Waterproof and oil-proof ventilation valve and electric capstan

Abstract

The utility model discloses a waterproof and oil-proof ventilation valve and an electric capstan, belongs to the field of ventilation valves, solves the problem of lubricating oil loss caused by low gas passing efficiency or oil sprayed out along with gas, and adopts the technical scheme that the waterproof and oil-proof ventilation valve mainly comprises a valve body, the valve body is provided with an exhaust hole used for exhausting and a channel communicated with the exhaust hole, a breathable film assembly is fixed in the channel, fluid is exhausted from the exhaust hole after passing through the breathable film assembly, the breathable film assembly comprises a breathable film layer and two net-shaped protective layers used for adsorbing oil mist, and the breathable film layer is located between the two net-shaped protective layers. An inlet, away from the exhaust hole, of the channel is in threaded connection with a plug, and a spiral gap for increasing fluid circulation resistance is formed between the plug and the channel through threaded connection. The utility model is mainly used for preventing oil from being discharged along with gas while ensuring that the gas passes through.

Description

Technical Field

[0001] This utility model discloses a waterproof and oil-proof vent valve and an electric winch, belonging to the technical field of vent valves. Background Technology

[0002] As the worm gear winch heats up due to friction during operation, the temperature of the lubricating oil inside the housing rises, causing the gas inside the housing to expand and increasing the pressure. At this point, the housing needs a vent valve to balance the internal pressure. However, existing vent valves have the following shortcomings: Some housings directly install plugs at the vent holes, but this prevents pressure release after gas expansion, easily leading to aging of the sealing rings and seal failure, and oil leakage at the plug point. Other housings use spring preload to hold the ball bearings in place, forming a one-way valve. When the gas pressure inside the housing exceeds a threshold and forces the ball bearings open for pressure release, oil inside the housing will spray out with the airflow, contaminating the equipment surface and causing lubricating oil loss. Still other housings have multiple layers of staggered baffles inside the vent holes to form a meandering channel, but this prolongs the gas flow path, reducing gas throughput. Furthermore, high-temperature oil mist easily condenses and accumulates on the baffles, clogging the meandering channel after long-term use, further reducing gas throughput and even preventing gas leakage. Utility Model Content

[0003] The purpose of this invention is to solve the problem of low gas passage efficiency or oil being sprayed out with the gas, resulting in lubricant loss. To this end, a waterproof and oil-proof vent valve and an electric winch are provided. The plug is threadedly connected to the channel to minimize the amount of oil entering the channel. The gas is then filtered by the vent membrane assembly, ensuring gas passage while preventing oil from being discharged with the gas.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A waterproof and oil-proof breathable valve includes a valve body with an exhaust port for venting and a channel communicating with the exhaust port. A breathable membrane assembly is fixed in the channel. Fluid passes through the breathable membrane assembly and is discharged from the exhaust port. The breathable membrane assembly includes a breathable membrane layer and two mesh protective layers for adsorbing oil mist. The breathable membrane layer is located between the two mesh protective layers. A plug is threadedly connected at the inlet of the channel away from the exhaust port. The threaded connection creates a spiral gap between the plug and the channel, which increases the resistance to fluid flow.

[0006] The beneficial effects of using this utility model are:

[0007] The valve body of this invention has a channel, within which a breathable membrane assembly is installed. A plug is threadedly connected to the inlet of the channel, forming a narrow spiral gap between the plug and the inner wall of the channel. When the gas pressure in the housing increases, gas can enter the channel through this spiral gap. The spiral gap effectively blocks most of the oil from entering the channel, while the plug also slows down the flow rate of the oil after it enters the channel, reducing the impact force of the oil on the breathable membrane assembly and lowering the possibility of damage due to oil impact. Furthermore, the breathable membrane assembly includes a breathable membrane layer and a mesh protective layer. During the gas flow through the breathable membrane assembly, the gas first passes through the mesh protective layer, which adsorbs some of the oil mist carried in the gas, reducing... The gas contains less oil mist. After passing through the permeable membrane layer, the gas blocks the oil mist, thus filtering the gas. This ensures gas passage and reduces the internal pressure while preventing oil from being discharged with the gas, thus avoiding lubricant loss. The double protection of the plug and the permeable membrane assembly prevents membrane assembly failure and achieves both breathability and oil prevention. Furthermore, the permeable membrane layer is situated between two mesh protective layers, which protect it, increase its strength, and prevent damage during installation due to external forces or oil impacts. This reduces the likelihood of membrane failure and extends the lifespan of the vent valve.

[0008] Preferably, the valve body includes an interference-fit valve seat and a valve cap. The valve seat has a slot for inserting the valve cap, a plug is located at the end of the valve seat away from the valve cap, and a vent is located on the valve cap. The vent membrane assembly is clamped between the bottom wall of the slot and the valve cap. Using the aforementioned technical solution, the interference fit between the valve seat and the valve cap improves the sealing performance at the connection point, preventing gas and oil leakage. Furthermore, the vent membrane assembly being clamped between the valve seat and the valve cap allows for easy replacement of the vent membrane assembly when it fails, making the maintenance of the vent valve more convenient.

[0009] Preferably, the inner diameter of the slot is larger than the inner diameter of the channel, the channel extends to the bottom wall of the slot and communicates with the slot, the bottom wall of the slot forms a stepped surface at the edge of the channel, and the breathable membrane assembly is clamped between the stepped surface and the bottom end of the valve cap.

[0010] Preferably, the valve cap has several vent holes on its outer periphery, which are spaced apart circumferentially around the valve cap. By using the aforementioned technical solution, the vent holes are located on the outer periphery of the valve cap, which reduces the amount of debris falling directly into the valve body through the vent holes and prevents debris from clogging the passage.

[0011] Preferably, the valve cap has a radially outwardly extending protruding edge at its top, and the vent hole is located between the protruding edge and the top of the valve seat. Using the aforementioned technical solution, the protruding edge can also shield the vent hole, further reducing the likelihood of external debris entering the valve body through the vent hole and causing blockage of the passage.

[0012] Preferably, the valve body includes a connecting part and a bolt head. The outer surface of the connecting part is provided with external threads, and the outer diameter of the bolt head is larger than the outer diameter of the connecting part. The outer surface of the connecting part near the bolt head is provided with a groove for fitting a sealing ring, which is embedded in the groove and abuts against the bottom of the bolt head. Using the aforementioned technical solution, the bolt head allows users to easily disassemble and install the valve body, making the installation and replacement of the vent valve more convenient and quick.

[0013] Preferably, the mesh protective layer is made of a metal material. Using the aforementioned technical solution, the metal mesh protective layer has higher strength and is less prone to deformation, thus improving the protection of the breathable membrane layer. Furthermore, when high-temperature oil mist encounters the metal mesh protective layer, it is more likely to condense, which helps to improve the mesh protective layer's adsorption capacity for oil mist.

[0014] This utility model also discloses an electric winch, including a housing, the top of which is equipped with a vent valve, which is a waterproof and oil-proof vent valve as described in any of the above.

[0015] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a front view of a waterproof, oil-proof, and breathable valve and an electric winch according to this utility model.

[0018] Figure 2 An exploded view of a waterproof, oil-proof, and breathable valve and an electric winch according to this utility model.

[0019] Figure 3 This is a cross-sectional view of a waterproof, oil-proof, and breathable valve and an electric winch according to the present invention.

[0020] Figure 4 This is a partial cross-sectional view of Embodiment 2 of the present invention.

[0021] Reference numerals: 1. Vent valve; 11. Valve seat; 111. Threaded head; 112. Connecting part; 113. Channel; 114. Slot; 115. Groove; 12. Valve cap; 121. Vent hole; 122. Raised edge; 2. Vent membrane assembly; 21. Mesh protective layer; 22. Vent membrane layer; 3. Plug; 4. Sealing ring; 5. Electric winch. Detailed Implementation

[0022] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Example 1:

[0026] like Figures 1 to 3 As shown in the figure, this embodiment demonstrates a waterproof and oil-proof breathable valve 1, including a valve body. The valve body is provided with an exhaust hole 121 for venting and a channel 113 communicating with the exhaust hole 121. A breathable membrane assembly 2 is fixed in the channel 113. After the fluid passes through the breathable membrane assembly 2, it is discharged from the exhaust hole 121. The breathable membrane assembly 2 includes a breathable membrane layer 22 and two mesh protective layers 21 for adsorbing oil mist. The breathable membrane layer 22 is located between the two mesh protective layers 21. A plug 3 is threadedly connected at the inlet of the channel 113 away from the exhaust hole 121. The threaded connection forms a spiral gap between the plug 3 and the channel 113, which increases the resistance to fluid flow.

[0027] In this embodiment, the valve body is provided with a channel 113, and a breathable membrane assembly 2 is provided inside the channel 113. A plug 3 is threadedly connected to the inlet of the channel 113, and a relatively narrow spiral gap is formed between the plug 3 and the inner wall of the channel 113. When the air pressure in the housing increases, the gas can enter the channel 113 through the spiral gap. The spiral gap can block most of the oil from entering the channel 113. At the same time, the plug 3 can also slow down the flow rate of the oil after entering the channel 113, reduce the impact force of the oil on the breathable membrane assembly 2, and reduce the possibility of damage to the breathable membrane assembly 2 due to the impact of the oil. In addition, the breathable membrane assembly 2 includes a breathable membrane layer 22 and a mesh protective layer 21. During the process of gas passing through the breathable membrane assembly 2, the gas will first pass through the mesh protective layer 21, and the mesh protective layer 21 will adsorb some of the gas. The oil mist carried by the gas is reduced, thus reducing the oil mist content in the gas. After the gas passes through the breathable membrane layer 22, the breathable membrane layer 22 blocks the oil mist from passing through, thereby completing the filtration of the gas. While ensuring the gas can pass through and reducing the air pressure inside the box, it can also prevent oil from being discharged with the gas and causing lubricating oil loss. Through the double protection of the plug 3 and the breathable membrane assembly 2, it can prevent the breathable membrane assembly 2 from failing and achieve the effect of breathability and oil prevention. Secondly, the breathable membrane layer 22 is located between two mesh protective layers 21. The two mesh protective layers 21 can protect the breathable membrane layer 22, improve the strength of the breathable membrane layer 22, and prevent the breathable membrane layer 22 from being damaged by external force or oil impact during installation. This reduces the possibility of the breathable membrane layer 22 failing due to damage and helps to improve the service life of the breathable valve 1.

[0028] like Figure 2 and Figure 3 As shown, the valve body in this embodiment includes an interference-fit valve seat 11 and a valve cap 12. The valve seat 11 is provided with a slot 114 for the valve cap 12 to be inserted. A plug 3 is provided at the end of the valve seat 11 away from the valve cap 12. An exhaust port 121 is provided on the outer periphery of the valve cap 12. The vent membrane assembly 2 is clamped between the bottom wall of the slot 114 and the valve cap 12. The interference fit between the valve seat 11 and the valve cap 12 can improve the sealing performance at the connection between the valve seat 11 and the valve cap 12, preventing gas and oil from leaking from the connection between the valve seat 11 and the valve cap 12. In addition, the vent membrane assembly 2 is clamped between the valve seat 11 and the valve cap 12. When the vent membrane assembly 2 fails, it can be easily replaced, making the maintenance of the vent valve 1 more convenient.

[0029] In this embodiment, the slot 114 is disposed at the top of the valve seat 11. The length direction of the slot 114 is parallel to the length direction of the channel 113, and the inner diameter of the slot 114 is larger than the inner diameter of the channel 113. The top of the channel 113 extends to the bottom wall of the slot 114 and communicates with the slot 114. Since the inner diameter of the slot 114 is larger than the inner diameter of the channel 113, the bottom wall of the slot 114 forms a stepped surface at the edge of the channel 113. The breathable membrane assembly 2 is installed on the bottom wall of the slot 114. The valve cap 12 is inserted into the slot 114 and is pressurized with the inner wall of the slot 114. When the valve cap 12 is inserted into the bottom of the slot 114, the bottom end of the valve cap 12 squeezes the breathable membrane assembly 2 so that the breathable membrane assembly 2 is clamped between the stepped surface and the bottom end of the valve cap 12.

[0030] like Figure 3 As shown, the valve cap 12 in this embodiment has an internal cavity and an open bottom. Several vent holes 121 are provided on the outer periphery of the valve cap 12. The vent holes 121 are distributed at intervals along the circumference of the valve cap 12 and communicate with the cavity. After the valve cap 12 is inserted into the valve seat 11, the open end of the valve cap 12 is located on the upper side of the breathable membrane assembly 2. The cavity is connected to the channel 113 through the breathable membrane assembly 2. After the fluid passes through the breathable membrane assembly 2, it is discharged from the vent holes 121 through the cavity. The vent holes 121 are located on the outer periphery of the valve cap 12, which can reduce the amount of other debris that falls directly into the valve body through the vent holes 121 and prevent debris from blocking the channel 113.

[0031] like Figure 3 As shown, in this embodiment, the overall height of the valve cap 12 is greater than the depth of the slot 114. When the valve cap 12 is fully inserted into the slot 114, the position of the exhaust port is higher than the top of the valve seat 11. The top of the valve cap 12 is provided with a radially outwardly extending protruding edge 122. The exhaust hole 121 is located between the protruding edge 122 and the top of the valve seat 11. The protruding edge 122 can also shield the exhaust hole 121, further reducing the entry of external debris into the valve body through the exhaust hole 121 and thus blocking the channel 113.

[0032] In this embodiment, the valve body is a bolted structure. The valve body includes a connecting part 112 and a bolt head. The outer surface of the connecting part 112 is provided with external threads. The outer diameter of the bolt head is larger than the outer diameter of the connecting part 112. The outer surface of the connecting part 112 near the bolt head is provided with a groove 115 for fitting the sealing ring 4. The sealing ring 4 is embedded in the groove 115 and abuts against the bottom of the bolt head. The bolted structure of the valve body makes it convenient for users to disassemble and install the valve body, making the installation and replacement of the vent valve 1 more convenient and quick.

[0033] like Figure 2In this embodiment, the mesh protective layer 21 is made of a metal material, such as stainless steel. The mesh protective layer 21 has 200-300 pores. The breathable membrane layer 22 is made of expanded polytetrafluoroethylene (ePTFE) material, and the pore size of the breathable membrane layer 22 is 0.2-5 μm, so that the breathable membrane layer 22 can allow gas to pass through and block liquid oil and water. The metal mesh protective layer 21 has higher strength and is not easily deformed, which can improve the protection of the breathable membrane layer 22. In addition, when high-temperature oil mist encounters the metal mesh protective layer 21, it is easier to condense, which helps to improve the adsorption capacity of the mesh protective layer 21 for oil mist.

[0034] Example 2:

[0035] like Figure 4 As shown in the figure, this embodiment demonstrates an electric winch 5, including a housing, and a vent valve 1 is installed on the top of the housing. The vent valve 1 is a waterproof and oil-proof vent valve 1 as described in Embodiment 1.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A waterproof and oil-proof air-permeable valve comprising a valve body provided with an exhaust hole for exhausting air and a passage communicating with the exhaust hole, a gas-permeable membrane assembly being fixed in the passage, fluid passing through the gas-permeable membrane assembly being exhausted from the exhaust hole, characterized in that, The breathable membrane assembly includes a breathable membrane layer and two mesh protective layers for adsorbing oil mist. The breathable membrane layer is located between the two mesh protective layers. A plug is threadedly connected at the inlet of the channel away from the exhaust hole. The threaded connection creates a spiral gap between the plug and the channel, which increases the resistance to fluid flow.

2. A waterproof and oil-proof and air-permeable valve according to claim 1, characterized in that, The valve body includes an interference fit valve seat and a valve cap. The valve seat has a slot for inserting the valve cap. A plug is located at the end of the valve seat away from the valve cap. An exhaust port is located at the valve cap. The breathable membrane assembly is clamped between the bottom wall of the slot and the valve cap.

3. A waterproof and oil-proof and air-permeable valve according to claim 2, characterized in that, The inner diameter of the slot is larger than the inner diameter of the channel. The channel extends to the bottom wall of the slot and communicates with the slot. The bottom wall of the slot forms a stepped surface at the edge of the channel. The breathable membrane assembly is clamped between the stepped surface and the bottom end of the valve cap.

4. A waterproof and oil-proof and air-permeable valve according to claim 2, characterized in that, The valve cap has several vent holes on its outer periphery, which are spaced apart along the circumference of the valve cap.

5. A waterproof and oil-proof and air-permeable valve according to claim 4, characterized in that, The top of the valve cap has a radially outwardly extending convex edge, and the vent hole is located between the convex edge and the top of the valve seat.

6. A waterproof and oil-proof and air-permeable valve according to claim 1, characterized in that, The valve body includes a connecting part and a bolt head. The outer surface of the connecting part is provided with external threads. The outer diameter of the bolt head is larger than the outer diameter of the connecting part. The outer surface of the connecting part near the bolt head is provided with a groove for fitting a sealing ring. The sealing ring is embedded in the groove and abuts against the bottom of the bolt head.

7. A waterproof and oil-proof and air-permeable valve according to claim 1, characterized in that, The mesh protective layer is made of metal.

8. An electric winch comprising a housing, characterized in that The top of the enclosure is equipped with a vent valve, which is a waterproof and oil-proof vent valve as described in any one of claims 1 to 7.

Images