CN214499228U

CN214499228U - High-temperature-resistant engine cooling water pipe

Info

Publication number: CN214499228U
Application number: CN202023122392.9U
Authority: CN
Inventors: 李勇; 韩晋; 贾宗耀; 李桃牙; 武文博; 姜志洪
Original assignee: Zhejiang Qi Cheng Automobile Parts Co ltd
Current assignee: Zhejiang Qi Cheng Automobile Parts Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-10-26
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses a high temperature resistant engine cooling water pipe, include: the pipe comprises a pipe body, wherein one end of the pipe body is connected with a joint; the joint is connected with an engine connecting interface; the joint is a push lock type joint; the pipe body comprises a first layer of pipes in contact with a cooling liquid, and the first layer of pipes are made of PA 612. The utility model relates to a high temperature resistant engine cooling water pipe adopts PA612 to prepare the inlayer that contacts with the coolant liquid through extrusion molding forming process for this inlet tube can have high elongation at break, good sealing performance, high temperature resistant and low temperature performance. The adoption pushes away lock formula attach fitting and makes it have good anticreep performance.

Description

High-temperature-resistant engine cooling water pipe

Technical Field

The utility model belongs to the technical field of the engine cooling technique and specifically relates to a high temperature resistant engine cooling water pipe.

Background

With the formal execution of the national six regulations, oil saving and environmental protection become technical subjects which are overcome by the emphasis of each large-brand automobile. The small-displacement vortex-energy supercharged engine becomes a main flow power configuration, and then, new technical difficulties are brought about, namely that the space in a vehicle cabin is narrower, the ambient temperature is too high, and the heat management in the engine cabin becomes a concern.

Due to the increased temperature in the cabin, the engine itself requires a more demanding cooling system. The coolant water inlet pipe which is a key component of the cooling system needs to overcome the requirement of long-term high-temperature resistance. How to make the coolant inlet pipe can satisfy higher system pressure and adapt to higher temperature environment becomes the problem that needs to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high temperature resistant engine inlet tube adopts PA612 with the contact of coolant liquid, can provide higher elongation at break for the engine coolant liquid inlet tube to make and have higher intensity and sealing performance.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

the utility model relates to a high temperature resistant engine cooling water pipe, include:

the pipe comprises a pipe body, wherein one end of the pipe body is connected with a joint; the joint is connected with an engine connecting interface;

the joint is a push lock type joint; the pipe body comprises a first layer of pipes in contact with a cooling liquid, and the first layer of pipes are made of PA 612.

On the basis of the above scheme and as a preferable scheme of the scheme: and a second layer of pipe is arranged outside the first layer of pipe and is made of PA 6T.

On the basis of the above scheme and as a preferable scheme of the scheme: and a third layer of pipe is arranged on the outer side of the second layer of pipe and is made of PA 612.

On the basis of the above scheme and as a preferable scheme of the scheme: and a fourth layer of pipe is arranged on the outer side of the third layer of pipe 13 and is made of PA 1012.

On the basis of the above scheme and as a preferable scheme of the scheme: and a fifth layer of pipe is arranged on the outer side of the fourth layer of pipe and is made of PA 1212.

The utility model has the advantages that: the utility model relates to a high temperature resistant engine cooling water pipe adopts PA612 to prepare the inlayer that contacts with the coolant liquid through extrusion molding forming process for this inlet tube can have high elongation at break, good sealing performance, high temperature resistant and low temperature performance. The adoption pushes away lock formula attach fitting and makes it have good anticreep performance.

Drawings

FIG. 1 is a schematic structural view of an engine coolant pipe according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a tubular body according to an embodiment;

fig. 3 is a schematic cross-sectional view of a pipe body according to a second embodiment;

fig. 4 is a schematic cross-sectional view of a pipe body according to a third embodiment.

The designations in the figures illustrate the following: 1-a pipe body; 2-a linker; 11-a first layer of tubes; 12-a second layer of tubes; 13-a third layer of tubes; 14-a fourth layer of tubes; 15-fifth layer of tubes.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example one

This embodiment will be described in detail with reference to fig. 1 and 2. The high temperature resistant engine cooling water pipe that this embodiment relates to includes: the pipe comprises a pipe body 1, wherein one end of the pipe body 1 is connected with a joint 2; the joint 2 is connected with an engine connecting interface. The joint 2 adopts a push lock type joint; the pipe body 1 comprises a first layer of pipes 11 in contact with a cooling liquid, and the first layer of pipes 11 are made of PA 612. The first layer of tubes 11 is made of PA612 by a high speed extrusion process with an extrusion speed of 60 m/min.

The joint of the push lock type structure, namely P2L, can make the pulling-out force after the cooling water pipe of the engine is connected with the interface of the engine, under the high temperature environment, can reach 505N through the test, higher than the standard pulling-out force requirement to 450N under the high temperature environment.

PA612, also known as polyamide 612 or nylon 612, has a polyhexamethylene dodecanedioyl diamine component. The PA612 has the characteristics of common PA, and also has the advantages of small relative density, lower water absorption and density, good dimensional stability, higher tensile strength and impact strength. Can provide good strength for the engine cooling water pipe.

Specifically, the thickness of the first tube layer 11 ranges from 0.5mm to 1.5mm, and is specifically 1mm in this embodiment.

Through tests, the elongation at break of the engine cooling water pipe related to the example one is 216%, and the bursting pressure at the temperature of 150 ℃ is 3 Ma. Meets the standard requirements of more than or equal to 200 percent of elongation at break and more than or equal to 2.5MPa of burst pressure.

Maintaining the pressure for 1min under the pressure of 2MPa, wherein the cooling water pipe of the engine has no deformation and no local expansion. And the product is stored for 480 hours under the condition of 150 ℃, and has no deformation and no cracking phenomenon. The product is stored for 24 hours at the temperature of minus 40 ℃, and has no deformation and cracking phenomenon. It can be seen that the engine cooling water pipe according to the present embodiment has good high temperature resistance and low temperature resistance.

Example two

This embodiment is described in detail with reference to fig. 3. The high temperature resistant engine cooling water pipe that this embodiment relates to includes: the pipe comprises a pipe body 1, wherein one end of the pipe body 1 is connected with a joint 2; the joint 2 is connected with an engine connecting interface. The joint 2 adopts a push lock type joint; the pipe body 1 comprises a first layer of pipes 11 in contact with a cooling liquid, and the first layer of pipes 11 are made of PA 612.

Further, a second layer of pipes 12 is arranged outside the first layer of pipes 11, and the second layer of pipes 12 is made of PA 6T.

Further, a third layer of tubes 13 is arranged outside the second layer of tubes 12, and the third layer of tubes 13 is made of PA 612.

The first layer tube 11, the second layer tube 12 and the third layer tube 13 are manufactured by an extrusion molding process.

In this embodiment, the thickness of the first tube layer 11 is 1mm, the thickness of the second tube layer 12 is 0.2mm, and the thickness of the third tube layer is 0.2 mm.

Through tests, the elongation at break of the engine cooling water pipe related to the second example is 205%, and the bursting pressure at the temperature of 150 ℃ is 2.8 Ma. The requirements of the standard on the elongation at break of more than or equal to 200 percent and the burst pressure of more than or equal to 2MPa are met.

Maintaining the pressure for 1min under the pressure of 2MPa, wherein the cooling water pipe of the engine has no deformation and no local expansion. And the product is stored for 480 hours under the condition of 150 ℃, and has no deformation and no cracking phenomenon. The product is stored for 24 hours at the temperature of minus 40 ℃, and has no deformation and cracking phenomenon. It can be seen that this embodiment

EXAMPLE III

This embodiment will be described in detail with reference to fig. 3. The present embodiment relates to a high temperature resistant engine cooling water pipe, which is different from the second embodiment in that: a fourth layer of tubes 14 is arranged outside the third layer of tubes 13, and the fourth layer of tubes 14 are made of PA 1012.

Further, a fifth layer tube 15 is arranged on the outer side of the fourth layer tube 14, and the fifth layer tube 15 is made of PA 1212.

The first layer tube 11, the second layer tube 12, the third layer tube 13, the fourth layer tube 14 and the fifth layer tube 15 are also prepared by adopting an extrusion molding process. In this embodiment, the thickness of the first layer tube 11 is 0.5mm, the thickness of the second layer tube 12 is 0.2mm, the thickness of the third layer tube 13 is 0.2mm, the thickness of the fourth layer tube 14 is 0.3mm, and the thickness of the fifth layer tube 15 is 0.2 mm.

Polyamides (polyamides, PA), also known as nylons, tend to be very important among five major engineering plastics (polycarbonates, polyamides, polyphenylene oxides, polyoxymethylene, polybutylene terephthalate). In a plurality of polyamide varieties such as PA6, PA66, PA46, PA11, PA12, PA1010, PA612, PA6T, PA9T and the like, PA66 and PA6 occupy the leading position of the market and are the key points of research. The nylon can be classified into short carbon chain nylon and long carbon chain nylon, and the long carbon chain nylon refers to nylon with more than 10 carbon atoms between two amide groups, such as PA1010, PA1012, PA1212 and the like. The long carbon chain nylon has unique physical and chemical properties, such as low water absorption, good dimensional stability, good toughness, excellent shock resistance and cold resistance, and the like. Therefore, the long carbon chain nylon selected in the embodiment can provide the engine cooling water pipe with the advantages of higher cold resistance, higher strength and the like.

Through tests, the elongation at break of the engine cooling water pipe related to the third example is 234%, and the bursting pressure at the temperature of 150 ℃ is 3.2 Ma. The requirements of the standard on the elongation at break of more than or equal to 200 percent and the burst pressure of more than or equal to 2MPa are met.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A high temperature resistant engine cooling water pipe, characterized by comprising:

one end of the pipe body (1) is connected with a joint (2); the joint (2) is connected with an engine connecting interface;

the joint (2) adopts a push lock type joint; the pipe body (1) comprises a first layer of pipes (11) in contact with a cooling liquid, and the first layer of pipes (11) are made of PA 612.

2. The high-temperature-resistant engine cooling water pipe according to claim 1, characterized in that a second layer of pipes (12) is arranged outside the first layer of pipes (11), and the second layer of pipes (12) is made of PA 6T.

3. The high-temperature-resistant engine cooling water pipe according to claim 2, characterized in that a third layer of pipes (13) is arranged outside the second layer of pipes (12), and the third layer of pipes (13) is made of PA 612.

4. The high-temperature-resistant engine cooling water pipe according to claim 3, characterized in that a fourth layer of pipes (14) is arranged outside the third layer of pipes (13), and the fourth layer of pipes (14) is made of PA 1012.

5. The high-temperature-resistant engine cooling water pipe according to claim 4, characterized in that a fifth layer of pipes (15) is arranged on the outer side of the fourth layer of pipes (14), and the fifth layer of pipes (15) is made of PA 1212.