Terminal plug, wiring terminal and photovoltaic inverter

Abstract

The utility model discloses a terminal plug, a wiring terminal and a photovoltaic inverter. The terminal plug is used for plugging a first terminal stud of the terminal, the first terminal stud comprises a wiring part and a locking part, the terminal plug comprises a main body, the main body is provided with a plugging through hole and a locking part, the plugging through hole is used for plugging the wiring part, and the locking part is used for being fixedly connected with the locking part; and the sealing plug is detachably mounted in the insertion through hole. According to the utility model, the problem that a plug used for plugging the second terminal stud is easy to fall off in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, and in particular to a terminal plug, a wiring terminal and a photovoltaic inverter. Background Art

[0002] Photovoltaic inverter (PV inverter or solar inverter) is an inverter that can convert the variable DC voltage generated by photovoltaic (PV) solar panels into AC power at the mains frequency, which can be fed back to the commercial power transmission system or used for off-grid power grids. Photovoltaic inverter is one of the important system balance (BOS) in photovoltaic array systems and can be used with general AC-powered equipment.

[0003] The housing of the photovoltaic inverter is equipped with many terminals for connecting wires. The terminals include a male plug and a female plug. When leaving the factory, the female plug is usually assembled and fixed on the housing of the photovoltaic inverter, while the male plug is usually separated from the female plug when leaving the factory. In actual use, the user can connect the male plug that matches a part or all of the female plugs to the female plug according to the use requirements.

[0004] However, photovoltaic inverters are usually equipped with many female plugs. When the female plug is not connected to the male plug, a plug is usually used to seal the female plug to prevent dust and reduce safety hazards. The existing plug is a columnar structure, which is usually fixed to the female plug by interference fit. In this structure, the plug is easy to fall off due to aging or external force, which is difficult to meet the use requirements of photovoltaic inverters. Utility Model Content

[0005] The main purpose of the utility model is to provide a terminal plug, a wiring terminal and a photovoltaic inverter, so as to solve the problem that the plug used for sealing the second wiring terminal in the prior art is easy to fall off.

[0006] According to one aspect of the utility model, a terminal plug is provided, the terminal plug is used to seal a first connection terminal of a connection terminal, the first connection terminal includes a connection portion and a locking portion, and the terminal plug includes:

[0007] A main body, wherein the main body is provided with an inserting through hole and a locking portion, wherein the inserting through hole is used for inserting with the wiring portion, and the locking portion is used for fixed connection with the locking portion;

[0008] A sealing plug is detachably mounted in the plug-in through hole.

[0009] Furthermore, the sealing plug includes a sealing column and an outer flange, the sealing column is detachably inserted in the plug-in through hole, the outer flange protrudes from the outer edge of the sealing column, and the maximum outer diameter of the outer flange is not less than the aperture of the plug-in through hole.

[0010] Furthermore, the blocking column comprises an elastic column, and the elastic column is connected to the plug-in through hole by interference fit.

[0011] Further, one of the locking portion and the locking portion is a buckle, and the other is a hook matched with the buckle.

[0012] Further, the buckle comprises an insertion hole section and a locking step, the insertion hole section extends from the first end of the main body in a direction parallel to the axis of the insertion through hole, and the locking step is arranged at an end of the insertion hole section away from the first end; and / or,

[0013] The hook comprises an inserting rod and a hook block, and the hook block is arranged at the end of the inserting rod.

[0014] Further, the buckle is provided on the main body, and a first through hole is provided on the main body. The first through hole is staggered with the plug-in through hole and extends in a direction perpendicular to the axis of the plug-in through hole, and the first through hole is connected to an end of the plug-in hole section away from the first end so that the inner wall surface of the first through hole forms the locking step.

[0015] Furthermore, there are two hooks, and the two hooks are respectively arranged on two opposite sides of the sealing plug;

[0016] There are two buckles, which are respectively arranged on two opposite sides of the plug-in through hole to be used for respectively cooperating with the two hooks.

[0017] Furthermore, the main body is a second wiring terminal that matches the first wiring terminal, the second wiring terminal is provided with the plug-in through hole, and a conductive structure for connecting to a wire is provided in the plug-in through hole.

[0018] On the other hand, the present application also provides a wiring terminal, which includes the above-mentioned terminal plug.

[0019] On the other hand, the present application also provides a photovoltaic inverter, which includes the above-mentioned connection terminal.

[0020] In the present invention, when the terminal plug in the present invention is used to seal the first wiring terminal, the main body is installed on the first wiring terminal, and the wiring part of the first wiring terminal is inserted into the plug-in through hole, and the locking part and the locking part on the terminal plug are fixedly connected together. After the terminal plug in the present invention is installed, the sealing plug can cover the end of the plug-in through hole, which can play a good role in dust prevention and reducing safety hazards. The locking part and the locking part are fixedly connected, and even if the terminal plug is aged or hit, it is not easy to fall off from the first wiring terminal. Compared with the plug in the prior art that is fixedly connected to the first wiring terminal by an interference fit, the main body of the terminal plug in the present invention is fixedly connected to the first wiring terminal through the locking part and the locking part, which can not only well seal the wiring part of the first wiring terminal, but also not easily fall off, and is safer and more reliable when used, which can reduce the safety hazards during the use of the wiring terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A three-dimensional structural diagram of a terminal plug disclosed in an embodiment of the present application when installed on a first wiring terminal;

[0023] Figure 2 for Figure 1 Exploded diagram of

[0024] Figure 3 for Figure 1 A three-dimensional structural diagram of the sealing plug;

[0025] Figure 4 for Figure 1 A cross-sectional view of

[0026] Figure 5 A three-dimensional structural diagram of another terminal plug disclosed in an embodiment of the present application when installed on a first wiring terminal;

[0027] Figure 6 for Figure 5 Exploded diagram of

[0028] Figure 7 for Figure 6 sectional view of .

[0029] The above drawings include the following reference numerals:

[0030] 10. Main body; 11. Plug-in through hole; 12. Locking portion; 121. Plug-in hole section; 122. Stopping step; 13. First through hole; 14. First end; 20. Sealing plug; 21. Sealing column; 22. External flange; 100. First wiring terminal; 101. Wiring portion; 102. Locking portion; 1021. Plug-in rod; 1022. Hook block; 10221. Guide slope. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] As mentioned in the background technology, the plug used to seal the female plug in the prior art is prone to fall off. To this end, the utility model provides a new terminal plug, which can seal the female plug and is not easy to fall off. The terminal plug of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, a terminal plug is provided, which is used to seal a first terminal end 100 of a terminal block, and the first terminal end 100 can be a male plug (such as Figures 1 to 2 ,as well as Figure 4As shown), it can also be a female plug (as shown Figures 5 to 7 The first wiring terminal 100 includes a wiring portion 101 and a locking portion 102. The wiring portion 101 is used to connect the wire, and the locking portion 102 is used to snap-fit ​​with the second wiring terminal to achieve the connection between the first wiring terminal 100 and the second wiring terminal.

[0036] In this embodiment, the terminal plug includes a main body 10 and a sealing plug 20. The main body 10 is provided with a plug-in through hole 11 and a locking portion 12, the plug-in through hole 11 is used to be plugged with the wiring portion, and the locking portion 12 is used to be fixedly connected with the locking portion 102; the sealing plug 20 is provided separately from the main body 10, and the sealing plug 20 is detachably installed in the plug-in through hole 11.

[0037] When the terminal plug in this embodiment is used to seal the first wiring terminal 100, the main body 10 is installed on the first wiring terminal 100, and the wiring portion 101 of the first wiring terminal 100 is inserted into the plug-in through hole 11, and the locking portion 12 on the terminal plug is fixedly connected with the locking portion 102. After the terminal plug in this embodiment is installed, the sealing plug 20 can cover the end of the plug-in through hole 11, which can play a good role in dust prevention and reducing safety hazards. The locking portion 12 is fixedly connected with the locking portion 102, and even if the terminal plug is aged or hit, it is not easy to fall off from the first wiring terminal 100.

[0038] Compared with the plug in the prior art which is fixedly connected to the female plug by interference fit, the main body 10 of the terminal plug in this embodiment is fixedly connected to the first wiring terminal 100 by a locking portion 12 and a locking portion 102. It can not only seal the wiring portion 101 of the first wiring terminal 100 well, but also is not prone to falling off. It is safer and more reliable in use, and can reduce safety hazards during the use of the wiring terminal.

[0039] At the same time, since the sealing plug 20 in this embodiment is detachably connected to the main body 10, it is easy to disassemble and assemble. After the sealing plug 20 is removed, the terminal plug in this embodiment can be used as a second wiring terminal for matching with the first wiring terminal 100. The plug-in through hole 11 is provided with a conductive structure for connecting with a wire. In actual use, it is only necessary to insert an external wire into the plug-in through hole 11 and connect it to the conductive structure, and then conduct with the wiring portion 101 on the first wiring terminal 100.

[0040] That is to say, the main body 10 in this embodiment can be a second wiring terminal that cooperates with the first wiring terminal 100. The second wiring terminal is provided with the above-mentioned plug-in hole 11, and the plug-in hole 11 is at least used to connect the wire. In actual use, it is only necessary to remove the sealing plug 20, and then insert the external wire into the plug-in hole 11, and make the wire conductive with the wiring part 101 on the first wiring terminal 100.

[0041] Furthermore, the main body 10 in this embodiment is a columnar structure, and the axis of the columnar structure is provided with the above-mentioned plug-in through hole 11. After the terminal plug is installed on the first wiring terminal 100, the plug-in through hole 11 can cooperate with the wiring portion 101 and be blocked by the sealing plug 20, which can play a good role in dust prevention and reducing safety hazards. The columnar structure in this embodiment can be cylindrical, elliptical, prismatic, other special-shaped columns or other special-shaped bodies, etc. The drawings of the utility model show the situation when the main body 10 is set as a special-shaped column (i.e., a column with an irregular cross-section).

[0042] In the present invention, one of the locking portion 102 and the locking portion 12 is a buckle, and the other is a hook that matches the buckle. That is, when the locking portion 102 is set as a buckle, the locking portion 12 is set as a hook (such as Figure 6 When the locking portion 102 is set as a hook, the locking portion 12 is set as a buckle (see Figure 2 At the same time, in this embodiment, the locking portion 12 used to cooperate with the terminal plug is the structure of the first wiring terminal 100 originally used to cooperate with the second wiring terminal. That is to say, the terminal plug in this embodiment combines the structural characteristics of the first wiring terminal 100 itself, and designs a terminal plug that can be stably connected to the first wiring terminal 100, which has a simple structure and is stable and reliable.

[0043] See also Figures 1 to 7 As shown, the buckle in the present application includes a plug-in hole section 121 and a locking step 122. The plug-in hole section 121 extends from the first end 14 of the main body 10 in a direction parallel to the axis of the plug-in through hole 11, and the locking step 122 is arranged at the end of the plug-in hole section 121 away from the first end 14. With such a configuration, when assembling the terminal plug, it is only necessary to make the hook face the buckle, and then press the sealing plug 20 so that the hook slides along the plug-in hole section 121 and cooperates with the locking step 122. The structure is simple and easy to install.

[0044] In order to match the buckle, the hook in this embodiment includes a plug rod 1021 and a hook block 1022, and the hook block 1022 is arranged at the end of the plug rod 1021. The hook block 1022 protrudes from the outer edge of the plug rod 1021. In order to allow the hook block 1022 to pass through, the cross section of the plug hole section 121 in this embodiment is not less than the maximum cross section of the hook block 1022. The end of the hook block 1022 can be provided with a guide slope 10221 to facilitate insertion into the plug hole section 121. During the process of inserting the hook into the plug hole section 121, the hook block 1022 is deformed toward the inner side by the push force applied by the inner wall of the plug hole section 121, and slides along the depth direction of the plug hole section 121. When the hook block 1022 slides out of the other end of the plug hole section 121, the resistance force applied by the plug hole section 121 to the hook block 1022 is 0. At this time, the hook block 1022 is reset and hooked on the locking step 122 under the drive of the plug rod 1021, thereby completing the locking of the sealing plug 20. The structure is simple and the operation is convenient.

[0045] like Figures 1 to 4 As shown, in a specific embodiment of the present application, the buckle is arranged on the main body 10, and the main body 10 is provided with a first through hole 13, which is staggered with the plug-in through hole 11 and extends in a direction perpendicular to the axis of the plug-in through hole 11, and the first through hole 13 is connected with the end of the plug-in hole section 121 away from the first end 14 so that a locking step 122 is formed on the inner wall surface of the first through hole 13. In other words, the first through hole 13 in this embodiment is not connected with the plug-in through hole 11. Specifically, the first through hole 13 is located outside the plug-in through hole 11, so that dust and the like can be prevented from entering the plug-in through hole 11 from the first through hole 13. At the same time, through the effect of the first through hole 13, it is convenient to form a locking step 122 at the end of the plug-in hole section 121 away from the first end 14, so as to cooperate with the hook to achieve a good limiting effect.

[0046] After the terminal plug is assembled, the plug rod 1021 is located in the plug hole section 121, and the hook block 1022 is located in the first through hole 13. The overall shape of the terminal plug that is matched together does not have too many ridges, and is not easily hooked by external structures. The structure is more stable and reliable, and can further reduce the safety hazards of the terminal block. Of course, in other embodiments of the utility model, in order to be able to process a locking step 122 that matches the hook on the main body 10, a groove can also be processed on the main body 10 (the depth direction of the groove extends in the radial direction of the plug through hole 11), and the side wall of the groove is connected to the plug hole section 121, and then the above-mentioned locking step 122 is formed on the side wall of the plug hole section 121. As long as it is other deformation methods under the conception of the utility model, they are all within the protection scope of the utility model.

[0047] Compared with the method of machining a groove on the main body 10 to form the locking step 122, the method of machining the first through hole 13 and forming the above-mentioned locking step 122 on the inner wall of the first through hole 13 is less likely to destroy the structural strength of the entire main body 10, and can improve the service life of the terminal plug in this embodiment to a certain extent.

[0048] Optionally, the hook and buckle in the present application can be one, two or more. In a specific embodiment of the present application, the hook and buckle are both provided in two, the two hooks are respectively provided on opposite sides of the sealing plug 20, and the two buckles are respectively provided on opposite sides of the plug-in through hole 11 to be respectively matched and connected with the two hooks, which has a simple structure and is easy to install and use.

[0049] See also Figures 5 to 7 As shown, in other embodiments of the present application, the buckle can also be set on the first wiring terminal 100, and the hook can be correspondingly set on the main body 10.

[0050] See also Figure 3 As shown, in the present application, the sealing plug 20 includes a sealing column 21 and an outer flange 22. The sealing column 21 is detachably inserted into the plug-in through hole 11. The outer flange 22 protrudes from the outer edge of the sealing column 21. The maximum outer diameter of the outer flange 22 is not less than the aperture of the plug-in through hole 11. During actual installation, the plug-in through hole 11 can be blocked by the sealing column 21 to prevent external dust from entering the plug-in through hole 11. The outer flange 22 can stop the sealing column 21 outside the main body 10, thereby facilitating the disassembly and assembly of the sealing plug 20.

[0051] Optionally, the blocking column 21 in this embodiment includes an elastic column, which may be an elastic rubber column or an elastic silicone column. In this embodiment, by setting the blocking column 21 as an elastic column, the plug-in through hole 11 can be well sealed. During installation, the elastic column and the plug-in through hole 11 are interference fit, the structure is simple, and it is easy to disassemble and assemble.

[0052] On the other hand, the utility model further provides a wiring terminal, which includes the terminal plug in the above embodiment. Therefore, the wiring terminal includes all the technical effects of the terminal plug in the above embodiment. Since the technical effects of the terminal plug have been described in detail above, they will not be repeated here.

[0053] In a third aspect, the utility model further provides a photovoltaic inverter, which includes the wiring terminal in the above embodiment. Therefore, all technical effects of the photovoltaic inverter including the wiring terminal in the above embodiment are not repeated here.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, 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 terminal plug, the terminal plug is used to seal a first connection terminal (100) of a connection terminal, the first connection terminal (100) comprising a connection portion (101) and a locking portion (102), characterized in that: The terminal plug comprises: A main body (10), the main body (10) being provided with an inserting through hole (11) and a locking portion (12), the inserting through hole (11) being used for inserting with the wiring portion (101), and the locking portion (12) being used for fixed connection with the locking portion (102); A sealing plug (20) is detachably mounted in the plug-in through hole (11).

2. The terminal plug according to claim 1, characterized in that: The sealing plug (20) comprises a sealing column (21) and an outer flange (22); the sealing column (21) is detachably inserted into the plug-in through hole (11); the outer flange (22) protrudes from the outer edge of the sealing column (21); and the maximum outer diameter of the outer flange (22) is not less than the hole diameter of the plug-in through hole (11).

3. The terminal plug according to claim 2, characterized in that: The blocking column (21) comprises an elastic column, and the elastic column is connected to the plug-in through hole (11) by interference fit.

4. The terminal plug according to claim 1, characterized in that: One of the locking portion (102) and the locking portion (12) is a buckle, and the other is a hook matched with the buckle.

5. The terminal plug according to claim 4, characterized in that: The buckle comprises an inserting hole section (121) and a locking step (122), wherein the inserting hole section (121) extends from the first end (14) of the main body (10) in a direction parallel to the axis of the inserting through hole (11), and the locking step (122) is arranged at an end of the inserting hole section (121) away from the first end (14); and / or, The hook comprises a plug-in rod (1021) and a hook block (1022), and the hook block (1022) is arranged at the end of the plug-in rod (1021).

6. The terminal plug according to claim 5, characterized in that: The buckle is arranged on the main body (10), and the main body (10) is provided with a first through hole (13), the first through hole (13) is staggered with the plug-in through hole (11) and extends in a direction perpendicular to the axis of the plug-in through hole (11), and the first through hole (13) is connected to an end of the plug-in hole section (121) away from the first end (14) so ​​that the inner wall surface of the first through hole (13) forms the locking step (122).

7. The terminal plug according to claim 4, characterized in that: There are two hooks, which are respectively arranged on two opposite sides of the sealing plug (20); There are two buckles, which are respectively arranged on two opposite sides of the plug-in through hole (11) to be respectively matched and connected with the two hooks.

8. The terminal plug according to any one of claims 1 to 7, characterized in that: The main body (10) is a second wiring terminal that matches the first wiring terminal. The second wiring terminal is provided with the plug-in through hole (11). The plug-in through hole (11) is provided with a conductive structure for connecting to a wire.

9. A terminal block, characterized in that: The connection terminal comprises the terminal plug according to any one of claims 1 to 8.

10. A photovoltaic inverter, characterized in that: The photovoltaic inverter comprises the connection terminal according to claim 9.

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