Clamp and waveguide detection equipment thereof

Abstract

The invention belongs to the technical field of cable detection, and particularly relates to a clamp and waveguide detection equipment thereof. A clamp is used for clamping a waveguide mechanism, and the clamp comprises a cylinder body which is used for accommodating and fixing the waveguide mechanism; the arc-shaped tool is arranged at the detection end of the waveguide mechanism; wherein the arc-shaped tool is provided with an arc-shaped binding face, and the arc-shaped binding face is used for enabling the detection end of the waveguide mechanism to be tightly attached to the surface of the cable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cable detection, and particularly relates to a clamp and waveguide detection equipment thereof. BACKGROUND

[0002] In modern urban power distribution networks, 10kV cables are important carriers for power transmission, and the safety and stability of their operation are crucial to the normal operation of the entire power grid. Cable accessories, such as intermediate joints and terminal heads, are key components in cable lines. However, due to their complex structure, high installation process requirements, and the dual effects of electric field stress and mechanical stress during long-term operation, they are also the weakest link that is most prone to failure. Manufacturing process defects, improper installation, or long-term operation aging can all cause internal defects such as air gaps, cracks, and impurities in cable accessories. These defects can cause partial discharge, gradually developing into insulation deterioration or even breakdown accidents, seriously threatening the safety and stability of power grid operation.

[0003] To ensure the safe operation of cable lines, regular detection of cable accessories is needed to timely discover and address potential defects. In the prior art, common detection methods include infrared temperature measurement, ultrasonic detection, and oscillating wave detection. However, these methods generally have limited sensitivity, making it difficult to effectively identify early-stage minor defects inside cable accessories, or they require power line de-energization, affecting the continuity and reliability of power supply. In contrast, electromagnetic wave detection technology has great potential in identifying early-stage minor defects due to its strong penetration, sensitivity to dielectric property changes, and ability to achieve online detection. However, current electromagnetic wave detection methods typically involve holding the detection probe directly and placing its end close to the surface of the cable accessory for measurement. Since the probe end is usually a flat structure, while the cable accessory surface is cylindrical, this mismatch in geometry makes it difficult for the probe to form a stable and tight fit with the accessory surface. In actual operation, the posture, angle, and pressure applied by the detection personnel holding the probe constantly change due to random arm shaking and force variation, which severely affects the accuracy, repeatability, and reliability of electromagnetic wave reflection signal collection, and further reduces the precision of defect positioning. SUMMARY

[0004] The present application provides a clamp and waveguide detection equipment thereof, aiming to ensure that a stable, reliable, and consistent physical contact between the detection probe and the cylindrical surface of the cable accessory can be formed during electromagnetic wave detection, thereby eliminating or reducing human-induced uncertainties such as random deflection of the probe posture, uneven contact pressure, and displacement of the contact position caused by handheld operation, and significantly improving the collection quality of electromagnetic wave detection signals and the precision of defect positioning, to meet the demand for high-precision early-stage defect diagnosis of cable accessories.

[0005] The first aspect is a clamp, which adopts the following technical solutions:

[0006] A clamp is used for clamping a waveguide mechanism, and the clamp comprises:

[0007] a barrel for accommodating and fixing the waveguide mechanism; and

[0008] an arc-shaped tool arranged at a detection end of the waveguide mechanism;

[0009] wherein the arc-shaped tool is provided with a circular-arc-shaped fitting surface for closely fitting the detection end of the waveguide mechanism with the surface of the cable.

[0010] Further, the waveguide mechanism comprises a waveguide probe and a waveguide line interface, the waveguide probe is fixedly connected with the waveguide line interface, and the waveguide line interface is used for externally connecting a waveguide cable.

[0011] Further, when the clamp is adapted to a rectangular waveguide probe mechanism, the waveguide mechanism further comprises a base, the waveguide probe is installed on the base, the base is fixedly connected with one end of the barrel, the waveguide probe extends outward from the other end of the barrel, the arc-shaped tool is fixed on both sides of the detection end of the rectangular waveguide probe, and the bottom of the arc-shaped tool is connected with the barrel through a barrel cover.

[0012] Further, the arc-shaped edge of the arc-shaped tool is flush with the detection end of the waveguide probe, and the thickness of the arc-shaped tool is the same as the width of the rectangular waveguide probe.

[0013] Further, when the clamp is adapted to a cylindrical waveguide mechanism, the waveguide probe is inserted into the barrel and fixed at the front end opening of the barrel through a first fastener.

[0014] Further, the arc-shaped tool is a set structure, which is sleeved and fixed on the detection end of the waveguide probe and fixed with the outer wall of the waveguide probe through a second fastener.

[0015] Further, the rear end of the barrel is connected with a bottom cover, and the bottom cover is provided with a through hole for leading out the waveguide line.

[0016] Further, the barrel and / or the arc-shaped tool is made of stainless steel material or high-hardness polymer plastic material.

[0017] Further, the wall thickness of the barrel and / or the wall thickness of the arc-shaped tool is 2-3 mm.

[0018] The second aspect is a waveguide detection device, which adopts the following technical solutions:

[0019] A waveguide detection device comprises a waveguide mechanism and a clamp for clamping the waveguide mechanism to detect electromagnetic wave of a cable accessory.

[0020] Advantages of the present application:

[0021] The clamp provided by the present application is adapted to the curvature radius of the outer cylindrical surface of the cable accessory, and is combined with a cylinder for accommodating and fixing the waveguide mechanism. The structure forms a large-area and stable surface contact between the circular-arc fitting surface and the cylindrical surface of the cable accessory, completely changing the unstable state of point or line contact between the handheld probe and the surface of the accessory in the prior art, and ensuring that the detection end of the waveguide mechanism can always be closely fitted to the measured surface in a correct posture. The physical coupling of the structure significantly reduces the human error caused by hand shaking, uneven force or angle deviation of the operator, greatly improves the accuracy, signal-to-noise ratio and repeatability of electromagnetic wave signal acquisition, and effectively improves the identification ability, diagnosis reliability and positioning accuracy of early micro-defects in the cable accessory by providing high-quality and high-stability original detection signals. In addition, the structure is simple and easy to operate, reduces the skill requirement for the detection personnel, and makes the high-precision electromagnetic wave nondestructive testing technology more valuable for on-site promotion and application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 Front view of the clamp adapted to the rectangular waveguide mechanism of the present embodiment;

[0023] Fig. 2 Sectional view of the clamp adapted to the rectangular waveguide mechanism of the present embodiment;

[0024] Fig. 3 Top view of the clamp adapted to the rectangular waveguide mechanism of the present embodiment;

[0025] Fig. 4 Front view of the clamp adapted to the cylindrical waveguide mechanism of the present embodiment;

[0026] Fig. 5 Sectional view of the clamp adapted to the cylindrical waveguide mechanism of the present embodiment;

[0027] Fig. 6 Top view of the clamp adapted to the cylindrical waveguide mechanism of the present embodiment;

[0028] Reference signs: 100, clamp; 110, cylinder; 111, cylinder cover; 112, first fastener; 113, bottom cover; 120, arc-shaped tooling; 121, fitting surface; 122, second fastener; 200, waveguide mechanism; 210, waveguide probe; 220, waveguide line interface; 230, base. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the drawings, and the described embodiments should not be regarded as limiting the present application. All other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as understood by those skilled in the art to which the embodiments of the present application belong. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

[0031] Those skilled in the art should understand that in the following description of the embodiments of the present application, the order of the serial numbers does not mean the order of execution, and some or all steps can be executed in parallel or in sequence, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0032] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0033] The present embodiment provides a clamp 100 for clamping a waveguide mechanism 200, the clamp 100 comprising:

[0034] a barrel 110 for accommodating and fixing the waveguide mechanism 200; and

[0035] an arc-shaped tool 120 arranged at a detection end of the waveguide mechanism 200;

[0036] The arc-shaped tool 120 is provided with a circular-arc-shaped fitting surface 121 for tightly fitting the detection end of the waveguide mechanism 200 with the surface of the cable.

[0037] In some embodiments, the waveguide mechanism 200 comprises a waveguide probe 210 and a waveguide line interface 220, the waveguide probe 210 being fixedly connected with the waveguide line interface 220, and the waveguide line interface 220 being used for externally connecting a waveguide cable.

[0038] In some embodiments, when the clamp 100 is fitted to the rectangular waveguide probe 210 mechanism, the waveguide mechanism 200 further comprises a base 230, on which the waveguide probe 210 is installed; the base 230 is fixedly connected to one end of the barrel 110, and the waveguide probe 210 extends outward from the other end of the barrel 110, and the arc-shaped tooling 120 is fixed to both sides of the detection end of the rectangular waveguide probe 210, and the bottom of the arc-shaped tooling 120 is connected to the barrel 110 through the barrel cover 111.

[0039] In some embodiments, the arc-shaped edge of the arc-shaped tooling 120 is flush with the detection end of the waveguide probe 210, and the thickness of the arc-shaped tooling 120 is the same as the width of the rectangular waveguide probe 210.

[0040] Please refer to Figs. 1 to 3 The embodiment provides a clamp 100 for clamping a rectangular waveguide probe 210 mechanism.

[0041] The clamp 100 of the embodiment comprises a barrel 110 and an arc-shaped tooling 120. The barrel 110 is a barrel 110, which is designed to facilitate the operator to hold, and is used to accommodate and fix the waveguide mechanism 200. The arc-shaped tooling 120 is arranged at the detection end of the waveguide mechanism 200. The core is that the arc-shaped tooling 120 is provided with a circular arc-shaped fitting surface 121, and the curvature radius of the fitting surface 121 is optimized and designed to be matched with the outer cylindrical surface radius of the target detection object (such as a 10kV cable accessory), so that the detection end of the waveguide mechanism 200 can form a stable and close physical fitting with the cable surface during detection.

[0042] Specifically, the waveguide mechanism 200 comprises a rectangular waveguide probe 210 and a waveguide line interface 220, which is used to connect an external waveguide cable to transmit electromagnetic wave signals. In the embodiment, the rectangular waveguide probe 210 mechanism further comprises a probe base 230, on which the rectangular waveguide probe 210 is installed.

[0043] During assembly, the probe base 230 is aligned with the rear end of the barrel 110. Then, the two are tightly connected through a plurality of base 230 bolts, so that the entire waveguide mechanism 200 is stably installed on the barrel 110. At this time, the main body part of the rectangular waveguide probe 210 extends outward from the front end of the barrel 110. The front end of the barrel 110 is provided with a barrel cover 111, and the arc-shaped tooling 120 is fixed to both sides of the detection end of the rectangular waveguide probe 210. In order to ensure the stability of the structure, the bottom of the arc-shaped tooling 120 is connected to the barrel cover 111, which can be integrally formed or fixed by means of gluing and the like.

[0044] In order to achieve the best detection effect, the arc-shaped edge of the arc-shaped tool 120 is designed to be flush with the port of the rectangular waveguide probe 210, ensuring effective coupling of energy. At the same time, the thickness of the arc-shaped tool 120 is designed to be the same as the width of the rectangular waveguide probe 210, ensuring structural consistency and stability.

[0045] In some embodiments, when the clamp 100 is fitted to the cylindrical waveguide mechanism 200, the waveguide probe 210 is inserted into the barrel 110 and fixed at the front end opening of the barrel 110 by the first fasteners 112.

[0046] In some embodiments, the arc-shaped tool 120 is a set structure that is sleeved and fixed to the detection end of the waveguide probe 210 and is fixed to the outer wall of the waveguide probe 210 by the second fasteners 122.

[0047] In some embodiments, the rear end of the barrel 110 is connected with a bottom cover 113, and the bottom cover 113 is provided with a through hole for leading out the waveguide line.

[0048] In some embodiments, the barrel 110 and / or the arc-shaped tool 120 are made of stainless steel material or high-hardness polymer plastic material.

[0049] In some embodiments, the wall thickness of the barrel 110 and / or the wall thickness of the arc-shaped tool 120 is 2-3 mm.

[0050] Please refer to Figs. 4 to 6 The embodiment provides a clamp 100 for clamping a cylindrical waveguide probe 210 mechanism.

[0051] When the clamp 100 is fitted to the cylindrical waveguide mechanism 200, the fixing mode is different. The cylindrical waveguide probe 210 of the waveguide mechanism 200 is directly inserted into the inner cavity of the barrel 110. In order to achieve stable fixation, the first fasteners 112 (such as 4 radially distributed bolts) are arranged at the front end opening of the barrel 110. By tightening these first fasteners 112, the inserted cylindrical waveguide probe 210 can be locked from the radial direction, preventing it from shaking or rotating during operation.

[0052] Unlike the above specific embodiments, the arc-shaped tool 120 here is a separate set structure. The set structure is sleeved on the detection end of the waveguide probe 210. In order to achieve fixation, the lower part of the arc-shaped tool 120 is provided with second fasteners 122 (such as 4 bolts), and by tightening these second fasteners 122, it can be firmly fixed to the outer wall of the waveguide probe 210.

[0053] In order to protect the internal wiring and provide certain support, the rear end of the barrel 110 is connected with a bottom cover 113 through bolts. The center of the bottom cover 113 is provided with a through hole, and the diameter of the through hole is slightly larger than the diameter of the internal waveguide. The waveguide is led out from the through hole, and the through hole not only provides an outlet for the waveguide, but also plays a certain limiting role, reduces the swing amplitude of the waveguide at the root of the probe, and thus reduces the risk of wear in long-term use.

[0054] In any of the above embodiments, in order to balance strength, durability and lightness, the barrel 110 and / or the arc-shaped tooling 120 can be made of stainless steel material or high-hardness engineering polymer plastic (such as polycarbonate PC, ABS, etc.). These materials have good mechanical properties and chemical stability. At the same time, in order to reduce the weight as much as possible under the premise of ensuring the structural strength, facilitate handheld operation, the wall thickness of the barrel 110 and / or the wall thickness of the arc-shaped tooling 120 is preferably between 2mm and 3mm.

[0055] The embodiment provides a waveguide detection device, which comprises a waveguide mechanism 200 and a clamp 100 for clamping the waveguide mechanism 200 to detect the cable accessory.

[0056] Referring to Figs. 1 to 6 The embodiment provides a complete waveguide detection device. The device comprises the clamp 100 of any of the above embodiments, and the waveguide mechanism 200 matched with the clamp 100. In actual use, an operator selects the corresponding clamp 100 and waveguide mechanism 200 for assembly according to the type of the cable accessory to be detected and the type (rectangular or cylindrical) of the waveguide probe 210 used. After assembly, the waveguide mechanism 200 is connected with an external signal generating, data collecting and analyzing unit through the waveguide line interface 220. When operating, the operator holds the clamp 100, and the arc-shaped tooling 120 at the front end of the clamp 100 is attached to the surface of the cable accessory, and stable and reliable electromagnetic wave nondestructive detection can be started. The device significantly improves the accuracy and repeatability of field detection through the structural optimization of the clamp 100.

[0057] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A clamp characterized in that, The clamp is used to hold the waveguide mechanism, and the clamp includes: A cylindrical body, the cylindrical body being used to house and secure the waveguide mechanism; and An arc-shaped fixture is disposed at the detection end of the waveguide mechanism; The arc-shaped tooling is provided with an arc-shaped contact surface, which is used to ensure that the detection end of the waveguide mechanism is in close contact with the surface of the cable.

2. A clamp according to claim 1, wherein The waveguide mechanism includes a waveguide probe and a waveguide interface. The waveguide probe is fixedly connected to the waveguide interface, and the waveguide interface is used to connect an external waveguide cable.

3. A fixture according to claim 2, wherein When the fixture is adapted to the rectangular waveguide probe mechanism, the waveguide mechanism further includes a base, and the waveguide probe is mounted on the base; the base is fixedly connected to one end of the cylinder, the waveguide probe extends outward from the other end of the cylinder, the arc-shaped fixture is fixed on both sides of the detection end of the rectangular waveguide probe, and the bottom of the arc-shaped fixture is connected to the cylinder through a cylinder cover.

4. A clamp according to claim 3, wherein The arc-shaped edge of the arc-shaped fixture is flush with the detection end of the waveguide probe, and the thickness of the arc-shaped fixture is the same as the width of the rectangular waveguide probe.

5. The fixture of claim 2 wherein, When the clamp is adapted to the cylindrical waveguide mechanism, the waveguide probe is inserted into the cylinder and fixed to the front opening of the cylinder by the first fastener.

6. A clamp according to claim 5, wherein The arc-shaped fixture is a set structure that is fitted and fixed to the detection end of the shaped waveguide probe, and is fixed to the outer wall of the waveguide probe by a second fastener.

7. A clamp according to claim 6, wherein The rear end of the cylinder is connected to a bottom cover, and the bottom cover has a through hole for leading out the waveguide wire.

8. The fixture of claim 1 wherein, The cylinder and / or the arc-shaped tooling are made of stainless steel or high-hardness polymer plastic.

9. The fixture of claim 1 wherein, The wall thickness of the cylinder and / or the wall thickness of the arc-shaped tooling is 2mm-3mm.

10. A waveguide detection device, characterized by, It includes a waveguide mechanism and a clamp as described in any one of claims 1 to 9, the clamp being used to hold the waveguide mechanism for electromagnetic wave detection of cable accessories.

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