CN209263717U - A kind of hairpin heat exchanger using novel baffling grid - Google Patents

Abstract

The utility model relates to arrive a kind of hairpin heat exchanger using novel baffling grid, he includes tube bank (3), the tube bank (3) is provided with baffling grid I (3.4), baffling grid II (3.5), baffling grid III (3.6), the baffling grid I (3.4) has multiple, straight part equidistant arrangement of the baffling grid I in U-shaped shell (4), the fluting direction of baffling grid I (3.4) in adjacent position is mutually perpendicular to, multiple baffling grids II (3.5) are equipped in the curved segment part shell of the U-shaped shell (4), baffling grid II (3.5) equidistant arrangement in the shell of U-shaped shell (4) curved segment part, a baffling grid III (3.6) is equipped between every two baffling grid II (3.5), baffling grid II (3.5) and baffling grid III (3.6) Fluting direction be mutually perpendicular to.Crushing can be greatly reduced while keeping compared with high heat transfer efficiency using the heat exchanger of the baffling grid.

Description

A kind of hairpin heat exchanger using novel baffling grid

Technical field

The utility model relates to technical field of heat exchange, more particularly to a kind of back bending shell-and-tube using novel baffling grid Heat exchanger.

Background technique

The characteristics of hairpin heat exchanger is commonly called as hair fastener type heat exchanger, has both bushing type and shell-and-tube heat exchanger is applicable in In the processing medium Temperature cross-over operating condition of shell journey, structure is compact to design, and heat transfer efficiency is high, and crushing is smaller, compared with common shell Formula heat exchanger, investment is less, and weight is lighter.

Non-disconnectable hairpin heat exchanger from the point of view of structure, as by a fixed tube-sheet exchanger as heat exchanger tube one Sample curves U-shaped, and main component has U-shaped heat exchanger tube, tube sheet, U-shaped shell, bobbin carriage, adapter tube etc., and expanded joint or welding are leaned in heat exchanger tube tube bank Method is fixed on the tube sheet at both ends, and tube sheet is integral with case weld, usual horizontal placement, saddle support.Join in pipe, shell side Full counterflow heat exchange may be implemented with the two media of heat exchange, in order to enhance heat exchange, be usually placed equidistant with single arch or double in shell side Segmental baffle forces the medium in shell side to flow transversely through tube bank outside.Single segmental baffle makes shell side biography with higher The thermal efficiency, but also bring higher pressure drop.Double segmental baffle is compared with the former, and under identical baffle spacing, pressure drop can be with It is typically reduced to 50%-70%, but also can largely reduce heat transfer efficiency simultaneously.

The Chinese patent of Publication No. CN207317617U at present discloses a kind of single segmental baffle, comprising: connection End, dished plate, feed opening, liquid-passing hole slot；The connecting pin is integrated with single cambered plate, and material is GB9948 steel, connecting pin with Dished plate is connected as T-type structure；The both ends of the feed opening have 45 ° of chamferings, and adjacent charging pitch of holes is d > 20mm, described Liquid-passing hole slot position is in cooling dead zone.Although simple using this structure structure, heat transfer efficiency is improved, is also brought simultaneously Higher pressure drop.

Hairpin heat exchanger original is chiefly used in fine chemistry industry, and steam generating system is also opened in photo-thermal power generation unit in recent years The heat exchanger to begin using this structure, but in order to reduce the purchase cost of oil pump, heat exchanger is to thermally conductive in steam generating system Oily side pressure drop is more demanding, needs to reduce pressure of the conduction oil by heat exchanger as far as possible under the premise of keeping heat transfer efficiency Loss, in this way, the baffle plate of traditional structure just seems awkward.

Utility model content

The purpose of this utility model is to solve the problems, such as proposed in above-mentioned background, by hairpin heat exchanger shell Mono- group of Cheng Caiyong novel baffling grid reduces medium by the crushing after shell side, reduces stream under the premise of compared with high heat transfer efficiency Exchange heat tube vibration caused by body induction.

The utility model realizes a kind of technical solution used by above-mentioned function: back bending shell using novel baffling grid Formula heat exchanger, including upper tube box, lower tube box are restrained, U-shaped shell, are provided with baffling grid I, baffling grid II in the tube bank With baffling grid III, the baffling grid I has multiple, and the baffling grid I uniformly equidistantly divides in the straight part of U-shaped shell The fluting direction of cloth, the baffling grid I in adjacent position is mutually perpendicular to, and is set in the curved segment part shell of the U-shaped shell Multiple baffling grids II are equipped with, the baffling grid II is uniformly distributed in the curved segment part shell of U-shaped shell, the every two folding It flows and is provided with a baffling grid III between grid II, the fluting direction of the baffling grid II and baffling grid III is mutually hung down Directly.

I periphery of baffling grid is evenly arranged with skeleton square steel.

Support inner ring is provided on the baffling grid II, the baffling grid II is split as blocky assembly.

The baffling grid III includes grating, and support inner ring is provided on the grating, described right around grating Side channel mouth direction is provided with close ring, and support outer ring is provided in the close ring, and the close ring is semi-ring.

The number of baffling grid I is that the fluting direction of even number is vertical direction.

The number of baffling grid I is that the fluting direction of odd number is horizontal direction.

The fluting direction of the baffling grid II is in vertical direction.

The fluting direction of the baffling grid III is in horizontal direction.

Compared with the prior art, the advantages of the utility model are: this back bending shell-and-tube using novel baffling grid Heat exchanger has been superimposed the advantages of hairpin heat exchanger and deflection rod heat exchanger, under the premise of compared with high heat transfer efficiency, so that Medium is reduced to the greatest extent by the crushing after shell side, effectively reduces the Flow-induced vibration of heat exchanger tube.And due to The reason of structure, and also to ensure that all weld seams of cylinder can carry out effective non-destructive testing, existing back bending shell-and-tube The heat exchanger tube of heat exchanger blind can only be worn when passing through cylinder straight section, and the use of Novel grille can solve traditional rod baffle lap welding and connect The projection of every group of rod baffle circle caused by deformation pore center not on one wire the problem of, facilitate the assembly of heat exchanger tube.

Detailed description of the invention

Fig. 1 is planar structure schematic diagram of the utility model using the hairpin heat exchanger of novel baffling grid, In:

1, upper tube box；2, lower tube box；3, it restrains；4, shell；5, fixing end saddle；6, sliding end saddle.

Fig. 2 is the utility model Pipe bundle structure schematic diagram, in which:

3.1, upper perforated plate；3.2, lower perforated plate；3.3, U-shaped heat exchanger tube；3.4, baffling grid I；3.5, baffling grid II；3.6, Baffling grid III；3.7, distance sink tube；3.8, skeleton square steel；3.9, pull rod；

Fig. 3 is the structural schematic diagram that number is #2, #4, #6 ... baffling grid I in the utility model, in which:

3.8, skeleton square steel.

Fig. 4 is the structural schematic diagram that number is #1, #3, #5 ... baffling grid I in the utility model.

Fig. 5 is the structural schematic diagram for the baffling grid II that number is # I # III in the utility model, in which:

3.10, inner ring is supported.

Fig. 6 is the structural schematic diagram for the baffling grid III that number is # II # IV in the utility model, in which:

3.10, inner ring is supported；3.11, outer ring is supported；3.12, close ring；3.13, grating.

Specific embodiment

The utility model is illustrated with reference to the drawings and specific embodiments:

As shown in Fig. 1 ~ 6, a kind of hairpin heat exchanger using novel baffling grid, it includes upper tube box 1, down tube Case 2, tube bank 3, U-shaped shell 4, fixing end saddle 5, sliding end saddle 6, it is described tube bank 3 include upper perforated plate 3.1, lower perforated plate 3.2, Baffling grid I 3.4, baffling grid II 3.5, baffling grid III 3.6, U-shaped heat exchanger tube 3.3, distance sink tube 3.7, skeleton square steel 3.8, Pull rod 3.9, the upper perforated plate 3.1 are welded in the lower end of upper tube box 1, and the lower perforated plate 3.2 is welded in the lower end of lower tube box 2, institute Stating baffling grid I 3.4 has multiple, and the baffling grid I 3.4 is uniformly equally spaced in the straight part of U-shaped shell 4, described every The fluting direction of two baffling grids I 3.4 in adjacent position should be mutually perpendicular to, and the periphery of the baffling grid I 3.4 is uniform It is provided with skeleton square steel 3.8, the distance sink tube 3.7 is truncated by baffling grid I 3.4, and the outer wall of the pull rod 3.9 is arranged with spacing Pipe 3.7 is provided with multiple baffling grids II 3.5, institute in the curved segment part shell of the U-shaped shell 4 to determine baffle(s) spacing It states baffling grid II 3.5 to be uniformly distributed in the curved segment part shell of U-shaped shell 4, be set between the every two baffling grid II 3.5 It is equipped with a baffling grid III 3.6, the fluting direction of the baffling grid II 3.5 and baffling grid III 3.6 is mutually perpendicular to, described Support inner ring 3.10 is provided on baffling grid II 3.5, the baffling grid II 3.5 is split as bulk, the baffling when assembling Grid III 3.6 includes grating 3.13, and support inner ring 3.10 is provided on the grating 3.13, described to surround grating 3.13 Right side notch direction is provided with close ring 3.12, and support outer ring 3.11, the close ring are provided in the close ring 3.12 3.12 be semi-ring, and the number of baffling grid I 3.4 is that the fluting direction of even number is vertical direction, and the baffling grid I 3.4 is compiled The fluting direction for number being odd number is horizontal direction, and the fluting direction of the baffling grid II 3.5 is in vertical direction, the baffling lattice The fluting direction of grid III 3.6 is in horizontal direction.

The assembly of tube bank and the assembly of cylinder interlock it is synchronous carry out, avoid the position that shell side is imported and exported, baffling grid I 3.4 It is connected on tube sheet by pull rod 3.9, distance sink tube 3.7 and skeleton square steel 3.8, with upper perforated plate 3.1 and lower perforated plate 3.2 group respectively At two identical frames；Later by the two frames through the straight part of U-shaped shell 4, the bent back portion of U-shaped shell 4 at this time Divide and do not weld for the time being, before poling, baffling grid II 3.5 should be placed into designated position, then start poling, when same bending half After the U-shaped heat exchanger tube 3.3 of diameter has been worn, by baffling grid III 3.6 split after corresponding lath be welded in place, repeatedly until After all heat exchanger tubes have all passed, by 3.10 fit on of close ring of bent tube section grid II 3.5, and by every grate item and it is closed 3.10 firm welding of ring.At this moment it can divide the bent back portion of U-shaped shell 4 to erection welding, later according to heat exchanger Normal process steps complete follow-up work.

When heat exchanger is passed through in use, after the medium of shell-side enters shell, meeting is flowed along heat exchanger tube in axial, due to Not only there is no the Cross-flow drags of tube bank, but also effect of not turning repeatedly, thus shell-side pressure drop is very little；In addition, due to being situated between Matter be it is vertical plunder tube bank, thus cause the vortex shedding, turbulent buffeting, elasticity of fluid exciting of induced vibration (this cause crossing current to change The Flow-induced vibration of pipe in hot device) all it will be not present, the vibration of heat exchanger tube is also effectively relieved.

In addition to the implementation, the utility model further includes having other embodiments, all to use equivalents or equivalent The technical solution that alternative is formed, should all fall within the protection scope of the utility model claims.

Claims (8)

1. a kind of hairpin heat exchanger using novel baffling grid, including upper tube box (1), lower tube box (2) are restrained (3), U-shaped shell (4), it is characterised in that: be provided with baffling grid I (3.4), baffling grid II (3.5), baffling on the tube bank (3) Grid III (3.6), the baffling grid I (3.4) have multiple, straight part of the baffling grid I (3.4) in U-shaped shell (4) It is uniformly equally spaced, the fluting direction of the baffling grid I (3.4) in adjacent position is mutually perpendicular to, the U-shaped shell (4) Multiple baffling grids II (3.5) are provided in the shell of curved segment part, the baffling grid II (3.5) is in the curved segment portion of U-shaped shell (4) Divide in shell and be uniformly distributed, a baffling grid III (3.6), the baffling lattice are provided between every two baffling grid II (3.5) The fluting direction of grid II (3.5) and baffling grid III (3.6) is mutually perpendicular to.

2. a kind of hairpin heat exchanger using novel baffling grid according to claim 1, it is characterised in that: institute It states baffling grid I (3.4) periphery and is evenly arranged with skeleton square steel (3.8).

3. a kind of hairpin heat exchanger using novel baffling grid according to claim 1, it is characterised in that: institute It states and is provided with support inner ring (3.10) on baffling grid II (3.5), the baffling grid II (3.5) is split as blocky assembly.

4. a kind of hairpin heat exchanger using novel baffling grid according to claim 1, it is characterised in that: institute Stating baffling grid III (3.6) includes grating (3.13), and support inner ring (3.10) is provided on the grating (3.13), is surrounded Notch direction, which is provided in close ring (3.12) close ring (3.12), on the right side of the grating (3.13) is provided with outside support Ring (3.11), the close ring (3.12) are semi-ring.

5. a kind of hairpin heat exchanger using novel baffling grid according to claim 2, it is characterised in that: institute Stating the fluting direction that baffling grid I (3.4) number is even number is vertical direction.

6. a kind of hairpin heat exchanger using novel baffling grid according to claim 2, it is characterised in that: institute Stating the fluting direction that baffling grid I (3.4) number is odd number is horizontal direction.

7. a kind of hairpin heat exchanger using novel baffling grid according to claim 3, it is characterised in that: institute The fluting direction of baffling grid II (3.5) is stated in vertical direction.

8. a kind of hairpin heat exchanger using novel baffling grid according to claim 4, it is characterised in that: institute State the fluting direction of baffling grid III (3.6) in horizontal direction.