High-hardness wear-resistant stainless steel heat exchange tube

Abstract

The application discloses a high-hardness wear-resistant stainless steel heat exchange pipe, which comprises a stainless steel heat exchange pipe body and a lining pipe, the lining pipe is sleeved at the outer wall of the stainless steel heat exchange pipe body, a quick-connection assembly is arranged at the outer wall of the lining pipe and is used for quick installation, and a protection assembly is arranged at the outer wall of the lining pipe and is used for preventing electrochemical corrosion. The quick-connection assembly is used for realizing quick installation and reliable sealing, greatly improving assembly efficiency, the protection assembly takes a sacrificial anode protection rod as a core, and through preset fracture points and an automatic trigger locking mechanism, the protection assembly can immediately unlock and release a standby protection rod after the working rod is fractured due to electrochemical corrosion, realizes continuous corrosion protection without manual intervention, and comprehensively enhances the sealing property, wear resistance and overall durability of the heat exchange pipe in combination with a multi-stage sealing structure and external wear-resistant design, so that the service life of the core heat exchange pipe body is significantly prolonged, and maintenance cost and shutdown risk are effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of heat exchange tube technology, specifically a high-hardness wear-resistant stainless steel heat exchange tube. Background Technology

[0002] In the field of industrial heat exchange, stainless steel heat exchange tubes are widely used due to their excellent corrosion resistance and mechanical properties. However, under complex operating conditions, especially in environments with electrolytes, high-speed fluids, and dissimilar metals, stainless steel tubes still face two major challenges: electrochemical corrosion and mechanical wear. Electrochemical corrosion can significantly reduce the tube wall thickness, leading to perforation and leakage, which seriously affects equipment safety and service life; while frequent installation, disassembly, and media erosion place higher demands on the sealing of connection points and the wear resistance of the tube surface.

[0003] Currently, sacrificial anode protection is commonly used to address corrosion problems, which involves installing consumable metal rods (such as zinc or magnesium rods) on the pipe body. However, existing sacrificial anodes are mostly integral or require periodic manual inspection and replacement, failing to provide automatic replenishment after corrosion depletion. When the anodes are exhausted without timely detection, the pipe body will lose protection, posing a risk of sudden corrosion failure. Furthermore, traditional installation methods often use welding or flange connections, which are not only inefficient and inconvenient to disassemble, but also prone to creating gaps at the connection points, exacerbating localized corrosion.

[0004] In addition, to improve wear resistance, a common practice is to add a coating or bushing to the outer wall of the tube. However, this often affects heat exchange efficiency, and the coating is prone to peeling off under long-term erosion, making the protective effect difficult to sustain. Existing quick-connect designs mostly focus on the ease of connection, and their structures often lack integrated consideration for corrosion protection mechanisms, let alone wear-resistant reinforcement designs for the connection area itself.

[0005] Therefore, existing technologies have drawbacks such as discontinuous electrochemical protection, reliance on manual maintenance, low installation efficiency, and separation of wear resistance and corrosion protection functions. There is an urgent need for an integrated solution that can organically combine efficient connection, continuous active corrosion protection, and external wear-resistant protection. Summary of the Invention

[0006] The technical solution adopted in this invention is as follows: a high-hardness, wear-resistant stainless steel heat exchange tube, comprising:

[0007] A stainless steel heat exchange tube body and a liner, wherein the liner is sleeved on the outer wall of the stainless steel heat exchange tube body. A quick-connect assembly is located on the outer wall of the liner tube, and the quick-connect assembly is used for rapid installation; A protective component is provided on the outer wall of the liner, the protective component being used to prevent electrochemical corrosion.

[0008] Furthermore, the quick-connect assembly includes a connector, a protective sleeve, a sealing ring, and a sealing sleeve.

[0009] Furthermore, the connector is fitted onto the outer wall of the liner, the inner wall of the sealing cylinder has an internal thread, one end of the sealing cylinder is connected to the external thread of one end of the connector through the internal thread, the sealing ring is embedded in the outer wall of one end of the sealing cylinder, and the protective cylinder is fitted onto the outer wall of the sealing cylinder.

[0010] Furthermore, the protection component includes a constraint frame, a protection cavity, a storage cavity, a support spring, a return rod, a drag-reducing block, and a locking component.

[0011] Furthermore, the protective cavity is located on the inner wall of the sealing cylinder, the four constraint frames are fixedly installed on the outer wall of one end of the connector, the receiving cavity is located on the inner wall of the sealing cylinder, the four drag-reducing blocks are slidably embedded in the inner wall of the receiving cavity, the four support springs are embedded in the inner wall of the receiving cavity, one end of each of the four support springs is fixedly installed on the outer wall of the corresponding drag-reducing block, one end of the restoration rod is threadedly connected to the protruding threaded end of the drag-reducing block, the locking assembly is located on the inner wall of the sealing cylinder, and the other end of each of the four support springs is fixedly installed on the outer wall of the sealing ring.

[0012] Furthermore, each of the reduction rods has a release groove on one end of its outer wall, and a shearing groove and a locking hole on one end of its outer wall.

[0013] Furthermore, the locking assembly includes a storage ring, a tension spring, and a locking tongue. The three storage rings are spirally and equidistantly embedded in the inner wall of the protective cavity. The three locking tongues are slidably embedded in the inner wall of the storage rings. The three tension springs are embedded in the inner wall of the storage rings. One end of each of the three tension springs is fixedly disposed on the outer wall of the corresponding locking tongue.

[0014] Furthermore, the latch, release groove, and lock hole are matched with each other.

[0015] Furthermore, a sealing gasket is fitted at one end of each of the reduction rods, and four sealing rings are fixedly provided on the outer wall of the connector. The four sealing gaskets are slidably embedded in the inner wall of the sealing rings, and the sealing gaskets match the constraint frame.

[0016] Furthermore, multiple wear-resistant blocks are fixedly provided on the outer wall of the protective cylinder.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) By setting up a protection component with redundant backup and automatic switching functions, the present invention achieves continuous and active protection against electrochemical corrosion. The reduction rod in the protection component acts as a sacrificial anode, which preferentially corrodes to protect the core stainless steel heat exchange tube body and metal parts such as connectors. Its unique automatic replacement mechanism is the core advantage: when a reduction rod breaks at the prefabricated shear groove due to corrosion, the release groove at its broken end will trigger the locking component to act. Specifically, the locking tongue is inserted into the release groove under the action of the tension spring, thereby releasing the lock on the next spare reduction rod (making it disengage from the lock hole). Subsequently, the spare reduction rod is pushed by its corresponding support spring, guided by the drag reduction block to move out of the storage cavity and into the working position. This process does not require manual intervention, realizes the automatic continuation of the protective material, ensures the continuity and seamlessness of the protection, fundamentally avoids the risk of sudden corrosion of the tube body caused by the depletion of a single sacrificial anode, and greatly extends the overall service life.

[0018] (2) The quick-connect component of the present invention integrates multiple functions such as quick installation, reliable sealing and external protection, which greatly improves the engineering applicability and maintenance convenience of the heat exchange tube. The connector and the sealing cylinder are connected by threads, which realizes the quick docking and disassembly of the liner and the external pipeline, improving the installation efficiency. The multi-layer sealing structure (sealing gasket, sealing ring and sealing ring) forms an effective sealing barrier at the connection to prevent media leakage. At the same time, the independent external protective cylinder and the wear-resistant block fixed on it provide robust physical protection for the internal sealing cylinder, connector and other components, enabling them to resist external mechanical wear and collision. It is particularly suitable for complex working conditions with high hardness and high wear, ensuring the long-term stability of the connection structure.

[0019] (3) The present invention enhances the overall mechanical performance and stability through structural optimization. The design of the liner sleeve on the outer wall of the stainless steel heat exchange tube effectively improves the local stiffness and deformation resistance of the tube without significantly increasing the wall thickness. The constraint frame in the protection component not only provides precise guidance for the movement of the reduction rod and prevents it from tilting and jamming, but also serves as a structural reinforcing rib to improve the strength of the end of the connector. The continuous pressure provided by the support spring ensures stable contact between the working end of the reduction rod and the environment. At the same time, the drag reduction block effectively reduces the frictional resistance when the reduction rod slides in the storage cavity, making the automatic switching action more sensitive and reliable. These designs together ensure that the protection mechanism can be executed accurately under various stress environments.

[0020] (4) The intelligent locking and triggering mechanism of the present invention is ingeniously designed, highly reliable and has the potential to indicate status. The locking component adopts a spirally equidistantly arranged storage ring, locking tongue and tension spring, which is compact and responds quickly. The matching of the locking tongue and the release groove and lock hole on the restoration bar is the key to the switching action. Its design ensures that the next spare restoration bar will only be unlocked when the current working restoration bar has broken (the release groove reaches the designated position), avoiding false action. In addition, the successive release mechanism of the restoration bar itself can be used as a "consumption indicator". Maintenance personnel can intuitively assess the remaining life of the corrosion protection system by checking the number or status of the exposed restoration bars, which is convenient for planning preventive maintenance and improves the manageability of the equipment.

[0021] (5) Through modular and integrated design, this invention achieves excellent comprehensive economic benefits. It integrates multiple functions such as quick connection, sealing, wear resistance, and corrosion protection into a module consisting of connectors, sealing cylinders, and protective cylinders, which reduces system complexity, facilitates standardized production and on-site replacement, and reduces the number of unplanned downtimes and expensive tube replacement costs caused by corrosion due to long-term automatic protection. As a replaceable consumable, the cost of the reduction rod is far lower than that of replacing the entire heat exchange tube or dealing with corrosion leakage accidents. Therefore, this invention effectively reduces the operation and maintenance costs throughout the entire life cycle while improving equipment life and reliability, and has significant practical value and economic advantages. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial half-sectional perspective view of the present invention; Figure 3 This is a perspective view of the sealing cylinder of the present invention; Figure 4 This is a perspective view of the reduction rod of the present invention; Figure 5 This is a perspective view of the sealing gasket of the present invention; Figure 6 This is a perspective view of the locking tongue of the present invention.

[0023] The markings in the diagram are: 1. Stainless steel heat exchange tube body; 2. Liner; 3. Connector; 4. Protective cylinder; 5. Sealing ring; 6. Sealing cylinder; 7. Support spring; 8. Reduction rod; 9. Sealing gasket; 10. Drag reduction block; 11. Receiving ring; 12. Tension spring; 13. Locking tongue; 301. Constraint frame; 302. Sealing ring; 401. Wear-resistant block; 601. Protective cavity; 602. Receiving cavity; 801. Release groove; 802. Shearing groove; 803. Lock hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] Example 1 Reference Figure 1 - Figure 6 A high-hardness, wear-resistant stainless steel heat exchange tube includes: a stainless steel heat exchange tube body 1 and a liner 2, the liner 2 being fitted onto the outer wall of the stainless steel heat exchange tube body 1; a quick-connect assembly located on the outer wall of the liner 2 for rapid installation; and a protective assembly located on the outer wall of the liner 2 to prevent electrochemical corrosion. The stainless steel heat exchange tube body 1, as the core heat exchange component, ensures long-term stable operation and efficient heat transfer under harsh working conditions due to its high hardness and wear resistance. The liner 2, fitted onto the outer wall of the stainless steel heat exchange tube body 1, significantly enhances the local stiffness and deformation resistance of the tube body. Simultaneously, as an intermediate layer, it effectively buffers the direct impact of external stress on the body, improving the overall structural durability. The quick-connect assembly is located on the outer wall of the liner 2. At the outer wall of tube 2, the threaded connection design of connector 3, sealing cylinder 6, etc. enables quick installation and disassembly, which greatly improves the efficiency of on-site assembly and maintenance. Combined with the sealing ring 302, sealing ring 5 and other multiple sealing structures, reliable sealing at the connection is ensured to prevent media leakage. The protection component is located at the outer wall of the liner tube 2. Through the sacrificial anode effect of the reduction rod 8, it actively prevents electrochemical corrosion. With the help of the support spring 7, drag reduction block 10 and locking component, it automatically unlocks and replaces the spare reduction rod 8 after the reduction rod 8 breaks due to corrosion. This achieves continuous corrosion protection without manual intervention, thereby significantly extending the service life of the stainless steel heat exchange tube body 1 and related metal parts, reducing maintenance costs and downtime risks.

[0026] Reference Figure 1 - Figure 6The quick-connect assembly includes a connector 3, a protective cylinder 4, a sealing ring 5, and a sealing cylinder 6. The connector 3 is fitted onto the outer wall of the liner 2. The inner wall of the sealing cylinder 6 has an internal thread. One end of the sealing cylinder 6 is connected to the external thread of one end of the connector 3 via the internal thread. The sealing ring 5 is embedded in the outer wall of one end of the sealing cylinder 6. The protective cylinder 4 is fitted onto the outer wall of the sealing cylinder 6. The protective assembly includes a constraint frame 301, a protective cavity 601, a storage cavity 602, a support spring 7, a return rod 8, a drag-reducing block 10, and a locking assembly. The protective cavity 601 is located on the inner wall of the sealing cylinder 6. Four constraint frames 301 are fixedly installed on the outer wall of one end of the connector 3. The storage cavity 602 is located on the inner wall of the sealing cylinder 6. Four drag-reducing blocks 10 are slidably embedded in the storage cavity 602. Four support springs 7 are embedded in the inner wall of the receiving cavity 602. One end of each support spring 7 is fixed to the outer wall of the corresponding drag-reducing block 10. One end of the reducing rod 8 is threaded to the protruding threaded end of the drag-reducing block 10. The locking component is located on the inner wall of the sealing cylinder 6. The other end of each support spring 7 is fixed to the outer wall of the sealing ring 5. The connector 3 is fitted onto the outer wall of the liner 2 and has an external thread, achieving a quick threaded connection with the sealing cylinder 6, significantly improving the installation and disassembly efficiency of the heat exchange tube. The sealing cylinder 6 has an internal thread that fits tightly with the connector 3, ensuring a strong and airtight connection. At the same time, the protective cavity 601 and the receiving cavity 602 inside provide an integrated protection component. The sealing ring 5 is embedded in the outer wall of one end of the sealing cylinder 6, effectively enhancing the end seal, preventing media leakage, and providing a reliable fixing point for the support spring 7. The protective cylinder 4 is sleeved on the outer wall of the sealing cylinder 6, providing external mechanical protection. Combined with the wear-resistant block 401 on its outer wall, it significantly improves the overall wear resistance and impact resistance, extending the service life of the component in harsh environments. The constraint frame 301 is fixedly set on the outer wall of one end of the connector 3, providing precise guidance and constraint for the movement of the restoration rod 8, ensuring its stable alignment during operation. The drag-reducing block 10, which is slidably embedded in the receiving cavity 602, cooperates with the support spring 7. One end of the support spring 7 is fixed to the drag-reducing block 10, and the other end is fixed to the sealing ring 5. The force continuously pushes the drag-reducing block 10 and the reduction rod 8 outward. The design of the drag-reducing block 10 reduces sliding friction, making the release of the reduction rod 8 smoother. The reduction rod 8, as a sacrificial anode, has one end threadedly connected to the protruding threaded end of the drag-reducing block 10 for easy replacement. Through the design of the release groove 801, shear groove 802 and locking hole 803 on its surface, an automatic triggering mechanism is realized after corrosion fracture. The locking components (including the storage ring 11, tension spring 12 and locking tongue 13) are located in the protective cavity 601. Through the matching of the locking tongue 13 with the release groove 801 and locking hole 803 on the reduction rod 8, the spare reduction rod 8 is automatically unlocked when the reduction rod 8 breaks, ensuring the continuity and automation of electrochemical corrosion protection and achieving long-term protection without manual intervention.

[0027] Reference Figure 1 - Figure 6 Each reduction rod 8 has a release groove 801 on one end of its outer wall, and a shearing groove 802 and a locking hole 803 on one end of its outer wall. The locking assembly includes a storage ring 11, a tension spring 12, and a locking tongue 13. The three storage rings 11 are spirally and equidistantly embedded in the inner wall of the protective cavity 601. The protective cavity 601 is filled with a heat-conducting medium to achieve uniform heat exchange. The three locking tongues 13 are slidably embedded in the inner wall of the storage rings 11, and the three tension springs 12 are embedded in the inner wall of the storage rings 11. One end of each of the three tension springs 12 is fixedly set to the corresponding locking tongue 1. On the outer wall of connector 3, the locking tongue 13, release groove 801, and lock hole 803 are matched. One end of each return rod 8 is fitted with a sealing gasket 9. Four sealing rings 302 are fixedly installed on the outer wall of connector 3. The four sealing gaskets 9 are slidably embedded in the inner wall of the sealing rings 302. The sealing gaskets 9 are matched with the constraint frame 301. Multiple wear-resistant blocks 401 are fixedly installed on the outer wall of protective cylinder 4. The release groove 801 opened on the outer wall of one end of return rod 8 provides precise space for the insertion of locking tongue 13 after return rod 8 breaks due to corrosion, thereby triggering the automatic unlocking mechanism of locking component. Shear groove 802 serves as a preset... The weak point is identified to ensure that the reduction rod 8 breaks preferentially at this point under electrochemical corrosion, guaranteeing the reliable start-up of the automatic replacement process. The locking hole 803, during operation, closely engages with the locking tongue 13 to stably lock the spare reduction rod 8 within the storage cavity 602, preventing accidental release. The storage ring 11 in the locking assembly is spirally and equidistantly embedded in the inner wall of the protective cavity 601, optimizing the spatial layout and ensuring precise guidance of the locking tongue 13. The tension spring 12 provides continuous elastic restoring force to the locking tongue 13, enabling it to quickly respond to changes in the state of the reduction rod 8. The locking tongue 13 interacts with the release groove 801 and the locking hole 803. The matching mechanism enables the intelligent switching function of automatically unlocking the backup reduction rod 8 when the reduction rod 8 breaks. The sealing gasket 9 fitted at one end of each reduction rod 8 slides in cooperation with the sealing ring 302 fixed on the outer wall of the connector 3, effectively preventing leakage of the medium along the movement path of the reduction rod 8 and enhancing the overall sealing performance. The matching of the sealing gasket 9 with the constraint frame 301 further ensures the stability of the reduction rod 8 in the working position. The multiple wear-resistant blocks 401 fixed on the outer wall of the protective cylinder 4 significantly improve the wear resistance of the outer surface of the heat exchange tube, resist external mechanical wear and impact, and extend the service life of the equipment under harsh working conditions.

[0028] Working principle: First, the connector 3 is welded and fixed to the outer wall of the liner 2. The liner 2 is fitted onto the outer wall of the stainless steel heat exchange tube body 1, forming the basic structure. Next, the four reduction rods 8 are precision machined, and a release groove 801, a shear groove 802, and a locking hole 803 are opened on the outer wall of one end of each reduction rod 8. These structures are crucial for the subsequent automatic protection mechanism. At the same time, multiple wear-resistant blocks 401 are installed on the outer wall of the protective cylinder 4 to enhance the overall wear resistance and adapt to high-hardness working environments. Then, the protective cylinder 4 and the sealing cylinder 6 are connected to the outer wall of the connector 3. Specifically, the internal thread on the inner wall of the sealing cylinder 6 is tightened with the external thread at one end of the connector 3 to achieve the assembly of the quick-connect component, ensuring rapid installation and disassembly. The sealing ring 5 is embedded. Located on the outer wall of one end of the sealing cylinder 6, it serves a sealing function to prevent media leakage. The protective component includes a constraint frame 301, a protective cavity 601, a receiving cavity 602, a support spring 7, a restoration rod 8, a drag-reducing block 10, and a locking component. The constraint frame 301 is fixedly installed on the outer wall of one end of the connector 3, and there are four of them. The protective cavity 601 is located on the inner wall of the sealing cylinder 6, and the receiving cavity 602 is also located on the inner wall of the sealing cylinder 6. The four drag-reducing blocks 10 are slidably embedded in the inner wall of the receiving cavity 602. The four support springs 7 are embedded in the inner wall of the receiving cavity 602, with one end of each support spring 7 fixedly installed on the outer wall of the corresponding drag-reducing block 10, and the other end fixedly installed on the outer wall of the sealing ring 5. One end of the restoration rod 8 is threaded. The protruding threaded end connected to the drag-reducing block 10 allows the restoration rod 8 to move with the drag-reducing block 10. A sealing gasket 9 is fitted onto one end of each restoration rod 8. Four sealing rings 302 are fixedly installed on the outer wall of the connector 3. The sealing gasket 9 is slidably embedded in the inner wall of the sealing ring 302, and the sealing gasket 9 matches the constraint frame 301 to ensure sealing and stability. The locking assembly includes a storage ring 11, a tension spring 12, and a locking tongue 13. Three storage rings 11 are spirally and equidistantly embedded in the inner wall of the protective cavity 601. Three locking tongues 13 are slidably embedded in the inner wall of the storage rings 11, and three tension springs 12 are embedded in the inner wall of the storage rings 11, with one end of each tension spring 12 fixedly installed on the outer wall of the corresponding locking tongue 13. The locking tongue 13, release groove 801, and lock hole 803 are matched, meaning the locking tongue 13 can be inserted into the release groove 801 or lock hole 803 to achieve locking or unlocking functions. Before use, one of the reduction rods 8 is pulled out, causing the corresponding sealing gasket 9 to disengage from the sealing ring 302, and the corresponding sealing gasket 9 to adhere to the constraint frame 301. At this time, the reduction rod 8 begins to play a protective role by being squeezed by the corresponding support spring 7 and drag-reducing block 10, protecting the stainless steel heat exchange tube body 1 and other metal parts from electrochemical corrosion. During long-term use, the reduction rod 8 will gradually suffer structural damage due to electrochemical corrosion, especially near the shear groove 802, making the reduction rod 8 very easy to break at this point. Once the reduction rod 8 breaks...The support spring 7 continues to press the drag-reducing block 10 and the root of the remaining return rod 8 close to the constraint frame 301. At this time, the release groove 801 of the broken return rod 8 is close to one end of one of the locking tongues 13. Through the action of the tension spring 12, one end of the locking tongue 13 is inserted into the release groove 801, while the other end of the locking tongue 13 disengages from the inner wall of another lock hole 803, thereby releasing the other return rod 8. Then, under the action of the spring force, the other support spring 7 and drag-reducing block 10 drive the other return rod 8 to disengage. The receiving cavity 602 continues to release the material to the outer wall of the connector 3 for continued protection. This process ensures that if one reduction rod 8 breaks due to corrosion, another reduction rod 8 can be automatically unlocked and released to continuously provide electrochemical corrosion protection, thereby extending the service life of the stainless steel heat exchanger tube body 1. In addition, the design of the connector 3, protective cylinder 4, sealing ring 5, and sealing cylinder 6 in the quick-connect assembly makes installation and disassembly more convenient and improves maintenance efficiency. The wear-resistant block 401 on the outer wall of the protective cylinder 4 enhances the overall wear resistance and is suitable for high-hardness applications. In a highly wear-resistant environment, the entire workflow demonstrates the efficiency and automated protection mechanism of this invention. Through precise matching between components, such as the matching of the constraint frame 301 and the sealing gasket 9, and the matching of the locking tongue 13 with the release groove 801 and the locking hole 803, reliable operation of the protection assembly is ensured. In practical applications, this design not only reduces manual intervention but also achieves continuous electrochemical corrosion protection through the redundant reduction rod 8 configuration, thereby ensuring the stable operation of the stainless steel heat exchange tube body 1 under harsh conditions. Simultaneously, the sleeve design of the liner 2 enhances the overall structural strength. The threaded connection between the quick-connect assembly's connector 3 and the sealing cylinder 6 ensures sealing. The constraint frame 301 of the protection assembly guides the movement of the reduction rod 8, the support spring 7 provides continuous pressure, the drag-reducing block 10 reduces friction, the locking assembly's storage ring 11, tension spring 12, and locking tongue 13 achieve automatic switching, the wear-resistant block 401 reduces external wear, and the sealing gasket 9 and sealing ring 302 prevent leakage. All components work together, forming a closed-loop process from initial installation to corrosion response, improving the durability and safety of the heat exchange tube.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-hardness, wear-resistant stainless steel heat exchange tube, characterized in that, include: The stainless steel heat exchange tube body (1) and the liner (2) are fitted on the outer wall of the stainless steel heat exchange tube body (1). A quick-connect assembly is provided on the outer wall of the liner (2), and the quick-connect assembly is used for quick installation; A protective component is provided on the outer wall of the liner (2), the protective component being used to prevent electrochemical corrosion.

2. The high-hardness wear-resistant stainless steel heat exchange tube as described in claim 1, characterized in that: The quick-connect assembly includes a connector (3), a protective sleeve (4), a sealing ring (5), and a sealing sleeve (6).

3. The high-hardness wear-resistant stainless steel heat exchange tube as described in claim 2, characterized in that: The connector (3) is fitted onto the outer wall of the liner (2), the inner wall of the sealing cylinder (6) is provided with an internal thread, one end of the sealing cylinder (6) is connected to the outer thread of one end of the connector (3) through the internal thread, the sealing ring (5) is embedded in the outer wall of one end of the sealing cylinder (6), and the protective cylinder (4) is fitted onto the outer wall of the sealing cylinder (6).

4. The high-hardness wear-resistant stainless steel heat exchanger tube as described in claim 3, characterized in that: The protective components include a constraint frame (301), a protective cavity (601), a storage cavity (602), a support spring (7), a restoration rod (8), a drag-reducing block (10), and a locking component.

5. A high-hardness, wear-resistant stainless steel heat exchanger tube as described in claim 4, characterized in that: The protective cavity (601) is opened on the inner wall of the sealing cylinder (6), the four constraint frames (301) are fixedly set on the outer wall of one end of the connector (3), the storage cavity (602) is opened on the inner wall of the sealing cylinder (6), the four drag-reducing blocks (10) are respectively slidably embedded in the inner wall of the storage cavity (602), the four support springs (7) are respectively embedded in the inner wall of the storage cavity (602), one end of the four support springs (7) is respectively fixedly set on the outer wall of the corresponding drag-reducing block (10), one end of the restoration rod (8) is threadedly connected to the protruding thread end of the drag-reducing block (10), the locking component is set on the inner wall of the sealing cylinder (6), and the other end of the four support springs (7) is fixedly set on the outer wall of the sealing ring (5).

6. The high-hardness wear-resistant stainless steel heat exchanger tube as described in claim 5, characterized in that: Each of the reduction rods (8) has a release groove (801) on one end of its outer wall, and a shearing groove (802) and a lock hole (803) on one end of its outer wall.

7. A high-hardness, wear-resistant stainless steel heat exchanger tube as described in claim 6, characterized in that: The locking assembly includes a storage ring (11), a tension spring (12), and a locking tongue (13). The three storage rings (11) are spirally and equidistantly embedded in the inner wall of the protective cavity (601). The three locking tongues (13) are slidably embedded in the inner wall of the storage rings (11). The three tension springs (12) are embedded in the inner wall of the storage rings (11). One end of each of the three tension springs (12) is fixedly set on the outer wall of the corresponding locking tongue (13).

8. The high-hardness wear-resistant stainless steel heat exchanger tube as described in claim 7, characterized in that: The latch (13), release groove (801), and lock hole (803) are matched with each other.

9. A high-hardness wear-resistant stainless steel heat exchanger tube as described in claim 8, characterized in that: Each of the reduction rods (8) is fitted with a sealing gasket (9) at one end. The outer wall of the connector (3) is fixedly provided with four sealing rings (302). The four sealing gaskets (9) are slidably embedded in the inner wall of the sealing rings (302). The sealing gaskets (9) are matched with the constraint frame (301).

10. A high-hardness, wear-resistant stainless steel heat exchanger tube as described in claim 9, characterized in that: Multiple wear-resistant blocks (401) are fixedly installed on the outer wall of the protective cylinder (4).

Images