Drying device for water-blocking conductor

Abstract

The utility model relates to a drying device for a water-blocking conductor, the water-blocking conductor comprises a conductor and water-blocking tapes arranged on the inner layer and the outer layer of the conductor, and the drying device comprises a first electromagnetic heating assembly, a hot drying assembly and a second electromagnetic heating assembly, each of the first electromagnetic heating assembly and the second electromagnetic heating assembly comprises a pipe body for the water-blocking conductor to pass through, and an electrified electromagnetic induction coil is wound outside the pipe body; and the water-blocking conductor sequentially passes through the first electromagnetic heating assembly, the hot drying assembly and the second electromagnetic heating assembly, so that the water-blocking conductor can be heated from inside to outside, heated from outside to inside and preheated. The utility model provides a drying device for a water-blocking conductor, which can realize the combination of a plurality of heating modes from inside to outside and from outside to inside, and improves the heating uniformity and drying efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying device technical field especially is a kind of drying device for water-blocking conductor. BACKGROUND

[0002] When preparing large-length submarine cable conductor, in order to prevent water from penetrating into conductor under the action of high pressure to cause short circuit or other faults, water-blocking conductor needs to be used, that is, water-blocking tape is arranged in the inner and outer layers of conductor, generally, longitudinal wrapping water-blocking tape is arranged in conductor, and wrapping water-blocking tape is arranged outside conductor;And the production cycle of water-blocking conductor applied in submarine cable is long (7-10 days), and conductor absorbs water vapor in air during production process, resulting in water vapor gathering in conductor, especially, these water-blocking tapes can absorb moisture in environment or contain certain moisture due to production process, if these moisture cannot be completely removed, water vapor in conductor will affect product quality during crosslinking process.

[0003] At present, traditional drying method mainly includes hot air drying.But the method has the following shortcomings:

[0004] Uneven heating: traditional heating method can only heat conductor from outside, resulting in lower internal temperature, and the water-blocking tape arranged in conductor cannot be heated and dried, so it is difficult to achieve ideal drying effect.

[0005] Low efficiency: traditional heating method can only heat conductor from outside, and due to the time required for heat conduction, the drying period is long, and the production efficiency is reduced.

[0006] In addition, the conductor with metal shielding layer or composite material is difficult to heat and dry the internal water-blocking tape due to the reflection or blocking of heat radiation by the metal shielding layer. INVENTION CONTENTS

[0007] Therefore, the utility model wants to overcome the problem that traditional heating method in prior art can only heat conductor from outside, resulting in insufficient drying of water-blocking tape in conductor, provide a drying device for water-blocking conductor, which can realize the combination of various heating methods from inside to outside and from outside to inside, improve the uniformity and drying efficiency of heating.

[0008] To solve the above technical problems, the utility model provides a drying device for water-blocking conductor, the water-blocking conductor includes: conductor and water-blocking tape arranged in the inner and outer layers of conductor, and the drying device includes: first electromagnetic heating assembly, hot drying assembly and second electromagnetic heating assembly, wherein:

[0009] The first electromagnetic heating assembly and the second electromagnetic heating assembly each comprise a pipe body through which the water-blocking conductor passes, and an electromagnetic induction coil is wound outside the pipe body and is electrified;

[0010] The water-blocking conductor sequentially passes through the first electromagnetic heating assembly, the hot drying assembly and the second electromagnetic heating assembly, so as to realize heating from inside to outside, heating from outside to inside and preheating of the internal conductor of the water-blocking conductor, respectively.

[0011] In an embodiment of the utility model, the pipe body is a heat preservation pipe made of heat preservation cotton.

[0012] In an embodiment of the utility model, the first electromagnetic heating assembly and the second electromagnetic heating assembly further comprise a shield cover arranged outside the pipe body.

[0013] In an embodiment of the utility model, the first electromagnetic heating assembly and the second electromagnetic heating assembly further comprise an electromagnetic controller connected in a closed loop with the electromagnetic induction coil, the electromagnetic controller is connected with an alternating current power supply, and the electromagnetic controller can control the on-off of the electromagnetic induction coil.

[0014] In an embodiment of the utility model, the electromagnetic controller controls the on-off time, current intensity and frequency of the alternating current power supply, and can control the temperature of heating.

[0015] In an embodiment of the utility model, the electromagnetic induction coil is wound outside the pipe body in sections along the extension direction of the pipe body.

[0016] In an embodiment of the utility model, a temperature measuring point is arranged in the pipe body.

[0017] In an embodiment of the utility model, the hot drying assembly comprises:

[0018] The drying box has a drying channel through which the water-blocking conductor passes, and an air inlet and an air outlet;

[0019] The drying hot air blower is in communication with the air inlet and the air outlet, and forms a circulating hot drying air flow in the drying channel.

[0020] In an embodiment of the utility model, the utility model further comprises a wire paying-out device, a traction device and a wire winding device, and the wire paying-out device, the traction device and the wire winding device cooperate to realize paying-out and winding of the water-blocking conductor.

[0021] In an embodiment of the utility model, the traction device is a traction wheel, and the traction wheel can change the advancing direction of the water-blocking conductor.

[0022] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0023] The drying device for water-blocking conductor disclosed by the utility model, on the basis of the existing hot drying heating, introduces electromagnetic heating technology, can directly heat the conductor, so as to realize the heating effect from inside to outside, can heat the internal water-blocking tape, can effectively remove the internal moisture; through the combination of electromagnetic induction heating and hot air circulation, it is ensured that the conductor and the water-blocking tape on the inside and outside of the conductor can be heated comprehensively and uniformly.

[0024] And, the second electromagnetic heating assembly is arranged, after the water-blocking conductor is heated from inside to outside and from outside to inside respectively, the conductor is still continuously subjected to preset treatment, can provide certain temperature condition for subsequent high-temperature crosslinking process, improves the production speed of high-temperature crosslinking. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to make the content of the utility model more easily be clearly understood, the following is according to the specific embodiment of the utility model and combines the attached drawing, and the utility model is further detailed, wherein:

[0026] Figure 1 It is the overall structure schematic diagram of the drying device for water-blocking conductor of the utility model;

[0027] Figure 2 It is the structure schematic diagram of the first electromagnetic heating assembly of the utility model.

[0028] Description of the drawings reference sign: 1, first electromagnetic heating assembly;11, pipe body;12, electromagnetic induction coil;13, electromagnetic controller;14, temperature measuring point;15, shield;2, hot drying assembly;3, second electromagnetic heating assembly;4, traction wheel. DETAILED DESCRIPTION

[0029] The utility model is further explained in connection with the attached drawing and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0030] As described above, the water-blocking conductor is generally required in the long-distance transmission submarine cable, and the water-blocking conductor comprises a conductor and a water-blocking tape arranged in the inner and outer layers of the conductor, compared with other cable structures, the water-blocking tape of the water-blocking conductor is not only arranged outside the conductor, but also arranged inside the conductor, if only the existing hot drying device is used to heat the water-blocking conductor of this type, the heating is uneven, the heating efficiency is low, and even the heat cannot be transmitted to the internal water-blocking tape through the conductor.

[0031] To solve this problem, for the case of water blocking tape inside the conductor, the utility model discloses a kind of drying device for water blocking conductor, refer to Figure 1 As shown in the figure, the drying device includes: first electromagnetic heating component 1, hot drying component 2 and second electromagnetic heating component 3, the water blocking conductor is sequentially passed from the first electromagnetic heating component 1, hot drying component 2 and second electromagnetic heating component 3, when the water blocking conductor passes through first electromagnetic heating component 1 and second electromagnetic heating component 3, the principle of electromagnetic induction heating is used to heat the conductor inside, so that the water blocking conductor sequentially passes through the first electromagnetic heating component 1, hot drying component 2 and second electromagnetic heating component 3, and the effect of heating from inside to outside, from outside to inside and preheating the conductor inside the water blocking conductor can be realized respectively;Through the combination of electromagnetic induction heating and hot air circulation, it is ensured that the conductor and the water blocking tape on the inside and outside of the conductor can be heated comprehensively and uniformly;And, by setting the second electromagnetic heating component 3, after heating from inside to outside and from outside to inside of the water blocking conductor respectively, the conductor is still preprocessed, which can provide certain temperature conditions for subsequent high-temperature crosslinking process, and improve the production speed of high-temperature crosslinking.

[0032] Refer to Figure 2 As shown in the figure, the first electromagnetic heating component 1 and the second electromagnetic heating component 3 are the same structure, and the first electromagnetic heating component 1 is taken as an example for description: the first electromagnetic heating component 1 and the second electromagnetic heating component 3 both include: a pipe body 11 for the water blocking conductor to pass through, an electromagnetic induction coil 12 is wound outside the pipe body 11, the electromagnetic induction coil 12 (usually made of copper or aluminum or other conductive materials), that is, copper wire or aluminum wire is wound into one or more turns of coil, when alternating current passes through these coils, an alternating magnetic field changing with time will be generated around them, and this alternating magnetic field will penetrate into the conductor placed in the coil, according to Faraday's law of electromagnetic induction, the alternating magnetic field will induce eddy current in the conductor, that is, circular current, when the eddy current generated by induction flows in the conductor, heat will be generated due to the resistance of the conductor, this heat is called Joule heating or resistance heating, and the heat is generated directly in the conductor, so the heating efficiency is very high, and the heat distribution is relatively uniform.

[0033] Specifically, in order to realize effective control of heating, in the embodiment, the first electromagnetic heating component 1 and the second electromagnetic heating component 3 further include: an electromagnetic controller 13 connected in closed loop with the electromagnetic induction coil 12, the electromagnetic controller 13 is connected with an alternating current power supply, the electromagnetic controller 13 can control the on-off of the electromagnetic induction coil 12, and the electromagnetic controller 13 can start or stop heating quickly according to needs, which reduces unnecessary heating time and improves the efficiency of the entire drying process.

[0034] And according to the actual use requirements, the electromagnetic controller 13 can also control the on-off time, current intensity and frequency of the alternating current power supply, so as to achieve the purpose of controlling the heating temperature. Through accurate control of the heating parameters, material damage or performance degradation caused by excessive temperature can be effectively avoided, and the influence of insufficient heating on the drying effect can be prevented.

[0035] Specifically, in order to realize closed-loop control of temperature, a temperature measuring point 14 is arranged in the pipe body 11, and a temperature sensor is arranged at the temperature measuring point 14. The electromagnetic controller 13 can be integrated with the temperature sensor to form a complete automatic temperature control system, realizing accurate control of the temperature of the entire drying process.

[0036] Specifically, when the electromagnetic induction coil 12 is actually arranged, the electromagnetic induction coil 12 is wound on the outer surface of the pipe body 11 along the extension direction of the pipe body 11 in sections, and a sectional control wiring mode is adopted, mainly considering safety and efficiency:

[0037] In terms of safety: the coil wound in sections can disperse the current load and avoid that a certain section of the coil is in a high-load working state for a long time, thereby reducing the risk of aging and damage of the coil and prolonging the service life of the equipment

[0038] In terms of efficiency: through sectional control, different heating powers and times can be set in different sections to form a reasonable temperature gradient, so that heat is gradually transferred, continuous and stable heating of the conductor can be realized, and production efficiency is improved.

[0039] Referring to Figure 2 The pipe body 11 is a heat preservation pipe made of heat preservation cotton. The heat preservation cotton has excellent heat insulation performance and can effectively prevent heat loss from the pipe body 11. This not only improves the heating efficiency, but also reduces energy consumption, realizes energy saving and consumption reduction, and through reducing heat loss, the heat preservation cotton can help maintain the temperature stability inside the pipe body 11, ensure that the temperature fluctuation is small during the heating process, and provide more uniform heating effect.

[0040] Similarly, in order to further improve the heat preservation effect, the first electromagnetic heating assembly 1 and the second electromagnetic heating assembly 3 further comprise a protective cover 15 arranged outside the pipe body 11. The protective cover 15 can slow down the heat loss and reduce energy consumption.

[0041] Specifically, the heat drying assembly 2 comprises a drying box and a drying air blower, wherein the drying box has a drying channel for the water-blocking conductor to pass through, and an air inlet and an air outlet, the drying air blower communicates with the air inlet and the air outlet, the drying air blower blows hot air into the air inlet, heats the water-blocking conductor, and then returns to the drying air blower through the air outlet, so as to form a circulating hot drying airflow in the drying channel.

[0042] It should be noted that the heat drying assembly 2 is a prior art, and its structure can refer to the Chinese utility model patent with the publication number CN216204996U and the invention name of "Online drying device for cable wrapping wire core", which will not be repeated here.

[0043] In actual application, in order to realize the take-up and pay-off of the water-blocking conductor, the drying device of the utility model further comprises a pay-off device, a traction device and a take-up device, the pay-off device, the traction device and the take-up device cooperate to realize the take-up and pay-off of the water-blocking conductor, through the cooperative work of the pay-off device, the traction device and the take-up device, the automatic continuous processing of the conductor can be realized, manual intervention is reduced, and the production efficiency is greatly improved.

[0044] Moreover, the synchronization and coordination between the pay-off device, the traction device and the take-up device can ensure that the water-blocking conductor travels at a constant speed in the whole drying process, avoiding the influence of speed fluctuation on the heating effect.

[0045] Specifically, in the embodiment, the traction device is a traction wheel 4, through which the traveling direction of the water-blocking conductor can be changed, so that the water-blocking conductor can smoothly transition between different assemblies, which is particularly important for production lines with complex layout, can optimize the space utilization of the equipment, and reduce the floor area; and by changing the traveling direction of the water-blocking conductor, different production process requirements such as multi-section heating, cooling or detection can be better adapted to, improving the flexibility and adaptability of the production line.

[0046] Obviously, the above embodiments are only examples for clear illustration, and are not a limitation on the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A drying apparatus for a water-blocking conductor, the water-blocking conductor comprising: The water-blocking conductor and the water-blocking tape arranged on the inner and outer layers of the conductor, characterized in that the drying device comprises a first electromagnetic heating assembly, a heat drying assembly and a second electromagnetic heating assembly, wherein: The first electromagnetic heating assembly and the second electromagnetic heating assembly each comprise a pipe body through which the water-blocking conductor passes, and an electromagnetic induction coil is wound outside the pipe body and is electrified; The water-blocking conductor sequentially passes through the first electromagnetic heating assembly, the heat drying assembly and the second electromagnetic heating assembly, so as to realize the heating from inside to outside, the heating from outside to inside and the preheating of the internal conductor of the water-blocking conductor, respectively.

2. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: The pipe body is a heat preservation pipe made of heat preservation cotton.

3. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: The first electromagnetic heating assembly and the second electromagnetic heating assembly further comprise a shield cover arranged outside the pipe body.

4. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: The first electromagnetic heating assembly and the second electromagnetic heating assembly further comprise an electromagnetic controller connected in a closed loop with the electromagnetic induction coil, the electromagnetic controller is connected with an alternating current power supply, and the electromagnetic controller can control the on-off of the electromagnetic induction coil.

5. The drying apparatus for water-blocking type conductors according to claim 4, characterized by: The electromagnetic controller controls the on-off time, current intensity and frequency of the alternating current power supply, and can control the temperature of the heating.

6. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: The electromagnetic induction coil is segmented and wound outside the pipe body along the extension direction of the pipe body.

7. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: A temperature measuring point is arranged in the pipe body.

8. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: The heat drying assembly comprises: A drying box having a drying channel through which the water-blocking conductor passes, and an air inlet and an air outlet; A drying air blower which is in communication with the air inlet and the air outlet and forms a circulating hot drying air flow in the drying channel.

9. The drying apparatus for water-blocking type conductors according to claim 1, characterized by: Further comprising: A wire paying-out device, a traction device and a wire winding device, and the wire paying-out device, the traction device and the wire winding device cooperate to realize the paying-out and winding of the water-blocking conductor.

10. The drying apparatus for water-blocking type conductors according to claim 9, characterized by: Further comprising: The traction device is a traction wheel, and the advancing direction of the water-blocking conductor can be changed through the traction wheel.

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