Double-pipe heat exchanger with heat insulation anti-freezing protection structure

Abstract

The utility model relates to the technical field of double-pipe heat exchangers, and discloses a double-pipe heat exchanger with a heat insulation anti-freezing protection structure, which comprises an outer pipe, an inner pipe arranged in the outer pipe, a connector communicated with one end of the outer pipe, a water inlet communicated with the upper part of the connector, and a connecting assembly arranged between the outer pipe and the inner pipe, the connecting assembly comprises a filtering mechanism arranged on the upper portion of a connector, an anti-freezing mechanism is arranged in the outer pipe, a cleaning brush makes contact with a filtering hole of a filtering cylinder, a positioning block is fixedly connected with the filtering cylinder, a bolt is in threaded connection with a threaded groove, and the outer wall of an interlayer is fixedly connected with the outer wall of the inner pipe. The thickness of the heat insulation layer is twice that of the PPR material layer. The problems that an existing device cannot filter added water, impurities in the water are prone to being attached to the outer wall of the inner pipe after long-time use, and therefore the heat exchange effect is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shell-and-tube heat exchangers, in particular to a shell-and-tube heat exchanger with a heat insulation and anti-freezing protection structure. Background Technique

[0002] The shell-and-tube heat exchanger is one of the most widely used heat exchangers in current petrochemical production. Name: Shell-and-tube heat exchanger; Definition: It is composed of concentric sleeves connected by two standard pipes with different sizes. The outer one is called the shell side, and the inner one is called the tube side. Two different media can flow reversely (or in the same direction) in the shell side and the tube side to achieve the heat exchange effect.

[0003] According to a shell-and-tube heat exchanger disclosed in the patent publication number CN 216770275 U, this device has low processing and assembly difficulty, reliable performance, and effectively ensures the water flow rate; however, this device cannot filter the added water. After long-term use, impurities in the water are likely to adhere to the outer wall of the inner tube, thus affecting the heat exchange effect.

[0004] Therefore, we have proposed a shell-and-tube heat exchanger with a heat insulation and anti-freezing protection structure to solve the problem. Content of the Utility Model

[0005] The purpose of the utility model is to provide a shell-and-tube heat exchanger with a heat insulation and anti-freezing protection structure, which solves the problems mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A shell-and-tube heat exchanger with a heat insulation and anti-freezing protection structure, including an outer tube;

[0007] An inner tube arranged inside the outer tube;

[0008] A connector connected to one end of the outer tube;

[0009] An inlet connected to the upper part of the connector;

[0010] And a connection component arranged between the outer tube and the inner tube. The connection component includes a filtering mechanism arranged on the upper part of the connector, and an anti-freezing mechanism is arranged inside the outer tube.

[0011] Preferably, the filtering mechanism includes a mounting ring fixedly installed on the inner wall of the water inlet. A sealing ring is fixedly connected to the upper part of the mounting ring. A filter cylinder is arranged inside the water inlet. A mounting rod is fixedly installed on the inner wall of the filter cylinder. The mounting rod is rotatably connected to a rotating shaft through a bearing. A propeller is fixedly connected to the top end of the rotating shaft. A rotating rod is fixedly connected to the bottom end of the rotating shaft. A cleaning brush is fixedly connected to the bottom of the rotating rod. A positioning groove is formed at the top of the inner wall of the water inlet. A positioning block is clamped in the inner wall of the positioning groove. A groove is formed at the top of the positioning block. A threaded hole is formed in the inner wall of the groove. A bolt is threadedly connected to the inner wall of the hole. A threaded groove is formed at the bottom of the inner wall of the positioning groove.

[0012] Preferably, the anti-freezing mechanism includes a partition layer fixedly connected to the inner wall of the outer pipe. A water passing gap is formed inside the partition layer. A PPR material layer is arranged inside the outer pipe. A heat insulation layer is fixedly connected to one side of the PPR material layer.

[0013] Preferably, the cleaning brush contacts the filter holes of the filter cylinder. The water added into the outer pipe can be filtered through the filter cylinder, so as to prevent impurities in the water from adhering to the outer wall of the inner pipe, and further improve the heat exchange effect of the device. At the same time, through the cooperation of the mounting rod, the rotating shaft, the propeller and the rotating rod, the cleaning brush can self-clean the filter cylinder, so as to prevent the filter holes of the filter cylinder from being blocked and affecting the water filtering effect.

[0014] Preferably, the positioning block is fixedly connected to the filter cylinder. The bolt is threadedly connected to the threaded groove. Through the cooperation of the positioning block, the positioning groove, the bolt and the threaded groove, it is convenient for manual disassembly of the filter cylinder, so as to facilitate manual deep cleaning of the filter cylinder, and further improve the filtering effect of the filter cylinder.

[0015] Preferably, the outer wall of the partition layer is fixedly connected to the outer wall of the inner pipe. Through the cooperation of the partition layer and the water passing gap, different heat transfer chambers can be divided, and the partition layer is made of a heat insulating material or a material with a low heat conduction coefficient to reduce heat loss and improve the heat exchange efficiency. And through the cooperation of the PPR material layer and the heat insulation layer, the outer pipe can have a good anti-freezing effect.

[0016] Preferably, the thickness of the heat insulation layer is twice the thickness of the PPR material layer.

[0017] The utility model provides a casing heat exchanger with a heat insulation and anti-freezing protection structure. The casing heat exchanger with the heat insulation and anti-freezing protection structure has the following beneficial effects:

[0018] (1). The tubular heat exchanger with a heat insulation and anti-freezing protection structure is provided with a filtering mechanism. The water added into the outer pipe can be filtered through the filter cylinder, so as to prevent impurities in the water from adhering to the outer wall of the inner pipe, thereby making the heat exchange effect of the device better. At the same time, under the action of the mounting rod, the rotating shaft, the propeller and the rotating rod, the cleaning brush can self-clean the filter cylinder, so as to prevent the filter holes of the filter cylinder from being blocked and affecting the water filtering effect. Under the action of the positioning block, the positioning groove, the bolt and the threaded groove, it is convenient for manual disassembly of the filter cylinder, so as to facilitate manual deep cleaning of the filter cylinder, and thus a better filtering effect can be achieved for the filter cylinder;

[0019] (2). The tubular heat exchanger with a heat insulation and anti-freezing protection structure is provided with an anti-freezing mechanism. Under the action of the interlayer and the water passing gap, different heat transfer chambers can be divided, and the interlayer is made of heat insulating materials or materials with low thermal conductivity to reduce heat loss and improve heat exchange efficiency. And under the action of the PPR material layer and the heat insulation layer, the outer pipe can have a good anti-freezing effect. Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the partial overall sectional structure of the present utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the filtering mechanism of the present utility model;

[0023] Figure 4 It is a schematic diagram of the partial structure of the filtering mechanism of the present utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the anti-freezing mechanism of the present utility model;

[0025] Figure 6 It is a schematic diagram of the partial structure of the anti-freezing mechanism of the present utility model;

[0026] In the figure: 1. Outer pipe; 2. Connector; 3. Connection assembly; 31. Filtering mechanism; 311. Mounting ring; 312. Sealing ring; 313. Filter cylinder; 314. Mounting rod; 315. Rotating shaft; 316. Propeller; 317. Rotating rod; 318. Cleaning brush; 319. Positioning groove; 3110. Threaded groove; 3111. Positioning block; 3112. Bolt; 3113. Groove; 32. Anti-freezing mechanism; 321. Interlayer; 322. Water passing gap; 323. PPR material layer; 324. Heat insulation layer; 4. Inner pipe; 5. Water inlet. Detailed Description of the Preferred Embodiment

[0027] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings.

[0028] Embodiment 1

[0029] As Figure 1-6 shown, the present utility model provides a technical solution: a casing heat exchanger with a heat insulation and anti-freezing protection structure, including an outer tube 1, an inner tube 4 disposed inside the outer tube 1, a connector 2 communicatively disposed at one end of the outer tube 1, a water inlet 5 communicatively disposed above the connector 2, and a connection assembly 3 disposed between the outer tube 1 and the inner tube 4. The connection assembly 3 includes a filtering mechanism 31 disposed above the connector 2, and an anti-freezing mechanism 32 disposed inside the outer tube 1. The filtering mechanism 31 includes a mounting ring 311 fixedly installed on the inner wall of the water inlet 5. A sealing ring 312 is fixedly connected to the upper part of the mounting ring 311. A filter cylinder 313 is disposed inside the water inlet 5. A mounting rod 314 is fixedly installed on the inner wall of the filter cylinder 313. The mounting rod 314 is rotatably connected to a rotating shaft 315 through a bearing. A propeller 316 is fixedly connected to the top end of the rotating shaft 315. A rotating rod 317 is fixedly connected to the bottom end of the rotating shaft 315. A cleaning brush 318 is fixedly connected to the bottom of the rotating rod 317. A positioning groove 319 is formed at the top of the inner wall of the water inlet 5. A positioning block 3111 is clamped on the inner wall of the positioning groove 319. A groove 3113 is formed at the top of the positioning block 3111. A threaded hole is formed in the inner wall of the groove 3113, and a bolt 3112 is threadedly connected to the inner wall of the hole. A threaded groove 3110 is formed at the bottom of the inner wall of the positioning groove 319.

[0030] In this embodiment, the cleaning brush 318 contacts the filter holes of the filter cylinder 313. The water added into the outer tube 1 can be filtered through the filter cylinder 313, thereby preventing impurities in the water from adhering to the outer wall of the inner tube 4, and further improving the heat exchange effect of the device. At the same time, through the cooperation of the mounting rod 314, the rotating shaft 315, the propeller 316, and the rotating rod 317, the cleaning brush 318 can self-clean the filter cylinder 313, thereby preventing the filter holes of the filter cylinder 313 from being blocked and affecting the water filtration effect.

[0031] Furthermore, the positioning block 3111 is fixedly connected to the filter cylinder 313, and the bolt 3112 is threadedly connected to the threaded groove 3110. Through the cooperation of the positioning block 3111, the positioning groove 319, the bolt 3112, and the threaded groove 3110, it is convenient for manual disassembly of the filter cylinder 313, thereby facilitating manual in-depth cleaning of the filter cylinder 313, and thus achieving a better filtering effect on the filter cylinder 313.

[0032] When the device is filled with water, first, an external water pipe is sleeved outside the water inlet 5. Subsequently, water can be introduced between the outer pipe 1 and the inner pipe 4. And when the water flow passes through the water inlet 5, under the action of the filter cylinder 313, the water added into the outer pipe 1 can be filtered, thereby preventing impurities in the water from adhering to the outer wall of the inner pipe 4, and further enabling the heat exchange effect of the device to be better. Further, under the action of the water flow, the propeller 316 can rotate, thereby enabling the rotating shaft 315 to rotate, and further enabling the rotating rod 317 fixedly connected to the bottom end of the rotating shaft 315 to rotate, so that the cleaning brush 318 fixedly connected to the bottom of the rotating rod 317 can self-clean the filter cylinder 313, thereby preventing the filter holes of the filter cylinder 313 from being blocked and affecting the water filtration effect. Further, when the filter cylinder 313 needs to be disassembled, only by manually rotating the bolt 3112 counterclockwise to separate the bolt 3112 from the thread groove 3110, and then the filter cylinder 313 can be taken out upward manually, which is convenient for manual in-depth cleaning of the filter cylinder 313, and thus a better filtration effect can be achieved on the filter cylinder 313.

[0033] Embodiment 2

[0034] On the basis of Embodiment 1, a preferred embodiment of the tubular heat exchanger with a heat insulation and anti-freezing protection structure provided by the present utility model is as Figures 1 to 6 shown: The anti-freezing mechanism 32 includes a partition layer 321 fixedly connected to the inner wall of the outer pipe 1. A water passing gap 322 is formed inside the partition layer 321. A PPR material layer 323 is arranged inside the outer pipe 1. One side of the PPR material layer 323 is fixedly connected with a heat insulation layer 324.

[0035] In this embodiment, the outer wall of the partition layer 321 is fixedly connected to the outer wall of the inner pipe 4. Through the cooperation of the partition layer 321 and the water passing gap 322, different heat transfer cavities can be divided, and the partition layer 321 is made of an adiabatic material or a material with a low thermal conductivity coefficient to reduce heat loss and improve the heat exchange efficiency. And through the cooperation of the PPR material layer 323 and the heat insulation layer 324, the outer pipe 1 can have a good anti-freezing effect.

[0036] Further, the thickness of the heat insulation layer 324 is twice the thickness of the PPR material layer 323.

[0037] After the water flow enters the outer pipe 1, under the action of the partition layer 321 and the water passing gap 322, different heat transfer cavities can be divided, and the partition layer 321 is made of an adiabatic material or a material with a low thermal conductivity coefficient to reduce heat loss and improve the heat exchange efficiency. And because the PPR material layer 323 is arranged inside the outer pipe 1, a good anti-freezing effect can be achieved. At the same time, through the heat insulation layer 324 arranged inside the outer pipe 1, a good heat insulation effect can be achieved, thereby further reducing heat loss and improving the heat exchange efficiency.

[0038] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shell-and-tube heat exchanger with a heat insulation and antifreeze protection structure, comprising an outer tube (1); An inner tube (4) disposed inside the outer tube (1); Connecting to a connector (2) disposed at one end of the outer tube (1); Connected to a water inlet (5) disposed on the upper portion of the connector (2); and a connecting assembly (3) arranged between the outer tube (1) and the inner tube (4), characterized in that: The connection assembly (3) comprises a filtering mechanism (31) arranged on the upper part of the connection head (2), and an antifreeze mechanism (32) is arranged inside the outer tube (1).

2. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 1 is characterized in that: The filtering mechanism (31) comprises a mounting ring (311) fixedly mounted on the inner wall of the water inlet (5); a sealing ring (312) is fixedly connected to the upper part of the mounting ring (311); a filter cartridge (313) is arranged inside the water inlet (5); a mounting rod (314) is fixedly mounted on the inner wall of the filter cartridge (313); the mounting rod (314) is rotatably connected to a rotating shaft (315) via a bearing; a propeller (316) is fixedly connected to the top end of the rotating shaft (315); and a screw (316) is fixedly mounted on the bottom end of the rotating shaft (315). A rotating rod (317) is connected, a cleaning brush (318) is fixedly connected to the bottom of the rotating rod (317), a positioning groove (319) is provided at the top of the inner wall of the water inlet (5), a positioning block (3111) is clamped on the inner wall of the positioning groove (319), a groove (3113) is provided at the top of the positioning block (3111), a threaded hole is provided on the inner wall of the groove (3113), a bolt (3112) is threadedly connected to the inner wall of the hole, and a threaded groove (3110) is provided at the bottom of the inner wall of the positioning groove (319).

3. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 1 is characterized in that: The antifreeze mechanism (32) comprises a barrier layer (321) fixedly connected to the inner wall of the outer tube (1), a water-passing gap (322) being provided inside the barrier layer (321), a PPR material layer (323) being provided inside the outer tube (1), and a heat insulation layer (324) being fixedly connected to one side of the PPR material layer (323).

4. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 2 is characterized in that: The cleaning brush (318) is in contact with the filter holes of the filter cartridge (313).

5. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 2, characterized in that: The positioning block (3111) is fixedly connected to the filter cartridge (313), and the bolt (3112) is threadedly connected to the thread groove (3110).

6. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 3 is characterized in that: The outer wall of the partition (321) is fixedly connected to the outer wall of the inner tube (4).

7. The shell and tube heat exchanger with thermal insulation and antifreeze protection structure according to claim 3 is characterized in that: The thickness of the heat insulation layer (324) is twice the thickness of the PPR material layer (323).

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