A handheld magnetic ultrasonic probe

Abstract

This utility model relates to the technical field of sensor probe holding devices, specifically a handheld magnetic ultrasonic probe, including an ultrasonic probe, a holding rod, an outer casing, a switch, an extension cable, and a spring. The outer casing is hinged to one end of the holding rod; one end of the spring is fixed to the lower top surface of the outer casing; a connecting top cover is fixed to the other end of the spring; a switch is fixed to the other end of the holding rod; an electromagnet is fixed to the bottom of the outer casing, and the switch is connected to the electromagnet via the extension cable; the ultrasonic probe is fixed to the bottom of the connecting top cover, and a magnetic shield is threadedly connected to the bottom of the connecting top cover. A signal line cover and a limiting post are threadedly connected to one side of the upper part of the magnetic shield. The ultrasonic probe's circuitry is connected to the measuring instrument via the signal line cover on one side. The electromagnet cover is attracted by the outer casing of the measuring box, thus receiving stable pressure from the ultrasonic probe. The spring inside the electromagnet cover compresses the ultrasonic probe, causing it to fit tightly against the outer casing of the measuring box, reducing the labor intensity of the operator.

Description

Technical Field

[0001] This utility model relates to the technical field of sensor probe holding devices, specifically a handheld magnetic ultrasonic probe. Background Technology

[0002] High-voltage metering boxes consist of electricity meters, switches, and voltage and current transformers. When poor contact occurs at the equipment's contacts, partial discharge occurs. The molecules in the discharge area collide violently, generating pressure waves (ultrasound), typically in the frequency range of 20kHz to 1MHz. These waves propagate through solids (cabinets) or air. Piezoelectric sensors capture the ultrasonic signals transmitted through the solid by contacting the cabinet surface. Because ultrasonic partial discharge testing has extremely strong anti-electromagnetic interference capabilities, high positioning accuracy, and uses non-invasive detection, it is highly safe and therefore commonly used. The ultrasonic probe is manually moved every 0.3m on the surface of the metering box, and then a partial discharge instrument is used to determine whether partial discharge has occurred internally. Currently, the ultrasonic probe is held by a handle or long rod and attached to the outer shell of the high-voltage metering box for measurement.

[0003] In actual work, the following problems exist when using ultrasonic probes for detection: 1. The force applied when holding the ultrasonic probe cannot be consistent, which will generate different interference noise, which will have a significant impact on the measurement data and is very easy to cause misjudgment; 2. The long-term process of holding the ultrasonic probe close to the high-voltage metering box increases the workload of the staff. Utility Model Content

[0004] The purpose of this invention is to provide a handheld magnetic ultrasonic probe to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A handheld magnetic ultrasonic probe includes an ultrasonic probe and a grip rod, as well as an outer casing, a switch, an extension cable, and a spring. One end of the grip rod is hinged to the outer casing; one end of the spring is fixed to the lower top surface of the outer casing; a connecting top cover is fixed to the other end of the spring; a switch is fixed to the other end of the grip rod; an electromagnet is fixed to the bottom of the outer casing, and the extension cable connects the switch and the electromagnet; the ultrasonic probe is fixed to the bottom of the connecting top cover, and a magnetic shield is threadedly connected to the bottom of the connecting top cover. A signal cable cover is threadedly connected to one side of the upper part of the magnetic shield, and the ultrasonic probe is electrically connected to a measuring instrument via the signal cable cover.

[0007] As a further preferred embodiment, the upper part of the magnetic shielding cover is threaded with a limiting post on the side away from the signal line cover, and longitudinal limiting grooves are provided on both sides of the outer cover. The signal line cover and the limiting post are slidably connected to the limiting grooves to limit the spring compression pop-out position, avoid the spring force deviation, resulting in uneven pressure, and at the same time avoid the spring being over-compressed or stretched, reducing its service life.

[0008] As a further preferred embodiment, the gripping rod includes a rotating rod, a telescopic rod, and a support rod. The inner wall of the support rod is fixed with an insulating rubber protrusion. The telescopic rod is inserted into the support rod, and its outer wall is provided with a protrusion. The rotating rod is rotatably connected to the telescopic rod, and the inner wall of the telescopic rod is provided with a groove for limiting the rotation range of the rotating rod, thereby enabling the gripping rod to extend, retract, and be fixed.

[0009] As a further preferred option, the gripping part of the gripping rod is fixed with an insulating rubber sleeve to improve safety.

[0010] As a further preferred embodiment, the magnetic shielding cover is cylindrical.

[0011] As a further preferred option, the signal line housing and magnetic shield are made of permalloy, which further reduces the impact of the magnetic field on the ultrasonic probe.

[0012] As a further preferred option, the middle section of the extension line is a spiral, which facilitates the adjustment of the length in conjunction with the extension and retraction of the grip rod.

[0013] As a further preferred embodiment, the magnetic shielding cover has a grounding wire led out from the signal line housing, and the magnetic shielding cover is grounded through the grounding wire, which further improves the magnetic shielding effect.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the electromagnet cover is attracted by the outer shell of the measuring box, so that it is subjected to stable pressure from the ultrasonic probe, thereby increasing the measurement stability; the ultrasonic probe is squeezed by the spring inside the electromagnet cover, so that the ultrasonic probe is tightly attached to the outer shell of the measuring box without the need to apply additional pressure to the ultrasonic probe, thus reducing the labor intensity of the staff. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the structure of a handheld magnetic ultrasonic probe according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the rotating self-locking telescopic rod in this embodiment.

[0018] Figure 3 for Figure 2 Sectional view at point BB.

[0019] Figure 4 for Figure 2 Sectional view at point AA.

[0020] Figure 5 This is a schematic diagram of the outer casing in this embodiment.

[0021] Figure 6 This is a schematic diagram of the demagnetizing cover in this embodiment.

[0022] In the diagram: 1. Switch, 2. Extension cord, 3. Ultrasonic probe, 4. Signal cable housing, 5. Holding rod, 6. Outer housing, 7. Spring, 8. Magnetic shield, 9. Connecting top cover, 10. Electromagnet, 11. Limiting post, 12. Measuring instrument, 501. Rotating rod, 502. Telescopic rod, 503. Support rod, 601. Limiting groove. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] See Figure 1 As shown, a handheld magnetic ultrasonic probe includes an ultrasonic probe 3 and a grip rod 5, as well as an outer casing 6, a switch 1, an extension cable 2, and a spring 7. One end of the grip rod 5 is hinged to the outer casing 6; one end of the spring 7 is welded to the lower top surface of the outer casing 6; a connecting top cover 9 is welded to the other end of the spring 7; the switch 1 is fixed to the other end of the grip rod 5; an electromagnet 10 is welded to the bottom of the outer casing 6, and the switch 1 is connected to the electromagnet 10 through the extension cable 2; the ultrasonic probe 3 is threaded to the bottom end of the connecting top cover 9, and a magnetic shield 8 is threaded to the bottom of the connecting top cover 9; a signal line cover 4 is threaded to one side of the upper part of the magnetic shield 8, and the ultrasonic probe 3 is electrically connected to a measuring instrument 12 via the signal line cover 4.

[0025] In the operation of this utility model, the electromagnet 10 of switch 1 attracts the outer shell 6 to the measuring box to be tested. Under the compression of spring 7, the ultrasonic probe 3 comes into contact with the surface of the measuring box, and the ultrasonic partial discharge test is carried out by repeatedly opening and closing the switch.

[0026] like Figure 5 and Figure 6As shown in this embodiment of the present invention, a limiting post 11 is threadedly connected to one side of the upper part of the magnetic shielding cover 8, and longitudinal limiting grooves 601 are provided on both sides of the outer cover 6. The signal line cover 4 and the limiting post 11 are slidably connected to the limiting grooves 601 to limit the compression and pop-out position of the spring 7, so as to avoid the spring 7 from deviating in force, resulting in uneven pressure, and at the same time to avoid the spring 7 from being over-compressed or stretched, reducing its service life. The magnetic shielding cover 8 is cylindrical, and the signal line cover 4 and the magnetic shielding cover 8 are made of permalloy, which further reduces the influence of the magnetic field on the ultrasonic probe 3.

[0027] During the operation of this utility model, the threaded connection between the signal line cover 4 and the limiting post 11 facilitates disassembly and connection between the ultrasonic probe 3 and the connecting top cover 9.

[0028] During the operation of this utility model, the magnetic shield 8 made of permalloy allows most of the magnetic field lines to pass through the magnetic shield 8, thereby reducing the magnetic influence in the cavity inside the magnetic shield 8.

[0029] like Figures 2-4 As shown in the embodiment of this utility model, the gripping rod 5 includes a rotating rod 501, a telescopic rod 502, and a support rod 503. The inner wall of the support rod 503 is fixed with an insulating rubber protrusion. The telescopic rod 502 is inserted into the support rod 503, and the outer wall of the telescopic rod 502 is provided with a protrusion. The rotating rod 501 is rotatably connected to the telescopic rod 502. The inner wall of the telescopic rod 502 is provided with a groove for limiting the rotation range of the rotating rod 501, which is used to realize the extension and fixation of the gripping rod 5. As a further preferred embodiment, the gripping part of the gripping rod 5 is fixed with an insulating rubber sleeve, and the middle section of the extension line 2 is a spiral, which facilitates the adjustment of the length of the gripping rod 5 with extension and retraction.

[0030] like Figure 6 As shown in this embodiment of the invention, the magnetic shielding cover 8 is grounded via the signal line housing 4, and the magnetic shielding cover 8 is grounded through the grounding wire, thereby further improving the magnetic shielding effect.

[0031] During the operation of this utility model, the insulating rubber protrusions are used for friction positioning after the telescopic rod 502 is extended, and the rotating rod 501 and the hinged outer casing 6 are used to improve the flexibility of detection.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A handheld magnetic ultrasonic probe, comprising an ultrasonic probe and a grip rod, characterized in that: It also includes an outer casing, a switch, an extension cable, and a spring. One end of the grip rod is hinged to the outer casing; one end of the spring is fixed to the lower top surface of the outer casing; a connecting top cover is fixed to the other end of the spring; a switch is fixed to the other end of the grip rod; an electromagnet is fixed to the bottom of the outer casing, and the extension cable is used to connect the switch and the electromagnet; an ultrasonic probe is fixed to the bottom of the connecting top cover, a magnetic shield is threaded to the bottom of the connecting top cover, a signal line cover is threaded to one side of the upper part of the magnetic shield, and the ultrasonic probe is electrically connected to the measuring instrument via the signal line cover.

2. The handheld magnetic ultrasonic probe according to claim 1, characterized in that: The upper part of the magnetic shielding cover is threaded with a limiting post on the side away from the signal line cover. The outer cover has longitudinal limiting grooves on both sides. The signal line cover and the limiting post are slidably connected to the limiting grooves.

3. The handheld magnetic ultrasonic probe according to claim 1, characterized in that: The gripping rod includes a rotating rod, a telescopic rod, and a support rod. The inner wall of the support rod is fixed with an insulating rubber protrusion. The telescopic rod is inserted into the support rod and has a protrusion on its outer wall. The rotating rod is rotatably connected to the telescopic rod, and the inner wall of the telescopic rod has a groove for limiting the rotation range of the rotating rod.

4. A handheld magnetic ultrasonic probe according to claim 1, characterized in that: An insulating rubber sleeve is fixed to the gripping part of the gripping rod.

5. A handheld magnetic ultrasonic probe according to claim 1, characterized in that: The magnetic shield is cylindrical.

6. A handheld magnetic ultrasonic probe according to claim 1, characterized in that: The signal line housing and magnetic shield are made of permalloy.

7. A handheld magnetic ultrasonic probe according to claim 1, characterized in that: The middle section of the extension line is a spiral.

8. A handheld magnetic ultrasonic probe according to claim 1, characterized in that: The magnetic shielding cover has a grounding wire led out from the signal line cover, and the magnetic shielding cover is grounded through the grounding wire.

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