Combined fixing device of marine LNG fuel C-shaped storage tank

Abstract

The invention discloses a combined fixing device of a marine LNG fuel C-shaped storage tank, comprising: a tank body for storing LNG fuel; the base is used for supporting the tank body; the lantern ring is arranged on the tank body in a sleeving mode, a supporting rod is arranged on the lantern ring, and the supporting rod is connected with the base; the base comprises a supporting seat, a connecting seat, a first spring and a plurality of baffles, the first spring is arranged on the supporting seat, the connecting seat is arranged on the first spring, the supporting rod is inserted into the connecting seat, and the baffles are arranged on the periphery of the connecting seat. The connecting base abuts against the baffle to provide supporting force for the connecting base so as to limit the tank body to continue to transversely move on the base. While the damping effect on the tank body is guaranteed, displacement of the tank body in an emergency can be correspondingly handled, and the using safety of the tank body is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a combined fixing device for a marine LNG fuel C-type storage tank. Background Technology

[0002] Marine LNG fuel type C storage tanks are core energy storage components for clean energy vessels (such as LNG-powered cargo ships and passenger ships). They are mainly used to store cryogenic liquefied natural gas at -162℃. The reliability of their fixing devices directly determines the safety of ship navigation, the stability of LNG storage, and the safety of surrounding equipment and personnel. During ship navigation, ships are susceptible to complex movements such as rolling, pitching, and turbulence caused by wind, waves, and ocean currents. The storage tanks must withstand multiple external forces, including high-frequency vibrations and lateral impacts. At the same time, the cryogenic characteristics of LNG place stringent requirements on the material compatibility and structural stability of the fixing devices. Therefore, the fixing devices for marine LNG fuel type C storage tanks must meet the core requirements of "precise and reliable lateral restraint, sufficient shock absorption and buffering, balanced support force, low-temperature aging resistance, and adaptability to ship dynamic operating conditions." They must effectively limit excessive lateral and longitudinal displacement of the storage tank to prevent the tank from impacting the hull structure or loosening connections that could lead to LNG leakage. They must also weaken vibration transmission through reasonable shock absorption structures to prevent structural embrittlement and fracture under cryogenic conditions.

[0003] Existing marine LNG fuel type C storage tank fixing devices have significant structural design flaws, making them unsuitable for meeting the stringent requirements of both dynamic ship navigation and cryogenic storage. Specific problems are as follows:

[0004] Firstly, existing fixing devices mostly achieve lateral restraint through simple supports, bolt fastening, or a single baffle, lacking a coordinated "buffering-restraint" mechanism. When a ship encounters strong winds and waves and experiences significant rolling, the storage tank will exhibit a strong lateral movement tendency due to inertia. Existing restraint structures are either too rigid to buffer the instantaneous impact force, leading to damage to the tank shell or fixed components; or they are insufficiently rigid, with excessive restraint travel, failing to effectively prevent excessive lateral displacement of the storage tank, easily causing collisions between the storage tank and the ship's structure, breakage of connection points, and ultimately, a major safety hazard of LNG leakage.

[0005] Secondly, some fixed devices only focus on supporting stability and adopt rigid connection structures without targeted vibration reduction design. The high-frequency vibrations generated by ship navigation are directly transmitted to the tank body, which not only aggravates the fatigue wear of the tank shell, but may also cause the tank interface, valves and other precision components to loosen and leak. Although some devices have added vibration reduction components, the layout of the vibration reduction components and the support structure is unreasonable, and it is impossible to take into account both the vibration reduction effect and the support rigidity. Under long-term vibration, the vibration reduction components are prone to aging and compression failure, resulting in a decrease in support accuracy and further aggravating the risk of tank displacement. Summary of the Invention

[0006] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0007] In order to overcome the limitations of existing C-type storage tanks in ensuring shock absorption while responding to sudden emergencies, this invention provides a combined fixing device for marine LNG fuel C-type storage tanks.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a combined fixing device for a marine LNG fuel C-type storage tank, comprising: Tanks used to store LNG fuel; The base is used to support the tank. A collar is fitted onto the tank body, and a support rod is provided on the collar, which is connected to the base. The base includes a support seat, a connecting seat, a first spring, and several baffles. The first spring is located on the support seat, the connecting seat is located on the first spring, the support rod is inserted into the connecting seat, and the baffles are located around the connecting seat. When the tank moves laterally in a specified state, causing the tank to move and the connecting seat to move, the connecting seat abuts against the baffles to provide support for the connecting seat, thereby limiting the tank from continuing to move laterally.

[0009] Furthermore, the support is provided with a positioning tube, one end of the first spring is inside the positioning tube, the bottom of the connecting seat is provided with a positioning groove, and the other end of the first spring is fixed to the inner wall of the positioning groove; a gap is left between the connecting seat and the support seat so that the middle part of the first spring is exposed.

[0010] Furthermore, a support plate is provided on the support base, a baffle is provided on the support plate, a first movable groove is provided on the baffle, and a flap is provided in the first movable groove. After the flap rotates, one end of the flap abuts against the side wall of the support rod.

[0011] Furthermore, the flap plate is provided with a first through cavity, and a connecting shaft passes through the first through cavity. The side wall of the first movable groove is provided with a connecting groove corresponding to the connecting shaft. One end of the flap plate is provided with a counterweight, and the distance between the first through cavity and the counterweight is greater than the distance between the first through cavity and the other end of the flap plate.

[0012] Furthermore, the side wall of the baffle is provided with a groove, one end of the connecting shaft passes through the groove, one end of the connecting shaft is provided with a ratchet, and the groove is provided with a pawl assembly, so that the flap is flipped under the action of the counterweight and then fixed in an inclined state.

[0013] Furthermore, the pawl assembly includes a mounting block, a pawl, and a second spring. The mounting block has a guide groove, the pawl is located in the guide groove, one end of the second spring is fixed to the pawl, and the other end is fixed to the inner wall of the guide groove.

[0014] Furthermore, a guide frame is provided inside the groove, the mounting block is located inside the guide frame, one end of the mounting block is provided with a third spring, and one end of the third spring is fixed to the inner wall of the groove; a turntable is rotatably connected inside the groove, and a push rod is provided on the turntable, and one end of the mounting block is provided with an arc-shaped surface corresponding to the push rod.

[0015] Furthermore, the combined stationary assembly for marine LNG fuel type C storage tanks also includes: The first track was placed inside the ship's cabin; The second track is fixedly connected to the first track; The third track is slidably connected to the first track; The support is located on the second and third tracks, and the support can move along the second or third track.

[0016] Furthermore, the first track is provided with multiple fixed grooves, the second track is provided with a slot, the first track is located in the slot, the second track is provided with a movable cavity communicating with the slot, the movable cavity is provided with a first fixed block, the top of the movable cavity is provided with a through hole, a pull rod is rotatably connected to the first fixed block, the pull rod passes through the through hole, the pull rod is provided with a limit rod, and the side wall of the through hole is provided with a first through groove corresponding to the limit rod.

[0017] Furthermore, the bottom of the support base is provided with a fastening part, which fastens to the second or third track. The second and third tracks are provided with multiple first screw holes, and the side wall of the fastening part is provided with a second screw hole. The bottom of the second track is provided with multiple support blocks, and the support blocks are provided with pads.

[0018] The advantages of this invention are: The baffles around the base work in synergy with the first spring. When the ship encounters strong winds and waves and rolls significantly, the storage tank tends to move laterally due to inertia, which in turn moves the connecting seat. The first spring can first provide flexible buffering of the instantaneous lateral impact force, avoiding damage to the storage tank shell or fixed components caused by rigid collisions. When the connecting seat moves to the position of the baffle, the baffle quickly provides rigid support force, accurately limiting the continued lateral displacement of the connecting seat and the storage tank. This completely solves the problems of existing fixing devices being too rigid and prone to damage, or having insufficient rigidity and failing to limit the movement. It effectively prevents the storage tank from colliding with the ship's structure and the connection from breaking, thus avoiding major safety hazards of LNG leakage at the source.

[0019] The first spring is located between the support base and the connecting base, replacing the existing rigid connection or unreasonable layout of a single shock-absorbing component. It can effectively absorb the high-frequency vibration generated by ship navigation, weaken the transmission of vibration to the tank body, and avoid fatigue wear of the tank shell and loosening and leakage of precision components such as interfaces and valves. At the same time, the elastic support of the spring can ensure the support stability of the connecting base and the tank, and prevent the support accuracy from decreasing due to excessive shock absorption. It achieves the dual requirements of "sufficient shock absorption and firm support", and solves the core contradiction of shock absorption and support imbalance in the existing device. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0021] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the combined fixing device for a marine LNG fuel C-type storage tank in one embodiment of the present invention.

[0023] Figure 2 for Figure 1 Enlarged view of point A in the image.

[0024] Figure 3 for Figure 1 A cross-sectional view of the base of the combined fixing device for the marine LNG fuel type C storage tank in the illustrated embodiment.

[0025] Figure 4 for Figure 3 Enlarged view of point B in the image.

[0026] Figure 5 for Figure 3 Enlarged view of point C in the image.

[0027] Figure 6 for Figure 1 A cross-sectional view of the groove of the combined fixing device for the marine LNG fuel C-type storage tank in the illustrated embodiment.

[0028] Figure 7 for Figure 6 Enlarged view of point D in the image.

[0029] Figure 8 for Figure 1 A cross-sectional view of the flap of the combined fixing device for the marine LNG fuel type C storage tank in the illustrated embodiment.

[0030] Figure 9 for Figure 8 Enlarged view of point E in the image.

[0031] Figure 10 for Figure 9 Enlarged view of point F in the image.

[0032] The meanings of the reference numerals in the figure are as follows: 101. Tank body; 102. First track; 1021. Fixing groove; 103. Second track; 104. Third track; 1041. First screw hole; 105. Base; 1051. Support seat; 1052. Positioning tube; 1053. First spring; 1054. Connecting seat; 1055. Mounting plate; 1056. Fastening part; 106. Collar; 107. Pull rod; 108. Pull ring; 1081. Second through groove; 109. First through groove; 110. Support rod; 111. First fixing block; 1111 113. Notch; 114. Limiting rod; 115. Baffle; 116. Flip plate; 117. Counterweight; 118. Connecting shaft; 119. Movable rod; 120. Fourth spring; 121. Push plate; 122. Cavity; 123. Support block; 124. Second through cavity; 125. Foot pad; 126. Ratchet; 127. Pad; 128. Mounting block; 129. Second spring; 130. Guide frame; 131. Third spring; 132. Push rod; 133. Second fixing block; 134. Fixing bolt; 135. Turntable. Detailed Implementation

[0033] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0034] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0035] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0036] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0037] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0038] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figure 1-10 As shown, a combined fixing device for a marine LNG fuel type C storage tank includes a tank body 101, a base 105, and a collar 106. The tank body 101 is used to store LNG fuel; the base 105 supports the tank body 101; the collar 106 is sleeved on the tank body 101, and a support rod 110 is provided on the collar 106, which is connected to the base 105. Fixing the tank body 101 by the collar 106 increases the contact area with the tank body 101, making the force on the tank body 101 more even and avoiding damage to the tank body 101 due to excessive local stress. The collar 106 is connected to the base 105 by the support rod 110, which can distribute the weight of the tank body 101 to the base 105, further improving the overall structural stability. Preferably, at least two collars 106 are fitted onto a tank 101, located at the front and rear ends of the tank 101 respectively, so as to provide uniform support for the tank 101.

[0040] The base 105 includes a support base 1051, a connecting base 1054, a first spring 1053, and several baffles 114. The first spring 1053 is disposed on the support base 1051, the connecting base 1054 is disposed on the first spring 1053, the support rod 110 is inserted into the connecting base 1054, and the baffles 114 are disposed around the connecting base 1054. When the tank 101 is in a specified state and the hull causes the tank 101 to move laterally, causing the connecting base 1054 to move, the connecting base 1054 abuts against the baffles 114 to provide support for the connecting base 1054, thereby limiting the lateral movement of the tank 101.

[0041] When the ship's hull experiences dynamic movements such as rolling and pitching due to wind and waves, causing the tank 101 to tend to move laterally, the connecting seat 1054 will move along with the tank 101. At this time, the first spring 1053 under the connecting seat 1054 will first activate, using its elastic deformation to initially buffer the lateral impact force on the tank 101, effectively weakening the instantaneous impact energy and avoiding structural damage caused by rigid collisions. When the movement of the connecting seat 1054 reaches a preset range, its outer peripheral wall will abut against the baffles 114 set around it. The baffles 114, with their stable structure, provide strong rigid support for the connecting seat 1054, thereby quickly limiting further lateral displacement of the connecting seat 1054 and the tank 101, ensuring that the tank 101 will not collide with other structures of the hull due to excessive movement or cause the connecting parts to loosen or break, fundamentally guaranteeing the safety of LNG storage.

[0042] The support is equipped with a positioning tube 1052. One end of the first spring 1053 is located inside the positioning tube 1052. The bottom of the connecting seat 1054 is provided with a positioning groove, and the other end of the first spring 1053 is fixed to the inner wall of the positioning groove. A gap is left between the connecting seat 1054 and the support seat 1051, so that the middle part of the first spring 1053 is exposed. The cooperation between the positioning tube 1052 and the positioning groove provides precise radial positioning for the first spring 1053, effectively preventing the first spring 1053 from shifting or twisting laterally during compression or tension, ensuring that the spring always works stably along the axial direction, thereby ensuring the stability of the connecting seat 1054 and the tank body 101 support. The gap between the connecting seat 1054 and the support seat 1051 exposes the middle part of the first spring 1053. This design not only facilitates the visual observation and daily maintenance of the working state of the first spring 1053, allowing for timely detection of potential problems such as cracks or deformation, but also makes it easier for the exposed spring to exchange heat with the external environment in low-temperature conditions, reducing changes in spring performance caused by temperature gradient differences. At the same time, it avoids frictional wear caused by excessive wrapping between the spring and the support seat 1051 or connecting seat 1054, thus extending the service life of the first spring 1053.

[0043] A support plate is provided on the support base 1051, and a baffle 114 is provided on the support plate. The baffle 114 is provided with a first movable groove, and a flap 115 is provided in the first movable groove. After the flap 115 rotates, one end of it abuts against the side wall of the support rod 110. When the flap 115 has a tendency to move laterally in the tank 101, it can contact the support rod 110 by rotating itself, forming a second limiting defense line. When the ship's roll amplitude is small, the tank causes the connecting seat 1054 to move slightly laterally. At this time, the buffering effect of the first spring 1053 can offset most of the impact force. The flap 115 remains in its initial state and does not contact the support rod 110, avoiding unnecessary rigid intervention. However, when the ship encounters strong winds and waves, causing the roll amplitude to increase, the lateral movement of the tank intensifies. When the connecting seat 1054 moves towards the baffle 114 to a certain extent, the flap 115 rotates, causing one end to gradually approach the side wall of the support rod 110 and finally abut against it. The flap 115 applies lateral support force to the support rod 110, further limiting the displacement of the connecting seat 1054. Together with the final limit of the baffle 114, a stepped buffer limit mechanism is formed, effectively dispersing the instantaneous impact force and preventing the connecting seat 1054 from directly and rigidly impacting the baffle 114 and causing damage.

[0044] The flap 115 has a first through cavity, through which a connecting shaft 117 passes. A connecting groove corresponding to the connecting shaft 117 is provided on the side wall of the first movable groove. A counterweight 116 is provided at one end of the flap 115, and the distance between the first through cavity and the counterweight 116 is greater than the distance between the first through cavity and the other end of the flap 115. The counterweight 116 allows the flap 115 to quickly rotate to a tilted state to contact the support rod 110 when the hull tilts or experiences significant inertia under special conditions. The asymmetrical arrangement of the connecting shaft 117 makes it easier for the flap 115 to flip under the action of the counterweight 116, further improving the sensitivity and timeliness of the flap 115's response. When the hull experiences a large lateral acceleration due to a sudden event, the counterweight 116, under the influence of inertia, will cause the flap 115 to rotate rapidly around the connecting shaft 117. The end of the flap 115 without the counterweight 116 can quickly flip towards the support rod 110 and press against it, ensuring that auxiliary support is provided in the early stages of tank displacement and avoiding the problem of untimely limiting due to the delayed response of the flap 115. The connecting shaft 117 passes through the first through cavity and mates with the connecting groove on the side wall of the first movable groove, providing a stable rotation center for the flap 115. This ensures that the flap 115 rotates smoothly during long-term use and is not prone to jamming or displacement, thereby maintaining the accuracy and reliability of its contact with the support rod 110.

[0045] Furthermore, a groove is provided on the side wall of the baffle 114, and one end of the connecting shaft 117 passes through the groove. A ratchet 125 is provided on one end of the connecting shaft 117, and a pawl assembly is provided in the groove, so that the flap 115 is fixed in an inclined state after being flipped under the action of the counterweight 116. The pawl assembly includes a mounting block 127, a pawl 126, and a second spring 128. A guide groove is provided on the mounting block 127, and the pawl 126 is located in the guide groove. One end of the second spring 128 is fixed to the pawl 126, and the other end is fixed to the inner wall of the guide groove. When the flap 115 is flipped to an inclined state around the connecting shaft 117 and abuts against the side wall of the support rod 110 under the combined action of the counterweight 116 and the lateral motion inertia of the hull, the connecting shaft 117 synchronously drives the ratchet 125 to rotate. The pawl 126 in the pawl assembly is always tightly engaged with the tooth surface of the ratchet 125 under the elastic thrust of the second spring 128. When the ratchet 125 rotates to a specified angle with the flap 115, the pawl 126 will engage in the tooth groove of the ratchet 125, forming a one-way locking mechanism, thereby firmly fixing the flap 115 in the current tilted support position. This design ensures that the flap 115 will not reset due to subsequent small swaying or reverse movement of the ship after it abuts the support rod 110, and can continuously provide stable lateral support force to the support rod 110 until the ship returns to a stable state or the lock is released by manual operation, effectively preventing unstable support force and structural wear caused by repeated flipping of the flap 115.

[0046] A guide frame 129 is provided inside the groove, and a mounting block 127 is located inside the guide frame 129. A third spring 130 is provided at one end of the mounting block 127, and one end of the third spring 130 is fixed to the inner wall of the groove. A turntable 134 is rotatably connected inside the groove, and a push rod 131 is provided on the turntable 134. One end of the mounting block 127 is provided with an arc-shaped surface corresponding to the push rod 131. When it is necessary to release the locked state of the flip plate 115, the turntable 134 can be rotated, causing the push rod 131 on the turntable 134 to rotate accordingly. After the push rod 131 disengages from the mounting block 127, the third spring 130 pulls the mounting block 127 to move along the guide frame 129, the pawl 126 disengages from the ratchet 125, and the flip plate 115 naturally flips back to its initial position under the gravity of the counterweight 116. The guide frame 129 provides precise guidance for the movement of the mounting block 127, ensuring that the mounting block 127 drives the pawl 126 to move smoothly and preventing jamming during the disengagement or engagement of the pawl 126 with the ratchet 125. When the turntable 134 is rotated back, the push rod 131 moves with the rotation of the turntable 134. The push rod 131 moves along the arc surface of the mounting block 127 to one side of the mounting block 127, pushing the mounting block 127 towards the ratchet 125, thus completing the reset of the pawl 126.

[0047] Furthermore, the combined fixing device for the marine LNG fuel type C storage tank also includes a first rail 102, a second rail 103, and a third rail 104. The first rail 102 has two rails positioned side-by-side within the ship's hold; the second rail 103 is fixedly connected to the first rail 102; the third rail 104 is slidably connected to the first rail 102; and a support base 1051 is located on the second rail 103 and the third rail 104, and the support base 1051 can move along either the second rail 103 or the third rail 104. Through the coordinated arrangement of the first rail 102, the second rail 103, and the third rail 104, multi-dimensional position adjustment of the support base 1051 within the ship's hold is achieved. The second track 103 is fixedly connected to the first track 102, providing a stable reference mounting position for the support base 1051, suitable for the fixed layout requirements of the storage tank. The third track 104 can slide along the first track 102, allowing the support base 1051 to flexibly adjust its position on the first track 102 according to the actual size and number of storage tanks or changes in the ship's spatial layout, greatly enhancing the adaptability of the fixing device to different installation scenarios. The ability of the support base 1051 to move along either the second track 103 or the third track 104 further refines the precision of position adjustment. By sliding along the track direction, the relative position of the storage tank in the longitudinal or transverse direction of the ship can be precisely adjusted, ensuring a reasonable distance between the storage tank and other equipment and structures on the ship, meeting the spatial planning and safety distance requirements in ship design.

[0048] The first track 102 has multiple fixing slots 1021, and the second track 103 has a slot. The first track 102 is located within the slot, and the second track 103 has a movable cavity communicating with the slot. A first fixing block 111 is located within the movable cavity, and a through hole is located at the top of the movable cavity. A pull rod 107 is rotatably connected to the first fixing block 111, and the pull rod 107 extends through the through hole. A limiting rod 113 is located on the pull rod 107, and a first through slot 109 corresponding to the limiting rod 113 is located on the side wall of the through hole. A pull ring 108 is located at the top of the pull rod 107, and the pull ring 108 is rotatably connected to the top of the pull rod 107. When not in use, the pull ring 108 can fit against the second track 103 to prevent the pull ring 108 from protruding.

[0049] Pulling the pull ring 108 upwards causes the pull rod 107 and the first fixing block 111 to move upwards along the movable cavity. The first fixing block 111 disengages from the fixing groove 1021, allowing the second track 103 to slide along the first track 102 to adjust its position. After the position adjustment is complete, releasing the pull ring 108 causes the first fixing block 111 to fall back into the corresponding fixing groove 1021 under its own weight, achieving a quick lock between the second track 103 and the first track 102. After the pull rod 107 moves the limiting rod 113 out of the first through groove 109, rotating the pull rod 107 causes the limiting rod 113 and the first through groove 109 to be misaligned, fixing the pull rod 107 in its current position. The first fixing block 111 remains suspended, facilitating the adjustment of the position of the second track 103. The design of the limiting rod 113 and the first through groove 109 prevents the first fixing block 111 from accidentally falling back when adjusting the position of the second track 103, ensuring the safety and convenience of the operation. When prolonged adjustments or installation requiring multiple personnel are needed, rotating the pull rod 107 causes the limiting rod 113 to deviate from the first through groove 109, thus stably holding the first fixing block 111 in a suspended state. This eliminates the need for continuous manual pulling of the pull rod 107, effectively reducing operational intensity. After adjustment, rotating the pull rod 107 in the opposite direction aligns the limiting rod 113 with the first through groove 109, allowing the first fixing block 111 to accurately fall into the fixing groove 1021 under gravity, completing the locking process. The entire process is fast and efficient, requiring no additional tools, significantly improving installation and maintenance efficiency.

[0050] The support base 1051 has a fastening part 1056 at its bottom, which fastens to the second track 103 or the third track 104. The second track 103 and the third track 104 have multiple first screw holes 1041, and the side wall of the fastening part 1056 has second screw holes. When the support base 1051 needs to be fixed to the second track 103 or the third track 104, bolts can be passed sequentially through the second screw holes of the fastening part 1056 and the first screw holes 1041 on the track to achieve a rigid connection between the support base 1051 and the track. The multiple first screw holes 1041 allow the support base 1051 to be finely adjusted along the length of the track according to actual needs before being fixed, further improving the flexibility of position adjustment and installation accuracy. The design of the fastening part 1056 allows the support seat 1051 to be securely fastened to the rail, preventing lateral slippage during ship navigation. This provides initial positioning and stabilization for the support seat 1051. Combined with the tightening of bolts, this forms a double fixing guarantee, ensuring the structural stability of the support seat 1051 when bearing the weight of the tank 101 and the dynamic load of the ship.

[0051] The second track 103 has multiple support blocks 122 at its bottom, with rubber feet 124 mounted on each block. The bottom of each foot 124 is concave to form a groove, creating an adhesive force when placed on the ship's floor. This enhances the friction between the second track 103 and the floor, effectively preventing displacement of the second track 103 due to turbulence and vibration during navigation. The rubber feet 124 also possess good elasticity and cushioning properties, absorbing some of the vibration energy transmitted from the ship's hull to the track, reducing the impact of vibration on the overall structure of the fixing device. Simultaneously, it avoids direct contact between the metal support blocks 122 and the ship's floor, preventing wear or noise. The groove design on the bottom of the feet 124, when pressed against the ground, squeezes out air, creating a localized negative pressure that further enhances the installation stability of the second track 103, ensuring it maintains a stable support under various dynamic conditions on the ship.

[0052] The support block 122 has a second through cavity 123, which communicates with the groove on the foot pad 124. The second track 103 has a cavity 121, through which the second through cavity 123 passes. The cavity 121 communicates with the movable cavity. The side wall of the movable cavity has a second movable groove. A movable rod 118 is installed inside the cavity 121. One end of the movable rod 118 is rotatably connected to the inner wall of the cavity 121, and the other end is located in the second movable groove. The end of the movable rod 118 located in the second movable groove has a... The push plate 120 has a notch 1111 on the first fixed block 111, and the push plate 120 is located below the notch 1111. The bottom of the second movable groove is provided with a fourth spring 119, and the top of the fourth spring 119 abuts against the bottom surface of the movable rod 118. The movable rod 118 is provided with multiple second through grooves 1081. When the movable rod 118 is at the bottom surface of the cavity 121, the second through grooves 1081 and the second through cavity 123 are staggered. When one end of the movable rod 118 is rotated and raised, the second through grooves 1081 and the second through cavity 123 are aligned.

[0053] Before installing the tank 101, if it is necessary to adjust the position of the second track 103, pull the lever 107 to move it. The lever 107 drives the first fixed block 111 to rise, and the notch 1111 disengages from the push plate 120. The fourth spring 119 pushes one end of the movable rod 118 to flip upward. This causes the second through groove 1081 on the movable rod 118 to gradually align with the second through cavity 123 of the support block 122. At this time, the negative pressure in the groove of the foot pad 124 is released, and the groove is connected to the outside atmosphere through the second through cavity 123 and the second through groove 1081. Outside air can enter the groove, eliminating the suction force between the foot pad 124 and the cabin floor, thereby greatly reducing the friction force when pushing the second track 103 to slide along the first track 102, making the position adjustment process more effortless and smooth. Once the second track 103 is adjusted to the target position and locked by the first fixing block 111, the first fixing block 111 falls back to its original position. Its bottom notch 1111 re-engages with the push plate 120 and presses it down. The push plate 120 drives the movable rod 118 to overcome the elastic force of the fourth spring 119 and rotate downwards around its rotating end. The second through slot 1081 and the second through cavity 123 are misaligned again. The rod portion of the movable rod 118 seals the second through cavity 123, and the groove of the pad 124 returns to a sealed state. Air inside the groove cannot freely enter or exit, and the pad 124 re-establishes a stable negative pressure adsorption effect, ensuring that the second track 103 regains its original installation stability after adjustment.

[0054] The collar 106 has a third movable groove, within which a second fixing block 132 is located. A fixing bolt 133 passes through the side wall of the third movable groove, with one end of the fixing bolt 133 abutting against the second fixing block 132. By tightening the fixing bolt 133, the second fixing block 132 can be pushed along the third movable groove towards the center of the collar 106 until it is tightly abutting against the outer wall of the support rod 110, thus achieving rigid fixation between the collar 106 and the support rod 110. The third movable groove provides guidance for the movement of the second fixing block 132, ensuring its smooth movement under the push of the fixing bolt 133 and precise positioning to the position where it fits against the support rod 110. The threaded engagement between the fixing bolt 133 and the side wall of the third movable groove has a self-locking function. Once tightened, it maintains the stable position of the second fixing block 132, preventing the fixing bolt 133 from loosening due to vibration during navigation, thereby ensuring the reliability of the collar 106's fixation of the support rod 110. The contact surface between the second fixing block 132 and the tank body 101 can be made of rubber. This increases the friction between the fixing block and the tank body 101, further improving the fixing effect, and also avoids direct contact between metal materials, preventing wear on the surface of the tank body 101 and protecting it. In addition, the elastic properties of rubber can absorb some energy during ship vibration, reducing the rigid impact between the collar 106 and the tank body 101 and lowering the risk of structural fatigue damage.

[0055] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A combined fixing device for a marine LNG fuel type C storage tank, characterized in that: include: Tank (101) is used to store LNG fuel; A base (105) is used to support the tank (101); A collar (106) is fitted onto the tank body (101), and a support rod (110) is provided on the collar (106), and the support rod (110) is connected to the base (105); The base (105) includes a support base (1051), a connecting base (1054), a first spring (1053), and several baffles (114). The first spring (1053) is disposed on the support base (1051), the connecting base (1054) is disposed on the first spring (1053), the support rod (110) is inserted into the connecting base (1054), and the baffles (114) are disposed around the connecting base (1054). When the tank (101) is in a specified state of the hull, causing the tank (101) to move laterally and drive the connecting base (1054) to move, the connecting base (1054) abuts against the baffles (114) to provide support for the connecting base (1054) and limit the tank (101) from continuing to move laterally.

2. The combined fixing device for marine LNG fuel type C storage tanks according to claim 1, characterized in that: The support is provided with a positioning tube (1052), one end of the first spring (1053) is located inside the positioning tube (1052), the bottom of the connecting seat (1054) is provided with a positioning groove, and the other end of the first spring (1053) is fixed to the inner wall of the positioning groove; a gap is left between the connecting seat (1054) and the support seat (1051) so that the middle part of the first spring (1053) is exposed.

3. The combined fixing device for marine LNG fuel type C storage tanks according to claim 2, characterized in that: The support base (1051) is provided with a support plate, and the baffle (114) is provided on the support plate. The baffle (114) is provided with a first movable groove, and a flap (115) is provided in the first movable groove. After the flap (115) is rotated, one end of it abuts against the side wall of the support rod (110).

4. The combined fixing device for marine LNG fuel type C storage tanks according to claim 3, characterized in that: The flap (115) is provided with a first through cavity, and a connecting shaft (117) passes through the first through cavity. The side wall of the first movable groove is provided with a connecting groove corresponding to the connecting shaft (117). One end of the flap (115) is provided with a counterweight (116), and the distance between the first through cavity and the counterweight (116) is greater than the distance between the first through cavity and the other end of the flap (115).

5. The combined fixing device for marine LNG fuel type C storage tanks according to claim 4, characterized in that: The side wall of the baffle (114) is provided with a groove, one end of the connecting shaft (117) is inserted into the groove, one end of the connecting shaft (117) is provided with a ratchet (125), and a pawl assembly is provided in the groove, so that the flip plate (115) is flipped under the action of the counterweight (116) and fixed in an inclined state.

6. The combined fixing device for marine LNG fuel type C storage tanks according to claim 5, characterized in that: The pawl assembly includes a mounting block (127), a pawl (126), and a second spring (128). The mounting block (127) is provided with a guide groove, the pawl (126) is disposed in the guide groove, one end of the second spring (128) is fixed to the pawl (126), and the other end is fixed to the inner wall of the guide groove.

7. The combined fixing device for marine LNG fuel type C storage tanks according to claim 6, characterized in that: A guide frame (129) is provided in the groove, and the mounting block (127) is located in the guide frame (129). A third spring (130) is provided at one end of the mounting block (127), and one end of the third spring (130) is fixed to the inner wall of the groove. A turntable (134) is rotatably connected in the groove, and a push rod (131) is provided on the turntable (134). One end of the mounting block (127) is provided with an arc-shaped surface corresponding to the push rod (131).

8. The combined fixing device for marine LNG fuel type C storage tanks according to claim 1, characterized in that: Also includes: The first track (102) is placed inside the ship's cabin; The second track (103) is fixedly connected to the first track (102); The third track (104) is slidably connected to the first track (102); The support base (1051) is disposed on the second track (103) and the third track (104), and the support base (1051) is movable along the second track (103) or the third track (104).

9. The combined fixing device for marine LNG fuel type C storage tanks according to claim 8, characterized in that: The first track (102) is provided with multiple fixed grooves (1021), the second track (103) is provided with a slot, the first track (102) is located in the slot, the second track (103) is provided with a movable cavity communicating with the slot, the movable cavity is provided with a first fixed block (111), the top of the movable cavity is provided with a through hole, the first fixed block (111) is rotatably connected with a pull rod (107), the pull rod (107) passes through the through hole, the pull rod (107) is provided with a limiting rod (113), and the side wall of the through hole is provided with a first through groove (109) corresponding to the limiting rod (113).

10. The combined fixing device for marine LNG fuel type C storage tanks according to claim 8, characterized in that: The support base (1051) has a fastening part (1056) at its bottom, which fastens to the second track (103) or the third track (104). The second track (103) and the third track (104) have multiple first screw holes (1041), and the fastening part (1056) has a second screw hole on its side wall. The second track (103) has multiple support blocks (122) at its bottom, and the support blocks (122) have pads (124).

Images