Concrete volume linear deformation testing device and testing method

Abstract

The invention relates to the technical field of testing devices, and discloses a concrete volume linear deformation testing device and a testing method.The concrete volume linear deformation testing device comprises a barrel, a conical tray and a cambered surface supporting bowl, the conical tray is arranged in the barrel, and the cambered surface supporting bowl is arranged above the conical tray. The cambered surface supporting bowl is manually rotated, the cambered surface supporting bowl drives the conical bowl to rotate through cooperation of the driving block and the positioning notch, when the protruding block rotates to the tail end of the limiting groove, the water passing opening in the outer surface of the conical bowl communicates with the water passing opening in the outer surface of the conical tray, and at the moment, the concrete surface is compacted due to vibration; the generated laitance can enter the conical bowl along with the water flowing opening and enter the water storage cylinder through the water falling opening, the grout on the surface of the concrete can be conveniently collected in real time through the device, the grout collecting speed is high, manual scraping by testers is not needed, and the testing efficiency is improved during batch concrete volume linear deformation testing.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a concrete volume linear deformation testing device and a testing method. Background Art

[0002] The process of concrete from initial setting to final setting is a complex physical change and chemical reaction process. A large number of experimental studies have shown that the volume of concrete will shrink during the hardening process, and the degree of shrinkage deformation is affected by factors such as cement fineness, admixture type, temperature and humidity. Concrete begins to form strength after initial setting. The volume change from initial setting to final setting will produce more micro cracks. The volume change after final setting of concrete accelerates the development of later structural cracks. Structural cracks will affect the quality and safety of the entire construction, especially underground projects, structures under tensile stress or concrete projects with waterproofing requirements, which need to control the generation and development of cracks. In order to prevent the generation of cracks, admixtures such as magnesium expansion agents or calcium expansion agents are often added to the concrete mix to inhibit the shrinkage of concrete or achieve expansion. The amount of expansion agent added when designing the concrete mix needs to be determined based on the deformation of the concrete after 28 days of curing. The volume deformation of the entire process of concrete hardening after the addition of admixtures also needs to be verified by experiment.

[0003] The existing concrete volume linear deformation tester and test method (Announcement No.: CN110243268B) have at least the following disadvantages:

[0004] When the above patent is in use, fluid concrete is filled into the cylinder from the upper opening of the cylinder. During the filling process, steel bars are used to continuously tamp and insert. After the concrete is tamp and insert, a layer of slurry is formed on the surface, which is usually called "concrete slurry layer" or simply "slurry layer". This slurry is mainly composed of cement, water and fine-grained concrete gravel or sand. Because the slurry itself will also shrink or deform to a certain extent, and the hardening speed of the slurry is faster than that of the aggregate in the concrete, it will introduce a certain error in the volume linear deformation test, so it is necessary to remove the floating slurry on the surface. In the above patent, the slurry is scraped off manually, and the scraping speed is slow. When testing the volume linear deformation of batch concrete, the test efficiency is reduced. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a concrete volume linear deformation testing device and testing method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A concrete volume linear deformation testing device and testing method, comprising a cylinder, a conical tray and a curved support bowl, wherein the conical tray is arranged inside the cylinder, the curved support bowl is arranged above the conical tray, the inner wall of the curved support bowl is spherical, a water storage cylinder is fixedly installed on the bottom end of the conical tray, the conical tray is connected with the inside of the water storage cylinder, a plurality of water outlets are equidistantly penetrated on the circumferential outer surface of the conical tray, an annular groove is provided between the inner walls of the conical tray near the bottom, a conical bowl is slidably installed on the inner wall of the annular groove, a plurality of identical water outlets are equidistantly penetrated on the circumferential outer surface of the conical bowl, a plurality of water outlets are evenly provided on the bottom wall of the conical bowl, and the conical bowl is connected with the inside of the water storage cylinder through the water outlet.

[0008] As a further solution of the present invention, a plurality of guide grooves are equidistantly provided on the inner wall of the conical tray in the circumferential direction, a plurality of limit grooves are equidistantly provided on the inner wall of the conical tray in the circumferential direction, the plurality of guide grooves are respectively connected with the plurality of limit grooves, the limit grooves are arranged at the bottom of the guide grooves, and the limit grooves and the guide grooves are arranged perpendicular to each other.

[0009] As a further solution of the present invention, a plurality of protrusions are fixedly installed at equal intervals in the circumferential direction of the top of the conical bowl, the protrusions are slidably installed with the inner wall of the limiting groove, and the outer surface of the protrusion close to the guide groove is provided with a positioning notch, and the positioning notch is connected with the guide groove.

[0010] As a further solution of the present invention, a plurality of drive blocks are fixedly installed at equal intervals on the outer surface of the bottom end of the arc-surface support bowl in the circumferential direction. The drive blocks are slidably installed on the inner wall of the guide groove, and the drive blocks are matched with the positioning notches.

[0011] As a further solution of the present invention, a plurality of openings are evenly arranged on the circumferential outer surface of the water storage cylinder, and plug blocks are slidably installed on the inner walls of the plurality of openings, a rotating rod is fixedly installed on the lower surface at the center position of the conical bowl, a plurality of turntables are fixedly installed on the outer surface of the rotating rod in an aligned and equidistant manner, a plurality of guide grooves are equidistantly penetrated in the circumferential direction of the upper surface of the turntable, a guide column is fixedly installed on the lower surface of the plug block near one end of the rotating rod, and the guide column is slidably installed on the inner wall of the guide groove.

[0012] As a further scheme of the present invention, a base is fixedly installed at the bottom end of the cylinder, a plurality of legs are evenly fixedly installed on the lower surface of the base, a hexagonal sliding rod is fixedly installed on the upper surface of the base, a sliding sleeve is slidably installed on the outer surface of the hexagonal sliding rod, a bolt knob is inserted on the outer surface of the sliding sleeve, one end of the bolt knob is abutted against the outer surface of the hexagonal sliding rod, a fixing rod is fixedly installed on the outer surface of the sliding sleeve close to the cylinder, a through hole is provided on the outer surface of the fixing rod away from one end of the hexagonal sliding rod, a dial indicator is fixedly installed between the inner walls of the through hole, a contact rod is fixedly installed on the bottom end of the dial indicator, the bottom end of the contact rod is spherical, and the bottom end of the contact rod is abutted against the inner wall of the arc-surface support bowl.

[0013] As a further solution of the present invention, two supporting blocks are symmetrically fixedly installed on the lower surface of the base, a rotating shaft is rotatably installed between the two supporting blocks, a rotating wheel is fixedly installed on the outer surface of the rotating shaft, a plurality of pendulums are rotatably installed between the inner walls of the rotating wheels at equal intervals, the pendulums are against the lower surface of the base, and one end of the rotating shaft passes through the outer surface of the supporting block and a crank is fixedly installed.

[0014] As a further scheme of the present invention, the following steps are comprised:

[0015] S1: Fix the cylinder to the base through threaded connection, and then apply mold release oil to the inner wall of the cylinder and the base;

[0016] S2: The tester adds the concrete raw material to be tested into the cylinder from the top of the cylinder, and then manually drives the rotating shaft to rotate through the crank handle, so that the rotating shaft drives the rotating wheel to rotate, and the rotating wheel drives the pendulum to swing, so that the pendulum hits the lower surface of the base, and the cylinder vibrates by hitting the base;

[0017] S3: The tester inserts the water storage cylinder into the concrete raw material, trying to keep the water storage cylinder in the middle of the concrete, and inserts half of the conical tray into the concrete;

[0018] S4: The tester manually places the curved support bowl into the conical tray, and manually rotates the curved support bowl, which drives the conical bowl to rotate through the cooperation of the driving block and the positioning notch, so that the water outlet on the outer surface of the conical bowl is connected with the water outlet on the outer surface of the conical tray. At this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the interior of the conical bowl through the water outlet, and enter the interior of the water storage cylinder through the water outlet;

[0019] S5: After placing the arc-surface support bowl, the user unscrews the bolt knob and manually slides the sleeve up and down along the hexagonal slide rod. The sleeve drives the dial indicator to move up and down through the fixed rod. The tester adjusts the position of the dial indicator so that the contact rod at the bottom of the dial indicator abuts against the spherical inner wall of the arc-surface support bowl, and then tightens the bolt knob to fix its relative position with the hexagonal slide rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The arc-surface supporting bowl is manually rotated to drive the conical bowl to rotate through the cooperation of the driving block and the positioning notch. When the protrusion rotates to the end of the limit groove, the water outlet on the outer surface of the conical bowl is connected with the water outlet on the outer surface of the conical tray. At this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the inside of the conical bowl through the water outlet and enter the inside of the water storage cylinder through the water outlet. The device is convenient for real-time collection of slurry on the concrete surface. The speed of collecting slurry is fast, and there is no need for testers to manually scrape it. In the case of batch concrete volume linear deformation test, the test efficiency is improved;

[0022] 2. The rotating shaft is driven to rotate by the crank handle, so that the rotating shaft drives the rotating wheel to rotate, and the rotating wheel drives the pendulum to swing, so that the pendulum strikes the lower surface of the base, and the cylinder is driven to vibrate by striking the base, so that the concrete raw materials inside the cylinder are filled evenly by vibration, so as to avoid the presence of air inside the concrete, which leads to a decrease in the density of the concrete and affects the subsequent volume linear deformation test of the concrete;

[0023] 3. The rotating rod drives the turntable to rotate, and the turntable drives the guide groove to move. The guide groove drives the plug to be inserted into the concrete through the guide column. This device is convenient for increasing the contact area between the water storage cylinder and the concrete, ensuring that the water storage cylinder will not float in the concrete, so that the arc-surface support bowl at the top remains stable, and the accuracy of the test data is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a concrete volume linear deformation testing device proposed by the present invention;

[0025] Figure 2 This is a rear structural schematic diagram of a concrete volume linear deformation testing device proposed by the present invention;

[0026] Figure 3 A schematic diagram of the internal structure of a concrete volume linear deformation testing device proposed by the present invention;

[0027] Figure 4 A schematic diagram of a water storage cylinder of a concrete volume linear deformation testing device proposed by the present invention;

[0028] Figure 5A schematic diagram of a conical tray of a concrete volume linear deformation testing device proposed by the present invention;

[0029] Figure 6 A schematic cross-sectional view of a water storage cylinder of a concrete volume linear deformation testing device proposed by the present invention;

[0030] Figure 7 A schematic diagram of a curved support bowl of a concrete volume linear deformation testing device proposed by the present invention;

[0031] Figure 8 A schematic diagram of a conical bowl of a concrete volume linear deformation testing device proposed by the present invention;

[0032] Fig. 9 A schematic diagram of a turntable of a concrete volume linear deformation testing device proposed by the present invention;

[0033] Fig.10 for Figure 5 A partial enlarged schematic diagram in the middle.

[0034] In the figure: 1. cylinder; 2. hexagonal slide rod; 3. slide sleeve; 4. bolt knob; 5. fixing rod; 6. dial indicator; 7. support leg; 8. support block; 9. crank handle; 10. rotating shaft; 11. rotating wheel; 12. pendulum; 13. arc-surface supporting bowl; 14. conical tray; 15. water storage cylinder; 16. opening; 17. water outlet; 18. conical bowl; 19. protrusion; 20. driving block; 21. plug block; 22. guide column; 23. turntable; 24. guide groove; 25. rotating rod; 26. limit groove; 27. guide groove; 28. positioning notch. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Reference Figure 1-Figure 10 A concrete volume linear deformation test device and test method, comprising a cylinder 1, a conical tray 14 and a curved support bowl 13, wherein the conical tray 14 is arranged inside the cylinder 1, the curved support bowl 13 is arranged above the conical tray 14, the inner wall of the curved support bowl 13 is spherical, a water storage cylinder 15 is fixedly installed at the bottom end of the conical tray 14, the conical tray 14 is connected with the inside of the water storage cylinder 15, a plurality of water outlets 17 are evenly penetrated on the circumferential outer surface of the conical tray 14, an annular groove is provided between the inner walls of the conical tray 14 near the bottom, a conical bowl 18 is slidably installed on the inner wall of the annular groove, a plurality of identical water outlets 17 are evenly penetrated on the circumferential outer surface of the conical bowl 18, a plurality of water outlets are evenly provided on the bottom wall of the conical bowl 18, and the conical bowl 18 is connected to the inside of the water storage cylinder 15 through the water outlet. The conical tray 14 is connected to each other, and a plurality of guide grooves 27 are equidistantly provided on the circumferential direction of the inner wall of the conical tray 14, and a plurality of limit grooves 26 are equidistantly provided on the circumferential direction of the inner wall of the conical tray 14, and the plurality of guide grooves 27 are respectively connected to the plurality of limit grooves 26, and the limit grooves 26 are arranged at the bottom of the guide grooves 27, and the limit grooves 26 and the guide grooves 27 are arranged perpendicular to each other, and a plurality of protrusions 19 are equidistantly fixedly installed on the circumferential direction of the top end of the conical bowl 18, and the protrusions 19 are slidably installed on the inner wall of the limit grooves 26, and a positioning notch 28 is provided on the outer surface of the protrusion 19 near the guide groove 27, and the positioning notch 28 is connected to the guide groove 27, and a plurality of driving blocks 20 are equidistantly fixedly installed on the outer surface of the circumferential direction of the bottom end of the arc surface supporting bowl 13, and the driving blocks 20 are slidably installed on the inner wall of the guide groove 27, and the driving blocks 20 are matched with the positioning notch 28.

[0039] When in use, the tester fixes the cylinder 1 on the base through a threaded connection, and then applies mold release oil to the inner walls of the cylinder 1 and the base to facilitate subsequent testing. The solidified concrete can be easily taken out from the inside of the cylinder 1. The tester inserts the water storage cylinder 15 into the interior of the concrete raw material. When inserting, the water storage cylinder 15 is positioned in the middle of the concrete as much as possible, and half of the conical tray 14 is inserted into the concrete. After inserting the water storage cylinder 15, the tester manually places the arc-surface support bowl 13 into the interior of the conical tray 14. When placing, align the drive block 20 on the surface of the arc-surface support bowl 13 with the guide groove 27, and the drive block 20 slides along the guide groove 27 into the interior of the positioning notch 28 By manually rotating the arc-surface supporting bowl 13, the arc-surface supporting bowl 13 drives the conical bowl 18 to rotate through the cooperation of the driving block 20 and the positioning notch 28. When the protrusion 19 rotates to the end of the limiting groove 26, the water outlet 17 on the outer surface of the conical bowl 18 is connected with the water outlet 17 on the outer surface of the conical tray 14. At this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the interior of the conical bowl 18 along the water outlet 17, and enter the interior of the water storage cylinder 15 through the water outlet. The device is convenient for real-time collection of slurry on the concrete surface, and the speed of collecting slurry is fast, and there is no need for testers to manually scrape it. In the batch concrete volume linear deformation test, the test efficiency is improved.

[0040] In this embodiment, a plurality of openings 16 are evenly arranged on the circumferential outer surface of the water storage cylinder 15, and an insert block 21 is slidably installed on the inner walls of the plurality of openings 16. A rotating rod 25 is fixedly installed on the lower surface at the center position of the conical bowl 18, and a plurality of rotating disks 23 are fixedly installed on the outer surface of the rotating rod 25 in an aligned and equidistant manner from top to bottom. A plurality of guide grooves 24 are equidistantly penetrated in the circumferential direction of the upper surface of the rotating disk 23, and a guide column 22 is fixedly installed on the lower surface of the insert block 21 near one end of the rotating rod 25, and the guide column 22 is slidably installed on the inner wall of the guide groove 24.

[0041] The rotation of the conical bowl 18 drives the rotating rod 25 to rotate, so that the rotating rod 25 drives the turntable 23 to rotate, and the turntable 23 drives the guide groove 24 to move. The guide groove 24 drives the insert block 21 to be inserted into the concrete through the guide column 22. This device can increase the contact area between the water storage cylinder 15 and the concrete, ensure that the water storage cylinder 15 will not float in the concrete, keep the arc support bowl 13 at the top stable, and ensure the accuracy of the test data.

[0042] In this embodiment, a base is fixedly installed at the bottom end of the cylinder 1, and a plurality of legs 7 are evenly fixedly installed on the lower surface of the base, a hexagonal slide bar 2 is fixedly installed on the upper surface of the base, a sleeve 3 is slidably installed on the outer surface of the hexagonal slide bar 2, a bolt knob 4 is inserted on the outer surface of the sleeve 3, and one end of the bolt knob 4 is against the outer surface of the hexagonal slide bar 2, a fixing rod 5 is fixedly installed on the outer surface of the sleeve 3 close to the cylinder 1, and a through hole is provided on the outer surface of the fixing rod 5 away from one end of the hexagonal slide bar 2, a dial indicator 6 is fixedly installed between the inner walls of the through hole, and a contact rod is fixedly installed on the bottom end of the dial indicator 6, and the bottom end of the contact rod is spherical, and the bottom end of the contact rod is against the inner wall of the arc support bowl 13.

[0043] By unscrewing the bolt knob 4, the sliding sleeve 3 is manually slid up and down along the hexagonal sliding rod 2. The sliding sleeve 3 drives the dial indicator 6 to move up and down through the fixing rod 5. The tester adjusts the position of the dial indicator 6 so that the contact rod at its bottom abuts against the spherical inner wall of the arc-surface supporting bowl 13, and then fixes and tightens the bolt knob 4 to fix its relative position with the hexagonal sliding rod 2. Then, the data of the dial indicator 6 is reset to zero. The data of the dial indicator 6 is read regularly, and the linear deformation curve of the volume of concrete in the entire process from initial setting to final setting can be obtained.

[0044] In this embodiment, two supporting blocks 8 are symmetrically fixedly installed on the lower surface of the base, a rotating shaft 10 is rotatably installed between the two supporting blocks 8, a rotating wheel 11 is fixedly installed on the outer surface of the rotating shaft 10, and a plurality of pendulums 12 are rotatably installed between the inner walls of the rotating wheels 11 at equal intervals, the pendulums 12 are against the lower surface of the base, and one end of the rotating shaft 10 passes through the outer surface of the supporting block 8 and is fixedly installed with a crank handle 9.

[0045] The tester adds the concrete raw materials to be tested into the interior of the cylinder 1 from the nozzle at the top of the cylinder 1, and then manually drives the rotating shaft 10 to rotate through the crank 9, so that the rotating shaft 10 drives the rotating wheel 11 to rotate, and the rotating wheel 11 drives the pendulum 12 to swing, so that the pendulum 12 hits the lower surface of the base, and drives the cylinder 1 to vibrate by hitting the base, and the concrete raw materials inside the cylinder 1 are filled evenly through vibration, avoiding the presence of air inside the concrete, which leads to a decrease in the density of the concrete and affects the subsequent volume linear deformation test of the concrete.

[0046] In this embodiment, the following steps are included:

[0047] S1: Fix the cylinder 1 on the base through threaded connection, and then apply mold release oil to the inner walls of the cylinder 1 and the base;

[0048] S2: The tester adds the concrete raw material to be tested into the cylinder 1 from the cylinder mouth at the top of the cylinder 1, and then manually drives the rotating shaft 10 to rotate through the crank 9, so that the rotating shaft 10 drives the rotating wheel 11 to rotate, and the rotating wheel 11 drives the pendulum 12 to swing, so that the pendulum 12 knocks the lower surface of the base, and knocks the base to drive the cylinder 1 to vibrate;

[0049] S3: The tester inserts the water storage cylinder 15 into the concrete raw material, and tries to position the water storage cylinder 15 in the middle of the concrete, and inserts half of the conical tray 14 into the concrete;

[0050] S4: The tester manually places the arc-surface supporting bowl 13 into the conical tray 14, and manually rotates the arc-surface supporting bowl 13, which drives the conical bowl 18 to rotate through the cooperation of the driving block 20 and the positioning notch 28, so that the water outlet 17 on the outer surface of the conical bowl 18 is connected with the water outlet 17 on the outer surface of the conical tray 14. At this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the interior of the conical bowl 18 along the water outlet 17, and enter the interior of the water storage cylinder 15 through the water outlet;

[0051] S5: After placing the arc-surface supporting bowl 13, the user unscrews the bolt knob 4 and manually slides the sleeve 3 up and down along the hexagonal slide rod 2. The sleeve 3 drives the dial indicator 6 to move up and down through the fixed rod 5. The tester adjusts the position of the dial indicator 6 so that the contact rod at its bottom abuts against the spherical inner wall of the arc-surface supporting bowl 13, and then tightens the bolt knob 4 to fix its relative position with the hexagonal slide rod 2.

[0052] It should be noted that when the present invention is in use, the tester fixes the cylinder 1 on the base through a threaded connection, and then applies mold release oil to the inner walls of the cylinder 1 and the base, so that after the subsequent test is completed, the solidified concrete can be easily taken out from the inside of the cylinder 1; then the tester adds the concrete raw material to be tested into the inside of the cylinder 1 from the barrel mouth at the top of the cylinder 1, and then manually drives the rotating shaft 10 to rotate through the crank 9, so that the rotating shaft 10 drives the rotating wheel 11 to rotate, and the rotating wheel 11 drives the pendulum 12 to swing, so that the pendulum 12 strikes the lower surface of the base, and by striking the base, it drives the cylinder 1 to vibrate, and the concrete raw material inside the cylinder 1 is filled evenly through vibration, avoiding the presence of air inside the concrete, which leads to a decrease in the density of the concrete. , affecting the subsequent volume linear deformation test of concrete; after the concrete raw materials are filled evenly, the tester inserts the water storage cylinder 15 into the interior of the concrete raw materials, and tries to position the water storage cylinder 15 in the middle of the concrete during insertion, and inserts half of the conical tray 14 into the concrete. After inserting the water storage cylinder 15, the tester manually places the arc-surface support bowl 13 into the interior of the conical tray 14. When placing it, the driving block 20 on the surface of the arc-surface support bowl 13 is aligned with the guide groove 27, and the driving block 20 slides into the interior of the positioning notch 28 along the guide groove 27. By manually rotating the arc-surface support bowl 13, the arc-surface support bowl 13 drives the conical bowl 18 to rotate through the cooperation of the driving block 20 and the positioning notch 28. When the protrusion 19 rotates to the end of the limit groove 26 When the water outlet 17 on the outer surface of the conical bowl 18 is connected with the water outlet 17 on the outer surface of the conical tray 14, at this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the interior of the conical bowl 18 along the water outlet 17, and enter the interior of the water storage cylinder 15 through the water outlet. The device is convenient for real-time collection of slurry on the concrete surface, and the speed of collecting slurry is fast, and there is no need for testers to manually scrape it off. In the case of batch concrete volume linear deformation testing, the test efficiency is improved; at the same time, the rotation of the conical bowl 18 drives the rotating rod 25 to rotate, so that the rotating rod 25 drives the rotating disk 23 to rotate, and the rotating disk 23 drives the guide groove 24 to move, and the guide groove 24 drives the plug 21 to be inserted into the concrete through the guide column 22. The device is convenient for Increase the contact area between the water storage cylinder 15 and the concrete to ensure that the water storage cylinder 15 will not float in the concrete, keep the arc-surface supporting bowl 13 at the top stable, and ensure the accuracy of the test data; after placing the arc-surface supporting bowl 13, the user unscrews the bolt knob 4 to manually slide the sliding sleeve 3 up and down along the hexagonal sliding rod 2, and the sliding sleeve 3 drives the dial indicator 6 to move up and down through the fixed rod 5. The tester adjusts the position of the dial indicator 6 so that the contact rod at its bottom is against the spherical inner wall of the arc-surface supporting bowl 13, and then fixes and tightens the bolt knob 4 to fix its relative position with the hexagonal sliding rod 2, and then resets the data of the dial indicator 6 to zero, and reads the data of the dial indicator 6 regularly, so as to obtain the linear deformation curve of the volume of the concrete from initial setting to final setting.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A concrete volume linear deformation testing device, comprising a cylinder (1), a conical tray (14) and a curved support bowl (13), wherein the conical tray (14) is arranged inside the cylinder (1), the curved support bowl (13) is arranged above the conical tray (14), and the inner wall of the curved support bowl (13) is a spherical surface, characterized in that: A water storage cylinder (15) is fixedly mounted on the bottom end of the conical tray (14), the conical tray (14) is connected to the inside of the water storage cylinder (15), a plurality of water outlets (17) are equidistantly penetrated on the circumferential outer surface of the conical tray (14), a circular groove is provided between the inner walls of the conical tray (14) near the bottom end, a conical bowl (18) is slidably mounted on the inner wall of the circular groove, a plurality of identical water outlets (17) are equidistantly penetrated on the circumferential outer surface of the conical bowl (18), a plurality of water outlets are evenly disposed on the bottom wall of the conical bowl (18), and the conical bowl (18) is connected to the inside of the water storage cylinder (15) through the water outlets.

2. A concrete volume linear deformation testing device according to claim 1, characterized in that: A plurality of guide grooves (27) are equidistantly provided on the inner wall of the conical tray (14) in the circumferential direction, and a plurality of limit grooves (26) are equidistantly provided on the inner wall of the conical tray (14) in the circumferential direction. The plurality of guide grooves (27) are respectively connected to the plurality of limit grooves (26). The limit grooves (26) are arranged at the bottom of the guide grooves (27), and the limit grooves (26) and the guide grooves (27) are arranged perpendicular to each other.

3. A concrete volume linear deformation testing device according to claim 2, characterized in that: A plurality of protrusions (19) are fixedly mounted at equal intervals on the top of the conical bowl (18) in the circumferential direction. The protrusions (19) are slidably mounted on the inner wall of the limiting groove (26). A positioning notch (28) is formed on the outer surface of the protrusion (19) near the guide groove (27). The positioning notch (28) is communicated with the guide groove (27).

4. A concrete volume linear deformation testing device according to claim 3, characterized in that: A plurality of drive blocks (20) are fixedly mounted at equal intervals on the outer surface of the bottom end of the arc surface supporting bowl (13) in the circumferential direction. The drive blocks (20) are slidably mounted on the inner wall of the guide groove (27). The drive blocks (20) are matched with the positioning notches (28).

5. A concrete volume linear deformation testing device according to claim 4, characterized in that: The outer circumferential surface of the water storage cylinder (15) is evenly provided with a plurality of openings (16), and the inner walls of the plurality of openings (16) are all slidably provided with plug blocks (21), a rotating rod (25) is fixedly provided on the lower surface at the center of the conical bowl (18), a plurality of rotating disks (23) are fixedly provided on the outer surface of the rotating rod (25) in an aligned and equidistant manner, a plurality of guide grooves (24) are equidistantly provided through the upper surface of the rotating disk (23), a guide column (22) is fixedly provided on the lower surface of the plug block (21) near one end of the rotating rod (25), and the guide column (22) is slidably provided on the inner wall of the guide groove (24).

6. A concrete volume linear deformation testing device according to claim 1, characterized in that: A base is fixedly installed at the bottom end of the cylinder (1), and a plurality of legs (7) are evenly fixedly installed on the lower surface of the base. A hexagonal slide rod (2) is fixedly installed on the upper surface of the base. A sliding sleeve (3) is slidably installed on the outer surface of the hexagonal slide rod (2). A bolt knob (4) is inserted into the outer surface of the sliding sleeve (3). One end of the bolt knob (4) abuts against the outer surface of the hexagonal slide rod (2). A fixing rod (5) is fixedly installed on the outer surface of the sliding sleeve (3) close to the cylinder (1). A through hole is opened on the outer surface of the fixing rod (5) away from one end of the hexagonal slide rod (2). A dial indicator (6) is fixedly installed between the inner walls of the through hole. A contact rod is fixedly installed at the bottom end of the dial indicator (6). The bottom end of the contact rod is spherical and abuts against the inner wall of the arc-surface support bowl (13).

7. A concrete volume linear deformation testing device according to claim 6, characterized in that: Two support blocks (8) are symmetrically fixedly mounted on the lower surface of the base, a rotating shaft (10) is rotatably mounted between the two support blocks (8), a rotating wheel (11) is fixedly mounted on the outer surface of the rotating shaft (10), a plurality of pendulums (12) are rotatably mounted between the inner walls of the rotating wheels (11), the pendulums (12) are abutted against the lower surface of the base, and one end of the rotating shaft (10) passes through the outer surface of the support block (8) and is fixedly mounted with a crank handle (9).

8. A testing method for a concrete volume linear deformation testing device, characterized in that: A concrete volume linear deformation testing device according to any one of claims 1 to 7 is used, comprising the following steps: S1: Fix the cylinder (1) on the base through threaded connection, and then apply mold release oil to the inner walls of the cylinder (1) and the base; S2: The tester adds the concrete raw material to be tested into the interior of the cylinder (1) from the cylinder opening at the top of the cylinder (1), and then manually drives the rotating shaft (10) to rotate through the crank (9), so that the rotating shaft (10) drives the rotating wheel (11) to rotate, and the rotating wheel (11) drives the pendulum (12) to swing, so that the pendulum (12) strikes the lower surface of the base, and by striking the base, it drives the cylinder (1) to vibrate; S3: The tester inserts the water storage cylinder (15) into the concrete raw material, and tries to make the water storage cylinder (15) in the middle of the concrete, and inserts half of the conical tray (14) into the concrete; S4: The tester manually places the curved support bowl (13) inside the conical tray (14), and manually rotates the curved support bowl (13), so that the curved support bowl (13) drives the conical bowl (18) to rotate through the cooperation of the driving block (20) and the positioning notch (28), so that the water outlet (17) on the outer surface of the conical bowl (18) is connected with the water outlet (17) on the outer surface of the conical tray (14). At this time, the concrete surface is filled due to vibration, and the floating slurry generated will enter the interior of the conical bowl (18) along the water outlet (17), and enter the interior of the water storage cylinder (15) through the water outlet; S5: After placing the arc surface supporting bowl (13), the user manually slides the sliding sleeve (3) up and down along the hexagonal sliding rod (2) by unscrewing the bolt knob (4). The sliding sleeve (3) drives the dial indicator (6) to move up and down through the fixing rod (5). The tester adjusts the position of the dial indicator (6) so that the contact rod at the bottom of the dial indicator (6) abuts against the spherical inner wall of the arc surface supporting bowl (13), and then fixes and tightens the bolt knob (4) to fix the relative position of the dial indicator (6) with the hexagonal sliding rod (2).

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