Waterproof cover of electric actuator

Abstract

The utility model discloses a waterproof cover of an electric actuator, which comprises a cover body, an inner cover and an abutting piece are arranged in the cover body, a convex ring is arranged on the inner cover, a gap is arranged between the convex ring and the cover body, a sealing ring is arranged below the convex ring, a containing cavity is arranged on the inner cover, silicone oil is placed in the containing cavity, and the sealing ring is arranged in the containing cavity. The abutting piece abuts against the inner cover. Silicone oil is placed in the containing cavity of the inner cover, when the cover body is installed on the connecting part of the electric actuator, the sealing ring is connected between the protruding ring and the connecting part in an abutting mode so that the waterproof and sealing effects can be achieved on the interior of the electric actuator, meanwhile, the connecting part drives the abutting piece to extrude the inner cover upwards, and the silicone oil overflows from the containing cavity. The silicone oil flows to the periphery of the sealing ring through the gap between the protruding ring and the cover body, the sealing ring is protected through the silicone oil, the sealing ring is prevented from aging, the service life of the sealing ring is prolonged, the effect of the sealing ring is improved, and then the use reliability of the electric actuator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, and particularly relates to a waterproof cover for an electric actuator. Background Art

[0002] An electric actuator is an essential and important component in an automatic control system. Currently, it has been widely used in places such as metallurgy, chemical industry, petroleum, natural gas, and water conservancy, mainly playing roles such as intercepting and limiting the flow of conveying pipelines.

[0003] Existing electric actuators generally use sealing rings to achieve internal sealing to prevent water from seeping into the interior of the electric actuator, causing damage and burnout of the internal electrical components. However, since electric actuators sometimes need to work in high-temperature, humid, and other environments, such harsh working environments are likely to accelerate the aging of sealing components such as sealing rings, resulting in the sealing ring being unable to maintain its original sealing effect and sealing life, thereby affecting the reliable use of the electric actuator. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a waterproof cover for an electric actuator.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A waterproof cover for an electric actuator includes a cover body. An inner cover and an abutting member are arranged inside the cover body. A convex ring is arranged on the inner cover. A gap is arranged between the convex ring and the cover body. A sealing ring is installed below the convex ring. A cavity is formed on the inner cover, and silicone oil is placed in the cavity. The abutting member abuts against the inner cover.

[0007] Preferably, an abutting ring is arranged on the inner cover, the abutting ring of the abutting member abuts against the abutting ring, and a deformation part is arranged between the convex ring and the abutting ring.

[0008] Preferably, the material of the deformation part is flexible rubber.

[0009] Preferably, a resisting plate extending downward is arranged inside the cover body, and the convex ring abuts against the resisting plate.

[0010] Preferably, an internal thread is arranged on the inner circumference of the cover body, and a raw material tape is wound on the internal thread.

[0011] Preferably, the inner circumference size of the sealing ring is larger than the outer circumference size of the abutting member.

[0012] Preferably, an observation window is arranged on the cover body.

[0013] Preferably, the liquid level height of the silicone oil is lower than the height of the convex ring.

[0014] The beneficial effects of the present utility model are as follows:

[0015] Silicone oil is placed in the cavity of the inner cover and abuts against the inner cover upward through the abutting member. When the cover body is installed on the connecting portion of the electric actuator, the sealing ring abuts between the convex ring and the connecting portion to play a waterproof and sealing role for the interior of the electric actuator. At the same time, the connecting portion drives the abutting member to squeeze the inner cover upward, causing the silicone oil to overflow from the cavity and flow to the outer periphery of the sealing ring through the gap between the convex ring and the cover body. The silicone oil forms a protection for the sealing ring to prevent the sealing ring from aging, improve the service life and effect of the sealing ring, and further enhance the reliability of the use of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a schematic cross-sectional view of the present utility model;

[0018] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0019] Figure 4 is an exploded schematic view of the present utility model;

[0020] Figure 5 is a schematic structural view of the cover body of the present utility model;

[0021] Figure 6 is a schematic cross-sectional view of the present utility model during use;

[0022] Figure 7 is Figure 6 an enlarged schematic view of part B in

[0023] In the figures: cover body 1, bottom plate 11, gap 12, internal thread 13, raw material tape 131, observation window 14, inner cover 2, convex ring 21, groove 211, cavity 22, abutting ring 23, deformation part 231, sealing ring 3, abutting member 4, snap ring 41, abutting ring 42, connecting portion 5, external thread 51, internal cavity 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0025] In the description of this specification, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0026] As Figures 1 to 7 shown, a waterproof cover of an electric actuator includes a cover body 1. An inner cover 2 and a contact member 4 are arranged inside the cover body 1. The whole of the inner cover 2 is arranged to be recessed downward. A convex ring 21 is arranged on the inner cover 2. The outer circumference of the convex ring 21 is smaller than the inner circumference of the cover body 1. A gap 12 is arranged between the convex ring 21 and the cover body 1.

[0027] A cavity 22 is formed on the inner cover 2. Silicone oil is placed in the cavity 22. The liquid level height of the silicone oil is lower than the height of the convex ring 21. An observation window 14 is formed on the cover body 1. The observation window 14 can be fixedly and sealedly installed on the cover body 1 through glue such as glass glue. The silicone oil on the inner cover 2 can be observed inward through the observation window 14.

[0028] The contact member 4 abuts on the inner cover 2. The contact member 4 is sleeved on the outer circumference of the inner cover 2. Specifically, a contact ring 23 is arranged on the inner cover 2. The contact ring 23 is located in the middle of the inner cover 2. The contact ring 42 of the contact member 4 extends horizontally inward and abuts on the contact ring 23. When the contact member 4 moves upward, the contact ring 23 can be abutted upward through the contact ring 42, so that the inner cover 2 forms an upward (refer to Figure 2 、 Figure 6 state change).

[0029] Furthermore, a deformation part 231 is arranged between the convex ring 21 and the contact ring 23. The material of the deformation part 231 is flexible rubber. When the contact ring 23 is abutted upward, it is easier for the deformation part 231 to deform, so that the silicone oil placed in the cavity 22 can overflow outward.

[0030] A groove 211 is formed below the convex ring 21. A sealing ring 3 is installed in the groove 211. The inner circumference size of the sealing ring 3 is larger than the outer circumference size of the contact member 4, so that there is no mutual interference between the sealing ring 3 and the contact member 4.

[0031] The cover body 1 is adapted to a connecting part 5 of the electric actuator to be installed, that is, by installing the cover body 1 on the connecting part 5, the sealing of the inside of the electric actuator can be realized.

[0032] The inner circumference of the cover body 1 is provided with an internal thread 13, and the connecting part 5 of the electric actuator is provided with an external thread 51 adapted to the internal thread 13. When the cover body 1 needs to be installed on the connecting part 5 of the electric actuator, the cover body 1 is installed on the connecting part 5 by the cooperation of the internal thread 13 and the external thread 51.

[0033] The internal thread 13 is wound with a PTFE tape 131. By setting the PTFE tape 131, the sealing performance between the internal thread 13 and the external thread 51 is improved, and further the sealing effect of the installed cover body 1 on the electric actuator is enhanced.

[0034] A pressing plate 11 extending downward is arranged inside the cover body 1. The cover body 1 is screwed and tightened on the connecting part 5 until the upper end of the connecting part 5 drives the convex ring 21 to abut against the pressing plate 11. At this time, the sealing ring 3 installed in the groove 211 abuts between the lower end of the convex ring 21 and the upper end of the connecting part 5. The sealing ring 3 waterproofs and seals the inside of the electric actuator.

[0035] Further, the abutting member 4 is provided with a buckling ring 41 extending outward. The abutting member 4 is buckled on the connecting part 5 through the buckling ring 41. The inner cover 2 is placed on the connecting part 5 by the abutting ring 42 of the abutting member 4. When the cover body 1 is screwed and tightened on the connecting part 5, it can be understood that the connecting part 5 drives the abutting member 4 to move upward close to the cover body 1. At this time, the abutting ring 42 abuts upward against the abutting ring 23 of the inner cover 2 to squeeze and deform the deformation part 231, so that the silicone oil overflows from the cavity 22, and flows to the outer periphery of the sealing ring 3 through the gap 12 between the convex ring 21 and the cover body 1. The cover body 1, the connecting part 5, the sealing ring 3, and the convex ring 21 cooperate with each other to form a cavity 6 for accommodating the flowing-out silicone oil. The silicone oil at the cavity 6 protects the sealing ring 3 to prevent the sealing ring 3 from aging, improves the service life and effect of the sealing ring 3, and further enhances the reliability of the electric actuator in use.

[0036] At the same time, the silicone oil can also absorb the moisture in the air infiltrating from between the internal thread 13 and the external thread 51 to prevent the moisture in the air from penetrating into the inside of the electric actuator and improve the sealing effect on the electric actuator.

[0037] Further, when the silicone oil absorbs too much moisture in the air and deteriorates, the state of the silicone oil can be observed inward through the observation window 14 so as to replace the new silicone oil in time and ensure the reliability of the waterproof and sealing of the electric actuator.

[0038] By arranging the buckling ring 41 to be buckled on the connecting part 5, when the deformation part 231 deforms and the silicone oil overflows outward, the overflowing silicone oil will not enter the electric actuator from the connecting part 5, so as to avoid the influence of the overflowing silicone oil on the normal use of the electric actuator.

[0039] The first - stage sealing protection is achieved by the cooperation of the internal thread 13, the external thread 51 and the PTFE tape 131. The second - stage sealing protection is achieved by the cooperation of the convex ring 21, the connecting part 5 and the sealing ring 3. And the overflowing silicone oil is filled in the two - stage protection, which further improves the waterproof and sealing effect of the electric actuator, making the waterproof and sealing effect of this embodiment more reliable.

[0040] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A waterproof cover for an electric actuator, comprising a cover body (1), wherein an inner cover (2) and an abutting member (4) are arranged inside the cover body (1), and it is characterized in that: A convex ring (21) is provided on the inner cover (2). A gap (12) is provided between the convex ring (21) and the cover body (1). A sealing ring (3) is installed below the convex ring (21). A cavity (22) is formed on the inner cover (2), and silicone oil is placed in the cavity (22). The abutting member (4) abuts against the inner cover (2).

2. The waterproof cover of an electric actuator according to claim 1, characterized in that: An abutting ring (23) is provided on the inner cover (2). The abutting ring (42) of the abutting member (4) abuts against the abutting ring (23). A deformation part (231) is provided between the convex ring (21) and the abutting ring (23).

3. The waterproof cover of an electric actuator according to claim 2, characterized in that: The material of the deformation part (231) is flexible rubber.

4. The waterproof cover of an electric actuator according to claim 1, characterized in that: A downward-extending abutting plate (11) is provided in the cover body (1), and the convex ring (21) abuts against the abutting plate (11).

5. The waterproof cover of an electric actuator according to claim 1, characterized in that: Internal threads (13) are provided on the inner circumference of the cover body (1), and a raw tape (131) is wound around the internal threads (13).

6. The waterproof cover of an electric actuator according to claim 1, characterized in that: The inner circumference size of the sealing ring (3) is larger than the outer circumference size of the abutting member (4).

7. The waterproof cover of an electric actuator according to claim 1, characterized in that: An observation window (14) is formed on the cover body (1).

8. The waterproof cover of an electric actuator according to claim 1, characterized in that: The liquid level height of the silicone oil is lower than the height of the convex ring (21).

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