Device for detecting low temperature resistance of concrete

Abstract

The utility model relates to the technical field of concrete detection, and discloses a concrete low temperature resistance detection device which comprises a low temperature detection box and a fixing frame, a motor is arranged at the bottom of the right side of the fixing frame, and a two-way screw is rotationally connected to the middle of the bottom end of the inner side of the fixing frame. First moving blocks are in threaded connection with the left end and the right end of the outer side of the two-way screw rod, fixing plates are fixedly connected to the upper ends of the first moving blocks, connecting rods are fixedly connected to the inner sides of the fixing plates, and sliding sleeves and supporting seats are slidably connected to the front sides and the rear sides of the connecting rods. According to the prefabricated concrete carrying device, the motor drives the two-way screw rod to rotate, so that the supporting seat moves, and then the sliding sleeve slides back and forth on the outer side of the connecting rod, so that the four corners of the bottom of prefabricated concrete are carried on the supporting seat, the prefabricated concrete of different sizes can be conveniently carried, and the bottom of the prefabricated concrete is suspended; and the bearing capacity is prevented from being increased due to overlarge bottom supporting area of the precast concrete.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete detection, in particular to a device for detecting the low temperature resistance of concrete. Background Art

[0002] Concrete testing is the testing of the properties of concrete, and is mainly used for precast concrete testing. When precast concrete is produced into precast concrete products, in order to ensure the precast strength and quality, the structural strength of precast concrete is tested. Most of the existing precast concrete mainly tests the degree of compression, stress strength, low temperature resistance, wear resistance, water resistance and permeability of concrete.

[0003] When testing the low-temperature resistance of most existing precast concrete, the precast concrete is mainly made into blocks of different sizes and placed in a low-temperature testing box. The temperature inside the box is adjusted by the low-temperature testing box, and then counterweights of different weights are placed on the top of the precast concrete blocks to test the strength of different stresses on the top of the precast concrete blocks under different low-temperature environments. However, most of the existing precast concrete blocks for testing are directly placed inside the low-temperature testing box. The contact area of the bottom of the precast concrete blocks is too large, which leads to increased supporting force and reduced accuracy of the test data. It is necessary to design a concrete low-temperature resistance testing device to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a device for detecting the low temperature resistance of concrete.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A device for detecting the low-temperature resistance of concrete, comprising a low-temperature detection box, wherein a fixing frame is fixedly connected to the inner side of the low-temperature detection box, a motor is provided at the right bottom of the fixing frame, a bidirectional screw is rotatably connected to the middle part of the inner bottom end of the fixing frame, a rotating shaft of the motor is fixedly connected to the right end of the bidirectional screw, a first moving block is threadedly connected to the left and right ends of the outer side of the bidirectional screw, an upper end of the first moving block is fixedly connected to a fixing plate, an inner side of the fixing plate is fixedly connected to a connecting rod, a front and rear side of the connecting rod are slidably connected to a sliding sleeve, and an inner side of the sliding sleeve is fixedly connected to a support seat;

[0007] Through the above technical solution, the motor drives the bidirectional screw to rotate, so that the first moving blocks set on the left and right sides move inward, so that the support seat moves, and then the sliding sleeve slides back and forth on the outside of the connecting rod, so that the four corners of the bottom of the precast concrete are mounted on the support seat, which is convenient for mounting and setting precast concrete of different sizes so that the bottom is suspended in the air, and the stress that the precast concrete itself can withstand at different temperatures and different counterweights is detected, thereby avoiding an excessively large support area at the bottom of the precast concrete, which leads to an increase in the bearing capacity and a reduction in the accuracy of the detection data.

[0008] Furthermore, a snap-fit groove is provided on the inner side of each support seat, and a non-slip rubber pad is snap-fitted and fixed on the inner side of each snap-fit groove;

[0009] Through the above technical solution, the stability and anti-slip performance of the precast concrete blocks during placement are increased.

[0010] Furthermore, a connecting column is provided at the middle portion of the outer side of the sliding sleeve, and a locking bolt is threadedly connected to the outer side of the connecting column;

[0011] The above technical solution makes it easy to fix the sliding sleeve on the connecting rod.

[0012] Furthermore, the front and rear sides of the bottom end of the fixed plate are fixedly connected to a second moving block, the front and rear sides of the inner bottom end of the fixed frame are fixedly connected to a guide rod, and the middle part of the second moving block is slidably connected to the left and right ends of the corresponding guide rods respectively;

[0013] Through the above technical solution, the fixed plate can play a guiding role when moving, and at the same time the connection performance of the fixed plate is improved, thereby increasing the stability during the movement.

[0014] Furthermore, the left and right ends of the front side of the low-temperature detection box are both rotatably connected to the first box door, and the left and right sides of the upper end of the fixing frame are both rotatably connected to the second box door;

[0015] The above technical solution facilitates the opening of the front side and the upper part of the low-temperature detection box, enables the placement of precast concrete blocks, and places counterweights on the upper parts of the precast concrete blocks.

[0016] Furthermore, a handle is provided on the front side of the first door and the upper part of the second door;

[0017] The above technical solution facilitates the opening of the first door and the second door.

[0018] Furthermore, a transparent window is provided in the middle of the front side of each of the first doors;

[0019] With the above technical solution, the process of low-temperature performance testing of concrete can be easily observed through the transparent window.

[0020] The utility model has the following beneficial effects:

[0021] In the present invention, the size of the precast concrete is first measured, and the bidirectional screw is driven by a motor to rotate, so that the first moving blocks arranged on the left and right sides move inward, driving the fixed plate, the connecting rod, the sliding sleeve and the support seat to move, and the relative distance between the inner sides of the left and right support seats is moved to the same as the transverse size of the precast concrete, and then the sliding sleeve is slid back and forth on the outside of the connecting rod, so that the relative distance between the middle parts of the front and rear support seats is moved to the same as the longitudinal size of the precast concrete, and the locking bolt is rotated on the inner thread of the connecting column to lock the position of the sliding sleeve on the connecting rod. The precast concrete is placed inside the low-temperature testing box through the second box door, so that the four corners of the bottom of the precast concrete are placed on the anti-slip rubber pad, and finally a counterweight is placed on the upper part of the precast concrete. The internal temperature is lowered by the low-temperature testing box, and the stresses exerted on the precast concrete at different temperatures by placing different counterweights on the upper part of the precast concrete are tested. This makes it easy to carry out the installation of precast concrete of different sizes so that its bottom is suspended in the air, and to test the stresses exerted on the precast concrete itself at different temperatures and with different counterweights, thereby avoiding the situation where the supporting area of the bottom of the precast concrete is too large, resulting in an increase in the bearing capacity and a reduction in the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front side three-dimensional structure of a concrete low-temperature resistance testing device proposed by the present invention, with the first door and the second door in a closed state;

[0023] Figure 2 This is a schematic diagram of the front side three-dimensional structure of a concrete low-temperature resistance testing device proposed by the present invention, with the first door and the second door of the device opened;

[0024] Figure 3 This is a schematic diagram of the internal structure of a low-temperature detection box of a concrete low-temperature resistance detection device proposed in the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixed plate, connecting rod, sliding sleeve and support base of a concrete low-temperature resistance testing device proposed by the utility model;

[0026] Figure 5 This is a schematic diagram of the exploded structure of a sliding sleeve, a support seat and a locking bolt of a concrete low-temperature resistance detection device proposed by the utility model.

[0027] Legend:

[0028] 1. Low-temperature detection chamber; 2. Fixed frame; 3. Motor; 4. Bidirectional screw; 5. First movable block; 6. Fixed plate; 7. Connecting rod; 8. Sliding sleeve; 9. Support seat; 10. Engaging groove; 11. Anti-slip rubber pad; 12. Connecting column; 13. Locking bolt; 14. Second movable block; 15. Guide rod; 16. First chamber door; 17. Transparent window; 18. Second chamber door; 19. Handle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1-5 The utility model provides an embodiment: a device for detecting the low-temperature resistance of concrete, comprising a low-temperature detection box 1, a fixed frame 2 is fixedly connected to the inner side of the low-temperature detection box 1, the right bottom of the fixed frame 2 is arranged on the motor 3, and a bidirectional screw 4 is rotatably connected to the middle part of the inner bottom end of the fixed frame 2, the rotating shaft of the motor 3 is fixedly connected to the right end of the bidirectional screw 4, the left and right ends of the outer side of the bidirectional screw 4 are threadedly connected to the first moving block 5, the upper end of the first moving block 5 is fixedly connected to the fixing plate 6, the inner side of the fixing plate 6 is fixedly connected to the connecting rod 7, the front and rear sides of the connecting rod 7 are slidably connected to the sliding sleeve 8, and the inner side of the sliding sleeve 8 is fixedly connected to the support seat 9.

[0031] The inner side of the support seat 9 is provided with a snap-fit groove 10, and the inner side of the snap-fit groove 10 is snap-fitted with an anti-slip rubber pad 11 to increase the stability and anti-slip performance of the precast concrete blocks during placement. A connecting column 12 is provided in the middle of the outer side of the sliding sleeve 8, and the outer side of the connecting column 12 is threadedly connected with a locking bolt 13 to facilitate fixing the sliding sleeve 8 on the connecting rod 7. The front and rear sides of the bottom end of the fixed plate 6 are fixedly connected to the second moving block 14, and the front and rear sides of the inner bottom end of the fixed frame 2 are fixedly connected to the guide rod 15. The middle of the second moving block 14 is slidably connected to the left and right ends of the corresponding guide rod 15, so that the fixed plate 6 can guide when it moves. At the same time, the connection performance of the fixed plate 6 is increased to increase the stability during movement. The left and right ends of the front side of the low-temperature detection box 1 are rotatably connected to the first box door 16, and the left and right sides of the upper end of the fixed frame 2 are rotatably connected to the second box door 18, which is convenient for opening the front side and the upper part of the low-temperature detection box 1, so that the precast concrete blocks can be placed, and the counterweight blocks can be placed on the upper part of the precast concrete blocks. The front side of the first box door 16 and the upper part of the second box door 18 are both provided with handles 19 to facilitate the opening of the first box door 16 and the second box door 18. A transparent window 17 is provided in the middle of the front side of the first box door 16. Through the transparent window 17, it is convenient to observe the process of the low-temperature performance test of concrete.

[0032] Working principle: First, measure the size of the precast concrete, and use the motor 3 to drive the bidirectional screw 4 to rotate, so that the first moving block 5 set on the left and right sides moves inward, driving the fixed plate 6, connecting rod 7, sliding sleeve 8 and support seat 9 to move, and the relative distance between the inner side of the left and right support seats 9 moves to the same as the horizontal size of the precast concrete, and then the sliding sleeve 8 slides back and forth on the outside of the connecting rod 7, so that the middle relative distance of the front and rear support seats 9 moves to the same as the longitudinal size of the precast concrete, and the locking bolt 13 is rotated on the inner thread of the connecting column 12 to lock the position of the sliding sleeve 8 on the connecting rod 7. Secondly, the precast concrete is placed inside the low-temperature detection box 1 through the second box door 18, so that the four corners of the bottom of the precast concrete are mounted on the anti-slip rubber pad 11, and finally a counterweight is placed on the upper part of the precast concrete, and the internal temperature is lowered by the low-temperature detection box 1, and the stresses subjected to different counterweights placed on the upper part of the precast concrete and at different temperatures are tested.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the low temperature resistance of concrete, comprising a low temperature detection box (1), characterized in that: The inner side of the low-temperature detection box (1) is fixedly connected to a fixing frame (2), a motor (3) is provided at the right bottom of the fixing frame (2), a bidirectional screw (4) is rotatably connected to the middle of the inner bottom end of the fixing frame (2), the rotating shaft of the motor (3) is fixedly connected to the right end of the bidirectional screw (4), the outer left and right ends of the bidirectional screw (4) are both threadedly connected to a first moving block (5), the upper end of the first moving block (5) is fixedly connected to a fixing plate (6), the inner side of the fixing plate (6) is fixedly connected to a connecting rod (7), the front and rear sides of the connecting rod (7) are slidably connected to a sliding sleeve (8), and the inner side of the sliding sleeve (8) is fixedly connected to a support seat (9).

2. The low-temperature resistance detection device for concrete according to claim 1, characterized in that: The inner side of the support seat (9) is provided with a snap-fit groove (10), and the inner side of the snap-fit groove (10) is snap-fitted with a non-slip rubber pad (11).

3. The low-temperature resistance detection device for concrete according to claim 1, characterized in that: A connecting column (12) is provided in the middle of the outer side of the sliding sleeve (8), and a locking bolt (13) is threadedly connected to the outer side of the connecting column (12).

4. The low-temperature resistance testing device for concrete according to claim 1, characterized in that: The front and rear sides of the bottom end of the fixed plate (6) are fixedly connected to a second moving block (14), the front and rear sides of the inner bottom end of the fixed frame (2) are fixedly connected to a guide rod (15), and the middle part of the second moving block (14) is slidably connected to the left and right ends of the corresponding guide rod (15).

5. The low-temperature resistance detection device for concrete according to claim 1, characterized in that: The left and right ends of the front side of the low-temperature detection box (1) are both rotatably connected to the first box door (16), and the left and right sides of the upper end of the fixing frame (2) are both rotatably connected to the second box door (18).

6. The low-temperature resistance testing device for concrete according to claim 5, characterized in that: The front side of the first door (16) and the upper part of the second door (18) are both provided with handles (19).

7. The low-temperature resistance testing device for concrete according to claim 5, characterized in that: A transparent window (17) is provided at the middle portion of the front side of each of the first door (16).

Images