Ship dual-fuel engine fuel injection device capable of reducing carbon deposition solidification

Abstract

The invention discloses a ship dual-fuel engine fuel injection device capable of reducing carbon deposition solidification in the technical field of dual-fuel engines, which comprises a shell, two feeding channels and an injection channel communicated with the two feeding channels are arranged in the shell, control valves are arranged in the two feeding channels, and the injection channel is communicated with the two feeding channels. A mounting groove is formed in the inner wall of an outlet of the shell, and a movable check block and an elastic element connected with the movable check block are arranged in the mounting groove in a sliding mode. The shell is provided with a driving assembly used for driving the movable check block to move and a detection assembly used for detecting the internal pressure of the injection channel. The pressure in the injection channel is detected through the detection assembly, and when the pressure is lower than a preset value, the driving assembly controls the movable stop block to move towards the outer side of the mounting groove so as to reduce the sectional area of the outlet of the shell, so that the fuel injection pressure is increased, fuel is fully atomized, sufficient combustion of the fuel is guaranteed, and carbon deposition on the injection device is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dual-fuel engines, and in particular to a fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification. Background Art

[0002] During the operation of a dual-fuel engine, the fuel injection system is one of the key components to ensure efficient combustion and stable operation of the engine. The fuel injection device uses direct injection technology to spray fuel directly into a high-temperature and high-pressure combustion environment to achieve the best combustion effect. However, in actual operation, due to various reasons (such as decreased efficiency of the pumping system, pipeline leakage, etc.), the injection pressure may be lower than the ideal value. Due to the lack of remedial measures in the device, the lower pressure will lead to insufficient fuel atomization. In a high-temperature and high-pressure environment, the fuel fails to burn fully, and the unburned fuel is carbonized at the nozzle to form carbon deposits. When the carbon deposits adhere to each other and the volume gradually increases, it is easy to block the nozzle of the fuel injection device. Summary of the invention

[0003] The purpose of the present invention is to provide a fuel injection device for a marine dual-fuel engine that can reduce carbon deposit solidification, so as to solve the problem raised in the above-mentioned background technology that due to the lack of remedial measures in the device, lower pressure will lead to insufficient fuel atomization, and the fuel will not be fully burned under high temperature and high pressure environment, and the unburned fuel will be carbonized at the nozzle.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification, comprising: a housing, wherein two feed channels and an injection channel communicating with the two feed channels are arranged in the housing, wherein control valves are arranged in the two feed channels, and an installation groove is arranged on the inner wall of the outlet of the housing, wherein a movable stopper and an elastic element connected to the movable stopper are slidably arranged in the installation groove;

[0005] The shell is provided with a driving component for driving the movable stopper to move and a detection component for detecting the internal pressure of the injection channel; the driving component is used to control the movable stopper to move toward the outside of the mounting groove when the detection component detects that the pressure inside the injection channel decreases, so as to reduce the cross-sectional area of ​​the shell outlet.

[0006] Preferably, the detection component includes a pressure sensor and a control device arranged in the injection channel, the driving component includes an air supply pipe arranged on the shell and an air supply device connected to the air supply pipe, and the shell is provided with an air flow channel for connecting the air supply pipe with the installation groove.

[0007] Preferably, the detection component includes a receiving groove arranged in the injection channel, a moving block slidably arranged in the receiving groove, and an elastic member connected to the moving block, and the driving component includes a flexible connecting member, and the flexible connecting member is respectively connected to the moving block and the movable stopper.

[0008] Preferably, the movable block includes a mounting block, a movable block slidably mounted on the mounting block, a push spring disposed between the mounting block and the movable block, a slot disposed on the side wall of the mounting block, a magnetic block slidably disposed in the slot, and a reset spring connected to the magnetic block, and the magnetic block is used to attract the movable block.

[0009] Preferably, a mounting rod is provided in the injection channel, and one end of the mounting rod extends to the outside of the shell and is connected to the baffle.

[0010] Preferably, the baffle includes a support plate arranged on the end of the mounting rod, a movable plate slidably arranged on the outer wall of the mounting rod, and an elastic reset member arranged between the support plate and the movable plate, the movable plate is rotatably provided with a screw sleeve for being sleeved on the outer wall of the mounting rod, the outer wall of the mounting rod is provided with a thread, and the side wall of the screw sleeve is provided with a scraper, and the scraper is used to clean the baffle.

[0011] Preferably, the scraper is provided with a scraper block for cleaning the inner wall of the shell outlet.

[0012] Preferably, the scraping block is slidably arranged on the scraping member, and an elastic supporting member is arranged between the scraping block and the scraping member.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The pressure inside the injection channel is detected by the detection component. When the pressure is lower than the preset value, the driving component controls the movable stopper to move to the outside of the installation groove to reduce the cross-sectional area of ​​the shell outlet, thereby increasing the pressure of the fuel spray, making the fuel fully atomized and ensuring the full combustion of the fuel to reduce the carbon deposits on the injection device;

[0015] 2. By setting a baffle at the outlet of the shell, the fuel sprayed from the outlet vertically impacts the baffle, which is used to optimize the atomization effect of the fuel spray, so as to make the combustion complete and further reduce the generation of carbon deposits on the injection device;

[0016] 3. When the sprayed fuel impacts the baffle, the movable plate moves closer to the support plate, driving the screw sleeve with the scraper to rotate. When the fuel stops spraying, the movable plate moves away from the support plate under the action of the elastic reset member, driving the screw sleeve with the scraper to move again. The rotation of the scraper is used to clean the baffle and the scraper block cleans the outlet to reduce the carbon deposits accumulated on the injection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of a fuel injection device for a ship dual-fuel engine according to the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the shell of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection structure between the housing and the baffle of the present invention;

[0020] Figure 4 This is a schematic diagram of the connection structure between the moving block and the flexible connecting member of the present invention;

[0021] Figure 5 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0022] Figure 6 This is a schematic diagram of the connection structure between the mounting rod and the baffle of the present invention;

[0023] Figure 7 This is a schematic diagram of the connection structure between the mounting groove and the movable stopper of the present invention;

[0024] Figure 8 It is a schematic cross-sectional structure diagram of the movable stopper of the present invention.

[0025] In the figure: 1. shell; 2. baffle; 201. support plate; 202. movable plate; 203. elastic reset member; 3. feed channel; 4. control valve; 5. injection channel; 6. pressure sensor; 7. air supply pipe; 8. moving block; 9. elastic member; 10. flexible connector; 11. air flow channel; 12. mounting groove; 13. movable block; 131. mounting block; 132. movable block; 133. push spring; 134. slot; 135. magnetic block; 136. reset spring; 14. mounting rod; 15. scraper; 16. scraper block; 17. screw sleeve; 18. elastic support member; 19. elastic element. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] See also Figure 1 and Figure 2A fuel injection device for a dual-fuel ship engine capable of reducing carbon deposit solidification comprises: a shell 1, two feed channels 3 are symmetrically opened on the top of the inner cavity of the shell 1, two feed pipes are installed on the top wall of the shell 1, the two feed pipes are respectively connected with the two feed channels 3, and fuel oil and fuel gas are respectively provided to the inside of the two feed channels 3 through the two feed pipes; an injection channel 5 is opened on the bottom of the inner cavity of the shell 1, the inner cavity top of the injection channel 5 is connected with the inner cavity bottom of the two feed channels 3, and an outlet is opened on the bottom wall of the shell 1, and the outlet is connected with the inner cavity bottom of the injection channel 5 ; A control valve 4 is installed in the inner cavity of the two feed channels 3, wherein the control valve 4 includes a mounting shell, a metal rod slidably arranged in the mounting shell, a spring arranged between the mounting shell and the metal rod, an electromagnet arranged inside the mounting shell, and a valve plate arranged on the end of the metal rod, and the metal rod can be magnetically adsorbed; when the electromagnet is energized, the metal rod is adsorbed and moved, driving the valve plate to move up, so that the feed channel 3 is connected with the injection channel 5; when the electromagnet is de-energized, the metal rod is affected by the disappearance of the magnetic attraction force, and under the action of the spring, the metal rod moves down with the valve plate, cutting off the feed channel 3 and the injection channel 5.

[0029] See also Figure 2 and Figure 5 A mounting groove 12 is provided on the inner wall of the outlet of the shell 1, a movable stopper 13 is slidably provided in the inner cavity of the mounting groove 12, and an elastic element 19 (spring) is installed between the mounting groove 12 and the movable stopper 13; a driving component is provided on the shell 1, and the driving component is used to drive the movable stopper 13 to move, and a detection component for detecting the internal pressure of the injection channel 5 is installed inside the shell 1.

[0030] It should be noted that the fuel oil or gas is ejected through the feed pipe, feed channel 3, injection channel 5, and outlet in sequence; during the fuel supply process, the detection component is used to detect the internal pressure of the injection channel 5. When the pressure inside the injection channel 5 is lower than the preset value, the drive component controls the movable stopper 13 to move to the outside of the mounting groove 12 to reduce the cross-sectional area of ​​the outlet of the shell 1, which is used to increase the pressure of the fuel ejected from the outlet, ensure that the fuel can be fully atomized after being ejected, and make the fuel fully burn, so as to reduce carbon deposits on the injection device.

[0031] It should also be noted that the number of mounting slots 12 and movable stoppers 13 corresponds one to one, and the number can be set according to specific needs.

[0032] In this embodiment, as a further optimized solution, please refer to Figure 2 , Figure 3 and Figure 5The detection component includes a pressure sensor 6 and a control device (the control device refers to a PLC controller, and the control device is located outside the injection device) arranged in the injection channel 5. The pressure sensor 6 includes a hydraulic sensor and an air pressure sensor; the driving component includes an air supply pipe 7 arranged on the side wall of the shell 1 and an air supply device (air pump) connected to the air supply pipe 7. The shell 1 is provided with an air flow channel 11, and the air flow channel 11 is used to connect the air supply pipe 7 with the installation groove 12; the air pressure and hydraulic pressure inside the injection channel 5 are detected by the hydraulic sensor and the air pressure sensor, and the information is transmitted to the control device. When the control device detects that the air pressure and hydraulic pressure are lower than the preset value, the air supply device will be controlled to work, and air will be injected into the installation groove 12 through the air supply pipe 7 and the air flow channel 11 to increase the air pressure inside the installation groove 12, which is used to push the movable block 132 to move to the outside of the installation groove 12 and enter the outlet.

[0033] It should be noted that the mounting groove 12 and the movable block 132 are sealed to avoid air leakage, and when the movable block 13 is completely returned to the inner cavity of the mounting groove 12, the inner wall of the mounting groove 12 will also scrape off the substances attached to the outer wall of the movable block 13, such as fuel and carbon deposits.

[0034] In this embodiment, as a further optimized solution, please refer to Figure 4 In addition to the above-mentioned composition, the detection component and the drive component also include the following composition; wherein, the detection component includes a receiving groove opened on the inner wall of the injection channel 5, a moving block 8 slidably arranged in the receiving groove, and an elastic member 9 (spring) arranged between the receiving groove and the moving block 8, and the drive component includes a flexible connecting member 10 (a rope, but not limited to a rope), and the flexible connecting member 10 is respectively connected to the moving block 8 and the movable stopper 13; when the pressure inside the injection channel 5 decreases, the extrusion force on the moving block 8 becomes smaller, and under the push of the elastic member 9, the moving block 8 moves toward the outside of the receiving groove, which is used to pull the flexible connecting member 10 to move the movable stopper 13 toward the outside of the mounting groove 12 to reduce the amount of flow through the outlet.

[0035] It should be noted that a support block is installed inside the injection channel 5, and a receiving groove is opened on the side wall of the support block, so that the moving block 8 is installed on the support block.

[0036] In this embodiment, as a further optimized solution, please refer to Figure 7 and Figure 8The movable stopper 13 comprises a mounting block 131, a movable block 132, a push spring 133, a magnetic block 135 and a reset spring 136; a mounting groove is provided on the side wall of the mounting block 131, the movable block 132 is slidably inserted in the mounting groove, the push spring 133 is arranged between the movable block 132 and the mounting groove, the moving direction of the movable block 132 in the mounting groove is the same as the moving direction of the movable stopper 13, and the mounting block 131 is connected to the elastic element 19; a slot 134 is provided on the inner side wall of the mounting groove, a magnetic block 135 is slidably provided in the slot 134, and a reset spring 136 is arranged between the slot 134 and the magnetic block 135, and the movable block 132 is made of a metal material (such as iron) that can be magnetically adsorbed. The side of the magnetic block 135 away from the return spring 136 extends to the outside of the mounting block 131 and fits against the inner wall of the mounting groove 12, restricting the magnetic block 135 in the mounting groove and the slot 134. At this time, the return spring 136 is in a compressed state; when the movable block 13 moves toward the outside of the mounting groove 12 until the slot 134 moves to the outside of the mounting groove 12, the restriction of the magnetic block 135 by the mounting groove 12 disappears, and under the action of the return spring 136, the magnetic block 135 moves and is misaligned with the movable block 132, so that the magnetic attraction force on the movable block 132 disappears, and under the action of the push spring 133, the movable block 132 moves toward the outside of the mounting groove, so that the blocking area of ​​the movable block 13 on the outlet is increased.

[0037] It should be noted that a non-metallic block (a material that cannot be magnetically absorbed) is installed on one side of the magnetic block 135, which is connected to the reset spring 136. A guide block is installed on the other side of the magnetic block 135. The side of the guide block away from the magnetic block 135 is in contact with the inner wall of the mounting groove 12. The guide block is triangular in shape. When the elastic element 19 pulls the movable stopper 13 to move toward the inside of the mounting groove 12, the inclined surface of the guide block is in contact with the inner wall of the mounting groove 12, which is used to squeeze the guide block toward the inside of the slot 134, so that the magnetic block 135 is aligned with the movable block 132, and is used to attract the movable block 132 to reset the movable block 132.

[0038] Example 2

[0039] As a further optimized solution of Example 1, please refer to Figure 1 , Figure 2 and Figure 3 A mounting rod 14 is provided in the inner cavity of the injection channel 5, one end of which extends to the outside of the shell 1 and is connected to the baffle 2, and there is a certain distance between the baffle 2 and the outlet; the fuel ejected from the outlet will vertically impact the baffle 2, causing the fuel to sputter, which is used to optimize the atomization effect of the fuel spray, so that the fuel burns fully and reduces the generation of carbon deposits on the injection device.

[0040] In this embodiment, as a further optimized solution, please refer to Figure 5 and Figure 6The baffle plate 2 includes a support plate 201, a movable plate 202, and an elastic reset member 203 (spring) arranged between the support plate 201 and the movable plate 202. The support plate 201 and the movable plate 202 are both circular. The support plate 201 is installed on the end of the mounting rod 14 away from the housing 1, and the movable plate 202 is slidably sleeved on the outer wall of the mounting rod 14; a screw sleeve 17 is rotatably provided on a side wall of the movable plate 202 away from the support plate 201, and the screw sleeve 17 is sleeved on the outer wall of the mounting rod 14. The outer wall of the mounting rod 14 is provided with a thread, and a scraper 15 is provided on the side wall of the screw sleeve 17. The scraper 15 is an L-shaped scraper, and the scraper 15 is in contact with a side wall of the movable plate 202 facing the housing 1, and the scraper The scraper 15 fits with the circumferential side walls of the support plate 201 and the movable plate 202; when the gas or fuel is ejected from the outlet, it will impact the movable plate 202, causing it to move closer to the support plate 201. Since the screw sleeve 17 will move with the movable plate 202, the screw sleeve 17 will rotate and carry the scraper 15 to clean the surface of the movable plate 202 and the side wall of the support plate 201; when the gas or fuel stops ejecting from the outlet, the movable plate 202 disappears due to the impact. Under the action of the elastic reset member 203, the movable plate 202 is reset, and the scraper 15 cleans the movable plate 202 and the support plate 201 again. Through periodic cleaning, the probability of carbon accumulation on the injection device is reduced.

[0041] In this embodiment, as a further optimized solution, please refer to Figure 5 and Figure 6 A scraper block 16 is provided on one side wall of the scraper 15 away from the movable plate 202, and the scraper block 16 is in contact with the inner wall of the outlet; during the rotation of the scraper 15, the scraper block 16 will rotate with it to clean the inner wall of the shell 1 outlet and reduce carbon deposits on the injection device.

[0042] In this embodiment, as a further optimized solution, please refer to Figure 6 The scraper block 16 is slidably arranged on the scraper member 15, and an elastic support member 18 (spring) is arranged between the scraper block 16 and the scraper member 15; the scraper block 16 moves on the scraper member 15, so that the movable stopper 13 will not be blocked when it moves out from the inside of the mounting groove 12.

[0043] It should be noted that the two side walls of the movable block 132 away from the mounting block 131 are both arc-shaped. When the movable block 132 enters the interior of the outlet and the scraper block 16 rotates inside the outlet, the scraper block 16 will contact the arc-shaped side walls of the movable block 132, causing the scraper block 16 to move closer to the mounting rod 14, ensuring that the scraper block 16 can pass over the movable block 132 without being blocked and stopped.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification, comprising: A shell (1), wherein two feed channels (3) and an injection channel (5) communicating with the two feed channels (3) are provided in the shell (1), and control valves (4) are provided in the two feed channels (3), characterized in that a mounting groove (12) is provided on the inner wall of the outlet of the shell (1), and a movable stopper (13) and an elastic element (19) connected to the movable stopper (13) are slidably provided in the mounting groove (12); The housing (1) is provided with a driving component for driving the movable stopper (13) to move and a detection component for detecting the internal pressure of the injection channel (5); the driving component is used to control the movable stopper (13) to move toward the outside of the installation groove (12) when the detection component detects that the pressure inside the injection channel (5) decreases, so as to reduce the cross-sectional area of ​​the outlet of the housing (1).

2. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 1, characterized in that: The detection component comprises a pressure sensor (6) and a control device arranged in the injection channel (5); the drive component comprises an air supply pipe (7) arranged on the housing (1) and an air supply device connected to the air supply pipe (7); and the housing (1) is provided with an air flow channel (11) for connecting the air supply pipe (7) with the mounting groove (12).

3. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 1, characterized in that: The detection component comprises a receiving groove arranged in the injection channel (5), a moving block (8) slidably arranged in the receiving groove, and an elastic member (9) connected to the moving block (8); the driving component comprises a flexible connecting member (10), and the flexible connecting member (10) is respectively connected to the moving block (8) and the movable stopper (13).

4. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 1, characterized in that: The movable block (13) comprises a mounting block (131), a movable block (132) slidably disposed on the mounting block (131), a pushing spring (133) disposed between the mounting block (131) and the movable block (132), a slot (134) disposed on a side wall of the mounting block (131), a magnetic block (135) slidably disposed in the slot (134), and a reset spring (136) connected to the magnetic block (135), wherein the magnetic block (135) is used to attract the movable block (132).

5. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 1, characterized in that: A mounting rod (14) is provided in the injection channel (5), one end of the mounting rod (14) extending to the outside of the housing (1) and connected to the baffle (2).

6. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 5, characterized in that: The baffle (2) comprises a support plate (201) arranged on the end of the mounting rod (14), a movable plate (202) slidably arranged on the outer wall of the mounting rod (14), and an elastic reset member (203) arranged between the support plate (201) and the movable plate (202); a screw sleeve (17) rotatably arranged on the movable plate (202) for sleeved on the outer wall of the mounting rod (14); a thread is arranged on the outer wall of the mounting rod (14); a scraper (15) is arranged on the side wall of the screw sleeve (17); and the scraper (15) is used to clean the baffle (2).

7. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 6, characterized in that: The scraper (15) is provided with a scraper block (16) for cleaning the inner wall of the outlet of the housing (1).

8. A fuel injection device for a ship dual-fuel engine capable of reducing carbon deposit solidification according to claim 7, characterized in that: The scraping block (16) is slidably arranged on the scraping member (15), and an elastic supporting member (18) is arranged between the scraping block (16) and the scraping member (15).

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