Handheld emitter based on supercritical carbon dioxide phase change driving

Abstract

The invention provides a handheld emitter based on supercritical carbon dioxide phase change driving, which comprises a handle assembly for holding; the emitting assembly is arranged above the handle assembly; the emission assembly comprises an emission cylinder, a phase change generation cylinder, a heating piece and a pressure control diaphragm; the launching cylinder is used for containing shots. The phase change generation cylinder is connected with the launching cylinder and filled with liquid carbon dioxide in a sealed mode. The heating piece is located in the phase change generation cylinder and used for heating the liquid carbon dioxide; the pressure control diaphragm is arranged in a flow channel between the phase change generation cylinder and the launching cylinder and is configured to be broken when the pressure reaches a preset threshold value; the handle assembly comprises a power source and a trigger, and the trigger is used for controlling connection and disconnection between the power source and the heating piece. The low critical temperature and pressure conditions of carbon dioxide are utilized, the heating and pressure releasing process is controlled, the phase change of the carbon dioxide from the liquid state to the supercritical state is completed in the closed cavity, and therefore efficient gas-driven emission is achieved within the controllable energy range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas emission, and in particular to a handheld emitter based on supercritical carbon dioxide phase change driving. BACKGROUND

[0002] The gas emission device is widely used in civil rescue, teaching demonstration and light-weight throwing system and other fields. The traditional scheme mainly relies on two types of driving mechanisms: one is to use high-pressure compressed gas cylinder to provide power, and the other is to ignite high-temperature and high-pressure gas by using firework (such as gunpowder) to achieve emission.

[0003] In the process of implementing the present application, the inventors found that at least the following problems exist in the above two types of schemes: in the first type of scheme, the high-pressure compressed gas system usually needs a high charging pressure to meet the emission kinetic energy requirement, resulting in a large overall volume and a large weight, which is not conducive to portable use; at the same time, its energy density is low, and it is difficult to provide continuous or multiple effective emission capabilities in a limited space. In the second type of scheme, the driving mode based on firework such as gunpowder can release high energy instantaneously, but there are significant safety hazards, including explosion risks in the transportation, storage and operation processes, and it is often subject to strict legal and regulatory restrictions and can only be used by specific qualified parties, which greatly limits its promotion and application in civilian scenarios. SUMMARY

[0004] The present application aims to at least partially solve one of the problems in the related art.

[0005] To this end, the present application proposes a handheld emitter based on supercritical carbon dioxide phase change driving, which has the characteristics of high safety, compact structure and simple operation.

[0006] To achieve the above-mentioned purpose, the present application proposes a handheld emitter based on supercritical carbon dioxide phase change driving, which comprises: a handle assembly for holding; a launch assembly arranged above the handle assembly; The launch assembly comprises a launch barrel, a phase change generating barrel, a heating element and a pressure control diaphragm; the launch barrel is used to accommodate a projectile; the phase change generating barrel is connected with the launch barrel and is internally sealed and filled with liquid carbon dioxide; the heating element is located in the phase change generating barrel and is used to heat the liquid carbon dioxide; the pressure control diaphragm is arranged in the flow channel between the phase change generating barrel and the launch barrel and is configured to break when the pressure reaches a preset threshold; the handle assembly comprises a power supply and a trigger, and the trigger is used to control the on-off between the power supply and the heating element; When the trigger is pulled, the heating element is powered to heat, and liquid carbon dioxide enters a supercritical state, when the pressure in the phase change cylinder reaches the preset threshold of the pressure control diaphragm, the pressure control diaphragm breaks, and the supercritical carbon dioxide pushes the projectile out of the launch cylinder.

[0007] According to one embodiment of the present application, the rear end of the phase change cylinder is provided with a connecting portion, and the air inlet plug is threadedly connected with the connecting portion; an air inlet channel is arranged in the connecting portion and communicates with the inner cavity of the phase change cylinder, and is used for connecting with an external device to fill liquid carbon dioxide.

[0008] According to one embodiment of the present application, the launch assembly further comprises an electrically conductive column, the electrically conductive column is arranged through the connecting portion, one end of the electrically conductive column is connected with the heating element, and the other end of the electrically conductive column is electrically connected with the trigger through a wire.

[0009] According to one embodiment of the present application, the pressure control diaphragm is provided with a cross-shaped groove on the side facing the air inlet plug, and the cross-shaped groove is used for guiding the pressure control diaphragm to break along the cross-shaped groove.

[0010] According to one embodiment of the present application, the pressure control diaphragm is protruded to one side of the launch cylinder.

[0011] According to one embodiment of the present application, the launch assembly further comprises an air release plug, the air release plug is threadedly connected with the phase change cylinder at an end away from the air inlet plug; a plurality of pressure relief holes are circumferentially arranged on the side wall of the air release plug, and an annular gap is arranged between the outer circumferential surface of the pressure relief hole and the inner wall of the launch cylinder.

[0012] According to one embodiment of the present application, the heating element comprises a resistance wire and an insulating shell, the resistance wire is packaged in the insulating shell, and the insulating shell is connected with the connecting portion.

[0013] Compared with the prior art, the present application has the following beneficial effects: 1. The handheld launcher based on supercritical carbon dioxide phase change driving according to the present application fills liquid carbon dioxide in the phase change cylinder, uses the heating element to make the liquid carbon dioxide change into supercritical carbon dioxide, and the supercritical carbon dioxide instantaneously expands to break the pressure control diaphragm and push the projectile out, completely abandoning the firecracker and combustible material in the prior art, realizing that the energy conversion process does not produce open fire and explosion risk, and fundamentally improving the safety in use.

[0014] 2. The transmitter of the present application integrates gas energy storage, heating phase change and launching guide system in one, and the overall structure is modularly assembled through threaded connection, which not only ensures the strength, but also facilitates disassembly and maintenance. Compared with the large-scale launching equipment in the prior art, the transmitter is small in size, light in weight, and can be operated by one hand, and is suitable for occasions with high portability requirements such as field environment and rescue tasks.

[0015] 3. The transmitter of the present application uses carbon dioxide as working medium, and utilizes its low critical temperature and pressure characteristics for phase change driving. The entire launching process does not produce harmful gas and solid residue, and has significant environmental protection characteristics, which conforms to the current green energy and low-carbon development technology trend.

[0016] 4. The pressure control diaphragm used in the transmitter of the present application limits the breaking pressure point through material thickness, strength and geometric structure (such as cross-shaped grooves), so that the pressure control diaphragm breaks when the set pressure is reached, thereby realizing the fixed value release of supercritical carbon dioxide gas energy. The use of the pressure control diaphragm effectively avoids energy output fluctuation, so that the pressure and projectile initial velocity of each launch remain consistent, greatly improving the launch repeatability and stability.

[0017] 5. The transmitter of the present application locks the maximum safe working pressure within the design range through the preset breaking strength of the pressure control diaphragm. When the cavity pressure of the phase change cylinder abnormally rises, the pressure control diaphragm breaks to release gas first, forming a safe relief path, and avoiding damage to the phase change cylinder body or sealing structure.

[0018] 6. The transmitter of the present application sets a pressure relief hole on the gas leakage plug and adopts an axial sealing structure, so that when the supercritical carbon dioxide is released, the gas is sprayed along the radial direction into the annular gap, avoiding the broken fragments of the pressure control diaphragm from escaping with the gas flow, effectively preventing damage to the launching cylinder and projectile, and significantly improving the safety and stability of the transmitter.

[0019] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are merely illustrative and are not considered to be limiting on the present application. Furthermore, like reference numerals denote like parts throughout the several views of the drawings. Among others: Figure 1 is a structural schematic diagram of a handheld launcher based on supercritical carbon dioxide phase change driving in an embodiment of the present application.

[0021] Figure 2is a structural schematic diagram of a phase change generating cylinder in an embodiment of the present application.

[0022] Figure 3 is a structural schematic diagram of a launching cylinder in an embodiment of the present application.

[0023] Figure 4 is a structural schematic diagram of a pressure control diaphragm in an embodiment of the present application.

[0024] Figure 5 is a structural schematic diagram of a gas leakage plug in an embodiment of the present application.

[0025] Legend: 1 - launching cylinder; 2 - projectile; 3 - phase change generating cylinder; 4 - gas inlet plug; 5 - gas leakage plug; 6 - conductive column; 7 - heating element; 8 - pressure control diaphragm; 9 - power supply; 10 - trigger; 401 - gas inlet channel; 501 - pressure relief hole. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals are used throughout the drawings to refer to the same or like elements or elements having the same or similar functionality. The embodiments described below are exemplary and are not intended to limit the scope of the present application. Rather, the scope of the present application encompasses all modifications, variations and alternatives falling within the spirit and scope of the claims appended hereto.

[0027] The embodiments of the present application will be described below with reference to Figures 1 to 5 , a handheld launcher driven by phase change of supercritical carbon dioxide according to an embodiment of the present application.

[0028] Referring to Figure 1 , a handheld launcher driven by phase change of supercritical carbon dioxide according to an embodiment of the present application, comprises a handle assembly and a launching assembly. The handle assembly is used for holding. The launching assembly is arranged above the handle assembly. The launching assembly is detachably connected with the handle assembly, such as snap connection. The handle assembly has at least one grip, such as a front grip, a rear grip, etc.

[0029] The launching assembly includes a launching barrel 1, a phase change generating barrel 3, a heating element 7 and a pressure control diaphragm 8. The launching barrel 1 is used to accommodate a projectile 2, the outer diameter of the projectile 2 is matched with the inner diameter of the launching barrel 1. The phase change generating barrel 3 is connected with the launching barrel 1 and is internally sealed and filled with liquid carbon dioxide. The phase change generating barrel 3 is threadedly connected with the launching barrel 1 and is easy to disassemble. The phase change generating barrel 3 is a main pressure-bearing element and forms a controllable phase change space inside. The heating element 7 is located in the phase change generating barrel 3 and is used to heat the liquid carbon dioxide. The specific type of the heating element 7 is designed according to actual needs, for example, a resistance heating type, an electromagnetic heating type, etc. The pressure control diaphragm 8 is arranged in a flow channel between the phase change generating barrel 3 and the launching barrel 1 and is configured to break when the pressure reaches a preset threshold. The pressure control diaphragm 8 plays a dual role of pressure control and pressure release triggering. The pressure control diaphragm 8 can be made of metal or high polymer composite material, and the thickness and material thereof can be selected according to different launching requirements to set the rupture pressure of the supercritical carbon dioxide gas.

[0030] The handle assembly includes a power supply 9 and a trigger 10, and the trigger 10 is used to control the on-off between the power supply 9 and the heating element 7. The power supply 9 is built into the front grip or the rear grip. The power supply 9 can adopt a battery or other types of applicable power supply. The trigger 10 is used to start the triggering process.

[0031] When the trigger 10 is pulled, the heating element 7 is powered to heat, rapidly heats up and transfers heat to the liquid carbon dioxide in the cavity of the phase change generating barrel 3, so that the liquid carbon dioxide is heated and phase changes into a supercritical fluid under controlled conditions. As the phase change progresses, the pressure in the cavity of the phase change generating barrel 3 rapidly rises to a preset threshold, and when the pressure in the phase change generating barrel 3 reaches the preset threshold of the pressure control diaphragm 8, the pressure control diaphragm 8 breaks, instantaneously transfers the pneumatic force to the projectile 2, and makes the projectile 2 be pushed out at high speed along the launching direction of the launching barrel 1 and complete launching. After launching is completed, the handheld launcher driven by the phase change of supercritical carbon dioxide enters a safe reset state, the power supply is turned off, and the pressure in the cavity of the phase change generating barrel 3 falls. The operator can disassemble and replace the pressure control diaphragm 8, refill the carbon dioxide and prepare for the next launching according to the above steps.

[0032] The handheld launcher driven by the phase change of supercritical carbon dioxide according to the embodiment of the application fills the liquid carbon dioxide in the phase change generating barrel, uses the heating element to make the liquid carbon dioxide phase change into supercritical carbon dioxide, and the supercritical carbon dioxide instantaneously expands, breaks the pressure control diaphragm and pushes the projectile to shoot. The handheld launcher completely abandons the existing technology of initiating explosive and combustible materials, realizes that the energy conversion process does not produce open fire and explosion risk, and fundamentally improves the safety in the use process.

[0033] As Figure 2As shown, in some embodiments, the handheld transmitter driven by supercritical carbon dioxide phase change also includes an air inlet plug 4. A connecting portion is provided at the rear end of the phase change generating cylinder 3, and the air inlet plug 4 is threadedly connected to the connecting portion. An air inlet channel 401 is provided within the connecting portion, communicating with the inner cavity of the phase change generating cylinder 3 for connecting external devices to fill with liquid carbon dioxide. The heating element 7 includes a resistance wire and an insulating shell. The resistance wire is encapsulated within the insulating shell, which is connected to the connecting portion. The resistance wire heats the liquid carbon dioxide inside the phase change generating cylinder 3 through a resistance effect.

[0034] The launching assembly also includes a conductive post 6, which is axially disposed on the connecting part along the phase change generating cylinder 3. The conductive post 6 can be made of a metal conductor, such as copper. One end of the conductive post 6 passes through the insulating shell of the heating element 7 and is electrically connected to the resistance wire, while the other end of the conductive post 6 is electrically connected to the trigger 10 via a wire. Thus, when the trigger 10 is triggered, the power supply 9 supplies power to the heating element 7 via the conductive post 6.

[0035] like Figure 4 As shown, in some embodiments, the pressure-controlled diaphragm 8 has a cross-shaped groove on the side facing the air inlet plug 4. The cross-shaped groove guides the pressure-controlled diaphragm 8 to rupture directionally along the groove. The depth of the cross-shaped groove is 10%–50% of the diaphragm thickness. Of course, the cross-shaped groove can also be replaced by a star-shaped groove or other types of grooves to achieve rapid and controllable pressure relief and gas release. In addition, the pressure-controlled diaphragm 8 protrudes towards the side of the launch tube 1. The protruding structure, due to stress concentration at the cross-shaped groove at the moment of rupture, is more likely to tear along the designed path.

[0036] Combination Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the launching assembly further includes a vent plug 5, which is threadedly connected to the phase change generating cylinder 3 at the end away from the air inlet plug 4. The vent plug 5 has multiple pressure relief holes 501 circumferentially arranged on its sidewall, with an annular gap between the outer circumferential surface of the pressure relief holes 501 and the inner wall of the launching cylinder 1. The number of pressure relief holes 501 is set according to actual needs and is not limited thereto; for example, there are four pressure relief holes 501, evenly arranged. The axially closed end face of the vent plug 5 can effectively block the tiny fragments generated by the pressure control diaphragm 8 breaking along the cross-shaped groove or other weakened parts during rupture, preventing them from flying forward with the high-pressure airflow into the launching cylinder 1, thereby avoiding interference with or damage to the launching cylinder 1.

[0037] Overall, the hand-held launcher based on supercritical carbon dioxide phase change driving provided by the embodiment of the application is significantly superior to the prior art in safety, structural compactness, energy controllability, environmental protection and applicability, especially in the field of portable and civilian gas power launch, a new, safe and efficient technical solution is provided, and the application has good popularization and industrialization prospects.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. 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.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A handheld transmitter driven by supercritical carbon dioxide phase change, characterized in that, include: Handle assembly for gripping; The launching component is located above the handle component; The launching assembly includes a launching tube (1), a phase change generating tube (3), a heating element (7), and a pressure control diaphragm (8); the launching tube (1) is used to contain a projectile (2); the phase change generating tube (3) is connected to the launching tube (1) and is internally sealed and filled with liquid carbon dioxide; the heating element (7) is located inside the phase change generating tube (3) and is used to heat the liquid carbon dioxide; the pressure control diaphragm (8) is located in the flow channel between the phase change generating tube (3) and the launching tube (1) and is configured to rupture when the pressure reaches a preset threshold; the handle assembly includes a power supply (9) and a trigger (10), the trigger (10) being used to control the on / off connection between the power supply (9) and the heating element (7); When the trigger (10) is pulled, the heating element (7) is energized and heats up, causing the liquid carbon dioxide to enter a supercritical state. When the pressure inside the phase change generating cylinder (3) reaches the preset threshold of the pressure control diaphragm (8), the pressure control diaphragm (8) ruptures, and the supercritical carbon dioxide pushes the projectile (2) out along the launching cylinder (1).

2. The handheld transmitter based on supercritical carbon dioxide phase change as described in claim 1, characterized in that, It also includes an air inlet plug (4), and the rear end of the phase change generator cylinder (3) is provided with a connecting part, and the air inlet plug (4) is threadedly connected to the connecting part; the connecting part is provided with an air inlet channel (401), and the air inlet channel (401) is connected to the inner cavity of the phase change generator cylinder (3) for connecting external equipment to fill liquid carbon dioxide.

3. The handheld transmitter based on supercritical carbon dioxide phase change as described in claim 2, characterized in that, The launching assembly also includes a conductive post (6), which is disposed through the connecting part. One end of the conductive post (6) is connected to the heating element (7), and the other end of the conductive post (6) is electrically connected to the trigger (10) through a wire.

4. The handheld transmitter based on supercritical carbon dioxide phase change drive according to claim 2, characterized in that, The pressure control diaphragm (8) has a cross-shaped groove on the side facing the air inlet plug (4), and the cross-shaped groove is used to guide the pressure control diaphragm (8) to break in a directional manner along the cross-shaped groove.

5. The handheld transmitter based on supercritical carbon dioxide phase change drive according to claim 2, characterized in that, The pressure control diaphragm (8) protrudes to one side of the launching tube (1).

6. The handheld transmitter based on supercritical carbon dioxide phase change drive according to claim 2, characterized in that, The launching assembly also includes a vent plug (5), which is threadedly connected to the phase change generating cylinder (3) at the end away from the air inlet plug (4); the side wall of the vent plug (5) is provided with a plurality of pressure relief holes (501) along the circumferential direction, and an annular gap is provided between the outer circumferential surface of the pressure relief hole (501) and the inner wall of the launching cylinder (1).

7. The handheld transmitter based on supercritical carbon dioxide phase change drive according to claim 2, characterized in that, The heating element (7) includes a resistance wire and an insulating shell. The resistance wire is encapsulated in the insulating shell, and the insulating shell is connected to the connecting part.

Images