Double-pipe heat exchanger with built-in hollow spiral twisted belts

Abstract

The utility model relates to the technical field of heat exchangers and enhanced heat transfer, and discloses a double-pipe heat exchanger with a built-in hollow spiral twisted belt, which comprises a protection mechanism, sealing mechanisms are clamped in two sides of the protection mechanism, a flow guide mechanism is clamped between the two sealing mechanisms, and the protection mechanism comprises a protection shell. According to the double-pipe heat exchanger, spiral flow is generated through the spiral twisted belt body, the convective heat transfer process of protective shell pass fluid and the conveying pipe is enhanced, the scouring effect of the fluid on the outer wall face of the conveying pipe and the inner wall face of the protective shell is enhanced, and the situation that use is affected by internal scaling after the double-pipe heat exchanger is used for a long time is avoided; the hollow structure design of the spiral twisted belt reduces flow resistance loss generated by the spiral twisted belt, the side edge of the hollow spiral twisted belt is cut, dead angles formed by the hollow spiral twisted belt, the inner pipe and the outer pipe are avoided, accumulation of impurity particles in the pipes is prevented, and the use efficiency of the double-pipe heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers and enhanced heat transfer, in particular to a shell-and-tube heat exchanger with built-in hollow spiral twisted belts. Background Art

[0002] The shell and tube heat exchanger is a common heat exchanger with the characteristics of simple structure, stable performance and adjustable heat transfer area. It has been widely used in energy, chemical industry, metallurgy and other fields. The shell and tube heat exchanger is a concentric shell formed by connecting two tubes of different sizes. The cold and hot fluids flow in the tube side and shell side respectively in reverse direction, and heat exchange is achieved through the tube wall.

[0003] Existing shell-and-tube heat exchangers generally use ordinary heat exchange tubes. When the fluid flows through the shell, the radial flow is weak, the fluid mixing is insufficient, and the temperature distribution is uneven, resulting in mediocre heat transfer effect, affecting the working efficiency of the shell-and-tube heat exchanger and reducing the overall heat exchange efficiency of the shell-and-tube heat exchanger.

[0004] Therefore, the utility model provides a shell-and-tube heat exchanger with a built-in hollow spiral twisted belt to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a shell-and-tube heat exchanger with a built-in hollow spiral twisted belt is proposed. On the basis of the traditional shell-and-tube heat exchanger, the shell-and-tube heat exchanger adds a hollow spiral twisted belt on the shell side of the heat exchanger to form a spiral fluid channel. In order to prevent scaling on the contact surface between the hollow spiral twisted belt and the inner and outer tubes of the shell-and-tube heat exchanger, the side of the hollow spiral twisted belt is cut to avoid direct contact between the entire hollow spiral twisted belt and the inner and outer tubes to form a dead angle. The shell-side fluid can realize spiral flow under the action of the spiral twisted belt, which has a flushing effect on the shell-side heat exchange wall surface, thereby reducing the scaling phenomenon of the shell side. The spiral twisted belt is a hollow structure, which can reduce the additional flow resistance loss caused by the spiral twisted belt.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shell-and-tube heat exchanger with a built-in hollow spiral twisted belt, comprising a protection mechanism, a sealing mechanism is provided inside the two sides of the protection mechanism, and a flow guide mechanism is provided between the two sealing mechanisms;

[0007] The protection mechanism includes a protection shell, the sealing mechanism includes a sealing cover, and the flow guiding mechanism includes a delivery pipe;

[0008] Through the above technical scheme, the connection port can be fixed by the protective shell, which is also convenient for the later storage of liquid and water. The two sides of the protective mechanism can be sealed by the sealing cover, which is convenient for the later storage and limiting of liquid and water. The water or liquid can be transported and guided by the delivery pipe, thereby improving the use efficiency of the shell and tube heat exchanger.

[0009] Furthermore, the protective shell has a connection port fixedly disposed on the other side of the upper end and one side of the lower end, and the two connection ports are provided with connection threads inside;

[0010] Through the above technical solution, the water pipe and the shell-and-tube heat exchanger can be conveniently connected by using the connecting port in conjunction with the connecting thread, and water can also be conveniently added to the inside of the shell-and-tube heat exchanger.

[0011] Furthermore, both sides of the protective shell are fixedly provided with card slots, and the front and rear ends of the two card slots are provided with limiting holes;

[0012] Through the above technical solution, the sealing mechanism can be clamped and fixed through the clamping groove, and the insertion rod can be limited and fixed through the limiting hole, which is convenient for the user to disassemble and fix the sealing mechanism at a later time.

[0013] Furthermore, a limiting groove is provided in the middle of the two sealing covers, and a sealing strip is fixedly provided on the outer surface in the middle of the two sealing covers;

[0014] Through the above technical solution, the guide mechanism can be clamped and fixed by the limit groove, and the sealing strip can prevent liquid and water from leaking from the gaps at the connection between the guide mechanism, the protective mechanism and the sealing mechanism, causing safety hazards and affecting the use effect of the shell and tube heat exchanger.

[0015] Furthermore, both sides of the two sealing covers are provided with slide grooves, and one side of the two slide grooves is fixedly provided with a spring;

[0016] Through the above technical solution, the slide groove can limit and fix the spring and the plug rod, and it is also convenient to adjust the position of the plug rod later. The spring can be used to squeeze and limit the plug rod, which is convenient for adjusting and fixing the position of the plug rod later.

[0017] Furthermore, plug rods are slidably arranged inside both sides of the upper ends of the two sealing covers, and limit plates are fixedly arranged at the lower ends of the two plug rods;

[0018] Through the above technical solution, the sealing cover can be clamped and fixed by the insertion rod, which is convenient for disassembly and fixation of the sealing cover at a later time. The insertion rod can play a supporting and fixing role through the limiting plate.

[0019] Furthermore, a spiral twisted belt body is fixedly arranged on the outer surface of the conveying pipe, and sealing rings are fixedly arranged on the outer surfaces of both sides of the conveying pipe;

[0020] Through the above technical scheme, the spiral twisted belt body adopts a hollow structure design to reduce the contact area between the fluid and the spiral twisted belt, thereby reducing the additional flow resistance loss generated by the spiral twisted belt body. The spiral twisted belt body enables the spiral flow of the fluid to be realized, and the outer wall of the protective shell and the inner wall of the conveying pipe can be flushed to prevent scaling of the protective shell and the conveying pipe, which is not easy to accumulate in the shell side. The sealing ring can be used to seal the connection between the guide mechanism and the sealing mechanism to prevent liquid and water from leaking from the connection.

[0021] The utility model has the following beneficial effects:

[0022] 1. The utility model proposes a shell-and-tube heat exchanger with a built-in hollow spiral twisted belt. The spiral flow generated by the spiral twisted belt body strengthens the convective heat transfer process between the protective shell fluid and the conveying pipe, and at the same time enhances the scouring effect of the fluid on the outer wall of the conveying pipe and the inner wall of the protective shell, thereby avoiding the internal scaling of the shell-and-tube heat exchanger due to long-term use and affecting its use. The hollow structure design of the spiral twisted belt reduces the flow resistance loss generated by the spiral twisted belt. The side of the hollow spiral twisted belt is cut to avoid the formation of dead angles between the hollow spiral twisted belt and the inner and outer tubes, thereby preventing the accumulation of impurity particles in the tube and improving the use efficiency of the shell-and-tube heat exchanger.

[0023] 2. The utility model proposes a shell and tube heat exchanger with a built-in hollow spiral twisted belt. The protective mechanism can fix and protect the flow guide mechanism, and it is convenient to connect the heat exchanger body and other equipment for use. At the same time, it can also limit and store the liquid, thereby improving the use efficiency of the shell and tube heat exchanger. The sealing mechanism can seal both sides of the protective mechanism to avoid liquid leakage. At the same time, it is convenient for the later staff to disassemble the sealing mechanism and disassemble, repair or replace the flow guide mechanism inside the shell and tube heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric schematic diagram of the utility model;

[0025] Figure 2 This is an axonometric diagram of the protection mechanism of the utility model;

[0026] Figure 3 This is an axonometric schematic diagram of the flow guide mechanism of the utility model;

[0027] Figure 4 It is a cross-sectional schematic diagram of the sealing mechanism of the present utility model.

[0028] Legend:

[0029] 1. Protective mechanism; 101. Protective shell; 102. Connecting port; 103. Connecting thread; 104. Slot; 105. Limiting hole; 2. Sealing mechanism; 201. Sealing cover; 202. Limiting groove; 203. Sealing strip; 204. Slide; 205. Spring; 206. Insert rod; 207. Limiting plate; 3. Flow guide mechanism; 301. Delivery pipe; 302. Sealing ring; 303. Spiral twisted belt body. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-4 The utility model provides an embodiment: a shell-and-tube heat exchanger with a built-in hollow spiral twisted belt, comprising a protection mechanism 1, sealing mechanisms 2 are provided internally on both sides of the protection mechanism 1, and a flow guide mechanism 3 is provided between the two sealing mechanisms 2.

[0032] The spiral flow generated by the spiral twisted tape body 303 strengthens the convective heat transfer process of the protective shell 101 and the conveying pipe 301, and at the same time enhances the scouring effect of the fluid on the outer wall of the conveying pipe 301 and the inner wall of the protective shell 101. The hollow structure design of the spiral twisted tape body 303 reduces the flow resistance loss generated by the spiral twisted tape body 303, avoids the formation of dead angles between the hollow spiral twisted tape and the inner and outer tubes, and prevents the accumulation of impurity particles in the tube. The protective mechanism 1 can play a role of fixing and protecting the flow guide mechanism 3, and it is also convenient to connect the heat exchanger body and other equipment for use. The sealing mechanism 2 can seal both sides of the protective mechanism 1 to avoid liquid leakage.

[0033] Reference Figure 1-2 The protection mechanism 1 includes a protection shell 101, and a connection port 102 is fixedly provided on the other side of the upper end and one side of the lower end of the protection shell 101. Connecting threads 103 are provided inside the two connection ports 102. Card slots 104 are fixedly provided inside both sides of the protection shell 101. Limiting holes 105 are provided at the front and rear ends of the two card slots 104.

[0034] The connecting port 102 can be fixed by the protective shell 101, and the water pipe and the shell-and-tube heat exchanger can be conveniently connected by using the connecting port 102 in conjunction with the connecting thread 103. The sealing mechanism 2 can be clamped and fixed by the card slot 104, and the insert rod 206 can be limited and fixed by the limiting hole 105, so that the user can disassemble and fix the sealing mechanism 2 at a later time.

[0035] Reference Figure 4 The sealing mechanism 2 includes a sealing cover 201, a limiting groove 202 is provided in the middle of the two sealing covers 201, a sealing strip 203 is fixedly provided on the outer surface in the middle of the two sealing covers 201, a sliding groove 204 is provided on both sides of the inside of the two sealing covers 201, a spring 205 is fixedly provided on one side of the two sliding grooves 204, and an insertion rod 206 is slidably provided inside both sides of the upper ends of the two sealing covers 201, and a limiting plate 207 is fixedly provided at the lower ends of the two insertion rods 206.

[0036] The sealing cover 201 can be used to seal both sides of the protection mechanism 1, which is convenient for the storage and limiting of liquid and water in the later stage. The flow-guiding mechanism 3 can be clamped and fixed through the limiting groove 202. The sealing strip 203 can prevent liquid and water from leaking from the gaps at the connection between the flow-guiding mechanism 3, the protection mechanism 1 and the sealing mechanism 2, which will cause safety hazards and also affect the use effect of the shell-and-tube heat exchanger. The slide groove 204 can limit and fix the spring 205 and the plug rod 206. The spring 205 can be used to squeeze and limit the plug rod 206, which is convenient for adjusting and fixing the position of the plug rod 206 in the later stage. The sealing cover 201 can be clamped and fixed through the plug rod 206, and the plug rod 206 can be supported and fixed through the limiting plate 207.

[0037] Reference Figure 3 The flow guiding mechanism 3 includes a delivery pipe 301 , a spiral twisted belt body 303 is fixedly arranged on the outer surface of the delivery pipe 301 , and sealing rings 302 are fixedly arranged on the outer surfaces of both sides of the delivery pipe 301 .

[0038] Water or liquid can be transported and diverted through the delivery pipe 301. The hollow structure design adopted by the spiral twisted belt body 303 reduces the contact area between the fluid and the spiral twisted belt, thereby reducing the additional flow resistance loss generated by the spiral twisted belt body 303. The connection between the diversion mechanism 3 and the sealing mechanism 2 can be sealed by the sealing ring 302.

[0039] Working principle: The fluid enters the shell through one of the connection ports 102. Under the forced action of the spiral twisted belt body 303, the fluid flows in a spiral manner to generate a secondary flow perpendicular to the mainstream direction. The mass exchange of the cold and hot fluids in the shell is enhanced, which can strengthen the convective heat transfer between the shell fluid and the outer wall of the delivery pipe 301. When the shell fluid passes through the spiral twisted belt body 303, the hollow structure design reduces the contact area between the fluid and the spiral twisted belt body 303, thereby reducing the additional flow resistance loss generated by the spiral twisted belt body 303. At the same time, the spiral twisted belt body 303 promotes the spiral flow generated by the fluid to achieve the outer wall of the delivery pipe 301. The flushing of the surface and the inner wall of the protective shell 101 can prevent the protective shell 101 and the conveying pipe 301 from scaling. By cutting the side of the central spiral twisted belt body 303, a gap is generated between the side of the hollow spiral twisted belt body 303 and the conveying pipe 301 and the protective shell 101. The impurity particles in the shell-side fluid can pass through the shell side smoothly and are not easy to accumulate in the shell side. When the internal guide mechanism 3 needs to be disassembled later, the plug rod 206 at the upper end of the sealing mechanism 2 is slid inward, the internal spring 205 is squeezed, and the sealing cover 201 is disassembled, which is convenient for the user to disassemble, replace or repair the internal guide mechanism 3.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are 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 substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shell-and-tube heat exchanger with a built-in hollow spiral twisted belt, comprising a protection mechanism (1), characterized in that: Sealing mechanisms (2) are provided in a clamped connection inside the two sides of the protection mechanism (1), and a flow guiding mechanism (3) is provided in a clamped connection between the two sealing mechanisms (2); The protection mechanism (1) comprises a protection shell (101), the sealing mechanism (2) comprises a sealing cover (201), the flow guiding mechanism (3) comprises a delivery pipe (301), a spiral twisted belt body (303) is fixedly arranged on the outer surface of the delivery pipe (301), and sealing rings (302) are fixedly arranged on the outer surfaces of both sides of the delivery pipe (301).

2. A shell-and-tube heat exchanger with a built-in hollow spiral twisted belt according to claim 1, characterized in that: The other side of the upper end and one side of the lower end of the protective shell (101) are both fixedly provided with connection ports (102), and connection threads (103) are provided inside the two connection ports (102).

3. The shell-and-tube heat exchanger with a built-in hollow spiral twisted belt according to claim 1, characterized in that: Both sides of the protective shell (101) are fixedly provided with card slots (104), and the front and rear ends of the two card slots (104) are provided with limiting holes (105).

4. The shell-and-tube heat exchanger with a built-in hollow spiral twisted belt according to claim 1, characterized in that: A limiting groove (202) is provided in the middle of the two sealing covers (201), and a sealing strip (203) is fixedly provided on the outer surface in the middle of the two sealing covers (201).

5. The shell-and-tube heat exchanger with a built-in hollow spiral twisted belt according to claim 1, characterized in that: Slide grooves (204) are provided on both sides of the two sealing covers (201), and a spring (205) is fixedly provided on one side of the two slide grooves (204).

6. A shell-and-tube heat exchanger with a built-in hollow spiral twisted ribbon according to claim 1, characterized in that: Insertion rods (206) are slidably arranged inside both sides of the upper ends of the two sealing covers (201), and limiting plates (207) are fixedly arranged at the lower ends of the two insertion rods (206).

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