阅读说明：本技术 一种换热器的铸造成型方法 (Casting forming method of heat exchanger ) 是由 吴伟烽 孟欣 杨笑天 张曌 郭天硕 李许旺 何志龙 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种换热器的铸造成型方法,包括步骤：设计中空、实心或部分中空的非金属换热通道；布置设计好的非金属换热通道；向布置好非金属换热通道的空间浇铸换热器金属材料；清洗铸造完成的整个结构,将非金属换热通道溶解、清洗掉。本发明采用铸造的方法加工换热器,加工速度快,流道布置可以更复杂,加工成本低；本发明方法的换热器通道可以设计得更合理、更复杂,制造速度快,制造成本低,换热器的换热效果好。(The invention discloses a casting forming method of a heat exchanger, which comprises the following steps: designing a hollow, solid or partially hollow non-metal heat exchange channel; arranging a designed non-metal heat exchange channel; casting a heat exchanger metal material to the space in which the nonmetal heat exchange channel is arranged; and cleaning the cast whole structure, and dissolving and cleaning the nonmetal heat exchange channel. The heat exchanger is processed by adopting a casting method, the processing speed is high, the flow channel arrangement can be more complicated, and the processing cost is low; the heat exchanger channel of the method of the invention can be designed more reasonably and more complicated, the manufacturing speed is high, the manufacturing cost is low, and the heat exchange effect of the heat exchanger is good.)

1. The casting forming method of the heat exchanger is characterized by comprising the following steps of:

1) designing a hollow, solid or partially hollow non-metal heat exchange channel;

2) arranging a designed non-metal heat exchange channel;

3) casting a heat exchanger metal material to the space in which the nonmetal heat exchange channel is arranged;

4) and cleaning the cast whole structure, and dissolving and cleaning the nonmetal heat exchange channel.

2. The casting forming method of the heat exchanger according to claim 1, wherein in the step 1), the shape of the non-metal heat exchange channel is consistent with the shape of the corresponding heat exchange fluid channel.

3. The casting forming method of a heat exchanger according to claim 1, wherein in step 1), when the non-metal heat exchange channel is in a hollow straight round tube shape, two ends of the non-metal heat exchange channel are plugged with a non-metal material.

4. The casting forming method of the heat exchanger according to claim 1, wherein in the step 2), the non-metal heat exchange channels are arranged and erected in a cavity space enclosed by the sand cavity or other materials according to the spatial structure of the actual heat exchange channels of various heat exchange fluids.

5. The casting forming method of the heat exchanger according to claim 1, wherein in the step 2), the metal heat exchange channels of the same fluid are connected or provided with a space; and spaces are arranged among the metal heat exchange channels of different fluids.

6. The method for casting and forming a heat exchanger according to claim 1, wherein in the step 2), when the non-metal heat exchange channels are arranged, the non-metal heat exchange channels are directly supported and positioned by sand molds or are supported and positioned by various non-metal or metal materials.

7. The method as claimed in claim 6, wherein the non-metallic heat exchange passages are positioned and supported by wires according to the spatial arrangement of the heat exchange passages in the heat exchanger.

8. The method for casting and forming a heat exchanger according to claim 1, wherein in step 3), one or more air holes are arranged on the cavity surrounded by the sand cavity or other materials before casting.

9. The casting forming method of a heat exchanger according to any one of claims 1 to 8, wherein the material of the non-metallic heat exchange passages is a non-metallic material that can be dissolved by an acid; the non-metal heat exchange channel is integrally made of one or more non-metal materials or is made of one or more non-metal materials in sections; the melting point of the non-metallic material is higher than the melting point of the metallic material of the cast heat exchanger.

10. The method for casting and molding a heat exchanger according to claim 9, wherein the material of the non-metallic heat exchange channel is calcium carbonate.

Technical Field

The invention belongs to the field of heat exchangers, and particularly relates to a casting forming method of a heat exchanger.

Background

The heat exchanger is a device widely used in the fields of energy, chemical industry, petroleum, electric power, ships, air conditioning heating and ventilation and the like, is used for exchanging heat of two or more than two fluids with different temperatures, and is one of main energy-saving devices for improving the utilization efficiency of energy. The heat exchangers have various structural forms, and in order to improve the heat exchange efficiency of the heat exchanger, the heat exchange area is increased by a common method, so that the compact heat exchanger with a high heat transfer area is generally applied to micro-channel heat exchangers, printed circuit plate heat exchangers, plate heat exchangers and the like.

At present, heat exchange plates are generally processed by a mechanical or chemical method and are generally connected by a laminating and welding method. The method for manufacturing the heat exchange plate and the flow channel is complex, high in cost, time-consuming and labor-consuming.

Disclosure of Invention

The invention aims to provide a casting forming method of a heat exchanger, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a casting forming method of a heat exchanger comprises the following steps:

1) designing a hollow, solid or partially hollow non-metal heat exchange channel;

2) arranging a designed non-metal heat exchange channel;

3) casting a heat exchanger metal material to the space in which the nonmetal heat exchange channel is arranged;

4) and cleaning the cast whole structure, and dissolving and cleaning the nonmetal heat exchange channel.

Further, in the step 1), the shape of the non-metal heat exchange channel is consistent with the shape of the corresponding heat exchange fluid channel.

Further, in the step 1), when the non-metal heat exchange channel is in a hollow straight round tube shape, two end heads of the non-metal heat exchange channel are plugged with a non-metal material; the non-metallic heat exchange channels are able to withstand the force loads during the casting process.

Further, in the step 2), non-metal heat exchange channels are arranged and erected in a cavity space surrounded by the sand cavity according to the space structure of the actual heat exchange channels of various heat exchange fluids.

Further, in the step 2), metal heat exchange channels of the same fluid are connected or provided with intervals; and spaces are arranged among the metal heat exchange channels of different fluids.

Further, in the step 2), when the non-metal heat exchange channel is arranged, a sand mold is directly used for supporting and positioning, or various non-metal or metal materials are used for supporting and positioning.

Furthermore, the non-metal heat exchange channels are arranged, positioned and supported by metal wires according to the spatial positions of the heat exchange channels in the heat exchanger.

Further, in step 3), one or more air holes are arranged on the sand cavity or the cavity surrounded by other materials before casting.

Furthermore, the non-metal heat exchange channel is made of a non-metal material which can be dissolved by acid; the non-metal heat exchange channel is integrally made of one or more non-metal materials or is made of one or more non-metal materials in sections; the melting point of the non-metallic material is higher than the melting point of the metallic material of the cast heat exchanger.

Furthermore, the material of the non-metal heat exchange channel is calcium carbonate.

The invention has the following beneficial effects:

1. the heat exchanger is processed by adopting a casting method, the processing speed is high, the flow channel arrangement can be more complicated, and the processing cost is low;

2. the heat exchanger channel of the method of the invention can be designed more reasonably and more complicated, the manufacturing speed is high, the manufacturing cost is low, and the heat exchange effect of the heat exchanger is good.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a non-metal heat exchange channel with two unsealed ends according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a non-metal heat exchange channel with two closed ends according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a non-metal heat exchange channel arrangement according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a heat exchanger after casting according to an embodiment of the present invention;

wherein the reference numerals of figures 1-4 are: 1. a non-metal heat exchange channel with two unsealed ends; 2. a non-metal heat exchange channel with two closed ends; 3. non-metallic heat exchange channels for a first fluid; 4. a non-metallic heat exchange channel for a second fluid; 5. a sand cavity; 6. casting metal; 7. a non-metal heat exchange channel after casting; 8. a hollow channel.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.

A casting forming method of a heat exchanger comprises the following steps: 1) the method comprises four steps of non-metal heat exchange channel forming, 2) non-metal heat exchange channel arrangement, 3) casting and 4) non-metal heat exchange channel cleaning.

The material of the non-metal heat exchange channel refers to a non-metal material which can be dissolved by certain acid, such as calcium carbonate or a mixture thereof; one or more non-metallic materials may be used in the manufacture of a heat exchanger; the non-metal heat exchange channel can be made of one or more non-metal materials, and can also be made of one or more non-metal materials in sections; the melting point of the non-metallic material is higher than the melting point of the metallic material of the cast heat exchanger.

Step 1 refers to designing and manufacturing the hollow or solid or partially hollow non-metal heat exchange channel. The shape of the non-metal heat exchange channel is designed according to the shape of a cold or hot fluid channel of an actual heat exchanger finished product; the non-metal heat exchange channels are provided with a plurality of shapes, the shape of each channel is the same as that of a part of cold or hot fluid channel, and the channel shape of the whole cold or hot fluid channel is formed after splicing; each non-metallic heat exchange channel represents a heat exchange fluid channel whose overall shape conforms to the shape of such heat exchange fluid channel. When the heat exchange channel is designed into a straight round tube shape, the axial section of a single non-metal heat exchange channel 1 with two unclosed ends is shown in figure 1. The interior of the non-metal heat exchange channel 1 with two unsealed ends is hollow, and the non-metal heat exchange channel is made of the non-metal material. In order to ensure that the metal material cast during casting does not flow into the hollow interior of the non-metal heat exchange channel 1 with two unsealed ends, the non-metal heat exchange channel can be designed in a form of the non-metal heat exchange channel 2 with two sealed ends as shown in fig. 2, that is, two ends of the non-metal heat exchange channel 1 with two unsealed ends are blocked by the non-metal material. The non-metal heat exchange channel has certain strength and can bear various force loads in the casting process.

Step 2 is to arrange and assemble the nonmetal heat exchange channels in a cavity space enclosed by the sand cavity 5 or other materials according to the space structure of the actual heat exchange channels of various heat exchange fluids. In the arrangement of the nonmetal heat exchange channels, the heat exchange channels of the same fluid can have a certain distance and can also be connected; in the arrangement of the non-metal heat exchange channels, different heat exchange fluid channels are spaced at a certain distance. When the nonmetal heat exchange channels are arranged, the nonmetal heat exchange channels can be directly supported and positioned by sand molds, and also can be supported and positioned by various nonmetal or metal materials. For example, the non-metal heat exchange channels can be positioned and supported by the metal wires according to the spatial position arrangement of the heat exchange channels in the heat exchanger. Figure 3 provides an illustration of the use of sand chambers to support and position non-metallic heat exchange channels. For the clarity of the present invention, only two layers of heat exchange channels of the heat exchanger are shown in the figure, namely a first non-metal heat exchange channel 3 and a second non-metal heat exchange channel 4, which are arranged on the inside of the sand cavity 5. Thus, when metal is cast into the sand cavity 5, the positioning of the first non-metal heat exchange channel 3 and the second non-metal heat exchange channel 4 and the relative positions of the first non-metal heat exchange channel and the second non-metal heat exchange channel can be maintained.

And step 3, casting the metal material of the heat exchanger in the space where the nonmetal heat exchange channel is arranged. Before casting, one or more air holes are arranged on a cavity surrounded by sand cavities or other materials. After casting is complete, the heat exchanger is shown in partial cross-section in FIG. 4. In the figure, the periphery of a non-metal heat exchange channel 7 after casting is wrapped with casting metal 6, and the interior of the non-metal heat exchange channel 7 is a hollow channel 8.

And step 4, putting the cast whole structure into certain liquid for cleaning, and dissolving and cleaning the nonmetal heat exchange channel manufactured in the first working. After the cleaning liquid is introduced into the hollow channel 8 shown in fig. 4, the cleaning liquid dissolves the cast nonmetal heat exchange channel 7 and is removed from the heat exchanger.

After the four steps are finished, the heat exchanger can be machined to be manufactured into a finished heat exchanger product, and the finished heat exchanger product can also be directly used.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.