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 the sampling barrel is fixedly connected with a sampling tube head, a control valve is fixedly mounted in the middle of the sampling tube head, and a double-sealing component is arranged in the sampling barrel; a limiting assembly is arranged at one end of the sampling barrel; according to the technical scheme provided by the utility model, the dual-sealing assembly is arranged, specifically, when the piston is abraded, the fixed cover and the waist-shaped push-pull rod are still kept in a sealing state under the action of the sealing spring sleeve, so that the whole sealing state of the sampling device can be ensured, natural gas is prevented from leaking, and the safety of the sampling device is ensured. The use safety of the sampling device is improved.

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 Technique

[0002] Liquefied natural gas is a clean and efficient energy source, mainly composed of methane. It is colorless, odorless, non-toxic, small in volume and light in mass, 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 to guarantee the quality and safety of liquefied natural gas.

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

[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 problems in the prior art that some small portable sampling devices have a simple structure. After sampling, the piston is in the pushed-out state, and the piston may be accidentally pushed during transportation. At the same time, in the sealing method using the piston, when the piston ages, the sealing effect will decrease, resulting in natural gas leakage and unsafe use. Therefore, there are inconveniences during use.

[0005] In view of this, the utility model provides a portable liquefied natural gas sampling device, including a sampling cylinder. One end of the sampling cylinder is fixedly connected with a sampling pipe head, a control valve is fixedly installed in the middle of the sampling pipe head, and a double-sealing component is arranged inside the sampling cylinder; a limiting component is arranged at one end of the sampling cylinder;

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

[0007] Optionally, the fixed cover and the sampling cylinder 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, the other end of the sealing spring sleeve is fixedly connected to one end of the piston, the sealing spring sleeve is sleeved on the outer side of one end of the waist-shaped push rod, and the sealing spring sleeve is made of rubber.

[0010] Optionally, the limiting component includes a limiting card slot, a rotating seat, a knob and a special-shaped movable hole. The limiting card slot is opened on both sides of the waist-shaped push 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, the rotating seat and the knob are connected by damping.

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

[0013] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0014] 1. For a portable liquefied natural gas sampling device of the present invention, by setting a double sealing component, specifically, when the piston is worn, at this time, under the action of the sealing spring sleeve, the sealing state between the fixed cover and the waist-shaped push rod is still maintained, so as to ensure the overall sealing state of the sampling device, prevent natural gas leakage, and improve the use safety of the sampling device.

[0015] 2. For a portable liquefied natural gas sampling device of the present invention, by setting a limiting component, specifically, after sampling liquefied natural gas, at this time, rotate the knob so that the position with a smaller diameter of the special-shaped movable hole is stuck into the limiting card slot, thereby limiting the waist-shaped push rod and preventing the waist-shaped push rod from moving, so as to avoid the situation of accidental pushing of the piston during transportation.

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

[0017] The following further describes the present invention with reference to the drawings:

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a partial side sectional view of the present invention;

[0020] Figure 3 is a partial side sectional view of the double sealing component of the present invention;

[0021] Figure 4 is a schematic structural diagram of the knob of the present invention.

[0022] Description of reference numerals: 1, sampling cylinder; 2, sampling tube head; 3, control valve; 401, fixed cover; 402, waist-shaped push rod; 403, piston; 404, sealed spring sleeve; 501, limit card slot; 502, rotating seat; 503, knob; 504, special-shaped movable hole. Detailed implementation manners

[0023] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0024] The following specifically describes a portable liquefied natural gas sampling device according to an embodiment of the present utility model with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] For ease of understanding, please refer to Figures 1 to 4 , an embodiment of a portable liquefied natural gas sampling device provided by the present utility model, including a sampling cylinder 1, a sampling tube head 2 fixedly connected to one end of the sampling cylinder 1, a control valve 3 fixedly installed in the middle of the sampling tube head 2, and a double-sealing assembly arranged inside the sampling cylinder 1; a limiting assembly is arranged at one end of the sampling cylinder 1;

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

[0028] It should be noted that by arranging the sealed spring sleeve 404 between the piston 403 and the fixed cover 401, when the piston 403 is worn, at this time, under the action of the sealed spring sleeve 404, the sealed state between the fixed cover 401 and the waist-shaped push rod 402 is still maintained, so as to ensure the overall sealed state of the sampling device, prevent natural gas from leaking, and improve the use safety of the sampling device. The sampling cylinder 1 can be made of a transparent material, such as tempered glass, so that it can be better observed whether the piston 403 in the sampling cylinder 1 has a deteriorated sealing performance.

[0029] Example 2

[0030] In some embodiments, such as Figure 3 , Figure 4 As shown, the limiting component includes a limiting card slot 501, a rotating seat 502, a knob 503, and a special-shaped movable hole 504. The limiting card slot 501 is opened on both sides of the waist-shaped push 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. The special-shaped movable hole 504 is sleeved on the outside of the waist-shaped push rod 402.

[0031] It should be noted that by opening the limiting card slot 501 on the waist-shaped end surface of the waist-shaped push rod 402, and by setting the knob 503 and opening the special-shaped movable hole 504, the special-shaped movable hole 504 is a hole formed 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, rotate the knob 503 so that the position with a smaller diameter of the special-shaped movable hole 504 is stuck into the inside of the limiting card slot 501, thereby limiting the waist-shaped push rod 402 and preventing the waist-shaped push rod 402 from moving, so as to avoid the situation of the piston 403 being mis-pushed during transportation.

[0032] Working principle: When in use, connect the sampling pipeline through the sampling pipe head 2, and open the control valve 3 for sampling. After sampling is completed, close the control valve 3. And after sampling the liquefied natural gas, at this time, rotate the knob 503 so that the position with a smaller diameter of the special-shaped movable hole 504 is stuck into the inside of the limiting card slot 501, thereby limiting the waist-shaped push rod 402 and preventing the waist-shaped push rod 402 from moving, so as to avoid the situation of the piston 403 being mis-pushed during transportation. After long-term use, when the piston 403 is aged and worn, at this time, under the action of the sealing spring sleeve 404, the fixed cover 401 and the waist-shaped push rod 402 still maintain a sealed state, so as to ensure the overall sealed state of the sampling device, prevent natural gas from leaking, and improve the use safety of the sampling device.

[0033] The above is described. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various 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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