A fast-adjustable ship cabin flooding information nomogram slide rule and its use method

Abstract

The present invention provides a rapidly adjustable nomogram slide rule for ship cabin flooding information and a method for using the same. The slide rule comprises: a nomogram base plate for marking parameters related to damage and flooding; the nomogram base plate has five parameter slots, namely, a slot for breach location and depth, a slot for cabin area, a slot for liquid level rise rate, a slot for water inflow, and a slot for breach size; a stop bolt disposed on each parameter slot; and slotted slide bars disposed on the upper and lower sides of the nomogram base plate. The stop bolts pass through the upper slotted slide bar, the parameter slot, and the lower slotted slide bar, respectively. The stop bolts are provided with locking devices for locking the upper and lower slotted slide bars to the nomogram base plate. The present invention can calculate cabin flooding and submersion time, as well as breach size using a known water inflow rate. Other parameters can be obtained using the slide rule based on any two parameters, facilitating damage control personnel to quickly complete ship cabin damage and flooding calculations and implement anti-sinking decisions.

Description

Technical Field

[0001] The present invention relates to the field of ship cabin water ingress calculation and damage control, and in particular to a fast-adjustable ship cabin water ingress information nomogram slide rule and a use method thereof. Background Art

[0002] Calculating the amount of water entering a ship's cabin is crucial information that must be immediately grasped when a ship is damaged and flooded. Water ingress-related parameters include breach location and depth, cabin area, liquid level rise rate, water ingress volume, and breach size. Ship damage control personnel need to use these parameters for rapid calculations to provide data support for anti-sinking decisions.

[0003] In the prior art, the acquisition of ship cabin water ingress information mainly includes the following three categories:

[0004] The first type is manual calculation using the cabin flooding calculation formula. Damage control personnel substitute the known cabin flooding parameters into the calculation formula, use a calculator to obtain the calculation results, and make damage control decisions.

[0005] The second type is to use computer-assisted calculation software for ship cabin flooding. Damage control personnel input the known cabin flooding parameters into the calculation software, quickly obtain the calculation results, and make damage control decisions.

[0006] The third type is manual calculation using the ship's unsinkability documents. Damage control personnel use pencils and rulers to check the diagrams and tables in the ship's unsinkability documents based on the known compartment and breach water ingress parameters, obtain the calculation results, and make damage control decisions.

[0007] In the process of realizing the present invention, the inventors found that the above-mentioned prior art has at least the following technical problems:

[0008] 1. In existing technologies, manual calculations involving formula substitution are time-consuming and computationally intensive, requiring high professional competence from damage control personnel and resulting in significant implementation difficulties.

[0009] 2. In existing technologies, using computing software to input data to assist decision-making is the most convenient. However, in hazardous environments, if the computing equipment cannot continue to operate, anti-sinking decisions will be affected.

[0010] 3. In the prior art, the results can be obtained by drawing directly on the ship unsinkability document using a pencil and ruler. However, there are many constraints on auxiliary tools such as drawings, pencils, rulers, erasers, etc., which sometimes limits the flexibility of the operation. Summary of the Invention

[0011] In view of this, the present invention provides a fast-adjustable ship cabin water ingress information nomogram slide rule and its use method. When a cabin damage and water ingress hazard occurs, damage control personnel use the slide rule to quickly calculate cabin damage and water ingress related parameters, and use them as data support for anti-sinking decision-making.

[0012] The technical solution adopted in the present invention is:

[0013] A fast-adjustable ship cabin flooding information nomogram slide rule, comprising:

[0014] A nomogram base plate for marking parameters related to damage and water ingress. The nomogram base plate has five parameter slots. From left to right, the first slot to the fifth slot are the slot for the depth parameter of the breach, the slot for the area parameter of the compartment, the slot for the speed of liquid level rise, the slot for the amount of water ingress, and the slot for the breach size parameter.

[0015] Limit bolts provided on each parameter channel;

[0016] The slotted slide bars are arranged on the upper and lower sides of the nomogram base plate, and the limit bolts pass through the slotted slide bar on the upper side, the parameter groove and the slotted slide bar on the lower side in sequence. The limit bolts are provided with a locking device for locking the slotted slide bars on the upper and lower sides to the nomogram base plate.

[0017] Furthermore, the locking device includes a stop washer and a nut, wherein the two stop washers are respectively located on the outside of the slotted slide rods on the upper and lower sides, the nut is located at the bottom end of the lower stop washer, and the limit bolt passes through the two stop washers and the nut. By rotating the nut, the slotted slide rods and the nomograph base plate on the upper and lower sides can be tightened through the stop washer.

[0018] Furthermore, the screw portion of the limit bolt includes an upper polished rod and a lower screw rod. The stop washer, the grooves of the slotted slide rods on the upper and lower sides, and the grooves on the nomograph bottom plate only contact the upper polished rod of the limit bolt; when the upper and lower slotted slide rods are loosened, the limit bolt and the stop washer can drive the limit bolt and the stop washer to move flexibly in their own grooves and parameter grooves; when the nut is tightened, the slotted slide rod, the limit bolt and the stop washer cannot move.

[0019] Furthermore, the first channel breach depth parameter H, the fourth channel water inflow parameter Q, and the fifth channel breach size parameter S conform to the collinear nomogram principle, and their relationship is expressed as follows:

[0020]

[0021] The fifth slot rupture size parameter S takes into account the influence of the rupture flow coefficient. When in use, if two slot variables are known, the limit bolts are locked at the corresponding variable scale points on the nomogram base plate according to the two slot variables. The intersection of the slide rod and the third parameter slot is the value of the third variable to be calculated.

[0022] Furthermore, the second channel compartment area parameter A, the third channel liquid level rising speed parameter ω, and the fourth channel water inflow parameter Q conform to the collinear nomogram principle, and their relationship is expressed as follows:

[0023] lg Q=lgω+lg A

[0024] When in use, if two slot variables are known, the limit bolts are locked at the corresponding variable scale points on the nomogram base plate according to the two slot variables, and the intersection of the slide bar and the third parameter slot is the value of the third variable to be sought.

[0025] Furthermore, the distance between the first and fourth grooves is a, the distance between the fourth and fifth grooves is b, and the groove length and groove length of the first groove breach position depth parameter H, the fourth groove water inflow parameter Q, and the fifth groove breach size parameter S are related as follows:

[0026]

[0027] Among them L H represents the first channel length, H max Indicates the maximum display scale of the depth parameter of the first groove rupture position, H min Indicates the minimum display scale of the depth parameter of the rupture position of the first groove. Indicates the first groove rupture position depth parameter scale coefficient, L S Indicates the length of the fifth groove, s max Indicates the maximum display scale of the 5th channel rupture size parameter, s min Indicates the minimum display scale of the 5th groove rupture size parameter. Indicates the scale coefficient of the 5th slot rupture dimension parameter. It represents the length of the fourth channel corresponding to any water inflow value, which can also be expressed as but Indicates the total length of the fourth groove.

[0028] Furthermore, the distance between the second channel and the third channel is c, and the distance between the third channel and the fourth channel is d. The channel length and the distance between the channels are related to the second channel compartment area parameter A, the third channel liquid level rising speed parameter ω, and the fourth channel water inflow parameter Q as follows:

[0029]

[0030] Among them L A Indicates the length of the second groove, A max Indicates the maximum display scale of the second channel compartment area parameter, A minIndicates the minimum display scale of the second channel cabin area parameter. Indicates the scale coefficient of the second channel cabin area parameter. It is worth noting that the maximum display scale of the second channel cabin area parameter is at the bottom and the minimum display scale is at the top. ω represents the length of the third channel, ω max Indicates the maximum display scale of the third channel liquid level rising speed parameter, ω min Indicates the minimum display scale of the third channel liquid level rising speed parameter. The coefficient of the parameter chart of the liquid level rising speed in the third channel is expressed as Indicates the scale coefficient adjustment value. It represents the length of the fourth channel corresponding to any water inflow value that conforms to the collinear nomogram principle and has the characteristics of lg Q = lgω + lg A, which can also be expressed as

[0031] Furthermore, the relationship between the maximum display scale and the minimum display scale on each groove of the slide rule is expressed as follows:

[0032]

[0033] L para＝x Indicates the slot length corresponding to the minimum display scale position from the middle scale of the parameter on any slot, X para Indicates the parameter display scale on any channel, X paramin Indicates the minimum display scale of any channel parameter, X paramax Indicates the maximum display scale of any channel parameter, L para Represents any channel length.

[0034] A method for using the above-mentioned rapid-adjustment ship cabin flooding information nomogram slide rule comprises the following steps:

[0035] S101, loosen the nuts on the five slot limit bolts of the slide rule;

[0036] S102, adjusting and tightening the limit bolts on the first input parameter channel according to calculation requirements;

[0037] S103, adjusting and tightening the limit bolts on the second input parameter channel according to calculation requirements;

[0038] S104, tighten the limit bolts and nuts on the slot for the parameter to be calculated and read the value;

[0039] S105: If the calculation result of step S104 is used for subsequent calculations, tighten the slot limit bolt for the fourth slot water inflow parameter. The calculation result is used as the first parameter for subsequent calculation tasks, and loosen the nuts on the remaining four slot limit bolts.

[0040] S106, adjusting and tightening the limit bolts on the second parameter slot of the subsequent calculation task according to the calculation requirements;

[0041] S107, tighten the limit bolts and nuts on the parameter slot to be calculated for the subsequent calculation task and read the values.

[0042] The present invention has the following technical effects or advantages:

[0043] 1. The technical solution of the present invention, based on the principle of nomograms, implements the complex process of calculating ship cabin damage and flooding through slide rule operation. This provides damage control personnel with a portable tool for cabin damage and flooding calculations, and also provides a backup method for implementing anti-sinking decisions in environments where electronic computers are unavailable.

[0044] 2. The technical solution of the present invention adopts a slide bar channel structure and introduces an adjustable bolt fixing method, which solves the problem of solving unknown quantities with arbitrary fixed parameters when variables are used iteratively in the multi-parameter calculation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a fast-adjustable ship cabin water inflow information nomogram slide rule according to the present invention;

[0046] Figure 2 It is an assembly drawing of one direction of the quick-adjustable ship cabin water inflow information nomogram slide rule of the present invention;

[0047] Figure 3 This is an assembly drawing of the other direction of the slide rule of the quick-adjustable ship cabin water inflow information nomogram of the present invention;

[0048] Figure 4 This is a quantitative relationship diagram of parameter channel dimensions in the slide rule of the fast-adjustable ship cabin water inflow information nomogram of the present invention;

[0049] Figure 5 The present invention is a flowchart of a method for using the fast-adjustable ship cabin water inflow information nomogram slide rule. DETAILED DESCRIPTION

[0050] The following describes embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. In addition, all embodiments and features in the embodiments of the present invention can be combined with each other if there is no conflict.

[0051] The calculation of the damage and water inflow condition of the ship plays a data supporting role in the anti-sinking decision-making. The calculation content involved includes calculating the instantaneous flow rate of water inflow into the cabin based on the depth of the damage location and the size of the breach, which is used to determine the correspondence between the cabin drainage rate and the breach water inflow rate; it also includes calculating the rate of liquid level rise in the cabin based on the instantaneous flow rate of water inflow into the cabin based on the damage and the cabin area, which is used to determine the feasibility of personnel implementing leak plugging operations when the cabin is flooded.

[0052] To address the problems existing in the prior art, such as the time-consuming and computationally intensive manual calculations required to substitute formulas into the calculation process for ship cabin damage and water ingress; the excessive reliance on electronic computers and other computing devices when using calculation software; and the numerous constraints and complex operation required for drawing with pencils and rulers. An embodiment of the present invention provides a fast-adjustable nomogram slide rule for ship cabin water ingress information. Based on the nomogram principle, the slide rule is designed to calculate cabin water ingress and flooding time, and can also calculate breach size using a known water ingress rate. The slide rule includes a nomogram base plate with damage and water ingress related parameters marked on it, with five grooves corresponding to the relevant damage and water ingress calculation parameters. It is equipped with a set of two upper and lower slotted slide bars fixed by limit bolts and can slide on the five grooves. Users can use the slide rule to calculate other parameters based on any two parameters, making it easy for damage control personnel to quickly complete ship cabin damage and water ingress calculations and implement anti-sinking decisions. It provides a portable tool for damage control personnel to implement cabin damage and water ingress calculations, and also provides a backup means for implementing anti-sinking decisions in environments where electronic computers cannot be used.

[0053] Please refer to Figure 1 , which is a structural schematic diagram of a fast-adjustable ship cabin water inflow information nomogram slide rule according to an embodiment of the present invention, comprising:

[0054] A nomogram base plate P01 for marking parameters related to water ingress. The nomogram base plate P01 has five parameter slots P02, which, from left to right, are the slots for the depth of the breach, the compartment area, the liquid level rise rate, the water inflow, and the breach size. The slot length must meet the dimensional requirements described in the previous patent, the width must match the limit bolts P03, and the depth must penetrate the base plate P01.

[0055] A limit bolt P03 is provided on each parameter channel P02;

[0056] The slotted slide bars P05 are provided on the upper and lower sides of the nomogram base plate P01, and the limit bolts P03 pass through the slotted slide bar P05 on the upper side, the parameter groove P02 and the slotted slide bar P05 on the lower side in sequence. The limit bolts P03 are provided with a locking device for locking the slotted slide bars P05 on the upper and lower sides to the nomogram base plate P01.

[0057] In this embodiment, the locking device includes a stop washer P04 and a nut P06 (see Figure 3 ), where two stop washers P04 are respectively located on the outside of the slotted slide bars P05 on the upper and lower sides, and the nut P06 is located at the bottom end of the lower stop washer P04. The limit bolt P03 passes through the two stop washers P04 and the nut P06. By turning the nut P06 clockwise, the slotted slide bars P05 and the Nomograph bottom plate P01 on the upper and lower sides can be pressed tightly through the stop washers P04.

[0058] like Figure 2 、 3 As shown, the upper section of the screw portion of the limit bolt P03 is a polished rod, while the lower section is a lead screw. The stop washer P04, the groove of the slotted slide rod P05, and the groove of the parameter groove P02 only contact the polished rod portion of the limit bolt P03. When the slotted slide rod P05 is loosened, it can move the limit bolt P03 and the stop washer P04 flexibly within its own groove and the groove of the parameter groove P02. When the P06 nut is tightened, the slotted slide rod P05, the limit bolt P03, and the stop washer P04 cannot move.

[0059] like Figure 4 As shown, the breach position depth parameter H marked by the first groove (breach position depth parameter groove), the water inflow parameter Q marked by the fourth groove (water inflow groove), and the breach size parameter S marked by the fifth groove (breach size parameter groove) of the nomogram base plate P01 conform to the collinear nomogram principle, and their quantitative relationship can be expressed as follows: S takes into account the influence of the breach discharge coefficient. The depth parameter H of the breach position of the first channel, the water inflow parameter Q of the fourth channel and the breach size parameter S of the fifth channel on the bottom plate of the calculation rule satisfy the channel length and the distance between the channels. Figure 4 The quantitative relationship shown can be expressed as L H represents the first channel length, H max Indicates the maximum display scale of the depth parameter of the first groove rupture position, H min Indicates the minimum display scale of the depth parameter of the first groove rupture position, a and b respectively represent Figure 4 The groove spacing shown, Indicates the first groove rupture position depth parameter scale coefficient, L S Indicates the length of the fifth groove, s max Indicates the maximum display scale of the 5th channel rupture size parameter, s mi n represents the minimum display scale of the 5th channel rupture size parameter, Indicates the scale coefficient of the 5th slot rupture dimension parameter. Indicates that it complies with the collinear nomogram principle and has The length of the fourth channel corresponding to any water inflow value of the characteristic can also be expressed as but Indicates the total length of the fourth groove.

[0060] Here, a case of using the present invention to design the lengths of the first, fourth, and fifth grooves is given, but it is not limited to this. If H min =0.5m, H max =6m,s min =0.001m 2 , s max =0.3m 2 ,but If a=15cm,b=5cm,L H =20cm, then according to L H and L S The characteristic relationship of L S =30.6cm, calculate L H and L S The scale coefficient is m H =37.06,m S =12.35, then L Q =27.95cm, corresponding to q min =0.09m 3 / min and q max =195.17m 3 / min, The scale coefficient can be obtained

[0061] like Figure 4 As shown, the cabin area parameter A marked by the second slot (liquid level rising speed parameter slot), the liquid level rising speed parameter ω marked by the third slot (liquid level rising speed parameter slot), and the water inflow parameter Q marked by the fourth slot (water inflow slot) on the nomogram base plate P01 comply with the collinear nomogram principle, and their quantitative relationship can be expressed as lg Q = lgω + lg A. The slot lengths and the distances between the slots of the cabin area parameter A of the second slot (cabin area parameter slot), the liquid level rising speed parameter v of the third slot (liquid level rising speed parameter slot), and the water inflow parameter Q of the fourth slot (water inflow slot) on the nomogram base plate P01 satisfy Figure 4 The quantitative relationship shown can be expressed as L A Indicates the length of the second groove, A max Indicates the maximum display scale of the second channel compartment area parameter, A min Indicates the minimum display scale of the second channel cabin area parameter. Indicates the scale coefficient of the second channel cabin area parameter. It is worth noting that the maximum display scale of the second channel cabin area parameter is at the bottom and the minimum display scale is at the top. ω represents the length of the third channel, ω max Indicates the maximum display scale of the third channel liquid level rising speed parameter, ω min Indicates the minimum display scale of the third channel liquid level rising speed parameter. The coefficient of the parameter chart of the liquid level rising speed in the third channel is expressed as Indicates the scale coefficient adjustment value. It represents the length of the fourth channel corresponding to any water inflow value that conforms to the collinear nomogram principle and has the characteristics of lg Q = lgω + lg A, which can also be expressed as

[0062] Here, a case of using the present invention to design the second, third, and fourth groove lengths is given, but it is not limited to this. If A min =10m 2 , A max =300m 2 , the value range of the water inlet parameter Q remains unchanged, q min =0.09m 3 / min,q max =195.17m 3 / min, then ω min =0.0003m / min,ω max =19.52m / min, if c=5cm, d=5cm, L A =10.0cm, then according to L A and L ω The characteristic relationship of L ω =18.73cm, calculate L A and L ω The scale coefficient is m A =7.77,m ω =3.91.

[0063] like Figure 4 As shown in the figure, the intermediate scale between the maximum display scale and the minimum display scale on each channel of the fast-adjustable ship cabin flooding information nomogram slide rule can be characterized as follows: L para＝x Indicates the slot length corresponding to the minimum display scale position from the middle scale of the parameter on any slot, X para Indicates the parameter display scale on any channel, X paramin Indicates the minimum display scale of any channel parameter, X paramax Indicates the maximum display scale of any channel parameter, L paraHere, we give an example of using the present invention to design the intermediate scale between the maximum display scale and the minimum display scale of the first channel rupture depth parameter H, but it is not limited to this. If a=15cm,b=5cm,L H =20cm, H min =0.5m, H max =6m, any breach depth H = 1.0m, then H = 1.0m scale distance minimum display scale H min = The channel length L corresponding to the position of 0.5m H＝1.0 =5.58cm.

[0064] Here, a calculation case of cabin damage and water inflow calculation using the present invention is given, but it is not limited to this. This case is to solve the cabin water inflow and cabin liquid level rising speed based on the known damage situation. Figure 1 For the structure shown, please refer to Figure 4 The geometric parameters and variable names of the slide rule groove are given according to Figure 5 The calculation process is given, and the specific calculation steps include:

[0065] S101, loosen the nuts on the 5 slot limit bolts of the slide rule. The 5 slots are, from left to right, the breach position depth parameter slot, the cabin area parameter slot, the liquid level rising speed parameter slot, the water inflow parameter slot, and the breach size parameter slot. Here, an example of the slot parameters of the fast-adjustable ship cabin water inflow information nomogram slide rule designed by the present invention is given, but it is not limited to this. Figure 4 As shown, the geometric parameters of the grooves of the slide rule are designed as follows: a = 15 cm, b = 5 cm, c = 5 cm, d = 5 cm, the groove length L is the depth parameter of the rupture position H =20cm, corresponding to the minimum display scale H min =0.5m, maximum display scale H max =6m; Cabin area parameter channel length L A =11.5cm corresponds to the minimum display scale A min =10m 2 ,, Maximum display scale A max =300m 2 ; Liquid level rising speed parameter channel length L ω =18.73cm corresponds to the minimum display scale ω min =0.0003m / min, maximum display scale ω max =19.52m / min; water inlet parameter channel length L Q =27.95cm corresponds to the minimum display scale q min =0.09m 3 / min, maximum display scale qmax =195.17m 3 / min; Break size parameter slot length L S =30.6cm corresponds to the minimum display scale s min =0.001m 2 , maximum display scale s max =0.3m 2 .

[0066] S102, adjust the limit bolts on the first input parameter channel according to the calculation requirements and tighten them. If the breach position depth parameter and breach size parameter are known, calculate the water inflow. At this time, it is assumed that the limit bolts on the first input parameter channel are locked corresponding to the first channel from left to right, that is, the breach position depth parameter channel. Here, an example of using the present invention to set the breach position depth parameter is given, but it is not limited to this. For example Figure 4 As shown, if the depth of the breach is known to be H = 1.5m below the waterline of the ship, slide the limit bolt on the first groove to the corresponding position of H = 1.5m on the groove and tighten the nut. The H = 1.5m scale on the first groove is the distance from the minimum display scale H min = The channel length L corresponding to the position of 0.5m H＝1.5 =8.84cm

[0067] S103, adjust the limit bolt on the second input parameter slot according to the calculation requirements and tighten it. Assume that the limit bolt on the second input parameter slot is locked corresponding to the fifth slot from left to right, that is, the gap size parameter slot. Here, an example of setting the gap size parameter using the present invention is given, but it is not limited to this. Figure 4 As shown, if the breach size parameter s = 0.0314m is known 2 , that is, a 0.2m diameter breach, slide the limit bolt on the 5th channel to the channel s=0.0314m 2 The corresponding position and locking nut, s = 0.0314m on the fifth groove 2 Scale distance minimum display scale s min =0.001m 2 The slot length L corresponding to the position s＝0.0314 =18.49cm.

[0068] S104, tighten the limit bolts and nuts on the parameter channel to be calculated and read the value. Assume that the parameter channel to be calculated corresponds to the 4th channel from left to right, that is, the water inflow parameter channel. According to the position of the limit bolt after being locked on the 4th channel at this time, the water inflow value is determined by reading. Here, an example of using the present invention to solve the water inflow parameter is given, but it is not limited to this. Figure 4As shown, if the scale distance H on the first channel is H=1.5m, the minimum display scale H min =0.5m position corresponding to the channel length is L H＝1.0 =8.84cm, s=0.0314m on the fifth channel 2 Scale distance minimum display scale s min =0.001m 2 The slot length L corresponding to the position s＝0.0314 =18.49cm, a=15cm, b=5cm, using the L H and L S The scale coefficient m H =37.06,m S =12.35, based on the principle of collinear nomogram The calculation formula obtained The position of the upper limit bolt of the fourth channel is the distance from the minimum display scale q min =0.09m 3 / min position corresponding to the groove length L Qx =16.08cm, the corresponding water inlet parameter slot display scale is q x =7.47m 3 / min.

[0069] Furthermore, according to the calculation formula of water inflow from hull breach If the breach depth is known to be below the waterline of the ship, H = 1.5m, the breach size parameter s = 0.0314m 2 , that is, a 0.2m diameter breach, the flow coefficient μ takes a value of 0.6-0.7, and the calculated result is 6.13m3 / min~7.15m3 / min. The result obtained by using the slide rule deviates from the result calculated by the formula by an error of 4.5%~21.8%. Taking into account the influence of the flow coefficient value, the above result meets the accuracy requirements.

[0070] S105, if the calculation result of step S104 is used for the subsequent calculation, then tighten the slot limit bolt of the fourth slot water inflow parameter, and the calculation result is used as the first parameter of the subsequent calculation task, and at the same time loosen the nuts on the remaining four slot limit bolts. Here, an example of setting the water inflow parameter using the present invention is given, but it is not limited to this. Figure 4 As shown, the first parameter of the subsequent calculation task is the water inflow parameter, and locking the calculation result means locking the limit bolt nut on the water inflow parameter slot of the fourth slot. The position of the limit bolt on the fourth slot is the distance from the minimum display scale q min =0.09m 3 / min position corresponding to the groove length The corresponding water inlet parameter channel display scale is qx =7.47m 3 / min.

[0071] S106, adjust and tighten the limit bolts on the second parameter channel of the subsequent calculation task according to the calculation requirements. If the water inflow parameter and the cabin area parameter are known, calculate the cabin liquid level rising speed parameter. At this time, the limit bolts on the second input parameter channel are locked corresponding to the second channel from left to right, that is, the cabin area parameter channel. Here, an example of using the present invention to set the cabin area parameter is given, but it is not limited to this. For example Figure 4 As shown, if the cabin area parameter A is known to be 100m 2 , slide the limit bolt on the second channel to the channel A = 100m 2 The corresponding position and locking nut, A = 100m on the second groove 2 Scale distance minimum display scale A min =10m 2 The slot length L corresponding to the position A＝100 =7.79cm.

[0072] S107, tighten the limit bolt nut on the parameter slot to be calculated for the subsequent calculation task and read the value. The parameter slot to be calculated for the subsequent calculation task corresponds to the third slot from left to right, that is, the liquid level rising speed parameter slot. According to the position of the limit bolt after being locked on the third slot at this time, the value of the liquid level rising speed parameter is determined by reading. Here, an example of using the present invention to solve the liquid level rising speed parameter is given, but it is not limited to this. Figure 4 As shown, if A=100m on the second channel 2 Scale distance minimum display scale A min =10m 2 The slot length L corresponding to the position A＝100 =7.79cm, q on the fourth groove x =7.47m 3 / min scale distance minimum display scale q min =0.09m 3 / min position corresponding to the groove length c = 5cm, d = 5cm, according to the principle of collinear nomogram, its characteristics can be expressed as lgQ x＝7.47 =lgω x +lgA x＝100 , which can also be expressed as lgω x =lgQ x＝7.47 -lgA x＝100 ,at this time Indicates the distance between the position of the upper limit bolt of the third channel and the minimum display scale ω min= The groove length L corresponding to the position of 0.0003m / min ωx =9.66cm, the corresponding liquid level rising speed parameter slot display scale is ω x =0.091m / min.

[0073] Furthermore, according to the calculation formula of the water level rise in the cabin ω=Q / (λA), if the water inflow parameter is known to be q x =7.47m 3 / min, cabin area A = 100m 2 Considering the cabin filling volume coefficient λ = 0.7 ~ 0.97, the calculation result of the liquid level rising speed parameter formula is 0.077m / min ~ 0.106m / min. The result obtained by using the slide rule is within the range of the calculation results of the formula.

[0074] Here, another calculation case of using the present invention to implement the calculation of cabin damage and water inflow is given, but it is not limited to this. This case solves the breach size parameters based on the known breach location depth of the flooded cabin and the rising speed of the water level in the breach. Figure 1 For the structure shown, please refer to Figure 4 The geometric parameters and variable names of the slide rule groove are given according to Figure 5 The calculation process is given, and the specific calculation steps include:

[0075] S101, loosen the nuts on the 5 slot limit bolts. The 5 slots are, from left to right, the breach position depth parameter slot, the cabin area parameter slot, the liquid level rising speed parameter slot, the water inflow amount slot, and the breach size parameter slot. Here, an example of the slot parameters of the fast-adjustable ship cabin water inflow information nomogram slide rule designed by the present invention is given, but it is not limited to this. Figure 4 As shown, the geometric parameters of the grooves of the slide rule are designed as follows: a = 15 cm, b = 5 cm, c = 5 cm, d = 5 cm, the groove length L is the depth parameter of the rupture position H =20cm, corresponding to the minimum display scale H min =0.5m, maximum display scale H max =6m; Cabin area parameter channel length L A =11.5cm corresponds to the minimum display scale A min =10m 2 ,, Maximum display scale A max =300m 2 ; Liquid level rising speed parameter channel length L ω =18.73cm corresponds to the minimum display scale ω min =0.0003m / min, maximum display scale ω max =19.52m / min; water inlet parameter channel length LQ =27.95cm corresponds to the minimum display scale q min =0.09m 3 / min, maximum display scale q max =195.17m 3 / min; Break size parameter slot length L S =30.6cm corresponds to the minimum display scale s min =0.001m 2 , maximum display scale s max =0.3m 2 .

[0076] S102, adjust the limit bolts on the first input parameter channel and tighten them according to the calculation requirements. If the breach depth, liquid level rising speed and the area of ​​the damaged compartment are known, calculate the breach size parameters. At this time, tightening the limit bolts on the first input parameter channel corresponds to the second channel from left to right, that is, the compartment area parameter channel. Here, an example of using the present invention to set the compartment area parameter is given, but it is not limited to this. For example Figure 4 As shown, if the cabin area parameter A is known to be 50m 2 , slide the limit bolt on the second channel to the channel A = 50m 2 The corresponding position and locking nut, A = 50m on the second groove 2 Scale distance minimum display scale A min =10m 2 The slot length L corresponding to the position A＝50 =5.44cm

[0077] S103, adjust the limit bolt on the second input parameter channel according to the calculation requirements and tighten it. The limit bolt on the second input parameter channel corresponds to the third channel from left to right, that is, the liquid level rising speed parameter channel. Here, an example of setting the liquid level rising speed parameter using the present invention is given, but it is not limited to this. Figure 4 As shown, if the liquid level rising speed ω=0.09m / min is known, slide the limit bolt on the third groove to the corresponding position of ω=0.09m / min on the groove and tighten the nut. The ω=0.09m / min scale on the third groove is ω=0.09m / min away from the minimum display scale ω min = The groove length L corresponding to the position of 0.0003m / min ω＝0.09 =9.64cm

[0078] S104, tighten the limit bolts and nuts on the parameter channel to be calculated and read the value. The parameter channel to be calculated corresponds to the 4th channel from left to right, that is, the water inflow parameter channel. According to the position of the limit bolt after being locked on the 4th channel at this time, the water inflow value is determined by reading. It is worth noting that the water inflow value is a related parameter for the calculation of water inflow due to cabin damage. Here, an example of using the present invention to solve the water inflow parameter is given, but it is not limited to this. For example Figure 4 As shown, if A=50m on the second channel 2 Scale distance minimum display scale A min =10m 2 The slot length L corresponding to the position A＝50 =5.44cm, the scale distance on the third groove is ω=0.09m / min, the minimum display scale ω min = The groove length L corresponding to the position of 0.0003m / min ω＝0.09 =9.64cm, c=5cm, d=5cm, according to the principle of collinear nomogram, its characteristics can be expressed as lgQ x =lgω x＝0.09 +lgA x＝50 ,at this time Indicates the distance between the position of the upper limit bolt of the fourth channel and the minimum display scale q min =0.09m 3 / min position corresponding to the groove length The corresponding water inlet parameter channel display scale is q x =4.495m 3 / min.

[0079] S105, if the calculation result of step S104 is used for the subsequent calculation, then tighten the slot limit bolt of the fourth slot water inflow parameter, and the calculation result is used as the first parameter of the subsequent calculation task, and at the same time loosen the nuts on the remaining four slot limit bolts. Here, an example of setting the water inflow parameter using the present invention is given, but it is not limited to this. Figure 4 As shown, the first parameter of the subsequent calculation task is the water inflow parameter, and locking the calculation result means locking the limit bolt nut on the water inflow parameter slot of the fourth slot. The position of the limit bolt on the fourth slot is the distance from the minimum display scale q min =0.09m 3 / min position corresponding to the groove length The corresponding water inlet parameter channel display scale is q x =4.495m 3 / min.

[0080] S106, adjust the limit bolts on the second parameter channel of the subsequent calculation task according to the calculation requirements and tighten them. If the breach position depth parameter and the water inflow parameter are known, calculate the cabin breach size parameter. At this time, the limit bolts on the second input parameter channel are locked corresponding to the first channel from left to right, that is, the breach position depth parameter channel. Here, an example of using the present invention to set the breach position depth parameter is given, but it is not limited to this. For example Figure 4 As shown, if the depth parameter of the breach position H = 1.0m is known, slide the limit bolt on the first groove to the position corresponding to H = 1.0m on the groove and tighten the nut. The H = 1.0m scale on the first groove is the smallest display scale H min = The channel length L corresponding to the position of 0.5m H＝1.0 =5.58cm.

[0081] S107, tighten the limit bolt nut on the parameter slot for the subsequent calculation task and read the value. The parameter slot for the subsequent calculation task corresponds to the 5th slot from left to right, that is, the rupture size parameter slot. According to the position of the limit bolt after being locked on the 5th slot at this time, read the value of the rupture size parameter. Here, an example of using the present invention to solve the rupture size parameter is given, but it is not limited to this. Figure 4 As shown, if the scale distance H on the first channel is H=1.0m, the minimum display scale H min = The channel length L corresponding to the position of 0.5m H＝1.0 =5.58cm, q on the fourth groove x =4.495m 3 / min scale distance minimum display scale q min =0.09m 3 / min position corresponding to the groove length a=15cm,b=5cm,according to the principle of collinear nomogram, its characteristics can be expressed as:

[0082]

[0083] It can also be expressed as:

[0084] at this time:

[0085]

[0086] Indicates the distance between the position of the upper limit bolt of the fifth channel and the minimum display scale s min =0.001m 2 The slot length L corresponding to the position Sx =11.48cm, the corresponding liquid level rising speed parameter slot display scale is s x =0.01m2 .

[0087] Furthermore, according to the calculation formula of water inflow from hull breach If the breach depth is known to be below the waterline of the ship, H = 1.0 m, the breach size parameter s x =0.01m 2 , where s x Taking into account the influence of the flow coefficient μ value of 0.6-0.7, the corrected calculation result is 2.81m3 / min~2.86m3 / min. The result q is obtained by using the slide rule x =4.495m 3 / minAfter considering the influence of the flow coefficient μ value of 0.6-0.7, the actual estimated breach flow is 2.70m3 / min~3.15m3 / min. The error between the above calculation result and the formula calculation result is -4%~+10.1%. Taking into account the influence of the flow coefficient value, the above result meets the accuracy requirements.

[0088] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by technicians in this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

Claims

1. A fast-adjustable ship cabin flooding information nomogram slide rule, characterized in that: include: A nomogram base plate for marking parameters related to damage and water ingress. The nomogram base plate has five parameter slots. From left to right, the first slot to the fifth slot are the slot for the depth parameter of the breach, the slot for the area parameter of the compartment, the slot for the speed of liquid level rise, the slot for the amount of water ingress, and the slot for the breach size parameter. Limit bolts provided on each parameter channel; The slotted slide bars are provided on the upper and lower sides of the nomogram base plate, and the limit bolts pass through the slotted slide bar on the upper side, the parameter groove and the slotted slide bar on the lower side in sequence. The limit bolts are provided with locking devices for locking the slotted slide bars on the upper and lower sides to the nomogram base plate; The first channel breach depth parameter H, the fourth channel water inflow parameter Q, and the fifth channel breach size parameter S conform to the collinear nomogram principle, and their relationship is expressed as follows: ； The fifth slot breach dimension parameter S takes into account the influence of the breach flow coefficient. When used, if two slot variables are known, the limit bolts are locked at the corresponding variable scale points on the nomogram base plate according to the two slot variables. The intersection of the slide bar and the third parameter slot is the value of the third variable to be calculated. The distance between the first and fourth grooves is a, and the distance between the fourth and fifth grooves is b. The relationship between the groove length and the grooves is as follows: ； in represents the first groove length, Indicates the maximum display scale of the depth parameter of the rupture position of the first groove. Indicates the minimum display scale of the depth parameter of the rupture position of the first groove. Indicates the first groove rupture position depth parameter scale coefficient, represents the length of the fifth groove, Indicates the maximum display scale of the 5th channel rupture size parameter. Indicates the minimum display scale of the 5th groove rupture size parameter. Indicates the scale coefficient of the 5th slot rupture dimension parameter. It represents the length of the fourth channel corresponding to any water inflow value, which can also be expressed as ,but Indicates the total length of the fourth groove.

2. The fast-adjustable ship cabin flooding information nomogram slide rule according to claim 1, characterized in that: The locking device includes a stop washer and a nut, wherein the two stop washers are respectively located on the outside of the slotted slide rods on the upper and lower sides, and the nut is located at the bottom end of the lower stop washer. The limit bolt passes through the two stop washers and the nut. By rotating the nut, the slotted slide rods and the nomograph bottom plate on the upper and lower sides can be tightened through the stop washer.

3. The fast-adjustable ship cabin flooding information nomogram slide rule according to claim 2, characterized in that: The screw portion of the limit bolt includes an upper polished rod and a lower screw rod. The stop washer, the grooves of the slotted slide bars on the upper and lower sides, and the groove on the nomogram bottom plate only contact the upper polished rod of the limit bolt. When the upper and lower slotted slide bars are loosened, the limit bolt and the stop washer can be driven to move flexibly in their own grooves and the parameter grooves. When the nut is tightened, the slotted slide bar, the limit bolt and the stop washer cannot move.

4. The fast-adjustable ship cabin flooding information nomogram slide rule according to claim 1, characterized in that: The second channel compartment area parameter A, the third channel liquid level rising speed parameter The water inflow parameter Q of the fourth channel conforms to the collinear nomogram principle, and the relationship is expressed as follows: ； When in use, if two slot variables are known, the limit bolts are locked at the corresponding variable scale points on the nomogram base plate according to the two slot variables, and the intersection of the slide bar and the third parameter slot is the value of the third variable to be sought.

5. The fast-adjustable ship cabin flooding information nomogram slide rule according to claim 1, characterized in that: The distance between the second and third channels is c, the distance between the third and fourth channels is d, the second channel compartment area parameter A, the third channel liquid level rising speed parameter The relationship between the channel length and the distance between channels and the fourth channel water inflow parameter Q is as follows: ； in represents the second groove length, Indicates the maximum display scale of the second channel cabin area parameter. Indicates the minimum display scale of the second channel cabin area parameter. Indicates the scale coefficient of the second channel cabin area parameter. It is worth noting that the maximum display scale of the second channel cabin area parameter is at the bottom and the minimum display scale is at the top. represents the length of the third groove, Indicates the maximum display scale of the third channel liquid level rising speed parameter. Indicates the minimum display scale of the third channel liquid level rising speed parameter. The coefficient of the parameter chart of the liquid level rising speed in the third channel is expressed as Indicates the scale coefficient adjustment value. Indicates that it complies with the collinear nomogram principle and has The length of the fourth channel corresponding to any water inflow value of the characteristic can also be expressed as .

6. The fast-adjustable ship cabin flooding information nomogram slide rule according to claim 1, characterized in that: The relationship between the maximum and minimum scales on each groove of the slide rule is expressed as follows: ； Indicates the slot length corresponding to the distance between the middle scale mark and the minimum display scale mark on any slot. Indicates the parameter display scale on any channel. Indicates the minimum display scale of any channel parameter. Indicates the maximum display scale of any channel parameter. Represents any channel length.

7. A method for using a fast-adjustable ship cabin flooding information nomogram slide rule, characterized in that: The method is applied to the fast-adjustable ship cabin water inflow information nomogram slide rule according to any one of claims 1 to 6, and the method comprises the following steps: S101, loosen the nuts on the five slot limit bolts of the slide rule; S102, adjusting and tightening the limit bolts on the first input parameter channel according to calculation requirements; S103, adjusting and tightening the limit bolts on the second input parameter channel according to calculation requirements; S104, tighten the limit bolts and nuts on the parameter channel to be calculated and read the water inflow value; S105: If the calculation result of step S104 is used for subsequent calculations, tighten the slot limit bolt for the fourth slot water inflow parameter. The calculation result is used as the first parameter for subsequent calculation tasks, and loosen the nuts on the remaining four slot limit bolts. S106, adjusting and tightening the limit bolts on the second parameter slot of the subsequent calculation task according to the calculation requirements; S107, tighten the limit bolts and nuts on the parameter channel to be calculated for the subsequent calculation task and read the value to determine the liquid level rising speed parameter.

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