Anti-falling protection structure of breathing film of electronic actuator

Abstract

The utility model relates to an anti-falling protection structure of a breathing film of an electronic actuator. The anti-falling protection structure comprises a shell; the breathing film is arranged on the shell, and the breathing film is breathable, dustproof and waterproof; a protrusion is arranged at the position, right opposite to the shell, of the breathing film, a cavity is formed in the protrusion, air holes are formed in the side wall of the protrusion, the breathing film covers the cavity, and the air holes are communicated with the cavity. According to the anti-falling protection structure of the breathing film of the electronic actuator, a self-protection structure is designed on the shell, and the shell can protect the breathing film without depending on an external structure; therefore, the only water jet capable of reaching the air hole is water flow reflected by the side wall in front of the air hole, but the pressure of the water flow is smaller than the force of direct jet, so that the water flow does not have pressure capable of causing the falling of the breathing film when reaching the breathing film, and the stability of the breathing film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic actuators, in particular to an anti - shedding protection structure for the breathing membrane of an electronic actuator. Background Art

[0002] An actuator is an actuator in an automatic control system. The power source of an actuator in the prior art is generally a motor, and then it is transmitted to a control rod through a speed - reducing mechanism to realize the adjustment of a valve.

[0003] The electronic actuator in the prior art has a breathing membrane structure. The installation design of the breathing membrane is generally to set a through - hole on the outer shell of the actuator, and a breathing membrane is set on the through - hole. The function of the breathing membrane is to breathe, prevent dust and water. At present, the breathing membrane is ultrasonically welded on the outer shell of the actuator. In order to achieve the purpose of breathing, preventing dust and water of the breathing membrane, the relative position of the outer shell needs to be clear to realize the function of breathing, preventing dust and water of the breathing membrane.

[0004] However, the strength of ultrasonic welding cannot withstand too high pressure, that is, it cannot withstand the direct impact of high - pressure water flow, which is likely to cause the breathing membrane to fall off. In this case, not only the cost is wasted, but also the application flexibility of the actuator is affected. Therefore, a structure is needed to prevent the breathing membrane from falling off due to external mechanical stress. Content of the Utility Model

[0005] For this reason, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the breathing membrane is simply welded on the outer shell of the electronic actuator, and due to the impact of high - pressure water, the breathing membrane is likely to fall off, affecting the use of the electronic actuator.

[0006] To solve the above - mentioned technical problem, the utility model provides an anti - shedding protection structure for the breathing membrane of an electronic actuator, including: an outer shell; a breathing membrane, which is arranged on the outer shell, and the breathing membrane can breathe while preventing dust and water; a protrusion is arranged at the position of the outer shell opposite to the breathing membrane, the inside of the protrusion is set as a cavity, air - permeable holes are arranged on the side wall of the protrusion, the breathing membrane covers the cavity, and the air - permeable holes communicate with the cavity.

[0007] In an embodiment of the utility model, the cross - sectional area of the breathing membrane is larger than the cross - sectional area of the protrusion, and the surface of the cavity in contact with the breathing membrane is an open structure.

[0008] In an embodiment of the utility model, the end face of the protrusion opposite to the breathing membrane is set as closed.

[0009] In an embodiment of the utility model, the breathing membrane is circular and thin - sheet - shaped, the protrusion is cylindrical, and the air - permeable holes are arranged on the outer wall of the circumferential side of the protrusion.

[0010] In an embodiment of the present utility model, the protrusion is a structure that protrudes outward away from the outer wall of the housing, and the ventilation holes are provided at the corner positions where the protrusion is connected to the housing.

[0011] In an embodiment of the present utility model, the ratio of the area of the ventilation holes to the circumferential outer wall area of the radial cross-section of the protrusion where the ventilation holes are located is 30%.

[0012] In an embodiment of the present utility model, an inclined transition surface is provided on the inner wall of the cavity close to the breathing membrane.

[0013] In an embodiment of the present utility model, the inclined transition surface inclines from the end surface where the breathing membrane contacts the housing towards the inner wall of the cavity, and the inclined transition surface is disposed opposite to the ventilation holes.

[0014] In an embodiment of the present utility model, a groove is provided on the housing, the cross-section of the groove is circular, the breathing membrane is disposed on the bottom surface of the groove, and the protrusion is disposed on the bottom surface outside the groove.

[0015] In an embodiment of the present utility model, the breathing membrane is ultrasonically welded to the bottom surface of the groove.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] For the anti-detachment protection structure of the breathing membrane of the electronic actuator described in the present utility model, a self-protection structure is designed on the housing, and the housing itself realizes the protection of the breathing membrane without relying on external structures; in this way, the only water jet that can reach the ventilation holes is the water flow reflected by the side wall in front of the ventilation holes, but the pressure of this water flow is already less than the force of the direct jet, so as to ensure that when the water flow reaches the breathing membrane, it no longer has the pressure that can cause the breathing membrane to fall off, the stability of the breathing membrane is improved, the quality of the product is improved, and thus the competitiveness of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to the specific embodiments of the present utility model in conjunction with the accompanying drawings, where

[0019] Figure 1 is a schematic structural diagram of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure I ;

[0020] Figure 2 is a schematic structural diagram of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure II ;

[0021] Figure 3Cross-sectional view of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model;

[0022] Figure 4 In the preferred embodiment of the present utility model Figure 3 Partial enlarged view;

[0023] Figure 5 Schematic diagram of the partial structure of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure I ;

[0024] Figure 6 Schematic diagram of the partial structure of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure II ;

[0025] Figure 7 Schematic diagram of the partial structure of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure III ;

[0026] Figure 8 Schematic diagram of the partial structure of the anti-detachment protection structure of the breathing membrane of the electronic actuator in the preferred embodiment of the present utility model Figure IV .

[0027] Explanation of the reference numerals in the drawings of the specification: housing 1, groove 11, breathing membrane 2, protrusion 3, cavity 31, inclined transition surface 311, ventilation hole 32. Detailed implementation manners

[0028] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0029] Referring to Figures 1-8 As shown, the anti-detachment protection structure of the breathing membrane of the electronic actuator of the present utility model includes: a housing 1 and a breathing membrane 2. The breathing membrane 2 is disposed on the housing 1, and the breathing membrane 2 can be breathable while preventing dust and water. A protrusion 3 is provided at the position of the housing 1 opposite to the breathing membrane 2. The inside of the protrusion 3 is provided as a cavity 31. A ventilation hole 32 is provided on the side wall of the protrusion 3. The breathing membrane 2 covers the cavity 31, and the ventilation hole 32 communicates with the cavity 31. In the design of the housing 1, a protruding protrusion 3 is designed on the outside of the breathing membrane 2, and the ventilation hole 32 is designed on the side wall of the protrusion 3. There is a limited height in the design of the protrusion 3, which will not cause interference to the customer during installation.

[0030] In the above structure, the cross-sectional area of the breathing membrane 2 is larger than that of the protrusion 3, and the surface of the cavity 31 in contact with the breathing membrane 2 is an open structure. Only when the area of the breathing membrane 2 is larger than the area of the opening of the cavity 31 can the breathing membrane 2 cover the cavity 31. The end face of the protrusion 3 facing the breathing membrane 2 is set to be closed. The top of the protrusion 3 is closed, which can shield the direct impact of water flow coming from the axial direction (perpendicular to the membrane - the worst direction) of the ventilation hole 32.

[0031] In the above structure, the breathing membrane 2 is in the shape of a circular thin sheet, the protrusion 3 is in the shape of a cylinder, and the ventilation holes 32 are arranged on the circumferential outer wall of the protrusion 3. The protrusion 3 is a structure that protrudes outward from the outer wall away from the housing 1, and the ventilation holes 32 are arranged at the corner positions where the protrusion 3 is connected to the housing 1. The height of the protrusion 3 is relatively low, and the ventilation holes 32 are located below the side wall of the protrusion 3. After the pressure of the reflected water flow reaches the side wall of the ventilation hole 32, it will be further reduced.

[0032] In the above structure, the ratio of the area of the ventilation hole 32 to the circumferential outer wall area of the radial cross-section of the protrusion 3 where the ventilation hole 32 is located is 30%. 30% of the side wall is opened, and the opening direction is towards the side wall with a higher height of the actuator. Therefore, 70% of the area of the side wall of the protrusion 3 is closed, protecting it from the direct side jet in this way.

[0033] In the above structure, an inclined transition surface 311 is provided on the inner wall of the cavity 31 close to the breathing membrane 2. The inclined transition surface 311 inclines from the end face where the breathing membrane 2 contacts the housing 1 towards the inner wall of the cavity 31, and the inclined transition surface 311 is arranged opposite to the ventilation hole 32. The inclined transition surface 311 inclines from the inner wall of the cavity 31 to the outside. The water flow entering the cavity 31 through the ventilation hole 32 first impacts on the inner wall of the cavity 31. As the water flow flows, when it reaches the contact position between the breathing membrane 2 and the inner wall of the cavity 31, the inclined transition surface 311 provided can slow down the water flow, further reducing the pressure of the water flow, thereby reducing the impact of the water flow.

[0034] In the above structure, a groove 11 is provided on the housing 1. The cross-section of the groove 11 is circular. The breathing membrane 2 is arranged on the bottom surface of the groove 11, and the protrusion 3 is arranged on the bottom surface outside the groove 11. The breathing membrane 2 is ultrasonically welded to the bottom surface of the groove 11.

[0035] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. An anti - shedding protection structure for the breathing membrane of an electronic actuator, characterized in that: Comprising, a housing; a breathing membrane, which is disposed on the housing, and the breathing membrane is capable of allowing air permeation while preventing dust and water; a protrusion is provided at a position of the housing opposite to the breathing membrane, the interior of the protrusion is provided as a cavity, air vents are provided on the side wall of the protrusion, the breathing membrane covers the cavity, and the air vents communicate with the cavity.

2. The anti - shedding protection structure of the breathing membrane of the electronic actuator according to claim 1, wherein: The cross-sectional area of the breathing membrane is larger than the cross-sectional area of the protrusion, and the surface of the cavity in contact with the breathing membrane is an open structure.

3. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 2, wherein: The end face of the protrusion opposite to the breathing membrane is provided as closed.

4. The anti - shedding protection structure of the breathing membrane of the electronic actuator according to claim 2, characterized in that: The breathing membrane is in the shape of a circular thin sheet, the protrusion is in the shape of a cylinder, and the air vents are provided on the outer wall of the circumference of the protrusion.

5. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 4, characterized in that: The protrusion is a structure that protrudes outward from the outer wall away from the housing, and the air vents are provided at the corner positions where the protrusion is connected to the housing.

6. The anti - shedding protection structure of the breathing membrane of the electronic actuator according to claim 1, characterized in that: The ratio of the area of the air vents to the area of the circumferential outer wall of the radial cross-section of the protrusion where the air vents are located is 30%.

7. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 1, characterized in that: An inclined transition surface is provided on the inner wall of the cavity close to the breathing membrane.

8. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 7, characterized in that: The inclined transition surface inclines from the end face where the breathing membrane contacts the housing towards the inner wall of the cavity, and the inclined transition surface is disposed opposite to the air vents.

9. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 4, characterized in that: A groove is provided on the housing, the cross-section of the groove is circular, the breathing membrane is disposed on the bottom surface of the groove, and the protrusion is disposed on the bottom surface outside the groove.

10. The anti-detachment protection structure of the breathing membrane of the electronic actuator according to claim 9, characterized in that: The breathing membrane is ultrasonically welded to the bottom surface of the groove.

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