Durable sealing structure applied to methanol nozzle
By using laser welded valve core plug and valve seat sealing structure in methanol nozzles, and filling the gap at the connection of the insert with the rubber inflation coil, the problem of poor sealing properties of methanol nozzles is solved, and the fuel sealing properties and stability of the insert connection are improved.
Patent Information
- Application Number
- CN202422355205.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-11
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The existing methanol nozzle sealing durability structure is prone to poor sealing when used, resulting in excessive emissions or increased fuel consumption, and gaps are prone to occur at the connection of the inserts, resulting in short circuits or falling off.
The valve core body of the methanol nozzle and the valve core plug are laser welded together, and the spring is combined with the valve seat cone surface to form a seal. In addition, a rubber inflatable coil is used to fill the gap at the connection of the insert to ensure sealing.
The methanol nozzle is fully sealed in the absence of electrical excitation, avoiding fuel leakage and safety hazards, and improving the stability and sealing durability of the insert connection.
Smart Images
Figure CN222976937U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of methanol nozzles, and more specifically, to a sealing and durability structure applied to methanol nozzles. Background Technique
[0002] A methanol nozzle is a device used to introduce methanol fuel into the combustion chamber of an internal combustion engine. Methanol is a renewable and clean fuel, which is widely used in some special internal combustion engines, generators, and experimental vehicles. The methanol nozzle plays a key role in introducing methanol, and the methanol nozzle is used to ensure efficient, stable, and clean combustion in internal combustion engines using methanol fuel.
[0003] However, most of the existing sealing and durability structures applied to methanol nozzles have the following problems:
[0004] For the existing sealing and durability structure applied to methanol nozzles, during use, most calculate the fuel demand based on the engine speed, throttle position, intake air temperature, etc. Based on these calculations, the ECU generates a pulse signal to control the opening and closing state and injection duration of the injector. Its electrical excitation signal has a slow response, and the pulse signal has poor followability, which easily leads to problems such as poor sealing, resulting in problems such as excessive emissions or increased fuel consumption; at the same time, when connecting the excitation pulse of the electronic control unit with the insert piece, gaps easily appear at the insert piece connection, and it is easy to continuously have an insecure connection during use, resulting in problems such as short circuits or detachment, and the generated gaps easily cause the entry of surrounding humid gases, resulting in short circuit problems, and it is inconvenient to use for full sealing.
[0005] Therefore, we make improvements in this regard and propose a sealing and durability structure applied to methanol nozzles. Content of the Utility Model
[0006] The purpose of the utility model is to address the current problems of easy occurrence of poor sealing and inconvenient full sealing use.
[0007] To achieve the above purpose, the utility model provides the following technical solutions:
[0008] A sealing and durability structure applied to methanol nozzles to improve the above problems.
[0009] Specifically, this application is as follows:
[0010] It includes an alcohol inlet pipe and a filter screen. A filter screen is installed inside the alcohol inlet pipe. A pipe core is installed on the alcohol inlet pipe. An end cap is arranged on the pipe core. A spring is installed inside the pipe core. A spacer ring is installed on the pipe core. A valve core body is arranged below the pipe core. A valve seat is installed on the valve core body. A valve core plug is arranged inside the valve seat. An O-ring is installed on the valve seat. A valve cover is installed on the valve seat. A guide sleeve is installed on the valve seat. A shell is installed on the guide sleeve. A coil is installed inside the shell. A retaining pin is arranged inside the pipe core. A plug is installed inside the shell. A hole plate is installed on the valve cover. Spray holes are opened on the hole plate. A first hole is opened on the valve core body. A second hole is opened on the valve core body. A first cavity is opened inside the valve seat. A second cavity is opened below the valve core plug. A conveying groove is opened inside the shell. A threaded rod is threadedly connected to the shell. A piston plate is rotatably connected to the threaded rod. A guide rod is fixedly connected to the piston plate. A conveying pipe is installed on the shell.
[0011] As a preferred technical solution of the present application, the outer side surface of the filter screen fits with the inner side surface of the alcohol inlet pipe, and the bottom end surface height of the valve core plug is greater than the top end surface of the hole plate.
[0012] As a preferred technical solution of the present application, the spray holes are opened on the hole plate at equal angles, and the center lines of the first hole and the second hole are on the same horizontal line.
[0013] As a preferred technical solution of the present application, the threaded rod is rotatably connected to the central part on one side of the piston plate, and the side end surface of the piston plate fits with the inner side surface of the conveying groove.
[0014] As a preferred technical solution of the present application, a rubber inflation ring is fixedly connected to the conveying pipe, the rubber inflation ring is fixedly connected inside the shell, and the guide rods are symmetrically distributed on the left and right sides of the piston plate.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] In the solution of the present application:
[0017] 1. By providing the valve core plug, when there is no electrical excitation, the valve core plug used by the device, the valve core body and the valve core plug are integrally welded by laser. Under the action of the spring, it cooperates with the conical surface of the valve seat to form a seal. In addition, the O-ring installed on the valve seat cooperates with the valve cover to form an overall sealed state. The liquid fuel reaches the first cavity above the valve seat from the alcohol inlet pipe through the filter screen, pipe core, retaining pin, spring, first hole and second hole of the valve core body. Since the valve core plug and the valve seat form a seal, the liquid fuel cannot reach the spray holes of the hole plate, which can provide sufficient sealing protection, avoid fuel leakage during non-use, causing potential safety hazards, and can also prevent waste and environmental pollution problems.
[0018] 2. By means of the provided rubber inflatable ring, when applying an excitation pulse to the electronic control unit through the connecting insert, in order to avoid the occurrence of gaps beside the connecting insert, which may lead to detachment or moisture ingress, the threaded rod can be rotated. The threaded rod pushes the piston plate to move. When the piston plate moves, it can be supported and move smoothly through the guide rods on both sides. When the piston plate moves, it can push the gas in the conveying groove and transport it through the conveying pipe into the rubber inflatable ring. Through the inflation and swelling of the rubber inflatable ring, the gaps around the insert can be filled, preventing moisture and other substances from entering the generated gaps and causing safety hazards such as short circuits. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 FIG. 6 is an overall three-dimensional structural schematic diagram of the methanol nozzle sealing durability structure provided by the present application;
[0020] Figure 2 FIG. 7 is a side view structural schematic diagram of the housing of the methanol nozzle sealing durability structure provided by the present application;
[0021] Figure 3 FIG. 8 is a bottom view structural schematic diagram of the orifice plate of the methanol nozzle sealing durability structure provided by the present application;
[0022] Figure 4 FIG. 9 is a side view structural schematic diagram of the first hole of the methanol nozzle sealing durability structure provided by the present application;
[0023] Figure 5 FIG. 10 is a top view structural schematic diagram of the rubber inflatable ring of the methanol nozzle sealing durability structure provided by the present application.
[0024] Reference numerals in the figures: 1, methanol inlet pipe; 2, filter screen; 3, pipe core; 4, end cover; 5, spring; 6, spacer ring; 7, valve core body; 8, valve seat; 9, valve core plug; 10, O-ring; 11, valve cover; 12, guide sleeve; 13, housing; 14, coil; 15, retaining pin; 16, insert; 17, orifice plate; 18, spray hole; 19, first hole; 20, second hole; 21, first cavity; 22, second cavity; 23, conveying groove; 24, threaded rod; 25, piston plate; 26, guide rod; 27, conveying pipe; 28, rubber inflatable ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.
[0026] Accordingly, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the claimed present utility model, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.
[0028] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.
[0030] Embodiment 1:
[0031] As Figures 1-5 shown, this embodiment proposes a methanol nozzle sealing durability structure, including a methanol inlet pipe 1 and a filter screen 2. The filter screen 2 is installed inside the methanol inlet pipe 1. A pipe core 3 is installed on the methanol inlet pipe 1. An end cap 4 is arranged on the pipe core 3. A spring 5 is installed inside the pipe core 3. A spacer ring 6 is installed on the pipe core 3. A valve core body 7 is arranged below the pipe core 3. A valve seat 8 is installed on the valve core body 7. A valve core plug 9 is arranged inside the valve seat 8. An O-ring 10 is installed on the valve seat 8. A valve cover 11 is installed on the valve seat 8. A guide sleeve 12 is installed on the valve seat 8. A housing 13 is installed on the guide sleeve 12. A coil 14 is installed inside the housing 13. A retaining pin 15 is arranged inside the pipe core 3. A socket 16 is installed inside the housing 13. A hole plate 17 is installed on the valve cover 11. A spray hole 18 is opened on the hole plate 17. A first hole 19 is opened on the valve core body 7. A second hole 20 is opened on the valve core body 7. A first cavity 21 is opened inside the valve seat 8. A second cavity 22 is opened below the valve core plug 9. A conveying groove 23 is opened inside the housing 13. A threaded rod 24 is threadedly connected to the housing 13. A piston plate 25 is rotatably connected to the threaded rod 24. A guide rod 26 is fixedly connected to the piston plate 25. A conveying pipe 27 is installed on the housing 13.
[0032] Example 2:
[0033] The solution in Example 1 will be further introduced below in combination with the specific working mode, as described in detail below:
[0034] As Figure 2 shown, as a preferred implementation manner, on the basis of the above manner, further, the outer side surface of the filter screen 2 is attached to the inner side surface of the methanol inlet pipe 1, and the bottom end surface height of the valve core plug 9 is greater than the top end surface of the orifice plate 17 and is fixed, which can ensure that when fuel is transported through the methanol inlet pipe 1, the particulate impurities in the fuel can be fully filtered by the filter screen 2.
[0035] As Figure 3 shown, as a preferred implementation manner, on the basis of the above manner, further, the spray holes 18 are evenly arranged on the orifice plate 17, and the center line of the first hole 19 is on the same horizontal line as the center line of the second hole 20, which can ensure that the multiple spray holes 18 opened on the orifice plate 17 can evenly spray fuel for transportation.
[0036] As Figure 5 shown, as a preferred implementation manner, on the basis of the above manner, further, the threaded rod 24 is rotatably connected to the central part on one side of the piston plate 25, and the side end surface of the piston plate 25 is attached to the inner side surface of the conveying groove 23, which can ensure that when the piston plate 25 moves, it can be fully sealed through the attachment of the inner side surface of the conveying groove 23, and ensure that the gas in the conveying groove 23 can be pushed out for inflation when the piston plate 25 moves.
[0037] As Figure 5 shown, as a preferred implementation manner, on the basis of the above manner, further, a rubber inflation ring 28 is fixedly connected to the conveying pipe 27, the rubber inflation ring 28 is fixedly connected inside the housing 13, and the guide rods 26 are symmetrically distributed on the left and right sides of the piston plate 25, which can ensure that when the piston plate 25 moves, it can move smoothly through the support of the guide rods 26 on both sides, and avoid situations such as deviation and inclination of the piston plate 25 during movement.
[0038] Specifically, when this methanol nozzle sealing durability structure is in use: Combining Figures 1-5 , when there is no electrical excitation, the valve core plug 9 of the methanol nozzle, the valve core body 7 and the valve core plug 9 are integrally welded by laser, and under the action of the spring 5, it is in conical surface fit with the valve seat 8 to form a seal; in addition, the O-ring 10 installed on the valve seat 8 and the valve cover 11 cooperate to form an overall sealed state. From the methanol inlet pipe 1, through the filter screen 2, the pipe core 3, the spring pin 15, the spring 5, the first hole 19 and the second hole 20 of the valve core body 7 to reach the first cavity 21 above the valve seat 8. Since the valve core plug 9 and the valve seat 8 form a seal, the liquid fuel cannot reach the spray holes 18 of the orifice plate 17.
[0039] When an electric excitation pulse is connected to the coil 14 through the insertion piece 16, the magnetic field generated by the coil 14 reaches the upper end face of the valve core body 7 through the valve core 3, the end cover 4, the housing 13, and the guide sleeve 12, and forms a magnetic circuit with the gap between the lower end face of the valve core 3. Since the spacer ring 6 is a non-magnetized material, the closing force formed by the magnetic field in the gap is greater than the elastic pressure exerted by the spring 5 on the valve core body 7. The valve core body 7 moves towards the lower end face of the valve core 3, and the upper end face of the valve core body 7 rests on the lower end face of the valve core 3. At the same time, the valve core plug 9 leaves the valve seat 8, and the fuel enters the second cavity 22 through the gap between the valve core plug 9 and the valve seat 8, and enters the intake pipe connected to the fuel injector oil-alcohol rail through the spray holes 18 of the orifice plate 17. The valve core plug 9 and the valve seat 8 are tapered to form a sealed structure, and the O-ring 10 of the valve seat 8 and the valve cover 11 cooperate to achieve comprehensive sealing, avoiding fuel leakage.
[0040] When connecting the insertion piece 16 for the excitation pulse of the electronic control unit, in order to avoid the situation of detachment or moisture absorption caused by the gap beside the connected insertion piece 16, the threaded rod 24 can be rotated. The threaded rod 24 pushes the piston plate 25 to move. The piston plate 25 can be supported and move smoothly by the guide rods 26 on both sides when moving. When the piston plate 25 moves, it can push the gas in the conveying groove 23 and transport it to the rubber inflatable ring 28 through the conveying pipe 27. Through the inflation and swelling of the rubber inflatable ring 28, the voids around the insertion piece 16 can be filled, avoiding the entry of moisture and other substances into the generated gaps, causing safety hazards such as short circuits. Moreover, the material of the rubber inflatable ring 28 is relatively wear-resistant, which can improve the durability of the seal and avoid the rupture during use, affecting the sealing effect.
[0041] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific embodiments. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention are covered by the scope of the claims of the present invention.
Claims
1. A durable sealing structure for a methanol nozzle, comprising a methanol inlet pipe (1) and a filter screen (2), characterized in that: A filter screen (2) is installed in the alcohol inlet pipe (1), a tube core (3) is installed on the alcohol inlet pipe (1), an end cover (4) is arranged on the tube core (3), a spring (5) is installed in the tube core (3), a spacer ring (6) is installed on the tube core (3), a valve core body (7) is arranged below the tube core (3), a valve seat (8) is installed on the valve core body (7), a valve core plug (9) is arranged in the valve seat (8), an O-ring (10) is installed on the valve seat (8), a valve cover (11) is installed on the valve seat (8), and a guide sleeve (12) is installed on the valve seat (8). A shell (13) is installed on the guide sleeve (12), a coil (14) is installed in the shell (13), a bayonet (15) is arranged in the tube core (3), an insert (16) is installed in the shell (13), a hole plate (17) is installed on the valve cover (11), a spray hole (18) is provided on the hole plate (17), a first hole (19) is provided on the valve core body (7), a second hole (20) is provided on the valve core body (7), a first cavity (21) is provided in the valve seat (8), and a second cavity (22) is provided below the valve core plug (9).
2. The durable sealing structure for methanol nozzle according to claim 1, characterized in that: The outer side surface of the filter screen (2) is in contact with the inner side surface of the alcohol inlet pipe (1).
3. The durable sealing structure for methanol nozzle according to claim 1, characterized in that: The bottom end surface of the valve core plug (9) is higher than the top end surface of the orifice plate (17) and is fixed.
4. The durable sealing structure for methanol nozzle according to claim 1, characterized in that: The spray holes (18) are formed at equal angles on the perforated sheet (17).
5. The durable sealing structure for methanol nozzle according to claim 1, characterized in that The center line of the first hole (19) and the center line of the second hole (20) are on the same horizontal line.