Concrete dry shrinkage performance detection device

Abstract

The utility model relates to the technical field of concrete performance detection equipment, in particular to a concrete drying shrinkage performance detection device which comprises a mounting frame, a sliding frame is connected to the inner side of the mounting frame in a sliding mode, a dial indicator and a spring telescopic rod are fixedly connected to the inner side of the sliding frame, and a pressing plate is fixedly connected to the bottom of the spring telescopic rod; the lifting device is fixedly connected to the top of the mounting frame, and the bottom of the lifting device is rotationally connected with the sliding frame; in the process that a worker adjusts the height of the internal threaded pipe, the worker can judge whether the insertion groove is aligned with the threaded positioning pin or not by feeling the pause of the insertion ring entering and exiting the insertion groove, blind insertion operation does not need to be conducted by experience, the positioning difficulty of the worker is effectively reduced, and the worker can conveniently adjust the height of the internal threaded pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete performance detection equipment, in particular to a concrete shrinkage performance detection device. Background Art

[0002] In construction projects, concrete is one of the commonly used construction materials. After solidifying into a solid block, concrete will still expand and contract due to temperature changes in nature. Therefore, people need to use a micrometer to test the shrinkage and expansion of the experimental concrete block before pouring concrete.

[0003] At present, a Chinese patent discloses a concrete shrinkage test device (publication number CN216387062U), which is provided with a placement plate and a test frame. The test frame is lifted and lowered in the vertical direction on the inner wall of the installation frame. The concrete block to be tested is placed on the upper surface of the placement plate. The test frame is moved downward so that the test head of the micrometer and the lap plate press the concrete block to be tested, so that there is no lap on the side of the concrete block to be tested, thereby eliminating the influence of friction in the vertical direction on the measurement. The concrete block to be tested is rotated 90 degrees, and the expansion and contraction values ​​of the two sides of the concrete block to be tested in the horizontal direction can be measured.

[0004] Since the above-mentioned device positions threaded sleeves of different heights through the plug-in slot and the limit column, however, the above-mentioned plug-in slot needs to be connected to the limit column on the inner side of the limit ring, the staff needs to align it in advance and then screw the limit column into the plug-in slot. During this process, the staff needs to hold the height of the locked threaded sleeve, which undoubtedly increases the difficulty for the staff to lock the threaded sleeve and is inconvenient for the staff to perform the locking operation.

[0005] Therefore, a concrete shrinkage performance detection device is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a concrete shrinkage performance detection device in order to solve the above-mentioned problem, thereby improving the problem that the existing concrete shrinkage performance detection device with adjustable detection height has high difficulty in lifting and adjusting operation and is inconvenient for staff to use.

[0007] The utility model achieves the above-mentioned purpose through the following technical scheme, a concrete shrinkage performance detection device comprises: a mounting frame, the inner side of the mounting frame is slidably connected to a sliding frame, the inner side of the sliding frame is fixedly connected to a dial gauge and a spring telescopic rod, the bottom of the spring telescopic rod is fixedly connected to a pressure plate; a lifting device, the lifting device is fixedly connected to the top of the mounting frame, and the bottom of the lifting device is rotatably connected to the sliding frame.

[0008] Preferably, the lifting device includes a sliding sleeve fixedly connected to the top of the mounting frame, the inner side of the sliding sleeve is slidably connected with an internal threaded tube, the inner side of the internal threaded tube is threadedly connected with a threaded adjustment rod rotatably connected to the sliding frame, the surface of the internal threaded tube is provided with evenly distributed slots, the inner side of the sliding sleeve is provided with a metal spring, the metal spring is always in a compressed state, one end of the metal spring is fixedly connected with an insert ring fixedly connected to an adjacent slot, the surface of the sliding sleeve is threadedly connected with a threaded locating pin plugged into the adjacent slot, when the staff adjusts the height of the internal threaded tube, the staff can judge whether the slot is aligned with the threaded locating pin by feeling the frustration of the insert ring entering and exiting the slot, without the need to perform blind insertion operations based on experience, which effectively reduces the positioning difficulty of the staff and facilitates the staff to adjust the height of the internal threaded tube.

[0009] Preferably, a groove is provided on the inner side of the sliding sleeve, and a guide bar connected to the slot is fixedly connected to the surface of the internal threaded tube. The guide bar is slidably connected to the inner side of the groove, which can prevent the internal threaded tube from rotating during lifting and lowering, thereby improving the success rate of the connection between the slot and the threaded locating pin.

[0010] Preferably, an annular groove connected to the groove is provided inside the sliding sleeve, and the metal spring and the plug ring are both arranged inside the annular groove, which can reserve sufficient movable space for the metal spring and the plug ring to ensure that the plug ring can move normally.

[0011] Preferably, the threaded locating pin is arranged on the inner side of the annular groove, which enables the insert ring and the threaded locating pin to be connected to the same slot at the same time, further improving the success rate of the connection between the slot and the threaded locating pin.

[0012] Preferably, the maximum cross-sectional diameter of the opening of the ring groove is smaller than the maximum cross-sectional diameter of the insert ring, and the portion of the insert ring with the maximum cross-sectional diameter is always arranged inside the ring groove, which can prevent the insert ring from completely falling out of the ring groove, thereby achieving a good fragrance effect.

[0013] Preferably, the cross-sectional shape of the connecting part between the plug ring, the slot and the plug ring is an arc shape, and the center point of the cross-sectional shape of the connecting part between the plug ring, the slot and the plug ring is always arranged outside the slot, which can reduce the probability of the plug ring and the slot being stuck together, so as to ensure that the plug ring can enter and exit the slot normally.

[0014] Preferably, one end of the threaded positioning pin is fixedly connected to an adjustment ring, and the surface of the adjustment ring is smooth, which makes it easier for the staff to adjust the threaded positioning pin, thereby facilitating the staff to perform adjustment operations.

[0015] The beneficial effects of the utility model are:

[0016] When the staff is adjusting the height of the internal threaded pipe, they can judge whether the slot is aligned with the threaded locating pin by feeling the frustration of the insert ring entering and exiting the slot, without having to rely on experience for blind insertion operations. This effectively reduces the staff's positioning difficulty and facilitates the staff to adjust the height of the internal threaded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the lifting device in the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the lifting device in the utility model;

[0020] Figure 4 It is an exploded schematic diagram of the partial interception mechanism of the lifting device in the utility model.

[0021] In the figure: 1. mounting frame; 2. sliding frame; 3. micrometer; 4. spring telescopic rod; 5. pressure plate; 6. lifting device; 61. sliding sleeve; 611. groove; 612. ring groove; 62. internal threaded tube; 621. slot; 63. threaded adjustment rod; 64. metal spring; 65. insert ring; 66. threaded positioning pin; 67. guide strip; 68. adjustment ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] When implementing: Figure 1-4 As shown, a concrete shrinkage performance detection device comprises: a mounting frame 1, a sliding frame 2 is slidably connected to the inner side of the mounting frame 1, a micrometer 3 and a spring telescopic rod 4 are fixedly connected to the inner side of the slide frame 2, a pressing plate 5 is fixedly connected to the bottom of the spring telescopic rod 4; a lifting device 6, the lifting device 6 is fixedly connected to the top of the mounting frame 1, and the bottom of the lifting device 6 is rotatably connected to the slide frame 2.

[0024] like Figure 2 , Figure 3 and Figure 4As shown, the lifting device 6 includes a sliding sleeve 61 fixedly connected to the top of the mounting frame 1, an internal threaded tube 62 is slidably connected to the inner side of the sliding sleeve 61, and a threaded adjustment rod 63 rotatably connected to the sliding frame 2 is threadedly connected to the inner side of the internal threaded tube 62. The surface of the internal threaded tube 62 is provided with evenly distributed slots 621. A metal spring 64 is arranged on the inner side of the sliding sleeve 61. The metal spring 64 is always in a compressed state. One end of the metal spring 64 is fixedly connected to an insert ring 65 fixedly connected to an adjacent slot 621. A threaded positioning pin 66 plugged into the adjacent slot 621 is threadedly connected to the surface of the sliding sleeve 61; a groove 611 is provided on the inner side of the sliding sleeve 61, and a guide bar 67 connected to the slot 621 is fixedly connected to the surface of the internal threaded tube 62. The guide strip 67 is slidably connected to the inner side of the groove 611; an annular groove 612 connected to the groove 611 is provided inside the sliding sleeve 61, and the metal spring 64 and the plug ring 65 are both arranged inside the annular groove 612; the threaded positioning pin 66 is arranged on the inner side of the annular groove 612; the maximum cross-sectional diameter of the opening of the annular groove 612 is smaller than the maximum cross-sectional diameter of the plug ring 65, and the part with the maximum cross-sectional diameter of the plug ring 65 is always arranged inside the annular groove 612; the cross-sectional shape of the connecting part of the plug ring 65 and the slot 621 and the plug ring 65 is an arc shape, and the cross-sectional center point of the connecting part of the plug ring 65 and the slot 621 and the plug ring 65 is always arranged outside the slot 621; one end of the threaded positioning pin 66 is fixedly connected to an adjusting ring 68, and the surface of the adjusting ring 68 is smooth.

[0025] When the staff uses the device to conduct a concrete shrinkage experiment, they first place the concrete block to be tested on the inner side of the placement plate mounting frame 1, then unlock and lift the internal threaded tube 62, so that the pressure plate 5 and the detection heads of the micrometer 3 overlap the upper surface of the concrete block to be tested, then lock the internal threaded tube 62 and slowly turn the threaded adjustment rod 63, the threaded adjustment rod 63 drives the micrometer 3 and the spring telescopic rod 4 to slowly move downward through the sliding frame 2, the spring telescopic rod 4 drives the pressure plate 5 to press the concrete block downward, the detection head of the micrometer 3 is forced to shrink, the pointer in the micrometer 3 rotates one circle, and then the micrometer 3 is zeroed, when the concrete block to be tested expands and contracts, the detection head of the micrometer 3 can shrink and extend, and the staff can obtain the actual shrinkage and expansion data of the concrete by observing the micrometer 3;

[0026] When the staff needs to unlock the internal threaded tube 62, the staff only needs to unscrew the threaded positioning pin 66. At this time, the internal lock of the slot 621 is lost, and the staff can lift the internal threaded tube 62. During the lifting process of the internal threaded tube 62, the internal threaded tube 62 simultaneously drives the slot 621 to rise and fall. In the process of the slot 621 squeezing the plug ring 65 to the outside, the metal spring 64 always applies a thrust toward the slot 621 to the plug ring 65. At this time, the resistance of the staff to move the threaded positioning pin 66 will gradually increase. When the slot 621 is just aligned with the plug ring 65, the metal spring 64 will gradually increase. 64 can quickly press the insert ring 65 into the slot 621. At this time, the resistance to the movement of the internal threaded tube 62 suddenly increases, indicating that the slot 621 is aligned with the threaded locating pin 66. Then the staff can screw the threaded locating pin 66 into the slot 621 to lock the internal threaded tube 62 at this height. The staff can judge whether the slot 621 is aligned with the threaded locating pin 66 by feeling the frustration generated when the internal threaded tube 62 moves. There is no need to rely on experience for blind insertion operations, which effectively reduces the positioning difficulty of the staff and facilitates the staff to adjust the height of the internal threaded tube 62.

[0027] It should be noted that the micrometer 3 and the spring telescopic rod 4 in the above description are both relatively mature devices in the existing technology. The specific models can be selected according to actual needs. At the same time, the micrometer 3 and the spring telescopic rod 4 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A concrete shrinkage performance detection device, characterized in that: include: A mounting frame (1), wherein a sliding frame (2) is slidably connected to the inner side of the mounting frame (1), a dial gauge (3) and a spring telescopic rod (4) are fixedly connected to the inner side of the sliding frame (2), and a pressing plate (5) is fixedly connected to the bottom of the spring telescopic rod (4); A lifting device (6), wherein the lifting device (6) is fixedly connected to the top of the mounting frame (1), and the bottom of the lifting device (6) is rotatably connected to the sliding frame (2); The lifting device (6) comprises a sliding sleeve (61) fixedly connected to the top of the mounting frame (1); the inner side of the sliding sleeve (61) is slidably connected to an internal threaded tube (62); the inner side of the internal threaded tube (62) is threadedly connected to a threaded adjustment rod (63) rotatably connected to the sliding frame (2); the surface of the internal threaded tube (62) is provided with evenly distributed slots (621); the inner side of the sliding sleeve (61) is provided with a metal spring (64); the metal spring (64) is always in a compressed state; one end of the metal spring (64) is fixedly connected to an insert ring (65) fixedly connected to an adjacent slot (621); the surface of the sliding sleeve (61) is threadedly connected to a threaded positioning pin (66) plugged into the adjacent slot (621).

2. A concrete shrinkage performance detection device according to claim 1, characterized in that: A groove (611) is provided on the inner side of the sliding sleeve (61), and a guide bar (67) communicating with the slot (621) is fixedly connected to the surface of the internal threaded tube (62), and the guide bar (67) is slidably connected to the inner side of the groove (611).

3. A concrete shrinkage performance detection device according to claim 2, characterized in that: The interior of the sliding sleeve (61) is provided with an annular groove (612) which is in communication with the groove (611), and the metal spring (64) and the insert ring (65) are both arranged inside the annular groove (612).

4. A concrete shrinkage performance detection device according to claim 3, characterized in that: The threaded positioning pin (66) is arranged on the inner side of the annular groove (612).

5. A concrete shrinkage performance detection device according to claim 3, characterized in that: The maximum cross-sectional diameter of the opening of the annular groove (612) is smaller than the maximum cross-sectional diameter of the insert ring (65), and the portion of the maximum cross-sectional diameter of the insert ring (65) is always arranged inside the annular groove (612).

6. A concrete shrinkage performance detection device according to claim 3, characterized in that: The cross-sectional shape of the connection portion between the insert ring (65) and the slot (621) and the insert ring (65) is an arc shape, and the center point of the cross-sectional circle of the connection portion between the insert ring (65) and the slot (621) and the insert ring (65) is always arranged outside the slot (621).

7. A concrete shrinkage performance detection device according to claim 1, characterized in that: One end of the threaded positioning pin (66) is fixedly connected to an adjustment ring (68), and the surface of the adjustment ring (68) is smooth.

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