Integrated LNG (Liquefied Natural Gas) storing and filling pry

Abstract

The invention discloses an integrated LNG (Liquefied Natural Gas) storing and filling pry, and relates to the field of LNG, the integrated LNG storing and filling pry comprises a pry frame I, a pry frame II is distributed beside the pry frame I in parallel, square blocks are fixedly mounted on the sides of the pry frame I and the pry frame II, and the two groups of square blocks which are arranged on the sides of the pry frame I and the pry frame II in a fitting manner are in threaded connection through mounting screw rods; the mounting screw is in threaded connection with the first threaded groove and the second threaded groove in the two sets of square blocks which are arranged on the side of the first prying frame and the side of the second prying frame in an attached mode, and shifting of the mounting screw is achieved in the first threaded groove through a shifting assembly. Core components such as a pump set, a gas dispenser and a control system are integrally mounted in the first prying frame, the first prying frame and the LNG storage tank are mounted in a communicating mode, and if the components are dismounted, the mounting screw is shifted to be in threaded connection with the second threaded groove, so that the two prying frames are combined into a whole, transportation is convenient, and the cost is reduced. And meanwhile, the second prying frame achieves packaging protection on parts integrally installed in the first prying frame.

Description

Technical Field

[0001] This invention relates to the field of LNG, and more specifically to an integrated LNG storage and refueling skid. Background Technology

[0002] LNG is short for liquefied natural gas. One cubic meter of LNG can be vaporized into approximately 625 cubic meters of natural gas, generating a large amount of heat energy. It can be used as fuel for power plants. After vaporization, LNG can also serve as a source of gas for urban residential and commercial use, providing energy security for people's daily lives and business activities. Furthermore, in some industrial production processes, such as ceramics, glass, and metallurgy, LNG can be used as a heating fuel to replace traditional coal and heavy oil, reducing production costs and environmental pollution. Among these, the LNG storage and refueling skid is a highly integrated "LNG mobile refueling station" that cleverly combines LNG storage and refueling functions. More than 90% of the installation and commissioning is completed in the factory, and it can be put into use after simple connection upon arrival at the site.

[0003] A Chinese patent authorization announcement (CN203671232U) discloses an integrated LNG storage and refueling skid, belonging to the field of LNG refueling equipment manufacturing technology. It provides an integrated LNG storage and refueling skid with a compact structure, convenient on-site installation, and very low construction cost. The integrated LNG storage and refueling skid includes a high-vacuum storage tank, a combined LNG vaporizer, an LNG dispenser, a cryogenic pump tank, and high-vacuum tubing, and also includes a skid frame. The combined LNG vaporizer is integrated onto the high-vacuum storage tank, and the high-vacuum storage tank, LNG dispenser, cryogenic pump tank, and high-vacuum tubing are integrated onto the skid frame.

[0004] The above-mentioned refueling skids also have the following problems when in use: The two sets of refueling skids are set up independently, which means that the two skids are also set up independently during transportation. This requires additional protective devices to protect the core components integrated and installed inside the skids during independent transportation, thereby increasing transportation costs.

[0005] Therefore, it is necessary to invent an integrated LNG storage and refueling skid to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated LNG storage and refueling skid to solve the problem mentioned in the background art where the two sets of refueling skids are set up independently. This means that the two skids are also set up independently during transportation, which requires additional protective devices to protect the core components integrated inside the skids during independent transportation, thereby increasing transportation costs.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated LNG storage and refueling skid, including a skid frame one, a skid frame two distributed parallel to the side of the skid frame one, and square blocks fixedly installed on the sides of both the skid frame one and the skid frame two. The two sets of square blocks that can be fitted together on the sides of the skid frame one and the skid frame two are threadedly connected by mounting screws. The mounting screws are threadedly connected to the threaded grooves one and two in the two sets of square blocks fitted together on the sides of the skid frame one and the skid frame two. The mounting screws can be rotated inside the threaded groove one by a turning component, and the mounting screws can be oiled inside the threaded groove two by an oiling component. The oiling component is controlled to open and close by an elastic component.

[0008] Preferably, the turning assembly includes an annular groove 1 disposed inside and communicating with the threaded groove 1, and an annular block rotatably mounted inside the annular groove 1. The annular block protrudes from the square block and is slidably connected to a limiting rod fixed to the inner wall of the annular block and a limiting groove on the mounting screw. In this way, turning the annular block drives the mounting screw to rotate. When the mounting screw, which is threadedly connected to the threaded groove 1 and the threaded groove 2, rotates, its position moves. When the mounting screw moves and separates from the threaded groove 2, the two sets of pry bars can be separated and unfolded for use. Conversely, the two sets of pry bars can be combined into a whole for convenient transportation.

[0009] Preferably, the two ends of the limiting groove are closed, and the inner wall of the limiting groove is in contact with the outer wall of the limiting rod to achieve a sliding connection. This ensures that the mounting screw and the threaded groove are connected without falling off, avoiding the loss of the mounting screw and increasing installation costs.

[0010] Preferably, the oiling assembly includes an oil cavity inside a square block disposed on both sides of the skid, and an oil outlet is provided at the bottom of the oil cavity. The oil outlet is connected to the threaded groove, and a movable plug is installed inside the oil outlet to block the oil outlet and prevent oil from flowing out when not needed.

[0011] Preferably, the oiling assembly further includes a vertical rod fixedly installed on the upper end of the plug, wherein the vertical rod extends through to the top of the square block, the vertical rod and the through opening are attached and slidably connected, and side blocks are fixedly installed on both sides of the vertical rod, and the vertical rod and the side blocks are slidably connected to the through opening and the side groove connected to the through opening. The side groove is set in the upper part of the square block, and the upper and lower ends of the side groove are closed. After the mounting screw rotates and connects with the threaded groove, the mounting screw moves to contact the inclined arc surface at the lower end of the plug and lifts the plug. In this way, the lubricating oil inside the oil cavity leaks out from the gap between the plug and the oil inlet, and drips onto the mounting screw to achieve lubrication.

[0012] Preferably, the oiling assembly further includes an annular groove II disposed inside the mounting screw, and the inner annular wall of the annular groove II is attached to the lower outer wall of the plug to achieve an annular rotational connection. After the mounting screw is fully connected to the threaded groove II, the plug is located inside the annular groove II, so that the plug and the oil outlet are in a sealed state to prevent continuous oil leakage.

[0013] Preferably, the elastic component includes a threaded sleeve that is threadedly connected to the top of the square blocks on both sides of the skid, and the threaded sleeve is elastically connected to the disc mounted on the top of the upright by a spring. The spring is tapered and movably fitted on the outer ring of the upright, and a sleeve rod is installed between the threaded sleeve and the disc. In this way, the block blocks seal the oil inlet in the initial state. When the block blocks are lifted, the spring is deformed by force. After the force applied to the block blocks disappears, the spring resets and pushes the upright to adjust the block blocks to reset and seal the oil inlet.

[0014] Preferably, the sleeve rod is composed of a thick rod and a thin rod that is movably fitted inside the thick rod, and the thin rod is slidably connected to the thick rod in a channel provided inside the thick rod, so as to ensure the stable and smooth up and down movement of the disc.

[0015] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0016] 1. The present invention integrates and installs core components such as pump set, gas dispenser, and control system inside the skid one, and connects and installs with LNG storage tank. If the components are removed, the installation screw is turned and threaded into the threaded groove two to achieve threaded connection. In this way, the two skids are combined into a whole, which is convenient for transportation. At the same time, the skid two provides encapsulation and protection for the components integrated and installed inside the skid one.

[0017] 2. After the mounting screw rotates and connects with the threaded groove, the rotation and position movement of the mounting screw can contact the inclined arc surface at the lower end of the plug and lift the plug. In this way, the lubricating oil inside the oil cavity leaks out from the gap between the plug and the oil inlet, and drips onto the mounting screw to achieve lubrication, ensuring the smooth installation and connection of the two sets of skids. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a perspective view of the overall structure of the present invention;

[0020] Figure 2This is a perspective view of the two-pryer assembly and connection structure of the present invention;

[0021] Figure 3 This is an exploded view of the internal structure of the mounting block of the present invention (partially cut out).

[0022] Figure 4 This is a perspective view of the internal structure of the oiling assembly of the present invention;

[0023] Figure 5 This is an exploded view of the connection structure between the oiling component and the elastic component of the present invention;

[0024] Figure 6 This is an exploded view of the elastic component connection structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the matching connection between the plug and the annular groove of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Skid 1; 2. Skid 2; 3. Square block; 4. Threaded groove 1; 5. Threaded groove 2; 6. Mounting screw; 7. Turning assembly; 701. Annular groove 1; 702. Annular block; 703. Limiting rod; 704. Limiting groove; 8. Oiling assembly; 801. Oil chamber; 802. Oil inlet; 803. Plug; 804. Annular groove 2; 805. Vertical rod; 806. Side block; 807. Side groove; 9. Elastic assembly; 901. Disc; 902. Sleeve rod; 903. Threaded sleeve; 904. Spring. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] This invention provides, for example Figure 1-7 An integrated LNG storage and refueling skid is shown, including a skid frame 1 and a skid frame 2 distributed parallel to the side of the skid frame 1. Square blocks 3 are fixedly installed on the sides of both the skid frame 1 and the skid frame 2. The two sets of square blocks 3 that can be fitted together on the sides of the skid frame 1 and the skid frame 2 are threadedly connected by mounting screws 6. The mounting screws 6 are threadedly connected to the threaded grooves 4 and 5 in the two sets of square blocks 3 that are fitted together on the sides of the skid frame 1 and the skid frame 2. The mounting screws 6 can be rotated inside the threaded groove 4 by a turning component 7. The mounting screws 6 can be oiled inside the threaded groove 5 by an oiling component 8. The oiling component 8 is controlled to open and close by an elastic component 9.

[0030] In use, rotating the mounting screw 6 causes it to shift position as it rotates, thus achieving threaded connection with threaded grooves 4 and 5. When the mounting screw 6 moves and separates from threaded groove 5, the two sets of skids can be separated and deployed for use. The core components, such as the pump unit, gas dispenser, and control system, are integrated inside skid 1 and are connected to the LNG storage tank. If these components are removed, rotating the mounting screw 6 and threaded groove 5 reconnects them, thus combining the two sets of skids into a single unit (see reference). Figure 2 This facilitates transportation, and the second skid provides encapsulation and protection for the internally integrated components of the first skid.

[0031] The rotating assembly 7 includes an annular groove 701 disposed inside and communicating with the threaded groove 4. An annular block 702 is rotatably mounted inside the annular groove 701. The annular block 702 protrudes from the square block 3. A limiting rod 703 fixedly connected to the inner wall of the annular block 702 is slidably connected to a limiting groove 704 on the mounting screw 6. The two ends of the limiting groove 704 are closed. The inner wall of the limiting groove 704 is in contact with the outer wall of the limiting rod 703 to achieve a sliding connection. This ensures that the mounting screw 6 and the threaded groove 4 are connected without falling off, avoiding the loss of the mounting screw 6 and the increase in installation costs.

[0032] The rotation of the annular block 702 drives the mounting screw 6 to rotate. As the mounting screw 6, which is threadedly connected to both threaded groove 4 and threaded groove 5, rotates, its position shifts. When the mounting screw 6 moves and separates from threaded groove 5, the two sets of pry bars can be separated and deployed for use. Conversely, the two sets of pry bars can be combined into a single unit for easy transport. Simultaneously, the sliding connection between the limiting rod 703 and the limiting groove 704 ensures that the mounting screw 6, which is threadedly connected to threaded groove 4, has room to move during rotation, guaranteeing that the rotation and movement of the mounting screw 6 are synchronized and do not obstruct each other. Furthermore, the fact that the connection between the limiting rod 703 and the limiting groove 704 remains intact indicates that the limiting rod 703, always located inside threaded groove 4, and the limiting groove 704 on the mounting screw 6 will not detach. This ensures that the mounting screw 6 and threaded groove 4 remain connected without affecting its normal operation, preventing the loss of the mounting screw 6 and increasing installation costs.

[0033] The oiling assembly 8 includes an oil cavity 801 located inside a square block 3 on the side of the second skid 2. An oil inlet 802 is located at the bottom of the oil cavity 801 and communicates with the second threaded groove 5. A movable plug 803 is installed inside the oil inlet 802 to block the oil inlet 802 and prevent unnecessary oil leakage. A vertical rod 805 is fixedly installed on the upper end of the plug 803, extending through to the top of the square block 3. The vertical rod 805 is slidably connected to the through-hole. Side blocks 806 are fixedly installed on both sides of the vertical rod 805, and the vertical rod 805 and side blocks 806 are slidably connected to the through-hole and a side groove 807 communicating with it, ensuring the stability of the vertical movement of the vertical rod 805. The side groove 807 is located within the upper part of the square block 3, and its upper and lower ends are closed.

[0034] After the mounting screw 6 rotates and connects with the threaded groove 5, the rotation and positional movement of the mounting screw 6 can contact the inclined arc-shaped surface at the lower end of the plug 803, lifting the plug 803. This allows the lubricating oil inside the oil chamber 801 to leak out from the gap between the plug 803 and the oil outlet 802, dripping onto the mounting screw 6 for lubrication. Furthermore, the oiling assembly 8 also includes an annular groove 804 located inside the mounting screw 6. The inner ring wall of the annular groove 804 is attached to the outer wall at the lower end of the plug 803, achieving an annular rotational connection. After the mounting screw 6 is fully connected to the threaded groove 5, the plug 803 is positioned inside the annular groove 804, thus sealing the plug 803 and the oil outlet 802 and preventing continuous oil leakage.

[0035] In the initial state, the limiting groove 704 will also lift the block 803 during rotation. After the mounting screw 6 rotates one revolution, the block 803 will be lifted and reset to close (when the lower end of the block 803 is inside the limiting groove 704, the block 803 is closed with the oil inlet 802, and when the lower end of the block 803 contacts the outer thread of the mounting screw 6, the block 803 is lifted). This enables intermittent oiling of the mounting screw 6. The annular groove 804 has a smooth arc-shaped edge, so that after the mounting screw 6 rotates and moves, the annular groove 804 can easily separate from the inverted, frustum-shaped block 803 in its active state.

[0036] The elastic component 9 includes a threaded sleeve 903 that is threaded to the top of the square block 3 on the side of the second pry bar 2. The threaded sleeve 903 and the disc 901 mounted on the top of the upright 805 are elastically connected by a spring 904. The spring 904 is tapered and is movably fitted on the outer ring of the upright 805. A sleeve rod 902 is installed between the threaded sleeve 903 and the disc 901. The sleeve rod 902 is composed of a thick rod and a thin rod that is movably fitted inside the thick rod. The thin rod is slidably connected up and down in a channel provided inside the thick rod to ensure the stable and smooth up and down movement of the disc 901.

[0037] In this initial state, the plug 803 blocks the oil inlet 802. When the plug 803 is lifted, the spring 904 deforms under force. After the force applied to the plug 803 disappears, the spring 904 returns to its original position, pushing the rod 805 to move the plug 803 back to its original position, thus blocking the oil inlet 802. The conical spring 904 offers higher stability. Later, as the elastic potential energy of the spring 904 weakens after prolonged use, the threaded sleeve 903 is twisted to make contact with the threaded connection between the threaded sleeve 903 and the square block 3, allowing the entire elastic component 9 to be removed. When installing a new elastic component 9, refer to... Figure 3 The installation method involves fitting the elastic component 9 onto the outer ring of the upright 805. Under the force of the spring 904, the disc 901 is always pressed against the top of the upright 805, which facilitates the operation of the aforementioned oiling component 8.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An integrated LNG storage and refueling skid, comprising a skid frame (1), characterized in that, A second pry bar (2) is distributed parallel to the side of the first pry bar (1), and square blocks (3) are fixedly installed on the sides of both the first pry bar (1) and the second pry bar (2). The two sets of square blocks (3) that can be fitted together on the sides of the first pry bar (1) and the second pry bar (2) are threadedly connected by a mounting screw (6). The mounting screw (6) is threadedly connected to the threaded grooves (4) and (5) in the two sets of square blocks (3) that are fitted together on the sides of the first pry bar (1) and the second pry bar (2). The mounting screw (6) is rotated inside the threaded groove (4) by a turning component (7). The mounting screw (6) is oiled inside the threaded groove (5) by an oiling component (8). The oiling component (8) is controlled to open and close by an elastic component (9).

2. The integrated LNG storage and refueling skid according to claim 1, characterized in that, The rotary assembly (7) includes an annular groove (701) disposed inside the threaded groove (4) and communicating with the threaded groove (4). An annular block (702) is rotatably mounted inside the annular groove (701). The annular block (702) protrudes from the square block (3) and is slidably connected to the limiting rod (703) fixedly connected to the inner annular wall of the annular block (702) and the limiting groove (704) provided on the mounting screw (6).

3. The integrated LNG storage and refueling skid according to claim 2, characterized in that, The two ends of the limiting groove (704) are closed, and the inner wall of the limiting groove (704) is attached to the outer wall of the limiting rod (703) to achieve a sliding connection.

4. The integrated LNG storage and refueling skid according to claim 1, characterized in that, The oiling assembly (8) includes an oil cavity (801) located inside a square block (3) on the side of the second skid (2), and an oil inlet (802) is provided at the bottom of the oil cavity (801). The oil inlet (802) is connected to the second threaded groove (5), and a movable plug (803) is installed inside the oil inlet (802).

5. An integrated LNG storage and refueling skid according to claim 4, characterized in that, The oiling assembly (8) also includes a vertical rod (805) fixedly installed on the upper end of the plug (803). The vertical rod (805) extends through to the top of the square block (3). The vertical rod (805) is attached to the through opening and slidably connected. Side blocks (806) are fixedly installed on both sides of the vertical rod (805). The vertical rod (805) and the side blocks (806) are slidably connected to the through opening and the side groove (807) connected to the through opening. The side groove (807) is set in the upper part of the square block (3). At the same time, the upper and lower ends of the side groove (807) are closed.

6. An integrated LNG storage and refueling skid according to claim 5, characterized in that, The oiling assembly (8) also includes an annular groove (804) disposed inside the mounting screw (6), and the inner annular wall of the annular groove (804) is attached to the lower outer wall of the block (803) to achieve an annular rotational connection.

7. An integrated LNG storage and refueling skid according to claim 5, characterized in that, The elastic component (9) includes a threaded sleeve (903) that is threaded to the top of the square block (3) on the side of the second pry bar (2), and the threaded sleeve (903) and the disc (901) mounted on the top of the upright (805) are elastically connected by a spring (904). The spring (904) is tapered and is movably fitted on the outer ring of the upright (805), and a sleeve rod (902) is installed between the threaded sleeve (903) and the disc (901).

8. An integrated LNG storage and refueling skid according to claim 7, characterized in that, The sleeve (902) is composed of a thick rod and a thin rod that is movably fitted inside the thick rod, and the thin rod is slidably connected to the thick rod in the channel provided inside the thick rod.

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