Protective device for vehicle-mounted LNG storage tank

Abstract

The invention provides a vehicle-mounted LNG storage tank protection device which comprises a vehicle frame and a storage tank assembly arranged above the vehicle frame, a pressurization vaporizer is arranged below the storage tank assembly, and the vehicle-mounted LNG storage tank protection device further structurally comprises a positioning frame, arc-shaped limiting holes are fixedly formed in the left end and the right end of the positioning frame correspondingly, diagonal supporting rods are movably connected to the upper portion and the lower portion of the middle of the positioning frame correspondingly, and the middle of the positioning frame is movably connected with a hydraulic cylinder; the two diagonal supporting rods extend in the directions of two diagonal lines of the positioning frame respectively, the diagonal supporting rods are matched with the steering pin shafts to complete deflectable design of the support on the positioning frame, the steering pin shafts are matched with the arc-shaped limiting holes to complete deflectable angle constraint of the support on the positioning frame, and the diagonal supporting rods are matched with the shock absorbers to complete deflection angle constraint of the support on the positioning frame. The deflection speed of the support and other assemblies on the positioning seat in the collision process is slowed down, protection and deflectable energy absorption design is provided through an all-rigid-connection frame type structure, and the protection design of the storage tank assembly is completed.

Description

Technical Field

[0001] The present invention mainly relates to the field of LNG storage tanks, and in particular to a protective device for a vehicle-mounted LNG storage tank. Background Art

[0002] When assembling on-board LNG storage tanks on freight vehicles, they usually adopt a central backpack type or a frame beam external hanging structure. The tank body is usually a multi-layer structure and will also be protected by the installation frame in the event of a collision accident. The current common assembly method of on-board LNG storage tanks on freight vehicles is usually a rigid connection structure. The common double tank configuration plus the installation frame has an overall weight of more than two tons after being filled with liquefied natural gas.

[0003] In the process of the traffic accident, due to the structure of two tanks stacked on top of each other, the overall structure has a high center of gravity, and the rigid connection structure between the bracket and the frame is prone to breakage, causing the tanks to fall off the frame.

[0004] The inventors proposed a protective device for vehicle-mounted LNG storage tanks. By adding a frame-type protective component with an all-steel structure to the outside of the tank and the bracket, combined with a deflectable energy absorption design, this device avoids safety accidents such as the tank falling off the top of the frame in general traffic accidents, and improves the protective design of the tank. Summary of the Invention

[0005] 1. Problems to be solved by the invention: The present invention provides a protective device for a vehicle-mounted LNG storage tank, which is used to solve the technical problem mentioned in the background art that the rigid connection between the existing storage tank and the vehicle frame through the bracket assembly is easy to break in a traffic accident.

[0006] 2. Technical solution: To achieve the above objectives, the present invention provides a technical solution: a protective device for a vehicle-mounted LNG storage tank, comprising a vehicle frame and a storage tank assembly disposed above the vehicle frame, a supercharged vaporizer disposed below the storage tank assembly, and further comprising the following structure: The positioning frame has arc-shaped limiting holes fixed on both ends of the left and right ends, and the middle part of the positioning frame is movably connected with diagonal support rods at the upper and lower parts, and the two diagonal support rods extend along the two diagonal directions of the positioning frame respectively.

[0007] The bracket has a deflection pin shaft that matches the arc-shaped limiting hole fixed in the middle of the bottom surface of the bracket. The deflection angle of the deflection pin shaft in the arc-shaped limiting hole is within the range of ±12°. The middle of the top of the bracket is detachably connected to the tank assembly. The front and rear sides of the bracket are respectively fixedly connected to the front and rear sides of the bottom of the longitudinal extension frame by bolts. The bottom of the bracket is fixedly connected to the bracket by bolts.

[0008] Furthermore, the center of the inner wall arc of the arc-shaped limiting hole is on the longitudinal mid-perpendicular line of the frame, and the arc-shaped limiting holes are stacked on the left and right sides of the middle of the frame and are arranged on the positioning frame.

[0009] Furthermore, the left and right sides of the bottom of the positioning frame are fixedly connected with connecting plates by bolts, and the opposite sides of the two connecting plates are fixedly connected to the left and right sides of the frame respectively. The four corners of the positioning frame are close to the diagonal support rods and the outer side of the limit pins are in conflict with the outer side of the diagonal support rods. The four corners of the positioning seat are movably connected with shock absorbers, and the opposite sides of the two shock absorbers located at the diagonals of the positioning seat are movably connected to the left and right ends of the diagonal support rods respectively.

[0010] Furthermore, the front and rear sides of the top of the bracket respectively conflict with the front and rear sides of the bottom of the limiting belt, and the front and rear sides of the bottom of the limiting belt are fixed with limiting bolts. The bottom of the limiting bolt and the top of the bracket are locked by a nut, and the bottom of the bracket is fixed with an assembly hole that cooperates with the supercharged carburetor.

[0011] Furthermore, the left and right sides of the longitudinal extension frame are fixedly connected with side frames by bolts, and the outermost distance between the two side frames is greater than the outermost distance between the left and right ends of the tank assembly.

[0012] Furthermore, a hatch is provided on the outer side of the top of the longitudinal extension frame, and the left and right sides of the inner wall of the hatch are respectively fitted with the outer sides of the two side frames, and hatch doors are provided on both left and right ends of the hatch.

[0013] Furthermore, the four corners of the bracket are fixedly connected with side bars by bolts, and the outer sides of the four side bars are respectively fixedly connected with the front and rear sides of the left and right ends of the two side frames by bolts.

[0014] Furthermore, a positioning shaft is fixedly provided in the middle of the two diagonal struts, and the top and bottom of the positioning shaft are movably connected to the top and bottom surfaces of the middle of the positioning frame respectively, and the left and right opposite sides of the two diagonal struts are movably connected to the front and rear sides of the two deflection pin shafts respectively.

[0015] 3.Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a protective device for a vehicle-mounted LNG storage tank. The diagonal brace cooperates with the steering pin shaft to complete the deflectable design of the bracket on the positioning frame. The steering pin shaft cooperates with the arc-shaped limit hole to complete the deflection angle constraint of the bracket on the positioning frame. The diagonal brace and the shock absorber cooperate to slow down the deflection speed of the bracket and other components on the positioning seat during the collision. The frame structure with all-steel connections provides protection and deflectable energy absorption design, completing the protective design of the tank assembly, and preventing the tank assembly from directly falling off the frame in a traffic accident.

[0016] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the hatch cover structure of the present invention on the vehicle frame; Figure 2 Schematic diagram of the bracket of the present invention being deflected on the positioning frame Figure 1 ; Figure 3 It is a schematic diagram of the assembly state of the longitudinal extension frame and the side frame of the present invention above the vehicle frame; Figure 4 Schematic diagram of the bracket of the present invention being deflected on the positioning frame Figure 2 ; Figure 5 For the present invention Figure 4 A magnified view of the structure at center A; Figure 6 A perspective view of the storage tank assembly structure of the present invention; Figure 7 is a three-dimensional diagram of the support structure of the present invention; Figure 8 An exploded view of the side frame structure of the present invention; Figure 9 is a perspective view of the longitudinal extension frame structure of the present invention; Figure 10 A half-section perspective view of the positioning frame structure of the present invention; Figure 11 A top cross-sectional view of the positioning frame structure of the present invention; Figure 12 For the present invention Figure 11 A magnified view of the structure at B in the middle.

[0018] Reference numerals: 1- Frame; 2-Storage tank assembly; 3-supercharged carburetor; 4- positioning frame; 41- arc-shaped limiting hole; 42- connecting plate; 43- limiting pin; 44- shock absorber; 5-diagonal support rod; 51-positioning axis; 6-bracket; 61-deflection pin; 62-limiting belt; 63-limiting bolt; 64-assembly hole; 7-longitudinal extension frame; 71-side frame; 8-bracket; 81-side bar; 9-Hatch cover; 91-Hatch door. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be an element in the middle; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element in the middle; the terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items. Example

[0022] Reference Figure 1-12 A protective device for a vehicle-mounted LNG storage tank includes a vehicle frame 1 and a storage tank assembly 2 disposed above the vehicle frame 1, a supercharged vaporizer 3 disposed below the storage tank assembly 2, and the following structure: The positioning frame 4 has arc-shaped limiting holes 41 fixed on both ends of the left and right sides of the positioning frame 4. The middle part of the positioning frame 4 is movably connected to diagonal support rods 5 on the upper and lower sides. The two diagonal support rods 5 extend along the two diagonal directions of the positioning frame 4 respectively.

[0023] Bracket 6, a deflection pin 61 that cooperates with the arc-shaped limiting hole 41 is fixed in the middle of the bottom surface of the bracket 6, and the deflection angle of the deflection pin 61 in the arc-shaped limiting hole 41 is within the range of ±12°. The middle of the top of the bracket 6 is detachably connected to the tank assembly 2, and the front and rear sides of the bracket 6 are respectively fixedly connected to the front and rear sides of the bottom of the longitudinal extension frame 7 by bolts. The bottom of the bracket 6 is fixedly connected to the bracket 8 by bolts.

[0024] In this embodiment, the inner wall arc center of the arc-shaped limiting hole 41 is on the longitudinal mid-perpendicular line of the frame 1 , and the arc-shaped limiting holes 41 are stacked on the positioning frame 4 about the middle of the frame 1 .

[0025] The centers of the two arc-shaped limit holes 41 are on the median perpendicular line of the frame 1, ensuring that the bracket 6 and the tank assembly 2 are passively deflected on the positioning frame 4 after a collision accident, and the overall center of gravity of the components such as the tank assembly 2 and the bracket 6 is maintained near the median perpendicular line of the frame 1, avoiding the bracket 6 and the tank assembly 2 weighing nearly two tons after full load from causing a large change in the center of gravity of the vehicle.

[0026] In this embodiment, the left and right sides of the bottom of the positioning frame 4 are fixedly connected with connecting plates 42 by bolts, and the opposite sides of the two connecting plates 42 are fixedly connected to the left and right sides of the frame 1 respectively. The four corners of the positioning frame 4 are close to the diagonal support rod 5 and the limit pins 43 are inserted. The outer side of the limit pin 43 is in conflict with the outer side of the diagonal support rod 5. The four corners of the positioning seat are movably connected with shock absorbers 44. The opposite sides of the two shock absorbers 44 located at the diagonals of the positioning seat are movably connected to the left and right ends of the diagonal support rod 5 respectively.

[0027] The connecting plate 42 completes the assembly of the positioning frame 4 on the vehicle frame 1, wherein the limit pin 43 cooperates with the diagonal brace 5 to prevent the bracket 6 and the tank assembly 2 from deflecting above the positioning frame 4 due to vibration during normal driving of the vehicle. When a large impact occurs in a traffic accident, the diagonal brace 5 cooperates with the deflection pin shaft 61 to deflect and squeeze the limit pin 43 off.

[0028] In this embodiment, the front and rear sides of the top of the bracket 6 respectively contact the front and rear sides of the bottom of the limiting belt 62. The front and rear sides of the bottom of the limiting belt 62 are fixed with limiting bolts 63. The bottom of the limiting bolt 63 is locked with the top of the bracket 6 by a nut. The bottom of the bracket 6 is fixed with an assembly hole 64 that cooperates with the supercharged carburetor 3.

[0029] The limiting belt 62 cooperates with the limiting bolt 63 to complete the assembly and fixation of the tank assembly 2 on the bracket 6. The assembly hole 64 below the bracket 6 is convenient for the user to pass the relevant pipelines of the supercharged vaporizer 3 through for installation, thereby optimizing the pipeline installation path.

[0030] In this embodiment, the left and right sides of the longitudinal extension frame 7 are fixedly connected with side frames 71 by bolts, and the outermost distance between the two side frames 71 is greater than the outermost distance between the left and right ends of the tank assembly 2.

[0031] The combined structure of the longitudinal extension frame 7 and the side frame 71 can form a frame structure protection for the tank assembly 2 and its configured pipelines on the bracket 6, preventing external impact objects from directly colliding with the tank assembly 2 in the event of a traffic accident, and reserving time for safety components such as the self-closing valve and safety pressure relief valve of the tank assembly 2 to start and function.

[0032] In this embodiment, a hatch 9 is provided on the outer side of the top of the longitudinal extension frame 7. The left and right sides of the inner wall of the hatch 9 are respectively in contact with the outer sides of the two side frames 71. The left and right ends of the hatch 9 are provided with hatch doors 91.

[0033] The design of the hatch 9 and the hatch door 91 is for the beautification and decoration needs of the equipment. It can also be formed into a semi-enclosed protective structure by using materials such as aluminum alloy plates according to the customization needs of customers.

[0034] In this embodiment, the four corners of the bracket 8 are fixedly connected to side bars 81 by bolts, and the outer sides of the four side bars 81 are fixedly connected to the front and rear sides of the left and right ends of the two side frames 71 by bolts.

[0035] The combination of the bracket 8 and the side bar 81 provides installation support for the side frame 71, and cooperates with the longitudinal extension frame 7 to provide frame-type structural protection for the tank assembly 2. When a safety accident occurs, the side bar 81 and the side frame 71 are usually the first to collide with the external impactor. The overall structure formed by the side bar 81, the bracket 8, the side frame 71, the longitudinal extension frame 7 and the bracket 6 slides in the arc-shaped limit hole 41 through the deflection pin 61, and the diagonal support rod 5 is deflected. The shock absorber 44 starts to absorb energy and cooperates with the arc-shaped limit hole 41 to slow down the deflection speed of the tank assembly 2 on the frame 1 and constrain the deflection angle, so as to prevent the impact energy of the external impactor from acting entirely on the tank assembly 2.

[0036] In this embodiment, a positioning shaft 51 is fixedly provided in the middle of the two diagonal struts 5, and the top and bottom of the positioning shaft 51 are movably connected to the top and bottom surfaces of the middle of the positioning frame 4 respectively, and the left and right opposite sides of the two diagonal struts 5 are movably connected to the front and rear sides of the two deflection pin shafts 61 respectively.

[0037] The positioning shaft 51 completes the assembly of the two diagonal struts 5 on the positioning seat. The diagonal struts 5 cooperate with the steering pin shaft to complete the deflectable design of the bracket 6 on the positioning frame 4. The steering pin shaft cooperates with the arc-shaped limit hole 41 to complete the deflectable angle constraint of the bracket 6 on the positioning frame 4. The diagonal struts 5 and the shock absorber 44 cooperate to slow down the deflection speed of the bracket 6 and other components on the positioning seat during the collision. The frame structure with all-steel connections provides protection and deflectable energy absorption design to complete the protection design of the tank assembly 2.

[0038] Components such as the positioning frame 4 in this product do not exceed the size of components such as the storage tank and the bracket 6, saving installation space on the frame 1, making it convenient for users to choose deployment and use.

[0039] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A protective device for a vehicle-mounted LNG storage tank, comprising a vehicle frame (1) and a storage tank assembly (2) arranged above the vehicle frame (1), wherein a supercharged vaporizer (3) is arranged below the storage tank assembly (2), and characterized in that: It also includes the following structure: A positioning frame (4), wherein both left and right ends of the positioning frame (4) are fixedly provided with arc-shaped limiting holes (41), and the middle portion of the positioning frame (4) is movably connected to diagonal support rods (5) at the upper and lower parts, and the two diagonal support rods (5) extend along the two diagonal directions of the positioning frame (4); A bracket (6) is provided with a deflection pin (61) that matches the arc-shaped limiting hole (41) in the middle of the bottom surface of the bracket (6), and the deflection angle of the deflection pin (61) in the arc-shaped limiting hole (41) is within the range of ±12°. The top middle of the bracket (6) is detachably connected to the storage tank assembly (2), and the front and rear sides of the bracket (6) are respectively fixedly connected to the front and rear sides of the bottom of the longitudinal extension frame (7) by bolts. The bottom of the bracket (6) is fixedly connected to the bracket (8) by bolts.

2. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: The center of the inner wall arc of the arc-shaped limiting hole (41) is on the longitudinal mid-perpendicular line of the vehicle frame (1), and the arc-shaped limiting hole (41) is stacked on the left and right sides of the middle of the vehicle frame (1) and is arranged on the positioning frame (4).

3. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: The left and right sides of the bottom of the positioning frame (4) are fixedly connected with connecting plates (42) by bolts, and the opposite sides of the two connecting plates (42) are fixedly connected with the left and right sides of the vehicle frame (1) respectively. The four corners of the positioning frame (4) are close to the diagonal support rod (5) and the limit pins (43) are inserted. The outer side of the limit pin (43) contacts the outer side of the diagonal support rod (5). The four corners of the positioning seat are movably connected with shock absorbers (44). The opposite sides of the two shock absorbers (44) located at the diagonal corners of the positioning seat are movably connected with the left end and the right end of the diagonal support rod (5) respectively.

4. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: The front and rear sides of the top of the bracket (6) respectively contact the front and rear sides of the bottom of the limiting belt (62), and the front and rear sides of the bottom of the limiting belt (62) are fixed with limiting bolts (63). The bottom of the limiting bolt (63) is locked with the top of the bracket (6) by a nut. The bottom of the bracket (6) is fixed with an assembly hole (64) that matches the supercharged carburetor (3).

5. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: The left and right sides of the longitudinal extension frame (7) are both fixedly connected to side frames (71) by bolts, and the outermost distance between the two side frames (71) is greater than the outermost distance between the left and right ends of the storage tank assembly (2).

6. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: A hatch cover (9) is provided on the outer side of the top of the longitudinal extension frame (7), and the left and right sides of the inner wall of the hatch cover (9) are respectively fitted with the outer sides of the two side frames (71), and hatch doors (91) are provided at both left and right ends of the hatch cover (9).

7. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: The four corners of the bracket (8) are fixedly connected to side bars (81) by bolts, and the outer sides of the four side bars (81) are respectively fixedly connected to the front and rear sides of the left and right ends of the two side frames (71) by bolts.

8. The protective device for a vehicle-mounted LNG storage tank according to claim 1, characterized in that: A positioning shaft (51) is fixedly provided in the middle of the two diagonal braces (5), and the top and bottom of the positioning shaft (51) are movably connected to the top and bottom surfaces of the middle of the positioning frame (4), respectively. The left and right opposite sides of the two diagonal braces (5) are movably connected to the front and rear sides of the two deflection pin shafts (61), respectively.

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