Buckle type oil return one-way valve

Abstract

The utility model relates to a buckle type oil return one-way valve which comprises a first valve body and a second valve body which are connected through a buckle, the two valve bodies are buckled with each other to form a valve cavity, the two valve bodies are provided with through holes, a valve plate capable of moving freely is arranged in the valve cavity, and the valve plate is provided with a through hole. The first valve body or the second valve body is provided with a supporting part which prevents the valve plate from being attached to the through hole in the valve body in a sealed mode. The valve plate capable of moving freely is used as a core component of the one-way valve, the one-way valve has the advantages of being good in sealing performance, simple in structure and long in service life, the first valve body and the second valve body are connected through the buckle, assembly difficulty is reduced, and the whole one-way valve is small in size, simple in structure, not prone to damage, low in cost and convenient to use. The utility model is suitable for the field of crankcase oil return one-way valves.

Description

Technical Field

[0001] The utility model belongs to the field of oil return one-way valves, and in particular relates to a snap-on type oil return one-way valve. Background Art

[0002] The oil return check valve is a common valve in an engine's crankcase ventilation system. After separating the oil and gas from the crankcase blowby gases, the engine needs to return the oil to the crankcase. The check valve is often used to prevent reverse flow of oil, or to prevent reverse flow of air in the crankcase ventilation system. The medium flowing through the check valve can only flow along the inlet, not the outlet. To prevent backflow of the medium in the pipeline, the check valve relies on the pressure of the circulating medium to open and close the valve.

[0003] Existing oil return check valves generally adopt the spring-type check valve structure commonly seen on the market, or adopt an elastic diaphragm structure. The spring-type check valve structure generally remains normally closed, has a poor oil return effect, has many parts, and is difficult to assemble. The elastic diaphragm has a short service life under frequent pressure changes. Utility Model Content

[0004] The purpose of the utility model is to provide a snap-on oil return one-way valve in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A snap-on oil return one-way valve comprises a first valve body and a second valve body connected by a snap, wherein the two valve bodies are snapped together to form a valve cavity, both valve bodies are provided with a through hole, a freely movable valve plate is arranged in the valve cavity, and the first valve body or the second valve body is provided with a support portion that prevents the valve plate from sealingly fitting with the through hole on the valve body.

[0007] As a further optimization scheme of the present invention, a first through hole is provided through the surface of the first valve body, and a second through hole is provided through the surface of the second valve body, wherein the support part is provided on the second valve body, and the diameter of the valve plate is larger than the first through hole. The valve plate blocks the flow of fluid after sealing and fitting with the first through hole. By setting a free valve plate, the first through hole is immediately closed when there is blowby pressure. Therefore, the diameter of the valve plate needs to be larger than the first through hole to achieve the effect of covering the first through hole. Furthermore, since the valve plate moves freely in the valve cavity, the thickness of the valve cavity should be smaller than the diameter of the valve plate to prevent the valve plate from tilting and getting stuck, and when one end of the valve plate contacts the side wall of the valve cavity, the first through hole is still within the coverage range of the valve plate.

[0008] As a further optimization scheme of the present invention, a continuous rib is provided around the first through hole on one side of the first valve body close to the valve cavity, and the rib cooperates with the valve plate to improve the sealing performance. By setting the rib to cooperate with the valve plate, the sealing effect is effectively improved.

[0009] As a further optimization solution of the present invention, the convex rib is circular and has a height greater than 0.2 mm. The circular convex rib has a better fitting effect and better sealing when blowby occurs.

[0010] As a further optimization scheme of the present invention, the support portion is a non-continuous segmented protrusion and is arranged around the second through hole. The side of the second valve body close to the valve cavity is recessed toward the second through hole. When returning the oil, when the blowby gas pressure decreases, the oil in the first valve body drops due to gravity. In order to facilitate the oil to leave the valve cavity and enter the second through hole, a recessed surface is provided around the second through hole to facilitate the oil to flow back.

[0011] As a further optimization scheme of the present invention, the clip is a single-sided beveled protrusion arranged on the outer side surface of one of the valve bodies, which is engaged with the slot arranged on the surface of the other valve body. By setting this type of clip, the installation effect can be improved, and the entire oil return one-way valve can be made light, compact and easy to assemble.

[0012] As a further optimization scheme of the present invention, the groove is an inverted U-shaped groove structure surrounding the valve body. By distributing the groove and the buckle around the valve body, the sealing effect between the two valve bodies can be improved. Furthermore, the groove and the buckle can be set to an arc shape in the circumferential direction of the valve body.

[0013] The beneficial effects of the present invention are:

[0014] The utility model sets a freely movable valve plate as the core component of the one-way valve, which has the advantages of good sealing, simple structure and long service life. The first valve body and the second valve body are connected by a snap buckle, which reduces the difficulty of assembly, making the entire one-way valve small in size, simple in structure, not easy to break, and low in cost. It is suitable for application in the field of crankcase oil return one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This utility model Figure 1 Exploded view of the parts.

[0017] Figure 3 It is a cross-sectional schematic diagram of the present utility model.

[0018] Figure 4 This is a schematic diagram of the first valve body of the present utility model.

[0019] Figure 5 It is a schematic diagram of the second valve body of the present utility model.

[0020] In the figure: 1. first valve body; 11. buckle; 12. rib; 13. first through hole; 14. valve cavity; 2. valve plate; 3. second valve body; 31. support portion; 32. slot; 33. second through hole. DETAILED DESCRIPTION

[0021] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Example 1

[0023] like Figure 1-5 As shown, a snap-on oil return one-way valve includes a first valve body 1 and a second valve body 3 connected by a snap 11, wherein the two valve bodies are snapped together to form a valve cavity 14, and both valve bodies are provided with a through hole. The valve cavity 14 is formed with an end wall and a side wall by the first valve body 1, and the other end wall is formed by the second valve body 3. A freely movable valve plate 2 is arranged in the valve cavity 14, and a support portion 31 is provided on the first valve body 1 or the second valve body 3 to prevent the valve plate 2 from sealing with the through hole on the valve body. In this embodiment, the first valve body 1 and the second valve body 3 are set to be cylindrical, and the valve plate 2 is also set to be a circular plate.

[0024] This solution sets a freely movable valve plate 2 as the core component of the one-way valve, which has the advantages of good sealing, simple structure and long service life. The first valve body 1 and the second valve body 3 are connected by a snap fastener, which reduces the difficulty of assembly, making the entire one-way valve small in size, simple in structure, not easy to break, and low in cost. It is suitable for application in the field of crankcase return oil one-way valve. Specifically, the bottom of the valve plate 2 bears the blowby pressure of the crankcase, while the upper end of the valve plate 2 bears the dead weight of the oil after oil and gas separation. Therefore, during normal operation of the engine, the pressure difference on both sides of the valve plate 2 is small, reducing the deformation of the valve plate 2 caused by the large pressure difference, and it can move freely in the valve cavity 14 without causing a certain part to be deformed by continuous force.

[0025] A first through hole 13 is provided through the surface of the first valve body 1, and a second through hole 33 is provided through the surface of the second valve body 3, wherein the support portion 31 is provided on the second valve body 3, and the diameter of the valve disc 2 is larger than the first through hole 13. The valve disc 2 blocks the flow of fluid after being sealed and fitted with the first through hole 13. By setting a free valve disc 2, the first through hole 13 is immediately closed when there is blowby pressure. Therefore, the diameter of the valve disc 2 needs to be larger than the first through hole 13 to cover the first through hole 13. Furthermore, since the valve disc 2 moves freely in the valve cavity 14, the thickness of the valve cavity 14 should be smaller than the diameter of the valve disc 2 to prevent the valve disc 2 from tilting and getting stuck, and when one end of the valve disc 2 contacts the side wall of the valve cavity 14, the first through hole 13 is still within the coverage range of the valve disc 2.

[0026] Furthermore, in order to improve the sealing performance of the valve disc 2 after being fitted to the first valve body 1, a continuous rib 12 is provided around the first through hole 13 on the side of the first valve body 1 close to the valve cavity 14. The rib 12 cooperates with the valve disc 2. Accordingly, when the valve disc 2 moves to any position in the valve cavity 14, the valve disc 2 needs to have a size that covers the rib 12.

[0027] Specifically, in this embodiment, the rib 12 is set to be circular, and the height is greater than 0.2 mm. The circular rib 12 has a better fitting effect and better sealing when blowby occurs.

[0028] The support portion 31 is a non-continuous segmented protrusion and is arranged around the second through hole 33. The side of the second valve body 3 close to the valve cavity 14 is recessed towards the second through hole 33. When returning the oil, when the blowby gas pressure decreases, the oil in the first valve body 1 drops due to gravity. In order to facilitate the oil to leave the valve cavity 14 and enter the second through hole 33, this solution provides a recessed surface around the second through hole 33 to facilitate oil reflux.

[0029] The clip 11 is a single-sided beveled protrusion provided on the outer surface of one of the valve bodies. In this embodiment, the clip 11 is provided on the surface of the first valve body 1 and is interlocked with the slot 32 provided on the surface of the second valve body 3. The slot 32 is an inverted U-shaped groove structure surrounding the second valve body 3. By providing this type of clip 11 and slot 32, the installation effect can be improved, and the entire oil return check valve can be made lightweight and compact, easy to assemble. By distributing the slot 32 and clip 11 around the valve body, the force effect between the two valve bodies can be improved. Furthermore, the slot 32 and clip 11 can be configured as an arc in the circumferential direction of the valve body.

[0030] The specific implementation method is as follows: after the blowby gas in the crankcase is separated from the oil and gas, the engine oil flows back into the first valve body 1, enters the valve cavity 14 through the first through hole 13, and enters the second through hole 33 through the gap between the support parts 31, and finally flows back into the crankcase. When the blowby gas pressure in the crankcase increases in stages, the valve plate 2 is lifted up and fits on the rib 12, so as to achieve the effect of preventing the blowby gas from flowing back. After the blowby gas pressure is reduced, the dead weight of the engine oil and the valve plate 2 causes the return oil one-way valve to open, and the engine oil flows back into the crankcase.

[0031] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A snap-on oil return one-way valve, characterized by: The invention comprises a first valve body (1) and a second valve body (3) connected by a snap fastener (11), wherein the two valve bodies are snapped together to form a valve cavity (14), both valve bodies are provided with a through hole, a freely movable valve plate (2) is provided in the valve cavity (14), and the first valve body (1) or the second valve body (3) is provided with a support portion (31) for preventing the valve plate (2) from sealingly fitting with the through hole on the valve body.

2. The snap-on oil return one-way valve according to claim 1, characterized in that: A first through hole (13) is provided through the surface of the first valve body (1), and a second through hole (33) is provided through the surface of the second valve body (3), wherein the support portion (31) is provided on the second valve body (3), the diameter of the valve plate (2) is larger than the first through hole (13), and the valve plate (2) blocks the flow of fluid after being sealed and fitted with the first through hole (13).

3. The snap-on oil return one-way valve according to claim 2, characterized in that: A continuous rib (12) is provided around the first through hole (13) on one side of the first valve body (1) close to the valve cavity (14); the rib (12) cooperates with the valve plate (2) to improve sealing performance.

4. The snap-on oil return one-way valve according to claim 3, characterized in that: The convex rib (12) is circular and has a height greater than 0.2 mm.

5. The snap-on oil return one-way valve according to claim 2, characterized in that: The support portion (31) is a discontinuous segment-shaped protrusion and is arranged around the second through hole (33). The side of the second valve body (3) close to the valve cavity (14) is recessed in the direction of the second through hole (33).

6. The snap-on oil return one-way valve according to claim 1, characterized in that: The buckle (11) is a single-sided oblique angle protrusion provided on the outer side of one valve body, and is mutually engaged with a clamping groove (32) provided on the surface of the other valve body.

7. The snap-on oil return one-way valve according to claim 6, characterized in that: The clamping groove (32) is an inverted U-shaped groove structure surrounding the valve body.

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