Photovoltaic box transformer substation iron core insulation detection device

Abstract

The utility model discloses a photovoltaic box transformer substation iron core insulation detection device, which belongs to the technical field of iron core detection, and comprises a megohmmeter and two detection heads distributed front and back, the two detection heads are electrically connected with two to-be-detected ends of the megohmmeter through wires, the top of each detection head is provided with a connecting strip, the connecting strips are made of flexible materials, and the connecting strips are connected with the megohmmeter through wires. The detection head is connected to the middle of the connecting strip, and the two ends of the connecting strip are provided with adsorption assemblies used for being adsorbed to the iron core. According to the utility model, the adsorption assemblies capable of being adsorbed on the iron core are arranged on the two sides of the detection head, and the detection head is fixed on the iron core through the adsorption assemblies, so that the purpose of fixing the detection head aiming at the large iron core is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron core detection, in particular to an insulation detection device for the iron core of a photovoltaic box transformer. Background Technique

[0002] With the rapid development of photovoltaic technology, the photovoltaic box transformer, as an important device in a photovoltaic power station, plays a crucial role in the power generation efficiency and safety of the entire power station. The iron core of the transformer inside the photovoltaic box transformer is its core component, and the insulation performance of the iron core directly affects the operation stability and service life of the transformer.

[0003] Due to the large size of the iron core of the transformer inside the photovoltaic box transformer, there are certain difficulties in operating traditional insulation detection tools such as megohmmeters. A megohmmeter is a commonly used electrical measuring instrument for measuring the insulation resistance of electrical equipment. However, the two terminals to be detected of a megohmmeter are generally provided with metal clips. This clip design is more suitable for relatively small electrical equipment components. However, when faced with the large iron core inside the photovoltaic box transformer, the metal clips cannot effectively hold it, resulting in the inability to fix the two detection heads of the megohmmeter on the iron core for insulation detection. Summary of the Utility Model

[0004] The utility model provides an insulation detection device for the iron core of a photovoltaic box transformer, which can effectively fix the two detection heads of a megohmmeter on a large iron core.

[0005] The utility model is realized through the following technical solutions.

[0006] An insulation detection device for the iron core of a photovoltaic box transformer includes a megohmmeter and two detection heads arranged front and back. Both detection heads are electrically connected to the two terminals to be detected of the megohmmeter through wires. A connecting strip is arranged at the top of the detection head. The connecting strip is made of a flexible material. The detection head is connected to the middle of the connecting strip. Adsorption components for adsorbing on the iron core are arranged at both ends of the connecting strip.

[0007] Further, the adsorption component includes a magnetic sheet, and the magnetic sheet is fixed at the connecting end of the connecting strip.

[0008] Further, the adsorption component includes a suction cup, and the suction cup is fixed at the connecting end of the connecting strip.

[0009] Further, the adsorption component includes an adhesive layer, and the adhesive layer is arranged at the connecting end of the connecting strip.

[0010] Further, the connecting strip and the detection head are connected through a cap.

[0011] Further, the detection head is fixed inside the cap, and an opening for the wire to pass through is provided on the side wall of the cap.

[0012] Furthermore, a threaded post is fixed to the top of the cap, a through hole communicating up and down is formed in the middle of the connecting strip, and the upper end of the threaded post independently passes through the through hole and is connected with a nut in threaded fit therewith.

[0013] Furthermore, anti-slip lines are provided on the outer side wall of the nut.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By providing adsorption components capable of adsorbing on the iron core on both sides of the detection head, the detection head is fixed on the iron core through the adsorption components, so as to fix the detection head for a large iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is Figure 1 the right view of

[0018] Figure 3 is a three-dimensional structural diagram of the present utility model;

[0019] Figure 4 is an exploded view of the present utility model;

[0020] Figure 5 is a usage state diagram of the present utility model.

[0021] Names of each component in the figure: 1, detection head; 2, magnetic adsorption sheet; 3, connecting strip; 4, threaded post; 5, wire; 6, nut; 7, cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the structures involved in the present utility model or the technical terms used therein. These descriptions are only examples to illustrate how the present utility model is implemented and cannot constitute any limitation to the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left" and "right" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] A kind of insulating detection device for the core of a photovoltaic box transformer described in this embodiment, as Figure 5 shown, includes a megohmmeter and two detection heads 1 distributed front and back. The megohmmeter is a prior art, mainly composed of a housing, a movement, a battery, etc. The main function of the megohmmeter is to measure the insulation resistance of electrical equipment. In the power system, the insulation resistance is an important parameter to measure the insulation performance of equipment, which can reflect the protection ability of the equipment against electric shock under normal operation or fault conditions. Therefore, by measuring the insulation resistance of the equipment with a megohmmeter, potential insulation defects can be detected in time, and corresponding maintenance or replacement measures can be taken to ensure the safe operation of the equipment. Both of the two detection heads 1 are electrically connected to the two terminals to be detected of the megohmmeter through wires 5. The detection head 1 can be made of copper and has good electrical conductivity.

[0026] As Figures 1 to 4 shown, a connecting strip 3 is arranged at the top of the detection head 1. The connecting strip 3 is made of a flexible material, such as silicone or cloth material. The detection head 1 is connected to the middle of the connecting strip 3. The connecting strip 3 and the detection head 1 are connected through a cap 7. The detection head 1 is fixed in the cap 7. An opening for the wire 5 to pass through is provided on the side wall of the cap 7; the cap 7 is made of plastic material. The detection head 1 is in a cylindrical structure, and the cap 7 is in a circular structure. The detection head 1 is snapped into the cap 7 and has an interference fit with the inner side wall of the cap 7, so that the two are connected. The wire 5 passes through the opening of the cap 7. A threaded post 4 is fixed at the top of the cap 7. A through hole communicating up and down is provided in the middle of the connecting strip 3. The upper end of the threaded post 4 independently passes through the through hole and is connected with a nut 6 in a threaded fit; a threaded blind hole in threaded fit with the threaded post 4 is provided at the center of the nut 6. During use, after the threaded post 4 passes through the through hole in the middle of the connecting strip 3, the connecting strip 3 is clamped between the cap 7 and the nut 6 by using the nut 6 to complete the connection. Anti-slip lines are provided on the outer side wall of the nut 6; it is convenient to rotate the nut 6.

[0027] Both ends of the connecting bar 3 are provided with magnetic attraction sheets 2 for adsorbing on the iron core. The magnetic attraction sheets 2 are fixed at the connecting ends of the connecting bar 3. The magnetic attraction sheets 2 are fixed at the connecting ends of the connecting bar 3 by adhesives. During use, both ends of the connecting bar 3 are adsorbed on the iron core through the magnetic attraction sheets 2, and the detection head 1 is fixed on the iron core for insulation detection. In addition to the magnetic attraction sheets 2, the connecting bar 3 and the iron core can also be adsorbed through adsorption components such as suction cups or adhesive layers. The suction cup is a vacuum suction cup. The service life of the adhesive layer is short and it is usually for one-time use. Since the connecting bar 3 provided with the adhesive layer is a disposable item, its material can be made of spandex cloth with low production cost. During use, according to the actual situation, choose to adsorb with the magnetic attraction sheets 2, suction cups or adhesive layers, and the replacement is also relatively simple. Just remove the nut 6 and replace the connecting bar 3 with different adsorption components.

[0028] During the actual use process: Each of the two detection ends of the megohmmeter is connected with a detection head 1. During detection, one detection head 1 is fixed on the winding of the iron core through the magnetic attraction sheet 2 and the connecting bar 3, and the other detection head 1 is fixed on the metal shell of the iron core. Then shake the handle of the megohmmeter and observe the insulation performance through its dial. The megohmmeter belongs to the prior art, and the specific use process and working principle will not be introduced in detail. Since the iron core in the photovoltaic box transformer is relatively large in size, the detection head 1 is adsorbed on the iron core through the adsorption component to complete the detection of the insulation performance.

[0029] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic box-type transformer core insulation detection device, comprising a megohmmeter and two detection heads (1) distributed front and back. Both of the two detection heads (1) are electrically connected to two to-be-detected ends of the megohmmeter through wires (5), and it is characterized in that: A connecting strip (3) is provided at the top of the detection head (1). The connecting strip (3) is made of a flexible material. The detection head (1) is connected to the middle of the connecting strip (3). Adsorption components for adsorbing on the iron core are provided at both ends of the connecting strip (3).

2. The photovoltaic box-type transformer core insulation detection device according to claim 1, wherein: The adsorption component includes a magnetic attraction sheet (2), and the magnetic attraction sheet (2) is fixed to the connecting end of the connecting strip (3).

3. The photovoltaic box-type transformer core insulation detection device according to claim 1, characterized in that: The adsorption component includes a suction cup, and the suction cup is fixed to the connecting end of the connecting strip (3).

4. The photovoltaic box-type substation iron core insulation detection device according to claim 1, wherein: The adsorption component includes an adhesive layer, and the adhesive layer is provided at the connecting end of the connecting strip (3).

5. The photovoltaic box-type transformer core insulation detection device according to claim 1, wherein: The connecting strip (3) and the detection head (1) are connected through a cap (7).

6. The photovoltaic box-type transformer core insulation detection device according to claim 5, characterized in that: The detection head (1) is fixed in the cap (7), and an opening for a wire (5) to pass through is formed in the side wall of the cap (7).

7. The photovoltaic box-type transformer core insulation detection device according to claim 5, characterized in that: A threaded post (4) is fixed to the top of the cap (7). A through hole communicating up and down is formed in the middle of the connecting strip (3). The upper end of the threaded post (4) independently passes through the through hole and is connected with a nut (6) in threaded cooperation therewith.

8. The photovoltaic box-type transformer core insulation detection device according to claim 7, characterized in that: Anti-slip lines are provided on the outer side wall of the nut (6).

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