CN114454297A - Over-vibration prevention vibration table - Google Patents
Over-vibration prevention vibration table Download PDFInfo
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- CN114454297A CN114454297A CN202210149730.2A CN202210149730A CN114454297A CN 114454297 A CN114454297 A CN 114454297A CN 202210149730 A CN202210149730 A CN 202210149730A CN 114454297 A CN114454297 A CN 114454297A
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- 230000002265 prevention Effects 0.000 title description 4
- 238000012360 testing method Methods 0.000 claims abstract description 94
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000003825 pressing Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
- B28B2001/0876—Supports, e.g. tables, therefor
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Abstract
The invention relates to an anti-over-vibration vibrating table which comprises a vibrating table top and a top plate fixed above the vibrating table top through two vertical plates, wherein an aggregate rake matched with a test mold is hung on the top plate through a lifting assembly, and when the test mold is fixed on the vibrating table top, the aggregate rake can extend into the test mold and move up and down in the test mold, so that aggregates settled due to vibration are salvaged and are brought back again and dispersed into concrete slurry on the upper part of the test mold; the vibrating table further comprises a plurality of sliding locking assemblies, the testing mold can be clamped and arranged on the vibrating table top, and the sliding locking assemblies can be further provided with anti-splash plates, so that concrete is prevented from splashing outside the testing mold in the vibrating process.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to an anti-over-vibration table for manufacturing a concrete test block.
Background
In the construction process of building, when concrete pouring is carried out, a concrete test block is often required to be sampled and manufactured so as to detect the relevant performance of the concrete. Commonly used concrete test blocks include cylindrical, vertical/rectangular, etc., wherein the latter are more practical; the test block size mainly includes a cube with sides of 100mm and 150mm, a cuboid with sides of 100mm x 400mm and 150mm x 300mm, and the like. The concrete test block needs to be vibrated and compacted in the manufacturing process so as to discharge gas mixed in the feeding process. The vibrating process can be realized by a vibrating table or manual vibration, wherein the vibrating table has the advantages of high efficiency, convenience and the like, and is widely adopted at present.
GB/T50081-2019 Standard methods for testing mechanical properties of concrete has the following requirements for manufacturing concrete test blocks by adopting a vibrating table: the vibration table is used for compacting to manufacture a test piece according to the following method: 1) loading the concrete mixture into a test mold at one time, and inserting and tamping the concrete mixture along the inner wall of the test mold by using a spatula during loading, wherein the concrete mixture is higher than the upper opening of the test mold; 2) the test mold is adhered or fixed on the vibration table, free jumping of the test mold on the vibration table is prevented during vibration, and the vibration is continued until the surface is subjected to slurry discharge and no obvious large bubbles overflow, so that excessive vibration is avoided. However, in this standard, no explanation is made on the specific meaning and judgment standard of "no significant bubble escape" and "excessive vibration". Therefore, in the actual implementation process, there is still a lack of a basis for judgment that can be followed, resulting in different judgments for "no obvious large bubble escaping" and "excessive vibration" by different persons, and further causing differences in the manufacturing process of test blocks manufactured by different operators, even the same operator, in different batches, and finally affecting the accuracy of the detection result.
In fact, the "no significant air bubble escape" and "no excessive vibration" required in the above standards are essentially a pair of spears, the former requiring tapping for a sufficiently long time to expel the gas as much as possible; the latter requires that tapping cannot be performed for an excessive time. Under the condition that the standard does not provide a judgment basis of related indexes, how to ensure that gas is fully discharged and over-vibration is avoided; or how to take a trade off and balance between air exhaust and over-vibration prevention becomes a great problem in the concrete test block manufacturing process.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an anti-over-vibration table. The vibrating table of the invention can effectively solve the contradiction between sufficient exhaust and over-vibration prevention, and allows the exhaust sufficiency to be ensured by prolonging the vibration time, and simultaneously prevents the structural defect of the test block caused by over-vibration in the prolonged vibration time through proper means.
Specifically, the invention provides the following technical scheme: an anti-over-vibration vibrating table comprises a bottom plate 1 and a plurality of telescopic supporting columns 2 fixed on the bottom plate 1, wherein a vibrating table top 3 is fixed at the tops of the supporting columns 2, a test mold 12 is placed on the top surface of the vibrating table top 3, and a first vibrating motor 4 is fixed at the bottom of the vibrating table top 3; the top of the vibration table top 3 is relatively provided with two vertical plates 5, and the top ends of the two vertical plates 5 are fixedly connected through a top plate 6. The top plate 6 is provided with a lifting component 8 penetrating through the top plate 6, the bottom of the lifting component 8 is detachably provided with a bone rake 9, the bone rake 9 can be set to be capable of extending into the test mold 12 and moving up and down in the test mold 12 when the test mold 12 is fixed on the vibration table board 3, the distance between rake teeth of the bone rake 9 is 1.3-1.5 times of the equivalent size of bone in the used concrete, so that when the bone rake 9 moves downwards, the bone can move to the position above the bone rake 9 through the clearance between the rake teeth, and when the bone rake moves upwards, the bone can slowly leak out from the clearance between the rake teeth, the bone settled due to vibration can be salvaged through the up-and-down movement of the bone rake 9, and the bone settled due to vibration can be brought back again and dispersed into the concrete slurry on the upper part of the test mold, and the separation of the concrete after long-time vibration can be prevented.
Still be equipped with a plurality of second vibrating motor 7 on the roof 6, second vibrating motor 7 can through two risers 5 with lifting unit 8 is respectively to vibration table surface 3 and aggregate harrow 9 output vibration to make the test block manufacturing process, all provide corresponding vibration in the interior both sides of examination mould, strengthen gas outgoing's speed in the concrete. Meanwhile, the vibration output to the aggregate rake 9 can also improve the passing effect of the aggregates in the rake tooth gaps, and prevent the aggregates from bridging between the rake teeth, so that the aggregates cannot effectively pass through the rake tooth gaps.
Still be provided with slip locking subassembly 10 between roof 6 and the vibration mesa 3, slip locking subassembly 10 is used for being fixed in the vibration mesa 3 with examination mould 12 on, the both sides of lifting unit 8 are provided with the locking subassembly 10 of a relative setting respectively to can compress tightly the locking with the relative both sides limit of this lifting unit 8 assorted examination mould 12, prevent that examination mould 12 from slipping because of the vibration during the test block preparation and beating. The top surface of the vibration table top 3 and the bottom surface of the top plate 6 are respectively provided with a slideway 11 matched with the sliding locking component 10.
The sliding locking assembly 10 comprises a supporting column 13 and a trapezoidal block 14 fixed at the bottom of the supporting column 13, wherein a lower sliding block 15 matched with the slideway 11 on the top surface of the vibration table 13 is arranged in the middle of the bottom surface of the trapezoidal block 14; an inverted trapezoidal block 16 is fixed at the top of the supporting column 13, and an upper sliding block 17 matched with the sliding way 11 on the bottom surface of the top plate 6 is fixed in the middle of the top surface of the inverted trapezoidal block 16. The height from the bottom surface of the trapezoidal block 14 to the top surface of the inverted trapezoidal block 16 is equal to the height from the top surface of the vibration table 13 to the bottom surface of the top plate 6, so that the slide lock assembly 10 can provide proper support between the vibration table 13 and the top plate 6 and can better transmit the vibration generated by the second vibration motor 7.
The sliding locking assembly 10 further comprises a sliding sleeve 18 sleeved on the outer surface of the supporting column 13; a locking piece 19 is arranged on the sliding sleeve 18, and the locking piece 19 is used for locking the sliding sleeve 18 at a specific height of the supporting column 13; a pressing piece 20 is fixedly arranged on one side or two opposite sides of the sliding sleeve 18, and the pressing piece 20 is used for abutting against and pressing the top of the test mold 12, so that the test mold 12 is fixed on the vibration table top 13; the locking member 19 can be a locking structure known in the art, such as a bolt, and when the locking member 19 is released, the sliding sleeve 18 can drive the pressing member 20 to slide up and down along the supporting column 13, so that the test molds 12 with different sizes can be adapted.
The pressing member 20 includes a vertical plate 21 vertically disposed and a horizontal plate 22 away from the sliding sleeve 18 and vertically disposed on an upper end of the vertical plate 21. The vertical plate 21 is used for being attached to the outer side wall of the test mold 12, and the horizontal plate 22 is used for pressing the top edge of the test mold 12.
The top of the transverse plate 22 is provided with a clamping groove 23, the clamping groove 23 is used for installing a splash guard, the splash guard comprises a full-side plate 24, the bottom of the full-side plate is provided with a matching block 26 matched with the clamping groove 23, and two ends of the full-side plate 24 are respectively and vertically provided with a half-side plate 25; the distance between the two half-side plates 25 is equal to the length of the inner opening edge of the test mold 12 matched with the full-side plate 24, and meanwhile, the size of the half-side plate 25 protruding out of the full-side plate 24 is equal to half of the length of the inner opening edge of the test mold 12 matched with the half-side plate 25, so that when the splash guards are installed on the upper portions of the pressing pieces 20 arranged on the two opposite side walls of the test mold 12, the half-side plates 25 of the two oppositely arranged splash guards just abut against each other, and the two splash guards enclose an inner cavity with the same cross-sectional size as the test mold 12. At least the inner surface of the splash shield is subjected to hydrophobic treatment to prevent the concrete from sticking.
The splash guard is effective in preventing concrete in the test mold 12 from splashing to the outside, and the size of the splash guard and the surface subjected to the conveying treatment enable the concrete which is splashed by vibration and intercepted by the splash guard to fall back into the test mold 12 again.
The lifting assembly 8 comprises a rotary shaft having a lower end provided with an external threaded section 28 and a sleeve 27 threadedly engaged with the external threaded section 28 such that the sleeve 27 can perform a lifting motion when the rotary shaft is rotated. The thread fit may be achieved by providing an internal thread on at least an upper section of the inner wall of the sleeve 27, or by fixing a nut or other internally threaded attachment to the inner wall of the sleeve 27. The present invention preferably provides internal threads on the inner wall of the sleeve 27 to allow good contact of the sleeve 27 with the rotating shaft, which facilitates the transmission of vibrations to the bone rake 9.
The rotating shaft is fixedly provided with a bearing 29 at the upper end of the external thread section 28, and the bearing 29 allows the rotating shaft to be hung on the top plate 6 and is in rotating fit with the top plate; the rotating shaft is provided with a driving part 30 above the bearing 29, and the driving part 30 is used for connecting external drive to enable the rotating shaft to rotate. The driving unit 30 may be a gear, a pulley, a hand wheel, etc. as a driving unit known in the art, and the present invention is not limited thereto.
The bone material harrow 9 comprises a longitudinal rod 32 fixed at the bottom end of a sleeve 27 and a plurality of transverse rods 31 symmetrically arranged at two sides of the longitudinal rod 32, wherein a harrow tooth gap is formed between every two adjacent transverse rods 31, and the width of the harrow tooth gap is 1.3-1.5 times of the equivalent size of used aggregate.
Preferably, a plurality of steel wires 33 are arranged at intervals on both sides of the bottom end of the cross rod 31; the pitch of the steel wires 33 is 1.1 to 1.5 times the equivalent size of the used aggregate, and the steel wires 33 have appropriate flexibility that allows the steel wires 33 not to be deformed by touching the slurry but to be deformed by touching the aggregate when they are lifted and lowered with the aggregate rake 9.
The steel wire 33 of the present invention is important, and on one hand, the steel wire 33 may have a distance smaller than the rake teeth gap, so that the steel wire can be matched with the cross bar 31 to reinforce the lifting action of the aggregate, and prevent the aggregate above the cross bar 31 from rapidly sinking, and on the other hand, the steel wire 33 has a small or even negligible diameter and is disposed at the bottom of the cross bar 31, so that it can make up for the defect that the cross bar 31 cannot effectively touch and lift the aggregate deposited on the bottom plate of the test mold 12 due to the large diameter of the steel wire.
2, 3, 4 or 6 test molds 12 can be placed on the vibration table top 3, wherein each test mold 12 is matched with one telescopic assembly 8 and two pressing pieces 20 arranged on two opposite sides of the telescopic assembly. Such an arrangement allows for multiple test blocks to be made simultaneously in a parallel experimental manner, improving the accuracy and confidence of the test results.
The width of the top plate 6 is smaller than the width of the vibration table 3, and this arrangement allows sufficient operating space for trial molding, splash plate pick and place, and concrete addition to be provided between the top plate 6 and the vibration table 3.
Compared with the prior art, the invention can at least obtain the following beneficial effects: the liftable aggregate rake can continuously prevent the aggregate from sinking during vibration, and the sunk aggregate is scooped up again and uniformly dispersed in the concrete slurry, so that the concrete segregation phenomenon caused by vibration is effectively resisted, excessive vibration is prevented, and longer-time vibration is allowed, and air mixed in the concrete is fully discharged; since the excessive vibration is effectively overcome in the invention, during the experiment, the same reference standard can be adopted to manufacture the test block, for example, the vibration treatment is carried out for the same time under the appropriate intensity, and the same time can exceed the upper limit of the vibration time in the prior art, so that the different experimental batches can be fully exhausted; the sliding locking assembly can effectively adapt to test molds of different specifications and allows parallel experiments to be carried out so as to prepare a plurality of test blocks simultaneously; the vibration test bed can transmit vibration to concrete through the test mould and the aggregate harrow at the same time, compared with the mode that the traditional vibration table can only transmit vibration through the test mould, the vibration test bed has higher vibration exhaust effect, the vibration intensity difference received by the concrete at each position in the test mould is greatly reduced, and the structural difference between the edge of the test block and the inner core is reduced; according to the invention, the steel wire with proper elasticity is arranged at the bottom of the aggregate rake, so that the aggregate on the bottom plate of the test mold can be effectively touched and lifted, and the structural uniformity of the test block is further ensured. The detachable aggregate rake and the splash guard of the invention allow replacement to adapt to different test mold sizes and different aggregate sizes, so that the vibrating table of the invention has wider applicability.
Drawings
FIG. 1 is a three-dimensional schematic view of an anti-overstibration vibration table;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a three-dimensional schematic view of the slide lock assembly;
FIG. 4 is a three-dimensional schematic view of the sliding sleeve and the compressing member;
FIG. 5 is a three-dimensional schematic view of a splash plate;
FIG. 6 is a schematic view of two splash plates abutting against each other on a test mold;
FIG. 7 is a schematic view of the lift assembly;
FIG. 8 is a three-dimensional schematic view of a bone rake;
fig. 9 is a schematic view of three test molds being installed simultaneously.
In the figure: the device comprises a base plate 1, a support column 2, a vibration table top 3, a first vibration motor 4, a vertical plate 5, a top plate 6, a second vibration motor 7, a lifting assembly 8, an aggregate rake 9, a sliding locking assembly 10, a sliding locking assembly 11, a test mold 12, a support column 13, a trapezoidal block 14, a lower sliding block 15, an inverted trapezoidal block 16, an upper sliding block 17, a sliding sleeve 18, a locking member 19, a pressing member 20, a vertical plate 21, a transverse plate 22, a transverse plate 23, a clamping groove 24, a full-side plate 24, a half-side plate 25, a matching block 26, a sleeve 27, an external thread section 28, a bearing 29, a driving part 30, a longitudinal rod 31, a transverse rod 32 and a steel wire 33.
Detailed Description
An anti-over-vibration vibrating table comprises a bottom plate 1 and a plurality of telescopic supporting columns 2 fixed on the bottom plate 1, wherein a vibrating table top 3 is fixed at the tops of the supporting columns 2, a test mold 12 is placed on the top surface of the vibrating table top 3, and a first vibrating motor 4 is fixed at the bottom of the vibrating table top 3; the top of the vibration table top 3 is relatively provided with two vertical plates 5, and the top ends of the two vertical plates 5 are fixedly connected through a top plate 6. The top plate 6 is provided with a lifting component 8 penetrating through the top plate 6, the bottom of the lifting component 8 is detachably provided with a bone rake 9, the bone rake 9 can be set to be capable of extending into the test mold 12 and moving up and down in the test mold 12 when the test mold 12 is fixed on the vibration table board 3, the distance between rake teeth of the bone rake 9 is 1.3-1.5 times of the equivalent size of bone in the used concrete, so that when the bone rake 9 moves downwards, the bone can move to the position above the bone rake 9 through the clearance between the rake teeth, and when the bone rake moves upwards, the bone can slowly leak out from the clearance between the rake teeth, the bone settled due to vibration can be salvaged through the up-and-down movement of the bone rake 9, and the bone settled due to vibration can be brought back again and dispersed into the concrete slurry on the upper part of the test mold, and the separation of the concrete after long-time vibration can be prevented.
Still be equipped with a plurality of second vibrating motor 7 on the roof 6, second vibrating motor 7 can through two risers 5 with lifting unit 8 is respectively to vibration table surface 3 and aggregate harrow 9 output vibration to make the test block manufacturing process, all provide corresponding vibration in the interior both sides of examination mould, strengthen gas outgoing's speed in the concrete. Meanwhile, the vibration output to the aggregate rake 9 can also improve the passing effect of the aggregates in the rake tooth gaps, and prevent the aggregates from bridging between the rake teeth, so that the aggregates cannot effectively pass through the rake tooth gaps.
Still be provided with slip locking subassembly 10 between roof 6 and the vibration mesa 3, slip locking subassembly 10 is used for being fixed in the vibration mesa 3 with examination mould 12 on, the both sides of lifting unit 8 are provided with the locking subassembly 10 of a relative setting respectively to can compress tightly the locking with the relative both sides limit of this lifting unit 8 assorted examination mould 12, prevent that examination mould 12 from slipping because of the vibration during the test block preparation and beating. The top surface of the vibration table top 3 and the bottom surface of the top plate 6 are respectively provided with a slideway 11 matched with the sliding locking component 10.
The sliding locking assembly 10 comprises a supporting column 13 and a trapezoidal block 14 fixed at the bottom of the supporting column 13, wherein a lower sliding block 15 matched with the slideway 11 on the top surface of the vibration table 13 is arranged in the middle of the bottom surface of the trapezoidal block 14; an inverted trapezoidal block 16 is fixed at the top of the supporting column 13, and an upper sliding block 17 matched with the sliding way 11 on the bottom surface of the top plate 6 is fixed in the middle of the top surface of the inverted trapezoidal block 16. The height from the bottom surface of the trapezoidal block 14 to the top surface of the inverted trapezoidal block 16 is equal to the height from the top surface of the vibration table 13 to the bottom surface of the top plate 6, so that the slide lock assembly 10 can provide proper support between the vibration table 13 and the top plate 6 and can better transmit the vibration generated by the second vibration motor 7.
The sliding locking assembly 10 further comprises a sliding sleeve 18 sleeved on the outer surface of the supporting column 13; a locking piece 19 is arranged on the sliding sleeve 18, and the locking piece 19 is used for locking the sliding sleeve 18 at a specific height of the supporting column 13; a pressing piece 20 is fixedly arranged on one side or two opposite sides of the sliding sleeve 18, and the pressing piece 20 is used for abutting against and pressing the top of the test mold 12, so that the test mold 12 is fixed on the vibration table top 13; the locking member 19 can be a locking structure known in the art, such as a bolt, and when the locking member 19 is released, the sliding sleeve 18 can drive the pressing member 20 to slide up and down along the supporting column 13, so that the test molds 12 with different sizes can be adapted.
The pressing member 20 includes a vertical plate 21 vertically disposed and a horizontal plate 22 away from the sliding sleeve 18 and vertically disposed on an upper end of the vertical plate 21. The vertical plate 21 is used for being attached to the outer side wall of the test mold 12, and the horizontal plate 22 is used for pressing the top edge of the test mold 12.
The top of the transverse plate 22 is provided with a clamping groove 23, the clamping groove 23 is used for installing a splash guard, the splash guard comprises a full-side plate 24, the bottom of the full-side plate is provided with a matching block 26 matched with the clamping groove 23, and two ends of the full-side plate 24 are respectively and vertically provided with a half-side plate 25; the distance between the two half-side plates 25 is equal to the length of the inner opening edge of the test mold 12 matched with the full-side plate 24, and meanwhile, the size of the half-side plate 25 protruding out of the full-side plate 24 is equal to half of the length of the inner opening edge of the test mold 12 matched with the half-side plate 25, so that when the splash guards are installed on the upper portions of the pressing pieces 20 arranged on the two opposite side walls of the test mold 12, the half-side plates 25 of the two oppositely arranged splash guards just abut against each other, and the two splash guards enclose an inner cavity with the same cross-sectional size as the test mold 12. At least the inner surface of the splash shield is subjected to hydrophobic treatment to prevent the concrete from sticking.
The splash guard is effective in preventing concrete in the test mold 12 from splashing to the outside, and the size of the splash guard and the surface subjected to the conveying treatment enable the concrete which is splashed by vibration and intercepted by the splash guard to fall back into the test mold 12 again.
The lifting assembly 8 comprises a rotary shaft having a lower end provided with an external threaded section 28 and a sleeve 27 threadedly engaged with the external threaded section 28 such that the sleeve 27 can perform a lifting motion when the rotary shaft is rotated. The thread fit may be achieved by providing an internal thread on at least an upper section of the inner wall of the sleeve 27, or by fixing a nut or other internally threaded attachment to the inner wall of the sleeve 27. The present invention preferably provides internal threads on the inner wall of the sleeve 27 to allow good contact of the sleeve 27 with the rotating shaft, which facilitates the transmission of vibrations to the bone rake 9.
The rotating shaft is fixedly provided with a bearing 29 at the upper end of the external thread section 28, and the bearing 29 allows the rotating shaft to be hung on the top plate 6 and is in rotating fit with the top plate; the rotating shaft is provided with a driving part 30 above the bearing 29, and the driving part 30 is used for connecting external drive to enable the rotating shaft to rotate. The driving unit 30 may be a gear, a pulley, a hand wheel, etc. as a driving unit known in the art, and the present invention is not limited thereto.
The bone material harrow 9 comprises a longitudinal rod 32 fixed at the bottom end of a sleeve 27 and a plurality of transverse rods 31 symmetrically arranged at two sides of the longitudinal rod 32, wherein a harrow tooth gap is formed between every two adjacent transverse rods 31, and the width of the harrow tooth gap is 1.3-1.5 times of the equivalent size of used aggregate.
Preferably, a plurality of steel wires 33 are arranged at intervals on both sides of the bottom end of the cross rod 31; the spacing between the steel wires 33 is 1.1-1.5 times of the equivalent size of the used aggregate, and the steel wires 33 have appropriate flexibility, which allows the steel wires 33 not to be deformed by touching the slurry but to be deformed by touching the aggregate when lifting with the aggregate rake 9.
The steel wire 33 of the present invention is important, and on one hand, the steel wire 33 may have a distance smaller than the rake teeth gap, so that the steel wire can be matched with the cross bar 31 to reinforce the lifting action of the aggregate, and prevent the aggregate above the cross bar 31 from rapidly sinking, and on the other hand, the steel wire 33 has a small or even negligible diameter and is disposed at the bottom of the cross bar 31, so that it can make up for the defect that the cross bar 31 cannot effectively touch and lift the aggregate deposited on the bottom plate of the test mold 12 due to the large diameter of the steel wire.
2, 3, 4 or 6 test molds 12 can be placed on the vibration table surface 3, wherein each test mold 12 is matched with a telescopic assembly 8 and two pressing pieces 20 arranged at two opposite sides of the test mold. Such an arrangement allows for multiple test blocks to be made simultaneously in a parallel experimental manner, improving the accuracy and confidence of the test results.
The width of the top plate 6 is smaller than the width of the vibration table 3, and this arrangement allows sufficient operating space for trial molding, splash plate pick and place, and concrete addition to be provided between the top plate 6 and the vibration table 3.
The above are only examples of preferred embodiments of the invention, which should not be construed as limiting the invention to all possible embodiments thereof, the scope of which is defined by the claims.
Claims (10)
1. An anti-over-vibration table comprises a bottom plate 1 and a plurality of telescopic support columns 2 fixed on the bottom plate 1, wherein vibration table surfaces 3 are fixed at the tops of the support columns 2; the method is characterized in that: the top of the vibration table top 3 is oppositely provided with two vertical plates 5, and the top ends of the two vertical plates 5 are fixedly connected through a top plate 6; the top plate 6 is provided with a lifting component 8 penetrating through the top plate 6, the bottom of the lifting component 8 is detachably provided with a bone rake 9, and the bone rake 9 can be arranged to extend into the test mold 12 and move up and down in the test mold 12 when the test mold 12 is fixed on the vibration table top 3, so that aggregates settled due to vibration can be salvaged and brought back again and dispersed into the concrete slurry on the upper part of the test mold.
2. The anti-overstrike vibration table as defined in claim 1, wherein: the space between the rake teeth of the aggregate rake 9 is 1.3 to 1.5 times of the equivalent size of the used aggregate.
3. The anti-overstrike vibration table as defined in claim 1, wherein: still be equipped with a plurality of second vibrating motor 7 on the roof 6, second vibrating motor 7 can be through two risers 5 with lifting unit 8 is respectively to vibration mesa 3 and aggregate harrow 9 output vibration.
4. The anti-overstrike vibratory table of claim 1, wherein: still be provided with between roof 6 and the vibration mesa 3 and slide locking subassembly 10, the both sides of lifting unit 8 are provided with the relative slip locking subassembly 10 that sets up respectively, and it can compress tightly the locking with the relative both sides limit of this lifting unit 8 assorted examination mould 12, the top surface of vibration mesa 3 with the bottom surface of roof 6 be provided with respectively with slide 11 of slide locking subassembly 10 assorted.
5. The anti-overstrike vibration table as defined in claim 4, wherein: the sliding locking assembly 10 comprises a support column 13 and a sliding sleeve 18 sleeved on the outer surface of the support column 13; a locking piece 19 is arranged on the sliding sleeve 18; a pressing piece 20 is fixedly arranged on one side or two opposite sides of the sliding sleeve 18, and the pressing piece 20 is used for abutting against and pressing the top of the test mould 12; two ends of the supporting column 13 are respectively provided with a trapezoidal block 14 and an inverted trapezoidal block 16, and one end faces of the trapezoidal block 14 and the inverted trapezoidal block 16 are respectively provided with a sliding block matched with the sliding way 11.
6. The anti-chatter table as defined in claim 5, wherein: the pressing piece 20 comprises a vertical plate 21 which is vertically arranged and a horizontal plate 22 which is far away from the sliding sleeve 18 and is vertically arranged at the upper end of the vertical plate 21; the top of the transverse plate 22 is provided with a clamping groove 23, the clamping groove 23 is used for installing a splash guard, the splash guard comprises a full-side plate 24, the bottom of the full-side plate is provided with a matching block 26 matched with the clamping groove 23, and two ends of the full-side plate 24 are respectively and vertically provided with a half-side plate 25; the distance between the two half-side plates 25 is equal to the length of the inner opening edge matched with the test mould 12 and the full-side plate 24, and meanwhile, the size of the half-side plate 25 protruding out of the full-side plate 24 is equal to half of the length of the inner opening edge matched with the test mould 12 and the half-side plate 25.
7. The anti-overstrike vibration table as defined in claim 1, wherein: the lifting assembly 8 comprises a rotating shaft and a sleeve 27, wherein the lower end of the rotating shaft is provided with an external thread section 28, and the sleeve 27 is in threaded fit with the external thread section 28; the rotating shaft is fixedly provided with a bearing 29 at the upper end of the external thread section 28, and the bearing 29 allows the rotating shaft to be hung on the top plate 6 and is in rotating fit with the top plate; a driving unit 30 is provided above the bearing 29.
8. An anti-overstrike vibration table as defined in claim 9, wherein: the bone material harrow 9 comprises a longitudinal rod 32 fixed at the bottom end of a sleeve 27 and a plurality of transverse rods 31 symmetrically arranged at two sides of the longitudinal rod 32, wherein a harrow tooth gap is formed between every two adjacent transverse rods 31, and the width of the harrow tooth gap is 1.3-1.5 times of the equivalent size of used aggregate.
9. An anti-overstrike vibration table as defined in claim 8, wherein: a plurality of steel wires 33 are arranged at both sides of the bottom end of the cross rod 31 at intervals; the pitch of the steel wires 33 is 1.1 to 1.5 times the equivalent size of the used aggregate, and the steel wires 33 have appropriate flexibility that allows the steel wires 33 not to be deformed by touching the slurry but to be deformed by touching the aggregate when they are lifted and lowered with the aggregate rake 9.
10. An anti-shake vibration table as in any of claims 1-9, wherein: 2, 3, 4 or 6 test molds 12 can be placed on the vibration table top 3, wherein each test mold 12 is matched with one telescopic assembly 8 and two pressing pieces 20 arranged on two opposite sides of the telescopic assembly.
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| CN202210149730.2A CN114454297B (en) | 2022-02-18 | 2022-02-18 | Vibration table capable of preventing over vibration |
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| CN202210149730.2A CN114454297B (en) | 2022-02-18 | 2022-02-18 | Vibration table capable of preventing over vibration |
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| EP1875996A1 (en) * | 2006-07-03 | 2008-01-09 | Quadra 1 | Vibrating press for the production of construction elements |
| CN206690260U (en) * | 2017-05-09 | 2017-12-01 | 北京市第二建筑工程有限责任公司 | A kind of concrete plain bumper with clamping device |
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| CN114454297B (en) | 2023-11-24 |
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