Liquefied natural gas sampler

Abstract

The utility model relates to the technical field of natural gas sampling, in particular to a liquefied natural gas sampler which comprises a sampler body, a sampling hose is fixedly connected onto the sampler body, one end, far away from the sampler body, of the sampling hose is fixedly connected with a sampling ball, a cavity is formed in the sampling ball, and the sampling ball is provided with a sampling hole. The sampling hose is communicated with the interior of the cavity, a sealing ring is fixedly mounted in the sampling hose, a sealing plate is arranged above the sealing ring, a floating plate is vertically and slidably mounted in the cavity through a supporting assembly, two supporting rods are vertically and fixedly mounted on the upper surface of the floating plate, and the upper ends of the two supporting rods are fixedly connected with the sealing plate. After sampling is finished, the floating plate can drive the sealing ring to make contact with the sealing plate to block one end of the sampling hose, and waste caused by outflow of liquefied natural gas inside the sampling hose after the sampling hose is taken out of a storage tank is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas sampling, in particular to a liquefied natural gas sampler. Background Art

[0002] Liquefied natural gas is recognized as the cleanest fossil energy on Earth. It is colorless, odorless, non-toxic and non-corrosive. After combustion, liquefied natural gas causes very little air pollution and releases a lot of heat. Therefore, liquefied natural gas is a relatively advanced energy source that can fundamentally improve environmental quality. In the manufacturing process of liquefied natural gas, in order to grasp the product quality of liquefied natural gas, it is necessary to use a sampler to take out a certain amount of samples from the storage tank for analysis.

[0003] A Chinese patent with publication number CN214702942U discloses a liquefied natural gas sampler, which includes a shell. The top end of the shell is fixedly connected to a connecting pipe, and the bottom end of the connecting pipe is fixedly connected to a storage bin. The storage bin passes through the bottom surface of the shell and is fixedly connected to the sampling tube. The storage bin is fixedly connected to the shell, which can prevent local damage to the two ends of the sampling tube due to long-term bending, thereby extending the service life of the sampling tube.

[0004] In the above-mentioned patent document, when sampling liquefied natural gas, one end of the sampling tube is inserted into the liquefied natural gas, and the liquefied natural gas is sucked into the storage tank through the suction force generated. However, after the sampling is completed, some liquefied natural gas will remain in the sampling tube. After the sampling tube is taken out of the storage tank, the liquefied natural gas in the sampling tube will spill out, causing waste. Utility Model Content

[0005] The purpose of the present utility model is to solve the following shortcomings in the prior art: there will be some liquefied natural gas in the sampling tube, and after the sampling tube is taken out from the storage tank, the liquefied natural gas in the sampling tube will be spilled, causing waste, and a liquefied natural gas sampler is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A liquefied natural gas sampler comprises a sampler body, a sampling hose fixedly connected to the sampler body, a sampling sphere fixedly connected to one end of the sampling hose remote from the sampler body, a cavity defined within the sampling sphere, the sampling hose communicating with the cavity, and a plurality of liquid inlet holes defined on a surface of the sampling sphere, each communicating with the cavity.

[0008] A sealing ring is fixedly installed in the sampling hose, and a sealing plate is provided above the sealing ring. A floating plate is vertically slidably installed in the cavity through a supporting assembly. Two support rods are vertically fixedly installed on the upper surface of the floating plate. The upper ends of the two support rods are fixedly connected to the sealing plate. A protective assembly for protecting the sampling sphere is provided on the surface of the sampling sphere.

[0009] Preferably, the support assembly includes a vertical rod fixedly installed in the cavity and a stopper fixedly installed on the upper end of the vertical rod, and the floating plate is vertically slidably sleeved on the vertical rod.

[0010] Preferably, a counterweight block is fixedly sleeved on the vertical rod, and the mass of the counterweight block is much greater than the mass of the sampling sphere.

[0011] Preferably, a telescopic spring is sleeved on the vertical rod, and two ends of the telescopic spring are fixedly connected to the counterweight block and the floating plate respectively.

[0012] Preferably, the protection assembly includes two protective covers that are symmetrically mounted on the sampling sphere through a torsion component, two support rods respectively fixedly mounted on the two protective covers, and two floats respectively fixedly mounted on one end of the two support rods, and both protective covers are provided with semicircular holes.

[0013] Preferably, the torsion component includes a support block fixedly mounted on the sampling sphere, a rotating shaft rotatably mounted on the support block, and two torsion springs symmetrically sleeved on the rotating shaft, both ends of the rotating shaft are fixedly connected to the protective cover, and the two ends of the torsion spring are respectively fixedly connected to the protective cover and the support block.

[0014] In the utility model, the beneficial effects are:

[0015] 1. During the sampling process, the sampling sphere is placed in the liquefied natural gas. Under the action of buoyancy, the floating plate will drive the sealing ring and the sealing plate to separate through the support rod, and the liquefied natural gas can enter the sampling hose. After the sampling is completed, the floating plate will drive the sealing ring and the sealing plate to contact, blocking one end of the sampling hose, preventing the liquefied natural gas inside from flowing out when the sampling hose is taken out of the storage tank, causing waste;

[0016] 2. When the sampling sphere is not in use, the protective cover will protect the sampling float under the action of the torsion component to avoid damage to the sampling sphere and extend the service life of the sampling sphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a liquefied natural gas sampler proposed in the utility model;

[0018] Figure 2 A schematic diagram of the closed three-dimensional structure of the sampling hose, sampling sphere and protective cover;

[0019] Figure 3 Schematic diagram of the three-dimensional structure with the sampling hose, sampling sphere and protective cover opened;

[0020] Figure 4 It is a schematic diagram of the front view three-dimensional cross-section structure of the sampling sphere;

[0021] Figure 5 It is a schematic diagram of the bottom-up three-dimensional cross-sectional structure of the sampling sphere;

[0022] Figure 6 for Figure 2 A magnified view of the structure in the middle.

[0023] In the figure: 1 sampler body, 2 sampling hose, 3 sampling sphere, 4 sealing ring, 5 sealing plate, 6 floating plate, 7 support rod, 8 liquid inlet, 9 vertical rod, 10 stopper, 11 counterweight, 12 telescopic spring, 13 protective cover, 14 support rod, 15 float, 16 support block, 17 rotating shaft, 18 torsion spring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Reference Figures 1-6 A liquefied natural gas sampler includes a sampler body 1, a sampling hose 2 is fixedly connected to the sampler body 1, a sampling sphere 3 is fixedly connected to the end of the sampling hose 2 away from the sampler body 1, a cavity is defined inside the sampling sphere 3, the sampling hose 2 is connected to the inside of the cavity, and a plurality of liquid inlet holes 8 are defined on the surface of the sampling sphere 3, all of which are connected to the cavity.

[0026] When the sampler is sampling, the sampling sphere 3 is placed in the liquefied natural gas, and then the liquefied natural gas is sucked into the sampler body 1 through the sampling hose 2 to complete the sampling.

[0027] A sealing ring 4 is fixedly installed in the sampling hose 2, and a sealing plate 5 is provided above the sealing ring 4. A floating plate 6 is vertically slidably installed in the cavity through a supporting assembly. Two support rods 7 are vertically fixedly installed on the upper surface of the floating plate 6. The upper ends of the two support rods 7 are fixedly connected to the sealing plate 5. The surface of the sampling sphere 3 is provided with a protection assembly for protecting itself. The supporting assembly includes a vertical rod 9 vertically fixedly installed in the cavity and a stopper 10 fixedly installed on the upper end of the vertical rod 9. The floating plate 6 is vertically slidably sleeved on the vertical rod 9. A counterweight 11 is fixedly sleeved on the vertical rod 9. The mass of the counterweight 11 is much greater than the mass of the sampling sphere 3. A telescopic spring 12 is sleeved on the vertical rod 9. The two ends of the telescopic spring 12 are respectively fixedly connected to the counterweight 11 and the floating plate 6.

[0028] The vertical rod 9 supports the floating plate 6 , and the floating plate 6 can move vertically up and down in the cavity. The stopper 10 can prevent the floating plate 6 from detaching from the vertical rod 9 .

[0029] The setting of the counterweight 11 facilitates the sinking of the sampling sphere 3 into the liquefied natural gas. The density of the floating plate 6 is lower than that of the liquefied natural gas. In the initial state, under the action of the elastic force of the telescopic spring 12, the floating plate 6 tends to move vertically downward, and then the sealing plate 5 is brought into contact with the sealing ring 4 through the support rod 7. The sampling hose 2 can be blocked by the sealing ring 4 and the sealing plate 5. When the sampling sphere 3 is put into the liquefied natural gas, the buoyancy is greater than the elastic force of the telescopic spring 12. Under the action of the buoyancy, the floating plate 6 will move vertically upward, and then the sealing plate 5 is driven to separate from the sealing ring 4 through the support rod 7. At this time, the liquefied natural gas can pass through the sealing ring 4 and enter the sampling hose 2. When the sampling sphere 3 is taken out of the liquefied natural gas, under the action of the elastic force of the telescopic spring 12, the sealing plate 5 moves toward the sealing ring 4 until the sealing plate 5 contacts the sealing ring 4, thereby blocking one end of the sampling hose 2 again, preventing the liquefied natural gas inside from flowing out after the sampling hose 2 is taken out of the storage tank, causing waste.

[0030] The protection assembly includes two protective covers 13 that are symmetrically mounted on the sampling sphere 3 through a torsion component, two support rods 14 that are respectively fixedly mounted on the two protective covers 13, and two floats 15 that are respectively fixedly mounted on one end of the two support rods 14. Semicircular holes are provided on both protective covers 13. The torsion component includes a support block 16 that is fixedly mounted on the sampling sphere 3, a rotating shaft 17 that is rotatably mounted on the support block 16, and two torsion springs 18 that are symmetrically sleeved on the rotating shaft 17. Both ends of the rotating shaft 17 are fixedly connected to the protective covers 13, and both ends of the torsion spring 18 are respectively fixedly connected to the protective cover 13 and the support block 16.

[0031] Under the action of the torsion force of the torsion spring 18, the two protective covers 13 tend to rotate closer to each other. When the two protective covers 13 are in contact, the sampling sphere 3 is protected inside the two protective covers 13 to prevent the sampling sphere 3 from being damaged and extend the service life of the sampling sphere 3. When the sampling sphere 3 is put into liquefied natural gas, the density of the two floats 15 is lower than that of the liquefied natural gas. Therefore, when the floats 15 enter the liquefied natural gas, they will be subjected to a vertical upward buoyancy. Under the action of the buoyancy, the two protective covers 13 will rotate away from each other, and the torsion spring 18 will be deformed.

[0032] In the present invention, when sampling, when the sampling sphere 3 is put into the liquefied natural gas, the floating plate 6 will move vertically upward under the action of buoyancy, and then drive the sealing plate 5 to separate from the sealing ring 4 through the support rod 7. At this time, the liquefied natural gas can pass through the sealing ring 4 and enter the sampling hose 2. When the sampling sphere 3 is taken out from the liquefied natural gas, the sealing plate 5 will move toward the sealing ring 4 under its own gravity until the sealing plate 5 contacts the sealing ring 4, thereby blocking one end of the sampling hose 2 again, preventing the liquefied natural gas inside from flowing out after the sampling hose 2 is taken out from the storage tank, causing waste.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A liquefied natural gas sampler, comprising a sampler body (1), characterized in that: The sampler body (1) is fixedly connected to a sampling hose (2), and one end of the sampling hose (2) away from the sampler body (1) is fixedly connected to a sampling sphere (3), a cavity is provided inside the sampling sphere (3), the sampling hose (2) is connected to the inside of the cavity, and a plurality of liquid inlet holes (8) are provided on the surface of the sampling sphere (3), all of which are connected to the cavity; A sealing ring (4) is fixedly installed in the sampling hose (2), a sealing plate (5) is provided above the sealing ring (4), a floating plate (6) is vertically slidably installed in the cavity through a support assembly, two support rods (7) are vertically fixedly installed on the upper surface of the floating plate (6), and the upper ends of the two support rods (7) are fixedly connected to the sealing plate (5), and a protective assembly for protecting the sampling sphere (3) is provided on the surface of the sampling sphere (3).

2. A liquefied natural gas sampler according to claim 1, characterized in that: The support assembly comprises a vertical rod (9) fixedly mounted in the cavity and a stopper (10) fixedly mounted on the upper end of the vertical rod (9); the floating plate (6) is vertically slidably sleeved on the vertical rod (9).

3. A liquefied natural gas sampler according to claim 2, characterized in that: A counterweight (11) is fixedly sleeved on the vertical rod (9), and the mass of the counterweight (11) is much greater than the mass of the sampling sphere (3).

4. A liquefied natural gas sampler according to claim 3, characterized in that: A telescopic spring (12) is sleeved on the vertical rod (9), and two ends of the telescopic spring (12) are fixedly connected to the counterweight (11) and the floating plate (6) respectively.

5. The liquefied natural gas sampler according to claim 1, characterized in that: The protection assembly comprises two protection covers (13) symmetrically mounted on the sampling sphere (3) via a torsion component, two support rods (14) respectively fixedly mounted on the two protection covers (13), and two floating balls (15) respectively fixedly mounted on one end of the two support rods (14), wherein the two protection covers (13) are both provided with a semicircular hole.

6. A liquefied natural gas sampler according to claim 5, characterized in that: The torsion component comprises a support block (16) fixedly mounted on the sampling sphere (3), a rotating shaft (17) rotatably mounted on the support block (16), and two torsion springs (18) symmetrically sleeved on the rotating shaft (17), wherein both ends of the rotating shaft (17) are fixedly connected to the protective cover (13), and both ends of the torsion spring (18) are fixedly connected to the protective cover (13) and the support block (16), respectively.

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