CN107764126B

CN107764126B - Heat exchanger and drainage device thereof

Info

Publication number: CN107764126B
Application number: CN201711183926.9A
Authority: CN
Inventors: 徐志强; 赵雷; 李林; 靳文超; 张捷
Original assignee: Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2022-12-27
Anticipated expiration: 2037-11-23
Also published as: CN107764126A

Abstract

The invention belongs to the field of refrigeration and heating equipment, and particularly provides a heat exchanger and a liquid discharge device thereof. The invention aims to solve the problem that accumulated water in an upper cavity formed by a partition plate, a tube box and a tube plate in the conventional shell-and-tube heat exchanger corrodes the shell-and-tube heat exchanger. Therefore, the liquid drainage device comprises a communication channel and a suspension ball which are arranged on the partition plate, wherein the communication channel is used for communicating an upper cavity and a lower cavity on the upper side and the lower side of the partition plate. The suspension ball is arranged in the lower cavity, and when the liquid in the lower cavity is filled, the suspension ball floats to separate the communicating channel; when the liquid in the lower cavity is exhausted, the floating ball descends under the action of gravity, and the communication channel is opened. Therefore, the liquid discharge device can lead the communication channel to be isolated when the heat exchanger works and to be opened when the heat exchanger does not work, thereby avoiding the liquid accumulated in the upper cavity and the lower cavity from corroding the heat exchanger.

Description

Heat exchanger and liquid drainage device thereof

Technical Field

The invention belongs to the field of refrigeration and heating equipment, and particularly provides a heat exchanger and a liquid discharge device thereof.

Background

Shell and tube heat exchangers exist in the prior art that mainly comprise a shell, tube plates, partition plates, tube bundles, baffle plates and tube boxes. Wherein, the both ends of casing are provided with the tube sheet respectively, and the both ends of many tube bundles are passed respectively and are fixed to the tube sheet. The two tube boxes are respectively arranged at the outer sides of the two tube plates, so that a closed cavity is formed between the tube boxes and the tube plates, and usually, one of the two tube boxes is provided with an upper liquid inlet and a lower liquid outlet. The partition plate is horizontally arranged between the tube box and the tube plate and separates the upper liquid inlet and the lower liquid inlet, so that a U-shaped first channel is formed between the upper liquid inlet and the lower liquid inlet and the plurality of tube bundles and between the upper liquid inlet and the lower liquid inlet and the other tube box.

Furthermore, a plurality of baffles penetrated by the tube bundle are arranged between the two tube plates at equal intervals, so that a circuitous second channel is formed between the shell and the baffles. The shell is provided with a liquid inlet and outlet respectively at two ends of the second channel, and is used for enabling liquid to flow into the second channel from one of the liquid inlet and outlet and flow out of the second channel from the other liquid inlet and outlet.

When the shell and tube heat exchanger works, first liquid is introduced into the first channel, second liquid is introduced into the second channel, and the first liquid and the second liquid exchange heat through the tube bundle, so that the aim of heating or refrigerating target liquid is fulfilled.

The shell-and-tube heat exchangers described above are generally classified into a dry type and a flooded type. In the case of flooded shell-and-tube heat exchangers, water is introduced into the first channel and coolant is introduced into the second channel. After the flooded shell-and-tube heat exchanger is used up, part of water can not be discharged from an upper cavity formed by the partition plate, the tube box and the tube plate, and the shell-and-tube heat exchanger is corroded. The portion of water is primarily present in the upper plenum in the space below the tube bundle.

Accordingly, there is a need in the art for a new shell and tube heat exchanger that addresses the above-mentioned problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely to solve the problem that accumulated water in an upper cavity formed by a partition plate, a tube box and a tube plate in the conventional shell-and-tube heat exchanger corrodes the shell-and-tube heat exchanger, the invention provides a liquid drainage device of the heat exchanger, wherein the heat exchanger comprises the partition plate, at least one part of the heat exchanger is divided into an upper cavity and a lower cavity by the partition plate, and the upper cavity and the lower cavity are both communicated with the outside; the liquid drainage device comprises a communication channel and a suspension mechanism, wherein the communication channel is arranged on the partition plate and is used for communicating the upper cavity with the lower cavity; the suspension mechanism is positioned in the lower cavity and is connected with the partition plate or the shell of the heat exchanger; the suspension mechanism is arranged to float along with the increase of the liquid in the lower cavity and abut against the lower end of the communication channel, so that the communication channel is blocked.

In a preferred embodiment of the above liquid discharge apparatus, the liquid discharge apparatus further includes a connecting rod disposed on the partition or the housing, the connecting rod is slidably connected to the suspension mechanism along an axial direction thereof, and the connecting rod is aligned with a lower end of the communication passage along the axial direction thereof.

In a preferred embodiment of the above drainage device, the suspension mechanism is a suspension ball.

In a preferred technical scheme of the above liquid discharge device, the partition plate is provided with a circular groove at the lower end of the communication channel, and the circular groove is matched with the top end of the floating ball in shape.

In a preferred embodiment of the above drainage device, the drainage device includes a plurality of the communication channels, and the suspension mechanism is capable of blocking all the communication channels.

In addition, the invention also provides a heat exchanger which comprises the liquid drainage device in any one of the preferable technical schemes of the liquid drainage device.

In a preferred embodiment of the above heat exchanger, the heat exchanger is a shell-and-tube heat exchanger.

In a preferred technical solution of the above heat exchanger, each of the tubes in the tube bundle of the shell-and-tube heat exchanger is a V-shaped tube, one end of the V-shaped tube is led to the upper cavity, and the other end of the V-shaped tube is led to the lower cavity.

In a preferred embodiment of the above heat exchanger, the liquid discharge devices are disposed at both ends of the shell-and-tube heat exchanger.

In a preferred technical solution of the above heat exchanger, the partition plate is a non-planar structure, and the upper end of the communication passage is located at the lowest point of the partition plate.

It can be understood by those skilled in the art that in the preferred technical solution of the present invention, the communicating channel is arranged on the partition plate to communicate the upper cavity with the lower cavity at one end of the heat exchanger, so that when the heat exchanger is not in use, the solution in the upper cavity can flow into the lower cavity through the communicating channel and then be discharged through the liquid discharge port communicated with the lower cavity, thereby preventing the liquid accumulated in the upper cavity and the lower cavity from corroding the heat exchanger.

Furthermore, the on-off of the communication channel is controlled by the suspension ball arranged in the lower cavity, so that the communication channel is isolated when the heat exchanger works, and the communication channel is opened when the heat exchanger does not work. Specifically, when water is injected into the lower cavity, the suspension ball gradually floats along with the rise of the water level until the lower end of the communication channel is blocked. At this time, the communication passage is blocked. When the water in the lower cavity is emptied, the suspension ball falls back to the original position under the action of gravity, the communication channel is opened, and the water in the upper cavity can enter the lower cavity through the communication channel.

Drawings

Preferred embodiments of the present invention are described below in conjunction with a shell and tube heat exchanger with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic structural view of the shell and tube heat exchanger of the present invention FIG. 1;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 2;

FIG. 4 is a view in the direction of C in FIG. 3;

fig. 5 is a preferred configuration diagram of the partition plate provided in the header.

List of reference numerals:

1. a housing; 2. a tube sheet; 3. a tube bundle; 4. a baffle plate; 5. a pipe box; 51. a first liquid inlet and outlet; 52. a second liquid inlet and outlet; 6. a first liquid inlet pipe; 7. a first liquid outlet pipe; 8. a second liquid inlet pipe; 9. a second liquid outlet pipe; 10. a partition plate; 101. a communication channel; 11. a water drain valve; 12. suspending the ball; 13. a connecting rod.

Detailed Description

It should be understood by those skilled in the art that the embodiments are only used for explaining the technical principle of the present invention, and are not used for limiting the scope of the present invention. For example, although the drain of the present invention is described in terms of a flooded shell and tube heat exchanger, the drain of the present invention can be applied to any other feasible heat exchanger, such as a floating head heat exchanger, a fixed tube plate heat exchanger, a U-shaped tube plate heat exchanger, a plate heat exchanger, etc., and those skilled in the art can make modifications as needed to adapt to a particular application, and the modified solution will still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and 2, the shell-and-tube heat exchanger of the present invention mainly includes a shell 1, a tube sheet 2, a tube bundle 3, a baffle plate 4, a tube box 5, a first liquid inlet tube 6, a first liquid outlet tube 7, a second liquid inlet tube 8, a second liquid outlet tube 9, and a partition plate 10. Wherein, both ends of casing 1 are provided with a tube sheet 2 respectively, and tube bank 3 sets up in casing 1 and both ends pass tube sheet 2 respectively. One side of each tube plate 2, which is far away from the shell 1, is fixedly provided with a tube box 5, so that a closed cavity is formed between each two tube plates 2 and each two tube boxes 5. The shell 1 and the two tube headers 5 together form the shell of the shell-and-tube heat exchanger.

As shown in fig. 1, a horizontal or approximately horizontal baffle 10 is arranged in the cavity at the left end of the shell-and-tube heat exchanger. A partition 10 divides the chamber into an upper chamber (not shown) and a lower chamber (not shown). Wherein, a first liquid inlet 51 is arranged on the cavity wall of the lower cavity and is communicated with the outside through a first liquid inlet pipe 6. The wall of the upper cavity is provided with a second liquid inlet 52 which is communicated with the outside through a first liquid outlet pipe 7. In addition, the partition board 10 can be inclined or vertically arranged by those skilled in the art according to actual needs.

With continued reference to fig. 1 and 2. One part of the tube bundle 3 communicates the upper cavity with the cavity at the right end of the shell and tube heat exchanger, and the other part of the tube bundle 3 communicates the lower cavity with the cavity at the right end of the shell and tube heat exchanger. So that the first liquid inlet pipe 6, the lower cavity, the tube bundle 3, the cavity at the right end of the shell-and-tube heat exchanger, the upper cavity and the first liquid outlet pipe 7 form a first channel. The first channel is for the passage of a first liquid, which in a preferred embodiment of the invention is water. Or one skilled in the art may also use other liquids instead of water, such as hydraulic oil and water glycol, as desired. In addition, the skilled in the art can replace the sequence of the first liquid inlet pipe 6 and the first liquid outlet pipe 7 as required, so that the first liquid outlet pipe 7 is used as a liquid inlet pipe, and the first liquid inlet pipe 6 is used as a liquid outlet pipe.

It will be understood by those skilled in the art that the purpose of passing both ends of the tube bundle 3 through the tube sheet 2 is to communicate the upper and lower plenums at the left end of the shell and tube heat exchanger with the plenums at the right end of the shell and tube heat exchanger, respectively. Therefore, on the premise of realizing this function, the two ends of the tube bundle 3 do not need to pass through the tube plate 2, for example, a plurality of through holes corresponding to the tube bundle 3 are provided on the tube plate 2, so that the two ends of the tube bundle 3 are aligned with the through holes respectively while being connected with the tube plate 2.

With continued reference to fig. 1, a plurality of baffles 4 are disposed within the shell 1 through which the tube bundle 3 passes, the baffles 4 serving to secure the tube bundle 3 and also forming a circuitous path with the shell 1. Further, the housing 1 is further provided with a second liquid inlet pipe 8 and a second liquid outlet pipe 9, and the second liquid inlet pipe 8 and the second liquid outlet pipe 9 are respectively communicated with two ends of the roundabout channel, so that the second liquid inlet pipe 8, the second liquid outlet pipe 9 and the roundabout channel jointly form a second channel. This second channel is used for the passage of a second liquid, which in a preferred embodiment of the invention is a coolant (e.g. freon). Or one skilled in the art may also use other liquids instead of the coolant, such as hydraulic oil, water glycol, water, etc., as desired. In addition, the skilled in the art can replace the second liquid inlet pipe 8 and the second liquid outlet pipe 9 in sequence as required, so that the second liquid outlet pipe 9 serves as a liquid inlet pipe, and the second liquid inlet pipe 8 serves as a liquid outlet pipe.

As shown in fig. 2 to 4, the liquid discharge apparatus of the present invention mainly includes a communication passage 101, a levitation ball 12, and a connection rod 13. Wherein, the communication channel 101 is disposed on the partition board 10 along the thickness direction of the partition board 10, and the upper end of the connecting rod 13 is fixedly connected with the partition board 10, and the connection may be any feasible connection, such as threaded connection, welding, bolt connection, etc. And, the connection rod 13 is preferably vertically connected with the partition 10. The levitating sphere 12 is slidably connected to a connecting rod 13.

When water is filled into the lower cavity, the floating ball 12 gradually floats along the axial direction of the connecting rod 13 along with the rising of the water level until the lower end of the communicating channel 101 is blocked. At this time, the communication passage 101 is blocked. When the water in the lower cavity is emptied, the suspension ball 12 falls back to the original position under the action of gravity, the communication channel 101 is opened, and the water in the upper cavity can enter the lower cavity through the communication channel 101.

It will be understood by those skilled in the art that when the shell and tube heat exchanger is required to operate normally, the communication passage 101 is blocked to prevent the first passage from being short-circuited. When the shell-and-tube heat exchanger does not work, particularly does not work for a long time, the communication channel 101 is opened, so that water in the upper cavity at the left end of the shell-and-tube heat exchanger can flow into the lower cavity through the communication channel 101 and then is discharged through the water drain valve 15 communicated with the lower cavity. The corrosion of water in the upper cavity and the lower cavity to the shell-and-tube heat exchanger is effectively prevented when the shell-and-tube heat exchanger is not used.

It will also be appreciated by those skilled in the art that the tie rods 13 may also be attached to the tube sheet 2 or the tube box 5 before the suspension spheres 12 are able to perform the function of blocking and opening the communication channel 101. Furthermore, one skilled in the art can fixedly connect one end of the connecting rod 13 to the floating ball 12, pivotally connect the other end of the connecting rod 13 to the tube sheet 2, the tube box 5 or the partition plate 10, and locate the communication channel 101 on the rotation path of the floating ball 12 around the pivot end of the connecting rod 13, so that the floating ball 12 can block the communication channel 101 when the water level in the lower chamber rises.

As shown in fig. 3 and 4, in the preferred embodiment of the present invention, a plurality of adjacent communication passages 101 are provided in the partition plate 10, and the lower ends of the plurality of communication passages 101 are provided with circular grooves (not shown). And the projections of the plurality of communication channels 101 in the horizontal direction are all located in the circular groove, so that the purpose that the plurality of communication channels 101 are all blocked by one floating ball 12 can be achieved. The structure increases the flow capacity between the upper cavity and the lower cavity and reduces the arrangement of the floating ball 12.

Further, those skilled in the art may also provide an elastic sealing ring at the lower end of the circular groove shown in fig. 3 as needed, so that the plurality of communication passages 101 can be effectively blocked by the contact of the floating ball 12 with the elastic sealing ring.

It will be understood by those skilled in the art that the levitation ball 12 can be replaced by any feasible levitation mechanism, such as a rectangular levitation block, a ball check valve, a levitation piston, etc., provided that the blocking and opening of the plurality of communication channels 101 is achieved.

As shown in fig. 5, in each of the above-described embodiments of the present invention, the horizontally disposed partition wall 10 is disposed in the following structure: the height in the vertical direction gradually decreases along the edge toward the communication passage 101. Alternatively, the skilled person can also arrange the partition 10 in other forms of non-planar structures, as required, and have the upper end of the communication passage 101 at the lowest point of the partition 10. So that all the water in the upper chamber can flow into the lower chamber through the communication passage 101, preventing the water accumulation in the upper chamber.

In summary, the drainage device of the present invention enables water in the upper cavity at the left end of the shell-and-tube heat exchanger in fig. 1 to flow into the lower cavity in time when the shell-and-tube heat exchanger is not in use, and then flow to the outside in time from the water drain valve 11 communicated with the lower cavity. Therefore, the liquid drainage device can prevent the shell-and-tube heat exchanger from being corroded by water in the upper cavity and the lower cavity when the shell-and-tube heat exchanger is not used.

In addition, as required, a person skilled in the art can set each pipeline in the tube bundle 3 into a V-shaped tube, so that one end of each V-shaped tube is communicated with the upper cavity, and the other end of each V-shaped tube is communicated with the lower cavity. Alternatively, one skilled in the art can also arrange a drainage device at each end of the shell-and-tube heat exchanger as required.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. The liquid drainage device of the heat exchanger comprises a partition plate, wherein at least one part of the heat exchanger is divided into an upper cavity and a lower cavity by the partition plate, and the upper cavity and the lower cavity are both communicated with the outside;

it is characterized in that the liquid discharge device comprises a communication channel and a suspension mechanism,

the communicating channel is arranged on the partition plate and is used for communicating the upper cavity with the lower cavity;

the suspension mechanism is positioned in the lower cavity and is connected with the partition plate or the shell of the heat exchanger;

the suspension mechanism is arranged to float along with the increase of the liquid in the lower cavity and abut against the lower end of the communication channel, so that the communication channel is blocked.

2. The liquid discharge apparatus of a heat exchanger according to claim 1, further comprising a connecting rod provided on the partition or the housing, the connecting rod being slidably connected to the suspending mechanism in an axial direction thereof, and the connecting rod being aligned with a lower end of the communication passage in the axial direction thereof.

3. The liquid discharge device of the heat exchanger as claimed in claim 2, wherein the levitation mechanism is a levitation ball.

4. The liquid discharge apparatus of a heat exchanger according to claim 3, characterized in that the partition plate is provided with a circular groove at a lower end of the communication passage, the circular groove matching a shape of a tip of the floating ball.

5. The liquid discharge device of the heat exchanger according to any one of claims 1 to 4, characterized in that the liquid discharge device includes a plurality of the communication passages, and the suspending mechanism is provided so as to be able to block all the communication passages.

6. A heat exchanger, characterized in that it comprises a liquid discharge device according to any one of claims 1 to 5.

7. The heat exchanger of claim 6, wherein the heat exchanger is a shell and tube heat exchanger.

8. The heat exchanger as set forth in claim 7, wherein each tube in the tube bundle of the shell and tube heat exchanger is a V-tube, one end of the V-tube opening into the upper plenum and the other end of the V-tube opening into the lower plenum.

9. The heat exchanger of claim 7, wherein both ends of the shell and tube heat exchanger are provided with the drain.

10. The heat exchanger of claim 8 or 9, wherein the partition is of non-planar configuration, and the upper end of the communication channel is located at the lowest point of the partition.