A pressure sensing ignition device for a rocket model

Abstract

The application relates to a pressure-sensing ignition device and a rocket model. The pressure-sensing ignition device comprises a body, the body is arranged between a first connecting piece and a second connecting piece, the body comprises an ignition piece and a pressure monitoring assembly; the pressure monitoring assembly is arranged towards the first connecting piece and connected with the first connecting piece, and is used for monitoring the pressure change of the first connecting piece; the ignition piece is arranged towards the second connecting piece and connected with the second connecting piece, so that the fuel in the second connecting piece is ignited when the pressure change of the first connecting piece reaches a set value, and automatic ignition is realized. The pressure-sensing ignition device provided by the application has the advantages of simple structure, good stability and high reusability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ignition, in particular to a pressure sensing ignition device and a rocket model. BACKGROUND

[0002] The rocket model is regarded as an important practical project in the aerospace course. The rocket model technology can not only be used for labor teaching, but also be applied to the teaching of basic courses to deepen students' understanding of basic courses and help students learn and master the knowledge of aerodynamics and flight mechanics.

[0003] However, the traditional rocket model relies on manual remote control for two-stage separation. This method has the advantages of high feasibility, simple operation and high cost performance. However, this method is manually controlled by the operator for two-stage separation, and the separation time cannot be accurately grasped, so there is a problem of deviation in the ignition time, which affects the teaching quality.

[0004] In the prior art, the timing ignition designed by the electric module needs complex circuit design on the one hand, and on the other hand, when combined with some rocket bodies, short circuit and other problems caused by low robustness of the electric control system are prone to occur. SUMMARY

[0005] Therefore, it is necessary to provide a pressure sensing ignition device that can automatically control the optimal ignition time and can be used in a rocket model, which has a simple structure.

[0006] A pressure sensing ignition device, comprising a body, the body is arranged between a first connecting piece and a second connecting piece, the body comprises an ignition piece and a pressure monitoring assembly; the pressure monitoring assembly is arranged towards the first connecting piece and connected with the first connecting piece to monitor the pressure change of the first connecting piece; the ignition piece is arranged towards the second connecting piece and connected with the second connecting piece to ignite the fuel in the second connecting piece when the pressure change of the first connecting piece reaches a set value.

[0007] In one embodiment, the pressure sensing ignition device further comprises a separation transmission spring groove and a traction rope; the separation transmission spring groove is arranged on the body, a first spring is fixed in the groove, the first spring has a pre-tightening state and a natural state; when the first spring is in the pre-tightening state, one end of the traction rope is connected with the pressure monitoring assembly and the other end is connected with the second connecting piece, the ignition piece is in contact with the fuel end of the second connecting piece; when the first spring is in the natural state, the traction rope is separated from the pressure monitoring assembly, and the ignition piece generates an electric spark to ignite the fuel of the second connecting piece.

[0008] In one embodiment, the second connecting piece is provided with compression rods, the number of the compression rods corresponds to the number of the separate transmission spring slots; when the first connecting piece and the second connecting piece are combined, the compression rods enter the separate transmission spring slots and abut against the first springs, thereby giving the first springs pre-tightening force; when the first connecting piece and the second connecting piece are separated, the first springs eject the compression rods from the separate transmission spring slots by the pre-tightening force, and the first springs return to the natural state.

[0009] In one embodiment, the body is further provided with a traction rope hole, and a traction rope is sleeved on the pressure monitoring assembly after passing through the traction rope hole.

[0010] In one embodiment, the pressure monitoring assembly comprises a pressure cavity, a pressure piston and a connecting pipe; the pressure piston and the connecting pipe are respectively arranged on two sides of the pressure cavity; the pressure piston and the pressure cavity are in sliding sealing cooperation; one end of the connecting pipe is connected with the pressure cavity, and the other end is connected with the first connecting piece, for monitoring the pressure change of the first connecting piece.

[0011] In one embodiment, the pressure piston comprises a sealing member and a pressure rod; the sealing member is arranged in the pressure cavity and is in sliding sealing cooperation with the pressure cavity; one end of the pressure rod is fixed on the sealing member, and the other end extends out of the pressure cavity, and a traction rope is sleeved on the end portion of the pressure rod.

[0012] In one embodiment, the pressure monitoring assembly further comprises a fixed base, the pressure monitoring assembly is fixed on one side of the body through the fixed base; the pressure rod is in clearance fit with the fixed base after extending out of the pressure cavity, and the traction rope is sleeved on the pressure rod and located between the fixed base and the pressure cavity.

[0013] In one embodiment, the ignition device comprises a shell, a negative electrode of an ignition head is arranged on the side wall of the shell; a positive electrode of the ignition head is arranged on the end portion of the shell, when the first spring changes from the pre-tightening state to the natural state, the negative electrode of the ignition head contacts the positive electrode of the ignition head, the ignition device generates sparks to ignite the fuel.

[0014] In one embodiment, a conductive piston is arranged in the shell, the shell and the conductive piston are in sliding sealing cooperation, a conductor rod is fixed on the conductive piston, a positive electrode of the ignition head and an ignition head are fixed on the upper end of the conductor rod, a connecting rope is arranged on the ignition head, when the first spring changes from the pre-tightening state to the natural state, the connecting rope pulls the conductor rod to move upward, so that the conductive piston moves upward to contact the negative electrode of the ignition head, thereby forming an electric path, the ignition head generates sparks to ignite the fuel.

[0015] A rocket model, comprising the pressure sensing ignition device of any one of the above.

[0016] Compared with the prior art, the pressure sensing ignition device and the rocket model provided by the application have the following effects:

[0017] 1. By the pressure sensing ignition device, the optimal ignition time of the second connecting piece can be found, and automatic ignition of the second connecting piece is realized.

[0018] 2. The structure is simple, stable, and has high reusability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A front isometric view of the pressure sensing ignition device provided for an embodiment;

[0020] Figure 2 A back isometric view of the pressure sensing ignition device provided for an embodiment;

[0021] Figure 3 A sectional view of the pressure sensing ignition device provided for an embodiment;

[0022] Figure 4 An isometric view of the pressure monitoring assembly provided for an embodiment;

[0023] Figure 5 A structure schematic view of the ignition device provided for an embodiment;

[0024] Figure 6 A structure schematic view of the rocket model provided for an embodiment;

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] The pressure monitoring assembly 2, the pressure cavity 21, the sealing member 221, the pressure rod 222, the second spring 223, the connecting pipe 23, and the fixed base 24.

[0027] The ignition device 3, the shell 31, the ignition head negative electrode 32, the ignition head positive electrode 33, the ignition head 34, the conductive piston 35, the conductor rod 36, and the connecting rope 37.

[0028] The first connecting piece 41, the second connecting piece 42, and the compression rod 421. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0030] It should be noted that all directional indications, such as upper, lower, left, right, front, back, and the like, are used for explanation purposes only and do not limit the position, movement, and the like of the components relative to each other.

[0031] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implicitly indicating the number of technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The pressure sensing ignition device provided by the present application includes but is not limited to secondary rocket model ignition experiment, and is also suitable for automatic ignition of other equipment. Mainly through the change of the pressure in the equipment, when the pressure change reaches the set value, the fuel is ignited by electric spark.

[0034] As shown in Figures 1-6 The structure schematic diagram of the pressure sensing ignition device provided by the present application is shown in the figure, which includes a body 1, the body 1 is arranged between a first connecting piece 41 and a second connecting piece 42, and a pressure monitoring assembly 2, an ignition piece 3, a separation transmission spring groove 11 and a traction rope 12 are arranged on the body 1.

[0035] Specifically, the body 1 is fixed on the first connecting piece 41, the pressure monitoring assembly 2 is arranged on the side facing the first connecting piece 41, and the ignition point 3 is arranged on the side facing the second connecting piece 42. The pressure monitoring assembly 2 monitors the pressure change in the first connecting piece 41; when the pressure change reaches a set value, the fuel on the second connecting piece 42 is ignited by the ignition point 3. A plurality of separation transmission spring grooves 11 are uniformly arranged in the body 1 in a ring shape, forming a cylindrical cavity structure with one end closed and one end open, and the opening faces the first connecting piece 41. The first spring 13 is fixed in the cavity. The second connecting piece 42 is arranged opposite to the compression rod 421, and the thickness of the compression rod 421 is adapted to the opening of the separation transmission spring groove 11. When the second connecting piece 42 is combined with the first connecting piece 41, the compression rod 421 is aligned with the separation transmission spring groove 11, the compression rod 421 enters the separation transmission spring groove 11 and compresses the first spring 13, the traction rope 12 is connected with the pressure monitoring assembly 2, and the ignition point 3 is in contact with the fuel end of the second connecting piece 42. When the second connecting piece 42 is separated from the first connecting piece 41, the first spring 13 ejects the compression rod 421 from the separation transmission spring groove 11, the traction rope 12 is separated from the pressure monitoring assembly 2, the ignition point 3 circuit is turned on, an electric spark is generated to ignite the fuel of the second connecting piece 42, and the ignition is automatically completed.

[0036] The pressure monitoring assembly 2 comprises a pressure cavity 21, a pressure piston, a connecting pipe 23 and a fixed base 24; the pressure piston and the connecting pipe 23 are arranged on both sides of the pressure cavity 21, the pressure cavity 21 is fixed on the body 1 through the fixed base 24, the pressure piston is in sliding sealing cooperation with the pressure cavity 21, one end of the connecting pipe 23 is connected with the pressure cavity 21, and the other end extends into the first connecting piece 41 to monitor the pressure change of the first connecting piece 41.

[0037] Specifically, first and second through holes are arranged on both sides of the pressure cavity 21. The first through hole is adapted in size to the outer wall of the connecting pipe 23, so as to facilitate the insertion of the connecting pipe 23 into the first through hole and the connection with the inner cavity of the pressure cavity 21. In order to ensure the air tightness, an air tight rubber ring is additionally arranged at the connection position.

[0038] The pressure piston comprises a sealing member 221, a pressure rod 222 and a second spring 223. The sealing member 221 is arranged in the pressure cavity 21 and is in sliding sealing cooperation with the pressure cavity 21. One end of the pressure rod 222 is fixed on the sealing member 221, and the other end extends out of the second through hole and is sleeved with the traction rope 12 near the end. The two ends of the second spring 223 are fixed on the sealing member 221 and the pressure cavity 21, respectively. When the air pressure in the pressure cavity 21 changes, the second spring 223 changes between the pre-tightening state and the natural state, thereby driving the sealing member 221 and the pressure rod 222 to move back and forth.

[0039] The fixed base 24 is also provided with a third through hole opposite the second through hole, and the pressure rod 222 is inserted into the third through hole after extending from the second through hole and is in clearance fit with the third through hole. The traction rope 12 is sleeved on the pressure rod 222 and located between the second through hole and the third through hole. It is worth mentioning that the body 1 is also provided with a traction rope hole 14, one end of the traction rope 12 is sleeved on the pressure rod 222, and the other end passes through the traction rope hole 14 and is connected with the second connecting piece 42, so that the stability of the connection between the first connecting piece 41 and the second connecting piece 42 can be further ensured.

[0040] One end of the connecting pipe 23 is connected with the inner cavity of the pressure cavity 21, and the other end is inserted into the first connecting piece 41, so that the same air pressure is formed between the first connecting piece 41 and the pressure cavity 21. During operation, the pressure in the first connecting piece 41 is relatively large in the initial stage, and the pressure cavity 21 also has a relatively large air pressure, so that the compression sealing piece 221 is compressed, the second spring 223 is in a pre-tightening state, and the pressure rod 222 is inserted into the third through hole; after launching, the pressure in the first connecting piece 41 gradually decreases, the air pressure of the pressure cavity 21 also gradually decreases, the second spring 223 changes from the pre-tightening state to the natural state, so as to push the compression sealing piece 221 to move towards the pressure cavity 21, drive the pressure rod 222 to separate from the third through hole, and the traction rope 12 separates from the pressure rod 222.

[0041] The ignition device 3 is arranged on the side close to the second connecting piece 42, is coaxially fixed on the body 1, and includes a shell 31. The shell 31 is provided with an ignition head negative pole 32 on the side wall, is provided with a conductive piston 35 in the inside, the conductive piston 35 is in sliding sealing fit with the inner wall of the shell 31, the conductive piston 35 is fixed with a conductor rod 36, the conductor rod 36 is fixed with an ignition head positive pole 33 and an ignition head 34. One end of a connecting rope 37 is connected with the ignition head 34, and the other end is connected with the second connecting piece 42. When the first spring 13 changes from the pre-tightening state to the natural state, the connecting rope 37 pulls the conductor rod 36 to move upwards, so that the conductive piston 35 is in contact with the ignition head negative pole 32, and then the ignition head negative pole 32 and the ignition head positive pole 33 form an electric path, the ignition head 34 generates an electric spark, ignites the fuel of the second connecting piece 42, and separates from the second connecting piece 42 after automatic ignition.

[0042] In one embodiment, a rocket model is also provided, which is automatically ignited by using the pressure sensing ignition device.

[0043] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0044] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A pressure sensing ignition device comprising a body disposed between a first connector and a second connector, characterized in that, The body comprises an ignition device and a pressure monitoring assembly; The pressure monitoring assembly is arranged towards and connected with the first connecting piece to monitor the pressure change of the first connecting piece; The ignition device is arranged towards and connected with the second connecting piece to ignite the fuel in the second connecting piece when the pressure change of the first connecting piece reaches a set value; Further comprising: a separation transmission spring groove and a traction rope; The separation transmission spring groove is arranged on the body, and a first spring is fixed in the groove, the first spring having a pre-tightening state and a natural state; When the first spring is in the pre-tightening state, one end of the traction rope is connected with the pressure monitoring assembly, and the other end is connected with the second connecting piece, and the ignition device is in contact with the fuel end of the second connecting piece; When the first spring is in the natural state, the traction rope is separated from the pressure monitoring assembly, and the ignition device generates an electric spark to ignite the fuel in the second connecting piece; The pressure monitoring assembly comprises a pressure cavity, a pressure piston and a connecting pipe; The pressure piston and the connecting pipe are respectively arranged on two sides of the pressure cavity; The pressure piston and the pressure cavity are in sliding sealing cooperation; One end of the connecting pipe is connected with the pressure cavity, and a gas-tight rubber ring is additionally arranged at the connection; the other end is connected with the first connecting piece to monitor the pressure change of the first connecting piece.

2. A pressure sensing ignition device according to claim 1, wherein A plurality of compression rods are arranged on the second connecting piece, and the number of the compression rods corresponds to the number of the separation transmission spring grooves; When the first connecting piece and the second connecting piece are combined, the compression rods enter the separation transmission spring grooves and abut against the first spring to give the first spring a pre-tightening force; When the first connecting piece and the second connecting piece are separated, the first spring drives the compression rods out of the separation transmission spring grooves by the pre-tightening force, and the first spring returns to the natural state.

3. A pressure sensing ignition device according to claim 1 or 2, wherein A traction rope hole is further arranged on the body, and the traction rope is sleeved on the pressure monitoring assembly after passing through the traction rope hole.

4. A pressure sensing ignition device as defined in claim 1, wherein The pressure piston comprises a sealing member and a pressure rod; The sealing member is arranged in the pressure cavity and in sliding sealing cooperation with the pressure cavity; One end of the pressure rod is fixed on the sealing member, and the other end of the pressure rod extends out of the pressure cavity, and a traction rope is sleeved on the end of the pressure rod.

5. A pressure sensing ignition device as defined in claim 4 wherein, The pressure monitoring assembly further comprises a fixing base, and the pressure monitoring assembly is fixed on one side of the body through the fixing base; The pressure rod is in clearance fit with the fixing base after extending out of the pressure cavity, and the traction rope is sleeved on the pressure rod and located between the fixing base and the pressure cavity.

6. A pressure sensing ignition device according to claim 4 or 5, wherein The ignition device comprises a shell, a negative electrode of an ignition head is arranged on the side wall of the shell, and a positive electrode of the ignition head is arranged on the end of the shell; when the first spring changes from the pre-tightening state to the natural state, the negative electrode of the ignition head is in contact with the positive electrode of the ignition head, the ignition device generates a spark to ignite the fuel.

7. A pressure sensing ignition device as defined in claim 6 wherein, A conductive piston is arranged in the shell, and the shell and the conductive piston are in sliding sealing cooperation; A conductor rod is fixed on the conductive piston, and a positive electrode of the ignition head and an ignition head are fixed on the upper end of the conductor rod. The ignition head is provided with a connecting rope, when the first spring changes from the pre-tightening state to the natural state, the connecting rope pulls the conductor rod to move upward, so that the conductive piston moves upward to contact the negative electrode of the ignition head, thereby forming an electric path, the ignition head generates a spark to ignite the fuel.

8. A rocket model, characterized in that The rocket model comprises a pressure sensing ignition device according to any one of claims 1-7.

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