Linear low-voltage fully-sealed cable plug-in device

Abstract

The utility model relates to 10 / 0.4kV distribution transformer, low voltage distribution equipment technical field especially, a kind of low-voltage fully-enclosed cable plug device, including plug assembly, its one end is provided with baffle along ring direction, the baffle is with the direction of the plug assembly axial center is shielded;And socket assembly, opposite end of the plug assembly is opened with water collecting groove along ring direction, the water collecting groove is communicated with drain hole;The baffle is suitable for inserting the water collecting groove;The utility model is set by socket assembly, plug assembly and cable glue filling component structure, the requirement of high protection of low-voltage cable connection is realized. Through the linear connection of incoming and outgoing line low-voltage cable and conductive plug, the device can carry greater current, it is convenient for insulation layer processing, and thickness is more uniform, more conducive to increasing the cross-sectional area of conducting part;Through the cooperation setting of baffle and water collecting groove, the risk of moisture entering the connecting portion when the plug device is pulled by external force as a whole is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of 10 / 0.4kV distribution transformers and low-voltage power distribution equipment, and in particular to a linear low-voltage fully sealed cable plugging and unplugging device. Background Technology

[0002] With the continuous development of power distribution networks, traditional power distribution equipment can no longer meet users' needs in many aspects. Especially with rising global temperatures and the impact of extreme weather events such as typhoons, rainstorms, floods, and heavy rainfall, power distribution facilities in urban underground stations and low-lying areas cannot operate in flooded environments, causing significant inconvenience to industrial production and residents' lives. On the one hand, flooding leads to damage and malfunctions in power distribution equipment; on the other hand, flooded equipment may also threaten the personal safety of people near the equipment.

[0003] The junctions between traditional power distribution equipment and power lines are often high-risk points for equipment failure. Frequently, due to manufacturing defects and inadequate insulation, exposed conductors come into contact with moisture in the air, causing discharges that lead to equipment malfunctions and potential hazards. Furthermore, it is impossible to guarantee the safe long-term operation of equipment in harsh environments such as polluted conditions or water immersion.

[0004] Meanwhile, in order to increase the current carrying capacity of low-voltage cables and increase the cross-sectional area of ​​conductive components, the cable plugging and unplugging device of this utility model is designed with a linear connection. The linear connection of the cable plugging and unplugging device results in greater tensile force at the plugging and unplugging point, which can easily create gaps and lead to water leakage. Utility Model Content

[0005] In view of the problem of inadequate insulation protection at the junction of power distribution equipment and power distribution lines in the above or existing technologies, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a linear low-voltage fully sealed cable plugging and unplugging device.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a linear low-voltage fully sealed cable plugging and unplugging device, including a plug assembly, one end of which is provided with a retaining edge along the circumferential direction, the retaining edge being arranged in a direction that covers the axis of the plug assembly; and a socket assembly, the opposite end of which is provided with a water collection groove along the circumferential direction, the water collection groove communicating with a drain hole, at least one side wall of the water collection groove being connected to the bottom surface of the water collection groove at an acute angle; the retaining edge is adapted to be inserted into the water collection groove.

[0008] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, wherein:

[0009] The inner sidewall of the baffle is provided with continuous guide ribs, and the cross-sectional shape of the guide ribs is suitable for guiding water to fall into the water collection tank.

[0010] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the outer wall of the retaining edge is configured as a guide surface, and the guide surface gradually converges towards the axis of the retaining edge from the connection point with the plug assembly to the end of the guide surface.

[0011] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the water collection tank opening is arranged opposite to the baffle, and the size of the water collection tank opening is smaller than its bottom surface size.

[0012] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, wherein: the plug assembly is provided with a linear conductive plug, and one end of the conductive plug is coaxially connected to an inlet / outlet low-voltage cable;

[0013] The socket assembly is equipped with a linear conductive socket, one end of which is connected to a cable and the other end is coaxially connected to the conductive plug.

[0014] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the plug assembly further includes a plug housing, and the retaining flange is disposed at one end of the plug housing and extends forward along the axial direction of the plug housing.

[0015] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the socket assembly further includes a socket housing, and the water collection tank is formed on the opposite end face of the socket housing and the plug housing.

[0016] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, it further includes a cable potting assembly, which is sleeved on the plug assembly and the insertion point of the incoming and outgoing low-voltage cables, and is coaxially arranged with both.

[0017] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the cable potting assembly includes a waterproof junction box, which is generally configured as a round tube with a glue injection port on its side wall.

[0018] As a preferred embodiment of the linear low-voltage fully sealed cable plugging and unplugging device of this utility model, the waterproof junction box has an overall unequal diameter structure, with the larger inner diameter section adapted to the plug assembly and the smaller inner diameter section adapted to the incoming and outgoing low-voltage cables.

[0019] The beneficial effects of this linear low-voltage fully sealed cable plug-in device are as follows: This invention achieves high protection for low-voltage cable connections through the design of the socket assembly, plug assembly, and cable potting assembly. It eliminates the problem of insulation aging between incoming and outgoing cables and power distribution equipment caused by water immersion or contamination in the external environment of the power distribution room, and also avoids equipment oxidation and corrosion caused by salt spray and humidity. Because this fully sealed low-voltage cable plug-in device achieves a fully sealed connection, maintenance-free connection is achieved. It can be flexibly configured according to the rated current of the power distribution equipment, is resistant to high temperatures and aging, is easy to install, and has a long service life. It prevents external liquids or gases from entering the power distribution equipment, solving the problem of power outages caused by water immersion in underground power distribution rooms during urban flooding.

[0020] By using a coaxial linear connection between the incoming and outgoing low-voltage cables and the conductive plug, the device can carry a larger current, facilitates the processing of the insulation layer, and results in a more uniform thickness, which is more conducive to increasing the cross-sectional area of ​​the conductive components.

[0021] The combination of the retaining edge and the water collection tank avoids the risk of water entering the connection point when the entire plug-in device is pulled by external force. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of a low-voltage, fully sealed cable plug-in device.

[0024] Figure 2 This is a schematic diagram of a low-voltage, fully sealed cable plugging and unplugging device.

[0025] Figure 3 This is an exploded view of a low-voltage, fully sealed cable plugging / unplugging device.

[0026] Figure 4 This is a structural diagram of a socket assembly.

[0027] Figure 5 This is a cross-sectional view of the socket assembly.

[0028] Figure 6 This is a cross-sectional view of the plug assembly.

[0029] Figure 7 This is a schematic diagram of a cable potting assembly. Detailed Implementation

[0030] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0032] Reference Figure 1 The first embodiment of this utility model provides a linear low-voltage fully sealed cable plugging and unplugging device, which is suitable for connecting low-voltage fully sealed cables for the low-voltage side output of distribution transformers and the input and output of low-voltage distribution cabinets.

[0033] Specifically, it includes a plug assembly 100, one end of which is provided with a retaining edge 105 in a circumferential direction. The retaining edge 105 is arranged in the direction of blocking the axis of the plug assembly 100. When water falls onto the retaining edge 105, it can slide off along the outer wall of the retaining edge 105.

[0034] The socket assembly 200 has a circumferentially circumferentially formed water collection groove 203 at its opposite end to the plug assembly 100. The water collection groove 203 is connected to a drain hole 203a. During installation, the drain hole 203a is located at the bottom, and the retaining edge 105 is adapted to be inserted into the water collection groove 203. When a gap is formed between the plug assembly 100 and the socket assembly 200 due to external force, water that slides down along the retaining edge 105 falls into the water collection groove 203. The water in the water collection groove 203 flows out through the drain hole 203a, preventing water from entering the device.

[0035] Furthermore, at least one side wall of the water collection tank 203 is connected to the bottom surface of the water collection tank 203 at an acute angle, so that the inner side of the water collection tank 203 is concave than its opening, so as to prevent water from flowing out of the opening of the water collection tank 203.

[0036] Reference Figure 1 The first embodiment of this utility model differs from the previous embodiment in that the inner sidewall of the baffle 105 is provided with continuous guide ribs 105a, and the cross-sectional shape of the guide ribs 105a is set with a larger top and a smaller bottom to guide water to fall into the water collection tank 203.

[0037] Specifically, the guide rib 105a can be set as a semi-circle, an inverted triangle, or an inverted trapezoid to prevent water from flowing back into the plug assembly 100 along the inner surface of the guide rib 105a after it reaches its end.

[0038] The outer wall of the flange 105 is configured as a guide surface 105b. The guide surface 105b gradually converges towards the axis of the flange 105 from the connection point with the plug assembly 100 to the end of the guide surface 105b, so as to provide moisture on the guide surface 105b to flow downward.

[0039] The opening of the water collection tank 203 is positioned opposite to the baffle 105 so that the baffle 105 can be inserted into the water collection tank 203.

[0040] Preferably, the opening size of the water collection tank 203 is smaller than its bottom size, so that water enters the water collection tank 203 and collects inside the water collection tank 203.

[0041] Reference Figure 2 and Figure 3 In the second embodiment of this utility model, unlike the previous embodiment, one end of the socket assembly 200 is sealed and plugged into the plug assembly 100, and the other end of the plug assembly 100 is plugged into the low-voltage cable L. Specifically, the socket assembly 200 can be installed on the low-voltage side cable inlet / outlet mounting plate m of the distribution transformer or the low-voltage distribution cabinet inlet / outlet mounting plate m, replacing the traditional low-voltage outlet sleeve.

[0042] Furthermore, one end of the socket assembly 200 is provided with a socket interlocking structure 202, which includes ribs and grooves stacked in the circumferential direction.

[0043] Furthermore, the plug assembly 100 and the socket interlocking structure 202 are provided with a plug interlocking structure 101 at their opposite ends. The plug interlocking structure 101 includes grooves and ribs stacked in a circumferential direction. The other end of the plug assembly 100 is connected to an incoming / outgoing low-voltage cable L. When the plug assembly 100 is plugged into the socket assembly 200, the plug assembly 100 and the conductive parts and the incoming / outgoing low-voltage cable L in the socket assembly 200 are coaxially and linearly connected.

[0044] Reference Figure 4 , 5 The third embodiment of this utility model differs from the previous embodiment in that the socket interlocking structure 202 includes a socket housing 201. A circumferential rib 202c is provided along the upper edge of the socket housing 201. A socket insulating sleeve 202a is coaxially disposed within the rib 202c, penetrating and installed inside the socket housing 201. A conductive socket 202b is coaxially installed within the socket insulating sleeve 202a. The socket insulating sleeve 202a and the conductive socket 202b are fixedly connected. The conductive socket 202b is linearly arranged, and one end of it is provided with a conductive plug slot 202d, which is adapted to the conductive plug 101a. A plug insulating sleeve slot 202e is formed between the socket insulating sleeve 202a and the rib 202c, and the plug insulating sleeve slot 202e is adapted to the plug insulating sleeve 101a.

[0045] A sealing groove is provided on the adjacent surface of the socket housing 201 and the incoming / outgoing line mounting plate m. A sealing ring 500 is installed in the sealing groove. The sealing ring 500 is an O-ring. The socket assembly 200 is installed on the low-voltage side incoming / outgoing line mounting plate m of the distribution transformer or the low-voltage distribution cabinet by fastening screws, so as to achieve a sealed connection and waterproof effect between the socket assembly 200 and the incoming / outgoing line mounting plate m.

[0046] Furthermore, refer to Figure 6 The plug assembly 100 has a plug interlocking structure 101 at one end and is adapted to be connected to the incoming / outgoing low-voltage cable L at the other end.

[0047] The plug-to-plug structure 101 includes a plug housing 103. A plug insulating sleeve 102 is coaxially installed inside the plug housing 103. The plug insulating sleeve 102 passes through the plug housing 103. A conductive plug 101a is coaxially installed inside the plug insulating sleeve 102. The conductive plug 101a is straight and is fixedly connected to the plug insulating sleeve 102 with both ends protruding from both ends. One end of the conductive plug 101a is provided with a cable connection groove 104, which is compatible with the incoming and outgoing low-voltage cables L.

[0048] The plug insulating sleeve 102 has a plug insulating sleeve end wall 101b at one end inside the plug housing 103. A socket insulating sleeve slot 101e is formed inside the plug insulating sleeve end wall 101b, and the socket insulating sleeve slot 101e is adapted to the socket insulating sleeve 202a.

[0049] A raised rib slot 109 is formed between the inner wall 101c of the plug insulating sleeve 102 and the end wall 101b of the plug insulating sleeve, and the raised rib slot 109 is adapted to the raised rib 202c.

[0050] Understandably, the two ends of the conductive plug 101a protrude from the plug insulating sleeve 102 to enable circuit conduction.

[0051] The plug assembly 100 can be interlocked with the socket assembly 200. Specifically, the socket insulating sleeve 202a and the conductive socket 202b of the socket assembly 200 are simultaneously inserted into the socket insulating sleeve slot 101e of the plug assembly 100, and the protruding rib 202c is inserted into the protruding rib slot 109 of the plug assembly 100; the plug insulating sleeve end wall 101b of the plug assembly 100 is inserted into the plug insulating sleeve slot 202e of the socket assembly 200, and the conductive plug 101a of the plug assembly 100 is inserted into the conductive plug slot 202d of the socket assembly 200; the aforementioned multiple interlocking structure forms a sealed and stable connection between the plug assembly 100 and the socket assembly 200.

[0052] It should be noted that a sealing ring 500 is provided at the bottom of the rib slot 109. After the rib 202c is inserted, it abuts against the rib 202c to form a sealed connection at this location.

[0053] By setting up an interlocking mechanism between the socket assembly 200 and the plug assembly 100, a sealed conductive circuit is formed between the socket assembly 200 and the plug assembly 100.

[0054] Reference Figure 1 , 3 7. In the fourth embodiment of this utility model, unlike the previous embodiment, the plug assembly 100 forms a sealed connection with the incoming and outgoing low-voltage cable L through the fully sealed cable potting assembly 300.

[0055] Specifically, a cable potting assembly 300 is provided on the outside of the plug assembly 100 and the low-voltage cable L. A sealing filler is added inside the cable potting assembly 300. The sealing filler is preferably an insulating and waterproof sealant. After the insulating and waterproof sealant solidifies, it seals and wraps the plug assembly 100 and the low-voltage cable L, thereby improving the connection strength between the two.

[0056] The cable potting assembly 300 includes a waterproof junction box 301, and the side wall of the waterproof junction box 301 is provided with a potting port 302.

[0057] The waterproof junction box 301 is generally designed as a cylindrical tube with an overall unequal diameter structure. Specifically, the waterproof junction box 301 includes, in sequence, an interconnected inlet section 303, a large-diameter section 304 (i.e., a section with a larger inner diameter), a small-diameter section 305 (i.e., a section with a smaller inner diameter), and the inlet section 303.

[0058] The large-diameter section 304 is adapted to the plug insulating sleeve 102 of the plug assembly 100, and the small-diameter section 305 is adapted to the incoming and outgoing low-voltage cables L, so that after the waterproof junction box 301 is filled with glue, the glue thickness is uniform, which saves glue and improves the sealing performance.

[0059] To facilitate understanding of this device, the manufacturing process is briefly described below:

[0060] The first step is to prefabricate the mold for the socket insulating sleeve 202a, embed the conductive socket 202b in the mold cavity, and fix the socket insulating sleeve 202a onto the conductive socket 202b by injection molding to form a sealed connection; then insert the socket insulating sleeve 202a into the socket housing 201, and fix the two and form a sealed connection by interference fit between the socket insulating sleeve 202a and the socket housing 201.

[0061] Specifically, the sealing connection between the socket insulating sleeve 202a and the conductive socket 202b is as follows: the conductive socket 202b, which is pre-placed in the mold cavity, is used as an embedded part and cast with epoxy resin to form an integrated structure. The socket insulating sleeve 202a covers the outer periphery of the conductive socket 202b. The socket insulating sleeve 202a prevents the conductive socket 202b from conducting with the socket housing 201. The integrated structure of the socket insulating sleeve 202a and the conductive socket 202b is installed in the socket housing 201. The socket insulating sleeve 202a and the socket housing 201 are interference fit. Then, the watch strap contact finger (not shown in the figure) is installed in the conductive plug slot 202d to complete the assembly of the socket assembly 200.

[0062] The second step includes prefabricating a plug insulating sleeve 102 mold, pre-embedding the conductive plug 101a in the mold cavity, and fixing the plug insulating sleeve 102 onto the conductive plug 101a by injection molding to form a sealed connection; then inserting the plug insulating sleeve 102 into the plug housing 103, and fixing the two and forming a sealed connection by interference fit between the plug insulating sleeve 102 and the plug housing 103.

[0063] Specifically, the sealing connection between the insulating sleeve 202 and the conductive plug 101a is as follows: the conductive plug 101a and the plug insulating sleeve 102 are inserted together into the fully sealed plug housing 103, and the watch strap contact finger (not shown in the figure) is installed in the cable connection groove 104. The sealing ring 500 is installed in the rib slot 109 to complete the assembly of the fully sealed plug assembly 100.

[0064] Finally, insert the incoming / outgoing low-voltage cable L into the conductive plug 101a, then attach the waterproof junction box 301 to the plug insulating sleeve 102 and the incoming / outgoing low-voltage cable L, and inject insulating and waterproof sealant. After the insulating and waterproof sealant solidifies, the sealed connection between the incoming / outgoing low-voltage cable L and the plug insulating sleeve 102 is completed.

[0065] The specific operation process is as follows: Strip the outer insulation layer of the incoming / outgoing low-voltage cable L to the relevant standard length to expose the copper core. Insert the waterproof cable junction box 301 through the end of the incoming / outgoing low-voltage cable L. Insert the incoming / outgoing low-voltage cable L into the conductive plug 101a of the plug assembly 100. Use hydraulic clamps to firmly crimp the copper core of the cable to the conductive plug 101a, and seal the crimped joint with tape. Adjust the waterproof cable junction box 301 to a suitable position, and tightly wrap the connection points between the guide section 303 and the incoming / outgoing low-voltage cable L, and between the guide section 303 and the plug insulating sleeve 102, with electrical tape. Pour insulating and waterproof sealant into the injection port 302 of the waterproof cable junction box 301. After filling, lay it flat and let it stand for 30 minutes until the insulating and waterproof sealant is completely cured.

[0066] The above structure enables a straight, fully sealed plug-in connection for low-voltage cables.

[0067] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A linear low-voltage fully sealed cable plugging and unplugging device, characterized in that: include, A plug assembly (100) has a circumferentially circumferentially circumferentially provided edge (105) at one end, the edge (105) being arranged in a direction that obstructs the axis of the plug assembly (100); and, A socket assembly (200) has a water collection groove (203) circumferentially formed at its opposite end to the plug assembly (100). The water collection groove (203) is connected to a drain hole (203a). At least one side wall of the water collection groove (203) is connected to the bottom surface of the water collection groove (203) at an acute angle. The retaining edge (105) is adapted to be inserted into the water collection tank (203).

2. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 1, characterized in that: The inner sidewall of the retaining edge (105) is provided with continuous guide ribs (105a) in the circumferential direction, and the cross-sectional shape of the guide ribs (105a) is set with the upper part larger and the lower part smaller.

3. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 1 or 2, characterized in that: The outer wall of the retaining edge (105) is configured as a guide surface (105b), which gradually converges towards the axis of the retaining edge (105) from the connection point with the plug assembly (100) to the end of the guide surface (105b).

4. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 3, characterized in that: The opening of the water collection trough (203) is opposite to the baffle (105), and the opening size of the water collection trough (203) is smaller than its bottom size.

5. The linear low-voltage fully sealed cable plugging and unplugging device as described in any one of claims 1, 2, or 4, characterized in that: The plug assembly (100) is provided with a straight conductive plug (101a) inside, and one end of the conductive plug (101a) is coaxially connected to an inlet / outlet low-voltage cable (L); The socket assembly (200) is provided with a linear conductive socket (202b) inside. One end of the conductive socket (202b) is connected to the cable, and the other end is coaxially connected to the conductive plug (101a).

6. The linear low-voltage fully sealed cable plugging and unplugging device as described in any one of claims 1, 2, or 4, characterized in that: The plug assembly (100) further includes a plug housing (103), wherein the retaining flange (105) is disposed at one end of the plug housing (103) and extends forward along the axial direction of the plug housing (103).

7. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 6, characterized in that: The socket assembly (200) also includes a socket housing (201), and the water collection tank (203) is formed on the opposite end face of the socket housing (201) and the plug housing (103).

8. The linear low-voltage fully sealed cable plugging and unplugging device as described in any one of claims 1, 2, 4, and 7, characterized in that: It also includes a cable potting assembly (300), which is sleeved on the plug assembly (100) and the insertion point of the incoming and outgoing low-voltage cable (L), and is coaxial with both.

9. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 8, characterized in that: The cable potting assembly (300) includes a waterproof junction box (301), which is generally cylindrical and has a potting port (302) on its side wall.

10. The linear low-voltage fully sealed cable plugging and unplugging device as described in claim 9, characterized in that: The waterproof junction box (301) has an overall unequal diameter structure, with the larger inner diameter section adapted to the plug assembly (100) and the smaller inner diameter section adapted to the incoming and outgoing low-voltage cables (L).

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