JP5403460B2 - Pump device - Google Patents

Description

  The present invention relates to a pump device that starts a prime mover according to a driving state of a prime mover that supplies power to the pump.

  The pump device that drives the pump by the power of the prime mover and discharges the liquid from the nozzle is small, has a large output, and is excellent in responsiveness. Therefore, it is used for cleaning the road surface and in the factory.

  Generally, a motor or an internal combustion engine is employed as a prime mover of a pump device. A pump device employing a motor can be quieter than a pump device employing an internal combustion engine, and by installing a control device in the pump device, the rotational speed of the motor can be adjusted as necessary. In addition, the driving of the pump can be appropriately controlled (see, for example, Patent Document 1).

In addition to the control device, when the detection means for detecting opening / closing of the nozzle is mounted on the pump device, when the detection means detects that the nozzle is closed, the motor stop signal is sent from the detection means to the control device. When the detection means detects that the nozzle is opened, the motor drive signal is output from the detection means to the control device, and the motor is driven only when the liquid is discharged. Can be reduced.
JP 2005-291179 A

  In consideration of long-time use of the motor and downsizing of the pump device, the pump device employing a motor is configured to be driven by receiving power from a power source that can be used for a long time, such as a commercial power source. If the commercial power supply cannot be secured, it cannot be used.

  For this reason, there is a demand for a pump device that can be used regardless of the presence or absence of a commercial power supply. To meet this demand, it is conceivable to replace the motor of the pump device with an internal combustion engine. Generally, a pump device including an internal combustion engine is in an idling state without stopping when the nozzle is closed during operation. By being in the idling state, when the nozzle is opened, the discharge of the liquid is resumed promptly. However, if the internal combustion engine is idling for a long time, the fuel consumption increases.

  In order to cope with this problem, the detection means and control device for detecting the opening and closing of the nozzle described above are mounted on a pump device equipped with an internal combustion engine, and the detection means detects when the nozzle is closed. When a stop signal of the internal combustion engine is output from the means to the control device, and it is detected by the detection means that the nozzle is opened, it is conceivable to output a drive signal of the internal combustion engine from the detection means to the control device. However, if the internal combustion engine is stopped each time the nozzle is closed, the liquid cannot be discharged promptly when the nozzle is opened.

  This invention is made | formed in view of such a situation, The place made into the objective is providing the pump apparatus which can aim at harmony with suppression of energy consumption, and quick resumption of discharge | release of a liquid. is there.

The pump device according to the present invention operates in accordance with a discharge part that discharges the liquid discharged from the pump, a delivery path that sends out the liquid from the pump to the discharge part, and a pressure in the delivery path. In a pump apparatus comprising: a discharge detection means for detecting the discharge of liquid from the section; a prime mover for supplying power to the pump; and a control means for controlling the drive of the prime mover based on a detection result of the discharge detection means. Drive state detection means for detecting the drive state of the prime mover is operated by the liquid discharged from the pump, and the detection results of the discharge detection means and the drive state detection means indicate that the prime mover is idling. Including detection results, the detection results of the release detection means and the drive state detection means indicate that the prime mover is idling and the release detection means Yes and to perform the stop of the prime mover if the detected that does not detect the release of liquid from the discharge portion at, the control means, the activation of the prime mover after the stop of the prime mover It has the starting means to perform.

  In the present invention, the control means for controlling the drive of the prime mover by providing the release detection means and the drive state detection means that operates by the power of the prime mover and detects the drive state of the prime mover includes the release detection Based on the detection results of the means and the drive state detection means, the drive state of the prime mover is appropriately determined, and the prime mover is started only when the prime mover is stopped.

  The pump device according to the present invention includes an contacting / separating body that contacts and separates from the driving state detecting unit according to a discharge pressure of the pump, and the driving state detecting unit is configured to A signal indicating that the discharge pressure of the pump is equal to or higher than a predetermined pressure is output.

  In the present invention, when the prime mover is driven and the liquid is discharged from the discharge portion, the pump is set so that the discharge pressure is equal to or higher than a predetermined pressure, and the contacting / separating body is connected to the pump, The contacting / separating body is brought into contact with and separated from the driving state detecting means according to the pump discharge pressure, and a signal indicating that the pump discharge pressure is equal to or higher than a predetermined pressure is output. For example, when the prime mover is driven and the liquid is discharged from the discharge portion, the contacting / separating body approaches the drive state detection unit, and the signal is output from the drive state detection unit. On the other hand, when the prime mover is in the idling state or the stopped state, the contacting / separating body is separated from the driving state detecting unit, and the output of the signal from the driving state detecting unit is stopped, so that the control unit is output from the driving state detecting unit. Further, the driving state of the prime mover can be determined by the signal.

  In the pump device according to the present invention, a predetermined time is set in advance, and after the output of the signal from the drive state detection unit stops, a timer that counts the predetermined time until the predetermined time elapses, and the discharge detection unit The discharge of the liquid from the discharge unit is not detected, and the output of the signal from the drive state detection means is stopped, and when the timer finishes timing, the motor And stop means for stopping driving.

  In the present invention, when the discharge detection means does not detect the discharge of the liquid from the discharge portion, and the output of the signal from the drive state detection means is stopped, the timer is The prime mover is idling when it is timing. For this reason, when the timer finishes timing, the driving of the prime mover is stopped to achieve harmony between the reduction of the energy consumption of the prime mover and the prompt resumption of liquid discharge.

  The pump device according to the present invention is characterized in that the timer is reset when the signal is output from the driving state detecting means before a predetermined time elapses after the start of timing.

  In the present invention, when the signal is output from the driving state detecting means after a predetermined time has elapsed after the start of timing, the timer is reset to prevent the timer from being timed. When the signal is output from the driving state detecting means, the liquid discharge from the discharge unit is resumed, so that the stop of the prime mover can be avoided by resetting the timer and the liquid discharge can be continued. it can. In addition, when the timer timing is restarted by resetting the timer, the timer counts not the remaining time at the time when the signal is output from the drive state detection means but the reset predetermined time. The timer does not end timing until a predetermined time elapses from the time when the vehicle enters the idling state.

  In the pump device according to the present invention, the start-up means is a case where the timer finishes timing, and the output of the signal from the drive state detection means is stopped, and the discharge detection means The prime mover is activated when the discharge of the liquid from the discharge portion is detected.

  In the present invention, the prime mover is stopped when the timer finishes timing and the output of the signal from the drive state detection means is stopped. The control means activates the prime mover only when the release detection means detects the discharge of the liquid from the discharge portion while the prime mover is stopped.

  In the pump device according to the present invention, the prime mover is an internal combustion engine, and is connected to the contact / separation body, and includes an adjustment valve that adjusts a fuel supply amount to the internal combustion engine, and the adjustment valve is connected to the contact / separation body. It is characterized by being operated by the body contacting / separating operation to adjust the fuel supply amount.

  In the present invention, an internal combustion engine is used as a prime mover, and an adjustment valve that adjusts the amount of fuel supplied to the internal combustion engine is connected to the contact / separation body to open and close the adjustment valve. For example, when the liquid is discharged from the discharge portion and the prime mover is driven, the contacting / separating body approaches the driving state detecting means, the adjustment valve is opened, and the amount of fuel supplied to the internal combustion engine increases. Further, when the discharge of the liquid from the discharge portion is stopped, the contacting / separating body is separated from the driving state detecting means, the adjustment valve is closed, and the amount of fuel supplied to the internal combustion engine is decreased.

  In the pump device according to the present invention, the prime mover is an internal combustion engine, and is connected to the pump, and is connected to the reciprocating unit that reciprocates according to the discharge pressure of the pump, and the reciprocating unit. And an adjustment valve that adjusts the amount of fuel supplied to the internal combustion engine. The adjustment valve is operated by a reciprocating operation of the reciprocating portion to adjust the amount of fuel supplied.

  In the present invention, an internal combustion engine is used as a prime mover, and an adjustment valve that adjusts the amount of fuel supplied to the internal combustion engine and a reciprocating unit that reciprocates according to the discharge pressure of the pump are connected to each other. Open and close. For example, when the liquid is discharged from the discharge part and the prime mover is driving, the reciprocation part moves forward, the regulating valve opens, the amount of fuel supplied to the internal combustion engine increases, and the liquid from the discharge part increases. When the discharge is stopped, the reciprocating unit moves backward, the adjustment valve is closed, and the amount of fuel supplied to the internal combustion engine decreases.

  In the pump device according to the present invention, the driving state detecting means includes a generator connected to the prime mover, and outputs an ON signal when the generator is driven, and the generator is not driven. In this case, an OFF signal is output.

  In the present invention, the driving state detection means outputs an ON signal indicating that the prime mover is driven when the generator is driven, and when the generator is not driven, Since the off signal indicating that the motor is not driven is output, the control means can determine whether or not the prime mover is driven based on the on signal or the off signal output from the switch.

  In the pump device according to the present invention, when the start-up means outputs an off signal from the drive state detection means, and the discharge detection means detects the discharge of the liquid from the discharge portion. Further, the prime mover is activated.

  In the present invention, the prime mover is stopped when an off signal is output from the drive state detection means. Thereafter, the control means activates the prime mover only when the discharge detection means detects the discharge of the liquid from the discharge portion.

  In the pump device according to the present invention, a predetermined time is set in advance, and a timer that measures time until a predetermined time elapses after the discharge detection unit detects that the liquid is not discharged from the discharge unit. And a stop means for stopping the driving of the prime mover when the release of the liquid from the discharge portion is not detected by the discharge detection means and the timer finishes timing. Features.

  In the present invention, the prime mover is in an idling state until a predetermined time elapses by the timer after it is detected that the liquid is not discharged from the discharge portion by the discharge detection means. After that, when the timer finishes timing, the driving of the prime mover is stopped, thereby achieving harmony between the prompt resumption of liquid discharge and the reduction of the energy consumption of the prime mover.

  The pump device according to the present invention is characterized in that the timer is reset when a discharge of the liquid is detected by the discharge detection means before a predetermined time elapses after the start of timing. .

  In the present invention, when the discharge detecting means detects the discharge of the liquid before the predetermined time elapses after the timer starts counting, the timer is reset and the timer counting ends. Stop. When the discharge detecting means detects the discharge of the liquid, the discharge of the liquid is resumed from the discharge portion, so that the stop of the prime mover can be avoided by resetting the timer, and the discharge of the liquid can be continued. . In addition, when the timer is restarted by resetting the timer, the timer counts the predetermined time that is reset, not the remaining time when the liquid is discharged from the discharge section, so that the prime mover is in an idling state. The timer does not finish counting until a predetermined time elapses from the point of time.

  In the pump device according to the present invention, the prime mover is an internal combustion engine, and is connected to the pump, and is connected to the reciprocating unit that reciprocates according to the discharge pressure of the pump, and the reciprocating unit. And an adjustment valve that adjusts the amount of fuel supplied to the internal combustion engine. The adjustment valve is operated by a reciprocating operation of the reciprocating portion to adjust the amount of fuel supplied.

  In the present invention, an internal combustion engine is used as a prime mover, and an adjustment valve that adjusts the amount of fuel supplied to the internal combustion engine and a reciprocating unit that reciprocates according to the discharge pressure of the pump are connected to each other. Open and close. For example, when the liquid is discharged from the discharge portion and the prime mover is driving, the reciprocating portion moves forward, the adjustment valve opens, and the amount of fuel supplied to the internal combustion engine increases. Further, when the discharge of the liquid from the discharge portion is stopped, the reciprocating portion is moved back to close the adjustment valve, and the amount of fuel supplied to the internal combustion engine is reduced.

  In the pump device according to the present invention, the control for controlling the drive of the prime mover is provided by providing the release detection means and the drive state detection means that operates by the power of the prime mover and detects the drive state of the prime mover. The means determines the drive state of the prime mover based on the detection results of the release detection means and the drive state detection means, starts the prime mover only when the prime mover is stopped, and suppresses energy consumption. Harmony with the prompt resumption of liquid discharge can be achieved.

(Embodiment 1)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a pump device according to Embodiment 1. FIG. 1 is a schematic diagram showing the conduit and wiring of the pump device, and FIG. 2 is a side sectional view schematically showing the configuration of the valve device.

  In the figure, 1 is a pump, and a suction port of the pump 1 and a tank 2 for storing liquid are connected via a suction pipe 3. A delivery pipe 4 for delivering liquid to the nozzle 5 is connected to the discharge port of the pump 1. The delivery pipe 4 is provided with a valve device 6 having a check valve 6a. The check valve 6a is interposed in the delivery pipe 4. When the nozzle 5 is closed, the pressure in the delivery pipe 4 increases and the check valve 6a is closed, and when the nozzle 5 is opened, the pressure in the delivery pipe 4 decreases. The check valve 6a is opened.

  The valve device 6 has a cylinder 6b. As shown in FIG. 1, the cylinder 6b is connected to the delivery pipe 4 via a passage 6e formed in the valve device 6 between the check valve 6a and the nozzle 5. A piston 6c is disposed in the cylinder 6b. The piston 6c is provided with a rod 6d along the axial direction of the cylinder 6b. The rod 6d is located on the opposite side of the passage 6e with the piston 6c in between. The tip of the rod 6d extends to the outside of the cylinder 6b.

  At the tip of the rod 6d, a cylinder 6f having a thread groove formed on the outer circumferential surface is provided. A pressure regulating spring 6g for adjusting the pressure in the cylinder 6b is attached to the tip of the rod 6d, and the pressure regulating spring 6g extends from the cylinder 6f. A bottomed cylindrical pressure regulating screw 6h having a thread groove formed on the inner peripheral surface so as to cover the extended end of the pressure regulating spring 6g is screwed into the cylinder 6f. The pressure adjusting screw 6h is rotated to adjust the elastic restoring force of the pressure adjusting spring 6g. The rod 6d can slide along the axial direction in the cylinder 6f.

  When the force that presses the piston 6c due to the hydraulic pressure is larger than the elastic restoring force of the pressure regulating spring 6g, the piston 6c moves to the rod 6d side, and the elastic restoring force of the pressure regulating spring 6g presses the piston 6c due to the hydraulic pressure When the force is larger than the force to be moved, the piston 6c moves toward the passage 6e.

  An adjusting device 10 for adjusting the opening / closing of an adjusting valve 36, which will be described later, is connected to the pump 1 via a connecting pipe 11. The adjusting device 10 has a cylinder 10a, and the cylinder 10a and the pump 1 are connected via a connecting pipe 11 as shown in FIG. A piston 10b is disposed in the cylinder 10a. A rod 10c is fixed to the piston 10b along the axial direction of the cylinder 10a. The rod 10c is located on the opposite side of the connecting pipe 11 with the piston 10b interposed therebetween. The tip of the rod 10c extends to the outside of the cylinder 10a. A contact / separation plate 10e that contacts and separates from a normally open type operation switch 14a, which will be described later, is fixed to the tip of the rod 10c. As shown in FIG. 1, an elastic body 10d is provided around the rod 10c between the rod 10c side of the piston 10b and the end of the cylinder 10a.

  When the force pressing the piston 10b due to the discharge pressure of the pump 1 is larger than the elastic restoring force of the elastic body 10d, the piston 10b moves to the rod 10c side, and the elastic restoring force of the elastic body 10d depends on the discharge pressure of the pump 1. When the force is greater than the force pressing the piston 10b, the piston 10b moves to the connecting pipe 11 side.

  The delivery pipe 4 and the tank 2 are connected by a spill pipe 13 as shown in FIG. When the check valve 6a is closed, the liquid returns from the delivery pipe 4 to the tank 2 through the spill pipe 13.

  An internal combustion engine 30 that supplies power to the pump 1 is connected to the pump 1. The internal combustion engine 30 is provided with a starter 31 having a cell motor, and the starter 31 is connected to a starter driving circuit 60 via a transmission line 50 for transmitting a signal. The starter drive circuit 60 is connected to a control device 40 that controls the drive of the internal combustion engine 30 via a transmission line 51. A nozzle opening / closing detector 9 for detecting opening / closing of the nozzle 5 is connected to the control device 40 via a transmission line 52.

FIG. 3 is a side view schematically showing the configuration of the nozzle open / close detector 9 and the moving plate.
The nozzle opening / closing detector 9 is disposed so as to face the side surface of the valve device 6. The nozzle open / close detector 9 has a press-type normally closed operation switch 9a protruding toward the side surface. The nozzle open / close detector 9 is connected to a power source (not shown), and when the normally closed operation switch 9a is pressed, a low voltage signal (hereinafter referred to as "L") is sent from the normally closed operation switch 9a to the control device 40. Is output. On the other hand, when the pressure on the normally closed operation switch 9a is released and the normally closed operation switch 9a returns to the original position, a high voltage signal (hereinafter referred to as “H”) is sent from the normally closed operation switch 9a to the control device 40. Is output.

  As shown in FIG. 3, a leaf spring 9 b is disposed between the normally closed operation switch 9 a and the side surface of the valve device 6. One end of the leaf spring 9b faces the normally closed operation switch 9a, and the other end of the leaf spring 9b is supported by a support portion 9d of the nozzle opening / closing detector 9. A roller 9c is provided integrally with the leaf spring 9b on the surface opposite to the normally closed operation switch 9a at one end of the leaf spring 9b. The peripheral surface of the roller 9c faces the side surface of the valve device 6. The axis of the roller 9c is orthogonal to the axis of the rod 6d of the valve device 6.

  A moving plate 8 along the side surface of the valve device 6 is pin-connected to the rod 6d of the valve device 6. The moving plate 8 reciprocates together with the rod 6d. As shown in FIG. 3, the moving plate 8 extends from a pin 7 fixed to the rod 6d toward the space between the roller 9c and the side surface, and an extending end portion of the moving plate 8 is a circumference of the roller 9c. It protrudes toward the roller 9c while curving in a hook shape along the surface.

  When the piston 6c of the valve device 6 moves to the rod 6d side and the hook portion of the moving plate 8 presses the roller 9c, the leaf spring 9b bends and presses the normally closed operation switch 9a. On the other hand, when the piston 6c moves toward the passage 6e and the hook portion of the moving plate 8 is separated from the roller 9c, the leaf spring 9b returns to the original position, and the normally closed operation switch 9a is also returned to the original position. Return.

  As shown in FIG. 1, the internal combustion engine 30 is connected to a carburetor 34 via an air supply pipe 33. The carburetor 34 is connected to a fuel tank 35 and an intake pipe 37 for taking in air. The intake pipe 37 is provided with an adjustment valve 36 for adjusting the amount of air taken into the carburetor 34. A link mechanism 39 is connected to the adjusting valve 36 via a wire 38a, and the link mechanism 39 is connected to the contacting / separating plate 10e of the adjusting device 10 via a wire 38b.

  When the piston 10b moves to the rod 10c side, the contact / separation plate 10e approaches a normally open type operation switch 14a, which will be described later, the opening of the adjustment valve 36 increases, and the amount of fuel supplied to the internal combustion engine 30 is reduced. Become more. When the piston 10b moves to the connecting pipe 11 side, the contact / separation plate 10e is separated from the normally open type operation switch 14a, the opening of the adjustment valve 36 is reduced, and the amount of fuel supplied to the internal combustion engine 30 is reduced. Less.

  The air supply pipe 33 is provided with an electromagnetic supply valve 32 that adjusts the supply amount of the air-fuel mixture containing air and fuel delivered from the carburetor 34 to the internal combustion engine 30. The supply valve 32 is connected to a supply valve opening / closing circuit 70 via a transmission line 55. By outputting a valve opening signal from the supply valve opening / closing circuit 70, a coil (not shown) of the supply valve 32 is excited and the supply valve 32 is opened. On the other hand, when the valve opening signal is output from the supply valve opening / closing circuit 70, the excitation of the coil is released, and the supply valve 32 is closed by the elastic return force of the spring (not shown) of the supply valve 32.

  The supply valve opening / closing circuit 70 is connected to the control device 40 via two transmission lines 53 and 54. A discharge pressure detector 14 for detecting the discharge pressure of the pump 1 is connected to the control device 40 via a transmission line 56.

FIG. 4 is a side view schematically showing the configuration of the discharge pressure detector 14 and the adjusting device 10.
The wire 38b is attached to one end of the contacting / separating plate 10e of the adjusting device 10. The discharge pressure detector 14 is disposed so as to face the surface opposite to the cylinder 10a at the other end of the contact / separation plate 10e. The discharge pressure detector 14 has a press-type normally open type operation switch 14a protruding toward the other end of the contact / separation plate 10e. The discharge pressure detector 14 is connected to a power source (not shown), and when the normally open type operation switch 14a is pressed by the approaching / separating plate 10e approaching the control device 40 from the normally open type operation switch 14a "H". Is output. On the other hand, when the contact / separation plate 10e is released to release the pressing to the normally open type operation switch 14a and the normally open type operation switch 14a returns to the original position, the control device 40 is transferred from the normally open type operation switch 14a. “L” is output.

  As shown in FIG. 4, a leaf spring 14b is disposed between the normally open type operation switch 14a and the contact / separation plate 10e. One end of the leaf spring 14b faces the normally open operation switch 14a, and the other end of the leaf spring 14b is supported by a support portion 14d of the discharge pressure detector 14. A roller 14c along the edge of one end of the leaf spring 14b is provided integrally with the leaf spring 14b on the surface of the end of the leaf spring 14b opposite to the normally open operation switch 14a.

  When the piston 10b of the adjusting device 10 moves to the rod 10c side and the contact / separation plate 10e presses the roller 14c, the leaf spring 14b bends and presses the normally open operation switch 14a. On the other hand, when the piston 10b moves to the opposite side of the rod 10c and the contacting / separating plate 10e moves away from the roller 14c, the leaf spring 14b returns to its original position, and the normally open operation switch 14a also returns to its original position. Return.

With the above configuration, a voltage signal is input from the nozzle opening / closing detector 9 and the discharge pressure detector 14 to the control device 40, and a control signal for controlling the operation of the starter 31 and the supply valve 32 is transmitted from the control device 40 to the starter drive circuit 60 and Each is output to the supply valve opening / closing circuit 70.
FIG. 5 is a circuit diagram showing the configuration of the control device 40. In the figure, V _OS is an output signal of the normally open type operation switch 14a, V _CS is an output signal of the normally closed type operation switch 9a, V _T is an output signal of a Q terminal of an RS flip-flop circuit described later, and V _CC is a power supply voltage. . The control device 40 includes a step-down detection circuit 100, a timer 200, a valve closing signal generation circuit 300, a boost detection circuit 400, a drive signal generation circuit 500, and a boost detection circuit 600.

The step-down detection circuit 100 includes a NOT element 101, a resistor 102, a capacitor 103, and a 2-input 1-output NOR element 104. A normally open type operation switch 14a is connected to one input terminal of the NOR element 104 and an input terminal of the NOT element 101, respectively. The output terminal of the NOT element 101 is connected to one end of the resistor 102. The other end of the resistor 102 is connected to one end of the capacitor 103 and the other input terminal of the NOR element 104, respectively. The output terminal of the NOR element 104 is connected to the timer 200. The other end of the capacitor 103 is grounded.
The step-down detection circuit 100 outputs a single pulse of “H” from the output terminal of the NOR element 104 when the output signal V _OS of the normally open operation switch 14a is switched from “H” to “L”.

The timer 200 has an npn type transistor 201. The base of the transistor 201 is connected to the output terminal of the NOR element 104, and the emitter of the transistor 201 is grounded. One end of a resistor 202 is connected to the collector of the transistor 201. A power supply (not shown) is connected to the other end of the resistor 202, and a power supply voltage _Vcc is applied.

  The timer 200 has a capacitor 203, and one end of the capacitor 203 is grounded. The other end of the capacitor 203 is connected to one end of a resistor 204, and the other end of the resistor 204 is connected to a power source. The timer 200 has a first resistor 205 to a third resistor 207 connected in series as shown in FIG. One end of the first resistor 205 is connected to the power source, and the other end of the first resistor 205 is connected to one end of the second resistor 206. The other end of the second resistor 206 is connected to one end of the third resistor 207, and the other end of the third resistor 207 is grounded.

  The timer 200 has a first operational amplifier 208. The negative terminal of the first operational amplifier 208 is connected between the first resistor 205 and the second resistor 206, and the positive terminal of the first operational amplifier 208 is connected between the capacitor 203 and the resistor 204. is there. The timer 200 has a second operational amplifier 209. The positive terminal of the second operational amplifier 209 is connected between the second resistor 206 and the third resistor 207, and the negative terminal of the second operational amplifier 209 is connected between the resistor 202 and the transistor 201. .

  The timer 200 has an RS flip-flop circuit 210. An output terminal of the first operational amplifier 208 is connected to a reset terminal (hereinafter referred to as R terminal) of the RS flip-flop circuit 210, and a set terminal (hereinafter referred to as S terminal) of the RS flip-flop circuit 210 is connected to the second operational amplifier. 206 output terminals are connected. The collector of an npn transistor 211 is connected to a forced reset terminal (hereinafter referred to as #R terminal) of the RS flip-flop circuit 210. A normally open operation switch 14a is connected to the gate of the transistor 211, and the emitter of the transistor 211 is grounded.

  The output terminal (hereinafter referred to as Q terminal) of the RS flip-flop circuit 210 is connected to the output terminal of the timer 200. The inverting output terminal (hereinafter referred to as #Q terminal) of the RS flip-flop circuit 210 is connected to the gate of the npn transistor 212. The collector of the transistor 212 is connected between the resistor 204 and the capacitor 203, and the emitter of the transistor 212 is grounded.

In the timer 200, when a single pulse “H” is input from the NOR element 104 of the step-down detection circuit 100, the transistor 201 is turned on for a short time. Due to this conduction, the negative terminal of the second operational amplifier 209 is grounded, “H” is output from the second operational amplifier 209, and “H” is input to the S terminal of the RS flip-flop circuit 210. In this case, the output signal V _{T at the} Q terminal becomes “H”, and the output signal at the #Q terminal becomes “L”. When the output signal at the #Q terminal is "L", the transistor 212 is not turned on and the capacitor 203 is not grounded, so that the capacitor 203 is charged.

When the charging of the capacitor 203 is completed, “H” is input to the positive terminal of the first operational amplifier, and “H” is output from the first operational amplifier. Then, “H” is input to the R terminal of the RS flip-flop circuit 210. When “H” is input to the R terminal, the output signal V _T of the Q terminal becomes “L” and the output signal of the #Q terminal becomes “H”. When the output signal at the #Q terminal becomes “H”, the transistor 212 becomes conductive, and the capacitor 203 is grounded and discharged.

With the above configuration, the output signal V _{T at the} Q terminal is “H” from the time when a single pulse “H” is input from the NOR element of the step-down detection circuit 100 to the transistor 201 until the charging of the capacitor 203 is completed. Becomes “L” when the charging of the capacitor 203 is finished. When a single pulse “H” is input again from the NOR element after the capacitor has been charged, the capacitor is charged again, the output signal V _T of the Q terminal becomes “H”, and the #Q terminal The output signal is “L”.

When the output signal V _OS input to the gate of the transistor 211 is “H”, the transistor is turned on and the #R terminal of the RS flip-flop circuit 210 is grounded. When the #R terminal is grounded, the output signal V _{T at} the Q terminal is “L” and the output signal at the #Q terminal is “H”.

  The Q terminal is connected to the valve closing signal generating circuit 300. The valve closing signal generation circuit 300 includes a NOT element 301, a 2-input 1-output NOR element 302, and a 2-input 1-output AND element 303. The input terminal of the NOT element 301 is connected to the Q terminal, and the output terminal of the NOT element 301 is connected to one input terminal of the AND element 303. One input terminal of the NOR element 302 is connected to the normally open type operation switch 14a, and the other input terminal of the NOR element 302 is connected to the normally closed type operation switch 9a. The output terminal of the NOR element 302 is connected to the other input terminal of the AND element 303. An output terminal of the AND element 303 is connected to the boost detection circuit 400.

  The boost detection circuit 400 includes a NOT element 401, a resistor 402, a capacitor 403, and an AND element 404 with two inputs and one output. The input terminal of the NOT element 401 is connected to the output terminal of the AND element 303, and the output terminal of the NOT element 401 is connected to one end of the resistor 402. The other end of the resistor 402 is connected to one end of the capacitor 403 and one input terminal of the AND element 404. The other end of the capacitor 403 is grounded. The other input terminal of the AND element 404 is connected to the output terminal of the AND element 303 of the valve closing signal generation circuit 300. The output terminal of the AND element 404 is connected to the supply valve opening / closing circuit 70 via the transmission line 53.

When the output signal V _OS of the normally open type operation switch 14a, the output signal V _{CS of} the normally closed type operation switch 9a, and the output signal V _{T of the} Q terminal are all "L", the valve closing signal generation circuit 300 “H” is output from the AND element 303 to the boost detection circuit 400. At this time, the signal from the AND element 303 input to the NOT element 401 and the AND element 404 is switched from “L” to “H”, so that a single pulse “H” from the AND element 404 to the supply valve switching circuit 70. Is output. In response to the input of the single pulse “H”, the supply valve opening / closing circuit 70 outputs a valve closing signal.

  The Q terminal is further connected to the drive signal generation circuit 500. The drive signal generation circuit 500 includes a NOT element 501 and a 2-input 1-output NOR element 502. The input terminal of the NOT element 501 is connected to the normally closed operation switch 9a, and the output terminal of the NOT element 501 is connected to one input terminal of the NOR element 502. The other input terminal of the NOR element 502 is connected to the Q terminal, and the output terminal of the NOR element 502 is connected to the boost detection circuit 600.

  The boost detection circuit 600 includes a NOT element 601, a resistor 602, a capacitor 603, and a 2-input 1-output AND element 604. The configuration of the boost detection circuit 600 is such that the output terminal of the AND element 604 is connected to the supply valve opening / closing circuit 70 via the transmission line 54, and is connected to the starter driving circuit 60 via the transmission line 51. The configuration is the same as that of the boost detection circuit 400, and detailed description thereof is omitted.

When the output signal V _{T at the} Q terminal is “L” and the output signal V _CS of the normally closed operation switch 9a is “H”, “H” is detected as a boost from the NOR element 502 of the drive signal generation circuit 500. It is output to the circuit 600. At this time, the signal from the NOR element 502 inputted to the NOT element 601 and the AND element 604 switches from “L” to “H”, and the single pulse “H” from the AND element 604 is supplied to the supply valve switching circuit 70 and the starter. It is output to the drive circuit 60. In response to the input of the single pulse “H”, the supply valve opening / closing circuit 70 outputs a valve opening signal, and the starter driving circuit 60 outputs a driving signal. The starter 31 is driven for a predetermined time by the drive signal.

Next, the operation of the pump device will be described. 6 is a time chart showing the operation states of the control device 40, the starter 31, the moving plate 8, the contact / separation plate 10e and the nozzle 5 and the levels of the respective output signals in time series. FIG. 7 is a broken line (1 in FIG. ) To (8), the output signal V _OS of the normally open type operation switch, the output signal V _{CS of the} normally closed type operation switch, and the output signal V _T of the Q terminal ("H" or ""). It is a chart showing L ″).
In FIG. 6, “drive” and “stop” in the column of the starter and the internal combustion engine respectively indicate the drive and stop states of the starter 31 and the internal combustion engine 30, and “approach” and “separation” in the column of the movement plate indicate the movement plate 8. Indicates the approach / separation state of the normally closed operation switch 9a, and “approach” / “separation” in the column of the contact / separation plate indicates the approach / separation state of the contact / separation plate 10e to the normally open operation switch 14a. “Open” and “Closed” in the nozzle column indicate the open / closed state of the nozzle 5, and “H” and “L” in the V _OS , V _CS and V _T columns indicate the output signal V _OS and the output signal. The signal levels of V _CS and output signal V _T are shown.

Further, in the range indicated by “key start” and an arrow in FIG. 6, the operation state of the starter 31 and the level of each output signal when the ignition key is turned on are shown in time series. In addition, the operation state of the starter 31 and the level of each output signal when the ignition key is turned off are shown in time series in a range indicated by “key stop” and an arrow. In addition, the operation state of the starter 31 and the level of each output signal from the time when the ignition key is turned on to the time when the ignition key is turned off are shown in a time series in the range indicated by “running” and arrows. .
Note that (1) to (8) shown in FIG. 7 correspond to the time points indicated by broken lines (1) to (8) in FIG. 5) is common, and Table (3) and Table (8) are common.

When an ignition key (not shown) is turned on with the nozzle 5 closed, the starter 31 is driven for a predetermined time as shown in FIG. 6, and the internal combustion engine 30 is in an idling state. The opening operation switch 14a is operated, and the timer 200 starts counting, so that the output signal V _OS , the output signal V _CS , and the output signal V _T become “L”, “H”, and “L”, respectively ( The time point indicated by the broken line (1) in FIG. 6 and the table (1) in FIG. 7). When the nozzle 5 is opened before the timer 200 finishes measuring the predetermined time, the moving plate 8 is separated from the nozzle opening / closing detector 9, the normally closed operation switch 9a is operated, and the output signal V _CS Becomes “H” (see the time indicated by the broken line (2) in FIG. 6 and the table (2) in FIG. 7). At this time, the drive signal generation circuit 500 outputs “L” and the starter 31 is not driven.

When the nozzle 5 is kept open, the contact / separation plate 10e approaches the discharge pressure detector 14, the normally open type operation switch 14a is operated, and the output signal V _OS becomes "H". . Also, the #R terminal of the flip-flop circuit 210 becomes "L", the capacitor 203 is discharged, the timer 200 is reset, and the output signal V _T becomes "L" (at the time indicated by the broken line (3) in FIG. 6). And Table (3) in FIG. 7).

When the nozzle 5 is closed, the pressure in the delivery pipe 4 rises, and the piston 6c moves to the rod 6d side, the moving plate 8 approaches the nozzle opening / closing detector 9, and the normally closed operation switch 9a is operated, and the output signal V _CS becomes “L” (see the time indicated by the broken line (4) in FIG. 6 and the table (4) in FIG. 7). If the state where the nozzle 5 is closed is continued, the contact Hanareban 10e is separated from the discharge pressure detector 14, the normally open type operation switch 14a is an operation, the output signal V _OS becomes "L" Then, the timer 200 starts measuring, and the output signal V _T becomes “H” (see the time indicated by the broken line (5) in FIG. 6 and the table (5) in FIG. 7). At this time, the internal combustion engine 30 is in an idling state.

When the internal combustion engine 30 is in an idling state and the timer 200 finishes measuring a predetermined time, the output signal V _T becomes “L” (at the time indicated by the broken line (6) in FIG. 6). And Table (6) in FIG. 7). At this time, "H" is output from the valve closing signal generation circuit 300, the supply valve 32 is closed, and the driving of the internal combustion engine 30 is stopped.

When the nozzle 5 is opened after the driving of the internal combustion engine 30 is stopped, the moving plate 8 is separated from the nozzle opening / closing detector 9, the normally closed operation switch 9a is operated, and the output signal _VCS is "H". (See the time indicated by the broken line (7) in FIG. 6 and the table (7) in FIG. 7). At this time, “H” is output from the drive signal generation circuit 500, the supply valve 32 is opened, the starter 31 is driven, and the internal combustion engine 30 is driven. When the internal combustion engine 30 is driven with the nozzle 5 opened, the discharge pressure of the pump 1 rises. Therefore, as described above, the contacting / separating plate 10e approaches the discharge pressure detector 14, The normally open operation switch 14a is operated, and the output signal V _OS becomes “H” (see the time indicated by the broken line (8) in FIG. 6 and the table (8) in FIG. 7). When the ignition key is turned off, the driving of the internal combustion engine 30 is stopped as shown in FIG.

  In the pump device according to the first embodiment, by providing the contact / separation plate 10e that contacts and separates from the normally open type operation switch 14a of the discharge pressure detector 14, the liquid is discharged from the nozzle 5, and the internal combustion engine 30 is provided. Is driven, the contact / separation plate 10e approaches the normally open operation switch 14a, and "H" is output from the normally open operation switch 14a. On the other hand, when the internal combustion engine 30 is in an idling state or a stopped state, the contact / separation plate 10e is separated from the normally open type operation switch 14a, and "L" is output from the normally open type operation switch 14a. For this reason, the control device 40 appropriately determines the driving state of the internal combustion engine 30 based on the “H” or “L”, and harmonizes the reduction of the fuel consumption of the internal combustion engine 30 and the prompt resumption of liquid discharge. Can be achieved.

  Further, the discharge of liquid from the nozzle 5 is not detected by the nozzle open / close detector 9, and a predetermined time elapses in the timer 200 after "L" is output from the normally closed operation switch 9a. In the meantime, the internal combustion engine 30 is idling. By stopping the driving of the internal combustion engine 30 when the timer 200 finishes timing, the reduction of the fuel consumption of the internal combustion engine 30 and the prompt resumption of liquid discharge can be achieved.

  In addition, when the timer 200 outputs “H” from the normally open operation switch 14a before the predetermined time has elapsed after the start of timing, the timer 200 is reset to prevent the internal combustion engine 30 from being stopped. it can. In addition, when timer 200 is reset by resetting timer 200, timer 200 counts the reset predetermined time, not the remaining time at the time of stopping timing, so internal combustion engine 30 is idling. It is possible to prevent the timer 200 from timing until a predetermined time elapses from when the internal combustion engine 30 is reached and to stop driving the internal combustion engine 30.

  The internal combustion engine 30 is stopped when the timer 200 has finished timing and "L" is output from the normally open operation switch 14a. Thereafter, when "H" is output from the normally closed operation switch 9a, the control device 40 starts driving the starter 31. For this reason, the control device 40 drives the starter 31 only when the internal combustion engine 30 is stopped to achieve harmony between the reduction of the fuel consumption of the internal combustion engine 30 and the prompt resumption of liquid discharge. Can do. Further, when the internal combustion engine 30 is in the idling state, the starter 31 is driven and knocking of the internal combustion engine 30 can be avoided.

  Further, by connecting the contact / separation plate 10e to an adjustment valve 36 that adjusts the amount of fuel supplied to the internal combustion engine 30, the contact / separation plate 10e is normally used when the nozzle 5 is opened and the internal combustion engine 30 is driven. Since the adjustment valve 36 is opened and the amount of fuel supplied to the internal combustion engine 30 gradually increases as it approaches the open operation switch 14a, the normally open operation switch 14a and the adjustment valve 36 are operated at the same time. The combustion efficiency of can be improved. Further, when the nozzle 5 is closed, the contact / separation plate 10e is separated from the normally open type operation switch 14a and the adjustment valve 36 is closed so that the amount of fuel supplied to the internal combustion engine 30 is reduced. Can reduce the load.

  Although the internal combustion engine 30 is used in the pump device according to the first embodiment, a motor may be applied instead of the internal combustion engine 30. In this case, instead of the starter drive circuit 60 and the supply valve opening / closing circuit 70, a motor drive circuit is provided, and when "H" is input from the boost detection circuit 600, power is supplied from the motor drive circuit to the motor, and the boost detection circuit When “H” is input from 400, the power supply from the motor drive circuit is stopped.

  Further, instead of the normally open operation switch 14a, an optical sensor, an ultrasonic sensor, or the like may be provided, and the contact / separation of the contact / separation plate 10e may be detected by the optical sensor or the like. Alternatively, a normally closed operation switch may be provided instead of the normally open operation switch 14a, the connecting pipe 11 may be connected to the cylinder 10a on the rod 10c side of the piston 10b, and the elastic body 10d may be disposed on the opposite side of the rod 10c. good. In this case, when the discharge pressure of the pump 1 is equal to or higher than the predetermined pressure, the contact / separation plate 10e is separated from the normally closed operation switch, and "H" is output from the normally closed operation switch, and the discharge pressure of the pump 1 is less than the predetermined pressure. In this case, the contact / separation plate 10e approaches the normally closed operation switch, and "L" is output from the normally closed operation switch. Further, instead of the water discharge pressure detector 14, a pressure sensor may be disposed at the discharge port of the pump 1, and the driving of the internal combustion engine 30 may be controlled based on the output of the pressure sensor.

  Further, an adjustment valve 36 may be interposed in the air supply pipe 33 to adjust the flow rate of the air-fuel mixture. The control device 40 may use an MPU (Micro Processing Unit). In addition, an ECU (Engine Control Unit) is used for the control device 40, and an injection device for supplying fuel controlled by the ECU instead of the carburetor 34 and an opening detection sensor for detecting the opening of the adjusting valve 36 are provided. May be. In this case, the injection device is controlled based on the output of the opening detection sensor, and the amount of fuel supplied to the internal combustion engine 30 is adjusted.

  Further, the normally open type operation switch 14a and the normally closed type operation switch 9a are not limited to the push type, and may be volume switches. In this case, the volume switch and the adjusting device 10 may be connected by a link. Further, without connecting the contact / separation plate 10e to the adjusting valve 36, a reciprocating portion that reciprocates according to the discharge pressure of the pump 1 is provided separately, and the reciprocating portion is connected to the adjusting valve 36 via the link mechanism 39. The opening / closing of the regulating valve 36 may be adjusted. Further, a water channel part having a water channel that performs the same function as the delivery pipe 4, the spillage pipe 13, and the connecting pipe 11 may be provided, and the water channel part may be used in place of the pipes.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a pump device according to a second embodiment. FIG. 8 is a schematic diagram showing the conduit and wiring of the pump device.

  A reciprocating portion 10f is provided at the tip of the rod 10c. The reciprocating portion 10f is connected to the regulating valve 36 through the wires 38a and 38b and the link mechanism 39. The reciprocating part 10f reciprocates together with the rod 10c in accordance with the discharge pressure of the pump 1. When the discharge pressure of the pump 1 increases, the reciprocating part 10f moves to open the adjustment valve 36, and when the discharge pressure of the pump 1 decreases, the reciprocating part 10f moves to close the adjustment valve 36.

An alternator 80 is connected to the control device 40 via a transmission line 56, and the alternator 80 is connected to the internal combustion engine 30. A resistor 57 is interposed in the transmission line 56. The alternator 80 generates power when the internal combustion engine 30 is driven. The generated voltage of the alternator 80 is stepped down by the resistor 57. The lowered generated voltage is input to the control device 40 as an output signal V _AL of the alternator 80 indicating whether or not the internal combustion engine 30 is driven. The output signal V _AL becomes “H” when the internal combustion engine 30 is driven, and the output signal V _AL becomes “L” when the internal combustion engine 30 is stopped.

FIG. 9 is a circuit diagram showing the configuration of the control device 40.
A normally closed operation switch 9a is connected to the NOT element 101 and the NOR element 104 of the step-down detection circuit 100 of the control device 40, and a normally closed operation switch 9a is connected to the gate of the transistor 211 of the timer 200. The output signal V _CS is input to the NOT element 101, the NOR element 104, and the transistor 211.

The step-down detection circuit 100 outputs a single pulse of “H” from the output terminal of the NOR element 104 when the output signal V _CS is switched from “H” to “L”.
When a single pulse “H” is input from the NOR element 104 of the step-down detection circuit 100, the timer 200 starts measuring time as described in the first embodiment, and the output signal V _T at the Q terminal is “H”. Further, when the timing is finished, the output signal V _T at the Q terminal becomes “L”. When the output signal V _CS input to the gate of the transistor 211 is “H”, the output signal V _{T at the} Q terminal is “L”.

The control device 40 includes a valve closing signal generation circuit 700. The valve closing signal generation circuit 700 has a NOR element 701 having two inputs and one output. A normally closed operation switch 9a is connected to one input terminal of the NOR element 701. The Q terminal of the RS flip-flop circuit 210 is connected to the other input terminal of the NOR element 701. The NOR element 701 receives the output signal V _CS and the output signal V _T. The output terminal of the NOR element 701 is connected to the input terminal of the NOT element 401 and the AND element 404 of the booster circuit 400, respectively.

When both the output signal V _T and the output signal V _CS are “L”, “H” is output from the NOR element 701 to the boost detection circuit 400, and as described in the first embodiment, the boost detection circuit 400. Is output to the supply valve opening / closing circuit 70, and the supply valve opening / closing circuit 70 outputs a valve closing signal.

The control device 40 further includes a drive signal generation circuit 800. The drive signal generation circuit 800 includes a NOT element 801 and a 2-input 1-output AND element 802. The input terminal of the NOT element 801 is connected to the alternator 80. The output terminal of the NOT element 801 is connected to one input terminal of the AND element 802. A normally closed operation switch 9a is connected to the other input terminal of the AND element 802. An output signal V _AL is input to the NOT element 801. The AND element 802 receives the output signal V _CS and the output signal of the NOT element 801.
The output signal of the AND element 802 is input to the NOT element 601 and the AND element 604 of the boost detection circuit 600, respectively.

When the output signal V _AL input to the NOT element 801 is “L” and the output signal V _CS input to the AND element 802 is “H”, the AND element 802 outputs “H”. As described in the first embodiment, a single pulse “H” is output from the AND element 604 to the supply valve opening / closing circuit 70 and the starter driving circuit 60, and the supply valve opening / closing circuit 70 outputs a valve opening signal, The starter drive circuit 60 outputs a drive signal.

Next, the operation of the pump device will be described. 10 is a time chart showing the operation states of the control device 40, the starter 31, the moving plate 8, and the nozzle 5 and the levels of the respective output signals in time series, and FIG. 11 is a broken line (1) to (6) in FIG. 10 is a chart showing the levels of the output signal V _CS of the normally closed operation switch, the output signal V _T of the Q terminal, and the output signal V _AL of the alternator at each time point indicated by (). In Figure 6, "H", "L" in the column of V _AL indicates the signal level of the output signal V _AL. In addition, (1)-(6) attached | subjected to each table | surface of FIG. 11 respond | corresponds to the time shown with the broken lines (1)-(6) in FIG. 10, and table | surface (1) of FIG. And Table (3) are common, and Table (2) and Table (6) are common.

When an ignition key (not shown) is turned on with the nozzle 5 closed, the starter 31 is driven for a predetermined time as shown in FIG. 10, the internal combustion engine 30 is in an idling state, and the normally closed operation switch 9a is operated. When the timer 200 starts counting, the output signal V _CS , the output signal V _T, and the output signal V _AL become “L”, “H”, and “H”, respectively (indicated by the broken line (1) in FIG. 10). And the table (1) in FIG. 11). When the nozzle 5 is opened before the timer 200 finishes measuring the predetermined time, the moving plate 8 is separated from the nozzle opening / closing detector 9, the normally closed operation switch 9a is operated, and the output signal V _CS Becomes “H”, and the output signal V _T becomes “L” (see the time indicated by the broken line (2) in FIG. 10 and the table (2) in FIG. 11). At this time, the drive signal generation circuit 800 outputs “L” and the starter 31 is not driven. Since the #R terminal of the flip-flop circuit 210 becomes “L”, the capacitor 203 is discharged and the timer 200 is reset.

When the nozzle 5 is closed, the moving plate 8 approaches the nozzle opening / closing detector 9, the normally closed operation switch 9a is operated, the output signal V _CS becomes "L", and the output signal V _T becomes "H". ″ (See the time indicated by the broken line (3) in FIG. 10 and the table (3) in FIG. 11). At this time, the internal combustion engine 30 is in an idling state.

When the internal combustion engine 30 is idling and the timer 200 finishes counting a predetermined time, the output signal V _T becomes “L”. At this time, "H" is output from the valve closing signal generation circuit 700, the supply valve 32 is closed, and the driving of the internal combustion engine 30 is stopped. When the drive of the internal combustion engine 30 is stopped, the drive of the alternator 80 is stopped, so that the output signal V _AL becomes “L” (at the time indicated by the broken line (4) in FIG. 10 and the table (4) in FIG. 11). reference).

When the nozzle 5 is opened after the driving of the internal combustion engine 30 is stopped, the moving plate 8 is separated from the nozzle opening / closing detector 9, the normally closed operation switch 9a is operated, and the output signal _VCS is "H". (See the time indicated by the broken line (5) in FIG. 10 and the table (5) in FIG. 11). At this time, “H” is output from the drive signal generation circuit 800, the supply valve 32 is opened, the starter 31 is driven, and the internal combustion engine 30 is driven. When the internal combustion engine 30 is driven, the alternator 80 is also driven, so that the output signal V _AL becomes “H” (see the time indicated by the broken line (6) in FIG. 10 and the table (6) in FIG. 11). When the ignition key is turned off, the driving of the internal combustion engine 30 is stopped as shown in FIG.

In the pump device according to the second embodiment, the output signal V _AL of the alternator 80 becomes “H” when the internal combustion engine 30 is driven, and becomes “L” when the internal combustion engine 30 is stopped. Therefore, the control device 40 can determine whether or not the internal combustion engine 30 is driven based on the output signal V _AL , and can achieve harmony between the reduction of the fuel consumption of the internal combustion engine 30 and the quick resumption of liquid discharge.

When the output signal V _{AL of the} alternator 80 is "L" and "L" is output from the normally closed operation switch 9a, the internal combustion engine 30 is stopped. Thereafter, when "H" is output from the normally closed operation switch 9a, the control device 40 starts driving the starter 31. Therefore, the control device 40 drives the starter 31 only when the internal combustion engine 30 is stopped, and the starter 31 is driven when the internal combustion engine 30 is in an idling state, and knocking occurs in the internal combustion engine 30. Can be avoided.

  The internal combustion engine 30 is idling until a predetermined time elapses after the timer 200 outputs "L" from the normally closed operation switch 9a. By stopping the driving of the internal combustion engine 30 when the timer 200 finishes timing, it is possible to achieve harmony between the reduction of the energy consumption of the internal combustion engine 30 and the quick resumption of liquid discharge.

  Further, when “H” is output from the normally closed operation switch 9a before the predetermined time has elapsed after the timer 200 starts measuring, the discharge of the liquid from the nozzle 5 is resumed. At this time, the timer 200 is reset to prevent the internal combustion engine 30 from stopping. In addition, when the timer 200 is restarted by resetting the timer 200, the timer 200 counts not the remaining time when the timing is stopped, but the reset predetermined time, so that the internal combustion engine 30 is idling. It is possible to prevent the timer 200 from timing until the predetermined time elapses from when the internal combustion engine 30 is reached, and the internal combustion engine 30 to stop driving.

  Further, by connecting the adjusting valve 36 and the reciprocating portion 10f, when the nozzle 5 is opened and the discharge pressure of the pump 1 is increased, the reciprocating portion 10f is moved and the adjusting valve 36 is opened, and the internal combustion engine is opened. Since the amount of fuel supplied to the engine 30 gradually increases, the combustion efficiency of the internal combustion engine 30 can be improved. Further, when the nozzle 5 is closed and the discharge pressure of the pump 1 is lowered, the reciprocating portion 10f is moved and the adjustment valve 36 is closed, so that the amount of fuel supplied to the internal combustion engine 30 is reduced. The load on the engine 30 can be reduced.

  Although the alternator 80 is used in the pump device according to the second embodiment, other generators such as dynamo may be used instead of the alternator 80. Further, the control device 40 of the pump device according to the first embodiment and the second embodiment is configured with positive logic, but may be configured with negative logic, and is configured with another circuit having an equivalent function. May be.

  Among the configurations of the pump device according to the second embodiment, the same reference numerals are given to the same configurations as those of the first embodiment, and detailed description thereof is omitted.

FIG. 3 is a schematic diagram showing a pipeline and wiring of the pump device according to the first embodiment. 2 is a side cross-sectional view schematically showing a configuration of a valve device of the pump device according to Embodiment 1. FIG. 3 is a side view schematically showing configurations of a nozzle opening / closing detector and a moving plate of the pump device according to Embodiment 1. FIG. FIG. 3 is a side view schematically showing configurations of a discharge pressure detector and an adjustment device of the pump device according to the first embodiment. FIG. 3 is a circuit diagram illustrating a configuration of a control device of the pump device according to the first embodiment. 3 is a time chart showing the operation states of the control device, starter, moving plate, contact / separation plate and nozzle of the pump device according to Embodiment 1 and the levels of the respective output signals in time series. FIG. 7 is a chart showing signal levels of an output signal of a normally open operation switch, an output signal of a normally closed operation switch, and an output signal of a Q terminal at each time point indicated by broken lines (1) to (8) in FIG. 6. It is a schematic diagram which shows the pipe line and wiring of the pump apparatus which concern on Embodiment 2. 6 is a circuit diagram illustrating a configuration of a control device of a pump device according to Embodiment 2. FIG. 10 is a time chart showing the operation states of the control device, starter, moving plate, and nozzle of the pump device according to Embodiment 2 and the level of each output signal in time series. 11 is a chart showing levels of an output signal of a normally closed operation switch, an output signal of a Q terminal, and an output signal of an alternator at each time point indicated by broken lines (1) to (6) in FIG.

Explanation of symbols

1 Pump 5 Nozzle (discharge part)
4 Delivery pipe (delivery path)
9 Nozzle open / close detector (discharge detection means)
10e Contact / separation plate (contact / separation body)
10f reciprocating part
14 Discharge pressure detector (drive state detection means)
14a Normally open operation switch (switch)
30 Internal combustion engine
36 Regulating valve
40 Control device (control means)
80 Alternator (generator)
200 timer
300, 700 Valve closing signal generation circuit (stopping means)
500, 800 Drive signal generation circuit (starting means)

Claims (12)

A discharge part that discharges the liquid discharged from the pump, a delivery path that sends the liquid from the pump to the discharge part, and an operation according to the pressure in the delivery path, detects the release of the liquid from the discharge part A pump device comprising: a discharge detecting means that performs power; a prime mover that supplies power to the pump; and a control means that controls the drive of the prime mover based on a detection result of the discharge detection means.
Drive state detection means that operates by the liquid discharged from the pump and detects the drive state of the prime mover,
The detection results of the discharge detection means and the drive state detection means include detection results indicating that the prime mover is idling,
The detection results of the discharge detection means and the drive state detection means indicate that the prime mover is idling, and the discharge detection means detects that the discharge of the liquid from the discharge portion is not detected. And the prime mover is stopped when
The said control means is provided with the starting means which starts the said motor | power_engine after the said stop of the said motor | power_engine, The pump apparatus characterized by the above-mentioned. A contact / separation body that contacts and separates from the driving state detection means according to the discharge pressure of the pump,
2. The drive state detection unit outputs a signal indicating that the discharge pressure of the pump is equal to or higher than a predetermined pressure when the contact / separation body approaches or separates. Pump device. A predetermined time is set in advance, and after the output of the signal from the driving state detecting means is stopped, a timer for measuring time until a predetermined time elapses;
When the discharge detection unit has not detected the discharge of the liquid from the discharge unit, and the output of the signal from the drive state detection unit has stopped, and the timer has finished counting time The pump device according to claim 2, further comprising stop means for stopping driving of the prime mover.   4. The pump device according to claim 3, wherein the timer is reset when the signal is output from the driving state detecting means before a predetermined time has elapsed after the start of timing. The activation means is a case where the timer has finished counting time and the output of the signal from the drive state detection means is stopped, and the discharge detection means releases the liquid from the discharge portion. The pump device according to claim 3 or 4, wherein the prime mover is activated when the engine is detected. The prime mover is an internal combustion engine;
An adjustment valve that is connected to the contacting / separating body and that adjusts the amount of fuel supplied to the internal combustion engine;
The pump device according to any one of claims 2 to 5, wherein the adjusting valve is operated by a contact / separation operation of the contact / separation body to adjust a fuel supply amount. The prime mover is an internal combustion engine;
A reciprocating part connected to the pump and reciprocating according to a discharge pressure of the pump;
An adjustment valve that is connected to the reciprocating portion and adjusts the amount of fuel supplied to the internal combustion engine;
The pump device according to any one of claims 2 to 5, wherein the adjustment valve is operated by a reciprocating operation of the reciprocating unit to adjust a supply amount of fuel.   The driving state detecting means includes a generator connected to the prime mover, and outputs an on signal when the generator is driven, and outputs an off signal when the generator is not driven. The pump device according to claim 1, wherein   The activation means activates the prime mover when an off signal is output from the drive state detection means and the discharge detection means detects the discharge of the liquid from the discharge portion. The pump device according to claim 8, wherein the pump device is configured as follows. A predetermined time is set in advance, and after detecting that the liquid is not discharged from the discharge portion by the discharge detection means, a timer for measuring time until a predetermined time elapses;
A stop means for stopping the driving of the prime mover when the release of the liquid from the discharge portion is not detected by the discharge detection means and the timer finishes counting the time. The pump device according to claim 9.   11. The pump device according to claim 10, wherein the timer is reset when a discharge of the liquid is detected by the discharge detection unit after a predetermined time has elapsed after the start of timing. . The prime mover is an internal combustion engine;
A reciprocating part connected to the pump and reciprocating according to a discharge pressure of the pump;
An adjustment valve that is connected to the reciprocating portion and adjusts the amount of fuel supplied to the internal combustion engine;
The pump device according to any one of claims 8 to 11, wherein the adjusting valve is operated by a reciprocating operation of the reciprocating unit to adjust a fuel supply amount.

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