阅读说明：本技术 一种电点火头的固定保护盖 (Fixed protective cover of electric ignition head ) 是由 杜伟强 罗思璇 吴飞春 俞鑫 李建 穆康兴 王昌茂 孙福合 徐志敬 马宏玲 于 2019-09-27 设计创作，主要内容包括：本发明提供了一种电点火头的固定保护盖,所述固定保护盖设置有容纳所述电点火头的内腔；所述固定保护盖的一端设置有内螺纹；所述固定保护盖的另一端设置有一圆形孔,所述电点火头的短接导线从所述圆形孔中穿出。本发明可以防止电点火头因发动机在运输或搬运过程中因颠簸振动或人为触碰而脱出,可以保护电点火头不受外界运输安装环境影响,提高了装置的整体安全性与可靠性。(The invention provides a fixed protective cover of an electric ignition head, which is provided with an inner cavity for accommodating the electric ignition head; one end of the fixed protective cover is provided with an internal thread; the other end of the fixed protective cover is provided with a circular hole, and a short circuit lead of the electric ignition head penetrates out of the circular hole. The invention can prevent the electric ignition head from coming off due to bumping vibration or artificial touch in the process of transporting or carrying the engine, can protect the electric ignition head from being influenced by external transportation and installation environment, and improves the overall safety and reliability of the device.)

1. A fixed protective cover for an electric igniter, comprising:

the fixed protective cover is provided with an inner cavity for accommodating the electric ignition head;

one end of the fixed protective cover is provided with an internal thread;

the other end of the fixed protective cover is provided with a circular hole, and a short circuit lead of the electric ignition head penetrates out of the circular hole.

2. The stationary protective cover of claim 1, wherein a depth of said cavity is the same as a height of said electric firing head.

3. The stationary protective cover of claim 1, wherein said electric firing head is cylindrical in shape, and said circular aperture has a diameter less than a diameter of said electric firing head.

4. The stationary protective cover of claim 1 wherein the internal threads mate with external threads provided on the detonation end of the diaphragm igniter.

5. The stationary protective cover of claim 4, wherein the length of the internal thread is greater than the length of the external thread.

6. The stationary protective cover of claim 4, wherein the stationary protective cover has a rotatable cylindrical rolling linear path.

7. The stationary protective cover of claim 6, wherein the cylindrical linear ridge is fixedly coupled to the internal thread to drive the internal thread into engagement with the external thread when the cylindrical linear ridge is rotated.

8. The stationary protective cover of claim 4 wherein an end of the baffle igniter remote from the electrical ignition head is connected to a transmitter.

Technical Field

The invention relates to the technical field of aerospace initiating explosive devices, in particular to a fixed protective cover of an electric ignition head.

Background

The solid rocket motor is used as a part of the separation system and is ignited by a baffle igniter at the tail end of a priming system of the separation system. However, the solid rocket engine needs to be subjected to a large number of independent performance verification tests before the combined test of the separation system, and in order to reduce the test cost, an independent ignition device is adopted instead of the whole initiating explosive device system to ignite the engine. In order to ensure the consistency of the test performance of the product, the independent ignition device is still a clapboard igniter of the initiating explosive system, and the detonation end of the clapboard igniter is connected with an electric ignition head matched with the size of the clapboard igniter, so that the original initiating explosive system detonating fuse is replaced.

The electric ignition head with the lead is embedded into the inner hole of the detonation end of the igniter of the partition plate, the electric ignition head is required to be installed in place after the engine is fixed on a test bed for preventing the ignition head from being separated due to jolting vibration or artificial touch in the transportation or carrying process of the engine, the process is complicated, and the integrity of an ignition device cannot be guaranteed.

Disclosure of Invention

The technical problem solved by the invention is as follows: the problem that in the prior art, the electric ignition head needs to be installed in place after the engine is fixed on a test bed, the process is complicated, and the integrity of the ignition device cannot be guaranteed is solved, and the fixed protective cover of the electric ignition head is provided.

The technical solution of the invention is as follows:

the embodiment of the invention provides a fixed protective cover of an electric ignition head, which comprises:

the fixed protective cover is provided with an inner cavity for accommodating the electric ignition head;

one end of the fixed protective cover is provided with an internal thread;

the other end of the fixed protective cover is provided with a circular hole, and a short circuit lead of the electric ignition head penetrates out of the circular hole.

Preferably, the depth of the inner cavity is the same as the height of the electric ignition head.

Preferably, the electric ignition head is cylindrical in shape, and the diameter of the circular hole is smaller than that of the electric ignition head.

Preferably, the internal thread matches an external thread provided at the detonation end of the diaphragm igniter.

Preferably, the length of the internal thread is greater than the length of the external thread.

Preferably, the fixed protective cover is provided with a rotatable cylindrical rolling straight line grain.

Preferably, the cylindrical rolling straight line is fixedly connected with the internal thread, so that when the cylindrical rolling straight line rotates, the internal thread is driven to be connected with the external thread.

Preferably, an end of the baffle igniter remote from the electrical ignition head is connected to a transmitter.

Compared with the prior art, the invention has the advantages that:

1) the electric ignition head of the ignition partition plate igniter can be fixedly arranged in the inner hole of the ignition end of the partition plate igniter, so that the electric ignition head is prevented from being separated due to bumping vibration or artificial touch in the transportation or carrying process of the engine;

2) the partition plate igniter and the electric ignition head are assembled and connected to form the ignition device with complete functions, so that the test installation process of the engine is simplified;

3) the electric ignition head can be protected from being influenced by external transportation and installation environments, and the overall safety and reliability of the device are improved.

Drawings

Fig. 1 is a schematic structural diagram of a fixed protective cover of an electric igniter provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fixed protective cover of an electric igniter provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a connecting device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a connection device according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1 and 2, a schematic structural diagram of a fixed protective cover of an electric ignition head according to an embodiment of the present invention is shown.

Fig. 1 is a cross-sectional view of a fixed protective cover of an electric ignition head. Fig. 2 is a front two-dimensional external view of the fixed protective cover of the electric ignition head.

As shown in fig. 1 and 2, the fixed protective cover is provided with an inner cavity (not shown in the figure) for accommodating an electric ignition head, and one end (namely, the right end of the structure shown in fig. 1 and 2) of the protective cover is provided with an internal thread (not shown in the figure);

the other end of the fixed protective cover is provided with a circular hole (not shown in the figure), and a short circuit lead of the electric ignition head penetrates out of the circular hole.

In a preferred embodiment of the invention, the depth of the cavity in which the protective cap is fixed is the same as the height of the electric ignition head.

In the present invention, the depth of the cavity for fixing the protective cover may be set according to the height of the electric ignition head, as shown in fig. 1, "L" indicates the depth of the cavity, and "L1" in fig. 2 indicates the width of the fixed protective cover, and L1 is greater than L. The inner cavity of the protective cover is enough to accommodate a designated electric ignition head, the inner depth of the fixed protective cover is set to be consistent with the height size of the electric ignition head, the electric ignition head can be ensured to be installed in place in the installation process, and the top end (one end of a connecting wire) of the electric ignition head is tightly attached to the inner part of the cover top of the fixed protective cover.

In another preferred embodiment of the present invention, the electric firing head is cylindrical in shape, and the diameter of the circular hole is smaller than that of the electric firing head.

In the invention, the diameter of the circular hole arranged at the top end of the fixed protective cover is ensured to be enough to smoothly pass through the short-circuit lead of the electric ignition head and is not more than the diameter of the cylindrical electric ignition head, and the sharp edge of the circular hole can be in arc transition to prevent the short-circuit lead from being scratched in the installation process.

In another preferred embodiment of the invention, an internal thread arranged at one end of the fixed protective cover is matched with an external thread arranged at the detonation end of the baffle igniter, and the length of the internal thread is greater than that of the external thread.

In the invention, the size of the internal thread arranged at one end of the fixed protective cover is matched with the size of the external thread at the detonation end of the baffle igniter, and the thread length of the internal thread is greater than that of the external thread at the detonation end of the baffle igniter, so that the thread meshing tooth number is ensured to be enough to bear certain drawing force.

In another preferred embodiment of the present invention, a rotatable cylindrical rolling straight line is provided on the fixed protective cover, and the cylindrical rolling straight line is fixedly connected with the internal thread, so as to drive the internal thread to be connected with the external thread when the cylindrical rolling straight line rotates.

In the invention, a rotatable outer circle rolling straight line pattern can be arranged on the fixed protective cover, the outer circle rolling straight line pattern can be fixedly connected with the internal thread, the outer circle rolling straight line pattern can facilitate manual rotation of the device, and the internal thread is driven to rotate in the rotating process so as to be fixedly connected with the external thread of the detonation end of the partition plate igniter.

Next, the connection means formed by fixing the protective cover, the electric ignition head and the partition igniter will be described below with reference to fig. 3 and 4.

Referring to fig. 3 and 4, schematic structural diagrams of a connection device according to an embodiment of the present invention are shown.

Fig. 3 is a schematic view of the sequencing of the components before attachment of the protective cap, electrical igniter head and bulkhead igniter. Fig. 4 is a schematic view of the connecting device formed by connecting the fixed protective cover, the electric ignition head and the partition igniter.

As shown in fig. 3 and 4, 1-fixed protective cap, 2-electric ignition head, 3-partition igniter, 4-partition igniter are connected to one end of the engine.

After the short circuit wire with appointed electric ignition head 2 is worn out by the circular port on top from fixed visor inside 1, can be so that electric ignition head 2 is whole to be embedded into fixed visor 1 inner chamber, then the internal thread that the one end of the fixed visor 1 that will embed electric ignition head 2 set up, with the external screw thread connection of the end of detonating of baffle point firearm 3, twist fixed visor 1 soon, the terminal of fixed visor 1 withstands the hexagonal platform of baffle point firearm 3 and can not twist again, the equipment that realizes electric ignition head 2 and baffle point firearm 3 is in place.

The cap-shaped structure and the reliable threaded connection adopted in the embodiment of the invention can fix the electric ignition head 2 in the inner hole of the detonation end of the partition plate igniter 3, and the electric ignition head can not be separated out due to bumping vibration or artificial touch in the transportation or carrying process of the solid rocket engine. The embodiment of the invention can ensure that the electric ignition head is smoothly installed in place by adopting proper size design.

The ignition device formed by assembling the electric ignition head 2 and the partition igniter 3 is installed and connected with an engine through one end of the partition igniter 3 far away from the electric ignition head 2.

The embodiment of the present invention provides the connection device shown in fig. 4 after assembly by sequencing the positions of the securing cap, the electrical ignition head and the bulkhead igniter as shown in fig. 3.

After the engine is installed in place on the test bed, a lead led out by the ignition device is connected into the electric signal input system, so that preparation before test is completed. After an ignition instruction is sent out, the electric ignition head 2 receives an electric signal through a short-circuit lead, the electric ignition head is ignited, so that the partition plate igniter 3 is ignited, the other end of the partition plate igniter 3 ignites an ignition medicine box medicine in the engine, and the medicine box is ignited to ignite the main medicine of the engine.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.