Heat exchanger tube nest cleaning tool and system

Abstract

The utility model provides a heat exchanger tube nest cleaning tool and system, and relates to the technical field of tube nest cleaning. The heat exchanger tube nest cleaning tool comprises an air inlet pipe, a first gradual change pipe and a second gradual change pipe, the outer diameter of the first gradual change pipe is gradually reduced from the first end to the second end of the first gradual change pipe, the first end of the first gradual change pipe is connected with the air inlet pipe, and the outer diameter of the second gradual change pipe is gradually reduced from the first end to the second end of the second gradual change pipe. The outer diameter of the second end of the second gradually-changing pipe is smaller than that of the second end of the first gradually-changing pipe, and the second gradually-changing pipe can be connected with the air inlet pipe. According to the technical scheme, the tube nests with different tube diameters can be cleaned, so that the blowing effect is improved, and the phenomenon that the end of the blowing pipeline is unstable and shakes is avoided.

Description

Technical Field

[0001] This disclosure relates to the field of tube cleaning technology, and in particular to a heat exchanger tube cleaning tool and system. Background Technology

[0002] Shell and tube heat exchangers are common heat exchange devices widely used in various industries such as chemical, petroleum, and food processing. These heat exchangers mainly consist of a series of parallel pipes, called "tubes." One fluid typically flows inside the tubes, while another fluid flows outside; the two fluids exchange heat through the tube walls.

[0003] During the use and maintenance of heat exchangers, purging and cleaning operations are required. During the purging process, the air blower is usually held directly in front of the heat exchanger tubes.

[0004] However, different types of heat exchanger tubes have different diameters. If the diameter of the blower duct is larger than that of the tubes, the airflow will be uneven and the purging effect will be limited. If the diameter of the blower duct is smaller than that of the tubes, although the end of the blower duct can extend into the tubes, the large gap between them will cause the high-speed airflow to generate strong turbulence in the larger tube space after being ejected through the narrow blower duct. This turbulence will not only disperse the airflow and reduce the cleaning effect, but also cause instability at the end of the blower duct due to the reaction force of the airflow, resulting in swaying. Utility Model Content

[0005] The purpose of this disclosure is to provide a heat exchanger tube cleaning tool and system that can clean tubes of different diameters, thereby improving the purging effect and preventing instability and shaking at the ends of the blowing pipes.

[0006] To address the aforementioned technical problems, the present disclosure provides the following technical solutions:

[0007] The first aspect of this disclosure provides a heat exchanger tube cleaning tool, comprising:

[0008] Intake pipe;

[0009] The first tapered tube has an outer diameter that gradually decreases from its first end to its second end, and the first end of the first tapered tube is connected to the intake pipe.

[0010] The second gradient tube has an outer diameter that gradually decreases from its first end to its second end. The outer diameter of the second end of the second gradient tube is smaller than the outer diameter of the second end of the first gradient tube. The second gradient tube can be connected to the intake pipe.

[0011] In some modified embodiments of the first aspect of this disclosure, the first end of the first gradient tube is detachably connected to the intake pipe, and the first end of the second gradient tube is detachably connected to the intake pipe.

[0012] In some modified embodiments of the first aspect of this disclosure, the first end of the second gradient tube is detachably connected to the second end of the first gradient tube.

[0013] In some modified embodiments of the first aspect of this disclosure, it further includes:

[0014] The first nozzle has one end connected to the second end of the first gradient tube, and the other end of the first nozzle is threadedly connected to the first end of the second gradient tube.

[0015] The second nozzle is connected to the second end of the second gradient tube.

[0016] In some modified embodiments of the first aspect of this disclosure, the inner diameter of the second end of the second tapered tube is smaller than the inner diameter of the second end of the first tapered tube.

[0017] In some modified embodiments of the first aspect of this disclosure, the intake pipe includes an intake rigid pipe and an intake flexible pipe, the intake rigid pipe being connected to the first end of the first tapered pipe, and the intake flexible pipe being connected to the intake rigid pipe.

[0018] The intake hard pipe is made of rigid material, while the intake soft pipe is made of flexible material.

[0019] In some modified embodiments of the first aspect of this disclosure, it further includes:

[0020] The handle is fixedly connected to the intake rigid pipe;

[0021] The hose reel has part of the intake hose wound on it.

[0022] In some modified embodiments of the first aspect of this disclosure, the handle includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod being parallel to each other, and one end of the first connecting rod and the second connecting rod being fixedly connected to the intake hard pipe.

[0023] In some modified embodiments of the first aspect of this disclosure, it further includes:

[0024] The control valve is installed on the intake pipe and controls the flow rate of the intake pipe.

[0025] A second aspect of this disclosure provides a heat exchanger tube cleaning system, including the aforementioned heat exchanger tube cleaning tool.

[0026] Compared to existing technologies, the heat exchanger tube cleaning tool provided in the first aspect of this disclosure features a first gradient tube. The larger outer diameter end of the first gradient tube contacts the inlet pipe, allowing the smaller outer diameter end of the first gradient tube to extend into heat exchanger tubes of different diameters, concentrating airflow and improving the purging effect. The gradient section of the first gradient tube can also block the end of the heat exchanger tube, preventing instability and swaying at the end of the blowing pipe due to gaps between them. Furthermore, a second gradient tube with an even smaller outer diameter is provided. This second gradient tube can connect to the inlet pipe to replace or connect to the first gradient tube, satisfying the cleaning needs of both larger and smaller diameter heat exchanger tubes. Attached Figure Description

[0027] The above and other objects, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0028] Figure 1 A schematic diagram of a heat exchanger tube cleaning tool is shown.

[0029] Figure 2 A schematic diagram of the connection structure between the second and first gradient tubes of a heat exchanger tube cleaning tool is shown.

[0030] Explanation of icon numbers:

[0031] 1. Intake pipe; 11. Intake rigid pipe; 12. Intake flexible pipe; 2. First gradient pipe; 3. Second gradient pipe; 4. First nozzle; 5. Second nozzle; 6. Control valve; 7. Handle; 71. First connecting rod; 72. Second connecting rod; 8. Tubing reel; 9. Connecting pipe; 10. First clamp; 13. Connecting joint; 14. Second clamp. Detailed Implementation

[0032] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0033] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0034] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0036] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0037] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0039] Throughout the entire process of snamm ammonia stripping urea production, various heat exchangers are required for the high-pressure synthesis and concentration reaction of urea. The high-pressure system mainly includes urea stripping tower, high-pressure ammonium carbamate condenser, medium and low-pressure system decomposition tower, medium and low-pressure condenser, vacuum system surface cooler, process condensate system cooler, lubricating oil system oil cooler, etc.

[0040] Based on different design requirements and process conditions, heat exchangers are divided into U-tube heat exchangers and fixed tube sheet heat exchangers. They are also classified by the contact medium: carbon steel and stainless steel. The high-pressure ammonium carbamate condenser in the high-pressure system is a U-tube heat exchanger. The process medium in this equipment is high-pressure ammonium carbamate solution, which is highly corrosive. During major overhauls, various tests are required on the heat exchanger. Due to the special structure of the U-tube, internal water cannot be drained, directly affecting the test results. Therefore, water blowing is necessary to ensure the accuracy of the tests. Some circulating water heat exchangers are made of carbon steel and require water jet cleaning during overhauls. After cleaning, prolonged exposure to air can easily cause rust and corrosion of the tubes. Therefore, further cleaning is required. Drying operations are necessary to prevent heat exchangers from rusting and corroding. After mechanical water jetting of some heat exchangers, leak checking is required. When using water pressure for leak checking, water accumulation inside the tubes directly interferes with the leak checking process, so the water inside the tubes needs to be blown out. Some heat exchangers are gas heat exchangers, and dust accumulation inside affects the heat exchange efficiency, so purging and cleaning operations are required. After maintenance of some heat exchangers, the tubes need to be cleaned to prevent impurities, debris, etc., from clogging the tubes, thus requiring purging and cleaning of the tubes.

[0041] During the purging and cleaning process, the heat exchanger tubes are generally purged by holding a blower pipe directly in front of them.

[0042] However, different types of heat exchanger tubes have different diameters. If the diameter of the blower duct is larger than that of the tubes, the airflow will be uneven and the purging effect will be limited. If the diameter of the blower duct is smaller than that of the tubes, although the end of the blower duct can extend into the tube, the large gap between the two will cause the high-speed airflow to generate strong turbulence in the larger tube space after being ejected through the narrow blower duct. This turbulence will not only disperse the airflow and reduce the cleaning effect, but also cause instability at the end of the blower duct due to the reaction force of the airflow, resulting in swaying.

[0043] To address the aforementioned technical problems, this disclosure provides a heat exchanger tube cleaning tool and system to clean tubes of different diameters, thereby improving the purging effect and preventing instability and swaying at the ends of the blowing pipes.

[0044] Example 1

[0045] like Figure 1 and Figure 2As shown, a heat exchanger tube cleaning tool includes an inlet pipe 1, a first tapered tube 2, and a second tapered tube 3. The outer diameter of the first tapered tube 2 gradually decreases from its first end to its second end. The first end of the first tapered tube 2 is connected to the inlet pipe 1. The outer diameter of the second tapered tube 3 gradually decreases from its first end to its second end. The outer diameter of the second end of the second tapered tube 3 is smaller than the outer diameter of the second end of the first tapered tube 2. The second tapered tube 3 can be connected to the inlet pipe 1.

[0046] The intake pipe 1 is a conduit used to guide clean gas into the first gradient pipe 2 or the second gradient pipe 3. Its main function is to minimize energy loss while ensuring smooth gas flow. Specifically, the intake pipe 1 can be straight, suitable for situations requiring minimal airflow resistance. The direction of gas flow can also be changed as needed, with the intake pipe 1 designed with bends at different angles such as 90 degrees and 45 degrees. The intake pipe 1 can also be flared, with one end having a larger diameter than the other, typically used in applications requiring a gradual increase or decrease in the airflow cross-section. The intake pipe 1 can also be constricted, the opposite of the flared type, with one end having a smaller diameter than the other, suitable for situations requiring accelerated airflow or the generation of a Venturi effect. The intake pipe 1 can also be corrugated, with a corrugated structure that allows for expansion and contraction, suitable for applications requiring vibration absorption or displacement compensation. The intake pipe 1 can be made of metal, such as steel or aluminum, offering high strength and resistance to high temperatures and pressures, suitable for industrial production environments. The intake pipe 1 can also be a plastic intake pipe 1, which is lightweight, low-cost, and corrosion-resistant, suitable for applications under some non-extreme conditions. The intake pipe 1 can also be a composite material intake pipe 1, combining the advantages of multiple materials, such as carbon fiber reinforced plastic, which is lightweight and high-strength. More specifically, the intake pipe 1 can also be a combined pipe, for example, a combination of a metal pipe and a rubber hose.

[0047] The first gradient tube 2 is a specially designed pipe whose outer diameter gradually decreases from one end to the other. The main purpose of this design is to accommodate tubes or other piping systems of different diameters, ensuring that the cleaning medium (such as air or nitrogen) can smoothly enter and cover the entire interior of the pipe, thereby achieving an effective cleaning effect. The first gradient tube 2 is typically connected to the inlet pipe 1, serving as a transition section between the inlet pipe 1 and the target tube.

[0048] The first gradient tube 2 can have various shapes, the specific choice depending on the application scenario and requirements. The first gradient tube 2 can be a straight gradient type, with a linear change from one end to the other, and the outer diameter gradually decreases. This is the most common shape and suitable for most situations. The first gradient tube 2 can also be a curved gradient type, with the outer diameter changing in a curved shape, which can be a smooth curve or a segmented curve. This shape can reduce airflow resistance and improve the flowability of the cleaning medium. The first gradient tube 2 can be a straight gradient or a stepped gradient type, with the outer diameter changing in a stepped manner, with a distinct step at regular intervals. This shape is suitable for situations requiring segmented adaptation to pipes of different diameters. The first gradient tube 2 can also be a conical gradient type, with the outer diameter changing in a conical shape, similar to a cone. This shape can provide better airflow guidance and distribution.

[0049] The first gradient tube 2 can be a metal gradient tube, a plastic gradient tube, or a composite material gradient tube. Metal gradient tubes, such as those made of steel or aluminum, offer high strength and resistance to high temperatures and pressures, making them suitable for industrial production environments. Plastic gradient tubes are lightweight, low-cost, and corrosion-resistant, making them suitable for applications under non-extreme conditions. Composite material gradient tubes combine the advantages of multiple materials, such as carbon fiber reinforced plastics, and are characterized by their lightweight and high strength, often used in high-performance tools.

[0050] The first gradient tube 2 can be threaded to the intake pipe 1 and other components, providing a secure connection that is easy to disassemble and replace. Alternatively, the first gradient tube 2 can be connected to the intake pipe 1 and other components via quick-connect fittings, making installation and disassembly very convenient and suitable for applications requiring frequent replacement. The first gradient tube 2 can also be flanged, using flanges and bolts for connections suitable for applications requiring high sealing and stability.

[0051] The second gradient tube 3 is also a specially designed pipe, with its outer diameter gradually decreasing from one end to the other. Specifically, the second gradient tube 3 can also be a straight gradient type, a curved gradient type, a straight gradient stepped gradient type, or a tapered gradient type. The second gradient tube 3 can also be composed of metal materials, plastic materials, and other composite materials. The shape and material of the second gradient tube 3 can be the same as or different from that of the first gradient tube 2, and its dimensions, especially the outer diameter of the second gradient tube 3, are smaller than those of the first gradient tube 2, thereby adapting to a wider range of tubes or other pipeline systems with different diameters. This ensures that the cleaning medium (such as air or nitrogen) can smoothly enter and cover the entire interior of the pipe, thereby achieving an effective cleaning effect.

[0052] The second gradient tube 3 can be connected to the intake pipe 1, meaning it can be directly connected to the intake pipe 1 to replace the first gradient tube 2, or it can be connected to the first gradient tube 2 indirectly to the intake pipe 1. Compared to installing one gradient tube, setting two different sizes of first gradient tubes 2 and second gradient tubes 3 allows for the installation of a larger-diameter first gradient tube 2 on heat exchanger tubes with larger diameters to meet their cleaning requirements, and the installation of a smaller-diameter second gradient tube 3 on heat exchanger tubes with smaller diameters to meet their cleaning requirements. This allows for wider adaptation to heat exchanger tubes or other piping systems of different diameters.

[0053] Compared to existing technologies, the heat exchanger tube cleaning tool provided in this disclosure has a first gradient tube 2, and the first end of the first gradient tube 2 with a larger outer diameter is in contact with the air inlet pipe 1. This allows the second end of the first gradient tube 2 with a smaller outer diameter to extend into the interior of heat exchanger tubes of different diameters, concentrating the airflow and improving the purging effect. The gradient section of the first gradient tube 2 can also block the end of the heat exchanger tube, preventing instability and shaking at the end of the blowing pipe due to the space gap between them. In addition, a second gradient tube 3 with a smaller outer diameter is also provided. The second gradient tube 3 can be connected to the air inlet pipe 1 to replace or connect to the first gradient tube 2. This satisfies the cleaning needs of heat exchanger tubes with larger diameters while also meeting the cleaning needs of heat exchanger tubes with smaller diameters. This enables rapid and efficient cleaning of internal water accumulation in the heat exchanger tubes, ensuring the internal cleaning effect and thus guaranteeing the authenticity and accuracy of the tube testing. It also avoids rust and corrosion caused by long-term exposure to air after cleaning the heat exchanger tubes, meets the conditions for water pressure leak testing, eliminates interference factors, and ensures the authenticity of the water pressure leak testing process.

[0054] In some modified embodiments of this disclosure, the first end of the first gradient tube 2 is detachably connected to the air inlet pipe 1, and the first end of the second gradient tube 3 is also detachably connected to the air inlet pipe 1. By replacing gradient tubes of different specifications, different diameter tubes can be accommodated, ensuring that the cleaning medium is evenly distributed throughout the entire tube. Furthermore, appropriate gradient tube combinations can be selected based on the specific conditions inside the tube (such as the type of dirt, the distribution of deposits, etc.) to improve the cleaning effect. The gradient tubes can also be quickly replaced, reducing downtime and preparation work, and improving overall work efficiency.

[0055] The first end of the first tapered tube 2 and the first end of the second tapered tube 3 can be connected to the intake pipe 1 in various ways. Specifically, a threaded connection can be used, which ensures a tight and airtight connection. Threaded connections are simple, reliable, and easy to disassemble and install. For example, the end of the intake pipe 1 can be designed with an external thread, and the first end of the first tapered tube 2 can be designed with an internal thread, connecting them via a threaded connection. Alternatively, the end of the intake pipe 1 can be designed with an internal thread, and the first end of the first tapered tube 2 with an external thread, connecting them via a threaded connection. The first end of the first tapered tube 2 and the first end of the second tapered tube 3 can also be connected to the intake pipe 1 via a quick-connect fitting, making installation and disassembly very convenient and suitable for applications requiring frequent tapered tube replacement. For example, the end of the intake pipe 1 can be designed with a quick-connect fitting, and the second ends of the first tapered tube 2 and the second tapered tube 3 can be designed with corresponding insertion holes, connecting them via a quick-connect fitting. The first end of the first gradient tube 2 and the first end of the intake pipe 1, as well as the first end of the second gradient tube 3 and the intake pipe 1, can be connected by flanges and bolts, which is suitable for applications requiring high sealing and stability. More specifically, flanges can be designed at the end of the intake pipe 1 and at the first ends of the first gradient tube 2 and the second gradient tube 3, respectively, and connected by bolts.

[0056] like Figure 2 As shown, in some modified embodiments of this disclosure, the first end of the second gradient tube 3 is detachably connected to the second end of the first gradient tube 2. When dealing with tubes of smaller diameter, the second gradient tube 3 can be installed at the second end of the first gradient tube 2, so that the second end of the second gradient tube 3 with a smaller outer diameter can extend into the interior of heat exchanger tubes of different diameters within a smaller range, thereby concentrating the airflow and improving the purging effect; the gradient section of the second gradient tube 3 can also block the end of the heat exchanger tube, avoiding instability and swaying at the end of the blowing pipe due to the space gap between them.

[0057] Specifically, the second end of the first tapered tube 2 can be designed with external threads, and the first end of the second tapered tube 3 can be designed with internal threads, and the two are connected by threads. The second end of the first tapered tube 2 can also be designed with a quick-connect fitting, and the first end of the second tapered tube 3 can be designed with a corresponding insertion hole, and the two are connected by a quick-connect fitting. Flanges can also be designed at the second end of the first tapered tube 2 and the first end of the second tapered tube 3, and connected by bolts.

[0058] In some modified embodiments of this disclosure, the heat exchanger tube cleaning tool further includes a first nozzle 4 and a second nozzle 5. One end of the first nozzle 4 is connected to the second end of the first gradient tube 2, and the other end of the first nozzle 4 is threadedly connected to the first end of the second gradient tube 3. The second nozzle 5 is connected to the second end of the second gradient tube 3.

[0059] The first nozzle 4 and the second nozzle 5 are key components for efficiently spraying cleaning media (such as air or nitrogen) into the interior of the tube. They ensure that the cleaning media can efficiently enter and cover the entire interior of the tube. The shape of the nozzle can be designed according to specific application requirements. Specifically, the nozzle can be a straight tube type, with a smooth interior, suitable for situations requiring straight-line spraying of the cleaning media, reducing resistance, increasing flow rate, and suitable for tubes with small diameter variations. The nozzle can also be a trumpet type, with a gradually widening trumpet shape at the front end, which can increase the spray area and make the cleaning media more evenly distributed, suitable for tubes requiring coverage of a large area. The nozzle can also be a tapered type, with a gradually narrowing front end, which can concentrate the spraying of the cleaning media and increase local impact force, suitable for tubes requiring strong impact to remove stubborn dirt. The nozzle can also be a multi-hole type, with a multi-hole design at the front end, which can disperse the cleaning media into multiple small streams, improving coverage, suitable for tubes requiring even distribution of the cleaning media. The nozzle can also be a vortex type, with an internal vortex groove, which can create a vortex of the cleaning media, improving the cleaning effect, suitable for tubes requiring vortex cleaning.

[0060] Specifically, the nozzle can be threaded onto the gradient tube, providing a secure connection that is easy to disassemble and replace. The nozzle can also be connected to the gradient tube via a quick-connect fitting, making installation and removal very convenient and suitable for applications requiring frequent replacement. Alternatively, the nozzle can be welded to the gradient tube for secure fixing, suitable for applications requiring a permanent connection. The nozzle and gradient tube can also be an integral structure or integrally molded, improving the connection's strength. The aforementioned nozzles refer to the first nozzle 4 and the second nozzle 5, and the aforementioned gradient tubes refer to the first gradient tube 2 and the second gradient tube 3.

[0061] In some modified embodiments of this disclosure, the inner diameter of the second end of the second tapered tube 3 is smaller than the inner diameter of the second end of the first tapered tube 2. That is, the inner diameter of the second end of the first tapered tube 2 is larger than the inner diameter of the second end of the second tapered tube 3. This causes the tapered tube to shrink as its size changes, so that when the first tapered tube 2 cleans larger-sized tubes, the inner diameter of the tapered tube, i.e., the diameter of the tapered tube's outlet, is also larger, thereby meeting the airflow requirements for cleaning larger-sized tubes and improving its cleaning effect.

[0062] In some modified embodiments of this disclosure, the intake pipe 1 includes an intake rigid pipe 11 and an intake flexible pipe 12. The intake rigid pipe 11 is connected to the first end of the first tapered pipe 2, and the intake flexible pipe 12 is connected to the intake rigid pipe 11. The intake rigid pipe 11 is made of a rigid material, and the intake flexible pipe 12 is made of a soft material.

[0063] Specifically, the intake rigid pipe 11 can be made of metal (such as stainless steel or copper) or high-strength plastic, possessing good pressure resistance and corrosion resistance. The intake flexible pipe 12 can be made of rubber, PVC (polyvinyl chloride), or other flexible materials, possessing good flexibility and durability. More specifically, the intake rigid pipe 11 and the first tapered pipe 2, as well as the intake flexible pipe 12 and the intake rigid pipe 11, can be connected by threads, quick-connect fittings, or clamps. For example, the intake flexible pipe 12 and the intake rigid pipe 11 can be fixed together by the first clamp 10.

[0064] The inlet hose 12 provides sufficient flexibility to adapt to different installation spaces and layouts, facilitating operation and relocation, and adapting to various complex installation environments, such as curved pipes and confined spaces. The inlet rigid pipe 11 provides a stable connection, ensuring stable transmission of the cleaning medium and reducing the risk of leakage. The inlet rigid pipe 11 is also easy for operators to hold, allowing the gradient tube to be stably inserted into the end of the heat exchanger tubes. The inlet rigid pipe 11 and the inlet hose 12 can be made of suitable materials according to the properties of the cleaning medium, ensuring corrosion resistance and pressure resistance.

[0065] In some modified embodiments of this disclosure, a handle 7 and a hose reel 8 are also included. The handle 7 is fixedly connected to the intake rigid pipe 11; a portion of the intake hose 12 is wound around the hose reel 8. The handle 7, fixedly connected to the intake rigid pipe 11, provides a grip for the operator, facilitating handheld operation and tool movement. The operator can easily hold the handle 7 for precise operation and positioning. The hose reel 8 is used to store and manage the intake hose 12, preventing the hose from becoming tangled and improving operational convenience and neatness. It allows for quick unfolding and retraction of the intake hose 12, reducing operation time and improving work efficiency.

[0066] The handle 7 comprises a grip portion and a connecting portion. The grip portion can be designed in a circular or oval shape to provide a comfortable hold. The grip portion can be made of plastic, rubber, or metal. Plastic and rubber offer good anti-slip properties and insulation, while metal provides higher strength and durability. Anti-slip textures or coatings can also be designed on the grip portion to increase friction and prevent slippage. The connecting portion can be screws, clips, or other fasteners; that is, the handle 7 can be fixed to the intake rigid pipe 11 using screws, clips, or other fasteners. The connecting portion typically uses metal or high-strength plastic to ensure a secure and stable connection. More specifically, the handle 7 can be a straight-bar handle 7, simple and practical, suitable for applications requiring straight-line operation, such as long-distance pipe cleaning. The handle 7 can also be a crank-type handle 7, with a curved design providing a more natural grip posture, suitable for applications requiring delicate operation, such as short-distance or curved pipe cleaning. The handle 7 can also be a T-shaped handle 7, with a T-shaped design providing a larger grip area, suitable for applications requiring greater operating force, such as high-pressure cleaning. Handle 7 can also be an adjustable handle 7, which can be adjusted in length or angle to meet the needs of different operators and is suitable for multi-person use, such as team work.

[0067] A hose reel 8 is a device used to store and manage hoses (such as water pipes, gas pipes, cables, etc.). It typically consists of a rotating disc or wheel, allowing for manual or automatic winding and unwinding of the hose. The main functions of the hose reel 8 are to keep the hose neat, reduce space occupation, and prevent tangling and damage, thereby improving operational convenience and safety. The hose reel 8 can include a main structure, guide grooves, and locking devices. The main structure is made of plastic or metal; plastic hose reels 8 are lightweight and inexpensive, while metal hose reels 8 are robust and durable. Common shapes for the main structure include circular, elliptical, or rectangular, with a central shaft serving as the rotation center of the hose reel 8, supporting the winding and unwinding of the hose. The central shaft may also be designed with bearings or sliding devices to reduce friction during rotation. Guide grooves are provided on the main structure to guide the hose along a predetermined path for winding and unwinding, preventing tangling or twisting. The guide grooves can be fixed or adjustable to ensure the hose is evenly distributed on the hose reel 8. The locking device is used to secure the position of the hose reel 8 and prevent the hose from accidentally unwinding. It can be a push-button type, a knob type, or a lever type. More specifically, the hose reel 8 can be a manual hose reel 8, operated manually, requiring the operator to manually wind and unwind the hose, suitable for applications where frequent hose unwinding and retraction is not required. The hose reel 8 can also be an automatic hose reel 8, equipped with an automatic spring-loaded mechanism that automatically retracts the hose, suitable for applications requiring frequent hose unwinding and retraction, such as mobile cleaning equipment. The hose reel 8 can also be a portable hose reel 8, small and lightweight, that can be carried and used independently, suitable for applications requiring use in different locations, such as on-site repair and maintenance. The hose reel 8 can also be a fixed hose reel 8, fixed to the tool body and non-removable, suitable for applications requiring fixed-location use, such as workshops and laboratories.

[0068] In some modified embodiments of this disclosure, the handle 7 includes a first connecting rod 71 and a second connecting rod 72, which are parallel to each other. One end of the first connecting rod 71 and the second connecting rod 72 is fixedly connected to the intake rigid pipe 11. The operator can hold the first connecting rod 71 and the second connecting rod 72 with both hands respectively, providing a comfortable grip and facilitating the fixing of the gradient tube to the end of the tube. This is suitable for occasions requiring long-term operation or greater operating force, such as high-pressure cleaning or long-distance tube cleaning.

[0069] In some modified embodiments of this disclosure, a control valve 6 is also included. The control valve 6 is installed on the air inlet pipe 1 and can control the flow rate of the air inlet pipe 1. The control valve 6 is a device for regulating and controlling the flow rate of fluids (such as air or other cleaning media). It can be installed on the air inlet pipe 1 and the flow rate of the fluid is controlled by adjusting the valve opening, thereby achieving precise control of the cleaning media. The control valve 6 can be a ball valve with a spherical valve core, controlling the flow rate of the fluid by rotating the ball. It has rapid switching, good sealing performance, and is suitable for applications requiring rapid fluid shut-off. The control valve 6 can also be a butterfly valve with a butterfly valve core, controlling the flow rate of the fluid by rotating the butterfly disc. It has a compact structure, a wide flow rate adjustment range, and is suitable for applications requiring fine flow rate adjustment. The control valve 6 can also be a needle valve with a needle valve core, controlling the flow rate of the fluid by moving the needle body up and down. It has high adjustment accuracy and is suitable for applications requiring precise flow rate control. The control valve 6 can also be a gate valve with a gate valve core, controlling the flow rate of the fluid by moving the gate up and down. It has smooth switching and is suitable for applications with large flow rates. By installing control valve 6 on the air inlet pipe 1, the controllability and ease of operation of the heat exchanger tube cleaning tool can be significantly improved. Control valve 6 can not only regulate and control the flow rate of the cleaning medium, but also realize on / off control and safety protection, ensuring the efficiency and safety of the cleaning process.

[0070] Example 2

[0071] A heat exchanger tube cleaning system includes the aforementioned heat exchanger tube cleaning tool. The inlet pipe 1 is connected to a gas input device in the system via a connecting pipe 9, such as an air pump or a gas supply pipe in the system. The connecting pipe 9 has a connecting joint 13 and a second clamp 14 at its end, the second clamp 14 being fitted over the connecting joint 13 to secure it.

[0072] Compared to existing technologies, the heat exchanger tube cleaning tool provided in this disclosure features a first gradient tube 2. The larger outer diameter end of the first gradient tube 2 contacts the inlet pipe 1, allowing the smaller outer diameter end of the first gradient tube 2 to extend into heat exchanger tubes of different diameters, concentrating airflow and improving the purging effect. The gradient section of the first gradient tube 2 can also block the ends of the heat exchanger tubes, preventing instability and swaying at the ends of the blowing pipe due to gaps between them. Furthermore, a second gradient tube 3 with an even smaller outer diameter is provided. The second gradient tube 3 can connect to the inlet pipe 1 to replace or connect to the first gradient tube 2, satisfying the cleaning needs of both larger and smaller diameter heat exchanger tubes.

[0073] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A heat exchanger tube cleaning tool, characterized in that, include: Intake pipe; The first tapered tube has an outer diameter that gradually decreases from its first end to its second end, and the first end of the first tapered tube is connected to the intake pipe. The second gradient tube has an outer diameter that gradually decreases from its first end to its second end. The outer diameter of the second end of the second gradient tube is smaller than the outer diameter of the second end of the first gradient tube. The second gradient tube can be connected to the intake pipe.

2. The heat exchanger tube cleaning tool according to claim 1, characterized in that, The first end of the first gradient tube is detachably connected to the intake pipe, and the first end of the second gradient tube is detachably connected to the intake pipe.

3. The heat exchanger tube cleaning tool according to claim 1, characterized in that, The first end of the second gradient tube is detachably connected to the second end of the first gradient tube.

4. The heat exchanger tube cleaning tool according to claim 3, characterized in that, Also includes: A first nozzle, one end of which is connected to the second end of the first gradient tube, and the other end of which is threadedly connected to the first end of the second gradient tube; The second nozzle is connected to the second end of the second gradient tube.

5. The heat exchanger tube cleaning tool according to claim 1, characterized in that, The inner diameter of the second end of the second tapered tube is smaller than the inner diameter of the second end of the first tapered tube.

6. The heat exchanger tube cleaning tool according to claim 1, characterized in that, The intake pipe includes an intake rigid pipe and an intake flexible pipe. The intake rigid pipe is connected to the first end of the first tapered pipe, and the intake flexible pipe is connected to the intake rigid pipe. The intake hard pipe is made of rigid material, while the intake soft pipe is made of flexible material.

7. The heat exchanger tube cleaning tool according to claim 6, characterized in that, Also includes: A handle, which is fixedly connected to the intake rigid pipe; A hose reel, on which a portion of the intake hose is wound.

8. The heat exchanger tube cleaning tool according to claim 7, characterized in that, The handle includes a first connecting rod and a second connecting rod, which are parallel to each other, and one end of the first connecting rod and the second connecting rod is fixedly connected to the intake hard pipe.

9. The heat exchanger tube cleaning tool according to claim 1, characterized in that, Also includes: A control valve is installed on the intake pipe and is capable of controlling the flow rate of the intake pipe.

10. A heat exchanger tube cleaning system, characterized in that, Includes the heat exchanger tube cleaning tool as described in any one of claims 1-9.

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