JPH063272Y2 - Automatic drain device - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic drain discharge device, and more specifically,
The present invention relates to a drain automatic discharge device in which a plurality of drain discharge solenoid valves are arranged in an air compressor and its peripheral devices to automatically discharge drain.

[Conventional technology]

As is well known, compressed air is usually produced by compressing air using an air compressor, so that the water vapor in the air changes into water and saturated water vapor depending on the compression ratio. In addition, since the compressor cylinder oil, dust, iron rust, etc. are mixed into the compressed air, contaminated condensate (drain) containing water, oil, dust, iron rust, etc. is generated on the discharge side of the air compressor. To do. The generated drain collects under the peripheral equipment such as the air compressor, the receiver tank, the aftercooler, the dehumidifier, and the drain separator.

Therefore, it is required to frequently discharge the dirty drain to the outside of the machine. Conventionally, for example, the actual exploitation 58-
As shown in Japanese Patent Publication No. 99599 and Japanese Patent Laid-Open Publication No. 59-13196, a drain discharge solenoid valve is arranged in an air tank.

Japanese Utility Model Laid-Open No. 58-99599 and Japanese Unexamined Patent Publication No. 59-59
In the case of the automatic drain discharge device disclosed in Japanese Patent No. 13196, since the opening / closing operation of the drain discharge solenoid valve is controlled by the program timer, the drain generated in the air tank can be efficiently removed by compressing the air with the air compressor. It can be well discharged to the outside.

By the way, an air compressor system may be constructed by connecting a receiver tank, an aftercooler, a dehumidifier, etc. to the air compressor. In such a case, drainage occurs at various places in the peripheral equipment connected to the air compressor system. Therefore, as shown in the above publications, if the drain discharge solenoid valve is provided only in the air tank, the drain generated in the entire air compressor system cannot be efficiently discharged to the outside.

Therefore, in such a case, it is conceivable to dispose two or more drain discharge solenoid valves.

FIGS. 3 (A) and 3 (B) schematically show an example in which a plurality of drain discharge solenoid valves are arranged.
In FIG. 3, reference numerals 1 ', 2', 3 '... Show drain drain solenoid valves, 10' is an air compressor,
Reference numeral 11 'indicates a peripheral circuit.

When controlling the opening / closing operation of these drain discharge solenoid valves 1 ', 2', 3 '... More specifically, when controlling the opening cycle and the opening time, each drain discharge solenoid valve is controlled. It is necessary to control 1 ', 2', 3 '... When performing such control, generally, as shown in FIGS. 3 (A) and 3 (B), timers T1 and T2 are provided to the drain discharge solenoid valves 1 ', 2'and 3', respectively. , T3 ...
... is attached to control.

When a plurality of drain discharge solenoid valves are arranged in this way, it is necessary to devise control of the opening / closing operation of each drain discharge solenoid valve. That is, explaining this with reference to FIG.
In FIG. 4, reference numeral t1 indicates the open time of one drain discharge solenoid valve 1 ', and t2 indicates the closed time of one drain discharge solenoid valve 1'.

Further, t'1 is the opening time of the other drain discharge solenoid valve 2 ', t'2 is the closing time of the other drain discharge solenoid valve 2', and t'1 is the further drain discharge solenoid valve. The opening time of 3 ', t "2, shows the closing time of another drain discharge solenoid valve 3'.

As can be seen from these examples, the above times t1, t2,
No matter how different t′1, t′2, t ″ 1 and t ″ 2 are, the code t3 is always used during long operation as long as they are individually controlled by individual timers. There are times when the drain discharge solenoid valves 1 ', 2', 3'are all overlapped and opened as shown in FIG. Then, the pressure of the air compressor 10 ', peripheral equipment, and the pipe 11' is drastically reduced, and there is a problem that the drain cannot be discharged due to the pressure difference when the compressed air is discharged into the atmosphere. Occur.

In order to eliminate such a problem, the applicant of the present application has proposed, in Japanese Patent Application No. 63-19740, an automatic drain discharge device in which a plurality of drain discharge solenoid valves are centrally controlled by a sequential timer.

[Problems to be solved by the device]

According to the drain automatic discharge device proposed in Japanese Utility Model Application No. 63-19740, a plurality of drain discharge solenoid valves are controlled so that only one is always operated. You can prevent the decline.

However, in this case, since the centralized control is performed by one sequential timer, it is necessary to provide the control terminals as much as can be controlled according to the plurality of drain discharge solenoid valves. For this reason, the number of drain discharge solenoid valves that can be centrally controlled is determined by the number of control terminals provided in the sequential timer. Therefore, when it becomes necessary to add the drain discharge solenoid valve, there is a problem that it becomes difficult to meet the demand. Therefore, by arranging a sequential timer having a large number of control terminals, it is possible to cope with a case where the need for expansion is generated later. However, this has a drawback that the initial equipment becomes excessive.

In consideration of the above-mentioned problems, the present invention enables the drain accumulated in the air compressor system to be efficiently discharged to the outside due to the pressure difference when the compressed air generated by the air compressor is discharged into the atmosphere. The purpose is to be able to easily meet the demand for expansion.

[Means for Solving the Problems]

In order to achieve the above object, the present invention has the following technical means. That is, the present invention will be described with reference to the reference numerals in the accompanying drawings corresponding to the embodiments. In a drain automatic discharge device that is provided with a drain discharge solenoid valve that is opened and closed by the above, and when the drain discharge solenoid valve is opened, the drain accumulated in the air compressor and the peripheral equipment of the air compressor is discharged to the outside. ; The drain discharge solenoid valves (3A), (3B), (3C) ... (3n) are arranged in the vicinity of the air compressor 1 and peripheral devices of the air compressor 1, respectively. Open / close control of the drain discharge solenoid valve by making a one-to-one correspondence with each of the valves (3A), (3B), (3C) ... (3n) A timer for setting the open time for opening the drain discharge solenoid valve controlled by each and the closing time for closing the drain discharge solenoid valve in each of the above timers. Setting section (TS)
And a timer unit (TIME) for controlling the time set by the timer time setting unit (TS), and a reset unit (RESET) for receiving a reset signal for setting the operation of the timer unit in a reset state. , A signal sending unit (OUT) for outputting a signal for controlling the opening / closing operation of the drain discharge solenoid valve or a signal for outputting a trigger signal for prompting the orbit of another solenoid valve, and the timer unit The trigger input section (TRG) for receiving the trigger signal to start the operation of the timer is provided, and the signal transmission section (OUT) of one timer starts the operation of the timer section like the trigger input section (TRG) of another timer. The automatic drain device for drains is characterized in that the plurality of timers are connected endlessly so as to be supplied to the input portion, and the timers are sequentially operated. .

[Action]

Since the drain automatic discharge device of the present invention is provided with a plurality of drain discharge solenoid valves at the required points of the air compressor system, the drain generated in the air compressor system is discharged to the outside from a plurality of places of the air compressor system. Therefore, the drain can be reliably discharged to the outside, so that cleaner air can be supplied.

Also, by controlling so that the drain discharge solenoid valves do not open simultaneously, it is possible to prevent the pressure of the air compressor from dropping sharply, and the compressed air generated by the air compressor is released to the atmosphere. By effectively utilizing the pressure difference when discharging inside, it is possible to discharge the drain accumulated in the air compressor system to the outside, and by controlling each drain discharge solenoid valve with an individual timer, later It is possible to easily meet the demand for expansion.

〔Example〕

Next, FIGS. 1A, 1B, 1C, and 2 of the accompanying drawings
A preferred embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is an air compressor, 2 is a pipe on the discharge side of the air compressor, which is connected to a device for compressed air not shown. And, in the example of the figure, one drain discharge solenoid valve is provided at the air compressor 1,
That is, the drain discharge solenoid valve indicated by reference numeral (3A) and the pipe 2 described above.
At a predetermined interval, a plurality, that is, the code (3B),
The drain discharge solenoid valve shown by (3C) and (3n) is shown.

In this example, the pipe 2 is arranged at a predetermined interval, but when the drain discharge solenoid valve is provided in a receiver tank, an aftercooler, a dehumidifier, etc. which are peripheral devices of the air compressor. Also, a wide variety of arrangements are considered.

Now, the present invention has two or more drain discharge solenoid valves as described above.
When there are (3A), (3B), (3C), ... (3n), these are controlled by the following timer device.

That is, it is composed of one type A timer for controlling the drain discharge solenoid valve (3A) and n type B timers. In this example, the drain discharge solenoid valve (3B), (3C), (3n)
Type B timers (B-1), (B-
2) ... (Bn) are shown. The type A timer and the required number of type B timers are sequentially connected in series as will be described later.

The type A timer described above will be described in detail. The time pulse generation circuit (TP) and the power-on reset circuit (POWER ON RESE
T), a power supply circuit (PS), and a drive circuit D for the drain discharge solenoid valve (3A). Furthermore, the time pulse generation circuit (TP) is
It has a timer ON-OFF time setting unit (TS), a timer unit (TIME), and a reset input unit (RESET). In the above, the timer ON-OFF time setting unit (TS) has the closing time T1 and the opening time T2.
Can be arbitrarily set from the outside. During the closing time T1, the drain discharge solenoid valve is opened by opening the switch provided in the drive circuit D.
(3A) is closed.

Further, during the opening time T2, the switch provided in the drive circuit D is closed so that the drain discharge solenoid valve (3
(A) is kept open and the reset input section
(RESET) is a power-on reset circuit (POWER
It receives a reset signal based on the operation of (ON RESET) and a reset signal from a type B timer described later.
It is configured as a repetitive operation timer having a so-called reset input. Further, the power supply circuit (PS) provided in this type A timer is used to supply power to each circuit. When the time pulse generation circuit (TP) receives the reset signal, it starts the closed time T1 and then starts the open time T2.

Then, the type B timer described above, that is, the type (B
-1), (B-2) ... (Bn) Each timer will be described in detail. These are composed of a time generation pulse circuit (TP), a solenoid valve drive circuit D and a signal synthesizing circuit S. And the time pulse generator (TP) is a timer
It has ON-OFF time setting section (TS), timer section (TIME), trigger input section (TRG) and reset input section (RESET). The part of the type A timer that receives the reset signal substantially corresponds to the trigger input section (TRG) of the type B timer.

In the above, the timer ON-OFF time setting unit (TS) can externally set the closing time T3 and the opening time T4.
During the period 3, the switch provided in the drive circuit D is opened to close the drain discharge solenoid valve (3B) or (3C) or (3n).

On the other hand, during the opening time T4, the switch D provided in the drive circuit is closed, so that the drain discharge solenoid valve (3B)
Or (3C) or (3n) is held in the open state, and the reset input section (RESET) is connected to the power-on reset circuit (POWER ON RESET) of the type A timer to operate the power-on reset circuit. The base time pulse generation circuit (TP) is configured to be initialized.

In addition, the trigger input section (TRG) is connected to the timer at the front stage. More specifically, regarding the timer of the preceding stage, for example, the timer of (B-1) among the timers of type B, the output (OUT) of the time pulse generation circuit (TP) of the timer of type A is It is sent out via the trigger input section (TRG) as a trigger signal of the timer of (B-1). That is, the type A timer at the front stage has the opening time T
When step 2 is completed, it is sent as a trigger signal for activating the timer in the subsequent stage.

Further, regarding the B-2 timer of the type B timer, the output (OUT) of the time pulse generation circuit (TP) of the (B-1) timer in the preceding stage of the type B timer is -2) It is sent out via the trigger input section (TRG) as the trigger signal of the timer.

The same applies hereinafter. In addition, the signal synthesis circuit S synthesizes the signal of the output (OUT) of the time pulse generation circuit (TP) and the output (OUT) of the time pulse generation circuit (TP) of the next stage, and outputs the signal to the previous stage. As.

For example, focusing on the (B-1) timer, the above (B-1)
-1) Combine the output (OUT) of the timer and the output (OUT) of the timer of the next stage (B-2),
The reset signal is sent to the time pulse generation circuit of the timer of (2). Similarly, focusing on the (B-2) timer, the output (OUT) of the above (B-2) timer and the timer of the next stage Are combined and sent to the signal combining circuit S of the preceding (B-1) timer.

And the time pulse generation circuit of this type B timer
In (TP), when the trigger signal is received, the closing time T3 is started, and then the opening time T4 is started. That is, the timer operation is started by the above trigger input.

As described above, the type A timer is a repetitive operation timer having a reset input, so the timer operation is started from the state where the reset input signal is lost, but the time T
Since 1> time T3 is set, the type A timer is reset each time the type B timer is operating.

Therefore, after the operation of the timer (B-n) is completed, the next timer operation cycle is automatically started.

The type A timer and the type B timer are arranged side by side as shown in FIG. 1 (B), but may be connected to each other by the connector 4 as shown in FIG. 1 (C).

Next, an operation example is shown. This will be described in detail with reference to FIG.

When the power circuit (PS) of the type A timer is turned on, the power-on reset circuit (POWER ON RESET) operates and all timers A, (B-1), (B-2), ... (B-
n) is cleared to the initial state. In this case, the type A timer is immediately activated by the reset signal, but the type (B-
1), (B-2) ... (Bn) timers are all in a standby state.

After the type A timer is cleared, the timer ON-O
"1" after the time T1 preset by the FF time setting section (TS)
Similarly, the state is maintained for a preset time T2 hours, during which the switch provided in the drive circuit D is closed and the drain discharge solenoid valve (3A) is opened. That is, the drain is discharged during the time T2. During this time, the other drain discharge solenoid valves (3B) (3C) ... (3n) are kept closed. Then, after the elapse of T2 time, the output of the type A timer changes from "1" to "0". This signal is sent to the trigger input (TRG) of the type B timer (B-1) and was in the standby state until now (B-
1) Detect the change from the timer "1" to "0" and start the timer operation. (B-1) In the timer,
From the time when there was a trigger input, it changed from "0" to "1" after T3 time preset by the timer ON-OFF time setting section (TS) passed, and the switch provided in the drive circuit was closed. The connected drain discharge solenoid valve (3B) opens.

That is, during the time T4, the drain discharge solenoid valve controlled by the (B-1) timer is open. During this period, the other drain discharge solenoid valves are closed. Furthermore, after a preset T4 time has elapsed, the output changes from "1" to "0", the operation of the timer (B-1) is stopped, and at this time, the switch provided in the drive circuit D is opened. , Drain discharge solenoid valve (3
While B) is closed, the trigger signal is input to the next timer (B-2). As a result, this time the timer (B-2) starts the timer operation in the same order as before,
The drain discharge solenoid valve (3C) opens in the same order as above.

The same is repeated thereafter. In this way, each timer opens only for a set time from the time when the trigger signal is input once in one cycle, and the others are in the standby state.

That is, since each timer operates sequentially, two or more drain discharge solenoid valves (3A), (3B), (3C) ・
... (3n) never open at the same time.

In addition, when the number of drain discharge solenoid valves increases or decreases, it is only necessary to increase or decrease the type B timer accordingly. And, the opening time and closing time of the above type A and B timers, that is, the drain discharge solenoid valves (3A), (3B), (3C), ...
・ ・ The opening / closing time of (3n) can be freely adjusted by the timer ON-OFF time setting unit (TS) of each timer according to the situation of the site.

[Effect of device]

As described in detail above, according to the present invention, a plurality of drain discharge solenoid valves are arranged at the required points of the air compressor system, and the opening / closing operation of each of the plurality of drain discharge solenoid valves is individually controlled. The drain generated in the air compressor system can be discharged to the outside from a plurality of locations in the air compressor system, and thus the drain can be reliably discharged to the outside. Therefore, it is possible to reduce the possibility that the drain is mixed in the compressed air as much as possible, and it is possible to supply cleaner air.

In addition, because the drain discharge solenoid valves are controlled so that they do not open simultaneously, it is possible to effectively use the pressure difference when releasing the compressed air generated by the air compressor into the atmosphere. The drain accumulated in the air compressor system can be satisfactorily discharged to the outside.

Furthermore, the control to prevent the above drain drain solenoid valves from opening at the same time is controlled by a signal sending unit (OU
T) is supplied to the trigger input section (TRG) of other timers so that the timers can be operated in sequence by connecting the above timers endlessly. Can be controlled by using individual timers so that multiple timers do not turn on at the same time, and it is possible to easily comply with the request to add solenoid valves later without installing excessive equipment at the beginning. .

[Brief description of drawings]

1 (A) (B) (C) and FIG. 2 of the accompanying drawings show an embodiment of the present invention. FIG. 1 (A) is an overall system diagram, and FIG. 1 (B) (C) is FIG. 2 is a time chart diagram, FIG. 3 (A) and FIG. 3 (B) are diagrams showing a conventional example, and FIG. 4 is a prior art. Is a time chart of. In the figure, 1 ... Compressor, 2 ... Piping, 3A, 3B, 3C ... 3n ... Drain discharge solenoid valve, A ... Type A timer, B-1, B-2, Bn ... Type B timer is there.

Claims (1)

[Scope of utility model registration request] 1. A drain discharge solenoid valve that is opened and closed by timer control is provided in peripheral equipment of the air compressor such as an air compressor, a receiver tank connected to the air compressor, an aftercooler, a dehumidifier, and the like. In a drain automatic discharge device that discharges the drain accumulated in the air compressor and the peripheral equipment of the air compressor to the outside when the drain discharge solenoid valve is opened; the drain discharge solenoid valves (3A), (3B) , (3C) ・ ・ ・ ・ (3n) are arranged near the air compressor 1 and the peripheral equipment of the air compressor 1, respectively, and these drain discharge solenoid valves (3A), (3B), (3C) ・... A timer for controlling the opening and closing of the drain discharge solenoid valve is provided in a one-to-one correspondence with each of (3n), and The chromatography, the timer time setting unit for arbitrarily setting between closed for closing the opening time for opening the drainage solenoid valve, and a drain discharge solenoid valve, each of which controls
(TS), a timer section (TIME) for controlling the time set by the timer time setting section (TS), and a reset section for receiving a reset signal for setting the operation of the timer section to a reset state ( RESET), and a signal sending section (OUT) for outputting a signal for controlling the opening / closing operation of the drain discharge solenoid valve, or a signal for outputting a trigger signal for prompting the activation of another solenoid valve, A trigger input section (TRG) for receiving a trigger signal for starting the operation of the above timer section is provided, and a signal transmission section (OUT) of one timer is connected to a timer section such as the trigger input section (TRG) of another timer. A drain automatic discharge characterized in that a plurality of timers are connected endlessly so that a signal for starting the operation is supplied to the input portion, and the timers are operated in sequence. apparatus.