CN107514900B - Cable dehumidification equipment - Google Patents
Cable dehumidification equipment Download PDFInfo
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- CN107514900B CN107514900B CN201710954975.1A CN201710954975A CN107514900B CN 107514900 B CN107514900 B CN 107514900B CN 201710954975 A CN201710954975 A CN 201710954975A CN 107514900 B CN107514900 B CN 107514900B
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- cable
- nitrogen
- heating device
- distribution box
- dehumidified
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 242
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 117
- 238000010438 heat treatment Methods 0.000 claims abstract description 92
- 239000007789 gas Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 229910001873 dinitrogen Inorganic materials 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
Abstract
The invention is suitable for the technical field of power equipment, and provides cable dehumidification equipment, which comprises a nitrogen source, a nitrogen heating device, an inflation head, a variable-multiple gas distribution box and a cable to be dehumidified; the nitrogen source is connected with the input end of the nitrogen heating device, the output end of the nitrogen heating device is respectively connected with the inflating head and the one-to-many air dividing box, the inflating head is connected with the outer sheath of the cable to be dehumidified, the one-to-many air dividing box is connected with the cable core sheath of the cable to be dehumidified, and the heated dry nitrogen is adopted to realize remarkable water discharging effect on the cable sheath and the cable core, so that the cable sheath and the cable core can be quickly and effectively dehumidified; the equipment is characterized in that the variable multi-gas distribution box is connected with the outer sheath of the cable to be dehumidified and the wire core sheath of the cable to be dehumidified by adopting a sealing structure, so that the installation is simple and quick, and the air tightness is ensured. The device is simple and reliable, can be operated by a single person, and saves labor cost.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to cable dehumidification equipment.
Background
The insulated cable is widely used in a power distribution network, after the cable is put into operation, besides the influence of overcurrent, overvoltage and laying temperature on the insulating performance of the cable, water as an electrolyte also has a non-negligible influence on the insulating performance of the cable, for example, a cable terminal is leaked outdoors, rainwater slowly permeates into the cable through a connecting terminal of the cable to be accumulated in the cable, part of the electrolyte is accumulated in an inner sheath filling layer of the cable, and part of the electrolyte is accumulated in a cable core, when the water flows to the cable terminal and an intermediate joint, a water branch phenomenon is formed at a weak place of the cable core under the action of a strong electric field, so that the dielectric loss of the cable is increased, the insulating performance is reduced, and most of reasons of cable faults are the water branch phenomenon.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a cable dehumidification device, which adopts heated nitrogen to inflate a cable sheath and a cable core to dehumidify, so as to realize the effect of dehumidifying and dehumidifying the cable inner sheath and the cable core.
The embodiment of the invention provides cable dehumidification equipment which comprises a nitrogen source, a nitrogen heating device, an inflation head and a variable multi-component gas box; the nitrogen source with nitrogen heating device's input is connected, nitrogen heating device's output respectively with aerify the head with one become many divide the gas box and be connected, it connects the oversheath of waiting to dehumidify the cable to aerify the head, one becomes many divide the gas box to connect the sinle silk sheath of waiting to dehumidify the cable.
Further, the nitrogen source is connected with the input end of the nitrogen heating device by a high-pressure hose, and the joint is tied up by a hose clamp; the output end of the nitrogen heating device is connected with the inflation head and the one-to-many gas distribution box through a pipe fitting tee joint.
Further, the inflation head is connected with the outer sheath of the cable to be dehumidified, and the one-to-many air distribution box is connected with the core sheath of the cable to be dehumidified by adopting a sealing structure: the sealing structure comprises a connecting pipe with external threads, a round rubber ring, a convex pressing pad and iron with internal threadsThe connecting pipe with external threads is connected with the iron with internal threads through the round rubber ring and the convex pressing pad>And the circular rubber ring is connected with the connecting pipe with external threads in a pressing mode, and the convex pressing pad is arranged on the circular rubber ring.
Further, the nitrogen source is a nitrogen cylinder or a nitrogen generator.
Further, the nitrogen heating device comprises a nitrogen heating cavity, a U heating rod and a temperature control switch; the U heating rod is arranged in the nitrogen heating cavity, the temperature control switch is arranged outside the nitrogen heating cavity, and the temperature control switch is connected with the U heating rod; the nitrogen heating cavity comprises a front port and a rear port, the front port of the nitrogen heating cavity is connected with the nitrogen source, and the rear port of the nitrogen heating cavity is respectively connected with the inflation head and the one-to-many gas distribution box.
Further, the inflation head is manufactured by adopting a seamless welding process and comprises a front port and a rear port, the front port of the inflation head is connected with the nitrogen heating device, and the rear port of the inflation head is connected with the outer sheath of the cable to be dehumidified.
Further, the variable multi-component air box is manufactured by adopting a seamless welding process and comprises a front port and a plurality of branch ports, the front port of the variable multi-component air box is connected with the nitrogen heating device, each branch port of the variable multi-component air box is provided with an air valve, and each branch port of the variable multi-component air box is respectively connected with the wire core sheath of the cable to be dehumidified.
Further, the cable dehumidification device further comprises an air pressure valve, wherein the air pressure valve comprises a main air pressure valve, a first branch air pressure valve and a second branch air pressure valve; one end of the main air pressure valve is connected with the nitrogen source, and the other end of the main air pressure valve is connected with the input end of the nitrogen heating device; one end of the first branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the first branch air pressure valve is connected with the inflation head; one end of the second branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the second branch air pressure valve is connected with the one-to-many air distribution box.
The cable dehumidification device provided by the embodiment of the invention has the beneficial effects that: compared with the prior art, the invention adopts the heated dry nitrogen, has obvious effect of discharging the moisture in the cable sheath and the wire core, can rapidly and effectively remove moisture and humidity in the cable inner sheath and the wire core, has simple equipment, can be operated by a single person, and saves the labor cost; the inflatable head and the one-to-many gas distribution box can be used for repairing, recycling and saving the resource cost.
Further, the nitrogen heating device further comprises a leakage protector, and the leakage protector is connected with the temperature control switch.
Further, the temperature control switch comprises a thermocouple and a relay, wherein the thermocouple is connected with a coil of the relay, and the U heating rod is connected with a normally open switch of the relay.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a cable dehumidifying apparatus according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of each component of the complete operation of the cable dehumidifying device according to the embodiment of the present invention;
FIG. 3 is an expanded schematic view of a sealing structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a seal structure according to an embodiment of the present invention;
FIG. 5 is an electrical schematic diagram of a nitrogen heating device according to an embodiment of the present invention;
fig. 6 is a schematic diagram showing connection of components of a cable dehumidifying apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a cable dehumidification device, as shown in fig. 1, the structure schematic diagram of the cable dehumidification device provided by the invention comprises a nitrogen source 101, a nitrogen heating device 102, an inflating head 103 and a variable multi-gas distribution box 104, wherein a dehumidification operation target of the cable dehumidification device comprises a cable outer sheath 105 and a cable core sheath 106; the nitrogen source 101 is connected with the input end of the nitrogen heating device 102, and the output end of the nitrogen heating device 102 is respectively connected with the inflation head 103 and the one-to-many gas distribution box 104; the inflation head 103 is connected with the cable outer sheath 105, and the one-to-many gas distribution box 104 is connected with the cable core sheath 106.
The invention adopts the heated dry nitrogen, has obvious effect of discharging the moisture in the cable sheath and the wire core, can rapidly and effectively remove moisture and humidity in the cable inner sheath and the wire core, has simple equipment, can be operated by a single person, and saves labor cost; the inflatable head and the one-to-many gas distribution box can be used for repairing, recycling and saving the resource cost.
Further, the nitrogen source (nitrogen bottle) 107 is connected with the input end of the nitrogen heating device 102 by a high-pressure hose, and the connection part is tied up by a hose clamp; the output end of the nitrogen heating device 102 is connected with the inflating head 103 and the one-to-many gas distributing box 104 through a pipe tee 109.
As shown in fig. 2, the connection schematic diagram of each component of the complete operation of the cable dehumidifying apparatus provided by the embodiment of the invention includes a nitrogen bottle 107, an air inlet hose 108, a nitrogen heating device 102, a tee joint 109, an air outlet hose a 110, an air outlet hose b 111, an air charging head 103, a variable multi-component air box 104, a cable outer sheath 105 to be dehumidified and a cable core sheath 106 to be dehumidified; the air inlet hose 108, the air outlet hose a 110 and the air outlet hose b 111 are high-pressure hoses; the nitrogen gas heating device 102 heats nitrogen gas output from the nitrogen gas cylinder 107 communicated via the gas inlet hose 108; the tee 109 is connected with the input end of the nitrogen heating device 102, the first air outlet hose 110 and the second air outlet hose 111; the air outlet hose A110 is connected with the air charging head 103, the air charging head 103 is connected with the cable core sheath 105 to be dehumidified, the one-to-many air distribution box 104 is connected with the cable core sheath 106 to be dehumidified, and the air charging head 103 and the one-to-many air distribution box 104 are connected with the cable core sheath 105 to be dehumidified and the cable core sheath 106 to be dehumidified by adopting a sealing structure 112.
Further, as shown in fig. 3, an expanded schematic view of a sealing structure of the cable dehumidifying apparatus according to the embodiment of the present invention is provided; fig. 4 is a schematic sectional view of a sealing structure of a cable dehumidifying apparatus according to an embodiment of the present invention; the original screwing type sealing structure comprises a connecting pipe 201 with external threads, three circular rubber rings 202, a convex pressing pad 203 and iron with internal threads204; the plurality of circular rubber rings 202 are pressed into the connecting pipe 201 with external threads, the convex pressing pad 203 is pressed on the three circular rubber rings 202 to fix the axial positions of the three circular rubber rings 202, and the iron with internal threads is->204 are screwed into the connecting pipe 201 with external threads, and are gradually screwed into the connecting pipe to be fastened, the convex pressing pad is axially pressed down, and the three circular rubber rings 202 are pressed down, so that the three circular rubber rings 202 are axially contracted and radially expanded.
Further, the cable dehumidification equipment is required to be subjected to airtight detection after connection and before operation, so that the airtight performance is ensured. And in the airtight detection test, a normal-temperature nitrogen source is adopted to charge high-pressure nitrogen into the channel of the cable dehumidification equipment in a closed connection state, and an electronic barometer is used for testing. Filling nitrogen gas with the pressure not higher than 0.6 MPa, stabilizing for 4 minutes, and recording the value, wherein the pressure gauge number is not lower than 0.5 MPa; after a further 5 minutes of time, the difference between the value obtained after the drop in the barometric pressure indication and the recorded value must be less than 98 Pa.
Further, the nitrogen source is a nitrogen cylinder or a nitrogen generator. The embodiment of the cable dehumidification equipment provided by the invention adopts a nitrogen cylinder.
Further, the nitrogen heating device comprises a nitrogen heating cavity, a U heating rod and a temperature control switch; the U heating rod is arranged in the nitrogen heating cavity, the temperature control switch is arranged above the nitrogen heating cavity, and the temperature control switch is connected with the U heating rod; the nitrogen heating cavity is a high-temperature and high-pressure resistant airtight cavity and is provided with a front port and a rear port, the front port of the nitrogen heating cavity is connected with the nitrogen source, and the rear port of the nitrogen heating cavity is respectively connected with the inflation head and the one-to-many gas distribution box through a pipe tee joint.
Further, the cable dehumidification device further comprises a leakage protector, and the leakage protector is connected with the temperature control switch.
Further, the temperature control switch comprises a thermocouple and a relay, wherein the thermocouple is connected with the relay coil, and the U heating rod is connected with the normally open switch of the relay.
Further, fig. 5 is an electrical schematic diagram of a nitrogen heating device according to an embodiment of the present invention. The power supply interface of the nitrogen heating device is connected with 220V alternating current mains supply, and the power supply input end is connected with a leakage protection switch QF; the digital display thermometer monitors and displays the thermocouple temperature in real time; the thermocouple senses the temperature of the heated nitrogen, is connected with a relay KM control coil in series, and a switch SB controls on-off; the two ends of the heating nitrogen of the U heating rod are connected with a power supply through a normally open switch of a relay KM; the indicator lamp and the normally closed switch of the relay KM are connected in series to be connected with a power supply.
Further, the temperature control heating device is arranged in the nitrogen heating cavity by the U heating rod to heat nitrogen, and the digital display thermometer displays the temperature of the nitrogen in the nitrogen heating device. The relay KM is used as a temperature control switch to cooperate with the thermocouple to keep the internal temperature of the nitrogen heating device constant. The switch SB is closed, the coil of the relay KM is powered on, two normally open switches of the relay KM are closed, the U heating rod works to heat nitrogen, and the thermocouple continuously heats up; the normally closed switch of the relay KM is disconnected, and the indicator lamp is not lighted; the temperature of the heated nitrogen reaches a set temperature, the heated reverse potential difference of the thermocouple is large enough, the reverse potential difference at two ends of a coil of the relay KM is increased, the coil is powered off, two normally open switches of the relay KM are disconnected, the U heating rod is powered off to stop working, a normally closed switch of the relay KM is closed and is conducted, and the indicator lamp is on; the nitrogen temperature gradually, the reverse potential difference of thermocouple descends, relay KM coil is the power on again, two normally open switch of relay KM are closed again, the work of U heating rod continues the heating nitrogen gas, relay KM normally closed switch breaks off once more, the pilot lamp goes out.
Further, the inflation head is manufactured by adopting a seamless welding process, the inflation head comprises a front port and a rear port, the front port of the inflation head is connected with the rear port of the nitrogen heating cavity through a pipe fitting tee joint, the pipe fitting tee joint is connected with the rear port of the nitrogen heating cavity through a pipe fitting core supplementing, the front port of the inflation head is connected with the pipe fitting tee joint through a high-pressure hose, and the joint of the high-pressure hose, the front port of the inflation head and the tee joint pipe fitting is fastened by a throat hoop; the rear port of the inflation head is connected with the cable outer sheath, namely the rear port of the inflation head is a connecting pipe of the sealing structure.
Further, the one-to-many gas distribution box is manufactured by adopting a seamless welding process, the one-to-many gas distribution box comprises a front port and a plurality of branch ports, the front port of the one-to-many gas distribution box is connected with the rear port of the nitrogen heating cavity through a pipe fitting tee joint, the pipe fitting tee joint is connected with the rear port of the nitrogen heating cavity through a pipe fitting core supplementing, the front port of the one-to-many gas distribution box is connected with the pipe fitting tee joint through a high-pressure hose, and the joint of the high-pressure hose, the front port of the one-to-many gas distribution box and the tee joint pipe fitting is fastened by using a throat hoop; the branch ports of the one-to-many gas distribution boxes are all provided with a gas valve, the number of the gas valves of the branch ports of the one-to-many gas distribution boxes is adjusted according to the number of the detection cable cores, and the branch ports of the one-to-many gas distribution boxes are connected with the cable core sheath, namely, each branch port of the one-to-many gas distribution box is a connecting pipe of the sealing structure.
Further, the cable dehumidification device further comprises an air pressure valve, wherein the air pressure valve comprises a main air pressure valve, a first branch air pressure valve and a second branch air pressure valve; one end of the main air pressure valve is connected with the nitrogen source, and the other end of the main air pressure valve is connected with the input end of the nitrogen heating device; one end of the first branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the first branch air pressure valve is connected with the inflation head; one end of the second branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the second branch air pressure valve is connected with the one-to-many air distribution box.
Further, referring to fig. 6, a schematic connection diagram of each component of the complete operation of the cable dehumidifying apparatus according to another embodiment of the present invention includes a nitrogen bottle 107, a main air pressure valve F1, an air inlet hose 108, a nitrogen heating device 102, a tee joint 109, an air outlet hose a 110, an air outlet hose b 111, a branch air pressure valve F2, a branch air pressure valve F3, an air charging head 103, a variable multi-component air box 104, a cable outer sheath 105 to be dehumidified, and a cable core sheath 106 to be dehumidified; the air inlet hose 108, the air outlet hose a 110 and the air outlet hose b 111 are high-pressure hoses; the nitrogen heating device 102 heats nitrogen output by the nitrogen cylinder 107 communicated with the air inlet hose 108, and the main air pressure valve F1 controls the on-off of the nitrogen; the tee joint 109 is connected with the output end of the nitrogen heating device 102, the branch air pressure valve F2 and the branch air pressure valve F3; the branch air pressure valve F2 is connected with the air outlet hose A110, the air outlet hose A110 is connected with the air charging head 103, and the air charging head 103 is connected with the cable outer sheath 105 to be dehumidified; the branch air pressure valve F3 is connected with the air outlet hose B111, the air outlet hose B111 is connected with the one-to-many air distribution box 104, and the one-to-many air distribution box 104 is connected with the cable core sheath 106 to be dehumidified; and the inflation head 103 and the one-to-many gas distribution box 104 are connected with the cable outer sheath 105 to be dehumidified and the cable core sheath 106 to be dehumidified by adopting a sealing structure 112.
Further, the nitrogen in the cable dehumidifying device requires a constant air pressure of 0.5 mpa during the operation of the dehumidifying cable. The main air pressure valve controls the air pressure of the nitrogen gas cylinder to be input into the nitrogen gas heating device for heating, so that the air pressure of the nitrogen gas is sufficient and proper, and the requirement of continuous drying work in the later stage is met. The two branch air pressure valves are respectively controlled to ensure that the air pressure of nitrogen flowing in the dehumidification cable of the outer sheath and the dehumidification cable of the wire core is constant at 0.5 megapascal.
Further, when the operation of the cable dehumidification equipment is finished, whether the tail gas is dry or not is judged by using a silica gel desiccant to check whether the tail gas is discolored or not.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The cable dehumidification equipment is characterized by comprising a nitrogen source, a nitrogen heating device, an inflation head and a variable multi-component gas box; the nitrogen source is connected with the input end of the nitrogen heating device, the output end of the nitrogen heating device is respectively connected with the inflation head and the one-to-many gas distribution box, the inflation head is connected with the outer sheath of the cable to be dehumidified, and the one-to-many gas distribution box is connected with the core sheath of the cable to be dehumidified; the inflation head is connected with the outer sheath of the cable to be dehumidified, and the one-to-many air distribution box is connected with the wire core sheath of the cable to be dehumidified by adopting a sealing structure: the sealing structure comprises a connecting pipe with external threads, a round rubber ring, a convex pressing pad and iron with internal threadsThe connecting pipe with external threads passes through the circular glueRing and said male pressure pad and said internally threaded iron>The connection, circular rubber ring impress the connecting pipe of external screw thread, the convex pressure pad sets up on circular rubber ring, the less partial lateral wall of convex pressure pad diameter prop circular rubber ring with between the sinle silk sheath.
2. The cable dehumidification apparatus of claim 1, wherein the nitrogen source is connected to an input end of the nitrogen heating device by a high pressure hose, and the connection is tightened by a hose clamp; the output end of the nitrogen heating device is connected with the inflation head and the one-to-many gas distribution box through a pipe fitting tee joint.
3. The cable dehumidification apparatus of claim 1, wherein the nitrogen source is a nitrogen cylinder or a nitrogen generator.
4. The cable dehumidification apparatus of claim 1, wherein the nitrogen heating device comprises a nitrogen heating cavity, a U heating rod, and a temperature control switch; the U heating rod is arranged in the nitrogen heating cavity, the temperature control switch is arranged outside the nitrogen heating cavity, and the temperature control switch is connected with the U heating rod; the nitrogen heating cavity comprises a front port and a rear port, the front port of the nitrogen heating cavity is connected with the nitrogen source, and the rear port of the nitrogen heating cavity is respectively connected with the inflation head and the one-to-many gas distribution box.
5. The cable dehumidification apparatus of claim 4, wherein the nitrogen heating apparatus further comprises a leakage protector connected to the temperature controlled switch.
6. The cable dehumidification apparatus of claim 4, wherein the temperature controlled switch comprises a thermocouple and a relay, the thermocouple being connected to a coil of the relay, the U-heating rod being connected to a normally open switch of the relay.
7. The cable dehumidification apparatus of claim 1, wherein the inflation head is manufactured using a seamless welding process, the inflation head comprises a front port and a rear port, the front port of the inflation head is connected with the nitrogen heating device, and the rear port of the inflation head is connected with an outer sheath of the cable to be dehumidified.
8. The cable dehumidification device as set forth in claim 1, wherein the one-to-many gas distribution box is made by a seamless welding process, the one-to-many gas distribution box comprises a front port and a plurality of branch ports, the front port of the one-to-many gas distribution box is connected with the nitrogen heating device, each branch port of the one-to-many gas distribution box is provided with a gas valve, and each branch port of the one-to-many gas distribution box is connected with a core sheath of the cable to be dehumidified.
9. The cable dehumidification apparatus of claim 1, further comprising a pneumatic valve comprising a main pneumatic valve, a first branch pneumatic valve, and a second branch pneumatic valve; one end of the main air pressure valve is connected with the nitrogen source, and the other end of the main air pressure valve is connected with the input end of the nitrogen heating device; one end of the first branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the first branch air pressure valve is connected with the inflation head; one end of the second branch air pressure valve is connected with the output end of the nitrogen heating device, and the other end of the second branch air pressure valve is connected with the one-to-many air distribution box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710954975.1A CN107514900B (en) | 2017-10-13 | 2017-10-13 | Cable dehumidification equipment |
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|---|---|---|---|
| CN201710954975.1A CN107514900B (en) | 2017-10-13 | 2017-10-13 | Cable dehumidification equipment |
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| CN107514900A CN107514900A (en) | 2017-12-26 |
| CN107514900B true CN107514900B (en) | 2023-11-07 |
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