KR102797487B1 - Pipe cleaning equipment using water jet - Google Patents

Abstract

A pipe cleaning device using a water jet according to the present invention is characterized by including: a high-pressure water flow control unit which receives high-pressure water from the outside and outputs it to a spray hose having a nozzle at a tip thereof or blocks the high-pressure water from being output to the spray hose and bypasses it; a hose transfer unit which is installed at a position spaced apart from the high-pressure water flow control unit and includes at least one pair of rollers which advance or reverse the spray hose; a connecting pipe which is formed of a flexible hollow pipe and has one end connected to the hose transfer unit and through which the spray hose can move; and a hand guide gun which is a tubular member connected to the other end of the connecting pipe and through which the spray hose can move, a high-pressure water control trigger which controls the operation of the high-pressure water flow control unit is detachably installed, and a hose transfer control switch which controls the operation of the hose transfer unit is detachably installed.

Description

Pipe cleaning equipment using water jet

The present invention relates to a pipe cleaning device, and more specifically, to a pipe cleaning device using a water jet.

A heat exchanger is a device that exchanges heat between two fluids of different temperatures. Heat exchangers are widely used in air conditioners, coolers, refrigerators, power generation facilities, etc. A typical form of a heat exchanger may be a structure in which a number of pipes are arranged in a bundled form. As the fluid for heat exchange flows inside the pipes constituting the heat exchanger, scale-like contaminants are generated on the inner walls of the pipes. In order to maintain smooth heat exchange performance, it is necessary to periodically clean the inside of the pipes constituting the heat exchanger. Generally, scale can be removed by spraying high-pressure water into the inside of the pipes constituting the heat exchanger to clean the inside of the pipes constituting the heat exchanger. However, conventional pipe cleaning devices are configured to work while holding a hose sprayed at high pressure with a person's hand. When using such conventional pipe cleaning devices, there is a problem that the worker may be injured by the sprayed high-pressure water. In addition, since the foot valve switch that controls the high-pressure water in the conventional pipe cleaning device is separated from the worker, multiple workers must work in groups, which reduces workability.

Meanwhile, among conventional pipe cleaning devices, mechanized cleaning devices can reduce the risk of injury to workers, but they have the problem that the installation time for the device for pipe cleaning is long and the introduction cost of the equipment is high.

001 KR 10-2023-0023614 A (2023.02.17)

The purpose of the present invention is to solve the problems described above, and to provide a pipe cleaning device that can be operated by one worker, prevents injury to the worker, and is convenient to use.

In order to achieve the above object, the pipe cleaning device using a water jet according to the present invention comprises: a high-pressure water flow control unit that receives high-pressure water from the outside and outputs it to a spray hose having a nozzle at the tip, or blocks the high-pressure water from being output to the spray hose and bypasses it;

A hose transfer unit installed at a location spaced apart from the high-pressure water flow control unit and including at least one pair of rollers for moving the spray hose forward or backward;

A connecting tube having one end connected to the above hose transfer section and configured as a flexible hollow tube through which the injection hose can move;

The invention is characterized by including a hand guide gun, which is a tubular member connected to the other end of the above connecting pipe, through which the spray hose can movably pass, a high-pressure water control trigger for controlling the operation of the high-pressure water flow control unit is detachably installed, and a hose transport control switch for controlling the operation of the hose transport unit is detachably installed.

The high-pressure water control trigger is arranged in a direction perpendicular to the length direction of the hand guide gun, and the high-pressure water control trigger can be configured to control a valve of the high-pressure water flow control unit by air pressure.

The above hose transport control switch is configured such that the forward switch and the reverse switch are arranged in parallel and spaced apart from each other, and the hose transport control switch can be configured to control the rotation direction of an air motor that rotates the roller forward or reversely by air pressure.

The hand guide gun may include a pipe alignment contact tip having a funnel-shaped inner surface and detachably coupled to the tip end of the hand guide gun.

The above hand guide gun may be provided with a nozzle immersion detection unit that detects a state in which the nozzle is immersed into the interior of the hand guide gun.

The above hand guide gun may be provided with a backflow water discharge portion that is opened in a direction perpendicular to the longitudinal direction of the hand guide gun so that when high-pressure water sprayed from the nozzle flows back toward the hand guide gun, the backflowed water is discharged to the outside of the hand guide gun.

The above hose conveying unit may include a roller spacing adjustment device for adjusting the spacing between a pair of rollers.

The hand guide gun may include a hose catcher installed inside the gun to limit the maximum rearward position of the nozzle.

Meanwhile, a pipe cleaning device using a water jet according to another embodiment of the present invention comprises: a high-pressure water flow control unit that receives high-pressure water from the outside and outputs it to a spray hose having a nozzle at the tip, or blocks the high-pressure water from being output to the spray hose and bypasses it;

A hose transfer unit installed at a location spaced apart from the high-pressure water flow control unit and including at least one pair of rollers for moving the spray hose forward or backward;

A connecting tube having one end connected to the above hose transfer section and configured as a flexible hollow tube through which the injection hose can move;

The invention is characterized in that it includes a hand guide gun, which is a tubular member connected to the other end of the above connecting pipe, through which the injection hose can movably pass, and in which a hose transport control switch for controlling the operation of the high-pressure water flow control unit and controlling the operation of the hose transport unit is detachably installed.

The pipe cleaning device using a water jet according to the present invention provides the effect of allowing one person to easily perform pipe cleaning work by providing a high-pressure water control trigger and a hose transfer control switch on a hand guide gun that a user holds and uses by hand.

In addition, the pipe cleaning device according to the present invention has the advantage of convenient maintenance and repair of the device since it is possible to control hose transport and high-pressure water spray by pneumatic means.

In addition, the pipe cleaning device according to the present invention can contribute to ensuring user safety since it has a structure in which a user can easily detect that the spray nozzle is immersed in the hand guide gun.

In addition, the pipe cleaning device according to the present invention has an advantage in that it can be used flexibly even in environments where hoses of different diameters are used, since it is equipped with a device for adjusting the gap between rollers constituting the hose transport section.

FIG. 1 is a perspective view of a pipe cleaning device according to an embodiment of the present invention.
Figure 2 is a drawing showing the structure of the hose transfer unit illustrated in Figure 1.
Figure 3 is a drawing showing the structure of the high-pressure water flow control unit illustrated in Figure 1.
Figure 4 is a cross-sectional view taken along line Ⅳ-Ⅳ shown in Figure 3.
Figure 5 is a drawing showing the detailed structure of the hose transfer section.
Figure 6 is a drawing of the hose transfer unit viewed from another direction.
Figure 7 is a cross-sectional view taken along line VII-VII shown in Figure 6.
Figure 8 is a drawing showing the detailed structure of the hand guide gun.
Figure 9 is a cross-sectional view taken along line Ⅸ-Ⅸ of Figure 8.
Figure 10 is a cross-sectional view taken along line Ⅹ-Ⅹ shown in Figure 8.
Figure 11 is a cross-sectional view taken along line ⅩⅠ-ⅩⅠ shown in Figure 8.
Figure 12 is a pneumatic circuit diagram applied to a pipe cleaning device according to an embodiment of the present invention.
FIG. 13 is a pneumatic circuit diagram applied to a pipe cleaning device according to another embodiment of the present invention.

The present invention may have various modifications and may take various forms, and thus embodiments of the present invention will be described in detail herein. However, this is not intended to limit the present invention to a specific disclosed form, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

The above terms are used for the purpose of distinguishing one component from another. The terms used in this application are used only to describe specific embodiments and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise.

It should be understood that the terms “comprises,” “has,” or “consists of” in the present invention are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries, such as those defined in common dictionaries, should be interpreted as having a meaning consistent with the contextual meaning they have in the relevant art, and shall not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in more detail.

FIG. 1 is a perspective view of a pipe cleaning device according to an embodiment of the present invention. FIG. 2 is a drawing showing the structure of a hose transfer unit illustrated in FIG. 1. FIG. 3 is a drawing showing the structure of a high-pressure water flow control unit illustrated in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3. FIG. 5 is a drawing showing a detailed structure of a hose transfer unit. FIG. 6 is a drawing showing the hose transfer unit seen from another direction. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6. FIG. 8 is a drawing showing a detailed structure of a hand guide gun. FIG. 9 is a cross-sectional view (longitudinal) taken along line IX-IX of FIG. 8. FIG. 10 is a cross-sectional view taken along line X-X of FIG. 8. FIG. 11 is a cross-sectional view taken along line XI-XI of FIG. 8. FIG. 12 is a pneumatic circuit diagram applied to an embodiment of the present invention. Fig. 13 is a pneumatic circuit diagram applied to another embodiment of the present invention. The flow of compressed air is indicated by arrows in Figs. 12 and 13.

Referring to FIGS. 1 to 12, a pipe cleaning device (10, hereinafter referred to as “pipe cleaning device”) using a water jet according to the present invention is a device that cleans foreign substances on the inner surface of a pipe (100) applied to a heat exchanger, etc.

The above pipe cleaning device (10) includes a spray hose (20), a high-pressure water flow control unit (30), a hose transfer unit (40), a connecting pipe (60), and a hand guide gun (70).

The above-described spray hose (20) is a flexible tubular structure through which high-pressure water flows. A nozzle (22) forming a water jet is provided at the front end of the spray hose (20). A nozzle having a known structure may be employed as the nozzle (22). The rear end of the spray hose (20) is connected to the output side of a high-pressure water flow control unit (30) described later. A hose advance stopper (24) may be installed at the spray hose (20). The hose advance stopper (24) may be installed so as to be caught on a rail receiving box (42) constituting a hose transfer unit (40) described later. The hose advance stopper (24) may be provided to limit the advance distance of the spray hose (22) depending on the length of the pipe (100) to be cleaned. The hose advance stopper (24) may be installed by moving its position.

The high-pressure water flow control unit (30) may be installed in the tumble frame (15). The tumble frame (15) may be composed of, for example, aluminum or a steel structure. The tumble frame (15) may be composed by welding or assembling a plurality of metal plates. The tumble frame (15) serves as a frame to which the components constituting the high-pressure water flow control unit (30) and the hose transfer unit (40) are combined. The tumble frame (15) may be provided with a tumble handle (17) that a person can hold and move by hand.

The high-pressure water flow control unit (30) can supply high-pressure water from the outside and output it to the spray hose (20) described later, or block and bypass the output to the spray hose (20). The spray hose (20) can be configured as a hose that can be bent. It is preferable that the spray hose (20) be configured so that deformation in the thickness direction can be minimized as much as possible so that the high-pressure water can flow safely. The spray hose (20) can be configured to have a sufficient length so that it can flexibly respond to the work situation. For example, the length of the spray hose (20) can be 10 m to 20 m. A nozzle (22) is provided at the tip of the spray hose (20). A nozzle having a known structure can be employed as the nozzle (22). The high-pressure water flow control unit (30) can be equipped with a main opening/closing valve (not shown) that can manually block the high-pressure water supplied from the outside. The high-pressure water flow control unit (30) is provided with a dump valve (36) that switches the flow direction of the high-pressure water. The dump valve (36) is controlled by a first pneumatic motor (34). The first pneumatic motor (34) is provided with an operating shaft (35) that is formed to be retractable by pneumatic pressure. The operating shaft (35) controls the operation of the dump valve (36) by applying pressure to the dump valve (36). Referring to FIG. 4, for example, when the operating shaft (35) does not apply pressure to the dump valve (36), the high-pressure water flow control unit (30) blocks the high-pressure water from being output to the injection hose (20) and bypasses it. When the operating shaft applies pressure to the dump valve (36), the load of the dump valve (36) blocks the bypass path to output the high-pressure water to the injection hose (20). The high-pressure water bypassed in the high-pressure water flow control unit (30) may be configured to be discharged to the outside or returned to a storage tank. The retraction of the operating shaft (35) is controlled by a high-pressure water control trigger (80) provided in the hand guide gun (70) described below.

The hose transfer unit (40) may be installed on the tumble frame (15). The hose transfer unit (40) may be installed at a position spaced apart from the high-pressure water flow control unit (30). The hose transfer unit (40) includes at least one pair of rollers that move the spray hose (20) forward or backward. More specifically, the hose transfer unit (40) may include a roller receiving box (42), a driving roller (46), a second pneumatic motor (47), a driven roller (50), and a roller gap adjustment device.

The roller receiving box (42) may be configured as a box-shaped structure. The roller receiving box (42) may include an openable door (43). The roller receiving box (42) may be detachably fixed to the tumble frame (15) by a screw, a bolt, or the like. The roller receiving box (42) may be provided with an inlet/outlet conduit (44) through which the spray hose (20) may pass. The inlet/outlet conduit (44) is a passage connecting the internal space of the roller receiving box (42) and the external space. The inlet/outlet conduit (44) may be configured in a form that protrudes outward from the external wall of the roller receiving box (42).

The above driving roller (46) is rotatably installed in the roller receiving box (42). The driving roller (46) is driven by a second pneumatic motor (47). The second pneumatic motor (47) can be fixed to the roller receiving box (42). The rotational axis of the second pneumatic motor (47) and the rotational axis of the driving roller (46) can be formed on the same axis. The second pneumatic motor (47) can rotate forward or reverse. A transmission can be installed between the second pneumatic motor (47) and the driving roller (46). The transmission can perform the function of controlling torque by generating a difference in the rotational speed of the output shaft of the second pneumatic motor (47) and the driving roller (46).

The driven roller (50) is rotatably installed in the roller receiving box (42). The central axis (55) of the driven roller (50) and the central axis of the driving roller (46) are arranged parallel to each other. The driven roller (50) can be connected to the driving roller (46) via a gear. The rotation direction of the driving roller (46) and the rotation direction of the driven roller (50) are opposite to each other. The spray hose (20) can move forward or backward while being pressurized by the driving roller (46) and the driven roller (50). The central axis (55) of the driven roller (50) is installed so as to be adjusted within a predetermined distance with respect to the central axis (55) of the driving roller (46). For example, the position of the central axis (55) of the driven roller (50) can be adjusted up and down. More specifically, in order for the central axis (55) of the driven roller (50) to move up and down, a slot-shaped driven shaft hole (45) is provided on one side wall of the roller receiving box (42) in the up and down direction. The central axis (55) of the driven roller (50) can be detachably coupled to the driven roller (50). For example, the central axis (55) of the driven roller (50) can be screw-coupled to the driven roller (50). A clamping lever (551) can be provided at an outer end of the central axis (55) of the driven roller (50).

The central axis (55) of the driven roller (50) is coupled to the driven roller (50) by passing through a movable plate (52) that is installed so as to be slidable in a direction parallel to the ground with respect to the roller receiving box (42). The central axis (55) of the driven roller (50) can be screw-connected to the center of the driven roller (50). The central axis (55) of the driven roller (50) can be maintained in a non-rotating state. The driven roller (50) is installed so as to be rotatable based on the central axis (55) of the driven roller (50). For example, the driven roller (50) can be installed so as to be rotatable via a bearing and the central axis (55) of the driven roller (50).

A rotary plate (521) is provided that is rotatably installed on the above-described movable plate (522). The rotary plate (521) may be configured in the shape of a disk. The rotary plate (521) may be provided with a plurality of shaft through-holes (523) spaced apart along the circumference. A ball lever (525) is provided to rotate the rotary plate (521). By applying an external force to the ball lever (525), the rotary plate (521) rotates, and the movable plate (52) can move in a direction parallel to the ground. As the movable plate (52) slides, the central axis (55) of the driven roller (50) can be raised and lowered along the driven shaft hole (45) in a direction perpendicular to the ground. More specifically, when the central axis (55) of the driven roller (50) is not clamped, and more specifically, when the center of the movable plate (52) and the driven roller (50) are not in close contact with the roller receiving box (42), the rotary plate (521) is rotated using the ball lever (525), and the movable plate (52) slides, the central axis (55) of the driven roller (50) can move up and down along the driven shaft hole (45). Accordingly, the gap between the driven roller (50) and the driving roller (46) can be adjusted. When the clamping lever (551) is tightened so that the center of the driven roller (50) and the movable plate (52) are in close contact with the roller receiving box (42), i.e., in a clamped state, the movable plate (52) cannot move, so the central axis (55) of the driven roller (50) is restricted from moving in the left-right direction of the driven shaft hole (45), and the rotary plate (521) cannot rotate either. Accordingly, the position of the central axis (55) of the driven roller (50) is fixed. The central axis (55) of the driven roller (50) is coupled to the driven roller (50) by passing through the shaft through-hole (523) and the driven shaft hole (45).

In this way, the gap between the driven roller (50) and the driving roller (46) can be adjusted by moving the central axis (55) of the driven roller (50) up and down. By adjusting the gap between the driven roller (50) and the driving roller (46), it is possible to flexibly respond to cases where the diameter of the spray hose (20) is different. That is, the hose transport unit (40) can be equipped with a roller gap adjustment device that can adjust the gap between the pair of rollers.

The above driving roller (46) and the driven roller (50) may be provided one each, but in some cases, the driven rollers (50) may be provided three. In this case, two pairs of rollers may be arranged in series along the direction of travel of the spray hose (20). The driving roller (40) and the driven roller (50) may be connected via a gear so that the remaining driven roller (50) is rotated by one driving roller (46).

The above connecting pipe (60) is configured as a flexible hollow pipe. One end of the connecting pipe (60) is connected to the hose transfer part (40). More specifically, one end of the connecting pipe (60) can be connected to the outlet of the inlet/outlet pipe (44). The other end of the connecting pipe (60) is connected to the rear end of the hand guide gun (70) described later. The connecting pipe (60) is configured so that the spray hose (20) can move through it. That is, the spray hose (20) can move forward or backward through the internal space of the connecting pipe (60).

The above hand guide gun (70) is a tubular member connected to the other end of the connecting pipe (60). The spray hose (20) movably passes through the internal space of the hand guide gun (70). The hand guide gun (70) includes a handling body (71), a high-pressure water control trigger (80), a hose transfer control switch (90), a pipe alignment contact tip (721), and a hose catcher (75).

The above handling body (71) is a tubular member. The above handling body (71) may be composed of a first body (72), a second body (73), and a backflow discharge portion (74).

The first body (72) is disposed at the front end of the handling body (71). The second body (73) is disposed at the rear end of the handling body (71). A backflow water discharge unit (74) may be disposed between the first body (72) and the second body (73). The backflow water discharge unit (74) may be configured as a “T” shaped pipe. The first body (72) and the backflow water discharge unit (74), and the second body (73) and the backflow water discharge unit (74) may be combined with a male screw and female screw joint structure. The backflow water discharge unit (74) is provided to discharge the backflowed water to the outside of the hand guide gun (70) when the high-pressure water sprayed from the nozzle (22) flows back toward the hand guide gun (70). The above-mentioned backflow discharge portion (74) is opened in a direction perpendicular to the longitudinal direction of the hand guide gun (70). The above-mentioned backflow discharge portion (74) may include a flexible discharge hose (741). It is preferable that the discharge hose (741) be maintained in contact with the ground during operation.

A hose catcher (75) may be installed between the above-described backflow discharge portion (74) and the second body (73). The hose catcher (75) is a member that restricts the nozzle (22) installed at the tip of the spray hose (20) so that it cannot move backward any further within the handling body (71). Referring to FIG. 10, the hose catcher (75) has a “U” shaped passage that is sized so that the spray hose (20) can pass through but the nozzle (22) cannot. The nozzle (22) can no longer move backward due to the hose catcher (75). That is, the hose catcher (75) is installed inside the hand guide gun (70) and restricts the maximum backward position of the nozzle (22). Therefore, the spray hose (20) is prevented from being detached from the rear end of the handling body (71). The first body (72) and the second body (73) may each be provided with a traction eye (76) for installing a strap (not shown). The traction eye (76) may be detachably installed on the outer surface of the first body (72) or the second body (73). The traction eye (76) may be secured by a bolt or the like in a form that wraps around the upper and lower parts of the first body (72) or the second body (73). By connecting a strap to the traction eye (76), the pipe cleaning work can be performed while the hand guide gun (70) is carried on the worker's shoulder.

A pipe alignment contact tip (721) may be installed at the tip end of the first body (72). The pipe alignment contact tip (721) may be detachably installed on the first body (72). The pipe alignment contact tip (721) has an inner circumferential surface in a funnel shape (723). That is, the pipe alignment contact tip (721) has a structure in which the inner diameter size becomes smaller as it gets farther away from the tip end of the pipe alignment contact tip (721). The pipe alignment contact tip (721) may be fixed to the first body (72) by a fixing bolt.

The first body (72) may be provided with a nozzle immersion detection unit (77). The nozzle immersion detection unit (77) detects a state in which the nozzle (22) is immersed into the hand guide gun (70), i.e., the inside of the first body (72), and generates a whistling sound. The nozzle immersion detection unit (77) includes a plurality of slot holes (78) that penetrate the inside and the outside along the circumference of the first body (72). A cylindrical resonance tube (79) having an inner surface spaced apart from the first body (72) is provided on the outside of the slot holes (78). The front of the resonance tube (79) may have an open structure, and the rear of the resonance tube (79) may have a closed structure. When the nozzle (22) is immersed into the interior of the first body (72) and high-pressure water is sprayed, a vibration sound similar to a whistling sound is generated by colliding with the resonance tube (79) through the slot hole (78). Accordingly, the operator can detect that the nozzle (22) is immersed into the hand guide gun (70) and perform an operation to stop the high-pressure water spray.

The high pressure water control trigger (80) may be installed in the first body (72). The high pressure water control trigger (80) controls the operation of the high pressure water flow control unit (30). The high pressure water control trigger (80) may be detachably installed in the first body (72). The high pressure water control trigger (80) may be detachably installed in the first body (72) by a bolt. The high pressure water control trigger (80) includes a pneumatic on/off switch that operates the first pneumatic motor (34) by a user's grip force. By pressurizing the high pressure water control trigger (80), the operating shaft (35) of the first pneumatic motor (34) pressurizes the dump valve (36) so that the high pressure water is output to the spray hose (20). The high pressure water control trigger (80) has a trigger having elastic restoring force. By removing the external force applied to the high-pressure water control trigger (80), the pneumatic on/off switch is turned off, and the dump valve (36) is blocked from outputting high-pressure water to the injection hose (20) and is bypassed.

The high-pressure water control trigger (80) is arranged in a direction perpendicular to the length direction of the hand guide gun (70). As described above, the high-pressure water control trigger (80) controls the dump valve (36) of the high-pressure water flow control unit (30) by operating the first pneumatic motor (34) by air pressure. The high-pressure water control trigger (80) and the first pneumatic motor (34) are connected by a pair of pneumatic lines (95). Referring to FIG. 12, it is possible to understand the pneumatic circuit that controls the operating shaft (35) of the first pneumatic motor (34) to retract by the high-pressure water control trigger (80). That is, the compressed air supplied from the outside is distributed at branch point a and supplied to the first pneumatic motor (34). In addition, the compressed air distributed at branch point a is supplied to the high-pressure water control trigger (80) through branch point b. When an external force is applied to the high-pressure water control trigger (80) to convert it into an operating state, the compressed air operates the first pneumatic motor (34) to advance the operating shaft (35). When the operating shaft (35) advances, the high-pressure water flows into the spray hose (20). When the external force applied to the high-pressure water control trigger (80) is removed, the operating shaft (35) of the first pneumatic motor (34) moves backward. When the operating shaft (35) moves backward, the high-pressure water flows into the bypass path.

The hose transport control switch (90) can be detachably installed on the second body (73). The hose transport control switch (90) can be detachably installed on the second body (73) by a plurality of bolts. The hose transport control switch (90) has two pneumatic on/off switches. The hose transport control switch (90) and the second pneumatic motor (47) are connected by two pairs of pneumatic lines (95). One pair of pneumatic lines (95) is provided for forward rotation of the second pneumatic motor (47), and the other pair of pneumatic lines (95) is provided for reverse rotation of the second pneumatic motor (47). The hose transport control switch (90) controls the operation of the second pneumatic motor (47) constituting the hose transport section (40). One of the hose transport control switches (90) causes the second pneumatic motor (47) to rotate in the forward direction. The remaining hose transport control switches (90) rotate the second pneumatic motor (47) in reverse. Accordingly, by selectively opening and closing the hose transport control switches (90), the second pneumatic motor (47) rotates the driving roller (46) to move the spray hose (20) forward or backward. When all of the hose transport control switches (90) are turned off, the spray hose (20) remains stopped. The spray hose (20) can move forward or backward through the internal space of the connecting pipe (60) and the hand guide gun (70). High-pressure water is sprayed through the nozzle (22) provided at the tip of the spray hose (20). The high-pressure water sprayed through the nozzle (22) forms a water jet to remove foreign substances generated on the inner wall of the pipe (100).

The hose transport control switch (90) may be arranged in parallel with the forward switch and the reverse switch spaced apart from each other. The hose transport control switch (90) is configured to control the rotation direction of the second pneumatic motor (47) that rotates the driving roller (46) forward or backward by air pressure. Referring to FIG. 12, the pneumatic circuit between the hose transport control switch (90) and the second pneumatic motor (47) can be understood. That is, the compressed air supplied from the outside is distributed at branch point a and supplied to the second pneumatic motor (47). In addition, the compressed air distributed at branch point a is supplied to the hose transport control switch (90) through branch point b. When an external force is applied to any one of the hose transport control switches (90) to convert it to an operating state, the compressed air causes the second pneumatic motor (47) to rotate forward. Meanwhile, when an external force is applied to another one of the hose transport control switches (90) to switch to an operating state, the compressed air causes the second pneumatic motor (47) to rotate in reverse.

An insulating cover (711) may be installed to cover the outer surface of the first body (72) and the second body (73). The insulating cover (711) may be made of, for example, silicone resin. The insulating cover (711) prevents burns from occurring on the body of the worker when the temperature of the surface of the hand guide gun (70) rises due to frictional heat generated from the spray hose (20).

The pressurizing direction of the switch of the high-pressure water control trigger (80) and the pressurizing direction of the hose transport control switch (90) can be arranged perpendicular to each other. Generally, the high-pressure water control trigger (80) can be controlled with the left hand, and the hose transport control switch (90) can be controlled with the right hand. In some cases, the high-pressure water control trigger (80) can be controlled with the right hand, and the hose transport control switch (90) can be controlled with the left hand.

Hereinafter, the operational effect of the pipe cleaning device (10) including the components described above will be described in detail by taking as an example the process of cleaning a pipe (100) for a heat exchanger using the pipe cleaning device (10).

First, the worker connects one end of the spray hose (20) to the outlet side of the high-pressure water flow control unit (30). Then, the other end of the spray hose (20) passes between the drive roller (46) and the driven roller (50) along the inlet/outlet conduit (44) constituting the hose transfer unit (40). In this process, the central axis (55) of the driven roller (50) is adjusted so that the spray hose (20) is pressurized to an appropriate pressure by the drive roller (46) and the driven roller (50). Now, the front end of the spray hose (20) passes through the connecting pipe (60) and the second body (73) constituting the hand guide gun (70). Then, a hose catcher (75) is installed at a location where the backflow water discharge unit (74) and the second body (73) are connected. The backflow discharge part (74) and the second body (73) and the first body (72) are combined. Then, the tip of the spray hose (20) is made to pass through the first body (72) and the pipe alignment contact tip (721) and slightly protrude to the tip of the hand guide gun (70). A nozzle (22) is installed at the tip of the spray hose (20). The high-pressure water control trigger (80) and the hose transport control switch (90) are combined at appropriate positions on the hand guide gun (70). The high-pressure water control trigger (80) and the first pneumatic motor (34) constituting the high-pressure water flow control part (30) are configured to be connected to each other by an pneumatic line (95). Compressed air input from the outside can flow through the pneumatic line (95). The compressed air supplied from the outside can be distributed to each pneumatic line (95) through a distributor.

A compressed air passage is also formed between the above hose transfer control switch (90) and the second pneumatic motor (47) by the pneumatic line (95).

Now, connect the high-pressure water supply hose so that high-pressure water can be input from the outside to the input side of the high-pressure water flow control unit (30) and open the main opening/closing valve. Accordingly, high-pressure water is input to the high-pressure water flow control unit (30).

The worker approaches the pipe (100) to be cleaned while holding the high-pressure water control trigger (80) with one hand and the vicinity of the hose transport control switch (90) with the other hand while carrying the hand guide gun (70) on his shoulder by attaching the strap to the towing eye (76). The pipe alignment contact tip (721) is brought into contact with the end of the pipe (100). The pipe alignment contact tip (721) has an inner surface in a funnel shape (723) and comes into contact with the outer surface of the end of the pipe (100). Then, the center of the pipe (100) and the center of the pipe alignment contact tip (721) are naturally aligned. Now, the hose transport control switch (90) is operated to control the tip of the spray hose (20) with the nozzle (22) installed to enter the inside of the pipe (100). Typically, the length of the pipe (100) for a heat exchanger can be about 6 m. The worker advances or reverses the nozzle (22) and simultaneously pressurizes the high-pressure water control trigger (80) to cause the first pneumatic motor (34) to drive the dump valve (36), thereby spraying high-pressure water in the form of a water jet into the inside of the pipe (100) through the nozzle (22). The sprayed water jet removes foreign substances generated on the inner wall of the pipe (100). While washing the pipe (100), the worker controls the hose transport control switch (90) to cause the spray hose (20) to advance or reverse. During the process of the spray hose (20) moving backward, if the nozzle (22) is immersed into the inside of the hand guide gun (70), the nozzle immersion detection unit (77) generates a whistling sound due to the high-pressure water sprayed from the nozzle (22). The worker removes the pressure applied to the high-pressure water control trigger (80). Accordingly, the high-pressure water spray is stopped. And when the nozzle (22) reaches the hose catcher (75), the nozzle (22) is caught on the hose catcher (75) and cannot move backward any further. The operator removes the pressure applied to the hose transfer control switch (90) to prevent the spray hose (20) from moving backward any further. By repeating this process, a plurality of pipes can be effectively cleaned. In the present embodiment, one spray hose is configured to pass through the hand guide gun, but a modified example may be configured to allow a plurality of spray hoses to pass through the hand guide gun. In this process, the user can move the spray hose forward or backward by power without directly contacting the nozzle where the water jet is generated, and the left-right and up-down positional movement is possible by the operator's power using the hand guide gun, so the efficiency of the pipe cleaning task is improved. In addition, since direct contact between the nozzle and the operator is blocked by the hand guide gun, the risk of the operator being injured by high-pressure water can be eliminated.

As described above, the pipe cleaning device using a water jet according to the present invention provides the effect of allowing one person to easily perform pipe cleaning work by providing a high-pressure water control trigger and a hose transfer control switch on a hand guide gun that a user holds and uses by hand.

In addition, the pipe cleaning device according to the present invention has the advantage of convenient maintenance and repair of the device since it is possible to control hose transport and high-pressure water spray by pneumatic pressure.

In addition, the pipe cleaning device according to the present invention can contribute to ensuring user safety since it has a structure in which a user can easily detect that the spray nozzle is immersed in the hand guide gun.

In addition, the pipe cleaning device according to the present invention has an advantage in that it can be used flexibly even in environments where hoses of different diameters are used, since it is equipped with a device for adjusting the gap between rollers constituting the hose transport section.

Meanwhile, a pipe cleaning device according to another embodiment of the present invention may configure a pneumatic circuit to integrate the function of the high-pressure water control trigger (80) into the hose transport control switch (90). Referring to the pneumatic circuit diagram of FIG. 13, the hose transport control switch (90) can simultaneously control the first pneumatic motor (34) and the second pneumatic motor (47). That is, compressed air supplied from the outside is distributed at branch point a and supplied to the first pneumatic motor (34) and the second pneumatic motor (47), respectively. In addition, the compressed air distributed at branch point a is supplied to the hose transport control switch (90) through branch point b. When an external force is applied to any one of the hose transport control switches (90) to convert it into an operating state, the compressed air operates the first pneumatic motor (34) to advance the operating shaft (35) and rotates the second pneumatic motor (47) in the forward direction. Meanwhile, when an external force is applied to another one of the hose transport control switches (90) to be switched to an operating state, the compressed air operates the first pneumatic motor (34) to advance the operating shaft (35) and rotates the second pneumatic motor (47) in reverse. That is, when an external force is applied to the hose transport control switch (90), the high-pressure water flow control unit (30) causes high-pressure water to be output to the spray hose (20), and the hose transport unit (40) causes the hose to advance. Meanwhile, when an external force is applied to the hose transport control switch (90), the high-pressure water flow control unit (30) causes high-pressure water to be output to the spray hose (20), and the hose transport unit (40) causes the hose to advance. In this way, the pneumatic circuit can be configured so that the hose transport control switch (90) can simultaneously control the first pneumatic motor (34) and the second pneumatic motor (47).

While the present invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims below.

10: Pipe cleaning device
15: Tumble Frame
17: Tumble Handle
20 : Injection hose
22 : Nozzle
24: Hose forward stopper
30: High pressure water flow control unit
34: 1st pneumatic motor
35 : Working axis
36 : Dump valve
40 : Hose transfer part
42: Roller receiving box
43 : Door
44 : Entrance and exit passage
45: Jongdong shaft
46 : Drive roller
47: 2nd pneumatic motor
50 : Drive roller
52 : Movable plate
521 : Turntable
523 : Axial through hole
525 : Ball lever
55: Center axis of the driven roller
551 : Clamping lever
60 : Connector
70 : Hand Guide Gun
71 : Handling body
711 : Insulation cover
72: First body
721 : Pipe Alignment Contact Tip
723: Funnel shape
73: Second body
74: Backflow discharge section
741 : Exhaust hose
75 : Horse catcher
76 : Towing Eye
77: Nozzle immersion detection unit
78 : Slot machine
79 : Sound box
80 : High pressure water control trigger
90 : Hose transfer control switch
95 : Pneumatic line
100 : Plumbing

Claims (9)

A high-pressure water flow control unit that receives high-pressure water from the outside and outputs it to a spray hose having a nozzle at the tip, or blocks the high-pressure water from being output to the spray hose and bypasses it;
A hose transfer unit installed at a location spaced apart from the high-pressure water flow control unit and including at least one pair of rollers for moving the spray hose forward or backward;
A connecting tube having one end connected to the above hose transfer section and configured as a flexible hollow tube through which the injection hose can move;
A hand guide gun, comprising: a tubular member connected to the other end of the above connecting pipe, through which the spray hose can movably pass, a high-pressure water control trigger for controlling the operation of the high-pressure water flow control unit is detachably installed, and a hose transport control switch for controlling the operation of the hose transport unit is detachably installed;
The above hand guide gun is provided with a nozzle immersion detection unit that detects a state in which the nozzle is immersed into the interior of the hand guide gun.
The nozzle immersion detection unit detects a state in which the nozzle is immersed into the inside of the hand guide gun and generates a whistling sound, and the nozzle immersion detection unit includes a plurality of slot holes penetrating the inside and the outside along the circumference of the first body constituting the hand guide gun.
A pipe cleaning device using a water jet, characterized in that a cylindrical resonance chamber having an inner surface spaced apart from the first body is provided on the outer side of the above slot hole. In the first paragraph,
A pipe cleaning device using a water jet, characterized in that the high-pressure water control trigger is arranged in a direction perpendicular to the length direction of the hand guide gun, and the high-pressure water control trigger is configured to control the valve of the high-pressure water flow control unit by air pressure. In the first paragraph,
A pipe cleaning device using a water jet, characterized in that the hose transport control switch is arranged in a parallel manner with the forward switch and the reverse switch spaced apart from each other, and the hose transport control switch is configured to control the rotation direction of an air motor that rotates the roller forward or reverse by air pressure. In the first paragraph,
A pipe cleaning device using a water jet, characterized by including a pipe alignment contact tip having a funnel-shaped inner surface and detachably connected to the tip of the hand guide gun. delete In the first paragraph,
A pipe cleaning device using a water jet, characterized in that the hand guide gun has a backflow water discharge portion that is opened in a direction perpendicular to the length direction of the hand guide gun so that when high-pressure water sprayed from the nozzle flows back toward the hand guide gun, the backflowed water is discharged to the outside of the hand guide gun. In the first paragraph,
A pipe cleaning device using a water jet, characterized in that the hose transport unit includes a roller gap adjustment device for adjusting the gap between a pair of rollers. In the first paragraph,
A pipe cleaning device using a water jet, characterized in that it includes a hose catcher installed inside the hand guide gun to limit the maximum backward position of the nozzle. A high-pressure water flow control unit that receives high-pressure water from the outside and outputs it to a spray hose having a nozzle at the tip, or blocks the high-pressure water from being output to the spray hose and bypasses it;
A hose transfer unit installed at a location spaced apart from the high-pressure water flow control unit and including at least one pair of rollers for moving the spray hose forward or backward;
A connecting tube having one end connected to the above hose transfer section and configured as a flexible hollow tube through which the injection hose can move;
A hand guide gun, which comprises a tubular member connected to the other end of the above connecting pipe, through which the injection hose can movably pass, and a hose transport control switch that controls the operation of the high-pressure water flow control unit and controls the operation of the hose transport unit, is detachably installed;
The above hand guide gun is provided with a nozzle immersion detection unit that detects a state in which the nozzle is immersed into the interior of the hand guide gun.
The nozzle immersion detection unit detects a state in which the nozzle is immersed into the inside of the hand guide gun and generates a whistling sound, and the nozzle immersion detection unit includes a plurality of slot holes penetrating the inside and the outside along the circumference of the first body constituting the hand guide gun.
A pipe cleaning device using a water jet, characterized in that a cylindrical resonance chamber having an inner surface spaced apart from the first body is provided on the outer side of the above slot hole.

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