JP2006026615A - Gas-liquid mixed stream jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-liquid mixed stream jetting apparatus in which a gas and a liquid are mixed in an optimum condition corresponding to an intended purpose when the gas and the liquid are mixed and jetted. <P>SOLUTION: The gas-liquid mixed stream jetting apparatus for forcibly feeding a plurality of the liquids different in the kind and small in quantity by a pump 16, mixing with a large quantity of compressed air and jetting the mixture from a nozzle 20 is provided with a flow control valve 19 for controlling the flow rate of the liquid in the vicinity of the nozzle 20 and an air duct 24 for carrying a large quantity of the compressed air between the nozzle 20 and the flow control valve 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas-liquid mixed flow injection apparatus of a type in which two or more kinds of small flow liquids such as water and chemicals are pumped by a pump, mixed with high flow compressed air, and injected by a nozzle.

Conventionally, a gas-liquid mixed flow injection device that switches between two or more different low-flow liquids such as water and chemicals, pumps them with a pump, mixes them with high-flow compressed air and injects them with a nozzle is disclosed in the following patent document 1.
JP 2000-093904 A

  However, in the apparatus of Patent Document 1, the flow rate of each liquid is adjusted on the upstream side of the pump, that is, the flow rate adjusting valve for each liquid provided in the apparatus main body. Each time the liquid was replaced, each liquid was sequentially ejected from the nozzle, and the flow rate was adjusted by each flow rate adjustment valve in the main body to obtain an optimum flow rate, which was cumbersome and time consuming.

  Moreover, in the apparatus of Patent Document 1, since the mixing part of compressed air and liquid is provided on the near side of the nozzle, all of the liquid ejected from the nozzle is ejected in a pulsating state. It is unsuitable for liquids that are to be sprayed in the form of mist, such as chemicals and fungicides.

  Furthermore, in the case of spraying foaming detergent with the apparatus of Patent Document 1, since the mixing portion of compressed air and liquid is also provided on the front side of the nozzle, the pipe before the detergent once foamed is sprayed from the nozzle. It was crushed by the road resistance, and the foaming detergent sufficiently foamed could not be sprayed from the nozzle.

  In order to solve such a problem, the present invention is a method in which two or more kinds of small flow rate liquids are switched and pumped by a pump, mixed with a large flow rate compressed air sent from a compressed air supply source, and injected from a nozzle. In the gas-liquid mixed flow injection device, a flow rate adjusting valve for adjusting a flow rate of the liquid to be injected is provided in the vicinity of the nozzle, and further, compressed air sent from the compressed air supply source is supplied to the air through the air opening / closing valve. The gist of the present invention is to provide a gas-liquid mixed flow injection device that is configured to pump between a nozzle and a flow rate adjusting valve through a pipe.

  In addition, a bypass conduit that communicates between the pump downstream side and the air on-off valve downstream side is provided, and a bypass on-off valve is provided in the middle of the bypass conduit to switch and spray different liquids other than water, Before the liquid is switched, the air on / off valve is closed and the bypass on / off valve is opened to provide an apparatus provided with control means for injecting water for a certain period of time.

  Since the apparatus of the present invention is configured as described above, when various liquids are mixed with compressed air and ejected from the nozzle, the flow rate of each liquid can be adjusted at hand, so that the state of the liquid coming out of the nozzle Can be optimized while checking each time, so it is very efficient.

  Moreover, since the mixing part of the liquid and the compressed air is in the vicinity of the nozzle, the liquid to be ejected can be ejected uniformly without pulsation, and it is possible to cope with various ejections of cleaning and spraying.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an embodiment of the present invention. In the figure, reference numeral 1 denotes an apparatus main body, and an operation unit 2 including switches for switching the liquid to be ejected and driving / stopping the apparatus is provided at the upper part of the main body, and a water supply source 3 is provided at the bottom. The water tank 5 and the chemical containing tanks 6 to 9 are provided so that the water level is always kept constant by the float water supply valve 4.

  A suction pipe 10 is branched into each tank and inserted through solenoid valves 11 to 15, and the other side of the suction pipe 10 is connected to the suction side of the pump 16. A discharge pipe 17 is connected to the discharge side of the pump 16, and a nozzle 20 having a flow rate adjusting valve 19 is connected via a check valve 18.

  A return pipe 21 is provided on the discharge side and the suction side of the pump 16 to communicate with each other. When the flow rate adjustment valve 19 is closed via an unloader valve 22 capable of adjusting the flow rate. The load on the pump 16 is reduced by flowing water.

  An air pipe 24 is connected between the nozzle 20 and the flow rate adjusting valve 19 via the air on-off valve 25 and the check valve 26 so that the compressed air is fed into the nozzle 20 from the compressed air supply source 23. It is mixed with the liquid pumped from the pump 16 and ejected from the nozzle 20.

  Furthermore, a bypass line 28 is connected to the discharge line 17 and the air line 24 via a bypass on-off valve 27 on the downstream side of the respective check valves 18 and 26. The discharge pipe line 17 and the air pipe line 24 can be communicated and blocked.

  Reference numeral 29 denotes a control means including a relay and a microcomputer, which can receive a signal from the operation unit 2 and control the pump 16 and each electromagnetic valve.

  FIG. 2 is a cross-sectional view of the main part of the nozzle 20. A flexible tube 31 having a predetermined length is tightly fixed to the injection port 30 so as to cover it, and a trumpet-shaped guide tube is formed at the base of the injection port. 32 is screwed, and when the fluid is ejected from the ejection port 30, the tube 31 turns at a high speed along the inner wall of the guide tube 32. By using the nozzle configured in this way, a strong cleaning power can be obtained when used for cleaning, and when used for chemical spraying, the sprayed fluid becomes fine particles and a good spraying effect is obtained. Will be able to. However, the nozzle is not limited to this, and can be changed to various nozzles by the one-touch coupler 33.

  Next, the operation when this apparatus is used for washing a vehicle will be described. In this case, it is assumed that the chemical tanks 6, 7, and 8 contain foam detergent, antifoaming agent, and wax, respectively.

  First, the operator selects water with the cleaning liquid switching switch of the operation unit 2, and then presses the start switch. Upon receipt of the signal, the control means 29 opens the solenoid valve 11 and the air on-off valve 25 and drives the pump 16. Then, since a large amount of compressed air and a small amount of water are injected from the nozzle 20, the operator adjusts the amount of water to an optimum amount by the flow rate adjusting valve 19 and directs it toward the vehicle. Spray and perform preliminary cleaning to wash off dust on the surface.

  Next, when the foam detergent is selected in the operation unit 2, the solenoid valve 12 is opened and the foam detergent is pumped by the pump. Therefore, the operator adjusts the amount of the foam detergent to the optimum amount by the flow rate adjusting valve 19. Then, it is sufficiently foamed and injected toward the vehicle. Thereafter, the temporary stop switch of the operation unit 2 is pressed once, and hand washing is performed with a sponge or the like. When the temporary stop switch is pressed, the control means 29 receiving the signal closes the air on-off valve 25 and stops the pump 16.

  When hand washing is completed, in order to wash away the foam detergent, an antifoaming agent is selected with the washing liquid switching switch of the operation unit 2, and the start switch is pressed again. Then, since the control means 29 memorizes that the previously jetted liquid is a foam detergent and a liquid other than water, the foam detergent in the suction line 10, the discharge line 17 and the return line 21 is temporarily removed here. In order to perform the washing of the pipeline to be washed away, water is pumped and jetted from the nozzle 20. However, since the discharge pipe 17 is provided with the flow rate adjusting valve 19, the flow rate of water for washing the pipe line cannot be expected so much. As a result, it takes time for pipe cleaning, and the time required for the vehicle cleaning work itself becomes longer. Therefore, in order to shorten the pipe cleaning time, it is conceivable to simultaneously supply water to the air pipe 24 to increase the flow rate and to increase the amount of water ejected from the nozzle 20. In order to execute this, when the antifoaming agent is selected by the cleaning liquid changeover switch and the start switch is pressed, the control means 29 once opens the electromagnetic valve 11 and the bypass opening / closing valve 27 and drives the pump 16. Then, water flows through the suction line 10, the discharge line 17 and the return line 21, and the water flows into the nozzle from the air line 24 via the discharge line 17 and the bypass line 28 and is injected. Is done.

  After that, when the predetermined time has passed, the control means 29 closes the solenoid valve 11 and the bypass opening / closing valve 27 that have been opened earlier, and at the same time the foam detergent should be jetted out, assuming that the foam detergent has been completely washed away from the discharge pipe 17. In order to inject the foaming agent, the electromagnetic valve 13 is opened. Then, since the antifoaming agent is jetted from the nozzle 20, the operator adjusts the amount of the antifoaming agent to an optimum amount by the flow rate adjusting valve 19, and the foam adhering to the vehicle and the car wash area if necessary. Wash away detergent.

  Further, when wax is selected by the cleaning liquid changeover switch of the operation unit 2 in order to inject the wax, the wax is normally injected. However, as described above, the control means is used to perform the pipeline cleaning as described above. No. 29 performs the same control as described above, and once the operation of flowing water for a predetermined time is performed, the electromagnetic valve 14 is opened and wax is injected. Adjust the amount of wax to the optimum amount and spray it on the vehicle.

  When all the car washing operations are completed, the wax is washed out from the suction pipe 10, the discharge pipe 17, and the return pipe 21, so that when the operator depresses the stop switch of the operation unit 2, the control means 29 receives the signal. Then, the same control as described above is performed, and the operation of flowing water for a predetermined time is executed and the process is terminated.

  As described above, when different liquids other than water are used continuously, or when the last liquid used is other than water, pipe cleaning is performed by flowing water for a predetermined time. This is to prevent the different liquids from chemically reacting and solidifying or causing any other adverse effects.

  By the way, although it is not used directly in the car washing operation, for example, when partial cleaning of a wheel, a brake disk, or the like is performed only with a mixed fluid of water and air, only the air on-off valve 25 is opened and the compression is performed in order to blow off the attached moisture In the present apparatus, it is possible to perform a so-called blow operation by injecting only air from the nozzle.

  In this embodiment, the cleaning liquid can be selectively switched by the cleaning liquid changeover switch. However, the present invention can be similarly implemented by using an apparatus in which the cleaning liquid ejection time and sequence are programmed in advance.

1 is an overall configuration diagram of an apparatus according to an embodiment of the present invention. It is principal part sectional drawing of the nozzle used for the apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas-liquid mixed flow injection apparatus 5 Water tank 6-9 Chemical tank 11-15 Solenoid valve 16 Pump 19 Flow control valve 20 Nozzle 23 Compressed air supply source 24 Air pipe 25 Air on-off valve 27 Bypass on-off valve 28 Bypass pipe 29 Control means

Claims (2)

In a gas-liquid mixed flow injection device of a type in which two or more kinds of small flow rate liquids are switched and pumped by a pump, mixed with a large flow rate compressed air sent from a compressed air supply source and injected from a nozzle,
A flow rate adjusting valve for adjusting the flow rate of the liquid to be ejected is provided in the vicinity of the nozzle, and further, compressed air sent from a compressed air supply source is connected to the nozzle and the flow rate through an air line via an air opening / closing valve. A gas-liquid mixed flow injection device characterized by being pressure-fed between the regulating valve.   In the case where a bypass conduit that communicates the pump downstream side and the air on-off valve downstream side is provided, and a bypass on-off valve is provided in the middle of the bypass conduit to switch different liquids other than water and eject the liquid, 2. The gas-liquid mixed flow injection apparatus according to claim 1, further comprising a control unit that closes the air on-off valve and opens the bypass on-off valve and injects water for a predetermined time before switching.

Images