting the gypsum powder under the condition of controlled amount of top pressure, lifting the gypsum board mold for 1cm, dropping and repeating for three times;
s300, taking out the molded test blocks in the gypsum board mold, placing the test blocks on a universal testing machine with the side faces upward for anti-bending test, recording the reading of the three test blocks after being broken, and averaging to be accurate to 1N.
As a preferable aspect of the present invention, in the step S200, the controlled pressing condition is to control the internal volume of the gypsum board mold to be a fixed value and to gradually press until the filling process is completed during the process of filling the gypsum slurry into the gypsum board mold.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
a measuring device for a method for measuring the flexural strength of calcined gypsum comprises a sample preparation table and a bottom die arranged on the sample preparation table, wherein a die assembly mechanism connected with the sample preparation table is arranged on the bottom die, and the die assembly mechanism is used for quantitatively compacting gypsum slurry injected into the bottom die;
the die clamping mechanism comprises a connecting support and a plurality of lifting assemblies, the connecting support penetrates through the bottom die and is connected with the sample preparation platform, the lifting assemblies are arranged on the connecting support, a quantitative die closing plate is jointly arranged at the end parts of the lifting assemblies, and a top pressing template used for jacking gypsum slurry in the bottom die is arranged at the bottom of the quantitative die closing plate.
As a preferable aspect of the present invention, the connecting bracket includes a plurality of support columns penetrating through the bottom mold and disposed on the sample preparation table and distributed along a horizontal linear direction, a positioning assembly for fixing the bottom mold to the sample preparation table is commonly disposed on the plurality of support columns, a plurality of notch grooves for the support columns to pass through are disposed on one side of the bottom mold, and the plurality of lifting assemblies are disposed on the corresponding support columns, respectively.
As a preferable scheme of the present invention, the positioning assembly includes a strip-shaped connecting plate horizontally disposed on the plurality of pillars, the strip-shaped connecting plate is vertically provided with a plurality of fixing bolts penetrating through the bottom mold and in threaded connection with the sample preparation table, and each fixing bolt is provided with a pressing plate abutting against the top of the bottom mold.
As a preferred scheme of the invention, the top pressure die assembly plate comprises a plurality of connecting columns which are perpendicular to the surface of the quantitative die assembly plate and are arranged on one side of the quantitative die assembly plate, a top pressure connecting plate which is parallel to a horizontal plane is jointly arranged on the plurality of connecting columns, a telescopic component is arranged at the bottom of the top pressure connecting plate, a die plate for top pressure gypsum slurry is arranged at the end part of the telescopic component, an injection port for the gypsum slurry to pass through is arranged on the die plate, and a through groove for the telescopic component and the injection port to pass through is arranged on the quantitative die assembly plate.
As a preferable mode of the present invention, the injection port includes an injection hole provided on the compression molding plate and an injection pipe provided on the mold combining plate and communicating with the injection hole, and the injection pipe is connected to an injection funnel for injecting the gypsum slurry.
As a preferable scheme of the present invention, an auxiliary connecting plate is horizontally arranged on an inner wall of the injection funnel, an adjusting screw is vertically arranged on the auxiliary connecting plate, an extension sleeve is sleeved on the adjusting screw in a threaded manner, an end of the extension sleeve is connected to a sealing plate for sealing an outlet of the injection pipeline through a rotating assembly, the sealing plate is provided with a plurality of permeation channels for allowing gypsum slurry to permeate, and two ends of the permeation channels are located on two different diameters of the adjusting screw.
As a preferable scheme of the invention, the closing plate comprises a connecting bottom plate connected to the end of the extending sleeve through a rotating assembly and a contact plate fixedly connected to one side of the connecting bottom plate far away from the extending sleeve through a fastening bolt, wherein two side walls of the connecting bottom plate, which are in contact with the contact plate, are provided with accommodating cavities together, and the accommodating cavities are communicated with one sides of the plurality of permeation channels.
As a preferable scheme of the present invention, a plurality of sliding columns are disposed on one side of the pressing plate close to the top pressure connection plate, and the plurality of sliding columns are symmetrically disposed about a center line of the pressing plate in the horizontal direction, and penetrate through the quantitative die assembly plate to the other side.
Compared with the prior art, the invention has the following beneficial effects:
the invention supports the test board by the universal testing machine to carry out the anti-bending test, eliminates the adverse factor that the test can not be carried out in the initial setting time period of the quick calcined gypsum, automatically measures and records data by the universal testing machine, eliminates the influence of a manual operation test on the accuracy of a detection result, improves the accuracy of the measurement result, controls the same space for filling the gypsum slurry in the bottom die by the die assembly mechanism to control the same thickness of the test board prepared each time, avoids the influence of the parameter change of the test board on the measurement result, and further improves the accuracy of the measurement result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic flow chart of a method for measuring flexural strength of plaster of paris in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a measuring device for a method for measuring flexural strength of plaster of paris according to an embodiment of the invention;
fig. 3 is a schematic side view of an injection port according to an embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1-preparing a sample platform; 2-bottom die; 3-a mould closing mechanism;
301-connecting the stent; 302-a lifting assembly; 303-quantifying the template; 304-pressing the template; 305-a pillar; 306-a positioning assembly; 307-notch grooves; 308-strip-shaped connecting plates; 309-fixing bolts; 310-a platen; 311-connecting column; 312-pressing the connecting plate; 313-a telescoping assembly; 314-a die plate; 315-injection port; 316-through slot; 317-an injection hole; 318-injection line; 319-injection funnel; 320-an auxiliary connection plate; 321-an adjusting screw rod; 322-an extension sleeve; 323-a rotating assembly; 324-a closure plate; 325-a permeate channel; 326-connecting the backplane; 327-contact plate; 328-a containment chamber; 329-sliding column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1, the present invention provides a method for measuring the flexural strength of plaster of paris, including the steps of,
s100, manufacturing a gypsum board die, wherein the length, the width and the height of the gypsum board die are respectively 260mm, 40mm and 40mm, coating demolding oil in the gypsum board die, and adjusting the supporting distance of a universal testing machine to be 220 mm;
s200, pouring water into a stirrer according to the water consumption of the standard consistency, weighing 1000g of gypsum powder, pouring the gypsum powder into the water within 5 seconds, stirring immediately, pouring the gypsum powder into a gypsum board mold after stirring for 50 seconds, compacting the gypsum powder under the condition of controlled amount of top pressure, lifting the gypsum board mold for 1cm, dropping and repeating for three times;
s300, taking out the molded test blocks in the gypsum board mold, placing the test blocks on a universal testing machine with the side faces upward for anti-bending test, recording the reading of the three test blocks after being broken, and averaging to be accurate to 1N.
The bending resistance performance of the test board is measured through the universal testing machine, the influence of manual operation tests on the measurement result is avoided, the accuracy of the test result is improved, and the problem that the rapid calcined gypsum is short in initial setting time and cannot be tested is solved.
Secondly, the thickness of the test board prepared each time is controlled to be the same through controlling the amount and the jacking pressure, the problem that the measurement result is influenced due to the fact that the thickness of the test board is different due to the fact that the adding amount of the gypsum slurry is different is avoided, and the accuracy of the measurement result is further improved.
In the step S200, the controlled pressing condition is specifically to control the internal volume of the gypsum board mold to be a fixed value and gradually press until the filling is completed in the process of filling the gypsum slurry into the gypsum board mold.
The thickness of the prepared test plate is controlled to be the same by controlling the volume of the internal space of the gypsum plate mould to be a fixed value, so that the influence of the different thicknesses of the test plates on the accuracy of the measurement result in multiple times of measurement is avoided.
Example 2:
as shown in fig. 2 and fig. 3, the present invention further provides a measuring apparatus for a method for measuring flexural strength of plaster of paris, which comprises a sample preparation table 1 and a bottom mold 2 arranged on the sample preparation table 1, wherein a mold clamping mechanism 3 connected with the sample preparation table 1 is arranged on the bottom mold 2, and the mold clamping mechanism 3 is used for quantitatively compacting gypsum slurry injected into the bottom mold 2;
the mold clamping mechanism 3 comprises a connecting support 301 penetrating through the bottom mold 2 and connected with the sample preparation table 1 and a plurality of lifting assemblies 302 arranged on the connecting support 301, quantitative mold clamping plates 303 are jointly arranged at the end parts of the plurality of lifting assemblies 302, and top press-fit mold plates 304 used for jacking and pressing gypsum slurry in the bottom mold 1 are arranged at the bottoms of the quantitative mold clamping plates 303.
When the device is used, the bottom die 2 is fixed on the sample preparation table 1, and after the die clamping mechanism 3 closes the bottom die 2, gypsum slurry obtained by mixing gypsum powder and water is injected.
When the die clamping mechanism 3 is used, the quantitative die clamping plate 303 and the jacking die clamping plate 304 are driven to move into the bottom die 2 through the lifting assembly 302, the maximum height of the jacking die clamping plate 304 is controlled through the bottom of the quantitative die clamping plate 303, so that the space in the bottom die 2 is controlled, the thickness of a test plate prepared at each time is ensured to be the same by controlling the descending height consistency of the lifting assembly 302 at each time, the size parameters of different test plates are the same when the anti-bending performance of the test plate is measured for multiple times, the influence on the accuracy of a measurement result due to the different size parameters of the test plate is avoided, and the accuracy of the measurement result of the test plate is improved.
In this embodiment, a gypsum slurry is injected into the interior of the bottom mold 2 through the mold clamping mechanism 3 to prepare a test board.
The connecting bracket 301 includes a plurality of support columns 305 that run through the bottom mold 2 and are disposed on the sample preparation table 1 and distributed along the horizontal straight line direction, a positioning assembly 306 for fixing the bottom mold 2 to the sample preparation table 1 is disposed on the plurality of support columns 305, a plurality of notch grooves 307 for the support columns 305 to pass through are disposed on one side of the bottom mold 2, and the plurality of lifting assemblies 302 are disposed on the corresponding support columns 305 respectively.
When the connecting bracket 301 is used, the support columns 305 are used for supporting and installing the positioning assembly 306 and the lifting assembly 302, and meanwhile, the concrete position of the bottom die 2 is defined by the connection and cooperation of the linearly arranged support columns 305 and the corresponding notched grooves 307, and the position of the bottom die 2 is fixed by the positioning assembly 306, so that the bottom die 2 is ensured to correspond to the position of the clamping mechanism 3, and the position of the bottom die 2 is prevented from being shifted during the movement of the lifting assembly 302.
The positioning assembly 306 comprises a bar-shaped connecting plate 308 arranged on the plurality of pillars 305 along the horizontal direction, a plurality of fixing bolts 309 penetrating through the bottom die 2 and the sample preparation table 1 in threaded connection are arranged on the bar-shaped connecting plate 308 along the vertical direction, and a pressing plate 310 abutting against the top of the bottom die 1 is arranged on each fixing bolt 309.
When the positioning assembly 306 is used, the notch groove 307 on the bottom die 2 is aligned with the support 305 and inserted, and the plurality of fixing bolts 309 penetrate through the bottom die 2 and are in threaded connection with the sample preparation table 1, so that the bottom die 2 is fixed, and the positions of the bottom die 2 and the mold clamping mechanism 3 are ensured to be corresponding to each other, so that the quantitative mold clamping plate 303 and the top pressure mold clamping plate 304 can enter the bottom die 2 to prepare the test plate.
The rotary fixing bolt 309 enables the pressing plate 310 to abut against the surface of the bottom die 2, the bottom die 2 is pressed down through the pressing plates 310 to limit the bottom die 2 to overturn, so that the bottom die 2 is limited to move along the horizontal direction and the vertical direction, and the stability of the bottom die 2 in the process of preparing the test board is guaranteed.
The top pressing template 304 comprises a plurality of connecting columns 311 which are perpendicular to the surface of the quantitative combining template 303 and are arranged on one side of the quantitative combining template 303, a top pressing connecting plate 312 which is parallel to the horizontal plane is jointly arranged on the plurality of connecting columns 311, a telescopic component 313 is arranged at the bottom of the top pressing connecting plate 312, a pressing template 314 used for pressing gypsum slurry is arranged at the end part of the telescopic component 313, an injection port 315 for the gypsum slurry to pass through is arranged on the pressing template 314, and a through groove 316 for the telescopic component 313 and the injection port 315 to pass through is arranged on the quantitative combining template 303.
When the top pressing template 304 is used, when the quantitative pressing template 303 is driven to the fixed position inside the bottom die 2 through the lifting component 302, gypsum slurry prepared by mixing gypsum powder and water is injected into the bottom die 2 through the injection port 315, and the telescopic component 313 is started at intervals to drive the pressing template 314 to move along the vertical direction, so that the gypsum slurry accumulated near the injection port 315 is not spread to the even distribution inside the bottom die 2, and the problem that the subsequent gypsum slurry cannot be stably injected and the test board cannot be formed to conform to the bottom die 2 to cause the test board to be unqualified is avoided.
Secondly, the compression moulding board 314 is driven by the telescopic component 313 to reciprocate along the vertical direction to compact the gypsum slurry for multiple times, so that the prepared test board is matched with the bottom mould 2 to meet the test detection requirements, the thickness of the test board prepared at each time is the same, and the accuracy of the measurement result is improved.
The injection port 315 includes an injection hole 317 provided in the platen 314 and an injection pipe 318 provided in the mold clamping plate 314 and communicating with the injection hole 317, and an injection funnel 319 for injecting the gypsum slurry is connected to the injection pipe 318.
When the injection port 315 is used, the gypsum slurry is introduced into the injection hopper 319, and the gypsum slurry enters the bottom mold 2 through the injection pipe 318 and the injection port 317, thereby completing the injection of the gypsum slurry to prepare the test board.
Secondly, in the process that the compression moulding board 314 and the telescopic assembly 313 move up and down, the injection funnel 319 is driven to move synchronously through the injection pipeline 318, so that the normal injection of the gypsum slurry is ensured, and the stability of the injection funnel 319 in the moving process is ensured through the injection pipeline 318.
And the injection pipe 318 drives the injection funnel 319 to move up and down to shake the gypsum slurry in the injection funnel 319, thereby assisting the gypsum slurry to be injected into the bottom mold 2.
The connecting column 311 and the jacking and connecting plate 312 are used for providing an installation position and a telescopic space for the telescopic component 313, the connecting column 311 is arranged on one side, away from the bottom die 2, of the quantitative die combining plate 303, and the lifting component 302 penetrates through the jacking and connecting plate 312 or the lifting component 302 is located beside the jacking and connecting plate 312 so as to avoid interference between the lifting component 302 and the jacking and connecting plate 312. .
Further, the telescopic assembly 313 may be provided in a plurality and symmetrically arranged with respect to the center line of the pressing connection plate 312 to improve the stability of the pressing plate 314 during movement.
Be provided with supplementary connecting plate 320 along the horizontal direction on the inner wall of injection funnel 319, be provided with adjusting screw 321 along vertical direction on the supplementary connecting plate 320, the last screw thread of adjusting screw 321 has cup jointed and has extended sleeve 322, the tip that extends sleeve 322 is connected with the closing plate 324 that is used for sealing the injection pipeline 318 export through rotating assembly 323, be provided with a plurality of infiltration passageways 325 that supply the gypsum thick liquid to ooze on the closing plate 324, and the both ends of infiltration passageway 325 are located two different diameters of adjusting screw 321.
When the bottom mold 2 is filled and abutted against one side of the pressing mold plate 314, the adjusting screw 321 is driven to rotate to drive the extending sleeve 322 to move towards the direction of the injection pipeline 318, the extending sleeve 322 drives the closing plate 324 to enter the injection pipeline 318, when the closing plate 324 enters the injection hole 317 and the bottom of the closing plate 324 moves to be in the same plane with one side of the pressing mold plate 314 contacting with the gypsum slurry, the movement is stopped, the injection hole 317 is closed through the closing plate 324 to ensure the flatness of the surface of the prepared test board, and the accuracy of the detection result is improved.
Secondly, the penetration channel 325 is arranged, so that when the closing plate 324 enters the injection pipeline 318, the closing plate 324 presses the gypsum slurry from the penetration channel 325 to the outside through the closing plate 324, and the closing plate 324 is ensured to normally enter the injection pipeline 318 to close the injection hole 317.
And when the closing plate 324 enters the injection pipeline 318, the closing plate 324 is driven to rotate by the rotating assembly 323, so that the gypsum slurry in the penetration passage 325 is prevented from being condensed with the gypsum slurry in the bottom die 2 to influence the measurement result of the test plate when the edge sealing plate 324 is contacted with the gypsum slurry compacted in the bottom die 2.
Secondly, the two ends of the penetration pipe 325 are positioned at two different diameters of the adjusting screw 321 to be inclined with respect to the surface of the gypsum slurry inside the bottom mold 2, so that the closing plate 324 can assist the gypsum slurry to pass through the penetration passage 325 while rotating.
The closing plate 324 comprises a connecting bottom plate 326 connected to the end of the extending sleeve 322 through a rotating assembly 323 and a contact plate 327 fixedly connected to one side of the connecting bottom plate 326 far away from the extending sleeve 322 through a fastening bolt, wherein a containing cavity 328 is jointly arranged on two side walls of the connecting bottom plate 326 and the contact plate 327, which are in contact with each other, and the containing cavity 328 is communicated with one side of each of the plurality of permeation channels 325.
When the sealing plate 324 is used, the rotating component 323 drives the connecting bottom plate 326 and the contact plate 327 to rotate synchronously, so that the gypsum slurry passes through the penetration passage 325, and the penetration passage 325 on the contact plate 327 scrapes the surface of the gypsum slurry in the bottom mold 2 and enters the accommodating cavity 328, thereby avoiding the problem that more gypsum slurry is accumulated in the penetration passage 325 and is condensed with the gypsum slurry in the bottom mold 2.
A plurality of sliding columns 329 are arranged on one side of the die plate 314 close to the jacking connection plate 312, and the sliding columns 329 are symmetrically arranged along the center line of the die plate 314 in the horizontal direction and penetrate through the quantitative die plate 303 to the other side.
The path of the die plate 314 during movement is limited by the plurality of slide posts 329, so that the stability of the die plate 314 during up-and-down movement is improved.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A method for measuring the flexural strength of plaster of paris is characterized in that: comprises the steps of (a) carrying out,
s100, manufacturing a gypsum board die, wherein the length, the width and the height of the gypsum board die are respectively 260mm, 40mm and 40mm, coating demolding oil in the gypsum board die, and adjusting the supporting distance of a universal testing machine to be 220 mm;
s200, pouring water into a stirrer according to the water consumption of the standard consistency, weighing 1000g of gypsum powder, pouring the gypsum powder into the water within 5 seconds, stirring immediately, pouring the gypsum powder into a gypsum board mold after stirring for 50 seconds, compacting the gypsum powder under the condition of controlled amount of top pressure, lifting the gypsum board mold for 1cm, dropping and repeating for three times;
s300, taking out the molded test blocks in the gypsum board mold, placing the test blocks on a universal testing machine with the side faces upward for anti-bending test, recording the reading of the three test blocks after being broken, and averaging to be accurate to 1N.
2. The method for measuring the flexural strength of the plaster of paris as claimed in claim 1, wherein: in the step S200, the controlled pressing condition is specifically to control the internal volume of the gypsum board mold to be a fixed value and gradually press until the filling is completed in the process of filling the gypsum slurry into the gypsum board mold.
3. A measuring apparatus applied to the method for measuring flexural strength of plaster of paris according to any of claims 1-2, characterized in that: the quantitative compacting device comprises a sample preparation platform (1) and a bottom die (2) arranged on the sample preparation platform (1), wherein a die assembly mechanism (3) connected with the sample preparation platform (1) is arranged on the bottom die (2), and the die assembly mechanism (3) is used for quantitatively compacting gypsum slurry injected into the bottom die (2);
mould clamping mechanism (3) are including running through die block (2) and with linking bridge (301) that system appearance platform (1) is connected and setting up are in a plurality of lifting unit (302) on linking bridge (301), it is a plurality of the tip of lifting unit (302) is provided with ration jointly and closes template (303), the bottom that ration closed template (303) is provided with and is used for the roof pressure gypsum thick liquid in die block (1) top pressfitting template (304).
4. A measuring apparatus for a method of measuring flexural strength of plaster of paris according to claim 3, wherein: connecting bracket (301) is including running through die block (2) sets up a plurality of pillars (305) that system appearance platform (1) was gone up and was distributed along horizontal straight line direction, and is a plurality of be provided with jointly on pillar (305) and be used for fixing die block (2) extremely locating component (306) on system appearance platform (1), one side of die block (2) is provided with the confession a plurality of breach grooves (307) that pillar (305) pass through, and is a plurality of lifting unit (302) sets up respectively and corresponds on pillar (305).
5. The measuring device for the flexural strength of plaster of paris measuring method of claim 4, wherein: locating component (306) include and set up a plurality ofly along the horizontal direction bar connecting plate (308) on pillar (305), be provided with a plurality ofly along vertical direction on bar connecting plate (308) and run through die block (2) with system appearance platform (1) threaded connection's fixing bolt (309), every all be provided with on fixing bolt (309) with clamp plate (310) that die block (1) top offseted.
6. A measuring apparatus for a method of measuring flexural strength of plaster of paris according to claim 3, wherein: the top pressing template (304) comprises a plurality of connecting columns (311) which are perpendicular to the surface of the quantitative pressing template (303) and are arranged on one side of the quantitative pressing template (303), a top pressing connecting plate (312) which is parallel to the horizontal plane is jointly arranged on the plurality of connecting columns (311), a telescopic component (313) is arranged at the bottom of the top pressing connecting plate (312), a pressing template (314) used for pressing gypsum slurry is arranged at the end part of the telescopic component (313), an injection hole (315) for the gypsum slurry to pass through is formed in the pressing template (314), and a through groove (316) for the telescopic component (313) and the injection hole (315) to pass through is formed in the quantitative pressing template (303).
7. The measuring device for the flexural strength of plaster of paris measuring method of claim 6, wherein: the injection port (315) comprises an injection hole (317) arranged on the compression moulding plate (314) and an injection pipeline (318) arranged on the compression moulding plate (314) and communicated with the injection hole (317), and an injection funnel (319) used for injecting gypsum slurry is connected to the injection pipeline (318).
8. The measuring device for the flexural strength of plaster of paris measuring method of claim 7, wherein: be provided with supplementary connecting plate (320) along the horizontal direction on the inner wall of injection funnel (319), be provided with adjusting screw (321) along vertical direction on supplementary connecting plate (320), adjusting screw (321) are gone up the screw thread and have been cup jointed and extend sleeve (322), the tip that extends sleeve (322) is connected with through rotating assembly (323) and is used for sealing injection pipe (318) export closing plate (324), be provided with a plurality of infiltration passageways (325) that supply the gypsum thick liquid to ooze on closing plate (324), just the both ends of infiltration passageway (325) are located on two different diameters of adjusting screw (321).
9. The measuring device for the flexural strength measuring method of plaster of paris as claimed in claim 8, wherein: the closing plate (324) comprises a connecting bottom plate (326) connected to the end of the extension sleeve (322) through a rotating assembly (323) and a contact plate (327) fixedly connected to one side, far away from the extension sleeve (322), of the connecting bottom plate (326) through a fastening bolt, accommodating cavities (328) are jointly arranged on two side walls, in contact with the contact plate (327), of the connecting bottom plate (326), and the accommodating cavities (328) are communicated with one sides of the plurality of permeation channels (325).
10. The measuring device for the flexural strength of plaster of paris measuring method of claim 7, wherein: a plurality of sliding columns (329) are arranged on one side, close to the jacking connecting plate (312), of the pressing template (314), and the sliding columns (329) are symmetrically arranged along the center line of the pressing template (314) in the horizontal direction and penetrate through the quantitative combining template (303) to the other side.
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Address after: 314000 375 Haigang Avenue, Xitangqiao street, Haiyan County, Jiaxing City, Zhejiang Province Applicant after: Mount Taishan Gypsum (Jiaxing) Co.,Ltd. Address before: 314000 375 Haigang Avenue, Xitangqiao street, Haiyan County, Jiaxing City, Zhejiang Province Applicant before: BEIJING NEW BUILDING MATERIAL (JIAXING) CO.,LTD. |
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