One-way valve with injection-molded valve core

Abstract

The utility model discloses a one-way valve with an injection-molded valve element. The one-way valve comprises an inlet shell, an outlet shell, a valve element assembly and an elastic piece. The inlet shell and the outlet shell are detachably assembled together in a communicating mode, and the valve element assembly is adjustably assembled in a cavity between the inlet shell and the outlet shell through an elastic piece. The valve element assembly comprises a valve element base and a fluorinated silicone rubber sealing ring. The valve element base can be arranged in the first assembling groove of the inlet shell in a sliding mode in the direction of the central axis of the one-way valve, a fluorinated silicone rubber sealing ring is arranged at the end, facing the inlet channel, of the valve element base, and the other opposite end of the valve element base abuts against the interior of the second assembling groove of the outlet shell through an elastic piece. When the one-way valve is used, the problems that fatigue damage of a valve element rubber ring of a one-way valve in the prior art cannot be effectively improved, and meanwhile the requirement for low flow resistance in a hydraulic system cannot be guaranteed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, in particular to a one-way valve with a valve core injection-molded. Background Art

[0002] A one-way valve is also called a non-return valve or a check valve. The medium can only flow in one direction. It has the ability to conduct one-way flow and cut off the reverse direction at the same time. Since the one-way valve is an automatic working valve, it is widely used in the fields of aviation and aerospace. When the medium flows in one direction, the valve core inside the valve opens. When the medium flows in the reverse direction, the medium pressure and the weight of the valve core make the valve core act on the valve cavity, thereby cutting off the flow of the medium. Therefore, the one-way valve is a component with a simple structure, strong flow capacity and sensitive action. It is widely used in various hydraulic systems and pneumatic systems. However, in actual use, problems such as vibration of the one-way valve core, leakage caused by fatigue damage of the sealing ring and fatigue damage of the spring may occur, which will bring great harm to the normal operation of the entire system. Combined with the on-site test, the problems that occurred are mainly manifested in the following points: First, the unreasonable design of the internal structure of the one-way valve causes the flow field inside the valve to present turbulent flow when the high-speed fluid flows through the one-way valve, resulting in loss of fluid kinetic energy, which in turn affects the fluid supply speed of the hydraulic brake system; second, the rubber sealing ring of the one-way valve is repeatedly squeezed and fatigued, resulting in a decrease in the sealing reliability of the hydraulic brake system; third, the high-frequency vibration of the valve core in the one-way valve generates noise and mechanical vibration, which is also one of the main sources of noise in the pneumatic brake system.

[0003] Announcement No. CN113357409A discloses a pneumatic one-way valve structure with adjustable valve core damping, which eliminates the flutter and howling phenomenon of the pneumatic one-way valve during operation and improves the applicability of the pneumatic one-way valve. Although the high-frequency vibration problem of the pneumatic brake system is solved, the fatigue damage of the valve core rubber ring cannot be effectively improved, and the low flow resistance requirement in the hydraulic system cannot be guaranteed.

[0004] Therefore, it is an urgent problem to be solved by the utility model to provide a valve core injection molded one-way valve that can effectively solve the problem of reduced sealing reliability of rubber sealing rings in hydraulic brake factories and mines due to repeated working extrusion and turbulence inside the one-way valve during use. Utility Model Content

[0005] In view of the above technical problems, the purpose of the utility model is to overcome the problem that the fatigue damage of the valve core rubber ring of the one-way valve in the prior art cannot be effectively improved, and the low flow resistance requirement in the hydraulic system cannot be guaranteed, thereby providing a valve core injection molded one-way valve that can effectively solve the problem of reduced sealing reliability of the rubber sealing ring in hydraulic brake industry and mining due to repeated working extrusion and turbulence inside the one-way valve during use.

[0006] In order to achieve the above-mentioned object, the utility model provides a one-way valve of valve core injection molding, the one-way valve comprises: an inlet housing, an outlet housing, a valve core assembly and an elastic member; the inlet housing and the outlet housing are assembled together detachably and in communication, and the valve core assembly is adjustably assembled in a cavity between the inlet housing and the outlet housing through the elastic member; wherein,

[0007] The valve core assembly includes a valve core base and a fluorosilicone rubber sealing ring; the valve core base can be slidably arranged in the first assembly groove of the inlet shell along the central axis direction of the one-way valve, and a fluorosilicone rubber sealing ring is arranged at the end of the valve core base facing the inlet channel, and the other opposite end is abutted in the second assembly groove of the outlet shell through an elastic member.

[0008] Preferably, a plurality of sliding protrusions are arranged at intervals on the outer side surface of the valve core base, and a sliding groove corresponding to the plurality of sliding protrusions is arranged on the inner side wall of the first assembly groove, and the valve core base can be slidably assembled in the corresponding sliding groove through the sliding protrusions.

[0009] Preferably, the valve core base is partially recessed on one side of the outlet housing to form a spring limiting groove, one end of the elastic member is fixed in the spring limiting groove, and the other end of the elastic member is pressed against the bottom of the second assembly groove through an adjusting gasket.

[0010] Preferably, the bottom portion of the spring limiting groove is recessed inward to form a weight-reducing groove.

[0011] Preferably, the end portion of the valve core base toward the inlet channel is recessed inward to form a dovetail groove, and the side of the valve core base is provided with a plurality of injection holes connected to the dovetail groove, and injection molding is performed into the dovetail groove through the injection holes to form a fluorosilicone rubber sealing ring protruding from the end of the valve core base.

[0012] Preferably, the inlet housing and the outlet housing are connected by a threaded structure; wherein,

[0013] The inner part of the first assembly groove is provided with an internal thread, the outer side of the second assembly groove is provided with an external thread matching therewith, the outlet housing part is threadedly assembled into the first assembly groove, and an adjustment gap is provided between the valve core assembly and the outlet housing.

[0014] Preferably, the one-way valve further comprises: an O-ring, which is sleeved on the outlet housing and located at the outer bottom of the second assembly groove. When the outlet housing is assembled on the inlet housing, the open inner side of the first assembly groove squeezes the O-ring.

[0015] Preferably, the elastic member is a spring.

[0016] According to the above technical scheme, the beneficial effect of the one-way valve with valve core injection molding provided by the utility model when in use is as follows: In the present application, the sealing material is formed by injection molding of fluorosilicone rubber. Since the vulcanization of fluorosilicone rubber does not require the addition of acid and alkali fillers and is not corrosive, it has excellent oil and solvent resistance, good resilience and small deformation, and the rubber has good vulcanization activity, low Mooney viscosity, excellent processing performance, and can effectively improve the sealing performance. Secondly, the valve core structure is optimized, and the fluorosilicone rubber is used as the sealing surface by using the pressure of the elastic part, which also simplifies the internal structure of the valve, thereby reducing the hydraulic flow resistance of the one-way valve.

[0017] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation mode; and the parts not involved in the utility model are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of a one-way valve with a valve core injection molded provided in a preferred embodiment of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged view of point B

[0022] Figure 4 It is a schematic diagram of a vertical cross-sectional structure of a valve core assembly provided in a preferred embodiment of the utility model;

[0023] Figure 5 It is a side structural schematic diagram of a valve core assembly provided in a preferred embodiment of the utility model;

[0024] Figure 6 It is an auxiliary mold for injection molding a fluorosilicone rubber sealing ring provided in a preferred embodiment of the utility model.

[0025] Description of Reference Numerals

[0026] 1 valve core assembly 2 inlet housing

[0027] 3 outlet housing 4 elastic part

[0028] 5 Adjusting gasket 6 O-ring

[0029] 7 inlet channel 101 valve core base

[0030] 102 fluorosilicone rubber sealing ring 103 spring limit groove

[0031] 104 weight reduction groove 105 dovetail groove

[0032] 106 sliding protrusion 107 injection hole DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0034] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0035] like Figure 1-5 As shown, the utility model provides a one-way valve with a valve core injection molding, the one-way valve comprising: an inlet housing 2, an outlet housing 3, a valve core assembly 1 and an elastic member 4; the inlet housing 2 and the outlet housing 3 are detachably and communicatively assembled together, and the valve core assembly 1 is adjustably assembled in a cavity between the inlet housing 2 and the outlet housing 3 through the elastic member 4; wherein, the valve core assembly 1 comprises a valve core base 101 and a fluorosilicone rubber sealing ring 102; the valve core base 7 can be slidably arranged in a first assembly groove of the inlet housing 2 along the central axis direction of the one-way valve, and a fluorosilicone rubber sealing ring 102 is arranged at the end of the valve core base 7 facing the inlet channel 7, and the other opposite end thereof is abutted against and arranged in the second assembly groove of the outlet housing 3 through the elastic member 4.

[0036] In the above scheme, when the one-way valve is in use, after the liquid enters from the inlet channel 7 of the inlet housing 2, after the water pressure reaches the threshold value of the compression of the elastic member, it will slide against the valve core assembly 1, so that the end of the valve core base 101 is separated from the opening of the inlet channel 7, and the liquid can flow into the first assembly groove normally, and then enter the outlet housing 3 along the gap between the valve core base 101 and the first assembly groove to be discharged. When the liquid enters from the outlet channel of the outlet housing 3, it will slide against the valve core base 101, so that the end of the valve core base 101 abuts against the end of the inlet channel 7, and then cooperate with the sealing effect of the fluorosilicone rubber sealing ring 102 to achieve the phenomenon of blocking the backflow of the liquid. In the present application, the sealing material is formed by injection molding of fluorosilicone rubber. Since the vulcanization of fluorosilicone rubber does not require the addition of acid and alkali fillers and is not corrosive, it has excellent oil and solvent resistance, good resilience and small deformation, and the rubber has good vulcanization activity, low Mooney viscosity, and excellent processing performance, which can effectively improve the sealing performance. Secondly, the valve core structure is optimized, and the fluorosilicone rubber is used as the sealing surface by using the spring pressure, which also simplifies the internal structure of the valve, thereby reducing the hydraulic flow resistance of the one-way valve.

[0037] like Figure 2 As shown, the outer side surface of the valve core base 101 is provided with a plurality of sliding protrusions 106 at intervals, and the inner wall of the first assembly groove is provided with sliding grooves corresponding to the plurality of sliding protrusions 106 one by one, and the valve core base 101 can be slidably assembled in the corresponding sliding grooves through the sliding protrusions 106.

[0038] In the above scheme, the valve core base 101 is slidably assembled through the structure in which the sliding protrusion 106 is adapted to the sliding groove, which makes it convenient to adjust its position, and the movement route is also limited during the adjustment process to prevent offset problems. The gaps between the spaced sliding protrusions 106 can allow the liquid to flow normally to ensure the internal conduction effect of the one-way valve.

[0039] In a preferred embodiment of the utility model, one side portion of the valve core base 101 facing the outlet housing 3 is recessed inward to form a spring limiting groove 103, one end of the elastic member 4 is fixed in the spring limiting groove 103, and the other end of the elastic member 4 is pressed against the bottom of the second assembly groove through an adjusting gasket 5.

[0040] In the above scheme, the spring limit groove 103 can facilitate the limit assembly of the elastic member 4, and also ensure the stability of the elastic member, and facilitate the use of its compression and recovery force to adjust the position of the valve core base 101. In the experimental debugging process at the early stage of use, the preload force of the elastic member 4 is controlled by adjusting the gasket 5. For example, the outer circle of the adjustment gasket 5 is 10 wires smaller than the inner hole diameter of the outlet housing 3, and its thickness is determined by the force value test of the elastic member 4, thereby effectively controlling the hydraulic system of the one-way valve.

[0041] In a preferred embodiment of the present invention, the bottom portion of the spring limiting groove 103 is recessed inward to form a weight-reducing groove 104 .

[0042] In the above solution, the weight-reducing groove 104 can achieve a weight-reducing effect, and reduce the flow resistance of the one-way valve by optimizing the weight and structure of the valve core base.

[0043] like Figure 4 As shown, in a preferred embodiment of the present utility model, the end portion of the valve core base 101 toward the inlet channel 7 is recessed inward to form a dovetail groove 105, and the side of the valve core base 101 is provided with a plurality of injection holes 107 connected to the dovetail groove 105, and injection molding is performed into the dovetail groove 105 through the injection holes 107 to form a fluorosilicone rubber sealing ring 102 protruding from the end of the valve core base 101.

[0044] In the above scheme, the fluorosilicone rubber 102 is formed into a valve core assembly sealing surface in the dovetail groove on the top surface of the valve core base 101 by injection molding. The valve core is injection molded by using the injection hole and dovetail groove on the valve core base 101 with the help of an auxiliary mold. The sealing surface of the valve core assembly 1 after injection molding is uniform and free of bubbles. Fluorosilicone rubber 102 is a modified silicone rubber, and its high temperature resistance can reach 180-230°C. Compared with fluororubber, the physical and mechanical properties of fluorosilicone rubber at high temperature are better. At the same time, the vulcanization of fluorosilicone rubber does not require the addition of acid and alkali fillers and is non-corrosive. It has excellent oil and solvent resistance under high-precision operation requirements. Due to its good resilience and small deformation, low Mooney and excellent processing performance, fluorosilicone rubber is selected as the sealing surface material. The structure of the dovetail groove 105 can also ensure the stability of the fluorosilicone rubber sealing ring 102 after injection molding to prevent it from falling off.

[0045] In a preferred embodiment of the present utility model, a threaded connection structure is provided between the inlet shell 2 and the outlet shell 3; wherein, an internal thread is provided on an inner portion of the first assembly groove, an external thread matching the internal thread is provided on an outer side of the second assembly groove, a portion of the outlet shell 3 is threadedly assembled into the first assembly groove, and an adjustment gap is provided between the valve core base 101 and the outlet shell 3.

[0046] In the above scheme, the adjustment gap is also the stroke of the valve core base 101 movement, which is determined according to the test flow and flow resistance requirements. When the inlet pressure is higher than the outlet pressure by a certain value, that is, when a certain forward opening pressure difference is reached, the one-way valve opens and the working fluid flows; when the inlet pressure is lower than the outlet pressure by a certain value, that is, lower than a certain reverse cut-off pressure difference, the one-way valve is reversely cut off to prevent liquid leakage.

[0047] In a preferred embodiment of the present utility model, the one-way valve also includes: an O-ring 6, which is mounted on the outlet housing 3 and located at the outer bottom of the second assembly groove. When the outlet housing 3 is assembled on the inlet housing 2, the open inner side of the first assembly groove squeezes the O-ring 6.

[0048] In the above scheme, a square groove is opened on the bottom surface of the inlet shell to fix the O-ring, the inner diameter of the O-ring is larger than the outer diameter of the bottom surface of the outlet shell thread, and the outer diameter of the O-ring is smaller than the inner diameter of the groove on the bottom surface of the inlet shell. When the inlet shell 2 and the outlet shell 3 are tightened, the O-ring is squeezed, thereby ensuring the leakage of the one-way valve and preventing the working fluid from entering the valve and leaking from the thread.

[0049] In a preferred embodiment of the present invention, the elastic member 4 is a spring.

[0050] For the injection molding process of fluorosilicone rubber sealing ring, such as Figure 6 As shown, auxiliary molds are required; specific valve core injection molding process:

[0051] S1. Design the auxiliary mold: According to the angle and size of the dovetail groove of the valve core base 101, the maximum height of the fluorosilicone rubber sealing ring is about 0.8 mm. According to the maximum height of the sealing surface, the size of the auxiliary mold groove is about 0.8 mm. According to the injection holes on the side of the valve core base 101, the same injection holes are set on the side of the auxiliary mold. The specific shape is shown in Figure 6 .

[0052] S2, injection molding: the valve core base 101 and the auxiliary mold are transferred to a rubber injection molding machine, and the fluorosilicone rubber is injected into the dovetail groove of the valve core base 101 through the injection hole on the valve core base 101 connected to the auxiliary mold. After a predetermined time, the fluorosilicone rubber sealing ring of the valve core assembly 1 is molded.

[0053] S3, rubber separation: separate the redundant fluorosilicone rubber parts together with the auxiliary mold from the valve core base 7, and finally obtain the valve core assembly 1 with the fluorosilicone rubber sealing ring.

[0054] In summary, the valve core injection molded one-way valve provided by the utility model can effectively solve the problem of reduced sealing reliability of rubber sealing rings in hydraulic brake factories and mines due to repeated working extrusion and turbulence inside the one-way valve when in use.

[0055] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0057] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A valve core injection-molded one-way valve, characterized in that: The one-way valve comprises: an inlet housing (2), an outlet housing (3), a valve core assembly (1) and an elastic member (4); the inlet housing (2) and the outlet housing (3) are assembled together in a detachable and communicating manner, and the valve core assembly (1) is adjustably assembled in a cavity between the inlet housing (2) and the outlet housing (3) via the elastic member (4); wherein: The valve core assembly (1) comprises a valve core base (101) and a fluorosilicone rubber sealing ring (102); the valve core base (101) can be slidably arranged in a first assembly groove of an inlet housing (2) along the central axis direction of the one-way valve, and a fluorosilicone rubber sealing ring (102) is arranged at the end of the valve core base (101) facing the inlet channel (7), and the other end thereof is arranged in a second assembly groove of an outlet housing (3) by abutting against an elastic member (4).

2. The valve core injection molded one-way valve according to claim 1, characterized in that: The outer side surface of the valve core base (101) is provided with a plurality of sliding protrusions (106) at intervals, and the inner side wall of the first assembly groove is provided with sliding grooves corresponding to the plurality of sliding protrusions (106) one by one, and the valve core base (101) can be slidably assembled in the corresponding sliding grooves through the sliding protrusions (106).

3. The valve core injection molded one-way valve according to claim 2, characterized in that: The valve core base (101) is partially recessed on one side facing the outlet housing (3) to form a spring limiting groove (103), one end of the elastic member (4) is fixed in the spring limiting groove (103), and the other end of the elastic member (4) is pressed against the bottom of the second assembly groove via an adjusting gasket (5).

4. The valve core injection molded one-way valve according to claim 3, characterized in that: The bottom portion of the spring limiting groove (103) is recessed inwards to form a weight-reducing groove (104).

5. The valve core injection molded one-way valve according to claim 2, characterized in that: The end portion of the valve core base (101) facing the inlet channel (7) is recessed inward to form a dovetail groove (105), and a plurality of injection holes (107) connected to the dovetail groove (105) are provided on the side of the valve core base (101), and injection molding is performed into the dovetail groove (105) through the injection holes (107) to form a fluorosilicone rubber sealing ring (102) protruding from the end of the valve core base (101).

6. The valve core injection molded one-way valve according to claim 1, characterized in that: The inlet housing (2) and the outlet housing (3) are connected by a threaded structure; wherein: The inner part of the first assembly groove is provided with an internal thread, the outer side of the second assembly groove is provided with an external thread matching therewith, the outlet housing (3) is partially threadedly assembled into the first assembly groove, and an adjustable gap is provided between the valve core base (101) and the outlet housing (3).

7. The valve core injection molded one-way valve according to claim 6, characterized in that: The one-way valve further comprises: an O-type sealing ring (6), the O-type sealing ring (6) being sleeved on the outlet housing (3) and located at the outer bottom of the second assembly groove; when the outlet housing (3) is assembled on the inlet housing (2), the open inner side of the first assembly groove squeezes the O-type sealing ring (6).

8. The valve core injection molded one-way valve according to claim 1, characterized in that: The elastic member (4) is a spring.

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