Pressure test device for ultra-high performance concrete processing

Abstract

The utility model discloses a pressure testing device for ultra-high performance concrete processing, which relates to the technical field of concrete pressure testing and comprises a base, a top seat, a pressure bearing table, an upper pressure head and a hydraulic driver. According to the utility model, four groups of cameras are arranged on the lower wall of the circular base plate, four surfaces of a concrete block can be simultaneously shot and recorded, the integrity of test records is ensured, the shooting height of the cameras can be adjusted through the driving of an extending shaft of the air cylinder, and the shooting pitch angle of the cameras can be adjusted through the driving of an extending shaft of the electric telescopic rod. The height and the angle are very convenient to adjust, the requirement for pressure test recording is fully met, the hard high-transparency acrylic plate is arranged between the camera and the upper pressure head for protection, the hard high-transparency acrylic plate has good impact resistance and light transmission close to glass, recording of the camera is not affected, and the pressure test recording effect is good. And the effect of protecting the camera from being sputtered and damaged by fragments can be achieved, and the use safety of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pressure testing, in particular to a pressure testing device used for ultra-high performance concrete processing. Background Art

[0002] UHPC (Ultra-High Performance Concrete) is ultra-high performance concrete, which has the characteristics of strong durability, good workability, high tensile and compressive strength. At present, beams, plates, columns and other components made of UHPC are widely used in various buildings and structures, such as bridges, wind power towers, ports, docks and other fields. In order to ensure the reliable application of UHPC materials, it is very important to accurately measure the compressive performance of UHPC components. At present, in the process of experimental research on concrete, a hydraulic material testing machine is usually used to determine the uniaxial compressive constitutive relationship of ultra-high performance concrete. For example, a device for determining the uniaxial compressive constitutive relationship of ultra-high performance concrete proposed in the existing public technology involves the field of structural engineering experiments, including a rigid bracket, which includes an upper pressure plate, a lower pressure plate and a plurality of screws arranged in parallel and opposite to each other; an axial compression specimen, which is located between the upper pressure plate and the lower pressure plate, and the axis of the axial compression specimen coincides with the center of the regular polygonal hole; a measuring device, which includes a pressure ring, a measuring frame, a plurality of extensometers and a plurality of strain gauges; the pressure ring is installed between the axial compression specimen and the upper pressure plate, the upper surface of the pressure ring and the upper surface of the nut are in the same horizontal plane, and the axis of the pressure ring coincides with the axial compression specimen; a plurality of extensometers are evenly fixed on the four sides of the axial compression specimen by the measuring frame; and the strain gauge is bonded to the middle of the screw. This public technology can slow down the destruction speed of the specimen when the axial compression specimen reaches the limit stress and begins to decline, and collect data on the descending section of the stress-strain curve;

[0003] However, in the above-mentioned public technology, although the stress-strain curve is collected, the fracturing process of the concrete specimen block can only rely on manual detection. In order to solve this problem, there is a public technology that proposes a concrete specimen pressure testing machine based on video monitoring, which includes a press base, the top of the press base is supported and installed with a top seat through a plurality of guide columns, a press screw is installed on the top seat through a nut seat, and a pressure plate is supported and installed on the bottom end of the press screw through a connecting seat; a monitoring device for monitoring the specimen pressure test is arranged on the side of the pressure base; the monitoring device includes a fixed disc, a vertical support rod is fixed to the top of the fixed disc, a rectangular trough box is supported and installed on the top of the vertical support rod through a connecting seat, a cross bar is installed inside the rectangular trough box, a video monitoring box is fixedly installed on the cross bar, and a camera is installed on the side wall of the video monitoring box. This testing machine can be used for pressure testing of concrete test blocks. The disclosed technology can fully record the crushing process of concrete test blocks through the camera it sets. Although multiple mounting holes are set on the crossbar and it is claimed that the best shooting position can be selected as needed, the acquisition range of the single camera it sets is very limited. When the block test block is not crushed, it is not possible to accurately determine which side will break first, and it is also impossible to confirm the so-called best shooting position. The crushing phenomenon on the unphotographed surface of the block test block is not recorded. This defect makes the disclosed technology incomplete. In addition, during the pressure test of ultra-high performance concrete, the pressure value of the hydraulic drive is much larger than that of ordinary concrete pressure test. This leads to the phenomenon that when the ultra-high performance concrete blocks are crushed, it is very likely that fragments will burst out, and the above-mentioned disclosed technology does not provide protection for this harmful phenomenon. Therefore, it is necessary to improve and optimize the structure of the pressure testing device used for ultra-high performance concrete processing. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a pressure testing device for ultra-high performance concrete processing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pressure testing device for ultra-high performance concrete processing, comprising a base, a top seat, a pressure platform, an upper pressure head and a hydraulic driver, wherein the top seat is fixedly connected to the upper wall of the base through four groups of columns, the pressure platform is fixedly connected to the upper wall of the base and is located in the center, the hydraulic driver is fixedly connected to the upper wall of the top seat, the hydraulic driver extension shaft penetrates the inner wall of the top seat and extends to the lower side of the top seat, the upper pressure head is fixedly connected to the end of the hydraulic driver extension shaft, the lower wall of the top seat is fixedly connected with a baffle, the lower wall of the top seat is slidably connected with a circular base plate through a guide structure, the circular base plate is sleeved on the outer side of the upper pressure head, and the circular base plate is sleeved on the outer side of the upper pressure head. A lifting drive structure for driving the circular ring substrate to rise and fall is arranged between the plate and the top seat, four groups of rotating seats are fixedly connected to the lower wall of the circular ring substrate, and the four groups of rotating seats are equally distributed in a circle with the center of the circular ring substrate as the center, a rotating block is rotatably connected to the inner wall of the rotating seat, and a collecting structure for collecting test information is arranged on the side of the rotating block facing the upper pressure head, and an adjustment structure for adjusting the pitch angle of the rotating block to adjust the collecting direction of the collecting structure is arranged between the end of the rotating block away from the upper pressure head and the lower wall of the circular ring substrate, a protective baffle for protecting the collecting structure is clamped between the circular ring substrate and the rotating seat through a clamping structure, and the protective baffle is located between the collecting structure and the upper pressure head in a top-down projection.

[0006] As a further description of the above technical solution:

[0007] The guide structure includes two groups of guide posts, which are fixedly connected to the upper wall of the circular ring substrate and are respectively located on the left and right sides of the upper pressure head. The ends of the two groups of guide posts away from the circular ring substrate penetrate the inner wall of the top seat and are slidably connected thereto.

[0008] As a further description of the above technical solution:

[0009] The lifting drive structure includes two groups of cylinders, both of which are fixedly connected to the upper wall of the top seat and are respectively located on the front and rear sides of the hydraulic driver. The extension shafts of the two groups of cylinders penetrate the inner wall of the top seat and extend to the lower side of the top seat. The ends of the extension shafts of the two groups of cylinders are fixedly connected to the upper wall of the circular ring base plate.

[0010] As a further description of the above technical solution:

[0011] The acquisition structure is a camera, and the camera is fixedly connected to a side of the rotating block facing the upper pressure head.

[0012] As a further description of the above technical solution:

[0013] The adjustment structure is an electric telescopic rod, which is rotatably connected between the lower wall of the circular ring base plate and an end of the rotating block away from the collection structure.

[0014] As a further description of the above technical solution:

[0015] The clamping structure includes two groups of clamping seats and clamping strips. The two groups of clamping strips are fixedly connected to one end of the protective baffle plate facing the rotating seat and are respectively close to the upper and lower ends of the protective baffle plate. The two groups of clamping seats are respectively fixedly connected to one end of the rotating seat away from the circular ring substrate and the lower wall of the circular ring substrate and are located on the side of the rotating seat facing the upper pressure head. The ends of the two groups of clamping strips away from the protective baffle plate are respectively clamped with the inner side walls of the two groups of clamping seats. The inner side walls of the two groups of clamping seats are both provided with rubber layers. The protective baffle plate is clamped with the two groups of clamping seats through the two groups of clamping strips. The friction between the clamping strips and the clamping seat is increased by the rubber layer.

[0016] As a further description of the above technical solution:

[0017] The protective baffle is a hard and highly transparent acrylic plate.

[0018] The utility model has the following beneficial effects:

[0019] 1. Compared with the prior art, the pressure testing device for ultra-high performance concrete processing has four groups of cameras arranged on the lower wall of the circular base plate, which can simultaneously shoot and record the four sides of the concrete block, ensuring the integrity of the test record. The shooting height of the camera can be adjusted by the extension shaft of the cylinder, and the shooting pitch angle of the camera can be adjusted by the extension shaft of the electric telescopic rod. The height and angle adjustment are very convenient, which fully meets the needs of pressure test records.

[0020] 2. Compared with the existing technology, the pressure testing device for ultra-high performance concrete processing is equipped with a hard and highly transparent acrylic plate between the camera and the upper pressure head as protection. The hard and highly transparent acrylic plate has good impact resistance and light transmittance close to that of glass. It does not affect the camera recording, but also protects the camera from being damaged by splashing fragments, effectively improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a pressure testing device for ultra-high performance concrete processing proposed by the utility model;

[0022] Figure 2 A partial cross-sectional view of a top seat, a hydraulic driver, a guide column, a circular ring base plate, a connecting seat and a connecting structure of an enclosure of a pressure test device for ultra-high performance concrete processing proposed by the utility model;

[0023] Figure 3 A pressure test device for ultra-high performance concrete processing proposed by the utility model Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 This is a schematic diagram of a rotating seat, a rotating block, a clamping seat and a camera connection structure of a pressure test device for ultra-high performance concrete processing proposed by the utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure of a protective baffle and two sets of clamping strips of a pressure testing device for ultra-high performance concrete processing proposed by the utility model.

[0026] Legend:

[0027] 1. Base; 2. Top seat; 3. Column; 4. Enclosure; 5. Pressure platform; 6. Upper pressure head; 7. Hydraulic drive; 8. Cylinder; 9. Guide column; 10. Ring base plate; 11. Rotating seat; 12. Rotating block; 13. Electric telescopic rod; 14. Camera; 15. Snap-in seat; 1501, rubber layer; 16. Snap-in strip; 17. Protective baffle. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference Figures 1 to 5 The utility model provides a pressure testing device for ultra-high performance concrete processing: it includes a base 1, a top seat 2, a pressure platform 5, an upper pressure head 6 and a hydraulic driver 7. The top seat 2 is fixedly connected to the upper wall of the base 1 through four groups of columns 3, the pressure platform 5 is fixedly connected to the upper wall of the base 1 and is located in the center, the hydraulic driver 7 is fixedly connected to the upper wall of the top seat 2, the hydraulic driver 7 extends a shaft that passes through the inner wall of the top seat 2 and extends to the lower side of the top seat 2, and the upper pressure head 6 is fixedly connected to the end of the extended shaft of the hydraulic driver 7. In this embodiment, the use principle of the pressure platform 5, the upper pressure head 6 and the hydraulic driver 7 is consistent with the principle of the hydraulic pressure testing machine in the prior art. By placing the ultra-high performance concrete test block on the upper wall of the pressure platform 5, and then driving the upper pressure head 6 downward by the hydraulic driver 7, the ultra-high performance concrete test block is pressurized. In this embodiment, the pressure platform 5 and the upper pressure head 6 also include a pressure sensor for collecting pressure data.

[0030] In order to facilitate the placement and cleaning of blocks, the lower wall of the top seat 2 is fixedly connected with a baffle 4. When placing blocks and cleaning block fragments, the annular base plate 10 is driven by the cylinder 8 to retract into the baffle 4 without affecting the placement and cleaning operations;

[0031] In order to maintain the stability of the circular ring substrate 10 when it is lifted or lowered, the lower wall of the top seat 2 is slidably connected to the circular ring substrate 10 through a guide structure. The guide structure includes two groups of guide columns 9. The two groups of guide columns 9 are fixedly connected to the upper wall of the circular ring substrate 10 and are respectively located on the left and right sides of the upper pressure head 6. The ends of the two groups of guide columns 9 away from the circular ring substrate 10 penetrate the inner wall of the top seat 2 and are slidably connected thereto. The two groups of guide columns 9 can effectively improve the stability of the circular ring substrate 10 when it is lifted or lowered, and avoid shaking during lifting and moving to affect the acquisition clarity of the camera 14;

[0032] In order to facilitate the adjustment of the height of the camera 14, the circular ring substrate 10 is sleeved on the outer side of the upper pressure head 6, and a lifting drive structure for driving the circular ring substrate 10 to rise and fall is provided between the circular ring substrate 10 and the top seat 2. The lifting drive structure includes two groups of cylinders 8, and the two groups of cylinders 8 are fixedly connected to the upper wall of the top seat 2 and are respectively located on the front and rear sides of the hydraulic driver 7. The extension shafts of the two groups of cylinders 8 penetrate the inner wall of the top seat 2 and extend to the lower side of the top seat 2. The ends of the extension shafts of the two groups of cylinders 8 are fixedly connected to the upper wall of the circular ring substrate 10. The extension and retraction of the extension shafts of the cylinders 8 can drive the circular ring substrate 10 to descend and rise, and then drive the camera 14 to descend and rise, thereby achieving the purpose of adjusting the height of the camera 14;

[0033] In order to record the entire process of changes in the concrete test block during the pressure application process in an all-round manner, four groups of rotating seats 11 are fixedly connected to the lower wall of the circular ring base plate 10. The four groups of rotating seats 11 are equally distributed in a circle with the center of the circular ring base plate 10 as the center. A rotating block 12 is rotatably connected to the inner wall of the rotating seat 11. A collection structure for collecting test information is provided on the side of the rotating block 12 facing the upper pressure head 6. The collection structure is a camera 14. The camera 14 is fixedly connected to the side of the rotating block 12 facing the upper pressure head 6. The four groups of rotating blocks 12 are provided with cameras 14 at one end facing the upper pressure head 6. The collection range of the four groups of cameras 14 can cover the front, back, left, right and four sides of the concrete test block, thereby playing a role in comprehensive monitoring and recording.

[0034] In order to facilitate the adjustment of the pitch angle of the camera 14, an adjustment structure for adjusting the pitch angle of the rotating block 12 to adjust the collection direction of the collection structure is provided between the end of the rotating block 12 away from the upper pressure head 6 and the lower wall of the circular ring base plate 10. The adjustment structure is an electric telescopic rod 13, which is rotatably connected between the lower wall of the circular ring base plate 10 and the end of the rotating block 12 away from the collection structure. The electric telescopic rod 13 extends and retracts the shaft, which can drive the rotating block 12 to rotate along the connection between the rotating block 12 and the rotating seat 11, thereby adjusting the pitch angle of the camera 14, so that the shooting range is wider;

[0035] In order to achieve the purpose of protecting the camera 14, a protective baffle 17 for protecting the acquisition structure is clamped between the circular base plate 10 and the rotating seat 11 through a clamping structure. The protective baffle 17 is located between the acquisition structure and the upper pressure head 6 in a top view. The clamping structure includes two groups of clamping seats 15 and clamping strips 16. The two groups of clamping strips 16 are fixedly connected to one end of the protective baffle 17 facing the rotating seat 11 and are respectively close to the upper and lower ends of the protective baffle 17. The two groups of clamping seats 15 are respectively fixedly connected to one end of the rotating seat 11 away from the circular base plate 10 and the lower wall of the circular base plate 10 and are located on the side of the rotating seat 11 facing the upper pressure head 6. The ends of the two groups of clamping strips 16 away from the protective baffle 17 are respectively connected to the two groups of clamping seats 15 inner wall is clamped, the inner walls of the two groups of clamping seats 15 are both provided with a rubber layer 1501, the protective baffle 17 is clamped with the two groups of clamping seats 15 through the two groups of clamping strips 16, and the rubber layer 1501 is used between the clamping strips 16 and the clamping seat 15 to increase the friction force, the protective baffle 17 is a hard and highly transparent acrylic plate, and the protective baffle 17 is fixed by clamping the clamping strips 16 and the clamping seat 15, so that the protective baffle 17 is easy to disassemble and install, when the protective baffle 17 is worn and affects the shooting of the camera 14, it can be conveniently replaced, and during the shooting process of the camera 14, the protection of the protective baffle 17 can prevent the camera 14 from being damaged by flying fragments during the pressure application process, thereby effectively improving the service life of the device.

[0036] Working principle: When placing blocks and cleaning block fragments, the circular base plate 10 is driven by the cylinder 8 to retract into the enclosure 4, which does not affect the placement and cleaning operations; the two sets of guide columns 9 can effectively improve the stability of the circular base plate 10 during lifting and lowering, and avoid shaking during lifting and lowering to affect the acquisition clarity of the camera 14; the cylinder 8 extends and retracts the shaft, which can drive the circular base plate 10 to descend and rise, and then drive the camera 14 to descend and rise, so as to achieve the purpose of adjusting the height of the camera 14; the four sets of rotating blocks 12 are all provided with cameras 14 at one end facing the upper pressure head 6, and the acquisition range of the four sets of cameras 14 can cover the front, back, left and right sides of the concrete test block, playing a role in comprehensive monitoring and recording. The electric telescopic rod 13 extends and retracts the axis, which can drive the rotating block 12 to rotate along the connection between the rotating block 12 and the rotating seat 11, thereby adjusting the pitch angle of the camera 14 to make the shooting range wider; when the protective baffle 17 is worn and affects the shooting of the camera 14, it can be easily replaced. During the shooting process of the camera 14, the protective baffle 17 can protect the camera 14 from being damaged by flying fragments during the pressure application process, thereby effectively improving the service life of the device.

[0037] 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 substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure testing device for ultra-high performance concrete processing, characterized in that: The invention comprises a base (1), a top seat (2), a pressure platform (5), an upper pressure head (6) and a hydraulic driver (7), wherein the top seat (2) is fixedly connected to the upper wall of the base (1) through four groups of columns (3), the pressure platform (5) is fixedly connected to the upper wall of the base (1) and is located in the middle, the hydraulic driver (7) is fixedly connected to the upper wall of the top seat (2), the extension shaft of the hydraulic driver (7) passes through the inner wall of the top seat (2) and extends to the lower side of the top seat (2), the upper pressure head (6) is fixedly connected to the end of the extension shaft of the hydraulic driver (7), the lower wall of the top seat (2) is fixedly connected to a baffle (4), the lower wall of the top seat (2) is slidably connected to a circular base plate (10) through a guide structure, the circular base plate (10) is sleeved on the outer side of the upper pressure head (6), and a shaft for driving the circular base plate (10) is provided between the circular base plate (10) and the top seat (2). 10) a lifting and lowering driving structure, wherein four groups of rotating seats (11) are fixedly connected to the lower wall of the circular ring substrate (10), and the four groups of rotating seats (11) are equally distributed on the circumference with the center of the circular ring substrate (10) as the center. The inner wall of the rotating seat (11) is rotatably connected to a rotating block (12), and a collection structure for collecting test information is provided on the side of the rotating block (12) facing the upper pressure head (6). An adjustment structure for adjusting the pitch angle of the rotating block (12) to adjust the collection direction of the collection structure is provided between the end of the rotating block (12) away from the upper pressure head (6) and the lower wall of the circular ring substrate (10). A protective baffle (17) for protecting the collection structure is clamped between the circular ring substrate (10) and the rotating seat (11) through a clamping structure, and the protective baffle (17) is located between the collection structure and the upper pressure head (6) in a top view.

2. A pressure testing device for ultra-high performance concrete processing according to claim 1, characterized in that: The guide structure comprises two groups of guide columns (9), the two groups of guide columns (9) are fixedly connected to the upper wall of the circular ring base (10) and are respectively located on the left and right sides of the upper pressure head (6), and the ends of the two groups of guide columns (9) away from the circular ring base (10) penetrate the inner wall of the top seat (2) and are slidably connected thereto.

3. A pressure testing device for ultra-high performance concrete processing according to claim 2, characterized in that: The lifting drive structure comprises two groups of cylinders (8), the two groups of cylinders (8) are fixedly connected to the upper wall of the top seat (2) and are respectively located on the front and rear sides of the hydraulic driver (7), the extension shafts of the two groups of cylinders (8) pass through the inner wall of the top seat (2) and extend to the lower side of the top seat (2), and the ends of the extension shafts of the two groups of cylinders (8) are fixedly connected to the upper wall of the circular base plate (10).

4. A pressure testing device for ultra-high performance concrete processing according to claim 3, characterized in that: The acquisition structure is a camera (14), and the camera (14) is fixedly connected to a side of the rotating block (12) facing the upper pressing head (6).

5. A pressure testing device for ultra-high performance concrete processing according to claim 4, characterized in that: The adjustment structure is an electric telescopic rod (13), and the electric telescopic rod (13) is rotatably connected between the lower wall of the annular base plate (10) and an end of the rotating block (12) away from the collection structure.

6. A pressure testing device for ultra-high performance concrete processing according to claim 5, characterized in that: The clamping structure comprises two groups of clamping seats (15) and clamping strips (16). The two groups of clamping strips (16) are fixedly connected to one end of the protective baffle (17) facing the rotating seat (11) and are respectively close to the upper and lower ends of the protective baffle (17). The two groups of clamping seats (15) are respectively fixedly connected to one end of the rotating seat (11) away from the annular base plate (10) and the lower wall of the annular base plate (10) and are located on the side of the rotating seat (11) facing the upper pressure head (6). The ends of the two groups of clamping strips (16) away from the protective baffle (17) are respectively clamped to the inner side walls of the two groups of clamping seats (15). The inner side walls of the two groups of clamping seats (15) are both provided with a rubber layer (1501). The protective baffle (17) is clamped to the two groups of clamping seats (15) through the two groups of clamping strips (16). The rubber layer (1501) is used to increase the friction between the clamping strips (16) and the clamping seat (15).

7. A pressure testing device for ultra-high performance concrete processing according to claim 6, characterized in that: The protective baffle (17) is a hard and highly transparent acrylic plate.

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