One-way valve and oil passage system

Abstract

The utility model belongs to control valve technical field discloses a one-way valve and oil line system. The one-way valve includes valve body structure, plug structure, valve core structure and elastic element. The valve body structure is equipped with the valve hole of at least one end opening, and the valve hole includes the first flow channel and the second flow channel that communicate with each other. The plug structure is sealed at the opening of the valve hole and is provided with a mounting groove. The valve core structure is movably inserted into the mounting groove, the elastic element is installed between the groove bottom of the mounting groove and the valve core structure, one end of the valve core structure extends out of the mounting groove, and the valve core structure can be sealed between the first flow channel and the second flow channel under the push of the elastic element. The valve core structure can also move under the pressure of the fluid in the second flow channel to open the first flow channel and the second flow channel. The one-way valve can reduce the machining precision requirement, is convenient for processing, and can improve the overall structure and facilitate assembly.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a one-way valve and oil circuit system. Background Technology

[0002] A check valve is a fluid control device that restricts fluid flow to a single direction. Check valves are commonly used in hydraulic systems to prevent reverse flow of oil, or in pneumatic systems to prevent reverse flow of compressed air.

[0003] like Figure 1 As shown, a traditional one-way valve generally includes a plug 10, a valve body 20, a valve core 30, and a spring 40. The plug 10 is fixedly disposed at the opening of the valve port of the valve body 20, the valve core 30 is movably disposed within the valve port, and the spring 40 is sandwiched between the plug 10 and the valve core 30. Under the action of the spring 40, the valve core 30 tends to move away from the plug 10, thus disconnecting the two oil passages on the valve body 20. The valve core 30 can also move towards the plug 10 under the pressure control of the oil passages to open the two oil passages.

[0004] Traditional check valves utilize the inner wall of the valve orifice in the valve body 20 to guide the movement of the valve core 30. Therefore, the machining precision of the valve orifice is critical, increasing the difficulty of machining the valve body 20. Furthermore, installing this check valve requires sequentially assembling the valve core 30 and valve body 20, followed by sequentially assembling the spring 40 and plug 10 into the valve orifice. This assembly process is cumbersome and detrimental to overall machine assembly.

[0005] Therefore, there is an urgent need for a one-way valve and oil circuit system to solve the above problems. Utility Model Content

[0006] According to one aspect of the present invention, the objective is to provide a one-way valve that can reduce the requirements for machining accuracy, facilitate machining, improve the overall structural integrity, and facilitate assembly.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] One-way valve, including:

[0009] A valve body structure, wherein the valve body structure is provided with a valve hole open at least one end, the valve hole including a first flow channel and a second flow channel that are interconnected.

[0010] A plug structure is provided, which seals the opening of the valve hole and has an installation groove.

[0011] The valve core structure and the elastic element are provided. The valve core structure is movably inserted into the mounting groove. The elastic element is installed between the bottom of the mounting groove and the valve core structure. One end of the valve core structure extends out of the mounting groove and can be blocked between the first flow channel and the second flow channel under the pushing force of the elastic element. The valve core structure can also move under the pressure of the fluid in the second flow channel to open up the first flow channel and the second flow channel.

[0012] As a preferred embodiment of the one-way valve provided by this utility model, the valve core structure has a guide portion at one end extending into the mounting groove, and the cross-sectional area of ​​the guide portion gradually decreases along the direction close to the bottom of the mounting groove.

[0013] As a preferred embodiment of the one-way valve provided by this utility model, an inclined abutment portion is formed between the first flow channel and the second flow channel, and the inner diameter of the inclined abutment portion gradually decreases along the direction close to the second flow channel;

[0014] The valve core structure is provided with an inclined abutment at its end, and the inclined abutment can abut against the inclined abutment portion.

[0015] As a preferred embodiment of the one-way valve provided by this utility model, the valve core structure has a receiving groove at one end facing the plug structure, and the elastic element extends into the receiving groove and abuts against the bottom of the receiving groove.

[0016] As a preferred embodiment of the one-way valve provided by this utility model, the valve core structure has a flow channel that can connect the first flow channel and the receiving groove.

[0017] As a preferred embodiment of the one-way valve provided by this utility model, the flow channel includes a first branch channel and a second branch channel. The first branch channel is opened along the axis of the valve core structure and is connected to the receiving groove. The second branch channel is arranged at an angle to the first branch channel and is connected to the first flow channel.

[0018] As a preferred embodiment of the one-way valve provided by this utility model, the plug structure includes a blocking part and a connecting part. The connecting part can extend into and connect to the valve hole, and the blocking part is located outside the valve hole and can abut against the peripheral side of the opening of the valve hole.

[0019] As a preferred embodiment of the one-way valve provided by this utility model, the connecting part includes an external thread section, which can be screwed into the internal thread section of the valve hole; and / or,

[0020] The connecting part is provided with a guide section, and the cross-sectional area of ​​the guide section gradually decreases in the direction away from the blocking part.

[0021] As a preferred embodiment of the one-way valve provided by this utility model, the one-way valve further includes a sealing structure, which is arranged in a ring around the connecting part and abuts against one side of the blocking part;

[0022] A first sealing groove is provided on the inner side of the opening of the valve hole, and the sealing structure is partially embedded in the first sealing groove.

[0023] According to another aspect of the present invention, the object is to provide an oil circuit system comprising at least two oil circuits and a one-way valve as described in any of the above embodiments, the one-way valve being disposed between the two oil circuits, one of the two oil circuits being connected to the first flow channel and the other being connected to the second flow channel.

[0024] The beneficial effects of this utility model are:

[0025] The one-way valve provided by this utility model includes a valve body structure, a plug structure, a valve core structure, and an elastic element. The valve body structure has a valve orifice with at least one open end, comprising a first flow channel and a second flow channel that are interconnected. The first and second flow channels are respectively connected to corresponding oil passages in an oil circuit system. The plug structure seals the opening of the valve orifice and has an installation groove. The valve core structure is movably inserted into the installation groove. The elastic element is installed between the bottom of the installation groove and the valve core structure. One end of the valve core structure extends out of the installation groove and can be used to seal between the first and second flow channels under the pushing force of the elastic element. The valve core structure can also move under the pressure of the fluid in the second flow channel to open up the first and second flow channels. In other words, both the valve core structure and the elastic element are connected to the plug structure. The groove wall of the plug structure's installation groove can guide the movement of the valve core structure without relying on the valve orifice of the valve body structure for guidance, thereby reducing the machining accuracy requirements of the valve orifice. Furthermore, when assembling the check valve, after assembling the plug structure, valve core structure, and elastic element, only the plug structure needs to be installed into the valve hole. There is no need to install each of the above structures into the valve hole in sequence, which can improve the overall structural integrity of the check valve and help reduce the assembly difficulty. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a check valve in the prior art;

[0028] Figure 2 This is a schematic diagram of the one-way valve provided in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the valve core structure provided in Embodiment 2 of this utility model.

[0030] In the picture:

[0031] 10. Plug; 20. Valve body; 30. Valve core; 40. Spring;

[0032] 100. Valve body structure; 110. Valve hole; 111. First sealing groove; 120. First flow channel; 130. Second flow channel; 140. Inclined abutment part;

[0033] 200. Plug structure; 210. Mounting groove; 220. Sealing part; 230. Connecting part; 231. External thread section; 232. Guide section;

[0034] 300. Valve core structure; 310. Guide section; 320. Inclined abutment platform; 330. Receiving groove; 340. Flow channel; 341. First branch channel; 342. Second branch channel;

[0035] 400. Elastic element;

[0036] 500. Sealed structure. Detailed Implementation

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] Example 1

[0047] Figure 2 A schematic diagram of the one-way valve provided in Embodiment 1 of this utility model is shown. (Refer to...) Figure 2 This embodiment provides a check valve and an oil circuit system. The oil circuit system includes at least two oil circuits and the check valve provided in this embodiment. In this embodiment, the oil circuit system is described as having two oil circuits, with the check valve positioned between the two oil circuits.

[0048] The one-way valve includes a valve body structure 100, a plug structure 200, a valve core structure 300, and an elastic element 400. The valve body structure 100 has a valve port 110 with at least one open end, and the valve port 110 includes a first flow channel 120 and a second flow channel 130 that are interconnected. One of the two oil passages of the oil circuit system is connected to the first flow channel 120, and the other is connected to the second flow channel 130.

[0049] Specifically, the plug structure 200 seals the opening of the valve hole 110 and has a mounting groove 210. The valve core structure 300 is coaxially and movably inserted into the mounting groove 210, and the elastic element 400 is installed between the bottom of the mounting groove 210 and the valve core structure 300. In this embodiment, the first flow channel 120 is perpendicular to the axial direction of the mounting groove 210. One end of the valve core structure 300 extends out of the mounting groove 210 and can be blocked between the first flow channel 120 and the second flow channel 130 under the pushing force of the elastic element 400. It can also move under the pressure of the fluid in the second flow channel 130 to open the first flow channel 120 and the second flow channel 130. In other words, both the valve core structure 300 and the elastic element 400 are connected to the plug structure 200. The groove wall of the mounting groove 210 of the plug structure 200 can guide the movement of the valve core structure 300 without using the valve hole 110 of the valve body structure 100 for guidance, thereby reducing the machining accuracy of the valve hole 110. Furthermore, when assembling the check valve, after assembling the plug structure 200, the valve core structure 300, and the elastic element 400, only the plug structure 200 needs to be installed into the valve hole 110. It is not necessary to install each of the above structures into the valve hole 110 sequentially, thereby improving the overall structural integrity of the check valve and reducing assembly difficulty.

[0050] More specifically, a guide portion 310 is provided at one end of the valve core structure 300 that extends into the mounting groove 210. The cross-sectional area of ​​the guide portion 310 gradually decreases along the direction close to the bottom of the mounting groove 210. Through the above arrangement, the guide portion 310 can provide a guiding function when assembling the valve core structure 300 into the mounting groove 210, thereby improving the efficiency of assembling the valve core structure 300 into the mounting groove 210.

[0051] More specifically, an inclined abutment portion 140 is formed between the first flow channel 120 and the second flow channel 130, and the inner diameter of the inclined abutment portion 140 gradually decreases along the direction approaching the second flow channel 130. An inclined abutment platform 320 is provided at the end of the valve core structure 300, and the cross-sectional area of ​​the inclined abutment platform 320 gradually decreases along the direction approaching the second flow channel 130, and the slope and shape of the inclined abutment platform 320 can match the slope and shape of the inclined abutment portion 140. The inclined abutment platform 320 can abut against the inclined abutment portion 140. Through the cooperation of the inclined abutment platform 320 and the inclined abutment portion 140, the reliability of the valve core structure 300 in sealing between the first flow channel 120 and the second flow channel 130 can be improved.

[0052] Continue to refer to Figure 2 The valve core structure 300 has a receiving groove 330 at one end facing the plug structure 200. The elastic element 400 partially extends into the receiving groove 330 and abuts against the bottom of the receiving groove 330. By providing the receiving groove 330 on the valve core structure 300, the elastic element 400 can be accommodated, thereby improving the reliability of its connection with the valve core structure 300. It can also provide guidance when the elastic element 400 is compressed or restored, ensuring the parallelism between the deformation direction of the elastic element 400 and the axial direction of the valve core structure 300.

[0053] Specifically, the valve core structure 300 has a flow channel 340, which is connected to the first flow channel 120 and the receiving groove 330.

[0054] When there is no oil in the oil circuit system, the inclined abutment platform 320 of the valve core structure 300 presses against the inclined abutment part 140 under the elastic force of the elastic element 400, forming a conical seal and closing the one-way valve.

[0055] When oil flows through the first flow channel 120, some of the oil will enter the receiving tank 330 through the oil passage of the flow channel 340, so that the oil pressure in the receiving tank 330 is the same as the oil pressure in the first flow channel 120. The valve core structure 300 is pressed against the inclined abutment part 140 under the elastic force of the elastic element 400. At this time, the one-way valve remains closed, and the first flow channel 120 and the second flow channel 130 are disconnected.

[0056] When oil flows through the second flow channel 130, the oil pressure acts on the right end face of the valve core structure 300. When the oil pressure in the second flow channel 130 is greater than the elastic force of the elastic element 400, it can push the valve core structure 300 to compress the elastic element 400, and the valve core structure 300 moves to the left. At the same time, the oil in the receiving tank 330 is discharged to the first flow channel 120 through the flow channel 340. At this time, the one-way valve opens, and the first flow channel 120 and the second flow channel 130 are connected, and the oil can enter the first flow channel 120 from the second flow channel 130.

[0057] Optionally, in this embodiment, the flow channel 340 includes a first branch channel 341 and a second branch channel 342. The first branch channel 341 is opened along the axis of the valve core structure 300 and communicates with the receiving groove 330. The second branch channel 342 is arranged at an angle to the first branch channel 341 and communicates with the first flow channel 120. Preferably, the second branch channel 342 is perpendicular to the first branch channel 341.

[0058] More specifically, the plug structure 200 includes a sealing portion 220 and a connecting portion 230. The connecting portion 230 can extend into and connect to the valve hole 110. The sealing portion 220 is located outside the valve hole 110, and its cross-sectional area is larger than that of the connecting portion 230. An abutting ring can be formed on one side of the sealing portion 220. The abutting ring can abut against the peripheral side of the opening of the valve hole 110 to increase the tightness and reliability of the connection between the plug structure 200 and the valve body structure 100.

[0059] More specifically, the connecting portion 230 includes an external threaded section 231, which can be screwed into the internal threaded section of the valve hole 110. This screwed connection facilitates the installation of the plug structure 200 in the valve hole 110.

[0060] More specifically, the connecting portion 230 is provided with a guide section 232. The cross-sectional area of ​​the guide section 232 gradually decreases in the direction away from the sealing portion 220. In this embodiment, the guide section 232 is specifically formed at the end of the external threaded portion 231 away from the sealing portion 220. During the process of the connecting portion 230 extending into the valve hole 110, the guide section 232 provides guidance, facilitating the assembly and insertion of the two.

[0061] Preferably, the one-way valve further includes a sealing structure 500. The sealing structure 500 is annular, specifically arranged around the periphery of the connecting portion 230 and abutting against an abutment ring formed on one side of the sealing portion 220. A first sealing groove 111 is provided inside the opening of the valve hole 110, and the sealing structure 500 is partially embedded in the first sealing groove 111. A second sealing groove is provided on the periphery of the connecting portion 230 connected to the root of the sealing portion 220, and the sealing structure 500 is partially embedded in the second sealing groove. In this embodiment, the first sealing groove 111 is specifically inclined, and in the radial direction of the plug structure 200, the sealing structure 500 is sandwiched between the bottom of the first sealing groove 111 and the bottom of the second sealing groove. In the axial direction of the plug structure 200, the sealing structure 500 is sandwiched between the abutment ring and the sidewall of the second sealing groove. The above settings ensure the sealing performance of the valve orifice 110.

[0062] Example 2

[0063] This embodiment provides a one-way valve.

[0064] Figure 3 A schematic diagram of the valve core structure provided in Embodiment 2 of this utility model is shown. (Refer to...) Figure 3 The only difference between this embodiment and Embodiment 1 is the flow channel 340 opened on the valve core structure 300.

[0065] Specifically, in this embodiment, the flow channel 340 is inclined relative to the axis of the valve core structure 300. One end of the flow channel 340 is connected to the receiving groove 330, and the other end is connected to the first flow channel 120. By inclining the flow channel 340, the smoothness of oil flow between the first flow channel 120 and the receiving groove 330 can be improved, and oil residue in the flow channel 340 can be avoided.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A check valve characterized by, include: A valve body structure (100) is provided with a valve hole (110) with at least one end open, the valve hole (110) including a first flow channel (120) and a second flow channel (130) that are interconnected. A plug structure (200) is provided, which is used to seal the opening of the valve hole (110) and has an installation groove (210). The valve core structure (300) and the elastic element (400) are provided. The valve core structure (300) is movably inserted into the mounting groove (210). The elastic element (400) is installed between the bottom of the mounting groove (210) and the valve core structure (300). One end of the valve core structure (300) extends out of the mounting groove (210) and can be blocked between the first flow channel (120) and the second flow channel (130) under the pushing force of the elastic element (400). The valve core structure (300) can also move under the pressure of the fluid in the second flow channel (130) to open the first flow channel (120) and the second flow channel (130).

2. The one-way valve of claim 1, wherein The valve core structure (300) has a guide portion (310) at one end that extends into the mounting groove (210), and the cross-sectional area of ​​the guide portion (310) gradually decreases along the direction close to the bottom of the mounting groove (210).

3. The one-way valve of claim 1, wherein, An inclined abutment (140) is formed between the first flow channel (120) and the second flow channel (130), and the inner diameter of the inclined abutment (140) gradually decreases along the direction close to the second flow channel (130); The valve core structure (300) is provided with an inclined abutment platform (320) at its end, and the inclined abutment platform (320) can abut against the inclined abutment part (140).

4. The one-way valve of claim 1, wherein The valve core structure (300) has a receiving groove (330) at one end facing the plug structure (200), and the elastic element (400) extends into the receiving groove (330) and abuts against the bottom of the receiving groove (330).

5. The one-way valve according to claim 4, characterized in that, The valve core structure (300) has a flow channel (340) that can connect the first flow channel (120) and the receiving groove (330).

6. The one-way valve of claim 5, wherein, The flow channel (340) includes a first branch channel (341) and a second branch channel (342). The first branch channel (341) is opened along the axis of the valve core structure (300) and is connected to the receiving groove (330). The second branch channel (342) is arranged at an angle to the first branch channel (341) and is connected to the first flow channel (120).

7. The one-way valve according to any one of claims 1-6, wherein The plug structure (200) includes a plugging part (220) and a connecting part (230). The connecting part (230) can extend into and connect to the valve hole (110). The plugging part (220) is located outside the valve hole (110) and can abut against the peripheral side of the opening of the valve hole (110).

8. The one-way valve of claim 7, wherein, The connecting portion (230) includes an external threaded section (231), which can be screwed into the internal threaded section of the valve hole (110); and / or, The connecting part (230) is provided with a guide section (232), and the cross-sectional area of ​​the guide section (232) gradually decreases along the direction away from the blocking part (220).

9. The one-way valve of claim 7, wherein, The one-way valve also includes a sealing structure (500), which is arranged around the connecting part (230) and abuts against one side of the blocking part (220); A first sealing groove (111) is provided on the inner side of the opening of the valve hole (110), and the sealing structure (500) is partially embedded in the first sealing groove (111).

10. An oil circuit system characterized by, It includes at least two oil passages, and also includes a one-way valve as described in any one of claims 1-9, the one-way valve being disposed between the two oil passages, one of the two oil passages being connected to the first flow channel (120) and the other being connected to the second flow channel (130).

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