Oil sprayer with cooling mechanism

Abstract

The invention discloses an oil sprayer with a cooling mechanism and relates to the field of oil sprayers, the oil sprayer comprises an oil sprayer body, an annular mounting groove is formed in the outer side of the oil sprayer body, a first cooling cover is attached to the outer side of the mounting groove, and a second cooling cover is arranged on the front side of the first cooling cover; the first cooling cover and the second cooling cover are installed on the outer side of the installation groove in a surrounding mode, and elastic butt joint mechanisms are arranged on the outer side of the first cooling cover and the outer side of the second cooling cover. According to the oil sprayer with the cooling mechanism, only the mounting groove for providing the mounting position for the cooling structure is formed in the oil sprayer body, the oil sprayer body is slightly changed, the groove body is directly and additionally formed in the surface of a workpiece, an original production line can be continuously utilized, the production difficulty is low, and the oil sprayer body is cooled in cooperation with the first cooling cover and the second cooling cover; and the first cooling cover and the second cooling cover can change along with the change of the volume of the oil injector body, so that the fitting effect is kept, and the cooling is kept stable.

Description

Technical Field

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[0003] , ,

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[0001]

[0001] The present invention relates to the technical field of fuel injectors, and particularly to a fuel injector with a cooling mechanism. Background Art

[0002] As a precision device applied to an engine, the performance of a fuel injector affects the operation effect of the engine. During the operation of an internal combustion engine, the fuel injector is long-term exposed to a high-temperature environment, prone to overheating, resulting in a decline in the performance of electronic components and sealing materials inside the fuel injector, and also causing problems such as fuel evaporation and carbon deposition, thus affecting the injection accuracy of the fuel injector and the overall performance of the engine.

[0003] Prior art 1 (a Chinese patent with the application number CN201921245618.9 and published on June 5, 2020) is a new type of fuel injector with a cooling structure, including the body of the fuel injector. A control chamber and a needle valve chamber are respectively provided at the top end and the bottom end inside the body. An oil outlet is provided at the center of the bottom end of the body. The control chamber and the needle valve chamber are separated by a partition block; a main oil passage is provided on the side wall of the body, extending from one side of the middle part of the body to above the oil outlet. The main oil passage is connected to a sub-oil passage through a release hole, and the release hole is provided inside the partition block. The sub-oil passage extends from the top end of the body to the bottom end of the body. Through the design of the cooling flow passage of the fuel injector head, the heat of the low-temperature oil at the fuel injector head can be taken away, thus playing a role in cooling the fuel injector head, reducing carbon deposition and coking at the fuel injector head, thereby ensuring the injection quality and engine performance, and improving the service life of the fuel injector head and the valve seat. It can dissipate heat from the coil and improve the service life of the coil; Prior art 2 (a Chinese patent with the application number CN201620999561.1 and published on April 12, 2017) is a heavy machinery fuel injector device with circulating cooling. A pressure regulating nut is provided at the top end of the fuel injector body. A pressure regulating spring is provided directly below the pressure regulating nut. A push rod is provided below the pressure regulating spring, and the push rod is fixedly connected to the needle valve. An oil passage is provided inside the fuel injector body. A return oil pipe is provided on the right part of the fuel injector body. A spiral cooling pipe is provided inside the fuel injector body. The spiral cooling pipe is connected to a water tank through a return water pipe. The water tank is connected to a circulating water pump through a water suction pipe. The circulating water pump is connected to the spiral cooling pipe through a water inlet pipe. A refrigerator is provided between the circulating water pump and the fuel injector body. The water inlet pipe is spirally wound around the refrigerator. A microcontroller is provided at the top end of the water tank. The circulating water pump and the refrigerator are electrically connected to the microcontroller through wires.

[0004] At present, when cooling the injector, when setting up the cooling structure inside the injector, it is necessary to make many adjustments and changes to the inside of the injector, which makes the original production line of the injector unable to continue to be used and increases the difficulty of manufacturing the injector. When an external heat dissipation structure is used for heat dissipation, the contact area between the spiral tube structure and the injector is small, and a gap will be generated between the injector and the cooling structure when the injector expands and contracts due to thermal expansion and contraction, resulting in the cooling structure not being able to fully exert its effect and the cooling effect being reduced. Summary of the Invention

[0005] The object of the present invention is to provide a fuel injector with a cooling mechanism to solve the problem raised in the above-mentioned background technology that when cooling the current fuel injector, when setting the cooling structure inside the fuel injector, it is necessary to make many adjustments and changes to the interior of the fuel injector, resulting in the original production line of the fuel injector being unable to continue to be used and increasing the difficulty of manufacturing the fuel injector. When an external heat dissipation structure is used for heat dissipation, the contact area between the spiral tube structure and the fuel injector is small, and a gap is generated between the fuel injector and the cooling structure when the thermal expansion and contraction change, resulting in the cooling structure not being able to fully exert its effect.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an injector with a cooling mechanism, comprising an injector body, an annular mounting groove is provided on the outer side of the injector body, and a first cooling cover is fitted on the outer side of the mounting groove, and a second cooling cover is provided on the front side of the first cooling cover, the first cooling cover and the second cooling cover are enclosed and mounted on the outer side of the mounting groove, an elastic docking mechanism is provided on the outer sides of the first cooling cover and the second cooling cover, the first cooling cover and the second cooling cover are tightly attached to the outer side of the mounting groove through the elastic docking mechanism, and the inner sides of the first cooling cover and the second cooling cover are connected to a flexible thermal pad, the flexible thermal pad is fitted with the surface of the mounting groove, a first liquid storage chamber is provided inside the first cooling cover, a second liquid storage chamber is provided inside the second cooling cover, and the second liquid storage chamber is designed with an upper and lower partitioned structure, and the upper and lower sides of the second liquid storage chamber are respectively connected to circulating liquid connectors for connecting to an external circulating cooling pipeline.

[0007] To further optimize the technical solution, a nozzle is provided below the injector body, a sealing ring is provided at the connection between the nozzle and the injector body, and a wiring seat is provided above the injector body.

[0008] Further optimizing the technical solution, the elastic docking mechanism includes a first connecting seat, a second connecting seat, a plug-in block, a connecting groove and a pulling mechanism; A first connecting seat is fixed on the left and right sides of the first cooling cover; A second connecting seat is fixed on the left and right sides of the second cooling cover; A plug-in block, fixed to the rear side of the second connecting seat; A connecting groove is provided inside the first connecting seat, and a nested connection is formed between the plug-in block and the connecting groove; The pulling mechanism is arranged inside the plug-in block to control the connection between the plug-in block and the connecting groove.

[0009] Further optimizing this technical solution, the pulling mechanism includes an adjustment block, a strong spring and an active control mechanism; The adjusting block is arranged on the upper and lower sides of the plug-in block, and the outer end of the adjusting block is designed with an inclined structure; A strong spring is fixed under the adjusting block to provide thrust for the adjusting block. When the adjusting block moves to the outside of the first connecting seat, the strong spring squeezes the first connecting seat to move the adjusting block. The active control mechanism is arranged on the inner side of the regulating block to control the contraction of the regulating block.

[0010] Further optimizing this technical solution, the active control mechanism includes a traction rope, a control plate, an adjustment rod and a guide shaft; a traction rope, fixed to the inner end of the adjustment block; A control panel is arranged inside and between the plug-in blocks to form a forward and backward sliding structure, and the control panel is fixedly connected to the traction rope; An adjusting rod is rotatably mounted on the front side of the control panel, and a front end of the adjusting rod passes through the front side surface of the second connecting seat and forms a threaded connection between the second connecting seat; The guide shaft is arranged on the outside of the traction rope to guide the direction of the traction rope.

[0011] To further optimize the technical solution, auxiliary docking mechanisms are provided above the first connecting seat and above the second connecting seat to position the installation of the first cooling cover and the second cooling cover.

[0012] Further optimizing the technical solution, the auxiliary docking mechanism includes a positioning block, a first spring, a fixed disk, a positioning slot, a release plate and a movable block; The positioning block is arranged above the first connecting seat and the second connecting seat to form an up and down sliding structure therewith, and the inner side of the positioning block is designed in an inclined structure; A first spring is fixed below the positioning block to provide an upward thrust for the positioning block; A fixed plate is fixed on the surface of the injector body, and the fixed plate is located above the positioning block; The positioning groove is provided below the fixed plate, and a front-to-back sliding structure is formed between the positioning groove and the positioning block; a release plate, arranged inside the positioning groove; The movable block is arranged above the fixed disk, and the movable block is connected to the release plate to control the movement of the release plate.

[0013] To further optimize the technical solution, a docking and communication mechanism is provided between the first cooling cover and the second cooling cover, and an elastic sealing mechanism is provided at the connection between the first cooling cover and the second cooling cover.

[0014] Further optimizing the technical solution, the docking and connecting mechanism includes a connecting port, a blocking block, a second spring, a support frame and a trigger rod; The communication port is provided on the outside of the first liquid storage cavity and the second liquid storage cavity, and the communication port on the side of the first liquid storage cavity and the communication port on the side of the second liquid storage cavity are arranged opposite to each other; A blocking block is arranged on the inner side of the communicating port to block the communicating port; A second spring is connected to the blocking block to provide sealing thrust for the blocking block; A support frame is provided at the end of the second spring to provide support for the second spring; The trigger rod fixes the surfaces of any one of the two opposite groups of blocking blocks and pushes the blocking blocks to move.

[0015] Further optimizing the technical solution, the elastic sealing mechanism includes a sealing butt joint, a telescopic tube, a third spring and a butt joint; Sealing joint, outside of the communication port; a telescopic tube fixed between the sealing butt joint and the communication port; a third spring, arranged on the outside of the telescopic tube, to provide thrust for the sealing joint; The docking port is arranged at the outer end of the communication port opposite to the sealing docking port.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) In the present application, only the installation groove for providing the installation position of the cooling structure is provided on the injector body. The modification of the injector body is relatively small. The groove body can be directly added to the surface of the workpiece. The original production line can continue to be used, and the production difficulty is small. The first cooling cover and the second cooling cover are used to cool the injector body. The first cooling cover and the second cooling cover can change accordingly when the volume of the injector body changes, so as to maintain their fitting effect and keep the cooling stable.

[0017] (2) The first cooling cover and the second cooling cover can be detachably installed on the outside of the injector body. The injector body or the first cooling cover and the second cooling cover can be replaced and maintained separately later, which reduces the overall cost of the device and is more energy-saving and environmentally friendly.

[0018] (3) The flexible thermal pad can always be in close contact with the surface of the injector body through the squeezing effect of the inclined surface of the adjusting block. When the adjusting block expands due to heat, it can be pressed to move. When the temperature drops and shrinks, the adjusting block can extend, driving the first connecting seat to move, so that the first cooling cover and the second cooling cover are close to each other, so that the fit remains stable.

[0019] (4) The arrangement of the first cooling chamber and the second cooling chamber provides a wide range of cooling and heat absorption effects for the injector body, and the second cooling chamber is arranged in a split manner, so that subsequent coolant can circulate in the first cooling chamber and the second cooling chamber.

[0020] (5) The connecting port can be sealed by a sealing block, and after the first cooling cover and the second cooling cover are docked, the sealing block is pressed and moved, automatically opening the connecting port so that the coolant can circulate, and the connection between the sealed docking head and the docking port can also keep the docking point stably connected to prevent leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a bottom view structural schematic diagram of the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the fuel injector body of the present invention.

[0024] Figure 4 This is a schematic diagram of the top view of the first cooling cover of the present invention.

[0025] Figure 5 This is a side structural schematic diagram of the first cooling cover of the present invention.

[0026] Figure 6 This is a schematic side view of the second cooling cover of the present invention.

[0027] Figure 7 It is a schematic diagram of the side sectional structure of the plug-in block of the present invention.

[0028] Figure 8 This is a schematic diagram of the main cross-sectional structure of the fixed disk of the present invention.

[0029] Figure 9 It is a schematic side sectional structure diagram of the second cooling cover of the present invention.

[0030] Figure 10 This is a schematic side cross-sectional view of the connection structure between the first cooling cover and the second cooling cover of the present invention.

[0031] In the figure: 1. Injector body; 2. Nozzle; 3. Terminal block; 4. Mounting slot; 5. First cooling cover; 6. First connecting seat; 7. Second cooling cover; 8. Second connecting seat; 9. Flexible thermal pad; 10. Circulating fluid connector; 11. Plug-in block; 12. Connecting slot; 13. Adjustment block; 14. Strong spring; 15. Pull rope; 16. Control board; 17. Adjustment rod; 18. Guide shaft; 19. Positioning block; 20. First spring; 21. Fixed plate; 22. Positioning slot; 23. Release plate; 24. Movable block; 25. First liquid storage chamber; 26. Second liquid storage chamber; 27. Connecting port; 28. Blocking block; 29. ​​Second spring; 30. Support frame; 31. Trigger rod; 32. Sealing joint; 33. Telescopic tube; 34. Third spring; 35. Docking port. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] Embodiment 1: The present invention provides the following technical solution: an injector with a cooling mechanism, such as Figure 1-3 and Figure 9 As shown, it includes an injector body 1, an annular mounting groove 4 is opened on the outside of the injector body 1, and a first cooling cover 5 is attached to the outside of the mounting groove 4, and a second cooling cover 7 is provided on the front side of the first cooling cover 5, the first cooling cover 5 and the second cooling cover 7 are enclosed and installed on the outside of the mounting groove 4, and an elastic docking mechanism is provided on the outside of the first cooling cover 5 and the second cooling cover 7, and the first cooling cover 5 and the second cooling cover 7 are tightly attached to the outside of the mounting groove 4 through the elastic docking mechanism, and the inner sides of the first cooling cover 5 and the second cooling cover 7 are connected A flexible thermal pad 9 is provided, and the surface of the flexible thermal pad 9 and the mounting groove 4 are fitted together. A first liquid storage cavity 25 is provided inside the first cooling cover 5, and a second liquid storage cavity 26 is provided inside the second cooling cover 7. The second liquid storage cavity 26 is designed with an upper and lower partitioned structure, and the upper and lower sides of the second liquid storage cavity 26 are respectively connected to a circulating liquid connector 10 connected to an external circulating cooling pipeline. A nozzle 2 is provided below the injector body 1, and a sealing ring is provided at the connection between the nozzle 2 and the injector body 1, and a terminal block 3 is provided above the injector body 1.

[0034] The first cooling cover 5 and the second cooling cover 7 are installed on the outside of the injector body 1 through the installation groove 4. The first cooling cover 5 and the second cooling cover 7 are stably installed through the elastic docking mechanism. The two sets of circulating liquid connectors 10 on the outside of the second cooling cover 7 are respectively connected to the external cooling liquid inlet pipe and the liquid discharge pipe. The operating heat of the injector body 1 is conducted to the first liquid storage cavity 25 and the second liquid storage cavity 26 through the flexible thermal pad 9, thereby cooling the injector body 1.

[0035] Example 2: Based on Example 1, Figure 4-8As shown, the elastic docking mechanism further discloses that it includes a first connecting seat 6, a second connecting seat 8, a plug-in block 11, a connecting groove 12 and a pulling mechanism, the first connecting seat 6 is fixed on the left and right sides of the first cooling cover 5, the second connecting seat 8 is fixed on the left and right sides of the second cooling cover 7, the plug-in block 11 is fixed on the rear side of the second connecting seat 8, the connecting groove 12 is opened inside the first connecting seat 6, and a nested connection is formed between the plug-in block 11 and the connecting groove 12. The pulling mechanism is arranged inside the plug-in block 11 to control the connection between the plug-in block 11 and the connecting groove 12. The pulling mechanism includes an adjusting block 13, a strong spring 14 and an active control mechanism, and the adjusting block 13 , arranged on the upper and lower sides of the plug-in block 11, and the outer end of the adjusting block 13 is designed with an inclined structure. The strong spring 14 is fixed under the adjusting block 13 to provide thrust for the adjusting block 13. The adjusting block 13 moves to the outside of the first connecting seat 6 and squeezes the first connecting seat 6 under the action of the strong spring 14 to move it. The active control mechanism is arranged on the inside of the adjusting block 13 to control the contraction of the adjusting block 13. The active control mechanism includes a traction rope 15, a control board 16, an adjusting rod 17 and a guide shaft 18. The traction rope 15 is fixed at the inner end of the adjusting block 13, and the control board 16 is arranged inside the plug-in block 11 and between the plug-in block 11 to form a forward and backward sliding Structure, and the control panel 16 and the traction rope 15 are fixedly connected, the adjusting rod 17 is rotatably mounted on the front side of the control panel 16, and the front end of the adjusting rod 17 passes through the front surface of the second connecting seat 8 and the second connecting seat 8 to form a threaded connection, the guide shaft 18 is arranged on the outside of the traction rope 15 to guide the direction of the traction rope 15, and an auxiliary docking mechanism is provided above the first connecting seat 6 and above the second connecting seat 8 to position the installation of the first cooling cover 5 and the second cooling cover 7. The auxiliary docking mechanism includes a positioning block 19, a first spring 20, a fixed disk 21, a positioning groove 22, a release plate 23 and a movable block 24. The positioning block 19 is set Above the first connecting seat 6 and the second connecting seat 8, an up and down sliding structure is formed therewith, and the inner side of the positioning block 19 is designed with an inclined structure. The first spring 20 is fixed below the positioning block 19 to provide an upward thrust for the positioning block 19. The fixed disk 21 is fixed to the surface of the injector body 1, and the fixed disk 21 is located above the positioning block 19. The positioning groove 22 is opened below the fixed disk 21, and a front and rear sliding structure is formed between the positioning groove 22 and the positioning block 19. The release plate 23 is arranged inside the positioning groove 22. The movable block 24 is arranged above the fixed disk 21, and the movable block 24 and the release plate 23 are connected to control the movement of the release plate 23.

[0036] When installing the first cooling cover 5 and the second cooling cover 7, the first cooling cover 5 or the second cooling cover 7 can be installed to the outside of the installation groove 4. Before installation, first rotate the adjusting rod 17 to drive the control board 16 to move. The control board 16 pulls the adjusting block 13 to move through the traction rope 15. When the adjusting block 13 is retracted, the first cooling cover 5 is installed to the outside of the installation groove 4. The positioning block 19 is compressed and contracted. The positioning block 19 moves to the bottom of the positioning groove 22 and then extends again to connect with the positioning groove 22 to complete the positioning of the first cooling cover 5. Then, the second cooling cover 7 is installed. After installation, the plug-in block 11 passes through the connecting groove 12. At this time, it can be rotated. The adjusting rod 17 releases the pulling of the traction rope 15 by the control panel 16, and the strong spring 14 pushes the adjusting block 13 to move. The adjusting block 13 squeezes the first connecting seat 6 to move it, and the second cooling cover 7 and the first cooling cover 5 are close to each other. When the volume of the subsequent injector body 1 changes, the first cooling cover 5 and the second cooling cover 7 move accordingly. The adjusting block 13 is telescopically moved under the action of the strong spring 14 to adapt to the change in the spacing between them to keep it in close contact. When disassembling later, the adjusting block 13 can be retracted first, and then the movable block 24 can be pressed to push the positioning block 19 out of the positioning groove 22 through the release plate 23, and the first cooling cover 5 and the second cooling cover 7 can be removed.

[0037] Example 3: Based on Example 1, Figure 5-6 and Figure 10 As shown, it is further disclosed that a docking communication mechanism is provided between the first cooling cover 5 and the second cooling cover 7, and an elastic sealing mechanism is provided at the connection between the first cooling cover 5 and the second cooling cover 7. The docking communication mechanism includes a communication port 27, a blocking block 28, a second spring 29, a support frame 30 and a trigger rod 31. The communication port 27 is opened on the outside of the first liquid storage chamber 25 and the second liquid storage chamber 26, and the communication port 27 on the side of the first liquid storage chamber 25 and the communication port 27 on the side of the second liquid storage chamber 26 are arranged relative to each other. The blocking block 28 is provided on the inner side of the communication port 27 to block the communication port 27. The second spring 29 is connected to the blocking block 28 to seal. The blocking block 28 provides sealing thrust, the support frame 30 is arranged at the end of the second spring 29 to provide support for the second spring 29, the trigger rod 31 is fixed to any one surface of the two opposite groups of blocking blocks 28, and pushes the blocking block 28 to move. The elastic sealing mechanism includes a sealing butt joint 32, a telescopic tube 33, a third spring 34 and a docking port 35. The sealing butt joint 32 is on the outside of the connecting port 27, the telescopic tube 33 is fixed between the sealing butt joint 32 and the connecting port 27, the third spring 34 is arranged on the outside of the telescopic tube 33 to provide thrust for the sealing butt joint 32, and the docking port 35 is opened at the outer end of the connecting port 27 opposite to the sealing butt joint 32.

[0038] When the first cooling cover 5 and the second cooling cover 7 are not docked, the blocking block 28 blocks the connecting port 27. After docking, the trigger rod 31 pushes the blocking block 28 to open the connecting port 27, so that the first liquid storage chamber 25 and the second liquid storage chamber 26 are connected. During docking, the sealing docking joint 32 is inserted into the docking port 35 to seal the docking joint. When the distance between the first cooling cover 5 and the second cooling cover 7 changes, the sealing docking joint 32 can maintain stable docking with the docking port 35 under the action of the third spring 34 and the telescopic tube 33 to prevent leakage at the docking joint.

[0039] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "dispose," "install," and other conjunctions should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fuel injector with a cooling mechanism, comprising a fuel injector body (1); Its characteristics are: The outer side of the injector body (1) is provided with an annular mounting groove (4), and the outer side of the mounting groove (4) is fitted with a first cooling cover (5), and the front side of the first cooling cover (5) is provided with a second cooling cover (7), the first cooling cover (5) and the second cooling cover (7) are enclosed and mounted on the outer side of the mounting groove (4), and the outer sides of the first cooling cover (5) and the second cooling cover (7) are provided with an elastic docking mechanism, and the first cooling cover (5) and the second cooling cover (7) are tightly fitted on the mounting groove (4) through the elastic docking mechanism. The outer side, and the inner sides of the first cooling cover (5) and the second cooling cover (7) are connected with a flexible thermal pad (9), the flexible thermal pad (9) and the surface of the mounting groove (4) are in contact, the interior of the first cooling cover (5) is provided with a first liquid storage cavity (25), the interior of the second cooling cover (7) is provided with a second liquid storage cavity (26), and the second liquid storage cavity (26) is designed as an upper and lower partitioned structure, and the upper and lower sides of the second liquid storage cavity (26) are respectively connected with a circulating liquid connector (10) connected to an external circulating cooling pipeline.

2. The fuel injector with a cooling mechanism according to claim 1, characterized in that: A nozzle (2) is provided below the fuel injector body (1), a sealing ring is provided at the connection between the nozzle (2) and the fuel injector body (1), and a wiring seat (3) is provided above the fuel injector body (1).

3. The fuel injector with a cooling mechanism according to claim 1, characterized in that: The elastic docking mechanism comprises a first connecting seat (6), a second connecting seat (8), a plug-in block (11), a connecting groove (12) and a pulling mechanism; A first connecting seat (6) is fixed on the left and right sides of the first cooling cover (5); A second connecting seat (8) is fixed on the left and right sides of the second cooling cover (7); A plug-in block (11) is fixed to the rear side of the second connecting seat (8); A connecting groove (12) is provided inside the first connecting seat (6), and a nested connection is formed between the plug-in block (11) and the connecting groove (12); The pulling mechanism is arranged inside the plug-in block (11) and controls the connection between the plug-in block (11) and the connection groove (12).

4. The fuel injector with a cooling mechanism according to claim 3, characterized in that: The pulling mechanism comprises an adjustment block (13), a strong spring (14) and an active control mechanism; The adjusting block (13) is arranged on the upper and lower sides of the plug-in block (11), and the outer end of the adjusting block (13) is designed to be inclined; A strong spring (14) is fixed below the regulating block (13) to provide thrust for the regulating block (13). When the regulating block (13) moves to the outside of the first connecting seat (6), the strong spring (14) squeezes the first connecting seat (6) to move the regulating block (13). An active control mechanism is arranged on the inner side of the regulating block (13) to control the contraction of the regulating block (13).

5. The fuel injector with a cooling mechanism according to claim 4, characterized in that: The active control mechanism comprises a traction rope (15), a control panel (16), an adjustment rod (17) and a guide shaft (18); A traction rope (15) is fixed to the inner end of the adjustment block (13); A control panel (16) is arranged inside the plug-in block (11) and between the plug-in block (11) to form a front-rear sliding structure, and the control panel (16) and the traction rope (15) are fixedly connected; An adjusting rod (17) is rotatably mounted on the front side of the control panel (16), and a front end of the adjusting rod (17) passes through the front side surface of the second connecting seat (8) and forms a threaded connection between the second connecting seat (8); A guide shaft (18) is arranged outside the traction rope (15) to guide the direction of the traction rope (15).

6. The fuel injector with a cooling mechanism according to claim 5, characterized in that: Auxiliary docking mechanisms are provided above the first connecting seat (6) and above the second connecting seat (8) to position the installation of the first cooling cover (5) and the second cooling cover (7).

7. The fuel injector with a cooling mechanism according to claim 6, characterized in that: The auxiliary docking mechanism comprises a positioning block (19), a first spring (20), a fixed plate (21), a positioning groove (22), a release plate (23) and a movable block (24); A positioning block (19) is arranged above the first connecting seat (6) and the second connecting seat (8) to form an up-and-down sliding structure therewith, and the inner side of the positioning block (19) is designed to be inclined; A first spring (20) is fixed below the positioning block (19) to provide an upward thrust for the positioning block (19); A fixed plate (21) is fixed to the surface of the injector body (1), and the fixed plate (21) is located above the positioning block (19); A positioning groove (22) is provided below the fixed plate (21), and a front-to-back sliding structure is formed between the positioning groove (22) and the positioning block (19); A release plate (23) is disposed inside the positioning groove (22); The movable block (24) is arranged above the fixed plate (21), and the movable block (24) is connected to the release plate (23) to control the movement of the release plate (23).

8. The fuel injector with a cooling mechanism according to claim 1, characterized in that: A docking communication mechanism is provided between the first cooling cover (5) and the second cooling cover (7), and an elastic sealing mechanism is provided at the connection between the first cooling cover (5) and the second cooling cover (7).

9. The fuel injector with a cooling mechanism according to claim 8, characterized in that: The docking communication mechanism comprises a communication port (27), a blocking block (28), a second spring (29), a support frame (30) and a trigger rod (31); The communication opening (27) is provided on the outside of the first liquid storage cavity (25) and the second liquid storage cavity (26), and the communication opening (27) on the side of the first liquid storage cavity (25) and the communication opening (27) on the side of the second liquid storage cavity (26) are arranged opposite to each other; A blocking block (28) is provided on the inner side of the communication opening (27) to block the communication opening (27); A second spring (29) is connected to the blocking block (28) to provide a sealing thrust for the blocking block (28); A support frame (30) is provided at the end of the second spring (29) to provide support for the second spring (29); The trigger rod (31) is fixed to any one surface of the two opposite groups of blocking blocks (28) to push the blocking blocks (28) to move.

10. The fuel injector with a cooling mechanism according to claim 9, characterized in that: The elastic sealing mechanism comprises a sealing butt joint (32), a telescopic tube (33), a third spring (34) and a butt joint (35); A sealing joint (32) is connected to the outside of the opening (27); A telescopic tube (33) is fixed between the sealing joint (32) and the communication port (27); A third spring (34) is provided on the outside of the telescopic tube (33) to provide thrust for the sealing joint (32); The docking port (35) is provided at the outer end of the communication port (27) opposite to the sealing docking port (32).

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