A shell-and-tube heat exchanger

Abstract

The utility model relates to heat exchanger technical field, concretely is a kind of shell-and-tube heat exchanger, including pipe body, the plug head cover is equipped in both ends of pipe body, several U-shaped tubes are equipped in the inside of pipe body, several staggered baffles are equipped on U-shaped tube, the connecting flange is equipped in both ends of pipe body outer wall, the insertion slot is opened in both ends of pipe body, arc slot is symmetrically equipped in insertion slot;The shell-and-tube heat exchanger, by setting two plug head cover and pipe body insertion joint, and in junction through the sealing ring with two sealing rubber rings and insertion slot insertion joint, sealing rubber ring and arc slot correspond to insertion joint, increase the sealing property of junction, under the cooperation of connecting flange and flange ring, by fastening bolt connection, increase the stability of combination, long-term heat exchange use, when needing to clean inside scale, two plug head cover are respectively disassembled and opened, clean inside fully, reduce pipe body too long, only one end opening cleaning not in place influence sustained heat exchange use.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, also known as tubular heat exchangers, are indirect heat exchangers that use the walls of tube bundles enclosed in a shell as the heat transfer surface. Their core structure consists of components such as the shell, tube bundles, tube sheets, and baffles. Typically, shell-and-tube heat exchangers with U-shaped tube bundles inside only have one end sealed and opened for internal cleaning. Over time, scale can easily build up on the inner wall of the tubes and shell, but it is not convenient to clean the inside thoroughly. Furthermore, with both ends sealed, the sealing at the connection point cannot be improved. Repeated opening and closing for internal cleaning can cause the seal to become loose, affecting the heat exchange function. Summary of the Invention The purpose of this invention is to provide a shell-and-tube heat exchanger to solve the problems mentioned in the background art.

[0003] To achieve the above objectives, this utility model provides the following technical solution: A shell-and-tube heat exchanger includes a tube body with end caps at both ends, a plurality of U-shaped tubes inside the tube body, a plurality of staggered baffles on the U-shaped tubes, connecting flanges at both ends of the outer wall of the tube body, and slots at both ends of the tube body, with symmetrical arc-shaped grooves in each slot. Both of the plug caps are provided with sealing rings corresponding to the slots, and sealing rubber rings are symmetrically provided on the outer walls of the sealing rings. A flange ring is provided on the outer wall of the plug cap corresponding to the connecting flange. The plug on the left side has a partition plate inside, a hot water outlet pipe on the upper part of the outer wall of the plug, a cold water inlet pipe on the lower part of the outer wall of the plug, and a snap-fit ​​plate symmetrical to the end of the partition plate inside the plug. The snap-fit ​​plate has a snap-fit ​​groove in the middle, and a sealing gasket is provided in the snap-fit ​​groove.

[0004] Furthermore, a support plate is symmetrically provided at the bottom of the outer wall of the tube, and the top of the support plate is welded and fixed to the outer wall of the tube.

[0005] In this invention, the two support plates work together to support the entire device, increasing its overall independent stability.

[0006] Specifically, each of the connecting flanges has several fixing holes, the connecting flanges and the pipe body are integrally formed, the outer wall of the pipe body is provided with a water outlet pipe, the lower part of the outer wall of the pipe body is provided with a water inlet pipe, the water outlet pipe and the water inlet pipe are integrally formed with the pipe body, and the water outlet pipe and the water inlet pipe are connected to the internal space of the pipe body.

[0007] In this invention, the installation of the inlet pipe facilitates the entry of hot material into the U-shaped tube, while the outlet pipe facilitates the discharge of cooled hot material from inside the tube, thus maintaining continuous heat exchange within the tube.

[0008] It should be noted that the U-shaped tubes are evenly spaced, the baffles are semi-circular, and the outer walls of the baffles are bonded and fixed to the corresponding inner walls of the tubes.

[0009] In this invention, the combination of multiple baffles increases the path through which hot materials flow inside the tube, which helps to fully increase the contact time between the U-shaped tube and the hot materials, and to heat the materials that need heat exchange passing through the U-shaped tube.

[0010] Specifically, the flange ring and the plug cover are integrally formed. The flange ring has several positioning holes, each of which is equipped with a fastening bolt. The sealing ring and the plug cover are integrally formed. The width of the outer wall of the sealing ring is adapted to the width of the inner wall of the slot. The sealing rubber ring is engaged with the mounting groove on the sealing ring. The outer diameter of the sealing rubber ring is adapted to the width of the inner wall of the arc groove.

[0011] In this invention, the flange ring is fitted with multiple positioning holes. The fastening bolts pass through the positioning holes and exit through the fixing holes on the corresponding connecting flanges. The ends of the fastening bolts are connected by nuts to achieve the combination and fixation of the plug cap and the pipe body. The sealing ring and the slot are inserted and fitted accordingly. With the cooperation of two sealing rubber rings, the sealing rubber rings and the arc groove are tightly fitted and snapped together, increasing the tightness of the installation of the two plug caps.

[0012] It is worth noting that the hot water outlet pipe and the cold water inlet pipe are integrally formed with the corresponding plug caps on the left side, the snap-fit ​​plate is integrally formed with the corresponding plug caps on the left side, and the partition plate is integrally formed with the corresponding plug caps on the left side.

[0013] In this utility model, the partition plate divides the inside of the left end cap into two compartments. The material that needs heat exchange is transported from the lower compartment to the cold water inlet pipe, passes through the U-shaped tube for heat exchange, enters the upper compartment, and is then discharged from the hot water outlet pipe, thus achieving the corresponding heat exchange coordination.

[0014] Furthermore, the outer diameter of the sealing gasket is adapted to the inner diameter of the snap-fit ​​groove, a pipe hole is opened on the sealing gasket at the position corresponding to the U-shaped tube port, and a groove is opened on the sealing gasket at the position corresponding to the partition plate.

[0015] In this invention, the sealing gasket plate is fitted with a pipe hole to achieve the insertion and fit of the U-shaped pipe end with the pipe hole, and the end is glued and fixed to the sealing gasket plate, so that the two compartments on both sides of the left end cap are connected to the two ends of the U-shaped pipe respectively. With the fit of the groove, the sealing gasket plate and the partition plate are tightly inserted and fitted, and the insertion point is sealed by a sealing gasket.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model features two end caps that fit into the tube body, and a sealing ring with two sealing rubber rings that fits into the slot at the junction. The sealing rubber rings and the arc-shaped groove are inserted into each other to increase the sealing of the connection. With the cooperation of the connecting flange and the flange ring, the connection is made by fastening bolts to increase the stability of the assembly. For long-term heat exchange use, when internal scaling needs to be cleaned, the two end caps can be disassembled and opened to thoroughly clean the inside, reducing the impact of insufficient cleaning at only one end of the tube body due to its excessive length, which would affect continuous heat exchange use.

[0017] This invention increases the path of heat exchange materials by setting multiple U-shaped tubes and using baffles, thereby increasing the contact time with the U-shaped tubes. The left end cap is fitted with a partition plate and a sealing gasket to separate two chambers connected to both ends of the U-shaped tubes. With the cooperation of hot water outlet pipe and cold water inlet pipe, the materials that need heat exchange can be passed through the U-shaped tubes for heat exchange. The sealing gasket separates the end cap from the internal space of the tube body, reducing mutual interference. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the detachable plug cover structure of this utility model; Figure 3 This is a schematic diagram of the combined structure of the end cap and partition plate of this utility model; Figure 4 This is a schematic diagram of the sealing gasket structure of this utility model; Figure 5 This is a schematic diagram of the tube structure of this utility model; Figure 6 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0019] The meanings of the labels in the diagram are as follows: 1. Pipe body; 10. Connecting flange; 100. Fixing hole; 11. Outlet pipe; 12. Inlet pipe; 13. Raised ring; 14. Slot; 140. Arc groove; 15. U-shaped pipe; 150. Baffle plate; 2. End cap; 20. Flange ring; 200. Locating hole; 201. Fastening bolt; 21. Snap-fit ​​plate; 210. Snap-fit ​​groove; 22. Sealing gasket; 220. Pipe hole; 221. Groove; 23. Divider plate; 24. Hot water outlet pipe; 25. Cold water inlet pipe; 26. Sealing ring; 260. Sealing rubber ring; 3. Support plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-6 This embodiment provides a technical solution: A shell-and-tube heat exchanger includes a tube body 1, with support plates 3 symmetrically arranged at the bottom of the outer wall of the tube body 1, and the top of the support plates 3 being welded and fixed to the outer wall of the tube body 1.

[0022] In this invention, the two support plates 3 work together to support the entire device, increasing its overall independent stability.

[0023] Furthermore, both ends of the pipe body 1 are provided with end caps 2, and the inside of the pipe body 1 is provided with several U-shaped tubes 15. Several staggered baffles 150 are provided on the U-shaped tubes 15. The U-shaped tubes 15 are evenly distributed, and the baffles 150 are semi-circular. The outer walls of the baffles 150 are respectively bonded and fixed to the corresponding inner wall surfaces of the pipe body 1.

[0024] In this invention, the cooperation of multiple baffles 150 increases the path through which hot material flows inside the tube 1, which helps to fully increase the contact time between the U-shaped tube 15 and the hot material, and to heat the material that needs heat exchange passing through the U-shaped tube 15.

[0025] Specifically, both ends of the outer wall of the pipe body 1 are provided with connecting flanges 10, and several fixing holes 100 are opened on the connecting flanges 10. The connecting flanges 10 and the pipe body 1 are integrally formed. The outer wall of the pipe body 1 is provided with an outlet pipe 11, and the lower part of the outer wall of the pipe body 1 is provided with an inlet pipe 12. The outlet pipe 11 and the inlet pipe 12 are integrally formed with the pipe body 1, and the outlet pipe 11 and the inlet pipe 12 are connected to the internal space of the pipe body 1.

[0026] In this utility model, the installation of the inlet pipe 12 facilitates the entry of hot material from the heating U-shaped tube 15 into the tube body 1, and the outlet pipe 11 facilitates the discharge of cooled hot material from the tube body 1, thus maintaining continuous heat exchange inside the tube body 1.

[0027] Secondly, slots 14 are provided at both ends of the tube body 1, and arc-shaped grooves 140 are symmetrically provided in each slot 14. It should be noted that sealing rings 26 are provided on both end caps 2 at the positions corresponding to slots 14, and sealing rubber rings 260 are symmetrically provided on the outer walls of the sealing rings 26. Flange rings 20 are provided on the outer walls of the end caps 2 at the positions corresponding to the connecting flanges 10. Furthermore, the left end cap 2 has a partition plate 23 inside, a hot water outlet pipe 24 is provided on the upper part of the outer wall of the end cap 2, a cold water inlet pipe 25 is provided on the lower part of the outer wall of the end cap 2, and a snap-fit ​​plate 21 is provided symmetrically with the end of the partition plate 23 inside the end cap 2. A snap-fit ​​groove 210 is provided in the middle of the snap-fit ​​plate 210, and a sealing gasket 22 is provided in the snap-fit ​​groove 210.

[0028] It is worth noting that the flange ring 20 and the plug cover 2 are integrally formed. The flange ring 20 has several positioning holes 200, and each positioning hole 200 is equipped with a fastening bolt 201. The sealing ring 26 and the plug cover 2 are integrally formed. The width of the outer wall of the sealing ring 26 is adapted to the width of the inner wall of the slot 14. The sealing rubber ring 260 is engaged with the mounting groove on the sealing ring 26. The outer diameter of the sealing rubber ring 260 is adapted to the width of the inner wall of the arc groove 140.

[0029] In this utility model, the flange ring 20 is fitted with multiple positioning holes 200, and the fastening bolt 201 passes through the positioning holes 200 and exits from the fixing hole 100 on the corresponding connecting flange 10. The end of the fastening bolt 201 is connected by a nut to realize the combination and fixation of the plug cover 2 and the pipe body 1. The sealing ring 26 is inserted into the slot 14 and, with the cooperation of the two sealing rubber rings 260, the sealing rubber rings 260 and the arc groove 140 are tightly fitted and snapped together, increasing the tightness of the installation of the two plug covers 2.

[0030] Specifically, the hot water outlet pipe 24 and the cold water inlet pipe 25 are integrally formed with the corresponding plug cap 2 on the left side, the snap-fit ​​plate 21 is integrally formed with the corresponding plug cap 2 on the left side, and the partition plate 23 is integrally formed with the corresponding plug cap 2 on the left side.

[0031] In this utility model, the partition plate 23 divides the interior of the left end cap 2 into two compartments. The material that needs heat exchange is transported from the lower compartment to the cold water inlet pipe 25, passes through the U-shaped pipe 15 for heat exchange, enters the upper compartment, and is discharged from the hot water outlet pipe 24, thus achieving the corresponding heat exchange coordination.

[0032] In addition, the outer diameter of the sealing gasket 22 is adapted to the inner diameter of the snap-fit ​​groove 210, and a pipe hole 220 is opened on the sealing gasket 22 at the position corresponding to the port of the U-shaped tube 15, and a groove 221 is opened on the sealing gasket 22 at the position corresponding to the partition plate 23.

[0033] In this utility model, the sealing gasket 22 is fitted with the pipe hole 220 to realize the insertion and engagement of the U-shaped tube 15 end with the pipe hole 220, and the end is glued and fixed to the sealing gasket 22, so that the two chambers on both sides of the left end cap 2 are connected to the two ends of the U-shaped tube 15 respectively. With the cooperation of the groove 221, the sealing gasket 22 and the partition plate 23 are tightly inserted and engaged, and the insertion point is sealed by the sealing gasket.

[0034] The inner wall of the tube body 1 is provided with protruding rings 13 at both ends. The protruding ring 13 on the left side is closely fitted to the right side of the sealing gasket 22. Under the pressing action of the protruding ring 13, the position of the sealing gasket 22 is fixed, increasing the tightness of the combination between the sealing gasket 22 and the snap-fit ​​plate 21. In addition, a vacuum interlayer is provided between the inner and outer walls of the tube body 1 and the plug cap 2 to increase the heat insulation of the tube body 1 and the plug cap 2 and reduce the impact of heat dissipation.

[0035] In this embodiment of the shell-and-tube heat exchanger, when in use, multiple U-shaped tubes 15 with baffles 150 are first combined and fixed with the tube body 1 with support plate 3. Then, the sealing gasket 22 is combined and fixed with the end cap 2 with partition plate 23. The sealing gasket 22 is inserted into the snap-fit ​​groove 210. The ends of the U-shaped tubes 15 are inserted into the corresponding tube holes 220. The two end caps 2 are inserted into the slots 14 through sealing rings 26. The two sealing rubber rings 260 on the sealing rings 26 are inserted into the corresponding arc grooves 140. The end of the convex ring 13 is in close contact with the sealing gasket 22 to increase the sealing performance of the sealing gasket 22 and the snap-fit ​​plate 21. Finally, the fastening bolts 201 are passed through the positioning hole 200 and the fixing hole 100 in sequence to realize the combination and fixation of the two end caps 2 and the tube body 1. The hot material to be heated is guided from the inlet pipe 12 into the inside of the pipe body 1. With the cooperation of multiple baffles 150, the contact time of the hot material on the U-shaped pipe 15 is increased. The outlet pipe 11 is connected to the external pipe to recover the heated material. The material to be heated is then guided from the cold water inlet pipe 25 into the chamber below the plug cover 2. After passing through the U-shaped pipe 15 for heat exchange, it enters the chamber above the plug cover 2 and is then discharged from the hot water outlet pipe 24, thus achieving heat exchange coordination. When the inside of the tube body 1 needs to be cleaned after prolonged heat exchange, the outlet pipe 11, inlet pipe 12, hot water outlet pipe 24, cold water inlet pipe 25, and end nuts of fastening bolt 201 are removed to allow the two plug caps 2 to be removed separately. This allows for thorough cleaning of the internal contacts, increases the cleaning contact area, and reduces the impact of scale buildup on the internal structure. The assembly is convenient, and the sealing at the connection between the plug cap 2 and the tube body 1 is strong, reducing the impact of leakage.

Claims

1. A shell-and-tube heat exchanger, comprising a tube body (1), characterized in that: Both ends of the pipe body (1) are provided with end caps (2), and the inside of the pipe body (1) is provided with several U-shaped pipes (15). Several staggered baffles (150) are provided on the U-shaped pipes (15). Both ends of the outer wall of the pipe body (1) are provided with connecting flanges (10). Both ends of the pipe body (1) are provided with slots (14), and arc grooves (140) are symmetrically provided in the slots (14). Both of the plug caps (2) are provided with sealing rings (26) corresponding to the slots (14), and sealing rubber rings (260) are symmetrically provided on the outer wall of the sealing rings (26). Flange rings (20) are provided on the outer wall of the plug caps (2) corresponding to the connecting flanges (10). The plug cap (2) on the left side has a partition plate (23) inside. A hot water outlet pipe (24) is provided on the upper part of the outer wall of the plug cap (2). A cold water inlet pipe (25) is provided on the lower part of the outer wall of the plug cap (2). A snap-fit ​​plate (21) is provided symmetrically with the end of the partition plate (23) inside the plug cap (2). A snap-fit ​​groove (210) is provided in the middle of the snap-fit ​​plate (210). A sealing gasket (22) is provided in the snap-fit ​​groove (210).

2. The shell-and-tube heat exchanger according to claim 1, characterized in that: The bottom of the outer wall of the tube (1) is symmetrically provided with a support plate (3), and the top of the support plate (3) is welded and fixed to the outer wall of the tube (1).

3. The shell-and-tube heat exchanger according to claim 1, characterized in that: The connecting flange (10) is provided with several fixing holes (100). The connecting flange (10) and the pipe body (1) are integrally formed. The outer wall of the pipe body (1) is provided with a water outlet pipe (11). The lower part of the outer wall of the pipe body (1) is provided with a water inlet pipe (12). The water outlet pipe (11) and the water inlet pipe (12) are integrally formed with the pipe body (1). The water outlet pipe (11) and the water inlet pipe (12) are both connected to the internal space of the pipe body (1).

4. The shell-and-tube heat exchanger according to claim 1, characterized in that: The U-shaped tubes (15) are evenly spaced, the baffles (150) are semi-circular, and the outer walls of the baffles (150) are bonded and fixed to the inner walls of the tube body (1).

5. The shell-and-tube heat exchanger according to claim 1, characterized in that: The flange ring (20) and the plug cap (2) are integrally formed. The flange ring (20) has several positioning holes (200), and each positioning hole (200) is provided with a fastening bolt (201). The sealing ring (26) and the plug cap (2) are integrally formed. The width of the outer wall of the sealing ring (26) is adapted to the width of the inner wall of the slot (14). The sealing rubber ring (260) is engaged with the mounting groove on the sealing ring (26). The outer diameter of the sealing rubber ring (260) is adapted to the width of the inner wall of the arc groove (140).

6. The shell-and-tube heat exchanger according to claim 1, characterized in that: The hot water outlet pipe (24) and the cold water inlet pipe (25) are integrally formed with the corresponding plug cap (2) on the left side, the snap-fit ​​plate (21) is integrally formed with the corresponding plug cap (2) on the left side, and the partition plate (23) is integrally formed with the corresponding plug cap (2) on the left side.

7. The shell-and-tube heat exchanger according to claim 1, characterized in that: The outer diameter of the sealing gasket (22) is adapted to the inner diameter of the snap-fit ​​groove (210). A pipe hole (220) is opened on the sealing gasket (22) at the position corresponding to the port of the U-shaped tube (15). A groove (221) is opened on the sealing gasket (22) at the position corresponding to the partition plate (23).

Images