CN219624443U - Nitrogen drying device for water inlet drying of power cable - Google Patents
Nitrogen drying device for water inlet drying of power cable Download PDFInfo
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- CN219624443U CN219624443U CN202321315482.0U CN202321315482U CN219624443U CN 219624443 U CN219624443 U CN 219624443U CN 202321315482 U CN202321315482 U CN 202321315482U CN 219624443 U CN219624443 U CN 219624443U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model discloses a nitrogen drying device for water inlet drying of a power cable, which relates to the technical field of power lines and electric wire and cable professional matching application, and comprises a nitrogen cylinder, an air duct, a sealing sleeve, an air tap, a heat-shrinkable plugging cap and a cable; the top end of the nitrogen cylinder is connected with a control valve, and a pressure gauge is fixed on the control valve; one end of the air duct is communicated with the air outlet of the control valve and is fastened and fixed; one end of the sealing sleeve can be communicated with the end to be dried of the power cable in a sealing way, and the air tap is fixed at the other end of the sealing sleeve; the mouth end of the air tap can be detachably connected with the opening end of the thermal shrinkage plugging cap, and the cap end of the thermal shrinkage plugging cap is communicated with the other end of the air duct. After the nitrogen drying device is adopted to dry the power cable, the overall physical and mechanical properties of the cable are not affected, and the treated cable has the same use effect and service life as a finished cable.
Description
Technical Field
The utility model relates to the technical field of power line and wire and cable professional matching application, in particular to a nitrogen drying device for drying inlet water of a power cable.
Background
In recent years, the development of electric power transmission and transformation engineering in China is rapid, the large world population in China is particularly numerous, along with the continuous acceleration of the urban process in China, the electric power energy facilities required by living, working and the like of people and the huge development of modern high-intelligence cities are particularly important, the electric power supply comprises the dependence on electric power transmission of home, electricity, office, security, information communication and the like, the electric power transmission is critical in national production and living, and various matched development market prospects of the demands of people are wide; the special cable product for transmitting electric energy is the main equipment of power transmission and transformation engineering, and once the water entering the cable body is wetted, the cable body gradually forms water branch discharge under the action of a high-voltage electromagnetic field to destroy a main insulating layer until breakdown discharge occurs.
The quality assurance of cable construction and laying is very important for reliable operation of cables in the future. The water inflow hazard of the power cable is extremely large, and serious loss and potential safety hazard are brought to national economy construction; under specific environmental conditions, the cable is sometimes stored for a long time due to regional climate influence, and water vapor permeates into the cable body due to improper storage; in particular to a power cable for large-scale engineering in modern cities and a medium-high voltage power cable, which are mostly laid underground and need to often pass through roads, bridges, culverts and the like; because of weather or other reasons, more water is often accumulated in the cable trench, and the situation that the cable head is immersed in water for construction is unavoidable in the laying construction process; the cable is water-filled under the condition of natural disasters, such as heavy rain, flood or pipe penetration damage caused by buried construction, and water in the pipe and human factors; the cable head is inappropriately protected, is not tightly wrapped or is damaged, so that water vapor enters the cable body; in addition, when pulling and threading, the outer sheath and even the steel armor are sometimes scratched, which is particularly the case when mechanical pulling is used. Therefore, the quality of the cable construction and laying of the power line is very critical and important for ensuring reliable operation of the cable in the future; the power cable has extremely large water inflow hazard, the water inflow phenomenon of the cable occurs in special unexpected situations, and the power failure caused by the cable safety problem in a large area of the city can cause a great deal of trouble and pain to people living and living in modern cities; and brings serious economic loss and potential safety hazard to national economy construction.
The treatment mode of the cable water inlet before that is: the water inlet cable is directly cut to a place without water for scrapping treatment, or a new cable is replaced because the electric power is cut off not enough; thus causing great economic waste and also affecting longer construction time; processing new cables from new production requires a great deal of capital investment, production time and transportation process, affects construction period and time, and seriously affects economic property loss;
therefore, how to provide a nitrogen drying device for drying water fed into a power cable, which is capable of physically drying water fed into the cable end, avoiding unnecessary waste and economic loss, is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the utility model provides a nitrogen drying device for drying water inflow of a power cable, which solves the problem of water inflow of the cable end under unexpected conditions by combining the user laying construction service process according to years of cable research, development, production and manufacturing working experience, and prevents unnecessary waste and economic loss of the cable.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a nitrogen drying apparatus for water inlet drying of a power cable, comprising: the device comprises a nitrogen bottle, an air duct, a sealing sleeve, an air tap and a thermal shrinkage plugging cap;
the nitrogen cylinder is sealed, and nitrogen is filled into the nitrogen cylinder; the top end of the nitrogen cylinder is detachably connected with a control valve, and a pressure gauge is fixed on the control valve;
one end of the air duct is communicated with the air outlet of the control valve and is fastened and fixed;
one end of the sealing sleeve can be in sealing communication with the end to be dried of the power cable; the air tap is fixed at the other end of the sealing sleeve; the opening end of the thermal shrinkage plugging cap is detachably connected with the mouth end of the air tap, and a through hole is formed in the cap end of the thermal shrinkage plugging cap, is inserted into the other end of the air duct and is communicated through the through hole.
Through the technical scheme, the cable drying device provided by the utility model is simple and clear in structure, can be used for carrying out nitrogen pressurization drying on the water inlet cable, and avoids the defect that the traditional cable has to be cut off due to water inlet.
Preferably, in the above-mentioned nitrogen gas drying device for power cable water inlet drying, the other end of the air duct extends to the air tap position and is bound and fixed with the air tap. The binding mode is simple and convenient to connect, and can be firmly fastened, so that the air duct and the air tap are sealed.
Preferably, in the above-mentioned nitrogen gas drying device for drying the water inlet of the power cable, the air tap is a metal thread air tap. The air tap is connected with the thermal shrinkage plugging cap and the sealing sleeve, an air inlet cavity is formed in the sealing sleeve, nitrogen pressurization is facilitated, and meanwhile, the thread shape is convenient for fixing the air duct.
Preferably, in the above nitrogen drying device for water inlet drying of a power cable, the inner wall of the heat-shrinkable plugging cap is provided with threads, and the threads are connected with the air tap. Replace the traditional ordinary plugging cap of cable, both can carry out the shutoff to the cable, can connect air cock and seal cover when the cable intakes again, dry the cable.
Preferably, in the above-mentioned nitrogen gas drying device for power cable water inlet drying, the cable middle part is fixed with the center conductor, the outer parcel of center conductor has interior shielding layer, interior shielding layer parcel has the insulating layer outward, the outer parcel of insulating layer has outer shielding layer, outer shielding layer parcel has outer comprehensive protective sheath, outer comprehensive protective sheath is in depth in the seal cover to tie up fixedly. An air inlet cavity is formed between the cable drying end and the inside of the sealing sleeve, and nitrogen can drain water vapor in the cable through the air inlet cavity.
According to the technical scheme, the utility model discloses a nitrogen drying device and a method for drying water inflow of a power cable, and compared with the prior art, the nitrogen drying device and the method have the following beneficial effects:
1. the cable after the device is adopted, the whole physical and mechanical properties cannot be affected, the service effect and the service life of the processed power cable are the same as those of a complete finished cable, and the defect that the traditional cable must be cut or scrapped due to water inflow is avoided.
2. The device has simple structure, convenient installation and use and low cost.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the connection of a nitrogen cylinder provided by the utility model;
FIG. 2 is a schematic diagram of a connection of a plugging assembly according to the present utility model;
FIG. 3 is a schematic diagram showing the connection of a drying device according to the present utility model;
FIG. 4 is a schematic view of a cable structure according to the present utility model;
fig. 5 is a schematic diagram of a cable dry connection according to the present utility model.
Wherein:
1-a nitrogen cylinder; 2-a control valve; 3-a pressure gauge; 4-an airway; 5-thermal shrinkage plugging caps; 6-an air tap; 7-sealing sleeve; 8-a power cable; 9-water outlet end.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
referring to fig. 1 to 3, an embodiment of the present utility model discloses a nitrogen drying device for drying inlet water of a power cable, including: the nitrogen bottle 1, the air duct 4, the sealing sleeve 7, the air tap 6 and the thermal shrinkage plugging cap 5;
the nitrogen bottle 1 is sealed, and nitrogen is filled into the nitrogen bottle; the top end of the nitrogen cylinder 1 is detachably connected with a control valve 2, and a pressure gauge 3 is fixed on the control valve 2;
one end of the air duct 4 is communicated with the air outlet of the control valve 2 and is fastened and fixed;
one end of the sealing sleeve 7 can be communicated with the end to be dried of the power cable in a sealing way; the air tap 6 is fixed at the other end of the sealing sleeve 7; the open end of the thermal shrinkage plugging cap 5 is detachably connected with the mouth end of the air tap 6, and a through hole is formed in the cap end of the thermal shrinkage plugging cap 5, and the thermal shrinkage plugging cap is inserted into the other end of the air duct 4 and communicated with the air duct through the through hole.
In this embodiment, the air tap 6 is a metal thread air tap.
In order to further optimize the technical scheme, the other end of the air duct 4 extends to the position of the air tap 6 and is bound and fixed with the air tap 6.
In order to further optimize the technical scheme, the inner wall of the thermal shrinkage plugging cap 5 is provided with threads which are connected with the air tap 6.
The power cable drying device provided by the embodiment has the advantages of simple and clear structure, convenient installation and use and low manufacturing cost.
Example 2:
referring to fig. 4 to 5, the inlet water power cable was dried using the nitrogen drying apparatus for inlet water drying of power cable in example 1.
In this embodiment, a central conductor 81 is fixed in the middle of the cable 8, an inner shielding layer 82 is wrapped outside the central conductor 81, an insulating layer 83 is wrapped outside the inner shielding layer 82, an outer shielding layer 84 is wrapped outside the insulating layer 83, an outer comprehensive protective sleeve 85 is wrapped outside the outer shielding layer 84, and the outer comprehensive protective sleeve 85 stretches into an opening at the bottom end of the sealing sleeve 7 and is fastened and fixed.
S1, taking off common plugging caps at two ends of a cable 8, sleeving a sealing sleeve 7 of a drying device on an outer comprehensive protective sleeve 85 of the end to be dried of the cable 8, and binding firmly by using a sealing adhesive tape and a steel wire;
s2, sleeving one end of the air duct 4 far away from the control valve 2 on the heat-shrinkable plugging cap 5, enabling the heat-shrinkable plugging cap 5 to fully extend into an opening of the air duct 4, and binding the air duct 4 and the air tap 6 firmly;
s3, slowly opening the control valve 2, and enabling nitrogen to enter an air inlet cavity between the sealed cable 8 and the sealing sleeve 7 along the air tap 6;
s4, controlling the display value of the pressure gauge 3 to be 0.1-0.15 MPa, and enabling nitrogen in the air inlet cavity to enter the cable 8 body under the pressure effect, so that water vapor is discharged.
S5, detecting the water outlet end 9 of the power cable 8 by using test paper, and finishing drying when the color of the test paper is unchanged.
In order to further optimize the technical scheme, after continuously filling nitrogen for 12-24 hours, testing moisture by using a dry test paper, and after the moisture is not tested, continuously filling nitrogen for 24 hours. Ensuring the sufficient drying and safety of the inside of the cable.
In order to further optimize the technical scheme, the adopted nitrogen is high-purity nitrogen.
In order to further optimize the technical scheme, the test paper is silica gel test paper or cobalt chloride test paper, the test paper is blue before water absorption, and is pink after water absorption or water immersion, and the drying condition in the cable can be judged through the color change.
In the power cable drying method provided by the utility model, the whole physical and mechanical properties of the power cable after the drying method are not affected, the dried power cable has the same use effect and service life as the power cable of a perfect finished product, and the defect that the traditional cable must be cut or scrapped due to water inflow is avoided.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A nitrogen gas drying device for water inlet drying of a power cable, comprising: the device comprises a nitrogen bottle (1), an air duct (4), a sealing sleeve (7), an air tap (6) and a thermal shrinkage plugging cap (5);
the nitrogen cylinder (1) is sealed, and nitrogen is filled into the nitrogen cylinder; the top end of the nitrogen cylinder (1) is detachably connected with a control valve (2), and a pressure gauge (3) is fixed on the control valve (2);
one end of the air duct (4) is communicated with an air outlet of the control valve (2);
one end of the sealing sleeve (7) can be in sealing communication with the end to be dried of the power cable; the air tap (6) is fixed at the other end of the sealing sleeve (7); the opening end of the thermal shrinkage plugging cap (5) is detachably connected with the mouth end of the air tap (6), and a through hole is formed in the cap end of the thermal shrinkage plugging cap (5), and the thermal shrinkage plugging cap is inserted into the other end of the air duct (4) and is communicated with the air duct through the through hole.
2. A nitrogen drying device for water inlet drying of a power cable according to claim 1, characterized in that the other end of the air duct (4) extends to the position of the air tap (6) and is fixedly bound with the air tap (6).
3. A nitrogen drying apparatus for water inlet drying of power cables according to claim 1, characterized in that the air tap (6) is a metal screw-shaped air tap.
4. The nitrogen drying device for water inlet drying of the power cable according to claim 1, wherein the inner wall of the heat-shrinkable plugging cap (5) is provided with threads and is connected with the air tap (6) in a threaded manner.
5. The nitrogen gas drying device for water inlet drying of the power cable according to claim 1, further comprising a power cable (8), wherein a central conductor (81) is fixed in the middle of the power cable (8), an inner shielding layer (82) is wrapped outside the central conductor (81), an insulating layer (83) is wrapped outside the inner shielding layer (82), an outer shielding layer (84) is wrapped outside the insulating layer (83), an outer comprehensive protective sleeve (85) is wrapped outside the outer shielding layer (84), and the outer comprehensive protective sleeve (85) stretches into an opening at the bottom end of the sealing sleeve (7) and is fastened and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321315482.0U CN219624443U (en) | 2023-05-29 | 2023-05-29 | Nitrogen drying device for water inlet drying of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321315482.0U CN219624443U (en) | 2023-05-29 | 2023-05-29 | Nitrogen drying device for water inlet drying of power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219624443U true CN219624443U (en) | 2023-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321315482.0U Active CN219624443U (en) | 2023-05-29 | 2023-05-29 | Nitrogen drying device for water inlet drying of power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219624443U (en) |
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2023
- 2023-05-29 CN CN202321315482.0U patent/CN219624443U/en active Active
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