On-off valve

Abstract

The invention relates to an on-off valve which is connected with a low-carbon fuel gas inlet pipeline and a low-carbon fuel gas outlet pipeline, the low-carbon fuel gas outlet pipeline is connected with a low-carbon fuel injection device and connected with a nitrogen input pipeline, and the on-off valve comprises a valve body which comprises a first groove, a first circulation hole, a second circulation hole and a third circulation hole, the first circulation hole is communicated with the first groove, the second circulation hole and the third circulation hole, and the third circulation hole is communicated with a nitrogen input pipeline; the opening and closing control part is arranged in the first groove, the opening and closing control part achieves communication and disconnection between the first groove and the first circulation hole, and the opening and closing control part achieves communication and disconnection between the first groove and the second circulation hole; and the purging component is detachably connected with the valve body, arranged in the third circulating hole and communicated with the nitrogen input pipeline. The on-off valve can isolate workers, and on the premise that leakage is eradicated, low-carbon fuel such as methyl alcohol can be safely, rapidly, regularly and quantitatively provided for an injection device of the ship engine.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field development experiments, in particular to an on-off valve. Background Art

[0002] Fuels such as methanol and dimethyl ether are volatile and toxic, but they are low-carbon fuels. New low-carbon fuels such as methanol and dimethyl ether are gradually put into use on ships. Marine high-power engines are equipped with fuel injection devices, which need to provide methanol, dimethyl ether and other fuels to the fuel injection devices in a timely and quantitative manner. Due to the volatility and toxicity of fuels such as methanol and dimethyl ether, when supplying methanol fuel to the fuel injection device, it is necessary to quickly and quantitatively replenish methanol into the injector under the premise of isolating personnel and preventing leakage, which increases the difficulty and cost of producing and processing the valve group.

[0003] Therefore, based on the above situation, there is an urgent need to provide an on-off valve. Summary of the invention

[0004] The present application provides an on-off valve that can safely, quickly, regularly and quantitatively supply low-carbon fuels such as methanol to the injection device of a ship engine while isolating the staff and preventing leakage.

[0005] The present application provides an on-off valve, which connects a low-carbon fuel intake pipeline and a low-carbon fuel outlet pipeline, wherein the low-carbon fuel outlet pipeline is connected to the low-carbon fuel injection device and connected to a nitrogen input pipeline, comprising: a valve body, which is sequentially provided with a first groove and a first flow hole in a first direction, wherein the first groove is connected to the first flow hole, a second flow hole penetrating the valve body is provided in a second direction, and a third flow hole is provided in a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular, the second flow hole and the third flow hole are respectively connected to the first groove, the second flow hole is connected to the low-carbon fuel intake pipeline, and the third flow hole is connected to the nitrogen input pipeline; an opening and closing control component, which is provided in the first groove, wherein the opening and closing control component realizes the connection and blocking between the first groove and the first flow hole, and the opening and closing control component realizes the connection and blocking between the first groove and the second flow hole; a purge component, which is detachably connected to the valve body, is provided in the third flow hole, and is connected to the nitrogen input pipeline.

[0006] In some optional embodiments, the opening and closing control component includes a pushing component, a valve stem, a first elastic component and an opening and closing valve body, the opening and closing valve body is arranged in the first groove, the opening and closing valve body is provided with through holes at positions corresponding to the first flow hole and the second flow hole, the opening and closing valve body has an accommodating space inside, the pushing component is connected to one end of the valve stem, the valve stem is inserted into the first elastic component near the pushing component, the valve stem and the first elastic component are arranged inside the opening and closing valve body, and the outer surface of the valve stem away from one end of the pushing component is tightly fitted with the inner surface of the end of the opening and closing valve body.

[0007] In some optional embodiments, in the first direction, the inner surface of the opening and closing valve body is sequentially enclosed to form a first cylindrical surface, a second cylindrical surface and a conical surface, the diameter of the first cylindrical surface enclosed by the opening and closing valve body is larger than the diameter of the second cylindrical surface enclosed by the opening and closing valve body, the first elastic component is arranged inside the first cylindrical surface, the end of the valve stem away from the pushing component is in contact with the conical surface, and the opening and closing valve body is provided with through holes corresponding to the first flow hole and the second flow hole in the area of ​​the second cylindrical surface.

[0008] In some optional embodiments, the valve stem includes a handle rod and a plugging head, the plugging head is conical, the end of the plugging head with a smaller diameter is connected to the handle rod, the handle rod is inserted into the first elastic component, and the conical outer surface of the plugging head can fit with the conical inner surface of the opening and closing valve body.

[0009] In some optional embodiments, the opening and closing valve body includes a solenoid valve and a piston, the solenoid valve is arranged at the end of the opening and closing valve body, the solenoid valve drives the piston, the piston is arranged inside the opening and closing valve body, and the piston is connected to the handle rod.

[0010] In some optional embodiments, the purge component includes a purge valve body and a sliding plug, the purge valve body is arranged in the third flow hole, the purge valve body is provided with a sliding groove, a limit groove and an air inlet hole, the sliding groove, the limit groove and the air inlet hole are connected, the sliding groove is close to the nitrogen input pipe, the sliding plug is arranged in the sliding groove, and the outer surface of the end of the sliding plug can be tightly fitted with the inner surface of the limit groove enclosed by the purge valve body.

[0011] In some optional embodiments, the inner surface of the purge valve body surrounding the limiting groove is conical, and the diameter of the inner surface of the limiting groove becomes smaller and smaller in the direction in which the sliding groove approaches the limiting groove.

[0012] In some optional embodiments, the sliding plug includes a sliding body and a second elastic component, a second groove is arranged inside the sliding body, the opening end of the sliding body faces the valve body, the second elastic component is arranged in the second groove, and the second elastic component can be pressed against the purge valve body.

[0013] In some optional embodiments, a first flange and a second flange are further included, wherein the first flange and the second flange are respectively arranged at two ends of the second flow hole passing through the valve body, and the first flange and the second flange are respectively connected to the low-carbon fuel outlet pipe.

[0014] In some optional embodiments, a third flange is further included, wherein the third flange is disposed on the valve body and connects the valve body and the low-carbon fuel intake pipe.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] The present application provides an on-off valve, which includes a valve body, an on-off control component and a purge component. The valve body is provided with a first groove and a first flow hole in sequence in a first direction, and the first groove and the first flow hole are connected. The valve body is provided with a second flow hole that penetrates the valve body in a second direction, and the valve body is provided with a third flow hole in a third direction. The first direction, the second direction and the third direction are perpendicular to each other. The second flow hole and the third flow hole are respectively connected to the first groove, the second flow hole is connected to a low-carbon fuel outlet pipe, and the third flow hole is connected to a nitrogen input pipe. The on-off control component is provided in the first groove, and the on-off control component can realize the connection and blocking between the first groove and the first flow hole. When the on-off control component controls the first groove and the first flow hole to be connected, fuels such as methanol and dimethyl ether can be connected in sequence. The fuel enters the low-carbon fuel injection device through the low-carbon fuel intake pipe, the first flow hole, the first groove, the second flow hole and the low-carbon fuel outlet pipe. When the opening and closing control component controls the first groove and the first flow hole to be blocked, the on-off valve will prevent methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device. The purge component is detachably connected to the valve body, and the purge component is arranged at the third flow hole. The purge component is connected to the nitrogen input pipe. Nitrogen enters the low-carbon fuel injection device through the nitrogen input pipe, the third flow hole, the first groove, the second flow hole and the low-carbon fuel outlet pipe in sequence, thereby realizing the transition of the low-carbon fuel injection device from the working state to the purge state. Under the premise of isolating the staff and preventing leakage, the injection device of the hull engine can be provided with low-carbon fuels such as methanol safely, quickly, regularly and quantitatively. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of an on-off valve provided in an embodiment of the present invention is shown;

[0019] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the on-off valve of the provided embodiment;

[0020] Figure 3 for Figure 1 A partial cross-sectional schematic diagram of the on-off valve of the provided embodiment;

[0021] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the on-off valve of the provided embodiment;

[0022] Figure 5 for Figure 1 A schematic cross-sectional structure diagram of the opening and closing control component of the provided embodiment;

[0023] Figure 6 for Figure 1 A schematic diagram of the cross-sectional structure of the purge component of the provided embodiment.

[0024] in, Figures 1 to 6 The corresponding relationship between the reference numerals and component names in the figure is:

[0025] 1-valve body; 11-first groove; 12-first flow hole; 13-second flow hole; 14-third flow hole; 2-opening and closing control component; 21-pushing component; 211-solenoid valve; 212-piston; 22-valve stem; 221-handle rod; 222-sealing head; 23-first elastic component; 24-opening and closing valve body; 3-purge component; 31-purge valve body; 311-sliding groove; 312-limiting groove; 313-air inlet; 32-sliding plug; 321-sliding body; 322-second elastic component; 4-first flange; 5-second flange; 6-third flange. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] Fuels such as methanol and dimethyl ether are volatile and toxic, but they are low-carbon fuels. New low-carbon fuels such as methanol and dimethyl ether are gradually put into use on ships. Marine high-power engines are equipped with fuel injection devices, which need to provide methanol, dimethyl ether and other fuels to the fuel injection devices in a timely and quantitative manner. Due to the volatility and toxicity of fuels such as methanol and dimethyl ether, when supplying methanol fuel to the fuel injection device, it is necessary to quickly and quantitatively replenish methanol into the injector under the premise of isolating personnel and preventing leakage, which increases the difficulty and cost of producing and processing the valve group.

[0029] Therefore, based on the above situation, there is an urgent need to provide an on-off valve.

[0030] The present invention provides an on-off valve, which is connected to a low-carbon fuel inlet pipe and a low-carbon fuel outlet pipe, the low-carbon fuel outlet pipe is connected to a low-carbon fuel injection device, and the on-off valve is connected to a nitrogen input pipe. The on-off valve comprises: a valve body 1, a first groove 11 and a first flow hole 12 are sequentially arranged in a first direction, the first groove 11 and the first flow hole 12 are connected, a second flow hole 13 penetrating the valve body is arranged in a second direction, and a third flow hole 14 is arranged in a third direction, the first direction, the second direction and the third direction are perpendicular to each other, and the second flow hole 14 is arranged in a third direction. The flow hole 13 and the third flow hole 14 are respectively connected to the first flow hole 12, the second flow hole 13 is connected to the low-carbon fuel intake pipe, and the third flow hole 14 is connected to the nitrogen input pipe; the opening and closing control component 2 is arranged in the first groove 11, and the opening and closing control component 2 realizes the connection and blocking between the first groove 11 and the first flow hole 12, and the opening and closing control component 2 realizes the connection and blocking between the first groove 11 and the second flow hole 13; the purge component 3 is detachably connected to the valve body 1, is arranged in the third flow hole 14, and is connected to the nitrogen input pipe.

[0031] Specifically, the on-off valve includes a valve body 1, an opening and closing control component 2 and a purge component 3. The valve body is sequentially provided with a first groove 11 and a first flow hole 12 in the first direction, and the first groove 11 is connected to the first flow hole 12. The valve body 1 is provided with a second flow hole 13 penetrating through the valve body in the second direction. The valve body 1 is provided with a third flow hole 14 in the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The second flow hole 13 and the third flow hole 14 are respectively connected to the first groove 11, the second flow hole 13 is connected to the low-carbon fuel outlet pipe, and the third flow hole 14 is connected to the nitrogen input pipe. The opening and closing control component 2 is provided in the first groove 11. The opening and closing control component 2 can realize the connection and blocking between the first groove 11 and the first flow hole 12. When the opening and closing control component 2 controls the first groove 11 to be connected to the first flow hole 12, methanol, dimethyl ether and other fuels The material can enter the low-carbon fuel injection device through the low-carbon fuel intake pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence. When the opening and closing control component 2 controls the first groove 11 and the first flow hole 12 to be blocked, the on-off valve will prevent methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device. The purge component 3 is detachably connected to the valve body 1, and the purge component 3 is arranged in the third flow hole 14. The purge component 3 is connected to the nitrogen input pipe. Nitrogen enters the low-carbon fuel injection device through the nitrogen input pipe, the third flow hole 14, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence, thereby realizing the low-carbon fuel injection device from the working state to the purge state. Under the premise of isolating the staff and preventing leakage, it can safely, quickly, regularly and quantitatively provide methanol and other low-carbon fuels to the injection device of the hull engine.

[0032] In some optional embodiments, the opening and closing control component 2 includes a pushing component 21, a valve stem 22, a first elastic component 23 and an opening and closing valve body 24. The opening and closing valve body 24 is arranged in the first groove 11. The opening and closing valve body 24 is provided with through holes at positions corresponding to the first flow hole 12 and the second flow hole 13, respectively. The opening and closing valve body 24 has an accommodating space inside. The pushing component 21 is connected to one end of the valve stem 22. The valve stem 22 is inserted into the first elastic component 23 near the pushing component 21. The valve stem 22 and the first elastic component 23 are arranged inside the opening and closing valve body 24. The outer surface of the valve stem 22 away from the end of the pushing component 21 is tightly fitted with the inner surface of the end of the opening and closing valve body 24.

[0033] Specifically, the first elastic component 23 is a spring. The opening and closing valve body 24 has two opposite ends in the first direction, the pushing component 21 is arranged at the end of the opening and closing valve body 24, the end of the opening and closing valve body 24 close to the pushing component 21 is provided with a through hole, the end of the opening and closing valve body 24 away from the pushing component 21 is provided with an opening, the pushing component 21 is arranged inside the opening and closing valve body 24, the opening and closing valve body 24 passes through the through hole at the end of the pushing component 21 and is connected to the pushing component 21, the pushing component 21 can drive the valve stem 22 to move up and down in the first direction, the valve stem 22 is plugged into the first elastic component 23, and the pushing component 21 can drive the valve stem 22 to move up and down in the first direction to squeeze or release the first elastic component 23. The pushing component 21 can drive the valve stem 22 to move a certain distance in the direction of the first flow hole 12 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is at a certain distance from the inner surface of the end of the opening and closing valve body 24, and fuels such as methanol and dimethyl ether can enter the low-carbon fuel injection device through the low-carbon fuel intake pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence; or, the pushing component 21 can drive the valve stem 22 to move a certain distance in the direction of the pushing component 21 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is tightly fitted with the inner surface of the end of the opening and closing valve body 24, and the valve stem 22 will prevent fuels such as methanol and dimethyl ether from entering the first groove 11, thereby blocking the connection between the opening and closing valve body 24 and the first flow hole 12, thereby blocking fuels such as methanol and dimethyl ether from entering the low-carbon fuel injection device.

[0034] In some optional embodiments, in the first direction, the inner surface of the opening and closing valve body 24 sequentially encloses a first cylindrical surface, a second cylindrical surface and a conical surface, the diameter of the first cylindrical surface enclosed by the opening and closing valve body 24 is larger than the diameter of the second cylindrical surface enclosed by the opening and closing valve body 24, the first elastic component 23 is arranged inside the first cylindrical surface, the end of the valve stem 22 away from the pushing component 21 is in contact with the conical surface, and the opening and closing valve body 24 is provided with through holes corresponding to the first flow hole 12 and the second flow hole 13 in the area of ​​the second cylindrical surface.

[0035] Specifically, the first elastic component 23 is a spring. An accommodating space is provided inside the opening and closing valve body 24, and the inner surface of the opening and closing valve body 24 encloses an inner space, and the inner surface of the opening and closing valve body 24 encloses an inner space, which includes a first cylindrical surface, a second cylindrical surface, and a conical surface in the first direction, and the first cylindrical surface, the second cylindrical surface, and the conical surface are connected, and the first elastic component 23 is provided inside the first cylindrical surface, and the pushing component 21 can drive the valve stem 22 to move up and down in the first direction, and the valve stem 22 is plugged into the first elastic component 23, and the pushing component 21 can drive the valve stem 22 to move up and down in the first direction, and can squeeze or release the first elastic component 23. The pushing component 21 drives the valve stem 22 to move a certain distance in the direction of the first flow hole 12 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is at a certain distance from the conical surface of the opening and closing valve body 24, and fuels such as methanol and dimethyl ether can enter the low-carbon fuel injection device through the low-carbon fuel intake pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence; or, the pushing component 21 drives the valve stem 22 to move a certain distance in the direction of the pushing component 21 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is tightly fitted with the conical surface of the opening and closing valve body 24, and the valve stem 22 will prevent fuels such as methanol and dimethyl ether from entering the first groove 11, thereby blocking the connection between the opening and closing valve body 24 and the first flow hole 12, thereby blocking fuels such as methanol and dimethyl ether from entering the low-carbon fuel injection device.

[0036] In some optional embodiments, the valve stem 22 includes a handle rod 221 and a plugging head 222. The plugging head 222 is conical, and the end of the plugging head 222 with a smaller diameter is connected to the handle rod 221. The handle rod 221 is inserted into the first elastic component 23. The conical outer surface of the plugging head 222 can fit with the conical inner surface of the opening and closing valve body 24.

[0037] Specifically, in the first direction, the inner surface of the opening and closing valve body 24 sequentially encloses a first cylindrical surface, a second cylindrical surface and a conical surface, the first cylindrical surface, the second cylindrical surface and the conical surface are connected, the diameter of the first cylindrical surface enclosed by the opening and closing valve body 24 is larger than the diameter of the second cylindrical surface enclosed by the opening and closing valve body 24, and the first elastic component 23 is arranged inside the first cylindrical surface. The opening and closing control component 2 includes a pushing component 21, a valve stem 22, a first elastic component 23 and an opening and closing valve body 24. The opening and closing valve body 24 is arranged in the first groove 11. The opening and closing valve body 24 is respectively provided with through holes at positions corresponding to the first flow hole 12 and the second flow hole 13. The opening and closing valve body 24 has an accommodating space inside. The pushing component 21, the handle rod 221 and the plugging head 222 are connected in sequence. The handle rod 221 is inserted into the first elastic component 23. The handle rod 221 and the first elastic component 23 are arranged inside the first cylindrical surface. The pushing component 21 drives the valve stem 22 to move a certain distance in the direction of the pushing component 21 inside the first groove 11, so that the outer surface of the plugging head 222 can fit tightly with the conical surface of the opening and closing valve body 24. Alternatively, the pushing component 21 drives the valve stem 22 to move a certain distance inside the first groove 11 in the direction of the pushing component 21, so that the outer surface of the sealing head 222 is tightly fitted with the conical surface of the opening and closing valve body 24, and the valve stem 22 will prevent methanol, dimethyl ether and other fuels from entering the first groove 11, thereby blocking the connection between the opening and closing valve body 24 and the first flow hole 12, thereby blocking methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device.

[0038] In some optional embodiments, the opening and closing valve body 24 includes a solenoid valve 211 and a piston 212. The solenoid valve 211 is arranged at the end of the opening and closing valve body 24. The solenoid valve 211 drives the piston 212. The piston 212 is arranged inside the opening and closing valve body 24. The piston 212 is connected to the handle rod 221.

[0039] Specifically, the opening and closing valve body 24 has two opposite ends in the first direction, the solenoid valve 211 is arranged at the end of the opening and closing valve body 24, a through hole is arranged at the end of the opening and closing valve body 24 close to the solenoid valve 211, and an opening is arranged at the end of the opening and closing valve body 24 away from the pushing component 21, the piston 212 is arranged inside the opening and closing valve body 24, the solenoid valve 211 passes through the through hole at the end of the opening and closing valve body 24 and is connected to the piston 212, the pushing component 21 can drive the valve stem 22 to move up and down in the first direction, the valve stem 22 is inserted into the first elastic component 23, and the solenoid valve 211 can drive the valve stem 22 to move up and down in the first direction to squeeze or release the first elastic component 23. The pushing component 21 can drive the valve stem 22 to move a certain distance in the direction of the first flow hole 12 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is at a certain distance from the inner surface of the end of the opening and closing valve body 24, and fuels such as methanol and dimethyl ether can enter the low-carbon fuel injection device through the low-carbon fuel intake pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence; or, the pushing component 21 can drive the valve stem 22 to move a certain distance in the direction of the pushing component 21 inside the first groove 11, so that the outer surface of the valve stem 22 away from one end of the pushing component 21 is tightly fitted with the inner surface of the end of the opening and closing valve body 24, and the valve stem 22 will prevent fuels such as methanol and dimethyl ether from entering the first groove 11, thereby blocking the connection between the opening and closing valve body 24 and the first flow hole 12, thereby blocking fuels such as methanol and dimethyl ether from entering the low-carbon fuel injection device.

[0040] In some optional embodiments, the purge component 3 includes a purge valve body 31 and a sliding plug 32. The purge valve body 31 is arranged in the third flow hole 14. The purge valve body 31 is provided with a sliding groove 311, a limiting groove 312 and an air inlet hole 313. The sliding groove 311, the limiting groove 312 and the air inlet hole 313 are connected. The sliding groove 311 is close to the nitrogen input pipeline. The sliding plug 32 is arranged in the sliding groove 311. The outer surface of the end of the sliding plug 32 can fit tightly with the inner surface of the limiting groove 312 enclosed by the purge valve body 31.

[0041] Specifically, when nitrogen is introduced into the purge component 3, the opening and closing control component 2 is in an open state, and the purge valve body 31 is in a closed state. The purge valve body 31 is provided with a sliding groove 311, a limiting groove 312 and an air inlet 313. The sliding groove 311 of the purge valve body 31 is close to the valve body 1. The air inlet 313 of the purge valve body 31 is connected to the nitrogen input pipe. Nitrogen enters the purge valve body 31 from the air input pipe. The nitrogen pushes the sliding plug 32 to move in the direction close to the valve body 1, so that the outer surface of the end of the sliding plug 32 can have a certain gap with the inner surface of the limiting groove 312 enclosed by the purge valve body 31. The nitrogen enters the low-carbon fuel injection device through the nitrogen input pipe, the third flow hole 14, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in turn, thereby realizing the low-carbon fuel injection device from the working state to the purge state. On the premise of isolating the staff and preventing leakage, it can safely, quickly, regularly and quantitatively provide low-carbon fuels such as methanol to the injection device of the hull engine. When methanol, dimethyl ether and other fuels enter the low-carbon fuel injection device through the low-carbon fuel inlet pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence, methanol, dimethyl ether and other fuels enter the first groove 11, pushing the sliding plug 32 to move toward the direction of the inlet hole 313, so that the outer surface of the end of the sliding plug 32 can fit tightly with the inner surface of the limiting groove 312 enclosed by the purge valve body 31, further preventing nitrogen from entering the valve body 1, thereby realizing the low-carbon fuel injection device from the purge state to the working state.

[0042] In some optional embodiments, the inner surface of the limiting groove 312 enclosed by the purge valve body 31 is conical, and in the direction where the sliding groove 311 approaches the limiting groove 312, the diameter of the inner surface of the limiting groove 312 becomes smaller and smaller, and the outer surface of the end of the sliding plug 32 is conical, and the outer surface of the end of the sliding plug 32 can enclose the inner surface of the limiting groove 312 with the purge valve body 31.

[0043] Specifically, the purge valve body 31 is provided with a sliding groove 311, a limiting groove 312 and an air inlet 313. The sliding groove 311 of the purge valve body 31 is close to the valve body 1. The air inlet 313 of the purge valve body 31 is connected to the nitrogen input pipeline. The diameter of the inner surface of the sliding groove 311 enclosed by the purge valve body 31 is larger than the diameter of the inner surface of the air inlet 313 enclosed by the purge valve body 31. In the third direction, the conical surface of the limiting groove 312 enclosed by the purge valve body 31 has a maximum diameter and a minimum diameter. The diameter of the inner surface of the sliding groove 311 enclosed by the purge valve body 31 is equal to the maximum diameter of the conical surface of the limiting groove 312 enclosed by the purge valve body 31, and the diameter of the inner surface of the air inlet 313 enclosed by the purge valve body 31 is equal to the minimum diameter of the conical surface of the limiting groove 312 enclosed by the purge valve body 31. Nitrogen enters the purge valve body 31 from the gas input pipe, and the nitrogen pushes the sliding plug 32 to move in the direction close to the valve body 1, so that the outer surface of the end of the sliding plug 32 can have a certain gap with the inner surface of the limiting groove 312 enclosed by the purge valve body 31. Nitrogen enters the low-carbon fuel injection device through the nitrogen input pipe, the third flow hole 14, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in turn, thereby realizing the low-carbon fuel injection device from the working state to the purge state. It can isolate the staff and prevent leakage, and safely, quickly, regularly and quantitatively provide low-carbon fuels such as methanol to the injection device of the hull engine. When methanol, dimethyl ether and other fuels enter the low-carbon fuel injection device through the low-carbon fuel inlet pipe, the first flow hole 12, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in sequence, methanol, dimethyl ether and other fuels enter the first groove 11, pushing the sliding plug 32 to move toward the direction of the inlet hole 313, so that the outer surface of the end of the sliding plug 32 can fit tightly with the inner surface of the limiting groove 312 enclosed by the purge valve body 31, further preventing nitrogen from entering the valve body 1, thereby realizing the low-carbon fuel injection device from the purge state to the working state.

[0044] In some optional embodiments, the sliding plug 32 includes a sliding body 321 and a second elastic component 322, a second groove is arranged inside the sliding body 321, the opening end of the sliding body 321 faces the valve body 1, the second elastic component 322 is arranged in the second groove, and the second elastic component 322 can be pressed against the purge valve body 31.

[0045] Specifically, the outer surface of the end of the sliding body 321 is conical, and the inner surface of the purge valve body 31 enclosing the limiting groove 312 is conical. Nitrogen enters the purge valve body 31, and the nitrogen pushes the sliding body 321 to move toward the direction close to the valve body 1 until the second elastic component 322 presses against the valve body 1, preventing the sliding body 321 from blocking the connection between the valve body 1 and the third flow hole 14, so that the nitrogen can fully flow into the valve body 1. Nitrogen enters the purge valve body 31 from the gas input pipe, and the nitrogen pushes the sliding plug 32 to move in the direction close to the valve body 1, so that the outer surface of the end of the sliding plug 32 can have a certain gap with the inner surface of the limiting groove 312 enclosed by the purge valve body 31. Nitrogen enters the low-carbon fuel injection device through the nitrogen input pipe, the third flow hole 14, the first groove 11, the second flow hole 13 and the low-carbon fuel outlet pipe in turn, thereby realizing the low-carbon fuel injection device from the working state to the purge state. It can isolate the staff and prevent leakage, and safely, quickly, regularly and quantitatively provide low-carbon fuels such as methanol to the injection device of the hull engine.

[0046] In some optional embodiments, the on-off valve further includes a first flange 4 and a second flange 5, which are respectively arranged at both ends of the valve body 1 passing through the second flow hole 13, and the first flange 4 and the second flange 5 are respectively connected to the low-carbon fuel outlet pipe.

[0047] Specifically, the first flange 4 is detachably connected to the valve body 1, and optionally, the first flange 4 is connected to the valve body 1 by bolts. The second flange 5 is detachably connected to the valve body 1, and the second flange 5 is connected to the valve body 1 by bolts.

[0048] In some optional embodiments, the on-off valve further includes a third flange 6 , which is disposed on the valve body 1 , and the third flange 6 connects the valve body 1 and the low-carbon fuel intake pipeline.

[0049] Specifically, the third flange 6 is detachably connected to the valve body 1 . Optionally, the third flange 6 is connected to the valve body 1 by bolts.

[0050] In the present invention, the term "plurality" means at least two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-off valve, connecting a low-carbon fuel inlet pipe and a low-carbon fuel outlet pipe, wherein the low-carbon fuel outlet pipe is connected to the low-carbon fuel injection device and connected to a nitrogen input pipe, characterized in that: include: A valve body (1), having a first groove (11) and a first flow hole (12) arranged in sequence in a first direction, wherein the first groove (11) and the first flow hole (12) are communicated with each other, having a second flow hole (13) penetrating the valve body in a second direction, and having a third flow hole (14) arranged in a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular, the second flow hole (13) and the third flow hole (14) are respectively communicated with the first groove (11), the second flow hole (13) is communicated with the low-carbon fuel intake pipe, and the third flow hole (14) is communicated with the nitrogen input pipe; an opening and closing control component (2) disposed in the first groove (11), the opening and closing control component (2) realizing communication and blocking between the first groove (11) and the first flow hole (12), and the opening and closing control component (2) realizing communication and blocking between the first groove (11) and the second flow hole (13); A purge component (3) is detachably connected to the valve body (1), is arranged in the third flow hole (14), and is communicated with the nitrogen input pipeline.

2. The on-off valve according to claim 1, characterized in that: The opening and closing control component (2) comprises a pushing component (21), a valve stem (22), a first elastic component (23) and an opening and closing valve body (24); the opening and closing valve body (24) is arranged in the first groove (11); the opening and closing valve body (24) is provided with through holes at positions corresponding to the first flow hole (12) and the second flow hole (13); the opening and closing valve body (24) has a accommodating space inside; the pushing component (21) is connected to one end of the valve stem (22); the valve stem (22) is inserted into the first elastic component (23) near the pushing component (21); the valve stem (22) and the first elastic component (23) are arranged inside the opening and closing valve body (24); the outer surface of the valve stem (22) away from one end of the pushing component (21) is tightly fitted with the inner surface of the end of the opening and closing valve body (24).

3. The on-off valve according to claim 2, characterized in that: In the first direction, the inner surface of the opening and closing valve body (24) is sequentially enclosed to form a first cylindrical surface, a second cylindrical surface and a conical surface, the diameter of the first cylindrical surface enclosed by the opening and closing valve body (24) is larger than the diameter of the second cylindrical surface enclosed by the opening and closing valve body (24), the first elastic component (23) is arranged inside the first cylindrical surface, the end of the valve stem (22) away from the pushing component (21) is in contact with the conical surface, and the opening and closing valve body (24) is provided with through holes corresponding to the first flow hole (12) and the second flow hole (13) in the area of ​​the second cylindrical surface.

4. The on-off valve according to claim 3, characterized in that: The valve stem (22) comprises a handle rod (221) and a plugging head (222); the plugging head (222) is conical, and the end of the plugging head (222) with a smaller diameter is connected to the handle rod (221); the handle rod (221) is inserted into the first elastic component (23); the conical outer surface of the plugging head (222) can fit with the conical inner surface of the opening and closing valve body (24).

5. The on-off valve according to claim 4, characterized in that: The opening and closing valve body (24) comprises a solenoid valve (211) and a piston (212); the solenoid valve (211) is arranged at the end of the opening and closing valve body (24); the solenoid valve (211) drives the piston (212); the piston (212) is arranged inside the opening and closing valve body (24); and the piston (212) is connected to the handle rod (221).

6. The on-off valve according to claim 1, characterized in that: The purge component (3) comprises a purge valve body (31) and a sliding plug (32); the purge valve body (31) is arranged at the third flow hole (14); the purge valve body (31) is provided with a sliding groove (311), a limiting groove (312) and an air inlet hole (313); the sliding groove (311), the limiting groove (312) and the air inlet hole (313) are communicated; the sliding groove (311) is close to the nitrogen input pipeline; the sliding plug (32) is arranged in the sliding groove (311); and the outer surface of the end of the sliding plug (32) can be tightly fitted with the inner surface of the purge valve body (31) enclosing the limiting groove (312).

7. The on-off valve according to claim 6, characterized in that: The inner surface of the purge valve body (31) surrounding the limiting groove (312) is conical, and the diameter of the inner surface of the limiting groove (312) becomes smaller and smaller in the direction in which the sliding groove (311) approaches the limiting groove (312).

8. The on-off valve according to claim 7, characterized in that: The sliding plug (32) comprises a sliding body (321) and a second elastic component (322), wherein a second groove is arranged inside the sliding body (321), the opening end of the sliding body (321) faces the valve body (1), and the second elastic component (322) is arranged in the second groove, and the second elastic component (322) can be pressed against the purge valve body (31).

9. The on-off valve according to claim 8, characterized in that: It also includes a first flange (4) and a second flange (5), wherein the first flange (4) and the second flange (5) are respectively arranged at two ends of the valve body (1) passing through the second flow hole (13), and the first flange (4) and the second flange (5) are respectively connected to the low-carbon fuel outlet pipe.

10. The on-off valve according to claim 9, characterized in that: It also comprises a third flange (6), wherein the third flange (6) is arranged on the valve body (1), and the third flange (6) connects the valve body (1) and the low-carbon fuel intake pipe.

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