CN114148459A - Leakage liquid cargo collecting device suitable for low-temperature liquid cargo tank - Google Patents
Leakage liquid cargo collecting device suitable for low-temperature liquid cargo tank Download PDFInfo
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- CN114148459A CN114148459A CN202210016387.4A CN202210016387A CN114148459A CN 114148459 A CN114148459 A CN 114148459A CN 202210016387 A CN202210016387 A CN 202210016387A CN 114148459 A CN114148459 A CN 114148459A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/082—Arrangements for minimizing pollution by accidents
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Abstract
本发明公开了液货舱泄漏液货处理技术领域的一种适用于低温液货舱的泄漏液货收集装置，包括导流器，导流器内部设有导流腔，导流器上设有与导流腔连通的进液口和排液口；集液容器，集液容器设置于导流器的下方并设有与排液口相配合的上开口；封堵头，封堵头设置于导流腔中；弹性复位机构，弹性复位机构设置于导流腔中，弹性复位机构与封堵头连接，用于带动封堵头移动或使所述封堵头封堵进液口。本发明通过导流器可将泄漏通道内的泄漏液货引流至集液容器内，实现泄漏液货的收集；通过弹性复位机构对封堵头的作用力带动封堵头移动并封堵导流器的进液口，实现泄漏通道的密封，使得泄漏通道内部形成干燥的不燃环境，提高液货舱的使用安全性。
The invention discloses a leakage liquid cargo collection device suitable for low temperature liquid cargo tanks in the technical field of liquid cargo tank leakage liquid cargo processing. The liquid inlet and the liquid discharge port communicated with the flow chamber; the liquid collection container, the liquid collection container is arranged below the diverter and is provided with an upper opening matched with the liquid discharge port; the plugging head is arranged in the diversion The elastic reset mechanism is arranged in the diversion cavity, and the elastic reset mechanism is connected with the plugging head, and is used to drive the plugging head to move or make the plugging head block the liquid inlet. In the present invention, the leaked liquid cargo in the leakage channel can be drained into the liquid collecting container through the diverter to realize the collection of the leaked liquid cargo; the force of the elastic reset mechanism on the plugging head drives the plugging head to move and block the diversion The liquid inlet of the tank can be used to seal the leakage channel, so that a dry and non-combustible environment is formed inside the leakage channel, and the safety of the use of the cargo tank is improved.
Description
Technical Field
The invention relates to the technical field of liquid cargo leakage treatment of a liquid cargo tank, in particular to a leakage liquid cargo collecting device suitable for a low-temperature liquid cargo tank.
Background
A liquefied gas carrier is a vessel for transporting low-temperature liquefied gas cargo. When the liquefied gas carrier sails on the sea, the liquid cargo tank may have an unpredictable low-temperature liquid cargo leakage phenomenon, and the leaked low-temperature liquid cargo (leakage liquid cargo for short) can greatly reduce the local temperature of the ship body, so that the structure of the ship shell is invalid, and the safety of the ship is affected, therefore, the leaked liquid cargo needs to be guided to a designated area to be collected and safely processed.
Patent document CN109204709A discloses a leaking liquid collecting device for a cargo tank, which collects leaking liquid cargo by guiding the leaking liquid cargo to a liquid collecting container through a flow guide pipe communicated with a leaking passage. However, the collecting device adopts a straight-through structure, so that the leakage channel is communicated with the internal space of the ship, and the inside of the leakage channel cannot maintain a dry and non-combustible environment, thereby not only reducing the use safety of the liquid cargo tank, but also leading the liquid cargo tank to be affected with damp and corroded and shortening the service life of the liquid cargo tank.
Therefore, on the premise of ensuring a dry and non-combustible environment inside the leakage channel, how to collect the leaked liquid cargo in the leakage channel becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a leaked liquid cargo collecting device suitable for a low-temperature liquid cargo tank, so as to solve the technical problem that the existing leaked liquid cargo collecting device cannot realize a dry and non-combustible environment inside a leakage channel.
The technical scheme adopted by the invention is as follows: a spilled cargo collection device adapted for use with a cryogenic cargo tank for collecting spilled cargo within a spillway, comprising:
the liquid director is internally provided with a flow guide cavity, the top end of the liquid director is provided with a liquid inlet communicated with the flow guide cavity, the liquid inlet is used for being communicated with a leakage channel, and the bottom end of the liquid director is provided with a liquid outlet communicated with the flow guide cavity;
the liquid collecting container is arranged below the fluid director, and the top of the liquid collecting container is provided with an upper opening matched with the fluid outlet;
the blocking head is arranged in the diversion cavity;
the elastic resetting mechanism is arranged in the flow guide cavity and is connected with the plugging head and used for driving the plugging head to move or enabling the plugging head to plug the liquid inlet.
Preferably, the leaked liquid cargo collecting device further comprises a low temperature resistant film, the low temperature resistant film is arranged in the diversion cavity and divides the diversion cavity into an upper cavity and a lower cavity which are not communicated with each other, and the elastic resetting mechanism is arranged in the upper cavity; the elastic reset mechanism comprises an elastic sheet barb, the elastic sheet barb is connected with the blocking head, and the elastic sheet barb can move downwards along with the blocking head and is made of the low-temperature-resistant film.
Preferably, the elastic reset mechanism further comprises a spring and a supporting platform, the supporting platform is arranged in the upper cavity and fixedly connected with the fluid director, one end of the spring is fixedly connected with the supporting platform, the other end of the spring is fixedly connected with the plugging head, and the deformation acting force of the spring can enable the plugging head to move or enable the plugging head to plug the fluid inlet.
Preferably, the elastic reset mechanism further comprises a supporting column, the top end of the supporting column is fixedly connected with the blocking head, and the bottom end of the supporting column is connected with the elastic sheet barb; one end of the elastic sheet barb is fixedly connected with the fluid director.
Preferably, the fluid director comprises an upper shell and a lower shell, an upper connecting flange is arranged at the bottom end of the upper shell, a lower connecting flange is arranged at the top end of the lower shell, and the upper connecting flange and the lower connecting flange are connected through a connecting bolt; the low temperature resistant film is arranged between the upper connecting flange and the lower connecting flange.
Preferably, a liquid inlet pipe communicated with the flow guide cavity is integrally formed at the top of the upper shell, and a liquid inlet is formed at one end, far away from the upper shell, of the liquid inlet pipe; go up the casing and be equipped with roof in the sphere, the top of shutoff head be equipped with the spherical binding face of roof closely laminating in the sphere, spherical binding face be used for with roof closely laminating and shutoff in the sphere the inlet.
Preferably, the bottom of the lower shell is provided with a necking part, one end of the necking part, which is far away from the lower shell, is provided with the liquid outlet, and the liquid outlet extends downwards into the upper opening of the liquid collecting container.
Preferably, the elastic sheet barb comprises an elastic sheet part and a barb part which are integrally formed, one end of the elastic sheet part is fixedly connected with the upper shell, and the other end of the elastic sheet part is abutted against the bottom end of the supporting column; the barb of barb portion is towards low temperature resistant film sets up, barb portion can move down along with the elastic sheet portion tip and low temperature resistant film.
Preferably, the liquid collecting container comprises a main body part, a horizontal part and a liquid blocking part, the outer edge of the horizontal part is fixedly connected with an opening at the top end of the main body part, the middle part of the horizontal part is provided with the upper opening, and the horizontal part is used for bearing the lower connecting flange of the lower shell; the liquid blocking part is arranged in the inner cavity of the liquid collecting container in a surrounding mode around the upper opening, and the liquid blocking part is used for blocking sloshing leakage liquid cargos from overflowing.
Preferably, the low temperature resistant film is an aluminized polyethylene film.
The invention has the beneficial effects that:
1. according to the invention, the leaked liquid cargo in the leakage channel can be guided into the liquid collecting container below the fluid director through the fluid director communicated with the leakage channel, so that the leaked liquid cargo is collected; according to the invention, the sealing head and the elastic reset mechanism are arranged in the flow guide cavity of the flow guider, the acting force of the elastic reset mechanism on the sealing head drives the sealing head to move and seal the liquid inlet of the flow guider, so that the liquid inlet of the flow guider is closed and opened, the sealing of a leakage channel is ensured, and dry inert gas in the leakage channel maintains set pressure and circularly flows in the leakage channel, so that the cargo tank is in a non-combustible environment, the use safety of the cargo tank is improved, the corrosion of the wall of the cargo tank can be reduced, and the service life of the cargo tank is prolonged.
2. According to the invention, the low-temperature-resistant film is arranged in the inner cavity of the fluid director, so that double sealing of the leakage channel is realized, and the drying inside the leakage channel is effectively ensured; meanwhile, the elastic sheet barb matched with the elastic reset mechanism has the function of scratching the low-temperature-resistant film when moving downwards, so that the leaked liquid cargo entering the fluid director can be smoothly drained into a liquid collection container below the fluid director.
3. The fluid director comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably connected through a connecting flange, so that the low-temperature resistant film is conveniently fixed in a fluid-guiding cavity of the fluid director.
4. The elastic reset mechanism comprises a spring and a supporting platform, wherein the supporting platform is fixedly arranged in a flow guide cavity of the fluid director, the spring is arranged between the supporting platform and the blocking head, and the spherical joint surface of the blocking head is tightly attached to the spherical inner top wall of the fluid director through the deformation force of the spring, so that the blocking head blocks a fluid inlet of the fluid director to ensure the dryness of the interior of a leakage channel; when the leakage liquid cargo flows to the spring position from the gap between the blocking head and the fluid director, the spring is shortened by the expansion with heat and contraction with cold effect of the spring and drives the blocking head to move downwards, so that the liquid inlet of the fluid director is opened, the downward moving blocking head enables the elastic sheet barb to move downwards and cut through the low temperature resistant film, the whole flow guide cavity is communicated, and the leakage liquid cargo in the leakage channel is guided to the liquid collecting container.
5. According to the invention, the horizontal part is arranged at the top of the liquid collecting container, and the size of the upper opening of the horizontal part is larger than that of the necking part at the bottom end of the fluid director, so that the lower shell of the fluid director can be directly placed on the liquid collecting container when the low-temperature-resistant film is replaced, and the low-temperature-resistant film is convenient to replace.
6. The double-seal structure is adopted, a sealed dry non-combustible environment can be formed inside the leakage channel under the non-leakage state of the liquid cargo tank, and the use safety of the liquid cargo tank is improved; when the liquid cargo tank has low-temperature leakage, the double-sealing structure can be automatically opened after the internal pressure of the leakage channel reaches a preset pressure, so that the leaked liquid cargo in the leakage channel automatically flows into the liquid collecting container; meanwhile, after low-temperature liquid goods in the leakage channel are discharged, the sealing plug can automatically realize the sealing of the leakage channel so as to be convenient for replacing the low-temperature resistant film and quickly realize the double sealing of the leakage channel, so that the invention not only has the advantage of good sealing performance of film sealing, but also has the characteristic of quick response of mechanical sealing.
Drawings
FIG. 1 is a schematic diagram of a spilled cargo collection assembly adapted for use with a cryogenic cargo tank according to the present invention;
FIG. 2 is a schematic view of the internal structure of the fluid director;
FIG. 3 is a schematic view of a fluid director;
FIG. 4 is a schematic view of the liquid collecting container;
FIG. 5 is a schematic structural view of a spring barb;
fig. 6 is a reference diagram showing the use state of the leakage cargo collecting device suitable for the low-temperature cargo tank of the invention.
The reference numbers in the figures illustrate:
100. a leaked liquid cargo collecting device;
110. a fluid director;
111. a flow guide cavity;
112. a liquid inlet;
113. a liquid discharge port;
114. an upper housing;
115. a lower housing;
116. an upper connecting flange;
117. a lower connecting flange;
118. a liquid inlet pipe;
119. a necked-down portion;
120. a liquid collecting container;
121. a main body portion;
122. a horizontal portion;
123. a liquid blocking portion;
124. an upper opening;
130. plugging a plug;
140. an elastic reset mechanism;
141. elastic sheet barb;
1411. a spring piece portion;
1412. a barb portion;
142. a spring;
143. a support platform;
144. a support pillar;
150. a low temperature resistant film;
200. a leakage path;
300. a tank insulation layer;
400. a cargo tank;
500. a ship body.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Embodiment, as shown in fig. 1 to 6, a leaking cargo collecting apparatus for a low temperature cargo tank, the leaking cargo collecting apparatus 100 is installed between a ship body 500 and a cargo tank 400, and is used for collecting leaking cargo in a leaking channel 200, and simultaneously ensuring the sealing of the leaking channel 200, so that the inside of the leaking channel 200 is kept in a dry inert environment, thereby improving the safety of the cargo tank 400; the leakage liquid cargo collecting apparatus 100 includes:
the fluid director 110 is arranged along the vertical direction, a flow guide cavity 111 is arranged in the fluid director 110, a fluid inlet 112 communicated with the flow guide cavity 111 is arranged at the top end of the fluid director 110, and the fluid inlet 112 is used for being communicated with the leakage channel 200 so that the leakage liquid cargo in the leakage channel 200 enters the flow guide cavity 111; a liquid outlet 113 communicated with the flow guide cavity 111 is arranged at the bottom end of the flow guide 110;
the liquid collecting container 120 is arranged right below the fluid director 110, and the top of the liquid collecting container 120 is provided with an upper opening 124 matched with the liquid outlet 113, so that leaked liquid cargo in the diversion cavity 111 enters the liquid collecting container 120 through the liquid outlet 113 and the upper opening 124;
a sealing head 130, the sealing head 130 is arranged in the diversion cavity 111 and is used for sealing the liquid inlet 112 of the flow guider 110;
and the elastic resetting mechanism 140 is arranged in the diversion cavity 111 and is positioned below the blocking head 130, and the elastic resetting mechanism 140 is connected with the blocking head 130 and is used for driving the blocking head 130 to move or enabling the blocking head 130 to block the liquid inlet 112.
According to the liquid collecting device, the leaked liquid cargos in the leakage channel 200 can be guided into the liquid collecting container 120 below the fluid director 110 through the fluid director 110 communicated with the leakage channel 200, so that the leaked liquid cargos are collected; according to the liquid cargo tank 400, the sealing head 130 and the elastic resetting mechanism 140 are arranged in the flow guide cavity 111 of the flow guider 110, the sealing head 130 is driven to move and seal the liquid inlet 112 of the flow guider 110 by the acting force of the elastic resetting mechanism 140 on the sealing head 130, the liquid inlet 112 of the flow guider 110 is closed and opened, the sealing of the leakage channel 200 is guaranteed, the dry inert gas in the leakage channel 200 is maintained at the set pressure and circularly flows in the leakage channel 200, and the liquid cargo tank 400 is further in a non-combustible environment, so that the use safety of the liquid cargo tank 400 is improved, the corrosion of the bulkhead of the liquid cargo tank 400 can be reduced, and the service life of the liquid cargo tank 400 is prolonged.
In an embodiment, as shown in fig. 1 and fig. 2, the leakage liquid cargo collecting device 100 further includes a low temperature resistant film 150, the low temperature resistant film 150 is disposed in the diversion cavity 111 along a horizontal direction, the low temperature resistant film 150 divides the diversion cavity 111 into an upper chamber and a lower chamber which are not communicated with each other, and the elastic restoring mechanism 140 is disposed in the upper chamber; the elastic restoring mechanism 140 includes a spring barb 141, and the spring barb 141 is connected to the blocking head 130 through the supporting pillar 144, so that the spring barb 141 can move downward along with the blocking head 130 and can tear the low temperature resistant film 150. According to the arrangement, the low-temperature-resistant film 150 is arranged in the flow guide cavity 111 of the flow guider 110, the flow guide cavity 111 is divided into the upper cavity and the lower cavity which are not communicated with each other through the low-temperature-resistant film 150, the sealing of the flow guide cavity 111 is realized, the double sealing of the leakage channel 200 is realized by matching the plugging effect of the plugging head 130 on the liquid inlet 112 of the flow guider 110, the dry inert gas can be effectively ensured to keep a certain pressure in the leakage channel 200, and the dry inert gas circularly flows and is isolated from the external gas under the normal working state. By arranging the elastic sheet barb 141 in the elastic resetting mechanism 140, when the sealing head 130 moves downwards to open the liquid inlet 112 of the flow guider 110, the elastic sheet barb 141 of the elastic resetting mechanism 140 moves downwards along with the sealing head 130 and cuts the low temperature resistant film 150, so that the leakage liquid cargo in the leakage channel 200 passes through the flow guide cavity 111 and enters the liquid collecting container 120.
In a specific embodiment, as shown in fig. 1 and 2, the elastic restoring mechanism 140 includes a plurality of springs 142 and a plurality of supporting platforms 143, the supporting platforms 143 are plate-shaped and are disposed in the upper chamber along the horizontal direction, one end of the supporting platform 143 is fixedly connected with the inner wall of the fluid director 110, and the plurality of supporting platforms are uniformly distributed around the circumferential direction of the fluid director 110; the springs 142 are in one-to-one correspondence with the supporting platforms 143, the bottom ends of the springs 142 are fixedly connected with the supporting platforms 143, and the top ends of the springs 142 are fixedly connected with the plugging head 130, so that the plugging head 130 can move or the plugging head 130 can plug the liquid inlet 112 by the deformation acting force of the springs 142. With such an arrangement, the spring 142 elastically supports the upward elastic supporting force of the blocking head 130, so that the spherical abutting surface at the top of the blocking head 130 is tightly abutted to the spherical inner top wall of the flow guider 110, thereby blocking the liquid inlet 112 of the flow guider 110 by the blocking head 130 and ensuring the airtight drying inside the leakage channel 200. By uniformly distributing the supporting platforms 143 on the inner wall of the fluid director 110 in the circumferential direction and by arranging the springs 142 and the supporting platforms 143 in a one-to-one correspondence, the force applied to the plugging head 130 can be uniform, so as to ensure the plugging effect of the plugging head 130 on the fluid inlet 112 of the fluid director 110.
In a preferred embodiment, as shown in fig. 1 and fig. 2, the elastic resetting mechanism 140 further includes a supporting column 144, the supporting column 144 is coaxially disposed in the fluid director 110, and the top end of the supporting column 144 is fixedly connected to the blocking head 130, and the bottom end is connected to the elastic sheet barb 141; one end of the elastic sheet barb 141 is fixedly connected with the fluid director 110. With such an arrangement, the connection between the blocking head 130 and the elastic sheet barb 141 is realized through the supporting column 144 arranged in the diversion cavity 111, so that the elastic sheet barb 141 is driven to move downwards by the downward movement of the blocking head 130 and the low temperature resistant film 150 is scratched. Meanwhile, the end of the elastic sheet barb 141 is fixedly connected with the inner wall of the fluid director 110, so that the elastic deformation of the elastic sheet barb 141 generates an upward acting force on the blocking head 130, and the blocking head 130 can better block the fluid inlet 112 of the fluid director 110 by matching with the deformation force of the spring 142 on the blocking head 130.
In a specific embodiment, as shown in fig. 2 and 3, the fluid director 110 is a split structure, the fluid director 110 includes an upper housing 114 and a lower housing 115, an upper connecting flange 116 is integrally formed at the bottom end of the upper housing 114, a lower connecting flange 117 is integrally formed at the top end of the lower housing 115, and the upper connecting flange 116 and the lower connecting flange 117 are detachably connected through a connecting bolt; the low temperature resistant film 150 is clamped between the upper connecting flange 116 and the lower connecting flange 117 in a horizontal direction. With the arrangement, the flow guider 110 is arranged into the upper shell 114 and the lower shell 115 which are connected through flanges, so that the sealing head 130, the elastic resetting mechanism 140 and the low-temperature resistant film 150 can be conveniently installed and fixed in the flow guiding cavity 111 of the flow guider 110.
In one embodiment, as shown in fig. 3, a liquid inlet pipe 118 is integrally formed at the top of the upper casing 114, a bottom end of the liquid inlet pipe 118 is communicated with the diversion cavity 111, a top end of the liquid inlet pipe 118 away from the upper casing 114 is provided with a liquid inlet 112, and the liquid inlet pipe 118 is used for penetrating through the tank insulation layer 300 and communicating with the leakage channel 200; the upper shell 114 has a spherical inner top wall, and the top of the plugging head 130 has a spherical abutting surface tightly attached to the spherical inner top wall, and the spherical abutting surface is used for tightly attaching to the spherical inner top wall and plugging the liquid inlet 112. In this arrangement, the liquid inlet pipe 118 is integrally formed at the top end of the fluid director 110, and the liquid inlet pipe 118 upwardly penetrates through the tank insulation layer 300 to connect the diversion cavity 111 with the leakage channel 200, so that the leakage liquid in the leakage channel 200 can conveniently flow into the fluid director 110. The spherical abutting surface is arranged on the blocking head 130, and the spherical abutting surface is matched with the spherical inner top wall of the upper shell 114, so that the blocking head 130 can block the liquid inlet 112 of the flow guider 110, when the liquid inlet 112 of the flow guider 110 is opened, the spherical abutting surface of the blocking head 130 also plays a role in guiding the flow of the leaked liquid cargo, so that the leaked liquid cargo flows to the spring 142, the spring 142 is shortened when encountering cold contraction, the blocking head 130 is driven to move downwards by the shortening of the spring 142, and the leaked liquid cargo in the leakage channel 200 can quickly enter the flow guide cavity 111 of the flow guider 110.
In one embodiment, as shown in FIG. 3, the bottom of the lower housing 115 is provided with a necked-down portion 119, and the end of the necked-down portion 119 away from the lower housing 115 is provided with a drain 113, the drain 113 extending downwardly into the upper opening 124 of the liquid collection container 120. With such an arrangement, the bottom of the lower housing 115 is provided with the necking part 119, so that the size of the liquid outlet 113 at the bottom end of the liquid guider 110 is reduced, the size of the liquid outlet 113 is smaller than that of the upper opening 124 of the liquid collecting container 120, and the liquid outlet 113 of the liquid guider 110 can extend downwards into the inner cavity of the liquid collecting container 120, thereby ensuring that all leakage liquid cargos discharged by the liquid guider 110 flow into the liquid collecting container 120.
In one embodiment, as shown in fig. 4, the liquid collecting container 120 includes a main body portion 121, a horizontal portion 122 and a liquid blocking portion 123, the main body portion 121 is used for enclosing the liquid containing cavity of the liquid collecting container 120; the horizontal part 122 is a horizontally arranged annular plate, the outer circumference of the horizontal part 122 is fixedly connected with the top end opening of the main body part 121, the middle part of the horizontal part 122 is provided with an upper opening 124, and the size of the upper opening 124 is larger than that of the necking part 119 at the bottom end of the fluid director 110, so that the necking part 119 of the lower shell 115 can enter the inner cavity of the liquid collecting container 120, and the horizontal part 122 bears and supports the lower connecting flange 117 of the lower shell 115; the liquid blocking part 123 is disposed in the inner cavity of the liquid collecting container 120 around the upper opening 124, and the liquid blocking part 123 is used for blocking the overflow of the sloshing leakage liquid cargo. With the arrangement, when the low temperature resistant film 150 needs to be replaced, the connecting bolts between the upper connecting flange 116 of the upper shell 114 and the lower connecting flange 117 of the lower shell 115 are loosened, the necking part 119 of the lower shell 115 is moved downwards into the inner cavity of the liquid collecting container 120, the lower connecting flange 117 of the lower shell 115 is placed on the horizontal part 122 of the liquid collecting container 120, and the low temperature resistant film 150 is replaced conveniently.
Preferably, a heat insulation layer is disposed between the body portion 121 of the liquid collecting container 120 and the hull 500, and the heat insulation layer further wraps the outer side of the body portion 121 of the liquid collecting container 120. With this arrangement, the leaked liquid cargo collected in the liquid collecting container 120 is prevented from causing the temperature of the hull 500 to be lowered by heat transfer, so as to secure the structural strength and safety of the hull 500.
In one embodiment, as shown in fig. 5, the elastic piece barb 141 includes an elastic piece 1411 and a barb 1412, which are integrally formed and made of metal, so that the elastic piece barb 141 can be elastically deformed; one end of the elastic sheet part 1411 is fixedly connected with the inner wall of the upper shell 114 by welding, the other end of the elastic sheet part 1411 is fixedly connected with one end of the barb part 1412, and the bottom end of the support column 144 abuts against the joint of the elastic sheet part 1411 and the barb part 1412; the other end of the barb 1412 is provided with a barb for tearing the low temperature resistant film 150, and the barb is arranged toward the low temperature resistant film 150, so that the barb 1412 moves down along with the end of the elastic sheet portion 1411 and tears the low temperature resistant film 150. With such arrangement, the elastic sheet barb 141 is fixedly arranged in the diversion cavity 111 of the flow guider 110, and the elastic sheet part 1411 made of metal can provide an upward acting force for the blocking head 130 in the normal non-leakage state of the cargo tank 400, so that the blocking head 130 has a better blocking effect on the liquid inlet of the flow guider 110; when the plugging head 130 moves down, the elastic sheet portion 1411 made of metal can elastically deform, so that the barb portion 1412 of the elastic sheet barb 141 moves down and cuts the low temperature resistant film 150, and further the conduction of the diversion cavity 111 is realized, so that the leaked liquid cargo in the leakage channel 200 can smoothly flow into the inner cavity of the liquid collection container 120.
In one embodiment, the low temperature resistant film 150 is an aluminized polyethylene film. By such arrangement, the low temperature resistant film 150 made of the aluminum-plated polyethylene material can bear the low temperature of-163 ℃, and before the elastic sheet barb 141 punctures the low temperature resistant film 150, the low temperature resistant film 150 can enable leaked liquid entering the diversion cavity 111 to be temporarily stored in the upper chamber of the diversion cavity 111 in an ultralow temperature environment. Specifically, the low temperature resistant film 150 should be made of a low temperature resistant material meeting the use requirement according to the temperature of the loaded low temperature liquid cargo.
In one embodiment, the cargo tank 400 may be a diamond tank, a spherical tank, or a rectangular tank, which may be independently supported.
The working principle of the application is as follows:
when unpredictable leakage occurs in the cargo tank 400, leaked cargo in the leakage channel 200 freely flows under the action of ship shaking and gravity until entering the liquid inlet 112 of the liquid inlet pipe 118 at the top end of the upper shell 114, when the leaked cargo continuously accumulates in the liquid inlet pipe 118 and reaches a certain pressure, the spring 142 is stressed to contract, the spherical abutting surface at the top of the blocking head 130 is separated from the spherical inner top wall of the upper shell 114, so that a gap occurs between the blocking head 130 and the upper shell 114, and the leaked cargo in the liquid inlet pipe 118 flows downwards along the spherical abutting surface of the blocking head 130 through the gap; when the leaked liquid contacts the spring 142, the spring 142 is further contracted when being cooled, and further drives the blocking head 130 to move downwards, so that the liquid inlet 112 of the fluid director 110 is opened; meanwhile, the support column 144 bends and deforms one end of the spring plate barb 141 under the action of the plugging head 130, so that the barb part of the spring plate barb 141 moves downwards and cuts the low temperature resistant film 150, and the leaked liquid cargo flows into the lower chamber from the upper chamber of the diversion chamber 111 and flows into the liquid collection container 120 from the liquid outlet 113 of the necking part 119 of the lower shell 115. When all the leaked liquid cargo in the leakage channel 200 is guided into the inner cavity of the liquid collecting container 120 and is safely treated, the blocking head 130 automatically blocks the liquid inlet 112 of the flow guider 110 upwards under the elastic force of the spring 142 and the elastic sheet barb 141, and a worker immediately replaces the low temperature resistant film 150 between the upper shell 114 and the lower shell 115.
When the ship normally sails and the cargo tank 400 normally loads low-temperature liquid cargo, the leakage channel 200 is filled with dry inert gas which flows in a circulating manner in the leakage channel 200 all the time under the safe working pressure, so that the cargo tank 400 can be in a non-combustible environment, the use safety of the cargo tank 400 is improved, the cargo tank 400 is prevented from being corroded by moisture, and the service life of the cargo tank 400 is prolonged.
Compared with the prior art, the application has at least the following beneficial technical effects:
the leaked liquid cargo collecting device 100 according to the present application is suitable for a liquefied gas carrier carrying various low-temperature liquid cargo such as LPG, LEG, LNG, etc., and the leaked liquid cargo collecting device 100 according to the present application is also suitable for a dual-fuel powered carrier having an independent fuel tank.
The leaked liquid cargo collecting device 100 can effectively guide leaked liquid cargo in the leakage channel 200 to a designated area for collection when unpredictable low-temperature liquid cargo leakage occurs in the liquid cargo tank; and when the low-temperature cargo tank is in a normal cargo carrying state, the double sealing of the leakage channel 200 can be realized, so that the leakage channel 200 is filled with dry inert gas, a non-combustible environment is formed inside the leakage channel 200, the use safety of the cargo tank 400 can be improved, the damp corrosion of the cargo tank can be reduced, and the service life of the cargo tank 400 can be further prolonged.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A leaking cargo collection apparatus adapted for use in a cryogenic cargo tank for collecting leaking cargo within a leak path (200), comprising:
the leakage channel (200) is arranged in the liquid guide (110), a liquid guide cavity (111) is arranged in the liquid guide (110), a liquid inlet (112) communicated with the liquid guide cavity (111) is formed in the top end of the liquid guide (110), the liquid inlet (112) is used for being communicated with the leakage channel (200), and a liquid outlet (113) communicated with the liquid guide cavity (111) is formed in the bottom end of the liquid guide (110);
the liquid collecting container (120) is arranged below the fluid director (110), and the top of the liquid collecting container (120) is provided with an upper opening (124) matched with the liquid outlet (113);
the blocking head (130), the blocking head (130) is arranged in the diversion cavity (111);
the elastic resetting mechanism (140) is arranged in the flow guide cavity (111), and the elastic resetting mechanism (140) is connected with the blocking head (130) and used for driving the blocking head (130) to move or enabling the blocking head (130) to block the liquid inlet (112).
2. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 1, further comprising a low temperature resistant membrane (150), wherein the low temperature resistant membrane (150) is arranged in the diversion cavity (111) and divides the diversion cavity (111) into an upper chamber and a lower chamber which are not communicated with each other, and the elastic resetting mechanism (140) is arranged in the upper chamber; the elastic resetting mechanism (140) comprises an elastic sheet barb (141), the elastic sheet barb (141) is connected with the blocking head (130), and the elastic sheet barb (141) can move downwards along with the blocking head (130) and can tear the low-temperature-resistant film (150).
3. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 2, wherein the elastic return mechanism (140) further comprises a spring (142) and a support platform (143), the support platform (143) is disposed in the upper chamber and is fixedly connected to the flow guider (110), one end of the spring (142) is fixedly connected to the support platform (143) and the other end of the spring is fixedly connected to the blocking head (130), and the deformation force of the spring (142) can move the blocking head (130) or cause the blocking head (130) to block the liquid inlet (112).
4. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 3, wherein the resilient return mechanism (140) further comprises a support column (144), the top end of the support column (144) is fixedly connected with the blocking head (130), and the bottom end of the support column (144) is connected with the spring barb (141); one end of the elastic sheet barb (141) is fixedly connected with the fluid director (110).
5. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 2, wherein the flow guider (110) comprises an upper shell (114) and a lower shell (115), an upper connecting flange (116) is arranged at the bottom end of the upper shell (114), a lower connecting flange (117) is arranged at the top end of the lower shell (115), and the upper connecting flange (116) and the lower connecting flange (117) are connected through connecting bolts; the low temperature resistant film (150) is disposed between the upper connecting flange (116) and the lower connecting flange (117).
6. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 5, wherein a liquid inlet pipe (118) communicated with the diversion cavity (111) is integrally formed at the top of the upper shell (114), and one end of the liquid inlet pipe (118) far away from the upper shell (114) is provided with the liquid inlet (112); the upper shell (114) is provided with a spherical inner top wall, the top of the blocking head (130) is provided with a spherical abutting surface tightly attached to the spherical inner top wall, and the spherical abutting surface is tightly attached to the spherical inner top wall and blocks the liquid inlet (112).
7. A spilled cargo collection device suitable for a cryogenic cargo tank according to claim 5 wherein the bottom of the lower housing (115) is provided with a constriction (119), the end of the constriction (119) remote from the lower housing (115) being provided with the drain outlet (113), the drain outlet (113) extending downwardly into the upper opening (124) of the liquid collection vessel (120).
8. The spilled cargo collection device suitable for the cryogenic cargo tank of claim 5, wherein the spring barb (141) comprises an integrally formed spring portion (1411) and a barb portion (1412), one end of the spring portion (1411) is fixedly connected with the upper shell (114); the barb of the barb part (1412) is arranged towards the low-temperature-resistant film (150), and the barb part (1412) can move downwards along with the end part of the elastic sheet part (1411) and cut the low-temperature-resistant film (150).
9. The spilled cargo collection device suitable for the low-temperature cargo tank is characterized in that the liquid collecting container (120) comprises a main body part (121), a horizontal part (122) and a liquid blocking part (123), the outer edge of the horizontal part (122) is fixedly connected with an opening at the top end of the main body part (121), the horizontal part (122) is provided with the upper opening (124) in the middle, and the horizontal part (122) is used for bearing the lower connecting flange (117) of the lower shell (115); the liquid blocking part (123) is arranged in the inner cavity of the liquid collecting container (120) in a surrounding mode of the upper opening (124), and the liquid blocking part (123) is used for blocking sloshing leakage liquid cargos from overflowing.
10. A spill cargo collection device adapted for use in a cryogenic cargo tank as defined in claim 2 wherein said low temperature resistant film (150) is an aluminized polyethylene film.
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| CN202210016387.4A CN114148459B (en) | 2022-01-07 | 2022-01-07 | Leakage liquid cargo collecting device suitable for low-temperature liquid cargo tank |
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| CN202210016387.4A CN114148459B (en) | 2022-01-07 | 2022-01-07 | Leakage liquid cargo collecting device suitable for low-temperature liquid cargo tank |
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| CN115638363A (en) * | 2022-11-10 | 2023-01-24 | 沪东中华造船(集团)有限公司 | A temperature-sensitive release device for main shield leakage of B-type containment system |
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