A large-volume LNG vehicle-mounted gas cylinder

Abstract

The utility model provides a kind of large-volume LNG vehicle-mounted gas cylinder, including LNG vehicle-mounted gas cylinder assembly and its assembly booster gasifier, further including bracket, the middle part of the bracket is detachably connected with mounting bracket and positioning frame from below to above respectively;The middle part of the mounting bracket is fixed with the air supply array formed by air supply fan, the air outlet of the air supply fan is directly opposite the bottom pipeline of booster gasifier and the bottom of LNG vehicle-mounted gas cylinder assembly, the top fan mounting point of the mounting bracket is uniformly fixed with positioning frame, the middle part of the positioning frame is equipped with heating flow channel, the heating flow channel of the positioning frame is fixed with electric heating wire, vehicle-mounted controller and driving motor cooperate to open and close air door, air supply fan and electric heating wire cooperate to provide part of heat required for liquefied natural gas gasification process for booster gasifier, air supply fan can provide air cooling treatment for booster gasifier and other components, improve the problem that gasification pressure boost heat gap is large and stability is insufficient for booster gasifier under low temperature environment.

Description

Technical Field

[0001] This utility model mainly relates to the field of LNG cylinder technology, specifically to a large-capacity LNG vehicle-mounted cylinder. Background Technology

[0002] In long-distance transportation scenarios, some vehicles need to be equipped with gas cylinders based on the reserved mounting positions on the chassis of freight vehicles or some passenger vehicles. A well-designed large-capacity single cylinder can make better use of the chassis space than multiple small cylinders. At the same time, the configuration of pipelines, valves and instrument systems of a large single cylinder is simpler than that of multiple small cylinders, which facilitates subsequent inspection and maintenance.

[0003] In the mid-mounted, backpack-borne design of LNG cylinders on freight vehicles, a pressurized vaporizer is typically installed underneath. The heat dissipated by the engine operating under the cab of the cab of the flat-nose truck causes the liquefied natural gas in the pressurized vaporizer to be converted into gaseous natural gas. The heat source for this conversion process is mainly the heat generated by the vehicle engine. In areas with higher ambient temperatures, heat can also be obtained through natural convection of the ambient air. In areas with lower ambient temperatures, this technology currently relies entirely on ambient temperature and the heat generated by the engine, and is greatly affected by changes in ambient temperature. Therefore, auxiliary heating components are required in low-temperature environments.

[0004] The inventors developed a large-capacity LNG vehicle-mounted gas cylinder and added an auxiliary heating component below the cylinder's pressurization vaporizer assembly. The required PLC control module starts and stops the blower, electric heating component, and damper based on feedback data from the cylinder's pressure sensor and the temperature sensor on the pressurization vaporizer, providing auxiliary heating for the cylinder's pressurization vaporizer. Utility Model Content

[0005] 1. Technical problem solved by the utility model:

[0006] This invention provides a large-capacity LNG vehicle-mounted gas cylinder, which solves the technical problem of poor stability in existing equipment where the booster vaporizer assembly relies on ambient temperature and engine operating heat for heating.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: a large-capacity LNG vehicle-mounted gas cylinder, including an LNG vehicle-mounted gas cylinder assembly and a booster vaporizer mounted thereon, and also a bracket, wherein a mounting frame and a positioning frame are detachably connected from bottom to top in the middle of the bracket.

[0009] The mounting frame has a blower array fixed in the middle, the blower is electrically connected to a first temperature protection switch, the blower outlet is directly opposite the bottom pipe of the booster vaporizer and the bottom of the LNG vehicle gas cylinder assembly, the top blower mounting points of the mounting frame are all fixed with positioning frames, the positioning frames have a heating channel in the middle, the heating channel of the positioning frames is fixed with an electric heating wire, and the electric heating wire is electrically connected to a second temperature protection switch;

[0010] The blower is electrically connected to an on-board controller, which is electrically connected to the electric booster valve of the booster vaporizer. The on-board controller is also electrically connected to the pressure sensor configured in the LNG vehicle cylinder assembly and to the pipeline temperature sensor of the booster vaporizer.

[0011] Furthermore, the front of the LNG vehicle-mounted gas cylinder assembly is detachably snapped with a cover, the inner rear side of which shields the front pipeline of the LNG vehicle-mounted gas cylinder assembly.

[0012] Furthermore, the LNG vehicle-mounted gas cylinder assembly is fixedly provided with split brackets on both the front and rear sides of the bottom. The front part of the split bracket located at the front of the LNG vehicle-mounted gas cylinder assembly is fixedly provided with a first protective plate that matches the bottom pipeline on the front side of the booster vaporizer. The rear part of the split bracket located at the rear of the LNG vehicle-mounted gas cylinder assembly is fixedly provided with a second protective plate that matches the bottom pipeline on the rear side of the booster vaporizer.

[0013] Furthermore, multiple heat exchange fins are fixedly installed on the outer side of the bottom pipe of the booster vaporizer.

[0014] Furthermore, airflow channels are provided on both the left and right sides of the positioning frame, and multiple dampers are movably connected at equal intervals on the inner sides of both ends of the positioning frame. Gooseneck shafts are fixed at the movable connection between the front of the dampers and the positioning frame, and the top of the front ends of the multiple gooseneck shafts are movably connected to the holes opened in the middle of the adjusting rod.

[0015] Furthermore, a slide is fixedly mounted at the front center of the positioning frame, and a drive motor is fixedly mounted at the right end of the slide. The drive motor is electrically connected to the vehicle controller. A lead screw is fixedly mounted at the left output end of the drive motor. The left and right ends of the lead screw are threaded in opposite directions. Both ends of the lead screw are threadedly connected to slide blocks. The outer side of the slide block is slidably connected to the middle of the slide. A connecting rod is movably connected to the top of the slide block. The top of the connecting rod is movably connected to the end of the adjusting rod facing the middle of the positioning rod.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] This utility model provides a large-capacity LNG vehicle-mounted gas cylinder. The vehicle-mounted controller and drive motor work together to open and close the air damper. The blower and electric heating wire work together to provide part of the heat required for the liquefied natural gas gasification process of the booster gasifier. The blower can provide air cooling treatment for components such as the booster gasifier, thereby improving the problems of large heat gap and insufficient stability of the booster gasifier in low-temperature environments.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a perspective view of the booster vaporizer of this utility model;

[0022] Figure 3 This is a perspective view of the bracket of this utility model;

[0023] Figure 4 This is a front sectional view of the LNG vehicle-mounted gas cylinder assembly of this utility model;

[0024] Figure 5 This is an exploded view of the mounting bracket of this utility model;

[0025] Figure 6 This is a utility model Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a half-sectional perspective view of the positioning frame of this utility model;

[0027] Figure 8 This is a utility model Figure 7 Enlarged view of point B in the middle;

[0028] Figure 9 This is a schematic diagram of the circuit control process of this utility model.

[0029] Figure label:

[0030] LNG vehicle-mounted gas cylinder assembly-1; casing-11;

[0031] Booster vaporizer-2; Heat exchange fins-21;

[0032] Split bracket-3; First protective plate-31; Second protective plate-32;

[0033] Bracket-4;

[0034] Mounting bracket - 5; Blower - 51; Positioning bracket - 52; Heating channel - 53; Electric heating wire - 54;

[0035] Positioning frame-7; damper-71; gooseneck shaft-72; adjusting rod-73;

[0036] Carriage-8; Drive motor-81; Lead screw-82; Slide block-83; Connecting rod-84. Detailed Implementation

[0037] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] See attached document Figure 1-9 This utility model provides a large-capacity LNG vehicle-mounted gas cylinder, including an LNG vehicle-mounted gas cylinder assembly 1 and a booster vaporizer 2 mounted thereon, and also includes a bracket 4. The bracket 4 has a mounting frame 5 and a positioning frame 7 detachably connected from bottom to top in the middle.

[0041] A blower 51 is fixedly installed in the middle of the mounting frame 5 to form an air supply array. The blower 51 is electrically connected to a first temperature protection switch. The air outlet of the blower 51 is directly opposite the bottom pipe of the booster vaporizer 2 and the bottom of the LNG vehicle gas cylinder assembly 1. Positioning frames 52 are fixedly installed at the top fan mounting points of the mounting frame 5. A heating flow channel 53 is opened in the middle of the positioning frame 52. An electric heating wire 54 is fixedly installed at the heating flow channel 53 of the positioning frame 52. The electric heating wire 54 is electrically connected to a second temperature protection switch.

[0042] The blower 51 is electrically connected to an on-board controller, which is electrically connected to the electric booster valve of the booster vaporizer 2. The on-board controller is also electrically connected to the pressure sensor configured in the LNG vehicle cylinder assembly 1 and to the pipeline temperature sensor of the booster vaporizer 2.

[0043] When the pressure sensor of the LNG vehicle cylinder assembly 1 reports a pressure data of less than 0.8 MPa, the vehicle controller needs to activate the electric booster valve and start the booster vaporizer 2 to circulate and vaporize the liquefied natural gas in the LNG vehicle cylinder assembly 1. The vaporized natural gas is then returned to the LNG vehicle cylinder assembly 1. When the natural gas pressure in the LNG vehicle cylinder assembly 1 reaches 0.8 MPa-1.2 MPa, the electric booster valve is closed.

[0044] The temperature data received by the temperature sensor on the vehicle controller and the booster vaporizer 2, combined with the feedback data from the pressure sensor inside the LNG vehicle cylinder assembly 1, activates the drive motor 81 to open the damper 71. The blower 51 is then used to cool the pipeline of the booster vaporizer 2 and the outside of the LNG vehicle cylinder assembly 1. Alternatively, the blower can be used in conjunction with the electric heating wire 54 to blow hot air into the booster vaporizer 2 for heating. This prevents the external ambient temperature and the heat generated by the engine from being insufficient to support the booster vaporizer 2's need to pressurize the LNG vehicle cylinder assembly 1.

[0045] Therefore, the electric heating wire 54 only operates in conjunction with the blower 51 under either low temperature or low pressure conditions. Its temperature is determined by data provided by the temperature sensor on the vehicle controller and the booster vaporizer 2, and it starts to operate at least below -15℃.

[0046] Because this equipment is deployed close to the vehicle's engine, the first temperature protection switch and the second thermal protection switch work together, and the electric heating is set between the blower 51 and the damper 71. In order to avoid the high temperature below the LNG vehicle gas cylinder assembly 1 causing the wire harness rubber to burn or melt, the electric heating wire 54 is de-energized. At this time, the blower 51 needs to keep working to increase the air flow rate outside the LNG vehicle gas cylinder assembly 1 for cooling. The start condition for the blower 51 during air cooling is that the pipeline temperature of the booster vaporizer 2 exceeds 50°C.

[0047] The first temperature protection switch is set to prevent the blower 51 from malfunctioning due to overheating. Its switching threshold is 80℃-100℃. The second temperature protection switch has a switching threshold of 70℃-105℃.

[0048] In this embodiment, a cover 11 is detachably snapped onto the front of the LNG vehicle-mounted gas cylinder assembly 1, and the inner rear end of the cover 11 shields the front pipeline of the LNG vehicle-mounted gas cylinder assembly 1.

[0049] The design of the cover 11 at the front of the LNG vehicle-mounted gas cylinder assembly 1 prevents the pipelines at the front of the LNG vehicle-mounted gas cylinder assembly 1 from being directly exposed to the outdoors and damaged by debris splashed up during vehicle operation.

[0050] In this embodiment, split brackets 3 are fixedly installed on the front and rear sides of the bottom of the LNG vehicle-mounted gas cylinder assembly 1. A first protective plate 31 is fixedly installed at the front of the front split bracket 3 of the LNG vehicle-mounted gas cylinder assembly 1 to cooperate with the bottom pipeline at the front side of the booster vaporizer 2. A second protective plate 32 is fixedly installed at the rear of the rear split bracket 3 of the LNG vehicle-mounted gas cylinder assembly 1 to cooperate with the bottom pipeline at the rear side of the booster vaporizer 2.

[0051] The split bracket 3 supports the LNG vehicle-mounted gas cylinder assembly 1 for overhead installation, and together with the first protective plate 31 and the second sliding plate, it forms a shielding protection for the exposed pipelines of the booster vaporizer 2.

[0052] In this embodiment, multiple heat exchange fins 21 are fixed on the outside of the bottom pipe of the booster vaporizer 2.

[0053] The heat exchange fins 21 at the bottom of the booster gasifier 2, in conjunction with its own pipeline, can vaporize the liquefied natural gas in the pipeline through air convection from the external environment.

[0054] In this embodiment, airflow channels are provided on both the left and right sides of the positioning frame 7. Multiple dampers 71 are movably connected at equal intervals on the inner sides of both ends of the positioning frame 7. Gooseneck shafts 72 are fixed at the movable connection between the front of the damper 71 and the positioning frame 7. The top of the front end of the multiple gooseneck shafts 72 are movably connected to the holes opened in the middle of the adjusting rod 73.

[0055] The airflow duct, in conjunction with the damper 71, can redirect the hot air generated by the blower 51 and the electric heating wire 54 to the bottom pipe and heat exchange fins 21 of the booster vaporizer 2 assembly. At the same time, the hot air is blown to the bottom of the LNG vehicle-mounted gas cylinder assembly 1 and then diffused to the outside of the entire equipment.

[0056] In this embodiment, a slide 8 is fixedly mounted at the front center of the positioning frame 7, and a drive motor 81 is fixedly mounted at the right end of the slide 8. The drive motor 81 is electrically connected to the vehicle controller. A lead screw 82 is fixedly mounted at the left output end of the drive motor 81. The left and right ends of the lead screw 82 are threaded in opposite directions. Both ends of the lead screw 82 are threadedly connected to a slide seat 83. The outer side of the slide seat 83 is slidably connected to the center of the slide 8. A connecting rod 84 is movably connected to the top of the slide seat 83. The top of the connecting rod 84 is movably connected to one end of the adjusting rod 73 facing the center of the positioning rod.

[0057] The drive motor 81 and the lead screw 82 work together to drive the two slide blocks 83 to slide in opposite directions on the outside of the slide frame 8. The slide blocks 83 and the connecting rod 84 work together to drive the adjusting rod 73 to slide left and right in front of the positioning frame 7. The adjusting rod 73 and the gooseneck shaft 72 work together to complete the opening and closing of the damper 71.

[0058] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A large-capacity LNG vehicle-mounted gas cylinder, comprising an LNG vehicle-mounted gas cylinder assembly (1) and a booster vaporizer (2) mounted thereon, characterized in that: It also includes a bracket (4), and the bracket (4) is detachably connected from bottom to top to a mounting bracket (5) and a positioning frame (7) in the middle. The mounting frame (5) is fixed in the middle with a blower (51) forming an air supply array. The blower (51) is electrically connected to a first temperature protection switch. The air outlet of the blower (51) is directly opposite the bottom pipe of the booster vaporizer (2) and the bottom of the LNG vehicle gas cylinder assembly (1). The top fan mounting points of the mounting frame (5) are all fixed with positioning frames (52). The middle of the positioning frame (52) is provided with a heating flow channel (53). An electric heating wire (54) is fixed at the heating flow channel (53) of the positioning frame (52). The electric heating wire (54) is electrically connected to a second temperature protection switch. The blower (51) is electrically connected to an on-board controller, which is electrically connected to the electric booster valve of the booster vaporizer (2). The on-board controller is electrically connected to the pressure sensor configured in the LNG vehicle cylinder assembly (1) and the on-board controller is electrically connected to the pipeline temperature sensor of the booster vaporizer (2).

2. A large-volume LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: The front of the LNG vehicle-mounted gas cylinder assembly (1) is detachably snapped with a cover (11), the inner rear end of which shields the front pipeline of the LNG vehicle-mounted gas cylinder assembly (1).

3. The large-volume LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: The LNG vehicle-mounted gas cylinder assembly (1) is fixed with a split bracket (3) on both the front and rear sides of the bottom. The split bracket (3) located at the front of the LNG vehicle-mounted gas cylinder assembly (1) is fixed with a first protective plate (31) that matches the bottom pipeline on the front side of the booster vaporizer (2). The split bracket (3) located at the rear of the LNG vehicle-mounted gas cylinder assembly (1) is fixed with a second protective plate (32) that matches the bottom pipeline on the rear side of the booster vaporizer (2).

4. The large-volume LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: Multiple heat exchange fins (21) are fixed on the outside of the bottom pipe of the booster vaporizer (2).

5. The large-volume LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: The positioning frame (7) has airflow channels on both the left and right sides. Multiple dampers (71) are movably connected at equal intervals on the inner sides of the left and right ends of the positioning frame (7). Gooseneck shafts (72) are fixed at the movable connection between the front of the damper (71) and the positioning frame (7). The top of the front end of the multiple gooseneck shafts (72) are movably connected to the holes in the middle of the adjusting rod (73).

6. A large-capacity LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: A slide (8) is fixedly mounted at the front center of the positioning frame (7). A drive motor (81) is fixedly mounted at the right end of the slide (8). The drive motor (81) is electrically connected to the vehicle controller. A lead screw (82) is fixedly mounted at the left output end of the drive motor (81). The left and right ends of the lead screw (82) are threaded in opposite directions. Both ends of the lead screw (82) are threadedly connected to a slide seat (83). The outer side of the slide seat (83) is slidably connected to the middle of the slide (8). A connecting rod (84) is movably connected to the top of the slide seat (83). The top of the connecting rod (84) is movably connected to one end of the adjusting rod (73) facing the middle of the positioning rod.

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