A firing mechanism for a pressure release device

Abstract

The utility model discloses a kind of launch mechanisms of pressure release device, including fixed seat, sealing plug passes through fixed seat and the nozzle of pressure release device is connected, at least two shaft seats are symmetrically distributed on the fixed seat around sealing plug, hoop is hinged on shaft seat, first boss for limiting nozzle is equipped in the inside of upper end of hoop, second boss is equipped in the outside of upper end of hoop, hoop lower end extends outward and is equipped with snap ring at tail end, rubber band is sleeved on snap ring for tightening hoop, a pair of release camber is hinged on fixed seat by first pivot, release camber is arranged around hoop and located below second boss, the end of release camber is equipped with release mechanism for controlling its opening and closing.The utility model overcomes the problem, such as jam, poor synchronism in the process of launching of traditional launch device, greatly improves the launch success rate and launch effect of pressure release device.

Description

Technical Field

[0001] This utility model relates to the field of teaching demonstration tools, specifically to a launching mechanism for a pressure release device. Background Technology

[0002] Water rockets, also known as pneumatic water-jet rockets, are rocket models that use air pressure and water as propellants. High-pressure air rapidly ejects water from the container, generating a reaction force that propels the rocket upwards. Gas rockets, on the other hand, use compressed gas as a power source. High-temperature, high-pressure gas is ejected at high speed through a nozzle, generating a reaction force that propels the rocket forward. Both water and gas rockets are powered by the release of internal pressure. These pressure release devices need to be locked onto the launch mechanism and pressurized before launch. Release is only possible once a certain pressure is reached. This method is also applicable to short-range catapult launches of aircraft, drones, or assisting in the missile ejection phase. Current pressure release devices typically use quick-connect couplings to lock the main body before launch. During launch, the device is released by pulling down the outer ring of the quick-connect coupling. However, this method often results in imbalance or jamming, leading to launch failures.

[0003] Invention patent CN110307752B discloses a claw-type launcher for water rocket launch, which adopts a claw and limiting frame design. Although this solution is smoother and less effort when releasing, and can ensure the success rate of water rocket launch, the limiting frame has a long travel during release and is prone to deflection during movement, resulting in asynchronous release of the claws on both sides, which affects the water rocket launch effect. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a launching mechanism for a pressure relief device, which overcomes the problems of jamming and poor synchronization during the launch process of traditional launching devices, and greatly improves the launch success rate and launch effect of the pressure relief device.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A launching mechanism for a pressure release device includes a fixed base. A sealing plug passes through the fixed base and connects to the nozzle of the pressure release device. At least two shaft seats are symmetrically distributed around the sealing plug on the fixed base. A clamp is hinged to each shaft seat. The inner side of the upper end of the clamp has a first protrusion for limiting the nozzle, and the outer side of the upper end of the clamp has a second protrusion. The lower end of the clamp extends outward from the fixed base and has a retaining ring at its tail end. A rubber band is fitted onto the retaining ring for tightening the clamp. A pair of release bends are hinged to the fixed base via a first rotating shaft. The release bends surround the clamps and are located below the second protrusion. A release mechanism for controlling the opening and closing of the release bends is installed at their ends. During launch, the two release bends are unlocked by the release mechanism. Due to the loss of the limiting effect of the release bends, the clamp flips outward and disengages from the nozzle under the tightening action of the rubber band, and the pressure release device launches.

[0007] Furthermore, the lower part of the second protrusion of the clamp is also provided with a third protrusion for limiting and releasing the bend.

[0008] Furthermore, the number of clamps is four, wherein the width of the first boss of the two clamps closer to the first rotating shaft is smaller than the width of the first boss of the two clamps farther from the first rotating shaft.

[0009] Furthermore, the release mechanism includes a long annular hole at the end of the release bend and a drive motor. The second shaft of the drive motor is inserted into the long annular hole, and the cross-section of the first shaft is racetrack-shaped or elliptical. A limiting protrusion is provided opposite to each other on the inner wall of the two release bends away from the end of the long annular hole.

[0010] Furthermore, the release mechanism includes a through hole at the end of the release bend and a limiting rod inserted into the through hole.

[0011] Furthermore, the lower mating surface of the first boss 51 and the nozzle 3 is set at an angle of 2 to 10° with the horizontal plane.

[0012] Compared with the prior art, the advantages and effects of this utility model are:

[0013] 1. By using the clamps and the nozzle of the pressure release device to limit the movement, and by applying force to the clamps with rubber bands to flip them, not only can the clamps be prevented from jamming during the release process, which would lead to launch failure, but also the clamps can be opened synchronously, ensuring that the pressure release device can launch vertically.

[0014] 2. Two types of clamp structures were designed to overcome the time difference during the release process and avoid the problem of the launch angle deflection of the pressure release device during release;

[0015] 3. Two release bends are used to limit the clamp, which overcomes the problem of long release stroke in the existing technology. At the same time, the release mechanism is formed by the cooperation between the motor shaft and the opening on the release bend. It can not only be used for remote control transmission, but also facilitates installation and reset operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of one type of clamp in this utility model.

[0019] Figure 4 This is a schematic diagram of another structure of the clamp in this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the present invention when the released curved arc closes.

[0021] Figure 6 This is a schematic diagram of the structure when the release arc opens in this utility model.

[0022] Figure 7 This is a diagram showing the usage state of this utility model.

[0023] Part Number Identification: 1. Fixing base; 2. Sealing plug; 3. Nozzle; 4. Shaft seat; 5. Clamp; 51. First boss; 52. Second boss; 53. Snap ring; 54. Third boss; 6. Rubber band; 7. First rotating shaft; 8. Release bend; 81. Long ring hole; 82. Limiting protrusion; 9. Drive motor; 91. Second rotating shaft; 10. Launcher. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0025] Example 1

[0026] The launching mechanism of the pressure relief device described in this embodiment, such as Figure 1As shown in Figures 3 and 7, the device includes a fixed base 1 installed at the center of the launcher 10, a sealing plug 2 installed in the central through hole of the launcher 10 and the fixed base 1, the upper end of the sealing plug 2 being connected to the nozzle 3 for inflating the pressure release device, four bearing seats 4 evenly distributed around the sealing plug 2 on the fixed base 1, the middle section of the clamp 5 being hinged to the bearing seats 4, and a first boss 51 being provided on the inner side of the upper end of the clamp 5, the first boss 51 cooperating with the flange of the side wall of the nozzle 3 to limit its movement, and the first boss 51 and the lower end of the nozzle 3... The mating surface is set at an angle of 2 to 10° with the horizontal plane. The upper outer side of the clamp 5 is provided with a second boss 52. The lower end of the clamp 5 passes through the through hole of the fixing seat 1 and the launcher 10 and extends outward, with a retaining ring 53 with the opening facing outward at the tail end. A rubber band 6 is sleeved on the retaining ring 53 to tighten the clamp 5. A pair of release arcs 8 are hinged on the fixing seat 1 through the first rotating shaft 7. The release arcs 8 are arranged around the clamp 5 and located below the second boss 52. The end of the release arcs 8 is equipped with a release mechanism to control its opening and closing.

[0027] like Figure 2 As shown in Figure 5, the clamps 5 in this embodiment have two forms, with the two clamps 5 closest to the first rotating shaft 7 as follows: Figure 4 As shown, the two clamps 5 that are far from the first rotating shaft 7 are as follows Figure 5 As shown, the lower part of the second protrusion 52 of the two clamps 5 near the first rotating shaft 7 is also provided with a third protrusion 54, which can support the release bend 8 and prevent it from sliding down. In addition, during the opening process of the release bend 8, the two clamps 5 far away from the first rotating shaft 7 will be opened before the two clamps 5 near the first rotating shaft 7. This will cause the pressure release device to deviate during the release process. Therefore, the width of the first protrusion 51 of the two clamps 5 near the first rotating shaft 7 should be slightly smaller than the width of the first protrusion 51 of the two clamps 5 far away from the first rotating shaft 7 in order to avoid the synchronization problem caused by the time difference of the clamps 5 leaving the first protrusion 51.

[0028] like Figure 3 , 4 As shown, the first boss 51 of the clamp 5 and the lower mating surface of the nozzle 3 are set at an angle of 2 to 10° with the horizontal plane, which can prevent the clamp 5 from getting stuck with the side wall flange of the nozzle 3 during the outward flipping process.

[0029] like Figure 5 , 6 As shown, the release mechanism controlling the opening and closing of the release arcs 8 is a drive motor 9. The second shaft 91 of the drive motor 9 has a racetrack-shaped cross-section. Both ends of the two release arcs 8 have elongated annular holes 81, and a limiting protrusion 82 is provided on the inner wall of the elongated annular hole 81 away from the end. The major diameter of the elliptical surface of the second shaft 91 is the same as the inner diameter of the elongated annular hole 81. The second shaft 91, acting as a limiting rod, passes through the two elongated annular holes 81 sequentially. When the two release arcs 8 close to... Figure 5In the indicated state, the sidewall of the second rotating shaft 91 along its long diameter is precisely wedged inside the two limiting protrusions 82, thus restricting the release arc 8 from opening. When it is necessary to open the release arc 8, the second rotating shaft 91 can be rotated clockwise by the drive motor 9. When the long diameter of the second rotating shaft 91 rotates to be perpendicular to the line connecting the centers of the two limiting protrusions 82, the second rotating shaft 91 can then break free from the restriction of the limiting protrusions 82 and open. The release arc 8 is stretched open under the tension of the clamp 6, but due to the restriction of the second rotating shaft 91, the release arc 8 can only open to a maximum extent as shown. Figure 6 As shown, the second rotating shaft 91 is located at the tail end inside the two long ring holes 81, which can prevent the two release arcs 8 from opening too wide and causing the clamp 5 to come off. It also facilitates the installation and reset operation when launching again.

[0030] The working principle of this utility model is as follows:

[0031] 1. Before launch, close the release arc 8 and adjust the angle of the second rotating shaft 91 so that it is locked inside the two limiting protrusions 82. At this time, both release arcs 8 press the clamp 5 inward, so that the first protrusion 51 of the clamp 5 is locked on the flange of the nozzle 3 to limit the pressure release device. Then, the pressure release device is inflated through the air pipe in the sealing plug 2.

[0032] 2. During launch, the second rotating shaft 91 is rotated by the drive motor 9. When it rotates to a certain angle, the second rotating shaft 91 can be released from the restriction of the two limiting protrusions 82. At this time, under the tightening action of the rubber band 6, the four clamps 5 flip outward in sync, so that the two release arcs 8 are pushed outward, the nozzle 3 is released from the limit of the clamps 5, and the pressure release device is launched into the air.

[0033] Example 2

[0034] The launching mechanism of the pressure release device described in this embodiment differs from that in Embodiment 1 in that the release mechanism includes a circular through hole at the end of the release bend 8 and a limiting rod that cooperates with the through hole. When the limiting rod is inserted into the circular through hole of the two release bends 8, the two release bends 8 can be limited. When the limiting rod is pulled out under the action of external force, the release bends 8 can open.

Claims

1. A launching mechanism for a pressure relief device, comprising a fixed base (1), a sealing plug (2) passing through the fixed base (1) and connected to a nozzle (3) of the pressure relief device, characterized in that: At least two bearings (4) are symmetrically distributed around the sealing plug (2) on the fixed seat (1). A clamp (5) is hinged on the bearing (4). A first boss (51) for limiting the nozzle (3) is provided on the inner side of the upper end of the clamp (5). A second boss (52) is provided on the outer side of the upper end of the clamp (5). The lower end of the clamp (5) extends outward from the fixed seat (1) and a retaining ring (53) is provided at the tail end. A rubber band (6) is sleeved on the retaining ring (53) for tightening the clamp (5). A pair of release arcs (8) are hinged on the fixed seat (1) through a first rotating shaft (7). The release arcs (8) are arranged around the clamp (5) and located below the second boss (52). A release mechanism for controlling the opening and closing of the release arcs (8) is installed at the end of the release arcs (8).

2. The launching mechanism of a pressure relief device according to claim 1, characterized in that: The lower part of the second protrusion (52) of the clamp (5) is also provided with a third protrusion (54) for limiting the release of the bend (8).

3. The launching mechanism of a pressure relief device according to claim 1, characterized in that: The number of clamps (5) is four, wherein the width of the first boss (51) of the two clamps (5) closer to the first rotating shaft (7) is smaller than the width of the first boss (51) of the two clamps (5) farther away from the first rotating shaft (7).

4. The launching mechanism of a pressure relief device according to claim 1, characterized in that: The release mechanism includes a long annular hole (81) opened at the end of the release bend (8) and a drive motor (9). The second shaft (91) of the drive motor (9) is inserted into the long annular hole (81), and the cross-section of the second shaft (91) is racetrack-shaped or elliptical. A limiting protrusion (82) is provided on the inner wall of the two release bends (8) away from the end of the long annular hole (81).

5. The launching mechanism of a pressure relief device according to claim 1, characterized in that: The release mechanism includes a through hole at the end of the release bend (8) and a limiting rod inserted into the through hole.

6. The launching mechanism of a pressure relief device according to claim 1, characterized in that: The lower mating surface of the first boss (51) and the nozzle (3) is set at an angle of 2 to 10° with the horizontal plane.

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