Stainless steel double-tube double-tube-plate floating heat exchanger

Abstract

The utility model discloses a stainless steel double-tube double-tube-plate floating heat exchanger which comprises an air inlet tube box and a fixed end outer tube plate, and the fixed end outer tube plate is fixedly arranged on the right side of the air inlet tube box. According to the utility model, through an expanded connection mode, the stability of mutual connection between the outer cooling pipe and the inner cooling pipe and the pipe plates on the left side and the right side of the shell is ensured under the working conditions that media on the pipe shell side are not allowed to be mixed and the pressure difference is large, so that through the adoption of the device, the reliability and the safety of product sealing are improved; meanwhile, the heat exchange performance of the product is considered. According to the utility model, the concave inner cavity is designed between the inner tube plate and the outer tube plate, and the concave inner cavity is matched with the groove for use, so that whether leakage occurs in the use process of the outer cooling tube and the inner cooling tube or not can be detected in real time, and therefore, by using the device disclosed by the utility model, the safety of a product during operation is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, specifically a stainless steel double-tube double-tube sheet floating heat exchanger Background Art

[0002] Generally, heat exchangers have two heat exchange spaces, into which cold and hot fluids are introduced respectively, so that the cold and hot liquids in the two cold and hot spaces can achieve heat exchange. It is common that the two fluids are located on the inside and outside of the cooling tube respectively, and when the connection between the cooling tube and the tube sheet fails or the cooling tube breaks, leakage is likely to occur, resulting in cross contamination.

[0003] The patent name is "A double-tube heat exchanger" with the announcement number "CN215984110U". The device in the public document solves the above problems. However, the shortcomings in the public document are that when the pressure difference on the shell and tube side of the conventional shell and tube heat exchanger is large, leakage at the connection between the cooling tube and the tube sheet is one of the common faults. Once leakage occurs, the medium on the shell and tube side will contact each other, causing the pressure on the low-pressure side to suddenly rise, resulting in failure and damage of the pressure-bearing components on the low-pressure side. At the same time, if the medium on the shell and tube side reacts with each other, it will also cause serious chemical reactions, endangering the safety of the equipment and even leading to catastrophic accidents. Based on this, the utility model designs a stainless steel double-tube double-tube sheet floating heat exchanger to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a stainless steel double-tube double-tube sheet floating heat exchanger to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stainless steel double-tube double-tube sheet floating heat exchanger, comprising an air inlet pipe box and a fixed-end outer tube sheet, wherein the fixed-end outer tube sheet is fixedly arranged on the right side of the air inlet pipe box, a heat exchange component is arranged on the right side of the fixed-end outer tube sheet, the heat exchange component comprises a fixed-end inner tube sheet arranged on the right side of the fixed-end outer tube sheet, a shell is fixedly arranged on the right side of the fixed-end inner tube sheet, an inner cylinder is fixedly arranged inside the shell, a movable-end inner tube sheet is fixedly arranged on the right side of the shell, a movable-end outer tube sheet is arranged on the right side of the movable-end inner tube sheet, and an air outlet pipe box is fixedly arranged on the right side of the movable-end outer tube sheet.

[0006] Furthermore, the fixed end outer tube sheet and the fixed end inner tube sheet are connected by welding, and the movable end outer tube sheet and the movable end inner tube sheet are connected by welding.

[0007] Furthermore, an outer cooling pipe is arranged inside the inner cylinder, and an inner cooling pipe is arranged inside the outer cooling pipe.

[0008] Furthermore, a partition is fixedly provided inside the inner cylinder, the partition is designed to be vertically crossed with the outer cooling pipe, and the partition is fixedly sleeved on the outside of the outer cooling pipe.

[0009] Furthermore, a pressing ring is sleeved on the right side of the outer shell, and the side view cross section of the inner part of the pressing ring is larger than the side view cross section of the outer tube sheet at the movable end and the inner tube sheet at the movable end.

[0010] Furthermore, the fixed end inner tube sheet and the movable end inner tube sheet are in a parallel design state, and the fixed end inner tube sheet and the movable end inner tube sheet are designed to be connected with the external cooling tube by expansion connection.

[0011] Furthermore, the fixed end outer tube sheet and the movable end outer tube sheet are in a parallel design state, and the fixed end outer tube sheet and the movable end outer tube sheet are connected to the inner cooling tube by welding and expansion connection.

[0012] Furthermore, the inner cylinder has a floating structure, the outer cooling tube and the inner cooling tube are connected by expansion, and the inner diameter of the outer cooling tube is larger than the outer diameter of the inner cooling tube, and a concave inner cavity design is provided between the fixed end outer tube sheet and the fixed end inner tube sheet and between the movable end outer tube sheet and the movable end inner tube sheet.

[0013] Furthermore, four grooves are integrally provided inside the outer cooling tube, and the cross-section of the groove is designed to be semicircular in side view.

[0014] Furthermore, the four grooves are designed to be distributed around the center of the outer cooling pipe, and the angle between any two of the grooves is 90 degrees.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model solves the problem that the medium on the tube shell side is not allowed to mix and the pressure difference is large under the working condition that the outer cooling tube and the inner cooling tube are connected to the tube sheets on the left and right sides of the shell by means of expansion connection. It can be seen that by using the device in the present application, the reliability and safety of the product sealing are improved, while taking into account the heat exchange performance of the product.

[0017] 2. The utility model designs a concave inner cavity between the inner and outer tube plates, and then uses the concave inner cavity in conjunction with the groove to detect in real time whether the outer cooling tube and the inner cooling tube will leak during use. It can be seen that by using the device in this application, the safety of the product during operation is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A three-dimensional diagram of the utility model stainless steel double-tube double-tube sheet floating heat exchanger;

[0020] Figure 2 A perspective view of the outer cooling tube;

[0021] Figure 3 An enlarged stereogram of the groove;

[0022] Figure 4 It is a partial enlarged view of the fixed end outer tube sheet and the fixed end inner tube sheet;

[0023] Figure 5 It is a partial enlarged view of the inner tube sheet at the movable end and the outer tube sheet at the movable end;

[0024] Figure 6 It is a connection diagram of the fixed end outer tube sheet, the fixed end inner tube sheet, the outer cooling tube and the inner cooling tube.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-inlet pipe box, 2-fixed end outer tube sheet, 3-heat exchange component, 301-fixed end inner tube sheet, 302-shell, 303-inner cylinder, 304-movable end inner tube sheet, 305-movable end outer tube sheet, 306-outlet pipe box, 4-external cooling pipe, 5-internal cooling pipe, 6-partition, 7-pressing ring, 8-groove. DETAILED DESCRIPTION

[0027] 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 of 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. Example

[0028] like Figure 1 , Figure 4 , Figure 5As shown, the device includes an air inlet pipe box 1 and a fixed end outer tube sheet 2, the fixed end outer tube sheet 2 is fixedly arranged on the right side of the air inlet pipe box 1, a heat exchange component 3 is arranged on the right side of the fixed end outer tube sheet 2, the heat exchange component 3 includes a fixed end inner tube sheet 301 arranged on the right side of the fixed end outer tube sheet 2, a shell 302 is fixedly arranged on the right side of the fixed end inner tube sheet 301, an inner cylinder 303 is fixedly arranged inside the shell 302, a movable end inner tube sheet 304 is fixedly arranged on the right side of the shell 302, a movable end outer tube sheet 305 is arranged on the right side of the movable end inner tube sheet 304, and an air outlet pipe box 306 is fixedly arranged on the right side of the movable end outer tube sheet 305.

[0029] The fixed end outer tube sheet 2 is connected to the fixed end inner tube sheet 301 by welding, the movable end outer tube sheet 305 is connected to the movable end inner tube sheet 304 by welding, an outer cooling tube 4 is arranged inside the inner cylinder 303, and an inner cooling tube 5 is arranged inside the outer cooling tube 4. First, the outer cooling tube 4 is made of stainless steel welded tube, and the outer cooling tube 4 is connected with the fixed end inner tube sheet 301 and the movable end inner tube sheet 304 by expansion connection. Before the inner cooling tube 5 is installed, the outer cooling tube 4 and the tube bundle of the fixed end inner tube sheet 301 and the movable end inner tube sheet 304 are subjected to pressure test. After passing the test, the inner cooling tube 5, the fixed end outer tube sheet 2 and the movable end outer tube sheet 305 are inserted. After the outer cooling tube 4 and the inner cooling tube 5 are fitted by expansion connection, the fixed end outer tube sheet 2 and the movable end outer tube sheet 305 on the left and right sides are connected with the outer cooling tube 4 and the inner cooling tube 5 by dual methods of welding and expansion connection, and then the fixed end outer tube sheet 2 is welded to the fixed end inner tube sheet 301, and the movable end outer tube sheet 305 is welded to the movable end inner tube sheet 304, and then the inner cavity area after welding is subjected to sealing test. Example

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 6As shown, a partition 6 is fixedly arranged inside the inner cylinder 303, and the partition 6 and the outer cooling tube 4 are in a vertically crossed design, and the partition 6 is fixedly sleeved on the outside of the outer cooling tube 4, and a pressing ring 7 is sleeved on the right side of the outer shell 302, and the side view cross section of the inside of the pressing ring 7 is larger than the side view cross section of the movable end outer tube sheet 305 and the movable end inner tube sheet 304, the fixed end inner tube sheet 301 and the movable end inner tube sheet 304 are in a parallel design state, the fixed end inner tube sheet 301 and the movable end inner tube sheet 304 are in an expansion connection design with the outer cooling tube 4, the fixed end outer tube sheet 2 and the movable end outer tube sheet 305 are in a parallel design state, and the fixed end outer tube sheet 2 is in a parallel design state. The movable end outer tube sheet 305 is designed to be connected to the inner cooling tube 5 by welding and expansion, the inner cylinder 303 has a floating structure, the outer cooling tube 4 and the inner cooling tube 5 are connected by expansion, and the inner diameter of the outer cooling tube 4 is larger than the outer diameter of the inner cooling tube 5, and a concave inner cavity design is provided between the fixed end outer tube sheet 2 and the fixed end inner tube sheet 301 and between the movable end outer tube sheet 305 and the movable end inner tube sheet 304. Four grooves 8 are integrally arranged inside the outer cooling tube 4. The cross-section of the groove 8 is semicircular when viewed from the side. The four grooves 8 are distributed around the center of the outer cooling tube 4, and the angle between the grooves 8 is 90 degrees.

[0031] According to the operation mode in Example 1, when the outer cooling tube 4 and the inner cooling tube 5 are combined, the concave inner cavity formed between the fixed end outer tube sheet 2 and the fixed end inner tube sheet 301 and the movable end outer tube sheet 305 and the movable end inner tube sheet 304 cooperates with the groove 8, so as to detect in real time whether the outer cooling tube 4 and the inner cooling tube 5 are leaking, and ensure the safe operation of the product. The partition 6 is the mounting carrier of the outer cooling tube 4, and the pressing ring 7 ensures the sealing effect between the shell 302, the movable end outer tube sheet 305 and the movable end inner tube sheet 304.

Claims

1. A stainless steel double-tube double-tube sheet floating heat exchanger, comprising an air inlet tube box (1) and a fixed end outer tube sheet (2), characterized in that: The fixed end outer tube sheet (2) is fixedly arranged on the right side of the air inlet pipe box (1); a heat exchange assembly (3) is arranged on the right side of the fixed end outer tube sheet (2); the heat exchange assembly (3) comprises a fixed end inner tube sheet (301) arranged on the right side of the fixed end outer tube sheet (2); a shell (302) is fixedly arranged on the right side of the fixed end inner tube sheet (301); an inner cylinder (303) is fixedly arranged inside the shell (302); a movable end inner tube sheet (304) is fixedly arranged on the right side of the shell (302); a movable end outer tube sheet (305) is arranged on the right side of the movable end inner tube sheet (304); and an air outlet pipe box (306) is fixedly arranged on the right side of the movable end outer tube sheet (305); The fixed end inner tube sheet (301) and the movable end inner tube sheet (304) are in a parallel design state, and the fixed end inner tube sheet (301) and the movable end inner tube sheet (304) are in an expansion connection design with the external cooling tube (4); The fixed end outer tube sheet (2) and the movable end outer tube sheet (305) are in a parallel design state, and the fixed end outer tube sheet (2) and the movable end outer tube sheet (305) are connected to the inner cooling tube (5) by welding and expansion connection; The inner cylinder (303) has a floating structure, the outer cooling tube (4) and the inner cooling tube (5) are connected by expansion joint, and the inner diameter of the outer cooling tube (4) is larger than the outer diameter of the inner cooling tube (5), and a concave inner cavity is designed between the fixed end outer tube sheet (2) and the fixed end inner tube sheet (301) and between the movable end outer tube sheet (305) and the movable end inner tube sheet (304).

2. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 1, characterized in that: The fixed end outer tube sheet (2) and the fixed end inner tube sheet (301) are connected by welding, and the movable end outer tube sheet (305) and the movable end inner tube sheet (304) are connected by welding.

3. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 1 is characterized in that: An external cooling pipe (4) is arranged inside the inner cylinder (303), and an internal cooling pipe (5) is arranged inside the external cooling pipe (4).

4. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 1, characterized in that: A partition plate (6) is fixedly arranged inside the inner cylinder (303), the partition plate (6) and the outer cooling tube (4) are designed to be vertically intersected, and the partition plate (6) is fixedly sleeved on the outside of the outer cooling tube (4).

5. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 1, characterized in that: A pressing ring (7) is sleeved on the right side of the outer side of the shell (302), and the side cross-section of the inner side of the pressing ring (7) is larger than the side cross-sections of the outer tube sheet (305) at the movable end and the inner tube sheet (304) at the movable end.

6. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 3, characterized in that: Four grooves (8) are integrally provided inside the outer cooling tube (4), and the cross section of the groove (8) is designed to be semicircular in direction when viewed from the side.

7. The stainless steel double-tube double-tube sheet floating heat exchanger according to claim 6, characterized in that: The four grooves (8) are designed to be distributed around the center of the outer cooling tube (4), and the angle between any two of the grooves (8) is 90 degrees.

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