Gas generator internal pressure test development device

Abstract

The utility model discloses a gas generator internal pressure test development device, which comprises an end cover, a long screw and an adapter, the end cover comprises an end cover tail pipe and an end cover head, the right side surface of the end cover head is provided with an inner cavity, the diameter of the inner cavity is the same as the inner diameter of the end cover tail pipe, and the inner cavity and the end cover tail pipe are concentric circles; the right end face of the end cover head is fixedly connected with the left end face of the end cover tail pipe, the inner cavity is communicated with the interior of the end cover tail pipe, a first installation hole is formed in the outer side face of the end cover tail pipe and communicated with the interior of the end cover tail pipe, and the lower end of a long screw is arranged in the first installation hole and is in threaded connection with the end cover tail pipe through the first installation hole. The upper end of the long screw penetrates through the lower end face of the adapter and then is arranged in the adapter, the long screw is in threaded connection with the adapter, a through hole is formed in the long screw, and the interior of the adapter is communicated with the interior of the end cover tail pipe through the through hole. The beneficial effects of the utility model are that the test data are more stable, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to internal pressure testing devices, in particular to a gas generator internal pressure testing and development device. Background Art

[0002] The existing methods for testing the internal pressure of the gunpowder end cavity of the generator are inconsistent, resulting in unstable test data and low reliability, and unable to ensure that the safety factor of the airbag gas generator meets industry standards. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of unstable test data and low reliability in the prior art and provides a gas generator internal pressure test development device with relatively stable test data and increased reliability.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The cam is threadably connected to the side of the adapter sleeve, and the cam sleeve has an inwardly oriented surface, the inwardly oriented surface of the adapter sleeve having a central portion for retaining the engagement of the cam sleeve and the central portion for retaining the engagement of the cam sleeve.

[0006] First, a mounting hole is drilled in the end cap tail tube. The end cap head and tail tube are then securely welded together to form an end cap suitable for internal pressure testing. The welded cavity must not deviate from the concentricity of the end cap tail tube. A long screw is then screwed into the mounting hole, ensuring a tight seal and no leakage under high pressure. An adapter is then screwed onto the upper end of the long screw. The welded end cap is then pressurized by inflating the end cap with high pressure through the adapter and the through-hole. The completed component is then connected to a test harness and a sensor for an internal pressure detonation test. By comparing the internal pressure within the cavity with the end cap shell strength, this provides crucial data for evaluating the safety factor of the gas generator. Under high pressure (up to 20,000 PSI within the end cap cavity), the end cap mounting hole remains leak-free and the weld joint remains continuous. This facilitates production and ensures strength. Using a single test tool reduces errors and facilitates connection, resulting in more stable test data and increased reliability.

[0007] Preferably, a hexagonal groove is provided on the upper end surface of the long screw, and the hexagonal groove is co-centered with the through hole, so that the hexagonal groove facilitates the screwing of the long screw.

[0008] Preferably, the horizontal angle between the long screw and the end cap tail pipe is 39.5 degrees to 40.5 degrees. This angle can quickly and accurately fill the inner cavity with gas.

[0009] Preferably, the cross-section of the left end of the end cap is arc-shaped, and the left end surface of the end cap is provided with a top groove, which is aligned with the inner cavity. The top groove facilitates the arc-shaped end cap to be supported and fixed during operation.

[0010] Preferably, the adapter has a mounting groove on its upper end surface, and a second mounting hole on its inner bottom surface. The upper end of the long screw passes through the adapter's lower end surface and is positioned within the second mounting hole. The long screw is threadedly connected to the adapter through the second mounting hole, and the mounting groove communicates with the interior of the end cap tail pipe via a through-hole. The mounting groove facilitates the connection of components, while the second mounting hole is designed to tightly connect the long screw.

[0011] Preferably, a slot is provided on the right end surface of the end cap tail pipe, the slot is concentric with the inner cavity, and the lower end of the through hole is located on the left side of the slot. The slot is convenient for placing test parts.

[0012] The beneficial effects of the utility model are: the test data is relatively stable and the reliability is increased; the hexagonal groove is convenient for turning the long screw; the angle of 39.5 degrees to 40.5 degrees can quickly and accurately fill the inner cavity with gas; the top groove is convenient for the arc-shaped end cover head to be supported and fixed during work; the installation groove is convenient for connecting parts, and the second installation hole is for tightly connecting the long screw; the card slot is convenient for placing test parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the main view of the present utility model;

[0015] Figure 3 yes Figure 2 An enlarged view of detail A;

[0016] Figure 4 yes Figure 2 Magnified view of detail B.

[0017] In the figure: 1. Long screw, 2. Adapter, 3. End cap tail pipe, 4. End cap head, 5. Inner cavity, 6. Mounting hole 1, 7. Through hole, 8. Hexagonal groove, 9. Top groove, 10. Mounting slot, 11. Mounting hole 2, 12. Clamping slot. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 and Figure 2 In the embodiment, a gas generator internal pressure test and development device is provided, which includes an end cover, a long screw 1 and an adapter 2. The end cover includes an end cover tail pipe 3 and an end cover head 4. An inner cavity 5 is provided on the right side surface of the end cover head 4. The diameter of the inner cavity 5 is the same as the inner diameter of the end cover tail pipe 3 and is concentric. The cross-sectional shape of the left end of the inner cavity 5 is arc-shaped. The right end surface of the end cover head 4 is fixedly connected to the left end surface of the end cover tail pipe 3. The inner cavity 5 is communicated with the interior of the end cover tail pipe 3. A mounting hole 6 is provided on the outer side surface of the end cover tail pipe 3. The mounting hole 6 is communicated with the interior of the end cover tail pipe 3. The lower end of the long screw 1 is placed in the mounting hole 6 and is threadedly connected to the end cover tail pipe 3 through the mounting hole 6. The upper end of the long screw 1 passes through the lower end surface of the adapter 2 and is placed in the adapter 2. The long screw 1 is threadedly connected to the adapter 2. A through hole 7 is provided in the long screw 1. The interior of the adapter 2 is communicated with the interior of the end cover tail pipe 3 through the through hole 7.

[0020] like Figure 2 and Figure 3 As shown, a hexagonal groove 8 is provided on the upper end surface of the long screw 1, and the hexagonal groove 8 and the through hole 7 are co-centered.

[0021] like Figure 2 and Figure 3 As shown, the horizontal angle between the long screw 1 and the end cover tail pipe 3 is 39.5 degrees to 40.5 degrees.

[0022] like Figure 1 、 Figure 2 and Figure 4 As shown, the cross-section of the left end of the end cover head 4 is arc-shaped, and a top groove 9 is provided on the left end surface of the end cover head 4. The top groove 9 is in the same straight line as the inner cavity 5.

[0023] like Figure 2 and Figure 3 As shown, a mounting groove 10 is provided on the upper end surface of the adapter 2, and a second mounting hole 11 is provided on the inner bottom surface of the mounting groove 10. The upper end of the long screw 1 passes through the lower end surface of the adapter 2 and is placed in the second mounting hole 11. The long screw 1 is threadedly connected to the adapter 2 through the second mounting hole 11, and the mounting groove 10 is connected to the interior of the end cover tail pipe 3 through the through hole 7.

[0024] like Figure 2 and Figure 3 As shown, a clamping groove 12 is provided on the right end surface of the end cover tail pipe 3 . The clamping groove 12 and the inner cavity 5 are concentric circles, and the lower end of the through hole 7 is located on the left side of the clamping groove 12 .

[0025] First, a mounting hole 6 is drilled in the end cap tail pipe 3. The end cap head 4 and the end cap tail pipe 3 are then securely welded together to form an end cap that meets internal pressure testing requirements. The welded inner cavity 5 must not have any concentricity deviation with the interior of the end cap tail pipe 3. Then, a long screw 1 is screwed into the mounting hole 6 through the hexagonal groove 8. A good seal is required, preventing air leakage under high pressure. Then, an adapter 2 is screwed onto the upper end of the long screw 1 through the mounting hole 2 11. The refueling equipment component is then connected to the mounting groove 10 on the adapter 2. The test piece is placed in the clamping groove 12 and sealed. A fixing tool is used to press against the top groove 9 to secure the curved end cap. High-pressure gas is then applied to the welded inner cavity 5 through the through hole 7. This pressurized production ensures that the curved inner cavity 5 withstands more uniform pressure and is therefore safer. The completed component is then connected to a test harness and subjected to an internal pressure detonation test. By comparing the internal pressure within the inner cavity 5 with the end cap shell strength, important data is provided for evaluating the safety factor of the gas generator. Under high pressure (the inner cavity of the end cover can reach 20,000 PSI), the six end cover mounting holes are leak-proof and the welding joints are continuous. This is convenient in production and ensures strength. The test tool is the same to reduce errors, achieving the purpose of more stable test data and increased reliability.

Claims

1. A gas generator internal pressure test development device, characterized in that: The invention comprises an end cover, a long screw (1) and an adapter (2), wherein the end cover comprises an end cover tail tube (3) and an end cover head (4), an inner cavity (5) is provided on the right side surface of the end cover head (4), the diameter of the inner cavity (5) is the same as the inner diameter of the end cover tail tube (3) and is concentric, the cross-section of the left end of the inner cavity (5) is arc-shaped, the right end surface of the end cover head (4) is fixedly connected to the left end surface of the end cover tail tube (3), the inner cavity (5) is communicated with the interior of the end cover tail tube (3), and the outer surface of the end cover tail tube (3) is provided with a mounting hole. Hole 1 (6), the mounting hole 1 (6) is communicated with the interior of the end cover tail tube (3), the lower end of the long screw (1) is placed in the mounting hole 1 (6) and is threadedly connected to the end cover tail tube (3) through the mounting hole 1 (6), the upper end of the long screw (1) passes through the lower end surface of the adapter (2) and is placed in the adapter (2), the long screw (1) is threadedly connected to the adapter (2), a through hole (7) is provided in the long screw (1), and the interior of the adapter (2) is communicated with the interior of the end cover tail tube (3) through the through hole (7).

2. A gas generator internal pressure test and development device according to claim 1, characterized in that: A hexagonal groove (8) is provided on the upper end surface of the long screw (1), and the hexagonal groove (8) and the through hole (7) are co-centered.

3. A gas generator internal pressure test and development device according to claim 1, characterized in that: The horizontal angle between the long screw (1) and the end cover tail pipe (3) is 39.5 degrees to 40.5 degrees.

4. A gas generator internal pressure test and development device according to claim 1, characterized in that: The cross-section of the left end of the end cap head (4) is arc-shaped, and the left end surface of the end cap head (4) is provided with a top groove (9), and the top groove (9) is in the same straight line as the inner cavity (5).

5. A gas generator internal pressure test and development device according to claim 1, characterized in that: The upper end surface of the adapter (2) is provided with a mounting groove (10), and the inner bottom surface of the mounting groove (10) is provided with a second mounting hole (11). The upper end of the long screw (1) passes through the lower end surface of the adapter (2) and is placed in the second mounting hole (11). The long screw (1) is threadedly connected to the adapter (2) through the second mounting hole (11). The mounting groove (10) is communicated with the interior of the end cover tail pipe (3) through the through hole (7).

6. A gas generator internal pressure test and development device according to claim 1, characterized in that: A clamping groove (12) is provided on the right end surface of the end cover tail pipe (3), the clamping groove (12) and the inner cavity (5) are concentric circles, and the lower end of the through hole (7) is located on the left side of the clamping groove (12).

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