Fire-retardant hydraulic folding hatch cover structure and its fire extinguishing method

Abstract

The application discloses a fire-retardant hydraulic folding cargo hatch cover structure and a fire extinguishing method thereof, and belongs to the technical field of cargo hatch cover fire prevention. The structure comprises a hatch frame and a hatch cover plate. A gas pump is arranged in the hatch cover plate. The gas inlet of the gas pump is arranged above the hatch cover plate. The gas outlet of the gas pump is connected with a main gas conveying pipe. A plurality of auxiliary gas conveying pipes arranged in an axial linear array are connected to the main gas conveying pipe. Each auxiliary gas conveying pipe is connected with a wind type fire retarder arranged below the hatch cover plate. A smoke alarm is arranged below the hatch cover plate. The smoke alarm is provided with a controller and is electrically connected with the gas pump through the controller. The smoke alarm and the controller are linked to automatically start the gas pump in case of fire, without manual operation and with rapid response. The wind type fire retarder is designed to be pushed by wind to drive the switch sleeve, so that the fire-retardant powder is continuously released (instead of instant explosion), and the problem that the dry powder fire extinguishing ball cannot continuously extinguish fire is solved.

Description

Technical Field

[0001] This invention relates to the field of fireproof technology for cargo ship hatch covers, specifically to a flame-retardant hydraulic folding cargo ship hatch cover structure and its fire extinguishing method. Background Technology

[0002] Existing cargo ships typically have fire suppression systems (such as sprinklers and fire extinguishers) installed on the top of the hold. However, the area below the hatch covers (i.e., the space between the cargo storage area and the hatch) lacks specific fire prevention measures. In other words, existing hatch covers do not integrate fire suppression functionality. Once a fire occurs inside the hold, flames can easily spread from below the hatch covers, posing a safety hazard. To address this, many hatch covers have begun to suspend easily installed dry powder fire extinguishing balls at their bottom. However, traditional dry powder fire extinguishing balls only provide instantaneous explosion and cannot provide sustained flame retardancy, making it difficult to completely control the fire. Therefore, there is an urgent need for a hydraulically folding hatch cover that integrates automatic triggering and sustained flame retardancy functions to solve the problem of insufficient sustained fire suppression below the hatch covers. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide a flame-retardant hydraulic folding cargo ship hatch cover structure, which realizes automatic triggering and continuous flame retardancy of fire under the hatch cover through a built-in air pump, a wind-type flame retardant and a smoke alarm system, thus solving the problem that fires under the hatch cover cannot be continuously extinguished.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A flame-retardant hydraulic folding cargo ship hatch cover structure includes a hatch frame and a hatch cover plate that is movably installed on the hatch frame and can be opened or closed.

[0006] Its core improvement lies in the following: an air pump is installed inside the hatch cover; the air pump's inlet is located above the hatch cover, and the air pump's outlet is connected to a main air supply pipe. Multiple auxiliary air supply pipes are connected to the main air supply pipe in a linear array along the axis. Each auxiliary air supply pipe is connected to a wind-type flame retardant located below the hatch cover. A smoke detector is installed below the hatch cover, and the smoke detector has a built-in controller and is electrically connected to the air pump through the controller.

[0007] The wind-type flame retardant includes an upper shell and a lower shell that is detachably installed below the upper shell. The lower shell has a mixing chamber that communicates with the outside. The inner wall of the mixing chamber has multiple storage boxes arranged in a circumferential array. Each storage box is equipped with a sealing cover. Each storage box is filled with flame retardant powder. Each storage box has multiple powder outlet slots arranged in a circumferential array that communicate with the mixing chamber on its side wall.

[0008] The bottom of the mixing chamber is provided with multiple brackets arranged in a circumferential array, and a vertically fixed guide rod is fixed above each bracket; the mixing chamber is provided with a connecting plate that is slidably installed on all the guide rods, and each guide rod is fitted with a push spring that pushes the connecting plate to slide upward. Above each guide rod is a stop block that prevents the connecting plate from sliding upward; below the connecting plate are multiple switch sleeves arranged in a circumferential array and used in conjunction with the storage box. On the side wall of each switch sleeve are multiple powder outlet slots arranged in a circumferential array and used in conjunction with the powder outlet slot.

[0009] By adopting the above solution, the smoke detector is linked with the controller to automatically start the air pump in case of fire, without manual operation and with a rapid response. The wind-type flame retardant, through the design of "wind-driven switch sliding sleeve", realizes the continuous release of flame retardant powder (instead of instantaneous explosion), which solves the problem that dry powder fire extinguishing balls cannot continuously extinguish fires.

[0010] As a preferred embodiment of a flame-retardant hydraulic folding cargo ship hatch cover structure, when air is supplied from top to bottom in the mixing chamber, the air force can push the connecting plate and drive all the switch sleeves to move downwards synchronously. At this time, powder outlet trough one and powder outlet trough two overlap, and the flame-retardant powder in the storage box mixes with the air in the mixing chamber, realizing "release on demand". When no air is supplied in the mixing chamber, the push spring pushes the connecting plate and drives all the switch sleeves to move upwards synchronously. At this time, powder outlet trough one and powder outlet trough two do not overlap, and the flame-retardant powder in the storage box cannot enter the mixing chamber, thus achieving moisture protection for the flame-retardant powder.

[0011] In a preferred embodiment of a flame-retardant hydraulic folding cargo ship hatch cover structure, the stop block is a nut, which is threaded onto the guide rod to facilitate adjustment of the stop block position, control of the travel of the switch sleeve, and adjustment of the elastic force of the push spring, making it more flexible in application.

[0012] As a preferred embodiment of a flame-retardant hydraulic folding cargo ship hatch cover structure, the interior of the upper shell is provided with multiple circumferentially arrayed air guide plates to guide strong winds to flow in a concentrated and uniform manner within the mixing chamber, thereby improving the more uniform mixing of flame-retardant powder and strong winds.

[0013] The second technical problem to be solved by the present invention is to provide a flame-retardant hydraulic folding cargo ship hatch cover structure. The hatch cover adopts a hydraulic folding design, which is easy to store and suitable for the frequent opening and closing needs of cargo ship hatches, thus solving the problem of the large space occupied by the hatch cover after it is opened.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] Based on the above scheme, the hatch cover includes a left folding cover and a right folding cover; both the left and right folding covers are made of two single covers hinged together; the left and right sides of the hatch frame are respectively provided with top seats that are fixedly connected to the left and right folding covers, the top seats are hinged to the hatch, and the bottom of the top seats is movably installed with hydraulic rods that can open the left and right folding covers by pushing them up or close them by lowering them down.

[0016] By adopting the above solution, the hatch cover is designed with hydraulic folding. The hatch cover is opened and closed by using a hydraulic rod, which makes it easy to store, takes up less space, and is suitable for the frequent opening and closing needs of cargo ship hatches.

[0017] As a preferred embodiment of a flame-retardant hydraulic folding cargo ship hatch cover structure, the hatch frame is provided with left and right extending slide rails on both the front and rear sides. The slide rails located at the front and rear are equipped with pulleys that are rotatably mounted on the left and right folding covers. The pulleys, in conjunction with the slide rails, can reduce the friction during folding, and the hatch cover will have a better noise reduction effect when opening / closing.

[0018] The third technical problem to be solved by the present invention is to provide a fire extinguishing method for a flame-retardant hydraulic folding cargo ship hatch cover structure. By using a built-in air pump, a wind-type flame retardant and a smoke alarm system, the fire below the hatch cover can be automatically triggered and continuously flame-retarded, thus solving the problem of the inability to continuously extinguish fires below the hatch cover.

[0019] To achieve the above objectives, the present invention adopts the following technical solution:

[0020] A fire extinguishing method for a flame-retardant hydraulic folding cargo ship hatch cover structure, wherein the method is implemented using the aforementioned flame-retardant hydraulic folding cargo ship hatch cover structure, and the fire extinguishing steps are as follows:

[0021] S1. If a fire accidentally breaks out in the hold of a cargo ship, the resulting thick smoke will trigger the smoke detector under the hatch cover, at which point the smoke detector will issue an alarm signal.

[0022] S2. At the same time, the controller inside the smoke detector will start the air pump, which will send air into the main air supply pipe. Then, the strong wind will be delivered to each wind-type flame retardant along the auxiliary air supply pipe.

[0023] S3. After the strong wind enters the shell, it blows air from top to bottom along the mixing chamber. At this time, the wind can push the linkage plate and drive all the switch sliding sleeves to move down synchronously. The powder outlet trough one and the powder outlet trough two overlap. The flame retardant powder in the storage box mixes with the strong wind in the mixing chamber to form a "flame retardant mist". This causes the strong wind to carry the flame retardant powder to continuously blow towards the flame, so that the hatch cover can continuously extinguish the fire until the fire is extinguished.

[0024] As a preferred embodiment of the fire extinguishing method for a flame-retardant hydraulic folding cargo ship hatch cover structure, the flame-retardant powder in the storage box can ensure that the hatch cover can continuously extinguish the fire for more than 10 minutes. Since the optimal time for extinguishing a fire is the first 5-10 minutes after it occurs, the flame-retardant powder can continuously extinguish the fire for more than 10 minutes, which is conducive to better control of the fire and is safer and more reliable in application.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. Automatic Trigger: The gas pump is automatically activated in case of fire by linking the smoke detector with the controller, requiring no manual operation and responding quickly;

[0027] 2. Continuous flame retardancy: The wind-driven flame retardant uses a "wind-driven switch sliding sleeve" design to achieve continuous release of flame retardant powder (rather than instantaneous explosion), solving the problem that dry powder fire extinguishing balls cannot continuously extinguish fires;

[0028] 3. Compact structure: The air pump and wind-type flame retardant are installed inside the hatch cover, without taking up extra space or affecting the normal use of the hatch.

[0029] 4. Convenient folding: The hatch cover adopts a hydraulic folding design, which is easy to store and suitable for the frequent opening and closing needs of cargo ship hatches.

[0030] 5. Safe and reliable: The flame retardant powder in the storage box can ensure that the hatch cover can continuously extinguish the fire for more than 10 minutes. Since the best time to extinguish a fire is within the first 5-10 minutes after it occurs, the flame retardant powder can continuously extinguish the fire for more than 10 minutes, which is conducive to better control of the fire. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A three-dimensional structure for flame-retardant hydraulic folding cargo ship hatch covers. Figure 1 ;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 A three-dimensional structure for flame-retardant hydraulic folding cargo ship hatch covers. Figure 2 ;

[0035] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0036] Figure 5 It is a three-dimensional structure with a single cover plate. Figure 1 ;

[0037] Figure 6 It is a three-dimensional structure with a single cover plate. Figure 2 ;

[0038] Figure 7 To demonstrate the three-dimensional structure inside a single cover plate;

[0039] Figure 8 A three-dimensional structural diagram of a wind-type flame retardant;

[0040] Figure 9 The lower shell has a three-dimensional structure. Figure 1 ;

[0041] Figure 10 The lower shell has a three-dimensional structure. Figure 2 ;

[0042] Figure 11 This is a three-dimensional structural diagram of the upper shell;

[0043] Figure 12 To illustrate the internal structure of the lower shell;

[0044] Reference numerals: 1-Hatch frame; 2-Hatch cover; 21-Left folding cover; 22-Right folding cover; 23-Single cover; 24-Top seat; 25-Hydraulic rod; 26-Slide rail; 27-Pulley; 3-Air pump; 4-Main air supply pipe; 5-Auxiliary air supply pipe; 6-Wind-type flame retardant; 61-Upper shell; 62-Lower shell; 63-Mixing chamber; 64-Storage box; 65-Sealing cover; 66-Air guide plate; 67-Powder outlet trough one; 68-Bracket; 69-Guide rod; 610-Connecting plate; 611-Push spring; 612-Block; 613-Switch sleeve; 614-Powder outlet trough two; 7-Smoke detector. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1 , Figure 3 As shown, a flame-retardant hydraulic folding cargo ship hatch cover structure includes a hatch frame 1 and a hatch cover 2 that is movably installed on the hatch frame 1 and can be opened or closed.

[0047] like Figures 1 to 3 As shown, the hatch cover 2 includes a left folding cover 21 and a right folding cover 22; both the left folding cover 21 and the right folding cover 22 are hinged together from two single cover plates 23; the left and right sides of the hatch frame 1 are respectively provided with top seats 24 that are fixedly connected to the left folding cover 21 and the right folding cover 22. The top seats 24 are hinged to the hatch, and the bottom of the top seats 24 is movably installed with hydraulic rods 25 that can open the left folding cover 21 and the right folding cover 22 by pushing them up or closing them by lowering them down; the hatch cover 2 adopts a hydraulic folding design, and the hatch cover 2 is opened / closed by using hydraulic rods 25, which is convenient for storage, occupies less space, and is suitable for the frequent opening and closing needs of cargo ship hatches.

[0048] like Figure 4 As shown, the hatch frame 1 is provided with left and right extending slide rails 26 on both the front and rear sides. The slide rails 26 located at the front and rear are equipped with pulleys 27 that are rotatably mounted on the left folding cover plate 21 and the right folding cover plate 22. The pulleys 27, in conjunction with the slide rails 26, can reduce the friction during folding, and the hatch cover plate 2 will have a better silent effect when opening / closing.

[0049] like Figures 5 to 7 As shown, an air pump 3 is installed inside the hatch cover 2; the air inlet of the air pump 3 is located above the hatch cover 2, and the air outlet of the air pump 3 is connected to a main air supply pipe 4. Twelve auxiliary air supply pipes 5 are connected to the main air supply pipe 4 in an axial linear array. Each auxiliary air supply pipe 5 is connected to a wind-type flame retardant 6 that is located below the hatch cover 2. A smoke detector 7 is located below the hatch cover 2. The smoke detector 7 has a built-in controller and is electrically connected to the air pump 3 through the controller.

[0050] like Figures 8 to 12As shown, the wind-type flame retardant 6 includes an upper housing 61 and a lower housing 62 detachably installed below the upper housing 61. The lower housing 62 has a mixing chamber 63 communicating with the outside. The inner wall of the mixing chamber 63 has multiple circumferentially arrayed storage boxes 64. Each storage box 64 has a sealing cover 65 installed above it. Each storage box 64 is filled with flame retardant powder. Each storage box 64 has six circumferentially arrayed powder outlet slots 67 on its side wall, communicating with the mixing chamber 63. The bottom of the mixing chamber 63 has six circumferentially arrayed brackets 68, and each bracket 68 has a vertically fixed guide rod 69 fixed above it. The mixing chamber 63 has a connecting plate 610 that is simultaneously slidably installed on all the guide rods 69. Each guide rod 69... The upper part of the guide rod 69 is equipped with a push spring 611 that pushes the connecting plate 610 to slide upward. Above each guide rod 69, there is a stop block 612 that prevents the connecting plate 610 from sliding upward. Below the connecting plate 610, there are 6 circumferentially arrayed switch sleeves 613 that cooperate with the storage box 64. Each switch sleeve 613 has 3 circumferentially arrayed powder outlet slots 614 that cooperate with the powder outlet slots on its side wall. The smoke detector 7 is linked with the controller to realize the automatic start of the air pump 3 in case of fire, without manual operation and with rapid response. The wind-type flame retardant 6 realizes the continuous release of flame retardant powder (instead of instantaneous explosion) through the design of "wind-driven switch sleeves 613", which solves the problem that dry powder fire extinguishing balls cannot continuously extinguish fires.

[0051] like Figure 12 As shown, when air is supplied from top to bottom in the mixing chamber 63, the air force can push the connecting plate 610 and drive all the switch sleeves 613 to move downwards synchronously. At this time, the powder outlet 67 and the powder outlet 614 overlap, and the flame retardant powder in the storage box 64 mixes with the air in the mixing chamber 63 to achieve "release on demand". When no air is supplied in the mixing chamber 63, the push spring 611 pushes the connecting plate 610 and drives all the switch sleeves 613 to move upwards synchronously. At this time, the powder outlet 67 and the powder outlet 614 do not overlap, and the flame retardant powder in the storage box 64 cannot enter the mixing chamber 63, thus achieving moisture prevention for the flame retardant powder.

[0052] like Figures 9 to 10 As shown, the stop block 612 is a nut, which is threaded onto the guide rod 69 to facilitate adjustment of the position of the stop block 612, control of the stroke of the switch sleeve 613, and adjustment of the elastic force of the push spring 611, making it more flexible in application.

[0053] like Figure 11 As shown, the upper housing 61 has 12 circumferentially arrayed air guide plates 66 inside, which guide the strong wind to flow in a concentrated and uniform manner in the mixing chamber 63, thereby improving the more uniform mixing of flame retardant powder and strong wind.

[0054] A fire extinguishing method for a flame-retardant hydraulic folding cargo ship hatch cover structure, wherein the method is implemented using the aforementioned flame-retardant hydraulic folding cargo ship hatch cover structure, and the fire extinguishing steps are as follows:

[0055] S1. If a fire accidentally breaks out in the cargo ship's hold, the resulting thick smoke will trigger the smoke detector 7 below the hatch cover 2, at which point the smoke detector 7 will issue an alarm signal.

[0056] S2. At the same time, the controller inside the smoke detector 7 will start the air pump 3. The air pump 3 will send air into the main air supply pipe 4, and then the strong wind will deliver the air to each wind-type flame retardant 6 along the auxiliary air supply pipe 5.

[0057] S3. After the strong wind enters the shell, it blows air from top to bottom along the mixing chamber 63. At this time, the wind can push the linkage plate 610 and drive all the switch sliding sleeves 613 to move down synchronously. The powder outlet 67 and the powder outlet 614 overlap. The flame retardant powder in the storage box 64 mixes with the strong wind in the mixing chamber 63 to form a "flame retardant mist". This allows the strong wind to carry the flame retardant powder and continuously blow it toward the flame, so that the hatch cover 2 can extinguish the fire for more than 10 minutes until the fire is extinguished.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 flame-retardant hydraulic folding cargo ship hatch cover structure, comprising a hatch frame and a hatch cover plate movably mounted on the hatch frame and capable of being opened or closed. Its features are: An air pump is installed inside the hatch cover; the air inlet of the air pump is located through the top of the hatch cover, and the air outlet of the air pump is connected to a main air supply pipe. Multiple auxiliary air supply pipes are connected to the main air supply pipe in a linear array along the axis. Each auxiliary air supply pipe is connected to a wind-type flame retardant that is located through the bottom of the hatch cover. A smoke detector is installed below the hatch cover, wherein the smoke detector has a built-in controller and is electrically connected to the air pump through the controller. The wind-type flame retardant includes an upper shell and a lower shell that is detachably installed below the upper shell. The lower shell has a mixing chamber that communicates with the outside. The inner wall of the mixing chamber has multiple storage boxes arranged in a circumferential array. Each storage box is equipped with a sealing cover. Each storage box is filled with flame retardant powder. Each storage box has multiple powder outlet slots arranged in a circumferential array that communicate with the mixing chamber on its side wall. The bottom of the mixing chamber is provided with multiple brackets arranged in a circumferential array, and a vertically fixed guide rod is fixed above each bracket; the mixing chamber is provided with a connecting plate that is slidably installed on all the guide rods simultaneously, and each guide rod is fitted with a push spring that pushes the connecting plate to slide upward, and a blocking block that prevents the connecting plate from sliding upward is provided above each guide rod; multiple circumferentially arrayed switch sleeves that cooperate with the storage box are connected below the connecting plate, and multiple circumferentially arrayed powder outlet slots that cooperate with the powder outlet slots are opened on the side wall of each switch sleeve; When air is blown from top to bottom in the mixing chamber, the air force can push the connecting plate and drive all the switch sleeves to move down synchronously. At this time, powder outlet trough one and powder outlet trough two overlap, and the flame retardant powder in the storage box mixes with the air in the mixing chamber. When no air is supplied to the mixing chamber, the push spring pushes the linkage plate and drives all the switch sleeves to move upward synchronously. At this time, powder outlet trough one and powder outlet trough two do not overlap, and the flame retardant powder in the storage box cannot enter the mixing chamber.

2. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 1, characterized in that: The stop block is a nut, which is threaded onto the guide rod.

3. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 1, characterized in that: The flame retardant powder is ammonium phosphate powder or sodium bicarbonate powder.

4. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 1, characterized in that: The upper housing is equipped with multiple circumferentially arrayed air guide plates inside.

5. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 1, characterized in that: The hatch cover includes a left folding cover and a right folding cover; Both the left and right folding covers are made of two single covers hinged together.

6. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 5, characterized in that: The hatch frame is provided with top seats on the left and right sides respectively, which are fixedly connected to the left folding cover and the right folding cover. The top seats are hinged to the hatch, and the bottom of the top seats is movably installed with hydraulic rods that can open the left folding cover and the right folding cover by pushing them up or closing them by lowering them down.

7. The flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 6, characterized in that: The hatch frame is equipped with left and right extending slide rails on both the front and rear sides, and the slide rails at the front and rear are equipped with pulleys that are rotatably mounted on the left and right folding covers.

8. A fire extinguishing method for a flame-retardant hydraulically folding cargo ship hatch cover structure, characterized in that: This method is implemented using the flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 2, and its fire extinguishing steps are as follows: S1. If a fire accidentally breaks out in the hold of a cargo ship, the resulting thick smoke will trigger the smoke detector under the hatch cover, at which point the smoke detector will issue an alarm signal. S2. At the same time, the controller inside the smoke detector will start the air pump, which will send air into the main air supply pipe. Then, the strong wind will be delivered to each wind-type flame retardant along the auxiliary air supply pipe. S3. After the strong wind enters the shell, it blows air from top to bottom along the mixing chamber. At this time, the wind can push the linkage plate and drive all the switch sliding sleeves to move down synchronously. The powder outlet trough one and the powder outlet trough two overlap. The flame retardant powder in the storage box mixes with the strong wind in the mixing chamber to form a "flame retardant mist". This causes the strong wind to carry the flame retardant powder to continuously blow towards the flame, so that the hatch cover can continuously extinguish the fire until the fire is extinguished.

9. The fire extinguishing method for the flame-retardant hydraulic folding cargo ship hatch cover structure according to claim 8, characterized in that: The flame-retardant powder in the storage box can ensure that the hatch cover can continuously extinguish fire for more than 10 minutes.

Images