Sampling equipment for liquefied natural gas detection

Abstract

The utility model relates to the technical field of liquefied natural gas detection, in particular to sampling equipment for liquefied natural gas detection. The sampling equipment for liquefied natural gas detection comprises a sampler, a pressure pump, a control panel and an interface, the pressure pump is assembled on the top of the sampler, the control panel is installed on the front side of the sampler, the sampler and the pressure pump are both electrically connected with the control panel, the interface is connected to the bottom of the sampler, and the interface is connected with the pressure pump. The utility model relates to a field joint for butting a liquefied gas storage tank or a pipeline system. The device can stably clamp the pipeline joint through a positioning assembly composed of a guide rod, a moving block, a first spring, a pressing plate and a second spring, provides a reliable positioning and fixing effect, ensures the stability of the device in the sampling process, reduces shaking and displacement, and guarantees the sampling accuracy.

Description

A sampling device for liquefied natural gas detection Technical Field

[0001] This utility model relates to the field of liquefied natural gas detection technology, and in particular to a sampling device for liquefied natural gas detection. Background Technology

[0002] In the field of liquefied natural gas (LNG) testing, the accurate and efficient acquisition of representative samples is crucial for the reliability of subsequent test results. The main connection structure of the sampling equipment, as the foundation of the entire system, directly impacts the smooth operation of the sampling process. However, in practice, due to the cryogenic characteristics of LNG and potential irregularities at pipeline joints, traditional sampling equipment often struggles to provide sufficient stability to guarantee sampling accuracy.

[0003] Traditional sampling devices often lack effective fixing mechanisms, making them prone to shaking or displacement during sampling. This not only affects sampling accuracy but can also create safety hazards. The stability and reliability of the equipment are particularly important when sampling LNG under high pressure and cryogenic conditions. Furthermore, pipe joints of different diameters and shapes increase the complexity of the sampling process, requiring sampling equipment with good adaptability and flexibility. Summary of the Invention

[0004] To overcome the aforementioned shortcomings, the technical problem to be solved is to provide a sampling device for liquefied natural gas detection.

[0005] Technical Solution: A sampling device for liquefied natural gas (LNG) testing includes a sampler, a pressure pump, a control panel, and an interface. The pressure pump is mounted on the top of the sampler, and the control panel is installed on the front side of the sampler. Both the sampler and the pressure pump are electrically connected to the control panel. The interface is connected to the bottom of the sampler for connecting to a field joint of an LNG storage tank or pipeline system. The device also includes a moving block, a fixed frame, guide rods, a first spring, a second spring, a pressure plate, and a drive assembly. The fixed frame is connected to the sampler above the interface. Guide rods are symmetrically connected to both sides of the fixed frame. A moving block is slidably connected between the two guide rods on each side, and the moving block is also slidably connected to the fixed frame. A first spring is sleeved on each guide rod, and the two ends of the first spring are connected to the moving block and the fixed frame, respectively. A pressure plate is slidably connected to the inside of each moving block, and two second springs are connected between the pressure plate and the moving block.

[0006] In one embodiment, the portion of the inner side of the pressure plate that contacts the pipe joint is designed to be corrugated.

[0007] In one embodiment, the sampler also includes longitudinal guide rails and a pressure frame. The sampler is connected to longitudinal guide rails on both the upper left and right sides, and a pressure frame is slidably connected to each longitudinal guide rail. The inner side of the pressure frame is tightly fitted to the outer wall of the sampler.

[0008] In one embodiment, the lower end of the pressure frame has a triangular structure, and the inclined surface of its inner side contacts and engages with the moving block.

[0009] In one embodiment, a locking knob and a screw are also included. The upper side of the lower pressure frame is threadedly connected to the screw, and the outer side of the screw is connected to the locking knob. The inner side of the screw can abut against the longitudinal guide rail to fix and adjust the position of the lower pressure frame.

[0010] In one embodiment, the sampler also includes a natural gas detector and an alarm light. The natural gas detector is installed in a socket at the lower end of the sampler, and alarm lights are symmetrically installed on the left and right sides of the front of the natural gas detector. Both the natural gas detector and the alarm lights are electrically connected to the control panel.

[0011] The present invention has the following advantages: 1. The positioning assembly consisting of a guide rod, a moving block, a first spring, a pressure plate, and a second spring can stably clamp the pipe joint, provide a reliable positioning and fixing effect, ensure the stability of the equipment during the sampling process, reduce shaking and displacement, and ensure the accuracy of sampling.

[0012] 2. The longitudinal guide rail, lower pressure frame, and screw structure facilitate operators in adjusting the position of the lower pressure frame to adapt to pipe joints of different diameters. After the position is fixed, it can ensure the stability of the moving block and pressure plate when fixing the pipe opening, thus improving the convenience and adaptability of operation.

[0013] 3. A safety detection component consisting of a natural gas detector and an alarm light monitors in real time whether there is a liquefied natural gas leak in the liquefied gas storage tank or pipeline system. Once a leak is detected, it can quickly issue a warning through the alarm light so that the sampling channel can be disconnected in time and the problem can be dealt with, effectively ensuring the safety of personnel and the environment. Attached Figure Description

[0014] Figure 1 is a three-dimensional structural diagram of this utility model.

[0015] Figure 2 is a three-dimensional structural diagram of the control panel, natural gas detector, and alarm light of this utility model.

[0016] Figure 3 is a three-dimensional structural diagram of the guide rod, the first spring, and the fixing frame of this utility model.

[0017] Figure 4 is a three-dimensional structural diagram of the second spring, the moving block, and the pressure plate of this utility model.

[0018] In the attached diagram, the following are the reference numerals: 1. Sampler, 2. Pressure pump, 3. Longitudinal guide rail, 4. Lower pressure frame, 5. Locking knob, 6. Screw, 7. Control panel, 8. Natural gas detector, 9. Alarm light, 10. Interface, 11. Moving block, 12. Fixing frame, 13. Guide rod, 14. First spring, 16. Second spring, 18. Pressure plate. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] Example: A sampling device for liquefied natural gas (LNG) testing, as shown in Figures 1-4, includes a sampler 1, a pressure pump 2, a control panel 7, an interface 10, a moving block 11, a fixed frame 12, a guide rod 13, a first spring 14, a second spring 16, a pressure plate 18, and a drive assembly. The pressure pump 2 is mounted on the top of the sampler 1, and the control panel 7 is installed on the front side of the sampler 1. Both the sampler 1 and the pressure pump 2 are electrically connected to the control panel 7. The interface 10 is connected to the bottom of the sampler 1 for connecting to the field joint of an LNG storage tank or pipeline system. A fixed frame is connected to the sampler 1 above the interface 10. The frame 12 has guide rods 13 symmetrically welded on both sides. A movable block 11 is slidably connected between the two guide rods 13 on each side, and the movable block 11 is also slidably connected to the fixed frame 12. A first spring 14 is sleeved on each guide rod 13. The left and right ends of the first spring 14 are connected to the movable block 11 and the fixed frame 12 respectively. A pressure plate 18 for clamping the pipe joint is slidably connected to the inner side of the movable block 11. Two second springs 16 are connected between the pressure plate 18 and the movable block 11. The part of the inner side of the pressure plate 18 that contacts the pipe joint is designed with a corrugated surface to achieve a better fit and clamping effect.

[0021] As shown in Figures 1 and 2, the sampler also includes a longitudinal guide rail 3, a lower pressure frame 4, a locking knob 5, and a screw 6. The upper left and right sides of the sampler 1 are welded with longitudinal guide rails 3, and the lower pressure frame 4 is slidably connected to the longitudinal guide rails 3. The inner side of the lower pressure frame 4 is tightly attached to the outer wall of the sampler 1. The lower end of the lower pressure frame 4 has a triangular structure, and the inclined surface of its inner side contacts and cooperates with the moving block 11. The upper side of the lower pressure frame 4 is threadedly connected with a screw 6, and the outer side of the screw 6 is connected with a locking knob 5. The inner side of the screw 6 can abut against the longitudinal guide rail 3 to fix and adjust the position of the lower pressure frame 4. When it is necessary to move the lower pressure frame 4, first turn the locking knob 5 to drive the screw 6 to rotate and move outward so that it no longer abuts against the longitudinal guide rail 3, and the lower pressure frame 4 can be moved normally. After use, turn the locking knob 5 in the opposite direction to drive the screw 6 to rotate and move inward to abut against the longitudinal guide rail 3, so that the lower pressure frame 4 can be fixed by friction.

[0022] When sampling liquefied natural gas (LNG), first connect the on-site joint of the LNG storage tank or pipeline system to interface 10. Then, push the lower pressure frame 4 downward. The triangular structure at the lower end of the lower pressure frame 4 uses the inclined plane to push the moving block 11 inward along the guide rod 13 and the fixed frame 12, causing the pressure plate 18 to move synchronously. The first spring 14 is compressed, and the pressure plate 18 gradually approaches the pipeline joint and clamps the joint. The second spring 16 provides clamping force and buffering force, thereby positioning and fixing the sampler 1 as a whole. After fixing, turn the locking knob 5 to move the screw 6 inward, so that it abuts against the longitudinal guide rail 3, fixing the position of the lower pressure frame 4. Then, open the sampling valve of the LNG storage tank or pipeline system to provide a channel for LNG to flow out to the sampling system. Operate the control panel 7 to open the valve body of the sampler 1, so that the sampler 1 is connected to the sampling pipeline. At this point, utilizing the principle of pressure balance, under equal pressure, liquefied natural gas flows into the storage chamber inside the sampler to acquire the sample. Pressure pump 2 monitors the pressure value during the sampling process in real time to ensure stable sampling. After sampling, the relevant valves are closed, screw 6 is loosened, and the lower pressure frame 4 is pushed upwards to reset. The first spring 14 rebounds, causing the moving block 11 and pressure plate 18 to move outwards to reset, and the second spring 16 returns to its original state. Finally, the sampler 1 is removed from the pipe joint, completing the entire sampling process.

[0023] As shown in Figure 2, the sampler also includes a natural gas detector 8 and an alarm light 9. The natural gas detector 8 is installed in a socket-type manner at the lower end of the sampler 1. The alarm lights 9 are symmetrically installed on the left and right sides of the front of the natural gas detector 8 by bolts. Both the natural gas detector 8 and the alarm lights 9 are electrically connected to the control panel 7. During the natural gas sampling operation, the natural gas detector 8 detects in real time whether there is a liquefied natural gas leak in the liquefied gas storage tank or pipeline system. If a leak is detected, the natural gas detector 8 sends a signal to the control panel 7, and the control panel 7 controls the alarm light 9 to light up. At this time, the sampling channel needs to be quickly disconnected and the leak problem needs to be dealt with. After the problem is solved, the alarm light 9 can be turned off through the control panel 7.

[0024] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation in order to cover all variations and equivalent structures and functions.

Claims

1. A sampling device for liquefied natural gas (LNG) testing, comprising a sampler (1), a pressure pump (2), a control panel (7), and an interface (10), wherein the pressure pump (2) is mounted on the top of the sampler (1), the control panel (7) is mounted on the front side of the sampler (1), and both the sampler (1) and the pressure pump (2) are electrically connected to the control panel (7), and the interface (10) is connected to the bottom of the sampler (1) for connecting to a field joint of an LNG storage tank or pipeline system, characterized in that: It also includes a moving block (11), a fixed frame (12), a guide rod (13), a first spring (14), a second spring (16), a pressure plate (18), and a drive assembly. The fixed frame (12) is connected to the sampler (1) above the interface (10). The fixed frame (12) is symmetrically connected to both sides of the fixed frame (12). The moving block (11) is slidably connected between the two guide rods (13) on each side. The moving block (11) is also slidably connected to the fixed frame (12). The first spring (14) is sleeved on the guide rod (13). The two ends of the first spring (14) are connected to the moving block (11) and the fixed frame (12) respectively. The pressure plate (18) is slidably connected to the inside of the moving block (11). Two second springs (16) are connected between the pressure plate (18) and the moving block (11).

2. The sampling device for liquefied natural gas detection as described in claim 1, characterized in that: The part of the inner side of the pressure plate (18) that contacts the pipe joint is designed to be corrugated.

3. The sampling device for liquefied natural gas detection as described in claim 2, characterized in that: It also includes a longitudinal guide rail (3) and a pressure frame (4). The upper sides of the sampler (1) are connected to the longitudinal guide rail (3), and the pressure frame (4) is slidably connected to the longitudinal guide rail (3). The inner side of the pressure frame (4) is tightly attached to the outer wall of the sampler (1).

4. The sampling device for liquefied natural gas detection as described in claim 3, characterized in that: The lower end of the pressure frame (4) is a triangular structure, and the inclined surface of its inner side contacts and engages with the moving block (11).

5. The sampling device for liquefied natural gas detection as described in claim 4, characterized in that: It also includes a locking knob (5) and a screw (6). The upper side of the lower pressure frame (4) is threaded with a screw (6), and the outer side of the screw (6) is connected with a locking knob (5). The inner side of the screw (6) can abut against the longitudinal guide rail (3) to fix and adjust the position of the lower pressure frame (4).

6. The sampling device for liquefied natural gas detection as described in claim 5, characterized in that: It also includes a natural gas detector (8) and an alarm light (9). The sampler (1) is fitted with a natural gas detector (8) in a socket-type manner. The alarm light (9) is symmetrically installed on the front side of the natural gas detector (8). The natural gas detector (8) and the alarm light (9) are both electrically connected to the control panel (7).

Images