Locking unit and fire-fighting device

Abstract

The application relates to a locking unit and a fire extinguishing device. The locking unit comprises a base, an end cover connected to one end of the base, a trigger member slidingly arranged in the base and capable of moving between a locking position and an unlocking position, a trigger cavity being formed between the trigger member and the end cover, and a locking member movably arranged on the base. When the fluid pressure in the trigger cavity increases, the trigger member moves to the locking position, the locking member contacts and abuts against the trigger member and is fixed for bearing a bearing unit carrying fire extinguishing bullets. When the fluid pressure in the trigger cavity decreases, the trigger member moves to the unlocking position, and the locking member can be separated from the trigger member and the bearing unit. Thus, the convenience of operation of the locking unit is improved.

Description

Technical Field

[0001] This application relates to the field of fire protection technology, and in particular to a locking unit and fire protection device. Background Technology

[0002] Firefighting equipment can launch fire extinguishing projectiles from a distance to effectively control fires. These projectiles are carried by a support unit. Before launch, the support unit is fixed inside the firefighting equipment by a locking unit. In traditional firefighting equipment, the locking unit unlocks slowly when a projectile needs to be launched, preventing instantaneous launch and ultimately affecting the ease of operation of the locking unit. Summary of the Invention

[0003] One technical problem addressed by this application is how to improve the ease of operation of the locking unit.

[0004] A locking unit, comprising:

[0005] Base;

[0006] End cap, connected to one end of the base;

[0007] A trigger element is slidably disposed within the base and movable between a locked position and an unlocked position; a trigger cavity is formed between the trigger element and the end cap; and

[0008] A locking element is movably mounted on the base;

[0009] When the fluid pressure in the trigger chamber increases, the trigger moves to the locking position, and the locking member contacts, abuts against, and is fixed to the carrying unit that carries the fire extinguishing bomb; when the fluid pressure in the trigger chamber decreases, the trigger moves to the unlocking position, and the locking member can disengage from the trigger and the carrying unit.

[0010] In one embodiment, the base has interconnected insertion holes and receiving holes. The insertion holes are used to insert the support unit, and the locking member is received in the receiving hole. The locking member is used to abut against the support unit radially along the receiving hole.

[0011] In one embodiment, there are multiple locking elements, which are spaced apart circumferentially along the insertion hole.

[0012] In one embodiment, the locking element comprises a spherical steel ball with a diameter of 1 mm to 100 mm.

[0013] In one embodiment, the trigger has a trigger surface that can abut against the locking member, the distance from the trigger surface to the socket increases from one end of the trigger surface near the end cap to the other end away from the end cap, and the length of the trigger surface is from 1 mm to 500 mm.

[0014] In one embodiment, the base includes an inner cylinder, an outer cylinder, a first connecting plate, and a second connecting plate. The outer cylinder surrounds the inner cylinder. The end cap is connected to one end of the outer cylinder. The first connecting plate is connected to the ends of the outer cylinder and the inner cylinder away from the end cap. The second connecting plate is connected to the end of the inner cylinder near the end cap. A sliding cavity is formed between the inner cylinder and the outer cylinder. The triggering element includes a first trigger portion and a second trigger portion. The first trigger portion is located between the end cap and the second connecting plate. The trigger cavity is formed between the first trigger portion and the end cap. The second trigger portion protrudes from the first trigger portion and slides in cooperation with the sliding cavity. The second trigger portion can abut against the locking element.

[0015] In one embodiment, the end cap has a mounting hole for fixed connection with the drive unit.

[0016] A fire-fighting device includes a housing, a drive unit, a support unit, and a locking unit as described above. The drive unit, the support unit, and the locking unit are all housed within the housing. The drive unit is fixedly connected to the end cap. The support unit is slidably disposed within the housing. In the locked position, the locking element abuts against the support unit. In the unlocked position, the locking element disengages from the support unit.

[0017] In one embodiment, the support unit has a recessed groove for engaging with the locking member.

[0018] In one embodiment, the bearing unit has an outer chamfer at one end near the base.

[0019] One technical advantage of one embodiment of this application is that when the fluid pressure in the trigger chamber increases, the trigger moves to the locking position, and the locking member contacts and abuts against the carrier unit; when the fluid pressure in the trigger chamber decreases, the trigger moves to the unlocking position, and the locking member can disengage from the trigger and the carrier unit. Therefore, by controlling the change in fluid pressure in the trigger chamber, the trigger moves between the locking and unlocking positions, thereby causing the locking member to abut against or disengage from the carrier unit. This allows for the rapid realization or release of the locking unit's constraint on the carrier unit, reducing the operation time of the locking unit during locking and unlocking processes, and thus improving the ease of operation of the locking unit. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of a fire-fighting device provided in one embodiment when the supporting unit is in its initial position.

[0021] Figure 2 for Figure 1 A schematic diagram of the planar cross-sectional structure of the drive mechanism in the fire-fighting device, where the first-stage piston and the second-stage piston are at their minimum contraction length.

[0022] Figure 3 for Figure 1 A schematic diagram of the planar cross-sectional structure of the drive mechanism in the fire-fighting device when the first-stage piston and the second-stage piston are at their maximum elongation.

[0023] Figure 4 for Figure 1 A schematic cross-sectional view of the load-bearing unit in the fire-fighting device.

[0024] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the fire-fighting device after it has been launched.

[0025] Figure 6 for Figure 1 A schematic cross-sectional view of the fire-fighting device when the drive unit and the load-bearing unit are reconnected after launch.

[0026] Figure 7 for Figure 1 A plan view of the locking unit in the fire-fighting device when the trigger is in the locked position.

[0027] Figure 8 for Figure 1 A plan view of the locking unit in the fire-fighting device when the trigger is in the unlocked position.

[0028] Reference numerals: Firefighting device 10, outer casing 100, casing body 110, cover 120, drive unit 200, hydraulic cylinder 210, cylinder barrel 230, first-stage piston 210, second-stage piston 220, flow guide channel 240, bearing unit 300, bearing part 310, bearing cavity 311, first sliding part 321, second sliding part 322, firing part 330, groove 331, outer chamfer 332, pressure air cavity 341, deceleration cavity 342. The components include: a deceleration unit 400, a deceleration body 410, a through hole 411, an annular groove 412, a locking unit 500, a base 510, an inner cylinder 511, an outer cylinder 512, a first connecting plate 513, a second connecting plate 514, a receiving hole 515, an insertion hole 516, a sliding cavity 517, an end cap 520, a mounting hole 521, a trigger element 530, a trigger cavity 533, a first trigger part 531, a second trigger part 532, a trigger curved surface 534, and a locking element 540. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, 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", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 , Figure 2 and Figure 3 This application provides a fire-fighting device 10 for long-range launching of fire extinguishing projectiles, thereby controlling the fire by extinguishing it. The fire-fighting device 10 includes a housing 100, a drive unit 200, a support unit 300, a deceleration unit 400, and a locking unit 500. The drive unit 200, support unit 300, deceleration unit 400, and locking unit 500 can all be housed within the housing 100. The drive unit 200 is connected to the locking unit 500, and the locking unit 500 is detachably connected to the support unit 300.

[0036] In some embodiments, the outer casing 100 includes a casing body 110 and a cover 120. The casing body 110 can be cylindrical, and the inner cavity of the casing body 110 is formed with openings at both ends. The cover 120 is fixedly connected to one end of the casing body 110, so that the cover 120 can seal one end of the inner cavity of the casing body 110. At this time, the other end of the inner cavity of the casing body 110 is still open.

[0037] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the drive unit 200 can be a hydraulic cylinder 210, which includes a cylinder barrel 230, a first-stage piston 210, and a second-stage piston 220. The cylinder barrel 230 is located in the inner cavity of the shell body 110, and one end of the cylinder barrel 230 can be fixedly connected to the cover body 120. The first-stage piston 210 is slidably disposed in the cylinder barrel 230, and the second-stage piston 220 is slidably disposed in the first-stage piston 210. Both the first-stage piston 210 and the second-stage piston 220 can slide and engage with the inner cavity of the shell body 110. The second-stage piston 220 is connected to the locking unit 500, allowing the second-stage piston 220 to drive the locking unit 500 to slide within the housing 100. When both the first-stage piston 210 and the second-stage piston 220 are extended to their maximum length, the second-stage piston 220 can connect with the locking unit 500. When the first-stage piston 210 and the second-stage piston 220 gradually retract to their shortest length, the second-stage piston 220 pulls the locking unit 500 to the position closest to the cover 120. Therefore, by setting the first-stage piston 210 and the second-stage piston 220, the stroke of the entire hydraulic cylinder 210 pushing the locking unit 500 within the housing 100 can be increased. In other embodiments, the drive unit 200 can also be a cylinder or a linear motor, etc.

[0038] See Figure 1 , Figure 2 and Figure 3In some embodiments, the deceleration unit 400 is disposed at the end of the shell body 110 away from the cover 120, and the support unit 300 is slidably disposed within the shell 100. The support unit 300 is used to support the fire extinguishing bomb. A pressure chamber 341 is formed between the support unit 300 and the end of the shell 100 away from the deceleration unit 400, that is, a pressure chamber 341 is formed between the support unit 300 and the cover 120. High-pressure gas can be introduced into the pressure chamber 341. The drive unit 200 and the locking unit 500 are located within the pressure chamber 341. The high-pressure gas in the pressure chamber 341 can drive the support unit 300 to move at high speed. It is understandable that when the locking unit 500 is connected to the bearing unit 300, the locking unit 500 will play a good restraining role on the bearing unit 300, effectively preventing the high-pressure gas in the pressure chamber 341 from driving the bearing unit 300 to move; when the locking unit 500 is released from the connection with the bearing unit 300, the locking unit 500 will lose its restraining role on the bearing unit 300, and at this time, the high-pressure gas in the pressure chamber 341 can drive the bearing unit 300 to move at high speed.

[0039] As the high-pressure gas in the pressure chamber 341 propels the carrier unit 300 toward the deceleration unit 400, the fire extinguishing projectile in the carrier unit 300 moves at high speed along with the carrier unit 300. When the carrier unit 300 comes into contact with the deceleration unit 400, the carrier unit 300 will decelerate and stop moving inside the outer shell 100. At this time, although the carrier unit 300 is still inside the outer shell 100, due to inertia, the fire extinguishing projectile will continue to move forward at high speed and detach from the carrier unit 300, thus realizing the launch of the fire extinguishing projectile from the carrier unit 300.

[0040] Therefore, after the fire extinguishing bomb is launched, the carrier unit 300 remains inside the outer casing 100. This allows the carrier unit 300 to be reused and loaded with the next fire extinguishing bomb for launch, thus preventing it from becoming a disposable product and avoiding the need for a new carrier unit 300 for each fire extinguishing bomb. This allows the carrier unit 300 to be reused multiple times, reducing the operating cost of the fire-fighting device 10. Furthermore, it effectively prevents the carrier unit 300, launched along with the fire extinguishing bomb, from falling and causing damage to personnel or property, thus avoiding secondary safety hazards and improving the safety of the fire-fighting device 10.

[0041] See Figure 1 , Figure 4 and Figure 5In some embodiments, the supporting unit 300 forms a supporting cavity 311, which is an open cavity with one end. The supporting cavity 311 is used to contain the fire extinguishing projectile, and the end opening of the supporting cavity 311 forms a launching port. The fire extinguishing projectile will detach from the supporting unit 300 from the launching port to achieve launch. The deceleration unit 400 has a through hole 411, which connects the inner cavity of the shell body 110 to the outside. During the deceleration process when the supporting unit 300 contacts the deceleration unit 400, the supporting unit 300 can pass through the through hole 411. The supporting unit 300 can be interference-fitted with the through hole 411. Therefore, the frictional resistance generated between the supporting unit 300 and the deceleration unit 400 causes the supporting unit 300 to stop moving, ensuring that the supporting unit 300 remains inside the shell 100. It can be understood that when the supporting unit 300 passes through the through hole 411, the fire extinguishing projectile can be launched from the fire-fighting device 10 through the launching port and the through hole 411.

[0042] See Figure 1 , Figure 4 and Figure 5 In some embodiments, the deceleration unit 400 includes a deceleration body 410 and a friction ring. The deceleration body 410 is fixedly connected to the outer shell 100. A through hole 411 is provided on the deceleration body 410, and the friction ring is provided on the deceleration body 410 and can be sleeved on the support unit 300. For example, an annular groove 412 is recessed on the inner wall surface of the through hole 411, and the friction ring can cooperate with the annular groove 412. When the high-speed moving support unit 300 enters the through hole 411, on the one hand, the support unit 300 forms an interference resistance with the through hole 411; on the other hand, since the friction ring is made of a material with a high coefficient of friction, the friction ring can have good flexibility. When the support unit 300 passes through the through hole 411, the friction ring will be sleeved on the support unit 300, so that the friction ring generates a large frictional resistance on the support unit 300. Therefore, under the combined action of the interference resistance and the frictional resistance, the support unit 300 quickly stops moving and stays inside the outer shell 100.

[0043] Therefore, through the aforementioned through-hole 411 and friction ring, the bearing unit 300 can be decelerated by frictional resistance, thus effectively avoiding hard collisions between the bearing unit 300 and the deceleration unit 400. This prevents damage to the bearing unit 300 and the deceleration unit 400 caused by hard collisions, thereby improving the safety and reliability of the fire-fighting device 10. It is understood that since the bearing unit 300 will not be damaged, it can be reused multiple times, further reducing the operating cost of the fire-fighting device 10.

[0044] In some embodiments, there are multiple friction rings arranged axially along the through hole 411. For example, multiple friction rings are arranged at intervals along the axial direction of the through hole 411, and the number of friction rings can be three to ten. By providing multiple friction rings, the friction force and deceleration effect of the deceleration unit 400 on the bearing unit 300 can be increased, ensuring that the bearing unit 300 stops moving quickly in a short time.

[0045] See Figure 1 , Figure 4 and Figure 5 In some embodiments, when the supporting unit 300 mates with the through hole 411, a deceleration air chamber 342 is formed between the supporting unit 300 and the deceleration unit 400. The deceleration air chamber 342 is isolated from and does not communicate with the pressure air chamber 341. It can be understood that the deceleration air chamber 342 is a closed structure. When the supporting unit 300 continues to move forward, the volume of the deceleration air chamber 342 is compressed, causing the air pressure inside the deceleration air chamber 342 to rise. Therefore, the gas inside the deceleration air chamber 342 will also have a good deceleration effect on the supporting unit 300, thus further improving the deceleration effect of the deceleration unit 400 on the supporting unit 300. It can be understood that, given the interference fit between the supporting unit 300 and the through hole 411, and the friction ring sleeved on the supporting unit 300, the friction ring will have a good sealing effect on the deceleration air chamber 342, preventing air leakage during the volume reduction process of the deceleration air chamber 342, thereby improving the deceleration effect of the deceleration air chamber 342 on the supporting unit 300.

[0046] See Figure 1 , Figure 4 and Figure 5In some embodiments, the support unit 300 includes a support portion 310, a first sliding portion 321, and a sealing element. The support portion 310 is used to support the fire extinguishing bomb, that is, the support cavity 311 is disposed on the support portion 310, and the support portion 310 can pass through the through hole 411 of the deceleration unit 400. The first sliding portion 321 is sleeved on the support portion 310, so that the first sliding portion 321 can protrude radially from the outer side of the support portion 310, and also so that the end of the first sliding portion 321 away from the support portion 310 can abut against the inner surface of the outer shell 100, thereby making the first sliding portion 321 slide in cooperation with the inner cavity of the shell body 110. The pressure chamber 341 is located between the first sliding part 321 and the outer shell 100. For example, the portion of the inner cavity of the shell body 110 located between the cover 120 and the first sliding part 321 belongs to the pressure chamber 341. A sealing element abuts against the first sliding part 321 and the outer shell 100, thereby sealing the pressure chamber 341. The sealing element can be an O-ring or the like. One or more sealing elements can be provided on the first sliding part 321 to ensure the sealing effect of the sealing element on the pressure chamber 341. Therefore, the first sliding part 321 can play a good guiding role in the sliding of the support unit 300, avoiding radial vibration of the support unit 300 during the high-pressure gas propulsion process. On the one hand, it improves the movement accuracy of the support unit 300 and the fire extinguishing projectile, thus improving the launching accuracy of the fire extinguishing projectile and ensuring that the launched fire extinguishing projectile accurately reaches the fire extinguishing position. On the other hand, it avoids energy loss of the support unit 300 due to vibration, thereby improving the utilization rate of the high-pressure gas energy of the support unit 300, which can reasonably improve the range of the fire extinguishing projectile and the operating cost of the fire-fighting device 10.

[0047] It is understandable that after the fire extinguishing projectile is fired, the gas in the pressure chamber 341 does not leak. Of course, as the volume of the pressure chamber 341 increases, the gas pressure in the pressure chamber 341 will decrease. At this time, the carrying unit 300 can be driven by the driving unit 200 and the locking unit 500 to move closer to the cover 120 to the initial position, so that the volume of the pressure chamber 341 decreases, and the pressure of the high-pressure gas in the pressure chamber 341 will return to the initial value, so that the high-pressure gas can drive the carrying unit 300, which is reloaded with the fire extinguishing projectile, to move at high speed. Therefore, the high-pressure gas in the pressure chamber 341 can be recycled, without the need to re-introduce high-pressure gas into the pressure chamber 341, thereby reducing the operating cost of the fire-fighting device 10 and eliminating the time wasted in introducing high-pressure gas, thereby increasing the number of fire extinguishing projectiles fired by the fire-fighting device 10 per unit time, achieving rapid fire suppression, and thus improving the fire extinguishing effect of the fire-fighting device 10.

[0048] In some embodiments, the distance from the first sliding portion 321 to the end of the bearing portion 310 near the deceleration unit 400 is 50cm to 150cm. For example, the specific value of this distance can be 50cm, 100cm, or 150cm, etc. This ensures that the pressure chamber 341 has a reasonable volume.

[0049] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the supporting unit 300 further includes a second sliding portion 322 and a wear-resistant component. The second sliding portion 322 is sleeved on the supporting portion 310, allowing it to protrude radially from the outer surface of the supporting portion 310. The end of the second sliding portion 322 away from the supporting portion 310 can also abut against the inner surface of the outer shell 100, thus enabling a sliding fit between the second sliding portion 322 and the inner cavity of the shell body 110. By providing the second sliding portion 322, both the second sliding portion 322 and the first sliding portion 321 can guide the supporting unit 300, further reducing radial vibration generated during high-speed movement. This improves the stability and movement accuracy of the supporting unit 300 during high-speed movement, thereby increasing the launching accuracy of the fire extinguishing projectile and the energy utilization rate of the high-pressure gas.

[0050] A wear-resistant ring abuts between the second sliding part 322 and the outer shell 100. The wear-resistant ring has excellent wear resistance, thus preventing damage to the second sliding part 322 and the outer shell 100 due to sliding, thereby improving the service life of the support unit 300. There may be one or more second sliding parts 322, which can be closer to the deceleration unit 400 than the first sliding part 321. It is understood that when there are multiple second sliding parts 322, the movement accuracy and stability of the support unit 300 are further improved, thereby further improving the firing accuracy of the fire extinguishing projectile and the energy utilization rate of the high-pressure gas. The ratio of the cross-sectional dimension of the support part 310 to the cross-sectional dimension of the first sliding part 321 is 0.5 to 0.9, for example, the specific value of this ratio can be 0.5, 0.6, or 0.9, thus ensuring that the support cavity 311 has a reasonable volume to accommodate a sufficiently large fire extinguishing projectile.

[0051] See Figure 6 , Figure 7 and Figure 8In some embodiments, the locking unit 500 includes a base 510, an end cap 520, a trigger 530, and a locking member 540. The end cap 520 is connected to the end of the base 510 near the cover body 120, and the end cap 520 is fixedly connected to the second-stage piston 220. This allows the drive unit 200 to drive the end cap 520 and the entire locking unit 500 to move. The trigger 530 is slidably disposed within the base 510, allowing the trigger 530 to move between a locked position and an unlocked position. A trigger cavity 533 is formed between the trigger 530 and the end cap 520. The locking member 540 is movably disposed on the base 510. When the fluid pressure in the trigger chamber 533 increases, the trigger element 530 moves to the locked position, and the locking element 540 contacts the trigger element 530, abutting against and fixing the carrying unit 300. This establishes a connection between the carrying unit 300 and the locking unit 500, meaning the locking unit 500 constrains the movement of the carrying unit 300, preventing the high-pressure gas in the pressure chamber 341 from driving the carrying unit 300. When the fluid pressure in the trigger chamber 533 decreases, the trigger element 530 moves to the unlocked position, and the locking element 540 disengages from both the trigger element 530 and the carrying unit 300. This releases the connection between the carrying unit 300 and the locking unit 500, thus releasing the constraint of the locking unit 500 on the carrying unit 300. This allows the high-pressure gas in the pressure chamber 341 to drive the carrying unit 300, thereby launching the fire extinguishing projectile.

[0052] See Figure 6 , Figure 7 and Figure 8 The trigger chamber 533 can be vented with pressurized gas. The cylinder 230, first-stage piston 210, and second-stage piston 220 of the hydraulic cylinder 210 are all equipped with flow channels 240. This can be understood as the center of the hydraulic cylinder 210 having a flow channel 240, which is interconnected with the trigger chamber 533. Thus, pressurized gas can be vented into the trigger chamber 533 through the flow channel 240. Under the action of the gas pressure, the trigger element 530 moves to the locked position, thereby fixing the bearing unit 300 and the locking unit 500 together. When the gas in the trigger chamber 533 is released to relieve pressure, the locking unit 500 releases its constraint on the bearing unit 300, allowing the bearing unit 300 to move away from the locking unit 500 under the action of the gas in the pressure chamber 341. At this time, the trigger element 530 moves to the unlocked position. Alternatively, liquid can be vented into the trigger chamber 533, and the liquid pressure will drive the trigger element 530 to move to the locked position. It is understood that the gas in the flow channel 240 can be generated by a device that introduces high-pressure gas into the pressure chamber 341. In this way, the same device can supply gas to both the pressure chamber 341 and the trigger chamber 533, thereby improving the ease of use of the fire-fighting device 10.

[0053] See Figure 6 , Figure 7 and Figure 8 Therefore, by controlling the change in fluid pressure in the trigger chamber 533, the trigger element 530 can move between the locked and unlocked positions, thereby causing the locking element 540 to abut or disengage from the bearing unit 300. This allows for the rapid realization or release of the constraint effect of the locking unit 500 on the bearing unit 300, reducing the operation time of the locking unit 500 during locking and unlocking, thus improving the ease of operation of the locking unit 500, ensuring the instantaneous launch of fire extinguishing bombs in a short time, increasing the number of fire extinguishing bombs launched by the fire-fighting device 10 per unit time, and achieving rapid extinguishing of fires, thereby improving the fire extinguishing effect of the fire-fighting device 10.

[0054] See Figure 6 , Figure 7 and Figure 8 In some embodiments, the base 510 is provided with an insertion hole 516 and a receiving hole 515, which are interconnected. The insertion hole 516 is used to insert the support unit 300. For example, the support unit 300 may also include a firing part 330, which is connected to one end of the support unit 310 near the cover 120. The firing part 330 can be inserted into the insertion hole 516. The locking member 540 is received in the receiving hole 515 and is used to abut against the firing part 330 of the support unit 300 along the radial direction of the receiving hole 515. When the locking member 540 abuts against the firing part 330, a large static friction force will be generated between the locking member 540 and the firing part 330. The pressure generated by the high-pressure gas in the pressure chamber 341 cannot overcome this static friction force to drive the bearing unit 300 to disengage from the locking unit 500. In this way, the connection between the bearing unit 300 and the locking unit 500 is realized, thereby improving the connection strength between the bearing unit 300 and the locking unit 500. This achieves the safe locking of the bearing unit 300 by the locking unit 500, preventing the pressure generated by the high-pressure gas in the pressure chamber 341 from driving the bearing unit 300 to disengage from the locking unit 500 before firing, thereby improving the safety of the fire-fighting device 10.

[0055] In some embodiments, there are multiple locking elements 540, which are spaced apart circumferentially along the insertion hole 516. Therefore, each locking element 540 can generate friction with the firing part 330 of the supporting unit 300, thereby reasonably increasing the friction between the entire locking unit 500 and the supporting unit 300, thus improving the security of the locking unit 500 locking the supporting unit 300. The locking element 540 includes spherical steel balls with a diameter of 1 mm to 100 mm, such as 1 mm, 50 mm, or 100 mm. By incorporating steel balls, the structural strength and wear resistance of the locking element 540 can be improved, preventing wear caused by excessive friction.

[0056] See Figure 6 , Figure 7 and Figure 8 In some embodiments, the trigger 530 has a trigger surface 534 that can abut against the locking member 540. The distance between the trigger surface 534 and the insertion hole 516 increases radially from the end of the trigger surface 534 near the end cap 520 to the end away from the end cap 520. The length of the trigger surface 534 is from 1 mm to 500 mm, and can be 1 mm, 200 mm, or 500 mm, etc. The trigger surface 534 can be a conical surface or an arc surface, etc. Therefore, driven by the fluid pressure in the trigger chamber 533, the trigger member 530 moves away from the end cap 520, and the end of the trigger surface 534 with the smallest distance from the insertion hole 516 gradually approaches the locking member 540. This causes the distance from the point where the trigger surface 534 abuts against the locking member 540 to the insertion hole 516 to gradually decrease, thereby increasing the contact force between the trigger surface 534 and the locking member 540. This increases the static friction between the locking member 540 and the firing part 330. When the trigger member 530 moves to the locked position, the static friction between the locking member 540 and the firing part 330 is large enough that the pressure generated by the high-pressure gas in the pressure chamber 341 cannot overcome the static friction to drive the bearing unit 300 to disengage from the locking unit 500. It is understandable that when the trigger chamber 533 is depressurized, the pressure of the trigger 530 on the locking member 540 disappears instantly, thereby causing the static friction between the locking member 540 and the firing part 330 to disappear instantly. At this time, the pressure generated by the high-pressure gas in the pressure chamber 341 drives the bearing unit 300 to disengage from the locking unit 500, and the locking member 540 will also drive the trigger 530 to move to the unlocked position. The locking member 540 effectively interferes with the movement of the firing part 330 and the entire bearing unit 300, ensuring the smooth launch of the fire extinguishing projectile.

[0057] See Figure 6 , Figure 7 and Figure 8In some embodiments, the base 510 includes an inner cylinder 511, an outer cylinder 512, a first connecting plate 513, and a second connecting plate 514. The outer cylinder 512 surrounds the inner cylinder 511, and the inner cylinder 511 and the second connecting plate 514 form an insertion hole 516. A receiving hole 515 is provided on the inner cylinder 511. An end cap 520 is connected to the end of the outer cylinder 512 near the cap 120. The first connecting plate 513 is connected to the ends of the outer cylinder 512 and the inner cylinder 511 away from the end cap 520. The second connecting plate 514 is connected to the end of the inner cylinder 511 near the end cap 520. A sliding cavity 517 is formed between the inner cylinder 511 and the outer cylinder 512. The trigger 530 includes a first trigger portion 531 and a second trigger portion 530. The trigger part 532 has a first trigger part 531 located between the end cover 520 and the second connecting plate 514, forming a trigger cavity 533 between the first trigger part 531 and the end cover 520. A second trigger part 532 protrudes from the first trigger part 531 and slides in cooperation with the sliding cavity 517. The second trigger part 532 can abut against the locking member 540. The aforementioned trigger surface 534 is provided on the second trigger part 532. The sliding cavity 517 effectively limits the sliding of the second trigger part 532, thereby improving the movement accuracy of the trigger member 530. Alternatively, a sealing ring can be fitted onto the second trigger part 532 to effectively seal the trigger cavity 533, thereby increasing the driving force of the gas in the trigger cavity 533 on the trigger member 530.

[0058] In some embodiments, the end cap 520 is provided with a mounting hole 521 for fixed connection with the drive unit 200. For example, the second-stage piston 220 of the drive unit 200 can be inserted into the mounting hole 521, so that the mounting hole 521 plays a good limiting role for the second-stage piston 220. This can reasonably improve the connection strength between the second-stage piston 220 and the end cap 520 and the entire locking unit 500.

[0059] See Figure 6 , Figure 7 and Figure 8 In some embodiments, a recessed groove 331 is formed on the firing part 330 of the support unit 300, which is used to cooperate with the locking member 540. By providing the groove 331, the locking member 540, which cooperates with the groove 331, can apply a force to the firing part 330 along the axial direction of the insertion hole 516, thereby further improving the security of the locking unit 500 locking the support unit 300. An outer chamfer 332 is provided on the end of the firing part 330 of the support unit 300 near the base 510. By providing the outer chamfer 332, the outer chamfer 332 can play a good guiding role, thereby reducing interference and allowing the firing part 330 to be smoothly inserted into the insertion hole 516, reducing the connection time between the locking unit 500 and the support unit 300.

[0060] See Figure 1In the ready-to-launch state, both the first-stage piston 210 and the second-stage piston 220 are in their minimum extension / retraction length state. At this time, there is a certain pressure of fluid in the trigger chamber 533, the trigger element 530 is in the locked position, the locking unit 500 is connected to the supporting unit 300, and the supporting unit 300 is in the initial position. (See reference...) Figure 5 When it is necessary to launch a fire extinguishing bomb, the trigger chamber 533 is depressurized. At this time, the high-pressure gas in the pressure chamber 341 will drive the carrier unit 300 and the fire extinguishing bomb to move at high speed. The carrier unit 300 will pass through the deceleration unit 400 and stop moving. The fire extinguishing bomb will be launched from the carrier unit 300.

[0061] See Figure 6 After all the fire extinguishing shells have been fired, a new fire extinguishing shell can be loaded into the carrying unit 300 located in the deceleration unit 400. This causes the first-stage piston 210 and the second-stage piston 220 to extend to their maximum length, allowing the firing part 330 of the carrying unit 300 to be inserted into the insertion hole 516 of the base 510. At this point, fluid is re-introduced into the trigger chamber 533, creating pressure within it. This causes the trigger element 530 to move to the locking position, reconnecting the locking unit 500 to the carrying unit 300. (See reference...) Figure 1 Then, the first-stage piston 210 and the second-stage piston 220 are both in their minimum contracted length state, allowing the carrying unit 300, which carries a new fire extinguishing bomb, to return to its initial position, thus facilitating the launch of a new fire extinguishing bomb. Therefore, through the above operating mode, the fire-fighting device can achieve continuous launch of multiple fire extinguishing bombs.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A locking unit, characterized in that, include: Base; An end cap is connected to one end of the base; A trigger element is slidably disposed within the base and is capable of moving between a locked position and an unlocked position; a trigger cavity is formed between the trigger element and the end cap. and A locking element is movably mounted on the base; When the fluid pressure in the trigger chamber increases, the trigger moves to the locking position, and the locking member contacts, abuts against, and is fixed to the carrying unit that carries the fire extinguishing bomb; when the fluid pressure in the trigger chamber decreases, the trigger moves to the unlocking position, and the locking member can disengage from the trigger and the carrying unit.

2. The locking unit according to claim 1, characterized in that, The base has interconnected insertion holes and receiving holes. The insertion holes are used to insert the bearing unit, and the locking member is received in the receiving hole. The locking member is used to abut against the bearing unit along the radial direction of the receiving hole.

3. The locking unit according to claim 2, characterized in that, The number of locking elements is multiple, and the multiple locking elements are arranged at intervals along the circumference of the insertion hole.

4. The locking unit according to claim 2, characterized in that, The locking element includes a spherical steel ball with a diameter of 1 mm to 100 mm.

5. The locking unit according to claim 2, characterized in that, The trigger has a trigger surface that can abut against the locking member. The distance from the trigger surface to the insertion hole increases from the end of the trigger surface near the end cap to the end away from the end cap. The length of the trigger surface is 1 mm to 500 mm.

6. The locking unit according to claim 1, characterized in that, The base includes an inner cylinder, an outer cylinder, a first connecting plate, and a second connecting plate. The outer cylinder surrounds the inner cylinder. The end cap is connected to one end of the outer cylinder. The first connecting plate is connected to the ends of the outer cylinder and the inner cylinder away from the end cap. The second connecting plate is connected to the end of the inner cylinder near the end cap. A sliding cavity is formed between the inner cylinder and the outer cylinder. The triggering element includes a first triggering part and a second triggering part. The first triggering part is located between the end cap and the second connecting plate. The triggering cavity is formed between the first triggering part and the end cap. The second triggering part protrudes from the first triggering part and slides in cooperation with the sliding cavity. The second triggering part can abut against the locking element.

7. The locking unit according to claim 1, characterized in that, The end cap has a mounting hole for fixed connection with the drive unit.

8. A fire-fighting device, characterized in that, The device includes a housing, a drive unit, a support unit, and a locking unit as described in any one of claims 1 to 7. The drive unit, the support unit, and the locking unit are all housed within the housing. The drive unit is fixedly connected to the end cap. The support unit is slidably disposed within the housing. In the locked position, the locking member abuts against the support unit. In the unlocked position, the locking member disengages from the support unit.

9. The fire-fighting device according to claim 8, characterized in that, The bearing unit has a recessed groove for engaging with the locking member.

10. The fire-fighting device according to claim 8, characterized in that, The bearing unit has an outer chamfer at one end near the base.

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