Concrete shrinkage test device

Abstract

The utility model discloses a concrete shrinkage test device, which relates to the field of concrete shrinkage tests and comprises a base, two movable seats are slidably mounted at the top end of the base, a clamping plate is fixed at the end of one movable seat, and a detection instrument is mounted at the end of the other movable seat. And a concave box body in contact with the top end of the base and a limiting mechanism arranged on the concave box body are arranged on the other side of the movable seat. According to the utility model, through the arrangement of the limiting unit, after the detection of a test piece is completed, the push force for the end parts of the two transmission rods to be far away from each other is given by applying the pressing force to the pressing block, and the stressed movable rod synchronously drives the two push blocks and the limiting block to axially move, so that the limiting block is moved out from the limiting grooves in the two sides of the protective plate; the protective plates on the two sides of the concave box body can be conveniently and rapidly separated, so that the test piece in the concave box body is exposed, the test piece after detection can be conveniently and rapidly taken out, and the working efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete shrinkage testing, specifically a concrete shrinkage testing device. Background Technology

[0002] When concrete encounters changes in the natural environment, it will expand and shrink. Both expansion and shrinkage of concrete can cause cracks in the wall, affecting the indicators for evaluating the durability of concrete.

[0003] After concrete production is completed, existing concrete shrinkage expansion testers are used to test the shrinkage expansion rate of the concrete to determine whether the concrete is qualified. When using existing testing equipment, the concrete specimen needs to be placed in a concave box, the clamps at both ends are aligned with the two ends of the concrete, the connecting blocks at the ends of the clamps are in contact with the detection end of the testing instrument, the reading of the testing instrument is zeroed, and the shrinkage expansion rate of the concrete is determined by observing the reading of the testing instrument after one end has been left to stand for a period of time. After the test, the concrete specimen needs to be manually removed from the concave box, which requires flipping the concave box to remove it, which is quite cumbersome. Based on this, this utility model proposes a concrete shrinkage testing device. Utility Model Content

[0004] The purpose of this invention is to provide a concrete shrinkage testing device in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a concrete shrinkage testing device, comprising a base, two movable seats slidably mounted on the top of the base, a clamping plate fixed to the end of one movable seat, a testing instrument mounted on the end of the other movable seat, a concave box body contacting the clamping plate provided on the top of the base, and a limiting mechanism provided on the concave box body.

[0006] The limiting mechanism includes a limiting unit and a transmission unit;

[0007] The transmission unit is used to provide power for the movement of the limiting unit;

[0008] The limiting unit is used to provide a limit for the connection between the concave box and the protective plate.

[0009] As a further embodiment of this utility model: the limiting unit includes a push block, a limiting block, a positioning rod, a spring, and a guard plate;

[0010] The protective plates are slidably installed on both sides of the concave box body, and the protective plates are used to position the specimen inside the concave box body;

[0011] The push block is axially slidably mounted on the inner wall of the guard plate and extends to the outside of the guard plate. The push block is used to synchronously drive the limit block to move.

[0012] The limiting block is fixed to the end of the push block and extends to the inner side of the end of the concave box. The limiting block is used to provide a limit for the connection between the concave box and the protective plate.

[0013] The positioning rod is fixed to the inner wall of the guard plate and passes through the push block. The positioning rod is used to guide the axial movement of the push block.

[0014] The two ends of the spring are respectively engaged with the inner wall of the guard plate and the outer wall of the positioning rod, and the spring is used to provide a directional compressive force to the positioning rod at all times.

[0015] As a further embodiment of this utility model: the transmission unit includes a transmission rod and a pressing block;

[0016] The transmission rod is fixed to the end of the push block, and the transmission rod is used to receive the squeezing force from the pressing block to drive the push block to move axially.

[0017] The pressing block is laterally slidably mounted on the inner wall of the guard plate and extends to the outside of the guard plate. The pressing block is used to apply a pressing force to the transmission rod.

[0018] As a further improvement of this utility model, the number of transmission rods is provided in multiples, and the multiple transmission rods are symmetrically distributed on the outer side of the guard plate.

[0019] As a further embodiment of this utility model: the outer walls of the two ends of the transmission rod near the pressing block are inclined, the inner wall of the guard plate is formed with a sliding groove for the pressing block to move laterally, and the outer wall of the pressing block near the transmission rod is also inclined.

[0020] As a further embodiment of this utility model: the outer wall of the guard plate is formed with a sliding groove that moves axially with the push block, and the outer wall of the push block is generally U-shaped.

[0021] As a further embodiment of this utility model: the outer walls at both ends of the concave box are formed with slots for the limiting blocks to enter, and the ends of the limiting blocks are inclined.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By setting a limiting unit, after the test piece is tested, the pressing block applies pressure, which pushes the ends of the two transmission rods away from each other. The moving rod under force synchronously drives the two push blocks and the limiting block to move axially, so that the limiting block moves out of the limiting grooves on both sides of the guard plate. This facilitates the quick separation of the guard plates on both sides of the concave box, thereby exposing the test piece inside the concave box. This makes it easier to quickly remove the tested test piece, further improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the internal structure of the concave box of this utility model;

[0026] Figure 3 This is a schematic diagram of the installation structure of the positioning rod of this utility model.

[0027] In the diagram: 1. Base; 2. Movable seat; 3. Clamping plate; 4. Detection instrument; 5. Concave box; 6. Limiting mechanism; 601. Push block; 602. Limiting block; 603. Positioning rod; 604. Spring; 605. Transmission rod; 606. Pressing block; 607. Protective plate; 7. Adjusting screw. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-3 In this embodiment of the present invention, a concrete shrinkage testing device includes a base 1, two movable seats 2 are slidably installed on the top of the base 1, a clamping plate 3 is fixed to the end of one movable seat 2, and a testing instrument 4 is installed at the end of the other movable seat 2. A concave box 5 is provided at the top of the base 1 to contact the clamping plate 3. An adjusting screw 7 is provided at the end of the base 1 away from the concave box 5. The adjusting screw 7 passes through the base and is threadedly connected to the bottom of the movable seat 2 that contacts the testing instrument 4. A limiting mechanism 6 is provided on the concave box 5.

[0030] The limiting mechanism 6 includes a limiting unit and a transmission unit;

[0031] The transmission unit is used to provide power for the movement of the limit unit;

[0032] The limiting unit is used to limit the connection between the concave box 5 and the protective plate 607;

[0033] The limiting unit includes a push block 601, a limiting block 602, a positioning rod 603, a spring 604, and a guard plate 607;

[0034] The protective plate 607 is slidably installed on both sides of the concave box 5. The protective plate 607 is used to position the specimen inside the concave box 5.

[0035] The push block 601 is axially slidably installed on the inner wall of the guard plate 607 and extends to the outside of the guard plate 607. The push block 601 is used to synchronously drive the limit block 602 to move.

[0036] The limiting block 602 is fixed to the end of the push block 601 and extends to the inner side of the end of the concave box 5. The limiting block 602 is used to limit the connection between the concave box 5 and the guard plate 607.

[0037] The positioning rod 603 is fixed to the inner wall of the guard plate 607 and passes through the push block 601. The positioning rod 603 is used to provide guidance for the axial movement of the push block 601.

[0038] The two ends of the spring 604 are respectively engaged with the inner wall of the guard plate 607 and the outer wall of the positioning rod 603. The spring 604 is used to provide a directional squeezing force to the positioning rod 603 at all times.

[0039] The transmission unit includes a transmission rod 605 and a pressing block 606;

[0040] The transmission rod 605 is fixed to the end of the push block 601. The transmission rod 605 is used to receive the squeezing force from the pressing block 606 to drive the push block 601 to move axially.

[0041] The pressing block 606 is laterally slidably mounted on the inner wall of the guard plate 607 and extends to the outside of the guard plate 607. The pressing block 606 is used to apply a pressing force to the transmission rod 605.

[0042] In this embodiment, it should be noted that: the top of the base 1 is provided with a "convex" shaped groove for the movable seat 2 to slide horizontally, and the bottom of the movable seat 2 is formed with a "convex" shaped slider that matches the "convex" shaped groove. The "convex" shaped slider at the bottom of the movable seat 2, which is in contact with the detection instrument 4, is threadedly connected to the adjusting screw 7.

[0043] When the specimen needs to be tested, the specimen is placed inside the concave box 5. The movable seat 2 corresponding to the clamp 3 is moved so that the clamp 3 fixed on the movable seat 2 contacts the two sides of the specimen. Then, the movable seat 2 corresponding to the testing instrument 4 is moved by rotating the adjusting screw 7 so that the probe part of the testing instrument 4 contacts the end shaft of the clamp 3 that passes through the movable seat 2. When the specimen shrinks and expands, the end of the clamp 3 is pushed to move. The shrinkage and expansion rate of the specimen is judged by the reading of the testing instrument 4.

[0044] When it is necessary to remove the tested specimen, pressure can be applied to the pressing block 606, causing it to move laterally along the inside of the guard plate 607. The laterally moving pressing block 606 will contact both ends of the transmission rod 605, giving the transmission rod 605 a squeezing force that pushes it away from each other. The force-bearing transmission rod 605 will simultaneously drive the push block 601 to move axially, causing the push block 601 to move along the outer wall of the positioning rod 603 and apply squeezing force to the spring 604. The moving push block 601 simultaneously drives the limiting block 602 to move, causing the limiting block 602 to move out of the limiting grooves at both ends of the concave box 5. The limiting block 602 at the other end of the concave box 5 moves out simultaneously, thereby releasing the connection and limiting between the concave box 5 and the guard plate 607, making it easier to remove the specimen inside the concave box 5, and further improving work efficiency.

[0045] Please refer to this carefully. Figures 1-3 Multiple transmission rods 605 are provided, and the multiple transmission rods 605 are symmetrically distributed on the outside of the guard plate 607. The outer walls of the two ends of the transmission rods 605 near the pressing block 606 are inclined. The inner wall of the guard plate 607 is formed with a sliding groove for the pressing block 606 to move laterally. The outer wall of the pressing block 606 near the transmission rod 605 is also inclined. The outer wall of the guard plate 607 is formed with a sliding groove for the push block 601 to move axially. The outer wall of the push block 601 is generally U-shaped. The outer walls of the two ends of the concave box 5 are formed with holes and slots for the limiting block 602 to enter. The ends of the limiting block 602 are inclined.

[0046] In this embodiment: With this structure, when the push block 601 and the transmission rod 605 are subjected to the squeezing force from the pressing block 606 and move axially, the two symmetrically distributed push blocks 601 and transmission rod 605 move away from each other synchronously, thereby synchronously releasing the connection limit of the two limiting blocks 602 on the concave box 5 and the guard plate 607.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A concrete shrinkage test device, comprising a base (1), the top end of the base (1) is slidingly installed with two movable seats (2), the end of one movable seat (2) is fixed with a clamping plate (3), the end of the other movable seat (2) is installed with a detection instrument (4), and the top end of the base (1) is provided with a concave box body (5) in contact with the clamping plate (3), characterized in that, The limiting mechanism (6) is arranged on the concave box body (5); The limiting mechanism (6) comprises a limiting unit and a transmission unit; The transmission unit is used for providing power for the movement of the limiting unit; The limiting unit is used for limiting the connection between the concave box body (5) and the guard plate (607).

2. The concrete shrinkage testing device of claim 1, wherein The limiting unit comprises a push block (601), a limiting block (602), a positioning rod (603), a spring (604) and a guard plate (607); The guard plate (607) is laterally slidably arranged on the two sides of the concave box body (5), and is used for positioning the test piece in the concave box body (5); The push block (601) is axially slidably arranged on the inner wall of the guard plate (607) and extends to the outside of the guard plate (607), and is used for synchronously driving the limiting block (602) to move; The limiting block (602) is fixed on the end of the push block (601) and extends to the inside of the end of the concave box body (5), and is used for limiting the connection between the concave box body (5) and the guard plate (607); The positioning rod (603) is fixed on the inner wall of the guard plate (607) and penetrates the push block (601), and is used for guiding the axial movement of the push block (601); The two ends of the spring (604) are clamped on the inner wall of the guard plate (607) and the outer wall of the positioning rod (603) respectively, and the spring (604) is used for always providing a directional extrusion thrust force for the positioning rod (603).

3. A concrete shrinkage testing device according to claim 2, wherein The transmission unit comprises a transmission rod (605) and a pressing block (606); The transmission rod (605) is fixed on the end of the push block (601), and is used for receiving the extrusion thrust force from the pressing block (606) to drive the push block (601) to move axially; The pressing block (606) is laterally slidably arranged on the inner wall of the guard plate (607) and extends to the outside of the guard plate (607), and is used for giving the transmission rod (605) an extrusion thrust force.

4. A concrete shrinkage test device according to claim 3, wherein The number of the transmission rods (605) is multiple, and the multiple transmission rods (605) are symmetrically distributed on the outside of the guard plate (607).

5. The concrete shrinkage testing device of claim 3, wherein The two end outer walls of the transmission rod (605) close to the pressing block (606) are in an inclined state, the inner wall of the guard plate (607) is formed with a sliding groove for the lateral movement of the pressing block (606), and the outer wall of the pressing block (606) close to the transmission rod (605) is also in an inclined state.

6. The concrete shrinkage testing device of claim 2, wherein The outer wall of the guard plate (607) is formed with a sliding groove for the axial movement of the push block (601), and the outer wall of the push block (601) is in a whole "U" shape structure.

7. The concrete shrinkage testing device of claim 2, wherein The outer walls of the two ends of the concave box body (5) are formed with holes for the limiting block (602) to enter, and the end of the limiting block (602) is in an inclined state.

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