阅读说明：本技术 一种膨胀消音结构及一体式消音电磁阀 (Expansion noise reduction structure and integrated noise reduction electromagnetic valve ) 是由 上官百俊 郦强 罗锋 于 2020-08-11 设计创作，主要内容包括：本发明公开了一种膨胀消音结构及一体式消音电磁阀,其涉及汽车燃油蒸发排放控制系统领域。旨在解决现有电磁阀与膨胀腔的应用,不仅降噪效果不佳,而且很难布置的问题。其技术方案要点包括端盖、上壳体、中壳体、电磁控制组件和下壳体,其中端盖、上壳体与中壳体形成膨胀消音结构,中壳体、电磁控制组件以及下壳体形成电磁控制结构,电磁控制结构与膨胀消音结构一体化连接,集成为一体式消音电磁阀。本发明既能够降低噪音,又方便布置,省去了连接管路和接头,降低了成本,同时还可以提高燃油蒸发系统的脱附响应性。(The invention discloses an expansion silencing structure and an integrated silencing electromagnetic valve, and relates to the field of automobile fuel evaporation and emission control systems. The electromagnetic valve aims to solve the problems that the noise reduction effect is not good and the arrangement is difficult in the application of the existing electromagnetic valve and the expansion cavity. The technical scheme is characterized by comprising an end cover, an upper shell, a middle shell, an electromagnetic control assembly and a lower shell, wherein the end cover, the upper shell and the middle shell form an expansion silencing structure, the middle shell, the electromagnetic control assembly and the lower shell form an electromagnetic control structure, and the electromagnetic control structure is integrally connected with the expansion silencing structure and integrated into an integrated silencing electromagnetic valve. The invention can reduce noise, is convenient to arrange, saves connecting pipelines and joints, reduces cost and can improve the desorption responsiveness of the fuel evaporation system.)

1. An expansion sound-deadening structure, characterized in that: the device comprises an end cover (11), an upper shell (1) and a middle shell (2) which are connected in sequence, wherein a first cavity is formed among the end cover (11), the upper shell (1) and the middle shell (2); an air inlet pipe (112) communicated with the first cavity is arranged on the end cover (11) or the upper shell (1), and a ventilation channel (21) communicated with the first cavity is arranged on the middle shell (2);

a diaphragm plate is arranged in the upper shell (1) and divides the first cavity into an upper cavity and a lower cavity, and a vent hole (13) for communicating the upper cavity with the lower cavity is formed in the diaphragm plate.

2. The expansion silencer structure of claim 1, wherein: the diaphragm comprises a diaphragm ring part connected with the inner side wall of the upper shell (1) and a diaphragm bulge part (12) arranged in the middle of the diaphragm ring part; the section of the clapboard bulge (12) is U-shaped, and the opening of the clapboard bulge is opposite to the ventilation channel (21).

3. The expansion silencer structure of claim 2, wherein: and the inner diameter of the ventilation channel (21) is d, and the shortest distance between the inner end surface of the partition board convex part (12) and the air inlet end surface of the ventilation channel (21) is 2.5-6.5 d.

4. The expansion silencer structure of claim 2, wherein: the inner diameter of the ventilation channel (21) is d, and the equivalent diameter of the baffle boss (12) is 3 d-10 d.

5. The expansion silencer structure of claim 2, wherein: the air vent (13) is arranged on the partition ring part, the air inlet pipe (112) is arranged on the end cover (11) and opposite to the partition ring part, or the air inlet pipe (112) is arranged on the upper shell (1) and opposite to the outer side wall of the partition plate bulge part (12), and the air inlet pipe (112) and the air vent (13) are arranged in a staggered mode.

6. The expansion silencer structure of claim 5, wherein: the air inlet pipe (112) and the vent hole (13) are oppositely arranged at an angle of 180 degrees.

7. The expansion silencer structure of claim 5, wherein: the inner end wall of the end cover (11) is provided with two first flow limiting plates (117) which are respectively positioned at two sides of the opening of the air inlet pipe (112), and the diaphragm part is provided with two second flow limiting plates (18); an air inlet cavity is formed between the two first flow limiting plates (117) and the two second flow limiting plates (18), and a flow limiting plate opening (19) for communicating the air inlet cavity with an upper-layer cavity is formed in the first flow limiting plate (117) or the second flow limiting plate (18).

8. The expansion silencer structure of claim 2, wherein: and a plurality of upper shell turbulence ribs positioned in the upper-layer cavity are arranged in the upper shell (1).

9. The expansion silencer structure of claim 8, wherein: go up casing vortex muscle including set up in a plurality of first vortex muscle (16) of baffle bellying (12) lateral wall, and set up in a plurality of second vortex muscle (17) of going up casing (1) inside wall, and a plurality of first vortex muscle (16) are the setting of staggering with second vortex muscle (17).

10. The expansion silencer structure of claim 2, wherein: the partition ring part is provided with a plurality of first grooves (14) and second grooves (15) which are arranged at intervals, wherein the first grooves (14) are communicated with the upper-layer cavity, and the second grooves (15) are communicated with the lower-layer cavity.

11. The expansion silencer structure of claim 1, wherein: and the end cover (11) is provided with an end cover bulge part (111) capable of increasing the volume of the upper-layer cavity.

12. The expansion silencer structure of claim 1, wherein: and the middle shell (2) is provided with a plurality of third grooves (22) capable of increasing the volume of the lower-layer cavity.

13. The utility model provides an integral type amortization solenoid valve which characterized in that: comprises an electromagnetic control structure and an expansion silencing structure which are connected integrally.

14. The integrated muffling solenoid valve of claim 13, wherein: the structure of any one of claims 1 to 12, the structure of electromagnetic control comprising a lower shell (4) connected to the middle shell (2), the lower shell (4) and the middle shell (2) forming a second chamber therebetween; an electromagnetic control assembly (3) for controlling the opening or closing of the ventilation channel (21) is arranged in the second chamber, and an air outlet pipe (41) communicated with the second chamber is arranged on the lower shell (4).

15. The integrated muffling solenoid valve of claim 14, wherein: the end face of the middle shell (2) is provided with a plurality of middle shell turbulence ribs distributed around the ventilation channel (21), and the middle shell turbulence ribs are located in the second cavity.

16. The integrated muffling solenoid valve of claim 15, wherein: the middle shell turbulence ribs comprise inner ring turbulence ribs and outer ring turbulence ribs (25) which are arranged in a staggered mode.

Technical Field

The invention relates to the field of automobile fuel evaporation and emission control systems, in particular to an expansion silencing structure and an integrated silencing electromagnetic valve.

Background

With the vigorous development of the modern automobile industry, control of the problems of automobile exhaust emission, fuel evaporation leakage pollution and the like has become one of the key points in the automobile research and development process. Based on published limit values for emission of pollutants for light automobiles in GB18352.6-2016 and measurement methods (sixth stage in China), the emission of gasoline allowed to volatilize into the atmosphere by automobiles needs to be more strictly controlled.

In an automobile fuel evaporative emission control system (EVAP), it is now common in the automotive field to treat the gasoline vapors of automobiles with a canister solenoid valve. Gasoline in the oil tank is easy to evaporate, the evaporation capacity is increased along with the rise of temperature, in order to ensure that gasoline steam is not discharged into the atmosphere to pollute the environment, people use the good adsorption capacity of activated carbon to manufacture a carbon tank to temporarily store the gasoline steam, when an engine works, an electronic control unit of an automobile sends out different electric pulse signals according to the working condition of the engine to control the opening or closing of an electromagnetic valve of the carbon tank, so that the gasoline steam in the carbon tank is sent into an engine cylinder through the electromagnetic valve of the carbon tank and a one-way valve to be burnt, the environment is protected, and fuel is saved.

The carbon tank solenoid valve can send the valve head striking noise of "Da" when normal during operation, and the production mechanism of its noise lies in that the high-speed of metal valve block opens and shuts and can cause the vibration of whole valve body different directions to with produce the collision between the carbon tank solenoid valve support on the automobile body, thereby send the noise with the same frequency of valve body vibration, especially when valve body work load is big, the noise of production will obviously influence the travelling comfort of car.

Referring to fig. 1, in order to reduce noise, an expansion chamber 51 having a gradually changing cross-sectional area is generally provided in front of a canister solenoid valve 53, and a pipe 52 is connected between the canister solenoid valve 53 and the expansion chamber 51 to reduce noise by changing acoustic impedance.

However, the expansion cavity is simple in structure and limited in noise reduction effect, and meanwhile pipelines between the expansion cavity and the carbon tank electromagnetic valve and the expansion cavity are difficult to arrange on many vehicle types or engines.

Disclosure of Invention

In view of the defects in the prior art, an object of the present invention is to provide an expansion noise reduction structure, which has the advantage of improving noise reduction effect.

In order to achieve the purpose, the invention provides the following technical scheme:

an expansion noise reduction structure comprises an end cover, an upper shell and a middle shell which are sequentially connected, wherein a first chamber is formed among the end cover, the upper shell and the middle shell; an air inlet pipe communicated with the first cavity is arranged on the end cover or the upper shell, and a ventilation channel communicated with the first cavity is arranged on the middle shell;

the upper shell is internally provided with a diaphragm plate which divides the first cavity into an upper cavity and a lower cavity, and the diaphragm plate is provided with an air vent which communicates the upper cavity with the lower cavity.

Further, the diaphragm plate comprises a spacer ring part connected with the inner side wall of the upper shell and a diaphragm boss part arranged in the middle of the spacer ring part; the section of the convex part of the clapboard is U-shaped, and the opening of the convex part of the clapboard is opposite to the ventilation channel.

Further, the inner diameter of the ventilation channel is d, and the shortest distance between the inner end surface of the partition board protruding part and the air inlet end surface of the ventilation channel is 2.5 d-6.5 d.

Furthermore, the inner diameter of the ventilation channel is d, and the equivalent diameter of the baffle boss is 3 d-10 d.

Furthermore, the air vent is opened on the partition ring portion, the intake pipe set up in on the end cover with the partition ring portion is relative, perhaps the intake pipe set up in on the upper housing with the partition plate bellying lateral wall is relative, just intake pipe and air vent are the setting of staggering.

Further, the air inlet pipe and the vent hole are arranged oppositely at an angle of 180 degrees.

Furthermore, two first flow limiting plates which are respectively positioned at two sides of the opening of the air inlet pipe are arranged on the inner end wall of the end cover, and two second flow limiting plates are arranged on the diaphragm part; an air inlet cavity is formed between the two first flow limiting plates and the two second flow limiting plates, and a flow limiting plate opening for communicating the air inlet cavity with the upper-layer cavity is formed in the first flow limiting plate or the second flow limiting plate.

Furthermore, a plurality of upper shell turbulence ribs positioned in the upper-layer cavity are arranged in the upper shell.

Further, go up casing vortex muscle including set up in a plurality of first vortex muscle of baffle bellying lateral wall, and set up in a plurality of second vortex muscle of going up the casing inside wall, and a plurality of first vortex muscle is the setting of staggering with the second vortex muscle.

Furthermore, a plurality of first grooves and second grooves which are arranged at intervals are arranged on the partition ring part, wherein the first grooves are communicated with the upper-layer chamber, and the second grooves are communicated with the lower-layer chamber.

Furthermore, an end cover bulge capable of increasing the volume of the upper-layer cavity is arranged on the end cover.

Furthermore, a plurality of third grooves capable of increasing the volume of the lower-layer cavity are formed in the middle shell.

Another object of the present invention is to provide an integrated noise reduction solenoid valve, which can improve noise reduction effect, save connecting pipes and joints, reduce cost, facilitate installation, and have a wide application range.

An integrated silencing electromagnetic valve comprises an electromagnetic control structure and an expansion silencing structure which are connected integrally.

Further, the expansion noise reduction structure is the expansion noise reduction structure, the electromagnetic control structure comprises a lower shell connected with a middle shell, and a second chamber is formed between the lower shell and the middle shell; an electromagnetic control assembly for controlling the opening or closing of the ventilation channel is arranged in the second chamber, and an air outlet pipe communicated with the second chamber is arranged on the lower shell.

Furthermore, a plurality of middle shell turbulence ribs distributed around the ventilation channel are arranged on the end face of the middle shell, and the middle shell turbulence ribs are located in the second cavity.

Furthermore, well casing vortex muscle is including being inner circle vortex muscle and the outer lane vortex muscle of crisscross arrangement.

In conclusion, the invention has the following beneficial effects:

1. the electromagnetic control structure and the expansion silencing structure are integrally connected, so that the noise can be reduced, the arrangement is convenient, and the desorption responsiveness of the fuel evaporation system can be improved;

2. the gas can generate turbulent flow in the flowing process, is expanded and compressed sometimes, consumes the energy of sound, and achieves the purposes of noise reduction and silencing;

3. the provision of the partition projection can reduce the noise generated by the electromagnetic control assembly during the control of the opening or closing of the vent passage.

Drawings

FIG. 1 is a schematic view of a connection structure between a canister solenoid valve and an expansion chamber in the background art;

FIG. 2 is a schematic view of an expansion silencer structure according to example 1;

FIG. 3 is a schematic structural view of an end cap in embodiment 1;

FIG. 4 is a first schematic structural view of the upper case according to embodiment 1;

FIG. 5 is a second schematic structural view of the upper case in embodiment 1;

FIG. 6 is a schematic structural view of a case in embodiment 1;

FIG. 7 is a schematic view of an expansion silencer structure according to example 2;

FIG. 8 is a schematic view of an expansion silencer structure according to example 3;

FIG. 9 is a schematic structural view of an end cap according to embodiment 3;

FIG. 10 is a schematic structural view of an upper case in embodiment 3;

FIG. 11 is a schematic structural view of an integrated noise reduction solenoid valve according to embodiment 4;

FIG. 12 is a schematic structural view of a case in embodiment 4;

FIG. 13 is a schematic structural view of an integrated noise reduction solenoid valve according to embodiment 5;

fig. 14 is a schematic structural diagram of an integrated silencing electromagnetic valve in embodiment 6.

In the figure: 1. an upper housing; 11. an end cap; 111. an end cap boss; 112. an air inlet pipe; 113. a reinforcing ring; 114. a first reinforcing rib; 115. a second reinforcing rib; 116. positioning the clamping jaw; 117. a first restrictor plate; 12. a separator boss; 121. a third reinforcing rib; 13. a vent hole; 131. a fourth reinforcing rib; 14. a first groove; 15. a second groove; 16. a first spoiler rib; 17. a second spoiler rib; 18. a second restrictor plate; 19. the flow limiting plate is provided with an opening; 2. a middle shell; 21. a vent passage; 211. an inner bevel; 212. an outer bevel; 22. a third groove; 23. a first inner ring spoiler rib; 24. a second inner ring spoiler rib; 25. outer ring turbulence ribs; 26. a flow guide arc surface; 3. an electromagnetic control assembly; 4. a lower housing; 41. an air outlet pipe; 51. an expansion chamber; 52. a pipeline; 53. carbon tank solenoid valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.