Direct-current arc isolating device for photovoltaic MC4 connector

Abstract

The invention discloses a direct-current arc partition device for a photovoltaic MC4 connector, which belongs to the technical field of photovoltaic equipment and comprises a hollow quartz tempered glass tube. The two ends of the quartz tempered glass tube are respectively provided with a high-temperature-resistant silica gel plug, and a through hole is formed in the middle of each high-temperature-resistant silica gel plug. The MC4 connector of the photovoltaic cable is arranged in the quartz tempered glass tube, so that the electric arc generated by the photovoltaic cable can be effectively controlled in the quartz tempered glass tube, the electric arc is enabled to be burnt in the quartz tempered glass tube and not to be diffused to an external area, and the fire risk caused by MC4 can be effectively inhibited. Even if the photovoltaic direct-current cable is burnt and falls off, no conductive risk exists, and the two ends are sealed by the high-temperature-resistant silica gel plugs, so that a good waterproof effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic equipment, and in particular to a direct current arc isolating device for a photovoltaic MC4 joint. Background Art

[0002] The photovoltaic MC4 joint is the most fire-prone location in the entire photovoltaic system. Long-term exposure to air, aging, high temperature, loose connection, untimely maintenance, etc. will cause the MC4 joint to produce arcs. The instantaneous temperature of the arc can reach up to 4000 degrees Celsius, which can cause all combustible materials to burn, causing great safety hazards. Therefore, it is necessary to develop a DC arc interrupter for photovoltaic MC4 connector to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a DC arc interrupter device for a photovoltaic MC4 connector.

[0004] In order to achieve the above object, the present invention provides the following technical solutions: Furthermore, a DC arc isolating device for a photovoltaic MC4 connector includes a hollow quartz tempered glass tube; a high-temperature resistant silicone plug is provided at each end of the quartz tempered glass tube, and a through hole is opened in the middle of the high-temperature resistant silicone plug.

[0005] The beneficial effects of the present invention are: This application can effectively control the arc generated by the photovoltaic cable in the quartz tempered glass tube by setting the MC4 connector of the photovoltaic cable in the quartz tempered glass tube, so that the arc burns completely in the quartz tempered glass tube and does not spread to the outside area, which can effectively suppress the fire risk caused by MC4. Even if the photovoltaic DC cable burns and falls off, there will be no risk of conduction. The two ends are sealed with high-temperature resistant silicone plugs, which can achieve a good waterproof effect.

[0006] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of a DC arc interrupter device for a photovoltaic MC4 connector shown in the present invention; Figure 2 It is a left view of a DC arc interrupter device for a photovoltaic MC4 connector shown in the present invention.

[0008] Figure numerals: 1. Quartz tempered glass tube; 2. High temperature resistant silicone plug; 3. Through hole. DETAILED DESCRIPTION

[0009] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0010] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0011] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0012] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0013] See also Figure 1~Figure 2 The present application provides a DC arc isolating device for a photovoltaic MC4 connector, comprising a hollow quartz tempered glass tube 1; a high-temperature resistant silicone plug 2 is provided at each end of the quartz tempered glass tube 1, and a through hole 3 is opened in the middle of the high-temperature resistant silicone plug 2. Example

[0014] The present application includes a hollow quartz tempered glass tube 1 with a length of 180MM, a diameter of 32MM, a wall thickness of 4MM, and an inner diameter of 24MM, with high-temperature resistant silicone plugs 2 at both ends. There is a 6MM hole in the middle of the silicone plug, which is suitable for the insertion of photovoltaic cables.

[0015] Working principle: First, plug the high-temperature resistant silicone plugs 2 at both ends of the quartz tempered glass tube 1 respectively, and then insert the photovoltaic cable through the through hole 3 on the high-temperature resistant silicone plug 2 at one end of the quartz tempered glass tube 1, and then pass it out from the through hole 3 on the high-temperature resistant silicone plug 2 at the other end of the quartz tempered glass tube 1. At this time, the MC4 connector of the photovoltaic cable is retained in the quartz tempered glass tube 1.

[0016] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0017] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A DC arc interrupter for a photovoltaic MC4 connector, characterized in that: It comprises a hollow quartz tempered glass tube; both ends of the quartz tempered glass tube are respectively provided with a high-temperature resistant silicone plug, and a through hole is opened in the middle of the high-temperature resistant silicone plug.

Images