Quick waterproof and sealed connection structure for photovoltaic power cables

Abstract

The present invention relates to the technical field of photovoltaic cable connection, specifically a rapid waterproof and sealed connection structure for photovoltaic power cables, including a photovoltaic power cable, a core input positioning joint, a core self-positioning plug-in joint, and a threaded joint; the core self-positioning plug-in joint includes an externally threaded sealing cylinder with openings at both ends, and a set of core self-positioning crimping mechanisms are arranged in a threaded lifting manner inside the externally threaded sealing cylinder. The core self-positioning crimping mechanism includes a positioning pressing plate that is rotatably limited and arranged on the externally threaded sealing cylinder and moves up and down following the externally threaded sealing cylinder. A set of sealing positioning screws are connected in a lifting and limiting manner directly below the positioning pressing plate. A core crimping connection assembly is arranged at the end of the inner part of the core plug-in positioning channel. The threaded joint includes an inner threaded rod that is internally threaded and connected to the bottom end of the externally threaded sealing cylinder. This connection structure can quickly and automatically crimp, position, and fix the cable, with simple overall operation, stable connection, and good sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cable connection, and specifically to a rapid waterproof and sealed connection structure for photovoltaic power cables. Background Art

[0002] The cable connection in a photovoltaic power generation system is a key link. Photovoltaic panel components are mostly distributed and exposed to sunlight, and are composed of thin solid photovoltaic cells made almost entirely of semiconductor materials. When the photovoltaic components are operating, photovoltaic cables are used for connection. The connection between cables generally involves the connection between photovoltaic components, between photovoltaic components and inverters, etc. No matter how the photovoltaic cables are connected, the stability, tightness and safety after connection need to be maintained.

[0003] The existing patent authorization number is: CN218448642U, which discloses a waterproof connection structure for power cables used in photovoltaic power generation, including a photovoltaic panel. A junction box is provided on the lower right side of the photovoltaic panel. A first connector is provided at the lower end of the junction box. A second connector is inserted and connected inside the first connector. A protection mechanism is provided outside the second connector, a fixing mechanism is provided inside the second connector, and a card hole is provided inside the first connector. With the above structure, after the first connector and the second connector are installed, the protective sleeve outside the second connector is threadedly connected with the first sleeve, so that the inner side of the lower end of the protective sleeve is pressed against the inclined surface of the sleeve extruded on the second connector, so that the sealing ring is pressed against the inclined surface. At the same time, 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, thus 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 connecting and fixing the cable joint, the cable joint is still first inserted into the specified position, and then the cable joint is fixed by rotating the fastening bolt. Although this method can stabilize the cable structure, during operation, each fastening bolt needs to be screwed, the disadvantage is that the speed is slow, and it is inconvenient to operate when connecting in a relatively narrow space. Moreover, when connecting multiple cable joints, it affects the connection and installation efficiency. And after screwing, it is still necessary to rotate the outer threaded housing for wrapping and fastening, and the overall connection is relatively inconvenient;

[0004] Therefore, in view of the above existing problems, the present technical solution proposes a rapid waterproof and sealed connection structure for photovoltaic power cables. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid waterproof and sealed connection structure for photovoltaic power cables to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a rapid waterproof and sealed connection structure for photovoltaic power cables, including a photovoltaic power cable, a core input positioning joint, a core self-positioning plug-in joint, and a threaded joint; after the end of the photovoltaic power cable is peeled off, the core is inserted into the inside of the core input positioning joint for pre-positioning. One end of the core input positioning joint is rotatably and anti-disengagingly arranged inside one side of the core self-positioning plug-in joint, and the other end of the core self-positioning plug-in joint is threadedly sleeved on the end of the threaded joint;

[0007] The core input positioning joint includes a stepped cylinder with an open end. A plurality of axially penetrating core input channels are annularly and equally spaced inside the threaded joint. The core correspondingly passes through the core input channels and extends into the inside of the core self-positioning plug-in joint;

[0008] The core self-positioning plug-in joint includes an externally threaded sealing cylinder with both ends open. A set of core self-positioning crimping mechanisms are threadedly arranged in a lifting manner inside the externally threaded sealing cylinder. A core plug-in positioning channel corresponding to the core input channel in the core input positioning joint is provided in the core self-positioning crimping mechanism. The core extending into the inside of the core self-positioning plug-in joint enters the inner end of the corresponding core plug-in positioning channel. The core self-positioning crimping mechanism includes a positioning pressure plate rotatably and limitedly arranged on the externally threaded sealing cylinder and moving up and down following the externally threaded sealing cylinder. A set of sealing positioning screws are connected in a lifting and limiting manner directly below the positioning pressure plate. A plurality of sets of U-shaped swing pressure rods equal in number to the core plug-in positioning channels are annularly and equally spaced on the sealing positioning screws. The top inclined surface of the U-shaped swing pressure rod is in contact distribution with the bottom inclined surface of the positioning pressure plate. While the positioning pressure plate moves up and down following the externally threaded sealing cylinder, it controls the U-shaped swing pressure rod to swing synchronously (that is, when the externally threaded sealing cylinder is rotated downward, it drives the positioning pressure plate to move towards the sealing positioning screw, thereby controlling the bottom of the U-shaped swing pressure rod to swing obliquely upward. When the externally threaded 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 returns). A core crimping connection component is arranged at the inner end of the core plug-in positioning channel. The bottom end of the U-shaped swing pressure rod is in swing contact connection with the core crimping connection component, and is used for automatically crimping and fixing the end of the core extending to the core crimping connection component;

[0009] The threaded joint includes an inner threaded rod threadedly connected to the inside of the bottom end of the externally threaded sealing cylinder. A transmission connection base block is installed in the middle of the top of the inner threaded rod. A plurality of sets of transmission connection terminals equal in number to the core plug-in positioning channels are annularly and equally spaced on the circumferential side wall of the transmission connection base block. The transmission connection terminals are in swing contact connection with the core crimping connection component. One end of the inner threaded rod away from the core self-positioning plug-in joint is connected with an equipment connector, so as to perform power transmission after connecting the photovoltaic power cable;

[0010] Among them, when connecting the photovoltaic power cable, the cable core at the end of the photovoltaic power cable is peeled off in advance, then passed through the cable core input channel in the stepped cylinder and extended to the cable core self-positioning plug joint, and then continued to move through the cable core plugging positioning channel to the cable core crimping connection assembly at the inner end of the cable core plugging positioning channel. Then, the transmission connection base block is moved to the inside of the bottom of the external thread sealing cylinder, and the external thread sealing cylinder is rotated to control the continuous threaded connection between the external thread sealing cylinder and the transmission connection base block. 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 to the sealing positioning screw and the transmission connection base block. As the external thread sealing cylinder continuously threadedly wraps the transmission connection base block to maintain internal sealing, it synchronously drives the positioning pressure plate to move downward. At this time, it drives the positioning pressure plate to apply a swinging thrust to the U-shaped swinging pressure rod, controls the cooperation between the bottom end of the U-shaped swinging pressure rod and the cable core crimping connection assembly, crimps and positions the cable core extending to the end of the inner end of the cable core plugging positioning channel, and synchronously controls the transmission connection terminal to contact and connect with the cable core crimping connection assembly. In this way, the form of moving connection is realized by only rotating the external thread sealing cylinder, and the connection mode of automatically positioning and connecting and transmitting the cable core of the photovoltaic power cable is achieved, which greatly improves the connection speed to a certain extent, and at the same time maintains the stability of the connection and the overall waterproof and sealing effect.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: while fixing the outside by threaded connection, the cable core pre-inserted into the connection is fixed by crimping, and then electrically connected. Compared with the existing method, the steps of screwing and positioning the end of the cable core are saved, the overall connection speed is greatly improved, and at the same time, multiple cable cores can be crimped and positioned. The operation is simple, the applicability is strong, and at the same time, the external is connected by short-thread connection and locally rotated and fitted, and the overall has high sealing and waterproof safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the separated first perspective structure of the rapid waterproof and sealing connection structure for photovoltaic power cables;

[0013] Figure 2 It is a schematic diagram of the separated second perspective structure of the rapid waterproof and sealing connection structure for photovoltaic power cables;

[0014] Figure 3 It is a schematic diagram of the separated third perspective structure of the rapid waterproof and sealing connection structure for photovoltaic power cables;

[0015] Figure 4 It is a schematic diagram of the separated front view internal structure of the rapid waterproof and sealing connection structure for photovoltaic power cables;

[0016] Figure 5It is a schematic diagram of the internal partial structure of the cable core self-aligning plug joint in the rapid waterproof and sealed connection structure for photovoltaic power cables;

[0017] Figure 6 It is Figure 3 The enlarged structure schematic diagram of A in;

[0018] Figure 7 It is Figure 4 The enlarged structure schematic diagram of B in;

[0019] Figure 8 It is Figure 2 The enlarged structure schematic diagram of C in;

[0020] Figure 9 It is Figure 4 The enlarged structure schematic diagram of D in;

[0021] Wherein: photovoltaic power cable 10, cable core input positioning joint 11, cable core self-aligning plug 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 plugging hole 19, cable core plugging positioning channel 20, cable core connection port 21, anti-disengagement limit rotating ring 22, anti-disengagement limit rotating slide rail 23, wire threading positioning pin 24, wire threading positioning hole 25, positioning pressing plate 26, U-shaped swing pressing rod 27, pressing 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 thread sealing cylinder 38, fixed rod 39, T-shaped slider 40, limit telescopic rod 41, T-shaped chute 42, stepped cylinder 43, return limit block 44, slide bar 45, buffer groove 46, spring 47, sealing positioning screw 48. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0025] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0026] Please refer to Figures 1-5 , a rapid waterproof and sealed connection structure for photovoltaic power cables, including a photovoltaic power cable 10, a core input positioning joint 11, a core self-positioning plug-in joint 12, and a threaded joint 13; after the end of the photovoltaic power cable 10 is stripped, the core is inserted and input into the interior of the core input positioning joint 11 for pre-positioning. One end of the core input positioning joint 11 is rotatably and anti-detachably arranged inside one side of the core self-positioning plug-in joint 12, and the other end of the core self-positioning plug-in joint 12 is threadedly sleeved on the end of the threaded joint 13;

[0027] The core input positioning joint 11 includes a stepped cylinder 43 with an open end. A plurality of axially penetrating core input channels 16 are annularly and equally spaced inside the stepped cylinder 43. The cores correspondingly penetrate through the core input channels 16 and extend into the interior of the core self-positioning plug-in joint 12;

[0028] The cable core self - positioning plug - in joint 12 includes an externally threaded sealing cylinder 38 with openings at both ends. Inside the externally threaded sealing cylinder 38, a set of cable core self - positioning crimping mechanisms is arranged in a threaded lifting manner. In the cable core self - positioning crimping mechanism, there is a cable core plug - in positioning channel 20 corresponding to the cable core input channel 16. The cable core extending into the cable core self - positioning plug - in joint 12 enters the inner end of the corresponding cable core plug - in positioning channel 20. The cable core self - positioning crimping mechanism includes a positioning pressing plate 26 that is rotation - limitedly arranged on the externally threaded sealing cylinder 38 and moves up and down following the externally threaded sealing cylinder 38. A set of sealing and positioning screw rods 48 is connected in a lifting - limited manner directly below the positioning pressing plate 26. On the sealing and positioning screw rods 48, a plurality of sets of U - shaped swing pressing rods 27 with the same number as the cable core plug - in positioning channels 20 are arranged at equal intervals in a ring. The top inclined surface of the U - shaped swing pressing rod 27 is in contact distribution with the bottom inclined surface of the positioning pressing plate 26. When the positioning pressing plate 26 moves up and down following the externally threaded sealing cylinder 38, it controls the synchronous swing of the U - shaped swing pressing rods 27 (that is, when rotating the externally threaded sealing cylinder 38 downward, it drives the positioning pressing plate 26 to move towards the sealing and positioning screw rod 48, thereby controlling the bottom of the U - shaped swing pressing rod 27 to swing obliquely upward. When the externally threaded sealing cylinder 38 moves upward, the positioning pressing plate 26 moves away from the sealing and positioning screw rod 48, and the bottom of the U - shaped swing pressing rod 27 moves back). At the inner end of the cable core plug - in positioning channel 20, there is a cable core crimping connection assembly. The bottom end of the U - shaped swing pressing rod 27 is in swing - contact connection with the cable core crimping connection assembly, which is used to automatically crimp and fix the end of the cable core extending to the cable core crimping connection assembly;

[0029] The threaded joint 13 includes an inner threaded rod 37 that is internally threaded - connected to the bottom end of the externally threaded sealing cylinder 38. In the middle of the top of the inner threaded rod 37, a transmission connection base block 35 is installed. On the circumferential side wall of the transmission connection base block 35, a plurality of sets of transmission connection terminals 36 with the same number as the cable core plug - in positioning channels 20 are arranged at equal intervals in a ring. The transmission connection terminals 36 are in swing - contact connection with the cable core crimping connection assembly. One end of the inner threaded rod 37 away from the cable core self - positioning plug - in joint 12 is connected with a device connector, so as to conduct power transmission after connecting the photovoltaic power cable 10;

[0030] Among them, when connecting the photovoltaic power cable 10, the cable core at the end of the photovoltaic power cable 10 is pre-stripped, and then passed through the cable core input channel 16 in the stepped cylinder 43 and extended into the cable core self-positioning plug joint 12, and then continue to pass through the cable core plugging positioning channel 20 and move to the cable core crimping connection assembly at the inner end of the cable core plugging positioning channel 20. Then, the transmission connection base block 35 is moved to the inside of the bottom of the external thread sealing cylinder 38, and the external thread sealing cylinder 38 is rotated to control the continuous threaded connection between the external thread sealing cylinder 38 and the transmission connection base block 35. 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 threadedly connected to the sealing positioning screw 48 and the transmission connection base block 35. As the external thread sealing cylinder 38 continuously wraps the transmission connection base block 35 threadedly to maintain internal sealing, it synchronously drives the positioning pressure plate 26 to move downward. At this time, the positioning pressure plate 26 is driven to apply a swinging thrust to the U-shaped swinging pressure rod 27, controlling the bottom end of the U-shaped swinging pressure rod 27 to cooperate with the cable core crimping connection assembly to crimp and position the cable core extending to the inner end of the cable core plugging positioning channel 20, and synchronously controlling the transmission connection terminal 36 to contact and connect with the cable core crimping connection assembly. In this way, the connection mode of automatically positioning and connecting and transmitting the cable core of the photovoltaic power cable 10 is realized in the form of only rotating the external thread sealing cylinder 38 for moving connection, which greatly improves the connection speed to a certain extent, and at the same time maintains the connection stability and the overall waterproof and sealing effect.

[0031] In the embodiment of the present invention, referring to Figure 6 , the lower side inside the stepped cylinder 43 is set as a solid structure. The top of the cable core input channel 16 communicates with the cable core input hole 15 opened on the upper side inside the stepped cylinder 43, and the bottom communicates with the cable core output port 17 opened on the lower side wall of the stepped cylinder 43. The stripped cable core enters the inside of the cable core input channel 16 along the cable core input hole 15 respectively, and then moves out along the cable core output port 17. A through cable core perforation 18 is opened on the positioning pressure plate 26 corresponding to the lower side of the cable core output port 17, and a cable core plugging hole 19 is opened on the top of the sealing positioning screw 48 corresponding to the lower side of the cable core perforation 18. The bottom end of the cable core plugging hole 19 communicates with 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 perforation 18, the cable core plugging hole 19, and the cable core plugging positioning channel 20, the cable core is smoothly plugged and input to the inner end of the cable core plugging positioning channel 20 and connected to the cable core crimping connection assembly;

[0032] Specifically, the inner walls of the cable core input channel 16, the cable core perforation 18, and the cable core plugging positioning channel 20 are set as insulating smooth surface structures, that is, to ensure the smooth and safe movement of the cable core inside them;

[0033] A anti - detachment limit rotating ring 22 is installed at the bottom end of the stepped cylinder 43. The vertical cross - section of the anti - detachment limit rotating ring 22 is set as an obtuse - triangle structure. At the inner top of the corresponding external - thread sealing cylinder 38 of the anti - detachment limit rotating ring 22, a circle of anti - detachment limit rotating slide rails 23 which are rotatably connected with the anti - detachment limit rotating ring 22 is arranged. The anti - detachment limit rotating ring 22 is rotatably arranged along the inside of the anti - detachment limit rotating slide rails 23. That is, when the external - thread sealing cylinder 38 moves up and down, the anti - detachment limit rotating ring 22 remains static relative to the external - thread sealing cylinder 38, and moves synchronously in the axial direction;

[0034] Specifically, in order to keep the hole positions of the cable core input hole 15, the cable core input channel 16, the cable core output port 17, the cable core perforation 18, the cable core insertion hole 19, and the cable core insertion positioning channel 20 consistent in the vertical direction, a group of wire - threading positioning pins 24 are installed on one side of the top of the positioning pressing plate 26. Threading positioning holes 25 are opened at the bottom of the stepped cylinder 43 corresponding to the top ends of the wire - threading positioning pins 24. The wire - threading positioning pins 24 are inserted into the threading positioning holes 25. Anti - detachment caps are arranged at the tops of the wire - threading positioning pins 24, so that when they move inside the threading positioning holes 25, they will not detach from the inside of the threading positioning holes 25.

[0035] In an example of the present invention, refer to Figure 8 , on the corresponding sealing positioning screw 48 of the U - shaped swing pressing rod 27, a pressing rod swing groove 28 is opened. The middle part of the U - shaped swing pressing rod 27 is rotatably connected to the inner wall of the U - shaped swing pressing rod 27 through a rotating shaft. At the same time, a clockwork spring is sleeved at the end of the rotating shaft. When the clockwork spring is in a free state, it controls the bottom end of the U - shaped swing pressing rod 27 and the cable core crimping connection assembly to be in a state of being far apart. That is, when the positioning pressing plate 26 does not contact the top inclined surface of the U - shaped swing pressing rod 27, the cable core crimping connection assembly is in an unloaded state, so as to ensure the smooth insertion of the cable core;

[0036] 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 they are both stably thread - connected to the inside of the external - thread sealing cylinder 38. After the external - thread sealing cylinder 38 wraps the outside of the transmission connection base block 35, the overall sealing performance of the inside of the cable core self - positioning plug - in joint 12 is ensured. At the same time, a sealing ring is arranged on the outside of the anti - detachment limit rotating ring 22 to keep full contact between the anti - detachment limit rotating ring 22 and the anti - detachment limit rotating slide rails 23 after the external - thread sealing cylinder 38 descends, so as to seal the top of the cable core self - positioning plug - in joint 12.

[0037] As a preferred embodiment of the present invention, refer to Figure 9 、 Figure 5, the positioning pressure plate 26 is arranged in an inverted frustum structure. A plurality of fixing rods 39 are annularly and equally spaced on the outer circumferential wall of the positioning pressure 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 circumferential wall of the external thread sealing cylinder 38. A T-shaped chute 42 is 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 along the inside of the T-shaped chute 42. At the same time, a set of vertical limiting telescopic rods 41 are connected to the fixing rod 39. A telescopic hole is provided at the top inner wall of the corresponding sealing positioning screw rod 48 of the limiting telescopic rod 41. An anti-disengagement 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 ascending and descending inside the telescopic hole, keeping the rotational positioning of the cable core input channel 16 and controlling stable ascending and descending;

[0038] Specifically, since the positioning pressure plate 26 is arranged in an inverted frustum structure, in order to keep the bottom of the cable core perforation 18 in full contact with the cable core insertion hole 19 and control the smooth transmission of the cable core, the top of the sealing positioning screw rod 48 is set as an arc groove structure that cooperates with the bottom of the positioning pressure plate 26. When controlling the positioning pressure plate 26 to move towards the sealing positioning screw rod 48, the bottom of the positioning pressure plate 26 is in full contact with the top of the sealing positioning screw rod 48.

[0039] As a preferred embodiment of the present invention, refer to Figures 1-5 , Figure 7 , Figure 8 , the cable core crimping connection assembly includes external cable core transmission bodies 32 fixedly installed at the bottom of the sealing positioning screw rod 48 and distributed annularly and equally spaced. The number of the external cable core transmission bodies 32 is the same as that of the cable core insertion and positioning channels 20, and through holes radially distributed are provided inside them. The end of the through hole facing the center of the sealing positioning screw rod 48 communicates with the cable core insertion and positioning channel 20 upward. The cable core extending into the cable core insertion and positioning channel 20 extends to the inner end of the through hole. A downward cable core connection port 21 is provided at the inner end of the through hole. The cable core extends to the cable core connection port 21. At the same time, a set 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 in the middle of the top of the swing connection terminal 29, and a side transmission end 31 is installed in the middle of the side wall. An electrical connection is made between the inner ends of the fixed crimping end 30 and the side transmission end 31. When the U-shaped swing pressure rod 27 swings under the pressure of the positioning pressure plate 26, it controls the swing connection terminal 29 to swing obliquely upward, thereby controlling the fixed crimping end 30 to squeeze towards the inside of the cable core connection port 21 to crimp and connect the cable core extending to the cable core connection port 21. At the same time, as the external thread sealing cylinder 38 is continuously sleeved onto the transmission connection base block 35, the contact 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;

[0040] It should be noted that at the initial stage of connecting the transmission connection base block 35 to the bottom of the external thread sealing cylinder 38, manually control the movement of the transmission connection base block 35 to the lower side of the sealing positioning screw 48. At this time, the transmission connection terminal 36 passes over the initial position of the side transmission end 31 in terms of height. As the U-shaped swing pressure lever 27 swings under pressure, while controlling the crimping of the constant pressure connection end 30 and the cable core connection port 21, the side transmission end 31 also gradually contacts the transmission connection terminal 36, thus realizing an automatic contact connection mode;

[0041] Specifically, the connection between the through hole and the cable core insertion and positioning channel 20 is set as an arc-shaped smooth connection to ensure the smooth movement of the cable core;

[0042] Specifically, in order to ensure that the transmission connection terminal 36 on the transmission connection base block 35 can accurately contact and connect with the side transmission end 31, a set 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. A cable core transmission connection positioning hole 33 is opened in the middle of the bottom of the corresponding sealing positioning screw 48 of the cable core transmission connection positioning block 34. When the transmission connection base block 35 moves towards the bottom of the sealing positioning screw 48, pre-positioning is carried out through the insertion of the cable core transmission connection positioning block 34 and the transmission connection base block 35, that is, to ensure the accuracy of subsequent connections.

[0043] As a preferred embodiment of the present invention, refer to Figure 7 , a set of elastic anti-back components 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 under a certain tensile force. The elastic anti-back components include buffer grooves 46 symmetrically opened on the upper and lower sides of the through hole. Inside the buffer grooves 46, there are vertically moving back-movement limiting blocks 44 elastically connected by springs 47. The back-movement limiting blocks 44 are set in a similar right-angled trapezoid structure. Slide bars 45 are installed on both sides of the back-movement limiting blocks 44 placed inside the buffer grooves 46, and the slide bars 45 move up and down along the inner walls of the buffer grooves 46. The inclined surfaces of the back-movement limiting blocks 44 are distributed towards the axis of the through hole. The cable core entering along the through hole can smoothly pass through the back-movement limiting blocks 44 on both sides and enter the cable core connection port 21. When subjected to a back-movement tensile force, at this time, the back-movement limiting blocks 44 will generate a certain resistance to it.

[0044] The working principle of the present invention is as follows: At the idle position of the device, all the above-mentioned driving components, which refer to power components, electrical components, and the adapted power supply, are connected by wires, and the electrical connection is completed in the order of the working sequence among the electrical components. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and will not explain the electrical control. When connecting the photovoltaic power cable 10, select a connection structure with the number of holes in the core insertion and positioning channel 20 that is the same as or greater than the number of cores inside the photovoltaic power cable 10, and then perform the connection and installation. Initially, strip the end of the photovoltaic power cable 10 to expose the cores, and then insert them downward along the core input hole 15 inside the stepped cylinder 43, successively passing through the core input channel 16, the core output port 17, the core through hole 18, the core insertion hole 19, and the core insertion and positioning channel 20 and extending into the through hole. Then, the return limit block 44 is used to block its return until the end moves to the core connection port 21. Then, hold the transmission connection base block 35 and move it to the bottom of the sealing positioning screw 48, apply a moving top force to the sealing positioning screw 48, and then rotate the external thread sealing cylinder 38 to threadedly connect with the sealing positioning screw 48 and the transmission connection base block 35 at the same time. At this time, the external thread sealing cylinder 38 continuously moves downward. Then, under the rotational limit of the T-shaped slider 40 and the limit telescopic rod 41, control the positioning pressure plate 26 to descend, and then push the U-shaped swing pressure rod 27 to swing. The bottom of the U-shaped swing pressure rod 27 swings obliquely upward. At this time, control the fixed pressure connection end 30 to be crimped and connected to the end of the core inside the core connection port 21, and at the same time control the side transmission end 31 to be in contact connection with the transmission connection terminal 36 on the side wall of the transmission connection base block 35, so as to realize the automatic, rapid and stable connection of the photovoltaic power cable 10. At the same time, utilize the threaded connection between the external thread sealing cylinder 38 and the transmission connection base block 35 and the sealing positioning screw 48, and the rotational fit between the anti-disengagement limit rotating ring 22 and the anti-disengagement limit rotating slide rail 23 to maintain the seal after the connection of the photovoltaic power cable 10.

[0045] The above describes the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A rapid waterproof sealing connection structure for photovoltaic power cables, characterized in that, It includes a photovoltaic power cable (10), a core input positioning joint (11), a core self-positioning plug-in joint (12), and a threaded joint (13); after the end of the photovoltaic power cable (10) is stripped, the core is inserted and input into the core input positioning joint (11) for pre-positioning. One end of the core input positioning joint (11) is rotatably arranged in a non-detachable manner on one side inside the core self-positioning plug-in joint (12). The other end of the core self-positioning plug-in joint (12) is threadedly sleeved on the end of the threaded joint (13). The core input positioning joint (11) includes a stepped cylinder (43) with an open end. A plurality of axially penetrating core input channels (16) are annularly and equally spaced inside the stepped cylinder (43); The core self-positioning plug-in joint (12) includes an externally threaded sealing cylinder (38) with open ends at both ends. A set of core self-positioning crimping mechanisms is arranged in a threaded lifting manner inside the externally threaded sealing cylinder (38). A core plug-in positioning channel (20) corresponding to the core input channel (16) is provided in the core self-positioning crimping mechanism. The core self-positioning crimping mechanism includes a positioning pressing plate (26) rotatably and limitedly arranged on the externally threaded sealing cylinder (38) and lifted and positioned along with the externally threaded sealing cylinder (38). A set of sealing positioning screws (48) is connected in a lifting and limiting manner directly below the positioning pressing plate (26). A plurality of sets of U-shaped swing pressing rods (27) with the same number as the core plug-in positioning channels (20) are annularly and equally spaced on the sealing positioning screws (48). The top inclined surface of the U-shaped swing pressing rod (27) contacts the bottom inclined surface of the positioning pressing plate (26). A core crimping connection component that swings and contacts the bottom end of the U-shaped swing pressing rod (27) is arranged at the end of the inner end of the core plug-in positioning channel (20); The threaded joint (13) includes an inner threaded rod (37) threadedly connected to the inside of the bottom end of the externally threaded sealing cylinder (38). A transmission connection base block (35) is installed in the middle of the top of the inner threaded rod (37). A plurality of sets of transmission connection terminals (36) with the same number as the core plug-in positioning channels (20) and swingingly contacting the core crimping connection components are annularly and equally spaced on the circumferential side wall of the transmission connection base block (35). One end of the inner threaded rod (37) far from the core self-positioning plug-in joint (12) is connected to an equipment connector; The cable core crimping connection assembly includes externally placed cable core transmission bodies (32) fixedly installed at the bottom of the sealed positioning screw rod (48) and distributed at equal intervals in a ring shape. The number of the externally placed cable core transmission bodies (32) is the same as that of the cable core insertion positioning channels (20), and through holes are radially formed inside them. The end of the through hole facing the center of the sealed positioning screw rod (48) communicates upward with the cable core insertion positioning channel (20). The cable core extending into the cable core insertion positioning channel (20) extends to the inner end of the through hole, and a downward cable core connection port (21) is formed at the inner end of the through hole. A group of swing connection terminals (29) are installed at the bottom end of the U-shaped swing pressure lever (27). A fixed pressure connection end (30) is installed in the middle of the top of the swing connection terminal (29), and a side transmission end (31) is installed in the middle of the side wall. An electrical connection is provided between the inner ends of the fixed pressure connection end (30) and 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). A cable core transmission connection positioning hole (33) is formed in the middle of the bottom of the corresponding sealed positioning screw rod (48) of the cable core transmission connection positioning block (34). A group of elastic anti-backflow members are arranged inside the through hole. The elastic anti-backflow members include buffer grooves (46) symmetrically formed on the upper and lower sides of the through hole. A return limit block (44) that moves vertically is elastically connected inside the buffer groove (46) through a spring (47). The return limit block (44) is configured in a shape similar to a right trapezoid. Slide bars (45) are installed on both sides of the return limit block (44) placed 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 towards the axis of the through hole.

2. The quick waterproof and sealed connection structure of a photovoltaic power cable according to claim 1, wherein, The lower side inside the stepped cylinder (43) is of a solid structure. The top of the cable core input channel (16) communicates with a cable core input hole (15) formed on the upper side inside the stepped cylinder (43), and the bottom communicates with a cable core output port (17) formed on the lower side wall of the stepped cylinder (43). A through cable core perforation (18) is formed on the corresponding positioning pressure plate (26) below the cable core output port (17). A cable core insertion hole (19) is formed on the top of the corresponding sealed positioning screw rod (48) below the cable core perforation (18). The bottom end of the cable core insertion hole (19) communicates with the top of the cable core insertion positioning channel (20).

3. The rapid waterproof and sealed connection structure of the photovoltaic power cable according to claim 2, wherein, A circle of anti-disengagement limit rotating ring (22) is installed at the bottom end of the stepped cylinder (43). The vertical cross-section of the anti-disengagement limit rotating ring (22) is configured in an obtuse triangle structure. A circle of anti-disengagement limit rotating slide rails (23) rotatably connected to the anti-disengagement limit rotating ring (22) is provided at the inner top of the corresponding external thread sealing cylinder (38). The anti-disengagement limit rotating ring (22) is rotatably arranged along the inside of the anti-disengagement limit rotating slide rail (23).

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

5. The photovoltaic power cable rapid waterproof and sealing connection structure according to claim 4, characterized in that, A lever swinging groove (28) is formed in the corresponding sealing positioning screw rod (48) of the U-shaped swinging lever (27). The middle part of the U-shaped swinging lever (27) is rotationally connected to the inner wall of the U-shaped swinging lever (27) through a rotating shaft. A hairspring is sleeved at the end of the rotating shaft. When the hairspring is in a free state, it controls the bottom end of the U-shaped swinging lever (27) and the cable core crimping connection assembly to be in a state of being far apart.

6. The rapid waterproof and sealed connection structure for photovoltaic power cables according to claim 5, characterized in that, The positioning pressing plate (26) is arranged in an inverted frustum shape. A plurality of fixing rods (39) are annularly and equally spaced on the circumferential outer wall of the positioning pressing plate (26). A T-shaped slider (40) is installed at the end of the fixing rod (39). A non-tooth groove area is arranged on the upper side of the inner wall of the outer thread sealing cylinder (38). A circle of T-shaped sliding grooves (42) is formed in the non-tooth groove area on the inner wall of the outer 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 set of vertical limiting telescopic rods (41) is connected to the fixing rod (39). A telescopic hole is formed in the top inner wall of the sealing positioning screw rod (48) corresponding to the limiting telescopic rod (41). An anti-disengagement cap is arranged at the end of the limiting telescopic rod (41) placed inside the telescopic hole.

7. The rapid waterproof and sealed connection structure of a photovoltaic power cable according to claim 6, characterized in that, The top of the sealing positioning screw rod (48) is arranged in an arc groove structure that cooperates with the bottom of the positioning pressing plate (26).

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