KR102097037B1 - Cleaning device for fin-tube of heat-exchanger - Google Patents

Abstract

The present invention relates to a cleaning device for a heat exchanger, which includes a cleaning nozzle which is provided on a slider and continuously cleans the whole stacked heat exchanger by spraying fluid continuously supplied according to the movement of a drive unit, a carriage, and the slider. Unlike the prior art, the present invention automatically moves the cleaning nozzle in the width and height directions of a fin-tube bundle stacked heat exchanger to spray fluid over the whole stacked heat exchanger, thereby preventing accidents due to operator′s high altitude work for cleaning a fin-tube and improving cleaning efficiency regardless of the skill level of an operator.

Description

Cleaning device of heat exchanger {CLEANING DEVICE FOR FIN-TUBE OF HEAT-EXCHANGER}

The present invention relates to a cleaning device of a heat exchanger, and more specifically, by cleaning the cleaning nozzle automatically in the width and height directions of the stacked heat exchanger of the fin tube bundle, the fluid can be injected into the fin tube throughout the stacked heat exchanger. According to the present invention, it is possible to prevent a safety accident due to a worker performing a high-level operation for cleaning the fin tube, and to a cleaning device of a heat exchanger to improve cleaning efficiency regardless of the skill of the operator.

The heat exchanger applied to the heat recovery steam generator (HRSG) of a power plant is usually formed in a bundle structure in which a plurality of fin tubes are densely stacked, so if the scale on the outer surface is not removed periodically, the heat transfer efficiency will decrease. Corrosion damage is caused. The universal method of removing the fin tube scale is carried out by processes such as high pressure water spray, steam spray, and coating solution spray. However, since it takes a lot of manpower to clean, there is an urgent need for technical supplementation to make it viable.

As prior art documents that can be referred to in this regard, Korean Registered Patent Publication No. 1053440 (Previous Document 1), Korean Registered Patent Publication No. 0472565 (Previous Document 2), and the like are known.

Prior Document 1 is a cleaning gun for washing the inside of the heat pipe of the steam generator, which can be gripped by an operator, and is coupled to one side of the handle part and the handle part capable of selectively discharging compressed air into the handle part, and through the handle part It includes a percussion part driven by the introduced compressed air, and a nozzle part coupled to the end of the percussion part to finally discharge the compressed air. Accordingly, it is expected to reduce the labor force, simplify the work process, and easily clean in a clean environment.

Prior Art Document 2 is a circulation flow path connecting the outlet line of the fluid and the pre-treatment and post-treatment cleaning liquid tanks, a cleaning liquid circulating means for circulating the pre-treatment cleaning liquid and the post-treatment cleaning liquid to a heat exchanger, a plurality of valves for selectively opening and closing the inflow and outflow paths, etc. It consists of. Accordingly, it is expected to have an effect that it is automatically performed by simply operating the valve to reduce the workforce and to easily remove the scale.

The above-described technical configuration is a background technology for helping understanding of the present invention, and does not mean a well-known prior art in the technical field to which the present invention pertains.

In a bundle heat exchanger with multiple stacked fin tubes applied to an existing power plant, HRSG, etc., as the worker removes the scale outside the fin tube in a tightly gripped state, a worker may cause safety accidents such as falling during high-altitude cleaning. There is a problem that the cleaning efficiency is lowered depending on the skill level.

Therefore, there is a need to improve this.

The present invention has been devised to improve the problems as described above, because the cleaning nozzle can be automatically moved in the width direction and the height direction of the stacked heat exchanger of the fin tube bundle, so that the fluid can be injected into the fin tube across the stacked heat exchanger. Accordingly, it is an object of the present invention to provide a cleaning device for a heat exchanger to prevent a safety accident due to a worker performing a high-level operation for cleaning the fin tube, and to improve the cleaning efficiency of the fin tube regardless of the skill level of the operator.

The cleaning apparatus of the heat exchanger according to the present invention includes: a transfer guide member made of at least one pair arranged side by side at regular intervals on a front side of a stacked heat exchanger of a fin tube, and each having a tension in the axial direction; A drive unit provided at the same or similar position in each of the adjacent conveying guide members and reciprocating along a conveying guide member corresponding to the same speed and in the same direction; A connecting beam disposed obliquely in the axial direction of the transfer guide member by connecting the adjacent drive units; A carriage provided on the connecting beam to be slidable along an axial direction; A slider connected to the carriage to reciprocate in a direction parallel to the connecting beam; And a cleaning nozzle provided on the slider and automatically cleaning the entire stacked heat exchanger by spraying the supplied fluid according to the movement of the drive unit, the carriage and the slider.

The driving unit includes a driving body that is connected and fixed to both sides along an axial direction of the connecting beam; A drive wheel rotatably provided in each of the drive bodies, rotated in both directions by a drive motor, and moved in one direction and the other direction along one side of a corresponding transfer guide member; A driven wheel moved in one direction and the other direction along the other side of the corresponding transfer guide member; A transfer plate rotatably provided with the driven wheel, and provided to be movable relative to the drive body so that the drive body can be detachably attached to and from the transfer guide member; And a restraining portion for restraining the position of the conveying plate so that the driven wheel remains connected to the corresponding conveying guide member.

The slider is provided with contact sensors on both sides along the axial direction, and each of the contact sensors is provided with a contact plate, so that when the contact plate comes into contact with an obstacle, the carriage is moved in a direction opposite to the direction in which it is immediately transported. do.

The connecting beam is characterized by having a guide rail along the axial direction.

The carriage includes a transport body mounted on the connecting beam; A hinge block having one side hinged to the transfer body by a hinge pin; A rolling wheel which is rotatably provided on the hinge block and is moved in one direction or the other direction along the guide rail by receiving rotational force when driving the operating motor; And a restraining pin that restrains the other side of the hinge block to the transport body so that the rolling wheel remains in contact with the guide rail.

The connecting beam is characterized in that the support beams are arranged side by side, and the transfer body is connected and fixed to a bracket that is moved or fixed along the support beam.

The cleaning nozzle is rotatably provided on the slider by a pivot pin, and is hinged to a shaft that reciprocates along the axial direction of the slider by an external force and is automatically rotated.

As described above, the cleaning apparatus of the heat exchanger according to the present invention, unlike the prior art, automatically moves the cleaning nozzle in the width and height directions of the finned tube bundle stacked heat exchanger while transferring fluid to the fin tube throughout the stacked heat exchanger. As it can be sprayed, it is possible to prevent a safety accident due to a worker performing a high-level operation to clean the fin tube, and to improve the cleaning efficiency of the fin tube regardless of the skill of the operator.

1 is a plan view of a cleaning device of a heat exchanger according to an embodiment of the present invention.
Figure 2 is a front view of the cleaning device of the heat exchanger according to an embodiment of the present invention.
Figure 3 is a side view of the cleaning device of the heat exchanger according to an embodiment of the present invention.
4 is a view showing a state in which the driving unit of the cleaning device of the heat exchanger according to an embodiment of the present invention is installed on a transfer guide member.
5 is a view showing a state in which the drive unit of the cleaning device of the heat exchanger according to an embodiment of the present invention is separated from the transfer guide member.
6 is a view showing a state in which the carriage of the cleaning device of the heat exchanger according to an embodiment of the present invention is mounted on a connecting beam.
7 is a view showing a state in which the carriage of the cleaning device of the heat exchanger according to an embodiment of the present invention can be separated from the connecting beam.
8 is a view showing a state in which the driving unit of the cleaning device of the heat exchanger according to an embodiment of the present invention is installed on a transfer guide member.

Hereinafter, an embodiment of a cleaning device for a heat exchanger according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the present specification.

1 is a plan view of a cleaning device of a heat exchanger according to an embodiment of the present invention, Figure 2 is a front view of a cleaning device of a heat exchanger according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is a side view of the cleaning device of the heat exchanger.

4 is a view showing a state in which the driving unit of the cleaning device of the heat exchanger according to an embodiment of the present invention is installed on a transfer guide member, and FIG. 5 is a driving device of the cleaning device of a heat exchanger according to an embodiment of the present invention It is a view showing a state in which the unit is separated from the transfer guide member.

6 is a view showing a state of mounting the carriage of the cleaning device of the heat exchanger according to an embodiment of the present invention to the connecting beam, Figure 7 is connecting the carriage of the cleaning device of the heat exchanger according to an embodiment of the present invention It is a view showing a state that can be separated from the beam.

8 is a view showing a state in which the driving unit of the cleaning device of the heat exchanger according to an embodiment of the present invention is installed on a transfer guide member.

1 to 8, the cleaning apparatus 100 of a heat exchanger according to an embodiment of the present invention is a fluid (gas or) in a plurality of fin tubes of a stacked heat exchanger 10 applied to a heat recovery boiler of a power plant, etc. Liquid) to clean the fin tube.

To this end, the cleaning device 100 of the heat exchanger includes a transport guide member 200, a driving unit 300, a connecting beam 400, a carriage 500, a slider 600, and a cleaning nozzle 700.

The transfer guide member 200 is made of at least one pair arranged side by side with a predetermined interval at a front side of the fin tube bundle stacked heat exchanger 10. For convenience, the transfer guide member 200 is illustrated as being at least a pair of chains spaced apart at regular intervals in the horizontal width direction of the fin tube. Of course, the transfer guide member 200 can be variously applied.

In addition, each of the transfer guide members 200 is arranged in the vertical width direction to serve to guide the driving unit 300 in the vertical direction. Accordingly, the transfer guide member 200 must maintain tension. Therefore, each of the transfer guide members 200 is fixedly installed on the stand 210. That is, the transfer guide member 200 maintains tension as both sides are fixedly connected to the stand 210 in the axial direction.

Of course, the stand 210 can be deformed into various shapes.

The driving unit 300 is provided to reciprocate in the axial direction of the transfer guide member 200 along each of the transfer guide members 200.

The connecting beam 400 serves to connect the adjacent driving units 300, so that the driving units 300 provided in each transfer guide member 200 are disposed at the same or similar positions, and the connected driving units ( 300) serves to guide the movement in the same direction and the same speed. At this time, the connecting beam 400 is disposed particularly inclined in an axial direction of the transfer guide member 200. Of course, the connecting beam 400 can be deformed into various shapes.

The carriage 500 is provided on the connecting beam 400 to be able to slide along the axial direction. At this time, the carriage 500 is guided by automatic reciprocating movement along the connecting beam 400 by driving of the operating motor 532.

In addition, the slider 600 is connected to the carriage 500 to enable reciprocating movement in a direction parallel to the connecting beam 400. Thus, the slider 600 is able to reciprocate along the axial direction in the same direction and the same speed as the carriage 500. The slider 600 can be deformed into various shapes.

The cleaning nozzle 700 serves to inject the fluid supplied to the slider 600 into the stacked heat exchanger 10. At this time, the cleaning nozzle 700 is moved in the vertical direction by the movement of the driving unit 300, and is moved in the horizontal direction by the carriage 500 and the slider 600. Therefore, the cleaning nozzle 700 automatically cleans the entire stacked heat exchanger 10.

In particular, although the cleaning nozzle 700 may be fixedly installed directly on the carriage 500, in this case, as the length of the connecting beam 400 becomes longer to correspond to the horizontal width of the stacked heat exchanger 10, the connecting beam ( 400) may increase the load of the driving unit 300 connected to the transfer guide member 200 or bent downward.

Due to this, instead of reducing the length of the connecting beam 400, the carriage 500 is reciprocated in the axial direction of the connecting beam 400, and the slider 600 is reciprocated in the axial direction with respect to the carriage 500, The durability of the connecting beam 400 and the slider 600 is increased, and the cleaning nozzle 700 is capable of cleaning the fin tube by spraying fluid over the top, bottom, left, and right of the stacked heat exchanger 10.

On the other hand, the driving unit 300 includes a driving body 310, a driving wheel 320, a driven wheel 330, a transfer plate 340 and a restraining portion 350.

The driving body 310 forms the outer shape of the driving unit 300 and is fixedly connected to both sides along the axial direction of the connecting beam 400 and is connected to the corresponding conveying guide member 200 to convey the conveying guide member 200 ) Is guided to move up and down.

Of course, the driving body 310 can be deformed into various shapes.

The driving wheel 320 is provided with one or more rotatable on each of the driving bodies 310, rotated in both directions by the driving motor 322, and moves in one direction and the other direction along one side of the corresponding transfer guide member 200. do. At this time, the transfer guide member 200 is applied as a chain, and the driving wheel 320 is applied as a gear. Thus, the driving wheel 320 is moved in the longitudinal direction (up and down direction) along the transfer guide member 200 while slip is prevented.

The driven wheel 330 is moved in one direction and the other direction along the other side of the corresponding transfer guide member 200. In particular, the driving wheel 320 is connected to one side of the transfer guide member 200, and the driven wheel 330 is connected to the other side of the transfer guide member 200, so that the drive body 310 is the transfer guide member 200 ), It is possible to move along the transfer guide member 200 while being prevented from leaving. One or more driven wheels 330 are provided.

The transfer plate 340 is provided with a driven wheel 330 rotatable, and is provided to be movable relative to the drive body 310. So, due to the movement of the transfer plate 340, the driven wheel 330 is connected to the other side of the transfer guide member 200, so that the drive body 310 remains connected to the transfer guide member 200. And, when the driven wheel 330 is spaced from the other side of the transfer guide member 200, the drive body 310 is detachable from the transfer guide member 200.

At this time, the transfer plate 340 is slidably moved with respect to the driving body 310 by the LM guide 342 and the position movement is possible. Of course, the LM guide 342 can be variously modified, and the transfer plate 340 is prevented from being randomly separated from the drive body 310 by the LM guide 342.

In addition, the restraining part 350 serves to constrain the position of the conveying plate 340 with respect to the drive body 310 so that the driven wheel 330 is connected to the corresponding conveying guide member 200.

That is, after the transfer plate 340 is moved forward so that the driven wheel 330 is connected to the other side of the transfer guide member 200, the restraining portion 350 moves the transfer plate 340 with respect to the driving body 310. It serves to fix the position. At this time, the restraining unit 350 can be applied in various ways. In one example, the constraining part 350 is connected to the transfer plate 340 so as to be idle on the transfer plate 340, the bolt is screwed to the edge of the drive body 310, and the bolt is optionally at the drive body 310 It may include a nut that prevents rotation.

After the restraining portion 350 releases the binding force to the transfer plate 340, the transfer plate 340 is capable of moving the position.

In addition, the driving body 310 is provided with a proximity sensor 312 on the lower side, or on the upper side and the lower side. So, when the proximity sensor 312 detects an object, the driving motor 322 is controlled so that the driving body 310 is no longer transported in the traveling direction.

Meanwhile, the carriage 500 is automatically reciprocated along the connecting beam 400.

To this end, the connecting beam 400 is provided with a guide rail 430 along the axial direction. The guide rail 430 can be modified in various shapes.

In addition, the carriage 500 includes a transport body 510, a hinge block 520, a rolling wheel 530, and a restraining pin 540.

The transfer body 510 is mounted on the connecting beam 400. In particular, since the connecting beam 400 is partially inserted into the rear side of the transfer body 510, the transfer body 510 can be stably mounted on the connecting beam 400.

The hinge block 520 is hinged to one side of the transfer body 510 by a hinge pin 522. At this time, it is assumed that the transport body 510 passes through the hole at a position corresponding to the hinge block 520. Of course, the hinge block 520 can be modified in various shapes.

The rolling wheel 530 is rotatably provided on the hinge block 520, and a part of the circumferential surface is exposed toward the guide rail 430 to come into contact with the guide rail 430. Then, the rolling wheel 530 is forcibly rotated by receiving the driving force of the operating motor 532. As a result, as the rolling wheel 530 rolls along the guide rail 430, the transport body 510 is able to reciprocate along the connecting beam 400.

The restraining pin 540 serves to constrain the other side of the hinge block 520 to the transfer body 510 so that the rolling wheel 530 remains in contact with the guide rail 430. Of course, when the restraining pin 540 removes the restraining force to the hinge block 520, the hinge block 520 is rotated based on the hinge pin 522. So, the rolling wheel 530 is spaced apart from the guide rail 430. In this state, the transfer body 510 is mounted on the connecting beam 400. After the transfer body 510 is mounted on the connecting beam 400, the hinge block 520 is rotated in the opposite direction, and then, as the restraining pin 540 constrains the hinge block 520 to the transfer body 510, The rolling wheel 530 comes into contact with the guide rail 430.

On the other hand, the slider 600 is connected to the transfer body 510 so as to be able to reciprocate in the axial direction of the connecting beam 400 with respect to the transfer body 510. In particular, the slider 600 can be reciprocated automatically or manually with respect to the transfer body 510.

That is, the slider 600 arranges a support beam (not shown) side by side, and the transport body 510 extends the bracket 550 to connect to the support beam. So, the bracket 550 can be moved or fixed along the support beam. Of course, the bracket 550 can be deformed into various shapes.

In addition, the slider 600 is provided with contact sensors 610 on both sides along the axial direction. Then, each of the contactors 610 connects the contact plates 620. Accordingly, when the contact plate 620 contacts the obstacle of the stacked heat exchanger 10, as the contact sensor 610 detects it, the operation motor 532 for forcibly transporting the carriage 500 is the carriage 500 It is operated to move in the opposite direction to the direction to be immediately transported.

Of course, even if the contact sensor 610 is in direct contact with an obstacle, the carriage 500 can switch the transport direction. The contact plate 620 serves to increase the detection range of the obstacle. The contact plate 620 can be deformed into various shapes, and is connected to the contact sensor 610 in various ways. In addition, a spring (not shown) may be disposed between the corresponding contact plate 620 and the contact sensor 610 for cushioning.

On the other hand, the cleaning nozzle 700 is rotatably provided on the slider 600 by the pivot pin 710 so as to be able to inject a wide range of fluid to the fin tube of the stacked heat exchanger (10). At this time, the pivot pin 710 is rotatably connected to the slider 600 to approximately the middle portion in the axial direction of the cleaning nozzle 700.

Then, the slider 600 connects the shaft 720 reciprocating along the axial direction by the movable motor 722. In addition, the shaft 720 hinges the rear side in the axial direction of the cleaning nozzle 700. So, when the shaft 720 receives the movable force of the movable motor 722 and reciprocates in the axial direction, the cleaning nozzle 700 is automatically reciprocated based on the pivot pin 710.

In addition, the carriage 500 may include a lighting member 560. The lighting member 560 serves to visually check the cleaning degree of the stacked heat exchanger 10 due to the fluid injection of the cleaning nozzle 700 in a dark indoor space.

The present invention has been described with reference to the embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art to which the art belongs can various modifications and equivalent other embodiments from this. Will understand. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: stacked heat exchanger 100: cleaning device
200: transfer guide member 300: drive unit
310: drive body 320: drive wheel
330: Follower wheel 340: Transfer plate
350: restraint 400: connecting beam
430: guide rail 500: carriage
510: transport body 520: hinge block
530: rolling wheel 540: restraint pin
600: slider 610: contact sensor
620: contact plate 700: cleaning nozzle

Claims (6)

A transfer guide member formed of at least one pair spaced apart at predetermined intervals on the front side of the fin tube bundle stacked heat exchanger, and maintaining tension in each axial direction;
A drive unit provided at the same or similar position in each of the adjacent conveying guide members and reciprocating along a conveying guide member corresponding to the same speed and in the same direction;
A connecting beam disposed obliquely in the axial direction of the transfer guide member by connecting the adjacent drive units;
A carriage provided on the connecting beam to be slidable along an axial direction;
A slider connected to the carriage to reciprocate in a direction parallel to the connecting beam; And
Cleaning of the heat exchanger is provided on the slider, and includes a cleaning nozzle that automatically cleans the entire stacked heat exchanger by spraying the supplied fluid according to the movement of the drive unit, the carriage and the slider. Device.
According to claim 1, The drive unit,
A driving body connected and fixed to both sides along the axial direction of the connecting beam;
A drive wheel rotatably provided in each of the drive bodies, rotated in both directions by a drive motor, and moved in one direction and the other direction along one side of a corresponding transfer guide member;
A driven wheel moved in one direction and the other direction along the other side of the corresponding transfer guide member;
A transfer plate rotatably provided with the driven wheel, and provided to be movable relative to the drive body so that the drive body can be detachably attached to and from the transfer guide member; And
And a restraining portion for restraining the position of the transfer plate so that the driven wheel is connected to a corresponding transfer guide member.
According to claim 1,
The slider is provided with contact sensors on both sides along the axial direction,
Each of the contact sensors is provided with a contact plate,
When the contact plate is in contact with an obstacle, the carriage is cleaned in the heat exchanger, characterized in that it is moved in the opposite direction to the direction immediately conveyed.
According to claim 1,
The connecting beam is provided with a guide rail along the axial direction,
The carriage includes a transport body mounted on the connecting beam;
A hinge block having one side hinged to the transfer body by a hinge pin;
A rolling wheel which is rotatably provided on the hinge block and is moved in one direction or the other direction along the guide rail by receiving rotational force when driving the operating motor; And
And a restraining pin constraining the other side of the hinge block to the transfer body so that the rolling wheel remains in contact with the guide rail.
The method of claim 4,
The connecting beam arranges support beams side by side,
The transfer body is a cleaning device for a heat exchanger, characterized in that connected to the bracket to be moved or fixed along the support beam.
According to claim 1,
The cleaning nozzle is rotatably provided on the slider by a pivot pin, and is connected to a shaft that is reciprocated along the axial direction of the slider by an external force to be hinged and automatically rotated.

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