A multifunctional dual-fuel low-speed diesel engine fuel injection valve

Abstract

The utility model relates to the field of diesel engine fuel injection valves, and in particular to a multifunctional dual-fuel low-speed diesel engine fuel injection valve. The multifunctional dual-fuel low-speed diesel engine fuel injection valve includes a check valve, a top cover, a valve seat, a nozzle, a limiting structure and an anti-skid structure. The check valve is located at the top and is used for high-pressure fuel inlet. The top cover is located below the check valve to enhance the stability of the lift. The valve seat is located below the top cover and is used to control the high-pressure hydraulic oil inlet of the thrust block stroke. The nozzle is located at the lower part of the valve seat and is used to control the injection of high-pressure fuel. A limiting structure is provided between the nozzle and the valve seat, and the nozzle is quickly disassembled and assembled through the limiting structure. An anti-skid mechanism is provided on the top cover, and the anti-skid structure is used to limit the loosening of the top cover when in use. The utility model can quickly disassemble and assemble the nozzle through the designed limiting structure, which greatly improves the convenience of repairing and replacing the nozzle, reduces downtime, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of diesel engine fuel injection valves, and in particular to a multifunctional dual-fuel low-speed diesel engine fuel injection valve. Background Art

[0002] With the improvement of environmental protection awareness and the adjustment of energy structure, dual-fuel low-speed diesel engines have attracted widespread attention because of their ability to flexibly switch between different fuels, reduce environmental pollution and reduce operating costs. However, in the fuel injection system of dual-fuel low-speed diesel engines, the fuel injection valve is a key component, and its design complexity and functionality have a vital impact on the overall performance of the diesel engine.

[0003] Traditional fuel injection valves are mostly single-function designs, that is, they can only meet the injection requirements of a single fuel. In dual-fuel low-speed diesel engines, since the injection requirements of both fuel oil and gas need to be met at the same time, traditional fuel injection valves cannot meet their complex working conditions. In addition, with the advancement of diesel engine technology and increasingly stringent emission regulations, the requirements for the response time, injection accuracy, stability, etc. of fuel injection valves are becoming increasingly higher.

[0004] Therefore, it is particularly important to develop a multifunctional fuel injection valve that can adapt to the complex working conditions of dual-fuel low-speed diesel engines and has high precision, high stability and fast response capabilities; this fuel injection valve not only needs to be able to accurately control the injection amount, injection time and injection pressure of fuel and gas, but also needs to be easy to disassemble and maintain, so as to ensure the stable and efficient operation of the diesel engine.

[0005] Therefore, it is necessary to provide a new multifunctional dual-fuel low-speed diesel engine fuel injection valve to solve the above-mentioned technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a multifunctional dual-fuel low-speed diesel engine fuel injection valve.

[0007] The multifunctional dual-fuel low-speed diesel engine fuel injection valve provided by the present invention comprises: a check valve, a top cover, a valve seat, a nozzle, a limiting structure and an anti-skid structure. The check valve is located at the top and is used for high-pressure fuel inlet. The top cover is located below the check valve to enhance the lifting stability. The valve seat is located below the top cover and is used for controlling the high-pressure hydraulic oil inlet of the thrust block stroke. The nozzle is located below the valve seat and is used to control the injection of high-pressure fuel. A limiting structure is provided between the nozzle and the valve seat, and the nozzle is quickly disassembled and assembled through the limiting structure. The top cover is provided with an anti-skid structure, and the anti-skid structure is used to limit the top cover from loosening when in use.

[0008] Preferably, the limiting structure includes: a connecting pipe, one end of the valve seat is fixedly connected to the connecting pipe, one side of the connecting pipe is provided with a slot, and the connecting pipe is of conical design, the interior of the nozzle is of hollow design, a spring is fixedly connected to the interior of the nozzle, the inner wall of the nozzle is slidably connected to a limit unlocking ring, the inner ring of the limit unlocking ring is an L-shaped structure, the inner wall of the nozzle is equidistantly provided with connecting holes, a limiting ball is provided between the connecting hole and the L-shaped structure, the L-shaped structure is divided into a vertical surface and an inclined surface, a number of limiting balls are in contact with the inclined surface of the L-shaped structure, a number of limiting balls are engaged with the slot, a number of limiting balls are in contact with the vertical surface of the L-shaped structure, a number of limiting balls are not squeezed, a number of limiting balls are not engaged with the slot, sliding grooves are equidistantly provided in the hollow part of the nozzle, connecting blocks are equidistantly fixedly connected to the outer wall of the limit unlocking ring, and connecting rings are fixedly connected to the outsides of a number of connecting blocks.

[0009] Preferably, the anti-slip structure includes: a bolt, through holes symmetrically opened at both ends of the top cover, the through holes are sleeved on the bolts, and an anti-slip connecting ring 1 is rotatably connected to one side of the top cover, a protective connecting ring 2 is provided at the top of the anti-slip connecting ring 1, a locking tooth 1 is opened at the top of the anti-slip connecting ring 1, and a locking tooth 2 is opened at the bottom of the protective connecting ring 2, the locking tooth 1 is engaged with the locking tooth 2, and a nut is threadedly connected to the outer wall of the bolt.

[0010] Preferably, the check valve is made of high-strength corrosion-resistant material to ensure good sealing and durability during the high-pressure fuel intake process.

[0011] Preferably, a heat dissipation structure is provided inside the top cover to improve the heat dissipation performance of the fuel injection valve when operating under high load and ensure stable operation of the valve body.

[0012] Preferably, a temperature sensing device is provided inside the nozzle, which can monitor the temperature inside the nozzle in real time, and feed back the temperature data to the control system of the diesel engine, so that timely adjustment measures can be taken when the temperature is abnormal. A temperature sensing device is provided inside the nozzle, which can monitor the temperature inside the nozzle in real time, and feed back the temperature data to the control system of the diesel engine, so that timely adjustment measures can be taken when the temperature is abnormal.

[0013] Preferably, the fuel injection valve further includes a pressure sensor for detecting the pressure of the high-pressure fuel and the control oil, and transmitting the pressure data to the control system of the diesel engine to achieve precise fuel injection control.

[0014] Preferably, the injection hole of the nozzle is specially designed to form an ideal fuel spray pattern to improve the combustion efficiency of the fuel and reduce emissions.

[0015] Compared with the related art, the multifunctional dual-fuel low-speed diesel engine fuel injection valve provided by the present invention has the following beneficial effects:

[0016] Efficient disassembly and replacement: The designed limit structure allows the nozzle to be quickly disassembled and installed, greatly improving the convenience of repairing and replacing the nozzle, reducing downtime and improving work efficiency.

[0017] Anti-skid and stable: The anti-skid structure design effectively prevents the top cover from loosening during use through the locking teeth engagement of the anti-skid connecting ring 1 and the protective connecting ring 2, ensuring the stability and safety of the fuel injection valve.

[0018] Corrosion resistance and durability: The check valve is made of high-strength corrosion-resistant material, which can maintain good sealing and durability during the high-pressure fuel intake process, extending the service life of the fuel injection valve.

[0019] Improved heat dissipation performance: A heat dissipation structure is provided inside the top cover, which improves the heat dissipation performance of the fuel injection valve when running under high load, effectively prevents overheating and ensures the stable operation of the valve body.

[0020] Temperature monitoring and protection: A temperature sensing device is installed inside the nozzle, which can monitor the temperature inside the nozzle in real time and feed back to the control system of the diesel engine, providing data support for timely adjustment measures and effectively preventing equipment damage caused by excessive temperature.

[0021] Precise fuel injection control: Through the integrated pressure sensor, it can detect the pressure of high-pressure fuel and control oil, and transmit the data to the diesel engine control system, realizing precise fuel injection control, improving fuel combustion efficiency and diesel engine performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a multifunctional dual-fuel low-speed diesel engine fuel injection valve provided by the present invention;

[0023] Figure 2 for Figure 1 The structural schematic diagram of the bottom of the valve seat shown;

[0024] Figure 3 for Figure 1 One of the schematic diagrams of the structure of the nozzle shown;

[0025] Figure 4 for Figure 1 The second schematic diagram of the structure of the nozzle shown;

[0026] Figure 5 for Figure 1 The structural schematic diagram of the anti-slip connecting ring 1 is shown.

[0027] Numbers in the figure: 1. check valve; 2. top cover; 3. valve seat; 4. nozzle; 5. limiting structure; 6. anti-slip structure; 51. connecting pipe; 52. slot; 53. spring; 54. limiting unlocking ring; 55. L-shaped structure; 56. connecting hole; 57. limiting ball; 58. slide groove; 59. connecting block; 510. connecting ring; 61. nut; 62. bolt; 63. anti-slip connecting ring 1; 64. protective connecting ring 2; 65. locking tooth 1; 66. locking tooth 2. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] See also Figure 1-5 A multifunctional dual-fuel low-speed diesel engine fuel injection valve, the multifunctional dual-fuel low-speed diesel engine fuel injection valve comprises: a check valve 1, a top cover 2, a valve seat 3, a nozzle 4, a limiting structure 5 and an anti-skid structure 6, the check valve 1 is located at the top and is used for high-pressure fuel inlet, the top cover 2 is located below the check valve 1 to enhance the lifting stability, the valve seat 3 is located below the top cover 2 and is used for controlling the high-pressure hydraulic oil and control oil of the thrust block stroke inlet, the nozzle 4 is located at the lower part of the valve seat 3 and is used to control the injection of high-pressure fuel, a limiting structure 5 is provided between the nozzle 4 and the valve seat 3, the nozzle 4 is quickly disassembled and assembled through the limiting structure 5, the top cover 2 is provided with an anti-skid structure 6, the anti-skid structure The structure 6 is used to limit the loosening of the top cover 2 during use. The check valve 1 is made of high-strength corrosion-resistant material to ensure good sealing and durability during the high-pressure fuel intake process. A heat dissipation structure is provided inside the top cover 2 to improve the heat dissipation performance of the fuel injection valve when running under high load and ensure the stable operation of the valve body. The fuel injection valve also includes a pressure sensor for detecting the pressure of the high-pressure fuel and control oil, and transmitting the pressure data to the control system of the diesel engine to achieve precise fuel injection control. The injection hole of the nozzle 4 is specially designed to form an ideal fuel spray pattern to improve the combustion efficiency of the fuel and reduce emissions.

[0031] See also Figure 2-4The limiting structure 5 includes: a connecting pipe 51, one end of the valve seat 3 is fixedly connected to the connecting pipe 51, one side of the connecting pipe 51 is provided with a slot 52, and the connecting pipe 51 is designed to be conical, the inside of the nozzle 4 is designed to be hollow, a spring 53 is fixedly connected to the inside of the nozzle 4, the inner wall of the nozzle 4 is slidably connected to a limiting unlocking ring 54, the inner circle of the limiting unlocking ring 54 is an L-shaped structure 55, the inner wall of the nozzle 4 is equidistantly provided with connecting holes 56, and a limiting ball 57 is provided between the connecting hole 56 and the L-shaped structure 55. The L-shaped structure 55 is divided into a vertical surface and an inclined surface, a number of limiting balls 57 are in contact with the inclined surface of the L-shaped structure 55, a number of limiting balls 57 are engaged with the slot 52, a number of limiting balls 57 are in contact with the vertical surface of the L-shaped structure 55, a number of limiting balls 57 are not squeezed, a number of limiting balls 57 are not engaged with the slot 52, sliding grooves 58 are equidistantly provided in the hollow part inside the nozzle 4, connecting blocks 59 are equidistantly fixedly connected to the outer wall of the limiting unlocking ring 54, and connecting rings 510 are fixedly connected to the outer sides of a number of connecting blocks 59.

[0032] See also Figure 1 and Figure 5 The anti-slip structure 6 includes: a bolt 62, through holes are symmetrically opened at both ends of the top cover 2, the through holes are sleeved on the bolt 62, and an anti-slip connecting ring 1 63 is rotatably connected to one side of the top cover 2, a protective connecting ring 2 64 is provided on the top of the anti-slip connecting ring 1 63, a locking tooth 1 65 is opened on the top of the anti-slip connecting ring 1 63, and a locking tooth 2 66 is opened on the bottom of the protective connecting ring 2 64, the locking tooth 1 65 is engaged with the locking tooth 2 66, and a nut 61 is threadedly connected to the outer wall of the bolt 62.

[0033] The working principle of the multifunctional dual-fuel low-speed diesel engine fuel injection valve provided by the present invention is as follows:

[0034] 1. The overall working principle of the fuel injection valve:

[0035] The check valve 1 is located at the top, and its main function is to prevent the high-pressure fuel from flowing back and ensure the stability and safety of the fuel injection process. The check valve is made of high-strength corrosion-resistant material and has good sealing and durability.

[0036] The top cover 2 is located below the check valve, which not only enhances the stability of the valve body, but also has a heat dissipation structure inside to improve the heat dissipation performance of the fuel injection valve when running at high load.

[0037] The valve seat 3 is located below the top cover and is used to control the high-pressure hydraulic oil control oil inlet for controlling the stroke of the thrust block. The high-pressure hydraulic oil controls the action of the nozzle 4 through the valve seat, thereby controlling the injection of fuel.

[0038] The nozzle 4 is located at the bottom of the valve seat and is the outlet for fuel injection. A temperature sensing device is installed inside the nozzle to monitor the temperature inside the nozzle in real time and feed back the temperature data to the control system of the diesel engine. The injection hole of the nozzle is specially designed to form an ideal fuel spray pattern.

[0039] 2. Working principle of limiting structure 5:

[0040] The limiting structure 5 is used for quick disassembly and assembly of the nozzle 4. When the nozzle needs to be disassembled, the limiting unlocking ring 54 is moved to disengage the limiting ball 57 from the clamping state with the clamping groove 52, and then the nozzle is pulled out of the connecting tube 51. When installing, the nozzle is inserted into the connecting tube, and the limiting ball is automatically clamped with the clamping groove under the action of the spring 53, so that the nozzle is quickly fixed.

[0041] 3. Working principle of anti-slip structure 6:

[0042] The anti-skid structure 6 prevents the top cover 2 from loosening during use by engaging the locking teeth of the anti-skid connection ring 1 63 and the protective connection ring 2 64. When the anti-skid connection ring 1 or the protective connection ring 2 is rotated, the locking teeth 1 65 and the locking teeth 2 66 engage with each other, and the top cover is fixed to the valve body through the tightening action of the bolts 62 and the nuts 67.

[0043] 4. Precise fuel injection control:

[0044] Through the integrated pressure sensor, the fuel injection valve can detect the pressure of high-pressure fuel and control oil, and transmit the pressure data to the diesel engine control system. The control system accurately controls the opening and closing time of the nozzle and the injection amount of fuel according to the pressure data and other related parameters, achieving precise fuel injection control.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multifunctional dual-fuel low-speed diesel engine fuel injection valve, characterized in that: include: Check valve (1), the check valve (1) is located at the top and is used for high-pressure fuel inlet; A top cover (2), the top cover (2) being located below the check valve (1); A valve seat (3), the valve seat (3) is located below the top cover (2) and is used for controlling the high-pressure hydraulic oil and control oil inlet of the thrust block stroke; A nozzle (4), the nozzle (4) is located below the valve seat (3) and is used to control the injection of high-pressure fuel; A limiting structure (5), wherein the limiting structure (5) is provided between the nozzle (4) and the valve seat (3), and the nozzle (4) can be quickly disassembled and assembled through the limiting structure (5); An anti-skid structure (6) is provided on the top cover (2), and the anti-skid structure (6) is used to prevent the top cover (2) from loosening during use.

2. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: The limiting structure (5) comprises: a connecting pipe (51), one end of the valve seat (3) is fixedly connected to the connecting pipe (51), one side of the connecting pipe (51) is provided with a clamping groove (52), and the connecting pipe (51) is designed to be conical, the inside of the nozzle (4) is designed to be hollow, a spring (53) is fixedly connected to the inside of the nozzle (4), a limiting unlocking ring (54) is slidably connected to the inner wall of the nozzle (4), the inner ring of the limiting unlocking ring (54) is in an L-shaped structure (55), the inner wall of the nozzle (4) is provided with connecting holes (56) at equal intervals, and a limiting ball (55) is provided between the connecting hole (56) and the L-shaped structure (55). 7), the L-shaped structure (55) is divided into a vertical surface and an inclined surface, a plurality of limiting balls (57) are in contact with the inclined surface of the L-shaped structure (55), a plurality of limiting balls (57) are engaged with the clamping groove (52), a plurality of limiting balls (57) are in contact with the vertical surface of the L-shaped structure (55), a plurality of limiting balls (57) are not squeezed, a plurality of limiting balls (57) are not engaged with the clamping groove (52), sliding grooves (58) are equidistantly provided in the hollow portion inside the nozzle (4), connecting blocks (59) are equidistantly fixedly connected to the outer wall of the limiting unlocking ring (54), and connecting rings (510) are fixedly connected to the outer sides of a plurality of connecting blocks (59).

3. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: The anti-skid structure (6) comprises: a bolt (62); through holes are symmetrically provided at both ends of the top cover (2); the through holes are sleeved on the bolt (62); and an anti-skid connecting ring (63) is rotatably connected to one side of the top cover (2); a protective connecting ring (64) is provided at the top of the anti-skid connecting ring (63); a locking tooth (65) is provided at the top of the anti-skid connecting ring (63); a locking tooth (66) is provided at the bottom of the protective connecting ring (64); the locking tooth (65) is engaged with the locking tooth (66); and a nut (61) is threadedly connected to the outer wall of the bolt (62).

4. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: The check valve (1) is made of high-strength corrosion-resistant material.

5. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: A heat dissipation structure is arranged inside the top cover (2) to improve the heat dissipation performance of the fuel injection valve when it is running at high load.

6. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: A temperature sensing device is arranged inside the nozzle (4), which can monitor the temperature inside the nozzle in real time and feed back the temperature data to the control system of the diesel engine.

7. The multifunctional dual-fuel low-speed diesel engine fuel injection valve according to claim 1, characterized in that: The fuel injection valve also includes a pressure sensor for detecting the pressure of the high-pressure fuel and the control oil.

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