A device for testing the fatigue strength of perforated plates

Abstract

This application discloses a device for testing the fatigue strength of perforated plates, belonging to the field of fatigue strength testing technology. It mainly includes a body, a load application component mounted on the upper end of the body, and an adjustment component mounted inside the body. The adjustment component includes a first electric guide rail fixedly mounted inside the body, a first support plate on the first electric guide rail, and first support guide rails fixed on both sides of the body. First guide blocks are fixed on both sides of the first support plate, and the first guide blocks are slidably connected to the first support guide rails. This device for testing the fatigue strength of perforated plates, through the built-in first and second electric guide rails, achieves adjustment of the fixture and perforated plate in the longitudinal and transverse directions, avoiding the cumbersome process of manually disassembling and reinstalling the perforated plate fixture required by traditional testing devices, thereby improving testing efficiency.

Description

Technical Field

[0001] This application relates to the field of fatigue strength testing technology, specifically a device for testing the fatigue strength of a perforated plate. Background Technology

[0002] An orifice plate is a thin metal plate with a specific shaped opening installed in a pipe. Its thickness is typically 2mm-8mm. It is one of the core components of differential pressure flow measurement instruments. The opening is usually circular and concentric with the pipe axis. When fluid flows through the orifice plate, because the cross-sectional area of ​​the orifice is smaller than the pipe's cross-sectional area, the fluid accelerates and contracts in front of the orifice plate. The flow rate is indirectly calculated by measuring the pressure difference generated as the fluid flows through the orifice plate. To prevent measurement inaccuracies or equipment damage due to fatigue failure of the orifice plate under long-term alternating loads (pressure fluctuations, thermal stress, etc.), fatigue strength testing equipment is required to perform fatigue strength testing on it.

[0003] When using existing fatigue strength testing equipment, the perforated plate sample to be tested is fixed on the worktable using a special fixture. Strain gauges are attached to the surface of the perforated plate (especially in stress concentration areas such as the edge of the hole). The extension and retraction of the oil cylinder is controlled by a servo hydraulic system to drive the pressure head to apply pressure, thereby applying load and squeezing the perforated plate back and forth. The mechanical strain is converted into an electrical signal by the strain gauge, and the stress change with the load cycle is recorded in real time, thus completing the test of the perforated plate.

[0004] When testing the fatigue strength of orifice plate samples, it is necessary to test the fatigue strength at different positions on the orifice plate sample. Therefore, the position of the orifice plate needs to be adjusted. However, some existing fatigue strength testing devices require the operator to remove the orifice plate clamp from the worktable, place the orifice plate at the position to be tested directly below the pressure head, and then fix the clamp back on the worktable. This repeated adjustment affects the testing efficiency and makes them impractical.

[0005] Therefore, it is necessary to provide a device for testing the fatigue strength of perforated plates to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a perforated plate fatigue strength testing device, which solves the problem that some existing fatigue strength testing devices require operators to manually adjust the position of the perforated plate, resulting in low testing efficiency.

[0008] The technical solution adopted by this application to solve its technical problem is: a perforated plate fatigue strength testing device, including a body; A load-applying assembly is mounted on the upper part of the body; An adjustment assembly is installed inside the machine body. The adjustment assembly includes a first electric guide rail fixedly installed inside the machine body. The first electric guide rail is provided with a first support plate. First support guide rails are fixed on both sides inside the machine body. First guide blocks are fixed on both sides of the first support plate. The first guide blocks are slidably connected to the first support guide rails. The second electric guide rail is mounted on the first support plate. The second electric guide rail is provided with a second support plate. The second support guide rail is fixed at both ends of the first support plate. The second guide block is fixed at both ends of the second support plate. The second guide block is slidably connected to the second support guide rail. A clamping assembly is mounted on the second support plate.

[0009] Furthermore, the load application component includes a support frame fixedly mounted on the machine body, a hydraulic cylinder fixed on the support frame, a pressure plate fixed after the output end of the hydraulic cylinder passes through the support frame, and a pressure head fixed at the lower end of the pressure plate.

[0010] Furthermore, a guide frame is slidably connected to the body, and the lower end of the guide frame is fixedly connected to the pressure plate.

[0011] Furthermore, the clamping assembly includes an annular base fixedly mounted on the upper end of the second support plate. The annular base has a circular groove, and a perforated plate body is provided inside the circular groove. An annular clamping plate is fixed on the annular base for limiting and clamping the perforated plate.

[0012] Furthermore, a rubber pad is fixed to the lower end of the annular clamp.

[0013] Furthermore, a PLC control module is provided at the front end of the machine body.

[0014] Furthermore, mounting frames are fixedly installed on both sides of the front end of the machine body, and warning lights are installed inside the mounting frames.

[0015] The beneficial effects of this application are: the orifice plate fatigue strength testing device provided by this application realizes the adjustment of the fixture and the orifice plate in the longitudinal and transverse directions through the built-in first electric guide rail and second electric guide rail, avoiding the cumbersome process of manually disassembling and reinstalling the orifice plate fixture required by the operator in the traditional testing device, thereby improving the testing efficiency.

[0016] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall schematic diagram of a perforated plate fatigue strength testing device according to this application; Figure 2 This is an internal schematic diagram of a perforated plate fatigue strength testing device according to this application; Figure 3 This is a bottom view schematic diagram of a perforated plate fatigue strength testing device according to this application; Figure 4 This is a schematic diagram of the adjustment assembly and clamping assembly of a perforated plate fatigue strength testing device according to this application; Figure 5 This is a top view schematic diagram of the adjustment assembly and clamping assembly of a perforated plate fatigue strength testing device according to this application; Figure 6 This is a schematic diagram of the overall clamping assembly of a perforated plate fatigue strength testing device according to this application.

[0018] The following are the labeling elements in the figure: 1. Machine body; 2. Load application assembly; 21. Support frame; 22. Hydraulic cylinder; 23. Pressure plate; 24. Pressure head; 25. Guide frame; 3. Adjustment assembly; 31. First electric guide rail; 32. First support plate; 33. First support guide rail; 34. First guide block; 35. Second electric guide rail; 36. Second support plate; 37. Second support guide rail; 38. Second guide block; 4. Clamping assembly; 41. Annular base; 42. Annular clamping plate; 5. PLC control module; 6. Mounting frame; 7. Warning light; 8. Orifice plate body. Detailed Implementation

[0019] 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.

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] like Figure 1-2As shown, this application provides a fatigue strength testing device for perforated plates, including a body 1. The body 1 serves as the basic frame of the entire testing device, and is integrally formed from high-strength alloy steel, possessing good rigidity and stability, and capable of withstanding various stresses generated during the testing process. Four height-adjustable support legs (not shown in the figure) are provided at its lower end, and anti-slip rubber pads (not shown in the figure) are installed on the bottom of the support legs. This not only adapts to different ground environments, ensuring the device is placed stably, but also effectively reduces the impact of vibrations generated during the testing process on the test results. like Figure 2-3 As shown, a load application assembly 2 is provided at the upper end of the machine body 1. The load application assembly 2 includes a support frame 21 fixedly mounted on the machine body 1. A hydraulic cylinder 22 is fixedly mounted at the middle of the upper end of the support frame 21. The load application assembly 2 applies a detection load to the orifice plate. The support frame 21 is welded from high-strength steel and is securely connected to the machine body 1 by multiple high-strength bolts to ensure that there is no displacement or shaking when the hydraulic cylinder 22 is working. The hydraulic cylinder 22 is a servo hydraulic cylinder 22, which is controlled by a servo hydraulic system.

[0022] The output end of the hydraulic cylinder 22 passes through the support frame 21 and is fixedly installed with a pressure plate 23 by bolts. The lower end of the pressure plate 23 is fixedly installed with a pressure head 24 by bolts. The pressure head 24 can be equipped with various specifications according to different testing standards and orifice plate types, such as a flat pressure head 24, a spherical pressure head 24, etc., to meet diverse testing needs. A guide frame 25 is slidably connected to the body 1, and the lower end of the guide frame 25 is fixedly connected to the pressure plate 23. The lower end of the guide frame 25 is firmly connected to the pressure plate 23 by welding, ensuring that the pressure plate 23 always maintains vertical movement during the load loading process, and avoiding inaccurate test results due to tilting. like Figure 4-5 As shown, the machine body 1 is equipped with an adjustment component 3. The adjustment component 3 includes a first electric guide rail 31 fixedly installed inside the machine body 1. A first support plate 32 is slidably installed on the first electric guide rail 31. The first electric guide rail 31 is driven by a ball screw (not shown in the figure). The screw is threadedly connected to the threaded block (not shown in the figure) at the lower end of the first support plate 32, which can realize the adjustment of the first support plate 32 in the longitudinal direction.

[0023] Both sides of the body 1 are fixedly installed with first support rails 33, and both sides of the lower end of the first support plate 32 are fixedly installed with first guide blocks 34. The first guide blocks 34 and the first support rails 33 are fitted with clearance, which can effectively limit the lateral displacement of the first support plate 32 and support the first support plate 32. A second electric guide rail 35 is fixedly installed on the upper end of the first support plate 32. The second electric guide rail 35 has the same structure as the first electric guide rail 31 and can realize the adjustment of the second support plate 36 in the lateral direction. A second support guide rail 37 is fixedly installed on both ends of the first support plate 32, and a second guide block 38 is fixedly installed on both ends of the second support plate 36. The cooperation between the second guide block 38 and the second support guide rail 37 is the same as that between the first guide block 34 and the first support guide rail 33. Through the coordinated work of the first electric guide rail 31 and the second electric guide rail 35, the position to be detected on the orifice plate can be adjusted to be directly below the pressure head 24, ensuring convenient detection. like Figure 6 As shown, a clamping assembly 4 is provided on the second support plate 36. The clamping assembly 4 includes an annular base 41 fixedly installed on the upper end of the second support plate 36. The annular base 41 is made of high-strength aluminum alloy material and has the characteristics of light weight and high strength. A circular groove (not shown in the figure) is provided on the annular base 41, and a perforated plate body 8 is provided inside the circular groove. Strain gauges (not shown in the figure) are attached to the locations to be tested on the orifice plate. The strain gauges adopt advanced strain gauge technology and have the characteristics of high sensitivity and fast response speed. They can detect the stress changes of the orifice plate during the force process and transmit the data to the PLC control module 5. An annular clamping plate 42 is fixedly installed on the annular base 41 by bolts. In order to further enhance the clamping force on the orifice plate, a rubber pad (not marked in the figure) is fixed to the lower end of the annular clamping plate 42. The surface of the rubber pad is specially treated and has good anti-slip performance. It can fit tightly with the edge of the orifice plate to ensure that the orifice plate will not slide during the testing process.

[0024] like Figure 1 As shown, a PLC control module 5 is installed at the front end of the machine body 1. The PLC control module 5 adopts a high-performance industrial-grade programmable logic controller, which has powerful data processing and logic control capabilities. It is used to control the pressure output of the hydraulic cylinder 22 and the movement of the first electric guide rail 31 and the second electric guide rail 35, so as to realize the automated control of the entire detection process.

[0025] Mounting frames 6 are fixedly installed on both sides of the front end of the main body 1. Warning lights 7 are installed inside the mounting frames 6. The warning lights 7 adopt a red and yellow dual-color design. When the equipment is in standby mode, the warning light 7 is solid yellow. When the equipment starts working, the warning light 7 turns red and flashes, reminding the surrounding personnel that the equipment is in working condition.

[0026] Working principle: The operator places the orifice plate body 8 to be tested into the circular groove of the annular base 41, and uses the annular clamping plate 42 and the rubber pad at the lower end to firmly clamp the orifice plate to prevent it from sliding during the testing process. Based on the position to be detected on the orifice plate, the first electric guide rail 31, driven by a ball screw, moves the first support plate 32 longitudinally; simultaneously, the second electric guide rail 35, using the same structural principle, moves the second support plate 36 laterally. The cooperation between the first guide block 34 and the first support guide rail 33, and the second guide block 38 and the second support guide rail 37, restricts the lateral displacement of the support plate, ensuring the stability and accuracy of the movement. Through the coordinated work of the first and second electric guide rails, the position to be detected on the orifice plate is adjusted to be directly below the pressure head 24. The PLC control module 5 controls the servo hydraulic cylinder 22 to start. The output end of the hydraulic cylinder 22 pushes the pressure plate 23 and the pressure head 24 downward, which can apply a load to the strain gauges attached to the perforated plate. The guide frame 25 is firmly welded to the pressure plate 23 to ensure that the pressure plate 23 moves vertically during the load application process, thus ensuring the accuracy of the test results. The strain gauges attached to the test position on the perforated plate use strain gauge technology to detect the stress changes of the perforated plate in real time during the stress process, and transmit the data to the PLC control module 5. During equipment operation, the warning light 7 inside the mounting frame 6 displays the equipment status in real time. It is solid yellow when in standby mode and flashes red when in operation to remind people around to pay attention to safety.

[0027] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An orifice plate fatigue strength detection device, characterized by: include Body (1); A load application component (2) is mounted on the upper end of the body (1); An adjustment component (3) is installed inside the body (1). The adjustment component (3) includes a first electric guide rail (31) fixedly installed inside the body (1). The first electric guide rail (31) is provided with a first support plate (32). First support guide rails (33) are fixed on both sides inside the body (1). First guide blocks (34) are fixed on both sides of the first support plate (32). The first guide blocks (34) are slidably connected to the first support guide rails (33). The second electric guide rail (35) is mounted on the first support plate (32). The second electric guide rail (35) is provided with a second support plate (36). The first support plate (32) is fixed with a second support guide rail (37) at both ends. The second support plate (36) is fixed with a second guide block (38) at both ends. The second guide block (38) is slidably connected to the second support guide rail (37). The clamping assembly (4) is mounted on the second support plate (36).

2. The device for detecting fatigue strength of a well plate according to claim 1, wherein: The load application component (2) includes a support frame (21) fixedly installed on the body (1), a hydraulic cylinder (22) fixed on the support frame (21), a pressure plate (23) fixed after the output end of the hydraulic cylinder (22) passes through the support frame (21), and a pressure head (24) is fixed at the lower end of the pressure plate (23).

3. The device for detecting fatigue strength of a well plate according to claim 2, wherein: A guide frame (25) is slidably connected to the body (1), and the lower end of the guide frame (25) is fixedly connected to the pressure plate (23).

4. The device for detecting fatigue strength of a well plate according to claim 1, wherein: The clamping assembly (4) includes an annular base (41) fixedly installed on the upper end of the second support plate (36). The annular base (41) is provided with a circular groove, and a perforated plate body (8) is provided inside the circular groove. An annular clamping plate (42) is fixed on the annular base (41) for limiting and clamping the perforated plate.

5. The device for detecting fatigue strength of a well plate according to claim 4, wherein: The lower end of the annular clamp (42) is fixed with a rubber pad.

6. The device for detecting fatigue strength of a well plate according to claim 1, wherein: The front end of the machine body (1) is equipped with a PLC control module (5).

7. The orifice plate fatigue strength testing device according to claim 6, characterized in that: The front sides of the body (1) are fixedly installed with mounting frames (6), and warning lights (7) are installed inside the mounting frames (6).

Images