CN218818172U - Electromagnetic valve for balancing air pressure of oil tank - Google Patents
Electromagnetic valve for balancing air pressure of oil tank Download PDFInfo
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- CN218818172U CN218818172U CN202222280245.7U CN202222280245U CN218818172U CN 218818172 U CN218818172 U CN 218818172U CN 202222280245 U CN202222280245 U CN 202222280245U CN 218818172 U CN218818172 U CN 218818172U
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Abstract
The invention discloses an electromagnetic valve for balancing the air pressure of an oil tank, which comprises an upper valve body, a middle valve body and a lower valve body, wherein an inner cavity of the upper valve body is communicated with an inner cavity of the middle valve body, a sealing surface is formed at the communicated position through a sealing assembly, and a circle of flange is arranged at the bottom end of the upper valve body and is contacted with the sealing surface to form a first channel; an electromagnetic valve is fixed in a cavity formed by communicating the inner cavity of the middle valve body with the inner cavity of the lower valve body, and the electromagnetic valve is fixedly connected with the sealing assembly and used for driving the sealing assembly to be far away from the upper valve body so as to open a first channel; the middle part of the sealing assembly is provided with a sealing guide rod, the sealing guide rod comprises a sealing joint, a guide rod and a small-diameter spring, a circle of flange is arranged at the bottom end of the sealing joint and is in contact with a sealing surface to form a second channel, the guide rod penetrates through the through hole and then is connected with the electromagnetic valve through a locking piece, and the locking piece compresses the small-diameter spring to enable the second channel to be in a sealing state. The invention improves the sealing mode and improves the integral sealing performance.
Description
Technical Field
The invention relates to the technical field of automobile oil tank electromagnetic valves, in particular to an electromagnetic valve for balancing oil tank air pressure.
Background
When the power automobile consumes fuel oil, the air pressure in the oil tank is lower than the external air pressure and exceeds a certain pressure difference, and the external air is required to enter to keep the air pressure balance; on the contrary, if the fuel tank is evaporated under high temperature shock, resulting in internal pressure higher than external pressure, a certain pressure difference is exceeded, and it is necessary to discharge the fuel to the outside. The oil tank isolation valve is used between a high-pressure oil tank and a carbon tank of a power automobile, one side of the oil tank isolation valve is connected with an exhaust system in the oil tank, and the other side of the oil tank isolation valve is connected with the carbon tank and is driven by an electric signal to play a role in exchanging with the atmosphere and balancing the pressure in the oil tank.
The existing oil tank isolation valve mainly structurally comprises a valve body and a valve cover, wherein a spring is sleeved on the valve, an electromagnetic coil is energized in the valve body, and the electromagnetic force generated by the electromagnetic coil enables a movable iron core and the valve to move together, so that the valve is opened and closed. In the structure, the movable iron core is generally of a solid structure, the product is heavy, and the inclination of the iron core is severe due to gravity when the movable iron core is horizontally installed, so that the sealing performance of the product is influenced; the existing valve spring has smaller outer diameter and weaker support stability to the movable iron core, thereby influencing the sealing performance of a product; the movable iron core assembly is of a metal integrated structure, so that the machining difficulty is high, the machining cost is high, and more materials are wasted; the movable iron core and the plastic framework move in a matched mode, plastic is susceptible to high and low temperature to influence movement gaps, the movable iron core is prone to clamping stagnation, the plastic framework is prone to abrasion after being durable for tens of millions of times, and sealing performance of products is difficult to guarantee after abrasion. In addition, the sealing mode of the existing valve adopts the sealing mode that the rubber end is a line and the plastic part is a surface, and the surface of the plastic part is easy to deform by injection molding, so that the repeatability and the reproducibility of the sealing performance are poor. The special-shaped circular structure of the existing valve cover mostly adopts circumferential welding, and is easily affected by injection molding deformation to cause poor welding or welding missing risk.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide the electromagnetic valve for balancing the air pressure of the oil tank, which aims to overcome the defects in the prior art, improve the sealing mode and improve the overall sealing performance.
The technical scheme is as follows: the invention relates to an electromagnetic valve for balancing the air pressure of an oil tank, which comprises a valve body and a valve cover, wherein the valve body comprises an upper valve body, a middle valve body and a lower valve body, the upper valve body is provided with a first vent pipeline leading to a carbon tank, and the middle valve body is provided with a second vent pipeline leading to the oil tank;
the inner cavity of the upper valve body is communicated with the inner cavity of the middle valve body, a sealing surface is formed at the communication part through a sealing assembly, and a circle of flange is arranged at the bottom end of the upper valve body and is in contact with the sealing surface to form a first channel; an electromagnetic valve is fixed in a cavity formed by communicating the inner cavity of the middle valve body with the inner cavity of the lower valve body, the electromagnetic valve is fixedly connected with the sealing assembly and is used for driving the sealing assembly to be away from the upper valve body so as to open the first channel, and the first vent pipeline is communicated with the second vent pipeline through the inner cavity of the upper valve body, the first channel and the inner cavity of the middle valve body;
the sealing assembly is characterized in that a through hole is formed in the middle of the sealing assembly, a sealing guide rod is arranged at the position of the through hole and comprises a sealing joint, a guide rod vertically connected with the sealing joint and a small-diameter spring sleeved on the guide rod, a circle of flange is arranged at the bottom end of the sealing joint and contacts with the sealing surface to form a second channel, the guide rod penetrates through the through hole and then is connected with the electromagnetic valve through a locking piece, the locking piece compresses the small-diameter spring to enable the second channel to be in a sealing state, the electromagnetic valve is provided with a valve cavity and communicated with the second vent pipeline, and when the pressure of the second vent pipeline is greater than that of the first vent pipeline, the small-diameter spring is forced to stretch to open the second channel by gas in the second vent pipeline, and the second vent pipeline is communicated with the first vent pipeline through the valve cavity, the second channel and an inner cavity of the upper valve body.
The technical scheme is further perfected, the electromagnetic valve comprises a fixed iron core, a coil assembly and a movable iron core assembly, the fixed iron core is arranged at the bottom in the lower valve body, and the coil assembly is connected with the fixed iron core; the movable iron core assembly comprises a movable iron core and a valve core, the movable iron core is a hollow cylinder, one end of the hollow cylinder is a suction surface, and the other end of the hollow cylinder is an opening; the sealing assembly is sleeved on the sealing end of the valve core, and the other end of the valve core, opposite to the sealing end, is in butt joint with the open end of the movable iron core.
Furthermore, a stainless steel sleeve is arranged on the inner wall of the lower valve body, a large-diameter spring is sleeved on the valve core, one end of the large-diameter spring is connected with the sealing end of the valve core, the other end of the large-diameter spring abuts against the stainless steel sleeve, and the movable iron core is in sliding fit with the stainless steel sleeve.
Furthermore, the valve core is made of plastic materials.
Furthermore, the sealing component is made of rubber.
Furthermore, the contact parts of the upper valve body, the sealing joint and the sealing assembly are made of plastic materials.
Furthermore, the valve core is provided with a central cavity corresponding to the through hole of the sealing assembly, the guide rod penetrates through the central cavity of the valve core, and the locking piece is fixed on the guide rod and limited by the bottom end of the valve core.
Further, the small-diameter spring is limited between the middle of the valve core and the locking piece.
Furthermore, the valve cover covers the upper part of the upper valve body, and the covering surface is sealed by end face welding.
Furthermore, the end face welding is formed by scanning laser welding through a galvanometer.
Has the advantages that: compared with the prior art, the invention has the advantages that: according to the sealing structure designed by the invention, the sealing assembly adopts rubber as a contact surface, the first channel and the second channel adopt plastic parts to form a sealing mode of a rubber surface and a plastic wire, the sealing structure is not easily influenced by injection molding deformation, and the repeatability and the reproducibility of the sealing performance are further ensured.
Move the iron core subassembly and form metal and add the working of plastics structure, reduce the processing degree of difficulty and processing cost, reduce the material waste, wherein move the iron core design and be hollow structure, the product is lighter, leads to the iron core slope less because of gravity during horizontal installation, and then improves product sealing performance.
The large-diameter spring is matched with the stainless steel sleeve, the outer diameter of the spring is large, the support stability of the movable iron core is high, and the sealing performance of a product is guaranteed. The movable iron core and the stainless steel sleeve move in a matched mode, the metal is not affected by high and low temperatures in the movement gap, the risk of clamping stagnation of the movable iron core is avoided, and the movement gap can be made to be higher. The metal material with the same hardness is not easy to wear, and the sealing performance of the product can be still ensured after the product is durable for tens of millions of times.
The end face welding is adopted between the valve cover and the valve body, the welding is not easily influenced by injection molding deformation, the end face welding can also effectively prevent welding leakage, and the end face welding has higher welding efficiency by adopting galvanometer scanning.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is an enlarged schematic view at C of FIG. 3;
FIG. 5 is an enlarged schematic view at B in FIG. 3;
FIG. 6 is a top view schematic of the plunger assembly;
fig. 7 is a bottom-facing schematic view of the plunger assembly.
In the figure: 1. a valve cover; 2, a valve body; 3. a valve core; 4. sealing the guide rod; 5. a large-diameter spring; 6. a movable iron core; 7. a stainless steel sleeve; 8. fixing an iron core; 9. a coil assembly; 10: a seal assembly; 11. a first channel; 12. a second channel; 21. a first vent line; 22. a second vent line.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
The electromagnetic valve for balancing the air pressure of the oil tank as shown in fig. 1 and 2 comprises a valve body 2 and a valve cover 1, wherein the valve body 2 comprises an upper valve body, a middle valve body and a lower valve body, the upper valve body is provided with a first vent pipeline 21 leading to a carbon tank, and the middle valve body is provided with a second vent pipeline 22 leading to the oil tank.
As shown in fig. 3, the inner cavity of the upper valve body is communicated with the inner cavity of the middle valve body, a sealing surface is formed at the communication position through a sealing assembly 10, the sealing assembly 10 is made of rubber, and a circle of flange is arranged at the bottom end of the upper valve body and is in contact with the sealing surface to form a first channel 11; an electromagnetic valve is fixed in a cavity formed by communicating an inner cavity of the middle valve body with an inner cavity of the lower valve body, the electromagnetic valve is fixedly connected with the sealing assembly 10 and used for driving the sealing assembly 10 to be far away from the upper valve body so as to open the first channel 11, and the first vent pipeline 21 is communicated with the second vent pipeline 22 through the inner cavity of the upper valve body, the first channel 11 and the inner cavity of the middle valve body;
the middle of the sealing assembly 10 is provided with a through hole, a sealing guide rod 4 is arranged at the through hole, the sealing guide rod 4 comprises a sealing joint, a guide rod vertically connected with the sealing joint and a small-diameter spring sleeved on the guide rod, a circle of flange is arranged at the bottom end of the sealing joint and is in contact with a sealing surface to form a second channel 12, the guide rod passes through the through hole and then is connected with the electromagnetic valve through a locking piece, the locking piece compresses the small-diameter spring to enable the second channel 12 to be in a sealing state, the electromagnetic valve is provided with a valve cavity communicated with a second vent pipeline 22, when the pressure of the second vent pipeline 22 is greater than the pressure of the first vent pipeline 21, the small-diameter spring is forced by the gas in the second vent pipeline 22 to stretch to open the second channel 12, and the second vent pipeline 22 is communicated with the first vent pipeline 21 through the valve cavity, the second channel 12 and an inner cavity of the upper valve body.
As shown in fig. 4, in the sealing structure designed by the present invention, rubber is used as a contact surface for the sealing component 10, and plastic parts are used for the first channel 11 and the second channel 12 to form a sealing manner of a rubber surface and a plastic wire, which is not easily affected by injection molding deformation, so as to ensure repeatability and reproducibility of sealing performance.
As shown in figure 5, the valve cover 1 is covered above the upper valve body, and the covered surface is sealed by adopting end face welding. The end face welding is formed by scanning laser welding by a galvanometer. The valve gap 1 abnormal shape circle is the end face welding, is difficult to receive the deformation influence welding of moulding plastics, and the end face welding can also effectively leak protection weld, and the end face welding adopts the galvanometer scanning welding efficiency higher.
As shown in fig. 6 and 7, the solenoid valve includes a fixed iron core 8, a coil assembly 9, and a movable iron core assembly, the fixed iron core 8 is disposed at the bottom of the lower valve body, and the coil assembly 9 is connected to the fixed iron core 8; the movable iron core component comprises a movable iron core 6 and a valve core 3, the movable iron core 6 is a hollow cylinder, one end of the hollow cylinder is an attraction surface, and the other end of the hollow cylinder is an opening; the sealing component 10 is sleeved on the sealing end of the valve core 3, and the other end of the valve core 3 opposite to the sealing end is in butt joint with the open end of the movable iron core. The movable iron core 6 is designed to be of a hollow structure, the product is light, the inclination of the iron core is small due to gravity during horizontal installation, and the sealing performance of the product is improved. The valve core 3 is made of plastic, the movable iron core assembly forms a metal and plastic piece structure, the processing difficulty and the processing cost are reduced, and the material waste is reduced.
The lower valve body is provided with a stainless steel sleeve 7 along the inner wall, a large-diameter spring 5 is sleeved on the valve core 3, one end of the large-diameter spring 5 is connected with the sealing end of the plastic piece, the other end of the large-diameter spring abuts against the stainless steel sleeve 7, and the movable iron core is in sliding fit with the stainless steel sleeve 7. The valve core 3 is provided with a central cavity corresponding to the through hole of the sealing assembly 10, the guide rod penetrates through the central cavity of the valve core 3, and the locking piece is fixed on the guide rod and limited by the bottom end of the valve core 3. The small-diameter spring is limited between the middle part of the valve core 3 and the locking piece. The large-diameter spring 5 is matched with the stainless steel sleeve 7, the outer diameter of the spring is large, the support stability of the movable iron core is high, and the sealing performance of a product is guaranteed. The movable iron core and the stainless steel sleeve 7 move in a matching mode, the metal is not affected by high and low temperatures in the movement gap, the risk of clamping stagnation of the movable iron core is avoided, and the movement gap can be made to be higher. The metal material with the same hardness is not easy to wear, and the sealing performance of the product can be still ensured after the product is durable for tens of millions of times.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited to the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A solenoid valve for balancing the air pressure of an oil tank comprises a valve body and a valve cover, wherein the valve body comprises an upper valve body, a middle valve body and a lower valve body, the upper valve body is provided with a first vent pipeline leading to a carbon tank, and the middle valve body is provided with a second vent pipeline leading to the oil tank; the method is characterized in that:
the inner cavity of the upper valve body is communicated with the inner cavity of the middle valve body, a sealing surface is formed at the communication position through a sealing assembly, and a circle of flange is arranged at the bottom end of the upper valve body and is in contact with the sealing surface to form a first channel; an electromagnetic valve is fixed in a cavity formed by communicating the inner cavity of the middle valve body with the inner cavity of the lower valve body, the electromagnetic valve is fixedly connected with the sealing assembly and is used for driving the sealing assembly to be away from the upper valve body so as to open the first channel, and the first vent pipeline is communicated with the second vent pipeline through the inner cavity of the upper valve body, the first channel and the inner cavity of the middle valve body;
the sealing assembly middle part is equipped with the through-hole, and through-hole department is equipped with sealed guide arm, sealed guide arm includes sealing joint, the perpendicular guide arm that links to each other with sealing joint and the path spring of cover on the guide arm, the sealing joint bottom be equipped with the round flange with sealed face contact forms the second passageway, the guide arm pass behind the through-hole through the locking piece with the solenoid valve links to each other, the locking piece compression the path spring makes the second passageway be in encapsulated situation, the solenoid valve be equipped with the valve pocket with second vent line intercommunication, when the pressure of second vent line is greater than first vent line pressure, gas in the second vent line forces path spring tensile in order to open the second passageway, second vent line through valve pocket, second passageway, go up the valve body inner chamber with first vent line intercommunication.
2. The solenoid valve for balancing tank air pressure according to claim 1, wherein: the electromagnetic valve comprises a fixed iron core, a coil assembly and a movable iron core assembly, wherein the fixed iron core is arranged at the bottom in the lower valve body, and the coil assembly is connected with the fixed iron core; the movable iron core assembly comprises a movable iron core and a valve core, the movable iron core is a hollow cylinder, one end of the hollow cylinder is a suction surface, and the other end of the hollow cylinder is an opening; the sealing assembly is sleeved on the sealing end of the valve core, and the other end of the valve core, opposite to the sealing end, is in butt joint with the open end of the movable iron core.
3. The solenoid valve for balancing the air pressure of the fuel tank according to claim 2, wherein: the lower valve body is provided with a stainless steel sleeve along the inner wall, the valve core is sleeved with a large-diameter spring, one end of the large-diameter spring is connected with the sealing end of the valve core, the other end of the large-diameter spring abuts against the stainless steel sleeve, and the movable iron core is in sliding fit with the stainless steel sleeve.
4. The solenoid valve for balancing the air pressure of the fuel tank according to claim 2, wherein: the valve core is made of plastic materials.
5. The solenoid valve for balancing tank air pressure according to any one of claims 1 to 4, wherein: the sealing component is made of rubber.
6. The solenoid valve for balancing tank air pressure according to claim 5, wherein: the contact parts of the upper valve body, the sealing joint and the sealing component are made of plastic materials.
7. The solenoid valve for balancing the air pressure of the fuel tank according to claim 2, wherein: the valve core is provided with a central cavity corresponding to the through hole of the sealing assembly, the guide rod penetrates through the central cavity of the valve core, and the locking piece is fixed on the guide rod and limited by the bottom end of the valve core.
8. The solenoid valve for balancing tank air pressure according to claim 7, wherein: the small-diameter spring is limited between the middle part of the valve core and the locking piece.
9. The solenoid valve for balancing tank air pressure according to claim 1, wherein: the valve cover covers the upper portion of the upper valve body, and the covering surface is sealed through end face welding.
10. The solenoid valve for balancing tank air pressure according to claim 9, wherein: the end face welding is formed by scanning laser welding through a galvanometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222280245.7U CN218818172U (en) | 2022-08-29 | 2022-08-29 | Electromagnetic valve for balancing air pressure of oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222280245.7U CN218818172U (en) | 2022-08-29 | 2022-08-29 | Electromagnetic valve for balancing air pressure of oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218818172U true CN218818172U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222280245.7U Active CN218818172U (en) | 2022-08-29 | 2022-08-29 | Electromagnetic valve for balancing air pressure of oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218818172U (en) |
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2022
- 2022-08-29 CN CN202222280245.7U patent/CN218818172U/en active Active
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