Safety device for fire extinguishing bomb

Abstract

The utility model discloses a safety device for a fire extinguishing bomb, which comprises a bomb body, an ignition assembly is arranged on the bomb body, the ignition assembly is connected with a safety mechanism, the safety mechanism comprises a trigger assembly, an electronic switch, a timing module and a power supply module, and the power supply module is respectively connected with the trigger assembly, the electronic switch, the timing module and the ignition assembly. The trigger module is connected with the timing module, the electronic switch is connected with the ignition assembly, and the electronic switch keeps a normally open state when not receiving a level signal; the trigger assembly is used for disconnection and connection, the power module does not supply power to the timing module during disconnection, and the power module supplies power to the timing module during connection; the timing module sends a level signal to the electronic switch to switch on the electronic switch when being powered on. According to the utility model, the safety and reliability are improved, the operation is simple and convenient, and false triggering is not easy to occur.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing bomb technology, specifically a safety device for fire extinguishing bombs. Background Technology

[0002] With the development of fire extinguishing technology, the emergence of fire extinguishing grenades has effectively compensated for the shortcomings of handheld fire extinguishers, such as short working distance and inherent danger. Currently, fire extinguishing grenades on the market are mainly divided into hand-thrown fire extinguishing grenades and projectile fire extinguishing grenades, based on their launching method. Hand-thrown fire extinguishing grenades are thrown similarly to hand grenades, and are mainly equipped with pull rings and safety pins, as well as those with superconducting thermal wires. At a fire scene, firefighters manually throw the fire extinguishing grenades into the fire, causing the extinguishing agent to explode and instantly impact the flame surface, effectively controlling the fire in a short time. Its advantages include simple manufacturing process, convenient operation, low cost, and good fire extinguishing performance. However, it also has disadvantages. These fire extinguishing grenades generally need to be thrown within a seven-second delay; otherwise, there is a risk of injury to the thrower or companions, posing a danger.

[0003] Fire extinguishing bombs need to be equipped with detonation switches. Currently, most of the switches that trigger the explosion of fire extinguishing bombs are ultrasonic height measurement triggers or laser triggers. These require many expensive components, are relatively complex, costly, have poor reliability, and are prone to being accidentally triggered, resulting in poor safety. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention provides a safety device for fire extinguishing bombs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A safety device for a fire extinguishing grenade includes a grenade body with an ignition assembly connected to a safety mechanism. The safety mechanism includes a triggering component, an electronic switch, a timing module, and a power supply module. The power supply module is connected to the triggering component, the electronic switch, the timing module, and the ignition assembly. The triggering module is connected to the timing module, and the electronic switch is connected to the ignition assembly.

[0007] The electronic switch remains open when it does not receive a voltage signal.

[0008] The trigger component is used to disconnect and connect. When disconnected, the power module does not supply power to the timing module, and when connected, the power module supplies power to the timing module.

[0009] When the timing module is powered on, it sends a level signal to the electronic switch to turn it on.

[0010] As a further improvement, the triggering component includes a first switch and a limiting member. One end of the first switch is connected to the power module and the other end is connected to the timing module. The limiting member is connected to the first switch and keeps the first switch in an open state. When the limiting member is subjected to an external force, it causes the first switch to change from an open state to a closed state.

[0011] As a further improvement, the limiting member includes a stop block and a first abutment foot. The first abutment foot is connected to the stop block. The first abutment foot is inserted into the first switch to open the first switch. Pulling the stop block outward causes the first abutment foot to disengage from the first switch and closes the first switch to conduct electricity.

[0012] As a further improvement, the stop is provided with a connecting rope.

[0013] As a further improvement, the first switch includes a left end, a right end, and a conductive plate. The left end is connected to the battery, the right end is connected to the timing module, one end of the conductive plate is connected to the left end, the conductive plate is connected to the right end and conducts when it is not pressed by the first contact foot, and the conductive plate is disconnected from the right end when it is pressed by the first contact foot.

[0014] As a further improvement, the conductive sheet is an elastic sheet; or the conductive sheet is a non-elastic sheet, and a spring is connected to the conductive sheet, the spring exerting a tensile force or a pushing force on the conductive sheet, so that the conductive sheet is closed and connected to the right end without being subjected to external force.

[0015] As a further improvement, a second switch is provided between the power module and the electronic switch. One end of the second switch is connected to the power module, and the other end of the second switch is connected to the electronic switch. A second contact foot is provided on the stop block. The second contact foot is inserted into the second switch to open the second switch. Pulling the stop block outward causes the second contact foot to disengage from the second switch and closes the second switch to conduct electricity.

[0016] As a further improvement, the electronic switch is a relay, a MOS switch, or a switching circuit.

[0017] As a further improvement, the power module is a storage battery.

[0018] As a further improvement, the ignition assembly is provided with a plug-in port, and the safety mechanism is provided with a plug-in terminal that matches the plug-in port.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] Pulling the stop block triggers the switch to conduct, which in turn activates the ignition component and detonates the fire extinguishing bomb. This method offers higher safety and can be implemented using only common electronic components, reducing costs. It can also be used in conjunction with drones to drop and detonate the fire extinguishing bomb. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of Embodiment 2 of the present invention;

[0022] Figure 2 This is a schematic diagram of Embodiment 3 of the present invention;

[0023] Figure 3 This is a structural schematic diagram of one embodiment of the intermediate block of this utility model. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0027] Example 1

[0028] like Figure 1As shown, a safety device for fire extinguishing projectiles includes a projectile body with an ignition assembly 1 connected to a safety mechanism. The safety mechanism includes a triggering component, an electronic switch, a timing module, and a power supply module. The power supply module is connected to the triggering component, electronic switch, timing module, and ignition assembly. The triggering module is connected to the timing module, and the electronic switch is connected to the ignition assembly. The projectile body is a fire extinguishing projectile, not limited to a specific model. The ignition assembly is a known design for fire extinguishing projectiles; triggering the ignition assembly detonates the projectile body. The power supply module can use a rechargeable battery, and the required voltage does not need to be excessively high; therefore, a battery with the appropriate voltage can be flexibly selected according to actual needs. The timing module controls the opening and closing of the electronic switch, providing a delay signal to ensure that the fire extinguishing projectile detonates only after a set delay following its deployment, thus improving safety.

[0029] The electronic switch remains normally open when it does not receive a voltage signal from the timing module. The trigger component is used for opening and closing; when open, the power module does not supply power to the timing module, and when closed, the power module supplies power to the timing module. The timing module only begins operation after receiving power. After the timing module is powered on, it sends a voltage signal to the electronic switch to turn it on, and current flows through the electronic switch to the ignition assembly.

[0030] The electronic switch is a relay, a MOS switch, or a switching circuit, used to turn on the electronic switch when the countdown ends, thereby connecting the positive terminal of the battery and the positive terminal of the ignition device, and triggering the detonation of the fire extinguishing bomb.

[0031] In addition, the connection between the safety mechanism and the ignition assembly can be achieved either through a wired connection or by having a plug-in port on the ignition assembly and a matching plug-in terminal on the safety mechanism. This plug-in port enhances the ease of connection, especially when the user is out and about, allowing them to simply insert the safety mechanism into the ignition assembly of the fire extinguishing grenade when needed.

[0032] For the triggering component, there are two preferred implementation methods.

[0033] Example 2

[0034] like Figure 1As shown, the triggering component includes a first switch 2 and a limiting member. One end of the first switch 2 is connected to the power module, and the other end is connected to the timing module 1. The limiting member is connected to the first switch 2 and keeps the first switch 2 in an open state. When the limiting member is subjected to an external force, the first switch changes from an open state to a closed state. The limiting member includes a stop block 3 and a first contact foot 4. The first contact foot 4 is connected to the stop block 3. The first contact foot 4 is inserted into the first switch 2 to open the first switch 2. Pulling the stop block 3 outward causes the first contact foot 4 to disengage from the first switch 2 and close the first switch 2. The stop block 3 is provided with a connecting rope 5, which restricts the stop block. The connecting rope can be fixed to an external device so that the first contact foot disengages from the first switch. The stop block and the first contact foot are integrally formed and made of insulating material.

[0035] In order to keep the first abutment foot pressed against the first switch without the need for external force, an insertion cavity of a corresponding size can be set in the first switch so that the first abutment foot and the insertion cavity of the first switch form a certain frictional fit to maintain the pressing force.

[0036] The first switch includes a left end, a right end, and a conductive plate. The left end is connected to the battery, the right end is connected to the timing module, and one end of the conductive plate is connected to the left end. When the conductive plate is not pressed by the first contact foot, it is connected to the right end and conducts electricity. When the conductive plate is pressed by the first contact foot, it is disconnected from the right end.

[0037] The conductive sheet is an elastic sheet, designed so that when not subjected to external force, the conductive sheet closes and connects to the right end, thus turning on the first switch.

[0038] Alternatively, the conductive sheet can be a non-elastic sheet with a spring connected to it. The spring exerts a tensile or pushing force on the conductive sheet, causing it to close and connect with the right end when not subjected to external force. The spring needs to be insulated to prevent the first switch from closing due to the spring's connection. The spring's position can be flexibly set. For example, one end of the spring can be placed at the right end, and the other end connected to the conductive sheet. In this case, the spring itself is in a stretched state, and the conductive sheet closes and connects with the right end under the tensile force of the spring when not pressed by the first contact foot. Alternatively, the spring can be placed outside the right end, acting as a pusher on the conductive sheet. In this case, the spring is positioned towards the right end. The spring is in a compressed state. When the conductive sheet disengages from the first contact foot, the compressed spring generates a restoring force, pushing the conductive sheet towards the right end.

[0039] Initially, the electronic switch is in the open state. One end of the power module is directly connected to the electronic switch, but because the electronic switch is open, current cannot be delivered to the ignition assembly. The first contact pin of the stop block is inserted into the first switch, between the left and right ends, pushing the conductive plate open so that it is not connected to the right end. At this time, the first switch is in the open state. The timing module is only connected to one end of the power module. Therefore, the power module does not supply power to the timing module. The opening and closing of the electronic switch is controlled by the timing module. At this time, the timing module has no power supply and therefore does not work, and cannot send control signals to the electronic switch. When a fire extinguishing bomb needs to be thrown, the stop block is pulled outward via the connecting rope. The first contact foot disengages from the first switch, and the conductive plate of the first switch is no longer subjected to the resisting force. The conductive plate closes, causing the first switch to switch from open to on. The power module supplies power to the timing module to make it run. The timing module sends a control signal after a set delay from power-on to turn on the electronic switch. At this time, the ignition component and the power module form a closed loop. The current at one end of the power module is transmitted to the ignition component through the electronic switch, detonating the fire extinguishing bomb.

[0040] Example 3

[0041] like Figure 2 As shown, a second switch 6 is provided between the power module and the electronic switch. One end of the second switch 6 is connected to the power module, and the other end is connected to the electronic switch. A second contact foot 7 is provided on the stop block 3. The second contact foot 7 is inserted into the second switch 6 to open the second switch 6. Pulling the stop block outward causes the second contact foot to disengage from the second switch, closing and connecting the second switch. The structure of the second switch is the same as that of the first switch. The stop block simultaneously engages both the first and second switches to achieve both on and off states; that is, the first and second switches can simultaneously remain either open or closed.

[0042] In Embodiment 2, by adding a second switch, the electronic switch is not connected to the power module when the second switch is off, whereas in Embodiment 1, the electronic switch remains connected to the power module. Therefore, adding a second switch can improve reliability and safety.

[0043] The difference between having a second switch and not having a second switch is:

[0044] In Example 1, when no second switch is provided, if the timing module is suddenly powered on due to external interference or unexpected malfunction, the electronic switch is directly connected to the power module. Therefore, after the set delay time, even if the stop block is not pulled open (i.e., the first switch remains open), the timing module will send a control signal to the timing module after the set running time, the electronic switch will be turned on, and then the fire extinguishing bomb will be detonated through the ignition component.

[0045] In Example 2, a second switch is provided. When the timing module is suddenly powered on due to external interference or unexpected malfunction, and the stop block is not pulled open, when the timing module sends a control signal to the electronic switch, the electronic switch will not be powered on and will not conduct, so the fire extinguishing bomb will not be detonated, thus improving safety.

[0046] The following example illustrates how to use a drone to drop fire extinguishing bombs. It is based on the simultaneous setting of the first and second switches.

[0047] In the initial state, the first and second switches are in the open state due to the restriction of the stop block, and the electronic switch is in the open state.

[0048] The connecting rope on the block is connected to the corresponding position of the drone. The delay time for the timing module to send a control signal after being powered on is set according to various factors such as the environment, wind force, air pressure, temperature, and humidity of the throwing site.

[0049] like Figure 3 As shown, to facilitate the assembly of the connecting rope, a hook 8 can be set on the block, and one end of the connecting rope 5 can be passed through the hook 8 and tied tightly.

[0050] When needed, the fire extinguishing grenade is thrown. The stop block, restrained by the connecting rope, detaches from the first and second switches and is not thrown outwards with the grenade. The first and second switches switch from the open to the on state. Although the electronic switch is connected to a power source, it remains open unless the timing module sends a control signal. The power module, the first switch, and the timing module form a closed loop. The power module supplies power to the timing module, which, after a set delay according to preset conditions, sends a control signal to the electronic switch, turning it on. At this point, the ignition assembly, the electronic switch, the second switch, and the power module form a closed loop. The ignition assembly, when energized, triggers, detonating the fire extinguishing grenade. The desired detonation height and time can be adjusted by setting the delay time of the timing module, ensuring precise control and convenient operation.

[0051] It should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety device for fire extinguishing projectiles, comprising a projectile body, wherein an ignition assembly is provided on the projectile body, characterized in that, The ignition assembly is connected to a safety mechanism, which includes a trigger assembly, an electronic switch, a timing module, and a power module. The power module is connected to the trigger assembly, the electronic switch, the timing module, and the ignition assembly. The trigger module is connected to the timing module, and the electronic switch is connected to the ignition assembly. The electronic switch remains open when it does not receive a voltage signal. The trigger component is used to disconnect and connect. When disconnected, the power module does not supply power to the timing module, and when connected, the power module supplies power to the timing module. When the timing module is powered on, it sends a level signal to the electronic switch to turn it on.

2. The safety device for fire extinguishing bombs according to claim 1, characterized in that, The triggering component includes a first switch and a limiting member. One end of the first switch is connected to the power module and the other end is connected to the timing module. The limiting member is connected to the first switch and keeps the first switch in an open state. When the limiting member is subjected to an external force, it causes the first switch to change from an open state to a closed state.

3. The safety device for fire extinguishing bombs according to claim 2, characterized in that, The limiting component includes a stop block and a first abutment foot. The first abutment foot is connected to the stop block. The first abutment foot is inserted into the first switch to open the first switch. Pulling the stop block outward causes the first abutment foot to disengage from the first switch and closes the first switch to conduct electricity.

4. The safety device for fire extinguishing bombs according to claim 3, characterized in that, The stop block is equipped with a connecting rope.

5. The safety device for fire extinguishing bombs according to claim 4, characterized in that, The first switch includes a left end, a right end, and a conductive plate. The left end is connected to the battery, the right end is connected to the timing module, and one end of the conductive plate is connected to the left end. When the conductive plate is not pressed by the first contact foot, it is connected to the right end and conducts electricity. When the conductive plate is pressed by the first contact foot, it is disconnected from the right end.

6. The safety device for fire extinguishing bombs according to claim 5, characterized in that, The conductive sheet is an elastic sheet; or the conductive sheet is a non-elastic sheet with a spring connected to it. The spring exerts a tensile or pushing force on the conductive sheet, so that the conductive sheet is closed and connected to the right end without being subjected to external force.

7. The safety device for fire extinguishing bombs according to claim 3, characterized in that, A second switch is provided between the power module and the electronic switch. One end of the second switch is connected to the power module, and the other end of the second switch is connected to the electronic switch. A second contact foot is provided on the stop block. The second contact foot is inserted into the second switch to open the second switch. Pulling the stop block outward will cause the second contact foot to disengage from the second switch and close the second switch to conduct electricity.

8. The safety device for fire extinguishing bombs according to claim 1, characterized in that, The electronic switch is a relay, a MOS switch, or a switching circuit.

9. The safety device for fire extinguishing bombs according to claim 1, characterized in that, The power module is a storage battery.

10. The safety device for fire extinguishing bombs according to claim 1, characterized in that, The ignition assembly is provided with a plug-in port, and the safety mechanism is provided with a plug-in terminal that matches the plug-in port.

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