Movable heptafluoropropane foam fire extinguishing device

Abstract

The invention relates to a movable heptafluoropropane foam fire extinguishing device which comprises a cart, a foam storage tank, a foam mixer and a heptafluoropropane mixer are arranged in the cart, a water inlet, a foam inlet and a foam liquid outlet are formed in the foam mixer, the water inlet can be detachably connected with a fire hose, and the foam liquid outlet can be detachably connected with a water outlet. The foam inlet is connected with the foam storage tank, the heptafluoropropane mixer is provided with a heptafluoropropane inlet, a foam liquid inlet and a mixed liquid outlet, the foam liquid inlet is connected with the foam liquid outlet, a placement cabinet is embedded in the cart, a heptafluoropropane gas storage bottle is detachably arranged in the placement cabinet, and the heptafluoropropane gas storage bottle is connected with the heptafluoropropane gas storage tank. The heptafluoropropane inlet is connected with a heptafluoropropane gas storage bottle, and the placement cabinet can slide between a first position and a second position. The heptafluoropropane foam fire extinguishing system is carried on the cart and can move according to the diffusion condition of a fire disaster, fire fighting is convenient, the heptafluoropropane gas storage bottle can be replaced by pulling out the containing cabinet, and use is convenient.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing technology, specifically to a mobile heptafluoropropane foam fire extinguishing device. Background Technology

[0002] With the continuous progress of society and the continuous development of industry, both domestic and foreign countries have paid more and more attention to environmental protection, resulting in the introduction of many new products that have no impact on the environment. In terms of fire extinguishing agents, the heptafluoropropane foam proportioning mixing device fire extinguishing system is one of them.

[0003] Because heptafluoropropane is usually stored in sealed containers and requires high-pressure nitrogen to propel it, the delivery distance is limited. Therefore, heptafluoropropane foam fire extinguishing systems typically need to be installed in fixed locations. In use, heptafluoropropane and foam extinguishing agent are mixed and then delivered to the fire area via pipelines to control the fire.

[0004] With the increasing scale of industry, the diversification of product types, and the complexity of processes, higher demands are being placed on fire safety. In particularly hazardous locations such as petrochemical and chemical warehouses, fires spread rapidly, capable of engulfing most of the production and storage areas in a short time, and are prone to explosions at any moment, causing the fire to spread further to the surrounding areas. Therefore, designing a mobile foam fire extinguishing system is of paramount importance.

[0005] In heptafluoropropane foam fire suppression systems, heptafluoropropane is typically released all at once within a very short time, while the foam needs to be continuously sprayed to cover the surface of the burning material, isolating it from oxygen and cooling it down. Therefore, in heptafluoropropane foam fire suppression systems, the foam storage capacity is usually greater than the heptafluoropropane storage capacity. Once the heptafluoropropane cylinder is depleted, it needs to be replaced. However, existing cylinders are usually located inside the trolley, making replacement difficult. Summary of the Invention

[0006] The technical problem this invention aims to solve is to address the above-mentioned shortcomings by providing a mobile heptafluoropropane foam fire extinguishing device. This heptafluoropropane foam fire extinguishing system is mounted on a trolley, allowing it to be moved according to the spread of the fire, facilitating firefighting. Furthermore, the heptafluoropropane storage cylinder can be replaced by pulling out a storage cabinet, making it convenient to use.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: A mobile heptafluoropropane foam fire extinguishing device includes: a trolley, which houses a foam storage tank, a foam mixer, and a heptafluoropropane mixer. The foam mixer has a water inlet, a foam inlet, and a foam liquid outlet. The water inlet is detachably connected to a fire hose. The foam inlet is connected to the foam storage tank. The heptafluoropropane mixer has a heptafluoropropane inlet, a foam liquid inlet, and a mixed liquid outlet. The foam liquid inlet and foam liquid outlet are connected. A storage cabinet is embedded in the trolley. A heptafluoropropane gas cylinder is detachably installed inside the storage cabinet. The heptafluoropropane inlet is connected to the heptafluoropropane gas cylinder via a curved high-pressure hose. The storage cabinet can slide between a first position and a second position. When the storage cabinet is in the first position, it is located inside the trolley and locked in a closed state. When the storage cabinet is in the second position, a portion of the storage cabinet is outside the trolley, and the storage cabinet can be opened automatically or manually.

[0008] Furthermore, a control valve assembly is provided between the heptafluoropropane storage cylinder and the heptafluoropropane inlet. The control valve assembly includes a first pressure monitoring unit, a regulating valve, a second pressure monitoring unit, a filter, a first control valve, and a check valve arranged sequentially along the conveying direction.

[0009] Furthermore, an inlet valve is provided at the inlet, a second control valve is provided between the foam liquid outlet and the heptafluoropropane mixer, and a third control valve is provided at the outlet of the mixture.

[0010] Furthermore, the placement cabinet includes an upright plate, a traction frame, a first cabinet door, and a second cabinet door. The trolley is provided with a placement slot, and the upright plate is slidably disposed within the placement slot. The upright plate is provided with a fixing component for limiting the horizontal position of the heptafluoropropane storage cylinder. The bottom of the upright plate is provided with a support base for supporting the heptafluoropropane storage cylinder, and the support base contacts a portion of the lower surface of the heptafluoropropane storage cylinder. The traction frame is hinged to the middle of the top and bottom ends of the upright plate. The first cabinet door and the second cabinet door are respectively hinged to both sides of the upright plate. In the first position, the first cabinet door and the second cabinet door are located within the placement slot, and the placement slot can restrict the opening of the first cabinet door and the second cabinet door. In the second position, the first cabinet door and the second cabinet door are located outside the placement slot.

[0011] Furthermore, the bottom and both sides of the upright plate are provided with slide rail mechanisms. The slide rail mechanism includes a first slider, a first guide rail and a second guide rail. The first slider is hinged to the upright plate and can rotate in a vertical plane. The first slider is slidably disposed on the first guide rail and the first guide rail is slidably disposed on the second guide rail. The first guide rail can slide along the second guide rail so that part of the first guide rail moves to the outside of the trolley.

[0012] Furthermore, the fixing component includes a fixing base, a first hoop, a second hoop, and a connecting component. The fixing base is fixedly installed inside the placement cabinet. The first hoop and the second hoop are both hinged to the fixing base. The ends of the first hoop and the second hoop away from the fixing base are detachably connected through the connecting component.

[0013] Furthermore, the fixed base includes a support portion, a contact portion, a damper, and a first elastic element. Two support portions are fixedly disposed on the upright plate. The two ends of the contact portion are respectively fixedly connected to the ends of the two support portions away from the upright plate. The first elastic element and the damper are both fixedly disposed on the upright plate and located between the two support portions. The telescopic end of the damper is fixedly connected to the contact portion, and the first elastic element abuts against the contact portion.

[0014] Furthermore, the cabinet is equipped with a self-opening component, which includes a hinge seat, a connecting rod, a second slider, and a second elastic element. Both the first and second cabinet doors are equipped with hinge seats. Two second sliders are slidably mounted on the upright plate. The second sliders are connected to the adjacent hinge seats via a connecting rod. The two ends of the connecting rod are respectively hinged to the second sliders and the hinge seats. The second elastic element is used to provide a spring force that moves the two second sliders away from each other.

[0015] Furthermore, the self-opening assembly also includes a third elastic element, one end of which is hinged to the end of the connecting rod near the hinge seat, and the other end of which is hinged to the upright plate.

[0016] Furthermore, the traction frame is provided with a locking assembly, which includes a handle, a fourth elastic element, a connecting rod, and a locking tongue. The handle is slidably disposed on the outside of the traction frame and can slide up and down. The connecting rod is vertically disposed on the inside of the traction frame, and the top of the connecting rod is fixedly connected to the handle. The locking tongue is disposed at the bottom of the connecting rod and can pass through the traction frame. The fourth elastic element is used to provide an elastic force to move the handle downward. The trolley is provided with a groove that cooperates with the locking tongue.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has at least one of the following advantages: (1) The heptafluoropropane foam fire extinguishing system of this application is mounted on a trolley, which can be moved according to the fire spread and extinguished immediately, so as to control the fire in the early stage of fire development. (2) After connecting the fire water supply pipe, the foam in the foam storage tank is pressed out by inputting fire water into the foam storage tank and mixed with fire water to obtain foam liquid; the heptafluoropropane in the heptafluoropropane storage cylinder is input into the heptafluoropropane mixer through a high-pressure hose to mix with the foam liquid, thereby outputting heptafluoropropane foam mixture. (3) This application designs a storage cabinet structure. After the heptafluoropropane storage cylinder is used, the cabinet door can be opened by pulling out the storage cabinet (even if the storage cabinet is moved from the first position to the second position to open the cabinet door), and the heptafluoropropane storage cylinder can be moved to the outside of the trolley, which is convenient for operators to disassemble and replace the heptafluoropropane storage cylinder. It is easy to use.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the fire extinguishing device in an embodiment of this application; Figure 2 This is a three-dimensional structural diagram of the fire extinguishing device from another angle in an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the fire extinguishing device in an embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of the fire extinguishing device from another perspective in an embodiment of this application; Figure 5 This is a cross-sectional structural diagram of the fire extinguishing device in an embodiment of this application; Figure 6 for Figure 5 Enlarged view of point A; Figure 7 This is a diagram showing the open state of the cabinet in an embodiment of this application; Figure 8 This is an open state diagram of the cabinet from another perspective in an embodiment of this application; Figure 9 This is a front view of the cabinet in an embodiment of this application; Figure 10 for Figure 9 BB cross-section; Figure 11 for Figure 9 CC cross-section; Figure 12 This is a schematic diagram of the connection structure of the fire extinguishing device in an embodiment of this application; Figure 13 This is a schematic diagram illustrating the principle of the self-developed component in the embodiments of this application.

[0020] The attached diagram lists the components represented by each number as follows: 1. Trolley; 11. Base; 111. Groove; 12. Housing; 121. Placement slot; 13. Push rod; 14. Casters; 21. Foam storage tank; 22. Foam mixer; 221. Inlet; 222. Foam inlet; 223. Foam outlet; 224. Outlet; 23. Heptafluoropropane mixer; 231. Heptafluoropropane inlet; 232. Foam liquid inlet; 233. Mixture outlet; 24. 1. Heptafluoropropane gas cylinder; 2. High-pressure hose; 3. Fire hose; 4. Storage cabinet; 4. Upright panel; 4. Support base; 4. Traction frame; 4. First cabinet door; 4. Second cabinet door; 4. Fixing assembly; 4. Fixing base; 4. Frame; 4. Support part; 4. Contact part; 4. Damper; 4. 4. 3. First spring; 4. 4. 3. Limiting seat; 4 514. First elastic element; 452. First clamp; 453. Second clamp; 454. Connecting assembly; 46. Slide rail mechanism; 461. First slider; 462. First guide rail; 463. Second guide rail; 47. Locking assembly; 471. Handle; 472. Fourth elastic element; 473. Connecting rod; 474. Locking tongue; 481. Cage; 482. Flexible pad; 49. Dustproof brush; 5. Control valve assembly; 51. First pressure monitoring unit; 52. Regulating valve; 53. Second pressure monitoring unit; 54. Filter; 55. First control valve; 56. Check valve; 57. Manual ball valve; 61. Water inlet valve; 62. Second control valve; 63. Third control valve; 7. Self-opening assembly; 71. Hinge seat; 72. Connecting rod; 73. Second slider; 74. Second elastic element; 75. Third elastic element; 76. Guide rod. Detailed Implementation

[0021] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" 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 this 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. Therefore, they should not be construed as limiting this invention.

[0023] Example 1 This embodiment discloses a mobile heptafluoropropane foam fire extinguishing device, comprising: like Figure 1 and Figure 2As shown, the trolley 1 includes a base 11, a housing 12, a push rod 13, and casters 14. The casters 14 are mounted on the base 11 and include two large front wheels and two swivel wheels. The two front wheels are respectively located on the left and right sides of the front end of the base 11, and the two swivel wheels are respectively located on the left and right sides of the rear end of the base 11. The push rod 13 is located at the rear end of the base 11. The housing 12 is located on the upper part of the base 11, and the housing 12 has a cavity for accommodating the equipment.

[0024] A storage cabinet 4 is provided on the base 11. A heptafluoropropane storage cylinder 24 is detachably installed inside the storage cabinet 4. The storage cabinet 4 includes a vertical plate 41, a traction frame 42, a first cabinet door 43 and a second cabinet door 44. The top and bottom of the traction frame 42 are respectively hinged to the middle of the top and bottom of the vertical plate 41. The first cabinet door 43 and the second cabinet door 44 are respectively hinged to the two sides of the vertical plate 41, and the first cabinet door 43 and the second cabinet door 44 are distributed on both sides of the traction frame 42. The traction frame 42, the first cabinet door 43 and the second cabinet door 44 can all rotate in the horizontal plane. like Figure 2 , Figure 7 , Figure 8 and Figure 9 As shown, a placement groove 121 is provided on the side of the housing 12, and the placement cabinet 4 is embedded in the placement groove 121. The placement cabinet 4 can slide between a first position and a second position. When the placement cabinet 4 is in the first position, the first cabinet door 43 and the second cabinet door 44 are located in the placement groove 121, and the placement groove 121 restricts the opening of the first cabinet door 43 and the second cabinet door 44 to lock the placement cabinet 4 in a closed state. When the placement cabinet 4 is in the second position, the traction frame 42, the first cabinet door 43 and the second cabinet door 44 are located outside the placement groove. At this time, the first cabinet door 43 and the second cabinet door 44 can be opened automatically or manually.

[0025] The bottom and both sides of the upright plate 41 are provided with slide rail mechanisms 46. The slide rail mechanism 46 includes a first slider 461, a first guide rail 462, and a second guide rail 463. The first slider 461 is hinged to the upright plate 41 and can rotate in the vertical plane. The first slider 461 located at the bottom and both sides of the upright plate 41 limits the tilt angle of the upright plate 41. The hinged connection between the first slider 461 and the upright plate 41 avoids jamming between the slider and the guide rail, facilitating the sliding of the cabinet 4 between the first and second positions (e.g., ...). Figure 2As shown, the left-side placement cabinet 4 is located in the first position, and the right-side placement cabinet 4 is located in the second position. The second guide rail 463 is horizontally set on the inner wall of the placement slot 121 or the base 11. The first guide rail 462 is slidably set on the second guide rail 463. The first slider 461 is slidably set on the first guide rail 462. The first slider 461 can slide inside the first guide rail 462. The first guide rail 462 can slide along the second guide rail 463, so that a part of the first guide rail 462 moves to the outside of the trolley 1, so that a part of the placement cabinet 4 moves to the outside of the trolley 1.

[0026] like Figure 3 and Figure 4 As shown, a foam storage tank 21, a foam mixer 22, and a heptafluoropropane mixer 23 are fixedly installed on the base 11. The foam mixer 22 is provided with a water inlet 221, a foam inlet 222, a foam liquid outlet 223, and a water outlet 224. The water inlet 221 can be connected to a fire water pipe 3. The water outlet 224 is connected to the pressure chamber of the foam storage tank 21 through a water outlet pipe. The foam inlet 222 is connected to the inner liner (the inner liner storing the foam extinguishing agent) of the foam storage tank 21 through a foam delivery pipe. The heptafluoropropane mixer 23 is equipped with a heptafluoropropane inlet 231, a foam liquid inlet 232, and a mixed liquid outlet 233. A manifold is installed inside the housing 12, which is connected to the heptafluoropropane inlet 231. The output end of the heptafluoropropane gas cylinder 241 is connected to the manifold through a high-pressure hose 241. The foam liquid inlet 232 is connected to the foam liquid outlet 223 through a foam liquid delivery pipe. The mixed liquid outlet 233 can be connected to external equipment such as nozzles and spray guns through pipelines to realize the output of heptafluoropropane foam mixed liquid.

[0027] The high-pressure hose 241 is curved, and can be bent or unfolded when the cabinet 4 moves between the first and second positions.

[0028] like Figure 12 As shown, a control valve assembly 5 is installed between the heptafluoropropane storage cylinder 24 and the heptafluoropropane inlet 231. The control valve assembly 5 includes, in sequence along the fluid delivery direction, a first pressure monitoring unit 51, a regulating valve 52, a second pressure monitoring unit 53, a filter 54, a first control valve 55, a check valve 56, and a manual ball valve 57. A water inlet valve 61 is installed at the water inlet 221, a second control valve 62 is installed between the foam liquid outlet 223 and the heptafluoropropane mixer 23, and a third control valve 63 is installed at the mixed liquid outlet 233.

[0029] Specifically: the first pressure monitoring unit 51 is a pressure gauge used to detect the pressure of the extinguishing agent in the manifold; the regulating valve 52 is used to regulate the valve for balanced delivery of heptafluoropropane; the second pressure monitoring unit 53 is a pressure sensor used to detect the pressure of the regulated heptafluoropropane; the filter 54 is used to regulate the pressure of the heptafluoropropane in the manifold; the first control valve 55 is an electric valve used to control the opening or closing of the heptafluoropropane inlet 231; the check valve 56 prevents the backflow of heptafluoropropane or foam liquid; the manual ball valve 57 is used to manually open or close the heptafluoropropane inlet 231; the water inlet valve 61 is an electric valve used to open or close the water inlet 221; the second control valve 62 is an electric valve used to open or close the foam liquid inlet 232; and the third control valve 63 is an electric valve used to open or close the mixed liquid outlet 233.

[0030] It also includes a control cabinet, which is embedded in the housing 12. The control cabinet is electrically connected to the first pressure monitoring unit 51, the regulating valve 52, the second pressure monitoring unit 53, the filter 54, the first control valve 55, the inlet valve 61, the second control valve 62, and the third control valve 63. The control cabinet can be manually controlled and remotely controlled.

[0031] Workflow: like Figure 13 As shown, fire water pipe 3 is connected to inlet 221 (a1 is the fire water input end). When the control cabinet is in remote automatic control mode, after confirming fire, the control cabinet remotely receives the start signal and opens the valves (including inlet valve, second control valve 62, third control valve 63 and first control valve 55) according to the program. If the control cabinet is in manual control mode, after confirming fire, the control cabinet is manually operated to open the valves. Fire water is fed into the foam mixer 22 through the fire water pipe 3, and part of the water enters the foam storage tank 21. The foam in the foam storage tank 21 is forced into the foam mixer 22 through the foam inlet 222. The foam and water are mixed in the foam mixer 22 and the foam liquid is output through the foam outlet 223. Heptafluoropropane storage cylinder 24 delivers heptafluoropropane to heptafluoropropane mixer 23 through high-pressure hose 241. Heptafluoropropane enters heptafluoropropane mixer 23 through heptafluoropropane inlet 231, and foam liquid enters heptafluoropropane mixer 23 through foam liquid inlet 232. Heptafluoropropane and foam liquid are mixed in heptafluoropropane mixer 23 to obtain heptafluoropropane foam mixture (a2 is the output end of heptafluoropropane foam mixture).

[0032] The opening time of the inlet valve 61 and the second control valve 62 shall not exceed 30 seconds, and the opening time of the first control valve 55 shall not exceed 5 seconds.

[0033] Example 2 This embodiment is an improvement on embodiment 1, with the improvement being the fixing method of the heptafluoropropane storage cylinder 24.

[0034] In this embodiment, two sets of fixing components 45 are provided in the middle of the upright plate 41, and a support base 411 is provided at the bottom of the upright plate 41. The fixing components 45 are used to restrict the horizontal direction of the heptafluoropropane storage cylinder 24, and the support base 411 is used to support the heptafluoropropane storage cylinder 24. The support base 411 only fits against a part of the lower surface of the heptafluoropropane storage cylinder 24, which makes it convenient for operators to remove the heptafluoropropane storage cylinder 24 from the upright plate 41.

[0035] The fixing component 45 includes a fixing base 451, a first hoop 452, a second hoop 453, and a connecting component 454. The fixing base 451 is fixedly mounted on the upright plate 41. The first hoop 452 and the second hoop 453 are both hinged to the fixing base 451, and the ends of the first hoop 452 and the second hoop 453 away from the fixing base 451 are detachably connected through the connecting component 454.

[0036] The mounting base 451 includes a support portion 4511, a contact portion 4512, a damper 4513, and a first elastic element 4514. Two support portions 4511 are provided on the upright plate 41, located on the same horizontal plane. The two ends of the contact portion 4512 are connected to the ends of the two support portions 4511 furthest from the upright plate 41, forming a hollow area between the contact portion 4512 and the two support portions 4511. The damper 4513 is mounted on the upright plate 41 within the hollow area, with its telescopic end connected to the middle of the contact portion 4512. First elastic elements 4514 are provided on both sides of the damper 4513, with their two ends connected to the upright plate 41 and the contact portion 4512, respectively. The mounting base 451 with this structure can, to a certain extent, reduce and buffer the horizontal swaying of the heptafluoropropane storage cylinder 24.

[0037] In one embodiment, the damper 4513 includes two first spring plates 45131 and a limiting seat 45132. The two first spring plates are fixedly disposed on the contact portion 4512, and the limiting seat is fixedly disposed on the upright plate 41. The two first spring plates are provided with hook portions at one end near the limiting seat. The hook portions of the first spring plates abut against the side wall of the limiting seat. The first spring plates are used to provide elastic force to make the hook portions abut against the side wall of the limiting seat. The side wall of the limiting seat is provided with protrusions for limiting the range of movement of the hook portions. In one implementation, the first elastic element 4514 is a second spring sheet.

[0038] In this embodiment, the caster 14 is equipped with a shock-absorbing structure (not shown in the figure) to dampen and buffer the vertical vibration of the trolley.

[0039] In one implementation, the connecting component 454 is a quick-release shaft or bolt.

[0040] Preferably, a retainer 481 is provided on the inner side of both the first cabinet door 43 and the second cabinet door 44. A flexible pad 482 is provided on the side of the retainer 481 facing the heptafluoropropane storage cylinder 24. When the first cabinet door 43 and the second cabinet door 44 are closed, the retainer 482 and the flexible pad 482 can support the heptafluoropropane storage cylinder 24 and have a certain buffering function.

[0041] The housing 12 has clearance holes for the slide rail mechanism 46 and hinges to pass through, and the first cabinet door 43 and the second cabinet door 44 are equipped with dustproof brushes 49. When the cabinet 4 is in the first position, the dustproof brushes 49 can block the clearance holes.

[0042] Example 3 This embodiment is an improvement on embodiment 1. The improvement is the addition of an automatic opening component 7, which allows the first cabinet door 43 and the second cabinet door 44 to open automatically when the cabinet 4 moves from the first position to the second position.

[0043] like Figure 7 and Figure 10 As shown, in this embodiment, a self-opening assembly 7 is provided on the upright plate 41. The self-opening assembly 7 includes a hinge seat 71, a connecting rod 72, a second slider 73, a second elastic element 74, and a third elastic element 75. A hinge seat 71 is provided on both the first cabinet door 43 and the second cabinet door 44. A horizontal guide rod 76 is provided on the upright plate 41. Two second sliders 73 are slidably arranged on the guide rod 76. The second sliders 73 are connected to the adjacent hinge seats 71 through the connecting rod 72. The two ends of the connecting rod 72 are respectively hinged to the second sliders. On the hinge seat 73 and the hinge base 71, the second elastic element 74 is used to provide elastic force to move the two second sliders 73 away from each other. Each hinge base 71 is provided with a third elastic element 75. One end of the third elastic element 75 is hinged to the end of the connecting rod 72 near the hinge base 71, and the other end of the third elastic element 75 is hinged to the vertical plate 41. The third elastic element 75 is used to provide elastic force to rotate the hinge base 71 outward, and the direction of the force applied by the third elastic element 75 is different from the direction of the force applied by the second elastic element 74.

[0044] like Figure 13 As shown, during use, when the cabinet 4 moves from the first position to the second position, the second elastic element 74 pushes the two sliders 73 away from each other, so as to push the hinge seat 71 (i.e. the first cabinet door 43 and the second cabinet door 44) to rotate outward through the connecting rod 72. The second elastic element 72 applies a force F1 to the hinge seat 71 through the connecting rod 72, and the third elastic element 75 applies a force F2 to the hinge seat 71 through the connecting rod 72. In the initial stage of cabinet door rotation, the torque of F2 is greater than the torque of F1. When the cabinet door rotates to a certain angle, the torque of F2 is less than the torque of F1 until the cabinet door is fully opened.

[0045] Example 4 This embodiment is an improvement on embodiment 1, the improvement being the addition of a locking component 47.

[0046] like Figure 5 and Figure 6 As shown, in this embodiment, a locking component 47 is provided on the traction frame 42. The locking component 47 includes a handle 471, a fourth elastic element 472, a connecting rod 473, and a locking tongue 474. The handle 471 is slidably disposed on the outside of the traction frame 42 and can slide up and down along the traction frame 42. The connecting rod 473 is vertically disposed on the inside of the traction frame 42 and the top of the connecting rod 473 is fixedly connected to the handle 471. The locking tongue 474 is disposed at the bottom of the connecting rod 473 and can pass through the traction frame 42. The fourth elastic element 472 is used to provide an elastic force to move the handle 471 downward. The trolley 1 is provided with a groove 111 that cooperates with the locking tongue 474.

[0047] When it is necessary to replace the heptafluoropropane storage cylinder 24, push the handle 471 upwards, and the locking tongue 474 will disengage from the groove 111, thereby unlocking the storage cabinet 4. Then, the storage cabinet 4 can be moved from the first position to the second position to open the storage cabinet 4.

[0048] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A mobile heptafluoropropane foam fire extinguishing device, characterized in that, include: A trolley (1) is provided with a foam storage tank (21), a foam mixer (22), and a heptafluoropropane mixer (23). The foam mixer (22) is provided with a water inlet (221), a foam inlet (222), and a foam liquid outlet (223). The water inlet (221) can be detachably connected to a fire water pipe (3). The foam inlet (222) is connected to the foam storage tank (21). The heptafluoropropane mixer (23) is provided with a heptafluoropropane inlet (231), a foam liquid inlet (232), and a mixture outlet (233). The foam liquid inlet (232) and the foam liquid outlet (223) are connected to the foam storage tank (21). 3) Connection: The trolley (1) is fitted with a storage cabinet (4), and a heptafluoropropane storage cylinder (24) is detachably installed inside the storage cabinet (4). The heptafluoropropane inlet (231) is connected to the heptafluoropropane storage cylinder (24) through a bent high-pressure hose (241). The storage cabinet (4) can slide between a first position and a second position. When the storage cabinet (4) is in the first position, the storage cabinet (4) is inside the trolley (1) and locked in a closed state. When the storage cabinet (4) is in the second position, a part of the storage cabinet (4) is outside the trolley (1), and the storage cabinet (4) can be opened automatically or manually.

2. The mobile heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that, A control valve group (5) is provided between the heptafluoropropane storage cylinder (24) and the heptafluoropropane inlet (231). The control valve group (5) includes a first pressure monitoring unit (51), a regulating valve (52), a second pressure monitoring unit (53), a filter (54), a first control valve (55), and a check valve (56) arranged sequentially along the conveying direction.

3. The mobile heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that, A water inlet valve (61) is provided at the water inlet (221), a second control valve (62) is provided between the foam liquid outlet (223) and the heptafluoropropane mixer (23), and a third control valve (63) is provided at the mixture outlet (233).

4. The mobile heptafluoropropane foam fire extinguishing device according to claim 1, characterized in that, The storage cabinet (4) includes a vertical plate (41), a traction frame (42), a first cabinet door (43), and a second cabinet door (44). The trolley (1) is provided with a storage slot (111). The vertical plate (41) is slidably disposed in the storage slot (111). The vertical plate (41) is provided with a fixing component (45) for limiting the horizontal position of the heptafluoropropane storage cylinder (24). The bottom of the vertical plate (41) is provided with a support base (411) for supporting the heptafluoropropane storage cylinder (24). The support base (411) and the heptafluoropropane storage cylinder (24) are connected. The lower surface of the frame (42) is partially in contact with the top and bottom center of the upright plate (41). The first cabinet door (43) and the second cabinet door (44) are respectively hinged to the two sides of the upright plate (41). In the first position, the first cabinet door (43) and the second cabinet door (44) are located in the placement groove (111), which restricts the opening of the first cabinet door (43) and the second cabinet door (44). In the second position, the first cabinet door (43) and the second cabinet door (44) are located outside the placement groove (111).

5. The mobile heptafluoropropane foam fire extinguishing device according to claim 4, characterized in that, The bottom and both sides of the upright plate (41) are provided with slide rail mechanisms (46). The slide rail mechanism (46) includes a first slider (461), a first guide rail (462) and a second guide rail (463). The first slider (461) is hinged to the upright plate (41). The first slider (461) can rotate in the vertical plane. The first slider (461) is slidably disposed on the first guide rail (462). The first guide rail (462) is slidably disposed on the second guide rail (463). The first guide rail (462) can slide along the second guide rail (463) so that part of the first guide rail (462) moves to the outside of the trolley (1).

6. The mobile heptafluoropropane foam fire extinguishing device according to claim 4, characterized in that, The fixing component (45) includes a fixing base (451), a first hoop (452), a second hoop (453), and a connecting component (454). The fixing base (451) is fixedly installed inside the placement cabinet (4). The first hoop (452) and the second hoop (453) are both hinged to the fixing base (451). The ends of the first hoop (452) and the second hoop (453) away from the fixing base (451) are detachably connected through the connecting component (454).

7. The mobile heptafluoropropane foam fire extinguishing device according to claim 6, characterized in that, The fixed base (451) includes a support part (4511), a contact part (4512), a damper (4513), and a first elastic element (4514). Two support parts (4511) are fixedly provided on the upright plate (41). The two ends of the contact part (4512) are respectively fixedly connected to the ends of the two support parts (4511) away from the upright plate (41). The first elastic element (4513) and the damper (4512) are both fixedly provided on the upright plate (41) and located between the two support parts (4511). The telescopic end of the damper (4512) is fixedly connected to the contact part (4512). The first elastic element (4513) abuts against the contact part (4513).

8. The mobile heptafluoropropane foam fire extinguishing device according to claim 4, characterized in that, The placement cabinet (4) is equipped with a self-opening component (7), which includes a hinge seat (71), a connecting rod (72), a second slider (73), and a second elastic element (74). The first cabinet door (43) and the second cabinet door (44) are both equipped with hinge seats (71). Two second sliders (73) are slidably arranged on the upright plate (41). The second sliders (73) are connected to the adjacent hinge seats (71) through the connecting rod (72). The two ends of the connecting rod (72) are respectively hinged to the second sliders (73) and the hinge seats (71). The second elastic element (74) is used to provide elastic force to make the two second sliders (73) move away from each other.

9. The mobile heptafluoropropane foam fire extinguishing device according to claim 8, characterized in that, The self-opening assembly (7) also includes a third elastic element (75), one end of which is hinged to the end of the connecting rod (72) near the hinge seat (71), and the other end of which is hinged to the upright plate (41).

10. The mobile heptafluoropropane foam fire extinguishing device according to claim 4, characterized in that, The traction frame (42) is provided with a locking component (47), which includes a handle (471), a fourth elastic element (472), a connecting rod (473), and a locking tongue (474). The handle (471) is slidably disposed on the outside of the traction frame (42) and can slide up and down. The connecting rod (473) is vertically disposed on the inside of the traction frame (42) and the top of the connecting rod (473) is fixedly connected to the handle (471). The locking tongue (474) is disposed at the bottom of the connecting rod (473) and can pass through the traction frame (42). The fourth elastic element (472) is used to provide an elastic force to move the handle (471) downward. The trolley (1) is provided with a groove (111) that cooperates with the locking tongue (474).

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