Liquefied natural gas sampler

Abstract

The utility model discloses a liquefied natural gas sampler, and particularly relates to the technical field of natural gas sampling, which comprises a support table, a storage tank is fixedly connected to the middle of the upper end of the support table, a sampling pipe is fixedly connected to the front part of the storage tank, and a liquid outlet pipe is fixedly connected to the rear part of the storage tank. A plurality of pressure release valves are fixedly connected to the upper portion of the storage tank, adjusting mechanisms are fixedly connected to the front portion and the rear portion of the upper end of the supporting table, temperature control mechanisms are fixedly connected to the left side and the right side of the upper end of the supporting table, and a pressure gauge is fixedly connected to the front portion of the left side of the outer surface of the storage tank. According to the liquefied natural gas sampler disclosed by the utility model, the flow entering the sampler is accurately adjusted through the arranged adjusting mechanism, so that the liquefied natural gas sample obtained each time has high consistency in component and physical property, and the situation that some components are excessively or excessively collected due to flow fluctuation is avoided; the overall representativeness of the sample is improved, and a reliable basis is provided for subsequent quality detection and analysis.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas sampling technical field especially relates to a liquefied natural gas sampler. BACKGROUND

[0002] Liquefied natural gas (LNG) as a kind of clean, efficient energy, plays an increasingly important role in global energy structure. However, due to its special physical and chemical properties, such as extremely low temperature and high compressibility, the sampling work of liquefied natural gas puts forward extremely high technical requirements.

[0003] The existing liquefied natural gas sampler exposes many problems related to flow control and temperature regulation in practical application. In the sampling and discharge process, the flow is difficult to accurately control. On the one hand, most traditional samplers lack effective flow regulation mechanism. When sampling from storage tank or conveying pipeline, due to the high pressure in the tank or pipeline, the flow rate of natural gas is difficult to stabilize and control, resulting in inaccurate sampling amount, and further affecting the accurate judgment of LNG quality. On the other hand, when discharging the sample, it is also difficult to flexibly adjust the flow. If a large amount of sample needs to be discharged quickly for some emergency detection or experiment, it is difficult to achieve quickly; for the case of slowly and stably discharging a small amount of sample, the existing sampler is also difficult to meet, which limits its applicability in different detection demand scenarios.

[0004] LNG storage needs to be maintained at extremely low temperature to ensure its liquid form. However, in actual operation, factors such as changes in external environment temperature and introduction of heat during sampling process may cause fluctuations in LNG temperature in the storage tank. Traditional samplers rarely have effective heating or refrigeration structure for the storage tank. When the ambient temperature is low, the LNG temperature may be further reduced, and even some components may freeze, affecting the smooth progress of sampling and the representativeness of the sample; when the ambient temperature is high, LNG is easy to gasify, causing the pressure in the tank to rise, not only increasing the safety risk, but also possibly causing the loss of light components in the sample, changing the original component ratio of the sample, and seriously affecting the accuracy of the detection result, so a liquefied natural gas sampler is needed. SUMMARY

[0005] The main purpose of the utility model is to provide a liquefied natural gas sampler, which can effectively solve the problem of unable to adjust the flow.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a liquefied natural gas sampler, including the support stage, the middle part of upper end is fixedly connected with the storage jar in support stage, the front is fixedly connected with the sampling pipe in storage jar, the rear is fixedly connected with the liquid outlet pipe in storage jar, a plurality of pressure relief valves are fixedly connected with the upper part of storage jar, the front and rear of support stage upper end are fixedly connected with the adjusting mechanism, the left side and the right side of support stage upper end middle part are fixedly connected with temperature control mechanism, the left side front of storage jar outer surface is fixedly connected with pressure gauge.

[0008] Preferably, the adjusting mechanism comprises a fixed box and a circular ring, the fixed box is fixedly connected to the front side of the outer surface of the sampling pipe, the circular ring is fixedly connected to the rear side of the inner cavity of the sampling pipe, the left wall of the inner cavity of the fixed box is rotatably connected with a worm gear, the outer surface of the worm gear is meshingly connected with a worm, the right side of the middle part of the worm gear is fixedly connected with a rotating rod, the middle part of the outer surface of the rotating rod is fixedly connected with a fixed block, the rear end of the fixed block is rotatably connected with a pull rod, and the inner surface of the circular ring is slidably connected with a perforated cylinder.

[0009] Preferably, the right end of the rotating rod is rotatably connected to the right side of the inner arc of the sampling pipe, and the end of the pull rod away from the fixed block on the same side is rotatably connected to the middle part of the front end of the perforated cylinder.

[0010] Preferably, the temperature control mechanism comprises two accommodating cavities and a heating box, the two accommodating cavities are respectively formed in the left side and the right side of the inner side wall of the storage jar, the inner cavity of the accommodating cavity on the left side is fixedly connected with a heating pipe, and the heating box is fixedly connected to the left side of the middle part of the upper end of the support table.

[0011] Preferably, the output end and the input end of the heating box are respectively fixedly connected with the input end and the output end of the heating pipe penetrating through the left side of the outer surface of the storage jar.

[0012] Preferably, the inner cavity of the accommodating cavity on the right side is fixedly connected with a circulating pipe, the right side of the middle part of the upper end of the support table is fixedly connected with a water tank, the front end of the water tank is fixedly connected with a heat dissipation cold row, and the rear side of the right part of the upper end of the support table is fixedly connected with a water pump.

[0013] Preferably, the input end and the output end of the heat dissipation cold row are respectively fixedly connected with the output end of the circulating pipe and the input end of the water tank, and the input end and the output end of the water pump are respectively fixedly connected with the output end of the water tank and the input end of the circulating pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、The utility model discloses in the use process, the flow that enters the sampler is accurately adjusted through the adjusting mechanism, can guarantee that the liquefied natural gas sample of each acquisition has high consistency in composition and physical property, avoids the certain composition from being excessively or too little to be collected due to flow fluctuation, thereby improves the representativeness of sample to the whole, provides reliable basis for subsequent quality detection and analysis.

[0016] 2、 The utility model discloses in the using process, through the temperature control mechanism that sets up can maintain the temperature in the storage tank in the proper range under the low temperature environment, prevents heavy hydrocarbon etc. Component solidification, when environmental temperature is higher, can effectively control the storage tank temperature, reduces the occurrence of gasification phenomenon, avoids the loss of light component due to gasification, thereby guaranteeing the integrality and accuracy of sample component. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the adjusting mechanism section structure schematic diagram of the utility model;

[0019] Figure 3 It is the temperature control mechanism section structure schematic diagram of the utility model;

[0020] Figure 4 It is the temperature control mechanism section structure schematic diagram of the utility model;

[0021] Figure 5 It is another view schematic diagram of the whole structure of the utility model.

[0022] In the drawing: 1, support platform;2, storage tank;3, sampling pipe;4, liquid outlet pipe;5, adjusting mechanism;51, fixed box;52, circular ring;53, rotating rod;54, worm wheel;55, worm;56, fixed block;57, pull rod;58, perforated barrel;6, temperature control mechanism;61, containing cavity;62, heating box;63, heating pipe;64, circulating pipe;65, water tank;66, radiating cold row;67, water pump;7, pressure relief valve;8, pressure gauge. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0024] Embodiment one, as shown in Figure 1 And Figure 5 A kind of liquefied natural gas sampler, including support platform 1, the support platform 1 upper end middle part is fixedly connected with storage tank 2, the storage tank 2 front is fixedly connected with sampling pipe 3, the storage tank 2 rear is fixedly connected with liquid outlet pipe 4, the storage tank 2 upper part is fixedly connected with several pressure relief valves 7, the support platform 1 upper end front and rear are all fixedly connected with adjusting mechanism 5, the support platform 1 upper end middle part left side and right side are all fixedly connected with temperature control mechanism 6, the storage tank 2 outer surface left side front is fixedly connected with pressure gauge 8.

[0025] In the embodiment, first, the whole device is moved to the sampling position, then the delivery pipe is installed at the front end of the sampling pipe 3, then the sampling head of the other end of the delivery pipe is installed on the surface of the container storing liquefied natural gas, then the structure inside the adjusting mechanism 5 on the front side is rotated according to the amount taken, the flow of liquefied natural gas into the storage tank 2 is adjusted by rotating the adjusting mechanism 5 inside the structure to drive the adjusting mechanism 5 inside the structure to operate, ensuring that the liquefied natural gas sample obtained each time has high consistency in composition and physical properties, when the liquefied natural gas in the storage tank 2 is sampled during storage, the pressure inside the storage tank 2 can be observed at any time through the pressure gauge 8, and then the pressure inside the storage tank 2 can be maintained at an appropriate level at any time through the pressure relief valve 7, then the temperature inside the storage tank 2 can be maintained within an appropriate range through the structure inside the temperature control mechanism 6 according to the outside temperature, thereby ensuring the integrity and accuracy of the sample composition, and when the sampling is completed and the liquefied natural gas needs to be taken out for inspection, the flow of liquefied natural gas can be adjusted through the adjusting mechanism 5 on the back side, thereby improving the stability and accuracy of the sampling.

[0026] In order to achieve the purpose of adjusting the flow during sampling in the adjusting area, reference is made to Figure 2 In the embodiment, the adjusting mechanism 5 includes a fixed box 51 and a circular ring 52, the fixed box 51 is fixedly connected to the front side of the outer surface of the sampling pipe 3, the circular ring 52 is fixedly connected to the rear side of the inner cavity of the sampling pipe 3, the left wall of the inner cavity of the fixed box 51 is rotatably connected with a worm gear 54, the outer surface of the worm gear 54 is meshingly connected with a worm shaft 55, the middle right side of the worm gear 54 is fixedly connected with a rotating rod 53, the outer surface of the rotating rod 53 is fixedly connected with a fixed block 56 in the middle, the rear end of the fixed block 56 is rotatably connected with a pull rod 57, and the inner surface of the circular ring 52 is slidably connected with a multi-hole cylinder 58.

[0027] Further, the right end of the rotating rod 53 is rotatably connected to the right side of the inner arc surface of the sampling pipe 3, and the end of the pull rod 57 away from the same side fixed block 56 is rotatably connected to the middle of the front end of the multi-hole cylinder 58.

[0028] First, the delivery pipe is connected to the front end of the sampling pipe 3, then the rotating disc at the upper end of the fixed box 51 is rotated to drive the worm shaft 55 to rotate, then the meshing worm gear 54 is driven to rotate by the rotation of the worm shaft 55, then the rotating rod 53 is driven to rotate by the worm gear 54, then the rotating rod 53 rotates while driving the fixed block 56 to rotate, the fixed block 56 rotates while driving the pull rod 57 to rotate around the axis of the rotating rod 53, then the pull rod 57 pulls the multi-hole cylinder 58 to move forward in the inner cavity of the circular ring 52, the holes on the surface of the multi-hole cylinder 58 are leaked in front of the circular ring 52, then the more holes on the surface of the multi-hole cylinder 58 are leaked, the greater the flow is, thereby achieving the purpose of adjusting the flow.

[0029] Specifically, in order to achieve the purpose of adjusting the temperature inside the storage tank 2, with reference to Figure 3 and Figure 4 In the present scheme, the temperature control mechanism 6 comprises two accommodating cavities 61 and a heating box 62, two said accommodating cavities 61 are respectively arranged on the left side and the right side of the inner side wall of the storage tank 2, the accommodating cavity 61 located on the left side is fixedly connected with a heating pipe 63 in the inner cavity, and the heating box 62 is fixedly connected to the left side of the middle part of the upper end of the support table 1.

[0030] Further, the output end and the input end of the heating box 62 are respectively fixedly connected with the input end and the output end of the heating pipe 63 through the left side of the outer surface of the storage tank 2.

[0031] In the above, when the outside is in a low temperature environment, in order to prevent some components in the liquefied natural gas from freezing, the heating pipe 63 is started to heat the resistance wire inside the heating pipe 63, and then the heating pipe 63 generates heat, and the heat is transmitted to the inside of the storage tank 2 through the inner wall of the storage tank 2, so that the temperature inside the storage tank 2 is maintained in a suitable range, and the heavy hydrocarbon and other components are prevented from freezing, so that the sample can accurately reflect the characteristics of the original liquefied natural gas, and provide reliable samples for subsequent component analysis and other work.

[0032] The specific installation mode of the heating box 62 and the connection mode and control method of the circuit used in the above are all conventional designs, and the present application will not be described in detail.

[0033] Further, the inner cavity of the accommodating cavity 61 located on the right side is fixedly connected with a circulating pipe 64, the upper end of the right side of the support table 1 is fixedly connected with a water tank 65, the front end of the water tank 65 is fixedly connected with a heat dissipation cold row 66, and the right rear side of the upper end of the support table 1 is fixedly connected with a water pump 67.

[0034] Further, the input end and the output end of the heat dissipation cold row 66 are respectively fixedly connected with the output end of the circulating pipe 64 and the input end of the water tank 65, and the input end and the output end of the water pump 67 are respectively fixedly connected with the output end of the water tank 65 and the input end of the circulating pipe 64.

[0035] When the ambient temperature is high, the liquefied natural gas is easy to be gasified, first, the water tank 65 needs to be filled with cooling liquid, then the water pump 67 and the heat dissipation cooling row 66 are started at the same time, the water pump 67 draws the cooling liquid in the water tank 65 into the circulating pipe 64, and the other end of the circulating pipe 64 communicates with the heat dissipation cooling row 66, so that the water tank 65 can send the cooling liquid to the water pump 67 at the same time, and the heat dissipation cooling row 66 can generate suction, so that the cooling liquid is sucked into the heat dissipation cooling row 66 from the other end of the circulating pipe 64, and then reenters the water tank 65, so as to achieve the purpose of circulating cooling, the circulating pipe 64 emits cold energy from the inner wall of the containing cavity 61 to the inside of the storage tank 2, which can effectively control the temperature of the storage tank 2, reduce the gasification phenomenon, avoid the loss of light components caused by gasification, and ensure the integrity and accuracy of the sample composition.

[0036] It should be particularly pointed out that the specific installation mode of the water pump 67, the connection mode of the circuit and the control method in the utility model all belong to conventional design, and the utility model will not be described in detail.

[0037] The basic principles and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A liquefied natural gas sampler comprising a support table (1), characterized in that: The upper end of the support table (1) is fixedly connected with a storage tank (2), the front of the storage tank (2) is fixedly connected with a sampling pipe (3), the rear of the storage tank (2) is fixedly connected with a liquid outlet pipe (4), the upper part of the storage tank (2) is fixedly connected with a plurality of pressure relief valves (7), the upper end of the support table (1) is fixedly connected with an adjusting mechanism (5) at the front and the rear, and the upper end of the support table (1) is fixedly connected with a temperature control mechanism (6) at the left and the right of the middle part.

2. A liquefied natural gas sampler according to claim 1, wherein: The adjusting mechanism (5) comprises a fixed box (51) and a circular ring (52), the fixed box (51) is fixedly connected to the front side of the outer surface of the sampling pipe (3), the circular ring (52) is fixedly connected to the rear side of the inner cavity of the sampling pipe (3), the left wall of the inner cavity of the fixed box (51) is rotatably connected with a worm gear (54), the outer surface of the worm gear (54) is meshedly connected with a worm shaft (55), the middle right side of the worm gear (54) is fixedly connected with a rotating rod (53), the outer surface of the rotating rod (53) is fixedly connected with a fixed block (56) in the middle part, and the rear end of the fixed block (56) is rotatably connected with a pull rod (57); the inner surface of the circular ring (52) is slidably connected with a perforated cylinder (58).

3. A liquefied natural gas sampler as claimed in claim 2, wherein: The right end of the rotating rod (53) is rotatably connected to the right side of the inner arc of the sampling pipe (3), and one end of the pull rod (57) away from the same side fixed block (56) is rotatably connected to the middle part of the front end of the perforated cylinder (58).

4. A liquefied natural gas sampler as defined in claim 1, wherein: The temperature control mechanism (6) comprises two accommodating cavities (61) and a heating box (62), the two accommodating cavities (61) are respectively formed in the left side and the right side of the inner side wall of the storage tank (2), a heating pipe (63) is fixedly connected in the inner cavity of the accommodating cavity (61) on the left side, and the heating box (62) is fixedly connected to the left side of the upper end of the support table (1).

5. A liquefied natural gas sampler as claimed in claim 4, wherein: The output end and the input end of the heating box (62) are fixedly connected with the input end and the output end of the heating pipe (63) penetrating through the left side of the outer surface of the storage tank (2), respectively.

6. A liquefied natural gas sampler as claimed in claim 4, wherein: A circulating pipe (64) is fixedly connected in the inner cavity of the accommodating cavity (61) on the right side, a water tank (65) is fixedly connected to the right side of the upper end of the support table (1), a heat dissipation cold row (66) is fixedly connected to the front end of the water tank (65), and a water pump (67) is fixedly connected to the rear right side of the upper end of the support table (1).

7. A liquefied natural gas sampler as claimed in claim 6, characterised in that: The input end and the output end of the heat dissipation cold row (66) are fixedly connected with the output end of the circulating pipe (64) and the input end of the water tank (65), respectively, and the input end and the output end of the water pump (67) are fixedly connected with the output end of the water tank (65) and the input end of the circulating pipe (64), respectively.

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