CN205149517U - CNG gas cylinder fixing device - Google Patents

Abstract

The utility model proposes a CNG gas cylinder fixing device, which includes: a gas cylinder shield, a shield fixing frame, a gas cylinder bracket, a gas cylinder fastening belt and a gas cylinder bracket, and the gas cylinder bracket is fixed in a group of two The same height of the gas cylinder bracket forms a gas cylinder fixing layer, the CNG gas cylinder is installed on the gas cylinder bracket, and is fastened by the gas cylinder fastening belt, and the shield fixing frame is fixedly connected around the outer circumference of the gas cylinder bracket On the gas cylinder bracket, the gas cylinder shield is installed on the shield fixed frame. Compared with the traditional gas cylinder fixing device, the gas cylinder fixing device of the utility model has unique advantages such as less types of parts, convenient disassembly, reliable fixing, convenient maintenance and use, strong versatility, and light weight. At the same time, it adopts layered assembly, It can improve the assembly efficiency of the gas cylinder group, and can well solve the problem of the arrangement of the rear CNG wound gas cylinder group behind the cab of a commercial vehicle, and has broad market prospects.

Description

A CNG cylinder fixing device

technical field

The utility model belongs to the field of vehicle gas supply, in particular to a CNG cylinder fixing device, in particular to a rear CNG winding gas cylinder group fixing device.

Background technique

At present, in the field of commercial gas vehicles, there are many kinds of fixing devices for rear gas cylinders, but most of the fixing devices for gas cylinders have problems such as heavy cylinder frames, difficult disassembly, and difficult fixing of gas cylinders, which seriously limit the use of CNG gas cylinders. In the prior art, there is not yet a CNG (compressed natural gas) gas cylinder fixing device that is easy to disassemble, light in weight and simple in structure, especially a fixing device suitable for rear CNG winding gas cylinder groups.

Utility model content

Based on the above-mentioned existing technical problems, the utility model innovatively proposes a CNG gas cylinder fixing device with a new structure, including gas cylinder shields, shield fixing frames, gas cylinder brackets, gas cylinder fastening belts and gas cylinder brackets, etc. Compared with the traditional gas cylinder fixing device, the fixing device described in the utility model has unique advantages such as less types of parts, convenient disassembly, reliable fixing, convenient maintenance and use, strong versatility, and light weight. At the same time, it adopts layered assembly, which can Improving the packaging efficiency of the gas cylinders can well solve the problem of the layout of the rear CNG wound gas cylinders behind the cab of commercial vehicles, and has broad market prospects.

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A CNG gas cylinder fixing device, comprising: a gas cylinder shield 1, a shield fixing frame, a gas cylinder bracket 4, a gas cylinder fastening belt 5 and a gas cylinder bracket 7, and the gas cylinder bracket 4 takes two as one The group is fixed at the same height of the gas cylinder bracket 7 to form a gas cylinder fixing layer. The CNG gas cylinder is installed on the gas cylinder bracket 4 and fastened by the gas cylinder fastening belt 5. The shield fixing frame is connected to the gas cylinder bracket 7 around the periphery of the gas cylinder bracket 7, and the gas cylinder shield 1 is installed on the shield fixing frame.

Further according to the CNG cylinder fixing device described in the present utility model, wherein the gas cylinder bracket 7 includes a bracket base, a front column 21 and a rear column 26, the front column 21 includes a left front column and a right front column, and the rear column 26 includes a left rear column and a right rear column, and the left front column, the right front column, the left rear column and the right rear column are vertically fixed on the support base, and are at four apex positions of a rectangle, and the gas cylinder support 7 There are several gas cylinder fixing layers along the height direction, one gas cylinder bracket in each gas cylinder fixing layer is fixedly connected between the left front column and the left rear column, and the other gas cylinder bracket is fixedly connected between the right front column and the right between the rear uprights.

Further according to the CNG cylinder fixing device described in the present utility model, it also includes a connecting beam 6, and the connecting beam 6 is transversely connected between the left front column and the right front column, and/or the left rear column and the Between the right rear uprights.

Further according to the CNG gas cylinder fixing device described in the present utility model, wherein at the setting position of each gas cylinder fixing layer, between the left front column and the right front column and between the left rear column and the right rear column are all connected There is a connecting beam 6.

Further according to the CNG gas cylinder fixing device described in the present utility model, wherein the bracket base of the gas cylinder bracket includes a bracket beam 22, a bracket sub-beam 23, a bracket longitudinal beam 24 and a lower support 25, and the bracket sub-beam 23 includes There are two and arranged parallel to each other along the longitudinal direction, the support beam 22 includes two and is arranged on the support sub-beam 23 parallel to each other along the transverse direction, and the support longitudinal beam 24 includes two and is parallel to each other along the longitudinal direction are arranged between the support beams 22, and the support longitudinal beams 24 are above the support sub-beams 23, and the lower supports 25 include two, respectively arranged on the two support longitudinal beams 24, The bottom ends of the left front column, the right front column, the left rear column and the right rear column are fixed on the support sub-beam 23, and the inner sides of the left front column and the left rear column respectively abut against the two sides of a lower support, The inner sides of the right front column and the right rear column abut against two sides of the other lower support respectively.

Further according to the CNG cylinder fixing device described in the present invention, arc-shaped grooves are arranged on the lower support 25, and bolt guide brackets are arranged on both sides of the arc-shaped grooves.

Further according to the CNG cylinder fixing device described in the present utility model, wherein the shield fixing frame includes a lower longitudinal beam 2, a vertical beam 3, an upper beam 8 and an upper longitudinal beam 9, and the lower longitudinal beam 2 includes two and are respectively connected between the left ends of the two support beams 22 and between the right ends of the two support beams 22, the upper beam 8 includes two and is respectively arranged on the top of the front column and the rear column At the top, the upper longitudinal beam 9 includes several roots and is connected between two upper beams 8, and the vertical beam 3 includes several roots and is connected to the end of the upper beam 8 and the support beam 22 respectively. between the ends.

Further according to the CNG gas cylinder fixing device described in the present utility model, wherein said gas cylinder shield 1 comprises a left side shield 51, a top shield 52, a right side shield 53, a right rear shield 54, a rear middle shield Cover 55 and left rear shield 56, described left shield 51 is installed on the left side of described shield fixing frame, and described right rear shield 54, rear middle shield 55 and left rear shield 56 are installed on all The rear side of the fixed frame of the shield, the right side shield 53 is installed on the right side of the fixed frame of the shield, the top shield 52 is installed on the top of the fixed frame of the shield, and is set on the Above the left side shield 51, the right side shield 53, the right rear shield 54, the rear middle shield 55 and the left rear shield 56.

Further according to the CNG gas cylinder fixing device described in the present utility model, wherein the gas cylinder bracket 4 is formed by a bracket plate 32, bolt holes are processed on both sides of the bracket plate 32, and the bracket plate 32 The bottom of the bottom is formed with a flanging structure, and the top of the bracket plate 32 is provided with an arc-shaped groove inwardly, and an arc-shaped supporting plate 34 is arranged in the arc-shaped groove, and bolt guide brackets 33 are arranged on both sides of the arc-shaped groove.

Further according to the CNG gas cylinder fixing device described in the present utility model, wherein the gas cylinder fastening belt 5 has a U-shaped structure, and two ends of the U-shape are formed with fine teeth that can pass through the bolt guide bracket 33 Long bolt 41.

The technical scheme of the utility model has the following technical effects:

1), the utility model is the first to create a new structure of CNG cylinder fixing device, based on the innovative design of the gas cylinder shield, lower longitudinal beam, vertical beam, gas cylinder bracket, gas cylinder fastening belt, connecting beam, gas cylinder The assembly structure of the bottle bracket, the upper beam and the upper longitudinal beam realizes the fixing of the multi-layer gas cylinder group, which solves the problem of fixing the CNG gas cylinder of the commercial vehicle, especially the rear CNG winding gas cylinder group in the cab of the commercial vehicle The following layout and fixing problems, broad market prospects;

2) The CNG gas cylinder fixing device proposed by the utility model has a simple and compact overall structure, takes up little space for the vehicle, and has the advantages of simple structural design, few types of parts, light weight, easy disassembly, and good fixing reliability , Strong fixed bearing capacity, convenient maintenance and use, integration, generalization and other unique advantages and effects;

3), the CNG gas cylinder fixing device described in the utility model can make full use of the tooling equipment conditions of the existing workshop and adopt the means of hoisting to carry out layered installation to the CNG gas cylinder, which greatly improves the safety of the gas cylinder group on the described fixing device. Equipped with efficiency, promotes the widespread use on commercial vehicles.

Description of drawings

Accompanying drawing 1 is the overall structure schematic diagram of the CNG cylinder fixing device described in the utility model;

Accompanying drawing 2 is the structural representation of the gas cylinder support in the CNG gas cylinder fixing device described in the utility model;

Accompanying drawing 3 is the structural representation of the gas cylinder bracket in the CNG gas cylinder fixing device described in the utility model;

Accompanying drawing 4 is the structural representation of the gas cylinder fastening belt in the CNG gas cylinder fixing device described in the utility model;

Accompanying drawing 5 is the structural representation of the gas cylinder shield in the CNG gas cylinder fixing device described in the utility model;

The meaning of each reference mark in the figure is as follows:

1-gas cylinder shield, 2-lower longitudinal beam, 3-vertical beam, 4-gas cylinder bracket, 5-gas cylinder fastening belt, 6-connecting beam, 7-gas cylinder bracket, 8-upper beam, 9 -Upper stringer, 10-CNG cylinders;

21-front column, 22-bracket beam, 23-bracket sub-beam, 24-bracket longitudinal beam, 25-lower support, 26-back column;

31-bolt guide bracket, 32-bracket plate, 33-bolt guide bracket, 34-arc supporting plate;

41 - long bolts with fine teeth;

51-left shield, 52-top shield, 53-right shield, 54-right rear shield, 55-rear middle shield, 56-left rear shield.

detailed description

The technical scheme of the utility model will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can understand the utility model more clearly, but the protection scope of the utility model is not limited thereby.

As shown in accompanying drawing 1, the CNG gas cylinder fixing device described in the utility model overall comprises a gas cylinder shield 1, a lower longitudinal beam 2, a vertical beam 3, a gas cylinder bracket 4, a gas cylinder fastening belt 5, a connecting Crossbeam 6, gas cylinder support 7, upper crossbeam 8 and upper longitudinal beam 9, described gas cylinder bracket 4 is fixed side by side on the same fixed layer of described gas cylinder support 7 with two as a group, CNG gas cylinder 10 directly Supported on the gas cylinder bracket 4, and the CNG gas cylinder 10 is fastened on the gas cylinder bracket 4 through the gas cylinder fastening belt 5, and the connecting beam 6 is fixed on the gas cylinder bracket 7 to strengthen The strength of the gas cylinder support, the lower longitudinal beam 2, the vertical beam 3, the upper beam 8 and the upper longitudinal beam 9 are fixed on the gas cylinder support with bolts to form a shield fixed frame around the gas cylinder support, and the gas cylinder shield The cover 1 is fixedly connected to the fixed frame of the shield, thereby forming an integral CNG cylinder fixing device which is independently installed on the body of the commercial vehicle.

Described cylinder support 7 is as the core component of whole fixing device, as shown in accompanying drawing 2, comprises front column 21, support beam 22, support subbeam 23, support longitudinal beam 24, lower support 25 and rear column 26, The two bracket sub-beams 23 are arranged parallel to each other, the two bracket beams 22 are fixed on the two bracket sub-beams 23 parallel to each other, and the bracket sub-beams 23 and the bracket beams 22 are perpendicular to each other, the specific two bracket sub-beams 23 are arranged longitudinally parallel to each other, and two support beams 22 are fixed on two support sub-beams parallel to each other along the transverse direction, and two support longitudinal beams 24 are connected between the two support beams 22, and each support longitudinal beam The beam 24 is connected between two support beams 22 on a corresponding support sub-beam 23, and the support beam 22 and the support longitudinal beam 24 form a support chassis in the same plane, and are vertically arranged on the support sub-beams. On the beam, the support base of the gas cylinder support is jointly formed by the support beam 22 , the support sub-beam 23 , the support longitudinal beam 24 and the lower support 25 . The front column 21 and the rear column 26 each include two, and the bottom ends of the two front columns 21 are respectively fixedly connected to the upper surfaces of the two bracket sub-beams 23 and are close to the outer surface of the front bracket beam 22. , the bottom ends of the two rear columns 26 are respectively fixedly connected to the upper surfaces of the two bracket sub-beams 23 and are closely attached to the outer surface of the rear bracket beam 22, and the two front columns 21 and the two rear columns 26 are parallel to each other. extending vertically upwards. A described lower support 25 is arranged between the front column on the left side and the rear column on the left side, and the lower support 25 is arranged on the support chassis between the front column and the rear column, and the bottom surface of the lower support 25 Close to the upper surface of the bracket stringer 24 on the left side, the front and rear side walls of the lower support 25 are respectively close to the inner surfaces of the front column and the rear column, similarly between the right front column and the right rear column A lower support 25 is also provided, and the lower support 25 is arranged on the support chassis between the front column and the rear column, that is, the bottom surface of the lower support 25 is close to the upper surface of the support longitudinal beam 24 on the right side , the front and rear side walls of the lower support 25 are respectively in close contact with the inner surfaces of the front column and the rear column. Two lower supports 25 are arranged side by side to form the first layer of gas cylinder fixing frame on the support base, and each lower support 25 is provided with two arc-shaped grooves for placing gas cylinders, and the lower support is placed on each arc-shaped groove simultaneously. Both sides of the slot are provided with bolt guide brackets for fixing the gas cylinders placed in the arc-shaped slot. Several groups of bolt holes are arranged on the front column and the rear column along their length extension direction, and are used to fix multiple sets of gas cylinder brackets in the length direction of the front column and the rear column, so as to fix multi-layer gas cylinder brackets on the gas cylinder bracket. bottle. The front column 21 and the rear column 26 are selected to be bent into a U-shaped structure to improve material utilization and reduce weight.

Described gas cylinder bracket 4 comprises several, and every two is fixed on the same height of gas cylinder bracket as a gas cylinder fixing layer, is fixed with several groups along the length direction of gas cylinder bracket The gas cylinder bracket is to meet the multi-layer fixation of the CNG gas cylinder group. The two gas cylinder brackets of each group of gas cylinder brackets are arranged in parallel and side by side at the same height of the column of the gas cylinder bracket. Specifically, one gas cylinder bracket is fixedly connected to the left front column and Between the left rear upright, another cylinder support is fixedly connected between the right front upright and the right rear upright. The structure of described gas cylinder support is as shown in accompanying drawing 3, is formed by bracket plate 32, and described bracket plate 32 whole forms with steel plate bending, is processed with bolt hole on the both sides of bracket plate 32, Thus, the gas cylinder bracket is fixed on the column of the gas cylinder bracket by bolts, the bottom of the bracket plate 32 is formed with a flanging structure, and the top of the bracket plate 32 is provided with two arc-shaped grooves inwardly. , each arc-shaped groove is provided with an arc-shaped supporting plate 34, and the bottom flanging structure on both sides of each arc-shaped groove is provided with a bolt guide bracket 33, so as to avoid the deviation of the bolt during the tightening process, Bolt holes are provided on the bolt guide bracket 33, and two gas cylinders can be fixed on each gas cylinder fixing layer, and each gas cylinder is placed in a group of arc-shaped grooves of two gas cylinder brackets. Simultaneously, some connecting beams 6 are fixedly connected between the two front columns of the gas cylinder support, and some connecting beams 6 are also fixedly connected between the two rear columns, and the front and rear columns are processed with connecting beam fixing screw holes, specifically A connecting crossbeam 6 is respectively fixedly connected between the two front uprights and the two rear uprights at the position of each gas cylinder fixing layer, so as to ensure the service strength of the gas cylinder bracket.

The gas cylinder fastening belt 5 has a U-shaped structure matching the shape of the gas cylinder, and the two ends of the gas cylinder fastening belt 5 are respectively formed with long bolts 41 with fine teeth. When inside, the gas cylinder fastening belt 5 is clamped on the gas cylinder, and the long bolts 41 with thin teeth at both ends of the gas cylinder fastening belt respectively pass through the bolt guide brackets 33 on both sides of the arc groove and are fixed on the bolts, realizing gas Fastening of the bottle.

The lower longitudinal beam 2 is connected between the left two ends of the support beam 22, the lower longitudinal beam 2 is also connected between the right two ends of the support beam 22, and the top ends of the two front pillars 21 are transversely connected. On one upper beam 8, the tops of the two rear columns 26 are transversely connected to another upper beam 8, and several upper longitudinal beams 9 are connected between the two upper beams 8, at least between the ends of the two upper beams 8. An upper longitudinal beam 9 is connected, a vertical beam 3 is connected between one end of the upper beam 8 and the corresponding end of the bracket beam 22, and a vertical beam is connected between the left end of the front upper beam and the left end of the front bracket beam 3. A vertical beam 3 is connected between the right end of the front upper beam and the right end of the front bracket beam, a vertical beam 3 is connected between the left end of the rear upper beam and the left end of the rear bracket beam, and the right end of the rear upper beam is connected to the rear bracket A vertical beam 3 is connected between the right ends of the beams, so that the lower longitudinal beam 2, the vertical beam 3, the upper beam 8, and the upper longitudinal beam 9 are fixed around the periphery of the cylinder support 7 to form a fixed frame for the shield.

Described cylinder shield 1 comprises left side shield 51, top shield 52, right side shield 53, right rear shield 54, rear middle shield 55 and left rear shield 56, described left side shield 51 Installed and fixed on the left side of the above-mentioned shield fixed frame, the right rear shield 54, the rear middle shield 55 and the left rear shield 56 are jointly installed and fixed on the rear side of the above-mentioned shield fixed frame, the right shield 53 is installed and fixed on the right side of the above-mentioned shield fixed frame, and the top shield 52 is installed and fixed on the top of the above-mentioned shield fixed frame, and is covered with the left shield 51, the right shield 53, and the right rear shield 54. Above the rear middle shield 55 and the left rear shield 56. The gas cylinder shield 1 is made of materials, so as to form an all-metal protection outside the gas cylinder bracket, and at the same time, a ventilation device is provided on the gas cylinder shield to prevent the accumulation of combustible gas due to gas leakage. At the same time, by setting reasonable ventilation holes, the wind resistance of the whole vehicle can be effectively reduced, and the economy of the whole vehicle can be improved.

When using the fixing device described in the utility model to carry out the gas cylinder fixing operation, two CNG gas cylinders are hoisted and fixed on the lower support 25 of the gas cylinder bracket 7 to form the first gas cylinder layer, and then further on the gas cylinder bracket Install two gas cylinder brackets 4 on 7, the gas cylinder bracket 4 should be installed directly above the first gas cylinder layer, hoist the CNG gas cylinder on the gas cylinder bracket 4 and fix it with the gas cylinder fastening belt 5 , forming the second gas cylinder layer, followed by the installation of the third and fourth gas cylinder layers in sequence. After all the CNG gas cylinders are installed, the vertical beam 3, the lower longitudinal beam 2, the upper beam 8 and the upper longitudinal beam 9 are installed, and finally The gas cylinder guard 1 is installed to form a fully assembled CNG gas cylinder fixing device, which is integrally installed on the body of the commercial vehicle.

The utility model uses the gas cylinder bracket as the core support frame of the gas cylinder, and the CNG gas cylinder can be layered and fixed on the gas cylinder bracket through the gas cylinder bracket, and at the same time, the gas cylinder shield is fixed on the outer periphery of the gas cylinder bracket to form a complete Gas bottle holder. All materials of the entire gas cylinder fixing device are made of high-strength steel, which not only ensures the use strength of the fixing device, but also effectively reduces the material occupation and achieves the purpose of light weight. At the same time, each gas cylinder in the CNG gas cylinder group can be installed independently or layered by lifting tools, which is a change from the prior art in which the rear CNG gas cylinder frame must be placed into the CNG gas cylinder from the side of the frame. , making the installation and fixing of CNG gas cylinders more convenient. At the same time, it also has unique advantages and effects such as simple structural design, few types of parts, light weight, convenient disassembly, good fixing reliability, strong fixed bearing capacity, convenient maintenance and use, integration, and generalization.

The above is only a description of the preferred implementation of the utility model, and does not limit the technical solution of the utility model thereto. Any known deformation made by those skilled in the art on the basis of the main technical concept of the utility model belongs to this utility model. The technical category to be protected by the utility model, the specific protection scope of the utility model is subject to the records in the claims.

Claims (10)

1. A CNG gas cylinder fixing device is characterized in that, comprising: gas cylinder shield (1), shield fixed frame, gas cylinder bracket (4), gas cylinder fastening belt (5) and gas cylinder support (7 ), the gas cylinder bracket (4) is fixed on the same height of the gas cylinder bracket (7) in two groups to form a gas cylinder fixing layer, and the CNG gas cylinder is installed on the gas cylinder bracket ( 4), and fastened by the gas cylinder fastening belt (5), the shield fixing frame is connected to the gas cylinder bracket (7) around the outer circumference of the gas cylinder bracket (7), and the gas cylinder shield The cover (1) is installed on the fixed frame of the cover. 2. CNG cylinder fixing device according to claim 1, is characterized in that, described gas cylinder support (7) comprises support base, front column (21) and rear column (26), and described front column (21) Comprising a left front column and a right front column, the rear column (26) includes a left rear column and a right rear column, and the left front column, the right front column, the left rear column and the right rear column are vertically fixed on the support base, and are in At the four apex positions of a rectangle, the gas cylinder support (7) is provided with several gas cylinder fixing layers along the height direction, and a gas cylinder bracket in each gas cylinder fixing layer is fixedly connected between the left front column and the left rear column Between, another cylinder bracket is fixedly connected between the right front column and the right rear column. 3. CNG cylinder fixing device according to claim 2, is characterized in that, also comprises connecting crossbeam (6), and described connecting crossbeam (6) is transversely connected between described left front column and right front column, and/ Or between the left rear upright and the right rear upright. 4. The CNG cylinder fixing device according to claim 3, characterized in that, at the setting position of each gas cylinder fixing layer, between the left front column and the right front column and between the left rear column and the right rear column Each is connected with a connecting beam (6). 5. CNG gas cylinder fixing device according to claim 2, is characterized in that, the support base of described gas cylinder support comprises support beam (22), support subbeam (23), support longitudinal beam (24) and lower support (25), the support sub-beam (23) includes two and is arranged parallel to each other along the longitudinal direction, and the support beam (22) includes two and is arranged on the support sub-beam (23) parallel to each other along the transverse direction Above, the support longitudinal beams (24) include two parallel to each other in the longitudinal direction and are arranged between the support beams (22), and the support longitudinal beams (24) are located between the support sub-beams (23) Above, the lower support (25) includes two, which are respectively arranged on the two support longitudinal beams (24), and the bottom ends of the left front column, the right front column, the left rear column and the right rear column are fixed on the on the sub-beam (23) of the bracket, and the inner sides of the left front column and the left rear column are respectively abutted against the two sides of one lower support, and the inner sides of the right front column and the right rear column are respectively abutted against the other lower support. sides. 6. The CNG cylinder fixing device according to claim 5, characterized in that, the lower support (25) is provided with an arc-shaped groove, and bolt guide brackets are arranged on both sides of the arc-shaped groove. 7. CNG gas cylinder fixing device according to claim 5, is characterized in that, described shield fixing frame comprises lower longitudinal beam (2), vertical beam (3), upper beam (8) and upper longitudinal beam (9 ), the lower longitudinal beam (2) includes two and is respectively connected between the left ends of the two bracket beams (22) and between the right ends of the two bracket beams (22), and the upper beam (8) includes There are two and are respectively arranged on the top of the front column and the top of the rear column, the upper longitudinal beam (9) includes several and is connected between two upper beams (8), the vertical beam ( 3) It includes several roots and is respectively connected between the end of the upper beam (8) and the end of the support beam (22). 8. CNG gas cylinder fixing device according to claim 7, is characterized in that, described gas cylinder shield (1) comprises left shield (51), top shield (52), right shield (53) ), the right rear shield (54), the rear middle shield (55) and the left rear shield (56), the left shield (51) is installed on the left side of the shield fixed frame, the right Rear shield (54), rear middle shield (55) and left rear shield (56) are installed on the rear side of described shield fixed frame, and described right shield (53) is installed on described shield fixed On the right side of the frame, the top shield (52) is installed on the top of the shield fixing frame, and is covered with the left shield (51), the right shield (53), the right rear shield (54), the rear middle shield (55) and the left rear shield (56). 9. according to the described CNG gas bottle fixing device of claim 1-8 any one, it is characterized in that, described gas bottle bracket (4) is formed by bracket plate (32), in bracket plate (32) Bolt holes are processed on both sides, a flanging structure is formed at the bottom of the bracket plate (32), an arc-shaped groove is opened inwardly at the top of the bracket plate (32), and an arc-shaped groove is arranged in the arc-shaped groove. The supporting plate (34) is provided with bolt guide brackets (33) on both sides of the arc groove. 10. The CNG gas cylinder fixing device according to claim 9, characterized in that, the gas cylinder fastening band (5) has a U-shaped structure, and two ends of the U-shape are formed with guide bolts that can pass through the bolts. The long bolt (41) of fine thread of support (33).