A concrete test block creep measuring device

Abstract

A kind of concrete test block creep measuring device, it includes placement plate, support vertical pole, crossbeam, pressure device, measuring device, pressure basket;Placement plate is equipped with leveling bolt and leveling bubble;Support vertical pole lower end is fixed on placement plate, top is equipped with rotating device;Crossbeam left end is fixed on rotating device, crossbeam can rotate in vertical plane around rotating device, crossbeam is equipped with scale;Pressure device is composed of pressure vertical pole and pressure plate, pressure vertical pole lower end is connected pressure plate, upper end is connected crossbeam;Measuring device includes measuring vertical pole and dial gauge, measuring vertical pole upper part is connected crossbeam, lower end is connected dial gauge;Pressure basket upper end is hung on crossbeam.The device amplifies gravity force value by lever principle and applies on the concrete test block to be measured, can reduce the amount of weight, reduce the space occupied by weight, amplifies concrete test block creep by lever principle, is convenient for recording, record measurement data can be obtained concrete test block creep.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of civil engineering, especially to the technical field of concrete creep of civil engineering, in particular to a concrete test block compression creep measuring device. BACKGROUND

[0002] Concrete compression creep is an important indicator to measure the performance of concrete. There are many types of concrete creep measuring devices today, and their structures are different, each with its own advantages.

[0003] However, the existing concrete test block compression creep measuring device still has some shortcomings, mainly: the hydraulic method is used to load the concrete test block during the test, which is more convenient, but the hydraulic loading system is high in cost and complex in control, and there is a problem of pressure loss during long time loading; using weights such as weights for loading is convenient and stable in pressure, but it has the disadvantages of requiring many weights and occupying a large volume. SUMMARY

[0004] The present application provides a device for measuring the compression creep of concrete test blocks, which can use the principle of lever to amplify the applied force and creep, facilitating load application and creep measurement.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] The present application provides a concrete test block creep measuring device, which comprises a placing plate, a support vertical rod, a crossbeam, a pressure applying device, a measuring device, and a pressure applying basket. The placing plate is provided with leveling bolts and leveling bubbles. The support vertical rod is perpendicular to the placing plate, with the lower end fixed to the left side of the placing plate and the top provided with a rotating device that can rotate in the vertical plane. One end of the crossbeam is fixed to the rotating device of the support vertical rod, and the crossbeam rotates around the rotating device in the vertical plane, with a scale provided on the crossbeam. The pressure applying device is composed of a pressure applying vertical rod and a pressure applying plate, with the lower end of the pressure applying vertical rod detachably fixed to the pressure applying plate and the upper end fixed to the crossbeam. The measuring device is composed of a measuring vertical rod and a micrometer, with the upper part of the measuring vertical rod detachably rotatably connected to the crossbeam and the micrometer fixed to the lower end of the measuring vertical rod. The pressure applying basket is hung on the crossbeam at the upper end, and the inside of the pressure applying basket is placed with weights or other heavy objects.

[0007] The placing plate is a rectangular steel plate with a smooth surface and a certain rigidity.

[0008] The placing plate is provided with leveling bolts at the four corners, and the adjacent two sides of the placing plate are provided with leveling bubbles, which are arranged perpendicular to each other.

[0009] A narrow steel plate is welded to the bottom of the placing plate.

[0010] The support vertical rod is a telescopic vertical rod with certain rigidity, which is composed of two thick-walled steel pipes with different pipe diameters, and the steel pipes are provided with reserved bolt holes, and the bolts are fixed by butt joint through different bolt holes.

[0011] The cross beam is a horizontal rod with certain rigidity, which is made of steel.

[0012] The pressure applying vertical rod is a solid steel rod, the lower end of the pressure applying vertical rod is provided with a thread, and the center of the pressure plate is provided with a threaded blind hole, and the pressure applying vertical rod is connected through the thread.

[0013] The pressure plate has various shapes, such as circular and square, and different shapes of pressure plates are used according to different cross-sectional shapes of the concrete test block.

[0014] The measuring vertical rod is made of a narrow steel plate, a plurality of bolt holes are arranged in the vertical direction, the measuring vertical rod is fixed on the cross beam through the bolts, and the horizontal position and vertical height of the measuring vertical rod can be adjusted.

[0015] The bottom of the pressure applying hanging basket is made of a thin steel plate, the surrounding of the bottom is made of a steel wire mesh, the top of the pressure applying hanging basket is provided with a circular ring, the circular ring moves horizontally on the cross beam, and the pressure applying hanging basket is hung on the cross beam through the circular ring.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The present application has the advantages of simple structure, convenient operation, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application has the advantages of simple structure, convenient operation, and the like.

[0019] Figure 2 The present application has the advantages of simple structure, convenient operation, and the like.

[0020] Figure 3 The present application has the advantages of simple structure, convenient operation, and the like.

[0021] Figure 4 The present application has the advantages of simple structure, convenient operation, and the like.

[0022] Markings in the drawings:

[0023] 1-putting plate, 2-support vertical rod, 3-cross beam, 4-pressure applying device, 5-measuring device, 6-pressure applying hanging basket, 7-concrete test block.

[0024] 11-leveling bolt, 12-leveling bubble, 13-narrow steel plate.

[0025] 21 - rotating device.

[0026] 41 - pressure application vertical rod, 42 - pressure application plate.

[0027] 51 - measurement vertical rod, 52 - micrometer. DETAILED DESCRIPTION

[0028] The present application is further described in the detailed description that follows, in connection with the accompanying drawings, wherein the same or similar reference numerals are used to identify the same or similar components throughout the several views. The detailed description is included to provide a further understanding of the present application, and is not intended to limit the present application in any way. The present application is described in the context of particular implementations and is not intended to be limited to only those implementations. Any number of modifications, additions and substitutions can be made by one of ordinary skill in the art without departing from the scope of the present application.

[0029] Reference is made to Figures 1-4The application provides a concrete test block creep measuring device, which comprises a placing plate 1, a supporting vertical rod 2, a crossbeam 3, a pressure applying device 4, a measuring device 5 and a pressure applying hanging basket 6. The placing plate 1 is a rectangular steel plate with a smooth surface and a certain rigidity; leveling bolts 11 are arranged at the four corners of the placing plate 1; leveling bubbles 12 are arranged on two adjacent sides of the placing plate 1, and the two leveling bubbles 12 are arranged perpendicularly to each other; the placing plate 1 is adjusted to a horizontal state by adjusting the leveling bolts 11 and observing the leveling bubbles 12; a narrow steel plate 13 is welded at the bottom of the placing plate 1, and the narrow steel plate 13 can increase the rigidity of the placing plate 1 and reduce the longitudinal deformation of the placing plate 1. The supporting vertical rod 2 is a telescopic vertical rod with a certain rigidity, which can be vertically telescoped on the placing plate 1; the supporting vertical rod 2 is composed of two thick-wall steel pipes with different pipe diameters, and the steel pipes are provided with reserved bolt holes; the bolts can be fixed by the different bolt holes. The lower end of the supporting vertical rod 2 is fixed on the left side of the placing plate 1, and a rotating device 21 is arranged at the top of the supporting vertical rod 2; the rotating device 21 can rotate in a vertical plane. The crossbeam 3 is a horizontal rod with a certain rigidity, which is made of steel; the left end of the crossbeam 3 is fixed on the rotating device 21 of the supporting vertical rod 2, and the crossbeam 3 can rotate in a vertical plane around the rotating device 21; a scale is arranged on the crossbeam 3, which can determine the relative positions of the pressure applying device 4, the measuring device 5 and the pressure applying hanging basket 6. The pressure applying device 4 is composed of a pressure applying vertical rod 41 and a pressure applying plate 42; the pressure applying vertical rod 41 is a solid steel rod; the lower end of the pressure applying vertical rod 41 is detachably fixedly connected with the pressure applying plate 42, and the upper end of the pressure applying vertical rod 41 is fixedly connected with the crossbeam 3; the lower end of the pressure applying vertical rod 41 is provided with a thread, and the center of the pressure applying plate 42 is provided with a thread blind hole, which is connected with the pressure applying vertical rod 41 through thread action; the pressure applying plate 42 has various shapes, such as a circular shape and a square shape, and different shapes of the pressure applying plate 42 can be used according to different cross-sectional shapes of the concrete test block 7. The measuring device 5 is composed of a measuring vertical rod 51 and a micrometer 52; the upper part of the measuring vertical rod 51 is detachably rotatably connected with the crossbeam 3; the measuring vertical rod 51 is made of a narrow steel plate and is provided with a plurality of bolt holes in the vertical direction; the measuring vertical rod 51 is fixed on the crossbeam 3 through the bolts, and the horizontal position and the vertical height of the measuring vertical rod 51 are adjustable; the micrometer 52 is fixed at the lower end of the measuring vertical rod 51. The upper end of the pressure applying hanging basket 6 is hung on the crossbeam 3; the bottom of the pressure applying hanging basket 6 is made of a thin steel plate, the periphery of the pressure applying hanging basket 6 is made of a steel wire mesh, a circular ring is arranged at the top of the pressure applying hanging basket 6, the circular ring can move horizontally on the crossbeam 3, the pressure applying hanging basket 6 is connected with the crossbeam 3 through the circular ring, and the inside of the pressure applying hanging basket 6 can place weights or other heavy objects; according to the principle of lever, the force is amplified, and the force is applied on the concrete test block 7 to be measured through the crossbeam 3 and the pressure applying device 4.

[0030] The measuring method of the creep measuring device is as follows:

[0031] S1, the placing plate 1 of the measuring device is placed on a flat and hard ground, and the placing plate 1 is adjusted to be horizontal by observing the leveling bubbles 12 and adjusting the leveling bolts 11.

[0032] S2, according to the cross-sectional shape of the concrete block 7 to be measured, select the appropriate pressure plate 42, and then according to the height of the concrete block 7 to be measured, the height of the support column 2 is extended to the appropriate position, and the support column 2 is fixed with bolts.

[0033] S3, adjust the pressure device 4, the measuring device 5 and the pressure basket 6 to the design position, the distance from the pressure device 4, the measuring device 5 and the pressure basket 6 to the center of the rotating device 21 is a, b, c respectively.

[0034] S4, record the force F0 transmitted by the pressure plate 42 when the pressure basket 6 is empty.

[0035] S5, according to the required creep test design load size force value F of the test, calculate the weight of the required load

[0036] S6, place the concrete block 7 to be measured in the center of the lower side of the pressure plate 42, and adjust the height of the measuring device 5.

[0037] S7, fix the measuring column 51 and the micrometer 52, fix the micrometer 52 at the lower part of the measuring column 51, and adjust the height of the micrometer 52 to the appropriate height.

[0038] S8, place the weight G of the weight or other heavy object in the pressure basket 6.

[0039] S9, record the deformation data m measured by the micrometer, and calculate the creep of the concrete block 7 at different ages l is the length of the pressure column 41, EA is the tensile stiffness of the pressure column 41, and EI is the bending stiffness of the beam 3.

Claims

1. A device for measuring the creep of a concrete test block, characterized by: The creep measuring device comprises a placing plate (1), a supporting vertical rod (2), a crossbeam (3), a pressure applying device (4), a measuring device (5) and a pressure applying hanging basket (6); the placing plate (1) is provided with leveling bolts (11) and leveling bubbles (12), and the bottom of the placing plate (1) is welded with a narrow steel plate (13); the supporting vertical rod (2) is a telescopic vertical rod, which is perpendicular to the placing plate (1), the lower end of the supporting vertical rod (2) is fixed on one side of the placing plate (1), the top of the supporting vertical rod (2) is provided with a rotating device (21), and the rotating device (21) can rotate in a vertical plane; one end of the crossbeam (3) is fixed on the rotating device (21) of the supporting vertical rod (2), the crossbeam (3) rotates around the rotating device (21) in the vertical plane, and the crossbeam (3) is provided with a scale; the pressure applying device (4) comprises a pressure applying vertical rod (41) and a pressure applying plate (42), the lower end of the pressure applying vertical rod (41) is fixedly connected with the pressure applying plate (42), the upper end of the pressure applying vertical rod (41) is fixedly connected with the crossbeam (3), and different shapes of the pressure applying plate (42) are used according to different cross-sectional shapes of the concrete test block (7); the measuring device (5) comprises a measuring vertical rod (51) and a micrometer (52), the upper part of the measuring vertical rod (51) is rotatably connected with the crossbeam (3), the measuring vertical rod (51) is provided with a plurality of bolt holes in the vertical direction, the measuring vertical rod (51) is fixed on the crossbeam (3) through the bolts, the horizontal position and the vertical height of the measuring vertical rod (51) can be adjusted, and the micrometer (52) is fixed on the lower end of the measuring vertical rod (51); the upper end of the pressure applying hanging basket (6) is hung on the crossbeam (3), the top of the pressure applying hanging basket (6) is provided with a circular ring, the circular ring moves horizontally on the crossbeam (3), the pressure applying hanging basket (6) is hung on the crossbeam (3) through the circular ring, and the pressure applying hanging basket (6) is internally provided with weights or other heavy objects.

2. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The placing plate (1) is a rectangular steel plate, the surface of which is flat and has a certain rigidity.

3. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The placing plate (1) is provided with leveling bolts (11) at four corners; adjacent two sides of the placing plate (1) are provided with leveling bubbles (12), and the two leveling bubbles (12) are arranged perpendicularly to each other.

4. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The supporting vertical rod (2) is a telescopic vertical rod with a certain rigidity, which is composed of two thick-walled steel pipes with different pipe diameters, the steel pipes are provided with reserved bolt holes, and the bolts are fixedly connected through different bolt holes.

5. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The crossbeam (3) is a horizontal rod with a certain rigidity, which is made of steel.

6. The creep measuring apparatus for concrete test blocks according to claim 1, characterized in that: The pressure applying vertical rod (41) is a solid steel rod; the lower end of the pressure applying vertical rod (41) is provided with a thread, and the center of the pressure applying plate (42) is provided with a threaded blind hole, so as to be connected with the pressure applying vertical rod (41) through thread action.

7. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The pressure applying plate (42) is circular or square.

8. The creep measuring device for concrete test blocks according to claim 1, characterized in that: The measuring vertical rod (51) is made of a narrow steel plate.

9. The creep measuring apparatus for concrete test blocks according to claim 1, characterized in that: The bottom of the pressure applying hanging basket (6) is made of a thin steel plate, and the surrounding of the pressure applying hanging basket (6) is made of a steel wire mesh.

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