Novel sealing structure on three-way valve

Abstract

The utility model discloses a novel sealing structure on a three-way valve, which comprises a three-way valve body, and sealing discs are arranged in two groups of air passages which are not communicated with each other in the three-way valve body; the sealing device is characterized in that a fixing column is arranged in the middle of the lower end face of the sealing disc, the fixing column is inserted into a fixing column hole of the lower cover to fix the sealing disc, the disc face of the upper end face of the sealing disc is flatly attached to the air inlet position of the upper cover to block the air inlet hole, and therefore the air inlet position is sealed; the sealing disc and the fixing column are integrally formed, the fixing column is tightly assembled in the fixing column hole, the fixing performance is good, the fixing column cannot deform after long-term use, the fixing column is stable, the disc face of the sealing disc cannot deform, the sealing disc can be attached to the air inlet position all the time to seal the air inlet position, and the sealing disc is good in sealing effect after long-term use; the service life of the three-way valve body is long.

Description

Technical Field

[0001] This utility model relates to automotive parts, specifically to a sealing disc installed inside an L-shaped three-way valve used in an automotive braking system. Background Technology

[0002] Three-way valves are used to switch or combine two fluid paths within a single valve body and are widely used in industrial applications.

[0003] The L-shaped three-way valve used in automotive braking systems allows air to enter through one inlet (intake pipe) and exit through two outlets (outlet pipes). A soft rubber sealing disc is installed inside the valve body's air passage; the lifespan of the three-way valve depends primarily on the sealing effectiveness of this disc.

[0004] In the current technology, a fixed shaft is provided in the middle of the air inlet position inside the upper cover of the valve body; an elliptical positioning hole is provided in the middle of the corresponding air outlet position inside the lower cover of the valve body; a central through hole is provided in the middle of the sealing disc. During installation, the central through hole of the sealing disc is tightly fitted with the fixed shaft to fix the sealing disc. The fixed shaft is then inserted into the elliptical positioning hole of the lower cover, and the surface of the sealing disc fits flat against the air inlet position to seal the air inlet position. During operation, air enters through the air inlet pipe. Because the sealing disc is fixed, the gas blows the surface of the sealing disc upwards and deforms. The gas enters the air passage of the valve body from under the disc surface and enters the air outlet pipe from the air outlet position of the lower cover and is blown out. The sealing disc acts to ensure that gas can only enter through the air inlet pipe and be blown out through the air outlet pipe. When there is return air entering the air passage through the air outlet pipe, the sealing disc seals the air inlet position to prevent gas from entering the air inlet pipe.

[0005] To ensure good sealing performance, the diameter of the central through-hole of the sealing disc is generally smaller than the diameter of the fixed shaft. The central through-hole needs to be tightly fitted onto the fixed shaft to secure the sealing disc. However, this approach has drawbacks:

[0006] 1. The center through-hole is tightly fitted onto the fixed shaft using an interference fit. Over time, the center through-hole of the soft rubber sealing disc is prone to deformation, creating gaps. This allows air to pass between the fixed shaft and the center through-hole of the sealing disc. Furthermore, the surface of the sealing disc becomes uneven due to deformation, creating gaps between the sealing disc surface and the air inlet. Consequently, when return air occurs in the outlet pipe, it enters the air inlet pipe through the deformed center through-hole and the deformed disc surface, causing the three-way valve to leak and the product to fail.

[0007] 2. The oval mounting holes on the lower cover cause displacement of the fixed shaft within the mounting holes, accelerating the deformation of the central through hole.

[0008] Therefore, existing technologies need to be improved. Summary of the Invention

[0009] The present invention provides a novel sealing structure for a three-way valve to address the deficiencies in the prior art.

[0010] The present invention adopts the following technical solution.

[0011] A novel sealing structure for a three-way valve includes a three-way valve body, the three-way valve body having an upper cover and a lower cover, two sets of non-communicating air passages being provided inside the upper cover and the lower cover, and a sealing disc being provided inside the air passages.

[0012] The upper surface of the sealing disc is flat, and the lower surface has an integrally formed fixing post in the middle.

[0013] The surface of the air inlet in the upper cover is flat, and the air outlet in the lower cover has a fixing post hole in the middle; the fixing post of the sealing disc is inserted into the fixing post hole of the lower cover to fix the sealing disc. In the initial state, the upper end surface of the sealing disc is flat and fits against the air inlet of the upper cover to block the air inlet.

[0014] As a preferred embodiment: the upper cover has two air inlets and the lower cover has two corresponding air outlets. When the upper and lower covers are closed, the air inlets in the upper cover and the corresponding air outlets in the lower cover together form an air passage, and an isolation plate is provided between the two air passages.

[0015] As a preferred embodiment: the top of the fixed column hole in the air outlet extends out of the air outlet, and the periphery of the fixed column hole is provided with through air outlet holes evenly distributed; the lower cover is connected to two air outlet pipes, each of which is connected to one of the air outlets.

[0016] As a preferred embodiment: the inner cavity of the upper cover has a certain height, the surfaces of the two air inlets are flat, and multiple air inlets are evenly arranged in the air inlets; when the upper cover and the lower cover are closed, the upper surface of the sealing disc fits perfectly with the air inlet, blocking and sealing the air inlets; an air inlet pipe is connected to the upper cover, and the air inlet pipe is connected to the two air inlets respectively.

[0017] As a preferred option, the sealing disc is made of FVMQ, i.e., fluorosilicone rubber.

[0018] The beneficial effects of this utility model are as follows: Sealing discs are provided in both sets of non-communicating air passages within the three-way valve body; a fixing post is provided in the middle of the lower end face of the sealing disc, and the fixing post is tightly fitted into the fixing post hole of the lower cover to fix the sealing disc; the upper end face of the sealing disc is flatly attached to the air inlet position of the upper cover, blocking the air inlet hole, thereby sealing the air inlet position; the sealing disc and fixing post of this utility model are integrally formed, and the fixing post has good fixing performance due to its tight fit in the fixing post hole. Even after long-term use, the fixing post will not deform, ensuring stability. The sealing disc surface will not deform, allowing it to remain firmly attached to the air inlet position and seal it. The sealing disc provides good sealing performance over long-term use, ensuring a long service life for the three-way valve body. Attached Figure Description

[0019] Figure 1 This is an exploded view of the present invention;

[0020] Figure 2 This is a schematic diagram of the air inlet position of the sealing disc cover of this utility model;

[0021] Figure 3 This is a schematic diagram showing the fixing post of the sealing disc of this utility model being tightly fitted into the fixing post hole of the lower cover;

[0022] Figure 4 This is a top view of the lower cover of this utility model;

[0023] Figure 5 This is a schematic diagram of the overall appearance of this utility model.

[0024] Wherein: 100-Three-way valve body, 10-Upper cover, 11-Inlet position, 111-Inlet hole, 20-Lower cover, 21-Outlet position, 211-Fixing post hole, 212-Outlet hole, A-Air passage, A1-Isolation plate, 30-Sealing plate, 31-Panel surface, 32-Fixing post, 40-Inlet pipe, 50-Outlet pipe. Detailed Implementation

[0025] 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.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] See Figures 1-5 A novel sealing structure for a three-way valve includes a three-way valve body (100), the three-way valve body (100) having an upper cover (10) and a lower cover (20), with two sets of non-communicating air passages (A) inside the upper cover (10) and the lower cover (20), and a sealing disc (30) inside the air passages (A); characterized in that: the upper end face (31) of the sealing disc (30) is flat, and the lower end face has an integrally formed fixing post (32) in the middle; The surface of the air inlet (11) inside the upper cover (10) is flat, and the air outlet (21) of the lower cover (20) is provided with a fixing post hole (211); the fixing post (32) of the sealing disc (30) is inserted into the fixing post hole (211) of the lower cover (20) to fix the sealing disc (30). In the initial state, the disc surface (31) of the upper end of the sealing disc (30) is flatly attached to the air inlet (11) of the upper cover (10) to block the air inlet (11).

[0028] The upper cover (10) has a certain space height. The upper cover (10) is provided with two air inlets (11). The surfaces of the two air inlets (11) are flat, and multiple air inlets (111) are evenly provided in the air inlets (11).

[0029] The top of the fixed post hole (211) in the air outlet (21) of the lower cover (20) extends out of the air outlet (21), and the periphery of the fixed post hole (211) is uniformly provided with through air outlet holes (212).

[0030] The fixing post (32) of the sealing disc (30) is inserted into the fixing post hole (211) of the lower cover (20) to fix the sealing disc (30). When the upper cover (10) and the lower cover (20) are closed, the disc surface (31) of the upper end face of the sealing disc (30) is just in contact with the air inlet (11), blocking and sealing the air inlet hole (111) in the air inlet (11).

[0031] The upper cover of the three-way valve body (100) is connected to an air inlet pipe (40), which is connected to two air inlet positions (11) respectively.

[0032] The lower cover (20) of the three-way valve body (100) is connected to two air outlet pipes (50), and each air outlet pipe (50) is connected to one of the air outlet positions (21).

[0033] Working principle of this utility model:

[0034] The fixing post of the sealing disc is inserted into the fixing post hole of the lower cover and tightly fitted to fix the sealing disc. In the initial state, the upper end surface of the sealing disc is flat and fits against the air inlet of the upper cover, blocking the air inlet.

[0035] When air enters through the intake pipe, the fixing post of the sealing disc is fixed inside the fixing post hole of the lower cover. The fixing post hole is higher than the edge of the air outlet, creating a certain gap between the disc surface and the air outlet. When air enters, the air blows the surface of the soft rubber sealing disc towards the air outlet of the lower cover. Under the action of wind force, the disc surface deforms and moves away from the intake position, exposing the intake position. The air enters the air passage from the intake position and then enters the air outlet pipe through the air outlet hole. When the intake pipe stops taking in air, the soft rubber material has a strong reset function, and the disc surface automatically resets and re-attaches to the intake position, blocking the intake position.

[0036] When backflow occurs in the air outlet pipe, the disc surface flatly adheres to the air inlet position of the upper cover, blocking the air inlet position. The backflow can only make the disc surface adhere even more tightly to the air inlet position, with no gap between the disc surface and the air inlet position. The backflow cannot enter the air inlet pipe, and the sealing disc has a good sealing effect.

[0037] In this invention, the fixing post of the sealing disc is tightly fitted into the fixing post hole of the lower cover. The fixing post is responsible for fixing. Therefore, even if the fixing post and the fixing post hole are interference fit and are not related to the surface of the sealing disc, the surface of the sealing disc can always maintain its flatness.

[0038] In this invention, the sealing disc is made of FVMQ, or fluorosilicone rubber, which has better stress-bearing elastic deformation and reset function than ordinary rubber (such as fluororubber and silicone rubber). It has the characteristics of high and low temperature resistance, oil resistance, chemical resistance, and aging resistance. By closely adhering to the surface of the equipment, it forms an effective barrier to prevent fluid leakage, thereby ensuring the normal operation and efficiency of the three-way valve equipment.

[0039] The above description is merely a preferred embodiment of the present utility model, and the specific embodiments described above are not intended to limit the present utility model. Various modifications and variations can be made within the scope of the technical concept of the present utility model. All refinements, modifications, or equivalent substitutions made by those skilled in the art based on the above description are within the scope of protection of the present utility model.

Claims

1. A novel sealing structure for a three-way valve, comprising a three-way valve body (100), wherein the three-way valve body (100) is provided with an upper cover (10) and a lower cover (20), and two sets of non-communicating air passages (A) are provided in the upper cover (10) and the lower cover (20), and a sealing disc (30) is provided in the air passages (A); characterized in that: The upper end face (31) of the sealing disc (30) is flat, and the lower end face is provided with an integrally formed fixing post (32); the surface of the air inlet (11) inside the upper cover (10) is flat, and the air outlet (21) of the lower cover (20) is provided with a fixing post hole (211); the fixing post (32) of the sealing disc (30) is inserted into the fixing post hole (211) of the lower cover (20) to fix the sealing disc (30). In the initial state, the upper end face (31) of the sealing disc (30) is flatly attached to the air inlet (11) of the upper cover (10) to block the air inlet (11).

2. The novel sealing structure for a three-way valve according to claim 1, characterized in that: The upper cover (10) has two air inlets (11) and the lower cover (20) has two corresponding air outlets (21). When the upper cover (10) and the lower cover (20) are closed, the air inlets (11) in the upper cover and the corresponding air outlets (21) in the lower cover together form an air passage (A). An isolation plate is provided between the two air passages (A).

3. The novel sealing structure for a three-way valve according to claim 1, characterized in that: The top of the fixed column hole (211) in the air outlet (21) extends out of the air outlet (21), and the fixed column hole (211) is uniformly provided with through air outlet holes (212) on the periphery; the lower cover (20) is connected to two air outlet pipes (50), and each air outlet pipe (50) is connected to one of the air outlets (21).

4. The novel sealing structure for a three-way valve according to claim 1, characterized in that: The upper cover (10) has a certain height, the surfaces of the two air inlets (11) are flat, and multiple air inlets (111) are evenly arranged in the air inlets (11). When the upper cover (10) and the lower cover (20) are closed, the upper surface (31) of the sealing disc (30) is just in contact with the air inlet (11), blocking and sealing the air inlets (111) in the air inlet (11). An air inlet pipe (40) is connected to the upper cover (10), and the air inlet pipe (40) is connected to the two air inlets (11) respectively.

5. A novel sealing structure for a three-way valve according to claim 1, characterized in that: The sealing disc (30) is made of FVMQ.

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