Improved heat insulation type ultralow temperature sampling vaporizer

Abstract

The utility model relates to the technical field of sampling equipment, and discloses an improved heat insulation type ultralow temperature sampling vaporizer, which adopts a case type structure with a left layer and a right layer, and comprises a heat insulation box on the left layer and a sample vaporization box on the right layer, the redundant structure comprises a first filter element, a second filter element and a third filter element, a water tank is connected to the rear of the sample vaporization box, a first box door is hinged to the sample vaporization box through a hinge, a first door handle is connected to the first box door, a second box door is hinged to the heat insulation box through a hinge, and a second door handle is connected to the second box door. And the second box door is connected with a second door handle. And by arranging a redundant structure, the filter element is convenient to replace, and maintenance is convenient. And through the arrangement of a first door handle and a second door handle, the interior of the sample vaporization box and the interior of the heat insulation box are convenient to maintain and repair. By arranging the water tank, an internal pipeline is flushed, and residues of a sampled sample are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to an improved heat-insulated ultra-low temperature sampling vaporizer. Background Art

[0002] The analysis results of liquefied natural gas (LNG) components are key parameters for calculating LNG density and unit calorific value. The accuracy of the analysis results directly affects the specific quantity and quality judgment of LNG delivery measurement. Since LNG is an ultra-low temperature liquid mixture and is extremely easy to vaporize, any temperature and pressure changes can easily lead to rapid fractionation and vaporization of LNG components. It is very difficult to obtain a flowing LNG sample that can truly represent the liquid mixture ratio in the pipeline (i.e., a sample with a liquid mixed component ratio consistent with a gas component ratio). Therefore, the LNG sample must be kept in a supercooled state before vaporization, i.e., a fully liquid state, and no fractionation and vaporization of any component must occur.

[0003] After searching, a Chinese patent with announcement number CN206430955U discloses an insulated ultra-low temperature sampling vaporizer, which adopts a chassis-type structure with two layers, including an insulated heat preservation box in the lower layer and a sample vaporization box in the upper layer; a liquid sampling pipeline is provided in the insulated heat preservation box, and a low-temperature valve is installed on the liquid sampling pipeline, one end of the liquid sampling pipeline is connected to the plug-in sampling probe on the front outer wall of the insulated heat preservation box, and the other end extends into the sample vaporization box; the liquid sampling pipeline extending into the sample vaporization box is connected to the electric heating vaporization pressure reducing valve, the filter element and the liquefied voltage-stabilizing tube in sequence, and then connected to the sample outlet of the sample vaporization box, and the power switch of the electric heating vaporization pressure reducing valve is installed on an outer wall of the sample vaporization box.

[0004] However, in the prior art, impurities will be generated inside the filter element of the sampling equipment after a period of use, and it needs to be replaced in time. It is very inconvenient not to design redundant replacement. Therefore, in response to the above problems, we provide an improved insulated ultra-low temperature sampling vaporizer to solve the problems raised in the background technology. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the utility model provides an improved heat-insulated ultra-low temperature sampling vaporizer.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an improved insulated ultra-low temperature sampling vaporizer, adopting a left and right two-layer chassis structure, including an insulated heat preservation box on the left layer and a sample vaporization box on the right layer; a liquid sampling pipeline is provided in the insulated heat preservation box, a low temperature valve is installed on the liquid sampling pipeline, a plug-in sampling probe is connected to the liquid sampling pipeline, one end of the liquid sampling pipeline is connected to the plug-in sampling probe, and the other end of the liquid sampling pipeline is connected to the sample vaporization box; the liquid sampling pipeline in the sample vaporization box is connected to an electric heating vaporization pressure reducing valve and a redundant structure in sequence, the redundant structure includes a first filter core, a second filter core and a third filter core, the first filter core is connected to a liquefied voltage-stabilizing tube, and the sample vaporization box is connected to a sample outlet. The redundant structure is set to make the replacement of the filter core more convenient, avoid the long-term use of the filter core, resulting in the appearance of impurities, and the redundant filter core is designed for easy maintenance. The direct-insertion sampling probe and liquid sampling pipeline are set up, and the material is 1 / 8 stainless steel sampling tube, which increases the heat resistance of the sampling sample.

[0009] Preferably, a valve handle is connected to the cryogenic valve, the first filter element, the second filter element and the third filter element are respectively connected by pipelines, and the sample outlet passes through the sample vaporization box and is connected to the pipeline connection of the liquefied pressure-stabilizing tube.

[0010] Preferably, a power switch is installed above the sample vaporization box, and a protective tube is provided on the outer jacket of the plug-in sampling probe.

[0011] Preferably, the heat-insulating box is provided with a flange, and a direct-insertion sampling probe is inserted into the flange.

[0012] Preferably, a water tank is connected to the rear of the sample vaporizer box, and a first box door is hinged on the sample vaporizer box through a hinge, and a first door handle is connected to the first box door. The first door handle is provided so that the first box door can be opened or closed, making it convenient to maintain and inspect the interior of the sample vaporizer box. The water tank is provided, and a high-pressure submersible pump is installed inside, so that the internal pipeline of the sampling vaporizer can be flushed to avoid residual sample.

[0013] Preferably, the thermal insulation box is hinged with a second door, and the second door is connected with a second door handle. The second door handle can be opened or closed to facilitate maintenance and repair of the interior of the thermal insulation box.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides an improved heat-insulated ultra-low temperature sampling vaporizer, which has the following beneficial effects:

[0016] 1. This improved insulated ultra-low temperature sampling vaporizer makes the replacement of the filter element more convenient by setting up a redundant structure, avoiding the long-term use of the filter element, resulting in impurities, and the redundant filter element is designed for easy maintenance. The straight-insert sampling probe and liquid sampling pipeline are set up, and the material is 1 / 8 stainless steel sampling tube, which increases the heat resistance of the sample.

[0017] 2. The improved insulated ultra-low temperature sampling vaporizer is convenient for maintenance and repair of the interior of the sample vaporizer box through the first door handle. The second door handle is convenient for maintenance and repair of the interior of the thermal insulation box. The internal pipeline of the sampling vaporizer is flushed through the water tank to avoid residual sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is the front view of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a back view of the utility model;

[0022] Figure 4 For this utility model Figure 2 Enlarged view of point A in the middle.

[0023] In the figure: 1. Insulated heat preservation box; 2. Sample vaporization box; 3. Liquid sampling pipeline; 4. Low temperature valve; 5. Valve handle; 6. Direct plug-in sampling probe; 7. Electric heating vaporization pressure reducing valve; 8. Redundant structure; 801. First filter element; 802. Second filter element; 803. Third filter element; 9. Liquefaction voltage regulator tube; 10. Sample outlet; 11. Power switch; 12. Protection tube; 13. Flange; 14. Water tank; 15. First box door; 16. First door handle; 17. Second box door; 18. Second door handle. 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 of the embodiments.

[0025] Example 1

[0026] like Figure 1-4 As shown, the utility model provides an improved insulated ultra-low temperature sampling vaporizer, which adopts a left and right two-layer chassis structure, including an insulated heat preservation box 1 on the left layer and a sample vaporization box 2 on the right layer; a liquid sampling pipeline 3 is provided in the insulated heat preservation box 1, a low temperature valve 4 is installed on the liquid sampling pipeline 3, a plug-in sampling probe 6 is connected to the liquid sampling pipeline 3, one end of the liquid sampling pipeline 3 is connected to the plug-in sampling probe 6, and the other end of the liquid sampling pipeline 3 is connected to the sample vaporization box 2; the liquid sampling pipeline 3 in the sample vaporization box 2 is connected to the electric heating vaporization pressure reducing valve 7 and the redundant structure 8 in sequence, the redundant structure 8 includes a first filter core 801, a second filter core 802 and a third filter core 803, a liquefied voltage-stabilizing tube 9 is connected to the first filter core 801, and a sample outlet 10 is connected to the sample vaporization box 2. The redundant structure 8 is set to make the replacement of the filter core more convenient, avoid the long-term use of the filter core, resulting in impurities, and the redundant filter core is designed for easy maintenance. By providing the straight-insertion sampling probe 6 and the liquid sampling pipeline 3, both of which are made of 1 / 8 stainless steel sampling tubes, the heat resistance of the sampled sample is increased.

[0027] A valve handle 5 is connected to the cryogenic valve 4 , the first filter element 801 , the second filter element 802 and the third filter element 803 are connected via pipelines respectively, and the sample outlet 10 passes through the sample vaporizing box 2 and is connected to the pipeline connection of the liquefied pressure-stabilizing tube 9 .

[0028] In this embodiment, the redundant structure 8 is provided to make the replacement of the filter element more convenient, thereby avoiding the long-term use of the filter element, which may lead to the presence of impurities. The redundant filter element is designed to facilitate maintenance.

[0029] Example 2

[0030] like Figure 1-4 As shown, based on Example 1, the utility model provides a technical solution: preferably, a power switch 11 is installed above the sample vaporization box 2, and a protective tube 12 is provided on the outer sleeve of the plug-in sampling probe 6.

[0031] A flange 13 is provided on the heat-insulating box 1 , and a direct-insertion sampling probe 6 is inserted into the flange 13 .

[0032] A water tank 14 is connected to the rear of the sample vaporization box 2, and a first box door 15 is hingedly connected to the sample vaporization box 2 through a hinge, and a first door handle 16 is connected to the first box door 15. The first door handle 16 is provided so that the first box door 15 can be opened or closed, making it convenient to maintain and inspect the interior of the sample vaporization box 2. The water tank 14 is provided, and a high-pressure submersible pump is installed inside, so that the internal pipeline of the sampling vaporizer can be flushed to avoid residual sample.

[0033] The heat insulation box 1 is hinged with a second door 17, and the second door 17 is connected with a second door handle 18. The second door handle 18 is provided so that the second door 17 can be opened or closed, making it convenient to maintain and overhaul the interior of the heat insulation box 1.

[0034] In this embodiment, the first door handle 16 is provided to facilitate maintenance and repair of the interior of the sample vaporization box 2. The second door handle 18 is provided to facilitate maintenance and repair of the interior of the heat insulation box 1.

[0035] The working principle of this improved thermal insulation ultra-low temperature sampling vaporizer is described in detail below.

[0036] like Figure 1-4 As shown, when in use, the liquefied natural gas is sampled through the direct insertion sampling probe 6, and the low-temperature valve 4 is opened by turning the valve handle 5, and the liquid sample enters the interior of the heat-insulating box 1. The flow of the liquid sample is controlled by the low-temperature valve 4. Before reaching the inlet of the electric heating vaporization pressure reducing valve 7, the liquid sample still maintains the temperature and pressure in the original pipeline; the liquid sample is transmitted through the liquid inlet pipeline 3, so that the liquid sample enters the electric heating vaporization pressure reducing valve 7, and is fully vaporized by high temperature, and the pressure is reduced to the required range for output; then, the gaseous sample passes through the first filter element 801, and then enters the liquefied voltage-stabilizing tube 9. The sample that is further vaporized in the liquefied voltage-stabilizing tube 9 is provided to the instrument through the sample outlet 10 for component analysis.

Claims

1. An improved heat-insulated ultra-low temperature sampling vaporizer, characterized in that: A left and right two-layer chassis structure is adopted, comprising a left-layer heat insulation box (1) and a right-layer sample vaporization box (2); a liquid sampling pipeline (3) is provided in the heat insulation box (1), a low-temperature valve (4) is installed on the liquid sampling pipeline (3), a direct plug-in sampling probe (6) is connected to the liquid sampling pipeline (3), one end of the liquid sampling pipeline (3) is connected to the direct plug-in sampling probe (6), and the other end of the liquid sampling pipeline (3) is connected to the sample vaporization box (2); the liquid sampling pipeline (3) in the sample vaporization box (2) is connected to an electric heating vaporization pressure reducing valve (7) and a redundant structure (8) in sequence, and the redundant structure (8) comprises a first filter core (801), a second filter core (802) and a third filter core (803), the first filter core (801) is connected to a liquefied voltage-stabilizing tube (9), and the sample vaporization box (2) is connected to a sample outlet (10).

2. The improved heat-insulated ultra-low temperature sampling vaporizer according to claim 1, characterized in that: The low-temperature valve (4) is connected to a valve handle (5), the first filter core (801), the second filter core (802) and the third filter core (803) are respectively connected by pipelines, and the sample outlet (10) passes through the sample vaporization box (2) and is connected to the pipeline connection of the liquefied pressure-stabilizing tube (9).

3. The improved heat-insulated ultra-low temperature sampling vaporizer according to claim 1 is characterized in that: A power switch (11) is installed above the sample vaporization box (2), and a protective tube (12) is provided on the outer jacket of the direct-insertion sampling probe (6).

4. The improved heat-insulated ultra-low temperature sampling vaporizer according to claim 1 is characterized in that: The heat-insulating box (1) is provided with a flange (13), and a direct-insertion sampling probe (6) is inserted into the flange (13).

5. The improved heat-insulated ultra-low temperature sampling vaporizer according to claim 1 is characterized in that: The rear of the sample vaporization box (2) is connected to a water tank (14), and a first box door (15) is hingedly connected to the sample vaporization box (2) via a hinge, and a first door handle (16) is connected to the first box door (15).

6. The improved thermal insulation ultra-low temperature sampling vaporizer according to claim 1 is characterized in that: The heat-insulating box (1) is hingedly connected to a second box door (17) via a hinge, and the second box door (17) is connected to a second door handle (18).

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