CN218270353U

CN218270353U - Flange structure for heat exchanger and liquid treatment equipment

Info

Publication number: CN218270353U
Application number: CN202221742029.3U
Authority: CN
Inventors: 常季; 李双江; 高帅宏
Original assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Current assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-01-10
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a flange structure and liquid treatment facility for heat exchanger, including ring flange and installation component, the ring flange is equipped with the feed liquor through-hole, and the installation component includes first connecting piece and first sealing member, and first connecting piece is used for connecting the feed liquor pipeline, and first connecting piece is equipped with be used for with the communicating first through-hole of feed liquor pipeline, and first connecting piece can be dismantled fixedly with the ring flange and make first through-hole and feed liquor through-hole communicate with each other to make the feed liquor pipeline communicate with each other with the feed liquor through-hole, first sealing member is established between first connecting piece and ring flange. The first connecting piece is detachably fixed with the flange plate, and the liquid inlet pipeline is connected with the flange plate through the first connecting piece to realize the communication between the liquid inlet pipeline and the liquid inlet through hole; compare traditional welded fastening mode, need not to weld and can realize the installation of inlet line and ring flange and make inlet line and feed liquor through-hole intercommunication, and first sealing member ensures the sealing performance between first connecting piece and the ring flange, satisfies the actual production needs.

Description

Flange structure for heat exchanger and liquid treatment equipment

Technical Field

The utility model relates to a heat transfer technical field especially relates to a flange structure and liquid treatment facility for heat exchanger.

Background

In the pharmaceutical industry, the chemical industry and other industries, the requirement on the hygiene level is high, and a heat exchanger is generally used for heat exchange of materials, which puts higher requirements on an interface of the heat exchanger.

The heat exchanger realizes the cooling or heating of the material through the flowing of the heat exchange medium, and the end part of the heat exchanger for the entering and the flowing-out of the clean medium is called as a clean end. In order to connect the heat exchange medium pipeline to the heat exchanger, the flange is usually used for connecting the heat exchanger, and then the heat exchange medium pipeline is welded to the flange. However, the operation of welding the heat exchange medium pipeline and the flange can cause thermal deformation of the flange and the heat exchange medium pipeline due to welding, which affects the assembly precision, and the decrease of the assembly precision affects the connection reliability, thereby being difficult to ensure the sealing reliability.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a flange structure for a heat exchanger and a liquid treatment system; this a flange structure for heat exchanger need not the welding and can carry out the installation of pipeline to can not lead to the assembly precision to descend because of welding thermal deformation, it is sealed relatively better simultaneously.

The technical scheme is as follows:

an embodiment provides a flange structure for a heat exchanger, including:

the flange plate is provided with a liquid inlet through hole;

the installation component, the installation component includes first connecting piece and first sealing member, first connecting piece is used for connecting the admission pipeline, first connecting piece be equipped with be used for with the communicating first through-hole of admission pipeline, first connecting piece with the ring flange can be dismantled fixedly and make first through-hole with the admission through-hole communicates with each other, so that the admission pipeline with the admission through-hole communicates with each other, first sealing member is established first connecting piece with between the ring flange.

In the flange structure for the heat exchanger, the flange plate is used for fixing the clean end of the heat exchanger, the first connecting piece is detachably fixed with the flange plate, the first through hole is communicated with the liquid inlet through hole, and the liquid inlet pipeline is connected with the flange plate through the first connecting piece, so that the liquid inlet pipeline is communicated with the liquid inlet through hole; compare traditional welded fastening mode, need not to weld and can realize the installation of inlet line and ring flange and make inlet line and feed liquor through-hole intercommunication, and first sealing member ensures the sealing performance between first connecting piece and the ring flange, satisfies the actual production needs.

The technical solution is further explained below:

in one embodiment, the flange plate is further provided with a liquid outlet through hole, the liquid outlet through hole and the liquid inlet through hole are arranged at intervals, the mounting assembly further comprises a second connecting piece and a second sealing piece, the second connecting piece is used for connecting a liquid outlet pipeline, the second connecting piece is provided with a second through hole communicated with the liquid outlet pipeline, the second connecting piece and the flange plate are detachably fixed, the second through hole is communicated with the liquid outlet through hole, the liquid outlet pipeline is communicated with the liquid outlet through hole, and the second sealing piece is arranged between the second connecting piece and the flange plate.

In one embodiment, the liquid inlet through hole is higher than the liquid outlet through hole, the first connecting piece is used for being connected with the first end of the liquid inlet pipeline, and the first connecting piece is obliquely arranged relative to the flange plate, so that the second end of the liquid inlet pipeline is higher than the first end.

In one embodiment, the flange plate is provided with a matching groove, the contour of the matching groove is matched with the contour of the first connecting piece, and the first connecting piece is fixed with the flange plate through the matching groove.

In one embodiment, the first connecting piece is arranged in a plate shape, the bottom surface of the matching groove is obliquely arranged relative to the disc surface of the flange plate, and the upper part of the bottom surface of the matching groove is obliquely arranged towards the direction of the flange plate far away from the first connecting piece, so that the first connecting piece is obliquely arranged relative to the flange plate.

In one embodiment, the liquid inlet through hole is arranged through the bottom wall of the matching groove, the flange plate is further provided with a first mounting groove, and the first mounting groove is arranged on the bottom wall of the matching groove and surrounds the periphery of the liquid inlet through hole; the first sealing element is a first sealing ring matched with the first mounting groove, the first sealing ring is pressed between the first connecting piece and the flange plate, and one part of the first sealing ring is positioned in the first mounting groove;

and the flange plate is also provided with a second mounting groove, the second mounting groove surrounds the periphery of the liquid outlet through hole, the second sealing element is a second sealing ring matched with the second mounting groove, the second sealing ring is pressed between the second connecting piece and the flange plate, and one part of the second sealing ring is positioned in the second mounting groove.

In one embodiment, the mounting assembly further comprises a first fixing member for detachably fixing the first connecting member to the flange plate;

and/or the mounting assembly further comprises a second fixing piece, and the second fixing piece is used for detachably fixing the second connecting piece to the flange plate.

In one embodiment, the first connector is a regular polygonal plate; or/and the second connecting piece is a regular polygonal plate.

In one embodiment, the flange is a circular disc, and the flange is used for being fixed with the heat exchanger; the liquid inlet through hole and the liquid outlet through hole are both round holes.

Another embodiment provides a liquid treatment apparatus comprising a flange structure for a heat exchanger as described in any of the above claims.

Above-mentioned liquid treatment equipment adopts aforementioned a flange structure for the heat exchanger, makes and realizes the installation through non-welded mode between heat transfer medium's the first pipeline and the ring flange, and satisfies the assembly precision and sealed the requirement, and then cooperates the heat exchanger to carry out the processing of liquid.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Furthermore, the drawings are not drawn to scale with 1.

Fig. 1 is an assembly structure diagram of a flange structure and a heat exchanger for a heat exchanger according to an embodiment of the present invention;

FIG. 2 is a general schematic view of a flange configuration for a heat exchanger in the embodiment of FIG. 1;

FIG. 3 is an exploded view of the flange structure for the heat exchanger in the embodiment of FIG. 2;

FIG. 4 is a schematic cross-sectional view of a flange structure for a heat exchanger in the embodiment of FIG. 2;

FIG. 5 is a side view of a flange configuration for the heat exchanger in the embodiment of FIG. 2;

FIG. 6 is a schematic view of the overall structure of the flange in the embodiment of FIG. 2;

fig. 7 is a schematic overall structure diagram of the first connecting member in the embodiment of fig. 2.

Reference is made to the accompanying drawings in which:

100. a flange plate; 110. a liquid inlet through hole; 120. a liquid outlet through hole; 130. a mating groove; 140. a first mounting groove; 150. a second mounting groove; 210. a first connecting member; 211. a first through hole; 220. a second connecting member; 221. a second through hole; 300. a heat exchanger.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

in order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

Referring to fig. 1 to 3, 6 and 7, one embodiment provides a flange structure for a heat exchanger 300, which includes a flange 100 and a mounting assembly, where the flange 100 is used to connect with the heat exchanger 300, and the mounting assembly is used to mount a pipeline of a heat exchange medium, so that the pipeline of the heat exchange medium is communicated with the heat exchanger 300.

Wherein:

as shown in fig. 3 and 6, the flange 100 is provided with inlet openings 110.

As shown in fig. 1, the heat exchanger 300 is substantially elongated, and the clean end of the heat exchanger 300 is used for entering and exiting a heat exchange medium to exchange heat with a material to be heated flowing through the heat exchanger 300.

For example, the left end of the heat exchanger 300 in the view of fig. 1 is a clean end, and the heat exchanger 300 performs the inlet and outlet of the heat exchange medium through the left end.

As shown in fig. 3 and 6, the flange 100 is provided with a liquid inlet through hole 110, so that the heat exchange medium enters the heat exchanger 300 and exchanges heat with the material to be heated in the heat exchanger 300.

As shown in fig. 2, 3 and 7, the mounting assembly includes a first connecting member 210 and a first sealing member (not shown), the first connecting member 210 is used for connecting the liquid inlet pipeline, the first connecting member 210 is provided with a first through hole 211 for communicating with the liquid inlet pipeline, the first connecting member 210 is detachably fixed to the flange plate 100 and enables the first through hole 211 to communicate with the liquid inlet through hole 110 so as to enable the liquid inlet pipeline to communicate with the liquid inlet through hole 110, and the first sealing member is arranged between the first connecting member 210 and the flange plate 100.

In the flange structure for the heat exchanger 300, the flange plate 100 is fixed with the clean end of the heat exchanger 300, the first connecting piece 210 is detachably fixed with the flange plate 100, the first through hole 211 is communicated with the liquid inlet through hole 110, and the liquid inlet pipeline is connected with the flange plate 100 through the first connecting piece 210, so that the liquid inlet pipeline is communicated with the liquid inlet through hole 110; compare traditional welded fastening mode, need not to weld and can realize the installation of inlet line and ring flange 100 and make inlet line and feed liquor through-hole 110 intercommunication, and first sealing member ensures the sealing performance between first connecting piece 210 and the ring flange 100, satisfies actual production needs.

As shown in fig. 7, the first connecting member 210 is provided with a first through hole 211, and after the liquid inlet pipeline is connected to the first connecting member 210, the lumen of the liquid inlet pipeline is communicated with the first through hole 211, and since the first connecting member 210 is fixed to the flange 100 and the first through hole 211 is communicated with the liquid inlet through hole 110, the liquid inlet pipeline is also communicated with the liquid inlet through hole 110 through the first through hole 211. In operation, the heat exchange medium enters from the liquid inlet pipe and enters the heat exchanger 300 through the first through hole 211 and the liquid inlet through hole 110.

It can be understood that:

the first connecting member 210 is equivalent to an intermediate member, so as to connect the liquid inlet pipeline with the flange plate 100 and enable the liquid inlet pipeline to input the heat exchange medium through the liquid inlet through hole 110 on the flange plate 100. And the first connecting piece 210 is detachably fixed with the flange plate 100, so that compared with the traditional welding and fixing mode, the situation that the installation precision is poor due to thermal deformation caused by welding can be avoided.

In one embodiment, referring to fig. 2 to 4 and 6, the flange plate 100 further has a liquid outlet hole 120, the liquid outlet hole 120 and the liquid inlet hole 110 are spaced apart, the mounting assembly further includes a second connector 220 and a second sealing member (not shown), the second connector 220 is used for connecting a liquid outlet pipe, the second connector 220 has a second through hole 221 for communicating with the liquid outlet pipe, the second connector 220 is detachably fixed to the flange plate 100 and enables the second through hole 221 to communicate with the liquid outlet hole 120, so that the liquid outlet pipe communicates with the liquid outlet hole 120, and the second sealing member is disposed between the second connector 220 and the flange plate 100.

As shown in fig. 1, flange 100 is secured to the clean end of heat exchanger 300; as shown in fig. 2, 4 and 6, the flange plate 100 is provided with a liquid inlet through hole 110 and a liquid outlet through hole 120, the liquid inlet through hole 110 is used for entering a heat exchange medium, and the liquid outlet through hole 120 is used for flowing out the heat exchange medium after heat exchange with a material.

As shown in fig. 2, the liquid inlet through hole 110 is correspondingly provided with a first connecting member 210 for connecting to a liquid inlet pipeline, and the liquid outlet through hole 120 is correspondingly provided with a second connecting member 220 for connecting to a liquid outlet pipeline. The heat exchange medium enters the heat exchanger 300 through the liquid inlet pipe via the liquid inlet through hole 110, and the heat exchange medium after heat exchange flows out through the liquid outlet pipe via the liquid outlet through hole 120.

In one embodiment, referring to fig. 1 to 6, the liquid inlet through hole 110 is disposed higher than the liquid outlet through hole 120, the first connecting member 210 is used for connecting to a first end of the liquid inlet pipeline, and the first connecting member 210 is disposed obliquely relative to the flange 100, so that a second end of the liquid inlet pipeline is higher than the first end.

As shown in fig. 4 and 5, the liquid inlet through hole 110 is located at the upper part of the flange plate 100, and the liquid outlet through hole 120 is located at the lower part of the flange plate 100; accordingly, the first connector 210 is located at an upper portion of the flange 100, and the second connector 220 is located at a lower portion of the flange 100. The heat exchange medium enters the heat exchanger 300 from the upper portion, and the heat exchanged heat exchange medium flows out from the lower portion.

As under the visual angle that fig. 4 and fig. 5 show, first connecting piece 210 is the slope setting for ring flange 100, and the upside of first connecting piece 210 is towards the one side slope of ring flange 100 to the feed liquor pipeline that connects on making first connecting piece 210 is the slope setting, and then makes the heat transfer medium in the liquid pipeline can carry out spontaneous flow by height to low, ensures that the heat transfer medium in the liquid pipeline can not appear detaining, ensures the cleanliness factor of system, and reduces because of detaining the bacterium breeding problem that heat transfer medium exists the stagnant water and lead to.

In one embodiment, referring to fig. 2, 3 and 6, the flange 100 is provided with a mating groove 130, the mating groove 130 has a contour matching the contour of the first connecting element 210, and the first connecting element 210 is fixed to the flange 100 through the mating groove 130.

As shown in fig. 2, 3 and 6, the engaging slot 130 is substantially triangular, and the first connecting member 210 is also substantially triangular, so that the first connecting member 210 is detachably fixed to the flange 100 through the engaging slot 130.

In one embodiment, referring to fig. 3 to 5, the first connecting member 210 is disposed in a plate shape, the bottom surface of the mating groove 130 is disposed obliquely with respect to the surface of the flange 100, and the upper portion of the bottom surface of the mating groove 130 is tilted toward the flange 100 away from the first connecting member 210, so that the first connecting member 210 is disposed obliquely with respect to the flange 100.

As shown in fig. 4, the upper portion of the matching groove 130 is inclined toward the right side, so that the first connecting member 210 matched with the bottom surface of the matching groove 130 is inclined relative to the flange plate 100, so as to incline the liquid inlet pipe connected to the first connecting member 210, as shown in fig. 5, the upper portion of the first connecting member 210 and the upper portion of the matching groove 130 are also inclined toward the right side, so that the entire outer surface of the first connecting member 210 is inclined relative to the plate surface of the flange plate 100.

In one embodiment, referring to fig. 4 and fig. 6, the liquid inlet through hole 110 is disposed through the bottom wall of the matching groove 130, the flange plate 100 is further provided with a first mounting groove 140, and the first mounting groove 140 is disposed on the bottom wall of the matching groove 130 and surrounds the periphery of the liquid inlet through hole 110; the first sealing element is a first sealing ring matched with the first installation groove 140, the first sealing ring is pressed between the first connecting element 210 and the flange 100, and a part of the first sealing ring is located in the first installation groove 140.

As shown in fig. 6, the flange plate 100 is further provided with a first mounting groove 140, and the first mounting groove 140 is disposed around the periphery of the liquid inlet through hole 110 for mounting a first sealing ring, so as to achieve sealing engagement between the flange plate 100 and the first connecting member 210.

Alternatively, as shown in fig. 6, the first mounting groove 140 is a circular groove, the liquid inlet through hole 110 is a circular hole, and the diameter of the first mounting groove 140 is larger than the hole diameter of the liquid inlet through hole 110; and the first sealing ring is a circular sealing ring adapted to the first mounting groove 140, and may be a circular rubber ring, for example.

In one embodiment, referring to fig. 4 and fig. 6, the flange plate 100 is further provided with a second mounting groove 150, the second mounting groove 150 surrounds the periphery of the liquid outlet through hole 120, the second sealing element is a second sealing ring matched with the second mounting groove 150, the second sealing ring is pressed between the second connecting element 220 and the flange plate 100, and a part of the second sealing ring is located in the second mounting groove 150.

As shown in fig. 4 and 6, the liquid inlet through hole 110 is correspondingly provided with a matching groove 130 at a position for installing the first connecting member 210; and the tank bottom surface of the mating tank 130 is obliquely arranged relative to the disk surface of the flange plate 100, so that the surface of the first connecting piece 210 is obliquely arranged relative to the disk surface of the flange plate 100, and therefore the heat exchange medium in the liquid inlet pipeline can spontaneously flow towards the heat exchanger 300, and the heat exchange medium is prevented from being retained in the liquid inlet pipeline. The positions of the liquid outlet holes 120 are not provided with grooves for installing the second connecting members 220, and the second connecting members 220 are not necessarily fixed with the flange plate 100 through the grooves.

As shown in fig. 6, a second mounting groove 150 is correspondingly disposed at the position of the liquid outlet through hole 120, the second mounting groove 150 surrounds the periphery of the liquid outlet through hole 120, and the second sealing ring is pressed against the second mounting groove 150 to achieve sealing engagement between the second connecting member 220 and the flange plate 100.

For example, in the embodiment shown in fig. 6, the liquid outlet through hole 120 is a circular hole, the second mounting groove 150 is a circular groove, and the diameter of the second mounting groove 150 is greater than the diameter of the liquid outlet through hole 120; and the second sealing ring is a circular sealing ring adapted to the second mounting groove 150.

Optionally, the groove cross-section of the first mounting groove 140 and the groove cross-section of the second mounting groove 150 may be semicircular or arc-shaped, so as to be respectively matched with the first sealing ring and the second sealing ring, which is not described in detail.

In one embodiment, the mounting assembly further includes a first fastener for removably securing the first connector 210 to the flange 100.

In one embodiment, the mounting assembly further includes a second fastener for removably securing the second connector 220 to the flange 100.

As shown in fig. 3, the first connecting member 210 is provided with a plurality of first fixing holes, the flange plate 100 is provided with first matching holes corresponding to the first fixing holes one by one, and the first fixing member may be a screw to detachably fix the first connecting member 210 to the flange plate 100 through the first fixing holes and the first matching holes.

Similarly, as shown in fig. 3, the second connecting element 220 is provided with a plurality of second fixing holes, the flange plate 100 is provided with second matching holes corresponding to the second fixing holes one to one, and the second fixing elements may be screws, so that the second connecting element 220 can be detachably fixed to the flange plate 100 through the second fixing holes and the second matching holes.

In one embodiment, referring to fig. 3 and 7, the first connecting member 210 is a regular polygonal plate.

In one embodiment, referring to fig. 3, the second connecting member 220 is a regular polygonal plate.

Optionally, the first connection element 210 and the second connection element 220 have the same structure, and both the first connection element 210 and the second connection element 220 are equilateral triangle plates. So set up, need not to carry out calibration and the inspection positive and negative and position in the installation, the installation is more convenient, and is difficult for the installation to make mistakes.

In one embodiment, referring to fig. 2 and 3, the flange 100 is a circular disk, and the flange 100 is used for fixing with the heat exchanger 300; the liquid inlet through hole 110 and the liquid outlet through hole 120 are both round holes.

Another embodiment provides a liquid treatment apparatus comprising a flange structure for a heat exchanger 300 as described in any of the above embodiments.

The liquid treatment equipment adopts the flange structure for the heat exchanger 300, so that the first pipeline of the heat exchange medium and the flange plate 100 are installed in a non-welding mode, the requirements on assembly precision and sealing are met, and the liquid treatment equipment is matched with the heat exchanger 300 to treat liquid.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A flange structure for a heat exchanger, comprising:

the flange plate is provided with a liquid inlet through hole;

2. The flange structure for the heat exchanger according to claim 1, wherein the flange plate is further provided with a liquid outlet hole, the liquid outlet hole and the liquid inlet hole are arranged at an interval, the mounting assembly further comprises a second connecting member and a second sealing member, the second connecting member is used for connecting a liquid outlet pipeline, the second connecting member is provided with a second through hole for communicating with the liquid outlet pipeline, the second connecting member and the flange plate are detachably fixed, and the second through hole is communicated with the liquid outlet hole, so that the liquid outlet pipeline is communicated with the liquid outlet hole, and the second sealing member is arranged between the second connecting member and the flange plate.

3. The flange structure for the heat exchanger as claimed in claim 2, wherein the liquid inlet through hole is disposed at a position higher than that of the liquid outlet through hole, the first connecting member is configured to be connected to the first end of the liquid inlet pipeline, and the first connecting member is disposed obliquely with respect to the flange plate so that the second end of the liquid inlet pipeline is higher than the first end.

4. A flange structure for a heat exchanger according to claim 3, wherein the flange plate is provided with a fitting groove having a contour matching a contour of the first connecting member, the first connecting member being fixed to the flange plate through the fitting groove.

5. A flange structure for a heat exchanger according to claim 4, wherein the first joining member is provided in a plate shape, a groove bottom face of the fitting groove is provided obliquely with respect to a plate face of the flange plate, and an upper portion of the groove bottom face of the fitting groove is inclined toward a direction of the flange plate away from the first joining member, so that the first joining member is provided obliquely with respect to the flange plate.

6. The flange structure for the heat exchanger according to claim 4, wherein the liquid inlet through hole is provided through a bottom wall of the fitting groove, and the flange plate is further provided with a first mounting groove which is provided on the bottom wall of the fitting groove and surrounds an outer periphery of the liquid inlet through hole; the first sealing element is a first sealing ring matched with the first mounting groove, the first sealing ring is pressed between the first connecting piece and the flange plate, and one part of the first sealing ring is positioned in the first mounting groove;

7. The flange structure for a heat exchanger according to any one of claims 2 to 6, wherein the mounting assembly further comprises a first fixing member for detachably fixing the first connecting member to the flange plate;

8. The flange structure for a heat exchanger according to any one of claims 2 to 6, wherein the first connecting member is a regular polygonal plate; or/and the second connecting piece is a regular polygonal plate.

9. The flange structure for a heat exchanger according to any one of claims 2 to 6, wherein the flange is a circular disc, and the flange is used for being fixed to a heat exchanger; the liquid inlet through hole and the liquid outlet through hole are both round holes.

10. A liquid treatment installation comprising a flange structure for a heat exchanger according to any one of claims 1 to 9.