JPH0735260A - Valve operation device - Google Patents

Abstract

PURPOSE:To prevent mistake of operation order, and eliminate troubles by quick load by operating each valve for which order from opening a jet valve till closing an unload valve is prescribed by a single operation, and closing an unload passage in the condition where liquid is capable of flowing out of an jet port. CONSTITUTION:In a high-pressure cleaning car, at the time of jetting pressure water from a large nozzle 24, a valve operation lever 60 is operated right for an operation angle theta, when changing of a pilot valve 22a of a second valve 22 is completed at an angle theta2 by a cam 32 to be at a communication changing position 22b, and the second valve 22 is opened. While the valve operation lever 60 is operated from an angle theta1 to the angle theta, a pilot valve 21a of a first valve 21 is changed to be at a disconnection changing position 21c, and the first changing valve 21 is opened. The pressure water from a pump P is thus supplied from the second changing valve 22 to the large nozzle 24. In the meanwhile, at the time of jetting the pressure water from a small nozzle 25, the valve operation lever 60 is operated left for the operation angle theta, and a third changing valve 23 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve provided in a supply passage for supplying a high-pressure fluid to be sprayed to a jet outlet, which valve must be operated in sequence, for example, to a water-jet nozzle in a high-pressure washing vehicle. The present invention relates to a valve operating device for a valve provided in a pressurized water supply passage.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Laid-Open No. 61-68191,
As seen in Japanese Utility Model Laid-Open No. 3-53972, there is a high-pressure washing vehicle that jets pressurized water pressurized by a water pump from a nozzle attached to the tip of a hose to wash a sewer pipe or the like. The pressurized water supply device provided in this type of high pressure cleaning vehicle connects the discharge side of the water pressure pump to the nozzle during cleaning,
When it is not washed, it is returned to the tank. For example, as shown in FIG. 8, a hydraulic circuit using manually operated ball valves 1, 2, 3 is provided, and the first nozzle 4
When ejecting from a small capacity first nozzle 4, the valve 2 of the first nozzle 4 is opened and then the valve 1 to the water tank 6 is closed, and when ejecting from a large capacity second nozzle 5, the valve 3 of the second nozzle 5 is opened. The valve 1 to the water tank 6 is closed after opening the water tank. When stopping the injection, open the valve 1 to the water tank 6 and then the first nozzle 4
The valve 2 (or the valve 3 of the second nozzle 5) is closed.

The opening and closing operations of the valves are performed in this order because when the passage on the discharge side of the water pump 7 is closed, the engine E is opened before the high pressure relief valve 8 is opened due to a sudden increase in load. This is because power is wasted even if the engine stops or the engine does not stop. In the figure, 9 is a first hose reel driven by a hydraulic motor, and 10 is a low pressure relief valve (first
Nozzle 4 is provided as a handheld small capacity washing gun), 11 is a second hose reel driven by a hydraulic motor, 12 and 13 are hydraulic oil from a hydraulic pump 14 to a hydraulic motor of the hose reel. Is a directional control valve for supplying the.

[0004]

In the above-mentioned pressurized water supply device used in the conventional high-pressure washing vehicle, three valves 1, 2 are used to control the water sprayed from the two nozzles 4, 5. It is necessary to selectively operate each of the three operation units, the operation is complicated, and the engine may stop if the operation sequence is wrong. At that time, there is a problem that it takes time to redo the operation from the engine start. Further, even if the number of the nozzles is one, two valves are required, and therefore the same problem occurs if the operation order of the valves is incorrect. It is an object of the present invention to provide a valve operating device in which the valve operating sequence is correct.

[0005]

In the valve operating device of the first invention, a discharge port of a pump for discharging a pressurized fluid is connected to an unload passage for unloading the discharge port side of the pump and a discharge port. Then, an operation valve having an unload valve for controlling the opening / closing of the unload passage and an ejection valve for controlling the opening / closing of the ejection port is provided, and a pressurized fluid is ejected from the ejection port to the operation valve. At this time, an operating unit is provided for switching control so that the ejection valve is opened and then the unload valve is closed by a single operation. In the valve operating device of the second invention, the discharge port of the pump that outputs the pressurized fluid is connected to the unload passage that unloads the discharge port side of the pump, and the ejection port of the large nozzle and the ejection port of the small nozzle. And an operation including a first valve for controlling the opening / closing of the unload passage, a second valve for controlling the opening / closing of the jet outlet of the large nozzle, and a third valve for controlling the opening / closing of the jet outlet of the small nozzle. A valve is provided, and the first valve is opened by opening the second valve or the third valve by a single operation when the pressurized fluid is injected from the ejection port of the large nozzle or the ejection port of the small nozzle to the operation valve. It is characterized in that an operating section for switching control so as to close is provided.

In the valve operating device of the first and second inventions, each valve of the operating valve is provided with an operating pilot valve, and the pilot valve is operated by operating the operating portion. It is preferable that the switching is performed by switching control. In the valve operating device of the first and second inventions, each valve of the operating valve is
It is preferable that the push rod can be used for switching.
In a valve operating device having a configuration provided with the pilot valve,
It is preferable that each of the pilot valves be configured to be switched by a push rod.

In the valve operating device having the push rod, the operating portion axially moves a spool type drive rod having a step portion in the axial direction to move each push rod by the step portion. It is preferably configured to drive.

In the valve operating device of the second invention, a pilot valve for operating each of the first valve, the second valve and the third valve is provided and the pilot valve is switched by each push rod. The push rod is formed so as to be driven by the step portion by axially moving a spool-type drive rod having an annular step portion on the outer periphery, and the push rod is operated by operating one of the drive rods. The first valve and the second valve are operated to eject the fluid from the large nozzle, and the first valve and the third valve are operated to eject the fluid from the small nozzle by operating the other of the drive rods. It should be done.

In the valve operating device having the push rod, the operating portion is provided so as to drive each of the push rods on the operating lever, the operating rod interlocked with the operating lever, and the operating rod. And a cam that is attached to the cam. In the valve operating device having the push rod, a first push rod and a jet port side of the push rod corresponding to a valve that closes an unload side that is operated when jetting a fluid from the jet port are provided. Second in the push rod corresponding to the valve to open
A member for simultaneously driving the push rods is provided, and the substantial switching stroke of the valve switched by the first push rod is made longer than the substantial switching stroke of the valve switched by the second push rod. Is good.

In the valve operating device having the pilot valve, it is assumed that the pilot valve is a solenoid valve and the operating portion is a control panel that outputs an electric command to control the switching of the solenoid valve. Is good. In the first and second aspects, each valve of the operation valve is a solenoid valve,
It is preferable that the operation unit is a control panel that outputs an electric command to switch and control the solenoid valve.

[0011]

According to the first aspect of the present invention, the operations of the respective valves, in which the ejection valve is opened and then the unload valve is closed, are performed in a predetermined order by a single operation. As a result, the unload passage is closed in a state where the fluid can flow out from the ejection port, so that a sudden load such as closing the discharge side of the pump is prevented. The second invention is the second
The operation of the two valves, which are in the order of opening the valve or the third valve and then closing the first valve, is performed in a predetermined order by a single operation. As a result, the unloading passage is closed in a state where the fluid can flow out from the large nozzle or the small nozzle, so that a sudden load such as closing the discharge side of the pump is prevented. With the configuration provided with the pilot valve, even if the discharge valve, the unload valve, or the first valve, the second valve, and the third valve are of high pressure and large capacity, the operation portion can be operated with a small force. It is possible. Therefore, it is most suitable for a valve operating device of a high pressure washing car.

In the structure in which the valve is switched by the push rod, the valve is switched by a simple operation, so that the operation part can be simply structured. The configuration using the spool-type drive rod can be combined with the push rod to reliably perform the operation sequence of the plurality of valves. With the configuration in which the drive rod is operated to one side and the other side, it is possible to perform two types of single operations for operating two valves with one operation lever. Since the operation of selecting large and small nozzles and injecting and stopping the pressurized water is performed by one valve operation lever, the number of operation parts in valve operation is reduced.

The configuration using the cam mechanism, in combination with the push rod, makes it possible to reliably perform the operation sequence of the plurality of valves. The configuration in which the push rods of the two valves that need to be operated in order are switched and the order is determined by making a difference in the substantial switching strokes requires that the push rods be driven simultaneously. It can be simplified. In the configuration using the solenoid valve, the operation of the two valves that need to be operated in sequence can be sequentially switched by an electric command from the control panel, and the pressure of the controlled fluid and the pressure of the controlled fluid can be changed by setting the electric circuit of the control panel. Appropriate switching timing can be obtained according to the capacity, and it can be operated at a position away from the valve.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The device of this embodiment is a device for operating a plurality of valves for selecting either large or small nozzles of a high-pressure washing vehicle and injecting pressurized water. These plural valves are a first valve 21 which is an unload valve, a second valve 22 which is a valve for the large nozzle 24,
There are three third valves 23, which are valves for the small nozzles 25, and each valve 21, 22, 23 is equipped with pilot valves 21a, 22a, 23a, respectively, as shown in the figure. The valve operating device is
The operation rod 30, the first cam 31, the second cam 32, and the like.

First, a plurality of valves and their circuits will be described. Since the first, second, and third valves 21, 22, and 23 have the same structure, the structure of the first valve 21 will be described, and the other second and third valves 22 and 23 are equivalent to the first valve. Portions are denoted by the same reference numerals and the description thereof will be omitted. The large diameter portion 44 of the poppet valve 43 is slidably fitted into the inner hole 42 of the main body 41 of the first valve 21. The poppet valve 43 has a large diameter portion 44 on the upper side and a small diameter portion 45 on the lower side.
The lower end 46 of the valve 5 abuts on the valve seat 47 so that the inlet 48 and the outlet 49
Close between and. A spring chamber 50 is formed by the inner hole 42 and the upper surface of the large diameter portion 44, and the poppet valve 43 is formed in the spring chamber 50.
A spring 51 for pressing down is accommodated. An annular pressure chamber 52 is formed below the large diameter portion 48 of the poppet valve 43 by the inner hole 42 and the small diameter portion 45. The pressure chamber 52 and the spring chamber 50 are communicated with each other by a throttle passage 53.

An outlet 49 of the first valve 21 is connected to the tank T, an outlet 48 of the hydraulic pump P is connected to an inlet 48 communicating with the pressure chamber 52, and the spring chamber 50 and the tank T are connected to the pilot valve 21a. It is connected through. Pilot valve 21
a has a communication position 21b and a blocking position 21c,
The push rod 21e is held at the communication position 21b by 1d and is pressed against the spring 21d against the spring 21d.
Switch to c. Pilot valve 21a is in communication position 21b
When the discharge water of the water pressure pump P is supplied to the pressure chamber 52, the pressure water flows through the throttle passage 53 into the spring chamber 5
0, flow out to the tank T through the pilot valve 21a.
For this reason, the water pressure in the spring chamber 50 becomes lower than that in the pressure chamber 52, so that the poppet valve 43 is raised against the spring 51 to open the valve, the pressure chamber 52 and the outlet 49 communicate with each other, and the pressure water is stored in the tank. It is released to T. This is an unloading state described later, and the spring force of the spring 51 is determined so that the pressure of the pressure chamber 52 at the time of this unloading becomes close to the tank pressure.

The pilot valve 21a is a push rod 21.
When e is pushed to switch to the blocking position 21c, the spring chamber 5
Since the discharge of the pressurized water from 0 to the tank T is cut off, the pressure in the spring chamber 50 and the pressure in the pressure chamber 52 become the same, and the poppet valve 43 moves downward by the spring 51 and between the inlet 48 and the outlet 49. Is cut off. That is, the discharge water of the pump P is blocked by the first valve 21 and does not flow out to the tank T.

The second valve 22 has an inlet 48 connected to the discharge side of the pump P, an outlet 49 connected to the large nozzle 24, and a spring chamber 50 between the outlet 49 and the large nozzle 24 via the pilot valve 22a. It is connected to the. The third valve 23 has an inlet 48 connected to the discharge side of the pump P, an outlet 49 connected to the small nozzle 25, and a spring chamber 50 connected between the outlet 49 and the small nozzle 25 via the pilot valve 23a. ing. Similarly, for the second valve 22 and the third valve 23, when the pilot valves 22a and 23a are in the shutoff position, the inlet 48 and the outlet 49 are shut off, and the pilot valves 22a and 23a are shut off.
When a is in the communication position, communication is established between the inlet 48 and the outlet 49. When communication is established between the inlet 48 and the outlet 49,
The pressurized water is supplied to the large nozzle 24 and the small nozzle 25. The pilot valves 22a and 23a similarly have communication positions 21b and 22b and cutoff positions 22c and 23c, respectively, and are cut off by the springs 22d and 23d.
23c, the push rods 22e, 23e are pressed against the springs 22d, 23d, so that the communication position 22b,
23b.

Next, the above-mentioned first, second and third valves 21,
The valve operating devices 22 and 23 will be described. Operating stick 30
Is a bearing that rotates at a fixed position and is coupled with a valve operating lever 60, and by operating the valve operating lever 60, the valve operating lever 60 is rotated by a predetermined operating angle θ from the neutral position to the small nozzle operation. A locking device 61 is provided so as to be locked at the position or the large nozzle operating position. The locking device 61 is composed of a turntable 62 fixed to the operating rod 30 and a ball plunger 63 that engages with a notch provided on the outer periphery thereof. The first cam 31 is a rotating cam, and the operating rod 3
The pilot valve 21a of the first valve 21 is fixed to 0.
The push rod 21e is provided so as to be driven by the cam surface. The push rod 21e is not driven within a range of a left / right operation angle θ1 smaller than the left / right operation angle θ of the valve operating lever 60, and when the operation angle θ1 is exceeded, the push rod 21e is reached before the operation angle θ is reached.
Is driven to switch the pilot valve 21a.

The second cam 32 is fixed to the operating rod 30 and is a rotating cam, but has a balance-like shape, and one end of the second cam 32 is the second.
The push rod 22e of the valve 22 is provided so as to be driven by the cam surface 32a, and the other end is provided with the third valve 23.
Corresponding to the push rod 23e of the cam surface 32b
It is provided to be driven by. And the valve operating lever 60
Depending on the direction of operation, when the valve operating lever 60 is operated to the right, the push rod 22e of the second valve 22 is driven to switch the pilot valve 22a, and when operated to the left, the third valve 2 is operated.
3 push rod 23e to drive pilot valve 23
a is switched, and the push rod 22 is operated within a range of a left / right operation angle θ2 smaller than the left / right operation angle θ1.
drive e, 23e, that is, pilot valves 22a, 23e
The switching of a is completed. The second cam 3
The number 2 may be divided into two, one having the cam surface 32a and the other having the cam surface 32b, and may be provided at different positions of the operating rod 30.

The valve operating device constructed as described above, when the pressurized water is injected from the large nozzle 24, the valve operating lever 6
0 is operated to the right by the operation angle θ. When the valve operating lever 60 is operated by the angle θ2, the pilot valve 2 of the second valve 22
The switching of 2a is completed and the communication switching position 22b is reached.
The valve 22 is opened, and then the pilot valve 21 of the first valve 21 is operated while the valve operating lever 60 is operated from the angle θ1 to the angle θ.
The switching of a is performed and the cut-off switching position 21c is reached, and the first switching valve 21 is closed. The third switching valve 23 remains closed. Therefore, since the first switching valve 21 opens after the second switching valve 22 opens, the pressurized water from the pump P comes to be supplied from the second switching valve 22 to the large nozzle 24. Since the discharge side of the pump P is not closed in the meantime, the engine does not stop.

When the pressurized water is jetted from the small nozzle 25, the valve operating lever 60 is operated to the left by an operating angle θ. When the valve operating lever 60 is operated by the angle θ2, the third
The switching of the pilot valve 23a of the valve 23 is completed, the communication switching position 23b is reached, the third valve 23 is opened, and then the valve operating lever 60 is operated from the angle θ1 to the angle θ. The pilot valve 21a is switched to the cutoff switching position 21c, and the first switching valve 21 is closed. The second switching valve 23 remains closed. Therefore, since the first switching valve 21 is opened after the third switching valve 23 is opened, the pressurized water from the pump P is supplied from the third switching valve 23 to the small nozzle 25. Since the discharge side of the pump P is not closed in the meantime, the engine does not stop. Further, when the injection of the large and small nozzles is stopped, the discharge side of the pump P is connected to the tank and the supply of the pressurized water to the nozzle is stopped in the opposite manner to the above. Absent.
In addition, since the injection and stop of the pressurized water from the large and small nozzles are performed by a single operating lever, there is no fear of erroneous operation and the operability is very good.

A second embodiment will be described with reference to FIG. The device of this embodiment is an operating device for three valves, that is, a first valve 21, a second valve 22 and a third valve 23, which are the same as those in the first embodiment, and each push valve of the pilot valves 21a, 22a, 23a. It is provided for the rods 21e, 22e, and 23e. This valve operating device includes a valve operating lever 70, a first member 71, a second member 72 and the like. The pilot valve of the first embodiment has a slightly different structure. In the figure, the same parts as in the first embodiment are designated by the same reference numerals.

The valve operating lever 70 is rotatable about the support shaft 74 from the neutral position to the left and right by an angle of θ, extends to a position equidistant from the support shaft 74, and has its leading end formed in the driving portion. The arms 75 and 76 are formed.
Although not shown, the support shaft 74 is provided with the same locking device 61 as in the first embodiment. First member 71
Is driven downward by the arm 75 in the predetermined stroke diagram, and its lowering simultaneously drives both push rods 21e, 22e of the pilot valves of the first valve 21 and the second valve 22 for the predetermined stroke. It is provided to do so. The first member 71 is fixed to the push rod 22e of the pilot valve 22a of the second valve 22. The second member 72 is adapted to be driven downward in the predetermined stroke diagram by the arm 76, and by its lowering, both push rods 21e and 23e of the pilot valves of the first valve 21 and the third valve 23 are driven. At the same time, it is provided to drive a predetermined stroke. Second member 72
Is the push rod 2 of the pilot valve 23a of the third valve 23
It is fixed to 3e so as not to interfere with the first member 71.

The pilot valves 21a, 22a and 23a are
The respective spools 21f, 22f, 23f are pressed downward by the push rods 21e, 22e, 23e so that they can be switched against the respective springs 77.
The switching is performed by switching the pilot valve 21a of the first valve from the communication state to the cutoff state, and the pilot valves 22a of the second and third valves,
23a changes from the cutoff state to the communication state. This point is the same as the first embodiment, except that the spool 21a of the first valve is
And the spools 22a and 23a of the second and third valves have different switching timings. That is, the switching stroke until the pilot valve substantially completes switching while the push rod is driven by a predetermined stroke is long for the spool 21a of the first valve and short for the pilot valves 22a and 23a. When the valves 21a and 22a or 21a and 23a are switched and driven at the same time, the pilot valve 22a or 23a is always switched to the communicating state first, and then the pilot valve 21a is switched to the closed state.

In the valve operating device thus constructed, when the operation lever 70 is operated by an angle θ from the neutral position to the right, the arm 7 is moved.
5 simultaneously drives both push rods 21e and 22e of the pilot valve via the first member 71. As a result, the pilot valve 22a is first switched to the open state, and then the pilot valve 21a is switched to the closed state. Therefore,
The second valve 22 first opens to connect the discharge side of the pump P to the large nozzle, and then the first valve 21, which is an unload valve, closes to stop discharge to the tank. Further, when the operation lever 70 is operated from the neutral position to the left by the angle θ, the arm 7 is moved.
6 simultaneously drives both push rods 21e and 23e of the pilot valve via the second member 72. As a result, the pilot valve 23a is first switched to the open state, and then the pilot valve 21a is switched to the closed state. Therefore,
The third valve 23 is first opened to connect the discharge side of the pump P to the small nozzle, and then the first valve 21 which is an unload valve is closed to stop the discharge to the tank. Therefore, when water is jetted from the large nozzle or the small nozzle, the pump P
The discharge side is not accidentally closed, and the valves are reliably opened and closed in a predetermined order, so that the engine E driving the pump is not stopped. Further, when the injection of the large and small nozzles is stopped, the discharge side of the pump P is connected to the tank and the supply of the pressurized water to the nozzle is stopped in the opposite manner to the above. Absent. In addition, the injection of pressurized water from the large and small nozzles and stopping are done with a single operating lever, so there is no risk of erroneous operation,
Operability is very good.

In the second embodiment, the first member 71, the second member
Although the member 72 is fixed to the push rod of the pilot valve, a guide for guiding the member 72 so as to move it in a predetermined stroke range along the moving direction of the push rod may be provided separately. Further, in that configuration, the operation lever 70 may be omitted in some cases, and the first member 71 and the second member 72 may be provided with separate operation levers for large nozzle operation and small nozzle operation, respectively.

A third embodiment of the present invention will be described with reference to FIGS. The device of this embodiment is also a device for operating a plurality of valves for selecting either large or small nozzles of a high-pressure washing vehicle to inject pressurized water, and the valve and its circuit are substantially the same as those shown in the first embodiment. They are the same, and the same parts are designated by the same reference numerals. That is, these multiple valves are shown in FIG.
In the circuit shown in Fig. 3, the first valve 21 is an unload valve, the second valve 22 is a valve for the large nozzle 24, and the third valve 23 is a valve for the small nozzle 25. Yes, each valve 21, 22, 23 is a pilot valve 2 as shown in the figure.
1a, 22a, 23a are provided. The valve operating device includes a drive rod 130, an operating lever 131, and a detent device 132.
Etc.

First, a plurality of valves and their circuits will be described. Since the first, second and third valves 21, 22, 23 have the same structure, the structure of the third valve 23 will be described with reference to FIG.
Regarding the other first and second valves 21 and 22, the same parts as those of the third valve are designated by the same reference numerals and the description thereof will be omitted. Third valve 23
The large diameter portion 4 of the poppet valve 43 in the inner hole 42 of the main body 41.
4 is slidably inserted. The upper side of the poppet valve 43 is formed into the large diameter portion 44 and the lower side is formed into the small diameter portion 45, and the lower end 46 of the small diameter portion 45 abuts the valve seat 47 and closes between the inlet 48 and the outlet 49. A spring chamber 50 is formed by the inner hole 42 and the upper surface of the large diameter portion 44, and a spring 51 that presses the poppet valve 43 downward is accommodated in the spring chamber 50. Below the large diameter portion 48 of the poppet valve 43, the inner hole 42 and the small diameter portion 4 are provided.
5 and 5 form an annular pressure chamber 52. The pressure chamber 52 and the spring chamber 50 are communicated with each other by a throttle passage 53.

The first valve 21 has an outlet 49 as shown in FIG.
Is connected to the tank T, the discharge side of the hydraulic pump P is connected to the inlet 48 leading to the pressure chamber 52, and the spring chamber 50 and the tank T are connected via the pilot valve 21a.
The pilot valve 21a has a communication position 21b and a cutoff position 21c in the circuit diagram, and is closed by a spring 21d.
When the push rod 21e is held against the spring 21d while being held at 1c, it is switched to the communication position 21b. When the pilot valve 21a is pushed to the communication position 21b by pushing the push rod 21e, the water discharged from the hydraulic pump P is discharged from the pressure chamber 5
When supplied to the tank 2, the pressurized water flows out to the tank T through the throttle passage 53, the spring chamber 50 and the pilot valve 21a. Therefore, the water pressure in the spring chamber 50 becomes lower than that in the pressure chamber 52, so that the poppet valve 43 is lifted against the spring 51 to open the valve, and the pressure chamber 52 and the outlet 49 communicate with each other.
The pressurized water is discharged to the tank T. This is an unloading state, and the spring force of the spring 51 is determined so that the pressure of the pressure chamber 52 during this unloading becomes close to the tank pressure.

The pilot valve 21a is the push rod 21.
When the pressure of e is released and switched to the blocking position 21c,
Since the discharge of the pressurized water from the spring chamber 50 to the tank T is blocked, the pressure in the spring chamber 50 and the pressure in the pressure chamber 52 become the same, and the poppet valve 43 moves downward by the spring 51 to move the inlet 48 and the outlet 49. Is cut off. That is, the discharge water of the pump P is blocked by the first valve 21 and does not flow out to the tank T.

The second valve 22 has an inlet 48 connected to the discharge side of the pump P, an outlet 49 connected to the large nozzle 24, and a spring chamber 50 between the outlet 49 and the large nozzle 24 via the pilot valve 22a. It is connected to the. The third valve 23 has an inlet 48 connected to the discharge side of the pump P, an outlet 49 connected to the small nozzle 25, and a spring chamber 50 connected between the outlet 49 and the small nozzle 25 via the pilot valve 23a. ing. Similarly, for the second valve 22 and the third valve 23, when the pilot valves 22a and 23a are in the shutoff position, the inlet 48 and the outlet 49 are shut off, and the pilot valves 22a and 23a are shut off.
When a is in the communication position, communication is established between the inlet 48 and the outlet 49. When communication is established between the inlet 48 and the outlet 49,
The pressurized water is supplied to the large nozzle 24 and the small nozzle 25.

The pilot valves 22a and 23a are similarly connected to the communicating positions 21b and 22b and the shut-off positions 22c and 23.
c and has a blocking position 22 by springs 22d and 23d.
c, 23c, push rods 22e, 23e
Is pressed against the springs 22d and 23d, the communication position 22
b, 23b. Pilot valves 21a, 22
As shown in the upper part of FIG. 4, the specific structure of a and 23a is such that the ball 23f pressed by the spring 23d opens and closes the valve hole as shown in the upper part of FIG.
When 3e is driven, the ball 23f is pushed and moved,
It is designed to open.

Next, the above-mentioned first, second and third valves 21,
The valve operating devices 22 and 23 will be described. Drive rod 13
As shown in FIG. 3, 0 is inserted into a through hole 24 formed in a block-shaped main body 41a provided with pilot valves 21a, 22a and 23a so as to move forward and backward along the axis. The driven holes of the push rods 21e, 22e, and 23e of the pilot valves project into the through holes 24. The drive rod 130 is provided with annular grooves 133, 134, 135, 136 on its outer peripheral surface to form a stepped portion, and the forward and backward movement of the drive rod 130 causes the driven end side of each push rod to project at the position of the annular groove. , At the position of the outer peripheral surface, it is retracted by the step. The side surface of each annular groove is formed as an inclined surface, and the driven end of each push rod smoothly moves in and out along the corresponding inclined surface as the drive rod 130 moves back and forth.

The operation lever 131 has a grip portion 131 at one end.
a and the other end is supported by a fulcrum metal fitting 160 attached to the main body 41a by a shaft 161 and is axially coupled to one end of the drive rod 130 through a long hole (not shown). By rotating the operating lever 131 in the direction of the arrow from the neutral position (unloading position) shown by the solid line in FIG. 1, the drive rod 130 is moved forward and backward. A detent device 132 is provided to regulate the advance / retreat position.

The detent device 132 is provided at the end of the drive rod 130 opposite to the side on which the operating lever 131 is provided, and as shown in FIG. 3, three detent devices are formed on the drive rod 130. Grooves 162, 163, 164, a ball 65 engaging with the groove, a ball holding portion 66 holding the ball 65 at a fixed position in the axial direction of the drive rod 130,
The ball 65 is composed of a cylindrical member 67 that comes into contact with the bottom surface of the annular groove so as to elastically press the end surface, and a spring 68 that presses the cylindrical member 67. The illustrated state is a neutral position in which the ball 65 is engaged with the annular groove 163. When the operating lever 131 is operated to move the drive rod 130 from the neutral position to the left in the drawing, the annular groove 164 comes into engagement with the ball 65 and is held at that position, which is the large nozzle operating position. When the operation lever 131 is operated to move the drive rod 130 from the neutral position to the right in the figure, the annular groove 16
2 comes into engagement with the ball 65 and is held in that position, which is the small nozzle operating position.

In the neutral position, the drive rod 130 is
The outer peripheral surface corresponds to the driven part of the push rod 21e, the annular groove 135 corresponds to the driven part of the push rod 22e, and the annular groove 136 corresponds to the driven part of the push rod 23e. Therefore, the push rod 21e retracts, the push rod 22e projects, and the push rod 2e
3e is protruding. In the large nozzle operating position,
In the drive rod 130, the driven groove of the push rod 21e corresponds to the annular groove 134, the driven portion of the push rod 22e corresponds to the outer peripheral surface, and the driven portion of the push rod 23e corresponds to the annular groove 136. . Therefore, the push rod 21e projects, the push rod 22e retracts, and the push rod 23e projects. In the small nozzle operating position, the drive rod 130 has the annular groove 133 corresponding to the driven portion of the push rod 21e and the push rod 22e.
The annular groove 135 corresponds to the driven portion of e, and the outer peripheral surface corresponds to the driven portion of the push rod 23e. Therefore, the push rod 21e projects, the push rod 22e projects, and the push rod 23e retracts.

As described above, the push rods 21e, 22e and 23e which are operated by advancing and retracting the drive rod 130 are projected and retracted at the timings of the annular grooves 133, 134 and 13.
5, 136 depending on the position of the stepped portion formed. The position of each step is determined so that when the unloading neutral position is operated to the large nozzle operating position, the push rod 22e is first retracted and then the push rod 21e projects. When the load is operated from the neutral position to the small nozzle operating position, the push rod 23e is first retracted and then the push rod 21e is projected. In this configuration, when the large nozzle operating position is operated to the neutral position, the push rod 21e is first retracted and then the push rod 22e projects, and when the small nozzle operating position is operated to the neutral position, the push rod 21e is first pushed. Is retracted, and then the push rod 23e projects.

The valve operating device having the above-described structure is shown in FIG. 3 or 5 when the pressurized water is jetted from the large nozzle 24.
In, the valve operating lever 131 is operated to the left to move the drive rod 130 until the ball 65 of the detent device 132 engages with the annular groove 164. Valve operating lever 131
Is the pilot valve 22 of the second valve 22 during the operation of the entire operation amount.
The switching of the pilot valve 21a of the first valve 21 is switched while the switching of the valve a is completed and the communication switching position 22b is reached, the second valve 22 is opened, and then the valve operating lever 131 is operated by the remaining remaining operation amount. Is performed, the cut-off switching position 21c is reached, and the first switching valve 21 is closed. The third switching valve 23 remains closed. Therefore, after the second switching valve 22 is opened,
Since the switching valve 21 is closed, the pressurized water from the pump P is supplied from the second switching valve 22 to the large nozzle 24, and the discharge side of the pump P is not closed during this operation. Therefore, the engine does not stop.

When jetting pressure water from the small nozzle 25, the valve operating lever 131 is operated to the right to move the drive rod 130 until the ball 65 of the detent device 132 engages with the annular groove 162. When the valve operating lever 131 is in the middle of operating the entire operation amount, the pilot valve 23a of the third valve 23
Is completed and the communication switching position 23b is reached, and the third valve 2
3 is opened and then the valve operating lever 131 is operated to operate the remaining total operation amount, the pilot valve 21a of the first valve 21 is switched to the cutoff switching position 21c, and the first switching valve 2
1 is closed. The second switching valve 22 remains closed. Therefore, since the first switching valve 21 opens after the third switching valve 23 opens, the pressurized water from the pump P is the third
It is supplied from the switching valve 23 to the small nozzle 25,
Since the discharge side of the pump P is not closed during this operation, the engine is not stopped.
Also, when the injection of the large and small nozzles 24, 25 is stopped, the discharge side of the pump P is connected to the tank and the supply of the pressurized water to the nozzles is stopped in reverse to the above, so that the engine E is also stopped. There is no such thing. In addition, since the injection and stop of the pressurized water from the large and small nozzles are performed by a single operating lever, there is no fear of erroneous operation and the operability is very good. In addition,
The spool shown in FIGS. 3 to 5 can be driven not only manually but also by an electric motor or fluid pressure.

A fourth embodiment of the present invention will be described with reference to FIG. This embodiment is different from the third embodiment in that the pilot valves 21a, 22a and 23a are electromagnetic valves and the control panel 8 for giving electric commands to the solenoids 91, 92 and 93 thereof.
1 is provided as an operation unit. In the figure, 82 is a small nozzle injection push button switch, 83 is a large nozzle injection push button switch, 84 is a push button switch for returning to a neutral state,
Reference numeral 85 is a power on / off push button switch, and 86 is an adjusting knob provided with a switching interval setting knob and a switching operation time setting knob. Since the other points are the same, description thereof will be omitted. A control circuit is incorporated in the control panel 81, and when the push button switches 82, 83, 84 are pushed, electric command signals are respectively given as follows. That is, when the push button switch 82 is pressed while the power is on, an electric command is given to the solenoid 92 of the pilot valve 22a, and a predetermined time delay elapses thereafter from the pilot valve 21.
An electric command is given to the solenoid 91 of a. As a result, similarly to the fourth embodiment, the first switching valve 21 is closed after the second switching valve 22 is opened, so that the pressurized water from the pump P is supplied from the second switching valve 22 to the large nozzle 24. Since the discharge side of the pump P is not closed during this operation, the engine is not stopped. In this large nozzle jetting state, the push button switch 84
When is pressed, the electric command for the solenoid 91 disappears, and after a predetermined time, the electric command for the solenoid 92 disappears. As a result, the second switching valve 22 is opened after the first switching valve 21 is opened.
Is closed, the discharge side of the pump P is not closed during this period, and therefore the engine is not stopped.

When the push button switch 83 is pushed, an electric command is given to the solenoid 93 of the pilot valve 23a,
After that, an electric command is given to the solenoid 91 of the pilot valve 21a after a predetermined time delay. As a result, similarly, since the third switching valve 23 is opened and then the first switching valve 21 is closed, the pressurized water from the pump P is supplied from the third switching valve 23 to the small nozzle 25. Since the discharge side of the pump P is not closed during the period, the engine does not stop. When the push button switch 84 is pressed in this small nozzle injection state, the electric command of the solenoid 91 disappears, and the electric command of the solenoid 93 disappears after a predetermined time. As a result, the first switching valve 21 is opened and then the third switching valve 23 is closed. Therefore, the discharge side of the pump P is not closed during this period and the engine is not stopped in the same manner. .

The adjusting knob 86 is provided as a two-stage knob, and the switching interval of each valve can be changed by turning the outer knob, and the switching operation time of each valve can be turned by turning the inner knob. Is variable. The higher the pressure of the controlled fluid and the larger the volume, the longer the switching time of each valve. In that case, the outer knob is used to set a long switching interval to ensure a reliable operation. In addition, in order to reduce the impact at the time of switching, the switching operation time of each valve is set by the inner knob to ensure smooth switching. This adjustment knob 86 improves the durability of the valve operating device,
Even if the pressure / volume of the controlled fluid changes, at least the same control panel 81 can be used.

A schematic configuration of the fifth embodiment of the present invention is shown in FIG. In this embodiment, the pilot valve 2 in the fourth embodiment is used.
1a, 22a, and 23a correspond to the first switching valve 2
In the example used as the first, second switching valve 22 and the third switching valve 23, that is, the configuration without the pilot valve. Only the connection state is shown in the figure. Although illustration of the control panel is omitted, it is the same as that of FIG. 6, and when injecting from the large nozzle 24, the first switching valve 2 is opened after the second switching valve 22 is opened.
When 1 is closed and the small nozzle 25 is used for injection, the third switching valve 23 is opened and then the first switching valve 21 is closed. Also when the injection is stopped, the first switching valve 21 is opened and then the second switching valve 22 or the third switching valve 23 is closed. Therefore, the engine will not stop as well.

In the fifth embodiment, the main valve does not have a pilot valve, but in the first to third embodiments, the valve operating device does not have a pilot valve as shown in the fifth embodiment. It can be applied to the one using a valve.

[0046]

According to the first invention described in claim 1,
The operation of the two valves that opens the ejection valve and then closes the unload valve is performed by a single operation, and according to the second invention of claim 2, the second valve or the third valve. Since the operation of the two valves that open the valve and then close the first valve is performed by a single operation, there is no mistake in the order of valve operation. For this reason, the pump discharge port side is not closed and a sudden load is not generated, so that the trouble due to the abrupt load is prevented. For example, when the present invention is applied to a valve operating device of a pressurized water supply device for a high-pressure washing vehicle, engine stop is prevented. According to the invention of claim 3, the unload valve, the ejection valve,
Alternatively, the first valve, the second valve, and the third valve can be operated with a small force, and the operability of the valve operating device of the high-pressure washing vehicle is improved. According to the invention described in claims 4 and 5, the cost can be reduced by the simple configuration of the operation portion. According to the invention described in claims 6 and 7, the valve switching timing can be changed only by changing the shape of the annular step portion of the spool type drive rod. According to the invention described in claim 7, switching between large nozzle injection, small nozzle injection, and injection stop can be performed by, for example, one operation lever, which makes it extremely easy for the operator to operate. According to the invention described in claims 8 and 9, the durability is improved. Claims 10 and 1
According to the invention described in 1, the control panel can be provided at a position apart from the unload valve, the ejection valve, or the first valve, the second valve, and the third valve, so that the control panel can be freely installed. The degree increases.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a vertical sectional side view of a third embodiment of the present invention.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a schematic configuration diagram showing the whole of the embodiment.

FIG. 6 is a schematic configuration diagram of a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram showing an example of a pressurized water supply device for a conventional high-pressure washing vehicle.

[Explanation of symbols]

 21 1st valve 21a Pilot valve 21e Push rod 22 2nd valve 22a Pilot valve 22e Push rod 23 3rd valve 23a Pilot valve 23e Push rod 23f Ball 24 Large nozzle 25 Small nozzle 30 Operating rod 31 1st cam 32 2nd cam 60 Valve operation lever 70 Valve operation lever 71 First member 72 Second member 81 Operation panel 82 Small nozzle injection push button switch 83 Large nozzle injection push button switch 91 Solenoid 92 Solenoid 93 Solenoid 130 Drive rod 131 Operation lever 132 Detent device 133 Annular groove 134 annular groove 135 annular groove 136 annular groove

Claims (11)

[Claims] 1. A discharge port of a pump for discharging a pressurized fluid,
An operation valve that connects an unload passage for unloading the discharge side of the pump and a jet outlet, and has an unload valve for controlling the opening and closing of the unload passage, and a jet valve for controlling the opening and closing of the jet outlet. And the operation valve is provided with an operation unit for performing switching control so as to open the ejection valve and then close the unload valve by a single operation when the pressurized fluid is ejected from the ejection port. A valve operating device characterized by. 2. A discharge port of a pump for outputting a pressurized fluid,
Connect the unload passage that unloads the discharge side of this pump to the jet outlet of the large nozzle and the jet outlet of the small nozzle,
An operation valve having a first valve for controlling the opening / closing of the unload passage, a second valve for controlling the opening / closing of the jet outlet of the large nozzle, and a third valve for controlling the opening / closing of the jet outlet of the small nozzle. Provided to this operation valve, when the pressurized fluid is injected from the ejection port of the large nozzle or the ejection port of the small nozzle, the second valve or the third valve is opened by a single operation, and then the first valve is closed. A valve operating device characterized in that an operating section for switching control is provided. 3. The valve operating device according to claim 1, wherein each valve of the operating valve is provided with an operating pilot valve, and the operating portion is operated. A valve operating device having a configuration in which the pilot valve is switched by switching control. 4. The valve operating device according to claim 1 or 2, wherein each valve of the operating valve is configured to be switched by a push rod. 5. The valve operating device according to claim 3,
A valve operating device, wherein each of the pilot valves is configured to be switched by a push rod. 6. The valve operating device according to claim 4 or 5, wherein the operating portion axially moves a spool-type drive rod having a step portion in the axial direction to move each of the push rods. A valve operating device configured to be driven by the step portion. 7. The valve operating device according to claim 2,
A spool valve having pilot valves for operating the first valve, the second valve, and the third valve is provided so that the pilot valves are switched by respective push rods, and an annular step portion is provided on the outer circumference. The push rod is formed so as to be driven by the step portion by moving the drive rod in the axial direction, and the first valve is configured to inject fluid from the large nozzle by operating one of the drive rods. And the second valve is operated, and the first valve and the third valve are operated so as to eject the fluid from the small nozzle by operating the other of the drive rods. 8. The valve operating device according to claim 4 or 5, wherein the operating portion drives an operating lever, an operating rod interlocking with the operating lever, and each of the push rods on the operating rod. And a cam provided so as to operate the valve operating device. 9. The valve operating device according to claim 4 or 5, wherein the first one of the push rods corresponding to a valve that closes an unload side that is operated when ejecting a fluid from the ejection port. A member that simultaneously drives the push rod and the second push rod in the push rod corresponding to the valve that opens the ejection port side is provided, and the substantial switching stroke of the valve that is switched by the first push rod is A valve operating device characterized in that it is longer than a substantial switching stroke of a valve that is switched by two push rods. 10. The valve operating device according to claim 3, wherein the pilot valve is a solenoid valve, and the operation section is a control panel that outputs an electric command to control switching of the solenoid valve. Valve operating device. 11. The valve operating device according to claim 1, wherein each valve of the operating valve is a solenoid valve, and the operating section outputs an electric command to switch the solenoid valve. A valve operating device, which is a control panel that operates.