on-off valve

Abstract

The present application relates to a kind of on-off valves, on-off valve connects low-carbon fuel intake pipeline and low-carbon fuel outlet pipeline, the low-carbon fuel outlet pipeline is connected with the low-carbon fuel injection device, connect nitrogen input pipeline, comprising: valve body, including first recess, first flow-through hole, second flow-through hole and third flow-through hole, first flow-through hole is communicated with first recess, second flow-through hole and third flow-through hole respectively, third flow-through hole is communicated with nitrogen input pipeline;Opening and closing control component is set in first recess, opening and closing control component realizes the communication and block between first recess and first flow-through hole, opening and closing control component realizes the communication and block of first recess and second flow-through hole;Purging component is detachably connected with valve body, is set in third flow-through hole, is communicated with nitrogen input pipeline.The on-off valve can isolate staff, eliminate the premise of leakage, safely, quickly, timing, quantitative methanol and other low-carbon fuel is provided for the injection device of ship engine.

Description

Technical Field

[0001] This invention relates to the field of experimental technology for oil and gas field development, and more specifically, to an on / off valve. Background Technology

[0002] Methanol, dimethyl ether, and other fuels are inherently volatile and toxic. However, they are also low-carbon fuels. As new low-carbon fuels such as methanol and dimethyl ether are gradually being used in ships, high-power marine engines are equipped with fuel injection devices that require the timely and quantitative supply of methanol, dimethyl ether, and other fuels to these devices. Given the volatile and toxic nature of these fuels, supplying methanol to the fuel injection device requires rapid and quantitative replenishment of methanol into the injector while isolating personnel and preventing leaks. This increases the difficulty and cost of manufacturing the valve assembly.

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

[0004] This 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's engine, while isolating personnel and preventing leakage.

[0005] This application provides an on / off valve connecting a low-carbon fuel intake pipe and a low-carbon fuel outlet pipe. The low-carbon fuel outlet pipe is connected to a low-carbon fuel injection device and a nitrogen input pipe. The valve includes: a valve body with a first groove and a first flow hole sequentially arranged in a first direction, the first groove and the first flow hole communicating; a second flow hole penetrating through the valve body in a second direction; and a third flow hole in a third direction. 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 communicating with the low-carbon fuel intake pipe, and the third flow hole communicating with the nitrogen input pipe; an on / off control component disposed in the first groove, enabling communication and blocking between the first groove and the first flow hole, and enabling communication and blocking between the first groove and the second flow hole; and a purging component detachably connected to the valve body, disposed in the third flow hole, and communicating with the nitrogen input pipe.

[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 disposed in the first groove. The opening and closing valve body has through holes at positions corresponding to the first flow hole and the second flow hole, respectively. 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 disposed inside the opening and closing valve body. The outer surface of the valve stem at the end away from the pushing component is in close contact 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 valve body sequentially forms a first cylindrical surface, a second cylindrical surface, and a conical surface. The diameter of the valve body surrounding the first cylindrical surface is larger than the diameter of the valve body surrounding the second cylindrical surface. The first elastic member is disposed inside the first cylindrical surface. The end of the valve stem away from the pushing member is attached to the conical surface. The valve body has through holes corresponding to the first flow hole and the second flow hole respectively in the area of ​​the second cylindrical surface.

[0008] In some alternative embodiments, the valve stem includes a handle and a plug head, the plug head being conical, the smaller diameter end of the plug head being connected to the handle, the handle being inserted into the first elastic member, and the conical outer surface of the plug head being able to fit against the conical inner surface of the valve body.

[0009] In some alternative embodiments, the valve body includes a solenoid valve and a piston. The solenoid valve is disposed at the end of the valve body and drives the piston. The piston is disposed inside the valve body and is connected to the handle.

[0010] In some optional embodiments, the purging component includes a purging valve body and a sliding plug. The purging valve body is disposed in the third flow hole and has a sliding groove, a limiting groove, and an air inlet. The sliding groove, the limiting groove, and the air inlet are connected. The sliding groove is close to the nitrogen input pipe. The sliding plug is disposed 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 purging valve body surrounding the limiting groove.

[0011] In some alternative embodiments, the inner surface of the purge valve body surrounding the limiting groove is tapered, and the diameter of the inner surface of the limiting groove decreases in the direction of the sliding groove near the limiting groove.

[0012] In some optional embodiments, the sliding plug includes a sliding body and a second elastic component. The sliding body has a second groove inside, and the open end of the sliding body faces the valve body. The second elastic component is disposed in the second groove and can press against the purge valve body.

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

[0014] In some optional embodiments, a third flange is also included, which 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 advantages:

[0016] This application provides an on / off valve, which includes a valve body, an opening / closing control component, and a purging component. The valve body has a first groove and a first flow hole sequentially arranged in a first direction, the first groove and the first flow hole being connected. The valve body also has a second flow hole penetrating through itself in a second direction, and a third flow hole in a third direction. The first, second, and third directions are mutually perpendicular. The second and third flow holes 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 inlet pipe. The opening / closing control component is located in the first groove and can realize the connection and blocking between the first groove and the first flow hole. When the opening / closing control component controls the connection between the first groove and the first flow hole, fuels such as methanol and dimethyl ether can be sequentially supplied. 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 block, the on / off valve will prevent fuels such as methanol and dimethyl ether from entering the low-carbon fuel injection device. The purging component is detachably connected to the valve body and is located in the third flow hole. The purging component is connected to the nitrogen input pipe. Nitrogen enters the low-carbon fuel injection device in sequence through the nitrogen input pipe, the third flow hole, the first groove, the second flow hole, and the low-carbon fuel outlet pipe. This allows the low-carbon fuel injection device to switch from the working state to the purging state, providing methanol and other low-carbon fuels to the ship's engine injection device safely, quickly, regularly, and quantitatively while isolating personnel and preventing leakage. Attached Figure Description

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

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

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

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

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

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

[0023] Figure 6 for Figure 1 A schematic cross-sectional view of the purging component in the provided embodiment.

[0024] in, Figures 1-6 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[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; 222-Blocking 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 Implementation

[0026] To better understand the above-mentioned objects, features, and advantages of this invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0028] Methanol, dimethyl ether, and other fuels are inherently volatile and toxic. However, they are also low-carbon fuels. As new low-carbon fuels such as methanol and dimethyl ether are gradually being used in ships, high-power marine engines are equipped with fuel injection devices that require the timely and quantitative supply of methanol, dimethyl ether, and other fuels to these devices. Given the volatile and toxic nature of these fuels, supplying methanol to the fuel injection device requires rapid and quantitative replenishment of methanol into the injector while isolating personnel and preventing leaks. This increases the difficulty and cost of manufacturing the valve assembly.

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

[0030] This invention provides an on / off valve, which connects a low-carbon fuel intake pipe and a low-carbon fuel outlet pipe. The low-carbon fuel outlet pipe is connected to a low-carbon fuel injection device. The on / off valve is connected to a nitrogen input pipe. The on / off valve includes: a valve body 1, with a first groove 11 and a first flow hole 12 sequentially arranged in a first direction, the first groove 11 and the first flow hole 12 communicating with each other; a second flow hole 13 penetrating through itself in a second direction; and a third flow hole 14 in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. 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 disposed 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 realizes the connection and blocking between the first groove 11 and the second flow hole 13; the purging component 3 is detachably connected to the valve body 1, disposed in the third flow hole 14, and connected to the nitrogen input pipe.

[0031] Specifically, the on / off valve includes a valve body 1, an opening / closing control component 2, and a purging component 3. The valve body has a first groove 11 and a first flow hole 12 arranged sequentially in a first direction, with the first groove 11 and the first flow hole 12 connected. The valve body 1 has a second flow hole 13 penetrating through itself in a second direction. The valve body 1 also has a third flow hole 14 in a third direction. The first, second, and third directions are mutually perpendicular. 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 a low-carbon fuel outlet pipe, and the third flow hole 14 is connected to a nitrogen inlet pipe. The opening / closing control component 2 is located in the first groove 11 and can achieve the connection and blocking between the first groove 11 and the first flow hole 12. When the opening / closing control component 2 controls the first groove 11 and the first flow hole 12 to connect, methanol, dimethyl ether, and other fuels can pass through. The fuel can sequentially pass 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 into the low-carbon fuel injection device. When the opening and closing control component 2 controls the first groove 11 and the first flow hole 12 to block, the on / off valve will prevent methanol, dimethyl ether, and other fuels from entering the low-carbon fuel injection device. The purging component 3 is detachably connected to the valve body 1. The purging component 3 is located in the third flow hole 14 and is connected to the nitrogen input pipe. Nitrogen sequentially passes 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 into the low-carbon fuel injection device, thereby realizing the transition of the low-carbon fuel injection device from the working state to the purging state. Under the premise of isolating personnel and preventing leakage, it can safely, quickly, regularly, and quantitatively provide methanol and other low-carbon fuels to the injection device of the ship's 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 disposed in the first groove 11. The opening and closing valve body 24 has 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 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 disposed inside the opening and closing valve body 24. The outer surface of the valve stem 22 away from 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 disposed at the end of the opening and closing valve body 24. The end of the opening and closing valve body 24 near the pushing component 21 is provided with a through hole, and 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 disposed 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 inserted into the first elastic component 23. During the process of the pushing component 21 driving the valve stem 22 to move up and down in the first direction, it can squeeze or release the first elastic component 23. The pushing component 21 can drive the valve stem 22 to move a certain distance inside the first groove 11 toward the first flow hole 12, so that the outer surface of the valve stem 22 away from the pushing component 21 is a certain distance away from the inner surface of the end of the valve body 24. Methanol, dimethyl ether and other fuels can sequentially pass 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 to enter the low-carbon fuel injection device; or, the pushing component 21 can drive the valve stem 22 to move a certain distance inside the first groove 11 toward the pushing component 21, so that the outer surface of the valve stem 22 away from the pushing component 21 is tightly fitted with the inner surface of the end of the valve body 24. The valve stem 22 will prevent methanol, dimethyl ether and other fuels from entering the first groove 11, thereby blocking the connection between the valve body 24 and the first flow hole 12, thus blocking methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device.

[0034] In some optional embodiments, in a first direction, the inner surface of the valve body 24 sequentially forms a first cylindrical surface, a second cylindrical surface, and a conical surface. The diameter of the valve body 24 surrounding the first cylindrical surface is larger than the diameter of the valve body 24 surrounding the second cylindrical surface. The first elastic member 23 is disposed inside the first cylindrical surface. The end of the valve stem 22 away from the pushing member 21 is attached to the conical surface. The valve body 24 is provided with through holes corresponding to the first flow hole 12 and the second flow hole 13 in the region of the second cylindrical surface.

[0035] Specifically, the first elastic component 23 is a spring. The opening and closing valve body 24 has an internal accommodating space, and the inner surface of the opening and closing valve body 24 encloses the internal space. The internal space enclosed by the inner surface of the opening and closing valve body 24 includes a first cylindrical surface, a second cylindrical surface, and a conical surface in sequence in the first direction. The first cylindrical surface, the second cylindrical surface, and the conical surface are connected. The first elastic component 23 is disposed inside the first cylindrical surface. 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. During the process of the pushing component 21 driving the valve stem 22 to move up and down in the first direction, it can squeeze or release the first elastic component 23. The pushing component 21 drives the valve stem 22 to move a certain distance inside the first groove 11 toward the first flow hole 12, so that the outer surface of the valve stem 22 away from the pushing component 21 is at a certain distance from the conical surface of the opening and closing valve body 24. Methanol, dimethyl ether and other fuels can sequentially pass 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 to enter the low-carbon fuel injection device; or, the pushing component 21 drives the valve stem 22 to move a certain distance inside the first groove 11 toward the pushing component 21, so that the outer surface of the valve stem 22 away from the pushing component 21 is in close contact with the conical surface of the opening and closing valve body 24. 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, thus blocking methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device.

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

[0037] Specifically, in the first direction, the inner surface of the opening and closing valve body 24 sequentially forms a first cylindrical surface, a second cylindrical surface, and a conical surface, which are connected. The diameter of the opening and closing valve body 24 surrounding the first cylindrical surface is larger than the diameter of the opening and closing valve body 24 surrounding the second cylindrical surface, and the first elastic member 23 is disposed 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 disposed in the first groove 11. The opening and closing valve body 24 has 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 221, and the sealing head 222 are connected in sequence. The handle 221 is inserted into the first elastic component 23. The handle 221 and the first elastic component 23 are disposed inside the first cylindrical surface. The pushing component 21 drives the valve stem 22 to move a certain distance inside the first groove 11 toward the pushing component 21, so that the outer surface of the sealing head 222 can fit tightly against 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 toward 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. 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, thus blocking methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device.

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

[0039] Specifically, the valve body 24 has two opposite ends in the first direction. The solenoid valve 211 is disposed at one end of the valve body 24. The end of the valve body 24 near the solenoid valve 211 is provided with a through hole. The end of the valve body 24 away from the push member 21 is provided with an opening. The piston 212 is disposed inside the valve body 24. The solenoid valve 211 passes through the through hole at the end of the valve body 24 and is connected to the piston 212. The push member 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 member 23. During the process of the solenoid valve 211 driving the valve stem 22 to move up and down in the first direction, it can squeeze or release the first elastic member 23. The pushing component 21 can drive the valve stem 22 to move a certain distance inside the first groove 11 toward the first flow hole 12, so that the outer surface of the valve stem 22 away from the pushing component 21 is a certain distance away from the inner surface of the end of the valve body 24. Methanol, dimethyl ether and other fuels can sequentially pass 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 to enter the low-carbon fuel injection device; or, the pushing component 21 can drive the valve stem 22 to move a certain distance inside the first groove 11 toward the pushing component 21, so that the outer surface of the valve stem 22 away from the pushing component 21 is tightly fitted with the inner surface of the end of the valve body 24. The valve stem 22 will prevent methanol, dimethyl ether and other fuels from entering the first groove 11, thereby blocking the connection between the valve body 24 and the first flow hole 12, thus blocking methanol, dimethyl ether and other fuels from entering the low-carbon fuel injection device.

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

[0041] Specifically, when nitrogen is introduced into the purging component 3, the opening and closing control component 2 is in the off state, and the purging valve body 31 is in the 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 gas input pipe. The nitrogen pushes the sliding plug 32 to move closer 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 of the purge valve body 31. The nitrogen enters the low-carbon fuel injection device in sequence 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. This enables the low-carbon fuel injection device to switch from working state to purge state, and can safely, quickly, regularly, and quantitatively provide methanol and other low-carbon fuels to the injection device of the ship engine while isolating personnel and preventing leakage. When methanol, dimethyl ether, and other fuels sequentially pass 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 into the low-carbon fuel injection device, the methanol, dimethyl ether, and other fuels enter the first groove 11, pushing the sliding plug 32 to move towards the inlet hole 313. This allows the outer surface of the end of the sliding plug 32 to fit tightly against the inner surface of the purging valve body 31's enclosing limiting groove 312, further preventing nitrogen from entering the valve body 1, thereby enabling the low-carbon fuel injection device to switch from the purging state to the working state.

[0042] In some optional embodiments, the inner surface of the purge valve body 31 surrounding the limiting groove 312 is tapered. In the direction of the sliding groove 311 near the limiting groove 312, the diameter of the inner surface of the limiting groove 312 becomes smaller and smaller. The outer surface of the end of the sliding plug 32 is tapered. The outer surface of the end of the sliding plug 32 can surround 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 purge valve body 31 surrounding the sliding groove 311 is larger than the diameter of the inner surface of the purge valve body 31 surrounding the air inlet 313. In the third direction, the conical surface of the purge valve body 31 surrounding the limiting groove 312 has the largest diameter and the smallest diameter. The diameter of the inner surface of the purge valve body 31 surrounding the sliding groove 311 is equal to the largest diameter of the conical surface of the purge valve body 31 surrounding the limiting groove 312. The diameter of the inner surface of the purge valve body 31 surrounding the air inlet 313 is equal to the smallest diameter of the conical surface of the purge valve body 31 surrounding the limiting groove 312. Nitrogen gas enters the purge valve body 31 through the gas input pipe. The nitrogen gas pushes the sliding plug 32 to move closer 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 of the purge valve body 31. The nitrogen gas 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. This enables the low-carbon fuel injection device to switch from working state to purging state, and can safely, quickly, regularly and quantitatively provide methanol and other low-carbon fuels to the injection device of the ship's engine while isolating personnel and preventing leakage. When methanol, dimethyl ether, and other fuels sequentially pass 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 into the low-carbon fuel injection device, the methanol, dimethyl ether, and other fuels enter the first groove 11, pushing the sliding plug 32 to move towards the inlet hole 313. This allows the outer surface of the end of the sliding plug 32 to fit tightly against the inner surface of the purging valve body 31's enclosing limiting groove 312, further preventing nitrogen from entering the valve body 1, thereby enabling the low-carbon fuel injection device to switch from the purging state to the working state.

[0044] In some optional embodiments, the sliding plug 32 includes a sliding body 321 and a second elastic member 322. The sliding body 321 has a second groove inside, and the open end of the sliding body 321 faces the valve body 1. The second elastic member 322 is disposed in the second groove and can press against the purge valve body 31.

[0045] Specifically, the outer surface of the sliding body 321 is conical, and the inner surface of the purge valve body 31 surrounding the limiting groove 312 is also conical. Nitrogen gas enters the purge valve body 31, and the nitrogen gas pushes the sliding body 321 to move closer to the valve body 1 until the second elastic member 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 nitrogen gas can flow fully into the valve body 1. Nitrogen gas enters the purge valve body 31 through the gas input pipe. The nitrogen gas pushes the sliding plug 32 to move closer 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 of the purge valve body 31. The nitrogen gas 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. This enables the low-carbon fuel injection device to switch from working state to purging state, and can safely, quickly, regularly and quantitatively provide methanol and other low-carbon fuels to the injection device of the ship's engine while isolating personnel and preventing leakage.

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

[0047] Specifically, the first flange 4 is detachably connected to the valve body 1; optionally, the first flange 4 and the valve body 1 are connected by bolts. The second flange 5 is detachably connected to the valve body 1, and the second flange 5 and the valve body 1 are connected 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 connects the valve body 1 and the low-carbon fuel intake pipe.

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

[0050] In this invention, the term "multiple" refers to at least two or more, unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A on-off valve connecting a low-carbon fuel gas inlet pipe and a low-carbon fuel gas outlet pipe, the low-carbon fuel gas outlet pipe being connected to a low-carbon fuel gas injection device, and a nitrogen gas input pipe, characterized by, The utility model relates to a valve body (1) is provided with first recess (11) and first flow -through hole (12) in first direction in proper order, first recess (11) and first flow -through hole (12) intercommunication, be provided with second flow -through hole (13) through itself in second direction, be provided with third flow -through hole (14) in third direction, first direction, second direction and third direction are perpendicular to each other two two, second flow -through hole (13) and third flow -through hole (14) are communicated with first recess (11) respectively, second flow -through hole (13) is communicated with low carbon fuel outlet pipeline, third flow -through hole (14) is communicated with nitrogen input pipeline, Opening and closing control part (2) is arranged in first recess (11), and opening and closing control part (2) realizes the intercommunication and block between first recess (11) and first flow -through hole (12), and opening and closing control part (2) realizes the intercommunication and block of first flow -through hole (12) and second flow -through hole (13), Purging part (3) is detachably connected with valve body (1) and is arranged in third flow -through hole (14) and is communicated with nitrogen input pipeline. Opening and closing control part (2) includes push part (21), valve stem (22), first elastic part (23) and opening and closing valve body (24), opening and closing valve body (24) is arranged in first recess (11), and opening and closing valve body (24) is provided with through -hole in the position corresponding to first flow -through hole (12) and second flow -through hole (13) respectively, and opening and closing valve body (24) has accommodating space inside, push part (21) is connected with one end of valve stem (22), valve stem (22) is inserted in first elastic part (23) near push part (21) position, valve stem (22) and first elastic part (23) are arranged in the inside of opening and closing valve body (24), and the outer surface of one end of valve stem (22) away from push part (21) is closely attached to the inner surface of the end of opening and closing valve body (24).

2. The on-off valve according to claim 1, characterized in that In first direction, the inner surface of opening and closing valve body (24) is sequentially enclosed to form first cylindrical surface, second cylindrical surface and conical surface, the diameter of opening and closing valve body (24) enclosing first cylindrical surface is greater than the diameter of opening and closing valve body (24) enclosing second cylindrical surface, first elastic part (23) is arranged in the inside of first cylindrical surface, one end of valve stem (22) away from push part (21) is attached to conical surface, and opening and closing valve body (24) is provided with through -hole corresponding to first flow -through hole (12) and second flow -through hole (13) in the area of second cylindrical surface respectively.

3. On-off valve according to claim 2, characterized in that ​ 4. The on-off valve according to claim 3, characterized in that The valve stem (22) comprises a handle (221) and a plug head (222), the plug head (222) is tapered, the end of the plug head (222) with smaller diameter is connected with the handle (221), the handle (221) is inserted into the first elastic component (23), and the tapered outer surface of the plug head (222) can be attached to the tapered 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 an electromagnetic valve (211) and a piston (212), the electromagnetic valve (211) is arranged at the end of the opening and closing valve body (24), the electromagnetic valve (211) drives the piston (212), the piston (212) is arranged in the opening and closing valve body (24), and the piston (212) is connected with the handle (221).

6. The on-off valve according to claim 1, characterized by The purge component (3) comprises a purge valve body (31) and a sliding plug (32), the purge valve body (31) is arranged in the third flow-through 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 valve body (1), and the sliding plug (32) is arranged in the sliding groove (311). The end outer surface of the sliding plug (32) can be tightly attached to the inner surface of the limiting groove (312) surrounded by the purge valve body (31).

7. On / off valve according to claim 6, characterized in that The inner surface of the limiting groove (312) surrounded by the purge valve body (31) is tapered, and in the direction close to the limiting groove (312) of the sliding groove (311), the diameter of the inner surface of the limiting groove (312) becomes smaller and smaller.

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), the inside of the sliding body (321) is provided with a second groove, 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).

9. The on-off valve according to claim 8, characterized in that The first flange (4) and the second flange (5) are arranged at the two ends of the second flow-through hole (13) penetrating through the valve body (1) respectively, and the first flange (4) and the second flange (5) are connected with the low-carbon fuel gas outlet pipeline respectively.

10. The on-off valve according to claim 9, characterized in that The third flange (6) is arranged on the valve body (1), and the third flange (6) is connected with the valve body (1) and the low-carbon fuel gas inlet pipeline.

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