Liquefied natural gas sampler

Abstract

The utility model discloses a liquefied natural gas sampler which is characterized in that a connecting pipe is fixedly connected to the closed end of a heat preservation container, a pipe joint is arranged at the end, far away from the heat preservation container, of the connecting pipe, a valve is installed on the connecting pipe, and a piston is connected in the heat preservation container in a sliding and sealing mode; the other end of the heat preservation container is detachably connected with an end cover, a screw rod is arranged in the middle of the end cover in a matched and penetrating mode through a threaded hole, one end of the screw rod is rotationally connected with the piston, and the other end of the screw rod is detachably connected with a hand wheel. By arranging the heat preservation container composed of the barrel and the shell, heat exchange between the barrel and the outside can be effectively reduced by means of the vacuum state of the cavity, and by arranging the hollow and vacuum piston, the speed of heat exchange between liquefied natural gas and the outside through the piston can be slowed down. And therefore, a good heat preservation effect on liquefied natural gas is achieved, frostbite to operators is avoided, and the use effect is good.

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: Its main component is methane, which is recognized as the cleanest fossil energy on earth. It is colorless, odorless, non-toxic and non-corrosive. Its volume is about 1 / 625 of the volume of the same amount of gaseous natural gas, and the mass of liquefied natural gas is only about 45% of the same volume of water.

[0003] A sampler is required in the liquefied natural gas sampling process. After the traditional sampler is used, liquefied natural gas will remain inside. If the inside of the sampler cannot be cleaned in time, it will affect the next use of the sampler and reduce the working accuracy of the sampler.

[0004] After searching, the patent with announcement number CN220473122U discloses a sampler for liquefied natural gas. When the inside of the extraction shell needs to be cleaned, the round block is rotated ninety degrees, the round block drives the round rod to rotate ninety degrees, the round rod drives the card plate to rotate ninety degrees, the card plate withdraws from the inside of the card slot, the mounting column and the mounting block 2 lose fixation, the sealing cover is moved upward, the sealing cover is separated from the extraction shell, the sealing cover drives the electric push rod and the piston to withdraw from the inside of the extraction shell, the inside of the extraction shell is opened, and the inside can be cleaned and washed with tools, which has the advantage of convenient internal cleaning. After the sampler is used, the inside of the sampler is easy to be cleaned, which will not affect the next use of the sampler, thereby improving the working accuracy of the sampler.

[0005] Although the above scheme is convenient for opening the sealing cover to clean the inside of the extraction shell, the connection mechanism between the sealing cover and the extraction shell is too complicated and not easy to produce and process. In addition, the conventional storage temperature of liquefied natural gas is usually around -162°C. The extraction shell lacks an insulation structure and is prone to frostbite operators. It also causes the internal liquefied natural gas to quickly exchange heat with the outside world through the extraction shell, which needs to be improved. Utility Model Content

[0006] The purpose of the utility model is to provide a liquefied natural gas sampler to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A liquefied natural gas sampler, wherein the closed end of the heat-insulating container is fixedly connected to a connecting pipe, an end of the connecting pipe away from the heat-insulating container is provided with a pipe joint, a valve is installed on the connecting pipe, a piston is slidably and sealedly connected inside the heat-insulating container, the other end of the heat-insulating container is detachably connected to an end cover, a screw is passed through the middle of the end cover through a threaded hole, one end of the screw is rotatably connected to the piston, and the other end of the screw is detachably connected to a handwheel.

[0009] As a further solution of the utility model: the heat-insulating container includes a cylinder, the outer wall of the cylinder is fixedly connected to an outer shell, and a cavity is formed between the outer shell and the cylinder, the cavity is in a vacuum state, the connecting pipe is fixedly penetrated through the closed end of the cylinder, and the end cover is located at the open end of the cylinder.

[0010] As a further solution of the utility model: the piston is a hollow structure, and the interior of the piston is in a vacuum state, a plurality of sealing rings are nested on the outer wall of the piston, and the outer wall of the sealing ring is in contact with the inner wall of the cylinder.

[0011] As a further solution of the utility model: a reinforcement ring is fixedly sleeved on the outer wall of the shell near one end of the end cover, and a plurality of clamping blocks are fixedly connected to the outer wall of the reinforcement ring in a circumferential distribution, and connecting blocks are fixedly connected to the corresponding parts of the outer wall of the end cover and the clamping blocks, and a slot matching the clamping block is formed on the outer wall of the connecting block, and a stop block is arranged at one end of the slot.

[0012] As a further solution of the utility model: the outer wall of the end cover is provided with a hand-tightening bolt through a threaded hole, and the hand-tightening bolt is located at one side of a slot.

[0013] As a further solution of the utility model: the end of the connecting pipe is detachably connected with a protective cap, and the pipe joint is located on the inner side of the protective cap.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a heat-insulating container composed of a cylinder and an outer shell, and can utilize the vacuum state of the cavity to effectively reduce the heat exchange between the cylinder and the outside world. By providing a piston with a hollow and vacuum interior, the speed of heat exchange between the liquefied natural gas and the outside world through the piston can also be slowed down, thereby achieving a good heat-insulating effect on the liquefied natural gas, avoiding frostbite to operators, and having a good use effect.

[0016] 2. In the utility model, when the end cover needs to be installed at the end of the heat-insulating container, it is only necessary to align the slot on the connecting block with the corresponding clamping block, rotate the end cover to insert the clamping block into the slot, and then tighten the hand bolt so that the threaded end of the hand bolt is blocked on one side of the clamping block. This can achieve locking between the heat-insulating container and the end cover, and can prevent relative rotation between the heat-insulating container and the end cover due to misoperation. The utility model has high reliability and is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the structure of a liquefied natural gas sampler.

[0018] Figure 2 The figure is a schematic diagram of the distribution structure of the card blocks in a liquefied natural gas sampler.

[0019] Figure 3 The figure is a schematic diagram of the structure of a stopper in a liquefied natural gas sampler.

[0020] Among them, the cylinder 1, the outer shell 2, the cavity 3, the connecting pipe 4, the valve 5, the protective cap 6, the end cover 7, the screw 8, the hand wheel 9, the piston 10, the sealing ring 11, the reinforcement ring 12, the clamping block 13, the connecting block 14, the slot 15, the stopper 16, and the hand-tightening bolt 17. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 3 In an embodiment of the utility model, a liquefied natural gas sampler includes a heat-insulating container, a closed end of the heat-insulating container is fixedly connected to a connecting pipe 4, an end of the connecting pipe 4 away from the heat-insulating container is provided with a pipe joint, a valve 5 is installed on the connecting pipe 4, a piston 10 is slidably and sealedly connected in the heat-insulating container, the other end of the heat-insulating container is detachably connected to an end cover 7, a screw 8 is penetrated through the middle part of the end cover 7 through a threaded hole, one end of the screw 8 is rotatably connected to the piston 10, and the other end of the screw 8 is detachably connected to a hand wheel 9.

[0023] After connecting the pipe joint with the sampling joint on the natural gas storage container, open the valve 5 to inject the liquefied natural gas into the insulation container. At this time, the screw 8 is rotated by the hand wheel 9 to drive the piston 10 to move toward the end cover 7, so that the liquefied natural gas can be pumped into the insulation container to achieve the sampling of the natural gas. After closing the valve 5, the hand wheel 9 is removed from the end of the screw 8 to avoid misoperation of the screw 8. The operation is simple and convenient.

[0024] The heat-insulating container includes a cylinder 1, an outer shell 2 is fixedly connected to the outer wall of the cylinder 1, and a cavity 3 is formed between the outer shell 2 and the cylinder 1, the cavity 3 is in a vacuum state, the connecting pipe 4 is fixedly penetrated through the closed end of the cylinder 1, and the end cover 7 is located at the open end of the cylinder 1. Furthermore, the piston 10 is a hollow structure, and the interior of the piston 10 is in a vacuum state, and a plurality of sealing rings 11 are nested on the outer wall of the piston 10, and the outer wall of the sealing ring 11 fits with the inner wall of the cylinder 1.

[0025] The utility model adopts the above scheme, and provides a heat-insulating container composed of a cylinder 1 and an outer shell 2. The vacuum state of the cavity 3 can be used to effectively reduce the heat exchange between the cylinder 1 and the outside world. The piston 10 with a hollow and vacuum interior can also be provided to slow down the speed of heat exchange between the liquefied natural gas and the outside world through the piston 10, thereby achieving a good heat-insulating effect on the liquefied natural gas, avoiding frostbite to the operator, and having a good use effect.

[0026] Specific combination Figure 1-3 In one embodiment of the utility model, a reinforcement ring 12 is fixedly sleeved on the outer wall of the housing 2 near one end of the end cover 7, and a plurality of blocks 13 are fixedly connected to the outer wall of the reinforcement ring 12 in a circumferential distribution, and a connecting block 14 is fixedly connected to the corresponding parts of the outer wall of the end cover 7 and the block 13, and a slot 15 adapted to the block 13 is formed on the outer wall of the connecting block 14, and a stopper 16 is provided at one end of the slot 15.

[0027] Furthermore, a hand-tightening bolt 17 is provided through the outer wall of the end cover 7 through a threaded hole, and the hand-tightening bolt 17 is located at one side of a slot 15 .

[0028] The utility model adopts the above scheme. When it is necessary to install the end cover 7 at the end of the heat-insulating container, it is only necessary to align the slot 15 on the connecting block 14 with the corresponding block 13, rotate the end cover 7 to insert the block 13 into the slot 15, and then tighten the hand bolt 17 so that the threaded end of the hand bolt 17 blocks one side of the block 13, so that the heat-insulating container and the end cover 7 can be locked, and relative rotation between the heat-insulating container and the end cover 7 due to misoperation can be avoided. The utility model has strong reliability and simple and convenient operation. When it is necessary to clean the heat-insulating container and the piston 10, it is only necessary to remove the hand bolt 17 and rotate the end cover 7 to disengage the block 13 from the slot 15, so that the end cover 7 and the piston 10 can be removed from the heat-insulating container. The structure of the end cover 7 and the connecting block 14 is simple, and can be cast and molded, and is easy to process and produce.

[0029] Specific combination Figure 1 In one embodiment of the utility model, the end of the connecting pipe 4 is detachably connected with a protective cap 6, and the pipe joint is located on the inner side of the protective cap 6, so that the protective cap 6 can protect the pipe joint.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquefied natural gas sampler, characterized in that: The invention comprises a heat-insulating container, wherein a closed end of the heat-insulating container is fixedly connected to a connecting pipe (4), an end of the connecting pipe (4) away from the heat-insulating container is provided with a pipe joint, a valve (5) is installed on the connecting pipe (4), a piston (10) is slidably and sealedly connected in the heat-insulating container, the other end of the heat-insulating container is detachably connected to an end cover (7), a screw (8) is penetrated through the middle part of the end cover (7) through a threaded hole, one end of the screw (8) is rotatably connected to the piston (10), and the other end of the screw (8) is detachably connected to a hand wheel (9).

2. A liquefied natural gas sampler according to claim 1, characterized in that: The heat-insulating container comprises a cylinder (1), the outer wall of the cylinder (1) is fixedly connected to an outer shell (2), a cavity (3) is formed between the outer shell (2) and the cylinder (1), and the cavity (3) is in a vacuum state. The connecting pipe (4) is fixedly penetrated through the closed end of the cylinder (1), and the end cover (7) is located at the open end of the cylinder (1).

3. A liquefied natural gas sampler according to claim 2, characterized in that: The piston (10) is a hollow structure, and the interior of the piston (10) is in a vacuum state. A plurality of sealing rings (11) are nested in the outer wall of the piston (10), and the outer wall of the sealing ring (11) is in contact with the inner wall of the cylinder (1).

4. A liquefied natural gas sampler according to claim 2, characterized in that: A reinforcement ring (12) is fixedly sleeved on the outer wall of the housing (2) near one end of the end cover (7); a plurality of clamping blocks (13) are fixedly connected to the outer wall of the reinforcement ring (12) in a circumferentially distributed manner; a connection block (14) is fixedly connected at the corresponding positions of the outer wall of the end cover (7) and the clamping block (13); a slot (15) adapted to the clamping block (13) is formed on the outer wall of the connection block (14); and a stopper (16) is provided at one end of the slot (15).

5. A liquefied natural gas sampler according to claim 4, characterized in that: A hand-tightening bolt (17) is provided through the outer wall of the end cover (7) through a threaded hole, and the hand-tightening bolt (17) is located on one side of a slot (15).

6. A liquefied natural gas sampler according to claim 1, characterized in that: The end of the connecting pipe (4) is detachably connected to a protective cap (6), and the pipe joint is located inside the protective cap (6).

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