A concrete freeze-thaw resistance detection device

Abstract

The utility model discloses a concrete freeze-thaw resistance detection device, including a detection device body, a screw lifting assembly, a horizontal rotation drive assembly, a detection barrel, a support plate and an inner gear ring, wherein the horizontal rotation drive assembly can drive two detection barrels to exchange positions; two screw lifting assemblies and two support plates are provided, and the two screw lifting assemblies can drive the two support plates to perform opposite movements in the vertical direction. The utility model discloses a concrete freeze-thaw resistance detection device, which can further solve the defect of inconvenient placement of concrete test blocks on the basis of improving detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete detection, in particular to a concrete freeze-thaw resistance detection device. Background Art

[0002] Concrete is widely used in buildings, bridges, roads and other fields. Concrete has abundant raw materials.

[0003] It has the characteristics of low price and simple production process, and a freeze-thaw resistance testing device is needed when testing concrete.

[0004] After the existing freeze-thaw resistance testing device completes the test on the concrete test block, it needs to wait for a period of time until the concrete test block returns to room temperature before replacing the concrete test block. Otherwise, the temperature of the concrete test block or the test environment is likely to cause harm to the operator, and such operation will greatly reduce the efficiency of the test.

[0005] A Chinese patent with authorization announcement number CN217332253U discloses a device for detecting the anti-freezing and thawing ability of a highway pavement: it includes a base plate, a slide groove is provided inside the base plate, a threaded rod is rotatably connected inside the slide groove, a slider threadedly connected to the threaded rod is slidably connected inside the slide groove, a No. 1 motor is installed on one side of the base plate, the output end of the No. 1 motor is connected to the threaded rod, a detection box is fixedly connected to the top of the slider, a partition is fixedly connected to the inside of the detection box, grooves are provided on the tops of the detection box and the partition, a bracket is fixedly connected to the top of the base plate, a cylinder is installed on the inner side of the bracket, a mounting plate is fixedly connected to the output end of the cylinder, and a sealing ring matching the groove is fixedly connected to the bottom of the mounting plate. The above patent can adjust the position of the test box by means of the slider, threaded rod, No. 1 motor and slide. At the same time, the partition divides the test box into two spaces, so that the operator does not need to wait for the tested concrete test block to return to room temperature before testing another untested concrete test block, which greatly saves time and improves work efficiency. However, due to the obstruction of the test box, when placing and removing the concrete test blocks, due to space limitations, there are certain restrictions on operation, which is not convenient enough.

[0006] Therefore, it is necessary to develop a concrete freeze-thaw resistance detection device to address the above defects. Utility Model Content

[0007] The utility model aims to provide a concrete freeze-thaw resistance detection device, which can further solve the defect of inconvenient taking and placing of concrete test blocks on the basis of improving detection efficiency.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] The utility model discloses a concrete freeze-thaw resistance detection device, comprising a detection device body, a screw lifting assembly, a horizontal rotation drive assembly, a detection barrel, a support plate and an inner gear ring.

[0010] The horizontal rotation drive assembly can drive the two detection barrels to exchange positions; wherein the two detection barrels are evenly arranged around a circle with the rotation axis of the horizontal rotation drive assembly as the center; the detection barrel is fixedly connected to the horizontal rotation drive assembly, and the horizontal rotation drive assembly is fixedly connected to the base of the detection device body;

[0011] There are two of the screw lifting assemblies and the support plates, and the two screw lifting assemblies can drive the two support plates to make opposite movements in the vertical direction; wherein, the two support plates are horizontally arranged in the two detection barrels, respectively, and one support plate is higher than the other support plate; the inner gear ring is fixed above the base, and the inner gear ring is coaxial with the rotation axis of the horizontal rotation drive assembly; one of the screw lifting assemblies is provided in each of the two detection barrels, and the two screw lifting assemblies are respectively threadedly connected to the two support plates, the screw lifting assembly is rotatably connected to the bottom wall of the detection barrel, and the screw lifting assembly passes through the bottom wall of the detection barrel and is connected to the inner gear ring through a gear pair.

[0012] Furthermore, the horizontal rotation drive assembly includes a driving motor, a rotating disk and a supporting tube, the supporting tube is vertically arranged, and the supporting tube is fixedly connected to the base; the rotating disk coaxial cover is arranged on the top surface of the supporting tube, and the rotating disk is rotatably connected to the supporting tube; the driving motor is fixedly connected to the bottom surface of the base, and the output shaft of the driving motor passes through the base and is coaxially fixedly connected to the rotating disk; the detection barrel is fixedly connected to the rotating disk.

[0013] Furthermore, a plurality of spherical grooves are evenly distributed on the circumference of the top surface of the support tube, and a ball is arranged in each of the spherical grooves; an annular track groove is coaxially arranged on the bottom surface of the rotating disk, and the ball is in rolling contact with the annular track groove.

[0014] Furthermore, the screw lifting assembly includes a forward screw, a reverse screw and a gear, the forward screw and the reverse screw are evenly distributed on a circle with the central axis of the detection barrel as the center, and the central axes of the two forward screws, the two reverse screws and the two detection barrels are all located in the same vertical plane; the forward screw rotates through the bottom wall of the detection barrel and is fixedly connected to one of the gears, the reverse screw rotates through the bottom wall of the detection barrel and is fixedly connected to another gear, and the two gears are meshed; the gear of the reverse screw of one of the detection barrels is meshed with the inner gear ring, and the gear of the forward screw of the other detection barrel is meshed with the inner gear ring.

[0015] Furthermore, a forward threaded sleeve and a reverse threaded sleeve are vertically fixed to the bottom surface of the support plate, the forward threaded sleeve is threadedly connected to the forward screw, and the reverse threaded sleeve is threadedly connected to the reverse screw; and a through hole for the forward screw and the reverse screw to pass through is opened on the support plate.

[0016] Furthermore, the bottom ends of the forward screw and the reverse screw are both stepped shafts, and the stepped shafts are the first optical axis segment, the second optical axis segment and the third optical axis segment from top to bottom, and the second optical axis segment rotates through the support plate; two first seat bearings are provided on the top surface of the bottom wall of the detection barrel, and the two first seat bearings are respectively interference fit with the first optical axis segments of the two stepped shafts, and the bottom end surfaces of the two inner rings of the first seat bearings abut against the step surface at the top of the second optical axis segment; two second seat bearings are provided on the bottom surface of the bottom wall of the detection barrel, and the two second seat bearings are respectively interference fit with the third optical axis segments of the two stepped shafts, and the top end surfaces of the two inner rings of the second seat bearings abut against the step surface at the bottom of the second optical axis segment.

[0017] Furthermore, the inner gear ring is coaxially fixed in the inner cavity of the support tube.

[0018] Furthermore, the rotating disk is provided with two holes, and the two detection barrels are coaxially fixedly connected to the two holes respectively.

[0019] Compared with the prior art, the beneficial technical effects of the utility model are:

[0020] The utility model discloses a concrete anti-freeze-thaw detection device, in which a concrete test block is placed on a support plate, and when the support plate is raised or lowered, the concrete test block thereon is driven to rise or fall synchronously. When the horizontal rotating drive assembly drives the two detection barrels to exchange positions, a screw lifting assembly drives the corresponding support plate to rise to the top opening of the detection barrel, so as to facilitate the placement of the concrete test block. The other screw lifting assembly drives the corresponding support plate to descend, and after the exchange of positions is completed, the telescopic cylinder drives the hollow plate to descend and seal on the detection barrel, and then the freeze-thaw test of the concrete test block is started. In summary, it is convenient and quick to take and place the concrete test block, and the two detection barrels perform freeze-thaw tests alternately, which improves the detection efficiency.

[0021] Therefore, the utility model can further solve the defect of inconvenient taking and placing concrete test blocks on the basis of improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0025] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the base of the utility model from top view;

[0027] Figure 5 This is a schematic diagram of the structure of the rotating disk of the utility model when viewed from above;

[0028] Figure 6 This is a schematic diagram of the structure of the utility model after the two detection barrels are exchanged.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. test barrel; 2. base; 201. L-shaped bracket plate; 3. support plate; 301. forward threaded sleeve; 302. reverse threaded sleeve; 4. concrete test block; 5. inner gear ring; 6. drive motor; 7. rotating disk; 701. annular track groove; 702. hole; 8. support cylinder; 801. spherical groove; 9. ball; 10. forward screw; 11. reverse screw; 12. gear; 13. first seat bearing; 14. second seat bearing; 15. hot air blower; 16. refrigerator; 17. first valve; 18. second valve; 19. telescopic cylinder; 20. hollow disk; 21. air pump. DETAILED DESCRIPTION

[0030] The core of the utility model is to provide a concrete freeze-thaw resistance detection device, which can further solve the defect of inconvenient removal and placement of concrete test blocks on the basis of improving detection efficiency.

[0031] 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.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] In a specific embodiment of the present invention, Figures 1 to 6 As shown, it includes a detection device body, a screw lifting assembly, a horizontal rotation drive assembly, a detection barrel 1, a support plate 3 and an inner gear ring 5.

[0034] The main body of the detection device belongs to the prior art. The main body of the detection device in this embodiment has the same features as the patent document cited in the background technology, the utility model patent with authorization announcement number CN217332253U, so a brief description is given: the main body of the detection device includes a base 2 and a detection component, and the detection component: an L-shaped bracket plate 201 is provided on the rear side of the base 2, and a hot air blower 15, a refrigerator 16, a first valve 17, a second valve 18, a telescopic cylinder 19, a hollow disk 20 and an air pump 21 are provided on the top surface of the L-shaped bracket plate 201. The air outlet of the hot air blower 15 is connected to the first valve 17, the air outlet of the refrigerator 16 is connected to the second valve 18, and the air outlet of the air pump 21 is connected to the air inlet of the refrigerator 16; the first valve 17 and the second valve 18 are connected through a three-way pipe, and the hollow plate 20 is connected to the three-way pipe through a hose; the telescopic cylinder 19 can be an electric telescopic cylinder, a hydraulic telescopic cylinder or a pneumatic telescopic cylinder, the telescopic end of the telescopic cylinder 19 vertically penetrates the top plate of the L-shaped bracket plate 201 and is fixedly connected to the hollow plate 20, the hollow plate 20 is coaxial with the telescopic end of the telescopic cylinder 19, the hollow plate 20 is horizontally arranged, and a plurality of air outlet holes are opened on the bottom wall of the hollow plate 20.

[0035] Freeze-thaw principle: when the concrete test block 4 is frozen, the first valve 17 is closed, the second valve 18 is opened, cold air enters the three-way pipe, and then enters the hollow plate 20 through the hose, and the cold air enters the detection barrel 1 through the air outlet; when the concrete test block 4 is heated, the first valve 17 is opened, the second valve 18 is closed, hot air enters the three-way pipe, and then enters the hollow plate 20 through the hose, and the hot air enters the detection barrel 1 through the air outlet.

[0036] The horizontal rotation drive assembly can drive the two detection barrels 1 to exchange positions; wherein the two detection barrels 1 are evenly arranged around a circle with the rotation axis of the horizontal rotation drive assembly as the center; the detection barrel 1 is fixedly connected to the horizontal rotation drive assembly, and the horizontal rotation drive assembly is fixedly connected to the base 2 of the detection device body;

[0037] There are two screw lifting assemblies and two support plates 3, and the two screw lifting assemblies can drive the two support plates 3 to make opposite movements in the vertical direction; wherein, the two support plates 3 are horizontally arranged in the two detection barrels 1 respectively, and one support plate 3 is higher than the other support plate 3; the inner gear ring 5 is fixed above the base 2, and the inner gear ring 5 is coaxial with the rotation axis of the horizontal rotation drive assembly; a screw lifting assembly is provided in each of the two detection barrels 1, and the two screw lifting assemblies are respectively connected to the two support plates 3 by threaded transmission, the screw lifting assembly is rotatably connected to the bottom wall of the detection barrel 1, and the screw lifting assembly passes through the bottom wall of the detection barrel 1 and is connected to the inner gear ring 5 through a gear pair.

[0038] Specifically, the concrete test block 4 is placed on the support plate 3, and when the support plate 3 is raised or lowered, the concrete test block 4 thereon is driven to rise or fall synchronously. When the horizontal rotation drive assembly drives the two detection barrels 1 to exchange positions, a screw lifting assembly drives the corresponding support plate 3 to rise to the top opening of the detection barrel 1, so as to facilitate the removal and placement of the concrete test block 4. The other screw lifting assembly drives the corresponding support plate 3 to descend, and after the exchange of positions is completed, the telescopic cylinder 19 drives the hollow plate 20 to descend and seal on this detection barrel 1, and then starts the freeze-thaw test on the concrete test block 4. In summary, it is convenient and quick to take and place the concrete test block 4, and the two detection barrels 1 perform freeze-thaw tests alternately, which improves the detection efficiency.

[0039] The horizontal rotation drive assembly includes a drive motor 6, a rotating disk 7 and a support tube 8. The support tube 8 is vertically arranged and fixedly connected to the base 2. The rotating disk 7 is coaxially covered on the top surface of the support tube 8, and the rotating disk 7 is rotatably connected to the support tube 8. The drive motor 6 is fixedly connected to the bottom surface of the base 2, and the output shaft of the drive motor 6 passes through the base 2 and is coaxially fixedly connected to the rotating disk 7. The detection barrel 1 is fixedly connected to the rotating disk 7. Specifically, the drive motor 6 drives the rotating disk 7 to rotate, and the rotating disk 7 drives the two detection barrels 1 to move, so that the two detection barrels 1 can exchange positions. Figure 3 and Figure 4 Taking the perspective of as an example, when the driving motor 6 rotates forward, the rotating disk 7 rotates counterclockwise, and the positions of the two detection barrels 1 are exchanged. When the driving motor 6 rotates reversely, the rotating disk 7 rotates clockwise, and the two detection barrels 1 return to their original positions.

[0040] A plurality of spherical grooves 801 are evenly distributed on the circumference of the top surface of the support tube 8 , and a ball 9 is arranged in each spherical groove 801 ; an annular track groove 701 is coaxially arranged on the bottom surface of the rotating disk 7 , and the ball 9 is in rolling contact with the annular track groove 701 .

[0041] The screw lifting assembly includes a forward screw 10, a reverse screw 11 and a gear 12. The forward screw 10 and the reverse screw 11 are evenly distributed on a circle with the central axis of the detection barrel 1 as the center. The two forward screws 10, the two reverse screws 11 and the central axes of the two detection barrels 1 are all located in the same vertical plane; the forward screw 10 rotates through the bottom wall of the detection barrel 1 and is fixedly connected to a gear 12, the reverse screw 11 rotates through the bottom wall of the detection barrel 1 and is fixedly connected to another gear 12, and the two gears 12 are meshed; the gear 12 of the reverse screw 11 of one detection barrel 1 is meshed with the inner gear ring 5, and the gear 12 of the forward screw 10 of the other detection barrel 1 is meshed with the inner gear ring 5.

[0042] Specifically, Figure 3 and Figure 4Taking the perspective of as an example, when the driving motor 6 rotates forward, the rotating disk 7 rotates counterclockwise, and the detection barrel 1 rotates counterclockwise with the rotating disk 7, the gear 12 of the reverse screw 11 of the detection barrel 1 on the right side rotates clockwise and drives another gear 12 meshing with it to rotate counterclockwise, then the reverse screw 11 rotates clockwise, and the forward screw 10 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the pallet 3 to move downward; the gear 12 of the forward screw 10 of the detection barrel 1 on the left side rotates clockwise and drives another gear 12 meshing with it to rotate counterclockwise, then the forward screw 10 rotates clockwise, and the reverse screw 11 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the pallet 3 to move upward, and finally Figure 6 The status shown;

[0043] by Figure 6 and Figure 4 Taking the perspective of as an example, when the driving motor 6 is reversed, the rotating disk 7 rotates clockwise, and the detection barrel 1 rotates counterclockwise with the rotating disk 7, the gear 12 of the forward screw 10 of the detection barrel 1 on the right side rotates counterclockwise and drives another gear 12 meshing with it to rotate clockwise, then the reverse screw 11 rotates clockwise, and the forward screw 10 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the support plate 3 to move downward; the gear 12 of the reverse screw 11 of the detection barrel 1 on the left side rotates counterclockwise and drives another gear 12 meshing with it to rotate clockwise, then the forward screw 10 rotates clockwise, and the reverse screw 11 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the support plate 3 to move upward, and finally Figure 3 Status shown.

[0044] A forward threaded sleeve 301 and a reverse threaded sleeve 302 are vertically fixed to the bottom surface of the support plate 3. The forward threaded sleeve 301 is threadedly connected to the forward screw 10, and the reverse threaded sleeve 302 is threadedly connected to the reverse screw 11. A through hole for the forward screw 10 and the reverse screw 11 to pass through is provided on the support plate 3. A plurality of through holes are vertically provided on the support plate 3, and the through holes facilitate the contact between hot air or cold air and the bottom surface of the concrete test block 4.

[0045] The bottom ends of the forward screw 10 and the reverse screw 11 are both stepped shafts, and the stepped shafts are the first optical axis section, the second optical axis section and the third optical axis section from top to bottom, and the second optical axis section rotates through the support plate 3; the top surface of the bottom wall of the detection barrel 1 is provided with two first seat bearings 13, and the two first seat bearings 13 are respectively interference fit with the first optical axis sections of the two stepped shafts, and the bottom end surfaces of the inner rings of the two first seat bearings 13 abut against the stepped surface at the top of the second optical axis section; the bottom surface of the bottom wall of the detection barrel 1 is provided with two second seat bearings 14, and the two second seat bearings 14 are respectively interference fit with the third optical axis sections of the two stepped shafts, and the top end surfaces of the inner rings of the two second seat bearings 14 abut against the stepped surface at the bottom of the second optical axis section. Specifically, studs are fixed on the top and bottom surfaces of the bottom wall of the detection barrel 1, and the first seat bearings 13 and the second seat bearings 14 are fixedly connected to the bottom wall through the cooperation of the stud nuts.

[0046] The inner gear ring 5 is coaxially fixed in the inner cavity of the support tube 8 .

[0047] Two holes 702 are formed on the rotating disk 7 , and the two detection barrels 1 are coaxially fixedly connected to the two holes 702 .

[0048] The working principle of the concrete freeze-thaw resistance detection device of the utility model is as follows: the concrete test block 4 is placed on the support plate 3, and the concrete test block 4 on it is driven to rise and fall synchronously when the support plate 3 is raised or lowered. When the horizontal rotation drive assembly drives the two detection barrels 1 to exchange positions, a screw lifting assembly drives the corresponding support plate 3 to rise to the top opening of the detection barrel 1, so as to facilitate the placement of the concrete test block 4. The other screw lifting assembly drives the corresponding support plate 3 to descend, and after the exchange of positions is completed, the telescopic cylinder 19 drives the hollow plate 20 to descend and seal on this detection barrel 1, and then the freeze-thaw detection of the concrete test block 4 begins.

[0049] The driving motor 6 drives the rotating disk 7 to rotate, and the rotating disk 7 drives the two detection barrels 1 to move, so that the two detection barrels 1 can exchange positions; Figure 3 and Figure 4 Taking the perspective of as an example, when the driving motor 6 rotates forward, the rotating disk 7 rotates counterclockwise, and the positions of the two detection barrels 1 are exchanged. When the driving motor 6 rotates reversely, the rotating disk 7 rotates clockwise, and the two detection barrels 1 return to their original positions.

[0050] by Figure 3 and Figure 4Taking the perspective of as an example, when the driving motor 6 rotates forward, the rotating disk 7 rotates counterclockwise, and the detection barrel 1 rotates counterclockwise with the rotating disk 7, the gear 12 of the reverse screw 11 of the detection barrel 1 on the right side rotates clockwise and drives another gear 12 meshing with it to rotate counterclockwise, then the reverse screw 11 rotates clockwise, and the forward screw 10 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the pallet 3 to move downward; the gear 12 of the forward screw 10 of the detection barrel 1 on the left side rotates clockwise and drives another gear 12 meshing with it to rotate counterclockwise, then the forward screw 10 rotates clockwise, and the reverse screw 11 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the pallet 3 to move upward, and finally Figure 6 The status shown;

[0051] by Figure 6 and Figure 4 Taking the perspective of as an example, when the driving motor 6 is reversed, the rotating disk 7 rotates clockwise, and the detection barrel 1 rotates counterclockwise with the rotating disk 7, the gear 12 of the forward screw 10 of the detection barrel 1 on the right side rotates counterclockwise and drives another gear 12 meshing with it to rotate clockwise, then the reverse screw 11 rotates clockwise, and the forward screw 10 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the support plate 3 to move downward; the gear 12 of the reverse screw 11 of the detection barrel 1 on the left side rotates counterclockwise and drives another gear 12 meshing with it to rotate clockwise, then the forward screw 10 rotates clockwise, and the reverse screw 11 rotates counterclockwise, so that the reverse screw 11 and the forward screw 10 simultaneously drive the support plate 3 to move upward, and finally Figure 3 Status shown.

[0052] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0053] The above embodiments are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A concrete freeze-thaw resistance detection device, comprising a detection device body, characterized in that: It also includes a screw lifting assembly, a horizontal rotation drive assembly, a detection barrel (1), a support plate (3) and an inner gear ring (5). The horizontal rotation drive assembly is capable of driving the two detection barrels (1) to exchange positions; wherein the two detection barrels (1) are evenly arranged around a circle with the rotation axis of the horizontal rotation drive assembly as the center; the detection barrel (1) is fixedly connected to the horizontal rotation drive assembly, and the horizontal rotation drive assembly is fixedly connected to the base (2) of the detection device body; The screw lifting assembly and the support plate (3) are each provided with two, and the two screw lifting assemblies can drive the two support plates (3) to perform opposite movements in the vertical direction; wherein the two support plates (3) are respectively arranged horizontally in the two detection barrels (1), and one of the support plates (3) is higher than the other support plate (3); the inner gear ring (5) is fixed above the base (2), and the inner gear ring (5) is coaxial with the rotation axis of the horizontal rotation drive assembly; the two detection barrels (1) are each provided with a screw lifting assembly, and the two screw lifting assemblies are respectively connected to the two support plates (3) by threaded transmission, and the screw lifting assembly is rotationally connected to the bottom wall of the detection barrel (1), and the screw lifting assembly passes through the bottom wall of the detection barrel (1) and is connected to the inner gear ring (5) through a gear pair.

2. The concrete freeze-thaw resistance detection device according to claim 1 is characterized in that: The horizontal rotation drive assembly comprises a drive motor (6), a rotating disk (7) and a support tube (8); the support tube (8) is vertically arranged and fixedly connected to the base (2); the rotating disk (7) is coaxially covered on the top surface of the support tube (8), and the rotating disk (7) is rotatably connected to the support tube (8); the drive motor (6) is fixedly connected to the bottom surface of the base (2), and the output shaft of the drive motor (6) passes through the base (2) and is coaxially fixedly connected to the rotating disk (7); the detection barrel (1) is fixedly connected to the rotating disk (7).

3. The concrete freeze-thaw resistance detection device according to claim 2 is characterized in that: The top surface of the support tube (8) is evenly distributed with a plurality of spherical grooves (801) on its circumference, and a ball (9) is arranged in each of the spherical grooves (801); the bottom surface of the rotating disk (7) is coaxially provided with an annular track groove (701), and the ball (9) is in rolling contact with the annular track groove (701).

4. The concrete freeze-thaw resistance detection device according to claim 1, characterized in that: The screw lifting assembly comprises a forward screw (10), a reverse screw (11) and a gear (12); the forward screw (10) and the reverse screw (11) are evenly arranged on a circle with the central axis of the detection barrel (1) as the center; the central axes of the two forward screws (10), the two reverse screws (11) and the two detection barrels (1) are all located in the same vertical plane; the forward screw (10) rotates through the bottom wall of the detection barrel (1) and is fixedly connected to one of the gears (12); the reverse screw (11) rotates through the bottom wall of the detection barrel (1) and is fixedly connected to another of the gears (12); the two gears (12) are meshed; the gear (12) of the reverse screw (11) of one of the detection barrels (1) is meshed with the inner gear ring (5), and the gear (12) of the forward screw (10) of the other detection barrel (1) is meshed with the inner gear ring (5).

5. The concrete freeze-thaw resistance detection device according to claim 4 is characterized in that: A forward threaded sleeve (301) and a reverse threaded sleeve (302) are vertically fixed to the bottom surface of the support plate (3); the forward threaded sleeve (301) is threadedly connected to the forward screw rod (10), and the reverse threaded sleeve (302) is threadedly connected to the reverse screw rod (11); and a through hole for the forward screw rod (10) and the reverse screw rod (11) to pass through is provided on the support plate (3).

6. The concrete freeze-thaw resistance detection device according to claim 4, characterized in that: The bottom ends of the forward screw (10) and the reverse screw (11) are both stepped shafts, and the stepped shafts are respectively the first optical axis section, the second optical axis section and the third optical axis section from top to bottom, and the second optical axis section rotates through the support plate (3); the top surface of the bottom wall of the detection barrel (1) is provided with two first seat bearings (13), and the two first seat bearings (13) are respectively interference fit with the first optical axis sections of the two stepped shafts, and the bottom end surfaces of the inner rings of the two first seat bearings (13) are in contact with the step surface at the top of the second optical axis section; the bottom surface of the bottom wall of the detection barrel (1) is provided with two second seat bearings (14), and the two second seat bearings (14) are respectively interference fit with the third optical axis sections of the two stepped shafts, and the top end surfaces of the inner rings of the two second seat bearings (14) are in contact with the step surface at the bottom of the second optical axis section.

7. The concrete freeze-thaw resistance detection device according to claim 2, characterized in that: The inner gear ring (5) is coaxially fixed in the inner cavity of the support tube (8).

8. The concrete freeze-thaw resistance detection device according to claim 2, characterized in that: The rotating disk (7) is provided with two holes (702), and the two detection barrels (1) are coaxially fixedly connected to the two holes (702) respectively.

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