JP2939705B2 - High pressure water flow state detection device of high pressure washer with heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for injecting high-pressure hot water to wash a high-pressure washing machine with a heating device for washing an outer wall and a window glass of a high-rise building.
The present invention relates to a high-pressure liquid flow state detecting device that detects whether the liquid is stopped.

[0002]

2. Description of the Related Art Conventionally, whether a liquid is flowing or stopped in a high-pressure liquid passage of a high-pressure washing machine with a heating device for washing an outer wall and a window glass of a high-rise building by injecting high-pressure hot water. As a high-pressure liquid flow state detecting device for detecting the pressure, the one shown in FIG. 1 is used. That is, when the magnetic float 52 is pressed against the valve seat 53 by the spring 51 into the valve chamber 50 provided in the high-pressure water flow path, and when the high-pressure liquid 54 flows from the upstream 55 to the downstream 56, the magnetic float 52 5
2 is separated from the valve seat 53, and the magnetic float 52
Is detected by the reed switch 57.

However, the above-described conventional high-pressure liquid flow state detecting device uses the reed switch 57 to detect the displacement of the magnetic float 52.
The valve seat 53 must be made of a non-magnetic material and its thickness must be as small as possible so that the magnetic force of the magnetic float 52 is not attenuated as much as possible, so that the valve seat 53 can be worn by water flow. It is necessary to increase the wall thickness as a wear allowance, and it is not possible to reduce the wall thickness from the viewpoint of maintaining the pressure resistance against the high-pressure liquid. Swings or vibrates, the spring 5
Due to the fact that 1 is strengthened (stiffness is increased), there is a problem that there is a limit in increasing the sensitivity so that a small pressure difference can be detected. In addition, when the cleaning operation is stopped, the high-pressure high-temperature water passage leading to the heating device, the high-pressure hose, and the cleaning gun is operated at a working pressure (for example, 200 to 500 kg).
/ Cm ² ), which is dangerous.

[0004]

The problem to be solved by the invention is that the above-mentioned conventional high-pressure liquid flow state detecting device is
The spring 51 must be strengthened in order to suppress the rocking or vibration of the magnetic float 52 due to the fact that the thickness cannot be reduced from the viewpoint of maintaining the pressure resistance to the high-pressure liquid, and the kinetic energy of the water flow and its pulsating operation. (Increased rigidity), there is a limit to increasing the sensitivity, and therefore, with the cleaning operation stopped, the heating device,
The high-pressure high-temperature water channel leading to the high-pressure hose and the cleaning gun is dangerous because it is maintained at the working pressure (for example, 200 to 500 kg / cm ² ).

[0005]

A description will be given with reference to FIGS. In the first invention, a throttle valve 11 is provided in the high-pressure water flow path 10.
And a bypass 14 connecting the upstream side 12 and the downstream side 13 of the throttle valve 11 is provided. An upright cylinder portion 15 for forming a vertical upward flow is provided in the bypass 14, and a piston is provided in the upright cylinder portion 15. The non-translucent floating member 16 is slidably fitted tightly, and the upper surface radial groove C and the center hole D of the floating member 16 are provided.
Rises due to the differential pressure generated between the upstream opening 17 and the downstream opening 18, but falls when the differential pressure is zero,
Further, a high pressure water flow state in which the light sensor 20 detects light 19 passing through the cylinder portion 15 at one of the upper and lower levels of the float 16 and outputs a signal indicating whether or not the light is blocked. It is a detection device.

In the second invention, high-pressure water from a high-pressure water generator 72 mounted on an automobile 80 is heated by a heating device 73, sent to a cleaning gun 74 via a high-pressure hose 78, and supplied to a nozzle 75.
In a high-pressure washing machine 70 with a heating device for ejecting a high-pressure high-temperature washing liquid from the
An upright cylinder portion 15 for forming a vertical upward flow is provided therein, and a piston-like non-light-transmitting float 16 is slidably fitted in the upright cylinder portion 15 slidably.
The upper surface radial groove C or the center hole D is provided, and
The float 16 has an upstream opening 17 and a downstream opening 18.
However, when the pressure difference is zero, the pressure decreases and the light 19 passing through the cylinder 15 to the upper or lower level of the float 16 is transmitted to the optical sensor 2.
0 is detected, a signal is output, and based on the signal, when the flow of the cleaning liquid is stopped, the heating of the heating device 73 and the pressurization of the high-pressure generating device 72 are controlled so as to be stopped. Device.

[0007]

First, a high-pressure washing machine with a heating device that sprays high-pressure hot water to wash the outer wall, window glass, and the like of a high-rise building will be described. Reference numeral 70 denotes a high-pressure washing machine with a heating device mounted on an automobile 80, which is configured as follows. 71
Is a water tank, 72 is a high-pressure water generating section mainly composed of a high-pressure pump, 73 is a heating device provided with a boiler for heating the high-pressure water obtained in the high-pressure water generating section 72, and 74 and 75 are the heating devices, respectively. The cleaning gun sprays the high-pressure high-temperature water obtained by the device 73, and a nozzle attached to the tip of the cleaning gun 73.

[0008] 10 is a high-pressure water generator 72 from the heating device 73
A high-pressure water flow path for guiding high-pressure water to the water tank 71; a return pipe for returning part or all of the high-pressure water generated in the high-pressure water generation section 72 to the water tank 71; 40 a downstream side of the high-pressure water flow path 10; A flow state detection device provided on the upstream side for detecting the flow state, a pressure regulator 60 provided in the middle of the return pipe 30 and adjusting the pressure of the high-pressure high-temperature water generated in the heating device 73;
A control unit 76 controls the temperature and pressure based on the detection values of the flow state detection device 40 (flow state) and the heating device 73 (pressure / temperature). In addition, 77 is a water absorption pipe connecting the water tank 71 and the high-pressure water generating section 72, and 78 is a heating device 73.
And a high-pressure hose connecting the cleaning gun 74 to the cleaning gun 74.

Next, the flow state detecting device 40 of the present invention will be described. 11 is a throttle valve provided in the high-pressure water flow path 10, 14
Is the upstream side 12 and the downstream side 13 of the throttle valve 11.
15 is a bypass provided to connect the
An upright cylinder portion 16 provided to form a vertical upward flow therein is a piston-like non-translucent float slidably fitted in the upright cylinder portion 15,
Is configured to rise due to a differential pressure generated between the upstream opening 17 and the downstream opening 18, but to decrease when the differential pressure is zero, and to suppress pulsation on the upper surface thereof. A radial groove C and a center hole D are provided. Reference numeral 19 denotes a light which passes through the cylinder 15 to either the upper or lower level of the float 16 and 20 denotes an optical sensor which detects the light 19 and outputs a signal.

Next, the high-pressure water flow state detecting device will be described with reference to FIGS. 2 to 4. When the float 16 does not allow water to flow through the high-pressure water flow path 10, the float 16 moves upstream based on the flow velocity of the throttle valve 11. When the differential pressure generated between the opening 17 and the downstream opening 18 is zero, the cylinder does not float, and when water flows through the high-pressure water flow path 10, the cylinder generates a small differential pressure of 1 kg / cm ² or less. The floating state of the high pressure water can be detected by passing or blocking the light 19 by floating in the state where the water does not substantially flow into the part 15. When the flow state detection device 40 detects that the high-pressure water does not flow through 10, the heating device 73 is stopped, and at the same time, the pressures of all the water channels from the heating device 73 to the cleaning gun 74 can be brought to zero as much as possible, Extremely safe Is high. The sensitivity of the flow state detection device 40 can be increased according to conditions by changing the throttle ratio of the throttle valve 11 and the sectional area, height, and specific gravity of the float 19.

Moreover, during use, there is almost no wear due to water due to friction and pulsation of the float 16 with high-pressure water,
4. The cylinder section 15 does not need to consider the influence on the magnetic force, and does not require special consideration for the thickness and material.
All the conventional design problems can be solved. In addition, workability is improved by using the high-pressure hose 78 which is easy to bend.

[0012]

Since the present invention is configured as described above, during use, there is almost no wear of water due to friction and pulsation of the float 16 with high-pressure water, and the bypass 14 and the cylinder 15 also have no effect on magnetic force. There is no need to consider it, and no special consideration is required for the wall thickness and material. Moreover, when the cleaning operation is stopped, the pressure of all the water channels from the heating device 73 to the cleaning gun 74 can be reduced to almost zero. It is very safe, and the throttle ratio of the throttle valve 11 and the cross-sectional area of the float 16
By changing the height and the specific gravity, the sensitivity of the flow state detecting device 40 can be increased according to the conditions.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a conventional example.

FIG. 2 is a sectional view showing an embodiment of the present invention.

FIG. 3 is a perspective view of a float according to the present invention.

FIG. 4 is a principle view of a washing machine mounted on an automobile.

FIG. 5 is a side view of an automobile equipped with a washing machine.

FIG. 6 is a plan view of the automobile shown in FIG. 5;

FIG. 7 is a rear view of the automobile shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 High-pressure water flow path 11 Throttle valve 12 Upstream side 13 Downstream side 14 Bypass 15 Upright cylinder part 16 Non-translucent float 17 Upstream opening 18 Downstream opening 19 Light 20 Optical sensor 30 Return pipe 40 Flow state detecting device 50 Valve Chamber 51 Spring 52 Magnetic float 53 Valve seat 54 High-pressure liquid 55 Upstream side 56 Downstream side 57 Reed switch 60 Pressure regulator 70 High-pressure washing machine 71 Water tank 72 High-pressure water generation unit 73 Heating device 74 Cleaning gun 75 Nozzle 76 Control unit 77 Water absorption Tube 78 High pressure hose C Radial groove D Center hole

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B60P 3/30 B60P 3/30 G01F 1/38 G01F 1/38 G01P 5/14 G01P 5/14 G

Claims (2)

(57) [Claims] A throttle valve (11) is provided in a high-pressure water flow path (10), and an upstream side (12) and a downstream side (1) of the throttle valve (11) are provided.
3) is provided, and an upright cylinder portion (15) for forming a vertical upward flow is provided in the bypass (14). In the upright cylinder portion (15),
The piston-like non-light-transmitting float (16) is slidably fitted tightly, and the upper face radial groove (C) and the center hole (D) of the float (16) are provided. It rises due to the differential pressure generated between the upstream opening (17) and the downstream opening (18), but falls when the differential pressure is zero,
Further, the light sensor (20) detects the light (19) passing across the cylinder portion (15) at the upper or lower level of the float (16), and outputs a signal. State detection device. 2. A high pressure water from a high pressure water generating section (72) mounted on an automobile (80) is heated by a heating device (73) and sent to a cleaning gun (74) via a high pressure hose (78). In the high-pressure washing machine (70) with a heating device for ejecting the high-pressure high-temperature washing liquid from (75),
An upright cylinder portion (15) for forming a vertical upward flow is provided in a bypass (15) provided in the fin, and a piston-like non-light-transmitting float (16) is slidably packed in the upright cylinder portion (15). The float (16) is provided with an upper surface radial groove (C) and a center hole (D), and the float (16) has an upstream opening (17) and a downstream opening (18). ), But falls when the pressure difference is zero, and falls to either the upper or lower level of the float (16) and the light (19) passed across the cylinder (15). Is detected by the optical sensor (20), and a signal is output,
A high-pressure water flow state detection device that controls the heating of the heating device (73) and the pressurization of the high-pressure generating device (72) to stop when the flow of the cleaning liquid stops based on the signal.