Cable connection accessory and preparation method thereof

Abstract

The invention provides a cable connection accessory and a preparation method thereof, and relates to the technical field of cable accessories, the cable connection accessory comprises a protective shell, one side of the protective shell is connected with a switching device, the protective shell sleeves a cable, a sealing ring is arranged between the protective shell and the switching device, one end of the cable is electrically connected with the switching device, and the other end of the cable is electrically connected with the switching device. The protective shell protects the joint of the cable and the switching device, and the sealing ring seals the gap between the protective shell and the joint of the cable and the switching device, so that external moisture and other impurities are prevented from entering the joint of the cable and the switching device to affect the energization of the cable, and the service life of the cable is prolonged while the sectional area of the conductor is increased. The length of the cable is prolonged, and the current-carrying capability of the cable is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable accessories, and in particular to a cable connection accessory and a preparation method thereof. Background Art

[0002] Power cable accessories are products that connect cables to power transmission and distribution lines and related distribution devices. They generally refer to the intermediate and terminal connections of various cables in the cable lines. Together with the cables, they constitute a power transmission network. Cable accessories are mainly based on the characteristics of the cable structure. They can not only restore the performance of the cable, but also ensure the extension of the cable length and the connection of the terminal. The reliability of high-voltage cable accessories can be judged from aspects such as electrical performance, sealing and moisture-proof performance, mechanical performance and process performance.

[0003] Due to the insufficient installed capacity of the Lemen offshore wind farm project, it is necessary to increase the conductor cross-sectional area and length of the proposed line in this phase to increase the current-carrying capacity of the cable. Therefore, it is necessary to design a cable connection accessory to solve the existing defects. Summary of the invention

[0004] The invention provides a cable connection accessory and a preparation method thereof, which are used to solve the defects in the prior art.

[0005] The present invention provides a cable connection accessory and a preparation method thereof, comprising: a protective shell, one side of the protective shell is connected to a switching device, the protective shell is sleeved outside the cable, and a sealing ring is arranged between the protective shell and the switching device.

[0006] Preferably, two ends of the adapter are provided with a first power socket and a second power socket, and the cable is electrically connected to the first power socket.

[0007] Preferably, the protective shell includes a shielding layer, which is arranged outside the cable, an insulating layer is arranged outside the shielding layer, a winding layer is arranged outside the insulating layer, a flat aluminum sleeve is arranged outside the winding layer, a protective shell is arranged outside the flat aluminum sleeve, and the protective shell has a flared opening on the side facing the adapter, a fixed shell is fixedly connected to the flared opening, and the fixed shell is arranged on the power socket through a thread.

[0008] Preferably, a closing sleeve is provided on the other side of the protective shell, the part of the closing sleeve in contact with the outer surface of the protective shell is connected by a thread, the part of the closing sleeve in contact with the cable is provided with a sealing layer, and a lead sealing layer is provided between the fixed shell and the closing sleeve.

[0009] Preferably, a fixing plate is provided in the protective shell, and a bolt is rotatably provided on a side of the fixing plate facing the outer side of the protective shell, and the bolt passes through the protective shell and is threadedly connected.

[0010] Preferably, it also includes:

[0011] Temperature measurement module 1, used to measure the temperature value of the external environment of a cable;

[0012] Temperature measurement module 2, used to measure the temperature value inside the cable;

[0013] A current measurement module is used to measure the current value inside the cable;

[0014] A calculation module 1 is used to calculate the real-time heat generation rate of the cable based on the temperature value inside the cable;

[0015] A processing module, used for comparing the real-time heat generation rate of the cable obtained by the calculation module 1 with the rated heat generation rate of the cable;

[0016] Control module, when the real-time heat generation rate of the cable is greater than the rated heat generation rate of the cable, the alarm module sounds an alarm and cuts off the power to the cable for maintenance; when the real-time heat generation rate of the cable is less than or equal to the rated heat generation rate of the cable, the cable works normally.

[0017] Preferably, the calculation module 1 calculates based on the following formula 1:

[0018]

[0019] Q is the real-time heat generation rate of the cable, π is the circumference of the circle, r is the radius of the cable, ρ t is the resistivity of the cable at rated temperature, a t is the temperature coefficient of the cable at the highest temperature, T1 is the temperature value of the cable's external environment, t is the temperature value inside the cable, T2 is the thermal resistance coefficient between the cable and the shielding layer, T3 is the thermal resistance coefficient between the shielding layer and the insulating layer, T4 is the thermal resistance coefficient between the insulating layer and the winding layer, T5 is the thermal resistance coefficient between the winding layer and the flat aluminum sheath, R is the rated resistance of the cable, and I is the current value in the cable.

[0020] Preferably, a method for preparing a cable connection accessory is applied to a cable connection accessory as described in any one of the above claims, characterized in that the method for preparing the cable connection accessory comprises the following steps:

[0021] S1. Measure the length of the adapter and use a stripper to remove the outer sheath of the cable according to the measured length for pre-processing;

[0022] S2. Put the sealing sleeve on the cable;

[0023] S3, attaching the pre-treated cable to the outer layer of the cable in the order of shielding layer, insulating layer, winding layer, flat aluminum sleeve, and protective shell;

[0024] S4, inserting the cable into the power socket 1 of the adapter;

[0025] S5, welding the expanded side of the protective shell to the fixed shell;

[0026] S6. Rotate and screw the sealing sleeve onto the other side of the protective shell;

[0027] S7. Welding a sealing lead layer at the connection gap between the sealing sleeve and the protective shell;

[0028] S8. Turn the bolts at both ends until rotation is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of a cross-sectional structure provided by an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the preparation process provided by an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. Cable; 2. Adapter; 21. Plug port 1; 22. Plug port 2; 3. Protective shell; 31. Shielding layer; 32. Insulating layer; 33. Wrapping layer; 34. Flat aluminum sleeve; 35. Protective shell; 351. Expanding; 36. Fixed shell; 37. Closing sleeve; 38. Lead sealing layer; 4. Sealing ring; 5. Sealing layer; 6. Fixed plate; 61. Bolt. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention provides the following embodiments

[0038] Example 1

[0039] An embodiment of the present invention provides a cable connection accessory, such as Figure 1 , Figure 2 As shown, it includes: a protective shell 3, one side of the protective shell 3 is connected to the adapter 2, the protective shell 3 is sleeved outside the cable 1, and a sealing ring 4 is arranged between the protective shell 3 and the adapter 2.

[0040] The working principle and beneficial effects of the above technical solution are as follows: one end of the cable 1 is electrically connected to the adapter 2, the protective shell 3 protects the connection between the cable 1 and the adapter 2, and the sealing ring 4 seals the gap between the protective shell 3 and the cable 1 and the adapter 2 to prevent external moisture and impurities from entering the connection between the cable 1 and the adapter 2 and affecting the power supply of the cable 1. While increasing the cross-sectional area of ​​the conductor, the length of the cable 1 is extended, thereby increasing the current-carrying capacity of the cable 1.

[0041] Example 2

[0042] On the basis of Example 1, Figure 1 , Figure 2 As shown, a first power socket 21 and a second power socket 22 are provided at both ends of the adapter 2 , and the cable 1 is electrically connected to the first power socket 21 .

[0043] The working principle and beneficial effects of the above technical solution are as follows: plug port 1 21 and plug port 2 22 are connectors for high-voltage cable 1 , plug port 1 21 is electrically connected to one end of the processed cable 1 , and plug port 2 22 is electrically connected to one end of the processed cable 1 , which facilitates the extension of cable 1 .

[0044] Example 3

[0045] On the basis of Example 2, Figure 1 , Figure 2 As shown, the protective shell 3 includes a shielding layer 31, the shielding layer 31 is arranged outside the cable 1, an insulating layer 32 is arranged outside the shielding layer 31, a winding layer 33 is arranged outside the insulating layer 32, a flat aluminum sleeve 34 is arranged outside the winding layer 33, a protective shell 35 is arranged outside the flat aluminum sleeve 34, and the side of the protective shell 35 facing the adapter 2 is a flared opening 351, and a fixed shell 36 is fixedly connected to the flared opening 351, and the fixed shell 36 is arranged on the socket 21 through threads.

[0046] The working principle and beneficial effects of the above technical solution are as follows: the shielding layer 31 shields the electromagnetic signals generated inside the cable 1 and transmitted from the outside, preventing the electromagnetic signals from affecting the transmission quality of the internal signals of the cable 1, thereby ensuring the stability of the transmission of the cable 1; the insulating layer 32 electrically isolates the conductor in the cable 1 from the surrounding environment, preventing the current from flowing freely between the conductors in the cable 1 or between the conductor and the external environment, ensuring that the electric energy can be transmitted along a predetermined path, thereby protecting the safety of electrical equipment and personnel; the winding layer 33 can ensure that the cable 1 line, the shielding layer 31, and the insulating layer 32 therein remain cylindrical during use, while ensuring that the cable 1 is connected to the power socket 21. The flat aluminum sleeve 34 can further prevent external electromagnetic signal interference, and the anti-corrosion performance of the aluminum sleeve itself can resist the erosion of harmful factors such as moisture and chemicals leaked from the outside, thereby ensuring that the internal structure of the cable 1 is not damaged. The aluminum sleeve also plays a certain physical protection role. The protective shell 35 can protect the cable 1 body and the connection between the cable 1 and the adapter 2 from external mechanical damage, and has stable performance within a certain temperature range to prevent the cable 1 from being damaged due to extreme temperature conditions. The flared opening 351 of the protective shell 35 facing the adapter 2 is the same as the diameter of the fixed shell 36, which facilitates the welding of the flared opening 351 with the fixed shell 36 outside the plug-in port 21.

[0047] Example 4

[0048] On the basis of Example 3, Figure 1 , Figure 2 As shown, a closing sleeve 37 is provided on the other side of the protective shell 35, the portion where the closing sleeve 37 contacts the outer surface of the protective shell 35 is connected by threads, the portion where the closing sleeve 37 contacts the cable 1 is provided with a sealing layer 5, and a lead sealing layer 38 is provided between the fixed shell 36 and the closing sleeve 37.

[0049] The working principle and beneficial effects of the above technical solution are as follows: the closing sleeve 37 seals the other side between the protective shell 35 and the cable 1, and the gap between the cable 1 and the closing sleeve 37 is sealed by the sealing layer 5 to prevent corrosion by harmful factors such as external moisture and chemicals. The sealing lead layer 38 has an extremely important sealing and waterproofing effect on the internal connection of the cable 1, which can ensure that the protective shell 35 of the cable 1 is connected to other electrical equipment to form a good grounding system, while preventing external moisture and humidity from invading the interior of the cable 1, thereby enhancing the life and safety of the cable 1.

[0050] Example 5

[0051] On the basis of Example 4, Figure 1 , Figure 2 As shown, a fixing plate 6 is disposed in the protective shell 35 , and a bolt 61 is rotatably disposed on a side of the fixing plate 6 facing the outer side of the protective shell 35 , and the bolt 61 passes through the protective shell 35 and is threadedly connected.

[0052] The working principle and beneficial effects of the above technical solution are as follows: the protective shell 35 limits the bolt 61, the bolt 61 is rotatably connected to the fixing plate 6, and the threaded connection between the bolt 61 and the protective shell 35 enables the bolt 61 to be rotated, and the bolt 61 drives the fixing plate 6 to vertically extend into or out of the protective shell 35, thereby achieving the fixing plate 6 to fasten the cable 1 and the external shielding layer 31, insulating layer 32, and winding layer 33, preventing the cable 1 and the external shielding layer 31, insulating layer 32, and winding layer 33 from loosening and affecting the conductivity of the cable 1.

[0053] Example 6

[0054] On the basis of Example 3, the invention further includes:

[0055] Temperature measurement module 1, used to measure the temperature value of the external environment of a cable 1;

[0056] Temperature measurement module 2, used to measure the temperature value inside the cable 1;

[0057] A current measurement module, used to measure the current value inside the cable 1;

[0058] A calculation module 1 is used to calculate the real-time heat generation rate of the cable 1 based on the temperature value inside the cable 1;

[0059] A processing module, used for comparing the real-time heat generation rate of the cable 1 obtained by the calculation module 1 with the rated heat generation rate of the cable 1;

[0060] Control module, when the real-time heat generation rate of cable 1 is greater than the rated heat generation rate of cable 1, the alarm module sounds an alarm and cuts off the power to cable 1 for maintenance; when the real-time heat generation rate of cable 1 is less than or equal to the rated heat generation rate of cable 1, cable 1 works normally.

[0061] The working principle and beneficial effects of the above technical solution are as follows: temperature measurement module 1 measures the temperature value of the external environment of cable 1, temperature measurement module 2 measures the temperature value inside cable 1, current measurement module measures the current value inside cable 1, calculation module 1 calculates the real-time heat generation rate of cable 1 based on the temperature value inside cable 1, and processing module compares the real-time heat generation rate of cable 1 obtained by calculation module 1 with the rated heat generation rate of cable 1. When the real-time heat generation rate of cable 1 is greater than the rated heat generation rate of cable 1, the control module alarm module sounds an alarm and powers off cable 1 for maintenance; when the real-time heat generation rate of cable 1 is less than or equal to the rated heat generation rate of cable 1, cable 1 works normally.

[0062] Example 7

[0063] Based on Example 3, the calculation module 1 calculates based on the following formula 1:

[0064]

[0065] Q is the real-time heat generation rate of cable 1, π is the circumference of a circle, r is the radius of cable 1, ρ t is the resistivity of cable 1 at rated temperature, a t is the temperature coefficient of cable 1 at the highest temperature, T1 is the temperature value of the external environment of cable 1, t is the temperature value inside cable 1, T2 is the thermal resistance coefficient between cable 1 and shielding layer 31, T3 is the thermal resistance coefficient between shielding layer 31 and insulating layer 32, T4 is the thermal resistance coefficient between insulating layer 32 and winding layer 33, T5 is the thermal resistance coefficient between winding layer 33 and flat aluminum sleeve 34, R is the rated resistance of cable 1, and I is the current value in cable 1.

[0066] The working principle and beneficial effects of the above technical solution are: Calculate the resistance of cable 1 at the highest operating temperature by The real-time heat generation rate of cable 1 is calculated. When the real-time heat generation rate of cable 1 is greater than the rated heat generation rate of cable 1, the control module alarm module sounds an alarm and power off cable 1 for maintenance; when the real-time heat generation rate of cable 1 is less than or equal to the rated heat generation rate of cable 1, cable 1 works normally.

[0067] Example 8

[0068] The embodiment of the present invention also provides a method for preparing a cable connection accessory, which is applied to a cable connection accessory as described above, such as Figure 3 As shown, the method for preparing the cable connection accessories comprises the following steps:

[0069] S1, measuring the length of the adapter 2, and using a stripper to remove the outer sheath of the cable 1 for pre-processing according to the measured length;

[0070] S2, putting the sealing sleeve 37 on the cable 1;

[0071] S3, attaching the pretreated cable 1 to the outer layer of the cable 1 in the order of shielding layer 31, insulating layer 32, winding layer 33, flat aluminum sleeve 34, and protective shell 35;

[0072] S4, insert the cable 1 into the power socket 21 of the adapter 2;

[0073] S5, welding one side of the expanded opening 351 of the protective shell 35 to the fixed shell 36;

[0074] S6, rotating and screwing the sealing sleeve 37 onto the other side of the protective shell 35;

[0075] S7, welding the lead sealing layer 38 at the connection gap between the sealing sleeve 37 and the protective shell 35;

[0076] S8. Rotate the bolts 61 at both ends until the rotation is blocked.

[0077] The working principle and beneficial effects of the above technical solution are as follows: firstly, the length of the adapter 2 is measured, and the outer skin of the cable 1 is removed and cleaned using a stripper according to the measured length of the adapter 2 to prevent the impurities on the cable 1 from affecting the connection between the cable 1 and the adapter 2, and the closing sleeve 37 is first passed through the cable 1, and the cleaned portion of the cable 1 is attached to the outer layer of the cable 1 in the order of the shielding layer 31, the insulating layer 32, the winding layer 33, the flat aluminum sleeve 34, and the protective shell 35, and a part is left unattached, and the unattached part of the cable 1 is connected to the plug of the adapter 2. The electrical port 21 is electrically connected, and then one side of the expanded port 351 of the protective shell 35 is welded to the fixed shell 36, and then the closing sleeve 37 is rotated and screwed to the other side of the protective shell 35 to seal the space inside the protective shell 35, and the lead sealing layer 38 is continued to be welded at the connection gap between the closing sleeve 37 and the protective shell 35, and finally the bolt 61 is rotated until the rotation is blocked to ensure that the fixing plates 6 at both ends tighten the cable 1 and the external shielding layer 31, insulating layer 32, and winding layer 33 of the cable 1 to ensure that the looseness of the cable 1 and the external shielding layer 31, insulating layer 32, and winding layer 33 will not affect the performance of the cable 1.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable connection accessory, characterized in that: include: A protective shell (3), one side of the protective shell (3) is connected to the adapter (2), the protective shell (3) is sleeved outside the cable (1), and a sealing ring (4) is provided between the protective shell (3) and the adapter (2).

2. A cable connection accessory according to claim 1, characterized in that: The two ends of the adapter (2) are provided with a first power socket (21) and a second power socket (22), and the cable (1) is electrically connected to the first power socket (21).

3. A cable connection accessory according to claim 2, characterized in that: The protective shell (3) comprises a shielding layer (31), the shielding layer (31) is arranged outside the cable (1), an insulating layer (32) is arranged outside the shielding layer (31), a winding layer (33) is arranged outside the insulating layer (32), a flat aluminum sleeve (34) is arranged outside the winding layer (33), a protective shell (35) is arranged outside the flat aluminum sleeve (34), and a side of the protective shell (35) facing the adapter (2) is a flared opening (351), a fixed shell (36) is fixedly connected to the flared opening (351), and the fixed shell (36) is arranged on the electrical socket (21) through a thread.

4. A cable connection accessory according to claim 3, characterized in that: A closing sleeve (37) is provided on the other side of the protective shell (35); the portion of the closing sleeve (37) in contact with the outer surface of the protective shell (35) is connected by threads; the portion of the closing sleeve (37) in contact with the cable (1) is provided with a sealing layer (5); and a lead sealing layer (38) is provided between the fixed shell (36) and the closing sleeve (37).

5. A cable connection accessory according to claim 4, characterized in that: A fixing plate (6) is arranged inside the protective shell (35), and a bolt (61) is arranged on a surface of the fixing plate (6) that is rotatably disposed toward the outer side of the protective shell (35). The bolt (61) passes through the protective shell (35) and is connected by threads.

6. A cable connection accessory and a method for preparing the same according to claim 5, characterized in that: Also includes: Temperature measurement module 1, used for measuring the temperature value of the external environment of a cable (1); Temperature measurement module 2, used for measuring the temperature value inside the cable (1); A current measuring module, used for measuring the current value inside the cable (1); A calculation module 1, used for calculating the real-time heat generation rate of the cable (1) based on the temperature value inside the cable (1); A processing module, used for comparing the real-time heat generation rate of the cable (1) obtained by the calculation module 1 with the rated heat generation rate of the cable (1); The control module is configured to generate an alarm and disconnect the power supply of the cable (1) for maintenance when the real-time heat generation rate of the cable (1) is greater than the rated heat generation rate of the cable (1); When the real-time heat generation rate of the cable (1) is less than or equal to the rated heat generation rate of the cable (1), the cable (1) operates normally.

7. A cable connection accessory and a method for preparing the same according to claim 6, characterized in that: The calculation module 1 calculates based on the following formula 1: Q is the real-time heat generation rate of the cable (1), π is the circumference of a circle, r is the radius of the cable (1), ρ t is the resistivity of the cable (1) at rated temperature, a t is the temperature coefficient of the cable (1) at the highest temperature, T1 is the temperature value of the external environment of the cable (1), t is the temperature value inside the cable (1), T2 is the thermal resistance coefficient between the cable (1) and the shielding layer (31), T3 is the thermal resistance coefficient between the shielding layer (31) and the insulating layer (32), T4 is the thermal resistance coefficient between the insulating layer (32) and the winding layer (33), T5 is the thermal resistance coefficient between the winding layer (33) and the flat aluminum sleeve (34), R is the rated resistance of the cable (1), and I is the current value in the cable (1).

8. A method for preparing a cable connection accessory, applied to a cable connection accessory as claimed in any one of claims 1 to 7, characterized in that: The method for preparing the cable connection accessories comprises the following steps: S1, measuring the length of the adapter (2), and using a stripper to remove the outer sheath of the cable (1) for pre-processing according to the measured length; S2, putting the sealing sleeve (37) on the cable (1); S3, attaching the pretreated cable (1) to the outer layer of the cable (1) in the order of a shielding layer (31), an insulating layer (32), a winding layer (33), a flat aluminum sleeve (34), and a protective shell (35); S4, inserting the cable (1) into the power socket 1 (21) of the adapter (2); S5, welding one side of the expanded opening (351) of the protective shell (35) to the fixed shell (36); S6, rotating and screwing the sealing sleeve (37) onto the other side of the protective shell (35); S7, welding a sealing lead layer (38) at the connection gap between the sealing sleeve (37) and the protective shell (35); S8. Turn the bolts (61) at both ends until the rotation is blocked.

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