Disclosure of Invention
In order to solve the technical defect that the tearing of the opening edge of the swash plate is caused by the stress peak value generated by the stress concentration of the opening of the swash plate in the prior art, the invention provides the swash plate for the liquid tank body, solves the problem that the stress peak value is generated by the stress concentration of the opening of the swash plate, effectively prevents the tearing of the opening edge of the swash plate, also solves the problem of the length of a welding seam between the swash plate and the tank body, effectively improves the self strength of the swash plate, and improves the service life, the safety and the reliability of the swash plate during use.
The invention is realized by the following technical scheme:
the utility model provides a swash plate for liquid tank body, includes plate body and impact control device, open one side of the vertical central line of plate body has the access hole that supplies the maintainer to pass through, open the upper end of plate body has the air vent, and open the left and right sides symmetry of plate body has the side hole, the lower extreme of plate body is provided with the omega shape liquid passing port that link up around one, impact control device sets up in the plate body inside.
Beneficially, the plate body is a metal flat plate, and at least three metal rib plates are fixedly arranged on the edges of the access hole, the side hole and the vent hole of the plate body respectively.
Beneficially, the impact control system comprises an impact space located inside a plate body, a communicating port is formed in each of inner walls of the front end and the rear end of the impact space, the communicating port is communicated with the impact space and an external space, a circular impact plate is symmetrically arranged on each of the front side and the rear side inside the impact space, an annular outer wall of the impact plate is in sealing fit with an annular inner wall of the impact space, a compression space is arranged inside a left end wall of the impact space, a communicating hole is formed in a right end wall of the compression space, the communicating hole is communicated with the compression space and the impact space, a circular sealing plate is arranged on the right side inside the compression space, an annular outer wall of the circular sealing plate is in sealing fit with an annular inner wall of the compression space, a left end face of the circular sealing plate is abutted against a left end wall of the compression space through a spring, and a telescopic rod extending leftwards is arranged at the central position of the left end face of the circular sealing plate, a transmission space is arranged in the left end wall of the compression space, the left end of the telescopic rod penetrates through the left end wall of the compression space and extends into the transmission space, the left end of the telescopic rod is connected with a swinging rod which extends to the lower right side in a shaft connection mode, the lower end of the swinging rod is connected with a lifting rod which extends downwards in a shaft connection mode, a sealing space is arranged in the lower end wall of the transmission space, the lower end of the sealing space is communicated with the liquid through port, a limiting hole in the vertical direction is arranged on the right side of the lower end wall of the transmission space, the limiting hole is communicated with the transmission space and the sealing space, the lower end of the lifting rod penetrates through the limiting hole to enter the sealing space and is fixedly connected with a square sealing plate, the upper end face of the square sealing plate is abutted against the upper end wall of the sealing space through an elastic component, and the lower end of the square sealing plate is fixedly connected with a baffle plate, the lower end of the baffle penetrates out of the sealing space and is positioned in the liquid through port.
Preferably, an annular groove is formed in the annular end face of the impact plate, an annular sealing ring is installed in the annular groove, and the annular sealing ring is made of rubber.
As preferred, both sides symmetry is provided with an annular limiting plate around the inside intermediate position in impact space, the inner wall fixed connection in limiting plate and impact space, the intercommunication department in intercommunication and impact space is located the middle part of the centre gripping of both sides limiting plate in the front and back, impact space right end wall is provided with the notes liquid hole that extends right in the middle part department intercommunication of the centre gripping of both sides limiting plate in the front and back, the right side of annotating the liquid hole extends backward and communicates external space, the inside of annotating the liquid hole is provided with the hydrovalve.
Preferably, the outer wall of the circular sealing plate is in sealing fit with the inner wall of the compression space, the outer wall of the square sealing plate is in sealing fit with the inner wall of the sealing space, the left end face of the circular sealing plate is abutted to the left end wall of the compression space through a spring, the upper end face of the square sealing plate is abutted to the upper end wall of the sealing space through an elastic component, the elastic component and the spring are in a compression state, and the sum of the elastic force is equal to the pressure applied to the circular sealing plate by hydraulic oil in the impact space.
More preferably, the left end of the telescopic rod is connected with a swinging rod extending to the lower right side in a shaft coupling mode, the lower end of the swinging rod is connected with a lifting rod extending downwards in a shaft coupling mode, and the lower end of the lifting rod penetrates through the limiting hole to enter the sealing space and is fixedly connected with a square sealing plate.
The invention has the beneficial effects that: a wave guard plate for a liquid tank body is characterized in that before the wave guard plate is used, a hydraulic valve is opened, hydraulic oil is injected into an impact space through a liquid injection hole, under a normal state, a round sealing plate is kept to be positioned on the right side of a compression space through the elastic force of an elastic component and a spring, a square sealing plate is positioned on the lower side of the sealing space, the lower end of a baffle plate is positioned in a liquid through hole, when the impact force applied to the impact plate is reduced, the lower ends of the square sealing plate and a square sealing plate reset baffle plate are positioned in the liquid through hole through the elastic force of the elastic component and the spring, the partial caliber of the liquid through hole is shielded through the baffle plate, more impact force generated in the flowing of liquid is concentrated on the wave guard plate, the box body of a buffer tank is subjected to strong surge generated impact force due to the conditions of sudden braking and the like when the liquid is transported, the sealing performance of the impact plate and the inner wall of the impact space is ensured through an annular sealing ring, and the liquid in the liquid tank is prevented from being mixed into the impact space, meanwhile, the impact force received by the impact plate is consistent with the impact force received by the plate body, so that the liquid passing condition of the liquid passing port can be conveniently adjusted automatically according to the impact force received by the plate body, when the impact force received by the plate body is larger than the bearing range of the swash plate, the liquid passing caliber of the liquid passing port is properly increased, part of the impact force is shared on the tank body of the liquid tank, and the use safety of the swash plate is ensured. During the use, strike the board through left side or right side and the liquid contact in the fluid reservoir, when the strike board receives the impact, the strike board moves to inside, compress inside hydraulic oil, promote circular closing plate and remove left through hydraulic oil, and the effect of limiting plate prevents that the strike board from excessively moving, avoid the intercommunicating pore and annotate the liquid hole and pass through impact space and exterior space intercommunication, guarantee the steady operation of device, the effectual breakwater access hole of having solved, the air vent, side hole edge stress concentrates and makes its take place torn problem, the impact breakwater has been solved because of liquid surges, produce the situation that static leads to the explosion on its surface friction, the problem that breakwater and box welding seam length are not enough has also been solved, the effectual problem of breakwater velocity of having solved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
According to the invention, as shown in fig. 1 and 2, the wave guard for the liquid tank body comprises a plate body 1 and an impact control device 10, wherein one side of the longitudinal center line of the plate body is provided with an access hole 2 for passing of an inspector, the upper end of the plate body 1 is provided with a vent hole 3, the left side and the right side of the plate body are symmetrically provided with side holes 4, the lower end of the plate body 1 is provided with an omega-shaped liquid through hole 5 which is communicated from front to back, and the impact control device 10 is arranged in the plate body 1 and used for controlling the closing state of the liquid through hole 5 according to the impact force.
In a preferred embodiment, the plate body 1 is a metal flat plate, one side of the longitudinal center line of the plate body 1 is provided with an access hole 2 for passing of an access person, the upper end of the plate body 1 is provided with a vent hole 3, the left side and the right side of the plate body 1 are symmetrically provided with side holes 4, the lower end of the plate body 1 is provided with an omega-shaped liquid through port 5 which is through from front to back, and at least three metal rib plates 6 are fixedly arranged on the access hole 2, the side holes 4 and the opening edges of the vent hole 3 of the plate body 1 respectively. In the operation process of a large-scale tank truck, the liquid in the tank body surges due to road conditions and other reasons, the surged liquid can be subjected to the resistance of the plate body 1 to reduce the impact force on the tank body, the liquid can pass through the access hole 2, the side hole 4 and the liquid flow hole 3 of the plate body 1, the gas generated inside can flow through the vent hole 3 to ensure the pressure balance in the two cavities of the tank body separated by the plate body 1, the deformation of the wave guard plate and the damage of the tank body caused by the unbalanced pressure are effectively prevented, the opening of the omega-shaped liquid through hole 5 is small, the problem that the length of the welding line between the plate body 1 and the tank is insufficient is solved, the strength of the plate body 1 is improved, the rib plate 6 on the plate body 1 disperses the stress when the liquid passes through the access hole 2 and the side hole 4, the tearing condition of the edges of the access hole 2 and the side hole 4 is effectively prevented, and the liquid in the tank body surges continuously due to the instability of the tank body in the operation process, static electricity is generated due to friction when the plate body 1 is impacted, and if flammable and explosive liquid is filled in the tank body, the tank body is easy to explode, so that the surface of the plate body 1 is coated with the anti-static coating, and the generation of the static electricity is effectively prevented.
In a more preferred embodiment, the difference is that the plate body 1 is a metal flat plate, one side of the longitudinal central line of the plate body 1 is provided with an access hole 2 for passing of an inspection person, the upper end of the plate body 1 is provided with a vent hole 3, the left side and the right side of the plate body 1 are symmetrically provided with side holes 4, the lower end of the plate body 1 is provided with an omega-shaped liquid through port 5 which is through from front to back, and the opening edges of the access hole 2, the side holes 4 and the vent hole 3 of the plate body 1 are respectively provided with at least three metal rib plates 6 in a detachable mode. The rib plate 6 plays a role in stress dispersion in the swash plate, so the rib plate is easy to damage, if the rib plate 6 is fixedly connected with the swash plate, the plate body 1 needs to be integrally replaced if the rib plate 6 is damaged, the use cost is increased, therefore, the rib plate 6 and the swash plate are detachably connected, when the rib plate 6 is damaged, only the damaged rib plate 6 can be replaced, the use cost is simply and quickly reduced, in the operation process of a large-scale liquid tank truck, liquid in the tank body surges due to road conditions and the like, the surged liquid can be subjected to the resistance of the plate body 1 to slow down the impact force on the tank body, the liquid can pass through the maintenance opening 2, the side hole 4 and the liquid flow hole 3 of the plate body 1, the gas generated inside circulates through the vent hole 3 to ensure the pressure balance in two cavities of the tank body separated by the plate body 1, and the deformation and even the damage of the tank body due to unbalanced pressure are effectively prevented, the omega-shaped liquid through opening 5 is small in opening, the problem that the length of a welding seam between the plate body 1 and a tank is not enough is solved, the strength of the plate body 1 is improved, the stress is dispersed when liquid passes through the access hole 2 and the side hole 4 by the rib plate 6 on the plate body 1, and the condition that the edges of the access hole 2 and the side hole 4 are torn is effectively prevented. Because of the instability of the tank body in the operation process, the liquid in the tank body continuously surges, static electricity is generated due to friction when impacting the plate body 1, if flammable and explosive liquid is in the tank body, the tank body is easy to explode, and therefore the surface of the plate body 1 is coated with the anti-static coating, and the generation of the static electricity is effectively prevented.
In another preferred embodiment, the plate body 1 is a corrugated metal plate, one side of the longitudinal center line of the plate body 1 is provided with an access hole 2 for passing through by an inspector, the upper end of the plate body 1 is provided with an air vent 3, the left side and the right side of the plate body 1 are symmetrically provided with side holes 4, the lower end of the plate body 1 is provided with an omega-shaped liquid through hole 5 which is through from front to back, and the opening edges of the access hole 2, the side holes 4 and the air vent 3 of the plate body 1 are respectively and fixedly provided with at least three metal rib plates 6. The plate body 1 is a corrugated plate, so that the contact area between the plate body and liquid in the tank body can be increased, the impact force generated by the surge of the liquid in the tank body is effectively reduced, and the stress is dispersed. In the operation process of a large-scale tank truck, liquid in the tank body surges due to road conditions and other reasons, the surged liquid can be subjected to the resistance of the plate body 1 to slow down the impact force on the tank body, the liquid can pass through the access hole 2, the side hole 4 and the liquid flow hole 3 of the plate body 1, the internally generated gas can flow through the vent hole 3 to ensure the pressure balance in two cavities of the tank body separated by the plate body 1, the deformation of the swash plate and the damage of the tank body caused by the unbalanced pressure are effectively prevented, the opening of the omega-shaped liquid flow hole 5 is small, the problem that the length of the welding line between the plate body 1 and the tank body is insufficient is solved, the strength of the plate body 1 is improved, the rib plates 6 on the plate body 1 disperse stress when the liquid passes through the access hole 2 and the side hole 4, the tearing condition of the edges of the access hole 2 and the side hole 4 is effectively prevented, and the liquid in the tank body continuously surges due to the instability of the tank body in the operation process, static electricity is generated due to friction when the plate body 1 is impacted, and if flammable and explosive liquid is filled in the tank body, the tank body is easy to explode, so that the surface of the plate body 1 is coated with the anti-static coating, and the generation of the static electricity is effectively prevented.
In a more preferred embodiment, the difference is that the plate body 1 is a corrugated composite material, one side of the longitudinal center line of the plate body 1 is provided with an access hole 2 for passing of an access man, the upper end of the plate body 1 is provided with a vent hole 3, the left side and the right side of the plate body 1 are symmetrically provided with side holes 4, the lower end of the plate body 1 is provided with an omega-shaped liquid through port 5 which is through from front to back, and the opening edges of the access hole 2, the side holes 4 and the vent hole 3 of the plate body 1 are respectively provided with at least three composite material rib plates 6 in a detachable manner. The plate body 1 is made of composite materials, the dead weight of the swash plate is effectively reduced, the plate body 1 made of the composite materials can prevent liquid in the tank body from being corroded, the service life of the swash plate is prolonged, the rib plate 6 plays a role in dispersing stress in the swash plate and is easy to damage, if the rib plate 6 is fixedly connected with the plate body 1, the plate body 1 needs to be integrally replaced if the rib plate 6 is damaged, and the use cost is increased, so that the rib plate 6 and the swash plate are detachably connected, when the rib plate 6 is damaged, only the damaged rib plate 6 can be replaced, the use cost is effectively reduced, liquid in the tank body surges due to road conditions and other reasons in the operation process of a large-scale tank truck, the rushed liquid can be subjected to the resistance of the plate body 1 to slow down the impact force on the tank body, the liquid can pass through the inspection hole 2, the side hole 4 and the liquid flow hole 3 of the plate body 1, and gas generated inside can circulate through the vent hole 3 to ensure that the pressure in two separated tank bodies of the plate body 1 is balanced, the baffle that has effectually prevented to lead to because of pressure imbalance is out of shape even the box damages, and 5 openings on omega shape liquid passing hole are little, have solved plate body 1 and jar welding seam not enough problem of length, improve plate body 1's intensity. The gusset 6 on the plate body 1 disperses stress when liquid passes through the access hole 2 and the side hole 4, effectively preventing the condition that the edge of the access hole 2 and the side hole 4 are torn, and the instability of the tank body in the operation process enables the liquid in the tank body to continuously surge, so that the plate body 1 is impacted, static electricity is generated due to friction, if the liquid in the tank body is inflammable and explosive, explosion is easy to occur, so that an anti-static coating is coated on the surface of the plate body 1, and the generation of the static electricity is effectively prevented.
As shown in fig. 3-5, the impact control system 10 includes an impact space 11 located inside a plate body 1, a communication port 12 is provided on inner walls of front and rear ends of the impact space 11, the communication port 12 communicates the impact space 11 with an external space, a circular impact plate 13 is symmetrically provided on front and rear sides inside the impact space 11, an annular outer wall of the impact plate 13 is in sealing fit with an annular inner wall of the impact space 11, a compression space 14 is provided inside a left end wall of the impact space 11, a communication hole 15 is provided at a right end wall of the compression space 14, the communication hole 15 communicates the compression space 14 with the impact space 11, a circular sealing plate 16 is provided on a right side inside the compression space 14, an annular outer wall of the circular sealing plate 16 is in sealing fit with an annular inner wall of the compression space 14, a left end face of the circular sealing plate 16 abuts against the left end wall of the compression space 14 through a spring 17, a telescopic rod 18 extending leftwards is arranged at the center of the left end face of the circular sealing plate 16, a transmission space 19 is arranged inside the left end wall of the compression space 14, the left end of the telescopic rod 18 penetrates through the left end wall of the compression space 14 and extends into the transmission space 19, the left end of the telescopic rod 18 is connected with a swinging rod 20 extending rightwards and downwards in a shaft connection mode, the lower end of the swinging rod 20 is connected with a lifting rod 21 extending downwards in a shaft connection mode, a sealing space 22 is arranged inside the lower end wall of the transmission space 19, the lower end of the sealing space 22 is communicated with a liquid through port, a limit hole 23 in the vertical direction is arranged on the right side of the lower end wall of the transmission space 19, the limit hole 23 is communicated with the transmission space 19 and the sealing space 22, the lower end of the lifting rod 21 penetrates through the limit hole 23 to enter the sealing space 22 and is fixedly connected with a square sealing plate 24, the upper end face of the square sealing plate 24 is abutted against the upper end wall of the sealing space 22 through an elastic component 25, the lower end of the square sealing plate 24 is fixedly connected with a baffle plate 26, and the lower end of the baffle plate 26 penetrates out of the sealing space 22 and is positioned in the liquid through port 5. Under normal conditions, the lower extreme of baffle is located logical liquid mouth, shelters from the partial bore of leading to liquid mouth through the baffle, reduces the liquid throughput of leading to liquid mouth, concentrates on the wave breaker more of impulsive force that produces in the flow of liquid, and the buffer tank case box leads to the impact force that liquid surges and produce because of circumstances such as emergency brake when shipment liquid.
As shown in fig. 6, an annular groove 30 is provided at the annular end face of the impact plate 13, an annular seal ring 31 is installed in the annular groove 30, the annular seal ring 31 is made of rubber, the sealing performance between the impact plate 13 and the inner wall of the impact space 11 is ensured by the annular seal ring 31, the liquid in the liquid tank is prevented from mixing into the impact space, meanwhile, the impact force received by the impact plate 13 is consistent with the impact force received by the plate body 1, the liquid passing condition of the liquid passing port 5 is conveniently adjusted automatically according to the impact force received by the plate body 1, when the impact force received by the plate body 1 is larger than the bearing range of the wave guard, the liquid passing caliber of the liquid passing port 5 is properly increased, part of the impact force is shared on the tank body of the liquid tank, and the use safety of the wave guard is ensured.
In a preferred embodiment, both sides symmetry is provided with an annular limiting plate 27 around the intermediate position inside impact space 11, limiting plate 27 and the inner wall fixed connection of impact space 11, the intercommunication 15 is located the middle part of both sides limiting plate 27 centre gripping around with the intercommunication of impact space 11, impact space 11 right end wall is provided with the notes liquid hole 28 that extends to the right side in the middle part intercommunication of both sides limiting plate 27 centre gripping around, the right side of annotating liquid hole 28 extends backward and communicates external space, the inside of annotating liquid hole 28 is provided with hydraulic valve 29. Before using, open the hydrovalve, through annotating the liquid hole and annotating hydraulic oil in the impact space, during the use, through the impingement plate on left side or right side and the liquid contact in the fluid reservoir, when the impingement plate received the impact, the impingement plate moved to inside, compress inside hydraulic oil, promote circular closing plate and move left through hydraulic oil, and the effect of limiting plate prevents that the impingement plate from excessively moving, avoids the intercommunicating pore and annotates liquid hole 28 and through impact space and exterior space intercommunication, guarantees the steady operation of device.
In a preferred embodiment, the outer wall of the circular sealing plate 16 is in sealing fit with the inner wall of the compression space 14, the outer wall of the square sealing plate 24 is in sealing fit with the inner wall of the sealing space 22, the left end surface of the circular sealing plate 16 is abutted against the left end wall of the compression space 14 through a spring 17, the upper end surface of the square sealing plate 24 is abutted against the upper end wall of the sealing space 22 through an elastic component 25, the elastic component 25 and the spring 17 are in a compressed state, and the sum of the elastic forces is equal to the pressure exerted on the circular sealing plate 16 by the hydraulic oil in the impact space 11, in a normal state, the circular sealing plate 16 is maintained to be positioned at the right side of the compression space 14 through the elastic forces of the elastic component 25 and the spring 17, the square sealing plate 24 is positioned at the lower side of the sealing space 22, so that the lower end of the baffle 26 is positioned in the liquid through, and when the impact force applied to the impact plate 13 is reduced, the square sealing plate 24 and the square sealing plate 24 are reset by the elastic force of the elastic member 25 and the spring 17.
In a preferred embodiment, the left end of the telescopic rod 18 is connected with a swing rod 20 extending to the lower right side by a shaft coupling manner, the lower end of the swing rod 20 is connected with a lifting rod 21 extending downwards by a shaft coupling manner, the lower end of the lifting rod 21 passes through a limiting hole 23 to enter the sealing space 22 and is fixedly connected with a square sealing plate 24. In actual use, the telescopic rod 18 moves leftwards, the upper end of the swing rod 20 is pulled to move leftwards, the lower end of the swing rod 20 is connected with the upper end of the lifting rod 21 in a shaft mode, the movement direction of the lifting rod 21 is limited by the limiting hole 23, the lifting rod 21 can only move upwards and downwards, therefore, the lower end of the swing rod 20 can only move upwards and downwards, along with the leftward movement of the upper end of the swing rod 20, the lower end of the swing rod 20 can be pulled to move upwards, the square sealing plate 24 is driven to move upwards through the lifting rod, the liquid passing aperture of the liquid passing port 5 is increased, the impact force applied to the plate body 1 is reduced, and the service life of the device is prolonged.
The invention has the beneficial effects that: a wave guard plate for a liquid tank body is characterized in that before the wave guard plate is used, a hydraulic valve is opened, hydraulic oil is injected into an impact space through a liquid injection hole, under a normal state, a round sealing plate is kept to be positioned on the right side of a compression space through the elastic force of an elastic component and a spring, a square sealing plate is positioned on the lower side of the sealing space, the lower end of a baffle plate is positioned in a liquid through hole, when the impact force applied to the impact plate is reduced, the lower ends of the square sealing plate and a square sealing plate reset baffle plate are positioned in the liquid through hole through the elastic force of the elastic component and the spring, the partial caliber of the liquid through hole is shielded through the baffle plate, more impact force generated in the flowing of liquid is concentrated on the wave guard plate, the box body of a buffer tank is subjected to strong surge generated impact force due to the conditions of sudden braking and the like when the liquid is transported, the sealing performance of the impact plate and the inner wall of the impact space is ensured through an annular sealing ring, and the liquid in the liquid tank is prevented from being mixed into the impact space, meanwhile, the impact force received by the impact plate is consistent with the impact force received by the plate body, so that the liquid passing condition of the liquid passing port can be conveniently adjusted automatically according to the impact force received by the plate body, when the impact force received by the plate body is larger than the bearing range of the swash plate, the liquid passing caliber of the liquid passing port is properly increased, part of the impact force is shared on the tank body of the liquid tank, and the use safety of the swash plate is ensured. During the use, strike plate and the interior liquid contact of fluid reservoir through left side or right side, when the strike plate received the impact, the strike plate removes to inside, compress inside hydraulic oil, it removes left to promote circular closing plate through hydraulic oil, and the effect of limiting plate prevents the strike plate excessive movement, avoid the intercommunicating pore and annotate the liquid hole and pass through shock space and exterior space intercommunication, guarantee the steady operation of device, the effectual breakwater access hole of having solved, the air vent, side hole edge stress concentrates and makes it take place torn problem, impact breakwater has been solved because of liquid surges, produce the situation that static leads to the explosion at its surface friction, the not enough problem of breakwater and box welding seam length has also been solved, the effectual fast problem of breakwater of having solved.