Photovoltaic wire connecting assembly

Abstract

The utility model relates to the technical field of electrical connection, and discloses a photovoltaic wire connection assembly. The photovoltaic wire connecting assembly comprises a wiring pipe and an outer sleeve. The wiring pipe is used for crimping with a wire to connect the wire. The outer sleeve comprises a sleeve body and two sealing pipe caps, the sleeve body is of an integrally formed structure, a sleeve channel is formed in the sleeve body, the sleeve channel is used for containing a wiring pipe which is in compression joint with a wire, and the length of the sleeve channel is larger than that of the wiring pipe; sealing locking structures are arranged at the two ends of the sleeve body, the two sealing pipe caps are detachably connected with the two ends of the sleeve body respectively, and radial acting force is applied to the sealing locking structures after the two sealing pipe caps are connected to the sleeve body, so that the sealing locking structures are in sealing connection with the outer surface of a wire insulation skin. The photovoltaic wire connecting assembly can improve the condition of poor sealing and waterproof effects at the joints of the photovoltaic wires.

Description

Technical Field

[0001] This application relates to the technical field of electrical connection, and in particular to a photovoltaic wire connection component. Background Art

[0002] With the development of society and the improvement of living standards, solar energy, as a clean energy source, has been widely used. The photovoltaic wire connection structure is mostly in an outdoor environment, and it is necessary to do a good job in protection to avoid sand, stone, rain and snow from damaging the stability and electrical conductivity of the photovoltaic wire connection structure. In the existing photovoltaic field, the sealing performance of the protection structure at the wire connection is poor and cannot achieve a reliable waterproof effect. Summary of the Invention

[0003] The purpose of this application is to make up for the deficiencies of the existing technology and provide a photovoltaic wire connection component for improving the poor sealing and waterproof effect at the connection of photovoltaic wires.

[0004] To solve the above technical problems, this application adopts the following technical solutions:

[0005] This application provides a photovoltaic wire connection component, which includes a wiring pipe and an outer sleeve. The wiring pipe is used for crimping with the wire to connect the wire. The outer sleeve includes a sleeve body and two sealing caps. The sleeve body is an integrally formed structure. A sleeve channel is provided on the sleeve body, and the sleeve channel is used for accommodating the wiring pipe after being crimped with the wire. The length of the sleeve channel is greater than the length of the wiring pipe; Sealing and locking structures are provided at both ends of the sleeve body. The two sealing caps are respectively detachably connected to both ends of the sleeve body, and apply a radial force to the sealing and locking structures after being connected to the sleeve body, so that the sealing and locking structures are hermetically connected to the outer surface of the wire insulation skin.

[0006] Optionally, the axial length of the sleeve body is L1, and the axial length of the wiring pipe is L2, 1.5≤L1 / L2≤5.

[0007] Optionally, at least one annular protrusion is provided on the inner surface of the sleeve body. The inner diameter of the annular protrusion is smaller than the outer diameter of the wire insulation skin and greater than or equal to the diameter of the wire metal core. The distance between the annular protrusion and the end of the sleeve body satisfies that when the annular protrusion fits the cross-section of the wire insulation skin, the sealing and locking structures at both ends of the sleeve body are both located outside the wire insulation skin.

[0008] Optionally, the number of the annular protrusions is two, and the two annular protrusions are symmetrically arranged with respect to the central cross-section of the sleeve body, and the distance between the two annular protrusions is greater than or equal to the axial length of the wiring pipe.

[0009] Optionally, the sealing and locking structure includes a sealing sleeve and a plurality of locking claws. One end of each locking claw is fixedly connected to the sleeve body, and the other end extends away from the sleeve body. The plurality of locking claws are arranged in a circumferential array around the outer surface of the sealing sleeve. The axial length of the sealing sleeve is greater than the axial extension length of the locking claws. An installation cavity for installing the sealing and locking structure is formed on the sealing pipe cap, and the radial dimension of the installation cavity is smaller than the radial dimension of the sealing and locking structure in its natural state.

[0010] Optionally, an external thread is provided on the outer surface of the sleeve body, and an internal thread matching the external thread is provided on the sealing pipe cap.

[0011] Optionally, the wiring pipe includes a copper pipe section and an aluminum pipe section welded together. The copper pipe section is used for crimping with a copper wire, and the aluminum pipe section is used for crimping with an aluminum wire.

[0012] Optionally, the copper pipe section includes an integrally formed copper straight pipe section and a copper transition pipe section. The copper transition pipe section includes a large end and a small end, and the outer diameter of the copper transition pipe section gradually increases from the small end to the large end; the outer diameter of the small end of the copper transition pipe section is the same as the outer diameter of the copper straight pipe section, and the small end of the copper transition pipe section is connected to the copper straight pipe section. The outer diameter of the large end of the copper transition pipe section is the same as the outer diameter of the aluminum pipe section, and the large end of the copper transition pipe section is welded to the aluminum pipe section.

[0013] Optionally, a crimping portion formed by hexagonal crimping followed by spot crimping is formed on the wiring pipe.

[0014] Optionally, a plurality of sawtooth racks are formed on the inner surface of the wiring pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the advantages of the present application easier to understand, the present application briefly described above will be described in more detail by referring to the specific embodiments shown in the drawings. It can be understood that these drawings only depict typical embodiments of the present application, and thus should not be considered as limiting its protection scope. The present application will be described and explained with additional features and details through the drawings.

[0016] Figure 1 FIG. is a schematic structural diagram of a wiring pipe crimped with a wire provided by the present application;

[0017] Figure 2 FIG. is a schematic structural diagram of a wiring pipe crimped with a wire from another perspective provided by the present application;

[0018] Figure 3 FIG. is a schematic structural diagram of a sleeve body sleeved outside a wiring pipe and a wire provided by the present application;

[0019] Figure 4Structural schematic diagram of a casing body provided by this application;

[0020] Figure 5 Structural schematic diagram of a sealing and locking structure at the end of a casing body provided by this application;

[0021] Figure 6 Structural schematic diagram of a part after crimping of a sealing connection pipe of an outer casing and a wire provided by this application.

[0022] The reference signs are as follows:

[0023] 100, connection pipe; 200, outer casing; 210, casing body; 220, sealing cap; 230, casing channel; 240, sealing and locking structure; 250, annular protrusion; 241, sealing sleeve; 242, locking claw; 211, external thread; 110, copper pipe section; 120, aluminum pipe section; 111, copper straight pipe section; 112, copper transition pipe section; 130, crimping part; 300, wire; 310, wire metal core; 320, wire insulating skin. Detailed implementation manners

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of this application. However, it is obvious to those skilled in the art that the embodiments of this application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of this application, some well-known technical features in the art are not described.

[0025] In order to thoroughly understand the embodiments of this application, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of this application are described in detail below. However, in addition to these detailed descriptions, this application can also have other embodiments.

[0026] In the description of the present application, the term "A and / or B" represents all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and / or B", and can include only A, only B, or A and B; the singular terms "a" and "the" can also include the plural form; the orientation or positional relationship indicated by terms such as "inner side", "outer side", "longitudinal direction", "lateral direction", "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application rather than requiring the present application to be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present application; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise clearly specified and limited, the terms "install", "connect", "couple" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] The following further elaborates on the embodiments of the present application with reference to the drawings:

[0028] Please refer to Figures 1-6 , the present application provides a photovoltaic wire 300 connection assembly, which includes a wiring pipe 100 and an outer sleeve 200. The wiring pipe 100 is used for crimping with the wire 300 to connect the wire 300. The outer sleeve 200 includes a sleeve body 210 and a sealing tube cap 220. The sleeve body 210 is an integrally formed structure. A sleeve channel 230 is provided on the sleeve body 210. The sleeve channel 230 is used to accommodate the wiring pipe 100 after being crimped with the wire 300. The length of the sleeve channel 230 is greater than the length of the wiring pipe 100. Sealing and locking structures 240 are provided at both ends of the sleeve body 210. The two sealing tube caps 220 are respectively detachably linked to both ends of the sleeve body 210, and apply a radial force to the sealing and locking structures 240 after being linked to the sleeve body 210, so that the sealing and locking structures 240 are hermetically connected to the outer surface of the insulating sheet of the wire 300.

[0029] In the above implementation process, the photovoltaic wire 300 is connected in a crimping form to ensure the stability of the connection structure and electrical connection. Before the terminal tube 100 and the two wires 300 are both crimped, the sleeve body 210 and the sealing tube cap 220 are sleeved on one wire 300, and then the crimping of the terminal tube 100 and the two wires 300 or the remaining one wire 300 is completed. After the crimping is completed, the sleeve body 210 is moved to the position of the terminal tube 100 so that the sleeve body 210 completely covers the terminal tube 100, and then the two sealing tube caps 220 are respectively connected to both ends of the sleeve body 210, and the sealing and locking structure 240 is radially extruded to achieve the sealing of both ends of the sleeve body 210, so as to achieve a good sealing and protection effect.

[0030] In a possible implementation manner, please refer to Figure 2 and Figure 4 , the axial length of the sleeve body 210 is L1, the axial length of the terminal tube 100 is L2, and 1.5 ≤ L1 / L2 ≤ 5.

[0031] In the above implementation process, the length of the sleeve body 210 is set to be 1.5 - 5 times the length of the terminal tube 100. On the one hand, it can prevent part of the sealing and locking structure 240 on the sleeve body 210 from being sleeved outside the terminal tube 100 instead of outside the insulating sheet of the wire 300, that is, it is convenient for the staff to place the terminal tube 100 in the middle of the outer sleeve 200. In addition, the longer length of the sleeve body 200 can also leave a certain distance between the end of the sleeve and the end of the terminal tube 100, which can improve the sealing and waterproof effect.

[0032] Optionally, the axial length of the sleeve body 210 is 120 mm, and the axial length of the terminal tube 100 is 42 mm.

[0033] To ensure the sealing performance of the sleeve body 210, the sleeve body 210 is generally made of an opaque rubber material. In this way, after the terminal tube 100 is crimped, when the sleeve body 210 is covered outside the terminal tube 100, it is impossible to accurately judge the position of the terminal tube 100 inside the sleeve body 210. Judging only by intuition is likely to cause part of the sealing and locking structure 240 to be located outside the terminal tube 100, and the sealing effect will be greatly reduced.

[0034] In a possible implementation manner, at least one annular protrusion 250 is provided on the inner surface of the sleeve body 210. The inner diameter of the annular protrusion 250 is smaller than the outer diameter of the wire insulation 320 and greater than or equal to the diameter of the wire metal core 310. The distance between the annular protrusion 250 and the end of the sleeve body 210 satisfies that when the annular protrusion 250 fits the cross-section of the wire insulation 320, the sealing and locking structures 240 at both ends of the sleeve body 210 are both located outside the wire insulation 320.

[0035] It should be understood that the inner diameter of the above-mentioned annular protrusion 250 being smaller than the outer diameter of the wire insulation 320 and larger than the diameter of the wire metal core 310 means that when the outer diameters of the two wire insulations 320 connected by the wiring pipe 100 are different, the inner diameter of the annular protrusion 250 is smaller than the outer diameter of the wire insulation 320 with the smaller outer diameter; when the sizes of the wire metal cores 310 of the two wires 300 connected by the wiring pipe 100 are different, the inner diameter of the annular protrusion 250 is larger than the wire metal core 310 with the larger diameter.

[0036] The cross-section of the above-mentioned wire insulation 320 refers to that the wiring pipe 100 is crimped with the metal core of the wire 300, so as to achieve electrical conduction between the two wires 300 and the wiring pipe 100. Therefore, before the two wires 300 are crimped, the insulation at the end crimping area needs to be stripped off to expose the wire metal core 310 inside, and thus a cross-section of the wire insulation 320 will be formed at the stripping place.

[0037] Generally, in order to ensure that the exposed wire metal core 310 is sufficient for the wiring pipe 100 to crimp, generally when stripping the wire 300, a slightly longer section of insulation will be stripped off. Therefore, after the wiring pipe 100 and the two wire metal cores 310 are crimped, there will be a gap between the wiring pipe 100 and the cross-section of the wire insulation 320. Therefore, in the present application, an annular protrusion 250 is provided on the inner surface of the sleeve body 210, and the inner diameter of the annular protrusion 250 is smaller than the outer diameter of the wire insulation 320 and larger than or equal to the diameter of the wire metal core 310. Based on the certain elastic deformation of the wire insulation 320 and the annular protrusion 250 itself, the operator can move the sleeve body 210 left and right. When the operator feels an obvious jamming feeling and blocking feeling in the hand, it means that the annular protrusion 250 is clamped between the cross-section of the wire insulation 320 and the wiring pipe 100. At this time, it means that the sealing and locking structures 240 at both ends of the sleeve body 210 are both located outside the wire insulation 320, ensuring the sealing effect of the outer sleeve 200 on the wire 300.

[0038] In a possible implementation manner, the number of the annular protrusions 250 is two, and the two annular protrusions 250 are symmetrically arranged with respect to the central cross-section of the sleeve body 210, and the distance between the two annular protrusions 250 is greater than or equal to the axial length of the wiring pipe 100.

[0039] It should be understood that the central cross-section of the above-mentioned sleeve body 210 refers to the radial cross-section passing through the axial center of the sleeve body 210.

[0040] In the above implementation process, the two annular protrusions 250 are symmetrically arranged, which can help the operator more quickly and accurately limit the wiring pipe 100 near the middle of the outer sleeve 200, ensuring a good sealing effect.

[0041] In a possible implementation, the sealing and locking structure 240 includes a sealing sleeve 241 and a plurality of locking claws 242. One end of each locking claw 242 is fixedly connected to the sleeve body 210, and the other end extends away from the sleeve body 210. The plurality of locking claws 242 are arranged in a circumferential array around the outer surface of the sealing sleeve 241. The axial length of the sealing sleeve 241 is greater than the axial extension length of the locking claws 242. An installation cavity for installing the sealing and locking structure 240 is formed on the sealing pipe cap 220, and the radial dimension of the installation cavity is smaller than the radial dimension of the sealing and locking structure 240 in its natural state.

[0042] It should be understood that the radial dimension of the sealing and locking structure 240 in its natural state refers to the radial dimension of the sealing and locking structure 240 when the sealing sleeve 241 is sleeved on the outer surface of the wire insulation 320 and the plurality of locking claws 242 cover the outer surface of the sealing sleeve 241.

[0043] In the above implementation process, since the radial dimension of the installation cavity on the sealing pipe cap 220 is smaller than the radial dimension of the sealing and locking structure 240 in its natural state, when the sealing sleeve 241 is connected to the sleeve body 210, the installation cavity of the sealing sleeve 241 generates a radially squeezing force on the locking claws 242, and the locking claws 242 squeeze the sealing sleeve 241 inward from the outer periphery of the sealing sleeve 241, so that the sealing sleeve 241 is closely attached to the wire insulation 320, achieving a sealing and waterproof effect.

[0044] Optionally, an external thread 211 is provided on the outer surface of the sleeve body 210, and an internal thread matching the external thread 211 is provided on the sealing pipe cap 220. That is, the sealing nut is threadedly connected to the sleeve body 210, and the connection method is convenient to operate and the connection structure is stable.

[0045] Optionally, the wiring pipe 100 includes a copper pipe section 110 and an aluminum pipe section 120 welded together. The copper pipe section 110 is used for crimping with the copper wire 300, and the aluminum pipe section 120 is used for crimping with the aluminum wire 300. Therefore, this photovoltaic wire 300 connection component can be used in the copper-aluminum transition structure in the photovoltaic field.

[0046] Since the electrical conductivity of copper is better than that of aluminum, based on the same electrical conductivity requirements, the diameter of the copper wire 300 is smaller than that of the aluminum wire 300. Similarly, the diameter of the copper pipe section 110 on the wiring pipe 100 is smaller than that of the aluminum pipe section 120. However, the copper-aluminum welding involves copper-aluminum transition. In the prior art, the transition is mostly from aluminum to copper, that is, an aluminum transition section with a gradually decreasing diameter is formed on the aluminum pipe section 120, which is reduced to the same diameter as the copper pipe section 110. However, the electrical conductivity of aluminum is poor. Compared with the aluminum straight pipe section, the electrical conductivity of the aluminum transition section decreases due to the reduction of the cross-sectional area, that is, the electrical conductivity at this place also decreases accordingly, resulting in an electrical conduction obstacle at the copper-aluminum transition.

[0047] In a possible implementation, the copper pipe section 110 includes an integrally formed copper straight pipe section 111 and a copper transition pipe section 112. The copper transition pipe section 112 includes a large end and a small end. The outer diameter of the copper transition pipe section 112 gradually increases from the small end to the large end. The outer diameter of the small end of the copper transition pipe section 112 is the same as the outer diameter of the copper straight pipe section 111, and the small end of the copper transition pipe section 112 is connected to the copper straight pipe section 111. The outer diameter of the large end of the copper transition pipe section 112 is the same as the outer diameter of the aluminum pipe section 120, and the large end of the copper transition pipe section 112 is welded to the aluminum pipe section 120.

[0048] In the above implementation process, the present application adopts a scheme of transitioning from copper to aluminum. The copper straight pipe section 111 and the copper transition pipe section 112 are provided in the copper pipe section 110. The diameter of the copper transition pipe section 112 gradually increases until it is the same as the diameter of the aluminum pipe section 120. Compared with the copper straight pipe section 111, the diameter of the copper transition section gradually increases, and the electrical conductivity also increases accordingly. That is, compared with the electrical conductivity of the aluminum pipe section 120 and the copper straight pipe section 111, the electrical conductivity of the copper transition section is larger. Therefore, it effectively avoids the occurrence of electrical conduction obstacles at the copper-aluminum transition and has a margin.

[0049] Optionally, a crimping portion 130 formed by hexagonal crimping followed by spot crimping is formed on the wiring pipe 100. The diameter of the photovoltaic wire 300 is generally small. When using the traditional pit crimping method, the deformation amount of the wiring pipe 100 is large and the structure is unstable. Therefore, the present application adopts a scheme of hexagonal crimping followed by spot crimping to form a stable crimping portion 130.

[0050] Optionally, a plurality of sawtooth strips are formed on the inner surface of the wiring pipe 100. On the one hand, the sawtooth strips can increase the friction between the wiring pipe 100 and the wire metal core 310, improving the stability of the structural connection. On the other hand, they can also pierce the oxide films on the surfaces of the wiring pipe 100 and the wire metal core 310 during the crimping process, improving the stability of the electrical connection.

[0051] The above shows and describes the basic principles, main features and advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0052] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A photovoltaic conductor connection assembly, characterized in that: include: A wire barrel, which is used to be crimped with the wire to connect the wire; An outer sleeve comprises a sleeve body and two sealing pipe caps. The sleeve body is an integrally formed structure. A sleeve channel is provided on the sleeve body. The sleeve channel is used to accommodate a wiring tube after crimping with the wire. The length of the sleeve channel is greater than the length of the wiring tube. Both ends of the sleeve body are provided with sealing locking structures. The two sealing pipe caps are detachably connected to the two ends of the sleeve body respectively, and radial force is applied to the sealing locking structure after being connected to the sleeve body, so that the sealing locking structure is sealed and connected to the outer surface of the wire insulation skin.

2. The photovoltaic conductor connection assembly according to claim 1, characterized in that: The axial length of the sleeve body is L1, the axial length of the wiring tube is L2, and 1.5≤L1 / L2≤5.

3. The photovoltaic conductor connection assembly according to claim 1, characterized in that: The inner surface of the sleeve body is provided with at least one annular protrusion, the inner diameter of the annular protrusion is smaller than the outer diameter of the wire insulation and greater than or equal to the diameter of the wire metal core, and the distance between the annular protrusion and the end of the sleeve body satisfies: when the annular protrusion fits the cross-section of the wire insulation, the sealing and locking structures at both ends of the sleeve body are located outside the wire insulation.

4. The photovoltaic conductor connection assembly according to claim 3, characterized in that: The number of the annular protrusions is two, the two annular protrusions are symmetrically arranged about the central cross section of the sleeve body, and the distance between the two annular protrusions is greater than or equal to the axial length of the wiring tube.

5. The photovoltaic conductor connection assembly according to claim 1, characterized in that: The sealing locking structure comprises a sealing sleeve and a plurality of locking claws, one end of each locking claw is fixedly connected to the sleeve body, and the other end extends in a direction away from the sleeve body, and the plurality of locking claws are arranged in an array around the outer surface of the sealing sleeve; The axial length of the sealing sleeve is greater than the axial extension length of the locking claw. The sealing tube cap is provided with an installation cavity for installing a sealing locking structure. The radial dimension of the installation cavity is smaller than the radial dimension of the sealing locking structure in a natural state.

6. The photovoltaic conductor connection assembly according to claim 5, characterized in that: The outer surface of the sleeve body is provided with an external thread, and the sealing pipe cap is provided with an internal thread matching the external thread.

7. The photovoltaic conductor connection assembly according to claim 1, characterized in that: The wiring tube comprises a copper tube section and an aluminum tube section which are welded together. The copper tube section is used for crimping with a copper wire, and the aluminum tube section is used for crimping with an aluminum wire.

8. The photovoltaic conductor connection assembly according to claim 7, characterized in that: The copper pipe section includes an integrally formed copper straight pipe section and a copper transition pipe section, the copper transition pipe section includes a large end and a small end, and the outer diameter of the copper transition pipe section gradually increases from the small end to the large end; the outer diameter of the small end of the copper transition pipe section is the same as the outer diameter of the copper straight pipe section, and the small end of the copper transition pipe section is connected to the copper straight pipe section, the outer diameter of the large end of the copper transition pipe section is the same as the outer diameter of the aluminum pipe section, and the large end of the copper transition pipe section is welded to the aluminum pipe section.

9. The photovoltaic conductor connection assembly according to claim 1, characterized in that: The wiring tube is provided with a crimping portion for hexagonal crimping and then point crimping.

10. The photovoltaic conductor connection assembly according to claim 1, characterized in that: A plurality of sawtooth strips are formed on the inner surface of the wiring tube.

Images