CN218066097U - Double-tube-plate heat exchanger structure suitable for medium-pressure working condition - Google Patents
Double-tube-plate heat exchanger structure suitable for medium-pressure working condition Download PDFInfo
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- CN218066097U CN218066097U CN202222107533.2U CN202222107533U CN218066097U CN 218066097 U CN218066097 U CN 218066097U CN 202222107533 U CN202222107533 U CN 202222107533U CN 218066097 U CN218066097 U CN 218066097U
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Abstract
The utility model provides a double-tube-plate heat exchanger structure suitable for medium pressure operating mode belongs to heat exchanger technical field. The utility model comprises a heat exchange tube, an outer tube plate and an inner tube plate; the outer tube plate and the tube pass end of the heat exchange tube adopt a connection mode of strength welding and stick expansion; the inner tube plate is provided with a plurality of expansion joint notches which are annularly arranged along the circumferential direction of the inner tube plate, the shell side end of the heat exchange tube is provided with a bulge which is annularly arranged along the circumferential direction of the heat exchange tube, and the bulge is in expansion joint with the expansion joint notches; the surface roughness in the expansion joint notch is more than 1.6Ra. The utility model discloses a set up the bulge expanded joint on expanded joint notch and the heat exchange tube on the interior tube sheet to make the expanded joint area increase, thereby increased the pressure resistance of junction.
Description
Technical Field
The utility model relates to a heat exchanger technical field especially relates to a double tube sheet heat exchanger structure suitable for middling pressure operating mode, and its pressure bearing scope is between 2.0MPa ~ 9.9 MPa.
Background
The heat exchanger is common in our lives, is a device for transferring partial heat of hot fluid to cold fluid, and is widely used in industries such as chemical industry and petroleum industry.
In the design of the heat exchanger, the mixing of materials in the tube shell process can have serious consequences, so that the process performance of a process system can not reach the expected index if the mixing is not successful, and explosion and other serious safety accidents occur if the mixing is unsuccessful. Therefore, how to prevent the mixing of the shell side materials of the heat exchanger tube is always a key element in the design of the heat exchanger. The shell side material mixing of the heat exchanger tube is basically caused by the leakage of two parts. The first is that the heat exchange tube itself is broken; the second is leakage at the joint of the heat exchange tube and the tube plate. The double-tube plate heat exchanger is designed to avoid the second condition, so that the double-tube plate heat exchanger is suitable for the working condition above 2.0 MPa.
The safety is a precondition that the chemical plant can be put into operation, so that the improvement of the safety of the whole plant by improving the safety of equipment in the plant is one of very effective means. As for the heat exchanger, the double-tube-plate heat exchanger is used for replacing a fixed tube-plate heat exchanger with a common structure, so that the safety of equipment can be obviously improved. The utility model discloses a grant publication number CN203824384U discloses a shell and tube heat exchanger. The technology adopts a radial topological method to arrange the heat exchange tubes, and the shell-side fluid uniformly flows through all the heat exchange tubes along the radial direction by matching with the annular baffle plates and the disc-shaped baffle plates which are alternately arranged, so that the utilization rate of the heat exchange tubes is improved. A shell-and-tube heat exchanger mainly comprises a cylinder body, tube plates, a tube box, heat exchange tubes and baffle plates, wherein the baffle plates are arranged alternately by adopting annular baffle plates and disc-shaped baffle plates, and the total number of the baffle plates is odd. The heat exchange tubes are arranged on concentric circles with different diameters and centered on the symmetry axis of the heat exchanger, and are uniformly distributed in the circumferential direction. The distance between the heat exchange tubes is not constant, and the minimum distance is more than or equal to 1.25 times of the outer diameter of the heat exchange tubes.
The invention patent with publication number CN101696860A discloses a double-tube-plate heat exchanger, which comprises a cylindrical barrel, wherein a shell-side medium inlet and a shell-side medium outlet are arranged on the barrel; the left channel box and the right channel box are respectively arranged at two ends of the cylinder body through channel box flanges, and at least one channel box is provided with a tube side medium outlet and a tube side medium inlet; the outer tube plates are arranged at two ends of the cylinder body and connected with the tube box flange; the inner tube plate is arranged on the inner side of the outer tube plate and connected with the barrel, and a liquid accumulation cavity is formed between the outer tube plate and the inner tube plate; the heat exchange tubes penetrate through the outer tube plate and the inner tube plate, two ends of each heat exchange tube are fixed on the outer tube plate respectively, the heat exchange tubes are connected with the inner tube plate in an expansion mode, and the heat exchange tubes and the outer tube plate are welded in an expansion mode.
The double-tube plate heat exchanger is basically applied to a low-pressure working condition (lower than 2.0 MPa), and the double-tube plate heat exchanger applied to more than 2.0MPa is basically not applied.
SUMMERY OF THE UTILITY MODEL
In view of this, for preventing that heat exchange tube and tube sheet junction from taking place to leak, and be applicable to the operating mode more than 2.0MPa, the utility model provides a double tube sheet heat exchanger structure suitable for middling pressure operating mode through set up the bulge expanded joint on expanded joint notch and the heat exchange tube on with interior tube sheet to make expanded joint area increase, thereby increased the compressive property of junction.
In order to solve the technical problem, the utility model provides a following technical scheme:
a double-tube-plate heat exchanger structure suitable for medium-pressure working conditions comprises a heat exchange tube, an outer tube plate and an inner tube plate;
the outer tube plate and the tube pass end of the heat exchange tube adopt a connection mode of strength welding and stick expansion;
the inner pipe plate is provided with a plurality of expansion joint notches which are annularly arranged along the circumferential direction of the inner pipe plate, the expansion joint notches are rectangular grooves, and the edges of the rectangular grooves are right angles;
the shell side end of the heat exchange tube is provided with a bulge annularly arranged along the circumferential direction of the heat exchange tube, and the bulge is in expanded connection with the expanded connection notch;
the surface roughness in the expansion joint notch is more than 1.6Ra.
Preferably, the width of the rectangular grooves is 10-13mm, the depth is 6mm, and the number of the rectangular grooves is 3-4.
Preferably, the heat exchange tube is made of a bright annealing tube.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model provides a double tube sheet heat exchanger structure suitable for middling pressure operating mode connects through the arch expand that will set up on the interior tube sheet on expanded joint notch and the heat exchange tube to make the expanded joint area increase, thereby increased the compressive property of junction, the pressure bearing scope is between 2.0MPa ~ 9.9MPa, and the expanded joint notch calculates according to general calculation method and reachs quantity and specification.
2. The utility model provides a double-tube-plate heat exchanger structure suitable for middling pressure operating mode, outer tube sheet adopt intensity to weld + paste and expand. The sealing performance of the heat exchange tube and the tube plate is ensured by the strength expansion, the influence of the vibration of the tube bundle on the welding seam of the tube head is reduced by the sticking expansion, and the service life of equipment is prolonged.
3. The utility model provides a double tube sheet heat exchanger structure suitable for middling pressure operating mode, the heat exchange tube adopts bright annealing pipe. The bright tube can enable the heat exchange tube to be better contacted with the notch when the heat exchange tube is expanded and connected with the inner tube plate, and the sealing property is enhanced. The expansion joint of the heat exchange tube and the inner tube plate is more effective in the annealing state, and the pulling-out force of the heat exchange tube is increased.
Drawings
FIG. 1 is a schematic view of the present invention;
in the figure, 1 is a heat exchange tube, 11 is a bulge, 2 is an outer tube plate, 21 is a tube side end, 3 is an inner tube plate, 31 is an expansion joint notch, 32 is a shell side end, and 4 is an isolation cavity.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a double-tube plate heat exchanger structure suitable for medium-pressure working condition, comprising a heat exchange tube 1, an outer tube plate 2 and an inner tube plate 3;
the outer tube plate 2 and the tube pass end 21 of the heat exchange tube 1 adopt a connection mode of strength welding and stick expansion;
a plurality of expansion joint notches 31 annularly arranged along the circumferential direction of the inner pipe plate are formed in the inner pipe plate 3, the expansion joint notches 31 are rectangular grooves, and the edges of the rectangular grooves are right angles;
the shell side end 32 of the heat exchange tube 1 is provided with a bulge 11 annularly arranged along the circumferential direction of the heat exchange tube 1, and the bulge 11 is in expanded connection with the expanded connection notch 31;
the surface roughness in the expansion joint notch 31 is more than 1.6Ra.
The pipe hole of interior tube sheet 3 is fluting structure (expanded joint notch), and fluting quantity, the width of groove, degree of depth carry out the independent calculation according to equipment pressure-bearing demand and heat exchange tube specification and confirm the utility model discloses in, the width of rectangular channel is 10-13mm, and the degree of depth is 6mm, and quantity is 3-4.
In the utility model, the heat exchange tube 1 is made of a bright annealing tube.
The utility model discloses in, outer tube sheet 2 and 1 connected mode of heat exchange tube are that intensity welds + pastes and expands, and interior tube sheet 3 is the intensity expanded joint with heat exchange tube 1. The length l of the heat exchange tube 1 extending out of the outer tube plate 2 is related to the specification of the heat exchange tube 1;
the expansion joint notch is an annular rectangular groove, and the edge of the expansion joint notch must be processed strictly according to a right angle;
the material of the outer tube sheet 2 and/or the inner tube sheet 3 is preferably heat treated. The tube sheet material adopts heat treatment process can adjust the performance of material through calculating, makes the tube sheet skill satisfy the required various mechanical properties requirement of equipment, also can satisfy the required hardness of intensity expanded joint, and heat treatment can select according to actual need the utility model discloses in do not do the special requirement.
When the device is in operation, the outer tube plate 2 is in contact with the medium at the tube side end 21 only, and the inner tube plate 3 is in contact with the medium at the shell side end 32 only. When the welding joint of the outer pipe plate 2 and the heat exchange pipe 1 leaks or the expansion contact between the inner pipe plate 3 and the heat exchange pipe 1 fails, so that the inner pipe plate 3 leaks, leaked media are discharged from the isolation cavity 4. Therefore, the condition that the equipment has no leakage can be judged through the pressure change in the isolation cavity 4; the medium discharged from the isolation chamber 4 can be used for judging which tube plate is leaked. Because the contact of the shell side material of the tube is possible to be contacted only when the contact of the inner tube plate and the outer tube plate with the heat exchange tube 1 is invalid, the safety performance of the double-tube plate heat exchanger greatly surpasses that of the common single-tube plate heat exchanger.
The above is only a preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (3)
1. A double-tube-plate heat exchanger structure suitable for medium-pressure working conditions is characterized by comprising a heat exchange tube, an outer tube plate and an inner tube plate;
the outer tube plate and the tube pass end of the heat exchange tube adopt a connection mode of strength welding and stick expansion;
the inner pipe plate is provided with a plurality of expansion joint notches which are annularly arranged along the circumferential direction of the inner pipe plate, the expansion joint notches are rectangular grooves, and the edges of the rectangular grooves are right angles;
the shell side end of the heat exchange tube is provided with a bulge annularly arranged along the circumferential direction of the heat exchange tube, and the bulge is in expanded connection with the expanded connection notch;
the surface roughness in the expansion joint notch is more than 1.6Ra.
2. A double tube sheet heat exchanger construction suitable for medium pressure applications as claimed in claim 1 wherein the rectangular slots are 10-13mm wide, 6mm deep and 3-4 in number.
3. The double tube sheet heat exchanger structure suitable for the medium pressure working condition according to claim 1 or 2, wherein the material of the heat exchange tube is a bright annealing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222107533.2U CN218066097U (en) | 2022-08-11 | 2022-08-11 | Double-tube-plate heat exchanger structure suitable for medium-pressure working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222107533.2U CN218066097U (en) | 2022-08-11 | 2022-08-11 | Double-tube-plate heat exchanger structure suitable for medium-pressure working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218066097U true CN218066097U (en) | 2022-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222107533.2U Active CN218066097U (en) | 2022-08-11 | 2022-08-11 | Double-tube-plate heat exchanger structure suitable for medium-pressure working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218066097U (en) |
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2022
- 2022-08-11 CN CN202222107533.2U patent/CN218066097U/en active Active
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