Rapid waterproof sealing connection structure for photovoltaic power cable

Abstract

The invention relates to the technical field of photovoltaic cable connection, in particular to a photovoltaic power cable rapid waterproof sealing connection structure which comprises a photovoltaic power cable, a cable core input positioning connector, a cable core self-positioning plug connector and a threaded connector. The cable core self-positioning plug connector comprises an external thread sealing cylinder with two open ends, a cable core self-positioning crimping mechanism is arranged in the external thread sealing cylinder in a threaded lifting mode, and the cable core self-positioning crimping mechanism comprises a positioning pressing plate which is arranged on the external thread sealing cylinder in a rotary limiting mode and moves up and down along with the external thread sealing cylinder. A group of sealing positioning screw rods are connected right below the positioning pressing plate in a lifting limiting manner, a cable core crimping connection assembly is arranged at the end part of the inner end of the cable core plugging positioning channel, and the threaded joint comprises an internal threaded rod which is in threaded connection with the interior of the bottom end of the external threaded sealing cylinder. According to the connecting structure, the cable can be quickly and automatically crimped, positioned and fixed, the whole operation is simple, the connection is stable, and the sealing performance is good.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic cable connection, in particular to a photovoltaic power cable rapid waterproof sealing connection structure. Background Art

[0002] Cable connection is a key link in photovoltaic power generation systems. Photovoltaic panel components are mostly distributed under exposed sunlight and are composed of thin solid photovoltaic cells made almost entirely of semiconductor materials. When photovoltaic components are in operation, photovoltaic cables are used for connection. The connection between cables generally involves the connection between photovoltaic components, photovoltaic components and inverters, etc. No matter how the photovoltaic cables are connected, they must maintain stability, sealing and safety after connection.

[0003] The existing patent authorization number is: CN218448642U, which discloses a waterproof connection structure of a power cable for photovoltaic power generation, including a photovoltaic panel, a junction box is provided on the right side of the lower end of the photovoltaic panel, a first connector is provided at the lower end of the junction box, a second connector is plugged and connected to the inner side of the first connector, a protective mechanism is provided on the outer side of the second connector, a fixing mechanism is provided on the inner side of the second connector, and a clamping hole is provided on the inner side of the first connector. The utility model adopts the above structure, and after the first connector and the second connector are installed, the protective sleeve on the outside of the second connector is threadedly connected to the first connector sleeve, so that the inner side of the lower end of the protective sleeve is squeezed against the inclined surface of the extrusion sleeve on the second connector, so that the sealing ring is squeezed on the inclined surface, and a sealing gasket is also provided between the first connector and the protective sleeve, so that both the upper and lower ends are in a sealed state, thereby achieving the effect of waterproof sealing at the cable joint. After analyzing the above connection structure and common connection joints, it can be found that when the cable joint is connected and fixed, the cable joint is still inserted into the specified position first, and then the cable joint is fixed by rotating the fastening bolt. Although this method can stabilize the cable structure, each fastening bolt needs to be screwed during operation. The disadvantage is that the speed is slow, and the operation is inconvenient when connecting in a relatively small space. When connecting multiple cable joints, the connection and installation efficiency is affected. Moreover, after screwing, the outer threaded shell still needs to be rotated for wrapping and tightening, and the overall connection is inconvenient. Therefore, in view of the above-mentioned problems, the present technical solution proposes a photovoltaic power cable quick waterproof sealing connection structure. Summary of the invention

[0004] The object of the present invention is to provide a photovoltaic power cable rapid waterproof sealing connection structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic power cable rapid waterproof sealing connection structure, comprising a photovoltaic power cable, a cable core input positioning joint, a cable core self-positioning plug-in joint, and a threaded joint; after the end of the photovoltaic power cable is stripped, the cable core is plugged into the cable core input positioning joint for pre-positioning, one end of the cable core input positioning joint is anti-detachment rotationally arranged on one side of the cable core self-positioning plug-in joint, and the other end of the cable core self-positioning plug-in joint is threadedly sleeved onto the end of the threaded joint; The cable core input positioning joint includes a stepped cylinder with an opening at one end, and a plurality of axially penetrating cable core input channels are provided in an annular manner at equal intervals inside the threaded joint, and the corresponding input of the cable core passes through the cable core input channel and extends to the inside of the cable core self-positioning plug-in joint; The cable core self-positioning plug-in joint includes an external thread sealing cylinder with openings at both ends, a group of cable core self-positioning crimping mechanisms are arranged in a lifting manner on the internal threads of the external thread sealing cylinder, a cable core plug-in positioning channel corresponding to the cable core input channel in the cable core input positioning joint is opened in the cable core self-positioning crimping mechanism, the cable core extending to the inside of the cable core self-positioning plug-in joint enters the inner end of the cable core plug-in positioning channel at the corresponding position, the cable core self-positioning crimping mechanism includes a positioning pressure plate which is arranged on the external thread sealing cylinder in a rotationally limited manner and moves with the lifting and lowering movement of the external thread sealing cylinder, a group of sealing positioning screws are connected in a lifting and limiting manner directly below the positioning pressure plate, and a plurality of groups of similar types are arranged in an annular manner at equal intervals on the sealing positioning screws with the same number as the cable core plug-in positioning channels The U-shaped swing pressure rod, the top inclined surface of the U-shaped swing pressure rod is in contact with the bottom inclined surface of the positioning pressure plate. The positioning pressure plate follows the lifting and lowering of the external thread sealing cylinder, and controls the U-shaped swing pressure rod to swing synchronously (that is, when the external thread sealing cylinder is rotated to move downward, the positioning pressure plate is driven to move toward the sealing positioning screw, thereby controlling the bottom of the U-shaped swing pressure rod to swing upward obliquely. When the external thread sealing cylinder moves upward, the positioning pressure plate moves away from the sealing positioning screw, and the bottom of the U-shaped swing pressure rod moves back). A cable core crimping connection assembly is provided at the inner end of the cable core plug-in positioning channel. The bottom end of the U-shaped swing pressure rod is in swing contact connection with the cable core crimping connection assembly, which is used to automatically crimp and fix the cable core end extending to the cable core crimping connection assembly; The threaded joint includes an internal threaded rod connected to the internal thread of the bottom end of the external threaded sealing cylinder, a transmission connection base block is installed in the middle of the top of the internal threaded rod, and a plurality of groups of transmission connection terminals with the same number as the cable core plug-in positioning channels are arranged at equal intervals in an annular manner on the circumferential side wall of the transmission connection base block, and the transmission connection terminals are swingably contacted and connected with the cable core crimping connection assembly, and a device connector is connected to the end of the internal threaded rod away from the cable core self-positioning plug-in joint, so as to connect the photovoltaic power cables for power transmission; Among them, when connecting the photovoltaic power cable, the cable core at the end of the photovoltaic power cable is stripped in advance, and then it is extended through the cable core input channel in the stepped cylinder to the cable core self-positioning plug-in joint, and then continues to pass through the cable core plug-in positioning channel and moves to the cable core crimping connection assembly at the inner end of the cable core plug-in positioning channel, and then the transmission connection base block is moved to the bottom of the external thread sealing cylinder, and the external thread sealing cylinder is rotated to control the external thread sealing cylinder and the transmission connection base block to be continuously threadedly connected, and at the same time, the top of the transmission connection base block contacts the bottom of the sealing positioning screw to prevent the sealing positioning screw from moving, and the external thread sealing cylinder is synchronously threadedly connected with the sealing positioning screw and the transmission connection base block. The threaded sealing cylinder continuously wraps the transmission connection base block thread to maintain the internal seal, and synchronously drives the positioning pressure plate to move downward, which in turn drives the positioning pressure plate to apply a swinging thrust to the U-shaped swing pressure rod, and controls the bottom end of the U-shaped swing pressure rod to cooperate with the cable core crimping connection assembly, so as to crimp and position the cable core extending to the inner end of the cable core plug-in positioning channel, and synchronously controls the transmission connection terminal to contact and connect with the cable core crimping connection assembly, thereby realizing the form of mobile connection by only rotating the external threaded sealing cylinder, and automatically positioning, connecting and transmitting the cable core of the photovoltaic power cable, which greatly improves the connection speed to a certain extent, while maintaining the stability of the connection and the overall waterproof sealing effect.

[0006] Compared with the prior art, the beneficial effects of the present invention are: while the outside is fixed by a threaded connection, the cable core pre-inserted into the connection is crimped and fixed, thereby making an electrical connection. Compared with the existing method, the step of screwing and positioning the cable core end is saved, the overall connection speed is greatly improved, and multiple cable cores can be crimped and positioned at the same time, which is simple to operate and has strong applicability. At the same time, the outside is threaded and partially rotated to fit, and the overall sealing and waterproofing safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of a separated first-person perspective structure of a photovoltaic power cable rapid waterproof sealing connection structure; Figure 2 A schematic diagram of a separate second-view structure of a quick waterproof and sealed connection structure for photovoltaic power cables; Figure 3 A schematic diagram of a separated third-view structure of a quick waterproof and sealed connection structure for photovoltaic power cables; Figure 4 It is a schematic diagram of the separated main view internal structure of the photovoltaic power cable quick waterproof and sealed connection structure; Figure 5 It is a schematic diagram of the internal partial structure of the cable core self-positioning plug-in joint in the photovoltaic power cable rapid waterproof and sealed connection structure; Figure 6 for Figure 3A is a schematic diagram of the enlarged structure of the middle part; Figure 7 for Figure 4 A schematic diagram of the enlarged structure of B; Figure 8 for Figure 2 Schematic diagram of the enlarged structure of C; Fig. 9 for Figure 4 Schematic diagram of the enlarged structure of D in the middle; Among them: photovoltaic power cable 10, cable core input positioning joint 11, cable core self-positioning plug-in joint 12, threaded joint 13, cable core input hole 15, cable core input channel 16, cable core output port 17, cable core perforation 18, cable core plug-in hole 19, cable core plug-in positioning channel 20, cable core connection port 21, anti-detachment limit rotating ring 22, anti-detachment limit rotating slide rail 23, threading positioning pin 24, threading positioning hole 25, positioning pressure plate 26, U-shaped swing pressure rod 27, pressure rod swing Groove 28, swing connection terminal 29, fixed pressure connection end 30, side transmission end 31, external cable core transmission body 32, cable core transmission connection positioning hole 33, cable core transmission connection positioning block 34, transmission connection base block 35, transmission connection terminal 36, internal threaded rod 37, external threaded sealing cylinder 38, fixing rod 39, T-shaped slider 40, limiting telescopic rod 41, T-shaped slide groove 42, stepped cylinder 43, return limiting block 44, slide bar 45, buffer groove 46, spring 47, sealing positioning screw 48. DETAILED DESCRIPTION

[0008] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0009] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0010] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0011] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0012] See also Figure 1-Figure 5 The photovoltaic power cable quick waterproof sealing connection structure includes a photovoltaic power cable 10, a cable core input positioning joint 11, a cable core self-positioning plug-in joint 12, and a threaded joint 13; after the end of the photovoltaic power cable 10 is stripped, the cable core is plugged into the cable core input positioning joint 11 for pre-positioning, one end of the cable core input positioning joint 11 is anti-slip rotationally arranged on one side of the cable core self-positioning plug-in joint 12, and the other end of the cable core self-positioning plug-in joint 12 is threadedly mounted on the end of the threaded joint 13; The cable core input positioning joint 11 includes a stepped cylinder 43 with an opening at one end, and a plurality of axially penetrating cable core input channels 16 are provided in an annular manner at equal intervals inside the threaded joint 13. The corresponding input of the cable core passes through the cable core input channel 16 and extends to the inside of the cable core self-positioning plug-in joint 12; The cable core self-positioning plug-in joint 12 includes an external thread sealing cylinder 38 with openings at both ends, and a group of cable core self-positioning crimping mechanisms are arranged in a lifting manner with threads inside the external thread sealing cylinder 38. A cable core plug-in positioning channel 20 corresponding to the cable core input positioning channel 16 in the cable core input positioning joint 11 is opened in the cable core self-positioning crimping mechanism, and the cable core extending to the inside of the cable core self-positioning plug-in joint 12 enters the inner end of the cable core plug-in positioning channel 20 at the corresponding position. The cable core self-positioning crimping mechanism includes a positioning pressing plate 26 that is arranged on the external thread sealing cylinder 38 in a rotationally limited manner and moves up and down with the external thread sealing cylinder 38. A group of sealing positioning screws 48 are connected in a lifting and limiting manner directly below the positioning pressing plate 26, and a plurality of groups of U-type screws with the same number as the cable core plug-in positioning channels 20 are arranged in an annular manner at equal intervals on the sealing positioning screw 48. The U-shaped swing pressure rod 27 is a U-shaped swing pressure rod 27, and the top inclined surface of the U-shaped swing pressure rod 27 is in contact with the bottom inclined surface of the positioning pressure plate 26. When the positioning pressure plate 26 follows the lifting of the external thread sealing cylinder 38, the U-shaped swing pressure rod 27 is controlled to swing synchronously (that is, when the external thread sealing cylinder 38 is rotated to move downward, the positioning pressure plate 26 is driven to move toward the sealing positioning screw 48, thereby controlling the bottom of the U-shaped swing pressure rod 27 to swing upward obliquely. When the external thread sealing cylinder 38 moves upward, the positioning pressure plate 26 moves away from the sealing positioning screw 48, and the bottom of the U-shaped swing pressure rod 27 moves back). The inner end of the cable core plug-in positioning channel 20 is provided with a cable core crimping connection assembly. The bottom end of the U-shaped swing pressure rod 27 is connected to the cable core crimping connection assembly in a swinging contact manner, which is used to automatically crimp and fix the cable core end extending to the cable core crimping connection assembly; The threaded joint 13 includes an internal threaded rod 37 connected to the internal thread of the bottom end of the external threaded sealing cylinder 38, a transmission connection base block 35 is installed at the top middle of the internal threaded rod 37, and a plurality of groups of transmission connection terminals 36 with the same number as the cable core plug-in positioning channels 20 are arranged in an annular manner at equal intervals on the circumferential side wall of the transmission connection base block 35, and the transmission connection terminals 36 are swingably contacted and connected with the cable core crimping connection assembly, and a device connector is connected to the end of the internal threaded rod 37 away from the cable core self-positioning plug-in joint 12, so as to connect the photovoltaic power cable 10 for power transmission; Among them, when connecting the photovoltaic power cable 10, the cable core at the end of the photovoltaic power cable 10 is stripped in advance, and then it is extended through the cable core input channel 16 in the stepped cylinder 43 to the cable core self-positioning plug-in joint 12, and then continues to pass through the cable core plug-in positioning channel 20 to move to the cable core crimping connection assembly at the inner end of the cable core plug-in positioning channel 20, and then the transmission connection base block 35 is moved to the bottom of the external thread sealing cylinder 38, and the external thread sealing cylinder 38 is rotated to control the external thread sealing cylinder 38 and the transmission connection base block 35 to be continuously threadedly connected, and at the same time, the top of the transmission connection base block 35 contacts the bottom of the sealing positioning screw 48 to prevent the sealing positioning screw 48 from moving, and the external thread sealing cylinder 38 is synchronously with the sealing positioning screw 48 and the transmission connection base block 35. Threaded connection, as the external threaded sealing cylinder 38 continuously wraps the transmission connection base block 35 thread, maintains the internal seal, and synchronously drives the positioning pressure plate 26 to move downward, at this time driving the positioning pressure plate 26 to apply a swinging thrust to the U-shaped swing pressure rod 27, controlling the bottom end of the U-shaped swing pressure rod 27 to cooperate with the cable core crimping connection assembly, crimping and positioning the cable core extending to the inner end of the cable core plug-in positioning channel 20, and synchronously controlling the transmission connection terminal 36 to contact and connect with the cable core crimping connection assembly, thereby realizing the form of mobile connection by only rotating the external threaded sealing cylinder 38, and automatically positioning, connecting and transmitting the cable core of the photovoltaic power cable 10, which greatly improves the connection speed to a certain extent, while maintaining the stability of the connection and the overall waterproof sealing effect.

[0013] In the embodiment of the present invention, refer to Figure 6 The lower side of the stepped cylinder 43 is configured as a substantial structure. The top of the cable core input channel 16 is connected to a cable core input hole 15 provided on the upper side of the stepped cylinder 43, and the bottom is connected to a cable core output port 17 provided on the lower side wall of the stepped cylinder 43. The peeled cable cores respectively enter the cable core input channel 16 along the cable core input hole 15, and then move out along the cable core output port 17. A through cable core through hole 18 is provided on the corresponding positioning pressure plate 26 below the cable core output port 17. A cable core plugging hole 19 is provided on the top of the corresponding sealing positioning screw 48 below the cable core through hole 18. The bottom end of the cable core plugging hole 19 is connected to the top of the cable core plugging positioning channel 20, that is, through the cable core input hole 15, the cable core output port 17, the cable core through hole 18, the cable core plugging hole 19, and the cable core plugging positioning channel 20, so that the cable core is smoothly plugged into the cable core plugging positioning channel 20 and the inner end terminal is connected to the cable core crimping connection assembly; Specifically, the inner walls of the cable core input channel 16, the cable core through hole 18, and the cable core plug-in positioning channel 20 are set to be insulating smooth surface structures, that is, to keep the cable core moving smoothly and safely therein; A circle of anti-separation limit rotating ring 22 is installed at the bottom end of the stepped cylinder 43. The vertical section of the anti-separation limit rotating ring 22 is set to an obtuse triangle structure. The top of the external thread sealing cylinder 38 corresponding to the anti-separation limit rotating ring 22 is provided with a circle of anti-separation limit rotating slide rail 23 rotatably connected to the anti-separation limit rotating ring 22. The anti-separation limit rotating ring 22 is rotatably arranged along the inside of the anti-separation limit rotating slide rail 23, that is, when the external thread sealing cylinder 38 moves up and down, the anti-separation limit rotating ring 22 is kept in a stationary device relative to the external thread sealing cylinder 38, and keeps synchronous movement in the axial direction; Specifically, in order to keep the cable core input hole 15, the cable core input channel 16, the cable core output port 17, the cable core through-hole 18, the cable core plug-in hole 19, and the cable core plug-in positioning channel 20 consistent in the vertical direction, a group of threading positioning pins 24 are installed on one side of the top of the positioning pressure plate 26, and a threading positioning hole 25 is provided at the bottom of the stepped cylinder 43 corresponding to the top of the threading positioning pin 24. The threading positioning pin 24 is plugged into the threading positioning hole 25, and an anti-detachment cap is provided on the top of the threading positioning pin 24, so that when it is placed in the threading positioning hole 25 and moved, it will not detach from the inside of the threading positioning hole 25.

[0014] In one embodiment of the present invention, see Figure 8 A pressure rod swinging groove 28 is provided on the sealing positioning screw 48 corresponding to the U-shaped swinging pressure rod 27. The middle part of the U-shaped swinging pressure rod 27 is connected to the inner wall of the U-shaped swinging pressure rod 27 by rotating the shaft. At the same time, a spring is provided at the end of the shaft. When the spring is in a free state, the bottom end of the U-shaped swinging pressure rod 27 is controlled to be in a state of being far away from the cable core crimping connection component, that is, when the positioning pressure plate 26 is not in contact with the top inclined surface of the U-shaped swinging pressure rod 27, the cable core crimping connection component is in a state of being unstressed, that is, the cable core is kept plugged in smoothly. It should be noted that the diameter of the sealing positioning screw 48 is the same as that of the transmission connection base block 35, and both are stably threadedly connected to the inner side of the external threaded sealing cylinder 38 to ensure the overall sealing of the inner side of the cable core self-positioning plug-in joint 12 after the external threaded sealing cylinder 38 is wrapped around the outer side of the transmission connection base block 35. At the same time, a layer of sealing ring is arranged on the outer side of the anti-disengagement limit rotating ring 22 to maintain full contact between the anti-disengagement limit rotating ring 22 and the anti-disengagement limit rotating slide rail 23 after the external threaded sealing cylinder 38 is lowered, so as to seal the top of the cable core self-positioning plug-in joint 12.

[0015] As a preferred embodiment of the present invention, refer to Fig. 9 , Figure 5The positioning plate 26 is set to an inverted truncated cone structure. A plurality of fixing rods 39 are installed at equal intervals in a ring on the circumferential outer wall of the positioning plate 26. A T-shaped slider 40 is installed at the end of the fixing rod 39. At the same time, a non-tooth groove area is provided on the upper side of the inner ring wall of the external thread sealing cylinder 38. A circle of T-shaped slide grooves 42 are provided at the non-tooth groove area on the inner wall of the external thread sealing cylinder 38 corresponding to the T-shaped slider 40. The T-shaped slider 40 slides inside the T-shaped slide groove 42. At the same time, a group of vertical limiting telescopic rods 41 are connected to the fixing rod 39. A telescopic hole is provided on the top inner wall of the sealing positioning screw 48 corresponding to the limiting telescopic rod 41. An anti-detachment cap is provided at the end of the limiting telescopic rod 41 placed inside the telescopic hole, that is, the limiting telescopic rod 41 is kept placed in the telescopic hole for lifting and lowering, the rotation positioning of the cable core input channel 16 is maintained, and the stable lifting and lowering is controlled; Specifically, since the positioning pressure plate 26 is set as an inverted truncated cone structure, in order to keep the bottom of the cable core through-hole 18 in full contact with the cable core plug-in hole 19 and control the smooth transmission of the cable core, the top of the sealing positioning screw 48 is set as an arc groove structure that cooperates with the bottom of the positioning pressure plate 26. When the positioning pressure plate 26 is controlled to move toward the sealing positioning screw 48, the bottom of the positioning pressure plate 26 is in full contact with the top of the sealing positioning screw 48.

[0016] As a preferred embodiment of the present invention, refer to Figure 1-Figure 5 , Figure 7 , Figure 8 The cable core crimping connection assembly includes an external cable core transmission body 32 fixedly installed at the bottom of the sealing positioning screw 48 and distributed in a ring-shaped and evenly spaced manner. The number of the external cable core transmission bodies 32 is the same as the cable core plug-in positioning channel 20, and radially distributed through holes are opened inside the external cable core transmission body 32. The end of the through hole facing the center of the sealing positioning screw 48 is upwardly connected to the cable core plug-in positioning channel 20. The cable core extending into the cable core plug-in positioning channel 20 extends to the inner end of the through hole. The inner end of the through hole is provided with a downward cable core connection port 21. The cable core extends to the cable core connection port 21. At the same time, a group of swing connection terminals 29 are installed at the bottom end of the U-shaped swing pressure rod 27, and a constant pressure is installed at the middle of the top of the swing connection terminal 29. The connecting end 30 has a side transmission end 31 installed in the middle of the side wall. The fixed pressure connecting end 30 is electrically connected to the inner end of the side transmission end 31. When the U-shaped swinging pressure rod 27 is swung by the pressure of the positioning pressure plate 26, the swinging connection terminal 29 is controlled to swing obliquely upward, thereby controlling the fixed pressure connecting end 30 to be squeezed toward the inside of the cable core connection port 21, and the cable core extending to the cable core connection port 21 is crimped and connected. At the same time, the transmission connection terminal 36 on the side wall of the transmission connection base block 35 is continuously sleeved onto the transmission connection base block 35 along with the external thread sealing cylinder 38, and the contact and extrusion force between the side transmission end 31 and the transmission connection base block 35 is gradually increased, thereby connecting the cable core connection port 21 with the transmission connection base block 35; It should be noted that, when the transmission connection base block 35 is initially connected to the bottom of the external thread sealing cylinder 38, the transmission connection base block 35 is manually controlled to move to the lower side of the sealing positioning screw 48. At this time, the transmission connection terminal 36 is above the initial position of the side transmission end 31 in height. As the U-shaped swing pressure rod 27 is swung under pressure, the fixed crimping end 30 is controlled to be crimped with the cable core connection port 21, and the side transmission end 31 is gradually contacted with the transmission connection terminal 36, thereby realizing an automatic contact connection mode. Specifically, the connection between the through hole and the cable core insertion positioning channel 20 is set to be an arc-shaped smooth connection to ensure that the cable core can move smoothly; Specifically, in order to ensure that the transmission connection terminal 36 on the transmission connection base block 35 can be accurately positioned, contacted and connected with the side transmission end 31, a group of cable core transmission connection positioning blocks 34 with an equilateral triangle structure are fixedly installed in the middle of the top of the transmission connection base block 35, and a cable core transmission connection positioning hole 33 is opened in the middle of the bottom of the sealing positioning screw 48 corresponding to the cable core transmission connection positioning block 34. When the transmission connection base block 35 moves toward the bottom of the sealing positioning screw 48, the cable core transmission connection positioning block 34 is pre-positioned by plugging it into the transmission connection base block 35, that is, the accuracy of subsequent connection is maintained.

[0017] As a preferred embodiment of the present invention, refer to Figure 7 A group of elastic return-blocking members are arranged inside the through hole to prevent the cable core extending to the cable core connection port 21 from automatically moving back or moving back only when subjected to a certain pulling force. The elastic return-blocking members include buffer grooves 46 symmetrically arranged on the upper and lower sides of the through hole. A return limit block 44 for vertical movement is elastically connected inside the buffer groove 46 through a spring 47. The return limit block 44 is arranged in a right-angle trapezoidal structure. Slide bars 45 are installed on both sides of the return limit block 44 arranged inside the buffer groove 46. The slide bars 45 move up and down along the inner wall of the buffer groove 46. The inclined surface of the return limit block 44 is distributed toward one side of the through hole axis. The cable core entering along the through hole can smoothly pass through the return limit blocks 44 on both sides and enter the cable core connection port 21. When subjected to a return pulling force, the return limit block 44 will produce a certain resistance to it.

[0018] The working principle of the present invention is: in the idle position of the device, all the driving parts mentioned above, which refer to power elements, electrical components and adapted power supplies, are connected through wires, and the electrical connections are completed in a sequential working order between the electrical components. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and does not explain the electrical control. When connecting the photovoltaic power cable 10, the present connection structure with the number of cable core plug-in positioning channels 20 that is consistent with or greater than the number of cable cores inside the photovoltaic power cable 10 is selected, and then the connection and installation are performed. Initially, the end of the photovoltaic power cable 10 is peeled to leak the cable core, and then plugged downward along the cable core input hole 15 inside the stepped cylinder 43, and successively extend through the cable core input channel 16, the cable core output port 17, the cable core through-hole 18, the cable core plug-in hole 19, and the cable core plug-in positioning channel 20 to the inside of the through hole, and then blocked by the return limit block 44 until the end moves to the cable core connection port 21, and then the handheld transmission connection base is held. The block 35 moves it to the bottom of the sealing positioning screw 48, applies a moving top force to the sealing positioning screw 48, and then rotates the external thread sealing cylinder 38 and simultaneously threads it with the sealing positioning screw 48 and the transmission connection base block 35. At this time, the external thread sealing cylinder 38 continuously moves downward, and then under the rotation limit of the T-shaped slider 40 and the limiting telescopic rod 41, the positioning pressure plate 26 is controlled to descend, and then the U-shaped swing pressure rod 27 is pushed to swing, and the bottom of the U-shaped swing pressure rod 27 swings obliquely upward. At this time, the fixed crimping end 30 is controlled to be crimped and connected with the cable core end inside the cable core connection port 21, and at the same time, the side transmission end 31 is controlled to contact and connect with the transmission connection terminal 36 on the side wall of the transmission connection base block 35, so as to realize the automatic, fast and stable connection of the photovoltaic power cable 10, and at the same time, the threaded connection between the external thread sealing cylinder 38 and the transmission connection base block 35, the sealing positioning screw 48 and the rotation fit between the anti-disengagement limiting rotating ring 22 and the anti-disengagement limiting rotating slide rail 23 are used to maintain the seal of the photovoltaic power cable 10 after connection.

[0019] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. Photovoltaic power cable rapid waterproof sealing connection structure, characterized in that: It comprises a photovoltaic power cable (10), a cable core input positioning joint (11), a cable core self-positioning plug-in joint (12), and a threaded joint (13); after the end of the photovoltaic power cable (10) is stripped, the cable core is plugged into the cable core input positioning joint (11) for pre-positioning; one end of the cable core input positioning joint (11) is rotatably arranged on one side of the cable core self-positioning plug-in joint (12); the other end of the cable core self-positioning plug-in joint (12) is threadedly sleeved onto the end of the threaded joint (13); the cable core input positioning joint (11) comprises a stepped cylinder (43) with an opening at one end; and a plurality of axially penetrating cable core input channels (16) are provided in an annular manner at equal intervals inside the threaded joint (13); The cable core self-positioning plug-in joint (12) comprises an external thread sealing cylinder (38) with openings at both ends, the internal thread of the external thread sealing cylinder (38) is provided with a set of cable core self-positioning crimping mechanisms in a lifting manner, the cable core self-positioning crimping mechanisms are provided with a cable core plug-in positioning channel (20) corresponding to the cable core input channel (16) in the cable core input positioning joint (11), the cable core self-positioning crimping mechanism comprises a rotationally limited arrangement on the external thread sealing cylinder (38) and raised and lowered with the external thread sealing cylinder (38) A pressure plate (26) is provided, and a group of sealing positioning screws (48) are connected in a lifting and limiting manner directly below the positioning pressure plate (26). A plurality of groups of U-shaped swing pressure rods (27) are arranged in an annular manner at equal intervals on the sealing positioning screws (48), the same number as the cable core plug-in positioning channel (20). The top inclined surface of the U-shaped swing pressure rod (27) contacts the bottom inclined surface of the positioning pressure plate (26). The inner end of the cable core plug-in positioning channel (20) is provided with a cable core crimping connection component that is swingably contacted with the bottom end of the U-shaped swing pressure rod (27).

2. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 1 is characterized in that: The lower side of the interior of the stepped cylinder (43) is configured as a substantial structure, the top of the cable core input channel (16) is connected to a cable core input hole (15) provided on the upper side of the interior of the stepped cylinder (43), and the bottom is connected to a cable core output port (17) provided on the lower side wall of the stepped cylinder (43), a cable core through hole (18) penetrating therethrough is provided on a corresponding positioning pressure plate (26) below the cable core output port (17), a cable core plug-in hole (19) is provided on the top of a corresponding sealing positioning screw (48) below the cable core through hole (18), and the bottom end of the cable core plug-in hole (19) is connected to the top of the cable core plug-in positioning channel (20); The threaded joint (13) comprises an internal threaded rod (37) connected to the internal thread of the bottom end of the external threaded sealing cylinder (38); a transmission connection base block (35) is installed in the middle of the top of the internal threaded rod (37); a plurality of groups of transmission connection terminals (36) having the same number as the cable core plug-in positioning channels (20) and being swingably connected to the cable core crimping connection assembly are arranged at equal intervals in an annular manner on the circumferential side wall of the transmission connection base block (35); and a device connector is connected to the end of the internal threaded rod (37) away from the cable core self-positioning plug-in joint (12).

3. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 2 is characterized in that: A circle of anti-separation limit rotating ring (22) is installed at the bottom end of the stepped cylinder (43), and the vertical section of the anti-separation limit rotating ring (22) is set to an obtuse triangle structure. The top of the external thread sealing cylinder (38) corresponding to the anti-separation limit rotating ring (22) is provided with a circle of anti-separation limit rotating slide rail (23) rotatably connected to the anti-separation limit rotating ring (22), and the anti-separation limit rotating ring (22) is rotatably arranged inside the anti-separation limit rotating slide rail (23).

4. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 3 is characterized in that: A group of threading positioning pins (24) are installed on one side of the top of the positioning plate (26), and a threading positioning hole (25) is opened at the bottom of the stepped cylinder (43) corresponding to the top of the threading positioning pin (24). The threading positioning pin (24) is inserted into the threading positioning hole (25), and an anti-detachment cap is arranged on the top of the threading positioning pin (24).

5. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 4, characterized in that: A pressure rod swing groove (28) is provided on the sealing positioning screw (48) corresponding to the U-shaped swing pressure rod (27); the middle part of the U-shaped swing pressure rod (27) is rotatably connected to the inner wall of the U-shaped swing pressure rod (27) via a rotating shaft; a spring is sleeved on the end of the rotating shaft; when the spring is in a free state, the bottom end of the U-shaped swing pressure rod (27) is controlled to be in a state of being separated from the cable core crimping connection assembly.

6. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 5, characterized in that: The positioning plate (26) is configured as an inverted truncated cone structure. A plurality of fixing rods (39) are annularly and evenly spaced on the circumferential outer wall of the positioning plate (26). A T-shaped slider (40) is installed at the end of the fixing rod (39). A non-tooth groove area is provided on the upper side of the inner ring wall of the external thread sealing cylinder (38). A circle of T-shaped sliding grooves (42) are provided in the non-tooth groove area on the inner wall of the external thread sealing cylinder (38) corresponding to the T-shaped slider (40). The T-shaped slider (40) slides along the inside of the T-shaped sliding groove (42). A group of vertical limiting telescopic rods (41) are connected to the fixing rod (39). A telescopic hole is provided on the top inner wall of the sealing positioning screw (48) corresponding to the limiting telescopic rod (41). An anti-detachment cap is provided at the end of the limiting telescopic rod (41) disposed inside the telescopic hole.

7. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 6, characterized in that: The top of the sealing positioning screw (48) is arranged as an arc-shaped groove structure that cooperates with the bottom of the positioning pressure plate (26).

8. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 7, characterized in that: The cable core crimping connection assembly comprises external cable core transmission bodies (32) fixedly mounted at the bottom of the sealing positioning screw (48) and distributed in an annular manner with equal intervals. The number of the external cable core transmission bodies (32) is the same as the cable core plug-in positioning channel (20), and radially distributed through holes are opened inside the external cable core transmission bodies (32). The end of the through hole facing the center of the sealing positioning screw (48) is upwardly connected to the cable core plug-in positioning channel (20), and the cable core extending into the cable core plug-in positioning channel (20) extends to the inner end of the through hole. The inner end of the through hole is provided with a downwardly facing cable core connection port (21). A group of swing connection terminals (29) are installed at the bottom end of the U-shaped swing pressure rod (27), a fixed crimping end (30) is installed at the middle of the top of the swing connection terminal (29), and a side transmission end (31) is installed at the middle of the side wall. The fixed crimping end (30) and the inner end of the side transmission end (31) are electrically connected.

9. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 8, characterized in that: A group of cable core transmission connection positioning blocks (34) with an equilateral triangle structure are fixedly mounted on the top middle portion of the transmission connection base block (35), and a cable core transmission connection positioning hole (33) is provided on the bottom middle portion of the sealing positioning screw (48) corresponding to the cable core transmission connection positioning block (34).

10. The photovoltaic power cable rapid waterproof sealing connection structure according to claim 9, characterized in that: A group of elastic return-blocking members are arranged inside the through hole, and the elastic return-blocking members include buffer grooves (46) symmetrically arranged on the upper and lower sides of the through hole, and a return-limiting block (44) that moves vertically is elastically connected inside the buffer groove (46) through a spring (47), and the return-limiting block (44) is arranged in a right-angle trapezoidal structure, and slide bars (45) are installed on both sides of the return-limiting block (44) arranged inside the buffer groove (46), and the slide bars (45) move up and down along the inner wall of the buffer groove (46), and the inclined surface of the return-limiting block (44) is distributed toward one side of the axis of the through hole.

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