JP6950419B2 - Fin tube cleaning jig and cleaning method - Google Patents

Description

The present invention relates to a jig and a method for high-pressure water cleaning for removing deposits adhering to fin tubes used in heat exchangers and the like.

In the air-cooled heat exchangers of various plants, dust and dead insects adhere to the outer periphery of the fin tube during the operation, which is a factor of deteriorating the thermal efficiency. Therefore, the outer periphery of the fin tube of the heat exchanger is regularly cleaned by removing deposits with high-pressure water sprayed from the nozzle, but the thin-walled aluminum fins are bent or damaged by the high-pressure water. I have something to do.

That is, conventionally, the cleaning nozzle is operated by relying on the feeling of the cleaning worker. If the distance between the nozzle and the fin tube is too close, or if the angle of the nozzle with respect to the fin tube is significantly deviated, the impact force of high-pressure water will damage the thin-walled aluminum fins. Further, if the nozzle is moved too far from the fin tube due to fear of damage to the thin aluminum fins, the impact force of the high-pressure water is weakened, the cleaning effect is reduced, and the cleaning time is lengthened.

Special Publication No. 57-2997 Japanese Unexamined Patent Publication No. 2011-7360

The present invention maintains the distance between the nozzle and the fin tube and the angle of the nozzle with respect to the fin tube within an appropriate range when performing high-pressure water cleaning of the fin tube, maintains the soundness of the thin-walled fin, and improves the cleaning efficiency. It is an object of the present invention to provide a jig and a cleaning method using the jig.

The fin tube cleaning jig of the present invention is a fin tube cleaning jig having a cleaning gun provided with a high-pressure water injection nozzle at the tip, and comprises a distance sensor for measuring the distance between the cleaning gun and the fin tube, and the fin tube cleaning jig. It is characterized by being provided with an angle measuring means for measuring the angle of the cleaning gun.

In one aspect of the present invention, the angle measuring means is an angle sensor.

In one aspect of the present invention, there is provided a warning generating means for generating a warning when at least one of the distance measured by the distance sensor and the angle measured by the angle measuring means deviates from a predetermined range.

In the fin tube cleaning method of the present invention, high-pressure water is sprayed from the fin tube cleaning jig of the present invention to clean the fin tubes.

According to the fin tube cleaning jig of the present invention, the distance between the cleaning gun and the fin tube and the angle of the cleaning gun can be measured, so that the distance between the cleaning gun and the fin tube and the angle of the cleaning gun are set within an appropriate range. The fin tube can be kept clean. This makes it possible to efficiently clean the fin tube without damaging it.

In particular, by issuing a warning when the above distance and angle deviate from the appropriate range, the distance and angle can be reliably maintained within a predetermined range.

It is a side view which shows the cleaning method which concerns on embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. It is a side view of the fin tube cleaning jig. It is explanatory drawing of the cleaning position.

Hereinafter, embodiments will be described with reference to FIGS. 1 to 4. In this embodiment, as shown in FIG. 1, a group of fin tubes in which a large number of fin tubes 10 are arranged in the vertical direction in the longitudinal direction of the fin tubes is cleaned with high-pressure water jetted from the fin tube cleaning jig 1. .. As shown in FIGS. 2 and 4, the fin tube 10 includes a large number of fins 11.

FIG. 3 is a side view of the fin tube cleaning jig 1 according to the embodiment. The fin tube cleaning jig 1 is attached to a cleaning gun 3 having a nozzle 2 at the tip and a high-pressure water hose 4 connected to the rear end via mounting blankets 7 and 8, respectively. It is equipped with a distance sensor 5, an angle sensor 6, and the like. A grip handle 9 is provided in the middle of the cleaning gun 3 in the longitudinal direction, and the grip handle 9 is provided with a lever 9a for switching between injection and stopping of high-pressure water.

Examples of the distance sensor 5 include a laser type and an ultrasonic type. However, considering the influence of mist and dirt scattered during cleaning on the sensor and the shape of the object to be cleaned, the ultrasonic type with less measurement obstruction factors is desirable. ..

As the angle sensor 6, a sensor capable of measuring at least an angle in the elevation direction (vertical direction) of the cleaning gun 3 is used.

The detection signals of the distance sensor 5 and the angle sensor 6 are input to the warning generator (not shown). The warning generator may be provided in the cleaning gun 3, but a transmitter may be provided in the cleaning gun 3 to transmit to a warning generator provided separately from the cleaning gun.

Specifically, for example, the warning generator can be installed on the helmet of the worker P, the instrument panel or the instrument box (not shown) arranged in the vicinity of the worker P.

This warning generator includes a predetermined range (appropriate range) or reference value of the distance from the cleaning gun to the fin tube to be cleaned, the direction of the cleaning gun and the front surface of the fin tube group (operator of a parallel body of fin tubes 10). Comparison between a storage unit that stores a predetermined range (appropriate range) or reference value of the intersection angle (particularly the elevation direction angle) with the P side), the input measurement distance and measurement angle, and these predetermined ranges. A unit and a warning generating means for generating a warning operation signal when at least one of the measuring distance and the measuring angle deviates from the predetermined range is provided.

As the warning generating means, a warning sound generator such as a buzzer, a warning light generator such as a rotating light or a flashing light, or the like can be used.

In order to store the predetermined range in the storage unit, an upper limit value and a lower limit value of an appropriate range of distance and angle or a reference value (optimum value) of the distance and angle is input by an input means including a touch panel and a keyboard. Also, a reference value (optimum value) may be set as follows. That is, the worker P holds the cleaning gun 3, and positions the cleaning gun at a position where the longitudinal direction of the cleaning gun 3 is perpendicular to the front surface of the fin tube group and the distance between the cleaning gun 3 and the fin tube is a specified distance. In the set state (reference state), touch the storage setting switch to set the distance and angle of the reference state in the storage unit.

When cleaning the fin tube 10 by injecting high-pressure water from the nozzle 2 of the cleaning gun 3, at least one of the distance and the angle of the cleaning gun 3 deviates from the distance and the angle in the reference state by a predetermined value or more and deviates from the appropriate range. If so, a warning is generated to notify the operator P that the distance or angle of the cleaning gun 3 is inappropriate. If the worker P corrects the distance and angle of the cleaning gun 3 and the distance and angle fall within the predetermined range, the warning stops, so that the worker P always keeps the cleaning gun 3 in an appropriate distance range and angle range. be able to.

As a result, high-pressure water is always applied to the fin tube 10 from an appropriate distance at an appropriate angle, and the fin tube can be sufficiently cleaned while preventing damage (for example, deformation) of the fin 11 of the fin tube 10.

In one example of the present invention, the pressure of the washing water is preferably about 2 to 20 MPa. The angle of the cleaning gun 3 is preferably about ± 15 ° in the reference state, and the distance between the nozzle 2 and the front surface of the fin tube group is preferably about 1000 to 2000 mm. When this range is illustrated, it becomes as shown in the "appropriate range" of FIG.

The above embodiment is an example of the present invention, and the present invention may be an embodiment other than the above. For example, in the above embodiment, the angle sensor 6 is used, but as an alternative to the angle sensor, a plurality of distance sensors may be used to measure the angle.

1 Fin tube cleaning jig 2 Nozzle 3 Cleaning gun 4 High pressure water hose 5 Distance sensor 6 Angle sensor 10 Fin tube 11 Fin

Claims (4)

In a fin tube cleaning jig having a cleaning gun equipped with a high-pressure water injection nozzle at the tip.
A distance sensor that measures the distance between the cleaning gun and the fin tube,
A fin tube cleaning jig provided with an angle measuring means for measuring the angle of the cleaning gun. The fin tube cleaning jig according to claim 1, wherein the angle measuring means is an angle sensor. The first or second aspect of the present invention is characterized in that the warning generating means for generating a warning when at least one of the distance measured by the distance sensor and the angle measured by the angle measuring means deviates from a predetermined range is provided. Fin tube cleaning jig. A method for cleaning a fin tube, which cleans the fin tube using the fin tube cleaning jig according to any one of claims 1 to 3.

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