A junction box

Abstract

The utility model provides a kind of junction box, it is related to electrical equipment technical field, junction box includes box door and the box body with the gate of one side being equipped with, box door is used to close or open the gate of box body, the side of box body towards box door is provided with the first water baffle ring structure around gate, the side of box door towards box body is provided with second water baffle ring structure;When box door closes the gate of box body, second water baffle ring structure surrounds first water baffle, and in the thickness direction of box door, box door and first water baffle structure abut.Case door is in closed state, the second water baffle ring structure on case door surrounds first water baffle structure, and two water baffle ring structures are at least partially coincident, and then two water baffle ring structures can form double-layer water retaining structure, and water retaining effect is better, and two water baffle ring structures are in the form of ring structure and surround the gate, then all-round waterproof effect can be realized.Finally make the junction box have higher waterproof grade, can satisfy the waterproof demand under multiple scenes.

Description

Technical Field

[0001] In the field of electrical equipment technology, this utility model relates to a junction box. Background Technology

[0002] In industrial production, infrastructure construction, and civil equipment sectors, outdoor junction boxes serve as crucial components for various electrical equipment (such as oil-immersed transformers, dry-type transformers, photovoltaic inverters, communication base station equipment, and outdoor lighting control equipment). They play a vital role in protecting internal terminals, wires, and electrical accessories, ensuring stable and safe operation of wiring connections. Because these junction boxes are exposed to the outdoor environment for extended periods, they must continuously withstand the corrosive effects of rain, dew, dust, high temperatures, and low temperatures. Furthermore, during transportation, installation, and subsequent maintenance, they must endure external forces such as vibration, impact, and tensile stress. Therefore, their waterproof sealing and structural robustness are core indicators determining the overall reliability and service life of the equipment.

[0003] However, most outdoor junction boxes currently on the market have significant limitations in their structural design: In terms of waterproofing, they rely solely on a simple rain guard on the top of the box, lacking substantial waterproofing measures, making the interior susceptible to water ingress and posing a safety hazard. Furthermore, regarding structural robustness, existing outdoor junction boxes use a simplistic door fixing method, generally employing only a triangular lock as the sole locking and securing component. The triangular lock's cylinder structure is simple, and its body strength is low. Over long-term use, the lock cylinder is prone to jamming and failure due to sand and dust intrusion and rain corrosion, preventing the door from opening and closing properly. More importantly, this single triangular lock fixing method cannot withstand the severe vibrations and impacts during equipment transportation—in actual transport scenarios, factors such as vehicle bumps and loading / unloading collisions can sometimes cause the junction box door to loosen or even fall off entirely. A detached door not only exposes the internal electrical components to the external environment, subjecting them to damage from sand and rain, but also poses a safety hazard during transport, causing secondary injuries to surrounding personnel and equipment. Utility Model Content

[0004] The present invention aims to at least solve the problem of poor waterproof performance of existing outdoor junction boxes.

[0005] To address the aforementioned problems, this utility model provides a junction box, comprising a box door and a box body with an opening on one side. The box door is used to close or open the opening of the box body. A first water-blocking ring structure is provided on the side of the box body facing the box door, surrounding the opening. A second water-blocking ring structure is provided on the side of the box door facing the box body. When the box door closes the opening of the box body, the second water-blocking ring structure surrounds the first water-blocking ring, and the box door abuts against the first water-blocking ring structure in the thickness direction of the box door.

[0006] When used outdoors, the junction box provided by this utility model can be fixed to the box body with a fixing structure similar to that in the prior art when the door is closed. Because the box body has a first water-retaining ring structure and the door has a second water-retaining ring structure, the difference from the prior art lies at least in that, when the door is closed, the door tightly abuts against the first water-retaining ring structure in its thickness direction, resulting in excellent sealing and waterproofing between the door and the first water-retaining ring structure. Secondly, when the door is closed, the second water-retaining ring structure surrounds the first water-retaining ring structure, and the two water-retaining ring structures at least partially overlap, thus forming a double-layer water-retaining structure for better water-retaining effect. Furthermore, the two water-retaining ring structures are circular and surround the doorway, achieving all-around waterproofing. Ultimately, this junction box has a high waterproof rating and can meet the waterproofing requirements of various scenarios.

[0007] Furthermore, the junction box also includes a sealing structure, which is disposed between the box door and the first water-blocking ring structure, and the box door indirectly abuts against the first water-blocking ring structure through the sealing structure.

[0008] Furthermore, the sealing structure is a sealing ring or a sealing gasket, and / or the material of the sealing structure is EPDM rubber.

[0009] Furthermore, the first water-blocking ring structure and the box body are integrally formed, and / or the second water-blocking ring structure and the box door are integrally formed.

[0010] Furthermore, the junction box also includes bolts. The box body or the first water-blocking ring structure is provided with a first connecting hole, and the box door or the second water-blocking ring structure is provided with a second connecting hole. When the box door is closed, the first connecting hole and the second connecting hole are in corresponding positions, and the bolt is used to be inserted into the second connecting hole and the first connecting hole.

[0011] Furthermore, multiple first connecting holes are provided, distributed around the doorway; multiple second connecting holes are provided, arranged in a one-to-one correspondence with the multiple first connecting holes; and multiple bolts are provided, used to be inserted into the corresponding second connecting holes and first connecting holes respectively.

[0012] Furthermore, the first water-blocking ring structure includes a rectangular baffle plate, which is disposed around the edge of the doorway. When the doorway of the box is closed, the thickness direction of the rectangular baffle plate is perpendicular to the thickness direction of the doorway. The first water-blocking ring structure also includes a connecting plate located at the end of the rectangular baffle plate facing the doorway. The connecting plate is a flange structure that is provided outward from the rectangular baffle plate. When the doorway of the box is closed, the doorway abuts against the connecting plate.

[0013] Furthermore, the first connecting hole is provided on the docking plate, and the second connecting hole is provided on the box door.

[0014] Furthermore, the junction box also includes a nut, which is disposed on the side of the docking plate away from the box door, and the nut corresponds to the position of the first connection hole.

[0015] Furthermore, the junction box is a transformer junction box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the junction box according to an embodiment of the present utility model; Figure 2 This is a side view of the junction box according to an embodiment of the present utility model; Figure 3 This is an exploded view of the junction box according to an embodiment of the present utility model; Figure 4 for Figure 3 A partially enlarged structural diagram; Figure 5 This is a schematic diagram of the structure of the box body according to an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Box body; 2. Box door; 21. Second connecting hole; 3. First water-blocking ring structure; 31. Rectangular baffle; 32. Butt plate; 321. First connecting hole; 4. Second water-blocking ring structure; 5. Nut; 6. Handle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, in the attached diagram, the X-axis represents the vertical direction, that is, the front-to-back position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the back; in the attached diagram, the Y-axis represents the horizontal direction, that is, the left-to-right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up-to-down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0022] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, components, or groups of features, integers, steps, or components.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] See Figures 1-4 A junction box according to an embodiment of the present utility model includes a box door 2 and a box body 1 with a doorway on one side. The box door 2 is used to close or open the doorway of the box body 1. A first water-blocking ring structure 3 is provided on the side of the box body 1 facing the box door 2, surrounding the doorway. A second water-blocking ring structure 4 is provided on the side of the box door 2 facing the box body 1. When the box door 2 closes the doorway of the box body 1, the second water-blocking ring structure 4 surrounds the first water-blocking ring, and the box door 2 abuts against the first water-blocking ring structure 3 in the thickness direction of the box door 2.

[0027] In this embodiment, when the junction box is used outdoors, the door 2 can be fixed to the box body 1 using a fixing structure similar to that in the prior art when the door of the box body 1 is closed. Since the box body 1 is provided with a first water-blocking ring structure 3 and the door 2 is provided with a second water-blocking ring structure 4, the difference from the prior art lies at least in that, when the door 2 is closed, the door 2 is tightly abutted against the first water-blocking ring structure 3 in its thickness direction, resulting in excellent sealing and waterproofing between the door 2 and the first water-blocking ring structure 3. Secondly, when the door 2 is closed, the second water-blocking ring structure 4 surrounds the first water-blocking ring structure 3, and the two water-blocking ring structures at least partially overlap, thus forming a double-layer water-blocking structure with better water-blocking effect. Furthermore, since the two water-blocking ring structures are in a ring shape surrounding the doorway, an all-around waterproofing effect can be achieved. Ultimately, this junction box has a high waterproof rating, meeting the waterproofing requirements of various scenarios.

[0028] When the door 2 is closed, if the door 2 directly abuts against the first water-blocking ring structure 3, it can be understood that, assuming rainwater wants to enter the container 1, it can only enter through the possible gap between the door 2 and the first water-blocking ring structure 3. However, with the presence of the second water-blocking ring structure 4 in the double-layer water-blocking structure, the second water-blocking ring structure 4 can completely block the aforementioned possible gaps, thereby achieving a waterproof effect.

[0029] It should be noted that, as mentioned above, the door 2 and the body 1 can be fixed using existing fixing structures, such as using a triangular lock to fix them together.

[0030] Optionally, the junction box also includes a sealing structure (not shown in the figure), which is disposed between the box door 2 and the first water-blocking ring structure 3, and the box door 2 indirectly abuts against the first water-blocking ring structure 3 through the sealing structure.

[0031] In this embodiment, to further ensure the waterproof effect, a sealing structure is also provided between the door 2 and the first water-blocking ring structure 3. That is, when the door 2 is closed, the door 2 and the first water-blocking ring structure 3 do not directly abut against each other, but indirectly abut against each other through the sealing structure. After the door 2 is closed, the sealing structure will be compressed and deformed, thereby achieving a further sealing and waterproof effect.

[0032] Optionally, the sealing structure is a sealing ring or a sealing gasket, and / or the material of the sealing structure is EPDM rubber.

[0033] In this embodiment, the sealing structure can be a single sealing gasket or a sealing ring that matches the size and shape of the first water-blocking ring structure 3. Whether it's a sealing ring or a sealing gasket, the sealing structure can be made of EPDM rubber. This material offers excellent weather resistance: it can withstand sunlight, rain, and extreme temperatures, and can be used in environments ranging from -50℃ to 150℃. It is also UV-resistant and ozone-resistant, making it suitable for outdoor environments. It has good chemical stability: it is highly resistant to various acids, alkalis, and oils, has excellent electrical insulation properties, and also provides good waterproofing. It exhibits excellent elasticity and flexibility: its elastic recovery rate exceeds 90%, and it has high tensile strength and elongation at break, allowing it to withstand significant deformation without damage. It is also resistant to deformation or fatigue failure under long-term dynamic loads. Furthermore, it comes in various specifications: thicknesses are typically selectable between 1 mm and 50 mm, width and length can be customized, and color and hardness can also be customized according to requirements.

[0034] Optionally, the first water-blocking ring structure 3 and the box body 1 are integrally formed, and / or the second water-blocking ring structure 4 and the box door 2 are integrally formed.

[0035] In this embodiment, the first water-blocking ring structure 3 and the housing 1 are integrally molded. This reduces the number of parts needed to fix them together, avoids gaps that could leak, and improves the connection strength. Similarly, the second water-blocking ring structure 4 and the housing door 2 are also integrally molded to achieve a similar effect.

[0036] Optionally, see Figure 1 , Figures 4-5 The junction box also includes bolts (not shown in the figure). The box body 1 or the first water-blocking ring structure 3 is provided with a first connecting hole 321, and the box door 2 or the second water-blocking ring structure 4 is provided with a second connecting hole 21. When the box door 2 closes the door of the box body 1, the first connecting hole 321 and the second connecting hole 21 are in corresponding positions. The bolt is used to be inserted into the second connecting hole 21 and the first connecting hole 321.

[0037] In this embodiment, the relative fixation between the box door 2 and the box body 1 can be achieved by bolts. It is only necessary to open a first connecting hole 321 for the bolt to pass through on the box body 1 or the first water-blocking ring structure 3, and to provide a second connecting hole 21 for the bolt to pass through on the box door 2 or the second water-blocking ring structure 4.

[0038] Optionally, multiple first connection holes 321 are provided, and the multiple first connection holes 321 are distributed around the doorway. Multiple second connection holes 21 are provided, and the multiple second connection holes 21 are arranged in a one-to-one correspondence with the multiple first connection holes 321. Multiple bolts are provided, and the multiple bolts are used to be inserted into the corresponding second connection holes 21 and first connection holes 321 respectively.

[0039] In this embodiment, to ensure the stability of the door 2 after it is fixed, multiple first connecting holes 321, second connecting holes 21, and bolts are provided and distributed around the doorway. For example, the four corners of the junction between the door 2 and the box body 1 are provided with first connecting holes 321, second connecting holes 21, and bolts. Apart from the four corners, the left side of the junction between the door 2 and the box body 1 is provided with first connecting holes 321, second connecting holes 21, and bolts, the right side of the junction between the door 2 and the box body 1 is provided with first connecting holes 321, second connecting holes 21, and bolts, the upper side of the junction between the door 2 and the box body 1 is provided with first connecting holes 321, second connecting holes 21, and bolts, and the lower side of the junction between the door 2 and the box body 1 is provided with first connecting holes 321, second connecting holes 21, and bolts.

[0040] It should be noted that after the box body 1 and the box door 2 are connected by bolts, the structure is stable. Even if the junction box is transported, the box door 2 will not become loose or fall off due to bumps, loading and unloading collisions, etc.

[0041] It should be noted that after the junction box is transported to its outdoor destination and electrical components such as transformers are installed inside, the door 2 is then bolted to the box body 1. Afterward, the door 2 does not need to be opened frequently. It is generally only needed when an internal fault alarm occurs or when periodic inspections of internal components are performed. Therefore, the door 2 is opened infrequently. In this case, the bolted method of securing the door 2 to the box body 1 does not significantly affect the opening and closing efficiency of the door 2. Furthermore, compared to the time spent on internal maintenance of the box body 1, the time spent removing the bolts when opening the door 2 is minimal and negligible.

[0042] Optionally, see Figure 3-4 The first water-blocking ring structure 3 includes a rectangular baffle 31, which surrounds the edge of the doorway. When the door 2 closes the doorway of the box body 1, the thickness direction of the rectangular baffle 31 is perpendicular to the thickness direction of the doorway 2. The first water-blocking ring structure 3 also includes a connecting plate 32 located at the end of the rectangular baffle 31 facing the doorway 2. The connecting plate 32 is a flange structure that is provided outward from the rectangular baffle 31. When the doorway 2 closes the doorway of the box body 1, the doorway 2 abuts against the connecting plate 32.

[0043] In this embodiment, a rectangular baffle 31 is disposed around the edge of the doorway, and the thickness direction of the rectangular baffle 31 is perpendicular to the thickness direction of the door 2. The presence of the rectangular baffle 31 is equivalent to extending the doorway outward. In this case, the connecting plate 32 serves as the flange structure of the rectangular baffle 31, and a space can be formed between it and the box body 1. Thus, when the door 2 is closed, the door 2 can have a sufficient contact area with the connecting plate 32 in the first water-blocking ring structure 3, resulting in better sealing and stability.

[0044] Furthermore, after the door 2 is closed, the second water-blocking ring structure 4 on the door 2 can extend into the space between the connecting plate 32 and the box body 1, so that the second water-blocking ring structure 4 and the rectangular baffle 31 at least partially overlap. That is, in the thickness direction of the door 2, the second water-blocking ring structure 4 covers at least a portion of the rectangular baffle 31, thereby achieving a waterproof effect. The second water-blocking ring structure 4 can be a flanged structure on the edge of the door 2.

[0045] Optionally, see Figure 4 and Figure 5 The first connecting hole 321 is provided on the docking plate 32, and the second connecting hole 21 is provided on the box door 2.

[0046] In this embodiment, since the box door 2 is specifically in contact with the docking plate 32 in the first water-blocking ring structure 3, the first connecting hole 321 is specifically set on the docking plate 32, and the second connecting hole 21 is specifically designed on the box door 2 to facilitate the insertion of bolts.

[0047] Optionally, see Figure 4 and Figure 5 The junction box also includes a nut 5, which is located on the side of the docking plate 32 away from the box door 2, and the nut 5 corresponds to the position of the first connecting hole 321.

[0048] In this embodiment, since the mating plate 32 is a flanged structure, its thickness is relatively thin. In order to reduce the overall weight of the junction box, the door 2 is also relatively thin. On this basis, a nut 5 is provided on the side of the mating plate 32 away from the door 2 or on the side closer to the box body 1. The nut 5 can be fixed to the mating plate 32 by welding, and the nut 5 corresponds to the position of the first connecting hole 321. Thus, the first connecting hole 321 and the second connecting hole 21 can both be through holes, and the inner wall can be unthreaded. After the bolt is inserted, the bolt can be threadedly connected to the nut 5 to achieve fixation.

[0049] The second connecting hole 21 on the door 2 can be a countersunk hole, so that after the bolt is inserted, the bolt head can be placed in the countersunk hole to prevent the bolt head from protruding from the door 2. In order to facilitate the installation or removal of the door 2, a handle 6 can also be provided on the outside of the door 2 so that the operator can hold the door 2 by holding the handle 6.

[0050] Optionally, the junction box is a transformer junction box, that is, the inside of the junction box is used to house the transformer and related accessories and wiring, such as an oil-immersed transformer or a dry-type transformer.

[0051] Of course, in other embodiments, a photovoltaic inverter, communication base station equipment, or outdoor lighting control equipment may also be arranged inside the junction box.

[0052] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A junction box, characterized in that, The box includes a door (2) and a box body (1) with a door on one side. The door (2) is used to close or open the door of the box body (1). The box body (1) is provided with a first water-blocking ring structure (3) surrounding the door on the side facing the door (2). The door (2) is provided with a second water-blocking ring structure (4) on the side facing the box body (1). When the door (2) closes the door of the box body (1), the second water-blocking ring structure (4) surrounds the first water-blocking ring, and the door (2) abuts against the first water-blocking ring structure (3) in the thickness direction of the door (2).

2. The junction box according to claim 1, characterized in that, It also includes a sealing structure, which is disposed between the box door (2) and the first water-blocking ring structure (3), and the box door (2) indirectly abuts against the first water-blocking ring structure (3) through the sealing structure.

3. The junction box according to claim 2, characterized in that, The sealing structure is a sealing ring or a sealing gasket, and / or the material of the sealing structure is EPDM rubber.

4. The junction box according to claim 1, characterized in that, The first water-blocking ring structure (3) and the box body (1) are integrally formed, and / or the second water-blocking ring structure (4) and the box door (2) are integrally formed.

5. The junction box according to claim 1, characterized in that, It also includes bolts. The box body (1) or the first water-blocking ring structure (3) is provided with a first connecting hole (321), and the box door (2) or the second water-blocking ring structure (4) is provided with a second connecting hole (21). When the box door (2) closes the door of the box body (1), the first connecting hole (321) and the second connecting hole (21) are in the same position. The bolts are used to be inserted into the second connecting hole (21) and the first connecting hole (321).

6. The junction box according to claim 5, characterized in that, Multiple first connecting holes (321) are provided, and multiple first connecting holes (321) are distributed around the doorway. Multiple second connecting holes (21) are provided, and multiple second connecting holes (21) are arranged in a one-to-one correspondence with multiple first connecting holes (321). Multiple bolts are provided, and multiple bolts are used to be inserted into the corresponding second connecting holes (21) and first connecting holes (321) respectively.

7. The junction box according to claim 5, characterized in that, The first water-blocking ring structure (3) includes a rectangular baffle (31), which surrounds the edge of the doorway. When the box door (2) closes the doorway of the box body (1), the thickness direction of the rectangular baffle (31) is perpendicular to the thickness direction of the box door (2). The first water-blocking ring structure (3) also includes a connecting plate (32) located at one end of the rectangular baffle (31) facing the box door (2). The connecting plate (32) is a flange structure that is provided outward from the rectangular baffle (31). When the box door (2) closes the doorway of the box body (1), the box door (2) abuts against the connecting plate (32).

8. The junction box according to claim 7, characterized in that, The first connecting hole (321) is provided on the docking plate (32), and the second connecting hole (21) is provided on the box door (2).

9. The junction box according to claim 8, characterized in that, It also includes a nut (5), which is located on the side of the docking plate (32) away from the box door (2), and the nut (5) corresponds to the position of the first connecting hole (321).

10. The junction box according to any one of claims 1-9, characterized in that, The junction box is a transformer junction box.

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