CN112848266B - Cable production cooling method - Google Patents
Cable production cooling method Download PDFInfo
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- CN112848266B CN112848266B CN202110296416.2A CN202110296416A CN112848266B CN 112848266 B CN112848266 B CN 112848266B CN 202110296416 A CN202110296416 A CN 202110296416A CN 112848266 B CN112848266 B CN 112848266B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0004—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1658—Cooling using gas
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Abstract
The invention discloses a cable production cooling method in the cable field, which comprises the following steps that A, the wire and cable which are molded by extrusion molding are subjected to dynamic constant-temperature water cooling in a first water cooling unit, the dynamic constant-temperature water cooling step comprises a water flow control step of automatically regulating and controlling the cooling water flow of the first water cooling unit by a water flow control mechanism, and a heating control step of automatically regulating and controlling the heating power of the cooling water of the first water cooling unit by a temperature control mechanism; B. air cooling the wire and cable after water cooling in the first water cooling unit; C. finally cooling the air-cooled wire and cable in a second water cooling unit; D. the wire and cable after final cooling is subjected to surface drying in a drying unit. The invention can solve the problems that the temperature of the first section of water tank is not controlled and the cooling quality of the electric wire and the cable is not stable in the existing slow cooling technology.
Description
Technical Field
The invention relates to the field of cable production, in particular to a cable production cooling method.
Background
The molded electric wire and cable in the production process of the electric wire and cable is cooled and shaped immediately after leaving the head of the extruder, otherwise, the electric wire and cable deforms under the action of gravity. The cooling method generally adopts water cooling, and the cooling method is divided into rapid cooling and slow cooling according to different water temperatures. The rapid cooling is direct cold water cooling, the rapid cooling has strong shaping effect on the plastic extrusion coating, but for the crystalline polymer, internal stress is easy to remain in the structure of the extrusion coating due to the rapid heat cooling, and the wire and the cable are cracked in the using process. The slow cooling is to reduce the internal stress of the product, and water with different temperatures is placed in the cooling water tank in sections to gradually cool and shape the product. The first section water tank of the sectional type cooling water tank commonly used at present is that the cooling water circulation speed is reduced, the waste heat of the plastic extrusion coating of the electric wire and the cable is used for heating the cooling water to a certain extent, and the influence of sudden heat cooling on the product quality is avoided. But the specific water temperature in the first section of water tank can not be known, and the water flow speed is changed only by the experience of operators, the temperature is not controlled, and the cooling and shaping quality of the product is not stable.
Disclosure of Invention
The invention aims to provide a cable production cooling method to solve the problems that the temperature of a first section of water tank is not controlled and the cooling quality of wires and cables is unstable in the existing slow cooling technology.
In order to achieve the purpose, the basic technical scheme of the invention is as follows: a cable production cooling method comprising the steps of:
A. carrying out dynamic constant-temperature water cooling on the wire and cable subjected to extrusion molding in a first water cooling unit, wherein the dynamic constant-temperature water cooling step comprises a water flow control step of automatically regulating and controlling the cooling water flow of the first water cooling unit by using a water flow control mechanism and a heating control step of automatically regulating and controlling the heating power of the cooling water of the first water cooling unit by using a temperature control mechanism;
B. air cooling the wire and cable after water cooling in the first water cooling unit;
C. finally cooling the air-cooled wire and cable in a second water cooling unit;
D. the wire and cable after final cooling is subjected to surface drying in a drying unit.
The principle and the advantages of the scheme are as follows: in practical application, the first water cooling unit is a first cooling and shaping process after the electric wire and the cable are molded from the extruding machine, the cooling water is kept in a relatively constant temperature range by combining the control of the circulating flow of the cooling water with the control of the heating power of the cooling water, the temperature of the electric wire and the electric cable is reduced after the electric wire and the electric wire enter the first water cooling unit, the temperature difference is small, the internal cooling of the plastic coating layer of the electric wire and the electric cable is uniform, no internal stress is generated, the heat of the electric wire and the electric cable is transferred to the cooling water in the continuous cooling process, the cooling water is cooled by automatically adjusting the cooling water flow and the heating power when the cooling water temperature is increased to exceed the constant temperature range and the cooling and shaping effects of the electric wire and the electric cable are reduced, the cooling water flow and the heating power are automatically adjusted after the temperature is reduced to exceed the constant temperature range, the cooling water temperature is kept in the constant range, and the plastic coating layer of the electric wire and the electric cable can be reliably cooled and shaped without residual internal stress in the plastic coating layer due to shock. After cooling and shaping, air cooling is performed, so that the cooling speed of the electric wire and the electric cable can be alleviated, the electric wire and the electric cable are cooled and shaped stably, and the generation of internal stress is further avoided. And finally cooling by water cooling to cool the electric wire and cable to a stable state, and drying the surface of the electric wire and cable after final cooling so that the electric wire and cable can be directly wound and stored.
And the water flow control step in the step A comprises the step of controlling the water control part on the water inlet pipe of the first water cooling unit by using the first electromagnet connected with the negative temperature coefficient thermistor in series to adjust the flow of cooling water in the heating circulation and the cooling circulation.
Negative temperature coefficient thermistor is arranged in the cooling water temperature of perception in the first water-cooling unit and converts resistance signal into, and then turns into the action of the magnetic force change control accuse water spare of first electro-magnet, can be according to the temperature variation automatically regulated cooling water's of cooling water circulation flow, and then the cooling water temperature in the automatically regulated first water-cooling unit to invariable temperature range, and the guarantee electric wire and cable cooling is stereotyped reliable and stable.
And the heating control step in the step A comprises the step of adjusting the heating power of the electric heating block on the first water cooling unit in the temperature rising cycle and the temperature lowering cycle by using the second electromagnet connected with the positive temperature coefficient thermistor in series.
The positive temperature coefficient thermistor is used for sensing the temperature of cooling water in the first water cooling unit and converting the temperature of the cooling water into a resistance signal, and then converting the signal into a magnetic force change control temperature control part of the second electromagnet to act, and the heating power of the electric heating block to the cooling water in the first water cooling unit can be automatically adjusted according to the temperature change of the cooling water, so that the heating temperature of the cooling water in the first water cooling unit is automatically controlled.
Furthermore, the water control piece comprises a first sealing block fixed at the end part of the water inlet pipe, a second sealing block is rotatably connected on the first sealing block, gaps are respectively arranged on the first sealing block and the second sealing block, a transmission part is connected between the second sealing block and the first electromagnet, the control of the heating circulation to the cooling water circulation flow is that the cooling water temperature is reduced so that the resistance value of the negative temperature coefficient thermistor is increased, the magnetic force of the first electromagnet is reduced, the transmission part drives the second sealing block to rotate relative to the first sealing block, the overlapping area of the gap on the second sealing block and the first sealing block is reduced, the cooling water circulation flow is reduced, the control of the cooling circulation to the cooling water circulation flow is that the cooling water temperature is increased so that the resistance value of the negative temperature coefficient thermistor is reduced, and the magnetic force of the first electromagnet is increased so that the second sealing block is driven to rotate relative to the first sealing block by the transmission part, the overlapping area of the gaps on the second sealing block and the first sealing block is increased, and the circulating flow of cooling water is increased.
As preferably like this first sealed piece as the mounting, the second sealed piece is as rotatory moving part, and the breach on the two supplies the circulating water to flow between first cooling tower and first basin, and first sealed piece and second sealed piece form adjusting valve, and the magnetic force of first electro-magnet changes the action of turning into the second sealed piece through the driving medium and realizes the regulation control to the circulating water flow, and the structure is succinct like this, and is reliable effective to the control of circulating water flow. And the circulation volume of the cooling water is reduced in the temperature rise circulation process, so that the temperature of the cooling water in the first water cooling unit is gradually increased, the circulation volume of the cooling water is increased in the temperature reduction circulation process, the flowing circulation of the cooling water in the first water cooling unit is accelerated, and the temperature is gradually reduced.
Further, the transmission part comprises a first iron block, a spring is connected between the first iron block and the first electromagnet, a rack is arranged on the first iron block, and a gear meshed with the rack is fixed on the second sealing block.
The linkage between the first electromagnet and the first iron block is realized through attracting magnetic force preferentially, the change of the temperature in the first water tank is converted into the displacement of the first iron block through the magnetic force, the second sealing block is driven to act through the transmission of the rack and the gear to control the flow of circulating water, and the spring is used as a buffering reset piece of the first iron block, so that the first iron block acts stably, can be adjusted and reset automatically in the temperature change process, and accurately controls the flow of the circulating water.
Furthermore, accuse temperature piece includes first magnet, is connected with the spring between first magnet and the second electro-magnet, and first magnet repels the setting with the second electro-magnet mutually, and first magnet insulation is connected with resistance coil, and sliding connection has the gleitbretter on the resistance coil, and resistance coil and gleitbretter are established ties in the circuit of electrical heating piece.
Preferably like this through repelling magnetic force realize the linkage between second electro-magnet and the first magnet, pass through the displacement of magnetic force transformation first magnet with the change of temperature in the first basin, first magnet drives resistance coil and moves for the gleitbretter relatively, and then makes resistance change in the heating block circuit, the sensitive heating degree of adjusting the heating block.
Further, the heating power of the electric heating block is controlled by the temperature rising cycle, namely the temperature of cooling water is reduced, so that the resistance value of the positive temperature coefficient thermistor is reduced, the magnetic force of the second electromagnet is increased, the first magnet is repelled and pushed away, the resistance value of a resistance coil connected to a circuit of the electric heating block is reduced, the current of the electric heating block is increased, and the heating power is increased; the temperature reduction circulation controls the heating power of the electric heating block to increase the temperature of cooling water so as to increase the resistance value of the positive temperature coefficient thermistor, the magnetic force of the second electromagnet is reduced, the first magnet is pulled by the spring, the resistance value of the resistor coil connected to the circuit of the electric heating block is increased, the current of the electric heating block is reduced, and the heating power is reduced.
Therefore, the positive temperature coefficient thermistor can timely and sensitively convert temperature change into heating power adjustment of the electric heating block, and can automatically adjust the heating of cooling water when the temperature is too high or too low, so that the temperature of the cooling water is proper.
And further, performing circumferential air cooling on the electric wire and the cable by using an air cooling unit in the step B, wherein the air cooling speed is 0.5-1 m/s. Circumferential air cooling is preferably adopted to cool the electric wire and the cable uniformly, relatively soft wind power is used for buffering after the electric wire and the cable are subjected to primary water cooling, and circumferential air supply is matched to ensure that all parts of the electric wire and cable plastic coating are cooled uniformly without generating residual internal stress.
And further, performing room-temperature water cooling in the second water cooling unit in the step C. Preferably, after the wire and cable are subjected to preliminary water cooling and air cooling buffer cooling, the plastic coating of the wire and cable is shaped, and the wire and cable can be cooled to room temperature through water cooling at room temperature, so that the plastic coating cooling quality of the wire and cable is guaranteed.
And furthermore, in the step D, the drying unit comprises a wind box and a wiping mechanism, the wind box is positioned above the wiping mechanism, the cable penetrates through the space between the wind box and the wiping mechanism, an air outlet facing the cable is formed in the bottom of the wind box, the air speed of the air outlet is 5-8m/s, the wiping mechanism comprises a motor and a wiping disc, a sheave mechanism is connected between the motor and the wiping disc, wiping cloth is arranged on the periphery of the wiping disc, and an electric heating plate for drying the wiping cloth is arranged below the wiping disc.
As the preferred wire and cable surface after the cooling adheres to more moisture, adopt bellows to weather the moisture on wire and cable surface from last to down with stronger wind-force, also can blow the remaining moisture in surface to the wire and cable lower edge, cooperate wiping cloth to wipe moisture dry again, make wire and cable cooling back surface drying, adopt geneva mechanism transmission to make and wipe the dish intermittent type rotation, and then cooperate the electric heating board can dry absorbed moisture by oneself so that wipe once more, form the automatic cycle, it is more automatic high-efficient to wire and cable's cool drying.
Drawings
FIG. 1 is a schematic front view of a cable production cooling apparatus according to an embodiment of the present invention;
FIG. 2 is a front view of a water control element of a cable production cooling apparatus in an embodiment of the present invention;
FIG. 3 is a left side view of a transmission member of the cable production cooling apparatus in an embodiment of the present invention;
FIG. 4 is a left side view of the temperature control mechanism of the cable production cooling apparatus in an embodiment of the present invention;
fig. 5 is an elevation view of a sheave mechanism of a cable production cooling device in an embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a first cooling tower 1, a first water tank 2, a positive temperature coefficient thermistor 3, a negative temperature coefficient thermistor 4, an electric heating block 5, an air cooling unit 6, an electric wire 7, a second water cooling unit 8, an air drying mechanism 9, a double-shaft motor 10, a sheave mechanism 11, a wiping disc 12, an electric heating plate 13, a dial 14, a sheave 15, a rotating shaft 16, a water inlet pipe 17, a first sealing block 18, a second sealing block 19, a gear 191, a first iron block 20, a rack 201, a first electromagnet 21, a second electromagnet 22, a resistance coil 23, a first magnet 24, a sliding sheet 25, a first electric wire 26 and a second electric wire 27.
A. carrying out dynamic constant temperature water cooling on the wire and cable subjected to extrusion molding in a first water cooling unit, wherein the temperature of the dynamic constant temperature water cooling is maintained at 55-70 ℃, and the dynamic constant temperature water cooling step comprises a water flow control step of automatically regulating and controlling the cooling water flow of the first water cooling unit by using a water flow control mechanism and a heating control step of automatically regulating and controlling the heating power of the cooling water of the first water cooling unit by using a temperature control mechanism;
B. carrying out air cooling on the wire and cable subjected to water cooling in the first water cooling unit, and carrying out circumferential air cooling on the wire and cable by using an air cooling unit, wherein the air cooling speed is 0.5-1 m/s;
C. carrying out final cooling on the wire and cable subjected to air cooling in a second water cooling unit, wherein the final cooling adopts room temperature water cooling;
D. the electric wire and cable after final cooling are subjected to surface drying in the drying unit, the drying unit comprises an air box and a wiping mechanism, the air box is located above the wiping mechanism, the cable penetrates through the space between the air box and the wiping mechanism, an air outlet facing the cable is formed in the bottom of the air box, the air speed of the air outlet is 5-8m/s, the wiping mechanism comprises a motor and a wiping disc, a sheave mechanism is connected between the motor and the wiping disc, wiping cloth is arranged on the periphery of the wiping disc, and an electric heating plate for drying the wiping cloth is arranged below the wiping disc.
And the water flow control step in the step A comprises the step of controlling a water control piece on a water inlet pipe of the first water cooling unit by using a first electromagnet connected with a negative temperature coefficient thermistor in series to adjust the flow of cooling water in the temperature rising circulation and the temperature reducing circulation. The heating control step comprises the step of controlling the heating power of an electric heating block on the first water cooling unit in heating circulation and cooling circulation by using a second electromagnet adjusting temperature control piece connected with a positive temperature coefficient thermistor in series.
The control of the heating circulation to the cooling water circulation flow is that the cooling water temperature is reduced to enable the resistance of the negative temperature coefficient thermistor to rise, the magnetic force of the first electromagnet is reduced to drive the second sealing block to rotate relative to the first sealing block through the transmission piece, the overlapping area of the second sealing block and the gap on the first sealing block is reduced, the cooling water circulation flow is reduced, the control of the cooling circulation to the cooling water circulation flow is that the resistance of the negative temperature coefficient thermistor is reduced due to the rising of the cooling water temperature, the magnetic force of the first electromagnet is increased to drive the second sealing block to rotate relative to the first sealing block through the transmission piece, the overlapping area of the gap on the second sealing block and the first sealing block is increased, and the cooling water circulation flow is increased.
The heating power of the electric heating block is controlled by the temperature rise circulation to be that the temperature of cooling water is reduced, so that the resistance value of the positive temperature coefficient thermistor is reduced, the magnetic force of the second electromagnet is increased, the first magnet is repelled and pushed away, the resistance value of a resistance coil connected to a circuit of the electric heating block is reduced, the current of the electric heating block is increased, and the heating power is increased; the temperature reduction circulation controls the heating power of the electric heating block to increase the temperature of cooling water so as to increase the resistance value of the positive temperature coefficient thermistor, the magnetic force of the second electromagnet is reduced, the first magnet is pulled by the spring, the resistance value of the resistor coil connected to the circuit of the electric heating block is increased, the current of the electric heating block is reduced, and the heating power is reduced.
The embodiment also provides a cable production cooling device adopting the cable production cooling method, which is basically as shown in the attached figure 1: including first water-cooling unit, first water-cooling unit includes first basin 2 and first cooling tower 1, and the inlet tube 17 and the 2 intercommunications of first basin of first cooling tower 1, first basin 2 are connected with electrical heating piece 5, current control mechanism and temperature control mechanism. The water flow control mechanism comprises a water control piece and a first electromagnet 21 connected with a negative temperature coefficient thermistor 4 in series in a power supply loop, and the negative temperature coefficient thermistor 4 is inserted into the first water tank 2. Combine fig. 2 to show, accuse water spare is connected between first electro-magnet 21 and inlet tube 17, and accuse water spare is including fixing the first sealed piece 18 of circular shape at the inlet tube 17 tip, and coaxial rotation is connected with the sealed piece 19 of circular shape second on the first sealed piece 18, all is equipped with the breach on first sealed piece 18 and the sealed piece 19 of second, is connected with the driving medium between the sealed piece 19 of second and the first electro-magnet 21. Referring to fig. 3, the transmission member includes a first iron block 20, a spring is bonded between the first iron block 20 and the first electromagnet 21, a rack 201 is integrally formed on the first iron block 20, and a gear 191 engaged with the rack 201 is coaxially and integrally formed on the second sealing block 19.
Referring to fig. 4, the temperature control mechanism includes a temperature control member and a second electromagnet 22 connected in series to the power supply circuit with a ptc thermistor 3, and the ptc thermistor 3 is inserted into the first water tank 2. The temperature control piece is connected between the second electromagnet 22 and the heating block and comprises a first magnet 24, a spring is bonded between the first magnet 24 and the second electromagnet 22, the first magnet 24 and the electrified second electromagnet 22 are arranged in a repelling mode, and the temperature control piece is specifically realized by adjusting the coil current direction of the second electromagnet 22. The first magnet 24 is adhered with a resistance coil 23 through an insulating rod, the end part of the resistance coil 23 close to the first magnet 24 is connected with a first electric wire 26, the resistance coil 23 is connected with a sliding piece 25 in a sliding way, the sliding piece 25 is connected with a second electric wire 27, the first electric wire 26 and the second electric wire 27 connect the resistance coil 23 and the sliding piece 25 in series in the circuit of the electric heating block 5, and thus the resistance coil 23 and the sliding piece 25 form a sliding rheostat connected in series in the circuit of the electric heating block 5.
As shown in fig. 1, the drying device further comprises a drying unit, the drying unit comprises a drying mechanism 9 and a wiping mechanism, the drying mechanism 9 is located above the wiping mechanism, the cable penetrates through the drying mechanism 9 and the wiping mechanism, and an air outlet facing the cable is formed in the bottom of the drying mechanism 9. Referring to fig. 5, the wiping mechanism includes a dual-shaft motor 10 and a wiping tray 12, a sheave mechanism 11 is connected between the dual-shaft motor 10 and the wiping tray 12, a rotating shaft 16 of the dual-shaft motor 10 is connected with a sheave 15 of the sheave mechanism 11, the wiping tray 12 is coaxially connected with a driving plate 14 of the sheave mechanism 11, wiping cloth is bonded to the periphery of the wiping tray 12, and a heating member for drying the wiping cloth is disposed on the outer side of the wiping tray 12. The heating member is an electric heating plate 13 positioned below the wiping disc 12, the air drying mechanism 9 comprises an air box, the bottom of the air box is provided with an exhaust pipe and an air outlet facing the cable, and the exhaust pipe faces the peripheral surface of the wiping disc 12.
As shown in fig. 1, a second water cooling unit 8 is further disposed between the first water cooling unit and the drying unit, the second water cooling unit 8 is a second water tank containing cold water at room temperature, and the second water tank is communicated with a second cooling tower. An air cooling unit 6 is further arranged between the first water cooling unit and the second water cooling unit 8, the air cooling unit 6 is a cooling air box, and a plurality of air outlets facing the electric wires and cables 7 are formed in the cooling air box.
The specific implementation process is as follows: the electric wire 7 is extruded from the extruder and then drawn into the first water tank 2, cooling water circulates between the first water tank 2 and the first cooling tower 1, and the electric heating block 5 heats the cooling water in the first water tank 2 so as to avoid cracking caused by the fact that the plastic extrusion layer of the electric wire 7 extruded from the extruder suddenly contacts with the cooling water with large temperature difference to generate residual stress inside. The cooling water in the first water tank 2 needs to be kept in a relatively stable temperature range, but the temperature of the electric wire 7 extruded from the extruder is much higher than that of the cooling water in the first water tank 2, so that the temperature in the first water tank 2 is continuously increased in the continuous use process, and the shaping and cooling quality of the plastic extrusion layer is reduced.
Under normal conditions, before cooling the electric wire 7, the temperature in the first water tank 2 is a suitable temperature, the rack 201 is meshed with the gear 191, the gap parts on the first sealing block 18 and the second sealing block 19 coincide, the current of the second electromagnet 22 is stable, the resistance value of the resistance coil 23 connected to the circuit of the electric heating block 5 is stable, the current of the electric heating block 5 is stable, the heating of the electric heating block 5 to the cooling water and the circulation of the cooling water are kept balanced, and the temperature in the first water tank 2 is kept stable. In the present embodiment, the negative temperature coefficient thermistor 4 and the positive temperature coefficient thermistor 3 are configured to detect the temperature in the first water tank 2. After the electric wire 7 enters the first water tank 2, the temperature of the electric wire 7 just extruded from the extruding machine is higher than that of the cooling water in the first water tank 2, so that the temperature of the cooling water in the first water tank 2 is increased, the resistance value of the negative temperature coefficient thermistor 4 is reduced, the current of the first electromagnet 21 is increased, the magnetic force of the first electromagnet 21 is enhanced, the first electromagnet 21 attracts the first iron block 20, the rack 201 on the first iron block 20 drives the gear 191 to rotate, the gear 191 drives the second sealing block 19 to rotate relative to the first sealing block 18, the overlapping area of the gap between the second sealing block 19 and the first sealing block 18 is increased, the circulation flow of the cooling water between the first water tank 2 and the first cooling tower 1 is increased, the circulating is the cold water in the first cooling tower 1, and the cooling water in the first water tank 2 is cooled. Meanwhile, the resistance value of the positive temperature coefficient thermistor 3 is increased, the current of the second electromagnet 22 is reduced, the magnetic force is weakened, the repulsive force of the second electromagnet 22 to the first magnet 24 is weakened, the first magnet 24 moves towards the second electromagnet 22 under the pulling of the spring, and the insulating rod drives the resistance coil 23 to move together, so that the resistance connected into the circuit of the electric heating block 5 between the resistance coil 23 and the slide piece 25 is increased, the current in the circuit of the electric heating block 5 is reduced, and the heating power of the electric heating block 5 is reduced.
If the temperature of the cooling water in the first water tank 2 is reduced, the resistance value of the negative temperature coefficient thermistor 4 is increased, so that the current of the first electromagnet 21 is reduced, the magnetic force of the first electromagnet 21 is weakened, the first iron block 20 is far away under the pushing of the spring, the gear rack 201 pushes the gear 191, the gear 191 drives the second sealing block 19 to rotate, the overlapped gap is reduced, and the circulating flow of the cooling water is reduced. Meanwhile, the resistance value of the positive temperature coefficient thermistor 3 is reduced, the current of the second electromagnet 22 is increased, the repulsive force to the first magnet 24 is increased, so that the first magnet 24 pushes the resistance coil 23 to move through the insulating rod, the resistance connected into the circuit of the electric heating block 5 between the resistance coil 23 and the slide piece 25 is reduced, the current in the circuit of the electric heating block 5 is increased, the heating power of the electric heating block 5 to the cooling water in the first water tank 2 is increased, and the temperature of the cooling water in the first water tank 2 is increased.
Therefore, after the electric wire and cable 7 enters the first water tank 2, the temperature is sensed and converted into corresponding action trigger signals through the negative temperature coefficient thermistor 4 and the positive temperature coefficient thermistor 3, and the temperature can be autonomously and spontaneously controlled and adjusted when the temperature changes, so that the temperature of the cooling water in the first water tank 2 can be adjusted to be the temperature suitable for cooling and shaping the plastic extrusion layer of the electric wire and cable 7 in real time.
The electric wire and cable 7 which is subjected to dynamic temperature regulation and cooling shaping through the first water tank 2 enters the second water tank, air cooling is carried out through the air cooling unit 6 before entering the second water tank, an air outlet of the cooling air box blows air to the electric wire and cable 7 to transition the cooling speed of the electric wire and cable 7, then the electric wire and cable 7 enters the second water tank, and cold water is directly adopted in the second water tank to carry out final cooling on the electric wire and cable 7. And the cooled electric wire 7 enters a drying unit, and a wind box blows air from top to bottom in the drying unit to blow dry the moisture on the upper surface of the electric wire 7. A double-shaft motor 10 in the wiping mechanism drives a sheave mechanism 11, the sheave mechanism 11 drives a wiping disc 12 to rotate intermittently, and wiping cloth on the wiping disc 12 wipes water on the surface of the electric wire 7 from the lower part. The part of the wiping cloth which absorbs water and is wet rotates above the electric heating plate 13 in the intermittent rotation process of the wiping disc 12, the electric heating plate 13 dries the wet wiping cloth, and the exhaust pipe of the air box dries the dried wiping cloth again and cools down the wiping cloth, so that the wiping cloth can dry the subsequent electric wires and cables 7 again.
The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the invention has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. A cable production cooling method is characterized in that: the method comprises the following steps:
A. carrying out dynamic constant-temperature water cooling on the wire and cable subjected to extrusion molding in a first water cooling unit, wherein the dynamic constant-temperature water cooling step comprises a water flow control step of automatically regulating and controlling the cooling water flow of the first water cooling unit by using a water flow control mechanism and a heating control step of automatically regulating and controlling the heating power of the cooling water of the first water cooling unit by using a temperature control mechanism;
B. air cooling the wire and cable after water cooling in the first water cooling unit;
C. finally cooling the air-cooled wire and cable in a second water cooling unit;
D. drying the surface of the finally cooled electric wire in a drying unit, wherein the drying unit comprises an air drying mechanism and a wiping mechanism, the air drying mechanism is positioned above the wiping mechanism, the electric wire penetrates through the space between the air drying mechanism and the wiping mechanism, and an air outlet facing the electric wire is formed in the bottom of the air drying mechanism; the wiping mechanism comprises a double-shaft motor and a wiping disc, a sheave mechanism is connected between the double-shaft motor and the wiping disc, a rotating shaft of the double-shaft motor is connected with a sheave of the sheave mechanism, the wiping disc is coaxially connected with a driving plate of the sheave mechanism, wiping cloth is bonded on the periphery of the wiping disc, and a heating element for drying the wiping cloth is arranged on the outer side of the wiping disc; the heating member is the electric heating board that is located and cleans dish below, and air drying mechanism includes bellows, and the bellows bottom is equipped with exhaust pipe and the air outlet towards the cable, and the outer peripheral face of dish is cleaned to the exhaust pipe orientation.
2. A cable production cooling method as claimed in claim 1, wherein: the water flow control mechanism comprises a water control piece and a first electromagnet connected with a negative temperature coefficient thermistor in series in a power supply loop, the water control piece is connected between the first electromagnet and the water inlet pipe of the first water cooling unit, and the water flow control step in the step A comprises the step of adjusting the flow of cooling water in heating circulation and cooling circulation by using the water control piece connected with the first electromagnet of the negative temperature coefficient thermistor in series to control the water inlet pipe of the first water cooling unit.
3. A cable production cooling method as claimed in claim 1, wherein: the temperature control mechanism comprises a temperature control piece and a second electromagnet connected with a positive temperature coefficient thermistor in series in a power supply loop, the temperature control piece is connected between the second electromagnet and an electric heating block of the first water cooling unit, and the heating control step in the step A comprises the step of adjusting the temperature control piece by the second electromagnet connected with the positive temperature coefficient thermistor in series to control the heating power of the electric heating block on the first water cooling unit in heating circulation and cooling circulation.
4. A cable production cooling method according to claim 2, wherein: the water control piece comprises a first sealing block fixed at the end part of the water inlet pipe, a second sealing block is rotatably connected onto the first sealing block, gaps are respectively arranged on the first sealing block and the second sealing block, a transmission part is connected between the second sealing block and the first electromagnet, the circulation flow of cooling water is controlled by the temperature rise circulation in such a way that the temperature of the cooling water is reduced, the resistance value of the negative temperature coefficient thermistor is increased, the magnetic force of the first electromagnet is reduced, the second sealing block is driven to rotate relative to the first sealing block by the transmission part, the overlapping area of the gap on the second sealing block and the first sealing block is reduced, the circulation flow of the cooling water is controlled in such a way that the temperature of the cooling water is increased, the resistance value of the negative temperature coefficient thermistor is reduced, and the magnetic force of the first electromagnet is increased, so that the second sealing block is driven to rotate relative to the first sealing block by the transmission part, the overlapping area of the gaps on the second sealing block and the first sealing block is increased, and the circulating flow of cooling water is increased.
5. A cable production cooling method according to claim 4, wherein: the driving medium includes first iron plate, is connected with the spring between first iron plate and the first electro-magnet, is equipped with the rack on the first iron plate, be fixed with the gear with rack toothing on the second sealed piece.
6. A cable production cooling method as claimed in claim 3, wherein: the temperature control piece comprises a first magnet, a spring is connected between the first magnet and the second electromagnet, the first magnet and the second electromagnet are arranged in a repelling mode, the first magnet is connected with a resistance coil in an insulating mode, a sliding sheet is connected to the resistance coil in a sliding mode, and the resistance coil and the sliding sheet are connected in series in a circuit of the electric heating block.
7. A cable production cooling method as claimed in claim 6, wherein: the heating power of the electric heating block is controlled by the temperature rise cycle, namely the temperature of cooling water is reduced, so that the resistance value of the positive temperature coefficient thermistor is reduced, the magnetic force of the second electromagnet is increased, the first magnet is repelled and pushed away, the resistance value of a resistance coil connected to a circuit of the electric heating block is reduced, the current of the electric heating block is increased, and the heating power is increased; the temperature reduction circulation controls the heating power of the electric heating block to increase the temperature of cooling water so as to increase the resistance of the positive temperature coefficient thermistor, the magnetic force of the second electromagnet is reduced, the first magnet is pulled by the spring, the resistance of the resistor coil connected to the circuit of the electric heating block is increased, the current of the electric heating block is reduced, and the heating power is reduced.
8. A cable production cooling method as claimed in claim 7, wherein: and B, carrying out circumferential air cooling on the wires and the cables by using an air cooling unit, wherein the air cooling speed is 0.5-1 m/s.
9. A cable production cooling method as claimed in claim 8, wherein: and C, performing room-temperature water cooling in the second water cooling unit.
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| CN113459467B (en) * | 2021-08-06 | 2022-08-23 | 重庆万桥交通科技发展有限公司 | Extrusion molding cooling device for outer sheaths of stay cables |
| CN113959160A (en) * | 2021-10-25 | 2022-01-21 | 广东亨通光电科技有限公司 | Optical cable production facility zooms out |
| CN116141639B (en) * | 2023-03-17 | 2023-12-26 | 江苏众城线缆有限公司 | Cooling device for production of wire and cable sheath |
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