A BOG recovery device based on LNG storage tank

Abstract

The application discloses a BOG recovery device based on an LNG storage tank and relates to the technical field of BOG recovery.The device comprises a body and a hose, the outer wall of the body is provided with an inlet, one end of the inlet is provided with a first connecting flange, one end of the hose is provided with a second connecting flange, the body stores the hose through a storage mechanism, and a shielding mechanism is arranged.The storage mechanism and the shielding mechanism are arranged, so that the hose can be stored in the storage box when not in use, and the hose is convenient to store;when the cover is opened to open the storage box, the discharge port is automatically opened;when the storage box is closed, the baffle is rotated to be attached to the discharge port, and the discharge port is automatically shielded;the first connecting flange and the second connecting flange are fixed through the limiting ring, so that the inlet and the hose are connected, the discharge port is convenient to shield when not in use, impurities are prevented from adhering to the discharge port, and the collected gas is prevented from being polluted.

Description

Technical Field

[0001] This invention relates to the field of BOG recovery technology, specifically a BOG recovery device based on an LNG storage tank. Background Technology

[0002] Liquefied natural gas (LNG) storage tanks are specialized products for storing LNG. They are special equipment, Class III pressure vessels, made of 06Ni9DR material, and undergo flaw detection, hydrostatic and pneumatic pressure tests, on-site inspection by the technical supervision bureau, and issuance of pressure vessel inspection certificates. External rust removal and painting are also part of their manufacturing process. LNG storage tanks undergo rigorous quality assessments regarding the materials, dimensions, weld quality, operational quality, installation quality, internal devices, and safety accessories of pressure-bearing components. Routine physical and chemical tests are performed on the tank materials, such as mechanical properties and chemical composition. Welded joints, welds, tank heads, and the geometric positions of various pressure-bearing components are rigorously inspected using X-ray non-destructive testing and magnetic particle testing. The product's sealing performance, pressure resistance, and all other technical indicators that could affect its safe operation are also tested.

[0003] BOG recovery compressors are devices specifically designed for liquefied natural gas (LNG) systems. During the transportation and storage of LNG, a large amount of BOG gas is generated due to temperature and pressure changes. By recovering and reusing BOG gas, the LNG system's dependence on external energy sources can be reduced, thereby lowering energy consumption and costs.

[0004] When the BOG recovery machine is in operation, an inlet is provided on the outer wall of the machine. The LNG storage tank and the inlet are connected by a hose, and the inlet and the hose are connected by a flange. However, when the BOG recovery machine is not in use, the inlet is in an open state, and impurities are prone to adhere to the inlet. When the BOG recovery machine is in use, the impurities adhering to the inlet can easily enter the machine body with the gas, causing gas pollution. In order to avoid impurities adhering to the inlet during the placement process, a BOG recovery device based on an LNG storage tank is provided. Summary of the Invention

[0005] The purpose of this invention is to provide a BOG recovery device based on an LNG storage tank in order to avoid the adhesion of impurities at the feed inlet during placement.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A BOG recovery device based on an LNG storage tank includes a body and a hose. The outer wall of the body is provided with a feed inlet, one end of which is provided with a first connecting flange. One end of the hose is provided with a second connecting flange. The body stores the hose through a storage mechanism, and one end of the feed inlet is blocked by a blocking mechanism.

[0008] The storage mechanism includes a storage box, which is fixedly connected to the outer wall of the machine body and located above the feed inlet. A mounting base is fixedly connected to the outer wall of the storage box, and a cover plate is provided at the top of the storage box. A connecting groove is opened on the outer wall of the cover plate, and a recess is opened on the inner wall of the connecting groove. A connecting block is fixedly connected to the top of the mounting base, and a rotating disk is rotatably connected to the top of the connecting block. A protrusion is fixedly connected to the outer wall of the rotating disk.

[0009] As a further embodiment of the present invention: the shielding mechanism includes a baffle plate, which is rotatably connected to the outer wall of the storage box and located below the mounting base. The baffle plate is rotatably connected to the storage box via a rotating shaft. A first spur gear is fixedly connected to the outer wall of one end of the baffle plate. The first spur gear and the rotating shaft are at the same axial position. A second spur gear is rotatably connected to the outer wall of the first spur gear on the outer wall of the storage box. A connecting shaft is fixedly connected to one end of the second spur gear. A first bevel gear is fixedly connected to one end of the connecting shaft. The second bevel gear is rotatably connected to the inner wall of the storage box on the outer wall of the connecting shaft. A first lead screw is fixedly connected to the top of the second bevel gear. A movable block is connected to the outer wall of the first lead screw. The movable block extends to the top of the storage box. A movable spring is connected between the movable block and the storage box.

[0010] As a further embodiment of the present invention: the blocking mechanism further includes a second lead screw, which is fixedly connected to the bottom end of the rotating disk. A locking block is connected to the outer wall of the second lead screw, and the locking block is slidably connected to the inside of the mounting base. A connecting spring is connected between the locking block and the mounting base.

[0011] As a further embodiment of the present invention: the outer wall of the baffle is provided with a limiting mechanism, the limiting mechanism including an annular groove, the annular groove being formed on the outer wall of the baffle, and the inner wall of the annular groove being connected to a limiting ring.

[0012] As a further embodiment of the present invention: the outer wall of the connecting block is fitted with the inner wall of the connecting groove, and the inner wall of the groove is fitted with the outer wall of the protrusion.

[0013] As a further aspect of the present invention: the bottom end of the movable block is provided with a connecting hole, and the inner wall of the connecting hole is provided with a ball bearing that matches the first lead screw.

[0014] As a further embodiment of the present invention: the first bevel gear meshes with the second bevel gear, and the first spur gear meshes with the second spur gear.

[0015] As a further embodiment of the present invention: the top of the card block is provided with a mounting hole, the inner wall of the mounting hole is provided with a ball matching the second lead screw, and the bottom of the card block is provided with an inclined surface.

[0016] As a further embodiment of the present invention: the inner wall of the annular groove is fitted with the outer wall of the limiting ring, and the inner wall of the limiting ring is tightly fitted with the outer walls of the first connecting flange and the second connecting flange.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention incorporates a storage mechanism and a shielding mechanism. When the hose is not in use, it can be stored in a storage box for convenient storage. When the cover is opened to open the storage box, the discharge port automatically opens. When the storage box is closed, the baffle rotates and fits against the discharge port, automatically shielding it. A limiting ring secures the first and second connecting flanges, thereby connecting the inlet and the hose. This facilitates shielding the discharge port when not in use, preventing impurities from adhering to the discharge port and contaminating the collected gas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the storage box of the present invention;

[0021] Figure 3 This is a schematic diagram of the installation of the cover plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the cover plate of the present invention;

[0023] Figure 5 This is a cross-sectional view of the storage box of the present invention;

[0024] Figure 6 This is a schematic diagram of the baffle of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation of the limiting ring of the present invention;

[0026] Figure 8 This is a schematic diagram of the limiting ring of the present invention.

[0027] In the diagram: 1. Machine body; 2. Feed inlet; 3. First connecting flange; 4. Hose; 5. Second connecting flange; 6. Storage mechanism; 601. Storage box; 602. Mounting base; 603. Cover plate; 604. Connecting groove; 605. Groove; 606. Connecting block; 607. Rotating disk; 608. Protrusion; 7. Blocking mechanism; 701. Baffle; 702. First spur gear; 703. Second spur gear; 704. Connecting shaft; 705. First bevel gear; 706. Second bevel gear; 707. First lead screw; 708. Movable block; 709. Movable spring; 710. Second lead screw; 711. Locking block; 712. Connecting spring; 8. Limiting mechanism; 801. Annular groove; 802. Limiting ring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-8 In this embodiment of the invention, a BOG recovery device based on an LNG storage tank includes a body 1 and a hose 4. The outer wall of the body 1 is provided with an inlet 2, one end of which is provided with a first connecting flange 3, and one end of the hose 4 is provided with a second connecting flange 5. The body 1 stores the hose 4 through a storage mechanism 6, and one end of the inlet 2 is blocked by a blocking mechanism 7. The storage mechanism 6 includes a storage box 601, which is fixedly connected to the outer wall of the body 1 and located above the inlet 2. The outer wall of the storage box 601 is fixedly connected with a mounting base 602, and the top of the storage box 601 is provided with a cover plate 603. The outer wall of the cover plate 603 is provided with a connecting groove 604, and the inner wall of the connecting groove 604 is provided with a groove 605. The top of the mounting base 602 is fixedly connected with a connecting block 606, and the top of the connecting block 606 is rotatably connected with a rotating disk 607. The outer wall of the rotating disk 607 is fixedly connected with a protrusion 608.

[0030] In this embodiment: the hose 4 is stored in the storage box 601. When the storage box 601 is closed, the rotating disk 607 is rotated. The rotation of the rotating disk 607 drives the protrusion 608 to rotate. After the rotating disk 607 rotates 180 degrees, the cover plate 603 is installed on the top of the storage box 601. At this time, the connecting block 606 enters the connecting groove 604, and the protrusion 608 passes through the cover plate 603 through the groove 605. After completion, the rotating disk 607 is rotated so that the protrusion 608 and the groove 605 are misaligned, thereby fixing the cover plate 603 and closing the storage box 601.

[0031] Please refer to this carefully. Figures 2-6 The shielding mechanism 7 includes a baffle 701, which is rotatably connected to the outer wall of the storage box 601 and located below the mounting base 602. The baffle 701 is rotatably connected to the storage box 601 via a rotating shaft. A first spur gear 702 is fixedly connected to the outer wall of one end of the baffle 701. The first spur gear 702 and the rotating shaft are coaxial. A second spur gear 703 is rotatably connected to the outer wall of the storage box 601, located on the outer wall of the first spur gear 702. A connecting shaft 704 is fixedly connected to one end of the second spur gear 703, and a first bevel gear 705 is fixedly connected to one end of the connecting shaft 704. The interior of the storage box 601 is located within the area of ​​the connecting shaft 704. The outer wall of the 4 is rotatably connected to a second bevel gear 706. The top of the second bevel gear 706 is fixedly connected to a first lead screw 707. The outer wall of the first lead screw 707 is connected to a movable block 708. The movable block 708 extends to the top of the storage box 601. A movable spring 709 is connected between the movable block 708 and the storage box 601. The blocking mechanism 7 also includes a second lead screw 710. The second lead screw 710 is fixedly connected to the bottom of the rotating disk 607. A locking block 711 is connected to the outer wall of the second lead screw 710. The locking block 711 is slidably connected to the inside of the mounting base 602. A connecting spring 712 is connected between the locking block 711 and the mounting base 602.

[0032] In this embodiment: when the storage box 601 is closed, the cover plate 603 contacts the movable block 708, pushing the movable block 708 to move, which compresses the movable spring 709. The movement of the movable block 708 drives the first lead screw 707 to rotate. The rotation of the first lead screw 707 drives the second bevel gear 706 to rotate. The rotation of the second bevel gear 706 drives the first bevel gear 705 to rotate. The rotation of the first bevel gear 705 drives the connecting shaft 704 to rotate. The rotation of the connecting shaft 704 drives the second spur gear 703 to rotate. The rotation of the second spur gear 703 drives the first spur gear 702 to rotate. The rotation of the first spur gear 702 drives the baffle 701 to rotate, automatically blocking the discharge port 2.

[0033] When the cover plate 603 is opened, the rotating disk 607 is rotated. The rotation of the rotating disk 607 drives the second lead screw 710 to rotate. The rotation of the second lead screw 710 drives the locking block 711 to move. The locking block 711 moves into the mounting base 602. The cover plate 603 moves and separates from the movable block 708. The movable block 708 moves under the elastic force of the movable spring 709. The displacement of the movable block 708 drives the baffle 701 to rotate and fit against the mounting base 602. After completion, the rotating disk 607 is released. The locking block 711 moves under the elastic force of the connecting spring 712 and contacts the baffle 701 to fix the baffle 701, so that the discharge port 2 can be automatically opened when the cover plate 603 is opened.

[0034] Please refer to this carefully. Figures 7-8The outer wall of the baffle 701 is provided with a limiting mechanism 8. The limiting mechanism 8 includes an annular groove 801, which is formed on the outer wall of the baffle 701. The inner wall of the annular groove 801 is connected to a limiting ring 802. The inner wall of the annular groove 801 fits against the outer wall of the limiting ring 802. The inner wall of the limiting ring 802 fits tightly against the outer walls of the first connecting flange 3 and the second connecting flange 5.

[0035] In this embodiment: when the cover plate 603 is opened, the baffle 701 fits against the mounting base 602, exposing the limiting ring 802. The limiting ring 802 can be moved out of the annular groove 801. Then, the limiting ring 802 is fitted onto the outer wall of the first connecting flange 3, and then the second connecting flange 5 is inserted into the inner wall of the limiting ring 802. The limiting ring 802 limits and fixes the first connecting flange 3 and the second connecting flange 5, facilitating the fixing operation of the first connecting flange 3 and the second connecting flange 5, thereby enabling the docking operation between the feed port 2 and the hose 4.

[0036] Please refer to this carefully. Figures 3-6 The outer wall of the connecting block 606 fits against the inner wall of the connecting groove 604, and the inner wall of the groove 605 fits against the outer wall of the protrusion 608.

[0037] In this embodiment: Rotating the rotating disk 607 causes the protrusion 608 to rotate. After rotating the rotating disk 607 180 degrees, the cover plate 603 is installed on the top of the storage box 601. At this time, the connecting block 606 enters the connecting groove 604, and the protrusion 608 passes through the groove 605 through the cover plate 603. After completion, rotating the rotating disk 607 causes the protrusion 608 and the groove 605 to be misaligned, thereby fixing the cover plate 603.

[0038] Please refer to this carefully. Figure 5 and Figure 6 The bottom end of the movable block 708 is provided with a connecting hole, and the inner wall of the connecting hole is provided with a ball that matches the first lead screw 707. The first bevel gear 705 meshes with the second bevel gear 706, and the first spur gear 702 meshes with the second spur gear 703.

[0039] In this embodiment: when the storage box 601 is closed, the cover plate 603 contacts the movable block 708, pushing the movable block 708 to move, which compresses the movable spring 709. The movement of the movable block 708 drives the first lead screw 707 to rotate. The rotation of the first lead screw 707 drives the second bevel gear 706 to rotate. The rotation of the second bevel gear 706 drives the first bevel gear 705 to rotate. The rotation of the first bevel gear 705 drives the connecting shaft 704 to rotate. The rotation of the connecting shaft 704 drives the second spur gear 703 to rotate. The rotation of the second spur gear 703 drives the first spur gear 702 to rotate. The rotation of the first spur gear 702 drives the baffle 701 to rotate, automatically blocking the discharge port 2.

[0040] Please refer to this carefully. Figure 5 and Figure 6 The top of the locking block 711 is provided with a mounting hole, and the inner wall of the mounting hole is provided with a ball that matches the second lead screw 710. The bottom of the locking block 711 is provided with a bevel.

[0041] In this embodiment: when the cover plate 603 is opened, the rotating disk 607 is rotated. The rotation of the rotating disk 607 drives the second lead screw 710 to rotate. The rotation of the second lead screw 710 drives the locking block 711 to move. The locking block 711 moves into the mounting base 602. The cover plate 603 moves and separates from the movable block 708. The movable block 708 moves under the elastic force of the movable spring 709. The displacement of the movable block 708 drives the baffle 701 to rotate and fit against the mounting base 602. After completion, the rotating disk 607 is released. The locking block 711 moves under the elastic force of the connecting spring 712 and contacts the baffle 701 to fix the baffle 701, so that the discharge port 2 can be automatically opened when the cover plate 603 is opened.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A BOG recovery device based on an LNG storage tank, comprising a body (1) and a hose (4), wherein the outer wall of the body (1) is provided with a feed inlet (2), one end of the feed inlet (2) is provided with a first connecting flange (3), and one end of the hose (4) is provided with a second connecting flange (5), characterized in that, The machine body (1) stores the hose (4) through the storage mechanism (6), and one end of the feed port (2) is blocked by the blocking mechanism (7); The storage mechanism (6) includes a storage box (601), which is fixedly connected to the outer wall of the machine body (1) and located above the feed inlet (2). The outer wall of the storage box (601) is fixedly connected to a mounting base (602). The top of the storage box (601) is provided with a cover plate (603). The outer wall of the cover plate (603) is provided with a connecting groove (604). The inner wall of the connecting groove (604) is provided with a groove (605). The top of the mounting base (602) is fixedly connected to a connecting block (606). The top of the connecting block (606) is rotatably connected to a rotating disk (607). The outer wall of the rotating disk (607) is fixedly connected to a protrusion (608). The shielding mechanism (7) includes a baffle (701), which is rotatably connected to the outer wall of the storage box (601) and located below the mounting base (602). The baffle (701) is rotatably connected to the storage box (601) via a rotating shaft. A first spur gear (702) is fixedly connected to the outer wall of one end of the baffle (701). The first spur gear (702) and the rotating shaft are located on the same axis. A second spur gear (703) is rotatably connected to the outer wall of the storage box (601) located on the outer wall of the first spur gear (702). A connecting shaft (704) is fixedly connected to one end of the second spur gear (703). A first bevel gear (705) is fixedly connected to one end of the shaft (704). The interior of the storage box (601) is rotatably connected to a second bevel gear (706) located on the outer wall of the connecting shaft (704). A first lead screw (707) is fixedly connected to the top of the second bevel gear (706). A movable block (708) is connected to the outer wall of the first lead screw (707). The movable block (708) extends to the top of the storage box (601). A movable spring (709) is connected between the movable block (708) and the storage box (601). When the storage box (601) is closed, the cover plate (603) contacts the movable block (708). The shielding mechanism (7) also includes a second lead screw (710), which is fixedly connected to the bottom end of the rotating disk (607). A locking block (711) is connected to the outer wall of the second lead screw (710), and the locking block (711) is slidably connected to the inside of the mounting base (602). A connecting spring (712) is connected between the locking block (711) and the mounting base (602). The outer wall of the connecting block (606) is in contact with the inner wall of the connecting groove (604), and the inner wall of the groove (605) is in contact with the outer wall of the protrusion (608).

2. The BOG recovery device based on an LNG storage tank according to claim 1, characterized in that, The outer wall of the baffle (701) is provided with a limiting mechanism (8), the limiting mechanism (8) includes an annular groove (801), the annular groove (801) is opened on the outer wall of the baffle (701), and the inner wall of the annular groove (801) is connected to a limiting ring (802).

3. The BOG recovery device based on an LNG storage tank according to claim 1, characterized in that, The bottom end of the movable block (708) is provided with a connecting hole, and the inner wall of the connecting hole is provided with balls that match the first lead screw (707).

4. A BOG recovery device based on an LNG storage tank according to claim 1, characterized in that, The first bevel gear (705) meshes with the second bevel gear (706), and the first spur gear (702) meshes with the second spur gear (703).

5. A BOG recovery device based on an LNG storage tank according to claim 1, characterized in that, The top of the locking block (711) is provided with a mounting hole, and the inner wall of the mounting hole is provided with a ball that matches the second lead screw (710). The bottom of the locking block (711) is provided with a slope.

6. A BOG recovery device based on an LNG storage tank according to claim 2, characterized in that, The inner wall of the annular groove (801) is in contact with the outer wall of the limiting ring (802), and the inner wall of the limiting ring (802) is in close contact with the outer walls of the first connecting flange (3) and the second connecting flange (5).

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