CN210718781U

CN210718781U - Heat exchanger plate and plate heat exchanger

Info

Publication number: CN210718781U
Application number: CN201921189743.2U
Authority: CN
Inventors: 郑玉平
Original assignee: Jiangsu Feks Heat Transfer Technology Co ltd
Current assignee: Jiangsu Feks Heat Transfer Technology Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-06-09
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a heat exchanger slab and plate heat exchanger belongs to the indirect heating equipment field. The front surface and the back surface of the heat exchanger plate are respectively provided with a plurality of spiral first fluid and second fluid circulation grooves, the cross section of each fluid circulation groove is in an isosceles trapezoid shape, the space utilization rate of the plate is high, the flow resistance is small, and the heat exchange is uniform; the fluid circulation grooves of the plate are punched and formed to form the interval bulges of the plate, the manufacture is convenient, the heat exchange wall is thin, and the pressure bearing capacity is strong. The utility model discloses a plate heat exchanger includes A slab and B slab, and wherein the A slab adopts heat exchanger slab, B slab and A slab become the mirror symmetry structure, and two kinds of heat transfer slab intervals are piled up, the installation of being convenient for, compact structure.

Description

Heat exchanger plate and plate heat exchanger

Technical Field

The utility model relates to a heat exchange equipment field, more specifically say, relate to a heat exchanger slab and plate heat exchanger.

Background

Compared with a shell-and-tube heat exchanger, the plate heat exchanger has the advantages of high heat transfer coefficient, large logarithmic mean temperature difference, small terminal temperature difference, small occupied area, light weight, low price, convenient manufacture, easy cleaning, small heat loss, difficult scaling and the like, and is often used in the fields of urban heating and refrigeration, petrochemical industry, waste heat recovery, food processing and the like. The plate of the plate heat exchanger is the most important part of the plate heat exchanger, and the design of the plate directly influences the heat exchange effect of the whole plate heat exchanger.

At present, the corrugated shape of the plates of a plate heat exchanger is: herringbone corrugations, straight corrugations, trapezoidal straight corrugations, zigzag corrugations, and the like. Compared with spiral corrugated plates, the corrugated plates have the advantages of low space utilization rate, short heat exchange flow channel and high flow resistance, so that the heat exchange effect is poor.

The existing spiral plate heat exchanger, such as "a spiral plate heat exchanger" disclosed in application No. 201310081310.6, is a spiral heat exchanger in the patent application of the invention, which is formed by rolling a plurality of parallel metal plates into a spiral channel, and heat exchange is performed between cold and hot fluids through spiral plate walls, and uneven heat exchange is easily caused because the plate walls are wide and thick. And the existing spiral plate heat exchanger has complex forming method and inconvenient manufacture.

Disclosure of Invention

The utility model aims to overcome current plate heat exchanger slab space utilization is lower, and the flow resistance is great and spiral plate heat exchanger heat transfer is uneven, makes inconvenient problem.

The utility model provides a heat exchanger plate, the edge of the plate is provided with a first fluid inlet and a second fluid outlet which are communicated, and the center of the plate is provided with a first fluid outlet and a second fluid inlet which are communicated; the front surface of the plate is provided with a plurality of spiral first fluid circulation grooves, and two ends of each first fluid circulation groove are respectively communicated with the first fluid inlet and the first fluid outlet and are not communicated with the second fluid inlet and the second fluid outlet; the back of the plate is provided with a plurality of spiral second fluid circulation grooves, and two ends of each second fluid circulation groove are respectively communicated with the second fluid inlet and the second fluid outlet and are not communicated with the first fluid inlet and the first fluid outlet.

Further, the first fluid circulation grooves on the front surface of the plate form second spacing bulges on the back surface of the plate, the second fluid circulation grooves on the back surface of the plate form first spacing bulges on the front surface of the plate, the first spacing bulges are shared between the adjacent first fluid circulation grooves, and the second spacing bulges are shared between the adjacent second fluid circulation grooves. The plate is formed by punching, so that the manufacturing is convenient, the plate wall is thin, and the heat exchange efficiency is favorably improved.

Furthermore, the cross sections of the first fluid circulation groove and the second fluid circulation groove are both isosceles trapezoids, so that the heat exchange area of the fluid circulation grooves is increased.

Furthermore, the first fluid inlet and the second fluid outlet are adjacently arranged, and the first fluid outlet and the second fluid inlet are adjacently arranged, so that the structural design is compact.

Furthermore, the front surface of each plate is provided with a positioning bulge, and the positioning bulge forms a positioning groove on the back surface of each plate, so that the positioning among the plates is facilitated.

The utility model also provides a plate heat exchanger, including upper cover plate, lower cover plate, heat exchanger slab, the heat exchanger slab includes A slab and B slab, the A slab adopts the utility model provides a heat exchanger slab, the front of B slab becomes mirror symmetry structure with the back of A slab, the back of B slab becomes mirror symmetry structure with the front of A slab, A slab and B slab interval distribution, the front of A slab and the back of B slab form first fluid circulation passageway, the back of A slab and the front of B slab form second fluid circulation passageway; the first fluid inlet, the second fluid outlet, the first fluid outlet and the second fluid inlet on each plate are communicated with each other to form through holes.

Furthermore, the upper cover plate and the lower cover plate are both provided with pipe connecting holes, wherein the pipe connecting holes of the upper cover plate correspond to the positions of the first fluid inlet and the second fluid outlet, and the pipe connecting holes of the lower cover plate correspond to the positions of the second fluid inlet and the first fluid outlet.

Furthermore, the pipe connecting holes of the upper cover plate and the lower cover plate are circular through holes, and elbow pipes are arranged on the outer side surfaces of the pipe connecting holes.

Furthermore, the surface of the outer side of the connecting pipe hole of the upper cover plate and the surface of the outer side of the connecting pipe hole of the lower cover plate are provided with convex hulls, and the side surfaces of the convex hulls are provided with circular through holes matched with the circular pipes.

Compared with the prior art, the plate heat exchanger provided by the utility model has the advantages that the fluid circulation groove of the heat exchanger plate is spiral, the cross section of the heat exchanger plate is isosceles trapezoid, the space utilization rate of the plate is high, the flow resistance is small, and the heat exchange is uniform; the plate is punched and formed, the manufacture is convenient, the heat exchange wall is thin, and the bearing capacity is strong. The utility model discloses a plate heat exchanger adopts two kinds of slab interval closed assembly of A slab and B slab to form, compact structure, the installation of being convenient for.

Drawings

Fig. 1 is a schematic perspective view of an a-plate of the present invention;

fig. 2 is a schematic plan view of the a plate of the present invention;

fig. 3 is a schematic perspective view of a B-plate of the present invention;

fig. 4 is a schematic plan view of the B-plate of the present invention;

fig. 5 is an exploded view of the heat exchanger utilizing A, B plate stacks of the present invention;

FIG. 6 is a cross-sectional view of a fluid communication groove of a plate;

FIG. 7 is a schematic view of a normal cross-section of a fluid channel of a heat exchanger;

FIG. 8 is a schematic view of the direction of fluid flow within the heat exchanger;

FIG. 9 is a schematic perspective view of an upper cover plate of the heat exchanger;

fig. 10 is another perspective view of the upper cover plate of the heat exchanger.

The reference numerals in the schematic drawings illustrate: 2. the structure of the plate comprises a first fluid outlet, 3, a first fluid flowing groove, 4, a second fluid inlet, 5, a positioning groove, 6, a second fluid outlet, 7, a first fluid inlet, 8, a second fluid flowing groove, 9, an upper cover plate pipe hole, 10, an upper cover plate, 11, a lower cover plate, 12, a lower cover plate pipe hole, 13, an A plate, 14, a B plate, 15, a bent pipe, 16, a convex hull, 17, a round hole, 18, a round pipe and 19, a positioning bulge, wherein the first fluid outlet is communicated with the first fluid flowing groove; 20. first spaced apart projections, 21 second spaced apart projections, 22 first fluid flow direction, 23 second fluid flow direction, 24 first fluid flow channel, 25 second fluid flow channel.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in fig. 1, 2, 6, and 7, the front surface of the a plate of the present invention has a plurality of spiral first fluid flowing grooves 3, and two adjacent first fluid flowing grooves 3 share a spiral first spacing protrusion 20. The edge of the A plate is provided with a first fluid inlet 7 and a second fluid outlet 6 which are communicated, the center of the A plate is provided with a first fluid outlet 2 and a second fluid inlet 4 which are communicated, and two ends of the first fluid circulation groove 3 are respectively communicated with the first fluid inlet 7 and the first fluid outlet 2. As can be seen in fig. 1, the first fluid inlet 7, the first fluid outlet 2 are concave and the second fluid inlet 4, the second fluid outlet 6 are convex, which allows the first fluid to flow in and out of the first fluid inlet, outlet but not into the second fluid inlet, outlet. The edge of the a plate is also provided with a positioning projection 19. The cross sections of the first fluid flowing groove 3 and the first spacing projection 20 are isosceles trapezoids.

As shown in fig. 3, 4, 6 and 7, the front surface of the B plate has a plurality of spiral second fluid flow grooves 8, and two adjacent second fluid flow grooves share one spiral second spacing protrusion 21. The edge of the B plate is provided with a first fluid inlet 7 and a second fluid outlet 6 which are communicated, the center of the B plate is provided with a first fluid outlet 2 and a second fluid inlet 4 which are communicated, and two ends of a second fluid circulation groove 8 are respectively communicated with the second fluid inlet 4 and the second fluid outlet 6. As can be seen in fig. 3, the first fluid inlet 7, the first fluid outlet 2 are convex and the second fluid inlet 4, the second fluid outlet 6 are concave, which allows the second fluid to flow in and out of the second fluid inlet, outlet but not into the first fluid inlet, outlet. The edge of the B plate is also provided with a positioning groove 5. The cross sections of the second fluid flow groove 8 and the second spacing projection 21 are isosceles trapezoids.

The utility model discloses a slab adopts the mode manufacturing of punching press, and the slab openly forms a recess, correspondingly, forms an interval arch in the corresponding position at the slab back. With reference to fig. 1, 2, 3, 4, 6, and 7, the front structure of the a plate and the back structure of the B plate are mirror images, and the back structure of the a plate and the front structure of the B plate are mirror images, that is, the a plate and the B plate are symmetrical structures.

As shown in fig. 5 and 7, the heat exchanger provided by the present invention is formed by stacking a plate and B plate, wherein A, B plates are arranged at intervals, the plate heat exchanger is stacked and brazed, which is a conventional means in the field, i.e. the protrusions at the back of the a plate are butted with the corresponding protrusions at the front of the B plate, the protrusions at the back of the B plate are butted with the corresponding protrusions at the front of the a plate, and the butt joints are brazed and sealed, so that a first fluid flow channel 24 is formed between the front of the a plate and the back of the B plate, and a second fluid flow channel 25 is formed between the back of the a plate and the front of the B plate. And an upper cover plate 10 and a lower cover plate 11 are welded outside. Corresponding to the first fluid inlet 7 and the second fluid outlet 6 on the A, B plate, the upper cover plate 10 is provided with corresponding through upper cover plate pipe holes 9. Corresponding to the first fluid outlet 2 and the second fluid inlet 4 on the A, B plate, the lower cover plate 11 is also provided with corresponding through lower cover plate connector holes 12.

As shown in fig. 9, the upper cover plate pipe hole 9 is a circular through hole, and the elbow pipe 15 is installed on the upper cover plate pipe hole. As shown in fig. 10, the upper cover plate pipe hole 9 is provided with a convex hull 16, and the side surface of the convex hull 16 is provided with a round hole 17 matched with a round pipe 18.

As shown in fig. 8, a first fluid (e.g., a cold fluid) enters the heat exchanger through the first fluid inlet 7, enters each layer of the first fluid flow channels of the heat exchanger, flows counterclockwise in the illustrated first fluid flow direction 22 to the first fluid outlet 2 and exits the outlet, and simultaneously, a second fluid (e.g., a hot fluid) enters the heat exchanger through the second fluid inlet 4, enters each layer of the second fluid flow channels of the heat exchanger, flows clockwise in the illustrated second fluid flow direction 23 to the second fluid outlet 6 and exits the outlet. Because first fluid circulation passageway, second fluid circulation passageway are the spiral, to the slab of equal area, have increased the time of fluid heat transfer, have improved heat exchange efficiency, in addition, adopt the direction of countercurrent flow heat transfer, have further improved heat exchange efficiency.

Claims

1. A heat exchanger plate characterized in that: the edge of the plate is provided with a first fluid inlet and a second fluid outlet which are communicated, and the center of the plate is provided with a first fluid outlet and a second fluid inlet which are communicated; the front surface of the plate is provided with a plurality of spiral first fluid circulation grooves, and two ends of each first fluid circulation groove are respectively communicated with the first fluid inlet and the first fluid outlet and are not communicated with the second fluid inlet and the second fluid outlet; the back of the plate is provided with a plurality of spiral second fluid circulation grooves, and two ends of each second fluid circulation groove are respectively communicated with the second fluid inlet and the second fluid outlet and are not communicated with the first fluid inlet and the first fluid outlet.

2. The heat exchanger plate according to claim 1, wherein: the first fluid circulation grooves on the front side of the plate form second spacing bulges on the back side of the plate, the second fluid circulation grooves on the back side of the plate form first spacing bulges on the front side of the plate, the first spacing bulges are shared between the adjacent first fluid circulation grooves, and the second spacing bulges are shared between the adjacent second fluid circulation grooves.

3. The heat exchanger plate according to claim 2, wherein: the cross sections of the first fluid circulation groove and the second fluid circulation groove are both isosceles trapezoids.

4. The heat exchanger plate according to claim 1, wherein: the first fluid inlet and the second fluid outlet are adjacently arranged, and the first fluid outlet and the second fluid inlet are adjacently arranged.

5. The heat exchanger plate according to claim 1, wherein: the front surface of the plate is provided with a positioning bulge, and the positioning bulge forms a positioning groove on the back surface of the plate.

6. The utility model provides a plate heat exchanger, includes upper cover plate, lower apron, heat exchanger slab, its characterized in that: the heat exchanger plate comprises an A plate and a B plate, wherein the A plate is the heat exchanger plate of any one of claims 1 to 5, the front surface of the B plate and the back surface of the A plate form a mirror symmetry structure, the back surface of the B plate and the front surface of the A plate form a mirror symmetry structure, the A plate and the B plate are distributed at intervals, the front surface of the A plate and the back surface of the B plate form a first fluid circulation channel, and the back surface of the A plate and the front surface of the B plate form a second fluid circulation channel; the first fluid inlet and the first fluid outlet and the second fluid inlet and the second fluid outlet on each plate are respectively communicated to form through holes.

7. A plate heat exchanger according to claim 6, wherein: the upper cover plate and the lower cover plate are both provided with pipe connecting holes, wherein the pipe connecting holes of the upper cover plate correspond to the positions of the first fluid inlet and the second fluid outlet, and the pipe connecting holes of the lower cover plate correspond to the positions of the second fluid inlet and the first fluid outlet.

8. A plate heat exchanger according to claim 7, wherein: the pipe connecting holes of the upper cover plate and the lower cover plate are circular through holes, and elbow pipes are arranged on the outer side surfaces of the pipe connecting holes.

9. A plate heat exchanger according to claim 7, wherein: the surface of the outer side of the connecting pipe hole of the upper cover plate and the surface of the outer side of the connecting pipe hole of the lower cover plate are provided with convex hulls, and the side surfaces of the convex hulls are provided with circular through holes matched with the circular pipes.