A portable liquefied natural gas sampling device

Abstract

The utility model discloses a portable liquefied natural gas sampling device, which relates to the technical field of liquefied natural gas and comprises a sampling barrel, one end of which is fixedly connected with a sampling tube head, a control valve is fixedly installed in the middle of the sampling tube head, and a double sealing component is arranged inside the sampling barrel; a limit position component is arranged at one end of the sampling barrel; in the technical scheme provided by the utility model, by arranging the double sealing component, specifically, when the piston is worn, under the action of the sealing spring sleeve, the fixed cover and the waist-shaped push-pull rod are still kept in a sealed state, thereby ensuring the entire sealing state of the sampling device, preventing natural gas leakage, and improving the use safety of the sampling device.

Description

Technical Field

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

[0002] Liquefied natural gas is a clean and efficient energy source, with methane as its main component. It is colorless, odorless, non-toxic, small in size and light in weight, and is an advanced form of energy. During production and transportation, sampling devices are required to sample liquefied natural gas. These sampling devices can ensure accurate samples are obtained to ensure the quality and safety of liquefied natural gas.

[0003] Some of the small portable sampling devices currently in use have a simple structure. After sampling, the piston is in a pushed-out state, and the piston may be pushed in by mistake during transportation. At the same time, the sealing method using the piston will reduce the sealing effect when the piston ages, resulting in natural gas leakage, which is unsafe to use. Therefore, there are inconveniences in use and improvements need to be made. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a portable liquefied natural gas sampling device to solve the problem that some small portable sampling devices in the prior art have a simple structure, and after sampling, the piston is in a pushed-out state, and the piston may be pushed out by mistake during transportation. At the same time, the sealing method is performed by the piston. When the piston is aged, the sealing effect will be reduced, resulting in natural gas leakage, which is unsafe to use, and therefore there is inconvenience in use.

[0005] In view of this, the utility model provides a portable liquefied natural gas sampling device, including a sampling cylinder, one end of which is fixedly connected to a sampling tube head, a control valve is fixedly installed in the middle of the sampling tube head, a double sealing component is arranged inside the sampling cylinder; a limit position component is arranged at one end of the sampling cylinder;

[0006] The double sealing assembly includes a fixed cover, a waist-shaped push-pull rod, a piston and a sealing spring sleeve. The fixed cover is fixedly installed at one end of the sampling tube, the waist-shaped push-pull rod is sleeved at the axis of the fixed cover, the piston is fixedly installed at one end of the waist-shaped push-pull rod, and the sealing spring sleeve is arranged between the fixed cover and the piston.

[0007] Optionally, the fixed cover and the sampling tube are connected by threads.

[0008] Optionally, the piston is slidably connected to the inner wall of the sampling cylinder.

[0009] Optionally, one end of the sealing spring sleeve is fixedly connected to the inner wall of one end of the fixed cover, and the other end of the sealing spring sleeve is fixedly connected to one end of the piston. The sealing spring sleeve is arranged on the outside of one end of the waist-shaped push-pull rod, and the sealing spring sleeve is made of rubber.

[0010] Optionally, the limit assembly includes a limit slot, a rotating seat, a knob and a special-shaped movable hole, the limit slot is opened on both sides of the waist-shaped push-pull rod, the rotating seat is fixedly connected to the outer wall of the fixed cover, one end of the knob is rotatably connected to the outer wall of one end of the rotating seat, and the special-shaped movable hole is opened in the middle of the knob.

[0011] Optionally, a damping connection is adopted between the rotating seat and the knob.

[0012] Optionally, the special-shaped movable hole is sleeved on the outside of the waist-shaped push-pull rod.

[0013] It can be seen from the above technical solutions that the embodiments of the utility model have the following advantages:

[0014] 1. The utility model provides a portable liquefied natural gas sampling device, which is provided with a double sealing component. Specifically, when the piston is worn, under the action of the sealing spring sleeve, the fixed cover and the waist-shaped push-pull rod are still sealed, thereby ensuring the entire sealing state of the sampling device, preventing natural gas leakage, and improving the safety of the sampling device.

[0015] 2. The utility model provides a portable liquefied natural gas sampling device, which is provided with a limit assembly. Specifically, after sampling the liquefied natural gas, the knob is turned so that the position with a smaller diameter of the special-shaped movable hole is inserted into the limit slot, thereby limiting the waist-shaped push-pull rod and preventing the waist-shaped push-pull rod from moving, thereby avoiding the piston from being pushed accidentally during transportation.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial sectional view of the side of the utility model;

[0020] Figure 3 It is a partial sectional view of the side of the double sealing assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the knob structure of the utility model.

[0022] Explanation of the reference numerals: 1. sampling cylinder; 2. sampling tube head; 3. control valve; 401. fixed cover; 402. waist-shaped push-pull rod; 403. piston; 404. sealing spring sleeve; 501. limit slot; 502. rotating seat; 503. knob; 504. special-shaped movable hole. DETAILED DESCRIPTION

[0023] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0024] A portable liquefied natural gas sampling device according to an embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] For easier understanding, see Figures 1 to 4 The utility model provides an embodiment of a portable liquefied natural gas sampling device, comprising a sampling tube 1, one end of the sampling tube 1 is fixedly connected to a sampling tube head 2, a control valve 3 is fixedly installed in the middle of the sampling tube head 2, and a double sealing component is arranged inside the sampling tube 1; a limit position component is arranged at one end of the sampling tube 1;

[0027] The double sealing assembly includes a fixed cover 401, a waist-shaped push-pull rod 402, a piston 403 and a sealing spring sleeve 404. The fixed cover 401 is fixedly installed at one end of the sampling tube 1, the waist-shaped push-pull rod 402 is sleeved on the axis of the fixed cover 401, the piston 403 is fixedly installed at one end of the waist-shaped push-pull rod 402, the sealing spring sleeve 404 is arranged between the fixed cover 401 and the piston 403, the fixed cover 401 and the sampling tube 1 are threadedly connected, the piston 403 is slidably connected to the inner wall of the sampling tube 1, one end of the sealing spring sleeve 404 is fixedly connected to the inner wall of one end of the fixed cover 401, and the other end of the sealing spring sleeve 404 is fixedly connected to one end of the piston 403, the sealing spring sleeve 404 is sleeved on the outside of one end of the waist-shaped push-pull rod 402, and the sealing spring sleeve 404 is made of rubber.

[0028] It should be noted that, by providing a sealing spring sleeve 404 between the piston 403 and the fixed cover 401, when the piston 403 is worn, under the action of the sealing spring sleeve 404, the fixed cover 401 and the waist-shaped push-pull rod 402 are still kept sealed, thereby ensuring the entire sealing state of the sampling device, preventing natural gas leakage, and improving the safety of the sampling device. The sampling tube 1 can be made of transparent materials, such as tempered glass, so that it is easier to observe whether the sealing of the piston 403 in the sampling tube 1 has deteriorated.

[0029] Example 2

[0030] In some embodiments, Figure 3 , Figure 4 As shown, the limit assembly includes a limit slot 501, a rotating seat 502, a knob 503 and a special-shaped movable hole 504. The limit slot 501 is opened on both sides of the waist-shaped push-pull rod 402, the rotating seat 502 is fixedly connected to the outer wall of the fixed cover 401, one end of the knob 503 is rotatably connected to the outer wall of one end of the rotating seat 502, the special-shaped movable hole 504 is opened in the middle of the knob 503, a damping connection is adopted between the rotating seat 502 and the knob 503, and the special-shaped movable hole 504 is sleeved on the outside of the waist-shaped push-pull rod 402.

[0031] It should be noted that, by opening a limit slot 501 on the waist-shaped end face of the waist-shaped push-pull rod 402, and by setting a knob 503 and opening a special-shaped movable hole 504, the special-shaped movable hole 504 is a hole opened by a circle and a waist shape, and the diameter of the circle is smaller than the length of the waist shape. Therefore, after sampling the liquefied natural gas, at this time, turn the knob 503 so that the position with a smaller diameter of the special-shaped movable hole 504 is inserted into the limit slot 501, thereby limiting the waist-shaped push-pull rod 402 to prevent the waist-shaped push-pull rod 402 from moving, thereby avoiding the piston 403 from being pushed accidentally during transportation.

[0032] Working principle: When in use, connect the sampling pipeline through the sampling tube head 2, and open the control valve 3 for sampling. After the sampling is completed, close the control valve 3. In addition, after sampling the liquefied natural gas, turn the knob 503 to make the smaller diameter position of the special-shaped movable hole 504 enter the limit slot 501, thereby limiting the waist-shaped push-pull rod 402 to prevent the waist-shaped push-pull rod 402 from moving, thereby avoiding the piston 403 from being pushed accidentally during transportation. After long-term use, when the piston 403 is aged and worn, under the action of the sealing spring sleeve 404, the fixed cover 401 and the waist-shaped push-pull rod 402 remain sealed, thereby ensuring the entire sealing state of the sampling device, preventing natural gas leakage, and improving the safety of the sampling device.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A portable liquefied natural gas sampling device, characterized in that: The invention comprises a sampling cylinder (1), one end of which is fixedly connected to a sampling tube head (2), a control valve (3) is fixedly installed in the middle of the sampling tube head (2), and a double sealing component is arranged inside the sampling cylinder (1); a limit position component is arranged at one end of the sampling cylinder (1); The double sealing component comprises a fixed cover (401), a waist-shaped push-pull rod (402), a piston (403) and a sealing spring sleeve (404); the fixed cover (401) is fixedly mounted on one end of the sampling tube (1); the waist-shaped push-pull rod (402) is sleeved on the axis of the fixed cover (401); the piston (403) is fixedly mounted on one end of the waist-shaped push-pull rod (402); and the sealing spring sleeve (404) is arranged between the fixed cover (401) and the piston (403).

2. A portable liquefied natural gas sampling device according to claim 1, characterized in that: The fixed cover (401) and the sampling tube (1) are connected by threads.

3. A portable liquefied natural gas sampling device according to claim 1, characterized in that: The piston (403) is slidably connected to the inner wall of the sampling cylinder (1).

4. A portable liquefied natural gas sampling device according to claim 1, characterized in that: One end of the sealing spring sleeve (404) is fixedly connected to the inner wall of one end of the fixed cover (401), and the other end of the sealing spring sleeve (404) is fixedly connected to one end of the piston (403). The sealing spring sleeve (404) is sleeved on the outside of one end of the waist-shaped push-pull rod (402), and the sealing spring sleeve (404) is made of rubber.

5. A portable liquefied natural gas sampling device according to claim 1, characterized in that: The limiting assembly comprises a limiting slot (501), a rotating seat (502), a knob (503) and a special-shaped movable hole (504); the limiting slot (501) is arranged on both sides of the waist-shaped push-pull rod (402); the rotating seat (502) is fixedly connected to the outer wall of the fixed cover (401); one end of the knob (503) is rotatably connected to the outer wall of one end of the rotating seat (502); and the special-shaped movable hole (504) is arranged in the middle of the knob (503).

6. A portable liquefied natural gas sampling device according to claim 5, characterized in that: The rotating seat (502) and the knob (503) are connected by a damping mechanism.

7. The portable liquefied natural gas sampling device according to claim 5, characterized in that: The special-shaped movable hole (504) is sleeved on the outside of the waist-shaped push-pull rod (402).

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