JPH0817966B2 - Liquid discharge device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid discharge device, and more specifically, a pump device that operates by power from a prime mover, a nozzle, and a liquid delivery pipe that connects these pump device and the nozzle. And a liquid discharge device capable of remotely controlling the operation of an operating device provided on the pump device side.

(Prior Art) Conventionally, in this type of liquid discharge device, start / stop control of a prime mover that drives a pump device, control of discharge pressure of liquid discharged from a nozzle, mixing ratio of a drug mixed in liquid discharged from a nozzle, etc. Is known, and these controls are performed remotely on the nozzle side. There is one that uses a pressure switch as one of them, but in this configuration, a stop valve is provided in the middle of the liquid feeding pipe,
When the nozzle is closed during the liquid discharging operation from the nozzle, a water hammer phenomenon is generated in the liquid feeding pipe between the check valve and the nozzle, and a high pressure due to the water hammer phenomenon is generated in the liquid feeding pipe. And the high pressure accumulated in the liquid supply pipe is released from the nozzle by opening the nozzle so that the inside of the liquid supply pipe becomes low pressure, while the liquid transfer between the check valve and the nozzle is performed. A pressure switch for detecting the pressure in the pipe is provided, and the pressure switch is controlled via a conductive wire to, for example, an operation controller for controlling the start and stop of the prime mover, and the high pressure due to the water hammer phenomenon when the nozzle is closed is controlled. The pressure switch detects the pressure to stop the drive of the prime mover, and the nozzle switches open to detect the pressure in the liquid delivery pipe, which is detected by the pressure switch. It is obtained form as to drive the prime mover.

The other is to provide a switch on the nozzle, a prime mover provided on the switch and the pump device, to control the discharge pressure of the liquid discharged from the nozzle, and to control a chemical liquid mixing ratio. The actuator is connected to the actuator through a conductive wire, and the switch provided on the nozzle side is operated to control the actuator such as the prime mover and the solenoid valve.

(Problems to be solved by the invention) However, when controlling a prime mover and a solenoid valve actuating device by using a conductive wire in these conventional devices, a short circuit of the conductive wire or the like may cause an electric leakage at the portion of the liquid delivery pipe side. In addition, there is a problem that the liquid supply pipe side part becomes heavy, and in the case of a device in which the operating equipment such as the prime mover is controlled to start and stop by a pressure switch, the pump device is driven.
Since the nozzle is closed to stop the liquid discharge, a high pressure due to the water hammer phenomenon always acts on the liquid feed pipe, the check valve and the opening / closing valve of the nozzle while the nozzle is closed. As a result, there is a problem that the service life of these liquid supply pipes and check valves is short, and if there is liquid leakage at the check valve connection part and nozzle connection part of the liquid supply pipes, when the nozzle is closed, There is a problem that the pressure inside the liquid delivery pipe becomes low, the pressure switch operates, and the prime mover and the pump device are driven.

A main object of the present invention is to control the operation of actuating equipment such as a prime mover for driving a pump device and a solenoid valve by remote control, and at the same time, to prevent electric leakage at the side of the liquid sending pipe, The side portion can be lightened, and it is not necessary to accumulate high pressure in the liquid delivery pipe when the nozzle is closed, as in the conventional example using a pressure switch.

(Means for Solving the Problems) Therefore, in the present invention, the pump device (1) and the nozzle (4) which are operated by the power from the prime mover and the pump device (1) and the nozzle (4) communicate with each other. A liquid discharge device comprising a liquid feed pipe (3), wherein an optical fiber (5) is arranged between the pump device (1) side and the nozzle (4) side, while the optical fiber (5) is provided. A light emitting element (6) for emitting an optical signal and a light receiving element (8) for receiving the optical signal transmitted by the optical fiber (5) are provided, and the light receiving element (8) is provided on the pump device (1) side. It is electrically connected to an operation controller (9) for controlling the operation of an operating device to be provided, and is provided with an operating means for on / off controlling the output of the optical signal on the nozzle (4) side.

(Operation) Using the optical fiber (5), the light emitting element (6) and the light receiving element (8), an optical signal emitted from the light emitting element (6) is transmitted to the light receiving element (8) through the optical fiber (5). Since the operation of the actuating device provided on the pump device (1) side is controlled, this control can be performed by remote control, and at the same time, it is possible to eliminate leakage of electricity on the side of the liquid delivery pipe (3) and The part on the liquid pipe (3) side can be made lightweight.

(Example) In the drawings, (1) is a pump device that is connected to a prime mover (2) that constitutes an operating device and that is operated by the power from the prime mover (2), and the discharge port of this pump device (1) A liquid feed pipe (3) is connected to the liquid feed pipe (3), a nozzle (4) is connected to the outlet of the liquid feed pipe (3), and the pump device (1) is added in the middle of the liquid feed pipe (3). A pressure control valve (not shown) for controlling the pressure of the pressurized liquid under pressure is provided.

The prime mover (2) and the pump device (1) are supported by a frame (F), and the nozzle (4) operates the grip (41), the on-off valve (42) and the on-off valve. And a valve lever (43).

Therefore, in the embodiment shown in FIGS. 1 to 4, an optical fiber (5) is arranged in the liquid delivery pipe (3) which connects the pump device (1) and the nozzle (4) to each other. Both ends of the optical fiber (5) are taken out from both ends of the liquid feeding pipe (3) to the outside, and a light emitting element (6) for emitting an optical signal to the optical fiber (5) is provided to the nozzle (4), A battery (7) for operating the light emitting element (6) is provided, and
A light receiving element (8) for receiving an optical signal transmitted by the optical fiber (5) in the frame (F) on the side of the pump device (1) and converting the optical signal into an electric signal, and the prime mover (2). The nozzle (4) is electrically connected to an operation controller (9) for controlling the start / stop of the operation, and the nozzle (4) is provided with an operating means including a switch (10) for on / off controlling the output of the optical signal. Of.

In the above structure, the light emitting element (6) mainly uses a light emitting diode that emits visible light, and
The light emitting device (6) and the battery (7) are, for example, the second
As shown in the figure, the grip (41) of the nozzle (4) is formed hollow and is incorporated into the grip (41).

The end of the optical fiber (5) on the nozzle side is held at the lower end of the grip (41), and its open end is made to face the light emitting portion of the light emitting element (6).

The switch (10) is attached to a portion of the grip (41) facing the valve lever (43) and is turned on / off by operating the valve lever (43).

The light receiving element (8) mainly uses a phototransistor, and the light receiving element (8) is connected to the operation controller (9) via an amplifier (11).

The operation controller (9) is provided with a relay (R ₁ ) and an electromagnetic switch (MS) as shown in FIG. 3, and the electromagnetic switch (MS) and the A contact of the relay (R ₁ ). (R ₁ -1) is connected in series to control ON / OFF of the A contact (MS-1) of the electromagnetic switch (MS).

Further, at the optical fiber take-out portion of the liquid feed pipe (3), for example, as shown in FIG. 9, an take-out tool (12) having an insertion hole (12a) for inserting the optical fiber (5) is provided at the liquid feed pipe (3). The both ends of the optical fiber (3) are connected to the both ends of the insertion hole (12a) by connecting means such as a cap nut (13), and the cap nut (1) is attached to the end of the insertion hole (12a).
4) is screwed, a conical groove (12b) is provided on the end surface of the insertion hole (12a), a seal ring (15) is provided in the groove (12b), and the cap nut (14) is provided. The seal ring (15) is elastically deformed by tightening the
The part (a) is sealed and the optical fiber (5) is held to prevent the optical fiber (5) from moving.

The optical fiber (5) takes out one optical fiber arranged in the liquid feeding pipe (3) to the outside and connects it to the light emitting element (6) and the light receiving element (8). , An optical fiber (5a) arranged in the liquid delivery pipe (3) as shown in FIG. 10, and the light emitting element (6),
Using the optical fiber (5b) connected to the light receiving element (8), the end of the optical fiber (5a) is connected to the extractor (12).
Of the optical fiber (5b) while the optical fiber (5a) is held in the ejector (12) by the cap nut (14) and the seal ring (15). The end portion is inserted into the insertion hole (12a) from the exit of the insertion light (12a), the end surface is abutted with the end surface of the optical fiber (5a), and the cap nut (14) and the seal ring (15) It is also possible to seal the insertion light (12a) portion with and hold the optical fiber (5b).

Further, the pump device (1) for the optical fiber (5)
The removal at the side is, for example, as shown in FIG. 11, the liquid transfer pipe (3).
An extraction tool (12) having an insertion hole (12a) inserted in the center of the liquid feed pipe (3) is connected to the end of the optical fiber (3) disposed in the liquid feed pipe (3). 5) It can be taken out linearly without bending, and the seal ring (15) and the cap nut (14) are attached to the outlet of the insertion light (12a) to insert the insertion hole (12a). May be sealed and the optical fiber (5) may be held.

The seal of the optical fiber (5) extraction portion and the holding of the optical fiber (5) may be configured as shown in FIGS.

FIG. 12 shows that the optical fiber (5a) arranged in the liquid delivery pipe (3) is inserted into the insertion hole (12a) of the extractor (12) and the end of the insertion hole (12a) is sealed. Ring (1
5) and a translucent plate (16) such as a convex lens for pressing the seal ring (15) are provided, while a sleeve is provided at the end of the optical fiber (5b) connected to the light emitting element (6) and the light receiving element (8). Secure (17) with adhesive and attach cap nut (1
8) Hold the cap nut (18) through the insertion hole (12a)
The transparent plate (16) is pressed by the sleeve (17) by being screwed to the outlet part of the seal ring (15) to elastically deform and seal the seal ring (15) and hold the optical fiber (5a). There is.

Further, FIG. 13 shows that a sleeve (19) having a tapered surface is provided at the outlet of the insertion hole (12a) of the extractor (12), and the end edge of the sleeve (19) is connected to the insertion hole (12a). By tightening a cap nut (20) screwed to the outlet, the surface of the optical fiber (5) is bitten and sealed and the optical fiber (5) is held.

Further, FIG. 14 shows a seal ring (21), a backup ring (22) for pressing the seal ring (21), a taper surface and a sleeve (23) having a split groove in the taper surface portion.
And the cap nut (20), the taper surface portion of the sleeve (23) is bent by tightening the cap nut (20) into the outlet of the insertion hole (12a) to bend the optical fiber (5). It is configured to be held and sealed by the seal ring (21).

In FIG. 1, (24) is a water suction pipe connected to the suction port of the pump device (1). Also, in FIG.
(25) is a rectifier, (26) is a transformer, (27) is a changeover switch, and (28) is an indicator which lights up when the changeover switch (27) is changed to the automatic side.

The present invention is configured as described above, and when performing cleaning or controlling work, for example, the changeover switch (27) is switched to the automatic side and the valve lever (43) of the nozzle (4) is operated. When the valve lever (43) is operated, the valve lever (43) comes into contact with the switch (10), and the switch (1)
0) is turned on, and the optical signal output from the light emitting element (6) is emitted to the optical fiber (5). The optical signal transmitted by the optical fiber (5) is received by the light receiving element (8), the optical signal is converted into an electric signal by the light receiving element (8), and the electric signal is converted into an operation controller (9). relay) (inputted to the R _1), said relay (R ₁₎ of the a contact (R ₁ -1) is the electromagnetic switch is closed (contact a in MS) (MS-1) is closed motor (2) Is driven, and the prime mover (2) drives the pump device (1) to supply the pressurized liquid to the nozzle (4).

At this time, since the opening / closing valve (42) of the nozzle (4) is open, the pressurized liquid is discharged to the outside from the opening of the nozzle (4).

Further, when the valve lever (43) of the nozzle (4) is released to temporarily stop the work such as cleaning, the valve lever (4) is released.
3) moves away from the switch (10) and the switch (1
0) is turned off, the light signal is not output from the light emitting element (6), and the operation of the light receiving element (8) is stopped. Therefore, the relay (R ₁₎ A contacts (R ₁ -1) and the electromagnetic switch A contacts (MS) (MS-1) is opened, the drive stops the motor (2), the pump device The drive of (1) is stopped.

Since a check valve is not provided in the middle of the liquid feed pipe (3), when the on-off valve (42) of the nozzle (4) is closed, a water hammer is placed inside the liquid feed pipe (3). The phenomenon does not occur, and the pressurized liquid supplied into the liquid delivery pipe (3) while the on-off valve (42) is closed and the driving of the pump device (1) is stopped is Since it is returned from the spill port of the control valve to the water storage tank, the liquid transfer pipe (3)
The inside becomes low pressure. Therefore, it is possible to prolong the service life of the liquid sending parts such as the liquid sending pipe (3) and the on-off valve (42).

Further, when the nozzle (4) is closed, it is not necessary to store a high pressure in the liquid delivery pipe (3), so that liquid leakage may occur in the liquid delivery section between the pump device (1) and the nozzle (4). Even if there is, the pump device (1) can be reliably restarted by remote control.

Further, since the optical fiber (5) is disposed inside the liquid feeding pipe (3) and protected by the liquid feeding pipe (3), damage to the optical fiber (5) is prevented without providing a special protection member. You can do it.

Further, since the switch (10) can be controlled to be turned on and off by operating the valve lever (43) of the nozzle (4), there is no need to operate the switch (10) separately from the valve lever (43), and the work can be performed. The frequency of operations on the nozzle side by the operator can be reduced, and the work can be performed easily.

In the embodiment described above, the optical fiber (5) is arranged inside the liquid feeding pipe (3), but in addition, the optical fiber (5) is arranged outside the liquid feeding pipe (3). Good. In this case, it is preferable that the surface of the liquid supply pipe (3) is bonded by a bonding means such as adhesion, a heat-shrinkable tube, a binding band or the like. Further, when the liquid sending pipe (3) is molded, the liquid sending pipe (3)
In addition, the insertion path of the optical fiber (5) may be formed separately from the liquid feeding path, and the optical fiber (5) may be inserted into the insertion path after the liquid feeding pipe (3) is molded. ,
Further, the optical fiber (5) may be embedded in the liquid feed pipe (3) at the time of molding the liquid feed pipe (3), and the arranging means is not particularly limited.

Further, the grip (41), the opening / closing valve (42) and the valve lever (4
Although the light emitting element (6), the battery (7) and the switch (10) are attached to the grip (41) of the nozzle (4) provided with (3), other than the above, for example, the switch (10) is connected to the valve (10). The valve lever (43) and the switch (10) may be operated separately from each other by being assembled in a position where they do not come into contact with the lever (43), or as shown in FIG. Valve (4
2) and the valve lever (43) are removed, this valve lever (43)
Instead of this, a switch lever (25) is provided, the switch (10) is controlled to be turned on and off by operating the switch lever (25), and the prime mover (2) is driven by turning on the switch (10). Alternatively, as shown in FIG. 5, the grip (41) may be provided on the base end side of the nozzle (4).
The auxiliary grip (44) may be provided in the middle, and the light emitting element (6), the battery (7) and the switch (10) may be assembled to the auxiliary grip (44), and the nozzle (4)
The structure and the mounting position of the light emitting element and the like are not particularly limited. However, the on-off valve (42) and the valve lever (4
In the case of eliminating the structure 3), there is an advantage that the structure of the nozzle (4) can be made very simple, the cost of the nozzle (4) can be reduced and the weight can be reduced, and the liquid discharging work can be easily performed.

Further, the end of the optical fiber (5) on the nozzle side is held by the nozzle (4) and the light emitting element (6) is provided on the nozzle (4). In addition, a holding member is provided separately from the nozzle (4). The holding member holds the end of the optical fiber (5) on the nozzle side and the light emitting element (6), and the holding member is held together with the nozzle (4) by an operator. It's good.

Further, in the above embodiments, the control of the start / stop of the prime mover (2) for driving the pump device (1) has been described, but in addition, the power transmission path of the prime mover (2) to the pump device (1) In the case of a structure in which an electromagnetic clutch is provided, the light receiving element (8) is electrically connected to an operation controller (9) for controlling the coupling and disengagement of the clutch, and the pump device ( 1) may be driven, and the drive of the pump device (1) may be stopped when the clutch is disengaged. Further, as shown in FIG. 6, the pump device (1) for the liquid feed pipe (3) may be constructed. In the case of a liquid discharge device in which a return pipe (29) is connected to a side end and a solenoid valve (30) is interposed in the return pipe (29), the light receiving element (8) is connected to the solenoid valve (30). )
Is electrically connected to an operation controller (not shown) for controlling opening and closing, and only the solenoid valve (30) is controlled to be opened and closed, and the solenoid valve (30) is opened to discharge from the nozzle (4). The discharge pressure of the liquid may be low and the discharge pressure may be high by closing the solenoid valve (30). Alternatively, as shown in FIG. 7, a pump device for the liquid supply pipe (3) ( 1) A solenoid valve (31) and a bypass pipe (32) that bypasses the electric shaft valve (31) are provided at the side end, and a drug tank is provided in the bypass pipe (32) via an injector (33). In the case of a liquid discharge device in which (34) is in communication, the light receiving element (8) is connected to the solenoid valve (3
1) is electrically connected to an operation controller (not shown) that controls opening / closing, and only the solenoid valve (31) is opened / closed, and the pump device (1) is opened by closing the solenoid valve (31). ), The pressurized liquid discharged from the discharge port is flown into the bypass pipe (32) to inhale the drug from the drug tank (34) into the bypass pipe (32), and to mix the drug from the nozzle (4). The liquid may be discharged, or the prime mover (2), the electromagnetic clutch, the electromagnetic valve (30) provided on the pump device (1) side.
The operation of only one operating device such as (31) may be controlled, or the operations of a plurality of operating devices may be controlled. In this case, for example, as shown in FIG. 8, a plurality of light emitting parts (6
A) (6B) ... And a light emitting element (6) consisting of one output section (6Z) for outputting the optical signals emitted from these light emitting sections (6A) (6B) ... to the optical fiber (5), A plurality of switches (10) for operating the respective light emitting parts (6A) (6B) ...
A) (10B) ... and the pump device (1)
On the side, a light receiving element (8) having a discriminating section for discriminating the optical signal transmitted from the optical fiber (5) and a plurality of output terminals is provided, and each output terminal of the light receiving element (8) is connected to each of the output terminals. It is connected to an actuation controller for controlling the actuation of actuating devices so that the actuation of each of the actuating devices can be individually controlled by operating the switches (10A) (10B), or, although not shown, A plurality of sets of the optical fiber (6), the light emitting element (6), the light receiving element (8), and the switch (10) are provided corresponding to the number of actuating devices to be actuated, and the actuation of each actuating device is individually controlled. It is done as it is done.

Further, the switch (10) is used as the operating means for controlling the ON / OFF of the optical signal, but in addition to this, for example, a non-transmissive element is provided between the light emitting portion of the light emitting element (6) and the open end of the optical fiber (5). An optical body is movably provided, and the non-translucent body turns off the output of the optical signal to the optical fiber (5).
The optical fiber (5) is produced by moving the non-translucent body.
The opening end of the optical signal may be opened and the output of the optical signal to the optical fiber (5) may be turned on.

(Effects of the Invention) As described above, according to the present invention, while the operation of the operating device provided on the pump device (1) side can be remotely controlled, this control is performed by the optical fiber (5) and the light emitting element (6). ), Since the light receiving element (8) is used, it is possible to eliminate electric leakage at the portion of the liquid sending pipe (3) side, and there is no accident due to this electric leakage, and it is possible to improve safety. Since the optical signal is transmitted and controlled, the weight of the portion of the liquid delivery pipe (3) can be reduced in comparison with the remote control. Further, the operating device is a pump device (1).
In the case of a prime mover for driving the motor, it is not necessary to store high pressure in the liquid feed pipe (3) when the nozzle (4) is closed.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the device of the present invention, and FIG.
The figure is a cross-sectional view of only the nozzle side part, and Fig. 3 is an electric circuit diagram.
FIGS. 4 and 5 are explanatory views showing another embodiment only of the nozzle side portion, FIGS. 6 and 7 are explanatory views showing another embodiment only of the pump device side portion, and FIG. 8 is a plurality. 9 is an explanatory view showing an example of controlling the operation of the operating device, FIG. 9 is a sectional view of only the optical fiber take-out portion, and FIGS. 10 and 11 are explanatory views showing another embodiment only of the optical fiber take-out portion, FIG. FIG. 14 to FIG. 14 are explanatory views showing the seal structure of the optical fiber take-out portion. (1) …… Pump device (3) …… Liquid supply pipe (4) …… Nozzle (5) …… Optical fiber (6) …… Light emitting element (8) …… Light receiving element (9) …… Actuation controller

Claims (1)

[Claims] 1. A liquid discharge device comprising a pump device (1) operated by power from a prime mover, a nozzle (4), and a liquid delivery pipe (3) communicating with the pump device (1) and the nozzle (4). An optical fiber (5) is arranged between the pump device (1) side and the nozzle (4) side, and a light emitting element (6) for emitting an optical signal to the optical fiber (5), A light-receiving element (8) for receiving an optical signal transmitted by the optical fiber (5) is provided, and an operation controller for controlling the operation of an operating device provided with the light-receiving element (8) on the pump device (1) side ( 9), which is electrically connected to the nozzle (4) side, and is provided with an operating means for on / off controlling the output of the optical signal.