Archimedes spiral antenna for switch cabinet UHF sensor

Abstract

The utility model discloses an Archimedes helical antenna for a switch cabinet UHF sensor, which comprises a circular base disc, a helical antenna I and a helical antenna II which are arranged at the top of the circular base disc, the antenna I and the antenna II are symmetrically designed, the outer ends of the antenna I and the antenna II are both provided with wave extension sections, and the Archimedes helical antenna also comprises a pressing mechanism, pressing mechanisms are arranged at the tail ends, opposite to the two wave extension sections, of the surface of the circular base disc, and each pressing mechanism comprises a side seat fixed to the circumferential surface of the circular base disc and a pressing block movably installed at the top of the side seat; according to the utility model, the two-arm structure of the Archimedes helical antenna in the prior art is optimized, the perimeter of the outer ring of the antenna is increased under the condition that the size of the antenna is fixed, and the low-frequency-band parameters of the antenna are optimized, so that the Archimedes helical antenna with wide working frequency band and low standing-wave ratio is obtained; the optimized Archimedes helical antenna is suitable for an ultrahigh frequency sensor for detecting partial discharge of a distribution network switch cabinet, and the installation stability is high.

Description

Technical Field

[0001] This utility model belongs to the field of partial discharge detection technology for switchgear, specifically relating to an Archimedes spiral antenna for UHF sensors in switchgear. Background Technology

[0002] With the continuous development of power systems, high-voltage switchgear has been widely used as a key component. However, due to its small internal space, complex structure, and small insulation distance, high-voltage switchgear is more prone to insulation defects than other power equipment, which can lead to partial discharge faults. Therefore, effective monitoring of it is particularly important. Partial discharge detection technology is an important means to ensure the safe and stable operation of power equipment. Among them, ultra-high frequency (UHF) detection technology has gradually become the mainstream method for partial discharge detection due to its high sensitivity and anti-interference ability. As the core component of this technology, the performance of UHF sensors directly affects the accuracy and reliability of detection.

[0003] However, the existing Archimedean spiral antennas used for UHF sensors in switchgear are too large and not suitable for installation. If the size is reduced, the low-frequency parameters of the antenna will not meet the requirements, and it will be unable to meet the performance requirements of wide bandwidth, high gain and small size. Therefore, this utility model proposes an Archimedean spiral antenna for UHF sensors in switchgear. Utility Model Content

[0004] The purpose of this invention is to provide an Archimedes spiral antenna for a UHF sensor in a switch cabinet, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an Archimedean spiral antenna for a UHF sensor in a switchgear, comprising...

[0006] A circular base plate, and two antennas, one and two, mounted on top of the circular base plate in a spiral shape. The antennas are designed symmetrically, and both antennas have wavy extension sections at their outer ends.

[0007] Preferably, it also includes a clamping mechanism, wherein the surface of the circular base plate is provided with a clamping mechanism at the ends of the two wave extension sections.

[0008] Preferably, the clamping mechanism includes a side seat fixed on the circumferential surface of the circular base plate, a clamping block movably mounted on the top of the side seat, and the end of the clamping block extends to the top of the wave extension section to clamp and limit the end of the wave extension section.

[0009] Preferably, the side seat has an inner sliding groove, and a spring and an inner slider are provided in the inner sliding groove. The inner slider slides within the inner sliding groove, and a connecting rod is fixed to the top of the inner slider. The top end of the connecting rod extends through to the top of the side seat and is fixed to the clamping block.

[0010] Preferably, the bottom end of the spring abuts against the top surface of the inner slider, and the other end of the spring abuts against the inner wall of the top of the inner groove.

[0011] Preferably, the top surface of the side seat has a rod hole corresponding to the connecting rod, and the rod hole communicates with the inner sliding groove.

[0012] Preferably, a clamping pad is embedded in the bottom surface of the clamping block, and the bottom surface of the clamping pad has a clamping notch adapted to the wave extension section.

[0013] Preferably, the clamping block has side openings on both ends of its surface.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model optimizes the two-arm structure of the Archimedean spiral antenna in the prior art, increases the outer circumference of the antenna under the condition of a certain antenna size, and optimizes the low-frequency parameters of the antenna to obtain an Archimedean spiral antenna with a wider operating frequency band and a lower VSWR. The optimized Archimedean spiral antenna is suitable for ultra-high frequency sensors for detecting partial discharge in distribution network switch cabinets, and has high installation stability. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the structure of antenna one of this utility model;

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

[0018] Figure 4 This is a side sectional view of the clamping mechanism of this utility model;

[0019] In the diagram: 1. Antenna 1; 2. Antenna 2; 3. Wave extension section; 4. Circular base plate; 5. Pressing mechanism; 51. Side seat; 52. Inner slide groove; 53. Inner slider; 54. Spring; 55. Connecting rod; 56. Pressing block; 57. Pressing pad; 58. Pressing notch; 59. Side chuck. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figures 1 to 3 This is the first embodiment of the present invention, which provides a technical solution: an Archimedean spiral antenna for a UHF sensor in a switch cabinet, comprising...

[0023] The circular base plate 4 is equipped with two spiral antennas, antenna 1 and antenna 2, which are mounted on the top of the circular base plate 4. Antenna 1 and antenna 2 are designed symmetrically. The outer ends of antenna 1 and antenna 2 are provided with wave extension sections 3, which can increase the circumference of the outer ring of the antenna while keeping the overall size of the antenna. This optimizes the low-frequency parameters of the antenna and results in an Archimedean spiral antenna with a wide operating frequency band and a low VSWR.

[0024] In this invention, since the phase characteristics of the current at the outer ends of antenna 1 and antenna 2 remain unchanged, the sinusoidal loading of the outermost spiral will not damage the gain and directivity of the Archimedes spiral antenna.

[0025] Example 2

[0026] Please see Figures 1 to 4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the stability of the two antenna wave extension sections 3 can be ensured by the clamping mechanism 5, and the ends can be prevented from curling up.

[0027] Specifically, it also includes a clamping mechanism 5. The surface of the circular base plate 4 is provided with a clamping mechanism 5 at the ends of the two wave extension sections 3. The clamping mechanism 5 includes a side seat 51 fixed on the circumferential surface of the circular base plate 4 and a clamping block 56 movably installed on the top of the side seat 51. The end of the clamping block 56 extends to the top of the wave extension section 3 to clamp and limit the end of the wave extension section 3, which can ensure the stability of the end of the wave extension section 3.

[0028] In this embodiment, preferably, an inner groove 52 is provided in the side seat 51, and a spring 54 and an inner slider 53 are provided in the inner groove 52. The inner slider 53 slides in the inner groove 52, and a connecting rod 55 is fixed to the top of the inner slider 53. The top end of the connecting rod 55 extends through to the top of the side seat 51 and is fixed to the pressing block 56. Under the pushing of the spring 54, it is ensured that the pressing block 56 can be stably pressed on the end of the wave extension section 3 during daily use, ensuring pressing stability and preventing the end of the wave extension section 3 from tilting upward.

[0029] In this embodiment, preferably, the bottom end of the spring 54 abuts against the top surface of the inner slider 53, and the other end of the spring 54 abuts against the inner wall of the top end of the inner groove 52.

[0030] In this embodiment, preferably, the top surface of the side seat 51 is provided with a rod hole corresponding to the connecting rod 55, and the rod hole communicates with the inner sliding groove 52 to allow the connecting rod 55 to pass smoothly through.

[0031] In this embodiment, preferably, a pressing pad 57 is embedded in the bottom surface of the pressing block 56. The pressing pad 57 is made of fluororubber, and the bottom surface of the pressing pad 57 has a pressing notch 58 that matches the wave extension section 3. This allows the wave extension section 3 to be inserted into the pressing notch 58 after the end of the pressing block 56 is pressed against the top of the wave extension section 3, thereby further improving the pressing stability.

[0032] In this embodiment, preferably, the two ends of the clamping block 56 are provided with side openings 59, which facilitates the operator to lift the clamping block 56 during actual assembly. In the initial stage of assembling the wave extension section 3, the operator can lift the clamping block 56, so that the spring 54 is gradually compressed, thereby facilitating the installation of the wave extension section 3. After the installation of the wave extension section 3 is completed, the clamping block 56 is released, so that the spring 54 pushes the inner slider 53 back, so that the clamping block 56 is stably pressed on the end of the wave extension section 3.

[0033] Although embodiments of the present invention have been shown and described (see the detailed description above), 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An Archimedean spiral antenna for a UHF sensor in a switchgear, characterized in that: It includes a circular base plate (4), and two spiral antennas (1 and 2) mounted on the top of the circular base plate (4). The antennas (1 and 2) are designed symmetrically, and the outer ends of the antennas (1 and 2) are provided with wave extension sections (3).

2. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 1, characterized in that: It also includes a clamping mechanism (5), and the surface of the circular base plate (4) is provided with a clamping mechanism (5) relative to the ends of the two wave extension sections (3).

3. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 2, characterized in that: The clamping mechanism (5) includes a side seat (51) fixed on the circumferential surface of the circular base plate (4) and a clamping block (56) movably mounted on the top of the side seat (51), and the end of the clamping block (56) extends to the top of the wave extension section (3) to clamp and limit the end of the wave extension section (3).

4. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 3, characterized in that: The side seat (51) has an inner slide groove (52) inside. A spring (54) and an inner slider (53) are provided in the inner slide groove (52). The inner slider (53) slides in the inner slide groove (52), and a connecting rod (55) is fixed to the top of the inner slider (53). The top end of the connecting rod (55) extends through to the top of the side seat (51) and is fixed to the pressing block (56).

5. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 4, characterized in that: The bottom end of the spring (54) abuts against the top surface of the inner slider (53), and the other end of the spring (54) abuts against the inner wall of the top of the inner groove (52).

6. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 4, characterized in that: The top surface of the side seat (51) is provided with a rod hole corresponding to the connecting rod (55), and the rod hole communicates with the inner sliding groove (52).

7. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 3, characterized in that: A pressing pad (57) is embedded in the bottom surface of the pressing block (56), and the bottom surface of the pressing pad (57) is provided with a pressing notch (58) that is compatible with the wave extension section (3).

8. An Archimedean spiral antenna for a UHF sensor in a switchgear according to claim 3, characterized in that: The clamping block (56) has side openings (59) on both ends of its surface.

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