Concrete shrinkage test detection equipment

Abstract

The utility model discloses detection equipment for a concrete shrinkage test. The detection equipment comprises control equipment, a mounting opening and a sliding groove are formed in the fixed platform; the moving platform is mounted in the mounting opening; the first dial indicator adjusting mechanism is arranged above the fixed platform; the first dial indicator is mounted on the first dial indicator adjusting mechanism; the second dial indicator adjusting mechanisms are respectively arranged on the two sliding chutes; the second dial indicator is mounted on the second dial indicator adjusting mechanism; and the test block fixing mechanism is arranged on the movable platform. The concrete shrinkage testing device is stable and reliable, solves the problems that only shrinkage in one direction can be detected, other shrinkage testing devices are low in adaptability to the shape and the size of the concrete test block, and the like, and has the function of testing the shrinkage of the concrete test block in the other direction, and the test block inclusiveness of the concrete shrinkage testing device is improved.

Description

Technical Field

[0001] The utility model relates to a detection device, specifically a detection device for concrete shrinkage test, belonging to the technical field of concrete performance detection. Background Technique

[0002] Concrete shrinkage refers to the volume reduction phenomenon that occurs during the initial setting or hardening process of concrete. Concrete will cause volume reduction under dry conditions; it will expand in humid conditions (or in water). Once cracks occur in concrete, the steel bars inside will be exposed, prone to corrosion, which will 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.

[0003] With the development of science and technology, the testing equipment for concrete shrinkage is becoming more and more perfect. However, most of the current concrete shrinkage detection equipment on the market still has the disadvantages of limited applicable concrete size, only being able to detect shrinkage in one direction, and large equipment errors.

[0004] After retrieval, at present, the Chinese utility model patent with the publication number CN211292911U discloses a concrete shrinkage and expansion meter, but it has the following deficiencies: 1. It is impossible to adjust the position of the baffle according to the cross-sectional size of the concrete test block. Consequently, when measuring the shrinkage and expansion of concrete, the measured data is not the shrinkage and expansion value at the center of the cross-section of the concrete test block, which will cause errors in the test results; 2. It can only test the shrinkage and expansion values in 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.

[0005] The Chinese utility model patent with the publication number CN213875689U discloses a concrete shrinkage test device, but it has the following deficiencies: 1. The dial indicator is only flexible in one direction. Therefore, the adaptability of this device to concrete test blocks of different sizes is low. For test blocks with a larger cross-section, the dial indicator cannot measure the data at the center position of the cross-section, which has a certain impact on the test results; 2. It can only test the shrinkage value in one direction, and the test data lacks certain reference.

[0006] The Chinese utility model patent with the publication number CN220552385U discloses a concrete shrinkage test device, but there are deficiencies that the top dial indicator cannot move longitudinally and transversely and can only move vertically. When the longitudinal lengths of the tested test blocks are different, the top dial indicator cannot measure the value at the center of the top of the test block, resulting in non-standard test results; at the same time, the dial indicator that can move on the fixed plate can also only test test blocks with a certain cross-sectional size, and the applicability of the device to the tested test blocks is low.

[0007] Therefore, the key to solving the above technical problems is to develop a concrete shrinkage test detection device that is convenient for testing. Summary of the Invention

[0008] In view of the many defects and deficiencies in the above background technology, the utility model has made improvements and innovations. The purpose is to provide a stable and reliable concrete shrinkage test detection device, which solves the problems that affect the test, such as low adaptability of the detection device to the size of concrete and the ability to only detect shrinkage in one direction during the shrinkage test. At the same time, it also provides the function of testing the shrinkage of concrete test blocks in another direction, making the test results comparable and providing a reference for the experimental results.

[0009] Another object of the present invention is to improve the adaptability of the test device to concrete of different sizes.

[0010] To solve the above problems and achieve the above object of the invention, a concrete shrinkage test detection device of the utility model is realized by adopting the following design structure and the following technical solutions:

[0011] A concrete shrinkage test detection device includes a control device, and further includes: a fixed platform (1), an installation opening is formed inwardly on one side of the fixed platform (1), and sliding grooves (11) are symmetrically formed at both ends of the fixed platform (1);

[0012] A moving platform (2) is slidably installed in the installation opening of the fixed platform (1);

[0013] A first dial indicator adjusting mechanism (3) is arranged above the middle of the other side of the fixed platform (1);

[0014] A first dial indicator (4) is installed on the first dial indicator adjusting mechanism (3);

[0015] A second dial indicator adjusting mechanism is respectively installed on the two sliding grooves (11);

[0016] A second dial indicator (5) is installed on the second dial indicator adjusting mechanism;

[0017] A test block fixing mechanism (6) is arranged on the moving platform (2);

[0018] Among them, the test block fixing mechanism (6) is used to fix the concrete test block (10).

[0019] Preferably, the fixed platform (1) is integrally in a cuboid structure, and fixed supports (12) are further provided at the four corners below the fixed platform (1). The sliding groove (11) is located at the end of the fixed platform (1) on the side of the installation opening of the fixed platform (1). Among them, grooves are further opened on the inner walls at both ends of the installation opening of the fixed platform (1); the sliding groove (11) is an overall T-shaped groove.

[0020] Preferably, convex platforms adapted to the grooves of the fixed platform (1) are provided at both ends of the moving platform (2), movable brackets (21) are respectively provided at the four corners of the moving platform (2), and a push-pull handle (22) is further provided on one side of the moving platform (2). Among them, bearing platforms (23) are symmetrically provided on the upper surface of the moving platform (2).

[0021] Preferably, the first dial indicator adjusting mechanism (3) includes:

[0022] A first adjusting bracket (31) with a first sliding groove (311) opened thereon;

[0023] A first lead screw (32) rotatably connected in the first sliding groove (311);

[0024] A first motor (33) located below the fixed platform (1), and the rotating shaft of the first motor (33) penetrates the fixed platform (1) and is connected to the first lead screw (32);

[0025] A first moving nut (34) threadedly connected to the first lead screw (32);

[0026] A suspension bracket (35) with one end connected to the first moving nut (34);

[0027] A mobile fixing device (36) slidably connected to the other end of the suspension bracket (35);

[0028] Among them, the first motor (33) is connected to the control device.

[0029] Preferably, the suspension bracket (35) is integrally in a "middle" shape, and a slideway is opened through the other end of the suspension bracket (35) along the length direction, and the mobile fixing device (36) is detachably installed on the slideway.

[0030] Preferably, the second dial indicator adjusting mechanism includes: a first moving device (7) slidably installed in the sliding groove (11);

[0031] A second moving device (8) connected above the first moving device (7);

[0032] The third moving device (9), the third moving device (9) is connected above the second moving device (8);

[0033] Wherein, the first moving device (7) includes:

[0034] A sliding rod (71), the sliding rod (71) is slidably connected in the transverse groove of the sliding groove (11);

[0035] A handle (72), the handle (72) is connected to one end of the sliding rod (71), and the handle (72) is located outside the fixed platform (1);

[0036] A slider (73), the slider (73) is connected to the other end of the sliding rod (71), and the slider (73) is slidably connected in the longitudinal groove of the sliding groove (11).

[0037] Preferably, the second moving device (8) includes:

[0038] A second moving frame (81), a second sliding groove (811) is formed on the second moving frame (81);

[0039] A second lead screw (82), the second lead screw (82) is rotatably connected in the second sliding groove (811);

[0040] A second motor (83), the second motor (83) is arranged outside the second moving frame (81), and the rotating shaft of the second motor (83) penetrates the outer plate of the second moving frame (81) and is connected to the second lead screw (82);

[0041] A second moving nut (84), the second moving nut (84) is threadedly connected to the second lead screw (82), wherein the lower end of the second moving frame (81) is connected to the upper end of the slider (73), and the second motor (83) is connected to the control device.

[0042] Preferably, the third moving device (9) includes:

[0043] A third moving frame (91), a third sliding groove (911) is formed on the third moving frame (91);

[0044] A third lead screw (92), the third lead screw (92) is rotatably connected in the third sliding groove (911);

[0045] 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) penetrates the top plate of the third moving frame (91) and is connected to the third lead screw (92);

[0046] A third moving nut (94), the third moving nut (94) is threadedly connected to the third lead screw (92);

[0047] The boom (95), one end of the boom (95) is connected to the third moving nut (94), and a second dial indicator (5) is installed at the other end of the boom (95);

[0048] Among them, 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.

[0049] Preferably, the test block fixing mechanism (6) includes:

[0050] A detachable baffle (61), the detachable baffle (61) is detachably installed above the two bearing platforms (23) of the moving platform (2) near the push-pull handle (22);

[0051] A variable-position baffle device, the variable-position baffle device is arranged in the middle above the two bearing platforms (23) of the moving platform (2) near the first dial indicator adjusting mechanism (3),

[0052] Among them, the height of the variable-position baffle device is lower than the height of the first dial indicator adjusting mechanism (3).

[0053] Preferably, the variable-position baffle device includes:

[0054] A fixing frame (62), the lower end of the fixing frame (62) is connected to the moving platform (2), and a moving groove is provided on the fixing frame (62);

[0055] A lead screw (63), the lead screw (63) is rotatably connected in the moving groove;

[0056] A rotating nut (64), the rotating nut (64) is threadedly connected to the lead screw (63);

[0057] A telescopic rod, one end of the telescopic rod is connected to the rotating nut (64);

[0058] A variable-position baffle (68), the variable-position baffle (68) is connected to the other end of the telescopic rod;

[0059] A fourth motor (69), the fourth motor (69) is connected below the moving platform (2), and the rotating shaft of the fourth motor (69) penetrates the moving platform (2) and is connected to the lead screw (63);

[0060] Among them, the fourth motor (69) is connected to the control device.

[0061] The working principle is: Before using a concrete shrinkage test and detection device with the above design structure, it is necessary to install the already manufactured concrete shrinkage test and detection device with this design structure as a backup.

[0062] The specific usage steps are:

[0063] Step 1: The operator pulls out the mobile platform (2) by pushing and pulling the handle (22), removes the detachable baffle (61). First, place the concrete test block (10) in the center of the bearing platform (23) without contacting the variable-position baffle (68). Then, according to the size of the surface of the concrete test block (10) corresponding to the variable-position baffle (68), the operator operates the fourth motor (69) to drive the lead screw (63), and the rotating nut (64) starts to move vertically under the drive of the lead screw (63). The movement of the rotating nut (64) drives the telescopic rod to move vertically to adjust the position of the variable-position baffle (68), and adjusts the variable-position baffle (68) to the center of the corresponding surface of the concrete test block (10). Immediately afterwards, the operator gently pushes the concrete test block (10) towards the direction of the detachable baffle (61) until the other side of the concrete test block (10) reaches the 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);

[0064] Step 2: After the concrete test block (10) is fixed, the operator pushes the mobile platform (2) completely into the fixed platform (1) by pushing and pulling the handle (22) to better fix the concrete test block (10) between the detachable baffle (61) and the variable-position baffle (68). Then, according to the size of the concrete test block (10), the operator holds the handles (72) on both sides of the fixed platform (1) and drives the second dial indicator (5) on the second dial indicator adjustment mechanism to move horizontally until the second dial indicator (5) is in the horizontal middle of the concrete test block (10);

[0065] Subsequently, the operator controls the third motor (93) through the control device. After the third motor (93) starts, it drives the third lead screw (92) to rotate, and then drives the third moving nut (94) threadedly connected to the third lead screw (92) to move, thereby driving the boom (95) connected to the third moving nut (94) to drive the second dial indicator (5) to move vertically until the pointer of the second dial indicator (5) is located in the middle position of the vertical thickness of the concrete test block (10);

[0066] Immediately afterwards, the operator controls the second motor (83) through the control device. After the second motor (83) starts, it drives the second lead screw (82) to rotate, and then drives the second moving nut (84) threadedly connected to the second lead screw (82) to move, thereby driving the third moving device (9) and the second dial indicator (5) on the third moving device (9) to move towards the concrete test block (10) until the probe of the second dial indicator (5) completely touches the concrete test block (10), and then turns off the second motor (83);

[0067] Finally, until the probes of the second dial indicators (5) at both ends of the fixed platform (1) are in full contact with the concrete test block (10); the second dial indicators (5) at both ends are operated according to the above basic steps, but they are not the only operating steps;

[0068] Step 3: The operator drives the first dial indicator (4) connected thereto along the slideway of the hanger (35) through the mobile fixing device (36) until the first dial indicator (4) is located at the exact center of the upper surface of the concrete test block (10), and then tightens the four fasteners on the mobile fixing device (36);

[0069] Then, the operator turns on the first motor (33) below the fixed platform (1) through the control device. After the first motor (33) starts, it drives the first lead screw (32) to rotate, and then drives the first moving nut (34) threadedly connected to the first lead screw (32) to move, thereby driving the hanger (35) connected to the first moving nut (34) to move. Further, the hanger (35) drives the mobile fixing device (36) connected thereto to drive the first dial indicator (4) to move towards the concrete test block (10). Finally, until the probe of the first dial indicator (4) is in full contact with the upper surface of the concrete test block (10), the first motor (33) stops working.

[0070] The beneficial effects of the present utility model compared with the prior art are as follows:

[0071] 1. The second dial indicator adjusting mechanism of the present utility model can drive the second dial indicator to move freely within a certain range in the horizontal, vertical, and longitudinal directions, improving the adaptability of the testing device to concrete of different sizes;

[0072] 2. While the present utility model can detect the unidirectional shrinkage of the concrete test block, it also provides the ability to test the shrinkage of the concrete test block in another direction, making the test results comparable and providing a reference for the experimental results;

[0073] 3. The test block fixing mechanism of the present utility model provides a certain elasticity for the variable-position baffle, can flexibly adjust the height according to the size of the concrete test block, and cooperates with the detachable baffle to fix the position of the concrete test block, which is especially helpful for the stability of the cylindrical test block;

[0074] 4. The present utility model provides a push-pull movable platform, making the placement of the concrete test block more convenient. At the same time, two thin strip-shaped bearing platforms are added on the movable platform, reducing the influence of the friction between the concrete test block and the movable platform on the shrinkage of the concrete test block to a certain extent;

[0075] 5. The variable-position baffle device of the present utility model can enable the variable-position baffle to vertically displace along the lead screw, and the telescopic rod can longitudinally change its position under the action of the built-in spring to adapt to the size of the concrete test block;

[0076] 6. The hanger of the present utility model is ingeniously designed with a "zhong" character structure, which can make the first dial indicator more flexible when changing its height with the size of the concrete specimen, eliminating the influence of the height problem of the variable-position baffle device on the up and down movement of the first dial indicator;

[0077] 7. The present utility model fixes the adjusted first dial indicator on the mobile fixing device, which can ensure no deviation during the test and guarantee the accuracy of the test results;

[0078] 8. The upper surface of the mobile platform of the present utility model is provided with a test block fixing mechanism, which can make it more convenient to install the concrete test block and make the device more adaptable to the size of the test block. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the drawings, where:

[0080] Figure 1 is one of the usage state diagrams of the present utility model;

[0081] Figure 2 is the second usage state diagram of the present utility model;

[0082] Figure 3 is the third usage state diagram of the present utility model;

[0083] Figure 4 is the fourth usage state diagram of the present utility model;

[0084] Figure 5 is the fifth usage state diagram of the present utility model;

[0085] Figure 6 is the sixth usage state diagram of the present utility model;

[0086] Figure 7 is the seventh usage state diagram of the present utility model;

[0087] Figure 8 is the eighth usage state diagram of the present utility model;

[0088] Figure 9 is one of the overall structure schematic diagrams of the present utility model;

[0089] Figure 10 is the second overall structure schematic diagram of the present utility model;

[0090] Figure 11is one of the schematic plan views of the present utility model;

[0091] Figure 12 is the second schematic plan view of the present utility model;

[0092] Figure 13 is the partial structural schematic view of the test block fixing mechanism (6) component of the present utility model;

[0093] Among them, the reference numerals in the figure: 1 - fixed platform, 11 - chute, 12 - fixed support;

[0094] 2 - moving platform, 21 - movable support, 22 - push-pull handle, 23 - bearing platform;

[0095] 3 - first dial indicator adjusting mechanism, 31 - first adjusting bracket, 311 - first chute, 32 - first lead screw, 33 - first motor, 34 - first moving nut, 35 - hanging bracket, 36 - movable fixing device;

[0096] 4 - first dial indicator;

[0097] 5 - second dial indicator;

[0098] 6 - test block fixing mechanism, 61 - detachable baffle, 62 - fixing frame, 63 - lead screw, 64 - rotating nut, 65 - sleeve, 66 - spring, 67 - connecting rod, 68 - variable-position baffle, 69 - fourth motor;

[0099] 7 - first moving device, 71 - slide bar, 72 - handle, 73 - slider;

[0100] 8 - second moving device, 81 - second moving frame, 811 - second chute, 82 - second lead screw, 83 - second motor, 84 - second moving nut;

[0101] 9 - third moving device, 91 - third moving frame, 911 - third chute, 92 - third lead screw, 93 - third motor, 94 - third moving nut, 95 - jib;

[0102] 10 - concrete test block. Specific embodiments

[0103] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the technical solutions of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0104] As shown in the specification appendix Figure 1 to the specification appendixFigure 13 A concrete shrinkage test detection device as shown includes a control device and further includes: a fixed platform 1, with an installation opening inwardly provided on one side of the fixed platform 1, and symmetrically provided with sliding grooves 11 at both ends of the fixed platform 1;

[0105] A moving platform 2, which is slidably installed in the installation opening of the fixed platform 1;

[0106] A first dial indicator adjusting mechanism 3, which is arranged above the middle of the other side of the fixed platform 1;

[0107] A first dial indicator 4, which is installed on the first dial indicator adjusting mechanism 3;

[0108] A second dial indicator adjusting mechanism, which is respectively installed on the two sliding grooves 11;

[0109] A second dial indicator 5, which is installed on the second dial indicator adjusting mechanism;

[0110] A test block fixing mechanism 6, which is arranged on the moving platform 2;

[0111] Among them, the test block fixing mechanism 6 is used to fix the concrete test block 10.

[0112] Furthermore, as Figure 9 shown, the fixed platform 1 is integrally in a cuboid shape, and fixed supports 12 are also provided at the four corners under the fixed platform 1. The sliding grooves 11 are located at the ends of the fixed platform 1 on the side of the installation opening of the fixed platform 1. Among them, grooves are also provided on the inner walls at both ends of the installation opening of the fixed platform 1; the sliding grooves 11 are integrally T-shaped grooves.

[0113] In the present utility model, the transverse groove of the sliding groove 11 is opened through the outside of the fixed platform 1, and the longitudinal groove of the sliding groove 11 is opened through the top surface of the fixed platform 1. The transverse groove and the longitudinal groove are arranged to be communicated; the sliding groove 11 is used for the first moving device 7 to move horizontally.

[0114] Furthermore, as Figure 2 and Figure 7 as well as Figure 9 shown, convex platforms adapted to the grooves of the fixed platform 1 are provided at both ends of the moving platform 2. Movable brackets 21 are respectively provided at the four corners under the moving platform 2. A push-pull handle 22 is also provided on one side of the moving platform 2. Among them, bearing platforms 23 are symmetrically provided on the upper surface of the moving platform 2.

[0115] In the present utility model, four movable brackets 21 are installed at the lower end of the movable platform 2. The movable platform 2 is pulled outwards and combined with the boss through the movable brackets 21, which provides convenience for placing the concrete test block 10; the bearing platform 23 is a strip-shaped cuboid bearing platform, and clamping grooves adapted to the detachable baffle 61 are also provided on the two bearing platforms 23.

[0116] Furthermore, as Figure 2 shown, the first dial indicator adjusting mechanism 3 includes:

[0117] A first adjusting bracket 31, on which a first sliding groove 311 is provided;

[0118] A first lead screw 32, which is rotatably connected in the first sliding groove 311;

[0119] A first motor 33, which is located below the fixed platform 1, and the rotating shaft of the first motor 33 penetrates through the fixed platform 1 and is connected to the first lead screw 32;

[0120] A first moving nut 34, which is threadedly connected to the first lead screw 32;

[0121] A hanging bracket 35, one end of which is connected to the first moving nut 34;

[0122] A mobile fixing device 36, which is slidably connected to the other end of the hanging bracket 35;

[0123] Among them, the first motor 33 is connected to the control device.

[0124] Specifically, the hanging bracket 35 is integrally in the shape of a Chinese character 'zhong', and a sliding groove is provided through the other end of the hanging bracket 35 along the length direction, and the mobile fixing device 36 is detachably installed on the sliding groove.

[0125] In the present utility model, the mobile fixing device 36 includes an upper connecting body, a lower connecting body and several fasteners connecting the upper connecting body and the lower connecting body into one body, and the first dial indicator 4 is installed on the mobile fixing device 36.

[0126] In the present utility model, one end of the first dial indicator 4 penetrates through the middle parts of the upper connecting body and the lower connecting body; the rectangular hollow part of the hanging bracket 28 is located directly above the fixing bracket 62;

[0127] The mobile fixing device 36 is composed of two rectangular bodies to form a cube, which is divided into upper and lower shells, and the upper and lower shells are connected by four fastener screws.

[0128] Furthermore, as Figure 11 shown, the second dial indicator adjusting mechanism includes: a first moving device 7, and the first moving device 7 is slidably installed in the sliding groove 11;

[0129] A second mobile device 8, the second mobile device 8 being connected above the first mobile device 7;

[0130] A third mobile device 9, the third mobile device 9 being connected above the second mobile device 8;

[0131] Wherein, the first mobile device 7 includes:

[0132] A sliding rod 71, the sliding rod 71 being slidably connected in the transverse groove of the sliding groove 11;

[0133] A handle 72, the handle 72 being connected to one end of the sliding rod 71, and the handle 72 being located outside the fixed platform 1;

[0134] A slider 73, the slider 73 being connected to the other end of the sliding rod 71, and the slider 73 being slidably connected in the longitudinal groove of the sliding groove 11.

[0135] In the present utility model, the first mobile device 7 is used to provide lateral movement for the second mobile device 8; the upper surface of the slider 73 is slightly higher than the upper surface of the sliding groove 11, so that when the slider 73 drives the second mobile device 8 above to move laterally along the sliding groove 11, it is smoother.

[0136] Further, as Figure 11 shown, the second mobile device 8 includes:

[0137] A second mobile frame 81, a second sliding groove 811 being formed on the second mobile frame 81;

[0138] A second lead screw 82, the second lead screw 82 being rotatably connected in the second sliding groove 811;

[0139] A second motor 83, the second motor 83 being arranged outside the second mobile frame 81, and the rotating shaft of the second motor 83 passing through the outer plate of the second mobile frame 81 and being connected to the second lead screw 82;

[0140] A second mobile nut 84, the second mobile nut 84 being threadedly connected to the second lead screw 82, wherein the lower end of the second mobile frame 81 is connected to the upper end of the slider 73, and the second motor 83 is connected to the control device.

[0141] In the present utility model, the second mobile device 8 is used to provide longitudinal movement for the third mobile device 9; the rotating shaft of the second motor 83 is connected to the second lead screw 82 through a threaded hole; the upper surface of the second mobile nut 84 is slightly higher than the upper surface of the second sliding groove 811, so that when the second mobile nut 84 drives the third mobile device 9 above to move longitudinally along the second sliding groove 811, it is smoother.

[0142] Further, as Figure 11 shown, the third mobile device 9 includes:

[0143] The third moving frame 91 is provided with a third sliding groove 911 on it;

[0144] The third lead screw 92 is rotatably connected to the third sliding groove 911;

[0145] The third motor 93 is arranged above the third moving frame 91, and the rotating shaft of the third motor 93 penetrates through the top plate of the third moving frame 91 and is connected to the third lead screw 92;

[0146] The third moving nut 94 is threadedly connected to the third lead screw 92;

[0147] The boom 95, one end of the boom 95 is connected to the third moving nut 94, and the other end of the boom 95 is equipped with a second dial indicator 5;

[0148] Wherein, 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.

[0149] In the present utility model, the third moving device 9 is used to provide up and down movement for the second dial indicator 5; the rotating shaft of the third motor 93 is connected to the second lead screw 82 through a threaded hole; the hanging part of the boom 95 is provided with a hole suitable for the size of the arm of the second dial indicator 5.

[0150] Furthermore, as Figure 12 and Figure 13 shown, the test block fixing mechanism 6 includes:

[0151] The detachable baffle 61 is detachably installed above the two bearing platforms 23 of the moving platform 2 near the push-pull handle 22 side;

[0152] The variable-position baffle device is arranged in the middle above the two bearing platforms 23 of the moving platform 2 near the first dial indicator adjusting mechanism 3 side,

[0153] Wherein, the height of the variable-position baffle device is lower than the height of the first dial indicator adjusting mechanism 3.

[0154] In the present utility model, the variable-position baffle device can make the variable-position baffle 68 vertically displace along the lead screw 63, and the telescopic rod can longitudinally change its position under the action of the built-in spring to adapt to the size of the concrete test block 10.

[0155] Specifically, as Figure 12 and Figure 13 shown, the variable-position baffle device includes:

[0156] The fixing frame 62, the lower end of the fixing frame 62 is connected to the moving platform 2, and a moving groove is provided inside the fixing frame 62;

[0157] The lead screw 63 is rotatably connected within the moving groove;

[0158] The rotating nut 64 is threadedly connected to the lead screw 63;

[0159] The telescopic rod, one end of the telescopic rod is connected to the rotating nut 64;

[0160] The variable-position baffle 68, the variable-position baffle 68 is connected to the other end of the telescopic rod;

[0161] The fourth motor 69 is connected below the moving platform 2, and the rotating shaft of the fourth motor 69 penetrates through the moving platform 2 and is connected to the lead screw 63; wherein, the fourth motor 69 is connected to the control device.

[0162] In the present utility model, the telescopic rod includes: a sleeve 65, one end of the sleeve 65 is connected to the rotating nut 64; a spring 66, the spring 66 is sleeved within the sleeve 65; a connecting rod 67, one end of the connecting rod 67 is in contact connection with the spring 66.

[0163] In summary, a more specific implementation manner of the present utility model is:

[0164] Before a concrete shrinkage test detection device with the above design structure is used, it needs to be fabricated and installed for standby.

[0165] The specific usage steps are:

[0166] Step 1: The operator pulls out the moving platform 2 through the push-pull handle 22, removes the detachable baffle 61, first places the concrete test block 10 in the center of the bearing platform 23 without contacting the variable-position baffle 68. Then, according to the size of the surface of the concrete test block 10 corresponding to the variable-position baffle 68, the operator drives the lead screw 63 to work through the fourth motor 69. The rotating nut 64 starts to move vertically under the drive of the lead screw 63. The movement of the rotating nut 64 drives the telescopic rod to move vertically to adjust the position of the variable-position baffle 68, and adjusts the variable-position baffle 68 to the center of the corresponding surface of the concrete test block 10. Immediately afterwards, the operator gently pushes the concrete test block 10 towards the direction of 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, then fixes the detachable baffle 61. Then, the operator adjusts the small distance between the concrete test block 10 and the detachable baffle 61;

[0167] Step 2: After the concrete test block 10 is fixed, the operator pushes the push-pull handle 22 to fully push the moving platform 2 into the fixed platform 1, so that the concrete test block 10 is better fixed between the detachable baffle 61 and the variable-position baffle 68; then the operator drives the second dial indicator 5 on the second dial indicator adjusting mechanism to move horizontally by holding the handles 72 on both sides of the fixed platform 1 according to the size of the concrete test block 10 until the second dial indicator 5 is in the horizontal middle of the concrete test block 10;

[0168] Subsequently, the operator controls the third motor 93 through the control device. After the third motor 93 starts, it drives the third lead screw 92 to rotate, and then drives the third moving nut 94 threadedly connected to the third lead screw 92 to move, thereby driving the boom 95 connected to the third moving nut 94 to drive the second dial indicator 5 to move vertically until the pointer of the second dial indicator 5 is located in the middle position of the vertical thickness of the concrete test block 10;

[0169] Immediately afterwards, the operator controls the second motor 83 through the control device. After the second motor 83 starts, it drives the second lead screw 82 to rotate, and then drives the second moving nut 84 threadedly connected to the second lead screw 82 to move, thereby driving the third moving device 9 and the second dial indicator 5 on the third moving device 9 to move towards the concrete test block 10 until the probe of the second dial indicator 5 fully contacts the concrete test block 10, and then the second motor 83 is turned off;

[0170] Finally, until the probes of the second dial indicators 5 at both ends of the fixed platform 1 are all in full contact with the concrete test block 10; the second dial indicators 5 at both ends are all operated according to the above basic steps, but they are not the only operating steps;

[0171] Step 3: The operator drives the first dial indicator 4 connected thereto to move along the slideway of the hanger 35 through the mobile fixing device 36 until the first dial indicator 4 is located at the exact center of the upper surface of the concrete test block 10, and then tightens the four fasteners on the mobile fixing device 36;

[0172] Then, the operator turns on the first motor 33 below the fixed platform 1 through the control device. After the first motor 33 starts, it drives the first lead screw 32 to rotate, and then drives the first moving nut 34 threadedly connected to the first lead screw 32 to move, thereby driving the hanger 35 connected to the first moving nut 34 to move, and then the hanger 35 drives the mobile fixing device 36 connected thereto to drive the first dial indicator 4 to move towards the concrete test block 10. Finally, until the probe of the first dial indicator 4 fully contacts the upper surface of the concrete test block 10, the first motor 33 stops working.

[0173] During the entire above-mentioned implementation process, the fixed platform 1 serves as the basic workbench for the entire device, and all mechanical equipment for realizing functions is located on this fixed platform 1;

[0174] The chute 11 is essentially in a T shape, allowing 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 its left and right positions to adapt to the size of the concrete in one direction;

[0175] 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.

[0176] The moving platform 2 is the placement table for the concrete test block 10 and the test block fixing mechanism 6. At the same time, it is embedded in the fixed platform 1 and can be pulled out and inserted into the fixed platform 1 through the four movable brackets 21 and the push-pull handle 22 below. Such a design can avoid being affected by other devices on the fixed platform 1 when placing the test block;

[0177] The movable bracket 21 includes a fixed bracket and pulleys. Pulleys are installed at the lower end of the fixed bracket, allowing the upper moving platform 2 to be pulled out and inserted into the fixed platform 1;

[0178] The push-pull handle 22 is arranged on the outside of the moving platform 2, providing convenience for pulling out and inserting the moving platform 2 into the fixed platform 1 when placing the concrete test block 10;

[0179] The bearing platform 23 is a slender cuboid structure, fixed on the moving 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 moving platform 2 and avoid affecting the shrinkage of the concrete.

[0180] The first dial indicator adjusting mechanism 3 is a device for adjusting the position of the first dial indicator 4. It is located at the middle position at the rear of the fixed platform 1. By adjusting the first dial indicator 4 to the center of the upper surface of the test block according to the size of the upper surface of the concrete test block 10, then driving the first screw rod 32 and the first nut on the first screw rod 32 to move up and down by controlling the first motor 33 to adjust the height of the hanging bracket 35 until the tip of the first dial indicator 4 contacts the upper surface of the concrete test block 10 and the dial indicator is shrunk and zeroed, and then the first motor 33 is turned off, so as to realize the function of controlling the position of the first dial indicator 4 according to the size of the upper surface of the concrete. Such a design realizes the function of being able to adjust the position of the first dial indicator 4 according to the size of the upper surface of the concrete, and at the same time can measure the shrinkage of the concrete test block 10 in one direction more, 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;

[0181] The first adjusting bracket 31 controls the movement of the first lead screw 32 and the first moving nut 34 on the first lead screw 32 through the first motor 33 to achieve the control of the height positions of the hanging bracket 35 and the first dial indicator 4. This design enables the first dial indicator 4 to measure concrete test blocks 10 of various different heights;

[0182] The first sliding groove 311 is the working groove for the first lead screw 32 and the first moving nut 34. When the first motor 33 is started, the first lead screw 32 will rotate within the first sliding groove 311, and at the same time drive the first moving nut 34 to move up and down within the sliding groove 11. While serving as the working groove for the first lead screw 32 and the first moving nut 34, it is also a protective structure for the test personnel;

[0183] The first lead screw 32 rotates and works under the control of the first motor 33, and its function is to drive the up and down movement of the first moving nut 34;

[0184] The first motor 33 is connected to the first lead screw 32 through an opening at the corresponding position of the first dial indicator adjusting mechanism 3 on the fixed platform 1 to control the rotational work of the first lead screw 32;

[0185] The first moving nut 34 moves up and down under the rotational work of the first lead screw 32, driving the hanging bracket 35 fixed on the first moving nut 34 to move up and down to adjust the height position of the dial indicator;

[0186] The overall shape of the hanging bracket 35 is in the shape of a Chinese character 'zhong'. The part 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 downward adjustment of the height of the hanging bracket 35 and the dial indicator, and to a certain extent also improve the adaptability of the shrinkage test device to the height of the concrete test block 10;

[0187] The mobile fixing device 36 is used to fix the first dial indicator 4, and at the same time can adjust the position of the mobile fixing device 36 on the hanging bracket 35 by loosening and tightening the fasteners, so as to better adjust the position of the first dial indicator 4 and the concrete test block 10.

[0188] The first dial indicator 4 is used to measure the shrinkage value of the concrete test block 10 in the height direction, meeting the requirements of more test scenarios, and can also be used as a reference for the measurement results of the shrinkage value in the length direction.

[0189] The second dial indicator 5 is used to measure the shrinkage value of the concrete test block 10 in the length direction. By setting dial indicators at both left and right free ends for simultaneous measurement, the result of the shrinkage value in the main length direction of the concrete test block 10 will be more accurate.

[0190] The test block fixing mechanism 6, as a device for fixing the concrete test block 10, includes a detachable baffle 61 and a variable-position baffle device, thereby improving the stability of the fixing of the concrete test block 10 and increasing the accuracy of the test shrinkage value;

[0191] The detachable baffle 61 is a baffle that can be detached on the side of the concrete test block 10 close to the push-pull handle 22, providing resistance to one side of the concrete test block 10 and preventing the concrete test block 10 from shaking left and right and affecting the experimental accuracy;

[0192] The fixing frame 62 is the working groove of the lead screw 63 and the rotating nut 64 on the lead screw 63, and also serves as a protection for the experimenter to avoid unnecessary dangers generated when the lead screw 63 is working. The upper top surface in the groove is rotationally connected to the upper top surface of the lead screw 63;

[0193] The lead screw 63 can freely rotate under the control of the fourth motor 69, providing the rotating nut 64 on the lead screw 63 with the ability to move up and down;

[0194] When the lead screw 63 is working, the rotating nut 64 can move up and down along the height direction under the drive of the lead screw 63, driving the telescopic rod fixed to the rotating nut 64 to also move in the up and down direction;

[0195] 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.

[0196] After the variable-position baffle 68 is squeezed by the concrete, the connecting rod 67 will slide into the sleeve 65. The spring 66 relies on its elastic force to give the connecting rod 67 a reverse resistance, so that the connecting rod 67 will not completely slide into the inside of the sleeve 65, maintaining the stability of the telescopic rod;

[0197] One end of the connecting rod 67 is embedded and slidably connected inside the sleeve 65 and contacts the spring 66 in the sleeve 65, and the other end is fixedly connected to the variable-position baffle 68, bearing and transmitting the pressure of the concrete test block 10 received by the variable-position baffle 68 to the contacting spring 66, causing the spring 66 to compress;

[0198] One side of the variable-position baffle 68 is fixedly connected to the connecting rod 67, and the other side contacts the concrete test block 10, and together with the detachable baffle 61, it maintains the stability of the concrete test block 10 during the test;

[0199] The fourth motor 69 controls the operation of the lead screw 63. After starting, it can make the lead screw 63 rotate self - rotatably to drive the rotating nut 64 to move.

[0200] The first moving device 7 is used to provide the second moving device 8, the third moving device 9, and the second dial indicator 5 with the ability to move left and right;

[0201] One end of the sliding rod 71 is connected to the handle 72, and the other end is connected to the slider 73. When operating the handle 72, it can drive the sliding rod 71 and the slider 73 to move in the left - right direction within the chute 11 of the fixed platform 1.

[0202] The handle 72 can drive the sliding rod 71, the second moving device 8 and the third moving device 9 to move in the left - right direction.

[0203] The slider 73 is fixedly connected to the sliding rod 71. When operating the handle 72 and the sliding rod 71 to move, it will move left - right within the chute 11 opened on the fixed platform 1, and at the same time drive the second moving device 8 and the third moving device 9 to also move left - right.

[0204] The second moving device 8 is used to give the third moving device 9 and the second dial indicator 5 the ability to move along the length direction.

[0205] The center of the bottom of the second moving frame 81 is fixedly connected to the slider 73, and it can stably follow the movement of the slider 73. At the same time, the internal slot is used as the working space for the second lead screw 82 and the second moving nut 84.

[0206] The second chute 811 is the working space for the second lead screw 82 and the moving slot for the second moving nut 84. The second lead screw 82 and the second moving nut 84 on the second lead screw 82 can respectively perform self - rotation movement and linear movement along the screw within the slot under the control of the second motor 83.

[0207] The second lead screw 82 performs self - rotation movement within the second chute 811 under the control of the second motor 83, driving the second moving nut 84 to perform linear movement.

[0208] The second motor 83 controls the operation of the second moving device 8. After the second motor 83 is turned on, the second lead screw 82 will perform self - rotation movement within the second chute 811, driving the second moving nut 84 and the third moving device 9 fixedly connected to the second moving nut 84 to move.

[0209] The second moving nut 84 is sleeved on the second lead screw 82 and can perform linear movement along the second lead screw 82 when the second lead screw 82 performs self - rotation movement, driving the third moving device 9 fixedly connected above the second moving nut 84 to move.

[0210] The third moving device 9 provides the ability to adjust the position of the second dial indicator 5 along the height direction of the concrete test block 10. It can adjust the position of the second dial indicator 5 according to the height of the concrete test block 10 so that the second dial indicator 5 is located at the middle position of the height of the concrete test block 10, making the measurement result more accurate.

[0211] The third moving frame 91 is a cuboid-shaped structure as a whole. It is open on the side facing the concrete to form a third chute 911. A circular hole is also opened at the center of the upper part to connect the third motor 93 at the top with the third lead screw 92 in the chute, providing a working area for the third lead screw 92 and the third moving nut 94 on the third lead screw 92, and meanwhile playing a protective role;

[0212] The third chute 911 provides space for the third lead screw 92 and the third moving nut 94 to slide. When the third lead screw 92 is working, the third moving nut 94 can move up and down along the third lead screw 92 in the third chute 911 to drive the boom 95 of the second dial indicator 5 to move in the same direction and position. The second dial indicator 5 can be adjusted to the exact middle of the height of the concrete test block 10 as the boom 95 moves up and down;

[0213] The third lead screw 92 can rotate freely under the control of the third motor 93, providing the third moving nut 94 on the third lead screw 92 with the ability to move up and down;

[0214] After the third motor 93 is started, it can drive the entire third moving device 9 to work, providing the second dial indicator 5 with the ability to adjust its position along the height direction of the concrete;

[0215] When the third lead screw 92 is working, the third moving nut 94 can move up and down along the third lead screw 92, driving the boom 95 fixed on the third moving nut 94 to move in the up and down directions as well;

[0216] One end of the boom 95 is fixed on the third moving nut 94 and moves along with the movement of the third moving nut 94. The other end is fixedly suspended with the second dial indicator 5, solving the connection problem between the second dial indicator 5 and the third moving nut 94.

[0217] The concrete test block 10 is the concrete test block to be tested. The design of the test block fixing mechanism 6 takes into account both cylindrical specimens and cubic specimens.

[0218] In the present utility model, all the lead screws mentioned can also be screw rods or electric lead screws.

[0219] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and is not a limitation to the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A concrete shrinkage test detection device, including a control device, characterized in that, Also included are: A fixed platform (1), on one side of which there is an inwardly opened installation opening, and symmetrically arranged sliding grooves (11) are also provided at both ends of the fixed platform (1); A moving platform (2), which is slidably installed in the installation opening of the fixed platform (1); A first dial indicator adjusting mechanism (3), which is arranged above the middle of the other side of the fixed platform (1); A first dial indicator (4), which is installed on the first dial indicator adjusting mechanism (3); A second dial indicator adjusting mechanism, which is respectively installed on the two sliding grooves (11); A second dial indicator (5), which is installed on the second dial indicator adjusting mechanism; A test block fixing mechanism (6), which is arranged on the moving platform (2); Wherein, the test block fixing mechanism (6) is used to fix a concrete test block (10).

2. The concrete shrinkage test detection device according to claim 1, characterized in that, The fixed platform (1) is integrally in a cuboid structure, and fixed supports (12) are also provided at the four corners below the fixed platform (1). The sliding grooves (11) are located at the ends of the fixed platform (1) on the side of the installation opening of the fixed platform (1). Among them, grooves are also opened on the inner walls at both ends of the installation opening of the fixed platform (1); the sliding grooves (11) are integrally T-shaped grooves.

3. A concrete shrinkage test detection device according to claim 1, characterized in that, Both ends of the moving platform (2) are provided with bosses adapted to the grooves of the fixed platform (1), and movable brackets (21) are respectively provided at the four corners of the moving platform (2). A push-pull handle (22) is also provided on one side of the moving platform (2). Among them, bearing platforms (23) are symmetrically provided on the upper surface of the moving platform (2).

4. The concrete shrinkage test and detection equipment according to claim 1, characterized in that, The first dial indicator adjusting mechanism (3) includes: A first adjusting bracket (31), on which a first sliding groove (311) is opened; A first lead screw (32), which is rotatably connected in the first sliding groove (311); A first motor (33), which is located below the fixed platform (1), and the rotating shaft of the first motor (33) penetrates the fixed platform (1) and is connected to the first lead screw (32); A first moving nut (34), which is threadedly connected to the first lead screw (32); A hanger (35), one end of which is connected to the first moving nut (34); A mobile fixing device (36), which is slidably connected to the other end of the hanger (35); Wherein, the first motor (33) is connected to the control device.

5. A concrete shrinkage test detection device according to claim 4, characterized in that, The hanger (35) is integrally in a "middle" shape, and a slideway is opened through the other end of the hanger (35) along its length direction. The mobile fixing device (36) is detachably installed on the slideway.

6. The concrete shrinkage test and detection device according to claim 1, characterized in that, The second dial indicator adjusting mechanism includes: a first moving device (7), which is slidably installed in the sliding groove (11); A second moving device (8), which is connected above the first moving device (7); A third moving device (9), which is connected above the second moving device (8); Wherein, the first moving device (7) includes: The sliding rod (71) is slidably connected within the transverse groove of the sliding groove (11); The handle (72) is connected to one end of the sliding rod (71), and the handle (72) is located outside the fixed platform (1); The slider (73) is connected to the other end of the sliding rod (71), and the slider (73) is slidably connected within the longitudinal groove of the sliding groove (11).

7. A concrete shrinkage test detection device according to claim 6, characterized in that, The second moving device (8) includes: The second moving frame (81) is provided with a second sliding groove (811); The second lead screw (82) is rotatably connected within the second sliding groove (811); The second motor (83) is arranged outside the second moving frame (81), and the rotating shaft of the second motor (83) penetrates the outer plate of the second moving frame (81) and is connected to the second lead screw (82); The second moving nut (84) is threadedly connected to the second lead screw (82). Among them, the lower end of the second moving 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 concrete shrinkage test detection device according to claim 6, characterized in that, The third moving device (9) includes: The third moving frame (91) is provided with a third sliding groove (911); The third lead screw (92) is rotatably connected within the third sliding groove (911); The third motor (93) is arranged above the third moving frame (91), and the rotating shaft of the third motor (93) penetrates the top plate of the third moving frame (91) and is connected to the third lead screw (92); The third moving nut (94) is threadedly connected to the third lead screw (92); The lifting arm (95), one end of the lifting arm (95) is connected to the third moving nut (94), and a second dial indicator (5) is installed at the other end of the lifting arm (95); Among them, 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.

9. The concrete shrinkage test detection device according to claim 1, characterized in that, The test block fixing mechanism (6) includes: The detachable baffle (61) is detachably installed above the two bearing platforms (23) of the moving platform (2) near the push-pull handle (22); The variable-position baffle device is arranged in the middle above the two bearing platforms (23) of the moving platform (2) near the first dial indicator adjusting mechanism (3), Among them, the height of the variable-position baffle device is lower than the height of the first dial indicator adjusting mechanism (3).

10. A concrete shrinkage test detection device according to claim 9, characterized in that, The variable-position baffle device includes: The fixing frame (62), the lower end of the fixing frame (62) is connected to the moving platform (2), and a moving groove is provided within the fixing frame (62); The lead screw (63) is rotatably connected within the moving groove; The rotating nut (64) is threadedly connected to the lead screw (63); The telescopic rod, one end of the telescopic rod is connected to the rotating nut (64); The variable-position baffle (68) is connected to the other end of the telescopic rod; The fourth motor (69) is connected below the mobile platform (2), and the rotating shaft of the fourth motor (69) penetrates through the mobile platform (2) and is connected to the lead screw (63); Among them, the fourth motor (69) is connected to the control device.

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