Low-temperature shock-resistant electromagnetic valve sealing structure

Abstract

The utility model provides a low temperature anti -seismic electromagnetic valve sealing structure relates to electromagnetic valve technical field, including the outer gasket ring, the one end port of outer gasket ring is equipped with the port ring no.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a sealing structure for a low-temperature shock-resistant solenoid valve. Background Technology

[0002] Solenoid valve sealing structures typically employ single or combined sealing elements. For example, O-rings, star-shaped rings, or PTFE packing rings are used at the dynamic sealing points between the valve stem and valve body, while metal or elastomer gaskets are used at the valve seat. Their core function is to utilize the elastic deformation of the sealing material itself to fill the assembly gaps between components, thereby establishing an effective isolation barrier inside the solenoid valve. This prevents the controlled working medium from leaking along the valve stem axially or from the valve seat interface, while ensuring that the valve stem can move flexibly without jamming when needed, and withstands the internal working pressure and temperature fluctuations within a certain range, thus guaranteeing the basic sealing performance and operational reliability of the solenoid valve.

[0003] In existing technologies, under low-temperature conditions, due to the differences in the thermal expansion coefficients of the valve stem, valve body, and sealing components, uneven contraction occurs during the cooling process, resulting in gaps at the sealing interface or the generation of huge internal stress, leading to sealing failure or jamming of moving parts. Furthermore, traditional single-layer seals or static seals are prone to failure due to insufficient compensation capacity under low-temperature elastic decay and continuous vibration environments, exhibiting technical defects. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a low-temperature shock-resistant solenoid valve sealing structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-temperature shock-resistant solenoid valve sealing structure, comprising an outer gasket ring, a port ring 1 at one end of the outer gasket ring, an inner gasket ring 1 and an inner gasket ring 2 fitted inside the outer gasket ring, a rubber gasket ring 1 between the port ring 1 and the inner gasket ring 1, a rubber gasket ring 2 between the inner gasket ring 1 and the inner gasket ring 2, a port ring 2 fitted at one end of the outer gasket ring away from the port ring 1, and a rubber gasket ring 3 between the inner gasket ring 2 and the port ring 2.

[0006] In a preferred embodiment, the first port ring, the first inner gasket ring, the first rubber gasket ring, the second inner gasket ring, the second rubber gasket ring, the second port ring, and the third rubber gasket ring are connected by a connecting screw. The connecting screw passes through the first inner gasket ring, the first rubber gasket ring, the second inner gasket ring, the second rubber gasket ring, the second port ring, and the third rubber gasket ring, and the end of the connecting screw is threaded to the outer gasket ring.

[0007] In a preferred embodiment, the outer gasket ring, the port ring one, and the inner gasket ring one are clamped at the junction of the two balls.

[0008] In a preferred embodiment, the outer washer ring, inner washer ring one, and inner washer ring two are clamped at the junction of the outer washer ring, inner washer ring one, and inner washer ring two.

[0009] In a preferred embodiment, the second ball bearing is held at the junction of the outer gasket ring, the second inner gasket ring, and the second port ring.

[0010] In a preferred embodiment, the outer edge of the first port ring and the outer pad ring, and the outer edge of the outer pad ring and the second port ring, are both clamped together with the first ball.

[0011] In a preferred embodiment, the inner diameters of the first port ring, the first inner pad ring, the second inner pad ring, and the second port ring are the same.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention strategically arranges ball bearing 1 and ball bearing 2 at the critical junction between the outer gasket ring and the internal components, releasing these potentially destructive stresses through a small relative displacement, thus avoiding structural freeze-thaw blockage and alleviating stress coordination problems in rigid seals or simple multi-layer seal structures. This invention utilizes a multi-layered elastic sealing system, integrated by a connecting screw and comprising an inner gasket ring 1, an inner gasket ring 2, a rubber gasket ring 1, a rubber gasket ring 2, and a rubber gasket ring 3. This system not only provides a seal in the initial state but also, at low temperatures, leverages the residual elasticity of the rubber material and the multi-layered design to ensure that even if the pressure on one sealing surface decreases, the other sealing surfaces can still maintain effective contact. This alleviates the inherent problem of insufficient reliability of a single sealing interface under dynamic low-temperature conditions, thereby achieving a long service life, high reliability, and maintenance flexibility for the sealing structure in extreme low-temperature environments. Attached Figure Description

[0013] Figure 1 A schematic diagram of a low-temperature shock-resistant solenoid valve sealing structure provided by this utility model.

[0014] Figure 2 This is a split diagram of the sealing structure of a low-temperature shock-resistant solenoid valve provided by this utility model.

[0015] Figure 3 This is a half-sectional view of the sealing structure of a low-temperature shock-resistant solenoid valve provided by this utility model.

[0016] Figure 4 A half-section front view of the sealing structure of a low-temperature shock-resistant solenoid valve provided by this utility model.

[0017] Legend: 1. Outer washer ring; 2. Port ring one; 3. Inner washer ring one; 4. Rubber washer ring one; 5. Inner washer ring two; 6. Rubber washer ring two; 7. Port ring two; 8. Rubber washer ring three; 9. Ball bearing one; 10. Ball bearing two; 11. Connecting screw. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0019] like Figures 1 to 4 As shown, this utility model provides a technical solution: a low-temperature shock-resistant solenoid valve sealing structure, including an outer gasket 1, a port ring 2 at one end of the outer gasket 1, an inner gasket 3 and an inner gasket 5 embedded inside the outer gasket 1, a rubber gasket 4 between the port ring 2 and the inner gasket 3, a rubber gasket 6 between the inner gasket 3 and the inner gasket 5, and a port ring 7 embedded at the end of the outer gasket 1 away from the port ring 2. The inner diameters of the port ring 2, the inner gasket 3, the inner gasket 5, and the port ring 7 are the same, and a rubber gasket 8 is provided between the inner gasket 5 and the port ring 7. In this design, the outer gasket 1 serves as an external frame, with the inner gasket 3 and the inner gasket 5 nested inside, and the port ring 4... A rubber gasket 4 is placed between the inner gasket 2 and the inner gasket 3; a rubber gasket 6 is placed between the inner gasket 3 and the inner gasket 5; and a rubber gasket 8 is placed between the inner gasket 5 and the port ring 7, forming a multi-layered elastic sealing layer. The inner diameters of the port ring 2, inner gasket 3, inner gasket 5, and port ring 7 are the same, ensuring stable alignment when installed on the valve stem. The outer gasket 1 is fixed to the valve body, thus creating a continuous sealing interface between the valve stem and the valve body. This design utilizes the elasticity and compressibility of the rubber gaskets 4, 6, and 8 at low temperatures to compensate for material shrinkage and gap fluctuations caused by temperature changes, preventing media leakage and enhancing the reliability and durability of the seal. It is suitable for harsh low-temperature environments. In this design, ball bearing 10 is clamped at the junction of outer ring 1, port ring 2, and inner ring 3; ball bearing 10 is clamped at the junction of outer ring 1, inner ring 3, and inner ring 5; ball bearing 10 is clamped at the junction of outer ring 1, inner ring 2, and port ring 7; and ball bearing 9 is clamped between the outer edge of port ring 2 and outer ring 1, and between the outer edge of outer ring 1 and port ring 7. This design addresses low-temperature deformation by placing ball bearing 9 and ball bearing 10 at key junctions. Specifically, ball bearing 9 is clamped at the junction of outer ring 1, port ring 2, and inner ring 3; ball bearing 10 is clamped at the junction of outer ring 1, inner ring 3, and inner ring 5; and ball bearing 9 is clamped at the junction of outer ring 1 and port ring 2. 1. Roller balls 10 are clamped at the junction of inner gasket ring 2 5 and port ring 2 7. At the same time, roller balls 9 are clamped between the outer edge of port ring 2 and outer gasket ring 1, and between the outer edge of outer gasket ring 1 and port ring 2 7. These roller balls act as point contact rolling elements, allowing each gasket ring and port ring to generate a small relative displacement when shrinking at low temperature. This design releases the internal stress caused by the different thermal expansion coefficients of different materials at low temperature, and avoids the structural components from being jammed or subjected to excessive extrusion deformation due to freezing expansion or contraction. This ensures the flexibility and reliability of the entire sealing structure in low temperature environment and maintains the integrity of the main sealing system constructed by the rubber gasket rings. Furthermore, port ring 12, inner gasket ring 13, rubber gasket ring 14, inner gasket ring 25, rubber gasket ring 26, port ring 27, and rubber gasket ring 38 are connected by a connecting screw 11. The connecting screw 11 passes through inner gasket ring 13, rubber gasket ring 14, inner gasket ring 25, rubber gasket ring 26, port ring 27, and rubber gasket ring 38, and the end of the connecting screw 11 is threadedly connected to port ring 12. In this design, the connecting screw 11 passes through and connects port ring 12, inner gasket ring 13, rubber gasket ring 14, inner gasket ring 25, rubber gasket ring 26, port ring 27, and rubber gasket ring 38, and the end of the connecting screw 11 is threadedly connected to... Port ring 12 is threaded to form an axially pre-tightened, highly integrated sealing module. This design allows the fastening force provided by the connecting screw 11 to tightly press multiple gaskets and rubber gaskets together, ensuring the relative positional stability between components and the overall structural strength. At the same time, it provides uniform and necessary compression for rubber gasket 14, rubber gasket 26, and rubber gasket 38, enabling them to maintain effective sealing contact pressure even in low-temperature environments. This prevents components from loosening and failing due to vibration or pressure fluctuations, greatly improving the integrity, reliability, and long-term stability of the sealing system under harsh conditions.

[0020] In this embodiment, inner gasket ring 3 and inner gasket ring 5 serve as a rigid skeleton, alternately layered with rubber gasket ring 4, rubber gasket ring 6, and rubber gasket ring 3 8. They are integrated into a single sealing module by the axial preload applied by the connecting screw 11, thus establishing multiple continuous sealing barriers between the valve stem and the valve body. The ball bearings 10 and 9, embedded at different junctions, allow for uneven shrinkage and deformation of different material components due to differences in thermal expansion coefficients at low temperatures. Ball bearing 10, through point-contact rolling at the junctions of the outer gasket ring 1 and components such as inner gasket ring 3 and inner gasket ring 5, allows for slight radial or axial displacement of the internal components such as inner gasket ring 3 and inner gasket ring 2 5 relative to the outer gasket ring 1 via point contact rolling effect. Simultaneously, ball bearing 9, at the junctions of port ring 2 and port... The junction of ring 2 7 and outer gasket 1 also provides displacement compensation capability. In this design, connecting screw 11 ensures the structural integrity of the inner gasket and rubber gasket stack and the initial clamping force required for sealing. This allows rubber gasket 1 4, rubber gasket 2 6, and rubber gasket 3 8 to maintain sufficient elastic recovery force and contact pressure even at low temperatures to ensure the main sealing function. Furthermore, the introduction of ball 1 9 and ball 2 10 transforms the internal concentrated stress that may damage the sealing structure or cause the component to jam into a coordinated micro-displacement. This protects the rubber gasket from excessive compression or shear failure and ensures the flexibility and long-term operational reliability of the entire sealing module under low-temperature conditions. Ultimately, it achieves efficient synergy between rigid support, elastic sealing, and flexible stress release.

[0021] Working principle: like Figures 1 to 4 As shown, this utility model is installed between the valve stem and the valve body during use. The port ring 1 2, inner gasket ring 1 3, inner gasket ring 2 5 and port ring 2 7 are installed on the valve stem, while the outer gasket ring 1 is placed on the valve body. When this utility model is installed between the valve stem and the valve body, the axial preload provided by the connecting screw 11 causes the inner gasket ring 1 3, the inner gasket ring 2 5 and the port ring 1 2 and the port ring 2 7 to tightly clamp the rubber gasket ring 1 4, the rubber gasket ring 2 6 and the rubber gasket ring 3 8, causing them to undergo initial compression deformation, thereby establishing a multi-layer sealing interface between the valve stem and the valve body and generating initial contact pressure. When the ambient temperature drops and enters the low-temperature operating condition, the metal valve stem, valve body, and components such as outer gasket 1, inner gasket 1 3, inner gasket 2 5, port ring 1 2, and port ring 2 7 will shrink due to thermal expansion and contraction. At this time, the force changes. On the one hand, the fastening effect of the connecting screw 11 will try to maintain the compression state between the components. However, the difference in the shrinkage rate of different materials will cause the internal stress to redistribute. At this time, the rolling effect of ball 1 9 and ball 2 10 at the junction of the components through point contact will transform the rigid compression and jamming stress that may have formed into a coordinating effect that allows small displacement, thereby releasing the additional stress caused by the uneven shrinkage between the outer gasket 1 and the internal components, as well as between the internal components. Meanwhile, although the elastic modulus of rubber gasket 1 4, rubber gasket 2 6 and rubber gasket 3 8 may increase at low temperatures, their inherent elastic properties enable them to adaptively adjust their deformation state under the constant preload provided by the connecting screw 11, compensate for the interface gap that may increase due to the shrinkage of metal parts, thereby maintaining a sealing contact pressure within a certain range and preventing media leakage.

[0022] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A sealing structure for a low-temperature shock-resistant solenoid valve, characterized in that, The device includes an outer gasket (1), a port ring (2) at one end of the outer gasket (1), an inner gasket (3) and an inner gasket (5) are fitted inside the outer gasket (1), a rubber gasket (4) is provided between the port ring (2) and the inner gasket (3), a rubber gasket (6) is provided between the inner gasket (3) and the inner gasket (5), a port ring (7) is fitted at one end of the outer gasket (1) away from the port ring (2), and a rubber gasket (8) is provided between the inner gasket (5) and the port ring (7).

2. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The port ring 1 (2), inner pad ring 1 (3), rubber pad ring 1 (4), inner pad ring 2 (5), rubber pad ring 2 (6), port ring 2 (7) and rubber pad ring 3 (8) are connected by a connecting screw (11). The connecting screw (11) passes through the inner pad ring 1 (3), rubber pad ring 1 (4), inner pad ring 2 (5), rubber pad ring 2 (6), port ring 2 (7) and rubber pad ring 3 (8), and the end of the connecting screw (11) is threadedly connected to the outer pad ring (1).

3. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The outer pad ring (1), port ring one (2) and inner pad ring one (3) are clamped at the junction of the ball two (10).

4. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The outer washer (1), inner washer one (3) and inner washer two (5) are clamped at the junction of the outer washer ring (1), inner washer ring one (3) and inner washer ring two (5).

5. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The outer pad ring (1), the inner pad ring 2 (5) and the port ring 2 (7) hold the ball 2 (10).

6. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The outer edge of the port ring 1 (2) and the outer pad ring (1) are both clamped between the outer edge of the outer pad ring (1) and the port ring 2 (7).

7. The sealing structure of a low-temperature shock-resistant solenoid valve according to claim 1, characterized in that: The inner diameters of the port ring 1 (2), inner pad ring 1 (3), inner pad ring 2 (5) and port ring 2 (7) are the same.

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