Seamless stainless steel tube for heat exchanger

Abstract

The utility model relates to the technical field of seamless steel tubes, and discloses a stainless steel seamless steel tube for a heat exchanger, which comprises a main tube, the upper and lower sides of the right end of the main tube are connected with sliders through connecting components, the outer wall of the main tube is provided with a protective connecting layer, and the inward side of the protective connecting layer is provided with a heat insulation layer. A supporting reinforcing layer is arranged on the inward side of the heat insulation layer, a reinforced heat transfer layer is arranged on the inward side of the supporting reinforcing layer, an innermost layer is arranged on the inward side of the reinforced heat transfer layer, and the connecting assembly comprises four fixing rods fixedly connected to the inner walls of the upper side and the lower side of the right end of the main pipe; the inner walls of the two sliding blocks are slidably connected to the outer wall of the fixing rod. According to the stainless steel pipe, the main pipe and the U-shaped pipe can be conveniently connected by moving the sliding blocks, subsequent disassembly of the main pipe and the U-shaped pipe is facilitated, the inner wall of the steel pipe is cleaned, the heat transfer performance of the stainless steel pipe is improved by arranging the interior of the stainless steel pipe in a layered mode, and the heat exchange process is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, in particular to a stainless steel seamless steel pipe for a heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. The heat exchanger steel pipe is a key component used for heat exchange in the heat exchanger. Since it is immersed in water for a long time, it is mostly made of stainless steel and is widely used in heat exchanger equipment in petrochemical, electric power, metallurgy, pharmaceutical, food, HVAC and other industries.

[0003] Traditionally, heat exchange tubes used in heat exchangers are mainly made of stainless steel pipes. In order to ensure sealing, the various components are connected by welding. However, after long-term use, the inner wall of heat exchange pipes made of welded stainless steel pipes will produce dirt. These attached dirt greatly affects the heat exchange of the medium in the pipe. However, due to the large number of bends in the heat exchange pipes, it is very difficult to clean, and the heat transfer efficiency of the current stainless steel seamless pipes is poor.

[0004] In this regard, in order to solve the problems that it is difficult to disassemble various parts of steel pipes for cleaning and the heat transfer efficiency of steel pipes is low, the present application proposes a stainless steel seamless pipe for heat exchanger. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, and the proposed heat exchanger uses a stainless steel seamless pipe, which has convenient components for disassembly and cleaning, and has better heat transfer performance.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The stainless steel seamless steel pipe for the heat exchanger includes a main pipe, one end of which is spliced ​​with a U-shaped pipe, the upper and lower sides of the right end of the main pipe are connected to sliders through connecting components, the outer wall of the main pipe is provided with a protective connecting layer, the inner side of the protective connecting layer is provided with a heat insulation layer, the inner side of the heat insulation layer is provided with a supporting reinforcement layer, the inner side of the supporting reinforcement layer is provided with an enhanced heat transfer layer, and the inner side of the enhanced heat transfer layer is provided with the innermost layer.

[0008] Furthermore, the connecting assembly includes four fixing rods fixedly connected to the inner walls of the upper and lower sides of the right end of the main pipe, and the inner walls of the two sliding blocks are slidably connected to the outer walls of the fixing rods.

[0009] Furthermore, one opposite end of each of the two sliders is fixedly connected to a return spring, and the inward end of the return spring is fixedly connected to the upper and lower inner walls of the right end of the main pipe.

[0010] Furthermore, a connecting ring is fixedly connected to the left end of the U-shaped tube, and rectangular grooves are provided at both upper and lower ends of the connecting ring, and the size of the rectangular groove is consistent with the size of the slider.

[0011] Furthermore, the main pipe and the U-shaped pipe are made of the same material, and the protective connecting layer is made of 304 stainless steel.

[0012] Furthermore, the thermal insulation layer is made of ceramic fiber material, the supporting reinforcement layer is made of duplex stainless steel 2205, the enhanced heat transfer layer is made of 304 stainless steel with naval brass added, and the innermost layer is made of 316L stainless steel.

[0013] Furthermore, the main pipe port is tightly connected to the U-shaped pipe port to prevent water from leaking.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the main pipe and the U-shaped pipe can be connected conveniently by moving the slider, which is convenient for subsequent disassembly and cleaning of the inner wall of the steel pipe, thereby improving the use quality of the stainless steel pipe and reducing the workload of the operator who cleans the steel pipe.

[0016] 2. In the present invention, by arranging the layers inside the stainless steel pipe, the heat transfer performance of the stainless steel pipe is improved, making the heat exchange process more efficient, helping to accurately control the temperature, reduce energy consumption, save energy and reduce consumption, and improve the system response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the stainless steel seamless pipe for heat exchanger proposed in the present utility model;

[0018] Figure 2 This is a structural diagram of the connecting ring of the stainless steel seamless steel pipe for the heat exchanger proposed in the utility model;

[0019] Figure 3 This is a structural diagram of a slider of a stainless steel seamless steel pipe for a heat exchanger proposed in the present utility model;

[0020] Figure 4 This is a structural diagram of the fixing rod of the stainless steel seamless steel pipe for the heat exchanger proposed in the utility model;

[0021] Figure 5 This is a cross-sectional view of the main pipe of the stainless steel seamless steel pipe for the heat exchanger proposed in the present invention;

[0022] Figure 6 This is a half-section view of the main pipe of the stainless steel seamless steel pipe for the heat exchanger proposed by the present invention.

[0023] Legend:

[0024] 1. Main pipe; 2. U-shaped pipe; 3. Connecting ring; 4. Slider; 5. Rectangular groove; 6. Fixing rod; 7. Return spring; 8. Protective connection layer; 9. Thermal insulation layer; 10. Support and reinforcement layer; 11. Enhanced heat transfer layer; 12. Innermost layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1-Figure 3 The utility model provides an embodiment of a stainless steel seamless steel pipe for heat exchanger, comprising a main pipe 1, one end of which is spliced ​​with a U-shaped pipe 2, four fixing rods 6 are fixedly connected to the inner walls of the upper and lower sides of the right end of the main pipe 1, and the inner walls of the two sliders 4 are slidably connected to the outer walls of the fixing rods 6, wherein the reference Figure 4 The two sliders 4 are fixedly connected to the opposite ends of the return spring 7, and the inner end of the return spring 7 is fixedly connected to the upper and lower inner walls of the right end of the main pipe 1. The end of the main pipe 1 is tightly connected to the end of the U-shaped pipe 2 to prevent water from leaking.

[0027] Specifically, since the heat exchanger needs to work under many special working conditions, a U-shaped tube 2 is required. A sealing ring is provided at the connection between the main pipe 1 and the port of the U-shaped tube 2 to prevent water leakage. The return spring 7 has heat resistance and high strength, and the fixed rod 6 provides support for the sliding of the slider 4.

[0028] Reference Figure 1 、 Figure 5 and Figure 6 The outer wall of the main pipe 1 is provided with a protective connecting layer 8, a thermal insulation layer 9 is provided on the inner side of the protective connecting layer 8, a supporting reinforcement layer 10 is provided on the inner side of the thermal insulation layer 9, an enhanced heat transfer layer 11 is provided on the inner side of the supporting reinforcement layer 10, and an innermost layer 12 is provided on the inner side of the enhanced heat transfer layer 11. The main pipe 1 and the U-shaped pipe 2 are made of the same material, the protective connecting layer 8 is made of 304 stainless steel, the thermal insulation layer 9 is made of ceramic fiber material, the supporting reinforcement layer 10 is made of duplex stainless steel 2205, the enhanced heat transfer layer 11 is made of 304 stainless steel with added naval brass, and the innermost layer 12 is made of 316L stainless steel.

[0029] Specifically, the protective connection layer 8 is made of 304 stainless steel. 304 stainless steel has good atmospheric corrosion resistance and mechanical properties, can resist external physical damage and general chemical corrosion, and is convenient for welding and other connection operations with other equipment. The thermal insulation layer 9 is made of ceramic fiber material. Ceramic fiber has the characteristics of light weight, high temperature resistance, and good thermal insulation performance. It has a low thermal conductivity coefficient and can effectively prevent heat from being transferred to the outside. The supporting reinforcement layer 10 is duplex stainless steel 2205, which has high strength and good corrosion resistance. It has high yield strength and tensile strength, can withstand huge pressure, and ensure the stability of the steel pipe structure. The main body of the enhanced heat transfer layer 11 is 304 stainless steel, to which naval brass is added. Naval brass copper alloy has good thermal conductivity, which can further improve the heat transfer efficiency. The innermost layer 12 is 316L stainless steel. 316L stainless steel contains molybdenum, which makes it exhibit good corrosion resistance when facing corrosive media such as chloride ions. It has excellent tolerance to various inorganic and organic acids. Its surface roughness is low, which can reduce dirt adhesion and fluid resistance.

[0030] Working principle: When cleaning the inner walls of the main pipe 1 and the U-shaped pipe 2, press the slider 4 on the main pipe 1 to slide the slider 4 on the fixed rod 6, and make the slider 4 compress the reset spring 7, disengage the slider 4 from the rectangular groove 5 of the connecting ring 3 on the U-shaped pipe 2, separate the main pipe 1 and the U-shaped pipe 2, and clean the inner walls of the main pipe 1 and the U-shaped pipe 2. After cleaning, press the slider 4 to connect the ports of the main pipe 1 and the U-shaped pipe 2, release the slider 4, and the reset spring 7 will bounce the slider 4 back. Insert the slider 4 into the rectangular groove 5 of the connecting ring 3 on the U-shaped pipe 2 to reconnect the main pipe 1 and the U-shaped pipe 2. The protective connecting layer 8 is mainly used for protection and connection, the thermal insulation layer 9 prevents heat loss, the supporting and reinforcing layer 10 plays a role of support and reinforcement, the heat transfer enhancement layer 11 enhances the heat transfer efficiency, and the innermost layer 12 is mainly responsible for conveying the medium and is in direct contact with the heat exchange fluid.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Seamless stainless steel pipe for heat exchanger, characterized by: The invention comprises a main pipe (1), one end of which is spliced ​​with a U-shaped pipe (2), the upper and lower sides of the right end of the main pipe (1) are connected to sliders (4) through connecting components, the outer wall of the main pipe (1) is provided with a protective connecting layer (8), the inner side of the protective connecting layer (8) is provided with a heat insulation layer (9), the inner side of the heat insulation layer (9) is provided with a supporting reinforcement layer (10), the inner side of the supporting reinforcement layer (10) is provided with an enhanced heat transfer layer (11), and the inner side of the enhanced heat transfer layer (11) is provided with an innermost layer (12).

2. The seamless stainless steel pipe for heat exchanger according to claim 1, characterized in that: The connecting assembly comprises four fixing rods (6) fixedly connected to the inner walls of the upper and lower sides of the right end of the main pipe (1), and the inner walls of the two sliding blocks (4) are both slidably connected to the outer walls of the fixing rods (6).

3. The seamless stainless steel pipe for heat exchanger according to claim 2, characterized in that: The two sliders (4) are fixedly connected to a return spring (7) at one opposite end, and the inward end of the return spring (7) is fixedly connected to the upper and lower inner walls of the right end of the main pipe (1).

4. The seamless stainless steel pipe for heat exchanger according to claim 1, characterized in that: The left end of the U-shaped tube (2) is fixedly connected to a connecting ring (3), and rectangular grooves (5) are provided at both upper and lower ends of the connecting ring (3), and the size of the rectangular groove (5) is consistent with the size of the slider (4).

5. The seamless stainless steel pipe for heat exchanger according to claim 1, characterized in that: The main pipe (1) and the U-shaped pipe (2) are made of the same material, and the protective connecting layer (8) is made of 304 stainless steel.

6. The seamless stainless steel pipe for heat exchanger according to claim 1, characterized in that: The heat insulation layer (9) is made of ceramic fiber material, the support reinforcement layer (10) is made of duplex stainless steel 2205, the enhanced heat transfer layer (11) is made of 304 stainless steel with naval brass added, and the innermost layer (12) is made of 316L stainless steel.

7. The seamless stainless steel tube for heat exchanger according to claim 1, characterized in that: The port of the main pipe (1) is tightly connected to the port of the U-shaped pipe (2) so that water will not leak out.

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