A device for testing the performance of building concrete

Abstract

This invention belongs to the field of concrete product performance testing technology and discloses a building concrete performance testing device. Existing testing devices use a method of placing precast stairs horizontally for static load pressure testing. This method is only suitable for the initial screening of precast stairs and cannot truly reflect the actual load-bearing capacity of precast stairs. The technical solution of this invention includes a frame-shaped mounting frame with several support legs fixedly installed on the bottom surface of the mounting frame. Two V-shaped hinge frames are set inside the mounting frame. Each hinge frame consists of a hinge shaft and two hinge rods. A movable shaft is set inside the mounting frame, and an adjustment device for adjusting the included angle of the hinge frames is set on the movable shaft. This invention can be applied to the testing of stairs of different lengths within a certain range. This invention can keep the precast stairs in a horizontal state to complete the initial screening of precast stairs. This invention can adjust the step surface of the precast stairs to be horizontal, so that the test results directly correspond to the actual performance in use.

Description

Technical Field

[0001] This invention belongs to the field of concrete product performance testing technology, and specifically relates to a device for testing the performance of building concrete. Background Technology

[0002] Precast concrete stairs are common concrete products used in building construction. They are concrete stair components produced in factories or prefabrication sites. They are characterized by standardized production processes, controllable quality, and high construction efficiency, and are widely used in residential buildings, commercial buildings, industrial buildings, and landscape architecture. Precast concrete stairs need to undergo static load testing to determine their stability. Existing testing devices place the precast stairs at an angle to make the steps level, requiring a crane to continuously adjust and change the angle of the precast stairs. In the prior art, Chinese patent with publication number CN118329428B discloses a performance testing device for concrete products in building construction. This prior art requires setting up a structure above the precast stairs to apply static load, which is inconvenient for the installation of precast stairs. In addition, the prior art with publication number CN222353516U discloses a device for testing the structural performance of stair components. This prior art uses the method of placing the prefabricated staircase horizontally to perform static load pressure testing. This method is only suitable for the preliminary screening of prefabricated staircases and cannot truly reflect the actual load-bearing capacity of the prefabricated staircases. Summary of the Invention

[0003] To address the shortcomings of the prior art, the present invention aims to provide a building concrete performance testing device. This device is applicable to the testing of stairs of different lengths within a certain range. The present invention enables the precast stairs to be in a horizontal state, completing the initial screening of the precast stairs. The present invention can adjust the step surface of the precast stairs to be horizontal, so that the test results directly correspond to the actual performance in use.

[0004] The technical solution adopted by this building concrete performance testing device to solve its technical problems is as follows: A device for testing the performance of building concrete is provided, including a frame-shaped mounting frame. Several support legs are fixedly installed on the bottom surface of the mounting frame. Two V-shaped hinge frames are provided inside the mounting frame. Each hinge frame consists of a hinge shaft and two hinge rods. A movable shaft is provided inside the mounting frame. An adjustment device for adjusting the included angle of the hinge frames is provided on the movable shaft. A moving device for adjusting the position of the movable shaft is provided inside the mounting frame. Two mounting plates are provided on the top of the mounting frame. The bottom surface of the mounting plates is hinged to the end of the corresponding hinge frame. The mounting bracket is equipped with a control device for controlling the angle of the hinge bracket; The mounting frame has several inverted U-shaped movable frames on its top surface, and static load devices are evenly arranged on the movable frames. The mounting frame also has a positioning device for the position of the movable frames on its top surface.

[0005] Furthermore, the moving device includes a moving motor, and the inner wall of the mounting frame is provided with moving slide grooves on the front and back sides respectively. Moving sliders are provided in the moving slide grooves and slide with them respectively. The front and rear ends of the moving shaft are fixedly connected to the corresponding moving sliders. The moving motor is fixedly installed on one side of the mounting frame. A moving screw is provided in one of the moving slide grooves. One end of the moving screw is fixedly connected to the output shaft of the moving motor. The moving screw passes through the corresponding moving slider and is threadedly engaged.

[0006] Furthermore, the adjustment device includes an adjusting hydraulic rod, with mounting rings fixedly installed at both ends of the adjusting hydraulic rod. A movable shaft passes through the mounting ring at the upper part of the adjusting hydraulic rod and is rotatably connected. The hinge joints of the two hinge frames share the same hinge shaft, which passes through the mounting ring at the lower part of the adjusting hydraulic rod and is rotatably connected. First support plates are fixedly installed on the opposite surfaces of the front and rear distributed support legs. Support wheels are installed on the hinge rods via mounting brackets, and the support wheels are in contact with the top surface of the first support plates.

[0007] Furthermore, the control device includes a second support plate, which is fixedly installed on one side of the opposite side of the first support plate. The support wheels are divided into a first support wheel and a second support wheel. The first support wheel contacts the top surface of the first support plate, and the second support wheel contacts the top surface of the second support plate. An inclined plate is installed between the opposite sides of the first support plate by a bolt structure, and a counterweight is installed on one of the mounting plates by a bolt structure.

[0008] Furthermore, a limit plate is provided above the first support plate.

[0009] Furthermore, the static load device includes a lifting plate, a static pressure support hydraulic cylinder, and a pressure plate. The lifting plate is installed inside a movable frame, and the movable frame is equipped with a lifting device that drives the lifting plate to move up and down. The fixed end of the static pressure support hydraulic cylinder is fixedly connected to the bottom surface of the lifting plate, and the pressure plate is installed on the movable end of the static pressure support hydraulic cylinder through a snap-fit ​​structure.

[0010] Furthermore, the lifting device includes a lifting motor, a lifting screw, and a guide rod. The lifting motor is fixedly installed on the top surface of the movable frame. The output shaft of the lifting motor passes through the movable frame and is rotatably connected. The upper end of the lifting screw is fixedly connected to the output shaft of the lifting motor. The lifting screw passes through the lifting plate and is threadedly engaged. The upper end of the guide rod is fixedly connected to the top surface of the inner wall of the movable frame. The guide rod passes through the lifting plate and is clearance-fitted.

[0011] Furthermore, the positioning device includes two limiting slide rails, several limiting sliders, several fastening bolts, and several fastening plates. The limiting slide rails are fixedly installed on the front and rear sides of the top of the mounting frame. The limiting sliders are respectively located in the corresponding limiting slide rails and can slide along them. The lower end of the movable frame is fixedly connected to the corresponding limiting sliders. The fastening plates are respectively fixedly installed on the front and rear sides of the outer periphery of the movable frame. The fastening bolts pass through the fastening plates and are threaded together.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. An example of the present invention is a building concrete performance testing device. The user adjusts the angle of the hinge frame according to the length of the precast staircase to be tested, thereby adjusting the distance between the two mounting plates. A crane places both ends of the precast staircase on the mounting plates and connects and fixes them with bolts. A moving device drives a moving shaft to move, which in turn moves the precast staircase to the left via the adjusting device, hinge frame, and mounting plates. A control device controls the angle of the hinge frame, allowing the angle of the precast staircase to change. A positioning device adjusts and fixes the position of the movable frame. A static load device can... The precast staircase is subjected to static load pressure. When the precast staircase is placed horizontally, the static load device can detect whether there is loose concrete or missing reinforcement in the precast staircase after applying pressure, thus completing the initial screening. When the precast staircase is tilted, the step surface is horizontal, and the test results directly correspond to the actual performance in use, which is the basis for the qualification judgment required by the standard. Compared with the prior art, the present invention can be applied to the testing of staircases of different lengths within a certain range. The present invention can make the precast staircase horizontal, complete the initial screening of the precast staircase, and adjust the step surface of the precast staircase to be horizontal, so that the test results directly correspond to the actual performance in use.

[0013] 2. In an example of the present invention, a building concrete performance testing device is provided. When the moving motor is turned on, the output shaft of the moving motor rotates, which drives the moving screw to rotate. The rotation of the moving screw drives the moving slider to move left and right, which in turn drives the moving shaft to move left and right, thereby adjusting the position of the moving shaft.

[0014] 3. An example of the present invention is a building concrete performance testing device. By adjusting the extension and retraction of the hydraulic rod, the hinge shaft can be moved up and down. Under the action of gravity, the support wheel is always in contact with the top surface of the first support plate, thereby enabling the hinge rod to rotate and adjust the angle of the hinge frame, which facilitates the installation of the prefabricated stairs. In addition, the movement of the moving shaft can drive the hinge frame to move by adjusting the hydraulic rod and the mounting ring.

[0015] 4. In an example of the present invention, a building concrete performance testing device is provided. The counterweight enables the rotation center of the hinge frame to be located to the right of the center of gravity, thereby enabling the hinge frame to rotate counterclockwise under the action of gravity. When the moving device drives the hinge frame to move to the left, the second support wheel can be separated from the second support plate. As the hinge frame continues to move to the left, the first support wheel can contact the inclined plate, thereby enabling the hinge frame to rotate and making the step surface of the precast step horizontal. When the moving device drives the hinge frame to move to the right, the hinge frame rotates counterclockwise under the action of gravity, thereby resetting.

[0016] 5. In an example of the present invention, a building concrete performance testing device is provided, wherein the limiting plate can limit the first support wheel and prevent the first limiting plate from flipping upward.

[0017] 6. An example of the present invention is a building concrete performance testing device, which can drive the lifting plate to move downward through the lifting device. The downward movement of the lifting plate can drive the static pressure support hydraulic cylinder to move downward, so that the pressure plate can contact the precast stairs. The static pressure support hydraulic cylinder can provide stable downward pressure, thereby enabling static load testing of the precast stairs.

[0018] 7. An example of the present invention is a building concrete performance testing device. When the lifting motor is turned on, the output shaft of the lifting motor rotates, which drives the lifting screw to rotate. The rotation of the lifting screw drives the lifting plate to move up and down. The guide rod can play a guiding role. The lifting device has a simple structure and is easy to use.

[0019] 8. In an example of the present invention, a building concrete performance testing device is provided, wherein the limiting slider and the limiting slide rail can limit and guide the movable frame, the user can move the movable frame to adjust its position, and the movable frame can be tightened and fixed by fastening bolts. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the movable frame structure.

[0021] In the diagram: 1. Mounting frame; 2. Hinge frame; 3. Moving shaft; 4. Mounting plate; 5. Movable frame; 6. Moving motor; 7. Moving slide rail; 8. Moving slider; 9. Moving screw; 10. Adjusting hydraulic rod; 11. Mounting ring; 12. First support plate; 13. Support wheel; 14. Second support plate; 15. Inclined plate; 16. Counterweight; 17. Limiting plate; 18. Lifting plate; 19. Static pressure support hydraulic cylinder; 20. Pressure plate; 21. Lifting motor; 22. Lifting screw; 23. Guide rod; 24. Limiting slide rail; 25. Limiting slider; 26. Fastening bolt; 27. Fastening plate. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-3 As shown, a building concrete performance testing device includes a frame-shaped mounting frame 1. Several support legs are fixedly installed on the bottom surface of the mounting frame 1. Two V-shaped hinge frames 2 are installed inside the mounting frame 1. Each hinge frame 2 consists of a hinge shaft and two hinge rods. The two hinge frames 2 are arranged one in front of the other. A movable shaft 3 is installed inside the mounting frame 1. An adjustment device for adjusting the included angle of the hinge frames 2 is installed on the movable shaft 3. A moving device for adjusting the position of the movable shaft 3 is installed inside the mounting frame 1. Two mounting plates 4 are installed above the mounting frame 1. The mounting plates 4 are engaged with the ends of precast stairs and can be connected by a threaded structure. The bottom surfaces of the mounting plates 4 are respectively hinged to the ends of the corresponding hinge frames 2. The mounting frame 1 is equipped with a control device for controlling the angle of the hinge frame 2; The mounting frame 1 has several inverted U-shaped movable frames 5 on its top surface. Static load devices are evenly distributed on each movable frame 5. The top surface of the mounting frame 1 also has a positioning device for the movable frames 5. The user adjusts the angle of the hinge frame 2 according to the length of the prefabricated staircase to be tested, thereby adjusting the distance between the two mounting plates 4. A crane places both ends of the prefabricated staircase onto the mounting plates 4 and connects them with bolts. A moving device drives the moving shaft 3, which, through the adjusting device, hinge frame 2, and mounting plates 4, moves the prefabricated staircase to the left. A control device controls the angle of the hinge frame 2, allowing the angle of the prefabricated staircase to change. The positioning device adjusts and fixes the position of the movable frames 5. Static load devices apply pressure to the prefabricated staircase. Static load testing, when the precast staircase is placed horizontally, applies pressure to detect whether there is loose concrete or missing reinforcing steel, thus completing the initial screening. When the precast staircase is tilted, the step surface is horizontal, and the test results directly correspond to the actual performance, serving as the basis for qualification as required by regulations. Compared with existing technologies, this invention is applicable to the testing of staircases of different lengths within a certain range. This invention enables the precast staircase to be in a horizontal state, completing the initial screening of the precast staircase. This invention can adjust the step surface of the precast staircase to be horizontal, so that the test results directly correspond to the actual performance.

[0025] like Figure 1-3 As shown, in a further preferred embodiment, the moving device includes a moving motor 6, which is a geared motor. The moving motor 6 is controlled by a motor controller. The inner wall of the mounting frame 1 has moving grooves 7 on its front and rear sides, and moving sliders 8 are respectively provided in the moving grooves 7. The bottom surface of the moving slider 8 contacts and slides with the bottom surface of the inner wall of the moving groove 7. The moving groove 7 can support the top surface of the moving slider 8. The front and rear ends of the moving shaft 3 are respectively fixedly connected to the corresponding moving sliders 8. The moving motor 6 is fixedly installed on one side of the mounting frame 1. A moving screw 9 is provided in one of the moving grooves 7. One end of the moving screw 9 is fixedly connected to the output shaft of the moving motor 6. The output shaft of the moving motor 6 passes through the mounting frame 1 and is rotatably connected. The other end of the moving screw 9 is rotatably connected to the inner wall of the corresponding moving groove 7. The moving screw 9 passes through the corresponding moving slider 8 and is threaded. The moving screw 9 adopts a trapezoidal thread. The trapezoidal thread is a conventional choice for heavy-duty transmission in this field. It has high transmission efficiency and good self-locking performance, avoiding slippage or jamming under load. Turning on the moving motor 6 causes the output shaft of the moving motor 6 to rotate, which in turn drives the moving screw 9 to rotate. The rotation of the moving screw 9 causes the moving slider 8 to move left and right, which in turn drives the moving shaft 3 to move left and right, thereby adjusting the position of the moving shaft 3.

[0026] like Figure 1-3As shown, in a further preferred embodiment, the adjusting device includes an adjusting hydraulic rod 10, which is controlled by a hydraulic control system. Mounting rings 11 are fixedly installed at both ends of the adjusting hydraulic rod 10. A moving shaft 3 passes through the mounting ring 11 at the upper part of the adjusting hydraulic rod 10 and is rotatably connected. The hinge joints of the two hinge frames 2 share the same hinge shaft, which passes through the mounting ring 11 at the lower part of the adjusting hydraulic rod 10 and is rotatably connected. First support plates 12 are fixedly installed on the opposite surfaces of the front and rear distributed support legs. Support wheels 13 are mounted on the hinge rods via mounting brackets, and the support wheels 13 contact the top surface of the first support plates 12. The extension and retraction of the adjusting hydraulic rod 10 can drive the hinge shaft to move up and down. Under the action of gravity, the support wheels 13 always contact the top surface of the first support plates 12, thereby allowing the hinge rods to rotate and adjust the angle of the hinge frames 2, facilitating the installation of the prefabricated stairs. Furthermore, the movement of the moving shaft 3 can drive the hinge frames 2 to move via the adjusting hydraulic rod 10 and the mounting rings 11.

[0027] like Figure 1-3 As shown, in a further preferred embodiment, the control device includes a second support plate 14, which is fixedly installed on one side of the opposite side of the first support plate 12. The support wheel 13 is divided into a first support wheel and a second support wheel. The first support wheel contacts the top surface of the first support plate 12, and the second support wheel contacts the top surface of the second support plate 14. An inclined plate 15 is installed between the opposite sides of the first support plate 12 by bolts. The inclined plate 15 has a T-shaped structure, and its slot can be engaged with the bottom surface of the first support plate 12, thereby providing a fixed support function. A counterweight 16 is installed on one of the mounting plates 4 by bolts. The counterweight 16 is located on the left mounting plate 4. The counterweight 16 enables the rotation center of the hinge frame 2 to be located to the right of the center of gravity, thereby enabling the hinge frame 2 to rotate counterclockwise under the action of gravity. When the moving device drives the hinge frame 2 to move to the left, the second support wheel can be separated from the second support plate 14. As the hinge frame 2 continues to move to the left, the first support wheel can contact the inclined plate 15, thereby enabling the hinge frame 2 to rotate and making the step surface of the precast step horizontal. When the moving device drives the hinge frame 2 to move to the right, the hinge frame 2 rotates counterclockwise under the action of gravity, thereby resetting.

[0028] like Figure 1-3 As shown, in a further preferred embodiment, a limiting plate 17 is respectively provided above the first support plate 12 and fixedly installed on the mounting bracket 1. The limiting plate 17 can limit the first support wheel and prevent the first limiting plate 17 from flipping upward.

[0029] like Figure 1-3As shown, in a further preferred embodiment, the static load device includes a lifting plate 18, a static pressure support hydraulic cylinder 19, and a pressure plate 20. The static pressure support hydraulic cylinder 19 is controlled and adjusted by an existing hydraulic control system. The lifting plate 18 is disposed within a movable frame 5, and the movable frame 5 is equipped with a lifting device that drives the lifting plate 18 to move up and down. The fixed end of the static pressure support hydraulic cylinder 19 is fixedly connected to the bottom surface of the lifting plate 18. The pressure plate 20 is installed on the movable end of the static pressure support hydraulic cylinder 19 through a snap-fit ​​structure. The pressure plate 20 has different shapes with matching contact surfaces to avoid lateral static load during the downward pressing process driven by the static pressure support hydraulic cylinder 19. The lifting device can drive the lifting plate 18 to move downward, and the downward movement of the lifting plate 18 can drive the static pressure support hydraulic cylinder 19 to move downward, allowing the pressure plate 20 to contact the precast staircase. The static pressure support hydraulic cylinder 19 can provide stable downward pressure, thereby enabling static load testing of the precast staircase.

[0030] like Figure 1-3 As shown, in a further preferred embodiment, the lifting device includes a lifting motor 21, a lifting screw 22, and a guide rod 23. The lifting motor 21 is controlled by a motor controller and is a geared motor. The lifting motor 21 is fixedly installed on the top surface of the movable frame 5. The output shaft of the lifting motor 21 passes through the movable frame 5 and is rotatably connected. The upper end of the lifting screw 22 is fixedly connected to the output shaft of the lifting motor 21. The lifting screw 22 passes through the lifting plate 18 and is threadedly engaged. The upper end of the guide rod 23 is fixedly connected to the top surface of the inner wall of the movable frame 5. The lower end of the lifting screw 22 is fixedly connected to the inner wall of the movable frame 5 through a bearing seat. The lower end of the guide rod 23 is fixedly connected to the inner wall of the movable frame 5 through a connecting plate. The guide rod 23 passes through the lifting plate 18 and is clearance-fitted. When the lifting motor 21 is turned on, the output shaft of the lifting motor 21 rotates, which drives the lifting screw 22 to rotate. The rotation of the lifting screw 22 drives the lifting plate 18 to move up and down. The guide rod 23 provides guidance. This lifting device has a simple structure and is easy to use.

[0031] like Figure 1-3As shown, in a further preferred embodiment, the positioning device includes two limiting slide rails 24, several limiting sliders 25, several fastening bolts 26, and several fastening plates 27. The limiting slide rails 24 are fixedly installed on the front and rear sides of the top of the mounting frame 1. The limiting sliders 25 are respectively located within the corresponding limiting slide rails 24 and can slide along them. The limiting sliders 25 cannot detach from the limiting slide rails 24. A movable handle is fixedly installed on the outer periphery of the movable frame 5, making it convenient for the user to pull the movable frame 5 to move it. The lower end of the movable frame 5 is fixedly connected to the corresponding limiting sliders 25. The fastening plates 27 are respectively fixedly installed on the front and rear sides of the outer periphery of the movable frame 5. The fastening bolts 26 pass through the fastening plates 27 and are threaded together. A washer is fixedly installed on the lower end of the fastening bolts 26. The limiting sliders 25 and the limiting slide rails 24 can provide limiting and guiding functions for the movable frame 5. The user can move the movable frame 5 to adjust its position, and the fastening bolts 26 can tighten and fix the movable frame 5.

[0032] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0033] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this invention, the other technical features will not be described in detail here.

Claims

1. A device for testing the performance of building concrete, comprising a frame-shaped mounting frame (1), wherein several support legs are fixedly mounted on the bottom surface of the mounting frame (1), characterized in that, The mounting frame (1) is provided with two V-shaped hinge frames (2). Each hinge frame (2) consists of a hinge shaft and two hinge rods. The mounting frame (1) is provided with a moving shaft (3). The moving shaft (3) is provided with an adjustment device for adjusting the included angle of the hinge frame (2). The mounting frame (1) is provided with a moving device for adjusting the position of the moving shaft (3). The mounting frame (1) is provided with two mounting plates (4) on top of the mounting frame (1). The bottom surface of the mounting plates (4) is respectively hinged to the end of the corresponding hinge frame (2). The mounting bracket (1) is equipped with a control device for controlling the angle of the hinge bracket (2); The mounting frame (1) has several inverted U-shaped movable frames (5) on its top surface. Static load devices are evenly arranged on the movable frames (5). The mounting frame (1) has a positioning device for the position of the movable frames (5) on its top surface.

2. The building concrete performance testing device according to claim 1, characterized in that, The moving device includes a moving motor (6), which is a geared motor. The inner wall of the mounting frame (1) is provided with moving grooves (7) at the front and back respectively. Moving sliders (8) that slide with it are respectively provided in the moving grooves (7). The front and rear ends of the moving shaft (3) are respectively fixedly connected to the corresponding moving sliders (8). The moving motor (6) is fixedly installed on one side of the mounting frame (1). A moving screw (9) is provided in one of the moving grooves (7). One end of the moving screw (9) is fixedly connected to the output shaft of the moving motor (6). The moving screw (9) passes through the corresponding moving slider (8) and is threaded.

3. The building concrete performance testing device according to claim 1, characterized in that, The adjustment device includes an adjustment hydraulic rod (10), with mounting rings (11) fixedly installed at both ends of the adjustment hydraulic rod (10). The moving shaft (3) passes through the mounting ring (11) at the top of the adjustment hydraulic rod (10) and is rotatably connected. The hinge joints of the two hinge frames (2) share the same hinge shaft. The hinge shaft passes through the mounting ring (11) at the bottom of the adjustment hydraulic rod (10) and is rotatably connected. The front and rear support legs are fixedly installed with first support plates (12) on their opposite sides. Support wheels (13) are installed on the hinge rods through mounting frames. The support wheels (13) are in contact with the top surface of the first support plate (12).

4. The building concrete performance testing device according to claim 3, characterized in that, The control device includes a second support plate (14), which is fixedly installed on one side of the opposite side of the first support plate (12). The support wheel (13) is divided into a first support wheel and a second support wheel. The first support wheel contacts the top surface of the first support plate (12), and the second support wheel contacts the top surface of the second support plate (14). An inclined plate (15) is installed between the opposite sides of the first support plate (12) by a bolt structure. A counterweight (16) is installed on one of the mounting plates (4) by a bolt structure.

5. The building concrete performance testing device according to claim 4, characterized in that, Limiting plates (17) are respectively provided above the first support plate (12) and fixedly installed on the mounting frame (1).

6. The building concrete performance testing device according to claim 1, characterized in that, The static load device includes a lifting plate (18), a static pressure support hydraulic cylinder (19), and a pressure plate (20). The lifting plate (18) is set inside the movable frame (5). The movable frame (5) is equipped with a lifting device that drives the lifting plate (18) to move up and down. The fixed end of the static pressure support hydraulic cylinder (19) is fixedly connected to the bottom surface of the lifting plate (18). The pressure plate (20) is installed on the movable end of the static pressure support hydraulic cylinder (19) through a snap-fit ​​structure.

7. The building concrete performance testing device according to claim 1, characterized in that, The lifting device includes a lifting motor (21), a lifting screw (22), and a guide rod (23). The lifting motor (21) is fixedly installed on the top surface of the movable frame (5). The output shaft of the lifting motor (21) passes through the movable frame (5) and is rotatably connected. The upper end of the lifting screw (22) is fixedly connected to the output shaft of the lifting motor (21). The lifting screw (22) passes through the lifting plate (18) and is threaded. The upper end of the guide rod (23) is fixedly connected to the top surface of the inner wall of the movable frame (5). The guide rod (23) passes through the lifting plate (18) and is clearance-fitted.

8. A testing device for the performance of building concrete according to any one of claims 1 or 7, characterized in that, The positioning device includes two limiting slide rails (24), several limiting sliders (25), several fastening bolts (26) and several fastening plates (27). The limiting slide rails (24) are fixedly installed on the front and rear sides of the top of the mounting frame (1). The limiting sliders (25) are respectively located in the corresponding limiting slide rails (24) and can slide along them. The lower end of the movable frame (5) is fixedly connected to the corresponding limiting sliders (25). The fastening plates (27) are respectively fixedly installed on the front and rear sides of the outer periphery of the movable frame (5). The fastening bolts (26) pass through the fastening plates (27) and are threaded together.

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