Metal heat exchange tube for heat exchanger

Abstract

The utility model discloses a metal heat exchange tube for a heat exchanger, the metal heat exchange tube comprises a metal heat exchange tube main body, an outer metal tube, an inner metal tube and a diversion inner tube, the outer metal tube is arranged outside the metal heat exchange tube main body, the inner metal tube is arranged inside the metal heat exchange tube main body, and the inner metal tube and the outer metal tube form the metal heat exchange tube main body. The inner metal pipe is made of stainless steel, the flow guide inner pipes are arranged on the inner side of the inner metal pipe at equal intervals, and the multiple sets of flow guide inner pipes are arranged. The flow guide inner pipe is arranged on the inner side of the metal heat exchange pipe body, so that the flow speed of a condensing agent on the inner side of the metal heat exchange pipe body is increased, and erosion of the inner side wall of the inner metal pipe caused by the fact that a condenser stays on the inner side of the metal heat exchange pipe body for a long time can be avoided. The corrosion rate of the inner side wall of the inner metal pipe can be reduced through reduction of corrosion, corrosion impurities are prevented from being attached to the inner side wall of the inner metal pipe, and the service life of the whole metal heat exchange pipe body can be indirectly prolonged when the metal heat exchange pipe is used.

Description

Technical Field

[0001] The utility model relates to the technical field of metal heat exchange tubes, and particularly relates to a metal heat exchange tube for a heat exchanger. Background Technique

[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. Heat exchangers play an important role in many industrial productions such as chemical industry, petroleum, power, food and others. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used. When a heat exchanger performs heat conversion, heat conversion will be carried out through a metal tube.

[0003] For the existing metal heat exchange tubes used in heat exchangers, when in use, metal tubes made of special materials are mostly adopted, which can reduce the corrosion rate of the metal heat exchange tubes. Thus, when in use, the corrosion residues inside the metal heat exchange tubes can be reduced, thereby indirectly prolonging the service life of the metal heat exchange tubes.

[0004] However, when the existing metal heat exchange tubes are in use, since the inner side wall of the metal heat exchange tube and the main body of the metal heat exchange tube are mostly made of the same material, the corrosion resistance of the inner side of the metal heat exchange tube and the corrosion resistance of the outer side of the metal heat exchange tube are the same when in use. When in use, as long as the coolant flows through the inside of the metal heat exchange tube for a long time, it will corrode the inner side wall of the metal heat exchange tube, causing rust on the inner side wall of the metal heat exchange tube. After long-term accumulation on the inner side wall of the metal heat exchange tube, over time, the metal heat exchange tube will be corroded and damaged and cannot be used.

[0005] Therefore, a metal heat exchange tube for a heat exchanger is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a metal heat exchange tube for a heat exchanger, so as to solve the problem that in the existing use, the corrosion resistance of the inner side of the metal heat exchange tube and the corrosion resistance of the outer side of the metal heat exchange tube are the same. When in use, as long as the coolant flows through the inside of the metal heat exchange tube for a long time, it will corrode the inner side wall of the metal heat exchange tube, causing rust on the inner side wall of the metal heat exchange tube. After long-term accumulation on the inner side wall of the metal heat exchange tube, over time, the metal heat exchange tube will be corroded and damaged and cannot be used as mentioned in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A metal heat exchange tube for a heat exchanger, the metal heat exchange tube includes a metal heat exchange tube main body, an outer metal tube, an inner metal tube, and a diversion inner tube. The outer metal tube is disposed outside the metal heat exchange tube main body, the inner metal tube is disposed inside the metal heat exchange tube main body, the inner metal tube and the outer metal tube constitute the metal heat exchange tube main body. The inner metal tube is made of stainless steel. The diversion inner tubes are arranged at equal intervals inside the inner metal tube, and there are several groups of the diversion inner tubes.

[0008] Optionally, several groups of the diversion inner tubes are all hollow cylinders with one end wide and one end narrow, and the narrow ends of the diversion inner tubes all face the same direction.

[0009] Optionally, the metal heat exchange tube further includes a convex solid reinforcing block fixed on the outer side wall of the inner metal tube and a stainless steel distributed inner rib fixed on the inner side wall of the inner metal tube. The convex solid reinforcing block, the inner metal tube, and the stainless steel distributed inner rib are of an integral structure, and the convex solid reinforcing block, the inner metal tube, and the stainless steel distributed inner rib are all made of stainless steel.

[0010] Optionally, the convex solid reinforcing block is arranged as a cylindrical tube longitudinally covering the outer side wall of the inner metal tube. There is an internal gap outside the inner metal tube, and the internal gap is distributed between the inner metal tube and the outer metal tube.

[0011] Optionally, one end of the outer side wall of the diversion inner tube is fixedly provided with a connecting and fixing block, and the end of the connecting and fixing block away from the outer side wall of the diversion inner tube is fixedly connected to the inner side wall of the inner metal tube.

[0012] Optionally, there is a connecting gap between the outer circumference position of the outer side wall of the diversion inner tube and the inner side wall of the inner metal tube, and the cross-section of the connecting gap is wide at one end and narrow at the other end.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] By the cooperation between the diversion inner tube and the connecting gap arranged inside the metal heat exchange tube main body, the flow rate of the coolant inside the metal heat exchange tube main body is accelerated, which can avoid the erosion of the inner side wall of the inner metal tube caused by the long-term stay of the condenser inside the metal heat exchange tube main body. The reduction of erosion can reduce the corrosion rate of the inner side wall of the inner metal tube, thereby avoiding the adhesion of rust impurities on the inner side wall of the inner metal tube, and indirectly extending the overall service life of the metal heat exchange tube main body during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the metal heat exchange tube main body of the present utility model;

[0016] Figure 2 The Figure 1 schematic enlarged structure view of part A in

[0017] Figure 3 schematic side sectional view of the main body of the metal heat exchange tube of the present utility model;

[0018] Figure 4 The Figure 3 schematic enlarged structure view of part B in

[0019] Figure 5 schematic outer side view of the main body of the metal heat exchange tube of the present utility model.

[0020] In the figure:

[0021] 1. Main body of metal heat exchange tube;

[0022] 2. Outer metal tube;

[0023] 3. Inner metal tube;

[0024] 4. Inner gap;

[0025] 5. Protruding solid reinforcement block;

[0026] 6. Stainless steel distributed inner rib;

[0027] 7. Flow guiding inner tube;

[0028] 8. Connection and fixing block;

[0029] 9. Connection gap. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1-5 , an embodiment provided by the present utility model:

[0032] A metal heat exchange tube for a heat exchanger. The metal heat exchange tube includes a metal heat exchange tube main body 1, an outer metal tube 2, an inner metal tube 3, and a diversion inner tube 7. The outer metal tube 2 is arranged outside the metal heat exchange tube main body 1, and the inner metal tube 3 is arranged inside the metal heat exchange tube main body 1. The inner metal tube 3 and the outer metal tube 2 form the metal heat exchange tube main body 1. The inner metal tube 3 is made of stainless steel. The diversion inner tubes 7 are arranged at equal intervals inside the inner metal tube 3. When in use, the outer metal tube 2 on the outside of the metal heat exchange tube main body 1 is made of ordinary metal, while the inner metal tube 3 arranged on the inner side wall of the metal heat exchange tube main body 1 is made of stainless steel. In this way, when using the whole metal heat exchange tube main body 1, it is not necessary to make the whole metal heat exchange tube main body 1 of stainless steel, because the cost of using stainless steel for the whole is too high. By separating the outer metal tube 2 and the inner metal tube 3, the cost can be reduced in terms of materials. There are several groups of diversion inner tubes 7. Each group of diversion inner tubes 7 is a hollow cylinder with one end wide and one end narrow. The narrow ends of the diversion inner tubes 7 all face the same direction. And at one end of the outer side wall of the diversion inner tube 7, there is a connecting fixing block 8 fixedly arranged. The end of the connecting fixing block 8 far away from the outer side wall of the diversion inner tube 7 is fixedly arranged with the inner side wall of the inner metal tube 3. There is a connecting gap 9 between the outer circumferential position of the outer side wall of the diversion inner tube 7 and the inner side wall of the inner metal tube 3. The cross-section of the connecting gap 9 is wide at one end and narrow at the other end. When in use, make the narrow ends of the diversion inner tubes 7 all face the same direction. When installing the whole metal heat exchange tube main body 1, make the water flow direction and the narrow ends of the diversion inner tubes 7 all face the same direction. In this way, when the coolant enters the inside of the metal heat exchange tube main body 1 for heat energy conversion, the flow rate can be increased, and the inner side wall of the metal heat exchange tube main body 1 can be prevented from being corroded due to long-term stagnation, which can indirectly extend the service life of the whole metal heat exchange tube main body 1.

[0033] The metal heat exchange tube further includes a convex solid reinforcing block 5 fixedly arranged on the outer side wall of the inner metal tube 3 and a stainless steel distributed inner rib 6 fixedly arranged on the inner side wall of the inner metal tube 3. The convex solid reinforcing block 5, the inner metal tube 3, and the stainless steel distributed inner rib 6 are of an integral structure. The convex solid reinforcing block 5, the inner metal tube 3, and the stainless steel distributed inner rib 6 are all made of stainless steel. The convex solid reinforcing block 5 is arranged as a cylindrical tube longitudinally covering the outer side wall of the inner metal tube 3. There is an internal gap 4 outside the inner metal tube 3. The internal gap 4 is distributed between the inner metal tube 3 and the outer metal tube 2. Further, it can be explained that first, there is an internal gap 4 between the outer metal tube 2 and the inner metal tube 3. The setting of the internal gap 4 can reduce the efficiency of heat conduction. In this way, when the inner metal tube 3 receives heat transfer, the temperature of the inner metal tube 3 gradually rises. After the temperature rises, due to the blockage of the internal gap 4, when the heat is conducted to the internal gap 4, the heat conduction will not be so fast due to the influence of the internal gap 4. Therefore, the internal gap 4 has a certain effect of blocking heat conduction.

[0034] Working principle: When the main body 1 of the metal heat exchange tube is installed inside the heat exchanger, since the narrow ends of the diversion inner tubes 7 all face the same direction, when the whole main body 1 of the metal heat exchange tube is installed, the water flow direction and the narrow ends of the diversion inner tubes 7 both face the same direction. In this way, when the coolant enters the inside of the main body 1 of the metal heat exchange tube for heat energy conversion, the flow rate can be increased, and the inner wall of the main body 1 of the metal heat exchange tube can be prevented from being corroded due to long-term stagnation. In this way, the overall service life of the main body 1 of the metal heat exchange tube can be indirectly extended. First, there is an internal gap 4 between the outer metal tube 2 and the inner metal tube 3. The setting of the internal gap 4 can reduce the efficiency of heat conduction. In this case, when the inner metal tube 3 receives heat transfer, the temperature of the inner metal tube 3 gradually rises. After the temperature rises, due to the blockage of the internal gap 4, when the heat is conducted to the internal gap 4, the heat conduction will not be so fast due to the influence of the internal gap 4. Therefore, the internal gap 4 has a certain effect of blocking heat conduction.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A metal heat exchange tube for a heat exchanger, characterized in that: Metal heat exchange tubes include: Metal heat exchange tube body (1); An outer metal tube (2), the outer metal tube (2) being arranged outside the metal heat exchange tube body (1); An inner metal tube (3), the inner metal tube (3) being arranged inside the metal heat exchange tube body (1), the inner metal tube (3) and the outer metal tube (2) forming the metal heat exchange tube body (1), and the inner metal tube (3) being made of stainless steel; The flow-guiding inner tubes (7) are arranged at equal intervals on the inner side of the inner metal tube (3), and the flow-guiding inner tubes (7) are arranged in a plurality of groups.

2. The metal heat exchange tube for heat exchanger according to claim 1, characterized in that: The plurality of groups of the inner flow guiding tubes (7) are all hollow cylinders with one end being wide and the other end being narrow, and the narrow ends of the inner flow guiding tubes (7) are all facing the same direction.

3. The metal heat exchange tube for a heat exchanger according to claim 1, characterized in that: The metal heat exchange tube further comprises a raised solid reinforcement block (5) fixedly mounted on the outer wall of the inner metal tube (3) and a stainless steel distribution inner edge (6) fixedly mounted on the inner wall of the inner metal tube (3); the raised solid reinforcement block (5), the inner metal tube (3) and the stainless steel distribution inner edge (6) are an integrated structure; the raised solid reinforcement block (5), the inner metal tube (3) and the stainless steel distribution inner edge (6) are all made of stainless steel.

4. The metal heat exchange tube for a heat exchanger according to claim 3, characterized in that: The raised solid reinforcement block (5) is arranged as a cylindrical tube longitudinally covering the outer wall of the inner metal tube (3), and an inner gap (4) is arranged on the outer side of the inner metal tube (3), and the inner gap (4) is distributed between the inner metal tube (3) and the outer metal tube (2).

5. The metal heat exchange tube for a heat exchanger according to claim 1, characterized in that: A connection fixing block (8) is fixedly arranged at one end of the outer wall of the flow guiding inner tube (7), and an end of the connection fixing block (8) away from the outer wall of the flow guiding inner tube (7) is fixedly arranged on the inner wall of the inner metal tube (3).

6. The metal heat exchange tube for a heat exchanger according to claim 1, characterized in that: A connection gap (9) is provided between the outer circle of the outer wall of the inner guide tube (7) and the inner wall of the inner metal tube (3), and the cross section of the connection gap (9) is wide at one end and narrow at the other end.

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