Universal contactor for magnetic particle flaw detector

Abstract

The utility model relates to a universal contact for magnetic particle flaw detector, including mounting plate body, the recess is seted up in mounting plate body bottom, the recess inside is provided with threaded rod, the opposite thread is seted up in the both ends of threaded rod outside, the both ends of threaded rod outside all are penetrated and have the moving block, and the threaded rod is connected with the screw hole in moving block, the moving block bottom is installed with universal joint, the universal joint bottom is provided with contact subassembly, the quick assembly of dismounting is installed on the universal joint surface, the utility model can utilize drive motor to drive threaded rod, pass through the opposite thread of threaded rod surface setting, simultaneously drive two moving blocks to move to the opposite direction, thereby directly adjusting the interval of two universal contacts with moving block, makes universal contact to be able to according to actual detection condition, for example, the workpiece of different size and shape or the adjustment magnetic field coverage range, carries out the interval adjustment of pertinence, has promoted the adjustable nature of universal contact.

Description

Technical Field

[0001] This utility model relates to the field of magnetic particle flaw detector probes, specifically a universal contact for magnetic particle flaw detectors. Background Technology

[0002] In simple terms, a magnetic particle inspection machine utilizes the magnetic properties of magnetized ferromagnetic materials to attract magnetic powder applied to the surface of a workpiece through a leakage magnetic field. This forms a magnetic mark that is visible to the naked eye under appropriate lighting, thus revealing the location, shape, and size of discontinuities to detect defects in the workpiece. Currently, magnetic particle inspection machines are mainly used for the inspection of rod-shaped, tubular, and other materials.

[0003] According to the published patent CN218546618U, a universal contact for a non-destructive testing magnetic particle flaw detector is disclosed. The universal joint has a connecting hinge at its bottom, and a connecting frame in the shape of an inverted U-shape is located at the bottom of the connecting hinge. Positioning holes are provided on both sides of the connecting frame. The contact component includes a connecting seat that engages with the connecting frame. A positioning groove corresponding to the positioning hole is provided on the connecting seat. A flaw detector probe is connected to the bottom of the connecting seat. The connecting component includes a positioning pin that engages with the positioning hole and positioning groove. The engagement of the connecting frame and connecting seat initially limits and fixes the flaw detector probe. Furthermore, the engagement of the positioning pin with the positioning hole and positioning groove further fixes the flaw detector probe to the universal joint, facilitating its disassembly and assembly for subsequent maintenance. Additionally, a limiting spring, after following the positioning pin into the positioning groove, provides a certain degree of restraint, further increasing connection stability.

[0004] However, in practice, the universal joints used in traditional magnetic particle flaw detectors have a fixed spacing. This spacing affects the effective width and strength of the magnetic field. If the spacing is too short, although the magnetic field is concentrated, the detection range is limited; if the spacing is too long, the magnetic field coverage increases, but the magnetic field strength is easily weakened, affecting the detection sensitivity. At the same time, different sizes and shapes of workpieces require different contact spacings. For example, large workpieces require a larger spacing to cover a sufficient detection area, while smaller spacing is more suitable for small or complex-shaped workpieces. Therefore, new technical solutions need to be designed to address this issue. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, adapt to practical needs, and provide a universal contact for magnetic particle flaw detectors. This addresses the problem that current traditional universal contacts in magnetic particle flaw detectors use a fixed contact spacing, which affects the effective width and strength of the magnetic field. If the spacing is too short, although the magnetic field is concentrated, the detection range is limited; if the spacing is too long, the magnetic field coverage increases, but the magnetic field strength is easily weakened, affecting detection sensitivity. Furthermore, different sizes and shapes of workpieces require different contact spacings. For example, large workpieces require a larger spacing to cover a sufficient detection area, while smaller spacing is more suitable for small or complex-shaped workpieces.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a universal contact for a magnetic particle flaw detector is designed, including a mounting plate. A groove is provided at the bottom of the mounting plate. A threaded rod is provided inside the groove. Opposite threads are provided at both ends of the threaded rod. A movable block passes through both ends of the threaded rod, and the threaded rod is connected to the threaded hole in the movable block. A universal joint is installed at the bottom of the movable block. A contact assembly is provided at the bottom of the universal joint. A quick-release assembly is installed on the surface of the universal joint.

[0007] Preferably, the contact assembly includes a slot, one end of which is inserted into the slot, and the other end of the insert plate is fixed to the contact body.

[0008] Preferably, the bottom of the contact body is provided with a groove, a support rod is provided inside the groove, and a rotating wheel passes through the outside of the support rod.

[0009] Preferably, the quick-release assembly includes a fixed cylinder, which is installed at one end of the universal joint. A pull rod is provided at one end of the fixed cylinder, and a movable rod is fixed inside the fixed cylinder.

[0010] Preferably, a spring passes through the outside of the movable rod, and a movable plate is fixed to one end of the movable rod inside the fixed cylinder. A limit rod is fixed to the end of the movable plate away from the movable rod, and one end of the limit rod extends into a limit hole opened on the side of the plate.

[0011] Preferably, one end of the threaded rod passes through the mounting plate and is connected to a drive motor, and the drive motor is mounted on the side of the mounting plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model combines a threaded rod, threads, and moving blocks. A drive motor drives the threaded rod, which has opposite threads on its surface. Simultaneously, two moving blocks move in opposite directions, allowing direct adjustment of the distance between the two universal contacts. This enables targeted spacing adjustments based on actual testing conditions, such as different sizes and shapes of workpieces or adjustments to the magnetic field coverage. This improves the adjustability of the universal contacts and solves the problem of fixed spacing in traditional magnetic particle flaw detectors. The fixed spacing affects the effective width and strength of the magnetic field; too short a spacing concentrates the magnetic field but limits the detection range, while too long a spacing increases the magnetic field coverage but weakens the magnetic field strength, affecting detection sensitivity. Furthermore, different sizes and shapes of workpieces require different contact spacings. For example, large workpieces require a larger spacing to cover a sufficient detection area, while smaller spacing is more suitable for small or complex-shaped workpieces.

[0014] 2. This utility model combines a fixed cylinder, a pull rod, and a spring. When the universal contact needs to be removed, simply pull out the pull rod. The pull rod will drive the moving plate to compress the spring, thereby causing the limiting rod to move out of the limiting insertion hole. This allows for convenient assembly and disassembly of the universal contact. At the same time, when the insert plate at the top of the universal contact is inserted into the slot, the spring force will directly drive the limiting rod to automatically extend into the limiting insertion hole, improving the convenience of assembling and disassembling the universal contact. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the disassembly of the universal joint and contact of this utility model;

[0017] Figure 3 This is a schematic diagram of the threaded rod structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the quick-assembly and disassembly components of this utility model;

[0019] In the diagram: 1. Mounting plate; 2. Drive motor; 201. Moving block; 202. Universal joint; 203. Contact body; 204. Groove; 205. Rotary wheel; 206. Slot; 207. Thread; 208. Insert plate; 209. Limiting insertion hole; 210. Threaded rod; 3. Fixed cylinder; 301. Pull rod; 302. Moving rod; 303. Spring; 304. Limiting insertion rod; 305. Moving plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Example 1: A universal contact for a magnetic particle flaw detector, see [link to example]. Figures 1 to 4 The system includes a mounting plate 1 with a groove 204 at its bottom. A threaded rod 210 is housed inside the groove 204, and opposite threads 207 are formed at both ends of the threaded rod 210. Moving blocks 201 penetrate both ends of the threaded rod 210, connecting the threaded rod 210 to threaded holes in the moving blocks 201. A universal joint 202 is mounted at the bottom of the moving blocks 201, with a contact assembly at its bottom and a quick-release assembly on its surface. The mounting plate 1 is first installed with the mounting frame of the magnetic particle flaw detector. After installation, when flaw detection is performed, the drive motor 2 can be started. The drive motor 2 will rotate the threaded rod 210. Because the threaded rod 210 has opposite threads 207, its rotation will cause the two moving blocks 201 to move in opposite directions. This invention utilizes the movable block 201 to directly adjust the spacing between the two universal contacts, enabling targeted spacing adjustments based on actual inspection conditions, such as different sizes and shapes of workpieces or adjustments to the magnetic field coverage. This improves the adjustability of the universal contacts and solves the problem of fixed spacing in traditional magnetic particle flaw detectors. The fixed spacing affects the effective width and strength of the magnetic field; too short a spacing results in a concentrated magnetic field but a limited detection range, while too long a spacing increases the magnetic field coverage but weakens the magnetic field strength, affecting detection sensitivity. Furthermore, different sizes and shapes of workpieces require different contact spacings. For example, large workpieces require a larger spacing to cover a sufficient inspection area, while smaller spacing is more suitable for small or complex-shaped workpieces.

[0022] For details, see Figure 2 The contact assembly includes a slot 206, into which one end of an insert plate 208 is inserted, and the other end of the insert plate 208 is fixed with a contact body 203.

[0023] Further, see Figure 1 The bottom of the contact body 203 has a groove 204, a support rod is provided inside the groove 204, and a rotating wheel 205 passes through the outside of the support rod.

[0024] It is worth noting that, see Figure 4 The quick-release assembly includes a fixed cylinder 3, which is installed at one end of the universal joint 202. A pull rod 301 is provided at one end of the fixed cylinder 3, and the pull rod 301 extends into the fixed cylinder 3 to fix a movable rod 302.

[0025] It is worth noting that, see Figure 4A spring 303 passes through the exterior of the movable rod 302. A movable plate 305 is fixed to one end of the movable rod 302 inside the fixed cylinder 3. A limiting rod 304 is fixed to the end of the movable plate 305 away from the movable rod 302. One end of the limiting rod 304 extends into a limiting insertion hole 209 on the side of the insertion plate 208. When it is necessary to remove the universal contact, simply pull out the pull rod 301. The pull rod 301 will drive the movable rod 302. 2 will cause the movable plate 305 to move by compressing the spring 303. The movable plate 305 will cause the limiting rod 304 to move out of the limiting hole 209, thereby directly and conveniently disassembling and assembling the universal contact. At the same time, when the insert plate 208 on the top of the universal contact is inserted into the slot 206, the elastic force of the spring 303 can directly drive the movable plate 305 to move, thereby causing the limiting rod 304 to automatically extend into the limiting hole 209, improving the convenience of disassembling and assembling the universal contact.

[0026] It is worth mentioning that, see Figure 3 One end of the threaded rod 210 passes through the mounting plate 1 and is connected to the drive motor 2, which is mounted on the side of the mounting plate 1.

[0027] When using a universal joint for a magnetic particle flaw detector, first install the mounting plate 1 onto the mounting bracket of the magnetic particle flaw detector. After installation, when flaw detection is performed, the drive motor 2 can be started. The drive motor 2 will drive the threaded rod 210 to rotate. Since the surface of the threaded rod 210 is provided with opposite threads 207, when the threaded rod 210 rotates, it will drive the two moving blocks 201 to move in opposite directions. Thus, the distance between the two universal joints can be directly adjusted using the moving blocks 201. This allows the universal joints to be adjusted according to the actual detection conditions, such as workpieces of different sizes and shapes, or adjusting the magnetic field coverage range, thereby improving the performance of the universal joints. The adjustable nature of the universal contact allows for easy removal of the universal contact by simply pulling out the lever 301. The lever 301 then moves the moving rod 302, which in turn moves the moving plate 305 to press against the spring 303. The moving plate 305 then moves the limiting rod 304 out of the limiting socket 209, allowing for convenient assembly and disassembly of the universal contact. Furthermore, when the insert plate 208 at the top of the universal contact is inserted into the slot 206, the spring force of the spring 303 directly moves the moving plate 305, causing the limiting rod 304 to automatically extend into the limiting socket 209, further enhancing the ease of assembly and disassembly of the universal contact.

[0028] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

Claims

1. A universal contact for a magnetic particle flaw detector, comprising a mounting plate (1), characterized in that, The mounting plate (1) has a groove (204) at the bottom. A threaded rod (210) is provided inside the groove (204). The two ends of the threaded rod (210) have opposite threads (207). A moving block (201) passes through both ends of the threaded rod (210). The threaded rod (210) is connected to the threaded hole in the moving block (201). A universal joint (202) is installed at the bottom of the moving block (201). A contact assembly is provided at the bottom of the universal joint (202). A quick-release assembly is installed on the surface of the universal joint (202).

2. The universal contact for a magnetic particle flaw detector as described in claim 1, characterized in that, The contact assembly includes a slot (206), into which one end of a insert plate (208) is inserted, and the other end of the insert plate (208) is fixed with a contact body (203).

3. The universal contact for a magnetic particle flaw detector as described in claim 2, characterized in that, The bottom of the contact body (203) is provided with a groove (204), a support rod is provided inside the groove (204), and a rotating wheel (205) passes through the outside of the support rod.

4. The universal contact for a magnetic particle flaw detector as described in claim 1, characterized in that, The quick-release assembly includes a fixed cylinder (3), which is installed at one end of the universal joint (202). A pull rod (301) is provided at one end of the fixed cylinder (3), and the pull rod (301) extends into the fixed cylinder (3) and a movable rod (302) is fixed thereon.

5. The universal contact for a magnetic particle flaw detector as described in claim 4, characterized in that, A spring (303) passes through the outside of the movable rod (302). A movable plate (305) is fixed at one end of the movable rod (302) inside the fixed cylinder (3). A limiting rod (304) is fixed at the end of the movable plate (305) away from the movable rod (302). One end of the limiting rod (304) extends into the limiting insertion hole (209) opened on the side of the insertion plate (208).

6. The universal contact for a magnetic particle flaw detector as described in claim 1, characterized in that, One end of the threaded rod (210) passes through the mounting plate (1) and is connected to a drive motor (2). The drive motor (2) is mounted on the side of the mounting plate (1).

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