A filtering adapter and a preparation method thereof

Abstract

This application relates to the field of carbon fiber composite material preparation. More specifically, it relates to a filter adapter and its preparation method. A filter adapter includes an air inlet pipe and an air outlet pipe. The air inlet pipe includes a first air inlet pipe and a second air inlet pipe. One end of the first air inlet pipe is fixedly connected to one end of the second air inlet pipe and integrally formed. A first connecting pipe and a second connecting pipe are fixedly connected to the outer side wall of the second air inlet pipe. Both the first connecting pipe and the second connecting pipe are communicated with the second air inlet pipe. A first connecting nut is fixedly connected inside the first connecting pipe, and the first connecting pipe and the first connecting nut are integrally formed. A second connecting nut is fixedly connected inside the second connecting pipe, and the second connecting pipe and the second connecting nut are integrally formed. Its preparation method is: use a special mold for the filter adapter to prepare the filter adapter. After closing the mold, inflate, pressurize and heat. Demold, and then carry out grinding to obtain the filter adapter, which has the advantage of improving the connection strength between the filter adapter and the connecting nut.

Description

Technical Field

[0001] This application relates to the field of carbon fiber composite material preparation, and more specifically, to a filter adapter and a preparation method thereof. Background Art

[0002] A filter adapter is a component used in an automotive engine system, and its working environment is a high-temperature and high-pressure environment. Therefore, there are certain requirements for the strength of its material, and its main materials are metal materials, plastic materials, etc.

[0003] The connection between the filter adapter and other accessories is achieved by installing a connection nut on the filter adapter and fixedly connecting it with other accessories through the connection nut. However, the connection nuts made of metal or plastic materials are installed after the filter adapter is formed. However, the connection strength between the subsequently installed connection nut and the filter adapter is relatively low. After long-term use, the connection strength between the connection nut and the filter adapter will decrease, resulting in a decrease in the connection strength between the filter adapter and other accessories. This will cause the filtered gas to leak and the automotive engine system to malfunction. Summary of the Invention

[0004] In order to improve the connection strength between the filter adapter and the connection nut, this application provides a filter adapter and a preparation method thereof.

[0005] In a first aspect, this application provides a filter adapter, adopting the following technical solution:

[0006] A filter adapter includes an intake pipe and an outlet pipe. The intake pipe includes a first intake pipe and a second intake pipe. One end of the first intake pipe is fixedly connected and integrally formed with one end of the second intake pipe. The end of the second intake pipe far from the first intake pipe is fixedly connected and integrally formed with the outlet pipe. A first connection pipe and a second connection pipe are fixedly connected to the outer side wall of the second intake pipe. Both the first connection pipe and the second connection pipe communicate with the second intake pipe. A first connection nut is fixedly connected inside the first connection pipe, and the first connection pipe is integrally formed with the first connection nut. A second connection nut is fixedly connected inside the second connection pipe, and the second connection pipe is integrally formed with the second connection nut.

[0007] By adopting the above technical solution, since both the first connection pipe and the second connection pipe are fixedly connected and integrally formed with the connection nut, the connection strength between the connection nut and the filter adapter is high, making the quality of the filter adapter higher. And there is no need to install the connection nut on the filter adapter later, and it can be formed at one time, which improves the production efficiency of the filter adapter.

[0008] Preferably, an angle is provided between the first air inlet pipe and the second air inlet pipe, and the connection part is arc-shaped. The inner diameter of the first air inlet pipe is larger than that of the second air inlet pipe, and the inner diameter gradually decreases from the end of the first air inlet pipe away from the second air inlet pipe to the end of the second air inlet pipe facing the air outlet pipe.

[0009] By adopting the above technical solution, the air inlet end of the first air inlet pipe and the air outlet end of the second air inlet pipe are from large to small, making it easier to collect and transport gas.

[0010] Preferably, the internal carbon fiber tissue layer structures formed by the air inlet pipe, the air outlet pipe, the first connecting pipe, and the second connecting pipe are the same; taking the air inlet pipe as an example, the air inlet pipe includes an upper warp-knitted resin-impregnated carbon fiber cloth, a lower warp-knitted resin-impregnated carbon fiber cloth, a 0° resin-impregnated carbon fiber cloth, and a 90° resin-impregnated carbon fiber cloth; the 0° resin-impregnated carbon fiber cloth is integrally formed between the upper warp-knitted resin-impregnated carbon fiber cloth and the lower warp-knitted resin-impregnated carbon fiber cloth; the 90° resin-impregnated carbon fiber cloth is integrally formed between the 0° resin-impregnated carbon fiber cloth and the lower warp-knitted resin-impregnated carbon fiber cloth.

[0011] By adopting the above technical solution, the mechanical strength, corrosion resistance, and high-temperature resistance of the filter adapter can be improved, and the overall quality of the filter adapter is lighter, making it more convenient for installation and disassembly.

[0012] In a second aspect, the present application provides a preparation method of a filter adapter, adopting the following technical solution:

[0013] A preparation method of a filter adapter includes the following steps:

[0014] Step 1, use a special mold for the filter adapter to prepare the filter adapter, so that the air inlet pipe, the air outlet pipe, the first connecting pipe, and the second connecting pipe are integrally formed. The special mold includes an upper mold and a lower mold. On both the upper mold and the lower mold, an upper warp-knitted resin-impregnated carbon fiber cloth, a lower warp-knitted resin-impregnated carbon fiber cloth, a 0° resin-impregnated carbon fiber cloth, a 90° resin-impregnated carbon fiber cloth, and a connecting nut are sequentially laid. After closing the mold, the special mold is inflated and pressurized, and heated.

[0015] Step 2: After pressure heating and forming, demold, and then polish to obtain the filter adapter.

[0016] By adopting the above technical solution, a special mold is used to prepare the filter adapter. Through the cooperation of the upper mold and the lower mold, the upper warp-knitted resin-impregnated carbon fiber cloth, the lower warp-knitted resin-impregnated carbon fiber cloth, the 0° resin-impregnated carbon fiber cloth, and the 90° resin-impregnated carbon fiber cloth are laid in sequence, and a connecting nut is also laid, so that the connecting nut can be formed in the mold together with the carbon fiber cloth, and the carbon fiber cloth wraps the connecting nut to protect the connecting nut, so that the connecting nut can have a relatively high connection strength with the filter adapter, prevent the connecting nut from being corroded, and eliminate the step of installing the connecting nut.

[0017] Preferably, the special mold includes an upper mold and a lower mold. The upper mold is sequentially provided with a pressurized air inlet upper cavity, a first air inlet pipe upper cavity, a second air inlet pipe upper cavity, an air outlet pipe upper cavity, a first connecting pipe upper cavity, and a second connecting pipe upper cavity. The connection modes of the first air inlet pipe upper cavity, the second air inlet pipe upper cavity, the air outlet pipe upper cavity, the first connecting pipe upper cavity, and the second connecting pipe upper cavity are the same as those of the first air inlet pipe, the second air inlet pipe, the air outlet pipe, the first connecting pipe, and the second connecting pipe and are all interconnected; one end face of the first air inlet pipe upper cavity far from the second air inlet pipe upper cavity is a quarter spherical surface, the pressurized air inlet upper cavity is a semi-cylindrical shape, the pressurized air inlet upper cavity is vertically arranged on the end face of the second air inlet pipe upper cavity and is located at the middle position of the end face of the second air inlet pipe upper cavity; one end face of the air outlet pipe upper cavity far from the second air inlet pipe upper cavity is a quarter spherical surface.

[0018] By adopting the above technical solution, the end faces of the first air inlet pipe upper cavity and the air outlet pipe upper cavity are both quarter spherical surfaces, so that when the first air inlet pipe upper cavity and the air outlet pipe upper cavity are formed, enough space can be left in the mold to make the filter adapter better formed.

[0019] Preferably, the bottom wall of the first connecting pipe upper cavity is provided with a first semi-cylindrical upper cavity, a second semi-cylindrical upper cavity, and a third connecting upper cavity. The third connecting upper cavity is communicated with the second air inlet pipe upper cavity. The second semi-cylindrical upper cavity is located between the first semi-cylindrical upper cavity and the third connecting upper cavity. The bottom wall of the first connecting pipe upper cavity is inclined and the third connecting upper cavity is higher than the first semi-cylindrical upper cavity and the second semi-cylindrical upper cavity; the inner diameter of the second semi-cylindrical upper cavity is larger than the inner diameter of the first semi-cylindrical upper cavity; the second connecting pipe upper cavity includes a fourth semi-cylindrical upper cavity, a fifth semi-cylindrical upper cavity, and a sixth connecting upper cavity. The sixth connecting upper cavity is communicated with the second air inlet pipe upper cavity. The fifth semi-cylindrical upper cavity is located between the fourth semi-cylindrical upper cavity and the sixth connecting upper cavity. The inner diameter of the fifth semi-cylindrical upper cavity is larger than the inner diameter of the fourth semi-cylindrical upper cavity.

[0020] By adopting the above technical solution, the upper cavity of the first connecting pipe is divided into a first semi-cylindrical upper cavity, a second semi-cylindrical upper cavity, and a third connecting upper cavity. The inner diameter of the second semi-cylindrical upper cavity is greater than that of the first semi-cylindrical upper cavity, enabling the connecting nut to be well inserted into the first connecting pipe, and the third connecting upper cavity allows pressurized air to enter the upper cavity of the first connecting pipe, causing the carbon fiber cloth to tightly connect the connecting nut.

[0021] Preferably, the following cavities are sequentially formed on the lower mold: a pressurized air inlet lower cavity, a first air inlet pipe lower cavity, a second air inlet pipe lower cavity, an air outlet pipe lower cavity, a first connecting pipe lower block, and a second connecting pipe lower cavity. The connection modes of the first air inlet pipe lower cavity, the second air inlet pipe lower cavity, the air outlet pipe lower cavity, the first connecting pipe lower block, and the second connecting pipe lower cavity are the same as those of the first air inlet pipe, the second air inlet pipe, the air outlet pipe, the first connecting pipe, and the second connecting pipe and are all interconnected. The first connecting pipe lower block can be inserted into the upper cavity of the first connecting pipe; one end face of the first air inlet pipe lower cavity far from the second air inlet pipe lower cavity is spherical with a quarter of a sphere, the pressurized air inlet lower cavity is semi-cylindrical, and the pressurized air inlet lower cavity is vertically arranged at the end face of the second air inlet pipe lower cavity and is located at the middle position of the end face of the second air inlet pipe lower cavity; one end face of the air outlet pipe lower cavity far from the second air inlet pipe lower cavity is spherical with a quarter of a sphere.

[0022] By adopting the above technical solution, the lower mold and the upper mold cooperate with each other, and the formed cavities correspond to each other, enabling the filter adapter to be better formed.

[0023] Preferably, the first connecting pipe lower block is provided with a first semi-cylindrical lower cavity, a second semi-cylindrical lower cavity, and a third connecting lower cavity. The third connecting lower cavity is communicated with the second air inlet pipe lower cavity. The second semi-cylindrical lower cavity is located between the first semi-cylindrical lower cavity and the third connecting lower cavity. The top wall of the first connecting pipe lower block is inclined and the third connecting lower cavity is lower than the first semi-cylindrical lower cavity and the second semi-cylindrical lower cavity; the inner diameter of the second semi-cylindrical upper cavity is greater than that of the first semi-cylindrical upper cavity; the second connecting pipe lower cavity includes a fourth semi-cylindrical lower cavity, a fifth semi-cylindrical lower cavity, and a sixth connecting lower cavity. The sixth connecting lower cavity is communicated with the second air inlet pipe lower cavity. The fifth semi-cylindrical lower cavity is located between the fourth semi-cylindrical lower cavity and the sixth connecting lower cavity, and the inner diameter of the fifth semi-cylindrical lower cavity is greater than that of the fourth semi-cylindrical lower cavity.

[0024] In summary, the present application has the following beneficial effects:

[0025] 1. Since the first connecting pipe and the second connecting pipe in the present application are both fixedly connected to the connecting nut and integrally formed, the connection strength between the connecting nut and the filter adapter is high, which improves the production efficiency of the filter adapter and also makes the quality of the filter adapter higher.

[0026] 2. In this application, it is preferred to use carbon fiber cloth to prepare the filter adapter, so that the strength and pressure resistance of the filter adapter are improved, and the quality of the filter adapter is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the filter adapter in the embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the internal structure of the first connecting pipe and the second connecting pipe in the filter adapter in the embodiment of the present application;

[0029] Figure 3 is a schematic diagram of the constituent structure of the filter adapter in the embodiment of the present application;

[0030] Figure 4 is a schematic diagram of the overall structure of the upper mold in the embodiment of the present application;

[0031] Figure 5 is a schematic diagram of the structure of the upper cavity of the first connecting pipe in the upper mold in the embodiment of the present application;

[0032] Figure 6 is a schematic diagram of the overall structure of the lower mold in the embodiment of the present application.

[0033] 01. Upper layer warp knitted resin impregnated carbon fiber cloth; 02. Lower layer warp knitted resin impregnated carbon fiber cloth; 03. 0° resin impregnated carbon fiber cloth; 04. 90° resin impregnated carbon fiber cloth; 1. Air inlet pipe; 11. First air inlet pipe; 12. Second air inlet pipe; 2. Air outlet pipe; 3. First connecting pipe; 31. First connecting nut; 4. Second connecting pipe; 41. Second connecting nut; 5. Upper mold; 50. Pressurized air inlet upper cavity; 51. First air inlet pipe upper cavity; 52. Second air inlet pipe upper cavity; 53. Air outlet pipe upper cavity; 54. First connecting pipe upper cavity; 541. First semi-cylindrical upper cavity; 542. Second semi-cylindrical upper cavity; 543. Third connecting upper cavity; 55. Second connecting pipe upper cavity; 551. Fourth semi-cylindrical upper cavity; 552. Fifth semi-cylindrical upper cavity; 553. Sixth connecting upper cavity; 6. Lower mold; 60. Pressurized air inlet lower cavity; 61. First air inlet pipe lower cavity; 62. Second air inlet pipe lower cavity; 63. Air outlet pipe lower cavity; 64. First connecting pipe lower block; 641. First semi-cylindrical lower cavity; 642. Second semi-cylindrical lower cavity; 643. Third connecting lower cavity; 65. Second connecting pipe lower cavity; 651. Fourth semi-cylindrical lower cavity; 652. Fifth semi-cylindrical lower cavity; 653. Sixth connecting lower cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present application will be further described in detail below with reference to the accompanying drawings x-x and embodiments. Embodiment

[0035] Refer toFigure 1 , a filtering adapter disclosed in the present application, includes an intake pipe 1, an exhaust pipe 2, a first connecting pipe 3 and a second connecting pipe 4. The intake pipe 1, the exhaust pipe 2, the first connecting pipe 3 and the second connecting pipe 4 are integrally formed and fixed, and the cross-section of each part is circular.

[0036] Refer to Figure 1 , the end faces of the intake pipe 1 and the exhaust pipe 2 are flat. The intake pipe 1 includes two parts, a first intake pipe 11 and a second intake pipe 12. The first intake pipe 11 and the second intake pipe 12 are integrally formed and fixed. The inner diameter of the first intake pipe 11 at the end far from the second intake pipe 12 gradually decreases to the inner diameter of the second intake pipe 12 at the end far from the first intake pipe 11. The inner diameter of each part of the first intake pipe 11 is larger than the inner diameter of each part of the second intake pipe 12. The first intake pipe 11 and the second intake pipe 12 are arranged at an angle and the connection part is an arc surface, and the included angle at the connection part is an obtuse angle.

[0037] Refer to Figure 2 , the exhaust pipe 2 is cylindrical. One end of the exhaust pipe 2 is fixedly connected to the end of the second intake pipe 12 far from the first intake pipe 11 and is integrally formed. A first connecting nut 31 is fixedly connected inside the first connecting pipe 3 and is integrally formed. A second connecting nut 41 is fixedly connected inside the second connecting pipe 4 and is integrally formed. The first connecting pipe 3 and the second connecting pipe 4 are perpendicularly and fixedly connected to the outer surface of the second intake pipe 12 and are both communicated with the second intake pipe 12. The first connecting pipe 3 is located at the end of the second intake pipe 12 close to the first intake pipe 11, and the second connecting pipe 4 is located at the end of the second intake pipe 12 close to the exhaust pipe 2. The first connecting pipe 3 and the second connecting pipe 4 are both located on one side of the connection angle between the first intake pipe 11 and the second intake pipe 12. The inner diameter of the first connecting pipe 3 is larger than the inner diameter of the second connecting pipe 4, and the inner diameter of the first connecting nut 31 is also larger than the inner diameter of the second connecting nut 41.

[0038] Refer to Figure 2 and Figure 3 , the internal carbon fiber tissue layer structure formed by the intake pipe 1, the exhaust pipe 2, the first connecting pipe and the second connecting pipe is the same. Taking the intake pipe 1 as an example, the intake pipe 1 includes an upper layer warp knitted resin impregnated carbon fiber cloth 01, a lower layer warp knitted resin impregnated carbon fiber cloth 02, a 0° resin impregnated carbon fiber cloth 03, and a 90° resin impregnated carbon fiber cloth 04; the 0° resin impregnated carbon fiber cloth 03 is integrally formed between the upper layer warp knitted resin impregnated carbon fiber cloth 01 and the lower layer warp knitted resin impregnated carbon fiber cloth 02; the 90° resin impregnated carbon fiber cloth 04 is integrally formed between the 0° resin impregnated carbon fiber cloth 03 and the lower layer warp knitted resin impregnated carbon fiber cloth 02.

[0039] Refer to Figure 2 and Figure 4, the special mold includes the upper mold 5 which is a cuboid. On one side of the upper mold 5, there are successively arranged a pressurized air inlet upper cavity 50, a first air inlet pipe upper cavity 51, a second air inlet pipe upper cavity 52, an air outlet pipe upper cavity 53, a first connecting pipe upper cavity 54, and a second connecting pipe upper cavity 55 from one end to the other end of the upper mold 5. The arrangement modes of the first air inlet pipe upper cavity 51, the second air inlet pipe upper cavity 52, the air outlet pipe upper cavity 53, the first connecting pipe upper cavity 54, and the second connecting pipe upper cavity 55 are the same as those of the first air inlet pipe 11, the second air inlet pipe 12, the air outlet pipe 2, the first connecting pipe 3, and the second connecting pipe 4 in sequence. The pressurized air inlet upper cavity 50, the first air inlet pipe upper cavity 51, the second air inlet pipe upper cavity 52, the air outlet pipe upper cavity 53, the first connecting pipe upper cavity 54, and the second connecting pipe upper cavity 55 are all interconnected with each other.

[0040] One end face of the first air inlet pipe upper cavity 51 far from the second air inlet pipe upper cavity 52 is a quarter spherical surface, and the cross-section of the remaining part of the first air inlet pipe upper cavity 51 is a semi-circular shape. One end face of the air outlet pipe upper cavity 53 far from the second air inlet pipe upper cavity 52 is also a quarter spherical surface. The inner diameter of the end of the first air inlet pipe upper cavity 51 is larger than that of the end of the air outlet pipe upper cavity 53; the pressurized air inlet upper cavity 50 is semi-cylindrical, and the pressurized air inlet upper cavity 50 is vertically arranged on the end face of the second air inlet pipe upper cavity 52 and is located at the middle position of the end face of the second air inlet pipe upper cavity 52; the first air inlet pipe upper cavity 51 and the second air inlet pipe upper cavity 52 are arranged at an angle and the connection part is an arc surface, and the angle is the same as the included angle between the first air inlet pipe 11 and the second air inlet pipe 12. The inner diameter from the end of the first air inlet pipe upper cavity 51 far from the second air inlet pipe upper cavity 52 to the end of the second air inlet pipe upper cavity 52 far from the first air inlet pipe upper cavity 51 gradually decreases, and the decreasing amplitude is the same as the decreasing amplitude of the inner diameters of the first air inlet pipe 11 and the second air inlet pipe 12.

[0041] Refer to Figure 5 , the first connecting pipe upper cavity 54 includes a first semi-cylindrical upper cavity 541, a second semi-cylindrical upper cavity 542, and a third connecting upper cavity 543. The third connecting upper cavity 543 is communicated with the second air inlet pipe upper cavity 52. The second semi-cylindrical upper cavity 542 is located between the first semi-cylindrical upper cavity 541 and the third connecting upper cavity 543. The first connecting pipe upper cavity 54 is inclinedly arranged and the third connecting upper cavity 543 is higher than the first semi-cylindrical upper cavity 541 and the second semi-cylindrical upper cavity 542; the inner diameter of the second semi-cylindrical upper cavity 542 is larger than that of the first semi-cylindrical upper cavity 541; the second connecting pipe upper cavity 55 includes a fourth semi-cylindrical upper cavity 551, a fifth semi-cylindrical upper cavity 552, and a sixth connecting upper cavity 553. The sixth connecting upper cavity 553 is communicated with the second air inlet pipe upper cavity 52. The fifth semi-cylindrical upper cavity 552 is located between the fourth semi-cylindrical upper cavity 551 and the sixth connecting upper cavity 553. The inner diameter of the fifth semi-cylindrical upper cavity 552 is larger than that of the fourth semi-cylindrical upper cavity 551.

[0042] Refer toFigure 5 and Figure 6 The special mold further includes a lower mold 6 which is a cuboid. The lower mold 6 is successively provided with a pressurized air inlet lower cavity 60, a first air inlet pipe lower cavity 61, a second air inlet pipe lower cavity 62, an air outlet pipe lower cavity 63, a second connecting pipe lower cavity 65, and a first connecting pipe lower block 64 is fixed. The first connecting pipe lower block 64 can be inserted into the first connecting pipe upper cavity 54 so that the upper mold 5 and the lower mold 6 are accurately closed. The arrangement modes of the first air inlet pipe lower cavity 61, the second air inlet pipe lower cavity 62, the air outlet pipe lower cavity 63, the first connecting pipe lower block 64, and the second connecting pipe lower cavity 65 are the same as and correspond one by one to the arrangement modes of the pressurized air inlet upper cavity 50, the first air inlet pipe upper cavity 51, the second air inlet pipe upper cavity 52, the air outlet pipe upper cavity 53, the first connecting pipe upper cavity 54, and the second connecting pipe upper cavity 55. The pressurized air inlet lower cavity 60, the first air inlet pipe lower cavity 61, the second air inlet pipe lower cavity 62, the air outlet pipe lower cavity 63, the second connecting pipe lower cavity 65, and the first connecting pipe lower block 64 are all interconnected.

[0043] Refer to Figure 5 and Figure 6 As shown in FIGS. and, one end face of the first air inlet pipe lower cavity 61 away from the second air inlet pipe lower cavity 62 is spherical with a quarter of a sphere, the pressurized air inlet lower cavity 60 is semi-cylindrical, the pressurized air inlet lower cavity 60 is vertically arranged on the end face of the second air inlet pipe lower cavity 62 and is located at the middle position of the end face of the second air inlet pipe lower cavity 62; one end face of the air outlet pipe lower cavity 63 away from the second air inlet pipe lower cavity 62 is spherical with a quarter of a sphere. When the upper mold 5 and the lower mold 6 are closed, the pressurized air inlet lower cavity 60, the first air inlet pipe lower cavity 61, the second air inlet pipe lower cavity 62, the air outlet pipe lower cavity 63, the first connecting pipe lower block 64, and the second connecting pipe lower cavity 65 correspond one by one to the pressurized air inlet upper cavity 50, the first air inlet pipe upper cavity 51, the second air inlet pipe upper cavity 52, the air outlet pipe upper cavity 53, the first connecting pipe upper cavity 54, and the second connecting pipe upper cavity 55 and can be closely closed. Among them, the second connecting pipe lower cavity 65 and the second connecting pipe upper cavity 55 can form a complete hollow cylinder, and the pressurized air inlet lower cavity 60 and the pressurized air inlet upper cavity 50 can also form a complete hollow cylinder.

[0044] Refer to Figure 5 and Figure 6, the lower block 64 of the first connecting pipe is provided with a first semi-cylindrical lower cavity 641, a second semi-cylindrical lower cavity 642, and a third connecting lower cavity 643. The third connecting lower cavity 643 communicates with the second lower cavity 62 of the intake pipe. The second semi-cylindrical lower cavity 642 is located between the first semi-cylindrical lower cavity 641 and the third connecting lower cavity 643. The top wall of the lower block 64 of the first connecting pipe is inclined, and the third connecting lower cavity 643 is lower than the first semi-cylindrical lower cavity 641 and the second semi-cylindrical lower cavity 642. The inner diameter of the second semi-cylindrical lower cavity 642 is larger than the inner diameter of the first semi-cylindrical lower cavity 641. The second connecting pipe lower cavity 65 includes a fourth semi-cylindrical lower cavity 651, a fifth semi-cylindrical lower cavity 652, and a sixth connecting lower cavity 653. The sixth connecting lower cavity 653 communicates with the second lower cavity 62 of the intake pipe. The fifth semi-cylindrical lower cavity 652 is located between the fourth semi-cylindrical lower cavity 651 and the sixth connecting lower cavity 653. The inner diameter of the fifth semi-cylindrical lower cavity 652 is larger than the inner diameter of the fourth semi-cylindrical lower cavity 651. When the lower block 64 of the first connecting pipe is inserted into the upper cavity 54 of the first connecting pipe, the first semi-cylindrical lower cavity 641, the second semi-cylindrical lower cavity 642, and the third connecting lower cavity 643 correspond to the first semi-cylindrical upper cavity 541, the second semi-cylindrical upper cavity 542, and the third connecting upper cavity 543 one by one and can form a complete hollow cylinder.

[0045] A method for preparing a filter adapter includes the following steps:

[0046] Step 1, lay the upper layer warp knitted resin-impregnated carbon fiber cloth 01, the lower layer warp knitted resin-impregnated carbon fiber cloth 02, the 0° resin-impregnated carbon fiber cloth 03, and the 90° resin-impregnated carbon fiber cloth 04 on both the upper mold 5 and the lower mold 6 in sequence. Then place the first connecting nut 31 on the upper cavity 54 of the first connecting pipe, so that one end of the first connecting nut 31 abuts against the bottom wall of the first semi-cylindrical upper cavity 541. Place the second connecting nut 41 on the upper cavity 55 of the second connecting pipe, so that one end of the second connecting nut 41 abuts against the bottom wall of the fourth semi-cylindrical upper cavity 551. Then perform mold closing. Insert the pressurized pipe of the upper press into the upper mold 5 and the lower mold 6 after mold closing through the pressurized intake upper cavity 50 and the pressurized intake lower cavity 60, and perform inflation and pressurization. The pressurization speed should not be too fast, the pressure is 0.2 MPa, and the heating temperature is 145 °C. Among them, the upper layer warp knitted resin-impregnated carbon fiber cloth and the lower layer warp knitted resin-impregnated carbon fiber cloth are specifically 3K twill warp knitted carbon fiber resin-impregnated cloth. The 0° resin-impregnated carbon fiber cloth is 1500# UD, and the carbon fibers are arranged along the 0° direction. The 90° resin-impregnated carbon fiber cloth is 1500# UD, and the carbon fibers are arranged along the 90° direction.

[0047] Step 2: After pressurization and heating for 30 s, relieve the pressure, then pressurize to 0.4 MPa, maintain at 145 °C for 250 s, then release the gas and relieve the pressure, open the mold and demold, and then polish the product to obtain a filter adapter. The filter adapter prepared in this application is not damaged under a pressure of 0.3 MPa and can work at a temperature of 70 °C.

[0048] This specific embodiment is only an interpretation of this application and does not limit this application. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A filtering adapter, characterized in that, It includes an intake pipe (1) and an exhaust pipe (2). The intake pipe (1) includes a first intake pipe (11) and a second intake pipe (12). One end of the first intake pipe (11) is fixedly connected and integrally formed with one end of the second intake pipe (12). The end of the second intake pipe (12) far from the first intake pipe (11) is fixedly connected and integrally formed with the exhaust pipe (2). A first connecting pipe (3) and a second connecting pipe (4) are fixedly connected to the outer side wall of the second intake pipe (12). Both the first connecting pipe (3) and the second connecting pipe (4) communicate with the second intake pipe (12). A first connecting nut (31) is fixedly connected inside the first connecting pipe (3), and the first connecting pipe (3) is integrally formed with the first connecting nut (31). A second connecting nut (41) is fixedly connected inside the second connecting pipe (4), and the second connecting pipe (4) is integrally formed with the second connecting nut (41). An angle is formed between the first intake pipe (11) and the second intake pipe (12), and the connection part is arc-shaped. The inner diameter of the first intake pipe (11) is larger than that of the second intake pipe (12). The inner diameter gradually decreases from the end of the first intake pipe (11) far from the second intake pipe (12) to the end of the second intake pipe (12) facing the exhaust pipe (2). The internal carbon fiber tissue layer structures formed by the intake pipe (1), the exhaust pipe (2), the first connecting pipe (3), and the second connecting pipe (4) are the same. Taking the intake pipe (1) as an example, the intake pipe (1) includes an upper warp knitted resin-impregnated carbon fiber cloth (01), a lower warp knitted resin-impregnated carbon fiber cloth (02), a 0° resin-impregnated carbon fiber cloth (03), and a 90° resin-impregnated carbon fiber cloth (04). The 0° resin-impregnated carbon fiber cloth (03) is integrally formed between the upper warp knitted resin-impregnated carbon fiber cloth (01) and the lower warp knitted resin-impregnated carbon fiber cloth (02). The 90° resin-impregnated carbon fiber cloth (04) is integrally formed between the 0° resin-impregnated carbon fiber cloth (03) and the lower warp knitted resin-impregnated carbon fiber cloth (02).

2. A method for preparing a filter adapter, based on the filter adapter described in claim 1, characterized in that: It includes the following steps: Step 1: Prepare a filter adapter using a special mold for the filter adapter, and integrally form the intake pipe (1), the exhaust pipe (2), the first connecting pipe (3), and the second connecting pipe (4). The special mold includes an upper mold (5) and a lower mold (6). The upper warp knitted resin-impregnated carbon fiber cloth (01), the lower warp knitted resin-impregnated carbon fiber cloth (02), the 0° resin-impregnated carbon fiber cloth (03), the 90° resin-impregnated carbon fiber cloth (04), and the connecting nuts are sequentially laid on the upper mold (5) and the lower mold (6). After closing the mold, the special mold is inflated and pressurized and heated. Step 2: After pressure heating and forming, demold, and then polish to obtain the filter adapter.

3. The preparation method of a filtering adapter according to claim 2, characterized in that: The special mold includes an upper mold (5) and a lower mold (6). The upper mold (5) is successively provided with a pressurized air inlet upper cavity (50), a first air inlet pipe upper cavity (51), a second air inlet pipe upper cavity (52), an air outlet pipe upper cavity (53), a first connecting pipe upper cavity (54), and a second connecting pipe upper cavity (55). The connection modes of the first air inlet pipe upper cavity (51), the second air inlet pipe upper cavity (52), the air outlet pipe upper cavity (53), the first connecting pipe upper cavity (54), and the second connecting pipe upper cavity (55) are the same as those of the first air inlet pipe (11), the second air inlet pipe (12), the air outlet pipe (2), the first connecting pipe (3), and the second connecting pipe (4) and are all interconnected; one end face of the first air inlet pipe upper cavity (51) far from the second air inlet pipe upper cavity (52) is a quarter spherical surface, the pressurized air inlet upper cavity (50) is semi-cylindrical, the pressurized air inlet upper cavity (50) is vertically arranged on the end face of the second air inlet pipe upper cavity (52) and is located at the middle position of the end face of the second air inlet pipe upper cavity (52); one end face of the air outlet pipe upper cavity (53) far from the second air inlet pipe upper cavity (52) is a quarter spherical surface.

4. The preparation method of a filtering adapter according to claim 3, wherein: On the bottom wall of the first connecting pipe upper cavity (54), a first semi-cylindrical upper cavity (541), a second semi-cylindrical upper cavity (542), and a third connecting upper cavity (543) are provided. The third connecting upper cavity (543) is communicated with the second air inlet pipe upper cavity (52). The second semi-cylindrical upper cavity (542) is located between the first semi-cylindrical upper cavity (541) and the third connecting upper cavity (543). The bottom wall of the first connecting pipe upper cavity (54) is inclined and the third connecting upper cavity (543) is higher than the first semi-cylindrical upper cavity (541) and the second semi-cylindrical upper cavity (542); the inner diameter of the second semi-cylindrical upper cavity (542) is larger than the inner diameter of the first semi-cylindrical upper cavity (541); the second connecting pipe upper cavity (55) includes a fourth semi-cylindrical upper cavity (551), a fifth semi-cylindrical upper cavity (552), and a sixth connecting upper cavity (553). The sixth connecting upper cavity (553) is communicated with the second air inlet pipe upper cavity (52). The fifth semi-cylindrical upper cavity (552) is located between the fourth semi-cylindrical upper cavity (551) and the sixth connecting upper cavity (553). The inner diameter of the fifth semi-cylindrical upper cavity (552) is larger than the inner diameter of the fourth semi-cylindrical upper cavity (551).

5. The preparation method of a filter adapter according to claim 3, characterized in that: The following die (6) is successively provided with a pressurized air inlet lower cavity (60), a first air inlet pipe lower cavity (61), a second air inlet pipe lower cavity (62), and an air outlet pipe lower cavity (63), and is fixed with a first connecting pipe lower block (64) and a second connecting pipe lower cavity (65). The connection modes of the first air inlet pipe lower cavity (61), the second air inlet pipe lower cavity (62), the air outlet pipe lower cavity (63), the first connecting pipe lower block (64), and the second connecting pipe lower cavity (65) are the same as those of the first air inlet pipe (11), the second air inlet pipe (12), the air outlet pipe (2), the first connecting pipe (3), and the second connecting pipe (4), and they are all interconnected. The first connecting pipe lower block (64) can be inserted into the first connecting pipe upper cavity (54). One end face of the first air inlet pipe lower cavity (61) away from the second air inlet pipe lower cavity (62) is spherical with a quarter of a sphere shape. The pressurized air inlet lower cavity (60) is semi-cylindrical. The pressurized air inlet lower cavity (60) is vertically arranged at the end face of the second air inlet pipe lower cavity (62) and is located at the middle position of the end face of the second air inlet pipe lower cavity (62). One end face of the air outlet pipe lower cavity (63) away from the second air inlet pipe lower cavity (62) is spherical with a quarter of a sphere shape.

6. The preparation method of a filtering adapter according to claim 5, wherein: The first connecting pipe lower block (64) is provided with a first semi-cylindrical lower cavity (641), a second semi-cylindrical lower cavity (642), and a third connecting lower cavity (643). The third connecting lower cavity (643) is communicated with the second air inlet pipe lower cavity (62). The second semi-cylindrical lower cavity (642) is located between the first semi-cylindrical lower cavity (641) and the third connecting lower cavity (643). The top wall of the first connecting pipe lower block (64) is inclined, and the third connecting lower cavity (643) is lower than the first semi-cylindrical lower cavity (641) and the second semi-cylindrical lower cavity (642). The inner diameter of the second semi-cylindrical cavity (642) is larger than the inner diameter of the first semi-cylindrical lower cavity (641). The second connecting pipe lower cavity (65) includes a fourth semi-cylindrical lower cavity (651), a fifth semi-cylindrical lower cavity (652), and a sixth connecting lower cavity (653). The sixth connecting lower cavity (653) is communicated with the second air inlet pipe lower cavity (62). The fifth semi-cylindrical lower cavity (652) is located between the fourth semi-cylindrical lower cavity (651) and the sixth connecting lower cavity (653). The inner diameter of the fifth semi-cylindrical lower cavity (652) is larger than the inner diameter of the fourth semi-cylindrical lower cavity (651).

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