A probe device for a magnetic flux leakage inspection apparatus

Abstract

The application discloses a kind of probe devices for magnetic flux leakage detection equipment, it is related to nondestructive testing technical field, it includes probe device, two are symmetrically and oppositely arranged in probe device, each probe device includes bearing table, probe frame, probe limiting component and magnetic yoke component are set on bearing table, probe frame is provided with probe main body, probe limiting component is connected with probe frame, magnetic yoke component is C-shaped, its inside forms a C-shaped cavity, at least a part of probe main body is inserted into C-shaped cavity;Probe limiting component can actively adjust the position of probe main body, can also provide push-pull force for probe main body when working, so that probe main body always remains stable, it is favorable to improve the detection effect of probe main body, probe main body telescopic in the C-shaped cavity of magnetic yoke component, increase the response time of magnetization, detection, it is favorable to improve detection efficiency and detection accuracy.

Description

Technical Field

[0001] This application relates to the field of nondestructive testing technology, and in particular to a probe device for magnetic flux leakage detection equipment. Background Technology

[0002] Magnetic flux leakage nondestructive testing is a technology that captures defect information by detecting changes in the magnetic flux leakage field after the object is magnetized. It is a technology that provides fast and nondestructive testing for ferromagnetic material workpieces. It has the characteristics of high reliability and easy automation and is widely used.

[0003] Magnetic flux leakage (MFL) testing equipment generally consists of a rotating mechanism that drives the main body to rotate, a magnetizing mechanism for magnetizing ferromagnetic materials, and a probe mechanism for MFL detection. The rotating main body magnetizes and detects the ferromagnetic material. During testing, the probe needs to be in contact with the material surface. If the probe is pressed too tightly against the material, it not only affects the rotation of the main body but also causes severe wear on the probe, affecting its lifespan and detection accuracy. Conversely, if the probe is too far from the material surface, it may not be able to make contact or may be too far away, also affecting detection accuracy. Existing technology CN112098508B discloses a rotating probe device for MFL flaw detection equipment. The proposed solution includes a body and a magnetic circuit guide. The magnetic circuit guide houses a probe fixing device for contacting the outer surface of the workpiece. The probe is mounted on the side of the probe fixing device closest to the workpiece. The technical effect achieved is that, during the rotation of the rotating shaft within the body, centrifugal force brings the probe into contact with the outer surface of the workpiece, improving the accuracy of magnetic flux leakage detection. Existing technologies rely on the centrifugal force of the rotating body to maintain continuous contact between the probe and the material. However, the speed of the rotating body determines the magnitude of the centrifugal force. When the rotating body speed is slow, the above solution fails to achieve the desired effect, resulting in unstable contact between the probe and the material and poor detection performance. Utility Model Content

[0004] Purpose of the invention: This application provides a probe device for magnetic flux leakage detection equipment, which aims to improve the technical problem of unstable contact between the magnetic flux leakage detection probe and the material surface.

[0005] Technical Solution: This application provides a probe device for magnetic flux leakage detection equipment, including a main body. The main body includes a housing and a detection mechanism disposed within the housing. The detection mechanism includes a mounting plate and probe devices disposed on the mounting plate. Two probe devices are symmetrically and oppositely arranged. Each probe device includes a support platform, a probe frame, a probe limiting component disposed on the support platform, and a magnetic yoke component. The support platform is fixed to the upper surface of the mounting plate. A probe body is disposed on the probe frame. The probe limiting component is connected to the probe frame. An eccentric shaft is disposed on the support platform between the probe limiting component and the probe frame. The magnetic yoke component is C-shaped, with a C-shaped cavity formed on its inner side. At least a portion of the probe body extends into the C-shaped cavity. An electrical box is also disposed on the support platform.

[0006] By adopting the above technical solution, the two probe devices are arranged opposite each other on both sides of the material, which helps to improve detection efficiency and detection accuracy. The C-shaped magnetic yoke device is conducive to accommodating the probe body and facilitating the position adjustment of the probe body. The probe limiting component is used to limit the position of the probe body and can keep the probe body in a stable position, which is beneficial to the continuity and stability of the contact between the probe body and the material surface.

[0007] Furthermore, the probe limiting assembly includes a fixed base, an adjusting shaft, a Y-type connector, and a limiting tension spring connected in sequence. The end of the limiting tension spring away from the Y-type connector is connected to the probe frame. A pin is provided at the end of the Y-type connector, and the pin passes through the Y-type connector. The end of the limiting tension spring facing away from the probe frame is connected to the pin. The adjusting shaft passes through the fixed base and is connected to the Y-type connector. A locking nut is provided on the adjusting shaft between the fixed base and the Y-type connector. The fixed base is mounted on a support platform.

[0008] By adopting the above technical solution, the probe limiting component forms an adjustable elastic connector, which can counteract the influence of centrifugal force on the probe body, improve the stability of the probe body, and help increase the detection effect.

[0009] Furthermore, the magnetic yoke assembly includes a magnetic yoke mounting plate, a rear cover plate, a magnetic yoke bracket, and a silicon steel body connected in sequence. The magnetic yoke mounting plate is fixed to the support platform by clamps. At least two magnetic yoke brackets are provided, and the two magnetic yoke brackets are fixed to one side of the rear cover plate, one above the other. Each magnetic yoke bracket is provided with a receiving groove. The silicon steel body is located between the two magnetic yoke brackets, and its end is placed in the receiving groove. A wire interface is opened on the rear cover plate, and a wire connector is connected to the wire interface. The wire interface is used to supply power to the silicon steel body. Wire grooves are opened on both the magnetic yoke mounting plate and the support platform. The wire connector extends through the wire groove to the bottom of the mounting plate.

[0010] By adopting the above technical solution, the magnetic yoke assembly is used to magnetize the material after being energized. The silicon steel body is made of silicon steel, which, as a magnetic material, has the characteristics of high permeability, low coercivity, and large resistivity. The magnetic yoke bracket can stably and firmly fix the silicon steel body, improving the stability during operation. The magnetic yoke mounting plate has high installation strength, increasing the robustness of the magnetic yoke assembly.

[0011] Furthermore, the magnetic yoke support is provided with side cover plates on both sides, one side of the side cover plate abutting against the rear cover plate, and an inner liner block is provided on the inner side of each side cover plate. The inner liner block is placed between the rear cover plate and the silicon steel body. The end of the magnetic yoke support facing away from the support platform is also provided with a guide block. The guide block is embedded in the magnetic yoke support, and each magnetic yoke support is provided with at least two guide blocks.

[0012] By adopting the above technical solution, the two magnetic yoke supports and the side cover plate are used to protect the three sides of the silicon steel body, leaving the side of the silicon steel body facing the material open. The inner liner block is used to support and hold the silicon steel body, improving the stability of the silicon steel body. The guide block is used to guide the probe body when it enters and exits the C-shaped cavity, preventing the probe body from rubbing against the magnetic yoke support.

[0013] Furthermore, the probe frame includes a vertically arranged fixing rod, an upper fixing plate and a lower fixing plate respectively arranged at the upper and lower ends of the fixing rod, a probe cover plate is fixedly arranged on the back of the probe body, the probe cover plate is connected to the upper fixing plate and the lower fixing plate respectively, a connecting plate is provided at one end of the upper fixing plate, the connecting plate is connected to the probe limiting assembly, and a wear-resistant sheet is attached to the surface of the probe body, the wear-resistant sheet is formed by splicing together staggered silicon carbide sheets and wear-resistant plastic plates.

[0014] By adopting the above technical solution, the probe body is fixed and locked by the upper and lower fixing plates, which improves the stability of the probe body. The abrasion-resistant pads increase the abrasion resistance of the probe body, reduce friction damage to the probe body, and improve the detection accuracy and service life of the probe body.

[0015] Furthermore, the probe holder also includes a connecting rod, one end of which is provided with a bearing, which is sleeved on the fixing rod between the upper fixing plate and the lower fixing plate, and the other end of the connecting rod is fixed to the support platform.

[0016] By adopting the above technical solution, the flexibility of the probe holder is improved, making it easier for the probe holder and the probe body to achieve synchronous angle adjustment, thereby realizing the adjustment of the probe body position.

[0017] Furthermore, the mounting plate is also equipped with an amplification device, which includes a cavity on the mounting plate, a front amplification plate disposed in the cavity, and a sealing cover plate covering the cavity. The sealing cover plate is provided with a handle. The amplification device corresponds one-to-one with the probe device. The amplification device is located on one side of the probe device. The mounting plate on one side of the amplification device is also provided with a scale.

[0018] By adopting the above technical solution, a preamplifier board is set up to amplify weak signals, improve the system's signal-to-noise ratio, reduce external interference, and achieve impedance transformation and matching.

[0019] Furthermore, the mounting plate is equipped with multiple aviation plugs, and at least a portion of the electrical box extends into the interior of the support platform. The electrical box is electrically connected to the probe body.

[0020] By adopting the above technical solution, electrical connections can be easily made, enabling automated control.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The probe limiting component can actively adjust the position of the probe body and provide push and pull force for the probe body during operation, so that the probe body always remains stable, which is conducive to improving the detection effect of the probe body;

[0023] 2. The probe body extends and retracts within the C-shaped cavity of the magnetic yoke assembly to increase the integration of the probe body and the magnetic yoke assembly, improve the response time of magnetization and detection, and thus improve detection efficiency and accuracy.

[0024] 3. Abrasion-resistant pads are attached to the probe body to increase its abrasion resistance, reduce friction damage, and improve the detection accuracy and service life of the probe body. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the detection mechanism structure according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the probe device structure according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the magnetic yoke assembly structure according to an embodiment of this application;

[0029] Figure 5 This is an exploded view of the magnetic yoke assembly according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Detection mechanism; 3. Mounting plate; 4. Probe device; 40. Filler; 41. Support platform; 42. Probe holder; 421. Fixing rod; 422. Upper fixing plate; 423. Lower fixing plate; 424. Connecting plate; 43. Probe body; 44. Probe limiting assembly; 441. Fixing base; 442. Adjusting shaft; 443. Y-type connector; 445. Limiting tension spring; 45. Magnetic yoke assembly; 451. Upper magnetic yoke support; 452. Lower magnetic yoke support; 453. Silicon steel body; 454. Side cover plate; 455. Magnetic yoke mounting plate; 456. Clamping block; 457. Rear cover plate; 458. Receiving groove; 459. Inner liner block; 46. Electrical box; 47. Eccentric shaft; 48. Wire connector; 5. Amplification device; 6. Aviation plug. Detailed Implementation

[0031] The following combination Figures 1-5 This application will be described in further detail.

[0032] This application discloses a probe device for a magnetic flux leakage detection equipment. (Refer to...) Figure 1 , Figure 2 As shown, the magnetic flux leakage detection equipment includes a main body, which includes a housing 1 and a detection mechanism 2 disposed within the housing 1. The main body also includes a drive mechanism for rotating the detection mechanism 2 and a conveying mechanism for conveying workpiece material. The detection mechanism 2 includes a mounting plate 3 and two probe devices 4. Two probe devices 4 are symmetrically and oppositely arranged, and the space between the two probe devices 4 forms a detection cavity. The workpiece material passes through the detection cavity to achieve magnetization and magnetic flux leakage detection. Each probe device 4 includes a support platform 41, a probe holder 42, a probe limiting assembly 44, and a magnetic yoke assembly 45. The support platform 41 is fixedly mounted on the mounting plate 3, and the probe holder 42, probe limiting assembly 44, and magnetic yoke assembly 45 are also included. All components 45 are mounted on the support platform 41. The probe body 43 is fixedly mounted on the probe frame 42. The probe limiting component 44 is connected to the probe frame 42 and is used to adjust the position of the probe frame 42 during operation and to provide a pushing and pulling force to the probe frame 42 to achieve the limiting function, so that the probe body 43 on the probe frame 42 remains stable and is always in contact with the workpiece material. The back of the magnetic yoke component 45 is fixed on the support platform 41. The magnetic yoke component 45 is C-shaped, and a C-shaped cavity is formed on its inner side. Part of the probe body 43 is placed in the C-shaped cavity, and the other part extends out of the C-shaped cavity. The extended part protrudes from the surface of the magnetic yoke component 45, and the extended part of the probe body 43 is in contact with the workpiece material.

[0033] Reference Figure 2 , Figure 3As shown, the probe limiting assembly 44 is installed on the upper surface of the support platform 41. The probe limiting assembly 44 includes a fixed base 441, an adjusting shaft 442, a Y-type connector 443, and a limiting tension spring 445 connected in sequence. Specifically, the fixed base 441 is installed on the mounting plate 3. The adjusting shaft 442 passes through the fixed base 441 and is connected to one end of the Y-type connector 443. The end of the Y-type connector 443 is provided with a pin. One end of the limiting tension spring 445 is connected to the pin, and the other end is connected to the connecting plate 424 on the probe holder 42. The fixed base 441 and the Y-type connector 443... A locking nut is fitted onto the adjusting shaft 442. During use, the tension of the limiting spring 445 is adjusted by rotating the adjusting shaft 442 in both directions. This causes the limiting spring 445 to pull the connecting plate 424, which rotates around the eccentric shaft 47 at a certain angle, synchronously driving the probe holder 42 to move. The fixing rod 421 rotates in both directions under the action of the bearing on the connecting rod. When the limiting spring 445 pushes the connecting plate 424, the fixing rod 421 rotates forward. Under the lever principle, the fixing rod 421 retracts the probe body 43 into the C-shaped cavity; conversely, it retracts the probe body... More of probe 43 extends out of the C-shaped cavity, thereby enabling adjustment of the position of probe body 43. When probe body 43 wears or is inspecting workpiece materials of different diameters, the position of probe body 43 is adjusted to ensure that probe body 43 is always in contact with the surface of the workpiece material. Simultaneously, during operation in rotation, the limiting spring 445 constantly exerts a push-pull force on probe body 43. During high-speed rotation, the centrifugal force is significant, causing probe body 43 to adhere tightly to the surface of the workpiece material under the action of centrifugal force. At this time, the limiting spring 445 pulls the probe body 43, ensuring that probe body 43 remains in contact with the workpiece material. The surface of the workpiece material is relaxed, reducing wear on the probe body 43. When rotating at low speed, the centrifugal force is small. Based on the pre-adjusted position, the limiting spring 445 generates a thrust on the probe body 43, keeping the probe body 43 always in contact with the workpiece material surface. The limiting spring 445 also provides elastic buffering when the probe body 43 is working, increasing the shock absorption effect of the probe body 43. The probe limiting assembly 44 forms an adjustable elastic connector, which can counteract the influence of centrifugal force on the probe body 43, improve the stability of the probe body 43, and help increase the detection effect.

[0034] Reference Figures 2-5As shown, the magnetic yoke assembly 45 includes a magnetic yoke mounting plate 455, a rear cover plate 457, a magnetic yoke bracket, and a silicon steel body 453 connected in sequence. In use, the magnetic yoke mounting plate 455 is fixed to the support platform 41 by clamps 456, the rear cover plate 457 is fixed to the magnetic yoke mounting plate 455, and the magnetic yoke bracket is fixedly mounted on the rear cover plate 457. The magnetic yoke bracket includes an upper magnetic yoke bracket 451 and a lower magnetic yoke bracket 452, which are positioned opposite each other at the upper and lower ends of one side of the rear cover plate 457. The C-shaped silicon steel body 453 is installed between the upper magnetic yoke bracket 451 and the lower magnetic yoke bracket 452, with at least a portion extending into the receiving groove 458. Two inner lining blocks 459 are also provided between the silicon steel body 453 and the rear cover plate 457. Each inner lining block 459 has a side cover plate 454 installed on its outer side. The magnetic yoke is connected via the upper magnetic yoke bracket 451 and the lower magnetic yoke bracket 452. Two side cover plates 454 partially enclose the silicon steel body 453 on the magnetic yoke assembly 45, leaving the side of the silicon steel body 453 facing the workpiece material to facilitate magnetization of the workpiece material. A wire interface is opened on the rear cover plate 457, and a wire connector 48 is connected to the wire interface. The wire interface is used to supply power to the silicon steel body 453. Wire grooves are opened on both the magnetic yoke mounting plate 455 and the support platform 41. The wire connector 48 passes through the wire groove and extends to the bottom of the mounting plate 3 to be electrically connected to the drive mechanism. A guide block is also provided at the opening of each magnetic yoke bracket. The guide block is embedded in the magnetic yoke bracket and is used to guide the probe body 43 when it enters and exits the C-shaped cavity to prevent the probe body 43 from rubbing against the magnetic yoke bracket. The magnetic yoke assembly 45 securely installs the silicon steel body 453 through the magnetic yoke mounting plate 455, the rear cover plate 457 and the magnetic yoke bracket, and can still maintain good stability when the detection mechanism 2 rotates.

[0035] Reference Figures 2-4As shown, the probe holder 42 is used to mount the probe body 43, which includes a vertically arranged fixing rod 421, an upper fixing plate 422 and a lower fixing plate 423 respectively disposed at the upper and lower ends of the fixing rod 421, and a connecting plate 424 fixed to one side of the upper fixing plate 422. A probe cover plate is provided on the back of the probe body 43, and the probe cover plate is fixedly connected to the sides of the upper fixing plate 422 and the lower fixing plate 423 respectively. A wear-resistant sheet is attached to the side of the probe body 43 facing the workpiece material. The wear-resistant sheet is composed of staggered silicon carbide sheets and wear-resistant plastic plates. Specifically, there are two silicon carbide sheets, which are respectively disposed on the probe body. On the upper and lower inclined surfaces of the probe body 43, wear-resistant plastic plates are placed on the probe body 43 between two silicon carbide plates. The wear-resistant plates increase the wear resistance of the probe body 43, reduce friction damage to the probe body 43, and improve the detection accuracy and service life of the probe body 43. The fixing rod 421 is also provided with an annular groove. The bearing at the end of the connecting rod is sleeved in the annular groove to achieve a movable connection with the fixing rod 421. The annular groove is set between the upper fixing plate 422 and the lower fixing plate 423. The end of the connecting rod away from the bearing is fixed on the support platform 41, and the fixing rod 421 rotates within the bearing.

[0036] Reference Figure 2 As shown, the mounting plate 3 is also equipped with an amplification device 5. Each probe device 4 corresponds to an amplification device 5. The amplification device 5 includes a cavity opened on the mounting plate 3. A preamplifier board is installed in the cavity. A sealing cover is provided at the opening of the cavity. A handle is provided on the upper end face of the sealing cover. The preamplifier board is used to amplify weak signals and improve the signal-to-noise ratio of the system, reduce external interference, and realize impedance conversion and matching. The mounting plate 3 is also equipped with multiple aviation plugs 6 for easy electrical connection. The carrier platform 41 is also equipped with an electrical box 46. The electrical box 46 is electrically connected to the probe body 43 and is used to set the parameters of the probe body 43 and transmit information data.

[0037] The implementation principle of the probe device for magnetic flux leakage detection equipment in this application embodiment is as follows: First, based on the diameter of the workpiece material to be tested, the position of the probe body 43 is preset by rotating the adjustment shaft 442. The drive mechanism drives the mounting plate 3 to rotate, which synchronously drives the probe device 4 to rotate. The workpiece material extends between the two probe devices 4. The magnetic yoke assembly 45 is energized to magnetize the workpiece material, and the probe body 43 performs magnetic flux leakage detection on the workpiece material. During operation, the limiting spring 445 always generates a push-pull force on the probe body 43. When rotating at high speed, the centrifugal force is large, and the probe body 43 is tightly attached to the surface of the workpiece material under the action of the centrifugal force. At this time, the limiting spring... 445 pulls the probe body 43, loosening the contact between the probe body 43 and the surface of the workpiece material, reducing wear on the probe body 43; when rotating at low speed, the centrifugal force is small, and based on the pre-adjusted position, the limiting spring 445 generates a thrust on the probe body 43, keeping the probe body 43 always in contact with the surface of the workpiece material, and the limiting spring 445 can also provide elastic buffer when the probe body 43 is working, increasing the shock absorption effect of the probe body 43; the probe limiting component 44 forms an adjustable elastic connector, which can counteract the influence of centrifugal force on the probe body 43, improve the stability of the probe body 43, and help increase the detection effect.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A probe device for a magnetic flux leakage detection equipment, comprising a main body, the main body including a housing (1) and a detection mechanism (2) disposed within the housing (1), characterized in that: The detection mechanism (2) includes a mounting plate (3) and a probe device (4) set on the mounting plate (3). Two probe devices (4) are symmetrically and oppositely arranged. Each probe device (4) includes a support platform (41), a probe frame (42), a probe limiting component (44) set on the support platform (41), and a magnetic yoke component (45). The support platform (41) is fixed on the upper end face of the mounting plate (3). A probe body (43) is set on the probe frame (42). The probe limiting component (44) is connected to the probe frame (42). An eccentric shaft (47) is provided on the support platform (41) between the probe limiting component (44) and the probe frame (42). The magnetic yoke component (45) is C-shaped, and a C-shaped cavity is formed on its inner side. At least a part of the probe body (43) extends into the C-shaped cavity. An electrical box (46) is also provided on the support platform (41).

2. The probe device for magnetic flux leakage detection equipment according to claim 1, characterized in that: The probe limiting assembly (44) includes a fixed base (441), an adjusting shaft (442), a Y-type connector (443), and a limiting tension spring (445) connected in sequence. The end of the limiting tension spring (445) away from the Y-type connector (443) is connected to the probe frame (42). The end of the Y-type connector (443) is provided with a pin, which passes through the Y-type connector (443). The end of the limiting tension spring (445) facing away from the probe frame (42) is connected to the pin. The adjusting shaft (442) passes through the fixed base (441) and is connected to the Y-type connector (443). A locking nut is provided on the adjusting shaft (442) between the fixed base (441) and the Y-type connector (443). The fixed base (441) is mounted on the support platform (41).

3. The probe device for magnetic flux leakage detection equipment according to claim 1, characterized in that: The magnetic yoke assembly (45) includes a magnetic yoke mounting plate (455), a rear cover plate (457), a magnetic yoke bracket, and a silicon steel body (453) connected in sequence. The magnetic yoke mounting plate (455) is fixed on the support platform (41) by a clamp (456). There are at least two magnetic yoke brackets, which are fixed on one side of the rear cover plate (457) with the two magnetic yoke brackets facing each other. Each magnetic yoke bracket is provided with a receiving groove (458). The silicon steel body (453) is located between the two magnetic yoke brackets, and its end is placed in the receiving groove (458). The rear cover plate (457) has a wire interface, and a wire connector (48) is connected to the wire interface. The wire interface is used to supply power to the silicon steel body (453). The magnetic yoke mounting plate (455) and the support platform (41) are both provided with wire grooves. The wire connector (48) extends through the wire groove to the bottom of the mounting plate (3).

4. The probe device for magnetic flux leakage detection equipment according to claim 3, characterized in that: The magnetic yoke support is provided with side cover plates (454) on both sides. One side of the side cover plate (454) abuts against the rear cover plate (457). Each side cover plate (454) is also provided with an inner liner block (459) on its inner side. The inner liner block (459) is placed between the rear cover plate (457) and the silicon steel body (453). The end of the magnetic yoke support facing away from the support platform (41) is also provided with a guide block. The guide block is embedded in the magnetic yoke support. Each magnetic yoke support is provided with at least two guide blocks.

5. The probe device for magnetic flux leakage detection equipment according to claim 1, characterized in that: The probe frame (42) includes a vertically arranged fixing rod (421), an upper fixing plate (422) and a lower fixing plate (423) respectively arranged at the upper and lower ends of the fixing rod (421). A probe cover plate is fixedly arranged on the back of the probe body (43). The probe cover plate is connected to the upper fixing plate (422) and the lower fixing plate (423) respectively. A connecting plate (424) is provided at one end of the upper fixing plate (422). The connecting plate (424) is connected to the probe limiting assembly (44). A wear-resistant sheet is attached to the surface of the probe body (43). The wear-resistant sheet is formed by splicing together staggered silicon carbide sheets and wear-resistant plastic plates.

6. The probe device for magnetic flux leakage detection equipment according to claim 5, characterized in that: The probe holder (42) also includes a connecting rod. One end of the connecting rod is provided with a bearing, which is sleeved on the fixing rod (421) between the upper fixing plate (422) and the lower fixing plate (423). The other end of the connecting rod is fixed on the support platform (41).

7. The probe device for magnetic flux leakage detection equipment according to claim 1, characterized in that: The mounting plate (3) is also provided with an amplification device (5). The amplification device (5) includes a cavity opened on the mounting plate (3), a front amplification plate disposed in the cavity, and a sealing cover plate covering the cavity. The sealing cover plate is provided with a handle. The amplification device (5) corresponds one-to-one with the probe device (4). The amplification device (5) is located on one side of the probe device (4). The mounting plate (3) on one side of the amplification device (5) is also provided with a scale.

8. The probe device for magnetic flux leakage detection equipment according to claim 1, characterized in that: The mounting plate (3) is provided with multiple aviation plugs (6), and at least part of the electrical box (46) extends into the interior of the support platform (41). The electrical box (46) is electrically connected to the probe body (43).

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