Pressure sensor fixing structure for concrete test piece

Abstract

The utility model relates to the civil engineering test technical field discloses a pressure sensor fixing structure for concrete test piece, including work table, the outside of work table is provided with protection institution, the outside of work table is provided with fixed establishment, the outside fixed connection of work table has stabilizing mechanism, the fixed establishment includes fixed plate no.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering testing technology, and in particular to a pressure sensor fixing structure for concrete specimens. Background Technology

[0002] In the context of the booming development of modern civil engineering construction, the accurate testing of the mechanical properties of concrete, as a core building material, is crucial. Pressure sensors, as key equipment for acquiring stress data from concrete specimens, have their fixing structure design directly affecting the reliability and accuracy of test results. With infrastructure construction moving towards super high-rise and large-span structures, and the widespread application of new materials such as high-performance concrete and self-compacting concrete, higher demands are placed on the accuracy, stability, and adaptability of pressure sensor fixing structures.

[0003] Currently, the fixing techniques for pressure sensors on concrete specimens mostly employ mechanical clamping and adhesive bonding. Mechanical clamping structures typically use bolts, clamps, or other components to fix the sensor to the specimen surface, with the clamping achieved by adjusting the bolt tightness. Adhesive bonding uses high-strength adhesives to directly attach the sensor to the specimen surface or into a pre-embedded groove. Both methods are relatively simple to operate and can meet some routine testing needs.

[0004] In existing technologies, some mechanical clamping structures are affected by factors such as bolt tightness and clamp material aging. During long-term monitoring or high-frequency vibration tests, the sensors are prone to loosening or shifting, resulting in data acquisition distortion. This seriously restricts the accuracy and reliability of concrete mechanical property testing. Therefore, a pressure sensor fixing structure for concrete specimens is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pressure sensor fixing structure for concrete specimens, aiming to improve the stability of some devices in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pressure sensor fixing structure for concrete specimens includes a workbench, a protective mechanism and a fixing mechanism on the outside of the workbench, and a stabilizing mechanism fixedly connected to the outside of the workbench. The fixing mechanism includes a fixing plate 1, which is fixedly connected to the outside of the workbench. A motor 2 is fixedly connected to the outside of the fixing plate 1, and a transmission wheel is fixedly connected to the drive end of the motor 2. A transmission assembly is provided on the outside of the fixing plate 1.

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

[0009] The stabilizing mechanism includes a connecting block, which is fixedly connected to the outside of the workbench. A motor is fixedly connected inside the connecting block, and a transmission link is fixedly connected to the drive end of the motor.

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

[0011] The transmission assembly includes a transmission ring, the outer side of which is rotatably connected to the outside of the fixed plate, and the outer teeth of the transmission ring mesh with the outer teeth of the transmission wheel.

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

[0013] A fixing post is fixedly connected to the outside of the fixing plate one, and a fixing plate two is rotatably connected to the outside of the fixing post. The external locking teeth of the fixing plate two are engaged with the external locking teeth of the transmission ring.

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

[0015] A pressure sensor is slidably connected to the outside of the second fixed plate, the transmission wheel is rotatably connected to the outside of the first fixed plate, and a limit post is fixedly connected to the outside of the first fixed plate.

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

[0017] The transmission link 2 is rotatably connected to the transmission link 1 on both sides inside. The other end of the transmission link 1 is rotatably connected to the limit plate 1. The worktable is fixedly connected to the outside of the worktable. The connecting block is fixedly connected to the outside of the connecting link 1. The limit plate 1 is slidably connected to the outside of the connecting link 1. The motor 1 is fixedly connected to the outside of the motor 1. The limit plate 2 is fixedly connected to the outside of the connecting link 1.

[0018] As a further description of the above technical solution:

[0019] The protective mechanism includes a slide, the slide being fixedly connected to the outside of the workbench, a baffle being slidably connected inside the slide, two pull pins being fixedly connected to the top of the baffle, a locking pin being fixedly connected to the outside of the baffle, a fixing buckle being fixedly connected to the outside of the baffle, and the fixing buckle being slidably connected to the outside of the slide.

[0020] As a further description of the above technical solution:

[0021] The top of the workbench is fixedly connected to four support columns, the top of the support columns is fixedly connected to a support plate, the outside of the support plate is fixedly connected to a limit ring, the inside of the limit ring is fixedly connected to a cylinder, and the drive end of the cylinder is fixedly connected to a pressing column.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the automatic and precise positioning and installation of the pressure sensor is achieved through the multi-stage linkage of the drive wheel, drive ring and fixing plate 2 driven by motor 2. Compared with the traditional manual fixing method, it effectively improves the installation efficiency and position accuracy, reduces human operation error, and the rotary transmission structure can flexibly adapt to the sensor installation requirements of specimens of different sizes, expand the applicability of the equipment, and ensure the stability of the fixing process through mechanical transmission, ensuring that the pressure sensor can reliably collect data in the test, providing accurate and efficient technical support for concrete mechanical property testing.

[0024] 2. In this utility model, the transmission linkage driven by the motor drives the first transmission linkage to move the first limiting plate on the slide bar. This, in conjunction with the second limiting plate, achieves multi-directional limiting and fixing of the concrete specimen. Compared with the traditional single-point fixing method, this structure can adapt to specimens of different sizes, quickly complete accurate positioning, effectively avoid displacement and offset of the specimen due to force during the test, significantly improve the accuracy and repeatability of test data, and ensure the reliability of the fixing effect through the stability of the mechanical transmission, providing a stable specimen fixing environment for pressure testing. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the pressure sensor fixing structure for concrete specimens proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the connecting block for fixing a pressure sensor on a concrete specimen, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the transmission link one of the pressure sensor fixing structure for concrete specimens proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the column structure for fixing a pressure sensor on a concrete specimen, as proposed in this utility model.

[0029] Legend:

[0030] 1. Workbench; 2. Support column; 3. Support plate; 4. Protective mechanism; 41. Baffle; 42. Slide groove; 43. Fixing buckle; 44. Pull-out column; 45. Locking column; 5. Stabilizing mechanism; 51. Connecting block; 52. Slide bar; 53. Limiting plate one; 54. Motor one; 55. Transmission link one; 56. Limiting plate two; 57. Transmission link two; 58. Connecting column; 6. Fixing mechanism; 61. Pressure sensor; 62. Fixing plate one; 63. Motor two; 64. Transmission wheel; 65. Transmission assembly; 651. Transmission ring; 652. Fixing column; 653. Fixing plate two; 654. Limiting column; 7. Pressing column; 8. Cylinder; 9. Limiting and fixing ring. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1 to 3 This utility model provides an embodiment of a pressure sensor fixing structure for concrete specimens, including a workbench 1. The workbench 1 provides a stable installation platform for the concrete specimen, pressure sensor, and other functional structures. A protective mechanism 4 is provided on the outside of the workbench 1. The protective mechanism 4 is used to block splashed concrete debris and fragments during the pressure test of the concrete specimen to prevent them from causing injury to the operator. A fixing mechanism 6 is provided on the outside of the workbench 1. The fixing mechanism 6 is used to realize the automated and accurate positioning and installation of the pressure sensor. Mechanical transmission replaces manual operation, improving installation efficiency and accuracy. A stabilizing mechanism 5 is fixedly connected to the outside of the workbench 1. The stabilizing mechanism 5 is responsible for stabilizing and limiting the concrete specimen before the test to prevent the specimen from shifting or tilting during the pressure test.

[0033] The fixing mechanism 6 includes a fixing plate 62, which provides a mounting carrier for the motor 63 and the transmission assembly 65. Its rigid structure ensures stable force transmission during the transmission process. The fixing plate 62 is externally fixed to the outside of the worktable 1. The motor 63 is externally fixed to the fixing plate 62. The motor 63 drives the transmission wheel 64 to rotate by outputting a stable torque, providing power for the positioning and installation of the pressure sensor. The drive end of the motor 63 is fixedly connected to the transmission wheel 64, which is used to transmit the rotational power of the motor 63 to the transmission ring 651. The external of the fixing plate 62 is provided with a transmission assembly 65, which is used to transmit and convert the power of the motor through a multi-stage transmission structure to realize the precise movement and positioning of the pressure sensor.

[0034] The transmission assembly 65 includes a transmission ring 651, which engages with the teeth of the transmission wheel 64 and the second fixed plate 653 to convert the rotational motion of the transmission wheel 64 into its own circular motion. The outer side of the transmission ring 651 is rotatably connected to the outside of the first fixed plate 62, and the outer teeth of the transmission ring 651 engage with the outer teeth of the transmission wheel 64. A fixed post 652 is fixedly connected to the outside of the first fixed plate 62, providing a rotational support point for the second fixed plate 653, ensuring that the second fixed plate 653 can rotate stably and flexibly under the drive of the transmission ring 651. The second fixed plate 653 is rotatably connected to the outside of the fixed post 652, and the second fixed plate 653 is used for... Driven by the transmission ring 651, the pressure sensor rotates along a predetermined trajectory. The external teeth of the fixed plate 653 mesh with the external teeth of the transmission ring 651. The external slidable connection of the fixed plate 653 is a pressure sensor 61, which is used to monitor the pressure change of the concrete specimen in real time during the compression process and convert the pressure signal into an electrical signal output. The external rotatable connection of the transmission wheel 64 is to the outside of the fixed plate 62. The limiting post 654 is used to limit the movement range of the fixed plate 653 and the pressure sensor to prevent them from exceeding the predetermined position during transmission. The limiting post 654 is fixedly connected to the outside of the fixed plate 62.

[0035] Reference Figure 1 , Figure 3 and Figure 4The stabilizing mechanism 5 includes a connecting block 51, which connects the stabilizing mechanism 5 to the workbench 1. The connecting block 51 is externally fixed to the outside of the workbench 1, and a motor 54 is fixedly connected inside the connecting block 51. The motor 54 drives the transmission link 57 to rotate, thereby moving the limiting plate 53 and the limiting plate 56 to achieve automatic limiting and fixing of the concrete specimen. The driving end of the motor 54 is fixedly connected to the transmission link 57, which converts the rotational motion of the motor 54 into linear motion or oscillation. It is connected to the transmission link 55, and the transmission link 55 is rotatably connected to both sides inside the transmission link 57. The transmission link 55 moves under the drive of the transmission link 57, transmitting force to the limiting plate 53, causing the limiting plate 56 to move. 3. Slide on slide bar 52. The other end of transmission link 55 is rotatably connected to limit plate 53. Limit plate 53 is used to directly contact the concrete specimen. Under the drive of transmission link 55, slide along slide bar 52. Slide bar 52 is fixedly connected to the outside of worktable 1. Slide bar 52 is fixedly connected to the outside of connecting block 51. Slide bar 52 is used to provide a guide track for the sliding of limit plate 53, ensuring that limit plate 53 maintains linear motion during movement. Limit plate 53 is slidably connected to the outside of slide bar 52. Connecting column 58 is fixedly connected to the outside of motor 54. Connecting column 58 is used to fix limit plate 56 and transmit the power of motor 54 to limit plate 56 so that it cooperates with limit plate 53. Limit plate 56 is fixedly connected to the outside of connecting column 58.

[0036] The protective mechanism 4 includes a slide 42, which provides a track for the sliding of the baffle 41, allowing the baffle 41 to move flexibly outside the workbench 1, thus enabling the protective mechanism 4 to be deployed and retracted. The slide 42 is externally fixedly connected to the outside of the workbench 1. During the test, the baffle 41 blocks concrete debris from splashing, protecting the safety of operators and equipment. The baffle 41 is slidably connected inside the slide 42. Two pull columns 44 are fixedly connected to the top of the baffle 41. The pull columns 44 facilitate the operator to pull the baffle 41 and make it slide inside the slide 42. The baffle 41 is externally fixedly connected to a locking column 45, which is used to lock the baffle 41 onto the slide 42 after it has moved to the appropriate position, preventing the baffle 41 from shifting due to vibration or other reasons during the test. The baffle 41 is externally fixedly connected to a fixing buckle 43, which assists the locking column 45 in fixing the baffle 41. The fixing buckle 43 is externally slidably connected to the outside of the slide 42.

[0037] Four support columns 2 are fixedly connected to the top of the workbench 1. The support columns 2 are used to connect the workbench 1 to the support plate 3 to form a stable frame structure to bear the pressure on the specimen and the weight of other components during the test. The support plate 3 is fixedly connected to the top of the support columns 2. The support plate 3 provides an installation platform for the cylinder 8. The external of the support plate 3 is fixedly connected to a limiting ring 9. The limiting ring 9 is used to limit and fix the cylinder 8 to ensure that the cylinder 8 remains vertical during operation, so that the pressing column 7 can accurately apply pressure to the concrete specimen. The cylinder 8 is fixedly connected inside the limiting ring 9. The driving end of the cylinder 8 is fixedly connected to the pressing column 7. The pressing column 7 is used to directly contact the concrete specimen and transmit the thrust of the cylinder 8 to the specimen.

[0038] Working principle: The concrete specimen is placed on the workbench 1. If the test environment requires protection, the baffle 41 is pulled. The protective mechanism 4 is unfolded by sliding the baffle 41 in the slide groove 42. The position is adjusted by sliding the fixing buckle 43 on the slide groove 42. When the baffle 41 reaches the appropriate position, it is locked by locking column 45 to achieve protection of the test area and prevent concrete debris from splashing during the test, which may affect the safety of the operator and equipment. The pull column 44 makes it easier for the operator to pull the baffle 41, making the operation more convenient.

[0039] Motor 1 54 drives transmission link 2 57 to rotate. Transmission link 1 55, which is rotatably connected to both sides inside transmission link 2 57, moves with the rotation of transmission link 2 57. The other end of transmission link 1 55 drives limiting plate 1 53 to slide on slide bar 52. Limiting plate 1 53 and limiting plate 2 56 limit and fix the concrete specimen from different directions to prevent the specimen from displacing during subsequent tests and ensure the accuracy and stability of the test.

[0040] Motor 63 drives transmission wheel 64 to rotate. When transmission wheel 64 rotates, transmission ring 651 starts to rotate outside fixed plate 62. During the rotation of transmission ring 651, fixed plate 653 rotates under the support of fixed column 652. Fixed plate 653 rotates around fixed column 652, causing pressure sensor 61 to slide along the sliding track outside fixed plate 653, ensuring that pressure sensor is accurately installed at the corresponding position of the specimen, and realizing accurate measurement of specimen pressure.

[0041] After the pressure sensor is installed and fixed, and the specimen is also fixed by the stabilizing mechanism 5, the cylinder 8 inside the external limiting and fixing ring 9 of the support plate 3 is activated. The driving end of the cylinder 8 drives the downward pressure column 7 to move downward, applying pressure to the concrete specimen and starting the pressure test.

[0042] 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 pressure sensor fixing structure for concrete specimens, comprising a workbench (1), characterized in that: The workbench (1) is provided with a protective mechanism (4), a fixing mechanism (6) is provided on the outside of the workbench (1), and a stabilizing mechanism (5) is fixedly connected to the outside of the workbench (1). The fixing mechanism (6) includes a fixing plate (62), which is fixedly connected to the outside of the workbench (1). A motor (63) is fixedly connected to the outside of the fixing plate (62). A transmission wheel (64) is fixedly connected to the drive end of the motor (63). A transmission assembly (65) is provided on the outside of the fixing plate (62).

2. The pressure sensor fixing structure for concrete specimens according to claim 1, characterized in that: The stabilizing mechanism (5) includes a connecting block (51), which is fixedly connected to the outside of the workbench (1). A motor (54) is fixedly connected inside the connecting block (51), and a transmission link (57) is fixedly connected to the drive end of the motor (54).

3. The pressure sensor fixing structure for concrete specimens according to claim 1, characterized in that: The transmission assembly (65) includes a transmission ring (651), which is rotatably connected to the outside of the fixed plate (62), and the external teeth of the transmission ring (651) mesh with the external teeth of the transmission wheel (64).

4. The pressure sensor fixing structure for concrete specimens according to claim 3, characterized in that: The fixed plate one (62) is fixedly connected to the outside of a fixed column (652), and the fixed column (652) is rotatably connected to the outside of a fixed plate two (653). The external teeth of the fixed plate two (653) are engaged with the external teeth of the transmission ring (651).

5. The pressure sensor fixing structure for concrete specimens according to claim 4, characterized in that: A pressure sensor (61) is slidably connected to the outside of the second fixed plate (653), the transmission wheel (64) is rotatably connected to the outside of the first fixed plate (62), and a limit post (654) is fixedly connected to the outside of the first fixed plate (62).

6. The pressure sensor fixing structure for concrete specimens according to claim 2, characterized in that: The transmission link 2 (57) is rotatably connected to the two sides of the transmission link 1 (55), and the other end of the transmission link 1 (55) is rotatably connected to the limit plate 1 (53). The worktable (1) is fixedly connected to the outside of the slide bar (52), the connecting block (51) is fixedly connected to the outside of the slide bar (52), the limit plate 1 (53) is slidably connected to the outside of the slide bar (52), the motor 1 (54) is fixedly connected to the outside of the connecting column (58), and the limit plate 2 (56) is fixedly connected to the outside of the connecting column (58).

7. The pressure sensor fixing structure for concrete specimens according to claim 1, characterized in that: The protective mechanism (4) includes a slide (42), which is fixedly connected to the outside of the workbench (1). A baffle (41) is slidably connected inside the slide (42). Two pull columns (44) are fixedly connected to the top of the baffle (41). A locking column (45) is fixedly connected to the outside of the baffle (41). A fixing buckle (43) is fixedly connected to the outside of the baffle (41). The fixing buckle (43) is slidably connected to the outside of the slide (42).

8. The pressure sensor fixing structure for concrete specimens according to claim 1, characterized in that: The top of the workbench (1) is fixedly connected to four support columns (2), the top of the support columns (2) is fixedly connected to a support plate (3), the outside of the support plate (3) is fixedly connected to a limit fixing ring (9), the inside of the limit fixing ring (9) is fixedly connected to a cylinder (8), and the drive end of the cylinder (8) is fixedly connected to a pressing column (7).

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