A multi-purpose wind energy safety chain cable waterproof connector

Abstract

The utility model discloses a multi-purpose wind energy safety chain cable waterproof connector; the connector for installation and use includes a plug-in core and an outer shell, and the outer shell is fixedly connected to the plug-in core; one side of the plug-in core is provided with a plurality of conductor pins arranged in an array, and the side is provided with a conductor screw crimping hole matching the pins; the conductor pins are used to connect a tower cabinet; the outer shell is also provided with a fixing bolt for fixing; the plug-in core is also provided with a hollow reinforcing column for inserting a cable center reinforcing load-bearing unit, and the side of the plug-in core is also provided with a cable center reinforcing unit screw hole connected to the hollow reinforcing column; the connector provided by the present application can effectively connect two cables of different structures. At the same time, the connector takes into account the safety of waterproofing and corrosion resistance, and is internally provided with a hollow reinforcing column for connecting the reinforcing unit, so that the load-bearing unit can play an effective role and improve the service life of the cable.

Description

Technical Field

[0001] The utility model relates to the field of power transmission cables, in particular to a multi-purpose wind energy safety chain cable waterproof connector. Background Art

[0002] Torsion-resistant and cold-resistant safety chain cables are used in wind energy safety chain systems to connect control cabinets and tower base cabinets. At present, there are two structural designs for wind energy safety chain cables, one is copper wire stranded conductor + polyvinyl chloride insulation + copper wire braiding + polyvinyl chloride sheath structure. The other is the structure with patent number ZL 202221246212.4, Kevlar-wrapped stainless steel wire + spring-shaped copper wire conductor + isolation cotton paper film + torsion-resistant and cold-resistant -40℃ salt spray resistant EPDM rubber or torsion-resistant and cold-resistant -55℃ salt spray resistant silicone rubber + high and low temperature resistant and torsion-resistant silicone rubber self-adhesive insulating tape + cable center reinforced load-bearing unit + torsion-resistant and cold-resistant -40℃ chlorinated polyethylene rubber or torsion-resistant and cold-resistant -55℃ silicone rubber torsion-resistant inner protective layer + copper wire braiding + torsion-resistant and cold-resistant -40℃ chlorinated polyethylene rubber or torsion-resistant and cold-resistant -55℃ silicone rubber torsion-resistant outer protective layer. The existing connectors have the following problems:

[0003] 1. Currently, there is no connector that is suitable for connecting two wind energy safety chain cable structures at the same time.

[0004] 2. The wind energy safety chain connectors currently on the market do not have a cable center reinforcement bearing unit to fix the connection. When the safety chain cable is subjected to the cable's own weight and torsional force, the cable center reinforcement bearing unit is not fixedly connected at both ends, resulting in the cable center reinforcement bearing unit failing to play its role as a bearing unit.

[0005] 3. The waterproof performance of the current waterproof connector cannot meet the high humidity, salt spray, high and low temperature difference working conditions requirements of the wind energy safety chain cable, and there are safety hazards.

[0006] 4. The current wind energy safety chain connector has no shielding and grounding function, posing a safety hazard. Utility Model Content

[0007] In order to adapt well to cables of different specifications and facilitate the connection of cables on the tower crane, the present application provides a multi-purpose wind energy safety chain cable waterproof connector.

[0008] The present application provides a multi-purpose wind energy safety chain cable waterproof connector, which adopts the following technical solution:

[0009] A multi-purpose wind energy safety chain cable waterproof connector, characterized in that: it comprises a plug core and a shell, the shell is fixedly connected to the plug core; one side of the plug core is arrayed with a plurality of conductor pins for inserting wire cores; the conductor pins are used to connect to a tower cabinet; a plurality of conductor screw crimping holes for fixing the wire core are opened on the side of the plug core; the shell is also provided with a fixing bolt;

[0010] The plug-in core body is also provided with a hollow reinforcement column for inserting the cabling center reinforcement bearing unit, and the side surface of the plug-in core body is also provided with a cabling center reinforcement unit screw hole connected to the hollow reinforcement column.

[0011] Furthermore, the shell is fixedly connected to a bottom plate, the bottom plate and the shell form a frame, and a wire entry hole is opened on the bottom plate.

[0012] Furthermore, a threaded sleeve is provided at the wire entry hole, a waterproof fastener is threadedly connected to the threaded sleeve, and a sealing ring for being sleeved on the cable is provided inside the waterproof fastener.

[0013] Furthermore, the sealing ring is composed of three layers: an inner sealing ring, a stroke vehicle expansion piece, and an outer sealing ring.

[0014] Furthermore, the inner sealing ring is made of high-elasticity and temperature-resistant silicone rubber of -55°C-200°C, the middle windshield expansion sheet layer is made of silicone rubber or nitrile rubber, and the outer sealing ring is made of high-elasticity and temperature-resistant silicone rubber of -55°C-200°C.

[0015] Furthermore, the waterproof fastener body is made of nickel-plated brass.

[0016] Furthermore, a shielding grounding fixing hole is provided on the shell.

[0017] Furthermore, a rubber sealing sleeve is provided on the outer wall of the shell.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. Compared with the prior art, the present application can be applied to two types of wind energy safety chain cable structure connections at the same time.

[0020] 2. Compared with the prior art, the center of this application is equipped with a cable center reinforcement unit fixing column, which can connect the cable center reinforcement bearing unit of the wind energy safety chain cable to play the role of its bearing unit, ensuring that the cable is continuously connected under its own weight and frequent torsion conditions to extend the service life of the cable. This connector is also suitable for other dynamic cable installation and connection with a reinforcement structure to effectively play the bearing role of the reinforcement structure.

[0021] 3. Compared with the existing technology, a shielding grounding fixing hole is added to improve the safety of cable installation and use, and a silicone rubber sealing sleeve is added to the male and female connectors, which is tightly fitted on the connection between the male connector and the female connector to improve the sealing performance and prevent salt spray, dust and water vapor from entering the connector, thereby improving the waterproof performance and ensuring that the waterproof performance is as high as IP68.

[0022] 4. Compared with the existing technology, the tower cabinet has a double-wall heat shrink tube with inner silicone rubber at the peeling end, and the waterproof fasteners are sealed inside, inside and outside to enhance the waterproof performance and prevent water vapor from entering the connector through the cable entry hole at the bottom of the shell, further ensuring the waterproof performance up to IP68.

[0023] 5. The tower cabinet end wiring harness installation equipment can be completed in advance before the wind energy safety chain cable is installed on the tower. When it is installed on the tower, the corresponding female connector can be directly plugged in to achieve quick installation, thereby improving the safety of the wind energy safety chain cable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the overall structural diagram of a multi-purpose wind energy safety chain cable waterproof connector of the present application;

[0025] Figure 2 yes Figure 1 A top view of the middle housing and the bottom plate;

[0026] Figure 3 yes Figure 1 A top view of the middle plug core;

[0027] Figure 4 yes Figure 1 Side view of the middle plug core (without cable connected);

[0028] Figure 5 yes Figure 1 Side view of the middle plug core (when the cable is connected);

[0029] Figure 6 yes Figure 1 Cross-sectional view of waterproof fasteners;

[0030] Figure 7 It is another cross-sectional view of the waterproof fastener.

[0031] Description of reference numerals:

[0032] 1. Shell; 11. Shielding grounding fixing hole; 12. Rubber sealing sleeve; 13. Fixing bolt; 2. Bottom plate; 21. Threaded sleeve; 22. Waterproof fastener; 221. Inner sealing ring; 222. Stroke vehicle expansion piece; 223. Outer sealing ring; 224. Main body; 225. Nut; 23. Wire entry hole; 3. Plug-in core; 31. Conductor pin; 32. Conductor screw crimping hole; 33. Conductor screw; 34. Hollow reinforcement column; 35. Cable center reinforcement unit screw hole; 36. Cable center reinforcement unit screw; 4. Cable; 41. Wire core 42. Cable center reinforcement load-bearing unit. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-7 This application is described in further detail.

[0034] The embodiment of the present application discloses a multi-purpose wind energy safety chain cable waterproof connector, which is a male connector, and a paired female connector is provided on the tower cabinet; the connector includes a shell 1, a bottom plate 2 and a plug-in core 3, and a fixing bolt 13 is provided on the shell 1; the fixing bolt 13 is used to fix the cable before it is put on the tower, and after the male connector and the female connector are plugged in, the fixing effect is enhanced to prevent loosening; the shell 1 and the bottom plate 2 are fixedly connected to form a frame, and a cable entry hole 23 is opened on the bottom plate 2; the four corners of the plug-in core 3 are provided with through holes, and the four paired corners of the shell 1 are provided with threaded holes, and the plug-in core 3 is fixedly connected to the shell 1 by bolts. The shell 1 is ADC12 aluminum alloy.

[0035] The plug-in core 3 is made of flame-retardant polycarbonate. Two columns and eight rows of conductor pins 31 are arranged on one side of the plug-in core 3 for inserting the core 41. The conductor pin 31 is a hollow structure made of copper alloy. The pin surface is silver-plated to prevent oxidation and increase the current carrying capacity. Numbers 1-18 are printed on the plug-in fixed core next to the conductor pin 31. When the core of the cable is inserted into the hollow of the conductor pin 31, the conductor pin 31 is connected to the core 41; at the same time, a plurality of conductor screw crimping holes 32 connected to the hollow of the conductor pin 31 are arranged on the side of the plug-in core 3; when the core 41 is inserted into the hollow of the conductor pin 31, the conductor screw 33 is screwed into the conductor screw crimping hole 32, and the core 41 is fixed in the hollow of the conductor pin 31 by the conductor screw 33.

[0036] In order to pair the cables with the cabling center reinforcement load-bearing unit, a hollow reinforcement column 34 made of 304 stainless steel is provided on the plug-in core 3 for the cabling center reinforcement load-bearing unit 42 to be inserted. Similarly, a cabling center reinforcement unit screw hole 35 connected to the hollow reinforcement column 34 is provided on the side of the plug-in core 3. The cabling center reinforcement unit 42 is fixed in the hollow reinforcement column 34 through the bolt through the cabling center reinforcement unit screw hole 35, so that the cabling center reinforcement load-bearing unit 42 can play its original function.

[0037] In order to ensure the waterproof performance of the connector, a threaded sleeve is provided at the wire inlet hole 23 of the base plate 2, and the threaded sleeve is connected to the waterproof fastener 22. The waterproof fastener 22 is sleeved on the cable. The main body 224 of the waterproof fastener 22 is made of nickel-plated brass. The sealing ring is composed of an inner sealing ring 221, a stroke type expansion piece 222, and an outer sealing ring. The three layers 223 are composed of an inner sealing ring 221, a stroke type expansion piece 222, and an outer sealing ring. The inner sealing ring adopts a high-elasticity and temperature-resistant -55℃-200℃ silicone rubber layer, the middle-layer windshield type expansion piece layer adopts silicone rubber or nitrile rubber, and the outer sealing ring adopts a high-elasticity and temperature-resistant -55℃-200℃ silicone rubber layer.

[0038] There is a gap between the expansion pieces in the non-tightened state. The actual size of the expansion pieces can be changed by tightening or loosening the threads according to the actual outer diameter of the cable. The three-layer seal ensures that external water vapor will not enter the connector through the cable through the bottom wire entry hole 23 of the shell 1 after tightening.

[0039] If the outer diameter of the cable is too small, by tightening the nut 225, the thread pushes the outer sealing ring 223, and the extrusion force is transmitted to the stroke type expansion piece 222 to reduce the distance between the windshield type expansion pieces and thus reduce it to the required inner diameter size. The stroke type expansion piece 222 transfers the extrusion to the inner sealing ring 221 to make it tightly combined with the cable, ensuring that water vapor does not enter the connector along the cable.

[0040] At the same time, a rubber sealing sleeve 12 is also provided on the outer wall of the shell 1, which is used to tightly cover the connection between the male connector and the female connector after the male connector and the female connector are plugged in after being put on the tower to improve the sealing performance, prevent salt spray, dust and water vapor from entering the connector, and improve the waterproof performance.

[0041] The connector can be connected to the cable before construction to form a harness. Later, when the cable is put on the tower, it can be quickly connected to the tower cabinet through the connector. The preparation method of the harness is as follows:

[0042] S1, wire cutting and sheath stripping

[0043] Use a computerized wire cutting and stripping machine to cut the cable to be manufactured into the specified length according to the height of the wind tower, and strip both ends at the same time. The recommended stripping length for the tower cabinet end is 130±10mm, and the stripping length for the control cabinet end is 200-300mm. Both the inner and outer sheaths need to be stripped, and the braided shielding layer is retained at the tower cabinet end. Cut off the braided shielding at the stripping end of the control cabinet end;

[0044] The 14 insulated wire cores 41 of No. 1 to No. 14 at both ends of the wind energy safety chain cable are directly stripped on a stripping machine to the stripping length required for the crimping terminal, and the 4 insulated wire cores of No. 15 to No. 18 are not stripped.

[0045] S2. Cabling center reinforcement unit processing

[0046] The stripped section is made into a central reinforcement unit of the cable with transparent Mylar using scissors, retaining the flexible stainless steel wire and Kevlar reinforcement layer for subsequent fixing to the core body.

[0047] S3, Tower Cabinet End Wire Harness Installation and Production

[0048] S31, Tower Cabinet Terminal Crimping

[0049] Crimp the 1-14 cores after the insulation stripping at the tower cabinet end with nylon tube pre-insulated terminals;

[0050] S32, Tower cabinet end heat shrink tube heat shrink

[0051] Take a 8-12cm silicone rubber inner double-wall heat shrink tube and heat shrink it at the end of the tower cabinet. The heat shrink lengths of the jacket section and the jacket-free section are symmetrical. The heat shrink silicone rubber inner double-wall heat shrink tube can protect the peeling end and increase the waterproof performance to prevent water vapor from entering the connector through the cable entry hole 23 at the bottom of the shell 1.

[0052] S33, wear waterproof fastener 22 and shell 1

[0053] Pass the arranged cables through the waterproof fastener 22 and the wire entry hole 23 at the bottom of the housing 1, and tighten the nut 225 of the waterproof fastener 22 to ensure that the waterproof fastener 22 is tightly combined with the cable, and the waterproof performance of the connection reaches IP68;

[0054] S34, insulated wire core 41 screw crimping

[0055] Insert the semi-finished wire harnesses with 1-14 nylon tube pre-insulated terminals into the hollows of 1-14 conductor pins 31 respectively, and tighten the conductor screws 33 at the side bolt tightening holes 32. Figure 5 33 places;

[0056] S35, cable center reinforced load-bearing unit 42 screw crimping

[0057] The stainless steel wire and Kevlar reinforcement layer of the cable center reinforcement bearing unit 42 are twisted and inserted into the hollow reinforcement column 34. The screws 36 of the cable center reinforcement unit are tightened at the side crimping bolt holes. Figure 5 36 places;

[0058] S36, shield ground connection

[0059] Twist the shielding layer into the shielding grounding fixing hole 11 and fix it by point welding. You can choose any one of the shielding grounding fixing holes 11 on the left or right side according to the convenience of shielding processing.

[0060] S37, core shell 1 fixed

[0061] Install the core into the outer shell 1, align the fixing screw holes of the core outer shell 1 with the fixing screw holes of the core outer shell 1, and tighten the screws.

[0062] S4, control cabinet production

[0063] S41, heat shrink at control cabinet end

[0064] Take 8-12cm of 125℃ irradiation cross-linked double-wall heat shrink tubing and shrink it at the end of the tower cabinet. The shrinkage lengths of the jacketed section and the non-jacketed section should be symmetrical.

[0065] S42, wear number tube

[0066] The 1-14 cores after the insulation stripping at the control cabinet end are passed through the number tube. When passing through the number tube, the wire cores 41 to be passed through the number tube are first arranged in order, and then each of the wire cores 41 to be passed through the number tube is passed through the number tube.

[0067] S43, Insulated core 41 crimping

[0068] Crimp the nylon tube-type pre-insulated terminals to the 1-14 cores respectively to complete the wiring harness.

[0069] Then you can use heat shrink tube to print the wind energy safety chain harness cable model, length, installation connection start and end points and other information, and heat shrink it at a position 40cm-100cm away from the cable control cabinet.

[0070] Insert the crimped insulated wire cores 41 at the prepared wiring harness control cabinet end into the corresponding control cabinet positions.

[0071] Insert the prepared waterproof male connector of the wind energy safety chain cable at the tower cabinet end directly into the matching female connector of the tower cabinet, put on the male and female connector silicone rubber sealing sleeve 12, and tightly put it on the connection between the male connector and the female connector to improve the sealing performance and prevent salt spray, dust and water vapor from entering the connector, improve the waterproof performance and ensure that the waterproof performance is as high as IP68.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-purpose wind energy safety chain cable waterproof connector, characterized in that: The invention comprises a plug-in core (3) and a shell (1), wherein the shell (1) is fixedly connected to the plug-in core (3); a plurality of conductor pins (31) for inserting wire cores (41) are arranged in an array on one side of the plug-in core (3); the conductor pins (31) are used to connect to a tower cabinet; a plurality of conductor screw crimping holes (33) for fixing the wire core (41) are provided on the side of the plug-in core (3); and a fixing bolt (13) for fixing the tower cabinet end to the connector is also provided on the shell (1); The plug-in core (3) is also provided with a hollow reinforcement column (34) for inserting the cabling center reinforcement bearing unit, and the side of the plug-in core (3) is also provided with a cabling center reinforcement unit screw hole (35) connected to the hollow reinforcement column (34).

2. A multi-purpose wind energy safety chain cable waterproof connector according to claim 1, characterized in that: The housing (1) is fixedly connected to a bottom plate (2), the bottom plate (2) and the housing (1) form a frame, and a wire entry hole (23) is provided on the bottom plate (2).

3. A multi-purpose wind energy safety chain cable waterproof connector according to claim 2, characterized in that: A threaded sleeve is provided at the wire entry hole (23), a waterproof fastener (22) is threadedly connected to the threaded sleeve, and a sealing ring for being sleeved on the cable is provided inside the waterproof fastener (22).

4. A multi-purpose wind energy safety chain cable waterproof connector according to claim 3, characterized in that: The sealing ring is composed of three layers: an inner sealing ring, a stroke vehicle expansion piece, and an outer sealing ring.

5. A multi-purpose wind energy safety chain cable waterproof connector according to claim 4, characterized in that: The inner sealing ring is made of a high-elasticity and temperature-resistant -55°C-200°C silicone rubber layer, the stroke vehicle expansion piece is made of silicone rubber or nitrile rubber, and the outer sealing ring is made of a high-elasticity and temperature-resistant -55°C-200°C silicone rubber layer.

6. A multi-purpose wind energy safety chain cable waterproof connector according to claim 3, characterized in that: The main body (224) of the waterproof fastener (22) is made of nickel-plated brass.

7. A multi-purpose wind energy safety chain cable waterproof connector according to claim 1, characterized in that: The housing (1) is provided with a shielding grounding fixing hole (11).

8. A multi-purpose wind energy safety chain cable waterproof connector according to claim 1, characterized in that: A rubber sealing sleeve (12) is also provided on the outer wall of the housing (1).

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