CN217520901U - Concrete splitting test clamp - Google Patents
Concrete splitting test clamp Download PDFInfo
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- CN217520901U CN217520901U CN202221396514.XU CN202221396514U CN217520901U CN 217520901 U CN217520901 U CN 217520901U CN 202221396514 U CN202221396514 U CN 202221396514U CN 217520901 U CN217520901 U CN 217520901U
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Abstract
The utility model belongs to the technical field of concrete detection equipment, and particularly discloses a concrete splitting test fixture, which comprises a base, an upper pressure plate and a clamping unit, wherein the base is provided with four stand columns, and the upper pressure plate is connected with the four stand columns in a sliding manner; a lower gasket strip is arranged on the base, and an upper gasket strip is arranged at the bottom of the upper pressing plate; the clamping unit comprises a detachable clamping mechanism and two clamping seats which are opposite left and right, and the clamping seats are positioned between the upper pressure plate and the base, positioned between two adjacent upright posts and connected with the two adjacent upright posts in a sliding manner; can dismantle fixture is including the arc anchor clamps that are used for the square anchor clamps of centre gripping cube test piece and centre gripping cylinder test piece, and anchor clamps are including dismantling left anchor clamps and the right anchor clamps of connection on two grip blocks respectively. This test fixture both had been applicable to the cylinder test piece, was applicable to the cube test piece again.
Description
Technical Field
The utility model relates to a concrete detection equipment technical field especially relates to a concrete splitting test anchor clamps.
Background
The splitting tensile strength experiment of concrete adopts cube or cylinder test piece, in the central plane of test piece, acts on evenly distributed's pressure, makes the tensile stress of producing approximate equipartition in the vertical plane of exogenic action, and this tensile stress can calculate according to the elasticity theory. During the experiment, need fix concrete test piece anchor clamps for, adopt steel arc filler strip between press and test piece to should fill up with wooden three-ply board backing plate, the requirement of wooden three-ply board backing plate between steel filler strip and test piece: the width is 15-20 mm, the thickness is 3-4 mm, the length of the two padding strips (plates) is not less than the side length of the test piece, and the wooden padding plate cannot be reused. The test steps are as follows:
(1) the appearance of the test piece is checked first and the dimensions are measured.
(2) The top and bottom surfaces are scribed at the location of the cleavage plane during molding.
(3) And placing a test piece, an arc-shaped steel backing strip and a wooden backing plate. The axis of the test piece is aligned with the center of the lower pressure plate of the testing machine, and the pad strip is perpendicular to the top surface of the test piece during molding.
(4) Loading: when the compressive strength of the test piece is lower than 30MPa, the loading speed is 0.02-0.05 MPa/s, and when the compressive strength of the test piece is equal to or higher than 30MPa, the loading speed is 0.05-0.08 MPa/s. When the test piece is about to be damaged and the deformation rapidly increases, the adjustment of the accelerator of the testing machine is stopped until the test piece is damaged. The maximum load was recorded to the nearest 0.01 MPa.
At present, a plurality of concrete splitting test fixtures are available on the market, and the concrete splitting test fixtures are suitable for cubic test pieces, such as an asphalt concrete splitting test fixture disclosed in Chinese utility model patent CN214668175U and a concrete cubic splitting tensile strength test fixture disclosed in CN 216349985U; there is the concrete cylinder splitting tensile test anchor clamps that are applicable to the cylinder test piece as the utility model patent CN202710404U discloses in china, the concrete cylinder test piece splitting test fixture device that CN203606213U disclosed. Then above-mentioned test fixture can only be applicable to cube or cylinder concrete test piece, can't satisfy the centre gripping of two kinds of different shapes test pieces simultaneously.
In the actual test process, the filler strip and the hard fiber cushion layer are generally manually and directly placed on the press machine, but the direction of the splitting plane is not vertical to the pressure direction easily, so that the test precision is influenced; in addition, in the concrete splitting test, the concrete can bear the huge pressure of the press machine, and after the concrete is cracked, broken slag is easy to splash everywhere, so that testing personnel are injured or devices such as other instrument settings are damaged.
Is not only suitable for cylindrical test pieces, but also suitable for cubic test pieces, is also suitable for test pieces with different sizes, and can be automatically reset
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art, an object of the utility model is to provide a concrete splitting test fixture, both be applicable to the cylinder test piece, be applicable to the cube test piece again, can also be applicable to not unidimensional test piece.
In order to achieve the above objects and other related objects, the utility model provides a concrete splitting test fixture, which comprises a base, an upper pressing plate and a clamping unit, wherein the base is provided with four upright posts, and the four upright posts surround the base to form a square shape; the upper pressure plate is connected with the four upright posts in a sliding manner and can slide up and down along the upright posts; a lower backing strip is arranged on the base, an upper backing strip which is right opposite to the lower backing plate is arranged at the bottom of the upper pressing plate, and the opposite surfaces of the upper backing strip and the lower backing strip are both arc-shaped; the clamping unit comprises a detachable clamping mechanism and two clamping seats oppositely arranged left and right, and the clamping seats are positioned between the upper pressing plate and the base, positioned between two adjacent vertical columns and connected with the two adjacent vertical columns in a sliding manner; the detachable clamping mechanism comprises a square clamp and an arc clamp, the square clamp is used for clamping a cubic test piece, the arc clamp is used for clamping a cylindrical test piece, the clamp comprises a left clamp and a right clamp, and the left clamp and the right clamp are detachably connected to two clamping seats respectively.
Further, mounting grooves are formed in the opposite sides of the two clamping seats, the mounting grooves are semi-open grooves with open upper ends, and connecting blocks capable of being inserted into the mounting grooves are arranged at the rear ends of the left clamp and the right clamp; the tank bottom of mounting groove is equipped with the horizontal first screw hole that sets up and run through the holder of a plurality of, be equipped with on the connecting block a plurality of with first screw hole one-to-one's second screw hole, the centre gripping unit still include a plurality of with first screw hole and second screw hole assorted screw rod, and with screw rod matched with bolt. The left clamp and the right clamp are inserted into the mounting groove through the connecting blocks at the rear ends of the left clamp and the right clamp, then the screw rod is inserted into the second threaded hole through the first threaded hole, and the left clamp and the right clamp can be mounted on the left clamping seat and the right clamping seat after the bolts are tightened; on the contrary, the bolt is unscrewed, the screw rod is pulled out, and then the left clamp and the right clamp can be taken off from the clamping seat, so that the replacement of the clamps with two shapes (square and arc) is realized, and the test pieces with different shapes (cube and cylinder) are clamped. Meanwhile, the distance between the left clamp and the right clamp can be adjusted by adjusting the insertion depth of the connecting block in the mounting groove (the insertion depth is the depth in the horizontal direction), so that the test piece can be clamped, and the clamping of the test pieces with different sizes can be realized.
Further, the left clamp and the right clamp of the square clamp are respectively in a [ "," ] "type.
Furthermore, the left clamp and the right clamp of the square clamp both comprise a lower clamping block and an upper clamping block, the lower clamping block is L-shaped and comprises a vertical first vertical plate and a horizontal lower clamping plate, and the connecting block is arranged on the rear wall of the first vertical plate; the upper clamping block is in an inverted L shape and comprises a vertical second vertical plate and a horizontal upper clamping plate, and a groove into which the second vertical plate can be inserted is formed in the first vertical plate; the bottom of the second vertical plate is connected with the bottom of the groove through an elastic piece. In a natural state, the second vertical plate is inserted into the groove, and the distance between the upper clamping plate and the lower clamping plate can be adjusted by adjusting the insertion depth of the second vertical plate in the groove so as to clamp the cubic test pieces with different sizes; meanwhile, due to the arrangement of the elastic piece, a clamp formed by the upper clamping block and the lower clamping block can have certain clamping force so as to clamp the cubic test piece.
Further, the elastic member is a spring.
Further, the clamping ends (i.e. the front ends) of the left clamp and the right clamp of the arc-shaped clamp are arc-shaped surfaces.
Further, one side that the stand is close to the grip slipper is equipped with the spout, the both sides of grip slipper are equipped with the slider, slider sliding connection is in the spout.
Further, still be equipped with the elevating unit on the base, the elevating unit is used for driving the top board up-and-down motion to compress tightly the test piece.
Furthermore, the lifting unit is an electric telescopic rod, the electric telescopic rod comprises a multi-stage telescopic rod and a driving mechanism used for driving the multi-stage telescopic rod to perform telescopic motion, the multi-stage telescopic rod is vertically arranged, and one end, far away from the driving mechanism, of the multi-stage telescopic rod is connected with the bottom of the upper pressing plate.
Furthermore, four multi-stage telescopic rods are arranged on the base and are respectively connected with four corners of the bottom of the upper pressing plate so as to control the upper pressing plate to move up and down and keep stable.
Furthermore, four through holes corresponding to the four stand columns one to one are formed in the upper pressure plate.
Further, the upper cushion strip and the lower cushion strip are both steel cushion strips.
Further, this concrete splitting test anchor clamps set wooden upper padding plate and lower bolster, and during the experiment, the upper padding plate is placed between test piece and upper filler rod, and the lower bolster is placed between test piece and lower filler rod to keep the axis unanimous.
As above, the utility model discloses a concrete splitting test anchor clamps has following beneficial effect:
the concrete splitting test fixture provided by the utility model is provided with a detachable square fixture and an arc fixture, which is suitable for both a cylindrical test piece and a cubic test piece; meanwhile, through the arrangement of the mounting groove on the clamping seat, the first threaded hole, the connecting blocks on the left clamp and the right clamp, the second threaded hole, the screw and the bolt, the clamping device can be suitable for clamping test pieces with different sizes; moreover, the size of the square clamp can be adjusted, so that the concrete splitting test clamp can clamp cubic test pieces with different sizes; in addition, the lifting unit is arranged, so that the upper pressing plate can be controlled to move up and down, the upper pressing plate can be freely lifted, and labor is saved.
Drawings
Fig. 1 is a perspective view of a concrete splitting test fixture according to embodiment 1 of the present invention.
Fig. 2 shows a perspective view of a square fixture in the concrete splitting test fixture of embodiment 1 of the present invention.
Fig. 3 shows a left side view of the square clamp shown in fig. 2.
Fig. 4 shows a right side view of the square clamp shown in fig. 2.
Fig. 5 is a perspective view of the arc-shaped clamp in the concrete splitting test clamp according to embodiment 1 of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Description of the reference numerals
As shown in fig. 1, the concrete splitting test fixture provided by the utility model comprises a base 1, an upper press plate 2 and a clamping unit, wherein the base 1 is provided with four upright posts 3, and the four upright posts 3 are enclosed on the base 1 to form a square shape; the upper pressure plate 2 is connected with the four upright posts 3 in a sliding way and can slide up and down along the upright posts 3; specifically, the upper pressure plate 2 is provided with four through holes corresponding to the four upright posts 3 one by one.
Furthermore, in order to realize the up-and-down movement of the upper pressure plate 2 and save manpower, a lifting unit is arranged on the base 1 and used for driving the upper pressure plate 2 to move up and down so as to press the test piece. Specifically, the lift unit is four electric telescopic handle, and electric telescopic handle includes multi-stage telescopic rod 4 and is used for driving multi-stage telescopic rod 4 to carry out telescopic motion's actuating mechanism, and the vertical setting of multi-stage telescopic rod 4, four multi-stage telescopic rod 4 keep away from actuating mechanism's one end (be the upper end) and the four corners of 2 bottoms of top board link to each other to control top board 2 up-and-down motion, and keep steadily. The electric telescopic rod is the prior art, so that redundant description is omitted, and the driving mechanism can be a hydraulic pump or a structure consisting of a stepping motor, a gear, a rack and the like; its drive mechanism may be mounted inside the base 1 for aesthetic reasons. The base 1 is also provided with a switch button for controlling the electric telescopic rod.
A lower cushion strip 52 is arranged on the base 1, an upper cushion strip 51 which is opposite to the lower cushion plate 62 is arranged at the bottom of the upper pressing plate 2, and the opposite surfaces of the upper cushion strip 51 and the lower cushion strip 52 are both arc-shaped; the upper and lower beads 51, 52 are both steel beads. Meanwhile, the concrete splitting test fixture is provided with an upper cushion plate 61 and a lower cushion plate 62 which are made of wood, during testing, the upper cushion plate 61 is placed between the test piece and the upper cushion strip 51, and the lower cushion plate 62 is placed between the test piece and the lower cushion strip 52, and the axes are kept consistent.
The clamping unit comprises a detachable clamping mechanism and two clamping seats 7 which are oppositely arranged left and right, and the clamping seats 7 are positioned between the upper pressing plate 2 and the base 1, between two adjacent upright columns 3 and in sliding connection with the two adjacent upright columns 3; specifically, one side of the upright column 3 close to the clamping seat 7 is provided with a sliding groove 301, two sides of the clamping seat 7 are provided with sliding blocks 701, and the sliding blocks 701 are slidably connected in the sliding groove 301.
Can dismantle fixture is including the square anchor clamps that are used for centre gripping cube test piece and the arc anchor clamps that are used for centre gripping cylinder test piece, and anchor clamps comprise left anchor clamps and right anchor clamps, and left anchor clamps and right anchor clamps can be dismantled respectively and connect on two grip slipper 7.
Specifically, one side of each of the two clamping seats 7 opposite to each other is provided with a mounting groove 702, each mounting groove 702 is a semi-open groove with an open upper end, and the rear ends of the left clamp and the right clamp are provided with connecting blocks 8 which can be inserted into the mounting grooves 702; the bottom of the mounting groove 702 is provided with a plurality of first threaded holes 703 which are transversely arranged and penetrate through the clamping seat 7, the connecting block 8 is provided with a plurality of second threaded holes 801 which are one-to-one opposite to the first threaded holes 703, and the clamping unit further comprises a plurality of screws matched with the first threaded holes 703 and the second threaded holes 801 and bolts matched with the screws. The number of the first threaded holes 703 and the second threaded holes 801 may be two to three, and the first threaded holes and the second threaded holes may be horizontally arranged at intervals or vertically arranged at intervals, depending on the width and depth of the mounting groove 702.
When the clamping device is used, the left clamp and the right clamp are inserted into the mounting groove 702 through the connecting block 8 at the rear ends of the left clamp and the right clamp, then the screw rod is inserted into the second threaded hole 801 through the first threaded hole 703, and after the bolt is tightened, the left clamp and the right clamp can be mounted on the left clamping seat 7 and the right clamping seat 7; on the contrary, the bolt is unscrewed, the screw rod is pulled out, and then the left clamp and the right clamp can be taken off from the clamping seat 7, so that the replacement of the clamps with two shapes (square and arc) is realized, and the test pieces with different shapes (cube and cylinder) are clamped. Meanwhile, by adjusting the insertion depth of the connecting block 8 in the mounting groove 702 (the insertion depth here refers to the depth in the horizontal direction), the distance between the left clamp and the right clamp can be adjusted, the test piece can be clamped, and the clamping of the test pieces with different sizes can be realized.
As shown in fig. 2, the left and right clamps of the square clamp are of the "[", "]" type, respectively.
As shown in fig. 2, 3 and 4, each of the left and right clamps of the square clamp includes a lower clamping block 91 and an upper clamping block 92, the lower clamping block 91 is L-shaped and includes a vertical first vertical plate 911 and a horizontal lower clamping plate 912, and the connecting block 8 is disposed on the rear wall of the first vertical plate 911; the upper clamping block 92 is of an inverted L shape and comprises a vertical second vertical plate 921 and a horizontal upper clamping plate 922, and a groove 9111 for inserting the second vertical plate 921 is arranged in the first vertical plate 911; the bottom of the second vertical plate 921 is connected with the bottom of the groove 9111 through an elastic part, the elastic part can specifically adopt a spring 10, a plurality of springs 10 are arranged between the second vertical plate 921 and the groove 9111, and two ends of the spring 10 are respectively connected with the bottom of the second vertical plate 921 and the bottom of the groove 9111. In a natural state, the second vertical plate 921 is inserted into the groove 9111, and the distance between the upper clamping plate 922 and the lower clamping plate 912 can be adjusted by adjusting the insertion depth of the second vertical plate 921 in the groove 9111, so as to clamp the cubic test pieces with different sizes; meanwhile, due to the arrangement of the elastic piece, the clamp formed by the upper clamping block 92 and the lower clamping block 91 can have certain clamping force so as to clamp the cubic test piece.
Referring to fig. 5, the left and right clamp holding ends (i.e., front ends) of the arc clamp are arc surfaces.
This concrete splitting test anchor clamps are equipped with can dismantle fixture, through changing square anchor clamps and arc anchor clamps, both can the centre gripping cylinder test piece, can centre gripping cube test piece again, have satisfied the centre gripping demand of different shapes concrete test piece.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A concrete splitting test fixture is characterized by comprising a base, an upper pressure plate and a clamping unit, wherein the base is provided with four stand columns, and the four stand columns surround the base to form a square shape; the upper pressure plate is connected with the four upright posts in a sliding manner and can slide up and down along the upright posts; a lower gasket strip is arranged on the base, an upper gasket strip which is right opposite to the lower gasket strip is arranged at the bottom of the upper pressing plate, and the opposite surfaces of the upper gasket strip and the lower gasket strip are both arc-shaped; the clamping unit comprises a detachable clamping mechanism and two clamping seats oppositely arranged left and right, and the clamping seats are positioned between the upper pressing plate and the base, positioned between two adjacent vertical columns and connected with the two adjacent vertical columns in a sliding manner; the detachable clamping mechanism comprises a square clamp and an arc clamp, the square clamp is used for clamping a cubic test piece, the arc clamp is used for clamping a cylindrical test piece, the clamp comprises a left clamp and a right clamp, and the left clamp and the right clamp are detachably connected to two clamping seats respectively.
2. The concrete cleaving test jig of claim 1, wherein: the two clamping seats are arranged on the left side and the right side of the left clamp and the right clamp respectively, and the two clamping seats are arranged on the right side and the left side of the right clamp respectively; the tank bottom of mounting groove is equipped with the horizontal first screw hole that sets up and run through the holder of a plurality of, be equipped with on the connecting block a plurality of with first screw hole one-to-one's second screw hole, the centre gripping unit still include a plurality of with first screw hole and second screw hole assorted screw rod, and with screw rod matched with bolt.
3. The concrete splitting test fixture of claim 2, wherein: the left clamp and the right clamp of the square clamp are respectively of a [ "," ] "type.
4. The concrete cleaving test jig of claim 3, wherein: the left clamp and the right clamp of the square clamp respectively comprise a lower clamping block and an upper clamping block, the lower clamping block is L-shaped and comprises a vertical first vertical plate and a horizontal lower clamping plate, and the connecting block is arranged on the rear wall of the vertical plate; the upper clamping block is in an inverted L shape and comprises a vertical second vertical plate and a horizontal upper clamping plate, and a groove into which the second vertical plate can be inserted is formed in the first vertical plate; the bottom of the second vertical plate is connected with the bottom of the groove through an elastic piece.
5. The concrete cleaving test jig of claim 1, wherein: the clamping ends of the left clamp and the right clamp of the arc-shaped clamp are arc-shaped surfaces.
6. The concrete cleaving test jig of claim 1, wherein: one side that the stand is close to the grip slipper is equipped with the spout, the both sides of grip slipper are equipped with the slider, slider sliding connection is in the spout.
7. The concrete cleaving test jig of claim 1, wherein: the base is further provided with a lifting unit, and the lifting unit is used for driving the upper pressing plate to move up and down.
8. The concrete splitting test fixture of claim 7, wherein: the lifting unit is an electric telescopic rod, the electric telescopic rod comprises a multi-stage telescopic rod and a driving mechanism used for driving the multi-stage telescopic rod to perform telescopic motion, the multi-stage telescopic rod is vertically arranged, and one end, far away from the driving mechanism, of the multi-stage telescopic rod is connected with the bottom of the upper pressing plate.
9. The concrete cleaving test jig of claim 8, wherein: four multi-stage telescopic rods are arranged on the base and are respectively connected with four corners of the bottom of the upper pressure plate.
10. The concrete cleaving test jig of claim 1, wherein: and the upper pressing plate is provided with four through holes which are in one-to-one correspondence with the four stand columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221396514.XU CN217520901U (en) | 2022-06-06 | 2022-06-06 | Concrete splitting test clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221396514.XU CN217520901U (en) | 2022-06-06 | 2022-06-06 | Concrete splitting test clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217520901U true CN217520901U (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221396514.XU Active CN217520901U (en) | 2022-06-06 | 2022-06-06 | Concrete splitting test clamp |
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| Country | Link |
|---|---|
| CN (1) | CN217520901U (en) |
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2022
- 2022-06-06 CN CN202221396514.XU patent/CN217520901U/en active Active
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