JP2000314070A - Hot air drying device of warp yarn-sizing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot wind drying device of a warp yarn-sizing machine having a high productivity and energy efficiency, and not causing drying irregularity of the warp yarn. SOLUTION: This device consists of drying chambers 4a, 4b through which hot air passes in reverse direction to the traveling of warp yarns 3 and hot air heating and blowing devices 2a, 2b, and is equipped with 2 systems of hot air circulating and exhausting systems 1a, 1b for circulating the hot air and exhausting a part of it along a warp yarn traveling passage. Each of the drying chambers 4a, 4b of each of the hot air circulating and exhausting systems 1a, 1b in the upstream side and down stream side are connected in a state of blocking from outside air. An exhausting wind-recovering duct 8b is equipped for connecting and sending the exhaust air from the down stream side hot air circulating and exhausting system 1b to the hot wind heating and blowing device in the upstream side 2a. At a hot air passage between a hot air blowing out port 13 and a hot air sucking port 14 of the upstream side drying chamber 4a, an air resistance-imparting part 15 for reducing the cross sectional area of the hot air is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air drying device of a warp gluing machine for drying warped yarns with hot air after gluing.

[0002]

2. Description of the Related Art Conventionally, in order to increase the production efficiency of a warp sizing machine, the warp running speed has been increased. However, in order to increase the speed of the sizing machine, it is necessary to increase the drying capacity of a drying chamber. There is. Therefore, in order to increase the drying capacity, hot air is passed in the direction opposite to the running of the warp in the drying chamber,
Along with increasing the wind speed relative to the warp, the hot air passing through the drying chamber is made as high as possible.
However, when the hot air is heated to a high temperature, it is necessary to reduce the influence of heat on the physical properties of the warp.

For this reason, conventionally, a hot-air circulating exhaust system, which comprises a drying chamber and a hot-air heating / blowing device and discharges a part of hot air circulating through the drying chamber and the hot-air heating / blowing device, is provided as follows. It was a system. That is, there are two systems: an upstream side where the warp is wet and the temperature of the hot air can be set high, and a downstream side where the warp has already been dried to some extent and the drying temperature cannot be set high.

[0004] In the hot air drying device of the warp gluing machine having this structure, the exhaust air of the downstream hot air circulating exhaust system is connected to the upstream hot air heating and blowing device to be reused to increase energy efficiency. Attempted. As shown in FIG. 3, for example, the structure of the hot-air drying device includes upstream and downstream hot-air circulating exhaust systems 1a and 1b.
In a and 1b, heating blowers 2a and 2b, which are hot air blowers, respectively, and drying chambers 4a and 4b in which the warp yarn 3 travels, are provided independently of each other. The heating blowers 2a and 2b are each formed by a steam heater 6, an electric heater 5, a blower 7, and a duct 8 for sending hot air. Further, an exhaust duct 8a for exhausting the hot air of the hot air circulation exhaust system 1a via the exhaust fan 9 and an exhaust air from the exhaust port 18 of the hot air circulation exhaust system 1b via the exhaust fan 9 to the hot air. An exhaust air collection duct 8b for feeding the steam heater 6 of the circulation exhaust air system 1a is provided. The exhaust air collection duct 8b guides the exhaust air of the hot air circulation exhaust system 1b, which has less moisture evaporation and relatively low humidity than the hot air of the hot air circulation exhaust system 1a, to the hot air circulation exhaust system 1a. Can be put in.

[0005]

In the case of the above-mentioned conventional technology, the exhaust air of the downstream hot air circulation exhaust system 1b is introduced, so that the air volume of the upstream heating and blowing device 2a is increased and the drying chamber 4a is increased. The amount of hot air blown to the air increases, and the wind speed also increases. As the wind speed increases, the pressure near the warp outlet 12 of the drying chamber 4a becomes negative, and a phenomenon occurs in which outside air flows into the drying chamber 4a. As a result, heat loss and temperature unevenness occur, causing drying unevenness of the warp yarn 3.
Further, since the wind speed increases, the turbulent state becomes severe near the warp inlet 11 on the upstream side of the drying chamber 4a, and a lot of hot air flows out of the drying chamber 4a from the warp inlet 11 and a large amount of outside air is generated. Flowed in, and further heat loss occurred.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a hot air drying device for a warp gluing machine which has high production efficiency and energy efficiency and does not cause uneven drying of the warp. The purpose is to:

[0007]

SUMMARY OF THE INVENTION The present invention comprises a drying chamber through which hot air passes in a direction opposite to the running of a warp, and a hot-air heating blower, and sends hot air between the drying chamber and the hot-air heating blower. This is a hot-air drying device of a warp gluing machine provided with two hot-air circulating exhaust systems for discharging a part of the hot air to the outside while circulating in a warp running path. And, in order to connect the respective drying chambers of the respective hot air circulating exhaust systems in a state of being cut off from the outside air, and to send the exhaust air from the downstream hot air circulating exhaust system to the upstream hot air heating and blowing device, An exhaust air collection duct connecting the downstream hot air circulation exhaust system and the upstream hot air heating and blowing device is provided, and a hot air passage between the hot air outlet and the hot air suction port of the drying chamber on the upstream side is provided. This is a hot air drying device of a warp gluing machine provided with an air resistance imparting section for reducing the cross sectional area of hot air.

Further, the hot air heating and blowing device comprises a heater for heating the hot air and a blower for blowing the hot air heated by the heater to the drying chamber, and the exhaust air collecting duct is provided with the heater of the hot air heating and blowing device. It is connected to the hot air intake.

The air resistance applying section is provided in the vicinity of the hot air suction port. Further, the air resistance applying section may be capable of adjusting the cross-sectional area of hot air passage.

In the hot air heating / blowing apparatus of the present invention, the exhaust air from the hot air circulating exhaust system on the downstream side is collected by the hot air heating / blowing device of the hot air circulation / exhaust system on the upstream side, and the hot air is blown to the drying chamber. It is blown out and passes in the opposite direction to the warp running direction. At this time, the passing cross-sectional area of the hot air is reduced by the air resistance applying unit, and the air resistance is increased. Therefore, the amount of hot air passing through the drying chamber is reduced, and the pressure of the drying chamber downstream in the warp running direction from the air resistance application unit is increased. Since both drying chambers are connected in a state of being cut off from the outside air, part of the hot air blown into the drying chamber flows to the drying chamber on the downstream side having a low pressure, and flows through the hot air circulation exhaust system on the downstream side. Circulate,
The air is collected again from the exhaust air collection duct by the hot air heating / blowing device located upstream. Also, since the hot air passing through the drying chamber decreases, the turbulence near the warp inlet decreases, and both the hot air flowing out of the warp inlet and the outside air flowing in decrease.
Heat loss is reduced.

The exhaust air from the hot air circulating exhaust system on the downstream side is sent to the hot air intake of the heater of the hot air heating and blowing device, so that the collected exhaust air is heated to become hot air and the drying chamber is heated. Is blown out. Further, after passing through the air resistance applying section, the hot air is in a turbulent state.However, by providing the air resistance applying section near the hot air suction port which is originally in a turbulent state, the running of the warp is disturbed by the turbulent flow. Is to reduce as much as possible.

Furthermore, by making the cross-sectional area of hot air passing through the air resistance applying section adjustable, the air resistance when hot air passes through the air resistance applying section is adjusted, and the amount of hot air passing through the drying chamber is adjusted. At the same time, the pressure in the drying chamber downstream of the air resistance imparting section in the warp running direction is adjusted, and the amount of hot air flowing to the downstream drying chamber is adjusted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot air drying device of a warp gluing machine according to an embodiment in which two rows of hot air circulating exhaust systems 1a and 1b are connected along the running direction of the warp 3, and each hot air circulating exhaust system 1a, 1b, heating and blowing devices 2a and 2b, which are hot-air heating and blowing devices, and a drying chamber 4 through which a large number of glued warps 3 pass in a sheet form.
a and 4b are provided respectively. Here, the two drying chambers 4a and 4b are connected to each other in the vicinity of the two-dot chain line in the center of the figure while being shielded from the outside air.

Each of the heating blowers 2a and 2b includes a steam heater 6, an electric heater 5, a blower 7, and a duct 8 for sending hot air. Each duct 8 has a drying room 4
The hot air outlet 13 is connected to the downstream side of a and 4b. In addition, on the upstream side of each of the drying chambers 4a and 4b,
The hot air suction ports 14 of the heating blowers 2a and 2b are respectively located.

An exhaust port 18 of an exhaust duct 8a for exhausting hot air through an exhaust fan 9 is provided in a hot air circulating exhaust system 1a located on the upstream side with respect to the running direction of the warp 3. Is provided in the vicinity of. Further, the hot air circulating exhaust system 1b located on the downstream side has a hot air inlet 14
An exhaust air recovery duct 8b is provided to connect and circulate exhaust air from an exhaust port 18 provided in the vicinity to the steam heater 6 of the hot air circulating exhaust system 1a via an exhaust fan 9. An air supply port 19 of the exhaust air collection duct 8b is connected to a hot air intake port 20 of the steam heater 6.

The drying chambers 4a and 4b are hollow rectangular parallelepipeds, and a warp inlet 11 is formed at an upstream end of the drying chamber 4a.
A warp outlet 12 is formed at the downstream end of the drying chamber 4b. In the present embodiment, the downstream end of the upstream hot air circulation exhaust system 1a and the downstream hot air circulation exhaust system 1b are arranged.
Is connected to the entire end of both systems, but only the downstream end of the upstream drying chamber 4a and the upstream end of the downstream drying chamber 4b are connected. But it is good.

The hot air drying device of the warp gluing machine of this embodiment is provided with a hot air suction port 1 of the upstream drying chamber 4a.
The hot air path between the hot air outlet 4 and the hot air outlet 13 has an air resistance applying portion 15. The air resistance applying section 15 locally reduces the passage cross section of the hot air inside the drying chamber 4a to increase the air resistance. In this embodiment, the air resistance applying unit 15 is provided near the hot air suction port 14 of the drying chamber 4a, and is constituted by two resistance plates 16 provided on upper and lower wall surfaces of the drying chamber 4a.
The width of the two resistance plates 16 is the same as the inner width of the drying chamber 4a.

Next, the operation and operation of the hot air drying device of the warp gluing machine of this embodiment will be described. First, a large number of sheet-like warps 3 are glued by a gluing device (not shown), then enter the inside of the drying chamber 4a from the warp inlet 11, travel inside the drying chamber 4a, and move between the upper and lower resistance plates 16. , Further travels inside the drying chambers 4a and 4b, and exits from the warp outlet 12 in a dry state.

At this time, the hot air flows in the hot air circulating exhaust system 1a on the upstream side with respect to the running direction of the warp yarn 3, and the hot air heated by the electric heater 5 and the steam heater 6 is dried by the blower 7 in the drying chamber 4a. Hot air outlet 13
From the inside of the drying chamber 4a, and the sheet-like warp 3
Travels in the opposite direction to the traveling direction of the air resistance, passes between the upper and lower resistance plates 16 of the air resistance applying portion 15 and passes through the hot air suction port 14.
And returns to the heating blower 2a. The exhaust air from the hot air circulation exhaust system 1b is supplied to the heaters 5 and 6 of the heating blower 2a.
In the vicinity of the hot air intake 20, the hot air returned from the hot air inlet 14 merges with the hot air, is heated by the heaters 5 and 6, is blown out to the drying chamber 4a by the blower 7, and passes through the hot air passage of the hot air circulating exhaust system 1a. Circulate.

In the downstream hot air circulating exhaust system 1b, the hot air heated by the electric heater 5 and the steam heater 6 of the heating blower 2b is also supplied to the duct 8 by the blower 7.
Through the hot air outlet 13 of the drying chamber 4b through the drying chamber 4b.
And travels in the opposite direction to the running direction of the sheet-like warp yarn 3 and returns to the heating blower 2b again through the hot air suction port 14.

Further, a part of the hot air circulating in the hot air circulating exhaust system 1b is supplied to the hot air inlet 14 of the heating blower 2b.
The air is exhausted from an exhaust hole 18 provided in the vicinity, and is returned to the hot air circulating exhaust system 1a via the exhaust air collecting duct 8b.
The hot air temperature at the hot air outlet 13 of the upstream hot air circulating exhaust system 1a is lower than that of the hot air circulating exhaust system 1b of the downstream hot air circulating exhaust system 1b because the warp yarn 3 is wet and is less affected by heat. It is set higher than the hot air temperature. Further, in the upstream drying chamber 4a, more moisture evaporates from the warp yarn 3 and the humidity is higher than in the downstream drying chamber 4b. In this embodiment, the exhaust air of the downstream hot air circulation exhaust system 1b having a low humidity is returned to the upstream hot air circulation exhaust system 1a, heated and reused.

In this embodiment, an air resistance applying section 15 is provided near the downstream side of the hot air suction port 14 inside the drying chamber 4a.
Two resistance plates 16 are provided. Due to the presence of the two resistance plates 16, the cross-sectional area of hot air passing through the drying chamber 4a decreases, and the downstream direction of the warp 3 in the running direction of the warp 3 with respect to the air resistance application unit 15 is reduced. Side, the air pressure in the drying chamber 4a increases, the amount of hot air passing through the drying chamber 4a decreases, and the flow of hot air slows. Therefore, the turbulence state of the hot air near the warp inlet 11 decreases, and the warp inlet 11 In this case, the outflowing hot air and the invading outside air are both reduced. Therefore, the amount of outside air entering the hot air suction port 14 is reduced, so that much hot air is recovered from the hot air suction port 14 and circulates through the hot air circulation exhaust system 1a on the upstream side, thereby achieving extremely high thermal efficiency. .

A part of the hot air flowing through the drying chamber 4a is
The air is discharged to the outside from an exhaust port 18 provided between the warp inlet 11 and the hot air suction port 14. Thereby, the air circulating through the hot air drying device of the warp gluing machine is gradually replaced, and the moisture of the warp 3 after the gluing is discharged to the outside.

According to the hot air drying device of the warp gluing machine of this embodiment, the downstream end of the drying chamber 4a and the upstream end of the drying chamber 4b are connected to each other while shutting off the outside air. Outside air does not flow into the downstream end of 4a, and there is no loss of heat. In the hot air passage between the hot air suction port 14 and the hot air outlet 13, the pressure of the hot air downstream of the air resistance applying section 15 of the drying chamber 4 a by the air resistance applying section 15 provided near the hot air suction port 14. And a part of the hot air blown out from the hot air outlet 13 is
It flows into b. Thus, it is possible to prevent hot air having a low temperature in the drying chamber 4b from flowing from the upstream end to the downstream end of the drying chamber 4a. Therefore, it is possible to prevent the downstream side of the drying chamber 4a from becoming uneven in temperature, and prevent the warp from becoming uneven in drying and impairing the quality.

Further, the flow of the hot air is disturbed by the air resistance applying section 15 to be turbulent, and the running of the warp is disturbed. However, the air resistance applying section 15 is provided near the hot air suction port 14 which is originally in a turbulent state. Therefore, the influence of providing the air resistance applying unit 15 is small.

The hot air blown out from the hot air outlet 13 of the upstream hot air circulating exhaust system 1a and flowing into the drying chamber 4b is returned to the downstream hot air circulating exhaust system 1b. The exhaust gas is returned to the hot air circulation exhaust system 1a on the upstream side again by the exhaust air collection duct. In this way, the exhaust air from the downstream hot air circulation exhaust system 1b is collected without waste, and extremely high thermal efficiency is realized.

The resistance plate 16 serves to reduce the cross-sectional area of hot air passage, and may be provided only at the upper or lower part of the drying chamber 4a, or may not necessarily be provided over the entire width. Further, when both the upper and lower portions of the drying chamber 4a are provided, the upper and lower portions do not have to be at the same height.

Further, the resistance plate 16 of the air resistance applying section 15
May be changed in height as shown in FIG. Thereby, air resistance can be adjusted. The air resistance applying section 15 includes, for example, a bracket 20 and a resistance plate 16. The resistance plate 16 is provided with an elongated hole 21 that can be adjusted in the height direction.
The nut 22 is fixed so as to be adjustable in the height direction.

According to this, the air resistance can be adjusted by changing the mounting height of the resistance plate 16 in accordance with the conditions of the warp, and the air pressure and the flow of hot air in the drying chamber can be adjusted to an optimum state. Can be.

[0030]

According to the hot air drying device of the warp gluing machine of the present invention, the exhaust air of the downstream hot air circulating exhaust system is returned to the upstream hot air circulating exhaust system, and the upstream and downstream drying chambers are cooled. The thermal efficiency is improved by preventing the inflow of outside air by connecting in a state where the outside air is shut off. Furthermore, by providing an air resistance imparting section in the upstream drying chamber, the amount of hot air passing through the upstream drying chamber is reduced, turbulence near the warp inlet is suppressed, and outside air enters from the warp inlet. Is prevented, and the thermal efficiency is further improved. Further, by providing the air resistance imparting portion, the pressure of the upstream drying chamber is increased, and the hot air of the downstream drying chamber whose temperature is not so high enters the upstream drying chamber, and the temperature of the drying chamber is reduced. The occurrence of uneven drying of the warp due to unevenness can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hot air drying device of a warp gluing machine according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a modified example of the air resistance applying section of the hot air drying device of the warp gluing machine shown in FIG.

FIG. 3 is a cross-sectional view of a hot air drying device of a conventional warp gluing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1a, 1b Hot air circulating exhaust system 2a, 2b Heating and blowing device 3 Warp 4a, 4b Drying room 5 Electric heater 6 Steam heater 7 Blower 8a Exhaust duct 8b Exhaust air collecting duct 9 Exhaust fan 11 Warp inlet 12 Warp outlet 13 Hot air Outlet 14 Hot air suction port 15 Air resistance applying part 16 Resistance plate 18 Exhaust port 20 Hot air intake

Claims (4)

[Claims] 1. A hot air blower and a drying chamber through which hot air passes in a direction opposite to the running of the warp, and a part of the hot air while circulating hot air between the drying chamber and the hot air blowing apparatus. In a hot-air drying device of a warp gluing machine provided with two hot-air circulation exhaust systems along the warp running path, the drying chambers of the hot-air circulation exhaust systems are shut off from outside air. Connect the downstream hot air circulating exhaust system and the upstream hot air heating and blowing device to send exhaust air from the downstream hot air circulating exhaust system to the upstream hot air heating and blowing device. A hot air passage between the hot air outlet and the hot air inlet of the drying chamber on the upstream side, and an air resistance imparting section for reducing a cross-sectional area of hot air. Hot air dryer for warp sizing machines. 2. The hot air heating / blowing device comprises a heater for heating hot air and a blower for blowing hot air heated by the heater to the drying chamber, and the exhaust air collecting duct is provided with the heater of the hot air heating / blowing device. 2. The hot-air drying device for a warp gluing machine according to claim 1, wherein the hot-air drying device is connected to a hot-air intake port. 3. The air resistance applying part is provided near the hot air suction port.
Or a hot air drying device for the warp gluing machine according to 2. 4. The hot air drying apparatus for a warp gluing machine according to claim 1, wherein the air resistance applying section has a freely adjustable cross-sectional area for passing hot air.