A device for testing the tensile strength of concrete for traffic engineering

Abstract

The utility model relates to the field of concrete tensile strength test, disclose a kind of concrete tensile strength testing device for traffic design, including fixed base, the fixed base inside is provided with multiple sets of testing mechanism and single set of testing mechanism, the multiple sets of testing mechanism include fixed shell, the fixed shell outer wall is fixedly connected with fixed base outer wall, the fixed shell inner wall is rotatably connected with cross rotating drum, the cross rotating drum inner wall is slidably connected with cross rotating rod, the cross rotating rod bottom end is fixedly connected with connecting column. In the utility model, multiple sets of testing mechanism are started motor in fixed shell, are driven by fixed rotating rod, bevel gear, cross rotating drum, cross rotating rod, worm, worm wheel, thread rod one, moving block one and hinged link one transmission, drive pressing block to multiple sets of concrete test piece synchronous tension, avoid repeatedly to pack and unpack test piece and adjust parameter, improve test efficiency, guarantee data consistency, can also quickly issue detection result.

Description

Technical Field

[0001] This utility model relates to the field of concrete tensile strength testing, and in particular to a concrete tensile strength testing device for traffic design. Background Technology

[0002] In the field of transportation design, concrete tensile strength testing is an experiment to evaluate the ability of concrete to resist tensile failure in transportation infrastructure such as roads and bridges. It involves applying tensile force to the specimen or indirectly generating tensile force until it breaks, and then calculating the tensile strength based on the dimensions. The results are affected by factors such as raw materials and curing, and can be used to verify material strength, design supporting structures, and control construction quality.

[0003] Before using a concrete tensile strength testing device for traffic design, check the equipment status to ensure the sensor is sensitive. Then, prepare concrete specimens that meet the specifications and clean the specimen surface. When using a direct tension device, accurately align both ends of the specimen with the clamp and adjust the coaxiality. When using a splitting test device, place pads on the upper and lower surfaces of the specimen and align them with the center of the device. Then, set parameters such as the loading rate and start the device to apply the load uniformly. Record the load changes in real time until the specimen breaks. After the test, calculate the tensile strength based on the recorded maximum load and specimen size, and compile the test data to form a report.

[0004] The concrete tensile strength testing devices used in traffic design are mostly single-station structures, making it difficult to test multiple sets of specimens simultaneously. This requires repeated shutdowns to load and unload specimens and adjust parameters, resulting in prolonged equipment downtime and repetitive operations. This not only lengthens the testing cycle but may also affect data consistency due to testing intervals, making it easier to delay the feedback of test results and interfere with the construction and design progress of traffic projects. Therefore, a concrete tensile strength testing device for traffic design is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a concrete tensile strength testing device for traffic design, which aims to solve the problem that existing concrete tensile strength testing devices for traffic design generally have difficulty in simultaneously testing the tensile strength of multiple sets of concrete specimens, resulting in low testing efficiency.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a concrete tensile strength testing device for traffic design, comprising a fixed base, wherein multiple sets of testing mechanisms and a single set of testing mechanisms are arranged inside the fixed base, the multiple sets of testing mechanisms include a fixed outer shell, the outer wall of the fixed outer shell is fixedly connected to the outer wall of the fixed base, a cross cylinder is rotatably connected to the inner wall of the fixed outer shell, a cross rod is slidably connected to the inner wall of the cross cylinder, a connecting column is fixedly connected to the bottom end of the cross rod, a worm is fixedly connected to the bottom end of the connecting column, a worm wheel is meshed with the outer wall of the worm, a threaded rod is fixedly connected to the inner wall of the worm wheel, a moving block is threadedly connected to the outer wall of the threaded rod through a threaded sleeve, and a pressure block is hinged to the inner wall of the moving block through a hinged rod.

[0007] As a further description of the above technical solution:

[0008] The multiple testing mechanisms also include a fixed shell, a motor is fixedly connected to the inner wall of the fixed shell, a fixed rotating rod is fixedly connected to the output shaft of the motor, a helical gear one is fixedly connected to the outer wall of the fixed rotating rod, a helical gear two is meshed with the outer wall of the helical gear one, and the inner wall of the helical gear two is fixedly connected to the outer wall of the cross rotating cylinder.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the threaded rod is threadedly connected to the inner wall of the threaded sleeve. The outer wall of the threaded sleeve is fixedly connected to the inner wall of the movable block. The inner wall of the movable block is slidably connected to the inner wall of the fixed outer shell. Both ends of the threaded rod are rotatably connected to the inner wall of the fixed outer shell. The outer wall of the cross-shaped rotating cylinder is rotatably connected to the inner wall of the fixed outer shell. The outer wall of the connecting column is rotatably connected to the inner wall of the fixed outer shell.

[0011] As a further description of the above technical solution:

[0012] One end of the hinge rod is hinged to the inner wall of the moving block, and the other end of the hinge rod is hinged to the inner wall of the pressure block.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the fixed rotating rod is rotatably connected to the inner wall of the fixed outer shell, the outer wall of the fixed shell is fixedly connected to the outer wall of the fixed outer shell, and the bottom end of the fixed shell is fixedly connected to the top end of the fixed base.

[0015] As a further description of the above technical solution:

[0016] The single-unit testing mechanism includes a handwheel, the outer wall of which is rotatably connected to the inner wall of the fixed housing. A threaded rod is fixedly connected to the side wall of the handwheel. A movable block is threadedly connected to the outer wall of the threaded rod via a threaded sleeve. A movable ring is hinged to the inner wall of the movable block via a hinged rod. The inner wall of the movable ring is rotatably connected to the outer wall of the cross-shaped rotating cylinder. The outer wall of the movable ring is slidably connected to the inner wall of the fixed housing. The outer wall of the movable block is slidably connected to the inner wall of the fixed housing. The outer wall of the threaded rod is rotatably connected to the inner wall of the fixed housing. A telescopic rod is fixedly connected to the inner wall of the cross-shaped rotating cylinder. The inner rod of the telescopic rod is fixedly connected to the outer wall of the cross-shaped rotating cylinder. The inner wall of the cross-shaped rotating cylinder is elastically connected to the outer wall of the cross-shaped rotating cylinder via a spring.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the threaded rod two is threadedly connected to the inner wall of the threaded sleeve two, the outer wall of the threaded sleeve two is fixedly connected to the inner wall of the moving block two, one end of the hinged rod two is hinged to the inner wall of the moving block two, and the other end of the hinged rod two is hinged to the inner wall of the moving ring.

[0019] As a further description of the above technical solution:

[0020] One end of the spring is fixedly connected to the inner wall of the cross-shaped rotating cylinder, and the other end of the spring is fixedly connected to the outer wall of the cross-shaped rotating rod.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, multiple sets of testing mechanisms drive the pressure block to apply tension to multiple sets of concrete specimens simultaneously by starting the motor in the fixed shell, which is then transmitted through the fixed rotating rod, helical gear, cross rotating cylinder, cross rotating rod, worm, worm wheel, threaded rod, moving block and hinge rod. This avoids repeated loading and unloading of specimens and parameter adjustment, improves testing efficiency, ensures data consistency, and allows for rapid output of test results.

[0023] 2. In this utility model, the single-group testing mechanism drives the transmission of related components by rotating the handwheel, so that the first helical gear and the second helical gear disengage. It can be flexibly switched to the single-group specimen testing mode, which retains the high efficiency of multi-group synchronous testing and meets the needs of single-group testing. This enhances the applicability of the device, can cope with different testing scenarios, and improves the practical value and operational flexibility of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a concrete tensile strength testing device for traffic design proposed in this utility model;

[0025] Figure 2 This utility model provides a schematic diagram of the fixed outer shell and the cross-sectional structure of the fixed shell for testing the tensile strength of concrete for traffic design.

[0026] Figure 3 This is a schematic diagram of the cross-shaped rotating cylinder structure of a concrete tensile strength testing device for traffic design proposed in this utility model.

[0027] Legend:

[0028] 1. Fixed base; 2. Multiple test mechanisms; 211. Fixed outer shell; 212. Fixed shell; 213. Connecting column; 214. Worm gear; 215. Worm wheel; 216. Threaded rod one; 217. Moving block one; 218. Hinge rod one; 219. Pressure block; 220. Motor; 221. Fixed rotating rod; 222. Helical gear one; 223. Helical gear two; 224. Cross rotating cylinder; 225. Cross rotating rod; 3. Single test mechanism; 311. Handwheel; 312. Threaded rod two; 313. Moving block two; 314. Hinge rod two; 315. Moving ring; 316. Spring; 317. Telescopic rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figures 1-3The present invention provides an embodiment of a concrete tensile strength testing device for traffic design, comprising a fixed base 1. The fixed base 1 contains multiple sets of testing mechanisms 2 and a single set of testing mechanisms 3. Each set of testing mechanisms 2 includes a fixed outer shell 211, which serves as the core mounting carrier for the multiple sets of testing mechanisms 2. The fixed outer shell 211 provides rotation and sliding space for components such as the cross-shaped rotating cylinder 224, the cross-shaped rotating rod 225, and the threaded rod 216, limiting the movement trajectory of each component, ensuring a stable and orderly transmission process, and protecting the internal components from external interference. The outer wall of the fixed outer shell 211 is fixedly connected to the outer wall of the fixed base 1, and the inner wall of the fixed outer shell 211 is rotatably connected. A cross-shaped rotating cylinder 224 is connected to a helical gear 223 and a cross-shaped rotating rod 225. When the helical gear 223 rotates, the cross-shaped rotating rod 225 rotates synchronously through the cross structure, transmitting test power. At the same time, it can move axially, driving the cross-shaped rotating rod 225 to move synchronously, realizing the meshing or disengagement of the helical gear 1 222 and the helical gear 223, and switching the test mode. The cross-shaped rotating rod 225 is slidably connected to the inner wall of the cross-shaped rotating cylinder 224. One end of the cross-shaped rotating rod 225 receives the rotational power through the cross structure and the cross-shaped rotating cylinder 224. The other end drives the worm gear 214 to rotate through the connecting column 213, transmitting the power to the subsequent transmission components.It can move axially with the cross-shaped rotating drum 224 to facilitate test mode switching and ensure continuous power transmission. A connecting column 213 is fixedly connected to the bottom end of the cross-shaped rotating rod 225, which in turn connects the cross-shaped rotating rod 225 and the worm gear 214. This column transmits the rotational power of the cross-shaped rotating rod 225 to the worm gear 214, ensuring synchronous rotation and providing pre-power for the rotation of the threaded rod 216. It is a key connecting component in the power transmission chain. The worm gear 214 is fixedly connected to the bottom end of the connecting column 213, and rotates with the connecting column 213, driving the worm wheel 215 through meshing. 5. A worm wheel 215 is meshed with the outer wall of the worm 214. The worm wheel 215 meshes with the worm 214, receiving the power transmitted by the worm 214 and driving the threaded rod 216 to rotate synchronously, realizing the conversion of power direction and speed adjustment. This provides stable power for the threaded rod 216 to drive the moving block 217. The threaded rod 216 is fixedly connected to the inner wall of the worm wheel 215. The threaded rod 216 rotates with the worm wheel 215, driving the moving block 217 to slide along the inner wall of the fixed outer shell 211 through the threaded sleeve, converting its own rotational motion into linear sliding of the moving block 217, thus providing power for the pressure block 2. 19. A tensile force is applied to provide power. The outer wall of the threaded rod 216 is threadedly connected to a movable block 217 via a threaded sleeve. The threaded sleeve connects the threaded rod 216 and the movable block 217, converting the rotational power of the threaded rod 216 into the linear movement force of the movable block 217. This ensures that the movable block 217 slides smoothly with the rotation of the threaded rod 216, avoiding transmission jamming that could affect the test results. The movable block 217 slides along the inner wall of the fixed outer shell 211, pushing the pressure block 219 to move via the hinge rod 218, thus converting the power transmitted by the threaded rod 216 into a tensile force on the concrete specimen. The power output for testing the tensile strength of the specimen is achieved by hinged block 219 to the inner wall of movable block 217 via hinge rod 218. Hinged rod 218 connects movable block 217 and pressure block 219, converting the linear sliding of movable block 217 into the clamping and pulling action of pressure block 219. This adapts to the movement trajectory of pressure block 219, ensuring uniform application of tensile force to the concrete specimen and guaranteeing accurate test data. Pressure block 219 directly contacts the concrete specimen and applies tensile force to it under the push of hinge rod 218. By clamping the specimen and transmitting the tensile force, the tensile strength of the concrete is tested.

[0031] Reference Figures 1-3The multi-set testing mechanism 2 also includes a fixed housing 212, which serves as the mounting carrier for the motor 220. It is fixed between the fixed outer shell 211 and the fixed base 1, providing stable support for the motor 220 and ensuring precise alignment between the motor 220's output shaft and the fixed rotating rod 221, thus guaranteeing stable power output. The motor 220 is fixedly connected to the inner wall of the fixed housing 212. As the power source for the multi-set testing mechanism 2, the motor 220, upon startup, drives the fixed rotating rod 221 to rotate, providing core power for the synchronous testing of multiple test pieces. It is the starting point for energy output to achieve batch testing. The motor 220's output shaft... A fixed rotating rod 221 is fixedly connected to the motor 220. The fixed rotating rod 221 receives the rotational power output from the motor 220 and drives the first helical gear 222 to rotate synchronously, transmitting the power from the motor 220 to the second helical gear 223. It is the first connecting component for transmitting power from the motor 220 to the subsequent transmission components, ensuring efficient power transmission. The first helical gear 222 is fixedly connected to the outer wall of the fixed rotating rod 221. The first helical gear 222 rotates with the fixed rotating rod 221 and drives the second helical gear 223 through meshing, converting the lateral rotational power of the fixed rotating rod 221 into the longitudinal rotational power of the second helical gear 223, thus realizing the change in power direction. The rotational power for the cross drum 224 is provided by a helical gear 222. A helical gear 223 meshes with the outer wall of the first helical gear 222, driving the cross drum 224 to rotate synchronously. This is a key component for transmitting power from the motor 220 to the cross drum 224, ensuring continuous power during multiple tests. The inner wall of the second helical gear 223 is fixedly connected to the outer wall of the cross drum 224. The outer wall of the threaded rod 216 is threadedly connected to the inner wall of the threaded sleeve 216. The outer wall of the threaded sleeve 216 is fixedly connected to the inner wall of the moving block 217. The inner wall of the moving block 217 is... The inner wall of the fixed outer shell 211 is slidably connected, both ends of the threaded rod 216 are rotatably connected to the inner wall of the fixed outer shell 211, the outer wall of the cross-shaped rotating cylinder 224 is rotatably connected to the inner wall of the fixed outer shell 211, the outer wall of the connecting column 213 is rotatably connected to the inner wall of the fixed outer shell 211, one end of the hinge rod 218 is hinged to the inner wall of the moving block 217, the other end of the hinge rod 218 is hinged to the inner wall of the pressure block 219, the outer wall of the fixed rotating rod 221 is rotatably connected to the inner wall of the fixed outer shell 211, the outer wall of the fixed shell 212 is fixedly connected to the outer wall of the fixed outer shell 211, and the bottom end of the fixed shell 212 is fixedly connected to the top end of the fixed base 1.

[0032] Reference Figures 1-3The single-unit testing mechanism 3 includes a handwheel 311, which is manually rotated by the operator to drive the threaded rod 312 to rotate, providing power input to the single-unit testing mechanism 3. The test mode can be switched manually, making operation convenient and suitable for the precise control requirements of single-unit testing. The outer wall of the handwheel 311 is rotatably connected to the inner wall of the fixed housing 211. The threaded rod 312 is fixedly connected to the side wall of the handwheel 311. The threaded rod 312 rotates with the handwheel 311, driving the moving block 313 to slide along the inner wall of the fixed housing 211 through the threaded sleeve, converting the rotational power of the handwheel 311 into the linear sliding of the moving block 313, providing power for the moving ring 315 to push the cross-shaped rotating cylinder 224. The outer wall of the threaded rod 312 is threadedly connected to the threaded sleeve. Movable block 313, threaded sleeve 2 connects threaded rod 312 and movable block 313, converting the rotational power of threaded rod 312 into linear movement force of movable block 313, ensuring smooth sliding of movable block 313 as threaded rod 312 rotates, and ensuring accurate mode switching. Movable block 313 slides along the inner wall of fixed shell 211, and pushes movable ring 315 to slide through hinge rod 314, converting the power transmitted by threaded rod 312 into axial thrust of movable ring 315, realizing position adjustment of cross drum 224, and assisting in switching test modes. Movable ring 315 is hinged to the inner wall of movable block 313 through hinge rod 314. Hinge rod 314 connects movable block 313 and movable ring 315, moving movable block 313... The linear sliding of 3 is converted into the axial movement of the moving ring 315, adapting to the motion trajectory of the moving ring 315, ensuring that the moving ring 315 can stably push the cross cylinder 224, realizing the switching of gear meshing state. The moving ring 315 slides along the inner wall of the fixed shell 211, pushing the cross cylinder 224 to move axially, driving the cross rod 225 to move synchronously, realizing the disengagement of helical gear one 222 and helical gear two 223. The inner wall of the moving ring 315 is rotatably connected to the outer wall of the cross cylinder 224, and the outer wall of the moving ring 315 is slidably connected to the inner wall of the fixed shell 211. The outer wall of the moving block two 313 is slidably connected to the inner wall of the fixed shell 211. The outer wall of the threaded rod two 312 is rotatably connected to the inner wall of the fixed shell 211. The inner wall of the cross cylinder 224 is fixedly connected to... Telescopic rod 317 connects the cross cylinder 224 and the cross rod 225, limiting their movement trajectory. The inner rod of telescopic rod 317 is fixedly connected to the outer wall of cross rod 225. The inner wall of cross cylinder 224 is elastically connected to the outer wall of cross rod 225 via spring 316, which provides elastic restoring force. The outer wall of threaded rod 312 is threadedly connected to the inner wall of threaded sleeve 312, which is fixedly connected to the inner wall of movable block 313. One end of hinged rod 314 is hinged to the inner wall of movable block 313, and the other end is hinged to the inner wall of movable ring 315. One end of spring 316 is fixedly connected to the inner wall of cross cylinder 224.The other end of spring 316 is fixedly connected to the outer wall of cross-shaped rotating rod 225.

[0033] Working principle: The motor 220 inside the fixed shell 212 starts, driving the fixed rotating rod 221 to rotate along the inner wall of the fixed shell 211. The fixed rotating rod 221 drives the helical gear 1 222 to mesh with the helical gear 223, causing the cross rotating cylinder 224 to rotate synchronously. The cross rotating cylinder 224 drives the cross rotating rod 225 to rotate through the cross structure. The cross rotating rod 225 drives the worm gear 214 to rotate through the connecting column 213. The worm gear 214 meshes with the worm wheel 215, causing the threaded rod 216 to rotate along the inner wall of the fixed shell 211. The threaded rod 216 drives the moving block 217 to slide through the threaded sleeve 1. The moving block 217 pushes the pressure block 219 to move through the hinge rod 218. The pressure block 219 applies tensile force to the concrete specimen, completing the synchronous tensile strength test of multiple sets of specimens.

[0034] Adjusting the rotating handwheel 311 causes the threaded rod 312 to rotate along the inner wall of the fixed housing 211. The threaded rod 312 drives the sliding block 313 through the threaded sleeve 313. The sliding block 313 pushes the sliding ring 315 through the hinge rod 314. The sliding ring 315 drives the cross drum 224 to move axially. The cross drum 224 drives the cross rod 225 to move synchronously, so that the helical gear 222 and the helical gear 223 disengage, which can realize the testing of a single set of specimens.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A concrete tensile strength testing device for traffic design, comprising a fixed base (1), characterized in that: The fixed base (1) is internally equipped with multiple sets of testing mechanisms (2) and a single set of testing mechanisms (3). The multiple test mechanisms (2) include a fixed outer shell (211), the outer wall of which is fixedly connected to the outer wall of the fixed base (1), a cross cylinder (224) is rotatably connected to the inner wall of the fixed outer shell (211), a cross rod (225) is slidably connected to the inner wall of the cross cylinder (224), a connecting column (213) is fixedly connected to the bottom end of the cross rod (225), a worm gear (214) is fixedly connected to the bottom end of the connecting column (213), a worm wheel (215) is meshed with the outer wall of the worm gear (214), a threaded rod (216) is fixedly connected to the inner wall of the worm wheel (215), a moving block (217) is threadedly connected to the outer wall of the threaded rod (216) through a threaded sleeve, and a pressure block (219) is hinged to the inner wall of the moving block (217) through a hinged rod (218).

2. The concrete tensile strength testing device for traffic design according to claim 1, characterized in that: The multiple test mechanisms (2) also include a fixed shell (212), a motor (220) is fixedly connected to the inner wall of the fixed shell (212), a fixed rotating rod (221) is fixedly connected to the output shaft of the motor (220), a helical gear one (222) is fixedly connected to the outer wall of the fixed rotating rod (221), a helical gear two (223) is meshed with the outer wall of the helical gear one (222), and the inner wall of the helical gear two (223) is fixedly connected to the outer wall of the cross rotating cylinder (224).

3. The concrete tensile strength testing device for traffic design according to claim 1, characterized in that: The outer wall of the threaded rod (216) is threadedly connected to the inner wall of the threaded sleeve, the outer wall of the threaded sleeve is fixedly connected to the inner wall of the moving block (217), the inner wall of the moving block (217) is slidably connected to the inner wall of the fixed shell (211), both ends of the threaded rod (216) are rotatably connected to the inner wall of the fixed shell (211), the outer wall of the cross cylinder (224) is rotatably connected to the inner wall of the fixed shell (211), and the outer wall of the connecting column (213) is rotatably connected to the inner wall of the fixed shell (211).

4. The concrete tensile strength testing device for traffic design according to claim 1, characterized in that: One end of the hinge rod (218) is hinged to the inner wall of the moving block (217), and the other end of the hinge rod (218) is hinged to the inner wall of the pressure block (219).

5. The concrete tensile strength testing device for traffic design according to claim 2, characterized in that: The outer wall of the fixed rotating rod (221) is rotatably connected to the inner wall of the fixed outer shell (211), the outer wall of the fixed shell (212) is fixedly connected to the outer wall of the fixed outer shell (211), and the bottom end of the fixed shell (212) is fixedly connected to the top end of the fixed base (1).

6. The concrete tensile strength testing device for traffic design according to claim 1, characterized in that: The single-unit testing mechanism (3) includes a handwheel (311), the outer wall of which is rotatably connected to the inner wall of the fixed housing (211). A threaded rod (312) is fixedly connected to the side wall of the handwheel (311). A movable block (313) is threadedly connected to the outer wall of the threaded rod (312) via a threaded sleeve. A movable ring (315) is hinged to the inner wall of the movable block (313) via a hinged rod (314). The inner wall of the movable ring (315) is rotatably connected to the outer wall of the cross-shaped rotating cylinder (224). (315) The outer wall is slidably connected to the inner wall of the fixed outer shell (211), the outer wall of the second movable block (313) is slidably connected to the inner wall of the fixed outer shell (211), the outer wall of the second threaded rod (312) is rotatably connected to the inner wall of the fixed outer shell (211), the inner wall of the cross rotating cylinder (224) is fixedly connected to the telescopic rod (317), the inner rod of the telescopic rod (317) is fixedly connected to the outer wall of the cross rotating rod (225), and the inner wall of the cross rotating cylinder (224) is elastically connected to the outer wall of the cross rotating rod (225) through a spring (316).

7. The concrete tensile strength testing device for traffic design according to claim 6, characterized in that: The outer wall of the threaded rod (312) is threadedly connected to the inner wall of the threaded sleeve, the outer wall of the threaded sleeve is fixedly connected to the inner wall of the moving block (313), one end of the hinge rod (314) is hinged to the inner wall of the moving block (313), and the other end of the hinge rod (314) is hinged to the inner wall of the moving ring (315).

8. The concrete tensile strength testing device for traffic design according to claim 6, characterized in that: One end of the spring (316) is fixedly connected to the inner wall of the cross cylinder (224), and the other end of the spring (316) is fixedly connected to the outer wall of the cross rod (225).

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