A water pump blade hardness detection device

Abstract

The application discloses a water pump blade hardness detection device, belongs to the water pump blade detection technical field, and includes a quick positioning detection mechanism and a hardness tester, wherein the hardness tester is installed in the quick positioning detection mechanism; the quick positioning detection mechanism includes a first rotating mechanism, a fixing frame, a second rotating mechanism, an arc-shaped plate and an adjustable clamping detection mechanism; the fixing frame is arranged on the first rotating mechanism; the fixing frame is arranged in a U shape; a sliding guide assembly is arranged in the fixing frame; the arc-shaped plate is slidably arranged in the sliding guide assembly; the second rotating mechanism is arranged in the fixing frame; an arc-shaped tooth section is coaxially and fixedly connected to the outer side of the arc-shaped plate; the arc-shaped plate is in transmission connection with the second rotating mechanism through the arc-shaped tooth section; and the adjustable clamping detection mechanism is arranged on the inner side of the arc-shaped plate along the radial direction. The water pump blade hardness detection device can quickly and accurately realize the normal alignment of the hardness tester and the measured curved surface.

Description

Technical Field

[0001] This invention belongs to the field of water pump blade testing technology, specifically referring to a water pump blade hardness testing device. Background Technology

[0002] As a core working component of fluid transport equipment, the pump impeller's blades continuously withstand media erosion, cavitation, and alternating loads during high-speed rotation. The hardness of the blades directly determines the impeller's wear resistance, deformation resistance, and overall service life. Hardness testing is a mandatory procedure in impeller manufacturing, heat treatment, and finished product acceptance, and is crucial for ensuring the stability and reliability of the pump unit's operation.

[0003] Blades are mostly curved surfaces, and the surface normal direction varies at different testing positions. Hardness testing requires the hardness tester to be pressed perpendicular to the surface being tested. Existing testing methods rely on manual hand-holding or simple adjustments, making it difficult to quickly and accurately align the hardness tester with the normal direction of the surface being tested. This easily leads to problems such as skewness and poor fit. If vertical alignment cannot be guaranteed, it will result in distorted test data, large dispersion of hardness values, and an inability to truly reflect the performance of the blade material. At the same time, skewed forces can easily damage the hardness tester and reduce the service life of the testing equipment. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a pump blade hardness testing device that can quickly and accurately align the hardness tester with the normal of the surface being tested.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a pump blade hardness testing device, including a rapid positioning testing mechanism and a hardness tester. The hardness tester is installed in the rapid positioning testing mechanism and is an ultrasonic hardness tester. The rapid positioning testing mechanism includes a first rotating mechanism, a fixed frame, a second rotating mechanism, an arc-shaped plate, and an adjustable clamping testing mechanism. The fixed frame is mounted on the first rotating mechanism and is U-shaped. A sliding guide assembly is provided inside the fixed frame. The arc-shaped plate is slidably mounted in the sliding guide assembly. The second rotating mechanism is located inside the fixed frame. An arc-shaped toothed segment is coaxially fixed to the outer side of the arc-shaped plate. The arc-shaped plate is connected to the second rotating mechanism through the arc-shaped toothed segment. The adjustable clamping testing mechanism is radially located on the inner side of the arc-shaped plate.

[0006] Furthermore, the adjustable clamping and detection mechanism includes a clamping shell, a clamping assembly, and a detection assembly. One end of the concave arc surface of the arc plate is provided with a mounting groove adapted to the clamping shell. The clamping shell is detachably installed in the mounting groove by means of a threaded connection to achieve quick assembly and disassembly of the clamping shell. A pressure sensor is provided between the arc plate and the mounting groove. The detection assembly is located at the end of the clamping shell away from the mounting groove. The detection assembly is evenly distributed in a circumferential array around the axis of the clamping shell. The clamping shell has a hollow structure that runs through the front and back. The clamping openings are equidistantly provided in the middle of the clamping shell along the circumference. The clamping assembly is located in the middle of the clamping shell and extends into the clamping shell through the clamping openings. By adjusting the clamping assembly, stable clamping of hardness testers of different sizes can be achieved.

[0007] The detection assembly includes a bent rod, a straight rod, a spring, a detection sleeve, and a positioning pressure sensor. The bent rod is located at the end of the clamping housing and extends from the side wall of the clamping housing towards the axis of the clamping housing. The straight rod is fixedly located at the end of the bent rod and integrally formed with the bent rod. The detection sleeve is slidably located on the outside of the end of the straight rod away from the bent rod. The end of the bent rod is provided with a limiting ring. The spring is sleeved on the outside of the straight rod and is located between the limiting ring and the detection sleeve, serving as a buffer and reset function. The positioning pressure sensor is located on the side of the limiting ring near the spring and is used to monitor the pressure signal generated when the detection sleeve contacts the blade.

[0008] More specifically, the clamping assembly includes an elastic clamping part and a clamping sliding sleeve. One end of the elastic clamping part is fixedly installed on the side wall of the clamping opening, and the other end of the elastic clamping part passes through the clamping opening and extends obliquely in the direction of the clamping housing axis. The cross-section of the elastic clamping part is arc-shaped. A flexible clamping part is provided at the end of the elastic clamping part near the clamping housing axis. The elastic clamping part is made of elastic metal and is arranged in a circular array around the clamping housing. Multiple elastic clamping parts together form a conical cavity for accommodating the hardness tester. A protruding triangular pushing part is provided on the outer side of the elastic clamping part along the axial direction. The clamping housing has external threads on its side wall, and the clamping sleeve is slidably fitted on the outside of the clamping housing. The inner wall of the clamping sleeve has internal threads that mesh with the external threads, thus forming a threaded transmission fit with the clamping housing. By screwing the clamping sleeve, the clamping sleeve can be moved axially along the clamping housing. When the clamping sleeve approaches the triangular pushing part, it will apply a radial thrust to the triangular pushing part, thereby forcing the free end of the elastic clamping part to bend in the direction of the axis of the clamping housing. By adjusting the position of the clamping sleeve, the degree of bending of the elastic clamping part can be flexibly controlled, thus facilitating the quick and stable clamping and fixing of hardness testers of different sizes.

[0009] Preferably, the outer diameter of the triangular pusher is gradually varied along the axial direction. The radial length from the end of the triangular pusher away from the detection component to the axis of the clamping housing is greater than the radial length from the end of the triangular pusher near the detection component to the axis of the clamping housing. The clamping sleeve is located on the side of the clamping opening near the detection component. When the clamping sleeve is rotated and moved away from the detection component, the inner wall of the clamping sleeve contacts the inclined surface of the triangular pusher and gradually applies pressure, thereby smoothly driving the elastic clamping part to bend in the axial direction to achieve uniform clamping of the hardness tester.

[0010] Furthermore, the sliding guide assembly includes two rows of guide rollers distributed along the arc, which are symmetrically arranged on two opposite inner walls of the fixed frame. The two rows of guide rollers are located on the inner and outer sides of the arc plate, respectively, to limit and support the sliding path of the arc plate, thereby ensuring the smoothness of the arc plate's movement and the guiding accuracy during the sliding process.

[0011] As a further improvement to this solution, the fixed frame is provided with symmetrical arc-shaped through holes on both sides. The arc-shaped through holes extend from the edge of the fixed frame to the center of the fixed frame. The arc-shaped through holes are coaxially arranged with the arc plate. The two ends of the arc plate are provided with limiting sliders that are adapted to the arc-shaped through holes.

[0012] More specifically, the first rotating mechanism includes a mounting frame and a first rotating motor. The first rotating motor is fixedly mounted on the mounting frame, and a rotating shaft is rotatably mounted on the mounting frame. The fixed frame is rotatably mounted at one end of the mounting frame. The output end of the first rotating motor is connected to the rotating shaft. The rotating shaft is connected to the fixed frame and drives the fixed frame to rotate. The axis of the rotating shaft is perpendicular to and intersects the axis of the arc-shaped plate.

[0013] As a further improvement to this solution, a limiting cover is installed at the end of the clamping shell away from the arc plate via a threaded connection. A positioning ring is provided at the end of the clamping shell near the detection component. The limiting cover is used to axially limit the detection end of the hardness tester. When the detection end of the hardness tester is in close contact with the inner wall of the limiting cover during installation, the detection end of the hardness tester is precisely positioned at the spatial intersection of the axis of the arc plate and the axis of the rotating shaft. Through the limiting cover, quick and accurate positioning can be achieved when changing or installing the hardness tester, ensuring that the detection point of the hardness tester is located in the preset standard position during each test, thereby improving the repeatability and accuracy of the test results.

[0014] The second rotating mechanism includes a second rotating motor and a drive gear. The drive gear is rotatably mounted inside the fixed frame, and the second rotating motor is mounted on the side wall of the fixed frame. The output end of the second rotating motor is coaxially fixed to the drive gear. The drive gear meshes with an arc-shaped tooth segment. The second rotating motor drives the drive gear to transmit power, and the drive gear drives the arc plate to rotate around its own axis through the arc-shaped tooth segment.

[0015] Preferably, the end of the clamping housing away from the detection component is provided with an avoidance slot, which facilitates the placement of cables.

[0016] Preferably, the mounting bracket is equipped with a microcontroller, and the side wall of the mounting bracket is equipped with a display screen and a buzzer. The microcontroller is electrically connected to the display screen, the buzzer, the pressing pressure sensor, and each positioning pressure sensor. The microcontroller can receive the pressure signals collected by the pressing pressure sensor and the positioning pressure sensor in real time and process the data.

[0017] As a further improvement to this solution, the side wall of the mounting bracket is provided with a gripping part, and the gripping part is provided with a control button.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Through the multi-directional adjustment of the first and second rotating mechanisms, combined with the precise feedback of the positioning pressure sensor, the hardness tester and the curved surface of the water pump blade are precisely aligned in the normal direction, avoiding problems such as skewing and poor fit. This allows the hardness tester to be pressed vertically into the surface being tested, which meets the industry standard for hardness testing. The test data is undistorted, the dispersion of hardness values ​​is greatly reduced, and it can truly reflect the hardness performance of the blade material.

[0019] 2. The first rotating mechanism drives the fixed frame to rotate around the rotating shaft, and the second rotating mechanism drives the arc plate to rotate around its own axis through the drive gear and arc-shaped tooth segment transmission. The axis of the rotating shaft intersects perpendicularly with the axis of the arc plate. The intersection point is the contact point between the hardness tester's testing end and the blade, realizing multi-directional rotation adjustment of the hardness tester around the contact point. From the mechanical structure, it ensures the possibility of normal alignment adjustment, stable operation, and precise adjustment.

[0020] 3. The positioning pressure sensors distributed in a circular array of the detection components collect pressure values ​​in real time. The microcontroller determines whether the hardness tester is aligned with the normal direction of the curved surface by judging whether the pressure values ​​of each sensor are equal. When the normal direction is aligned, the pressure of the hardness tester on the blade is evenly transmitted to each detection sleeve, and the pressure values ​​of each positioning pressure sensor are consistent.

[0021] 4. By rotating the threaded drive of the clamping sleeve, the triangular pusher of the elastic clamping part is pushed, causing the elastic clamping part to bend towards the axis to clamp the hardness tester. The deformation characteristics of the elastic metal are used to adapt to hardness testers of different sizes. The conical cavity design makes the clamping force more uniform, and the flexible clamping part avoids the hardness tester from being damaged by clamping.

[0022] 5. The precise positioning of the limiting cover ensures that the hardness tester's testing end is always at the adjustment reference point, avoiding adjustment deviations and further improving the repeatability and consistency of the test.

[0023] 6. The curved plate slides through two rows of inner and outer arc-shaped guide rollers, ensuring the smoothness and coaxiality of the curved plate's rotation.

[0024] 7. Automatic alignment and adjustment replace repeated manual adjustments, significantly shortening the inspection time for a single blade, improving overall inspection efficiency, and reducing the time and manpower required for manual operation; moreover, it has a low operating threshold. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a water pump blade hardness testing device provided by the present invention; Figure 2 A schematic diagram of the structure of a water pump blade hardness detection device provided by the present invention from another perspective; Figure 3 A schematic diagram of the combined structure of the first rotating mechanism, the fixed frame, the second rotating mechanism, and the sliding guide assembly provided by the present invention; Figure 4 A schematic diagram of the combined structure of the first rotating mechanism, the fixed frame, the second rotating mechanism, and the sliding guide assembly provided by the present invention from another perspective; Figure 5 A schematic diagram of the combined structure of the arc-shaped plate and the adjustable clamping and detection mechanism provided by the present invention; Figure 6 This is a schematic diagram of the adjustable clamping and detection mechanism provided by the present invention. Figure 7 A cross-sectional view of the adjustable clamping and detection mechanism provided by the present invention; Figure 8 An exploded view of the adjustable clamping and detection mechanism provided by the present invention; Figure 9 for Figure 8 A magnified view of part A in the image.

[0026] The components include: 1. Rapid positioning detection mechanism; 2. Hardness tester; 3. Buzzer; 4. First rotating mechanism; 5. Fixing frame; 6. Second rotating mechanism; 7. Arc-shaped plate; 8. Adjustable clamping detection mechanism; 9. Sliding guide assembly; 10. Arc-shaped toothed segment; 11. Mounting frame; 12. First rotary motor; 13. Rotating shaft; 14. Second rotary motor; 15. Drive gear; 16. Clamping housing; 17. Clamping assembly; 18. Detection assembly; 19. Mounting slot; 20. Abutment. 21. Pressure sensor, 22. Clamping opening, 23. Elastic clamping part, 24. Clamping sleeve, 25. Triangular push part, 26. External thread, 27. Internal thread, 28. Guide roller, 29. Bent rod, 30. Straight rod, 31. Spring, 32. Detection sleeve, 33. Positioning pressure sensor, 34. Limiting ring, 35. Limiting cover, 36. Positioning ring, 37. Microcontroller, 38. Display screen, 39. Arc-shaped through hole, 40. Limiting slider, 41. Clearance slot.

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] like Figures 1-9 As shown, the present invention provides a pump blade hardness testing device, including a rapid positioning testing mechanism 1 and a hardness tester 2. The hardness tester 2 is installed inside the rapid positioning testing mechanism 1. The hardness tester 2 is an ultrasonic hardness tester, which is existing technology and will not be described in detail here. The rapid positioning testing mechanism 1 includes a first rotating mechanism 4, a fixed frame 5, a second rotating mechanism 6, an arc plate 7, and an adjustable clamping testing mechanism 8. The fixed frame 5 is disposed on the first rotating mechanism 4 and is U-shaped. A sliding guide assembly 9 is provided inside the fixed frame 5. The arc plate 7 is slidably disposed inside the sliding guide assembly 9. The second rotating mechanism 6 is disposed inside the fixed frame 5. An arc-shaped toothed segment 10 is coaxially fixed to the outer side of the arc plate 7. The arc plate 7 is connected to the second rotating mechanism 6 through the arc-shaped toothed segment 10. The adjustable clamping testing mechanism 8 is radially disposed inside the arc plate 7.

[0031] The first rotating mechanism 4 includes a mounting frame 11 and a first rotating motor 12. The first rotating motor 12 is fixedly mounted on the mounting frame 11. A rotating shaft 13 is rotatably mounted on the mounting frame 11. A fixed frame 5 is rotatably mounted at one end of the mounting frame 11. The output end of the first rotating motor 12 is connected to the rotating shaft 13. The rotating shaft 13 is connected to the fixed frame 5 and drives the fixed frame 5 to rotate. The axis of the rotating shaft 13 is perpendicular to and intersects the axis of the arc plate 7. A gripping part is provided on the side wall of the mounting frame 11, and a control button is provided on the gripping part.

[0032] The second rotating mechanism 6 includes a second rotating motor 14 and a drive gear 15. The drive gear 15 is rotatably mounted inside the fixed frame 5. The second rotating motor 14 is mounted on the side wall of the fixed frame 5. The output end of the second rotating motor 14 is coaxially fixed to the drive gear 15. The drive gear 15 meshes with the arc-shaped tooth segment 10. The second rotating motor 14 drives the drive gear 15 to transmit power. The drive gear 15 drives the arc plate 7 to rotate around its own axis through the arc-shaped tooth segment 10.

[0033] The adjustable clamping detection mechanism 8 includes a clamping housing 16, a clamping assembly 17, and a detection assembly 18. One end of the concave arc surface of the arc-shaped plate 7 has a mounting groove 19 adapted to the clamping housing 16. The clamping housing 16 is detachably mounted in the mounting groove 19 via a threaded connection, enabling quick assembly and disassembly. A pressure sensor 20 is provided between the arc-shaped plate 7 and the mounting groove 19. The detection assembly 18 is located at the end of the clamping housing 16 furthest from the mounting groove 19. 8 are evenly distributed in a circumferential array around the axis of the clamping housing 16. The clamping housing 16 has a hollow structure that runs through the front and back. The clamping openings 21 are equidistantly opened in the middle of the clamping housing 16 along the circumferential direction. The clamping assembly 17 is located in the middle of the clamping housing 16 and extends into the clamping housing 16 through the clamping openings 21. By adjusting the clamping assembly 17, the hardness testers 2 of different sizes can be stably clamped. The end of the clamping housing 16 away from the detection assembly 18 is provided with an avoidance slot 40, which facilitates the placement of cables.

[0034] The clamping assembly 17 includes an elastic clamping part 22 and a clamping sliding sleeve 23. One end of the elastic clamping part 22 is fixedly installed on the side wall of the clamping opening 21, and the other end of the elastic clamping part 22 passes through the clamping opening 21 and extends obliquely in the direction of the axis of the clamping housing 16. The cross-section of the elastic clamping part 22 is arc-shaped. A flexible clamping part is provided at the end of the elastic clamping part 22 near the axis of the clamping housing 16. The elastic clamping part 22 is made of elastic metal. In this embodiment, the elastic clamping part 22 is made of spring steel. The elastic clamping parts 22 are arranged in a circumferential array around the clamping housing 16. Multiple elastic clamping parts 22 together form a conical cavity for accommodating the hardness tester 2. The outer side of the elastic clamping part 22 is provided with three protrusions along the axial direction. The angled pushing part 24, the side wall of the clamping housing 16 is provided with an external thread 25, the clamping sleeve 23 is slidably sleeved on the outside of the clamping housing 16, the inner wall of the clamping sleeve 23 is provided with an internal thread 26 that meshes with the external thread 25, thereby forming a threaded transmission engagement with the clamping housing 16. By screwing the clamping sleeve 23, the clamping sleeve 23 can be driven to move along the axial direction of the clamping housing 16. When the clamping sleeve 23 approaches the triangular pushing part 24, it will apply a radial thrust to the triangular pushing part 24, thereby forcing the free end of the elastic clamping part 22 to bend in the axial direction of the clamping housing 16. By adjusting the position of the clamping sleeve 23, the degree of bending of the elastic clamping part 22 can be flexibly controlled, thereby facilitating the quick and stable clamping and fixing of hardness testers 2 of different sizes.

[0035] The sliding guide assembly 9 includes two rows of guide rollers 27 distributed along an arc. The guide rollers 27 are symmetrically arranged on two opposite inner walls of the fixed frame 5. The two rows of guide rollers 27 are located on the inner and outer sides of the arc plate 7, respectively, and are used to limit and support the sliding path of the arc plate 7, thereby ensuring the smoothness of the movement and the guiding accuracy of the arc plate 7 during the sliding process.

[0036] The fixing frame 5 is provided with symmetrical arc-shaped through holes 38 on both sides. The arc-shaped through holes 38 extend from the edge of the fixing frame 5 to the middle of the fixing frame 5. The arc-shaped through holes 38 are coaxially arranged with the arc plate 7. The two ends of the arc plate 7 are provided with limiting sliders 39 that are adapted to the arc-shaped through holes 38. The arc-shaped through holes 38 and the limiting sliders 39 limit the arc plate 7.

[0037] The outer diameter of the triangular pushing part 24 is gradually changed along the axial direction. The radial length of the end of the triangular pushing part 24 away from the detection component 18 to the axis of the clamping housing 16 is greater than the radial length of the end of the triangular pushing part 24 near the detection component 18 to the axis of the clamping housing 16. The clamping sleeve 23 is located on the side of the clamping opening 21 near the detection component 18. When the clamping sleeve 23 is moved away from the detection component 18 by screwing the clamping sleeve 23, the inner wall of the clamping sleeve 23 contacts the inclined surface of the triangular pushing part 24 and gradually applies pressure, thereby smoothly driving the elastic clamping part 22 to bend in the axial direction to achieve uniform clamping of the hardness tester 2.

[0038] The detection assembly 18 includes a bent rod 28, a straight rod 29, a spring 30, a detection sleeve 31, and a positioning pressure sensor 32. The bent rod 28 is located at the end of the clamping housing 16 and extends from the side wall of the clamping housing 16 toward the axis of the clamping housing 16. The straight rod 29 is fixedly located at the end of the bent rod 28 and integrally formed with the bent rod 28. The detection sleeve 31 is slidably located on the outside of the end of the straight rod 29 away from the bent rod 28. A limiting ring 33 is provided at the end of the bent rod 28. The spring 30 is sleeved on the outside of the straight rod 29 and is located between the limiting ring 33 and the detection sleeve 31, serving as a buffer and reset function. The positioning pressure sensor 32 is located on the side of the limiting ring 33 near the spring 30 and is used to monitor the pressure signal generated when the detection sleeve 31 contacts the blade.

[0039] The clamping housing 16, away from the arc plate 7, is connected to a limiting cover 34 via a threaded connection. The clamping housing 16, near the detection component 18, is provided with a positioning ring 35. The limiting cover 34 is used to axially limit the detection end of the hardness tester 2. When the detection end of the hardness tester 2 is in close contact with the inner wall of the limiting cover 34 during installation, the detection end of the hardness tester 2 is precisely positioned at the spatial intersection of the axis of the arc plate 7 and the axis of the rotating shaft 13. Through the limiting cover 34, quick and accurate positioning can be achieved when replacing or installing the hardness tester 2, ensuring that the detection point of the hardness tester 2 is located in the preset standard position during each test, thereby improving the repeatability and accuracy of the test results.

[0040] The mounting bracket 11 is equipped with a microcontroller 36. The side wall of the mounting bracket 11 is equipped with a display screen 37 and a buzzer 3. The microcontroller 36 is electrically connected to the display screen 37, the buzzer 3, the pressing pressure sensor 20 and each positioning pressure sensor 32. The microcontroller 36 can receive the pressure signals collected by the pressing pressure sensor 20 and the positioning pressure sensor 32 in real time and process the data.

[0041] In practical use, first remove the clamping housing 16 from the mounting slot 19. Initially, the clamping sleeve 23 is away from the triangular pushing part 24, and the limiting cover 34 is installed at the end of the clamping housing 16 near the detection component 18. The side wall of the limiting cover 34 is tightly fitted with the positioning ring 35. Then, insert the hardness tester 2 into the clamping housing 16 from the end away from the detection component 18. When the detection end of the hardness tester 2 is tightly fitted with the limiting cover 34, stop pushing the hardness tester 2. Then, screw the clamping sleeve 23. Through the internal thread 26 and the external thread 25, the clamping sleeve 23 moves along the clamping housing 16 closer to the triangular pushing part 24, thereby providing elastic clamping. The elastic clamping part 22 applies a pushing force, causing the free end of the elastic clamping part 22 to bend towards the axis of the clamping housing 16, facilitating the clamping and fixing of hardness testers 2 of different sizes. When the elastic clamping part 22 firmly clamps the hardness tester 2 inside the clamping housing 16, the rotation of the clamping sleeve 23 is stopped, and the cable is passed through the clearance slot 40. Then, the end of the clamping housing 16 away from the detection component 18 is threaded into the mounting slot 19. At this time, the detection end of the hardness tester 2 is located at the intersection of the axis of the arc plate 7 and the axis of the rotating shaft 13. The testing personnel use the gripping part to grasp the device for testing, remove the limiting cover 34 from the clamping housing 16, and then... The detection end of the pressure gauge 2 presses against the water pump blade. When pressed, the pressure sensor 20 generates an electrical signal. The microcontroller 36 controls the buzzer 3 to emit a 3-5 second beep. At the same time, the display screen 37 displays the pressure value of each positioning pressure sensor 32. Based on the pressure value of each detection component 18, the microcontroller controls the first rotary motor 12 and the second rotary motor 14. The first rotary motor 12 drives the second rotary mechanism 6 and the adjustable clamping detection mechanism 8 to rotate synchronously around the axis of the rotary shaft 13 via the rotating shaft 13. The second rotary motor 14 drives the drive gear 15 for transmission. The drive gear 15 drives the arc plate 7 to rotate around the arc through the arc-shaped tooth segment 10. The arc plate 7 rotates along its own axis, thereby driving the adjustable clamping and testing mechanism 8 and the hardness tester 2 to rotate around the axis of the arc plate 7. Through the cooperation of the first rotating mechanism 4 and the second rotating mechanism 6, the arc plate 7 drives the adjustable clamping and testing mechanism 8 and the hardness tester 2 to rotate in multiple directions around the intersection point of the axis of the arc plate 7 and the axis of the rotating shaft 13 for adjustment, that is, to rotate in multiple directions around the contact point between the testing end of the hardness tester 2 and the blade. When the pressure values ​​of each positioning pressure sensor 32 are equal, the microcontroller 36 controls the first rotating motor 12 and the second rotating motor 14 to stop rotating. At this time, the hardness tester 2 is aligned with the normal of the surface being tested, which facilitates accurate detection of the hardness of the water pump blade.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for detecting the hardness of water pump blades, characterized in that: The device includes a rapid positioning detection mechanism (1) and a hardness tester (2), wherein the hardness tester (2) is installed inside the rapid positioning detection mechanism (1); the rapid positioning detection mechanism (1) includes a first rotating mechanism (4), a fixed frame (5), a second rotating mechanism (6), an arc plate (7) and an adjustable clamping detection mechanism (8), wherein the fixed frame (5) is disposed on the first rotating mechanism (4), the fixed frame (5) is U-shaped, a sliding guide assembly (9) is provided inside the fixed frame (5), the arc plate (7) is slidably disposed inside the sliding guide assembly (9), the second rotating mechanism (6) is disposed inside the fixed frame (5), an arc tooth segment (10) is coaxially fixed to the outside of the arc plate (7), the arc plate (7) is connected to the second rotating mechanism (6) through the arc tooth segment (10), and the adjustable clamping detection mechanism (8) is radially disposed inside the arc plate (7).

2. The pump blade hardness testing device according to claim 1, characterized in that: The adjustable clamping detection mechanism (8) includes a clamping shell (16), a clamping component (17), and a detection component (18). One end of the concave arc surface of the arc plate (7) is provided with a mounting groove (19) that is adapted to the clamping shell (16). The clamping shell (16) is set in the mounting groove (19). A pressing pressure sensor (20) is provided between the arc plate (7) and the mounting groove (19). The detection component (18) is located at the end of the clamping shell (16) away from the mounting groove (19). The detection components (18) are evenly distributed in a circumferential array around the axis of the clamping shell (16). The clamping shell (16) has a hollow structure that runs through the front and back. The clamping openings (21) are equidistantly opened in the middle of the clamping shell (16) along the circumferential direction. The clamping component (17) is located in the middle of the clamping shell (16) and extends into the clamping shell (16) through the clamping openings (21).

3. The pump blade hardness testing device according to claim 2, characterized in that: The detection component (18) includes a bent rod (28), a straight rod (29), a spring (30), a detection sleeve (31), and a positioning pressure sensor (32). The bent rod (28) is located at the end of the clamping shell (16). The bent rod (28) extends from the side wall of the clamping shell (16) towards the axis of the clamping shell (16). The straight rod (29) is fixedly located at the end of the bent rod (28) and integrally formed with the bent rod (28). The detection sleeve (31) is slidably located on the outside of the end of the straight rod (29) away from the bent rod (28). The end of the bent rod (28) is provided with a limiting ring (33). The spring (30) is sleeved on the outside of the straight rod (29). The spring (30) is located between the limiting ring (33) and the detection sleeve (31). The positioning pressure sensor (32) is located on the side of the limiting ring (33) close to the spring (30).

4. The pump blade hardness testing device according to claim 3, characterized in that: The clamping assembly (17) includes an elastic clamping part (22) and a clamping slide sleeve (23). One end of the elastic clamping part (22) is fixedly installed on the side wall of the clamping opening (21), and the other end of the elastic clamping part (22) passes through the clamping opening (21) and extends obliquely in the direction of the axis of the clamping shell (16). The cross-section of the elastic clamping part (22) is arc-shaped. A flexible clamping part is provided at one end of the elastic clamping part (22) near the axis of the clamping shell (16). Made of elastic metal, the elastic clamping parts (22) are arranged in a circumferential array around the clamping shell (16), and multiple elastic clamping parts (22) together form a conical cavity. The outer side of the elastic clamping parts (22) is provided with a protruding triangular pushing part (24) along the axial direction. The side wall of the clamping shell (16) is provided with an external thread (25). The clamping sleeve (23) is slidably sleeved on the outer side of the clamping shell (16). The inner wall of the clamping sleeve (23) is provided with an internal thread (26) that meshes with the external thread (25).

5. The pump blade hardness testing device according to claim 4, characterized in that: The outer diameter of the triangular push part (24) is gradually changed along the axial direction. The radial length from the end of the triangular push part (24) away from the detection component (18) to the axis of the clamping shell (16) is greater than the radial length from the end of the triangular push part (24) close to the detection component (18) to the axis of the clamping shell (16). The clamping slide sleeve (23) is located on the side of the clamping opening (21) close to the detection component (18).

6. The pump blade hardness testing device according to claim 5, characterized in that: The sliding guide assembly (9) includes two rows of guide rollers (27) distributed along the arc. The guide rollers (27) are symmetrically arranged on the two opposite inner walls of the fixed frame (5). The two rows of guide rollers (27) are located on the inner and outer sides of the arc plate (7), respectively.

7. The pump blade hardness testing device according to claim 6, characterized in that: The clamping housing (16) is connected to a limit cover (34) by a threaded connection at one end away from the arc plate (7), and a positioning ring (35) is provided at the other end of the clamping housing (16) near the detection component (18).

8. The pump blade hardness testing device according to claim 7, characterized in that: The first rotating mechanism (4) includes a mounting frame (11) and a first rotating motor (12). The first rotating motor (12) is fixedly mounted on the mounting frame (11). A rotating shaft (13) is rotatably mounted on the mounting frame (11). A fixed frame (5) is rotatably mounted on one end of the mounting frame (11). The output end of the first rotating motor (12) is connected to the rotating shaft (13). The rotating shaft (13) is connected to the fixed frame (5) and drives the fixed frame (5) to rotate. The axis of the rotating shaft (13) is perpendicular to and intersects the axis of the arc plate (7).

9. The pump blade hardness testing device according to claim 8, characterized in that: The second rotating mechanism (6) includes a second rotating motor (14) and a drive gear (15). The drive gear (15) is rotatably mounted inside the fixed frame (5). The second rotating motor (14) is mounted on the side wall of the fixed frame (5). The output end of the second rotating motor (14) is coaxially fixed to the drive gear (15). The drive gear (15) meshes with the arc-shaped tooth segment (10).

10. A pump blade hardness testing device according to claim 9, characterized in that: The mounting bracket (11) is equipped with a microcontroller (36), and the side wall of the mounting bracket (11) is equipped with a display screen (37) and a buzzer (3). The microcontroller (36) is electrically connected to the display screen (37), the buzzer (3), the pressing pressure sensor (20) and each positioning pressure sensor (32).

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