A kind of automobile heat shield production is with corrosion resistance testing device

Abstract

The utility model discloses an automobile heat shield production is with corrosion -resisting testing arrangement, relates to heat shield test technical field, including test box, a side fixed connection of test box has a plurality of for simulating stone impact use's injection pipe, a side of test box is provided with the sealing assembly for sealing injection pipe use, the sealing assembly includes with the rectangular block of test box fixed connection, the top fixed mounting of rectangular block has electric push rod, the telescopic end fixed connection of electric push rod has roof, and one end of roof is provided with the rectangular hole, the inner slide of rectangular hole is connected with the sliding block, the bottom fixed connection of sliding block has sealing block, the utility model discloses a dynamic sealing to injection pipe through electric push rod drive sealing assembly, and the closed test space is formed to sealing structure in combination box, and the corrosion gas leakage amount is accurately controlled, and the penetration process of corrosion medium through the impact breakage in actual working condition is restored, reaches the effect of improving test accuracy.

Description

Technical Field

[0001] This utility model relates to the field of heat shield testing technology, and in particular to a corrosion resistance testing device for automotive heat shield production. Background Technology

[0002] When a car is driving on the road, the bottom of the heat shield is constantly subjected to the dual impact of gravel and corrosive media. This combined damage mechanism has become the main cause of protection failure.

[0003] High-speed flying debris not only causes coating peeling and exposes the metal substrate, but also forms microscopic defects on the substrate surface. These defects, as preferential anodic areas for electrochemical corrosion, interact with the corrosive medium, making the damaged area an active region of micron-level corrosion cells. In addition, stress concentration at the crack tip easily induces stress corrosion cracking. Moreover, most corrosion perforations of heat shields highly correspond to the impact damage location. However, traditional single testing methods cannot simulate this complex scenario, especially lacking simulation and impact of the corrosive medium penetration path under gas leakage conditions. As a result, after the coating is damaged, external corrosive gases can seep into the substrate through the damaged area. If the test device is not sufficiently sealed, the true corrosion rate cannot be reproduced. Therefore, it is necessary to conduct impact and corrosion synergistic testing, combined with a high-precision sealing system to control the gas leakage, in order to accurately capture the failure mechanism of the material under actual working conditions and provide effective support for the erosion-resistant design of heat shields.

[0004] Therefore, it is necessary to invent a corrosion resistance testing device for the production of automotive heat shields to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a corrosion resistance testing device for the production of automotive heat shields, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion resistance testing device for automotive heat shield production, comprising a test chamber, wherein multiple spray pipes for simulating stone impact are fixedly connected to one side of the test chamber, and a sealing assembly for sealing the spray pipes is provided on one side of the test chamber. The sealing assembly includes a rectangular block fixedly connected to the test chamber, an electric push rod fixedly mounted on the top of the rectangular block, a top plate fixedly connected to the telescopic end of the electric push rod, a rectangular hole opened at one end of the top plate, a slider slidably connected inside the rectangular hole, and a sealing block fixedly connected to the bottom of the slider. A first sealing gasket is fixedly sleeved on one side of the sealing block and slidably connected to the end of the injection pipe and the inner surface of the test chamber. A limiting frame is fixedly connected to the inner surface of the test chamber. A fixing plate is fixedly connected to the top center of the sealing block. A crossbar is fixedly connected to one side of the fixing plate. A first right-angle plate is movably passed through the crossbar. A limiting ring is fixedly passed through the outer peripheral surface of one end of the crossbar. A first compression spring is sleeved on the outer peripheral surface of the crossbar, with its two ends respectively abutting against the first right-angle plate and the limiting ring. A second right-angle plate is slidably connected to one end of the first right-angle plate. The second right-angle plate is slidably connected to the crossbar.

[0007] Preferably, a square material inlet is formed on the outer circumferential surface of one end of the spray pipe, and a first valve is fixedly installed at one end of the spray pipe. Support plates are symmetrically fixedly connected to one side of the test box on both sides of the spray pipe. One of the support plates is threadedly connected to a screw rod. The bottom end of the screw rod is rotatably connected to an assembly block that inserts into the square material inlet. The top of the assembly block is provided with arc-shaped grooves at equal intervals corresponding to the square material inlet. A vertical rod is fixedly connected to the other end of the assembly block, and the vertical rod movably passes through the other support plate.

[0008] Preferably, the test chamber has first vertical plates symmetrically fixedly connected to both sides near the sealing component inside, and a first clamping block is fixedly connected to one end of each of the two first vertical plates. Baffles are fixedly installed at the top and bottom of each of the first vertical plates.

[0009] Preferably, the interior of the test chamber is symmetrically and fixedly connected to the sealing assembly with limiting posts. One end of each of the two limiting posts movably passes through a limiting plate. A second compression spring is sleeved on the outer circumferential surface of each of the two limiting posts. A second vertical plate is fixedly connected to both ends of each of the two limiting plates. A second clamping block is fixedly connected to one end of each of the two second vertical plates. A heat insulation cover cutter is clamped and fixed between the first clamping block and the second clamping block.

[0010] Preferably, a second valve communicating with the internal space of the test chamber is fixedly installed on the side of the test chamber near the limiting post.

[0011] Preferably, a filter box communicating with the internal cavity of the test chamber is fixedly installed on one side of the test chamber, and a third valve communicating with the internal cavity of the filter box is fixedly installed on one side of the filter box.

[0012] Preferably, a cover plate is hinged to the upper side of the test box, a second sealing gasket for improving the sealing effect is fixedly installed on the top of the test box, and support legs are symmetrically fixedly connected to the lower sides of the test box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The sealing assembly driven by the electric push rod dynamically seals the injection pipe, forming a closed test space in combination with the box sealing structure. This precisely controls the amount of corrosive gas leakage, reproducing the process of corrosive media penetrating through the impact damage point in actual working conditions. This improves the corrosion rate deviation caused by insufficient sealing of the added injection pipe, and enhances the consistency between the erosion resistance performance evaluation results and the failure mode of the actual vehicle, thereby improving the accuracy of the test.

[0014] 2. By connecting an air pump to the injection pipe, stones are ejected at high speed to accurately simulate the impact damage of road debris on the heat shield coating. At the same time, a corrosive medium is introduced through a gas injection system to make the impact damage site of the heat shield exhibit an accelerated corrosion phenomenon similar to that of a real vehicle, thereby simulating a more realistic test environment and improving the test results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a top view of the overall structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the injection pipe and the mounting block of this utility model.

[0018] Figure 4 This is a schematic diagram of the sealing assembly of this utility model.

[0019] In the diagram: 1. Test chamber; 101. Second sealing gasket; 102. Support leg; 2. Injection pipe; 201. Square material inlet; 3. First valve; 4. Support plate; 5. Screw; 6. Mounting block; 601. Arc groove; 7. Vertical rod; 8. Sealing assembly; 801. Rectangular block; 802. Electric push rod; 803. Top plate; 804. Rectangular hole; 805. Slider; 806. Sealing block; 807. First sealing gasket; 808. Limiting frame; 809. 810. Fixed plate; 811. Crossbar; 812. Limiting ring; 813. First compression spring; 814. First right-angle plate; 815. Second right-angle plate; 816. First vertical plate; 817. First clamping block; 818. Baffle; 819. Limiting post; 82. Second compression spring; 83. Limiting plate; 84. Second vertical plate; 85. Second clamping block; 86. Second valve; 87. Filter box; 88. Third valve; 89. Cover plate; 80. Heat insulation cover cut piece. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figures 1-4The diagram shows a corrosion resistance testing device for automotive heat shield production, comprising a test chamber 1. Multiple spray pipes 2 for simulating stone impact are fixedly connected to one side of the test chamber 1. A sealing assembly 8 for sealing the spray pipes 2 is provided on one side of the test chamber 1. The sealing assembly 8 includes a rectangular block 801 fixedly connected to the test chamber 1. An electric push rod 802 is fixedly mounted on the top of the rectangular block 801. A top plate 803 is fixedly connected to the telescopic end of the electric push rod 802. A rectangular hole 804 is formed at one end of the top plate 803. A slider 805 is slidably connected inside the rectangular hole 804. A sealing block 806 is fixedly connected to the bottom of the slider 805. One side of the sealing block 806 is fixedly sleeved with the end of the spray pipe 2. The test chamber 1 is slidably connected to a first sealing gasket 807, a sealing block 806 is fitted with a limiting frame 808 fixedly connected to the inner side of the test chamber 1, a fixing plate 809 is fixedly connected to the top middle of the sealing block 806, a crossbar 810 is fixedly connected to one side of the fixing plate 809, a first right angle plate 813 is movably passed through the crossbar 810, a limiting ring 811 is fixedly passed through the outer peripheral surface of one end of the crossbar 810, a first compression spring 812 is fitted on the outer peripheral surface of the crossbar 810 for abutting against the first right angle plate 813 and the limiting ring 811 at both ends, a second right angle plate 814 is slidably connected to one end of the first right angle plate 813, and the second right angle plate 814 is slidably connected to the crossbar 810.

[0022] The test chamber 1 serves as the main load-bearing structure, with multiple spray pipes 2 fixedly connected to one side. By connecting an external air pump, stones can be sprayed to simulate road impact. The sealing assembly 8 is used for sealing control of the spray pipes 2. The electric push rod 802 drives the top plate 803 to move the slider 805 and the sealing block 806 up and down. The first sealing gasket 807 cooperates with the limiting frame 808 to seal the end of the spray pipe 2. The crossbar 810, the first compression spring 812, and the right-angle plate structure can provide lateral action during sealing, so that the sealing block 806, the first sealing gasket 807, and the inner surface of the test chamber 1 generate an interaction force, thereby improving the sealing effect.

[0023] A square material inlet 201 is provided on the outer circumferential surface of one end of the injection pipe 2. A first valve 3 is fixedly installed at one end of the injection pipe 2. Support plates 4 are symmetrically fixedly connected to one side of the test chamber 1 on both sides of the injection pipe 2. One support plate 4 is threadedly connected to a screw 5. The bottom end of the screw 5 is rotatably connected to an installation block 6 that inserts into the square material inlet 201. The top of the installation block 6 is provided with an arc-shaped groove 601 at equal intervals corresponding to the square material inlet 201. A vertical rod 7 is fixedly connected to the other end of the installation block 6. The vertical rod 7 movably passes through the other support plate 4. A first vertical plate 9 is symmetrically fixedly connected to both sides of the test chamber 1 near the sealing assembly 8. Two first vertical plates 9 are fixedly connected to one end of a first clamping block 10. Baffles 11 are fixedly installed at the top and bottom of the first vertical plates 9. Limiting posts 12 are symmetrically fixedly connected to the inside of the test chamber 1 opposite to the sealing assembly 8. One end of the two limiting posts 12 moves through the limiting plate 14. A second compression spring 13 is sleeved on the outer circumferential surface of the two limiting posts 12. Two second vertical plates 15 are fixedly connected to both ends of the two limiting plates 14. A second clamping block 16 is fixedly connected to one end of the two second vertical plates 15. A heat insulation cover cutter 21 is clamped and fixed between the first clamping block 10 and the second clamping block 16.

[0024] A square material inlet 201 is opened at the end of the spray pipe 2. Together with the support plate 4, screw 5 and mounting block 6, they form a feeding structure. Rotating the screw 5 can align the arc groove 601 on the mounting block 6 with the square material inlet 201, which is convenient for adding stones. The vertical rod 7 ensures that the mounting block 6 moves stably. The test box 1 is equipped with a first vertical plate 9, a first clamping block 10 and a baffle 11 to form a fixed end. On the other side, a limit post 12, a second compression spring 13, a limit plate 14, a second vertical plate 15 and a second clamping block 16 form an elastic clamping end, which together fix the heat insulation cover cut piece 21 to ensure the stability of the sample during the test.

[0025] A second valve 17, communicating with the internal space of the test chamber 1, is fixedly installed on one side of the test chamber 1 near the limiting post 12. A filter box 18, communicating with the internal cavity of the test chamber 1, is fixedly installed on one side of the test chamber 1. A third valve 19, communicating with the internal cavity of the filter box 18, is fixedly installed on one side of the test chamber 1. A cover plate 20 is hinged to the upper side of one side of the test chamber 1. A second sealing gasket 101, used to improve the sealing effect, is fixedly installed on the top of the test chamber 1. Support legs 102 are symmetrically fixedly connected to the lower sides of the test chamber 1. The third valve 19 controls the gas discharge of the filter box 18 for the treatment of exhaust gas after testing. The cover plate 20 and the second sealing gasket 101 cooperate to ensure the sealing of the chamber. The support legs 102 provide overall support.

[0026] The working principle of this utility model is as follows: Multiple spray pipes 2 are arranged on one side of the test chamber 1. Each spray pipe 2 is filled with impact media such as quartz sand through a square material inlet 201, and the opening and closing are controlled by the first valve 3. By rotating the screw 5, the arc groove 601 on the loading block 6 can be aligned with the square material inlet 201 to facilitate the addition of stones. The vertical rod 7 ensures the stable movement of the loading block 6. By connecting an external air pump to the first valve 3, the spraying of stones can be controlled to simulate road impact. The electric push rod 802 drives the top plate 803 to move the slider 805 and the sealing block 806 up and down, so that the first sealing gasket 807 and the limiting frame 808 can cooperate to achieve the two states of sealing and opening at the end of the spray pipe 2. The horizontal rod 810 and the first compression The spring 812 and the right-angle plate structure provide lateral action during sealing, causing the sealing block 806 to interact with the first sealing gasket 807 and the inner side of the test chamber 1, thus improving the sealing effect. The first clamping block 10 is supported by the first vertical plate 9 to form a fixed end. The second compression spring 13 is sleeved on the right limit post 12, driving the second clamping block 16 connected to the limit plate 14 and the second vertical plate 15 to form an elastic moving end. The baffle 11 prevents the medium from splashing. The test chamber 1 is injected with high-temperature corrosive gas through the second valve 17. The third valve 19 connects to the filter box 18 to realize the exhaust gas treatment and circulation. The top hinged cover plate 20, together with the second sealing gasket 101, forms a sealed space. The support leg 102 ensures the stability of the equipment.

[0027] It should be noted that the filter box 18 has built-in activated carbon and an acid-base neutralization layer to ensure that the emitted gas meets environmental protection standards; the electric push rod 802 can be connected to an external power source, and the outer surface of the circuit is provided with an anti-corrosion coating. After passing through the test box 1, the circuit is connected to an external control terminal.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrosion resistance testing device for automotive heat shield production, comprising a test chamber (1), characterized in that: A plurality of spray pipes (2) for simulating stone impact are fixedly connected to one side of the test box (1). A sealing assembly (8) for sealing the spray pipes (2) is provided on one side of the test box (1). The sealing assembly (8) includes a rectangular block (801) fixedly connected to the test box (1). An electric push rod (802) is fixedly installed on the top of the rectangular block (801). A top plate (803) is fixedly connected to the telescopic end of the electric push rod (802). A rectangular hole (804) is opened at one end of the top plate (803). A slider (805) is slidably connected inside the rectangular hole (804). A sealing block (806) is fixedly connected to the bottom of the slider (805). A first sealing gasket (807) is fixedly sleeved on one side of the sealing block (806) and slidably connected to the end of the spray pipe (2) and the inner surface of the test box (1). A limiting frame (808) is sleeved on the sealing block (806) and fixedly connected to the inner side of the test box (1). A fixing plate (809) is fixedly connected to the top center of the sealing block (806). A crossbar (810) is fixedly connected to one side of the fixing plate (809). A first right-angle plate (813) is movably passed through the crossbar (810). A limit ring (811) is fixedly passed through the outer peripheral surface of one end of the crossbar (810). A first compression spring (812) is sleeved on the outer peripheral surface of the crossbar (810) for its two ends to abut against the first right-angle plate (813) and the limit ring (811) respectively. A second right-angle plate (814) is slidably connected to one end of the first right-angle plate (813). The second right-angle plate (814) is slidably connected to the crossbar (810).

2. The corrosion resistance testing device for automotive heat shield production according to claim 1, characterized in that: A square material inlet (201) is provided on the outer circumferential surface of one end of the spray pipe (2). A first valve (3) is fixedly installed on one end of the spray pipe (2). A support plate (4) is symmetrically fixedly connected to one side of the test box (1) on both sides of the spray pipe (2). One of the support plates (4) is threadedly connected to a screw (5). The bottom end of the screw (5) is rotatably connected to an mounting block (6) that is inserted into the square material inlet (201). The top of the mounting block (6) is provided with an arc groove (601) at equal intervals corresponding to the square material inlet (201). The other end of the mounting block (6) is fixedly connected to a vertical rod (7). The vertical rod (7) is movably connected to the other support plate (4).

3. The corrosion resistance testing device for automotive heat shield production according to claim 1, characterized in that: The test chamber (1) has first vertical plates (9) symmetrically fixedly connected to the two sides near the sealing assembly (8) inside. One end of each of the two first vertical plates (9) is fixedly connected to a first clamping block (10). Baffles (11) are fixedly installed on the top and bottom of the first vertical plates (9).

4. The corrosion resistance testing device for producing an automobile heat shield according to claim 3, characterized in that: The test chamber (1) is symmetrically fixedly connected to the sealing assembly (8) with limiting posts (12) inside. One end of the two limiting posts (12) moves through the limiting plate (14). The outer peripheral surfaces of the two limiting posts (12) are fitted with second compression springs (13). The two ends of the two limiting plates (14) are fixedly connected with second vertical plates (15). One end of the two second vertical plates (15) is fixedly connected with a second clamping block (16). The heat insulation cover cutter (21) is clamped and fixed between the first clamping block (10) and the second clamping block (16).

5. The corrosion resistance testing device for producing an automobile heat shield according to claim 1, characterized in that: A second valve (17) that communicates with the internal space of the test box (1) is fixedly installed on the side of the test box (1) near the limiting post (12).

6. The corrosion resistance testing device for producing an automobile heat shield according to claim 1, characterized in that: A filter box (18) communicating with the internal cavity of the test box (1) is fixedly installed on one side of the test box (1), and a third valve (19) communicating with the internal cavity of the filter box (18) is fixedly installed on one side of the filter box (18).

7. The corrosion resistance testing device for producing an automobile heat shield according to claim 1, characterized in that: A cover plate (20) is hinged to the top of one side of the test box (1), a second sealing gasket (101) for improving the sealing effect is fixedly installed on the top of the test box (1), and support legs (102) are symmetrically fixedly connected to the bottom of both sides of the test box (1).

Images