Adjusting mechanism for adjusting pressure of liquefied natural gas storage tank

Abstract

The utility model discloses a regulating mechanism for regulating the pressure of a liquefied natural gas storage tank, which comprises an outer tank body and an inner tank body, a natural gas pressure relief cavity is arranged between the outer tank body and the inner tank body, a regulating mechanism is arranged on the outer tank body, a regulating cylinder is fixed on the outer tank body, the top end of the regulating cylinder extends to the outer side of the outer tank body, and the bottom end of the regulating cylinder is communicated with the inner tank body. One side of the interior of the adjusting cylinder communicates with a pressure relief opening communicated with the interior of the natural gas pressure relief cavity, a limiting block located below the pressure relief opening is installed in the adjusting cylinder, a second piston and a first piston which are in sliding connection with the adjusting cylinder are arranged above the limiting block, the first piston is rotationally connected with an adjusting bolt, and the adjusting bolt is in threaded connection with the adjusting cylinder; the top end of the second piston is fixedly connected with a guide rod, the guide rod is sleeved with a spring and slidably connected with the first piston, a flowmeter is installed at the pressure relief opening, and a pressure sensor is installed at the bottom end of the second piston. According to the utility model, the pressure for opening the pressure relief opening by the second piston is adjusted by screwing in and out the adjusting bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas storage, and particularly relates to a regulating mechanism for regulating the pressure of a liquefied natural gas storage tank. Background Technique

[0002] At present, during the process of liquefied gas exploitation and transportation, storage tanks are often required to store LNG (liquefied natural gas). LNG is obtained by compressing and cooling natural gas to its boiling point temperature to become a liquid, which is convenient for transportation and is re-gasified during use.

[0003] During the storage process of natural gas, the internal air pressure may change. For example, collisions or an increase in the storage environment temperature will cause the internal air pressure to rise, posing a risk of damage and leakage to the LNG storage tank. Content of the Utility Model

[0004] The purpose of this application is to provide a regulating mechanism for regulating the pressure of a liquefied natural gas storage tank to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, this application provides the following technical solution: A regulating mechanism for regulating the pressure of a liquefied natural gas storage tank, including an outer tank body and an inner tank body. The outer tank body is fixedly installed outside the inner tank body. A natural gas pressure relief chamber is provided between the outer tank body and the inner tank body. A regulating mechanism is fixedly installed on the outer tank body. The regulating mechanism includes a regulating cylinder, a first piston, a second piston, a guide rod, a spring, a regulating bolt, a limiting block, a pressure sensor, and a flow meter. The regulating cylinder is fixed on the outer tank body and its top end extends to the outside of the outer tank body, and its bottom end communicates with the inner tank body. One side inside the regulating cylinder communicates with a pressure relief port leading to the inside of the natural gas pressure relief chamber. A limiting block is fixedly installed inside the regulating cylinder below the pressure relief port. Above the limiting block, there are a second piston and a first piston that are slidably connected to the regulating cylinder. The first piston is rotatably connected to a regulating bolt, and the regulating bolt is threadedly connected to the regulating cylinder. The top end of the second piston is fixedly connected to a guide rod, and a spring is sleeved on the guide rod. The guide rod is slidably connected to the first piston. A flow meter is fixedly installed at the pressure relief port, and a pressure sensor is fixedly installed at the bottom end of the second piston.

[0006] Preferably, a natural gas inlet and a first natural gas outlet are respectively communicated at the top end and the bottom end of the inner tank body, and valves are installed on the natural gas inlet and the first natural gas outlet.

[0007] Preferably, a second natural gas outlet communicating with the natural gas pressure relief chamber is provided at the bottom end of the outer tank body, and a valve is installed on the second natural gas outlet.

[0008] Preferably, a display for showing the data of the pressure sensor and the flowmeter is fixedly installed on one side of the outer tank body.

[0009] Preferably, a power supply is fixedly installed on one side of the outer tank body.

[0010] In summary, the technical effects and advantages of the present utility model are as follows:

[0011] In the present utility model, by screwing in and out the adjusting bolt to adjust the pressure of the first piston on the spring, the extrusion pressure on the second piston is changed through the change of the spring pressure, and the pressure inside the inner tank body is released by pushing open the second piston to expose the pressure relief port. Therefore, the storage pressure of natural gas is adjusted by adjusting the pressing force on the second piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic installation diagram of the adjusting mechanism for adjusting the pressure of the liquefied natural gas storage tank in the embodiment of the present application;

[0014] Figure 2 It is a schematic structural diagram of the adjusting mechanism for adjusting the pressure of the liquefied natural gas storage tank in the embodiment of the present application.

[0015] In the figure: 1. Outer tank body; 2. Inner tank body; 3. Natural gas pressure relief cavity; 4. Adjusting cylinder; 5. First piston; 6. Second piston; 7. Guide rod; 8. Spring; 9. Adjusting bolt; 10. Pressure relief port; 11. Limiting block; 12. Pressure sensor; 13. Flowmeter; 14. Power supply; 15. Display; 16. Natural gas inlet; 17. First natural gas outlet; 18. Second natural gas outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] It should also be noted that the standard parts used in this application document can all be purchased from the market, and can also be customized according to the description in the specification and the drawings. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. And, without clear limitation, the machinery, parts and equipment can all adopt the conventional models in the prior art.

[0019] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device comprising the said elements.

[0020] Example: Refer to Figure 1-2The regulating mechanism for regulating the pressure of a liquefied natural gas storage tank shown in the figure includes an outer tank body 1 and an inner tank body 2. The outer tank body 1 is fixedly installed by sleeving outside the inner tank body 2. A natural gas pressure relief chamber 3 is provided between the outer tank body 1 and the inner tank body 2. A regulating mechanism is fixedly installed on the outer tank body 1. The regulating mechanism includes a regulating cylinder 4, a first piston 5, a second piston 6, a guide rod 7, a spring 8, a regulating bolt 9, a limit block 11, a pressure sensor 12 and a flowmeter 13. The regulating cylinder 4 is fixed on the outer tank body 1 and its top end extends to the outside of the outer tank body 1, and its bottom end communicates with the inner tank body 2. One side inside the regulating cylinder 4 communicates with a pressure relief port 10 leading to the inside of the natural gas pressure relief chamber 3. A limit block 11 is fixedly installed inside the regulating cylinder 4 below the pressure relief port 10. Above the limit block 11, there are a second piston 5 and a first piston 6 that are slidably connected to the regulating cylinder 4. The first piston 5 is rotatably connected to a regulating bolt 9, and the regulating bolt 9 is threadedly connected to the regulating cylinder 4. The top end of the second piston 6 is fixedly connected to a guide rod 7. A spring 8 is sleeved on the guide rod 7. The guide rod 7 is slidably connected to the first piston 5. A flowmeter 13 is fixedly installed at the pressure relief port 10. A pressure sensor 12 is fixedly installed at the bottom end of the second piston 6. By screwing the regulating bolt in and out, the pressure of the first piston on the spring is adjusted. By changing the spring pressure, the extrusion pressure on the second piston is changed. The pressure inside the inner tank body is released by pushing open the second piston to expose the pressure relief port. Therefore, by adjusting the pressing force on the second piston, the storage pressure of natural gas is regulated. The pressure sensor 12 can detect the pressure received by the second piston, and the flowmeter can detect the liquid or gas discharge flow rate at the pressure relief port, so as to judge whether the inner tank body is discharging pressure at this time to achieve pressure balance. When the pressure is balanced, the second piston blocks the pressure relief port, and the natural gas in the inner tank body is stored at this pressure. Through the pressure sensor and the flowmeter, the operator can be assisted to adjust the regulating bolt so that the internal storage of the inner tank body reaches the specified pressure value range. After the pressure is balanced, when the internal pressure of the natural gas in the inner tank body increases due to changes in the external environment, the natural gas will push the second piston to expose the pressure relief port, and the excess natural gas will be discharged from the pressure relief port to achieve constant pressure storage.

[0021] With the above structure: The top end and the bottom end of the inner tank body 2 are respectively communicated with a natural gas liquid inlet 16 and a first natural gas liquid outlet 17. Valves are installed on the natural gas liquid inlet 16 and the first natural gas liquid outlet 17 to facilitate the control of liquid inlet and liquid discharge.

[0022] With the above structure: The bottom end of the outer tank body 1 is provided with a second natural gas liquid outlet 18 communicated with the natural gas pressure relief chamber 3. A valve is installed on the second natural gas liquid outlet 18 to facilitate the control of liquid discharge and the recovery of the released natural gas inside.

[0023] With the above structure, a display for showing the data of the pressure sensor 12 and the flow meter 13 is fixedly installed on one side of the outer tank body 1 for easy reading.

[0024] With the above structure, a power supply 14 is fixedly installed on one side of the outer tank body 1 to supply power to each electrical device.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A regulating mechanism for regulating the pressure of a liquefied natural gas storage tank, comprising an outer tank body (1) and an inner tank body (2), characterized in that: An outer tank (1) is fixedly installed by sleeving outside the inner tank (2). A natural gas pressure relief chamber (3) is provided between the outer tank (1) and the inner tank (2). An adjusting mechanism is fixedly installed on the outer tank (1). The adjusting mechanism includes an adjusting cylinder (4), a first piston (5), a second piston (6), a guide rod (7), a spring (8), an adjusting bolt (9), a limit block (11), a pressure sensor (12) and a flow meter (13). The adjusting cylinder (4) is fixed on the outer tank (1) and its top end extends to the outside of the outer tank (1), and its bottom end communicates with the inner tank (2). One side inside the adjusting cylinder (4) communicates with a pressure relief port (10) leading to the inside of the natural gas pressure relief chamber (3). A limit block (11) is fixedly installed inside the adjusting cylinder (4) below the pressure relief port (10). Above the limit block (11), there are a second piston (6) and a first piston (5) that are slidably connected to the adjusting cylinder (4). The first piston (5) is rotatably connected to an adjusting bolt (9), and the adjusting bolt (9) is threadedly connected to the adjusting cylinder (4). The top end of the second piston (6) is fixedly connected to a guide rod (7). A spring (8) is sleeved on the guide rod (7). The guide rod (7) is slidably connected to the first piston (5). A flow meter (13) is fixedly installed at the pressure relief port (10). A pressure sensor (12) is fixedly installed at the bottom end of the second piston (6).

2. The regulating mechanism for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: The top end and the bottom end of the inner tank (2) are respectively communicated with a natural gas inlet (16) and a first natural gas outlet (17). Valves are installed on the natural gas inlet (16) and the first natural gas outlet (17).

3. The regulating mechanism for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: The bottom end of the outer tank (1) is provided with a second natural gas outlet (18) that communicates with the natural gas pressure relief chamber (3). A valve is installed on the second natural gas outlet (18).

4. The regulating mechanism for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: A display for showing the data of the pressure sensor (12) and the flow meter (13) is fixedly installed on one side of the outer tank (1).

5. The regulating mechanism for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: A power supply (14) is fixedly installed on one side of the outer tank (1).

Images