Protective device with waterproof function of MC4 photovoltaic connector for photovoltaic power station

Abstract

The utility model provides a photovoltaic power station MC4 photovoltaic connector waterproof function protection device, which comprises an upper shell and a lower shell, the upper shell and the lower shell surround the MC4 photovoltaic connector, and the upper shell and the lower shell are detachably connected together through a buckle structure. The left side and the right side of the upper shell and the lower shell are provided with sealing rings for direct current cables on the two sides of the photovoltaic connector to penetrate through, the upper shell and the lower shell are provided with glue injection openings for injecting waterproof glue, and the glue injection openings are correspondingly provided with glue injection opening covers. The device can provide excellent waterproof protection for the MC4 photovoltaic connector, and through double waterproof measures of arranging the sealing ring in the connecting structure of the upper shell and the lower shell and injecting the waterproof glue, water can be effectively prevented from entering the MC4 photovoltaic connector even under severe weather conditions such as rainstorm and flood.

Description

TECHNICAL FIELD

[0001] The utility model relates to MC4 photovoltaic connector protection technical field, concretely relates to a photovoltaic power station is with MC4 photovoltaic connector waterproof function's protection device. BACKGROUND

[0002] MC4 photovoltaic connector (Multi-Contact 4mm2) is a kind of power connector, which is developed by Multi-Contact of Germany, and it is a kind of fast, simple and safe connection mode, widely used in solar industry. The use method of MC4 photovoltaic connector is to connect the cable with male and female heads respectively, and then plug the male and female heads, until they are engaged together. When MC4 photovoltaic connector is located in buried condition, due to the reasons such as defects in connector manufacturing, tension caused by soil deposition, etc., the male and female heads of MC4 photovoltaic connector may have gaps, which may cause MC4 photovoltaic connector to leak water. Even without gaps, the commonly used MC4 photovoltaic connector has a protection level of IP65, i.e. the waterproof level is 5, which cannot be used in water environment for a long time.

[0003] Currently, MC4 photovoltaic connector is commonly used to handle branch disconnection and branch grounding fault in the operation and maintenance process of photovoltaic power station. Its application scenario is that after the maintenance personnel troubleshoot the fault branch, the fault section is cut off, and then the new DC cable is connected by MC4 photovoltaic connector. Therefore, if the MC4 photovoltaic connector as the cable connection place is in the water seepage environment for a long time, it may cause the cable to be grounded, which may cause the branch fault to occur repeatedly, and is not conducive to the handling and recovery of faults and defects, and affects the power generation efficiency of photovoltaic power station and increases the difficulty of power station operation and maintenance. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiencies of prior art, and provides a photovoltaic power station is with MC4 photovoltaic connector waterproof function's protection device.

[0005] The specific technical scheme is as follows:

[0006] A kind of photovoltaic power station is with MC4 photovoltaic connector waterproof function's protection device, comprising: upper shell and lower shell, the upper shell and lower shell are surrounded in MC4 photovoltaic connector, and the upper shell and lower shell are detachably connected together by buckle structure, the left and right sides of the upper shell and lower shell are provided with sealing ring for the DC cable of the two sides of photovoltaic connector to pass through, the upper shell, lower shell is provided with glue injection port for injecting waterproof glue, the glue injection port is provided with glue injection port cover correspondingly.

[0007] Optionally, the upper shell and the lower shell form a buckle structure by male buckle and female buckle to connect.

[0008] Optionally, the number of male buckles and female buckles in the buckle structure is two, and they are symmetrically distributed on both sides of the upper shell and the lower shell, which can ensure the stability of the connection and prevent the protection device from being accidentally loosened during use.

[0009] Optionally, the glue injection port and the glue injection port cover are connected through an annular clamping structure.

[0010] Optionally, the sealing ring is made of soft silicone material, and the sealing ring is recessed in the middle.

[0011] Optionally, the upper shell and the lower shell are completely consistent in structure.

[0012] Optionally, the upper shell, the lower shell and the glue injection port cover are all made of plastic material.

[0013] Optionally, the inner diameter of the glue injection port is designed to be compatible with the glue injection nozzle of standard glue injection equipment, so as to facilitate the smooth operation of glue injection.

[0014] Optionally, the upper shell and the lower shell are integrally formed by using a mold during the manufacturing process.

[0015] Optionally, the width of the recessed middle part of the sealing ring matches the outer diameter of the DC cable.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. In the utility model, by setting the upper shell, the lower shell, the sealing ring and the glue injection port cover, the possibility of injecting waterproof glue is realized, the sealing of the waterproof glue is ensured, and the waterproof ability of the MC4 photovoltaic connector is enhanced. The buckle between the upper shell and the lower shell is a dead buckle structure and does not fall off, has high strength, ensures the overall sealing, and can normally carry out the burying work after injecting the waterproof glue without waiting for the super-long time of the waterproof glue solidification. Moreover, the buckle structure is simple and fast to install, has extremely low technical difficulty, and improves the fault handling efficiency.

[0018] 2. In the utility model, the sealing ring is added on both sides of the upper shell and the lower shell, the sealing ring is made of soft silicone material, can easily deform, can tightly fit the extended DC cable, on one hand, protects the cable and can be bent at a large angle, on the other hand, increases the sealing of the device arrangement, prevents the cable from having a gap with the shell due to factors such as cable thickness and cable bending, and further causes the leakage of waterproof glue.

[0019] 3. In the utility model, the upper shell and the lower shell are only different in text description, and the structures of the two are completely consistent. Since the male buckle and the female buckle are centrally symmetrically arranged, the upper shell and the lower shell do not need to be distinguished during use, which is convenient and fast, and avoids the loss of one half of the device, which causes the other half to be unable to be used. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic view of the protection device for waterproof function of the MC4 photovoltaic connector of the photovoltaic power station of the utility model;

[0021] Figure 2 It is the whole structure schematic view of the upper shell and the lower shell in the protection device for waterproof function of the MC4 photovoltaic connector of the photovoltaic power station of the utility model;

[0022] Figure 3 It is the internal section structure schematic view of the protection device for waterproof function of the MC4 photovoltaic connector of the photovoltaic power station of the utility model;

[0023] Figure 4 It is Figure 3 It is the enlarged structure schematic view of the letter A in the middle;

[0024] Figure 5 It is the side view structure schematic view of the upper shell and the lower shell in the protection device for waterproof function of the MC4 photovoltaic connector of the photovoltaic power station of the utility model.

[0025] In the drawing: 1, upper shell; 2, lower shell; 3, sealing ring; 4, glue injection port cover; 5, glue injection port; 6, male buckle; 7, female buckle. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0028] The utility model will be further described below with reference to the drawings and specific embodiments, but not as the limitation of the utility model.

[0029] The protection device for waterproof function of the MC4 photovoltaic connector of the photovoltaic power station provided in the utility model, with reference to Figures 1-5The utility model relates to a waterproof device for MC4 photovoltaic connector, including: upper shell 1 and lower shell 2, upper shell 1 and lower shell 2 surround the MC4 photovoltaic connector, and upper shell 1 and lower shell 2 are detachably connected together through buckle structure, and the left and right sides of upper shell 1 and lower shell 2 are provided with sealing ring 3 for the DC cable of photovoltaic connector to pass through two sides, and the upper shell 1, lower shell 2 are provided with glue injection port 5 for injecting waterproof glue, and the glue injection port 5 is provided with glue injection port cover 4 correspondingly.

[0030] First, upper shell 1 and lower shell 2 are detachably connected through buckle structure, before connecting upper shell 1 and lower shell 2, need to place MC4 photovoltaic connector between the two proper positions, glue injection port 5 is located on upper shell 1 and lower shell 2, and it is connected with corresponding glue injection port cover 4 through specific connecting structure. When sealing, waterproof glue is injected into the gap between upper shell 1, lower shell 2 and MC4 photovoltaic connector through glue injection port 5 using special glue injection equipment, because the position of glue injection port 5 is reasonably designed, can make waterproof glue evenly fill each sealing part. In the process of injecting, sealing ring 3 plays the role of double sealing, on the one hand, prevents the injected waterproof glue from seeping out from the gap between cable and shell, on the other hand, also prevents the moisture from the outside from entering the inside, and glue injection port cover 4 is tightly connected with glue injection port 5, prevents the overflow of waterproof glue from glue injection port 5 before solidification, and after solidification, can also effectively prevent the moisture from entering from glue injection port 5. The device can provide excellent waterproof protection for MC4 photovoltaic connector, through the sealing ring 3 in the connecting structure of upper shell 1 and lower shell 2, and the double waterproof measures of injecting waterproof glue, even in severe weather conditions, such as heavy rain, flood, etc., can effectively prevent the moisture from entering the inside of MC4 photovoltaic connector. It is crucial for photovoltaic power station, because the invasion of moisture can cause the short circuit, corrosion of MC4 photovoltaic connector, thereby influence the power generation efficiency and safety of whole photovoltaic power station.

[0031] Specifically, refer to Figure 1 , Figure 2 and Figure 5The upper shell 1 and the lower shell 2 are connected by the snap structure formed by the male buckle 6 and the female buckle 7. The male buckle 6 has a specific protruding shape, and the female buckle 7 has a matching recessed shape. During installation, the male buckle 6 of the upper shell 1 is aligned with the female buckle 7 of the lower shell 2, and then appropriate pressure is applied. The male buckle 6 can be smoothly inserted into the female buckle 7. Due to the high degree of shape matching between the male buckle 6 and the female buckle 7, this plug-in connection method can tightly combine the two. The number of male buckles 6 and female buckles 7 in the snap structure is two, and they are symmetrically distributed on both sides of the upper shell 1 and the lower shell 2. This symmetrical distribution design is based on the principle of mechanics. When there are connection points on both sides, the force can be evenly distributed on the entire connection structure. For example, when subjected to external tension, pressure or vibration, the male buckles 6 and female buckles 7 on both sides can share these forces together, avoiding loosening or damage of the connection structure due to excessive local stress.

[0032] Referring to Figures 3-4 The glue injection port 5 and the glue injection port cover 4 are connected by the annular clamping structure. The glue injection port 5 has an outwardly protruding annular edge, and the glue injection port cover 4 has a corresponding inwardly recessed annular clamping groove. During installation of the glue injection port cover 4, the annular clamping groove of the glue injection port cover 4 is aligned with the annular edge of the glue injection port 5, and then it is gently pressed or rotated (according to the specific design) to embed the annular edge into the clamping groove, thereby achieving a tight connection between the two. When the glue injection port cover 4 is clamped with the glue injection port 5, the annular contact interface can effectively prevent the waterproof glue from leaking out of the gap between the glue injection port 5 and the glue injection port cover 4 during the glue injection process. This is because the annular structure can evenly disperse the pressure, so that the entire connection interface can maintain a tight fit state, preventing glue leakage.

[0033] The sealing ring 3 is made of soft silicone material, and the sealing ring 3 is recessed in the middle. Soft silicone material has good flexibility and elasticity. Due to its molecular structure, soft silicone can deform to a large extent when subjected to external force without breaking. The recessed middle of the sealing ring 3 is designed based on the adaptability to the DC cable. During manufacturing, a specific mold forming process is used to form the recessed shape of the sealing ring 3. When the DC cable passes through the sealing ring 3, the recessed middle of the sealing ring 3 matches the outer diameter of the cable. This matching relationship allows the sealing ring 3 to tightly wrap around the cable, and the elasticity of the soft silicone forms a sealed barrier around the cable. At the same time, the soft silicone material itself has good sealing performance, which can effectively prevent moisture, dust and other impurities from entering the inside of the protection device from the gap between the cable and the shell.

[0034] In addition, the upper shell 1 and the lower shell 2 are completely consistent in structure. In the design stage, the unified structure design can reduce the design complexity, and facilitate the engineering drawing, mold design and other work. From the manufacturing process point of view, the consistency is conducive to the use of the same production equipment and process parameters for processing and manufacturing.

[0035] The upper shell 1, the lower shell 2 and the glue injection port cover 4 are all made of plastic material. The plastic has good formability, and the upper shell 1, the lower shell 2 and the glue injection port cover 4 can be manufactured by a mold integrated molding process. At the same time, the plastic material is relatively light. In the photovoltaic power station, the lighter protection device will not bring too much additional load to the supporting structure, which is conducive to the stability of the entire photovoltaic power station structure.

[0036] The inner diameter of the glue injection port 5 is designed to be adaptable to the glue injection nozzle of the standard glue injection equipment, so as to facilitate the smooth operation of the glue injection operation.

[0037] The upper shell 1 and the lower shell 2 are integrally formed by a mold integrated molding process in the manufacturing process. Since it is integrally formed, there is no weak link that may be caused by welding, splicing and other connection methods, such as stress concentration at the welding position, sealing problem at the splicing position and the like. The integrally formed shell is more uniform in mechanical properties, and can better withstand various stresses such as external pressure, tension and the like.

[0038] Principle of implementation: the example is a waterproof protection device for MC4 photovoltaic connector. The upper shell 1 and the lower shell 2 are connected by a buckle structure, the sealing ring 3 is installed on both sides of the upper shell 1 and the lower shell 2, the glue injection port cover 4 is connected with the glue injection port 5 through the annular clamping structure, and the glue injection port 5 is integrally formed with the upper shell 1. In use, the MC4 photovoltaic connector is first made, and the upper shell 1 and the lower shell 2 are buckled. In this process, the DC cable passes through the sealing ring 3, and then the glue injection port cover 4 is opened, the waterproof glue is injected from the glue injection port 5, and the glue injection port cover is pressed down after being filled to complete the sealing, and then the normal burying work is carried out.

[0039] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change made by applying the contents of the present application specification and drawings should be included in the protection scope of the present application.

Claims

1. A protection device for waterproof function of MC4 photovoltaic connector for photovoltaic power station, characterized in that, The utility model relates to a waterproof protection device for MC4 photovoltaic connector, which comprises: An upper shell and a lower shell, which surround the MC4 photovoltaic connector and are detachably connected together through a buckle structure, and the left and right sides of the upper shell and the lower shell are provided with sealing rings for the DC cables on both sides of the photovoltaic connector to pass through, and the upper shell and the lower shell are provided with glue injection ports for injecting waterproof glue, and the glue injection ports are correspondingly provided with glue injection port covers.

2. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The upper shell and the lower shell are connected through male and female buckles to form a buckle structure.

3. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 2, characterized in that, The number of male and female buckles in the buckle structure is two, and they are symmetrically distributed on both sides of the upper shell and the lower shell, which can ensure the stability of the connection and prevent the protection device from being accidentally loosened during use.

4. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The glue injection port and the glue injection port cover are connected through an annular clamping structure.

5. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The sealing ring is made of soft silicone material and is recessed in the middle.

6. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The upper shell and the lower shell are completely consistent in structure.

7. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The upper shell, the lower shell, and the glue injection port cover are all made of plastic material.

8. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The inner diameter of the glue injection port is designed to be compatible with the glue injection nozzle of standard glue injection equipment, so as to facilitate the smooth operation of glue injection.

9. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The upper shell and the lower shell are integrally formed by using a mold during manufacturing.

10. The waterproof function protection device for MC4 photovoltaic connector of photovoltaic power station according to claim 1, characterized in that, The width of the recessed middle part of the sealing ring matches the outer diameter of the DC cable.

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