JPS5822585B2 - Gluing machine temperature control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature control device for a sizing machine.

The size box, dryer, etc. that constitute the pasting machine are heated directly or indirectly using steam as a heat source, and the temperature of the steam heating device described above is controlled under certain conditions.

In other words, the high pressure steam sent from the boiler is reduced to a certain level by a steam pressure reducing valve near the sizing machine, and the temperature of the steam heating device is controlled by further controlling the flow rate and pressure of this reduced pressure steam. Ta.

In this case, the device for controlling the steam is a simple steam pressure control valve, or the temperature L of the steam heating device is
If the solenoid valve automatically opens and closes depending on the drive and stop of the machine or the speed of the machine, or when two steam pipes are connected in parallel by providing a bypass midway through the steam pipe, One side is a base pressure steam pipe, and the other is a control pressure steam pipe, which controls the temperature of the steam heating device.
In some cases, it is a control device that opens and closes a base pressure steam pipe and a control pressure steam pipe depending on whether the machine is driven or stopped or the speed of the machine is high or low.

However, the steam valves used in these steam control devices are expensive, have a short lifespan, and, especially when performing advanced control, have the drawbacks of complex piping, high construction costs, and large space requirements. was.

This invention eliminates the need for the conventional steam control device provided between the steam pressure reducing valve and the steam heating device by using the steam pressure reducing valve also as the steam control device.

Steam pressure reducing valves are generally controlled by weights, springs, diaphragms, etc. so that the pressure after pressure reduction is always maintained at a predetermined value, and when the pressure on the pressure reduction side becomes less than a predetermined value, the above When the force caused by the weight or the like opens the valve, and conversely the pressure on the pressure reduction side becomes larger than a predetermined value, the pressure on the pressure reduction side overcomes the force caused by the weight or the like and closes the valve.

In such a steam pressure reducing valve, the steam pressure on the pressure reducing side is applied to a diaphragm supported by an adjustment spring and weight, and the steam pressure on the pressure reduction side is set to a predetermined pressure by adjusting the spring force of the adjustment spring and the weight of the weight. At the same time, when the steam pressure on the decompression side is out of a predetermined pressure range, the opening degree of the passage between the high pressure chamber and the decompression chamber in the valve body is adjusted by opening and closing the pilot valve attached to the diaphragm, thereby reducing the steam pressure on the decompression side. There is a known device that maintains the value within a predetermined range.

This invention provides a portion where the above-mentioned control spring etc. are provided,
In other words, a sealed chamber is provided adjacent to the diaphragm chamber via the diaphragm, into which a portion of the reduced pressure steam is introduced from the reduced pressure chamber of the valve body, compressed air is introduced into this sealed chamber, and the compressed air is By using air pressure instead of a conventional adjustment spring, etc., and controlling the pressure of this compressed air, the steam pressure on the pressure reducing side of the steam pressure reducing valve is controlled, thereby controlling the temperature of the steam heating device according to the operating conditions. That's what I do.

However, it is also possible to install conventionally used weights and the like in the sealed chamber as they are and use them together with compressed air, and by using this combination, the pressure of the compressed air can be lowered.

The pneumatic pressure control device for the compressed air introduced into the sealed room is
It may be a simple pressure control valve, or it may be one that opens and closes the air supply path to the sealed chamber depending on the speed of the machine or the temperature of the steam heating device.

Furthermore, the air pressure control device may be one that changes the air pressure between two levels, high and low, depending on the speed of the machine or the temperature of the steam heating device. A control device can also be used as appropriate.

Next, embodiments of the invention will be described with reference to the drawings.

First, a first embodiment will be explained with reference to FIG.

The valve box 1 of the steam pressure reducing valve A is divided into a high pressure chamber 2 and a pressure reducing chamber 3, and a passage 4a provided in the valve seat 4 is formed by pressing a valve body 5 onto the valve seat 4 with a main compression coil spring 6. When closed, the lower end of the main compression coil spring 6 is supported by the bottom flap 7.

A cylinder 8 is formed in the upper part of the decompression chamber 3 of the valve box 1, and a main valve rod 10 is provided protruding from a piston 9 slidably provided in the cylinder 8. It is in pressure contact with the valve body 5.

An upper lid 11 is fixed to the upper surface of the valve box 1, and the upper lid 11 is fixed to the upper surface of the valve box 1.
A pilot valve rod 15 with a compression coil spring 13 and a pilot valve 14 is enclosed in a pilot valve chamber 12 provided in the pilot valve chamber 12 .

The compression coil 13 is supported by a cap 16, presses the pilot valve rod 15, and presses the pilot valve 14 against a pilot valve seat 17 formed on the peripheral wall of the pilot valve chamber 12.

In the pilot valve chamber 12, the left side of the pilot valve seat 17 communicates with the high pressure chamber 2 of the valve body 1 through high pressure steam holes 1a and 11a, and the right side of the pilot valve seat 17 communicates with the cylinder 8 of the valve body 1 through the cylinder steam hole 11b. is familiar with

A diaphragm chamber 18 is formed on the right side of the upper lid 11,
The diaphragm chamber 18 is communicated with the vacuum chamber 3 of the valve body 1 through vacuum steam holes 1c and 11c.

Then, the diaphragm 1 is placed on the right side of the diaphragm chamber 18.
A spring case 20 is fixed to sandwich the spring case 9, and a sealed chamber 21 surrounded by a diaphragm 19 and a spring case 20 is formed on the right side of the diaphragm chamber 18.

An adjustment bolt 22 is fixed to the spring case 20 with a nut 23, and a sliding nut 2 is screwed onto the adjustment bolt 22.
4 and the diaphragm 19, an adjustment spring 26 is press-fitted via a seat 25.

An opening 27 is provided in a part of the spring case 20, an air pipe 28 is connected to this opening 27, and compressed air is introduced into the sealed chamber 21.

A pressure control valve 29 is provided at a suitable location on the air pipe 28.

On the other hand, high pressure steam from a boiler is introduced into the high pressure chamber 2 of the steam pressure reducing valve A, and the pressure reducing chamber 3 is connected to the heater B of the dryer via a steam pipe 30.

In the above device, the sum of the elasticity of the compression coil spring 13 of the pilot valve chamber 12 and the reduced steam pressure in the diaphragm chamber 18 acts on the left side of the diaphragm 19, and the adjustment force in the sealed chamber 21 acts on the right side of the diaphragm 19. The combined pressure of the elasticity of the spring 26 and the compressed air pressure acts.

Therefore, when the compressed air pressure in the sealed chamber 21 is maintained constant by the pressure control valve 29, when the pressure of the reduced steam in the pressure reducing chamber 3 of the steam pressure reducing valve A decreases below a certain level,
The pressure on the right side of the diaphragm 19 overcomes the pressure on the left side, causing the pilot valve rod 15 to slide to the left, creating a gap between the pilot valve 14 and the pilot valve seat 17.

That is, the left and right sides of the pilot valve chamber 12 communicate with each other through this gap, and the high pressure steam in the high pressure chamber 2 flows through the high pressure steam hole 1a.

11a, pilot valve chamber 12 and cylinder steam hole 11b
The flow flows into the upper part of the piston 9 in the cylinder 8 and pushes down the piston 9, and the main valve rod 10 of the piston 9 pushes down the valve body 5 against the elasticity of the main compression coil spring 6, causing the high pressure chamber 2 and the pressure to decrease. The chamber 3 communicates with the chamber 3 through a steam passage 4a, and high-pressure steam flows out into the decompression chamber 3.

In a state where the pressures on the left and right sides of the diaphragm 19 are balanced, the gap between the valve seat 4 and the valve body 5 is kept constant, and reduced-pressure steam at a predetermined pressure flows.

Further, when the pressure of the reduced pressure steam in the reduced pressure chamber 3 rises above a certain level and the pressure on the left side of the diaphragm 19 overcomes the pressure on the right side, the diaphragm 19 moves to the right and the pilot valve stem 15 is moved to the right by the compression coil spring 13. As a result, the pilot valve 14 is pressed against the pilot valve seat 17, and communication between the left and right sides of the pilot valve seat 17 is cut off.

Therefore, the downward force of the piston 9 is lost, and the valve body 5 is pushed up by the main compression coil spring 6, and the valve body 5 comes into close contact with the valve seat 4, closing the steam passage 4a and closing the high pressure chamber 2 and the decompression chamber 3. communication with is severed.

As described above, the pressure in the pressure reducing chamber 3 of the steam pressure reducing valve A, that is, the pressure of the reduced pressure steam, is controlled according to the magnitude of the pressure on the right side of the diaphragm 19.

Therefore, when the pressure of the compressed air introduced into the sealed chamber 21 is controlled by the pressure control valve 29, the pressure of the reduced pressure steam is controlled according to the pressure of the compressed air, and the temperature of the heater B is controlled by controlling the pressure of the reduced pressure steam. It is controlled.

Note that the pressure control valve 29 can be provided at any position, so the steam pressure reducing valve A is provided near the heater B, and the pressure control valve 29 is provided in the front part of the ridge so that the heater temperature can be controlled by remote control.

Furthermore, by enclosing the adjustment spring 26 inside the sealed chamber 21, the pressure of the compressed air introduced into the sealed chamber 21 can be set to a low level. By sliding it, the pressure of the adjustment spring 26 can be adjusted.

Furthermore, it is also possible to match the pressure of compressed air and the pressure of reduced pressure steam by appropriately designing each part.

Next, a second embodiment will be explained with reference to FIG.

In the second embodiment, a solenoid valve 31 is provided between the steam pressure reducing valve A and the compressed air pressure control valve 29 in the first embodiment, and the solenoid valve 31 is equipped with a switch box 32 δ end control device 35. They are connected by a circuit 36.

The switch box 32 has a low speed drive button 33 on the machine base,
The speed control device 35 has a high-speed drive button 33a and a stop button 34, and when the low-speed drive button 33 or stop button 34 of the switch box 32 is pressed, the solenoid valve 31 closes the air pipe 28, and the high-speed drive button 33a The air pipe 28 is set to open when is pressed.

Therefore, when the machine is stopped or operating at low speed, compressed air is not sent to the sealed chamber 21 of the steam pressure reducing valve A.
Only the elasticity of the adjustment spring 26 enclosed in the sealed chamber 21 acts as a pressure on the right side of the diaphragm 19, and the pressure of the reduced pressure steam is controlled within a range corresponding to the strength of the adjustment spring 26.

On the other hand, during high-speed driving, compressed air is sent to the sealed chamber 21, so the pressure of the compressed air added to the elasticity of the adjustment spring 26 acts as pressure on the right side of the diaphragm 19.
The pressure of the reduced pressure steam is controlled at a higher level than when the speed is low or stopped.

As described above, in the second embodiment, the pressure of the reduced-pressure steam is controlled to a low level while the machine is stopped and driven at low speed, and the pressure of the reduced-pressure steam is controlled to a high level while the machine is driven at high speed. be able to.

When the machine is stopped or running at low speed, the wet warp yarns just after sizing do not enter the dryer at all, or even if they do enter, the amount is small, so the amount of heat lost by heater B is less than that during high-speed operation. It's less compared to that.

Therefore, during stoppage and low-speed operation, the pressure of the reduced-pressure steam may be low, but if it is high, the sized warp may become over-dry.

However, in this second embodiment, the pressure of the reduced-pressure steam during stoppage and low-speed drive is automatically controlled to a lower level than during high-speed drive. The temperature of the dryer during high-speed operation can be lowered to below the temperature during high-speed operation, preventing overdrying of the sized warp yarns and saving on the amount of steam used.

Next, a third embodiment will be explained with reference to FIG.

In the third embodiment, another temperature control device 35a is added between the speed control device 35 and the solenoid valve 31 of the second embodiment, and a thermometer installed in the dryer C is added to the temperature control device 35a. 37 are connected by a circuit 38.

The temperature control device 35a is set to open the solenoid valve 31 when the temperature of the dryer C is below a predetermined lower limit temperature, and to close the solenoid valve 31 when the temperature is above a predetermined upper limit temperature. Ru.

However, the temperature control device 35a is controlled by the speed control device 35 and is activated only during high-speed operation, and the dryer C is not activated when the machine is stopped or during low-speed operation.
The solenoid valve 31 does not open even if the temperature of the solenoid valve 31 falls below a predetermined lower limit temperature.

While the machine is being driven at high speed, the solenoid valve 31 closes when the temperature of the dryer C is above the upper limit temperature, and opens when the temperature is below the lower limit temperature.

Therefore, the pressure of the reduced pressure steam is controlled to a constant low level determined by the elasticity of the adjustment spring 26 in the sealed chamber 21 when the machine is stopped and driven at low speed, as in the first embodiment, and when the machine is stopped and driven at low speed. During operation, when the temperature of dryer C reaches the upper limit temperature, the pressure of the reduced pressure steam is controlled to a low level, and dryer C
When the temperature reaches the lower limit temperature, the pressure of the reduced pressure steam is controlled to a high level.

That is, in the third embodiment, the dryer C during high-speed operation
Since the temperature can be controlled to be kept constant, it is effective in preventing overdrying and insufficient drying during high-speed operation, and in saving steam.

Next, a fourth embodiment will be explained with reference to FIG.

In the fourth embodiment, a bypass is provided at the position of the pressure control valve 29 of the second embodiment, so that one of the two air pipes arranged in parallel is a base pressure air pipe 28a and the other is a control pressure air pipe 28b. Pressure control valve 29a t
29b, both air pipes 28 a t 28 b
A temperature control device 35b is connected between the electromagnetic changeover valve 39 and the speed control device 35 by a circuit 40, and a temperature control device 35b is connected to the dryer C.
A thermometer 37 is connected by a circuit 38.

In this fourth embodiment, each pressure control valve 29a, 29 of the base pressure air pipe 28a or the control pressure air pipe 28b is
b is set so that each outlet side air pressure is a constant base pressure or a control pressure higher than the base pressure.

In the temperature control device 35b, when the temperature of the dryer C is above a predetermined upper limit temperature, the electromagnetic switching valve 39 opens with respect to the base pressure air pipe 28a, and when the temperature of the dryer C is below a predetermined lower limit temperature. At this time, the electromagnetic switching valve 39 is set to open to the control pressure air pipe 28b.

Therefore, when the machine is stopped and driven at low speed, the solenoid valve 31 is closed and compressed air is not supplied to the sealed chamber 21 of the steam pressure reducing valve A at all, as in the second and third embodiments. ,
During high-speed operation of the machine, the solenoid valve 31 opens;
is open, when the temperature of the dryer C reaches the upper limit temperature, the air supply from the control pressure air pipe 28b stops, and the air supply starts from the base pressure air pipe 28a, and the temperature of the dryer C reaches the predetermined lower limit temperature. Then, air is supplied to the sealed chamber 21 through the control pressure air pipe 28b.

That is, the pressure inside the sealed chamber 21 of the steam pressure reducing valve A is determined by three factors: only the elasticity of the adjustment spring 260, the total pressure of the elasticity of the adjustment spring 26 and the base pressure air pressure, and the total pressure of the elasticity of the adjustment spring 26 and the control pressure air. Depending on this change, the pressure of the vacuum steam changes to three levels: low, medium, and high.

When the machine is stopped and running at low speed, the pressure of the vacuum steam is set to a low level, and when the machine is running at high speed, the pressure of the vacuum steam is automatically set to a medium or high level in response to the rise and fall of the dryer temperature. Change.

Therefore, in the fourth embodiment, the temperature of the dryer C during high-speed operation can be controlled within a narrower range than in the third embodiment.

In the fourth embodiment, instead of alternately supplying the base pressure air and the control pressure air, the base pressure air is constantly supplied, and the control pressure air (however, the control pressure air in the fourth embodiment) is constantly supplied. The same effect can be obtained by adding a pressure different from that of

As explained above, the present invention modifies a part of the steam pressure reducing valve to provide a sealed chamber in the part where weights or springs were conventionally provided, and supplies compressed air to the sealed chamber. The pressure of the reduced steam is controlled by controlling the air pressure, thereby controlling the temperature of the steam heating devices such as dryers and size boxes. The use of expensive steam pulps can be omitted, the number of piping bases can be reduced, and since only air pipes are needed for control piping, remote control is easy, and other control equipment can be combined. Therefore, it can be used for various types of control other than those shown in the embodiment.

[Brief explanation of the drawing]

Fig. 1 is a piping system diagram of the first embodiment including a vertical front view of the steam pressure reducing valve, Fig. 2 is a piping system diagram of the second embodiment, Fig. 3 is a piping system diagram of the third embodiment, and Fig. 4 is a piping system diagram of the second embodiment. The figure is a piping system diagram of the fourth embodiment. A: Steam pressure reducing valve, B: Heater, C: Dryer (steam heating device), 21: Sealed chamber, 28: Air pipe, 29: Pressure control valve, 30: Steam pipe, 31: Solenoid valve, 35: For speed Control device, 35 a, 35 b: temperature control device,
37: Thermometer, 39: Solenoid switching valve.

Claims (1)

[Scope of Claims] 1. A sealed chamber is provided via a diaphragm in a diaphragm chamber on which steam acts on the pressure reducing side of a steam pressure reducing valve provided in a steam pipe connected to a steam heating device of a pasting machine, and an air pipe is connected to this sealed chamber. A temperature control device for a pasting machine, characterized in that the air pipes are connected to each other and an air pressure control device is provided to the air pipe. 2. A temperature control device for a pasting machine according to claim 1, wherein the air pressure control device is a pressure control valve. 3. The air pressure control device consists of a pressure control valve and a solenoid valve installed in series on the steam pressure reducing valve side of the pressure control valve, and this solenoid valve is closed when the machine is stopped and when the machine is driven at low speed, and when the machine is driven at high speed. 2. A temperature control device for a pasting machine according to claim 1, wherein the temperature control device is configured to open at the right time. 4. A patent in which the air pressure control device consists of a pressure control valve and a solenoid valve installed in series on the steam pressure reducing valve side of the pressure control valve, and the solenoid valve is opened and closed according to the temperature of the steam heating device. A temperature control device for a pasting machine according to claim 1. 5 The air pressure control device connects in parallel a base pressure air pipe equipped with a pressure control valve for base pressure setting and a control pressure air pipe equipped with a pressure control valve for control pressure setting, and connects the steam pressure reducing valve side. 2. The temperature control device for a pasting machine according to claim 1, further comprising an electromagnetic switching valve provided in the sizing machine, the electromagnetic switching valve being operated according to the temperature of the steam heating device. 6. The temperature control device for a gluing machine according to any one of claims 1 to 5, wherein the sealed chamber has a compression coil spring pressurized therein. 7. A temperature control device for a pasting machine according to any one of claims 1 to 6, wherein the steam heating device is a size box. 8. The temperature control device for a pasting machine according to any one of claims 1 to 6, wherein the steam heating device is a dryer.