A trigger structure for ignition delay time testing

Abstract

The utility model discloses a kind of trigger structures for ignition delay time test in propellant testing technical field, including firing structure and primer structure, the first electrode is led out outward by above-mentioned firing structure, the second electrode is led out outward by above-mentioned primer structure;The firing point position of above-mentioned firing structure and above-mentioned primer structure is respectively provided with corresponding first conducting part and second conducting part, above-mentioned first conducting part is electrically connected in above-mentioned first electrode, above-mentioned second conducting part is electrically connected in above-mentioned second electrode;The mode that original utilizes wedge-shaped slider on firing pin body to push on latch body transmission slider movement realizes electrode conduction is changed into the mode that firing structure and primer structure realize first electrode and second electrode conduction in direct contact process, so that realize stable trigger in testing process, entire structure has the characteristics such as simple structure, no intermediate transmission, system reliability is higher.

Description

Technical Field

[0001] This utility model relates to the field of propellant testing technology, and in particular to a trigger structure for testing ignition delay time. Background Technology

[0002] When conducting internal ballistic performance tests on propellants, the ignition delay time (the time from the firing pin igniting the primer to the chamber pressure reaching 400 bar) needs to be tested. The existing method for testing ignition delay time is as follows: after the firing pin is released, it moves forward, and a wedge-shaped block on the firing pin pushes a transmission slider mounted on the breechblock. Simultaneously, the firing pin contacts the primer, and the electrodes on the transmission slider and the breechblock make contact. The instant the two electrodes connect is considered the ignition moment of the primer and also the start signal for the ignition delay time test. The ignition delay time is calculated based on the time it takes for the chamber pressure to reach 400 bar. The problems with this testing method are as follows: it adopts a purely mechanical transmission method, which is relatively complex in structure. The machining dimensions of each part are related to whether the electrode conduction is synchronized with the firing pin contacting the primer. With the increase of use, the length of the firing pin, the wedge block on the firing pin, the transmission slider, etc. will wear down, resulting in the electrode conduction being out of sync with the firing pin contacting the primer. During use, the oil fumes produced after the propellant burns will adhere to the firing pin wedge block, the transmission slider, the electrode contact end, etc., which will also cause the electrode conduction to be out of sync with the firing pin contacting the primer, or even the electrode to fail to conduct. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to improve the problem of the instrument failing to start due to asynchronous mechanical transmission caused by wear and poor contact.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A trigger structure for ignition delay time testing includes a firing structure and a primer structure. The firing structure extends outward to a first electrode, and the primer structure extends outward to a second electrode. The firing points of the firing structure and the primer structure are respectively provided with corresponding first conductive parts and second conductive parts. The first conductive parts are electrically connected to the first electrode, and the second conductive parts are electrically connected to the second electrode.

[0005] Furthermore, the firing structure includes a firing housing, a firing pin is provided at one end of the firing housing near the primer structure, and the first conductive part is provided at the end of the firing pin near the primer structure; it also includes an insulated wire, the wire is electrically connected to the first conductive part and extends out of the firing housing in a direction away from the primer structure, and the end of the wire away from the first conductive part is electrically connected to the first electrode.

[0006] Furthermore, both the firing housing and the outer wall of the firing pin are provided with an insulating coating, and the first conductive part is the part of the firing pin end that is not provided with the insulating coating.

[0007] Furthermore, the aforementioned primer structure includes a firing primer, a limiting cover is provided between the firing primer and the firing pin, the limiting cover is provided with a guide hole for the firing pin to pass through, the firing pin passes through the guide hole and contacts the firing primer; the firing primer is electrically connected to a second electrode.

[0008] Furthermore, the outer wall of the aforementioned limiting cover is completely covered with an insulating coating.

[0009] Furthermore, the aforementioned firing primer is connected to a conductive insert, and the conductive insert extends outward to the aforementioned second electrode.

[0010] Furthermore, the aforementioned housing includes a firing pin barrel, with a firing pin cover at the end of the firing pin barrel away from the firing pin, the firing pin being connected to the end of the firing pin barrel near the primer structure, and a spring structure passing through the firing pin barrel; one end of the aforementioned wire passes through the firing pin and is electrically connected to the first conductive part, while the other end extends outward along the firing pin barrel from the firing pin cover.

[0011] The beneficial effects of this utility model are: The original method of using a wedge-shaped slider on the firing pin to drive a transmission slider on the latch to achieve electrode conduction has been changed to a method in which the first and second electrodes are connected through direct contact between the firing structure and the primer structure. This results in stable triggering during the test process, and the entire structure features simple structure, no intermediate transmission, and high system reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the firing pin structure of this utility model; The markings in the diagram are as follows: 1-firing housing, 2-firing pin, 3-primer structure, 4-limiting cover, 5-conductive insert, 6-second electrode, 7-wire, 8-first electrode, 9-launching tube, 11-firing pin tube, 12-firing pin cover, 13-spring structure, 21-first conductive part, 31-second conductive part. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figures 1-3As shown in the embodiment of this application, a trigger structure for ignition delay time testing is proposed, including a firing structure and a primer structure 3. The firing structure extends outward to a first electrode 8, and the primer structure 3 extends outward to a second electrode 6. The firing point positions of the firing structure and the primer structure 3 are respectively provided with corresponding first conductive part 21 and second conductive part 31. The first conductive part 21 is electrically connected to the first electrode 8, and the second conductive part 31 is electrically connected to the second electrode 6.

[0015] First, it should be stated that when the firing structure is triggered and released, it contacts the primer structure 3 by impact, which makes the first conductive part 21 and the second conductive part 31 instantly connected, so that the circuit of the first electrode 8 and the second electrode 6 connected to the corresponding test system is connected, and the test can be carried out stably. The entire structure does not require the assistance of the transmission structure, and has high reliability and stability.

[0016] Specifically, the firing structure includes a firing housing 1, with a firing pin 2 located at one end of the firing housing 1 near the primer structure 3. A first conductive part 21 is located at the end of the firing pin 2 near the primer structure 3. It also includes an insulated wire 7, which is electrically connected to the first conductive part 21 and extends out of the firing housing 1 in a direction away from the primer structure 3. The end of the wire 7 away from the first conductive part 21 is electrically connected to the first electrode 8. The wire 7 ensures that the test circuit extends along the inside of the firing housing 1, that there are no other electrode leads in the entire test device, that the wire 7 has minimal conductivity with the first conductive part 21, and that it is completely insulated from other parts of the firing housing 1. Furthermore, the primer structure 3 is connected to the tail of the firing tube 9, achieving a stable firing process.

[0017] In addition, both the outer walls of the firing housing 1 and the firing pin 2 are provided with an insulating coating. The first conductive part 21 is the part at the end of the firing pin 2 where the insulating coating is not provided. The insulating coating can prevent the first electrode 8 and the firing housing 1 from conducting electricity, thereby improving the accuracy of the test.

[0018] Specifically, the aforementioned housing includes a firing pin 2 cylinder, with a firing pin 2 cover at the end of the firing pin 2 cylinder away from the firing pin 2. The firing pin 2 is connected to the end of the firing pin 2 cylinder near the primer structure 3. A spring structure 13 is installed inside the firing pin 2 cylinder. One end of the aforementioned wire 7 is inserted into the firing pin 2 and electrically connected to the first conductive part 21, while the other end extends outward from the firing pin 2 cover along the firing pin 2 cylinder.

[0019] The aforementioned primer structure 3 includes a firing primer. A limiting cover 4 is provided between the firing primer and the firing pin 2. The limiting cover 4 has a guide hole for the firing pin 2 to pass through, and the firing pin 2 contacts the firing primer through the guide hole. The firing primer is electrically connected to a second electrode 6. By providing the limiting cover 4, it is ensured that the firing pin 2 can stably fire the firing primer, and its position is limited, thus improving the reliability of the testing process. Moreover, the outer wall of the limiting cover 4 is completely covered with an insulating coating, further improving the testing stability.

[0020] In order to ensure a stable electrical connection between the firing primer and the second electrode 6, the firing primer is connected to a conductive insert 5, which leads outward to the second electrode 6, thus ensuring the stability of the circuit conduction.

[0021] In summary, this utility model proposes a trigger structure for ignition delay time testing. The first electrode 8 and the second electrode 6 are made conductive during the direct contact between the ignition structure and the primer structure 3, which enables stable triggering during the test process. The entire structure has the characteristics of simple structure, no intermediate transmission, and high system reliability. Moreover, by setting an insulating coating, the stability of the test circuit is ensured, further improving the stability of the test process.

Claims

1. A trigger structure for testing ignition delay time, characterized in that, It includes a firing structure and a primer structure (3). The firing structure leads out a first electrode (8), and the primer structure (3) leads out a second electrode (6). The firing point of the firing structure and the primer structure (3) are respectively provided with a first conductive part (21) and a second conductive part (31). The first conductive part (21) is electrically connected to the first electrode (8), and the second conductive part (31) is electrically connected to the second electrode (6).

2. The trigger structure for ignition delay time testing according to claim 1, characterized in that, The firing structure includes a firing housing (1), a firing pin (2) is provided at one end of the firing housing (1) near the primer structure (3), and a first conductive part (21) is provided at the end of the firing pin (2) near the primer structure (3); it also includes an insulated wire (7), the wire (7) is electrically connected to the first conductive part (21) and extends out of the firing housing (1) in a direction away from the primer structure (3), and the end of the wire (7) away from the first conductive part (21) is electrically connected to the first electrode (8).

3. The trigger structure for ignition delay time testing according to claim 2, characterized in that, Both the firing housing (1) and the firing pin (2) are provided with an insulating coating on their outer walls. The first conductive part (21) is the part of the firing pin (2) where the insulating coating is not provided.

4. The trigger structure for ignition delay time testing according to claim 3, characterized in that, The primer structure (3) includes a firing primer, and a limiting cover (4) is provided between the firing primer and the firing pin (2). The limiting cover (4) is provided with a guide hole for the firing pin (2) to pass through, and the firing pin (2) passes through the guide hole to contact the firing primer; the firing primer is electrically connected to a second electrode (6).

5. The trigger structure for ignition delay time testing according to claim 4, characterized in that, The outer wall of the limiting cover (4) is completely covered with an insulating coating.

6. The trigger structure for ignition delay time testing according to claim 4, characterized in that, The firing primer is connected to a conductive insert (5), and the conductive insert (5) leads outward to the second electrode (6).

7. The trigger structure for ignition delay time testing according to claim 2, characterized in that, The housing includes a firing pin (2) cylinder, and a firing pin (2) cover is provided at one end of the firing pin (2) cylinder away from the firing pin (2). The firing pin (2) is connected to one end of the firing pin (2) cylinder near the primer structure (3). A spring structure (13) is provided inside the firing pin (2) cylinder. One end of the wire (7) is inserted into the firing pin (2) and electrically connected to the first conductive part (21), and the other end extends outward from the firing pin (2) cover along the firing pin (2) cylinder.

Images