A hydrogen injection machine

Abstract

The present invention discloses a hydrogen injection machine, which includes a machine body and gun heads arranged on opposite sides of the machine body. The gun heads and the machine body are connected by air pipes. The gun head includes an outer gun body and an inner gun body. One end of the outer gun body is connected to the air pipe and is provided with a valve. The other end of the outer gun body is provided with a chute, and the inner gun body is slidably connected in the chute. The inner gun body is provided with a first air passage penetrating through both ends of the inner gun body. One end of the outer gun body close to the valve is provided with a second air passage communicated with the air pipe, and the valve is used to control the opening and closing of the second air passage. The present invention provides a hydrogen injection machine that can simultaneously inject hydrogen into hydrogen energy vehicles of two vehicle models, with high hydrogen injection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen injection, and in particular to a hydrogen injector. Background Art

[0002] The hydrogen injector is used to inject hydrogen in the hydrogen storage tank into a hydrogen energy vehicle. In order to adapt to different vehicle models, the existing hydrogen injector generally has two different types of gun heads on the body of the hydrogen injector. The outer diameter of one type of gun head is relatively small, which is suitable for the hydrogen injection port of a small vehicle, while the outer diameter of the other type of gun head is relatively large, which is suitable for the hydrogen injection port of a large vehicle. Therefore, the existing hydrogen injector can inject hydrogen into at most two vehicles (one large vehicle and one small vehicle) at the same time, and cannot inject hydrogen into two small vehicles or two large vehicles at the same time. When two small vehicles or two large vehicles need to be injected with hydrogen, they need to queue up for hydrogen injection, which reduces the hydrogen injection efficiency and increases the idle rate of the gun heads. Summary of the Invention

[0003] In order to solve the defect that the existing hydrogen injector cannot inject hydrogen into hydrogen energy vehicles of the same vehicle model at the same time, the present invention provides a hydrogen injector that can inject hydrogen into hydrogen energy vehicles of two vehicle models at the same time and has high hydrogen injection efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A hydrogen injector includes a body and gun heads arranged on opposite sides of the body. The gun heads are connected to the body through air pipes. Each gun head includes an outer gun body and an inner gun body. One end of the outer gun body is connected to the air pipe and is provided with a valve. The other end of the outer gun body is provided with a chute. The inner gun body is slidably connected in the chute. The inner gun body is provided with a first air passage penetrating through both ends of the inner gun body. One end of the outer gun body close to the valve is provided with a second air passage communicated with the air pipe. The valve is used to control the opening and closing of the second air passage.

[0006] With the above settings, hydrogen injection can be carried out for two small cars or two large cars simultaneously. Specifically, the gun head has two states, namely the first state and the second state. When the gun head is in the first state, the inner gun body is manually pulled out, and the inner gun body slides along the chute away from the valve, so that more than half of the inner gun body is exposed outside the outer gun body. When the gun head is in the second state, the inner gun body is manually inserted, and the inner gun body moves along the chute and approaches the bottom of the chute, so that the inner gun body is basically located inside the outer gun body. Among them, the outer diameter of the inner gun body is adapted to the hydrogen injection port of a small car, and the outer diameter of the outer gun body is adapted to the hydrogen injection port of a large car. When the gun head is in the first state, the gun head can insert the inner gun body into the hydrogen injection port of a small car, and then open the valve to inject hydrogen into the small car. The hydrogen passes through the gas pipe, the second air passage, the chute, and the first air passage and enters the hydrogen injection port. When the gun head is in the second state, the gun head can insert the outer gun body into the hydrogen injection port of a large car, and then open the valve to inject hydrogen into the large car. The hydrogen passes through the gas pipe, the second air passage, the chute, and the first air passage and enters the hydrogen injection port. In summary, by switching the state of the gun head, hydrogen injection can be carried out for a large car or a small car. Therefore, the present application can inject hydrogen into two hydrogen energy vehicles of different models simultaneously, or can also inject hydrogen into two hydrogen energy vehicles of the same model.

[0007] Furthermore, a first annular protrusion is fixedly connected to the outer side of the end of the outer gun body away from the valve, and a second annular protrusion is fixedly connected to the outer side of the end of the inner gun body away from the valve.

[0008] With the above settings, the stability of hydrogen injection can be increased. Specifically, when the inner gun body is inserted into the hydrogen injection port of a small car and connected, the second annular protrusion can prevent the inner gun body from being disengaged from the hydrogen injection port. When the outer gun body is inserted into the hydrogen injection port of a large car and connected, the first annular protrusion can prevent the outer gun body from being disengaged from the hydrogen injection port. The first annular protrusion and the second annular protrusion can refer to the corresponding designs of existing gun heads.

[0009] Furthermore, a flanging extending inward is provided at the end of the outer gun body away from the valve. The flanging is slidably connected to the inner gun body. A sealing convex edge is provided along the circumference of the end of the inner gun body close to the valve, and a first sealing ring is provided on the side of the flanging close to the sealing convex edge.

[0010] With the above settings, when the gun head is in the first state and hydrogen injection is carried out, there is good airtightness between the inner gun body and the outer gun body, that is, it is not easy to leak air between the inner gun body and the outer gun body. Specifically, when the gun head is in the first state and hydrogen injection is carried out, the hydrogen passes through the gas pipe, the second air passage, the chute, and the first air passage and enters the hydrogen energy vehicle. At this time, the air pressure in the chute is relatively large. Under the action of the air pressure, the sealing convex edge is pressed against the first sealing ring, thereby increasing the airtightness between the sealing convex edge and the first sealing ring, and preventing air leakage between the inner gun body and the outer gun body.

[0011] Further, side grooves are provided on opposite sides of the sliding groove. The extending direction of the side grooves is the same as that of the sliding groove. A limiting protrusion is fixedly connected to the outer side of the sealing convex edge. The limiting protrusion is slidably connected in the side groove. A first limiting groove for the limiting protrusion to slide into is provided at one end of the side groove away from the valve. A second limiting groove for the limiting protrusion to slide into is provided in the side groove. The second limiting groove is provided on the side of the first limiting groove close to the valve.

[0012] When the limiting protrusion is located in the first limiting groove, the sealing convex edge abuts against the first sealing ring.

[0013] Through the above settings, the inner gun body can be limited, so that the state of the gun head remains stable. Specifically, when the gun head is in the first state, the limiting protrusion is located in the first limiting groove, so that the gun head maintains the first state, and further prevents the inner gun body from moving relative to the outer gun body along the axis direction of the inner gun body during hydrogen injection. When the gun head is in the second state, the limiting protrusion is located in the second limiting groove, so that the gun head maintains the second state, and further prevents the inner gun body from moving relative to the outer gun body along the axis direction of the inner gun body, and further makes the gun head maintain the second state.

[0014] When the gun head is switched from the first state to the second state, first manually rotate the inner gun body around the axis of the inner gun body to make the limiting protrusion enter the side groove from the first limiting groove, and then manually move the inner gun body along the sliding groove towards the second limiting groove. When the limiting protrusion moves to the second limiting groove, manually rotate the inner gun body, the inner gun body rotates around the axis of the inner gun body, and the limiting protrusion enters the second limiting groove. At this point, the gun head is in the second state.

[0015] When the gun head is switched from the second state to the first state, first manually rotate the inner gun body around the axis of the inner gun body to make the limiting protrusion enter the side groove from the second limiting groove, and then manually move the inner gun body along the sliding groove towards the first limiting groove. When the limiting protrusion moves to the first limiting groove, manually rotate the inner gun body, the inner gun body rotates around the axis of the inner gun body, and the limiting protrusion enters the first limiting groove. At this point, the gun head is in the first state.

[0016] It should be particularly noted that when the gun head is in the second state and connected to the hydrogen injection port, after the valve is opened, hydrogen is input into the sliding groove. At this time, the pressure in the sliding groove suddenly increases. Under the action of the limiting protrusion, it can prevent the inner gun body from rushing forward, thereby preventing the pipeline in the hydrogen injection port of the hydrogen energy vehicle from being damaged by the inner gun body.

[0017] Further, a convex column is fixedly connected to one end of the inner gun body close to the valve. One end of the first air passage close to the valve penetrates to one end of the convex column close to the valve. A sealing groove adapted to the convex column is provided at the bottom of the chute. A second sealing ring is provided inside the sealing groove. The second air passage includes a main path communicated with the air pipe. The valve is arranged on the main path. A plurality of branch paths are formed by bifurcating one end of the main path away from the air pipe. One end of the branch path away from the main path is arranged at the bottom of the chute and around the sealing groove. A third limiting groove for sliding the limiting protrusion into is provided at one end of the side groove close to the valve. The second limiting groove is arranged between the first limiting groove and the third limiting groove.

[0018] When the limiting protrusion is arranged in the third limiting groove, the inner gun body abuts against the bottom of the chute, and the inner gun body covers the air outlet of the branch path, and the convex column is arranged in the sealing groove.

[0019] Through the above settings, when hydrogen is not injected, the inner gun body is used to block the second air passage to prevent hydrogen leakage caused by the reduced airtightness of the valve, thereby increasing safety. Specifically, after the hydrogen injection is completed, the inner gun body is manually rotated. The inner gun body rotates around the axis of the inner gun body, so that the limiting protrusion enters the side groove, and the inner gun body moves along the chute towards the bottom of the chute until the inner gun body abuts against the bottom of the chute. At this time, the limiting protrusion corresponds to the position of the third limiting groove. The inner gun body is manually rotated. The inner gun body rotates around the axis of the inner gun body, and the limiting protrusion enters the third limiting groove, thereby preventing the inner gun body from moving relative to the outer gun body along the axis of the inner gun body, so that the inner gun body always covers the air outlet of the branch path, thereby preventing the hydrogen in the second air passage from overflowing. In addition, the convex column is inserted into the sealing groove. Under the action of the second sealing ring, the airtightness between the convex column and the sealing groove is very good. Therefore, when hydrogen overflows from the air outlet of the branch path, the overflowing hydrogen will be kept in the chute and will not overflow to the atmosphere through the first air passage, ensuring the safety of the hydrogen filling station.

[0020] Further, a first chamfer for facilitating the insertion of the convex column into the sealing groove is circumferentially arranged at one end of the convex column close to the sealing groove.

[0021] Further, a first accommodating groove is arranged on one side of the first limiting groove close to the valve. A first bead is arranged at the mouth of the first accommodating groove. The first bead is connected to the bottom of the first accommodating groove through a first spring. At least part of the first bead is arranged in the first limiting groove.

[0022] When the limiting protrusion abuts against the bottom of the first limiting groove, the first bead abuts against one side of the limiting protrusion close to the mouth of the first limiting groove.

[0023] With the above settings, it is possible to prevent the limit protrusion from being more stable within the first limit groove. Specifically, when the limit protrusion enters the first limit groove, the limit protrusion pushes the first bead, and the first spring shortens. When the limit protrusion moves to the bottom of the first limit groove, the first spring elongates, and the first bead and the limit protrusion abut against the side closer to the notch of the first limit groove, thereby preventing the limit protrusion from easily disengaging from the bottom of the first limit groove.

[0024] When the limit protrusion leaves the first limit groove, rotate the inner gun body. The inner gun body drives the limit protrusion to move towards the notch of the first limit groove. Due to the presence of the first bead, the resistance to the rotation of the inner gun body is relatively large. The limit protrusion squeezes the first bead, and the first bead squeezes the first spring, causing the first spring to shorten. When the limit protrusion passes the first bead, the first spring elongates again and causes the first bead to partially enter the first limit groove.

[0025] Furthermore, a second receiving groove is provided on the side of the second limit groove close to the valve. A second bead is provided at the notch of the second receiving groove. The second bead is connected to the bottom of the second receiving groove by a second spring, and at least part of the second bead is provided within the second limit groove.

[0026] When the limit protrusion abuts against the bottom of the second limit groove, the second bead abuts against the side of the limit protrusion closer to the notch of the second limit groove.

[0027] With the above settings, it is possible to prevent the limit protrusion from being more stable within the second limit groove. Specifically, when the limit protrusion enters the second limit groove, the limit protrusion pushes the second bead, and the second spring shortens. When the limit protrusion moves to the bottom of the second limit groove, the second spring elongates, and the second bead and the limit protrusion abut against the side closer to the notch of the second limit groove, thereby preventing the limit protrusion from easily disengaging from the bottom of the second limit groove.

[0028] When the limit protrusion leaves the second limit groove, rotate the inner gun body. The inner gun body drives the limit protrusion to move towards the notch of the second limit groove. Due to the presence of the second bead, the resistance to the rotation of the inner gun body is relatively large. The limit protrusion squeezes the second bead, and the second bead squeezes the second spring, causing the second spring to shorten. When the limit protrusion passes the second bead, the second spring elongates again and causes the second bead to partially enter the second limit groove.

[0029] Furthermore, a third receiving groove is provided on the side of the third limit groove close to the valve. A third bead is provided at the notch of the third receiving groove. The third bead is connected to the bottom of the third receiving groove by a third spring, and at least part of the third bead is provided within the third limit groove.

[0030] When the limit protrusion abuts against the bottom of the third limit groove, the third bead abuts against the side of the limit protrusion closer to the notch of the third limit groove.

[0031] Through the above settings, the limit protrusion can be made more stable in the third limit groove. Specifically, when the limit protrusion enters the third limit groove, the limit protrusion pushes the third bead, and the third spring shortens. When the limit protrusion moves to the bottom of the third limit groove, the third spring elongates, and the third bead and the limit protrusion abut against the side closer to the notch of the third limit groove, thereby preventing the limit protrusion from easily disengaging from the bottom of the third limit groove.

[0032] When the limit protrusion leaves the third limit groove, rotate the inner gun body. The inner gun body drives the limit protrusion to move towards the notch of the third limit groove. Due to the presence of the third bead, the resistance to the rotation of the inner gun body is relatively large. The limit protrusion presses the third bead, and the third bead presses the third spring, causing the third spring to shorten. When the limit protrusion passes the third bead, the third spring elongates again and makes the third bead partially enter the third limit groove.

[0033] Furthermore, a fourth receiving groove extending towards the second limit groove is provided at the bottom of the third limit groove. The fourth receiving groove is used for the limit protrusion to slide into. A push plate is slidably connected in the fourth receiving groove. The push plate is arranged at the notch of the fourth receiving groove. The push plate and the bottom of the fourth receiving groove are connected by a fourth spring. A partition block is formed between the side groove and the fourth receiving groove. A second chamfer is provided on the side of the partition block close to the third limit groove. The second chamfer facilitates the limit protrusion to slide from the third limit groove into the fourth receiving groove, and the second chamfer also facilitates the limit protrusion to move from the bottom of the third limit groove towards the notch of the third limit groove.

[0034] Through the above settings, it can remind personnel of hydrogen leakage. Specifically, after hydrogen injection is completed, the limit protrusion is located in the third limit groove and abuts against the bottom of the third limit groove. At this time, the push plate abuts against the limit protrusion.

[0035] In the first case, when the airtightness of the valve is intact, when hydrogen injection is required, manually rotate the inner gun body. The inner gun body drives the limit protrusion to move towards the notch of the third limit groove and enter the side groove. Then, manually drive the inner gun body to move along the sliding groove, so that the limit protrusion moves along the side groove to the first limit groove or the second limit groove, and further makes the limit protrusion enter the first limit groove or the second limit groove, and further makes the gun head enter the first state or the second state. The setting of the second chamfer can prevent the limit protrusion from getting stuck with the partition block when moving towards the notch of the third limit groove.

[0036] In the second case, when air leakage occurs in the second air duct due to the reduced airtightness of the valve, hydrogen overflows from the air outlet of the branch and enters the chute. The hydrogen entering the chute will not overflow into the atmosphere under the action of the first sealing ring and the second sealing ring, thus ensuring the safety of the hydrogen injection station. In addition, under the action of the air flow at the air outlet of the branch, hydrogen pushes the inner gun body, and the limit protrusion pushes the push plate and compresses the fourth spring. In addition, as the air pressure in the chute increases, it also helps the inner gun body move outward to the outside of the outer gun body, that is, there is an air pressure difference between the upper and lower ends of the inner gun body. Under the action of the air pressure difference, the inner gun body will move upward and push the push plate upward through the limit protrusion. At this time, when hydrogen injection is required, the limit protrusion is blocked by the partition block, and the operator cannot rotate the inner gun body, thus reminding the operator that the airtightness of the valve has decreased and the gun head needs to be repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the embodiment.

[0038] Figure 2 Schematic diagram of the gun head.

[0039] Figure 3 is Figure 2 A-A cross-sectional view of

[0040] Figure 4 is Figure 2 B-B cross-sectional view of

[0041] Figure 5 is Figure 2 C-C cross-sectional view of

[0042] Figure 6 is Figure 2 E-E cross-sectional view of

[0043] Figure 7 Schematic diagram of the gun head in the first state.

[0044] Figure 8 Schematic diagram of the limit protrusion entering the first limit groove.

[0045] Figure 9 Schematic diagram of the gun head in the second state.

[0046] Figure 10 Schematic diagram of the limit protrusion entering the second limit groove.

[0047] Figure 11 Schematic diagram of the inner gun body abutting against the bottom of the chute.

[0048] Figure 12 Schematic diagram of the limit protrusion entering the third limit groove.

[0049] Figure 13Schematic diagram of the gun head when hydrogen leaks.

[0050] Figure 14 Schematic diagram of the limit protrusion pushing the push plate. Specific implementation mode

[0051] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the drawings.

[0052] See Figures 1 to 14 , a hydrogen injection machine, including a machine body 11 and gun heads 12 arranged on opposite sides of the machine body 11. The gun heads 12 and the machine body 11 are connected by an air pipe 13. The gun head 12 includes an outer gun body 121 and an inner gun body 123. One end of the outer gun body 121 is connected to the air pipe 13 and is provided with a valve 122. The other end of the outer gun body 121 is provided with a chute 1211. The inner gun body 123 is slidably connected in the chute 1211. The inner gun body 123 is provided with a first air passage 1231 penetrating through both ends of the inner gun body 123. One end of the outer gun body 121 near the valve 122 is provided with a second air passage 1212 communicating with the air pipe 13. The valve 122 is used to control the opening and closing of the second air passage 1212.

[0053] Through the above settings, hydrogen can be injected into two small cars or two large cars at the same time. Specifically, the gun head 12 has two states, namely the first state and the second state. When the gun head 12 is in the first state, manually pull out the inner gun body 123, and the inner gun body 123 slides along the chute 1211 to the side away from the valve 122, so that more than half of the inner gun body 123 is exposed outside the outer gun body 121. See Figure 7 . When the gun head 12 is in the second state, manually insert the inner gun body 123, and the inner gun body 123 moves along the chute 1211 and approaches the bottom of the chute 1211, so that the inner gun body 123 is basically located inside the outer gun body 121. See Figure 9 . Among them, the outer diameter of the inner gun body 123 is adapted to the hydrogen injection port of a small car, and the outer diameter of the outer gun body 121 is adapted to the hydrogen injection port of a large car. When the gun head 12 is in the first state, the gun head 12 can insert the inner gun body 123 into the hydrogen injection port of the small car, and then open the valve 122 to inject hydrogen into the small car. Hydrogen enters the hydrogen injection port through the air pipe, the second air passage, the chute, and the first air passage. When the gun head 12 is in the second state, the gun head 12 can insert the outer gun body 121 into the hydrogen injection port of the large car, and then open the valve 122 to inject hydrogen into the large car. Hydrogen enters the hydrogen injection port through the air pipe, the second air passage, the chute, and the first air passage. In summary, by switching the state of the gun head 12, hydrogen can be injected into a large car or a small car. Therefore, the present application can inject hydrogen into two hydrogen energy vehicles of different models at the same time, or can also inject hydrogen into two hydrogen energy vehicles of the same model.

[0054] As an implementation, a first annular protrusion 1213 is fixedly connected to the outer side of one end of the outer gun body 121 away from the valve 122, and a second annular protrusion 1232 is fixedly connected to the outer side of one end of the inner gun body 123 away from the valve 122.

[0055] Through the above settings, the stability of hydrogen injection can be increased. Specifically, when the inner gun body 123 is inserted into and connected to the hydrogen injection port of a small vehicle, the second annular protrusion 1232 can prevent the inner gun body 123 from disengaging from the hydrogen injection port. When the outer gun body 121 is inserted into and connected to the hydrogen injection port of a large vehicle, the first annular protrusion 1213 can prevent the outer gun body 121 from disengaging from the hydrogen injection port. The first annular protrusion 1213 and the second annular protrusion 1232 can refer to the corresponding designs of the existing gun head 12.

[0056] As an implementation, a flanging 1214 extending inward is provided at one end of the outer gun body 121 away from the valve 122. The flanging 1214 is slidably connected to the inner gun body 123. A sealing convex edge 1233 is provided along the circumference of one end of the inner gun body 123 close to the valve 122, and a first sealing ring 12141 is provided on one side of the flanging 1214 close to the sealing convex edge 1233.

[0057] Through the above settings, when the gun head 12 is in the first state and hydrogen injection is carried out, there is good airtightness between the inner gun body 123 and the outer gun body 121, that is, it is not easy for air to leak between the inner gun body 123 and the outer gun body 121. Specifically, refer to Figure 7 When the gun head 12 is in the first state and hydrogen injection is carried out, hydrogen enters the hydrogen energy vehicle through the air pipe 13, the second air passage 1212, the chute 1211, and the first air passage 1231. At this time, the air pressure in the chute 1211 is relatively high. Under the action of the air pressure, the sealing convex edge 1233 is pressed against the first sealing ring 12141, thereby increasing the airtightness between the sealing convex edge 1233 and the first sealing ring 12141, and preventing air leakage between the inner gun body 123 and the outer gun body 121.

[0058] As an implementation, side grooves 12111 are provided on opposite sides of the chute 1211. The extending direction of the side grooves 12111 is the same as that of the chute 1211. A limiting protrusion 12331 is fixedly connected to the outer side of the sealing convex edge 1233. The limiting protrusion 12331 is slidably connected in the side grooves 12111. A first limiting groove 12112 for sliding the limiting protrusion 12331 into is provided at one end of the side grooves 12111 away from the valve 122. A second limiting groove 12113 for sliding the limiting protrusion 12331 into is provided in the side grooves 12111. The second limiting groove 12113 is provided on the side of the first limiting groove 12112 close to the valve 122.

[0059] When the limiting protrusion 12331 is located in the first limiting groove 12112, the sealing convex edge 1233 abuts against the first sealing ring 12141.

[0060] Through the above settings, the inner gun body 123 can be limited, so that the state of the gun head 12 is kept stable. Specifically, when the gun head 12 is in the first state, the limiting protrusion 12331 is located in the first limiting groove 12112, so that the gun head 12 maintains the first state, and further prevents the inner gun body 123 from moving relative to the outer gun body 121 along the axial direction of the inner gun body 123 during hydrogen injection. When the gun head 12 is in the second state, the limiting protrusion 12331 is located in the second limiting groove 12113, so that the gun head 12 is kept in the second state, and further prevents the inner gun body 123 from moving relative to the outer gun body 121 along the axial direction of the inner gun body 123, and further keeps the gun head 12 in the second state.

[0061] When the gun head 12 is switched from the first state to the second state, first manually rotate the inner gun body 123 around the axis of the inner gun body 123, so that the limiting protrusion 12331 enters the side groove 12111 from the first limiting groove 12112, and then manually move the inner gun body 123 along the sliding groove 1211 towards the second limiting groove 12113. When the limiting protrusion 12331 moves to the second limiting groove 12113, manually rotate the inner gun body 123, the inner gun body 123 rotates around the axis of the inner gun body 123, and the limiting protrusion 12331 enters the second limiting groove 12113. At this point, the gun head 12 is in the second state, see Figure 9 and Figure 10 .

[0062] When the gun head 12 is switched from the second state to the first state, first manually rotate the inner gun body 123 around the axis of the inner gun body 123, so that the limiting protrusion 12331 enters the side groove 12111 from the second limiting groove 12113, and then manually move the inner gun body 123 along the sliding groove 1211 towards the first limiting groove 12112. When the limiting protrusion 12331 moves to the first limiting groove 12112, manually rotate the inner gun body 123, the inner gun body 123 rotates around the axis of the inner gun body 123, and the limiting protrusion 12331 enters the first limiting groove 12112. At this point, the gun head 12 is in the first state, see Figure 7 and Figure 8 .

[0063] It should be noted that when the gun head 12 is in the second state and connected to the hydrogen injection port, after the valve 122 is opened, hydrogen is input into the sliding groove 1211. At this time, the pressure in the sliding groove 1211 suddenly increases. Under the action of the limiting protrusion 12331, the inner gun body 123 can be prevented from rushing forward, so that the pipeline in the hydrogen injection port of the hydrogen energy vehicle can be prevented from being damaged by the inner gun body 123.

[0064] As an implementation, a convex column 1234 is fixedly connected to one end of the inner gun body 123 close to the valve 122. One end of the first air passage 1231 close to the valve 122 penetrates to one end of the convex column 1234 close to the valve 122. A sealing groove 1215 adapted to the convex column 1234 is provided at the bottom of the chute 1211. A second sealing ring 12151 is provided inside the sealing groove 1215. The second air passage 1212 includes a main path 12121 communicating with the air pipe 13. The valve 122 is provided on the main path 12121. A plurality of branch paths 12122 are formed by bifurcating one end of the main path 12121 away from the air pipe 13. One end of the branch path 12122 away from the main path 12121 is provided at the bottom of the chute 1211 and is provided around the sealing groove 1215. A third limiting groove 12114 for sliding into the limiting projection 12331 is provided at one end of the side groove 12111 close to the valve 122. The second limiting groove 12113 is provided between the first limiting groove 12112 and the third limiting groove 12114.

[0065] When the limiting projection 12331 is arranged in the third limiting groove 12114, the inner gun body 123 abuts against the bottom of the chute 1211, and the inner gun body 123 covers the air outlet of the branch path 12122, and the convex column 1234 is arranged in the sealing groove 1215.

[0066] Through the above settings, when hydrogen is not injected, the inner gun body 123 is used to block the second air passage 1212 to prevent hydrogen leakage caused by the reduction of the airtightness of the valve 122, thereby increasing safety. Specifically, after the hydrogen injection is completed, the inner gun body 123 is manually rotated. The inner gun body 123 rotates around the axis of the inner gun body 123, so that the limiting projection 12331 enters the side groove 12111, and the inner gun body 123 moves along the chute 1211 towards the bottom of the chute 1211 until the inner gun body 123 abuts against the bottom of the chute 1211. At this time, the limiting projection 12331 corresponds to the position of the third limiting groove 12114. The inner gun body 123 is manually rotated. The inner gun body 123 rotates around the axis of the inner gun body 123, and the limiting projection 12331 enters the third limiting groove 12114, thereby preventing the inner gun body 123 from moving along the axis of the inner gun body 123 relative to the outer gun body 121, so that the inner gun body 123 always covers the air outlet of the branch path 12122, thereby preventing the hydrogen in the second air passage 1212 from overflowing. In addition, the convex column 1234 is inserted into the sealing groove 1215. Under the action of the second sealing ring 12151, the airtightness between the convex column 1234 and the sealing groove 1215 is very good. Therefore, when hydrogen overflows from the air outlet of the branch path 12122, the overflowing hydrogen will be kept in the chute 1211 and will not overflow to the atmosphere through the first air passage 1231, ensuring the safety of the hydrogen filling station. See Figure 11 .

[0067] As an implementation manner, a first chamfer 12152 facilitating the insertion of the convex post 1234 into the sealing groove 1215 is circumferentially provided at one end of the convex post 1234 close to the sealing groove 1215.

[0068] As an implementation manner, a first receiving groove 1216 is provided on one side of the first limiting groove 12112 close to the valve 122. A first bead 12161 is provided at the notch of the first receiving groove 1216. The first bead 12161 and the bottom of the first receiving groove 1216 are connected by a first spring 12162. At least a part of the first bead 12161 is arranged in the first limiting groove 12112.

[0069] When the limiting protrusion 12331 abuts against the bottom of the first limiting groove 12112, the first bead 12161 abuts against one side of the limiting protrusion 12331 close to the notch of the first limiting groove 12112.

[0070] Through the above arrangement, the limiting protrusion 12331 can be prevented from being more stable in the first limiting groove 12112. Specifically, when the limiting protrusion 12331 enters the first limiting groove 12112, the limiting protrusion 12331 pushes the first bead 12161, and the first spring 12162 shortens. When the limiting protrusion 12331 moves to the bottom of the first limiting groove 12112, the first spring 12162 elongates, and the first bead 12161 abuts against one side of the limiting protrusion 12331 close to the notch of the first limiting groove 12112, thereby preventing the limiting protrusion 12331 from easily disengaging from the bottom of the first limiting groove 12112. See Figure 8 。

[0071] When the limiting protrusion 12331 leaves the first limiting groove 12112, the inner gun body 123 is rotated. The inner gun body 123 drives the limiting protrusion 12331 to move towards the notch of the first limiting groove 12112. Due to the existence of the first bead 12161, the resistance of the inner gun body 123 during rotation is relatively large. The limiting protrusion 12331 presses the first bead 12161, and the first bead 12161 presses the first spring 12162, causing the first spring 12162 to shorten. When the limiting protrusion 12331 passes by the first bead 12161, the first spring 12162 elongates again and makes the first bead 12161 partially enter the first limiting groove 12112.

[0072] As an implementation manner, a second receiving groove 1217 is provided on one side of the second limiting groove 12113 close to the valve 122. A second bead 12171 is provided at the notch of the second receiving groove 1217. The second bead 12171 and the bottom of the second receiving groove 1217 are connected by a second spring 12172. At least a part of the second bead 12171 is arranged in the second limiting groove 12113.

[0073] When the limiting protrusion 12331 abuts against the bottom of the second limiting groove 12113, the second bead 12171 abuts against the side of the limiting protrusion 12331 close to the notch of the second limiting groove 12113.

[0074] With the above arrangement, the limiting protrusion 12331 can be prevented from being more stable in the second limiting groove 12113. Specifically, when the limiting protrusion 12331 enters the second limiting groove 12113, the limiting protrusion 12331 pushes the second bead 12171, and the second spring 12172 shortens. When the limiting protrusion 12331 moves to the bottom of the second limiting groove 12113, the second spring 12172 elongates, and the second bead 12171 abuts against the side of the limiting protrusion 12331 close to the notch of the second limiting groove 12113, thereby preventing the limiting protrusion 12331 from easily disengaging from the bottom of the second limiting groove 12113. See Figure 10 .

[0075] When the limiting protrusion 12331 leaves the second limiting groove 12113, the inner gun body 123 is rotated. The inner gun body 123 drives the limiting protrusion 12331 to move towards the notch of the second limiting groove 12113. Due to the presence of the second bead 12171, the resistance to the rotation of the inner gun body 123 is relatively large. The limiting protrusion 12331 presses the second bead 12171, and the second bead 12171 presses the second spring 12172, causing the second spring 12172 to shorten. When the limiting protrusion 12331 passes the second bead 12171, the second spring 12172 elongates again and causes the second bead 12171 to partially enter the second limiting groove 12113.

[0076] As a implementation manner, a third receiving groove 1218 is provided on the side of the third limiting groove 12114 close to the valve 122. A third bead 12181 is provided at the notch of the third receiving groove 1218. The third bead 12181 is connected to the bottom of the third receiving groove 1218 through a third spring 12182. The third bead 12181 is at least partially disposed in the third limiting groove 12114.

[0077] When the limiting protrusion 12331 abuts against the bottom of the third limiting groove 12114, the third bead 12181 abuts against the side of the limiting protrusion 12331 close to the notch of the third limiting groove 12114.

[0078] Through the above settings, the limit protrusion 12331 can be made more stable in the third limit groove 12114. Specifically, when the limit protrusion 12331 enters the third limit groove 12114, the limit protrusion 12331 pushes the third bead 12181, and the third spring 12182 shortens. When the limit protrusion 12331 moves to the bottom of the third limit groove 12114, the third spring 12182 elongates, and the third bead 12181 and the side of the limit protrusion 12331 close to the notch of the third limit groove 12114 are in contact, thereby preventing the limit protrusion 12331 from easily disengaging from the bottom of the third limit groove 12114. See Figure 12 。

[0079] When the limit protrusion 12331 leaves the third limit groove 12114, the inner gun body 123 is rotated. The inner gun body 123 drives the limit protrusion 12331 to move towards the notch of the third limit groove 12114. Due to the presence of the third bead 12181, the resistance to the rotation of the inner gun body 123 is relatively large. The limit protrusion 12331 presses the third bead 12181, and the third bead 12181 presses the third spring 12182, causing the third spring 12182 to shorten. When the limit protrusion 12331 passes by the third bead 12181, the third spring 12182 elongates again and causes the third bead 12181 to partially enter the third limit groove 12114.

[0080] As an implementation method, a fourth receiving groove 1219 extending towards the second limit groove 12113 is provided at the bottom of the third limit groove 12114. The fourth receiving groove 1219 is used for the limit protrusion 12331 to slide into. A push plate 12191 is slidably connected in the fourth receiving groove 1219. The push plate 12191 is arranged at the notch of the fourth receiving groove 1219. The push plate 12191 and the bottom of the fourth receiving groove 1219 are connected by a fourth spring 12192. A partition block 12193 is formed between the side groove 12111 and the fourth receiving groove 1219. A second chamfer 12194 is provided on the side of the partition block 12193 close to the third limit groove 12114. The second chamfer 12194 facilitates the limit protrusion 12331 to slide from the third limit groove 12114 into the fourth receiving groove 1219, and the second chamfer 12194 also facilitates the limit protrusion 12331 to move from the bottom of the third limit groove 12114 towards the notch of the third limit groove 12114.

[0081] Through the above settings, it can remind personnel of hydrogen leakage. Specifically, after hydrogen injection is completed, the limit protrusion 12331 is located in the third limit groove 12114 and is in contact with the bottom of the third limit groove 12114. See Figure 12 ,At this time, the push plate 12191 is in contact with the limit protrusion 12331.

[0082] In the first case, when the airtightness of the valve 122 is intact, when hydrogen injection is required, manually rotate the inner gun body 123. The inner gun body 123 drives the limit projection 12331 to move towards the notch of the third limit groove 12114 and enter the side groove 12111. Then, manually drive the inner gun body 123 to move along the sliding groove 1211, so that the limit projection 12331 moves along the side groove 12111 to the first limit groove 12112 or the second limit groove 12113. Furthermore, the limit projection 12331 enters the first limit groove 12112 or the second limit groove 12113, and then the gun head 12 enters the first state or the second state. The setting of the second chamfer 12194 can prevent the limit projection 12331 from jamming with the partition block 12193 when moving towards the notch of the third limit groove 12114.

[0083] In the second case, when the second air passage 1212 leaks due to the reduced airtightness of the valve 122, hydrogen overflows from the air outlet of the branch 12122 and enters the sliding groove 1211. The hydrogen entering the sliding groove 1211 will not overflow to the atmosphere under the action of the first sealing ring 12141 and the second sealing ring 12151, thus ensuring the safety of the hydrogen injection station. In addition, under the action of the air flow at the air outlet of the branch 12122, hydrogen pushes the inner gun body 123 and makes the limit projection 12331 push the push plate 12191 and compress the fourth spring 12192. See Figure 14 , in addition, as the air pressure in the sliding groove 1211 increases, it also helps the inner gun body 123 move towards the outside of the outer gun body 121. That is, there is an air pressure difference between the upper and lower ends of the inner gun body 123. Under the action of the air pressure difference, the inner gun body 123 will move upward and push the push plate 12191 upward through the limit projection 12331. See Figure 14 , at this time, when hydrogen injection is required, the limit projection 12331 is blocked by the partition block 12193, and the personnel cannot rotate the inner gun body 123, thus reminding the personnel that the airtightness of the valve 122 has decreased and the gun head 12 needs to be repaired.

[0084] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A hydrogen injection machine, characterized in that, It includes a body and gun heads arranged on opposite sides of the body. The gun heads and the body are connected by an air pipe. The gun head includes an outer gun body and an inner gun body. One end of the outer gun body is connected to the air pipe and is provided with a valve. The other end of the outer gun body is provided with a chute. The inner gun body is slidably connected in the chute. The inner gun body is provided with a first air passage penetrating through both ends of the inner gun body. One end of the outer gun body near the valve is provided with a second air passage communicating with the air pipe. The valve is used to control the opening and closing of the second air passage; One end of the outer gun body away from the valve is provided with a flanging extending inward. The flanging is slidably connected to the inner gun body. A sealing convex edge is arranged circumferentially at one end of the inner gun body near the valve. A first sealing ring is arranged on one side of the flanging near the sealing convex edge; Side grooves are arranged on opposite sides of the chute. The extending direction of the side grooves is the same as that of the chute. A limiting protrusion is fixedly connected to the outside of the sealing convex edge. The limiting protrusion is slidably connected in the side groove. A first limiting groove for sliding the limiting protrusion into is arranged at one end of the side groove away from the valve. A second limiting groove for sliding the limiting protrusion into is arranged in the side groove. The second limiting groove is arranged on one side of the first limiting groove near the valve; When the limiting protrusion is located in the first limiting groove, the sealing convex edge abuts against the first sealing ring; A convex column is fixedly connected to one end of the inner gun body near the valve. One end of the first air passage near the valve penetrates to one end of the convex column near the valve. A sealing groove adapted to the convex column is arranged at the bottom of the chute. A second sealing ring is arranged on the inner side of the sealing groove. The second air passage includes a main path communicating with the air pipe. The valve is arranged on the main path. One end of the main path away from the air pipe branches into several branch paths. One end of the branch path away from the main path is arranged at the bottom of the chute and around the sealing groove. A third limiting groove for sliding the limiting protrusion into is arranged at one end of the side groove near the valve. The second limiting groove is arranged between the first limiting groove and the third limiting groove; When the limiting protrusion is arranged in the third limiting groove, the inner gun body abuts against the bottom of the chute, and the inner gun body covers the air outlet of the branch path. The convex column is arranged in the sealing groove; A first chamfer is arranged circumferentially at one end of the convex column near the sealing groove to facilitate the insertion of the convex column into the sealing groove.

2. The hydrogen injector according to claim 1, characterized in that, A first annular protrusion is fixedly connected to the outside of one end of the outer gun body away from the valve. A second annular protrusion is fixedly connected to the outside of one end of the inner gun body away from the valve.

3. The hydrogen injection machine according to claim 1, characterized in that, A first accommodating groove is arranged on one side of the first limiting groove near the valve. A first bead is arranged at the opening of the first accommodating groove. The first bead is connected to the bottom of the first accommodating groove by a first spring. At least part of the first bead is arranged in the first limiting groove; When the limiting protrusion abuts against the bottom of the first limiting groove, the first bead abuts against the side of the limiting protrusion close to the notch of the first limiting groove.

4. A hydrogen injection machine according to claim 1, wherein A second receiving groove is provided on the side of the second limiting groove close to the valve. A second bead is provided at the notch of the second receiving groove. The second bead is connected to the bottom of the second receiving groove by a second spring. At least part of the second bead is disposed in the second limiting groove; When the limiting protrusion abuts against the bottom of the second limiting groove, the second bead abuts against the side of the limiting protrusion close to the notch of the second limiting groove.

5. A hydrogen injection machine according to claim 1, characterized in that, A third receiving groove is provided on the side of the third limiting groove close to the valve. A third bead is provided at the notch of the third receiving groove. The third bead is connected to the bottom of the third receiving groove by a third spring. At least part of the third bead is disposed in the third limiting groove; When the limiting protrusion abuts against the bottom of the third limiting groove, the third bead abuts against the side of the limiting protrusion close to the notch of the third limiting groove.

6. The hydrogen injection machine according to claim 5, characterized in that, A fourth receiving groove extending towards the second limiting groove is provided at the bottom of the third limiting groove. The fourth receiving groove is used for the limiting protrusion to slide into. A push plate is slidably connected in the fourth receiving groove. The push plate is disposed at the notch of the fourth receiving groove. The push plate is connected to the bottom of the fourth receiving groove by a fourth spring. A partition block is formed between the side groove and the fourth receiving groove. A second chamfer is provided on the side of the partition block close to the third limiting groove. The second chamfer facilitates the limiting protrusion to slide from the third limiting groove into the fourth receiving groove, and the second chamfer facilitates the limiting protrusion to move from the bottom of the third limiting groove towards the notch of the third limiting groove.

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