A CNG heavy-duty truck gas supply device

Abstract

The present invention discloses a gas supply device for a CNG heavy-duty truck, which belongs to the technical field of gas supply devices and comprises a support frame and a plurality of gas cylinders, wherein the plurality of gas cylinders are located in the support frame and are connected in parallel to form a gas cylinder group through a high-pressure pipeline, two vertical rods are arranged on both sides of the support frame, a plurality of layer rods are fixed between the two opposite vertical rods, two layer rods at the same height form a group, and the interior of the support frame is divided into multiple layers, two support seats are movably arranged on the layer rods, a lower clamp is fixed on the support seat, an upper clamp is rotatably installed on the lower clamp, and a buffer layer is jointly arranged on the side where the lower clamp and the upper clamp are close to each other; the gas cylinder group composed of the plurality of gas cylinders of the present invention supplies gas to the heavy-duty truck, reduces the damage to the gas cylinders due to the rigid connection, avoids the loosening of the connection parts, and reduces the risk of leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of gas supply devices, and in particular to a gas supply device for a CNG heavy truck. Background Art

[0002] CNG (Compressed Natural Gas) can be obtained from the natural environment and can also be synthesized artificially. It is a fuel resource with a wide range of sources. Therefore, as oil resources continue to decrease, more and more cars are beginning to use this fuel with wider availability and convenience as an alternative fuel.

[0003] When CNG is used as a raw material for automobiles, the automobile must be equipped with CNG cylinders to store CNG gas, and then the cylinders are used to supply gas to the vehicle. For trucks, micro trucks and small trucks generally have one or two cylinders, while the cylinders used on heavy trucks have a small diameter, a thin tank body, and a large number, generally eight to twelve. They can be placed on the chassis of the vehicle or directly installed at the rear of the cab. No matter where they are installed, the current cylinders are rigidly connected and fixed by bolts, clamps, etc., and for areas with poor road conditions, the truck will cause severe vibrations during driving. The rigid connection will destroy the surface stress of the cylinder, reduce the service life of the cylinder, and also cause the connection parts to loosen, increasing the risk of leakage. Summary of the invention

[0004] The purpose of the present invention is to provide a gas supply device for CNG heavy trucks to solve the following technical problems: in areas with poor road conditions, severe vibrations may occur during the driving of the truck, and the rigid connection may damage the surface stress of the gas cylinder, reduce the service life of the gas cylinder, and also cause the connection parts to loosen, increasing the risk of leakage.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A gas supply device for a CNG heavy-duty truck comprises a support frame and a plurality of gas cylinders, wherein the plurality of gas cylinders are located in the support frame, and the plurality of gas cylinders are connected in parallel to form a gas cylinder group through a high-pressure pipeline, two vertical rods are arranged on both sides of the support frame, a plurality of layer rods are fixed between the two opposite vertical rods, and two layer rods at the same height form a group, so that the interior of the support frame is divided into multiple layers, and two support seats are movably arranged on the layer rods, a lower clamp is fixed on the support seat, an upper clamp is rotatably mounted on the lower clamp, and a buffer layer is arranged on the side where the lower clamp and the upper clamp are close to each other;

[0007] A first fixing block is provided at one end of the lower clamp and the upper clamp, and the two first fixing blocks are fixedly connected by bolts, and a second fixing block is provided on the first fixing block located below, and a movable rod is fixed on the second fixing block, and the movable rod is slidably connected to the vertical rod, and a first spring is mounted on the movable rod, and a limiting block is fixed at one end of the movable rod away from the second fixing block, and one end of the first spring is connected to the vertical rod, and the other end is connected to the limiting block, and a buffer mechanism is also provided between two layer rods located at the same height, and the buffer mechanism is located between the two support seats.

[0008] As a further solution of the present invention: two trapezoidal slide grooves are provided on the layer rod, a trapezoidal sliding block is fixed to the bottom of the support seat, and the trapezoidal sliding block is adapted to the trapezoidal slide grooves.

[0009] As a further solution of the present invention: the buffer mechanism includes a box body fixed on two layer rods, ventilation holes are opened on the side walls of the box body, two buffer rods are movably arranged on both side walls of the box body, a resistance block is arranged at one end of the buffer rod close to the support seat, the resistance block is fixedly connected to the support seat, two pipes are fixed in the box body, two pistons are arranged in the pipes, connecting rods are fixed on the sides away from each other of the two pistons, one end of the buffer rod located in the box body is connected to a flexible steel belt, a plurality of guide wheels are fixed in the box body, and one end of the flexible steel belt passes through the guide wheel and is fixedly connected to the connecting rod.

[0010] As a further solution of the present invention: the buffer mechanism also includes a support plate fixed between two layer rods, support rods are symmetrically arranged on the upper surface of the support plate, an arc plate is fixed on the top of the support rod, airbags are arranged on the side walls of the two arc plates that are close to each other, and a connecting tube is connected between the two airbags.

[0011] As a further solution of the present invention: the two pipes are connected to a branch pipe on the side away from each other, and the branch pipes are respectively connected to the air bags on both sides, and the two pistons are provided with a rubber cup on the side close to each other, a fixing ring is provided in the branch pipe, and a second spring is connected to the inner wall of the branch pipe, and a sealing ball is fixed to one end of the second spring.

[0012] As a further solution of the present invention: the diameters of the piston and the rubber cup are both smaller than the inner diameter of the pipe.

[0013] As a further solution of the present invention: a mounting rod is fixed inside the branch pipe, a push rod is movably provided on the mounting rod, a driven block with a trapezoidal cross-section is fixed at one end of the push rod, a third spring is sleeved on the push rod, one end of the third spring is connected to the mounting rod, and the other end is connected to the driven block, an active rod is fixed on the side where the two pistons are close to each other, and a wedge block is fixed at one end of the two active rods.

[0014] Beneficial effects of the present invention:

[0015] (1) The present invention divides the support frame into multiple layers by arranging layer rods, and two gas cylinders can be placed on each layer. The support seat is movably connected to the layer rods, and the upper clamp cooperates with the lower clamp to fix the gas cylinder, so that the gas cylinder and the support frame are flexibly connected. If bumps occur during the driving of the truck, the gas cylinder can move slightly with the support seat, and cooperate with the first spring and the buffer mechanism to offset the impact caused by the vibration, which not only reduces the damage to the gas cylinder caused by the rigid connection, but also the connecting pipeline moves with the gas cylinder, which also avoids the loosening of the connection part and reduces the risk of leakage;

[0016] (2) The present invention provides a box body, a buffer rod, a resistance block, a pipe and a piston, etc., and one end of the support seat uses a first spring for buffering, and the other end uses air pressure for buffering, so the buffering effect is better;

[0017] (3) The present invention provides structures such as support plates, support rods, curved plates and airbags. The curved plates and airbags are located on both sides of the gas cylinder, which play a certain anti-collision function. When the truck is bumpy, they can also assist in buffering and prevent the gas cylinder from moving too much.

[0018] (4) The present invention provides a mounting rod, a push rod, a follower block, a third spring and a wedge block. When the support seat moves, the movable rod, the flexible steel belt and the connecting rod drive the piston and the rubber cup to move, forming a structure similar to an "air pump". The gas is sent into the airbag through the branch pipe. The bumpier the road surface, the greater the movement of the support seat and the gas cylinder, and the faster the inflation speed, thereby accelerating the expansion of the airbag and limiting the gas cylinder, thereby preventing the gas cylinder from moving too much when the road surface is bumpy and causing additional damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the vertical rod, layer rod and gas cylinder of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the layer rod and the support seat of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the layer rod and the support seat of the present invention in a disassembled state;

[0024] Figure 5 It is a structural schematic diagram of the buffer mechanism of the present invention;

[0025] Figure 6It is a schematic diagram of the internal structure of the box of the present invention;

[0026] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0027] In the figure: 1, support frame; 2, gas cylinder; 3, vertical rod; 4, layer rod; 5, support seat; 6, lower clamp; 7, upper clamp; 8, buffer layer; 9, buffer mechanism; 901, box; 902, buffer rod; 903, resistance block; 904, support plate; 905, support rod; 906, arc plate; 907, airbag; 908, connecting pipe; 909, branch pipe; 910, pipeline; 911, piston; 912, rubber bowl; 913 , connecting rod; 914, guide wheel; 915, flexible steel belt; 916, active rod; 917, wedge block; 918, second spring; 919, sealing ball; 920, fixing ring; 921, mounting rod; 922, push rod; 923, driven block; 924, third spring; 10, first fixed block; 11, second fixed block; 12, movable rod; 13, limit block; 14, first spring; 15, trapezoidal slide groove; 16, trapezoidal slider.

[0028] The drawings are only used for illustrative purposes and are not to be construed as limitations of the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced in size, and do not represent the size and shape of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-4As shown, the present invention is a CNG heavy-duty truck gas supply device, comprising a support frame 1 and a plurality of gas cylinders 2, wherein the plurality of gas cylinders 2 are located in the support frame 1, and the plurality of gas cylinders 2 are connected in parallel to form a gas cylinder group through a high-pressure pipeline, and two vertical rods 3 are arranged on both sides of the support frame 1, and a plurality of layer rods 4 are fixed between the two opposite vertical rods 3, and two layer rods 4 located at the same height form a group, so that the interior of the support frame 1 is divided into multiple layers, and two support seats 5 are movably arranged on the layer rods 4, and a lower clamp 6 is fixed on the support seat 5, and an upper clamp is rotatably installed on the lower clamp 6 7, a buffer layer 8 is provided on the side where the lower clamp 6 and the upper clamp 7 are close to each other; a first fixing block 10 is provided at one end of each of the lower clamp 6 and the upper clamp 7, and the two first fixing blocks 10 are fixedly connected by bolts, and a second fixing block 11 is provided on the first fixing block 10 located below, and a movable rod 12 is fixed on the second fixing block 11, and the movable rod 12 is slidably connected to the vertical rod 3, and a first spring 14 is sleeved on the movable rod 12, and a limiting block 13 is fixed on one end of the movable rod 12 away from the second fixing block 11, and one end of the first spring 14 is connected to the vertical rod 3. The support frame 1 is divided into multiple layers by the layer rods 4, and two gas cylinders 2 can be placed on each layer. The support seat 5 can be movably connected to the layer rods 4, and the upper clamp 7 and the lower clamp 6 can cooperate to fix the gas cylinder 2, and a buffer layer 8 is provided. The buffer layer 8 is made of rubber. The rubber material makes the gas cylinder 2 and the supporting frame 1 flexibly connected. If bumps occur during the driving of the truck, the gas cylinder 2 can move slightly with the supporting seat 5, and cooperate with the first spring 14 and the buffer mechanism 9 to offset the impact caused by the vibration. This not only reduces the damage to the gas cylinder 2 caused by the rigid connection, but also the connecting pipeline moves with the gas cylinder 2, which also avoids the loosening of the connecting part and reduces the risk of leakage. In addition, the gas cylinders 2 on each layer are relatively independent and will not interfere with each other. Even if a layer or a gas cylinder 2 vibrates greatly, it will not affect other gas cylinders 2.

[0031] See also Figure 3 , Figure 5 and Figure 6The buffer mechanism 9 includes a box body 901 fixed on two layer rods 4, a ventilation hole is opened on the side wall of the box body 901, two buffer rods 902 are movably arranged on the two side walls of the box body 901, and a resistance block 903 is arranged at one end of the buffer rod 902 close to the support seat 5, and the resistance block 903 is fixedly connected to the support seat 5. Two pipes 910 are fixed in the box body 901, and two pistons 911 are arranged in the pipe 910. A connecting rod 913 is fixed on the side away from the two pistons 911. A flexible steel belt 915 is connected to one end of the buffer rod 902 located in the box body 901, and a plurality of guide wheels 914 are fixed in the box body 901, and one end of the flexible steel belt 915 passes through the guide wheel 914 and is fixedly connected to the connecting rod 913. The diameters of the piston 911 and the rubber bowl 912 are smaller than the diameters of the pipes. 910; when the support seat 5 and the gas cylinder 2 are affected by the vehicle and vibrate, one side is buffered by the first spring 14, and the other side is connected to the buffer mechanism 9. Since the support seat 5 will swing slightly left and right when vibration occurs, when the support seat 5 and the gas cylinder 2 move toward the side of the buffer mechanism 9, the buffer rod 902 will be driven to move, and the flexible steel belt 915 will push the piston 911 to move. The two pistons 911 in the same pipe 910 will approach each other, and the air pressure will hinder the movement of the support seat 5 and the gas cylinder 2 to buffer the vibration. As the vehicle gradually stabilizes, since the ventilation holes are opened on the box body 901, the diameters of the piston 911 and the rubber bowl 912 are smaller than the inner diameter of the pipe 910, the box body 901 and the pipe 910 will tend to balance with the external air pressure, and the support seat 5 and the gas cylinder 2 will also automatically reset.

[0032] See also Figure 3 and Figure 5 The buffer mechanism 9 also includes a support plate 904 fixed between the two layer rods 4, and support rods 905 are symmetrically arranged on the upper surface of the support plate 904. An arc plate 906 is fixed on the top of the support rod 905. Air bags 907 are arranged on the side walls adjacent to each other of the two arc plates 906, and a connecting pipe 908 is connected between the two air bags 907. In order to prevent the support seat 5 and the gas cylinder 2 from moving too much, the two arc plates 906 are located on both sides of the gas cylinder 2 to protect and limit the gas cylinder.

[0033] See also Figure 3 , Figure 6 and Figure 7, the two sides of the two pipes 910 that are far away from each other are connected with branch pipes 909, and the branch pipes 909 are respectively connected to the air bags 907 on both sides, and the sides of the two pistons 911 that are close to each other are provided with rubber cups 912, and a fixing ring 920 is provided in the branch pipe 909. The inner wall of the branch pipe 909 is connected with a second spring 918, and a sealing ball 919 is fixed to one end of the second spring 918; if encountering a road with extremely poor road conditions, the moving speed of the support seat 5 and the gas cylinder 2 will be accelerated, and the amplitude will also be increased, so that the moving speed of the piston 911 will also be accelerated, and the fixing ring, the second spring 918 and the sealing ball 919 constitute a one-way valve, which cooperates with the rubber bowl 912 to inflate the air bag 907, so that the air bag 907 expands and clamps the gas cylinder 2. Even on a road with extremely poor road conditions, the gas cylinder 2 can be well buffered.

[0034] See also Figure 7 , a mounting rod 921 is fixed inside the branch pipe 909, a push rod 922 is movably provided on the mounting rod 921, a follower block 923 with a trapezoidal cross section is fixed at one end of the push rod 922, a third spring 924 is sleeved on the push rod 922, one end of the third spring 924 is connected to the mounting rod 921, and the other end is connected to the follower block 923, active rods 916 are fixed on the side close to the two pistons 911, and a wedge block 917 is fixed at one end of the two active rods 916; in the initial state, the push rod 922 contacts the sealing ball 919, pushing the sealing ball 919 not to contact the fixing ring 920, so that the branch pipe 909 is in an open state, and a small movement Movement will not cause the expansion of the airbag 907. When the road condition is extremely bad, the movement speed of the support seat 5 and the gas cylinder 2 will increase, the movement amplitude of the two pistons 911 will also increase. When the two pistons 911 approach each other, the active rod 916 and the wedge block 917 will drive the driven block 923 to move, so that the push rod 922 will be separated from the sealing ball 919. Under the action of the second spring 918, the sealing ball 919 contacts the fixing ring 920, and the one-way valve works. At this time, the airbag 907 will be gradually inflated and expanded to protect the gas cylinder 2. As the vehicle stabilizes, the push rod 922 contacts the sealing ball 919 again, and the pressure can be relieved, and the airbag 907 automatically recovers.

[0035] The working principle of the present invention is as follows: the layer rod 4 divides the support frame 1 into multiple layers, and two gas cylinders 2 can be placed on each layer. The support seat 5 is movably connected to the layer rod 4, and the upper clamp 7 and the lower clamp 6 cooperate to fix the gas cylinder 2, and a buffer layer 8 is provided to make the gas cylinder 2 and the support frame 1 flexibly connected. If bumps occur during the driving of the truck, the gas cylinder 2 can move slightly with the support seat 5, one side is buffered by the first spring 14, and the other side is connected to the buffer mechanism 9. When vibration occurs, the support seat 5 will swing slightly left and right. When the support seat 5 and the gas cylinder 2 move to the side of the buffer mechanism 9, the buffer rod 902 will be driven to move, and the piston 911 will be pushed to move by the flexible steel belt 915. The two movable The plugs 911 will be close to each other, and the air pressure will hinder the movement of the support seat 5 and the gas cylinder 2, and cushion the vibration. As the vehicle gradually stabilizes, since the ventilation holes are provided on the box body 901, the diameters of the piston 911 and the rubber cup 912 are smaller than the inner diameter of the pipe 910, and the air pressure of the box body 901 and the pipe 910 and the outside will tend to be balanced. When the road surface is stable, the support seat 5 and the gas cylinder 2 will also automatically reset, which not only reduces the damage to the gas cylinder 2 caused by the rigid connection, but also the connecting pipeline moves with the gas cylinder 2, and the looseness of the connection part is avoided, reducing the risk of leakage. The gas cylinders 2 on each layer are relatively independent and will not interfere with each other. Even if a certain layer or a gas cylinder 2 has a large vibration amplitude, it will not affect other gas cylinders 2.

[0036] In the initial state, the push rod 922 contacts the sealing ball 919, pushing the sealing ball 919 out of contact with the fixing ring 920, so that the branch pipe 909 is in an open state, and at this time the wedge block 917 does not contact the driven block 923, and a small movement will not cause the expansion of the airbag 907. When the road condition is extremely bad, the moving speed of the support seat 5 and the gas cylinder 2 is accelerated and the movement amplitude is increased, and the movement amplitude of the two pistons 911 is also increased. When the two pistons 911 approach each other, the active rod 916 and the wedge block 9 17 will drive the driven block 923 to move, so that the push rod 922 will be separated from the sealing ball 919. Under the action of the second spring 918, the sealing ball 919 contacts the fixing ring 920, and the one-way valve works. At this time, the airbag 907 will be gradually inflated and expanded to clamp the gas cylinder 2. Even on the road with extremely poor road conditions, the gas cylinder 2 can be well buffered and protected. As the vehicle stabilizes, the push rod 922 contacts the sealing ball 919 again to release the pressure, and the airbag 907 automatically recovers.

[0037] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A CNG heavy-duty truck gas supply device, comprising a support frame (1) and a plurality of gas cylinders (2), wherein the plurality of gas cylinders (2) are located in the support frame (1), and the plurality of gas cylinders (2) are connected in parallel via a high-pressure pipeline to form a gas cylinder group, characterized in that: Two vertical rods (3) are arranged on both sides of the support frame (1), and a plurality of layer rods (4) are fixed between the two opposite vertical rods (3). Two layer rods (4) located at the same height form a group, and the interior of the support frame (1) is divided into multiple layers. Two support seats (5) are movably arranged on the layer rods (4), and a lower clamp (6) is fixed on the support seat (5). An upper clamp (7) is rotatably mounted on the lower clamp (6), and a buffer layer (8) is commonly arranged on the side where the lower clamp (6) and the upper clamp (7) are close to each other; A first fixing block (10) is provided at one end of the lower clamp (6) and the upper clamp (7), and the two first fixing blocks (10) are fixedly connected by bolts. A second fixing block (11) is provided on the lower first fixing block (10), and a movable rod (12) is fixed on the second fixing block (11). The movable rod (12) is slidably connected to the vertical rod (3), and a first spring (14) is sleeved on the movable rod (12). A limiting block (13) is fixed at one end of the movable rod (12) away from the second fixing block (11), and one end of the first spring (14) is connected to the vertical rod (3), and the other end is connected to the limiting block (13). A buffer mechanism (9) is also provided between the two layer rods (4) located at the same height, and the buffer mechanism (9) is located between the two support seats (5); The buffer mechanism (9) comprises a box body (901) fixed on two layer rods (4), a ventilation hole is provided on the side wall of the box body (901), two buffer rods (902) are movably provided on both side walls of the box body (901), a resistance block (903) is provided at one end of the buffer rod (902) close to the support seat (5), and the resistance block (903) is fixedly connected to the support seat (5), two pipes (910) are fixed in the box body (901), two pistons (911) are provided in the pipes (910), and connecting rods (913) are fixed on the sides away from each other of the two pistons (911), one end of the buffer rod (902) located in the box body (901) is connected to a flexible steel belt (915), a plurality of guide wheels (914) are fixed in the box body (901), and one end of the flexible steel belt (915) passes through the guide wheel (914) and is fixedly connected to the connecting rod (913); The buffer mechanism (9) further comprises a support plate (904) fixed between the two layer rods (4), support rods (905) are symmetrically arranged on the upper surface of the support plate (904), an arc-shaped plate (906) is fixed on the top of the support rod (905), air bags (907) are arranged on the adjacent side walls of the two arc-shaped plates (906), and a connecting pipe (908) is connected between the two air bags (907); The two pipes (910) are connected to a branch pipe (909) on the sides away from each other, and the branch pipes (909) are respectively connected to the air bags (907) on both sides. The two pistons (911) are provided with a rubber cup (912) on the sides close to each other. A fixing ring (920) is provided inside the branch pipe (909). A second spring (918) is connected to the inner wall of the branch pipe (909), and a sealing ball (919) is fixed to one end of the second spring (918). The second spring (918), the sealing ball (919) and the fixing ring (920) constitute a one-way valve from the pipe (910) to the branch pipe (909). A mounting rod (921) is fixed inside the branch pipe (909), a push rod (922) is movably provided on the mounting rod (921), a driven block (923) with a trapezoidal cross section is fixed to one end of the push rod (922), a third spring (924) is sleeved on the push rod (922), one end of the third spring (924) is connected to the mounting rod (921), and the other end is connected to the driven block (923), an active rod (916) is fixed to the side where the two pistons (911) are close to each other, a wedge block (917) is fixed to one end of the two active rods (916), and the wedge block (917) cooperates with the driven block (923); In the initial state, the push rod (922) contacts the sealing ball (919), pushing the sealing ball (919) so that it does not contact the fixing ring (920), so that the branch pipe (909) is in an open state. When the road condition is extremely bad, the movement amplitude of the two pistons (911) also increases. When the two pistons (911) approach each other, the active rod (916) and the wedge block (917) drive the driven block (923) to move, so that the push rod (922) is separated from the sealing ball (919). Under the action of the second spring (918), the sealing ball (919) contacts the fixing ring (920), and the one-way valve works.

2. A CNG heavy truck gas supply device according to claim 1, characterized in that: Two trapezoidal slide grooves (15) are provided on the layer rod (4), and a trapezoidal slide block (16) is fixed to the bottom of the support seat (5), and the trapezoidal slide block (16) is adapted to the trapezoidal slide groove (15).

3. A CNG heavy truck gas supply device according to claim 1, characterized in that: The diameters of the piston (911) and the rubber cup (912) are both smaller than the inner diameter of the pipe (910).

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