Leak-proof device of LNG filling station

Abstract

The utility model relates to the field of LNG (Liquefied Natural Gas) filling equipment, in particular to a leakage-proof device of an LNG filling station, which solves the problem of poor leakage-proof effect of the existing LNG filling station and comprises a detection element and an on-off valve which are arranged on an output pipeline of the filling station, and the detection element is in electric signal connection with the on-off valve to control operation. A leakage-proof mechanism is installed at the output end of the output pipeline and comprises an outer pipe connected to the output position in a sealed and sleeved mode, a flexible sealing sleeve connected to the end of the outer pipe and a sealing clamp arranged at the end of the flexible sealing sleeve and used for being installed on a filling pipeline for material receiving in a sealed mode, and an inert gas device is installed on the outer pipe in a communicating mode. And the detection element is in electric signal connection with the inert gas device to control opening and closing of the inert gas device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of LNG filling equipment, specifically relates to a LNG filling station anti -leakage device. BACKGROUND

[0002] LNG, namely liquefied natural gas, main component is methane, has the characteristics of colorless, odorless, non-toxic, is through the gaseous natural gas cooling to-162 DEG C under normal pressure, makes it condense into liquid, and then subpackaged civil or industrial raw materials, and LNG filling station is the key facility in liquefied natural gas (LNG) supply chain, mainly used to fill the LNG in the storage tank to tank car or on -vehicle gas cylinder, so as to transport or directly supply end user.

[0003] As shown in the patent with the announcement number CN 214500870 U, a kind of LNG bottle group anti-leakage filling connection device is presented, including stop valve and arc hoop, the right end inside of stop valve is threadedly connected with adapter pipe, and the right side of adapter pipe is sequentially provided with transfer box and inlet pipe, the upper side of transfer box is provided with box cover, and the outer end lower surface of box cover is fixedly connected with sealing gasket, and the left end lower surface of box cover is welded with filter screen, the right end inside of stop valve is threadedly connected with outlet pipe, and the lower end front side of outlet pipe is bonded with limit block, and the lower end inside of outlet pipe is threadedly connected with filling hose, the inside of limit block left and right two ends is located arc hoop, and the upper and lower sides of arc hoop are both fixedly connected with fixed plate, and the inside of fixed plate is sequentially connected with heat preservation pad and non-slip pad.

[0004] It presents a stable structure example for pipeline connection position to provide anti-leakage processing.But this structure cannot actively intervene and protect when pipeline joint leaks. SUMMARY

[0005] Therefore, the utility model provides a kind of LNG filling station anti-leakage device, solve the problem that the anti-leakage effect of existing LNG filling station is not good.

[0006] To achieve the above object, the utility model is realized by the following technical scheme:

[0007] A kind of LNG filling station anti-leakage device, including the detection element and on-off valve of installation on filling station output pipeline, the detection element is connected with the on-off valve electric signal to control operation, the output end of output pipeline is installed with leakage prevention mechanism, the leakage prevention mechanism includes the outer tube of sealing sleeve in output, the flexible sealing sleeve pipe connected in the outer tube end, the sealing clamp for being sealed with the filling pipeline of material connection and being installed at the flexible sealing sleeve pipe end, inert gas device is communicated and installed on the outer tube, the detection element is connected with the inert gas device electric signal to control its opening and closing.

[0008] Preferably, the outer tube is provided with an annularly arranged optical fiber temperature sensor array on the inner wall, which is electrically connected with the on-off valve.

[0009] Preferably, the detection element is an electronic barometer and / or a mass flow meter.

[0010] Preferably, the sealing clamp comprises a base and two clamp assemblies arranged on the base.

[0011] Preferably, the inert gas device is a gas tank and an on-off electromagnetic valve.

[0012] Preferably, the inert gas device is a gas generator and an on-off electromagnetic valve.

[0013] By adopting the foregoing technical scheme, the utility model has the advantages of:

[0014] The technical scheme adds a leak-proof mechanism at the connection position of the output pipeline and the filling pipeline of the storage tank or other material storage equipment, and when material leaks, the leak-proof mechanism cooperates with the detection element arranged on the output pipeline and actively fills inert gas through the inert gas device, so that the leak-proof mechanism can actively and timely fill inert gas at the connection position when the detection element detects an abnormal condition. The leak-proof mechanism is arranged outside the output pipeline and the filling pipeline, and can timely remedy when an abnormal condition is detected, and can be used when a false alarm is detected without affecting the filling work, thereby ensuring safety and not affecting the filling work. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic view of the overall structure of the utility model;

[0016] Figure 2 FIG. 2 is a schematic view of the structure of the sealing clamp in the utility model.

[0017] Reference signs: 1, output pipeline; 11, filling pipeline; 2, detection element; 3, on-off valve; 4, leak-proof mechanism; 41, outer tube; 42, flexible sealing sleeve; 43, sealing clamp; 431, base; 432, clamp assembly; 5, inert gas device; 51, on-off electromagnetic valve; 52, gas tank; 6, optical fiber temperature sensor. DETAILED DESCRIPTION

[0018] The embodiments of the utility model will be described in detail below with reference to specific examples, so that the technical means for solving the technical problems and achieving the technical effects of the utility model can be fully understood and implemented. EMBODIMENT

[0019] ReferenceFigure 1 and Figure 2 A leakage-proof device for LNG filling station, comprising a detection element 2 and an on-off valve 3 installed on the output pipeline 1 of the filling station, the detection element 2 and the on-off valve 3 are electrically connected to control operation, in structure, the detection element 2 is a comprehensive sensor of electronic pressure gauge and mass flow meter, which can monitor pipeline pressure and flow change in real time and identify slight leakage;

[0020] A leakage-proof mechanism 4 is installed at the output end of the output pipeline 1, which comprises an outer pipe 41 sealingly sleeved at the output, a flexible sealing sleeve 42 connected at the end of the outer pipe 41, and a sealing clamp 43 provided at the end of the flexible sealing sleeve 42 for sealing installation with the filling pipeline 11 for receiving materials, in structure, the sealing clamp 43 comprises a base 431 and two clamp assemblies 432 provided on the base 431, the two clamp assemblies 432 are arranged in a staggered manner in the radial direction of the flexible sealing sleeve 42, so as to form a continuous sealing structure in two positions, and a graphite winding gasket is arranged on the inner wall of the end of the flexible sealing sleeve 42 to compensate for the error caused by low-temperature shrinkage after locking and prevent heat stress from causing a decrease in sealing effect; at the same time, in order to further improve the stability of the sealing structure, the two clamp assemblies 432 are arranged in a staggered manner in the radial direction of the flexible sealing sleeve 42, for details, please refer to Figure 2 ;

[0021] In structure, the outer pipe 41 is provided with an inert gas device 5 connected thereto, here, the inert gas device 5 comprises an on-off electromagnetic valve 51 and a corresponding connecting pipeline, and a gas tank 52 or a gas generator is selected according to the scale of the filling station, and the gas tank 52 is selected as an example here; under this design, the detection element 2 and the inert gas device 5 (i.e. the on-off electromagnetic valve 51) are electrically connected to control the opening and closing thereof. The technical solution adopts the leakage-proof mechanism 4 added at the connection position between the output pipeline 1 of the storage tank or other material storage equipment and the filling pipeline 11, which, in cooperation with the detection element 2 provided on the output pipeline 1, actively fills inert gas through the added inert gas device 5 to achieve the purpose of actively preventing gas leakage in a timely manner at the connection position when the detection element 2 detects abnormal conditions, which is arranged outside the output pipeline 1 and the filling pipeline 11, and can not only remedy in a timely manner when detecting abnormal conditions, but also can be carried out without affecting the filling work when detecting false alarms, ensuring safety without affecting the filling work.

[0022] In the embodiment, the outer tube 41 is provided with an annularly arranged array of fiber temperature sensors 6 on the inner wall, which are electrically connected to the on-off valve 3; thus, the inner wall of the outer tube 41 is additionally provided with the second type of sensors for further detecting the state of the output pipeline 1, so as to improve the detection accuracy and realize the function of locating the leakage point; the sensors are integrated with MOS gas sensitive elements and infrared gas sensors, so as to improve the detection sensitivity of the methane concentration.

[0023] In the embodiment, the electronic barometer and the mass flow meter are used for primary detection, and then the fiber temperature sensors 6 on the inner wall of the outer tube 41 are used for secondary accurate detection, so as to greatly improve the detection precision and accuracy.

[0024] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes are within the protection scope of the utility model.

Claims

1. A leakage-proof device for LNG filling station, comprising a detection element (2) and an on-off valve (3) installed on the output pipeline (1) of the filling station, the detection element (2) and the on-off valve (3) being electrically connected, characterized in that: The output pipeline (1) is provided with a leakage prevention mechanism (4) at the output end, which comprises an outer tube (41) sealingly sleeved at the output, a flexible sealing sleeve (42) connected at the end of the outer tube (41), and a sealing clamp (43) provided at the end of the flexible sealing sleeve (42) for sealingly mounting with a filling pipeline (11) for receiving materials, and an inert gas device (5) is installed in communication with the outer tube (41), and the detection element (2) is electrically connected with the inert gas device (5) to control the opening and closing thereof.

2. A LNG filling station leak prevention device according to claim 1, characterized in that: An annularly arranged array of fiber temperature sensors (6) is installed on the inner wall of the outer tube (41), and the fiber temperature sensors (6) are electrically connected with the opening and closing valve (3).

3. The LNG filling station leak prevention apparatus of claim 1, wherein: The detection element (2) is an electronic air pressure gauge and / or a mass flow meter.

4. A LNG filling station leak prevention device according to claim 1 or 2 or 3, characterized in that: The sealing clamp (43) comprises a base (431) and two clamp assemblies (432) provided on the base (431).

5. A LNG filling station leak prevention device according to claim 1 or 2 or 3, characterized in that: The inert gas device (5) is a gas tank (52) and an opening and closing electromagnetic valve (51).

6. A leak prevention device for an LNG filling station according to claim 1 or 2 or 3, characterized in that: The inert gas device (5) is a gas generator and an opening and closing electromagnetic valve (51).

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