Cart for transporting and testing natural gas sampling steel cylinders

Abstract

The utility model relates to a cart for transporting and testing natural gas sampling steel cylinders, and belongs to the technical field of safe transportation and storage of the natural gas sampling steel cylinders. Comprising a trolley body frame, a plurality of fixed bearing clamping plates, a plurality of movable bearing clamping plates, a trolley handle, a plurality of boosting trundles, a plurality of fixed clamping grooves and a plurality of limiting clamping blocks. The fixed bearing clamping plates are fixedly installed on the trolley body frame, the movable bearing clamping plates are detachably installed on the trolley body frame, the multiple fixed bearing clamping plates correspond to the multiple movable bearing clamping plates in a one-to-one mode, the trolley handle is installed on the side wall of the trolley body frame, and the boosting trundles are installed at the bottom end of the trolley body frame. The fixed clamping grooves are formed in the fixed bearing clamping plate and the movable bearing clamping plate, the multiple fixed clamping grooves correspond to the multiple limiting clamping blocks in a one-to-one mode, and the natural gas sampling steel cylinders are flatly placed on the fixed bearing clamping plate and the movable bearing clamping plate and connected with the fixed clamping grooves and the limiting clamping blocks in a clamped mode. The natural gas sampling steel cylinder transportation device is beneficial to large-batch transportation of natural gas sampling steel cylinders with different heights and gas cylinder opening diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of safe transportation and storage of natural gas sampling cylinders, in particular to a cart used for transportation and testing of natural gas sampling cylinders. Background Art

[0002] With the development of the low-carbon energy industry and the growing demand for natural gas composition analysis, natural gas sampling cylinders are increasingly used in natural gas testing laboratories and other places as key tools for sample collection. Natural gas sampling cylinders at various natural gas stations and pipelines are usually transported over long distances to various natural gas testing laboratories. After arriving at the testing laboratory, testers need to test the natural gas in the sampling cylinders for multiple parameters such as high and low calorific value, composition, total sulfur content, and hydrogen sulfide content. However, the testing equipment is often distributed on different floors and in different rooms, which results in a large number of natural gas sampling cylinders that need to be moved repeatedly and frequently. The working pressure of natural gas sampling cylinders is generally 4-20MPa. Once they are not handled in a standardized manner or stored improperly, it is very easy to cause natural gas leakage, leading to serious safety accidents such as explosions, fires, and poisoning.

[0003] At present, in long-distance transportation, due to the lack of effective safety fixing devices, in order to buffer transportation collisions, natural gas sampling cylinders need to be strictly and tediously packed and boxed, which takes a long time and is inefficient. In places such as natural gas testing laboratories, testers mostly use two methods to carry natural gas sampling cylinders by hand or using a flatbed truck. The weight of natural gas sampling cylinders is usually in the range of 1KG-12KG. The number of tests in a batch of laboratories above a certain scale may be as many as hundreds of cylinders. The efficiency of manual handling is extremely low and the labor intensity is high. When using a flatbed truck for transportation, due to the lack of fixed structures and protective measures, natural gas sampling cylinders are prone to tipping, rolling or collision, causing impact explosions. In addition, during the inspection work, a large number of natural gas sampling cylinders are stored upright on the laboratory floor, and it is easy for personnel to knock over the sampling cylinders during activities.

[0004] Natural gas sampling cylinders for laboratories generally have common specifications such as 500mL, 1L, and 2L. The height, body diameter, and mouth diameter of gas cylinders of different specifications from different manufacturers are different. At the same time, using a single size cart cannot meet the actual needs of actual transportation and laboratory testing. It is necessary to prepare multiple gas cylinder transportation carts of different specifications, which not only wastes resources but also has low transportation and work efficiency. The existing transportation carts are all used for a single gas cylinder, and there is no cart suitable for transporting and testing multiple gas cylinder specifications. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cart for transporting and testing natural gas sampling steel cylinders, which is suitable for transporting natural gas sampling steel cylinders with different heights and cylinder mouth diameters in large quantities.

[0006] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a cart for transporting and testing natural gas sampling cylinders, comprising: a vehicle frame, a plurality of fixed supporting pallets, a plurality of movable supporting pallets, a cart handle, a plurality of booster casters, a plurality of fixed card slots and a plurality of limit card blocks; the fixed supporting pallet is fixedly mounted on the vehicle frame, the movable supporting pallet is detachably mounted on the vehicle frame, a plurality of the fixed supporting pallets and a plurality of the movable supporting pallets correspond one to one, the cart handle is mounted on the side wall of the vehicle frame, the booster casters are mounted on the bottom end of the vehicle frame, the fixed card slots are arranged on the fixed supporting pallet and the movable supporting pallet, a plurality of the fixed card slots and a plurality of the limit card blocks correspond one to one, the natural gas sampling cylinders are placed flat on the fixed supporting pallet and the movable supporting pallet, and are engaged with the fixed card slots and the limit card blocks.

[0007] The beneficial effects of the utility model are as follows: the fixed supporting card plate is fixedly mounted on the vehicle body frame, and the movable supporting card plate is detachably mounted on the vehicle body frame, which is conducive to adjusting the distance between the fixed supporting card plate and the movable supporting card plate, so that natural gas sampling cylinders with different heights can be fixed at both ends when lying flat; the fixed card slot cooperates with the limiting card block to facilitate placing both ends of the natural gas sampling cylinders with different cylinder mouth diameters firmly on the vehicle body frame, thereby realizing batch transportation and storage of natural gas sampling cylinders of various specifications, which has the advantages of reducing the intensity of manual handling, high safety during transportation, and good fixation during transportation and testing.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the vehicle body frame includes multiple supporting steel beams and multiple supporting columns, the supporting steel beams are rectangular ring structures, the supporting columns are rod-shaped structures, the multiple supporting steel beams are coaxially arranged up and down, and two adjacent supporting steel beams are connected by multiple supporting columns.

[0010] The beneficial effect of adopting the above further scheme is that the multiple supporting steel beams are coaxially arranged up and down, which is conducive to forming a multi-layer frame for placing natural gas sampling cylinders, thereby improving the transportation efficiency of natural gas sampling cylinders.

[0011] Furthermore, the supporting steel beam is formed by alternating two first supporting steel beams and two second supporting steel beams, and the plurality of fixed supporting clips are fixedly installed one by one correspondingly at the top ends of the plurality of first supporting steel beams on the same side.

[0012] The beneficial effect of adopting the above further scheme is: the fixed supporting card is fixedly installed on the top of the first supporting steel beam, which is conducive to fixing one end of the natural gas sampling cylinder, and cooperates with the mobile supporting card to adapt to and fix natural gas sampling cylinders of different heights.

[0013] Furthermore, a plurality of card plate positioning grooves are provided on the second supporting steel beams. In the supporting steel beams of each layer, the plurality of card plate positioning grooves provided on two of the second supporting steel beams correspond one to one, and the two ends of the movable supporting card plate are correspondingly engaged with the card plate positioning grooves provided on the two second supporting steel beams.

[0014] The beneficial effect of adopting the above further scheme is that the card plate positioning groove is connected with the movable supporting card plate, which is conducive to adjusting the distance between the fixed supporting card plate and the movable supporting card plate on each layer of supporting steel beam, so as to adapt to natural gas sampling cylinders of different heights.

[0015] Furthermore, the cart handle is installed on the side wall of the second supporting steel beam of the uppermost layer of the supporting steel beam.

[0016] The beneficial effect of adopting the above further solution is that the cart handle facilitates the experimental operator to transfer the vehicle frame and multiple natural gas sampling cylinders placed on the vehicle frame.

[0017] Furthermore, the fixed supporting card plate and the movable supporting card plate are both plate-like structures, and the fixed card slots are arc-shaped grooves arranged at the top of the fixed supporting card plate and the movable supporting card plate, and the multiple fixed card slots at the top of the fixed supporting card plate correspond one-to-one to the multiple fixed card slots at the top of the movable supporting card plate.

[0018] The beneficial effect of adopting the above further scheme is that the multiple fixed card slots on the top of the fixed supporting card plate correspond one-to-one with the multiple fixed card slots on the top of the movable supporting card plate, which is conducive to forming multiple groups of card positions for adapting to the placement of natural gas sampling cylinders.

[0019] Furthermore, two ends of the natural gas sampling cylinder are adapted to be arranged on the fixed card slot at the top of the fixed supporting card plate and the fixed card slot at the top of the movable supporting card plate in a one-to-one correspondence.

[0020] The beneficial effect of adopting the above further solution is that it is conducive to placing natural gas sampling cylinders with different cylinder mouth diameters on the vehicle body frame at the same time for transportation.

[0021] Furthermore, the limit card block is an arc-shaped shell structure, and the limit card block is detachably covered on the fixed card slot. Both ends of the limit card block are provided with card slots, and the card slots are adapted to be carded with the top of the fixed supporting card plate or the top of the movable supporting card plate.

[0022] The beneficial effect of adopting the above further scheme is that the limit card block is conducive to limiting the upper end of the natural gas sampling cylinder to a certain extent after the natural gas sampling cylinder is placed in the fixed card slot, thereby improving the stability of the natural gas sampling cylinder during transportation.

[0023] Furthermore, the fixing slot and the limiting block are made of HDPE, PVC or PP material to flexibly fix the natural gas sampling cylinder.

[0024] The beneficial effect of adopting the above further scheme is that it is conducive to achieving flexible wrapping and fixation of the natural gas sampling cylinder, and further improving the stability of the natural gas sampling cylinder during transportation.

[0025] Furthermore, the booster caster is a universal wheel with a braking function.

[0026] The beneficial effect of adopting the above further solution is that it is conducive to locking and fixing the vehicle body frame after the natural gas sampling cylinder is transported to the testing laboratory to avoid sliding and causing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an embodiment of the utility model when no natural gas sampling cylinder is placed;

[0028] Figure 2 A schematic diagram of the structure of the natural gas sampling cylinder provided in an embodiment of the utility model.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Car body frame; 2. Fixed supporting pallet; 3. Mobile supporting pallet; 4. Cart handle; 5. Pushing caster; 6. Fixed slot; 7. Limiting block; 11. Supporting steel beam frame; 12. Supporting column; 111. First supporting steel beam; 112. Second supporting steel beam; 113. Pallet positioning slot. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1 and Figure 2As shown, a cart for transporting and testing natural gas sampling cylinders comprises: a body frame 1, a plurality of fixed supporting pallets 2, a plurality of movable supporting pallets 3, a cart handle 4, a plurality of booster casters 5, a plurality of fixed card slots 6 and a plurality of limit card blocks 7; the fixed supporting pallet 2 is fixedly mounted on the body frame 1, the movable supporting pallet 3 is detachably mounted on the body frame 1, a plurality of the fixed supporting pallets 2 and a plurality of the movable supporting pallets 3 correspond one to one, the cart handle 4 is mounted on the side wall of the body frame 1, the booster casters 5 are mounted on the bottom end of the body frame 1, the fixed card slots 6 are arranged on the fixed supporting pallet 2 and the movable supporting pallet 3, a plurality of the fixed card slots 6 and a plurality of the limit card blocks 7 correspond one to one, and the natural gas sampling cylinder is placed flat on the fixed supporting pallet 2 and the movable supporting pallet 3, and is engaged with the fixed card slots 6 and the limit card blocks 7.

[0033] The beneficial effects of the utility model are as follows: the fixed supporting card plate is fixedly mounted on the vehicle body frame, and the movable supporting card plate is detachably mounted on the vehicle body frame, which is conducive to adjusting the distance between the fixed supporting card plate and the movable supporting card plate, so that natural gas sampling cylinders with different heights can be fixed at both ends when lying flat; the fixed card slot cooperates with the limiting card block to facilitate placing both ends of the natural gas sampling cylinders with different cylinder mouth diameters firmly on the vehicle body frame, thereby realizing batch transportation and storage of natural gas sampling cylinders of various specifications, which has the advantages of reducing the intensity of manual handling, high safety during transportation, and good fixation during transportation and testing.

[0034] Preferably, Figure 1 and Figure 2 As shown, the vehicle body frame 1 includes a plurality of supporting steel beams 11 and a plurality of supporting columns 12, wherein the supporting steel beams 11 are rectangular ring structures, and the supporting columns 12 are rod-shaped structures. The plurality of supporting steel beams 11 are coaxially arranged up and down, and two adjacent supporting steel beams 11 are connected by a plurality of supporting columns 12.

[0035] The beneficial effect of adopting the above preferred solution is that multiple supporting steel beams are coaxially arranged up and down, which is conducive to forming a multi-layer frame for placing natural gas sampling cylinders, thereby improving the transportation efficiency of natural gas sampling cylinders.

[0036] Preferably, Figure 1 and Figure 2 As shown, the supporting steel beam 11 is formed by two first supporting steel beams 111 and two second supporting steel beams 112 that are alternately wound, and the plurality of fixed supporting pallets 2 are fixedly installed one by one correspondingly at the top ends of the plurality of first supporting steel beams 111 on the same side.

[0037] It should be noted that: in the technical solution of the present utility model, a plurality of the fixed supporting plates 2 are fixedly installed one by one on the top of the first supporting steel beam 111 on the same side of the multi-layer supporting steel beam 11, such as Figure 1 and Figure 2 shown.

[0038] The beneficial effect of adopting the above-mentioned preferred scheme is that the fixed supporting card is fixedly installed on the top of the first supporting steel beam, which is conducive to fixing one end of the natural gas sampling cylinder, and cooperates with the movable supporting card to adapt to and fix natural gas sampling cylinders of different heights.

[0039] Preferably, Figure 1 and Figure 2 As shown, a plurality of card plate positioning grooves 113 are provided on the second supporting steel beam 112. In the supporting steel beam 11 of each layer, the plurality of card plate positioning grooves 113 provided on two of the second supporting steel beams 112 correspond one to one, and the two ends of the movable supporting card plate 3 correspond one to one to be clamped with the card plate positioning grooves 113 provided on the two second supporting steel beams 112.

[0040] Among them, it should be noted that: in the technical solution of the utility model, in each layer of the supporting steel beam 11, since the two second supporting steel beams 112 are arranged relatively to each other, the multiple card plate positioning grooves 113 arranged on the two second supporting steel beams 112 will form multiple groups of the card plate positioning grooves 113 for clamping with the movable supporting card plate 3, that is, the movable supporting card plate 3 moves in parallel when adjusting the distance between it and the fixed supporting card plate 2.

[0041] The beneficial effect of adopting the above-mentioned preferred scheme is that the card plate positioning groove is connected with the movable supporting card plate, which is conducive to adjusting the distance between the fixed supporting card plate and the movable supporting card plate on each layer of supporting steel beam, so as to adapt to natural gas sampling cylinders of different heights.

[0042] Preferably, Figure 1 and Figure 2 As shown, the cart handle 4 is installed on the side wall of the second supporting steel beam 112 of the uppermost layer of the supporting steel beam 11.

[0043] The beneficial effect of adopting the above preferred solution is that the cart handle facilitates the experimental operator to transfer the vehicle frame and multiple natural gas sampling cylinders placed on the vehicle frame.

[0044] Preferably, Figure 1 and Figure 2As shown, the fixed supporting card plate 2 and the movable supporting card plate 3 are both plate-like structures, and the fixed card slot 6 is an arc-shaped groove arranged at the top of the fixed supporting card plate 2 and the movable supporting card plate 3, and the multiple fixed card slots 6 at the top of the fixed supporting card plate 2 correspond one by one to the multiple fixed card slots 6 at the top of the movable supporting card plate 3.

[0045] It should be noted that: in the preferred embodiment of the present utility model, the fixing slot 6 is a semicircular groove.

[0046] The beneficial effect of adopting the above preferred scheme is that the multiple fixed card slots on the top of the fixed supporting card plate correspond one-to-one with the multiple fixed card slots on the top of the movable supporting card plate, which is conducive to forming multiple groups of card positions for adapting to the placement of natural gas sampling cylinders.

[0047] Preferably, Figure 1 and Figure 2 As shown, the two ends of the natural gas sampling cylinder are adapted to be arranged on the fixed card slot 6 at the top of the fixed supporting card plate 2 and the fixed card slot 6 at the top of the movable supporting card plate 3 in a one-to-one correspondence.

[0048] Among them, it should be noted that: in the preferred embodiment of the utility model, the fixed card slots 10 arranged on the fixed supporting card plate 2 and the movable supporting card plate 3 at different layers, or the fixed card slots 10 at different positions on the fixed supporting card plate 2 and the movable supporting card plate 3 at the same layer, can be designed into a variety of specifications and sizes to meet the needs of placing natural gas sampling cylinders with different cylinder mouth diameters on the vehicle body frame 1 at the same time.

[0049] The beneficial effect of adopting the above preferred solution is that it is conducive to placing natural gas sampling cylinders with different cylinder mouth diameters on the vehicle body frame at the same time for transportation.

[0050] Preferably, Figure 1 and Figure 2 As shown, the limit block 7 is an arc-shaped shell structure, and the limit block 7 is detachably covered on the fixed slot 6. Both ends of the limit block 7 are provided with snap-in grooves, and the snap-in grooves are adapted to snap-in with the top of the fixed supporting card plate 2 or the top of the movable supporting card plate 3.

[0051] It should be noted that: in a preferred embodiment of the present utility model, the limit block 7 is a semicircular shell structure, the fixed slot 6 and the limit block 7 are adapted to form an annular structure, and both ends of the natural gas sampling cylinder are adapted to be arranged in the annular structure formed by the fixed slot 6 and the limit block 7.

[0052] The beneficial effect of adopting the above-mentioned preferred scheme is that the limit card block is conducive to limiting the upper end of the natural gas sampling cylinder to a certain extent after the natural gas sampling cylinder is placed in the fixed card slot, thereby improving the stability of the natural gas sampling cylinder during transportation.

[0053] Preferably, the fixing slot 6 and the limiting block 7 are made of HDPE (high-density polyethylene) or PVC (polyvinyl chloride) or PP (polypropylene) material to flexibly fix the natural gas sampling cylinder.

[0054] The beneficial effect of adopting the above-mentioned preferred solution is that it is conducive to achieving flexible wrapping and fixation of the natural gas sampling cylinder, and further improving the stability of the natural gas sampling cylinder during transportation.

[0055] Preferably, the booster caster 5 is a universal wheel with a braking function.

[0056] The beneficial effect of adopting the above preferred solution is that it is conducive to locking and fixing the vehicle body frame after the natural gas sampling cylinder is transported to the testing laboratory to avoid sliding and causing safety hazards.

[0057] The working process of the utility model is described below by an embodiment:

[0058] like Figure 1 and Figure 2 As shown, during the batch transportation of natural gas sampling cylinders, and during the batch testing of natural gas sampling cylinders in testing laboratories and other places, a single-layer supporting steel beam frame 11 is taken as an example:

[0059] The inspector first selects the fixed card slot 6 and the limit card block 7 that are compatible with the diameter of the gas cylinder mouth of the natural gas sampling cylinder to be transported and tested, and places the fixed card slot 6 on the fixed supporting card plate 2 and the movable supporting card plate 3, so that the fixed card slot 6 on the fixed supporting card plate 2 corresponds to the fixed card slot 6 on the movable supporting card plate 3;

[0060] Then, according to the height of the natural gas sampling cylinder to be transported and tested, the movable supporting card plate 3 is clamped with the card plate positioning grooves 113 at different positions on the second supporting steel beam 112, so that the distance between the fixed supporting card plate 2 and the movable supporting card plate 3 is adapted to the distance between the two ends of the natural gas sampling cylinder.

[0061] Then, several natural gas sampling cylinders are placed flat in the fixed card slots 6 on the fixed supporting card plate 2 and the movable supporting card plate 3 in sequence, and the limit card block 7 is covered on the fixed card slot 6, and the limit card block 7 is engaged with the top of the fixed supporting card plate 2 and the movable supporting card plate 3, so as to form a flexible ring-shaped fixation for the two ends of the natural gas sampling cylinder to prevent the natural gas sampling cylinder from rolling or colliding;

[0062] Finally, the movement of the booster caster 5 is limited by the component with braking function on the booster caster 5, so that the cart can be parked stably, ensuring the safety of the natural gas sampling cylinder during the testing process. When the transportation end point is reached or a test is completed, the component with braking function on the booster caster 5 is opened, and the testing personnel hold the cart handle 4 and push the cart to conveniently realize the batch transportation of natural gas sampling cylinders of different specifications and the testing circulation between laboratories on each floor.

[0063] The utility model can realize the batch transportation and storage of natural gas sampling cylinders of various specifications. It has many advantages such as reducing the intensity of manual handling, being suitable for cylinders of various sizes, being able to place and transport a large number of cylinders, having high safety during transportation, and having good fixity during transportation and testing. It provides safety guarantee and support for the collection and transportation of natural gas samples, as well as the smooth development of the work of the natural gas testing laboratory.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cart for transporting and testing natural gas sampling cylinders, characterized in that: include: A vehicle body frame (1), a plurality of fixed supporting plates (2), a plurality of movable supporting plates (3), a cart handle (4), a plurality of booster casters (5), a plurality of fixed slots (6) and a plurality of limit blocks (7); The fixed supporting card plate (2) is fixedly mounted on the vehicle frame (1), and the movable supporting card plate (3) is detachably mounted on the vehicle frame (1). A plurality of the fixed supporting card plates (2) and a plurality of the movable supporting card plates (3) correspond one to one. The cart handle (4) is mounted on the side wall of the vehicle frame (1), and the booster caster (5) is mounted on the bottom end of the vehicle frame (1). The fixed card slot (6) is arranged on the fixed supporting card plate (2) and the movable supporting card plate (3). A plurality of the fixed card slots (6) and a plurality of the limiting card blocks (7) correspond one to one. The natural gas sampling cylinder is placed flat on the fixed supporting card plate (2) and the movable supporting card plate (3), and is engaged with the fixed card slot (6) and the limiting card block (7).

2. A cart for transporting and testing natural gas sampling cylinders according to claim 1, characterized in that: The vehicle body frame (1) comprises a plurality of supporting steel beams (11) and a plurality of supporting columns (12); the supporting steel beams (11) are rectangular ring structures, and the supporting columns (12) are rod-shaped structures; the plurality of supporting steel beams (11) are coaxially arranged up and down, and two adjacent supporting steel beams (11) are connected via the plurality of supporting columns (12).

3. A cart for transporting and testing natural gas sampling cylinders according to claim 2, characterized in that: The supporting steel beam (11) is formed by alternating two first supporting steel beams (111) and two second supporting steel beams (112), and the plurality of fixed supporting clips (2) are fixedly mounted one by one correspondingly on the top ends of the plurality of first supporting steel beams (111) on the same side.

4. A cart for transporting and testing natural gas sampling cylinders according to claim 3, characterized in that: A plurality of card plate positioning grooves (113) are arranged on the second supporting steel beam (112); in each layer of the supporting steel beam (11), the plurality of card plate positioning grooves (113) arranged on two of the second supporting steel beams (112) correspond one to one, and the two ends of the movable supporting card plate (3) are card-engaged with the card plate positioning grooves (113) arranged on the two second supporting steel beams (112) one to one.

5. A cart for transporting and testing natural gas sampling cylinders according to claim 3, characterized in that: The cart handle (4) is mounted on the side wall of the second supporting steel beam (112) of the uppermost layer of the supporting steel beam (11).

6. A cart for transporting and testing natural gas sampling cylinders according to claim 1, characterized in that: The fixed supporting card plate (2) and the movable supporting card plate (3) are both plate-shaped structures, and the fixed card slot (6) is an arc-shaped groove arranged at the top of the fixed supporting card plate (2) and the movable supporting card plate (3), and the multiple fixed card slots (6) at the top of the fixed supporting card plate (2) correspond one to one with the multiple fixed card slots (6) at the top of the movable supporting card plate (3).

7. A cart for transporting and testing natural gas sampling cylinders according to claim 5, characterized in that: The two ends of the natural gas sampling steel cylinder are adapted to be arranged in a one-to-one correspondence on the fixed card slot (6) at the top of the fixed supporting card plate (2) and the fixed card slot (6) at the top of the movable supporting card plate (3).

8. A cart for transporting and testing natural gas sampling cylinders according to claim 1, characterized in that: The limit card block (7) is an arc-shaped shell structure, and the limit card block (7) is detachably covered on the fixed card slot (6). Both ends of the limit card block (7) are provided with card slots, and the card slots are adapted to be carded with the top end of the fixed supporting card plate (2) or the top end of the movable supporting card plate (3).

9. A cart for transporting and testing natural gas sampling cylinders according to claim 1, characterized in that: The fixing slot (6) and the limiting block (7) are made of HDPE, PVC or PP materials, so as to flexibly fix the natural gas sampling cylinder.

10. A cart for transporting and testing natural gas sampling cylinders according to claim 1, characterized in that: The booster caster (5) is a universal wheel with a braking function.

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