CN118914527A - Improved concrete shrinkage test detection equipment - Google Patents

Abstract

The invention discloses improved concrete shrinkage test detection equipment, which comprises control equipment, wherein the control equipment comprises a control unit; the fixed platform is provided with a mounting opening and a sliding groove; the mobile platform is arranged in the mounting port; the first dial indicator adjusting mechanism is arranged above the fixed platform; the first dial indicator is arranged on the first dial indicator adjusting mechanism; the second dial indicator adjusting mechanism is used for adjusting the first dial indicator and comprises a first moving device, a second moving device and a third moving device; a second dial gauge; and the test block fixing mechanism is arranged on the mobile platform. The invention is stable and reliable, solves the problem that the shrinkage in one direction and other shrinkage test devices can only be detected to influence the test on the shape and size suitability of the concrete test block, provides the function of testing the shrinkage test of the concrete test block in the other direction, and improves the test block inclusion of the concrete shrinkage test device.

Description

An improved concrete shrinkage test equipment

Technical Field

The invention relates to a detection device, in particular to an improved concrete shrinkage test detection device, belonging to the technical field of concrete performance detection.

Background Art

Concrete shrinkage refers to the phenomenon of volume reduction that occurs in the initial stage of concrete setting or during the hardening process. Concrete will shrink in dry conditions and expand in humid conditions (or in water). Once cracks appear in concrete, the steel bars inside will be exposed, which will easily corrode and affect the construction quality of the entire building project. At the same time, the existence of cracks cuts off the overall continuity of the concrete structure and will damage the overall strength of the concrete structure. Therefore, it is necessary to test the shrinkage performance of concrete before construction.

With the development of science and technology, the testing equipment for concrete shrinkage has become more and more perfect. However, most of the concrete shrinkage detection equipment on the market still has shortcomings such as limited applicable concrete size, only being able to detect shrinkage in one direction and large equipment errors.

After searching, the Chinese utility model patent with the announcement number CN211292911U currently discloses a concrete shrinkage and expansion instrument, but it has the following shortcomings: 1. It is impossible to adjust the position of the baffle according to the cross-sectional size of the concrete test block. As a result, when measuring the shrinkage and expansion of concrete, the measured data is not the shrinkage and expansion value of the center of the cross-sectional area of the concrete test block, which will cause errors in the test results; 2. It can only test the shrinkage and expansion values along the longitudinal direction, and cannot test the shrinkage and expansion values in the other two directions. The longitudinal shrinkage and expansion test results lack certain reference data.

The Chinese utility model patent with announcement number CN213875689U discloses a concrete shrinkage test device, but has the following shortcomings: 1. The micrometer is flexible only in one direction. Therefore, the adaptability of the device to concrete test blocks of different sizes is low. For test blocks with larger cross-sections, the micrometer cannot measure the center position data of the cross-section, which has a certain impact on the test results; 2. Only the shrinkage value along one direction can be tested, and the test data lacks certain reference.

The Chinese utility model patent with announcement number CN220552385U discloses a concrete shrinkage test device, but the top micrometer cannot move in the longitudinal and transverse directions, but can only move vertically. When the longitudinal lengths of the test blocks are different, the top micrometer cannot measure the value of the top center of the test block, resulting in non-standard test results; at the same time, the micrometer that can move on the fixed plate can only test the test blocks with quantitative cross-sectional dimensions, and the device has low applicability to test test blocks.

Therefore, the key to solving the above technical problems is to develop an improved concrete shrinkage test equipment that is convenient for testing.

Summary of the invention

In view of the many defects and shortcomings existing in the above-mentioned background technology, the present invention has made improvements and innovations thereto, with the aim of providing a stable and reliable improved concrete shrinkage test detection equipment, which solves the problems that the detection equipment has low adaptability to the concrete size and can only detect the shrinkage in one direction, which affects the test. At the same time, it also provides the function of testing the shrinkage of the concrete test block in another direction, so that the test results are comparable and provide a reference for the experimental results.

Another object of the present invention is to improve the adaptability of the testing device to concrete of different sizes.

In order to solve the above problems and achieve the above invention objectives, an improved concrete shrinkage test detection device of the present invention is realized by adopting the following design structure and the following technical solutions:

An improved concrete shrinkage test detection device comprises a control device and also comprises: a fixed platform (1), one side of the fixed platform (1) is provided with an installation opening inwardly, and two ends of the fixed platform (1) are also symmetrically provided with sliding grooves (11);

A mobile platform (2), the mobile platform (2) is slidably mounted in a mounting opening of the fixed platform (1);

A first micrometer adjustment mechanism (3), the first micrometer adjustment mechanism (3) being arranged above the middle portion of the other side of the fixed platform (1);

A first micrometer (4), the first micrometer (4) being mounted on the first micrometer adjustment mechanism (3);

A second micrometer (5), the second micrometer (5) being mounted on the second micrometer adjustment mechanism;

A test block fixing mechanism (6), wherein the test block fixing mechanism (6) is arranged on the mobile platform (2);

A second dial gauge adjustment mechanism, the second dial gauge adjustment mechanism comprising: a first moving device (7), the first moving device (7) being slidably mounted in a slide groove (11);

A second moving device (8), the second moving device (8) is connected above the first moving device (7);

A third moving device (9), the third moving device (9) is connected above the second moving device (8);

The test block fixing mechanism (6) is used to fix the concrete test block (10).

Preferably, the fixed platform (1) is in the form of a rectangular parallelepiped structure as a whole, and fixed supports (12) are provided at the four corners below the fixed platform (1); the slide groove (11) is located at the end of the fixed platform (1) on the side of the mounting opening of the fixed platform (1), wherein grooves are provided on the inner walls at both ends of the mounting opening of the fixed platform (1); the slide groove (11) is in the form of a T-shaped groove as a whole.

Preferably, bosses are provided at both ends of the mobile platform (2) and are adapted to the grooves of the fixed platform (1), movable brackets (21) are provided at the four corners of the mobile platform (2), and a push-pull handle (22) is provided on one side of the mobile platform (2), wherein a support platform (23) is symmetrically provided on the upper surface of the mobile platform (2).

Preferably, the first dial gauge adjustment mechanism (3) comprises:

A first adjustment bracket (31), wherein a first sliding groove (311) is provided on the first adjustment bracket (31);

A first screw rod (32), the first screw rod (32) is rotatably connected in the first slide groove (311);

A first motor (33), the first motor (33) is located below the fixed platform (1), and a rotating shaft of the first motor (33) passes through the fixed platform (1) and is connected to the first screw rod (32);

A first movable nut (34), the first movable nut (34) being threadedly connected to the first screw rod (32);

A hanger (35), one end of which is connected to the first movable nut (34);

A movable fixing device (36), the movable fixing device (36) is slidably connected to the other end of the hanger (35);

The first motor (33) is connected to the control device.

Preferably, the hanger (35) is in the shape of a Chinese character "中" as a whole, and a slideway is provided through the other end of the hanger (35) along the length direction, and the movable fixing device (36) can be detachably mounted on the slideway;

The movable fixing device (36) comprises an upper connecting body and a lower connecting body and a plurality of fasteners connecting the upper connecting body and the lower connecting body together, and the first micrometer (4) is mounted on the movable fixing device (36).

Preferably, the first moving device (7) comprises:

A slide bar (71), the slide bar (71) is slidably connected in the transverse groove of the slide groove (11);

A handle (72), the handle (72) is connected to one end of the slide bar (71), and the handle (72) is located outside the fixed platform (1);

The slider (73) is connected to the other end of the slide bar (71), and the slider (73) is slidably connected in the longitudinal groove of the slide groove (11).

Preferably, the second moving device (8) comprises:

A second movable frame (81), wherein a second sliding groove (811) is provided on the second movable frame (81);

A second screw rod (82), the second screw rod (82) is rotatably connected in the second slide groove (811);

A second motor (83), the second motor (83) is arranged on the outside of the second movable frame (81), and the rotation shaft of the second motor (83) passes through the outer plate of the second movable frame (81) and is connected to the second screw rod (82);

A second movable nut (84) is threadedly connected to the second screw rod (82), wherein the lower end of the second movable frame (81) is connected to the upper end of the slider (73), and the second motor (83) is connected to the control device.

Preferably, the third moving device (9) comprises:

A third movable frame (91), wherein a third sliding groove (911) is provided on the third movable frame (91);

A third screw rod (92), the third screw rod (92) is rotatably connected to the third sliding groove (911);

A third motor (93), the third motor (93) is arranged above the third moving frame (91), and the rotating shaft of the third motor (93) passes through the top plate of the third moving frame (91) and is connected to the third screw rod (92);

A third movable nut (94), the third movable nut (94) being threadedly connected to the third screw rod (92);

A suspension arm (95), one end of the suspension arm (95) is connected to the third movable nut (94), and the other end of the suspension arm (95) is installed with a second micrometer (5);

The lower end of the third movable frame (91) is connected to the upper end of the second movable nut (84), and the third motor (93) is connected to the control device.

Preferably, the test block fixing mechanism (6) comprises:

A detachable baffle (61), which is detachably mounted above two supports (23) of the movable platform (2) near the push-pull handle (22);

A variable baffle device is arranged in the middle of the upper part of two supporting platforms (23) of the movable platform (2) near the first micrometer adjustment mechanism (3).

Wherein, the height of the variable baffle device is lower than the height of the first adjustment bracket (31).

Preferably, the variable position baffle device comprises:

A fixed frame (62), the lower end of which is connected to the movable platform (2), and a movable slot is provided on the fixed frame (62);

A screw rod (63), the screw rod (63) is rotatably connected in the movable groove;

A rotating nut (64) is threadedly connected to the screw rod (63);

A telescopic rod, one end of which is connected to a rotating nut (64);

A variable baffle plate (68), the variable baffle plate (68) is connected to the other end of the telescopic rod;

A fourth motor (69), the motor (69) is connected below the mobile platform (2), and a rotating shaft of the fourth motor (69) passes through the mobile platform (2) and is connected to the screw rod (63);

The telescopic rod comprises: a sleeve (65), one end of which is connected to a rotating nut (64);

A spring (66), wherein the spring (66) is sleeved in the sleeve (65);

A connecting rod (67), one end of the connecting rod (67) is in contact with and connected to the spring (66);

The fourth motor (69) is connected to the control device.

The working principle is: before using the improved concrete shrinkage test detection equipment of the above-mentioned design structure, the improved concrete shrinkage test detection equipment of the above-mentioned design structure that has been manufactured needs to be installed as a backup.

The specific steps are:

Step 1: The operator pulls out the mobile platform (2) by pushing and pulling the handle (22), removes the removable baffle (61), and first places the concrete test block (10) in the center of the support platform (23) without contacting the variable baffle (68). Then, the operator adjusts the position of the variable baffle (68) according to the size of the surface of the concrete test block (10) corresponding to the variable baffle (68) to drive the screw rod (63) to work through the fourth motor (69), and the rotating nut (64) starts to move vertically under the drive of the screw rod (63), and the rotating nut (64) starts to move vertically under the drive of the screw rod (63). The movement of the telescopic rod (64) drives the telescopic rod to move vertically to adjust the position of the variable baffle (68), and the variable baffle (68) is adjusted to the center of the corresponding surface of the concrete test block (10). Then, the operator steadily pushes the concrete test block (10) toward the detachable baffle (61) until the other side of the concrete test block (10) reaches a position where the detachable baffle (61) can be inserted into the card slot, and then fixes the detachable baffle (61). Then, the operator adjusts the small distance between the concrete test block (10) and the detachable baffle (61);

Step 2: After the concrete test block (10) is fixed, the operator pushes the push-pull handle (22) to completely push the mobile platform (2) into the fixed platform (1), so that the concrete test block (10) is better fixed between the removable baffle (61) and the variable baffle (68); then the operator drives the second micrometer (5) on the second micrometer adjustment mechanism to move horizontally according to the size of the concrete test block (10) by holding the handles (72) on both sides of the fixed platform (1), and waits until the second micrometer (5) is located in the horizontal middle of the concrete test block (10);

Subsequently, the operator controls the third motor (93) through the control device, and after the third motor (93) is started, it drives the third screw rod (92) to rotate, thereby driving the third movable nut (94) threadedly connected to the third screw rod (92) to move, thereby driving the suspension arm (95) connected to the third movable nut (94) to drive the second micrometer (5) to move vertically until the needle of the second micrometer (5) is located at the middle position of the vertical thickness of the concrete test block (10);

Next, the operator controls the second motor (83) through the control device. After the second motor (83) is started, it drives the second screw rod (82) to rotate, thereby driving the second moving nut (84) threadedly connected to the second screw rod (82) to move, thereby driving the third moving device (9) and the second micrometer (5) on the third moving device (9) to move toward the concrete test block (10), until the probe of the second micrometer (5) completely contacts the concrete test block (10), and then the second motor (83) is turned off;

Finally, until the probes of the second micrometers (5) at both ends of the fixed platform (1) are completely in contact with the concrete test block (10); the second micrometers (5) at both ends are operated according to the above basic steps, but these are not the only operating steps;

Step 3, the operator drives the first micrometer (4) connected to the movable fixing device (36) to move along the slideway of the hanger (35) until the first micrometer (4) is located at the center of the upper surface of the concrete test block (10), and then tightens the four fasteners on the movable fixing device (36);

Then, the operator turns on the first motor (33) below the fixed platform (1) through the control device. After the first motor (33) is started, it drives the first screw rod (32) to rotate, thereby driving the first movable nut (34) threadedly connected to the first screw rod (32) to move, thereby driving the hanger (35) connected to the first movable nut (34) to move, and then the hanger (35) drives the movable fixing device (36) connected thereto to drive the first micrometer (4) to move toward the concrete test block (10). Finally, until the probe of the first micrometer (4) completely contacts the upper surface of the concrete test block (10), the first motor (33) stops working.

Compared with the prior art, the present invention has the following beneficial effects:

1. The second micrometer adjustment mechanism of the present invention can drive the second micrometer to freely move within a certain range in the horizontal, longitudinal and vertical directions, thereby improving the adaptability of the test device to concrete of different sizes;

2. While the present invention can detect the unidirectional shrinkage of concrete test blocks, it also provides the ability to test the shrinkage of concrete test blocks in another direction, so that the test results are comparable and provide a reference for the experimental results;

3. The test block fixing mechanism of the present invention provides a certain elasticity for the variable baffle plate, and can flexibly adjust the height according to the size of the concrete test block. The position of the concrete test block is fixed with the detachable baffle plate, which is particularly helpful for the stability of the cylindrical test block.

4. The present invention provides a mobile platform that can be pushed and pulled, making it more convenient to place the concrete test block. At the same time, two thin strip-shaped bearing platforms are added to the mobile platform, which to a certain extent reduces the impact of the friction between the concrete test block and the mobile platform on the shrinkage of the concrete test block;

5. The variable baffle device of the present invention can make the variable baffle move vertically along the screw rod, and the telescopic rod can change its position longitudinally under the action of the built-in spring to adapt to the size of the concrete test block;

6. The hanger of the present invention is cleverly designed and adopts a "Z"-shaped structure, which enables the first micrometer to be more flexible when changing its height according to the size of the concrete specimen, eliminating the influence of the height problem of the variable baffle device on the up and down movement of the first micrometer;

7. The present invention fixes the adjusted first micrometer on a mobile fixing device, which can prevent the instrument from deviating during the test and ensure the accuracy of the test results.

8. The upper surface of the mobile platform of the present invention is provided with a test block fixing mechanism, which can make the installation of the concrete test block more convenient and make the device more adaptable to the test block size.

BRIEF DESCRIPTION OF THE DRAWINGS

The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is one of the use state diagrams of the present invention;

Fig. 2 is a second usage state diagram of the present invention;

Fig. 3 is a third diagram of the use state of the present invention;

Fig. 4 is a fourth diagram of the use state of the present invention;

Fig. 5 is a fifth diagram of the use state of the present invention;

FIG6 is a sixth diagram of the use state of the present invention;

Fig. 7 is a seventh diagram of the use state of the present invention;

FIG8 is an eighth diagram of the use state of the present invention;

FIG9 is a schematic diagram of the overall structure of the present invention;

FIG10 is a second schematic diagram of the overall structure of the present invention;

FIG11 is a schematic plan view of one of the present invention;

FIG12 is a second schematic plan view of the present invention;

FIG13 is a schematic diagram of the partial structure of the test block fixing mechanism (6) of the present invention;

Among them, the numbers in the figure are: 1-fixed platform, 11-slideway, 12-fixed support;

2—mobile platform, 21—movable bracket, 22—push-pull handle, 23—support platform;

3—first micrometer adjustment mechanism, 31—first adjustment bracket, 311—first slide slot, 32—first screw rod, 33—first motor, 34—first moving nut, 35—hanging bracket, 36—movable fixing device;

4—1st micrometer;

5—second micrometer;

6—test block fixing mechanism, 61—detachable baffle, 62—fixing frame, 63—screw, 64—rotating nut, 65—sleeve, 66—spring, 67—connecting rod, 68—variable baffle, 69—fourth motor;

7—first moving device, 71—sliding rod, 72—handle, 73—sliding block;

8—second moving device, 81—second moving frame, 811—second slide slot, 82—second screw rod, 83—second motor, 84—second moving nut;

9—third moving device, 91—third moving frame, 911—third slide slot, 92—third screw rod, 93—third motor, 94—third moving nut, 95—hanging arm;

10—Concrete test block.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figures 1 to 13 of the specification, an improved concrete shrinkage test detection device includes a control device and a fixed platform 1, a mounting opening is opened inwardly on one side of the fixed platform 1, and sliding grooves 11 are symmetrically opened at both ends of the fixed platform 1;

The mobile platform 2 is slidably mounted in the mounting opening of the fixed platform 1;

A first micrometer adjustment mechanism 3, the first micrometer adjustment mechanism 3 is arranged above the middle part of the other side of the fixed platform 1;

A first micrometer 4, the first micrometer 4 is installed on the first micrometer adjustment mechanism 3;

A second micrometer 5, the second micrometer 5 is installed on the second micrometer adjustment mechanism;

A test block fixing mechanism 6, the test block fixing mechanism 6 is arranged on the mobile platform 2;

The second micrometer adjustment mechanism comprises: a first moving device 7, the first moving device 7 is slidably mounted in the slide groove 11;

A second moving device 8, the second moving device 8 is connected above the first moving device 7;

A third moving device 9, the third moving device 9 is connected above the second moving device 8;

The test block fixing mechanism 6 is used to fix the concrete test block 10 .

Furthermore, as shown in FIG9 , the fixed platform 1 is an overall rectangular parallelepiped structure, and fixed supports 12 are provided at the four corners below the fixed platform 1 . The slide groove 11 is located at the end of the fixed platform 1 on the mounting port side of the fixed platform 1 , wherein grooves are provided on the inner walls at both ends of the mounting port of the fixed platform 1 ; the slide groove 11 is an overall T-shaped groove.

In the present invention, the transverse groove of the slide groove 11 is opened through the outer side of the fixed platform 1, and the longitudinal groove of the slide groove 11 is opened through the top surface of the fixed platform 1. The transverse groove and the longitudinal groove are connected; the slide groove 11 is used for the first moving device 7 to move horizontally.

Furthermore, as shown in Figures 2, 7 and 9, bosses that match the grooves of the fixed platform 1 are provided at both ends of the mobile platform 2, movable brackets 21 are provided at the four corners below the mobile platform 2, and a push-pull handle 22 is provided on one side of the mobile platform 2, wherein a supporting platform 23 is symmetrically provided on the upper surface of the mobile platform 2.

In the present invention, four movable brackets 21 are installed at the lower end of the mobile platform 2, and the mobile platform 2 can be pulled outward by the movable brackets 21 and the bosses, which provides convenience for placing the concrete test block 10; the support 23 is a strip-shaped rectangular support, and a card slot adapted to the removable baffle 61 is also opened on the two support platforms 23.

Further, as shown in FIG2 , the first dial gauge adjustment mechanism 3 includes:

A first adjustment bracket 31, wherein a first sliding groove 311 is formed on the first adjustment bracket 31;

A first screw rod 32, the first screw rod 32 is rotatably connected in the first slide groove 311;

A first motor 33, the first motor 33 is located below the fixed platform 1, and a rotating shaft of the first motor 33 passes through the fixed platform 1 and is connected to the first screw rod 32;

A first movable nut 34 , the first movable nut 34 being threadedly connected to the first screw rod 32 ;

A hanger 35, one end of which is connected to the first movable nut 34;

A movable fixing device 36, the movable fixing device 36 is slidably connected to the other end of the hanger 35;

The first motor 33 is connected to the control device.

Specifically, the hanger 35 is in the shape of a Chinese character "中" as a whole, and a slideway is provided through the other end of the hanger 35 along the length direction, and the movable fixing device 36 can be detachably installed on the slideway;

The movable fixing device 36 includes an upper connecting body and a lower connecting body and a plurality of fasteners connecting the upper connecting body and the lower connecting body together, and the first micrometer 4 is installed on the movable fixing device 36 .

In the present invention, one end of the first micrometer 4 is arranged through the middle of the upper connecting body and the lower connecting body; the rectangular hollow part of the hanger 28 is located directly above the fixing frame 62;

The movable fixing device 36 is composed of a cube formed by two rectangular bodies, and is divided into an upper and lower shell body, and the upper and lower shell bodies are connected by four fastener screws.

Further, as shown in FIG11 , the first moving device 7 includes:

A slide bar 71, the slide bar 71 is slidably connected in the transverse groove of the slide groove 11;

A handle 72, the handle 72 is connected to one end of the slide bar 71, and the handle 72 is located outside the fixed platform 1;

The slider 73 is connected to the other end of the slide rod 71 , and the slider 73 is slidably connected in the longitudinal groove of the slide groove 11 .

In the present invention, the first moving device 7 is used to provide lateral movement for the second moving device 8; the upper surface of the slider 73 is slightly higher than the upper surface of the slide groove 11, so that the slider 73 drives the upper second moving device 8 to move laterally along the slide groove 11 more smoothly.

Further, as shown in FIG11 , the second moving device 8 includes:

A second movable frame 81, wherein a second sliding groove 811 is formed on the second movable frame 81;

A second screw rod 82, the second screw rod 82 is rotatably connected in the second slide groove 811;

A second motor 83, which is disposed on the outside of the second moving frame 81, and a rotating shaft of the second motor 83 passes through an outer plate of the second moving frame 81 and is connected to the second screw rod 82;

The second movable nut 84 is threadedly connected to the second screw rod 82, wherein the lower end of the second movable frame 81 is connected to the upper end of the slider 73, and the second motor 83 is connected to the control device.

In the present invention, the second moving device 8 is used to provide longitudinal movement for the third moving device 9; the rotating shaft of the second motor 83 is connected to the second screw rod 82 through a threaded hole; the upper surface of the second moving nut 84 is slightly higher than the upper surface of the second slide groove 811, so that the second moving nut 84 drives the third moving device 9 above to move longitudinally along the second slide groove 811 more smoothly.

Further, as shown in FIG11 , the third moving device 9 includes:

A third moving frame 91, on which a third sliding groove 911 is provided;

A third screw rod 92, the third screw rod 92 is rotatably connected to the third sliding groove 911;

A third motor 93, which is disposed above the third moving frame 91, and a rotating shaft of the third motor 93 passes through a top plate of the third moving frame 91 and is connected to the third screw rod 92;

A third movable nut 94, the third movable nut 94 is threadedly connected to the third screw rod 92;

A suspension arm 95, one end of the suspension arm 95 is connected to the third movable nut 94, and the other end of the suspension arm 95 is installed with a second micrometer 5;

The lower end of the third moving frame 91 is connected to the upper end of the second moving nut 84, and the third motor 93 is connected to the control device.

In the present invention, the third moving device 9 is used to provide up and down movement for the second micrometer 5; the rotating shaft of the third motor 93 is connected to the second screw rod 82 through a threaded hole; and a hole suitable for the size of the arm of the second micrometer 5 is opened at the hanging part of the arm 95.

Further, as shown in FIG. 12 and FIG. 13 , the test block fixing mechanism 6 includes:

A detachable baffle 61, which is detachably mounted above the two supports 23 of the mobile platform 2 near the push-pull handle 22;

The variable baffle device is arranged in the middle part above the two bearing platforms 23 of the mobile platform 2 near the first micrometer adjustment mechanism 3.

The height of the variable baffle device is lower than the height of the first adjustment bracket 31 .

In the present invention, the variable baffle device can make the variable baffle 68 vertically displace along the screw rod 63 , and the telescopic rod can change its position longitudinally under the action of the built-in spring to adapt to the size of the concrete test block 10 .

Specifically, as shown in FIG. 12 and FIG. 13 , the variable position baffle device includes:

A fixed frame 62, the lower end of which is connected to the mobile platform 2, and a moving slot is provided in the fixed frame 62;

A screw rod 63, the screw rod 63 is rotatably connected in the movable groove;

Rotate the nut 64, which is threadedly connected to the screw rod 63;

A telescopic rod, one end of which is connected to the rotating nut 64;

A variable baffle plate 68, the variable baffle plate 68 is connected to the other end of the telescopic rod;

A fourth motor 69, the motor 69 is connected below the mobile platform 2, and a rotating shaft of the fourth motor 69 passes through the mobile platform 2 and is connected to the screw rod 63;

The telescopic rod comprises: a sleeve 65, one end of which is connected to a rotating nut 64;

Spring 66, spring 66 is sleeved in sleeve 65;

A connecting rod 67, one end of which is in contact with and connected to the spring 66;

The fourth motor 69 is connected to the control device.

In summary, a more specific embodiment of the present invention is:

Before using the improved concrete shrinkage test detection device of the above-mentioned design structure, the already manufactured device needs to be installed as a backup.

The specific steps are:

Step 1: The operator pulls out the mobile platform 2 by pushing and pulling the handle 22, removes the removable baffle 61, and first places the concrete test block 10 in the center of the base 23 without contacting the variable baffle 68. Then, the operator adjusts the position of the variable baffle 68 according to the size of the surface of the concrete test block 10 corresponding to the variable baffle 68 through the fourth motor 69 to drive the screw rod 63 to work, and the rotating nut 64 starts to move vertically under the drive of the screw rod 63. The movement of the rotating nut 64 drives the telescopic rod to move vertically to adjust the position of the variable baffle 68, and adjusts the variable baffle 68 to the center of the corresponding surface of the concrete test block 10. Then, the operator steadily pushes the concrete test block 10 toward the removable baffle 61 until the other side of the concrete test block 10 reaches a point where the removable baffle 61 can be inserted into the slot, and then fixes the removable baffle 61. Then, the operator adjusts the small distance between the concrete test block 10 and the removable baffle 61.

Step 2: After the concrete test block 10 is fixed, the operator pushes the push-pull handle 22 to completely push the mobile platform 2 into the fixed platform 1, so that the concrete test block 10 is better fixed between the removable baffle 61 and the variable baffle 68; then the operator drives the second micrometer 5 on the second micrometer adjustment mechanism to move horizontally according to the size of the concrete test block 10 by holding the handles 72 on both sides of the fixed platform 1, and waits until the second micrometer 5 is located in the horizontal middle of the concrete test block 10;

Subsequently, the operator controls the third motor 93 through the control device. After the third motor 93 is started, it drives the third screw rod 92 to rotate, thereby driving the third movable nut 94 threadedly connected to the third screw rod 92 to move, thereby driving the arm 95 connected to the third movable nut 94 to drive the second micrometer 5 to move vertically until the needle of the second micrometer 5 is located at the middle position of the vertical thickness of the concrete test block 10;

Next, the operator controls the second motor 83 through the control device. After the second motor 83 is started, it drives the second screw rod 82 to rotate, thereby driving the second moving nut 84 threadedly connected to the second screw rod 82 to move, thereby driving the third moving device 9 and the second micrometer 5 on the third moving device 9 to move toward the concrete test block 10, and then the second motor 83 is turned off after the probe of the second micrometer 5 completely contacts the concrete test block 10;

Finally, until the probes of the second micrometers 5 at both ends of the fixed platform 1 are completely in contact with the concrete test block 10; the second micrometers 5 at both ends are operated according to the above basic steps, but this is not the only operation step;

Step 3, the operator drives the first micrometer 4 connected to the mobile fixing device 36 to move along the slideway of the hanger 35 until the first micrometer 4 is located at the center of the upper surface of the concrete test block 10, and then tightens the four fasteners on the mobile fixing device 36;

Then, the operator turns on the first motor 33 under the fixed platform 1 through the control device. After the first motor 33 is started, it drives the first screw rod 32 to rotate, and then drives the first movable nut 34 threadedly connected to the first screw rod 32 to move, thereby driving the hanger 35 connected to the first movable nut 34 to move, and then the hanger 35 drives the movable fixing device 36 connected thereto to drive the first micrometer 4 to move toward the concrete test block 10. Finally, the first motor 33 stops working until the probe of the first micrometer 4 completely contacts the upper surface of the concrete test block 10.

During the above-mentioned entire implementation process, the fixed platform 1 is the basic working platform of the entire device, and all mechanical equipment that realizes the function are located on this fixed platform 1;

The slide groove 11 is substantially T-shaped, and allows the slider 73 of the first moving device 7 to move left and right in the groove, so as to drive the second moving device 8 above the slider 73 to adjust the left and right position in order to adapt to the size of the concrete in one direction;

The fixed support 12 is used to support the fixed platform 1 to ensure the stability and safety of the entire device during the test.

The mobile platform 2 is a placement platform for the concrete test block 10 and the test block fixing mechanism 6, and is embedded in the fixed platform 1. It is pulled out and inserted into the fixed platform 1 through four movable brackets 21 and a push-pull handle 22 at the bottom. This design can avoid being affected by other devices on the fixed platform 1 when placing the test block;

The movable bracket 21 includes a fixed bracket and a pulley. A pulley is installed at the lower end of the fixed bracket to allow the upper movable platform 2 to be pulled out and inserted into the fixed platform 1.

The push-pull handle 22 is arranged on the outer side of the mobile platform 2, so as to facilitate the mobile platform 2 to be pulled out and inserted into the fixed platform 1 when placing the concrete test block 10;

The support 23 is a slender rectangular parallelepiped structure, fixed on the mobile platform 2, and used as a support for the concrete test block 10 to reduce the contact between the concrete test block 10 and the surface of the mobile platform 2 to avoid affecting the shrinkage of the concrete.

The first micrometer adjustment mechanism 3 is a device for adjusting the position of the first micrometer 4, which is located in the middle position of the rear side of the fixed platform 1. The first micrometer 4 is adjusted to the center of the upper surface of the concrete test block 10 according to the size of the upper surface of the test block, and then the first motor 33 is controlled to drive the first screw rod 32 and the first nut on the first screw rod 32 to move up and down to adjust the height of the hanger 35 until the needle tip of the first micrometer 4 contacts the upper surface of the concrete test block 10 and shrinks and clears the micrometer, and then the first motor 33 is turned off to achieve the function of controlling the position of the first micrometer 4 according to the size of the upper surface of the concrete. This design realizes the function of being able to adjust the position of the first micrometer 4 according to the size of the upper surface of the concrete, and can measure the shrinkage of the concrete test block 10 in one direction, thereby increasing the adaptability of the shrinkage test device to the overall size of the concrete test block 10 and improving the referenceability of the test results;

The first adjustment bracket 31 controls the movement of the first screw rod 32 and the first movable nut 34 on the first screw rod 32 through the first motor 33 to achieve control of the height position of the hanger 35 and the first micrometer 4. This design enables the first micrometer 4 to measure concrete test blocks 10 of various heights.

The first slide groove 311 is a working groove for the first screw rod 32 and the first movable nut 34. When the first motor 33 is started, the first screw rod 32 will rotate in the first slide groove 311, and at the same time drive the first movable nut 34 to move up and down in the slide groove 11, which not only provides a working groove for the first screw rod 32 and the first movable nut 34, but also is a protective structure for the test personnel;

The first screw rod 32 rotates under the control of the first motor 33 to drive the first movable nut 34 to move up and down;

The first motor 33 is connected to the first screw rod 32 through an opening at a position corresponding to the first micrometer adjustment mechanism 3 on the fixed platform 1 to control the rotation of the first screw rod 32;

The first movable nut 34 moves up and down under the rotation of the first screw rod 32, driving the hanger 35 fixed on the first movable nut 34 to move up and down to adjust the height position of the micrometer;

The hanger 35 is in the shape of a Chinese character "中", and the portion located above the test block fixing mechanism 6 is square and hollowed out. This design is to minimize the influence of the height of the test block fixing mechanism 6 on the first micrometer adjustment mechanism 3 when the hanger 35 and the micrometer are adjusted downward, and to a certain extent, the adaptability of the shrinkage test device to the height of the concrete test block 10 is improved;

The movable fixing device 36 is used to fix the first micrometer 4 , and the position of the movable fixing device 36 on the hanger 35 can be adjusted by loosening and tightening the fasteners, so as to better adjust the positions of the first micrometer 4 and the concrete test block 10 .

The first micrometer 4 is used to measure the shrinkage value of the concrete test block 10 in the height direction, which meets the needs of more test scenarios and can also be used as a reference for the measurement results of the shrinkage value along the length direction.

The second micrometer 5 is used to measure the shrinkage value of the concrete test block 10 in the length direction. Micrometers are set at the left and right free ends for simultaneous measurement, which will make the result of the shrinkage value of the concrete test block 10 in the main length direction more accurate.

The test block fixing mechanism 6 is a device for fixing the concrete test block 10, and includes a detachable baffle 61 and a variable baffle device, thereby improving the stability of the fixation of the concrete test block 10 and increasing the accuracy of the test shrinkage value;

The detachable baffle 61 is a detachable baffle on the side of the concrete test block 10 close to the push-pull handle 22, which provides resistance to one side of the concrete test block 10 to prevent the concrete test block 10 from shaking left and right and affecting the accuracy of the experiment;

The fixing frame 62 is a working groove for the screw rod 63 and the rotating nut 64 on the screw rod 63, and also serves as a protection for the experimenter to avoid unnecessary dangers caused by the screw rod 63 during operation. The upper top surface in the groove is rotatably connected to the upper top surface of the screw rod 63;

The screw rod 63 can rotate freely under the control of the fourth motor 69, providing the rotating nut 64 on the screw rod 63 with the ability to move up and down;

When the screw rod 63 works, the rotating nut 64 can move up and down along the height direction driven by the screw rod 63, driving the telescopic rod fixed to the rotating nut 64 to also move up and down;

One end of the sleeve 65 is fixedly connected to the rotating nut 64, and the other end is slidably connected to the connecting rod 67; the connecting rod 67 and the spring 66 in the sleeve 65 together form a telescopic rod.

After the variable baffle plate 68 of the spring 66 is squeezed by the concrete, the connecting rod 67 will slide into the sleeve 65. The spring 66 gives the connecting rod 67 a reverse resistance force by elastic force, so that the connecting rod 67 will not completely slide into the sleeve 65, thereby maintaining the stability of the telescopic rod.

One end of the connecting rod 67 is embedded and slidably connected in the sleeve 65 and contacts the spring 66 in the sleeve 65, and the other end is fixedly connected to the variable baffle 68, so that the pressure of the concrete test block 10 on the variable baffle 68 is received and transmitted to the contacting spring 66, causing the spring 66 to be compressed;

One side of the displaceable baffle plate 68 is fixed to the connecting rod 67, and the other side is in contact with the concrete test block 10, and cooperates with the detachable baffle plate 61 to maintain the stability of the concrete test block 10 during the test;

The fourth motor 69 controls the operation of the screw rod 63 . After being started, the screw rod 63 can rotate on its own and drive the rotating nut 64 to move.

The first moving device 7 is used to provide the second moving device 8, the third moving device 9 and the second micrometer 5 with a left-right movement capability;

One end of the slide bar 71 is connected to the handle 72, and the other end is connected to the slider 73. When the handle 72 is operated, the slide bar 71 and the slider 73 can be driven to move in the slide groove 11 of the fixed platform 1 along the left and right directions.

The handle 72 can drive the slide bar 71, the second moving device 8 and the third moving device 9 to move in left and right directions;

The slider 73 is fixed to the slide bar 71 , and when the operating handle 72 and the slide bar 71 move, they will move left and right in the slide slot 11 provided on the fixed platform 1 , and at the same time drive the second moving device 8 and the third moving device 9 to move left and right as well.

The second moving device 8 is used to give the third moving device 9 and the second micrometer 5 the ability to move along the length direction;

The bottom center of the second moving frame 81 is fixed to the slider 73, and can stably follow the movement of the slider 73. At the same time, the internal slot serves as the working space of the second screw rod 82 and the second moving nut 84;

The second sliding groove 811 is a working space of the second screw rod 82 and a moving groove of the second moving nut 84. The second screw rod 82 and the second moving nut 84 on the second screw rod 82 can respectively rotate in the groove and move linearly along the screw rod under the control of the second motor 83.

The second screw rod 82 rotates in the second slide slot 811 under the control of the second motor 83, driving the second movable nut 84 to move linearly;

The second motor 83 controls the operation of the second moving device 8. After the second motor 83 is turned on, the second screw rod 82 rotates in the second slide groove 811 to drive the second moving nut 84 and the third moving device 9 fixed to the second moving nut 84 to move.

The second movable nut 84 is sleeved on the second screw rod 82 and can move linearly along the second screw rod 82 when the second screw rod 82 rotates, thereby driving the third movable device 9 fixed above the second movable nut 84 to move.

The third moving device 9 provides the second micrometer 5 with the ability to adjust its position along the height direction of the concrete test block 10. The position of the second micrometer 5 can be adjusted according to the height of the concrete test block 10 so that the second micrometer 5 is located at the middle position of the height of the concrete test block 10, so that the measurement result is more accurate.

The third moving frame 91 is a rectangular parallelepiped structure as a whole, with an opening facing the concrete to form a third slide slot 911, and a circular hole is also opened in the center of the top for the third motor 93 on the top to connect with the third screw rod 92 in the slot, providing a working range for the third screw rod 92 and the third moving nut 94 on the third screw rod 92, and also playing a protective role;

The third slide groove 911 provides a space for the third screw rod 92 and the third movable nut 94 to slide. When the third screw rod 92 is working, the third movable nut 94 can move up and down along the third screw rod 92 in the third slide groove 911 to drive the arm 95 of the second micrometer 5 to move in the same direction and position. The second micrometer 5 can be adjusted to the middle of the height of the concrete test block 10 as the arm 95 moves up and down.

The third screw rod 92 can rotate freely under the control of the third motor 93, providing the third movable nut 94 on the third screw rod 92 with the ability to move up and down;

After the third motor 93 is started, it can drive the entire third moving device 9 to work, providing the second micrometer 5 with the ability to adjust its position along the concrete height direction;

When the third screw rod 92 is working, the third movable nut 94 can move up and down along the third screw rod 92, driving the hanging arm 95 fixed to the third movable nut 94 to move up and down as well;

One end of the suspension arm 95 is fixedly connected to the third movable nut 94 and moves along with the movement of the third movable nut 94 , and the other end is fixedly connected to hang the second micrometer 5 , thus solving the connection problem between the second micrometer 5 and the third movable nut 94 .

The concrete test block 10 is a concrete test block to be tested, and the design of the test block fixing mechanism 6 takes into account both cylindrical test pieces and cubic test pieces.

In the present invention, all the screw rods mentioned can be screw rods or electric screw rods.

Finally, it should be noted that the above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims (10)

1. An improved concrete shrinkage test detection device, comprising a control device, characterized in that it also comprises: a fixed platform (1), one side of the fixed platform (1) is provided with an installation opening inwardly, and both ends of the fixed platform (1) are symmetrically provided with sliding grooves (11); A mobile platform (2), the mobile platform (2) is slidably mounted in a mounting opening of the fixed platform (1); A first micrometer adjustment mechanism (3), the first micrometer adjustment mechanism (3) being arranged above the middle portion of the other side of the fixed platform (1); A first micrometer (4), the first micrometer (4) being mounted on the first micrometer adjustment mechanism (3); A second micrometer (5), the second micrometer (5) being mounted on a second micrometer adjustment mechanism; A test block fixing mechanism (6), wherein the test block fixing mechanism (6) is arranged on the mobile platform (2); A second dial gauge adjustment mechanism, the second dial gauge adjustment mechanism comprising: a first moving device (7), the first moving device (7) being slidably mounted in a slide groove (11); A second moving device (8), the second moving device (8) is connected above the first moving device (7); A third moving device (9), the third moving device (9) is connected above the second moving device (8); The test block fixing mechanism (6) is used to fix the concrete test block (10). 2. An improved concrete shrinkage test detection equipment according to claim 1 is characterized in that the fixed platform (1) is a rectangular parallelepiped structure as a whole, and fixed supports (12) are provided at the four corners below the fixed platform (1); the slide groove (11) is located at the end of the fixed platform (1) on the mounting port side of the fixed platform (1), wherein grooves are provided on the inner walls at both ends of the mounting port of the fixed platform (1); the slide groove (11) is a T-shaped groove as a whole. 3. An improved concrete shrinkage test detection equipment according to claim 1 is characterized in that bosses adapted to the grooves of the fixed platform (1) are provided at both ends of the mobile platform (2), movable brackets (21) are provided at the four corners of the mobile platform (2), and a push-pull handle (22) is provided on one side of the mobile platform (2), wherein a support (23) is symmetrically provided on the upper surface of the mobile platform (2). 4. The improved concrete shrinkage test detection device according to claim 1, characterized in that the first dial gauge adjustment mechanism (3) comprises: A first adjustment bracket (31), wherein a first sliding groove (311) is provided on the first adjustment bracket (31); A first screw rod (32), the first screw rod (32) is rotatably connected in the first slide groove (311); A first motor (33), the first motor (33) is located below the fixed platform (1), and a rotating shaft of the first motor (33) passes through the fixed platform (1) and is connected to the first screw rod (32); A first movable nut (34), the first movable nut (34) being threadedly connected to the first screw rod (32); A hanger (35), one end of which is connected to the first movable nut (34); A movable fixing device (36), the movable fixing device (36) is slidably connected to the other end of the hanger (35); The first motor (33) is connected to the control device. 5. An improved concrete shrinkage test detection device according to claim 4, characterized in that the hanger (35) is in the shape of a Chinese character "中" as a whole, a slideway is provided through the other end of the hanger (35) along its length direction, and the movable fixing device (36) is detachably mounted on the slideway; The movable fixing device (36) comprises an upper connecting body and a lower connecting body and a plurality of fasteners connecting the upper connecting body and the lower connecting body together, and the first micrometer (4) is mounted on the movable fixing device (36). 6. The improved concrete shrinkage test detection device according to claim 1, characterized in that the first moving device (7) comprises: A slide bar (71), the slide bar (71) is slidably connected in the transverse groove of the slide groove (11); A handle (72), the handle (72) is connected to one end of the slide bar (71), and the handle (72) is located outside the fixed platform (1); The slider (73) is connected to the other end of the slide bar (71), and the slider (73) is slidably connected in the longitudinal groove of the slide groove (11). 7. The improved concrete shrinkage test detection device according to claim 1, characterized in that the second moving device (8) comprises: A second movable frame (81), wherein a second sliding groove (811) is provided on the second movable frame (81); A second screw rod (82), the second screw rod (82) is rotatably connected in the second slide groove (811); A second motor (83), the second motor (83) is arranged on the outside of the second movable frame (81), and the rotation shaft of the second motor (83) passes through the outer plate of the second movable frame (81) and is connected to the second screw rod (82); A second movable nut (84) is threadedly connected to the second screw rod (82), wherein the lower end of the second movable frame (81) is connected to the upper end of the slider (73), and the second motor (83) is connected to the control device. 8. The improved concrete shrinkage test detection device according to claim 1, characterized in that the third moving device (9) comprises: A third movable frame (91), wherein a third sliding groove (911) is provided on the third movable frame (91); A third screw rod (92), the third screw rod (92) is rotatably connected to the third sliding groove (911); A third motor (93), the third motor (93) is arranged above the third moving frame (91), and the rotating shaft of the third motor (93) passes through the top plate of the third moving frame (91) and is connected to the third screw rod (92); A third movable nut (94), the third movable nut (94) being threadedly connected to the third screw rod (92); A suspension arm (95), one end of the suspension arm (95) is connected to the third movable nut (94), and the other end of the suspension arm (95) is installed with a second micrometer (5); The lower end of the third movable frame (91) is connected to the upper end of the second movable nut (84), and the third motor (93) is connected to the control device. 9. The improved concrete shrinkage test detection equipment according to claim 1, characterized in that the test block fixing mechanism (6) comprises: A detachable baffle (61), which is detachably mounted above two supports (23) of the movable platform (2) near the push-pull handle (22); A variable baffle device is arranged in the middle of the upper part of two supporting platforms (23) of the movable platform (2) near the first micrometer adjustment mechanism (3). Wherein, the height of the variable baffle device is lower than the height of the first adjustment bracket (31). 10. An improved concrete shrinkage test detection device according to claim 9, characterized in that the variable position baffle device comprises: A fixed frame (62), the lower end of which is connected to the movable platform (2), and a movable slot is provided in the fixed frame (62); A screw rod (63), the screw rod (63) is rotatably connected in the movable groove; A rotating nut (64) is threadedly connected to the screw rod (63); A telescopic rod, one end of which is connected to a rotating nut (64); A variable baffle plate (68), the variable baffle plate (68) is connected to the other end of the telescopic rod; A fourth motor (69), the motor (69) is connected below the mobile platform (2), and a rotating shaft of the fourth motor (69) passes through the mobile platform (2) and is connected to the screw rod (63); The telescopic rod comprises: a sleeve (65), one end of which is connected to a rotating nut (64); A spring (66), wherein the spring (66) is sleeved in the sleeve (65); A connecting rod (67), one end of the connecting rod (67) is in contact with and connected to the spring (66); The fourth motor (69) is connected to the control device.