CN212410270U

CN212410270U - Device for testing durability of tensile and reciprocating bending concrete

Info

Publication number: CN212410270U
Application number: CN202021131042.6U
Authority: CN
Inventors: 王孔; 王丽叶
Original assignee: Hainan Fangneng Test Technology Co ltd
Current assignee: Hainan Fangneng Test Technology Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-01-26
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses a device of test tensile and reciprocal crooked concrete durability relates to material check out test set field, including the concrete sample, the both ends outside of concrete sample all cup joints and is connected with clamping device, and clamping device includes hollow cover, and the inner chamber of hollow cover is provided with the stripper plate, and the stripper plate sets up to the arc, and the one end fixedly connected with arc baffle of stripper plate, a side of stripper plate are connected with the lateral wall laminating of concrete sample, and the elastic expansion part of another side middle part fixed connection of stripper plate. The utility model discloses a both sides at elastic expansion piece all are provided with the fixed block, and there is the eccentric wheel at the middle part of fixed block through round pin axle swing joint, and when tensile to the concrete sample, the stripper plate under the effect of frictional force with concrete sample relatively fixed, drive the eccentric wheel during hollow cover horizontal slip and rotate and extrude the stripper plate to make a plurality of stripper plates press from both sides tightly fixedly to the concrete sample.

Description

Device for testing durability of tensile and reciprocating bending concrete

Technical Field

The utility model relates to a material check out test set field, in particular to device of test tensile and reciprocal crooked concrete durability.

Background

Concrete is one of the most important civil engineering materials of the present generation. The artificial stone is prepared by a cementing material, granular aggregate (also called aggregate), water, an additive and an admixture which are added if necessary according to a certain proportion, and is formed by uniformly stirring, closely forming, curing and hardening, wherein the strength of the concrete is the most important mechanical property after the concrete is hardened, and refers to the capability of the concrete for resisting stress such as compression, tension, bending, shearing and the like. At present, the device of tensile and reciprocal crooked concrete durability of test of current is not convenient for fix the concrete sample to when doing tensile experiment, because the concrete is stretched, its diameter can diminish, easily because of not hard up the emergence between concrete sample and the clamping device drops, thereby leads to the failure of experiment.

Therefore, it is necessary to develop a device for testing the durability of the concrete in tension and bending to and fro to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device of tensile and reciprocal crooked concrete durability of test to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a device for testing the durability of stretched and reciprocally bent concrete comprises a concrete sample, wherein clamping devices are connected to the outer sides of two ends of the concrete sample in a sleeved mode and comprise hollow sleeves, extrusion plates are arranged in the inner cavities of the hollow sleeves and are arranged in an arc shape, one end of each extrusion plate is fixedly connected with an arc guide plate, one side face of each extrusion plate is connected with the outer side wall of the concrete sample in a fitted mode, elastic telescopic pieces are fixedly connected to the middle portions of the other side faces of the extrusion plates, one end of each elastic telescopic piece is fixedly connected with a limiting slide block, limiting slide grooves are formed in the inner walls of the hollow sleeves, the limiting slide blocks are located in the limiting slide grooves and are matched with the limiting slide grooves, fixed blocks are arranged on two sides of each elastic telescopic piece and fixedly connected with the inner walls of the hollow sleeves, and eccentric wheels are movably connected to the middle portions of the, the other side surface of the extrusion plate is connected with a rubber pad in an adhesive mode, and the outer side wall of the eccentric wheel is connected with the upper end face of the rubber pad in a fitting mode.

Preferably, the extrusion plate is provided with a plurality of extrusion plates, and a plurality of extrusion plates are distributed in an annular array.

Preferably, the limiting sliding grooves are arranged in a plurality of numbers, and the limiting sliding grooves are distributed on the inner wall of the hollow sleeve in an annular array.

Preferably, the side surface of the eccentric wheel is provided with a torsion spring, and two ends of the torsion spring are respectively and fixedly connected with the eccentric wheel and the fixing block.

Preferably, a base is arranged below the concrete sample, reaction frames are arranged on the outer sides of two ends of the concrete sample, and the lower end of each reaction frame is fixedly connected with the upper end face of the base.

Preferably, one end face of each of the two clamping devices is fixedly connected with a connecting rod and a first electric push rod respectively, and the connecting rods and the first electric push rods are fixedly connected with the two reaction frames respectively.

Preferably, the middle part outside of concrete sample cup joints and is connected with solid fixed ring, gu fixed ring's lateral wall fixedly connected with second electric putter, the lower extreme of second electric putter and the up end middle part fixed connection of base.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a fixedly connected with arc baffle at the one end of stripper plate, a side middle part fixedly connected with elastic expansion piece of stripper plate, elastic expansion piece's one end fixedly connected with spacing slider, spacing slider is located spacing spout and with spacing spout looks adaptation, with arc baffle cover in the one end of concrete sample, then horizontal slip stripper plate and compression elastic expansion piece, elastic expansion piece provides thrust can make the lower terminal surface of stripper plate closely laminate with the lateral wall of concrete sample to be convenient for install the concrete sample;

2. the utility model discloses a both sides at elastic expansion piece all are provided with the fixed block, and there is the eccentric wheel at the middle part of fixed block through round pin axle swing joint, and when tensile to the concrete sample, the stripper plate under the effect of friction force with concrete sample relatively fixed, drive the eccentric wheel during hollow cover horizontal slip and rotate and extrude the stripper plate to make a plurality of stripper plates press from both sides tight fixed to the concrete sample, even the concrete sample becomes thin because of drawing, the stripper plate also can press from both sides the concrete sample tightly.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic side sectional view of the structure at a-a in fig. 1 according to the present invention.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.

Fig. 4 is a schematic structural section view of the clamping device of the present invention.

In the figure: 1. a concrete sample; 2. a clamping device; 3. a hollow sleeve; 4. a pressing plate; 41. an arc-shaped guide plate; 5. an elastic extensible member; 6. a limiting slide block; 61. a limiting chute; 7. a fixed block; 8. an eccentric wheel; 9. a rubber pad; 10. a base; 11. a reaction frame; 12. a connecting rod; 13. a first electric push rod; 14. a fixing ring; 15. a second electric push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a device for testing the durability of stretching and reciprocating bending concrete as shown in figures 1-4, as shown in figure 1, comprising a concrete sample 1, wherein the outer sides of both ends of the concrete sample 1 are respectively connected with a clamping device 2 in a sleeved manner, the clamping device 2 can clamp and fix the concrete sample 1, a base 10 is arranged below the concrete sample 1, the outer sides of both ends of the concrete sample 1 are respectively provided with a reaction frame 11, the lower end of the reaction frame 11 is fixedly connected with the upper end surface of the base 10, one end surfaces of the two clamping devices 2 are respectively fixedly connected with a connecting rod 12 and a first electric push rod 13, the connecting rod 12 and the first electric push rod 13 are respectively fixedly connected with the two reaction frames 11, the connecting rod 12 can fix the position of one clamping device 2, the first electric push rod 13 can stretch, when the first electric push rod 13 stretches, the concrete sample 1 can be stretched, the middle part outside of concrete sample 1 cup joints and is connected with solid fixed ring 14, gu fixed ring 14's lateral wall fixedly connected with second electric putter 15, second electric putter 15's lower extreme and base 10's up end middle part fixed connection, second electric putter 15 can drive solid fixed ring 14 vertical slip when flexible to can carry out the reciprocal crooked durability experiment to concrete sample 1.

As shown in fig. 2, the clamping device 2 includes a hollow sleeve 3, an inner cavity of the hollow sleeve 3 is provided with a plurality of extrusion plates 4, the extrusion plates 4 are distributed in an annular array, the extrusion plates 4 are arranged in an arc shape, one side surface of each extrusion plate 4 is in fit connection with the outer side wall of the concrete sample 1, the middle part of the other side surface of each extrusion plate 4 is fixedly connected with an elastic extensible member 5, each elastic extensible member 5 includes a spring and an extensible rod, the springs are sleeved outside the extensible rods, the elastic extensible members 5 provide thrust to enable one side surface of each extrusion plate 4 to be in close fit with the outer side wall of the concrete sample 1, one end of each elastic extensible member 5 is fixedly connected with a limit slider 6, two sides of each elastic extensible member 5 are respectively provided with a fixed block 7, the fixed blocks 7 are fixedly connected with the inner wall of the hollow sleeve 3, the middle parts of the fixed blocks, the side of eccentric wheel 8 is provided with the torsional spring, the both ends of torsional spring respectively with eccentric wheel 8 and fixed block 7 fixed connection, the torsional spring provides torsion makes the lateral wall of eccentric wheel 8 be connected with the laminating of another side of stripper plate 4 all the time.

As shown in fig. 3, a limiting sliding groove 61 is formed in the inner wall of the hollow sleeve 3, the limiting sliding groove 61 is provided with a plurality of limiting sliding grooves 61, the plurality of limiting sliding grooves 61 are distributed in an annular array on the inner wall of the hollow sleeve 3, a limiting sliding block 6 is located in the limiting sliding groove 61 and is matched with the limiting sliding groove 61, the limiting sliding block 6 can slide in the limiting sliding groove 61, a rubber pad 9 is connected to the other side face of the extrusion plate 4 in a bonding mode, the outer side wall of the eccentric wheel 8 is connected with the upper end face of the rubber pad 9 in a bonding mode, and the friction force between the eccentric wheel 8 and the.

As shown in fig. 4, an arc guide plate 41 is fixedly connected to one end of the compression plate 4, and the arc guide plate 41 is provided to further facilitate the insertion of the concrete sample 1 between the plurality of compression plates 4.

The utility model discloses the theory of operation:

when the device is used, one end of a concrete sample 1 is inserted into the inner cavity of one clamping device 2, at the moment, the side wall of one end of the concrete sample 1 is contacted with the arc-shaped guide plates 41 and is extruded, the concrete sample 1 slides and drives the limiting slide block 6 to slide in the inner cavity of the limiting slide groove 61 until the limiting slide block 6 is contacted with the inner wall of one end of the limiting slide groove 61, at the moment, the limiting slide block 6 is limited, the concrete sample 1 continues to slide, the concrete sample 1 is inserted among the extrusion plates 4, the elastic extensible part 5 is compressed, the elastic extensible part 5 provides thrust, so that one side face of each extrusion plate 4 is tightly attached to the outer side wall of the concrete sample 1, and the other clamping device 2 is sleeved at the other end of the concrete sample 1 in the same way;

during stretching, shrink first

electric putter

13, 2 horizontal sliding of another clamping device, 3 horizontal sliding of hollow cover this moment, the frictional force that produces between the lateral wall of stripper plate 4 and concrete sample 1 makes between stripper plate 4 and the concrete sample 1 relatively fixed, promptly, stripper plate 4 takes place relative sliding with hollow cover 3, eccentric wheel 8 takes place to rotate under the effect of frictional force, thereby extrude stripper plate 4, the frictional force that produces between eccentric wheel 8 and the stripper plate 4 makes between hollow cover 3 and the stripper plate 4 relatively fixed, promptly, can drive stripper plate 4 when hollow cover 3 slides and remove, thereby can stretch concrete sample 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. An apparatus for testing the durability of tensile and reciprocating flexural concrete, comprising a concrete sample (1), characterized in that: the concrete sample (1) is characterized in that clamping devices (2) are connected to the outer sides of two ends of the concrete sample (1) in a sleeved mode, each clamping device (2) comprises a hollow sleeve (3), an extrusion plate (4) is arranged in an inner cavity of each hollow sleeve (3), each extrusion plate (4) is arranged to be arc-shaped, an arc-shaped guide plate (41) is fixedly connected to one end of each extrusion plate (4), one side face of each extrusion plate (4) is connected with the outer side wall of the concrete sample (1) in a fitted mode, an elastic telescopic piece (5) is fixedly connected to the middle of the other side face of each extrusion plate (4), a limiting sliding block (6) is fixedly connected to one end of each elastic telescopic piece (5), a limiting sliding groove (61) is formed in the inner wall of each hollow sleeve (3), each limiting sliding block (6) is located in each limiting sliding groove (61) and matched with each limiting sliding groove (61, the inner wall fixed connection of fixed block (7) and hollow cover (3), there is eccentric wheel (8) at the middle part of fixed block (7) through round pin axle swing joint, another side adhesive joint of stripper plate (4) has rubber pad (9), the lateral wall of eccentric wheel (8) and the up end laminating of rubber pad (9) are connected.

2. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 1, wherein: the extrusion plate (4) is provided with a plurality of, a plurality of extrusion plate (4) are the annular array and distribute.

3. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 2, wherein: the limiting sliding grooves (61) are arranged in a plurality of annular arrays, and the limiting sliding grooves (61) are distributed on the inner wall of the hollow sleeve (3) in an annular array mode.

4. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 3, wherein: the side of eccentric wheel (8) is provided with the torsional spring, the both ends of torsional spring respectively with eccentric wheel (8) and fixed block (7) fixed connection.

5. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 4, wherein: the concrete sample (1) is provided with a base (10) below, the two ends of the concrete sample (1) are provided with reaction frames (11), and the lower ends of the reaction frames (11) are fixedly connected with the upper end face of the base (10).

6. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 5, wherein: one end face of each of the two clamping devices (2) is fixedly connected with a connecting rod (12) and a first electric push rod (13) respectively, and the connecting rods (12) and the first electric push rods (13) are fixedly connected with the two reaction frames (11) respectively.

7. The apparatus for testing the durability of concrete in tension and reciprocating bending according to claim 6, wherein: the middle part outside of concrete sample (1) cup joints and is connected with solid fixed ring (14), the lateral wall fixedly connected with second electric putter (15) of solid fixed ring (14), the lower extreme of second electric putter (15) and the up end middle part fixed connection of base (10).