A medium switching valve that avoids damage to the sealing ring

Abstract

This utility model discloses a medium switching valve that avoids damage to the sealing ring. Its features include: a sealing ring that seals with the outer circumference of the valve core within the outlet; a valve retainer ring that fits inside the outlet, sleeves the sealing ring, and abuts against the pressure cap to limit the sealing ring's position; and a second sealing ring embedded in the outer circumference of the valve retainer ring and sealingly connected to the inner wall of the outlet. By placing the sealing ring at the root of the outlet of the valve body and covering the internal sharp corners, this utility model ensures that the valve core completely avoids sharp parts when rotating, fundamentally eliminating the risk of the seal being scratched by sharp corners. It eliminates the traditional baffle ribs located in the flow channel of the valve body, with the lateral valve retainer ring providing support, ensuring unobstructed flow and effectively increasing the medium flow rate. The valve retainer ring, through its retaining groove and abutment against the pressure cap, provides all-around rigid limitation of the sealing ring, effectively suppressing its deformation and displacement under medium pressure, and significantly extending the service life of the sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of switching valve technology, specifically to a medium switching valve that avoids damage to the sealing ring. Background Technology

[0002] In fluid transport systems, the switching valve is a key component controlling the on / off state and flow direction of the medium, and its sealing performance directly affects the system's operational stability. Existing medium switching valves typically rely on sealing rings for sealing, but this presents several problems in practical use: First, the sealing ring is usually directly installed at the outlet port of the valve core, and the baffles designed to reduce sealing ring scratches are located in the center of the outlet, directly obstructing flow, reducing the effective flow area, and leading to a decrease in flow rate. Second, the sharp angles formed at the multi-channel connections within the valve core cause the sealing ring on the valve core to repeatedly scrape against these angles during valve core rotation, resulting in cutting and wear of the sealing ring, which in turn leads to sealing failure and medium leakage. These problems not only affect the normal operation of the system but also require frequent replacement of the sealing rings, increasing maintenance costs and introducing downtime risks. Therefore, a medium switching valve designed to avoid sealing ring damage is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a medium switching valve that avoids damage to the sealing ring in order to solve the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a medium switching valve that avoids damage to the sealing ring, comprising a valve body, a valve core disposed within the valve body, a driver connected to the valve core and used to drive the valve core to rotate, outlets disposed on both sides of the valve body, and an inlet disposed on the valve body and communicating with the outlets; both the inlet and outlet are provided with a plurality of sealing rings I for sealing the connection between the pipeline and the inner wall of the valve body, a pressure cap inserted into the inlet and outlet and connected to their ends, and a retaining claw snapped into the pressure cap; characterized in that: the outlet is further provided with a sealing ring that seals with the outer circumferential surface of the valve core, a valve retainer ring disposed within the outlet and sleeved with the sealing ring and abutting against the pressure cap for limiting the sealing ring, and a sealing ring II embedded on the outer circumferential surface of the valve retainer ring and sealingly connected to the inner wall of the outlet, one end of the valve retainer ring being provided with a retaining ring groove for installing and limiting the sealing ring.

[0005] Preferably, the valve core is fitted with a fixing bracket that engages with the valve body to axially fix the valve core.

[0006] Preferably, a sealing ring is embedded on the outer circumferential surface of the valve core.

[0007] Preferably, the valve core is provided with a flow channel that communicates with the water inlet and one of the water outlets.

[0008] Preferably, the water outlet port of the flow channel is provided with an arc-shaped sealing surface that rotatably contacts the sealing ring.

[0009] Preferably, the valve body has an annular groove for connecting to the fixing frame at one end near the valve core.

[0010] Preferably, the outer circumferential surface of the valve core and the outer circumferential surface of the valve retaining ring are provided with annular grooves for embedding sealing ring two and sealing ring three.

[0011] The beneficial effects of this utility model are as follows: By setting the sealing ring at the root of the outlet of the valve body and covering the internal sharp corners, the valve core can completely avoid the sharp parts when rotating, fundamentally eliminating the risk of the seal being scratched by the sharp corners; the baffle ribs in the flow channel of the valve body are eliminated, and the support function is achieved by the lateral valve retaining ring, ensuring unobstructed flow and effectively increasing the medium flow rate; the valve retaining ring provides all-round rigid limitation of the sealing ring through the retaining ring groove and the contact with the gland, effectively suppressing its deformation and displacement under medium pressure, and significantly extending the service life of the sealing ring;

[0012] By setting the arc-shaped sealing surface, when the end of the sealing ring contacts the arc-shaped sealing surface on the valve core flow channel, the friction of the sharp corners at the end of the flow channel to the sealing ring is avoided, ensuring the sealing effect while preventing the sealing ring from being damaged due to friction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0015] Figure 3 This is a schematic cross-sectional view of the present invention;

[0016] Figure 4 This is a schematic diagram of the valve body structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the snap-fit ​​structure of the valve retaining ring of this utility model;

[0018] Figure 6 This is a schematic diagram of the thread structure of the valve retaining ring of this utility model;

[0019] Figure 7 This is a schematic diagram of the valve core structure of this utility model.

[0020] Legend: 1. Valve body; 101. Annular groove; 2. Valve core; 21. Flow channel; 22. Arc-shaped sealing surface; 23. Annular groove; 3. Actuator; 4. Outlet; 5. Inlet; 6. Sealing ring one; 7. Gland; 8. Claw; 9. Sealing ring; 10. Valve retainer ring; 1001. Claw groove; 11. Sealing ring two; 12. Fixing bracket; 13. Sealing ring three. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, further illustrates a medium switching valve for preventing damage to the sealing ring according to this utility model.

[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0023] See appendix Figure 1-7 As shown, this embodiment of a medium switching valve for avoiding damage to the sealing ring includes a valve body 1, a valve core 2 disposed within the valve body 1, a driver 3 connected to the valve core 2 and used to drive the valve core 2 to rotate, outlets 4 disposed on both sides of the valve body 1, and an inlet 5 disposed on the valve body 1 and communicating with the outlets 4; both the inlet 5 and the outlet 4 are provided with a plurality of sealing rings 6 for sealing the connection between the pipeline and the inner wall of the valve body 1, a pressure cap 7 inserted into the inlet 5 and the outlet 4 and connected to their ends, and a claw 8 snapped into the pressure cap 7; the outlet 4 is characterized by: a sealing ring 9 that seals with the outer circumferential surface of the valve core 2, a valve retainer ring 10 disposed within the outlet 4 that sleeves the sealing ring 9 and abuts against the pressure cap 7 to limit the sealing ring 9, and a second sealing ring 11 embedded on the outer circumferential surface of the valve retainer ring 10 and sealingly connected to the inner wall of the outlet 4, and one end of the valve retainer ring 10 is provided with a retaining groove 1001 for installing and limiting the sealing ring 9.

[0024] The valve retainer ring 10 is installed in the outlet 4 of the valve body 1 by snapping, ultrasonic pressing, or threading. The sealing ring 9 is made of silicone material. The valve retainer ring 10 has several venting grooves. The actuator 3 is a manual wrench or an electric actuator, and the actuator 3 is equipped with a special-shaped drive head that can be inserted into the valve core 2 and drive it to rotate. The pressure cap 7 is installed at the end of the valve body 1 by ultrasonic pressing or threading. The sealing ring 9 is set at the root of the outlet 4 of the valve body 1, completely covering the sharp corner formed at the intersection of the flow channels in the valve body 1, thereby preventing the sharp corner from causing wear to the sealing ring 9. One end of the valve retainer ring 10 is machined with a retaining ring groove 1001, and one end of the sealing ring 9 is embedded therein, which can effectively limit the axial and radial movement of the sealing ring 9, avoid its deformation or displacement under the action of medium pressure, and thus reduce the damage to the sealing ring 9. The sealing ring 11 is embedded on the outer circumference of the valve retainer ring 10 and is sealed to the inner wall of the outlet 4, further strengthening the seal between the two and preventing the medium from leaking from the gap.

[0025] By placing the sealing ring 9 at the base of the outlet 4 of the valve body 1 and covering the internal sharp corners, the valve core 2 can completely avoid sharp parts when rotating, fundamentally eliminating the risk of the seal being scratched by sharp corners; the baffle ribs in the flow channel of the valve body 1 are eliminated, and the lateral valve retainer ring 10 provides support, ensuring unobstructed flow and effectively increasing the medium flow rate; the valve retainer ring 10 provides all-round rigid restraint for the sealing ring 9 through the retaining ring groove 1001 and the contact with the gland 7, effectively suppressing its deformation and displacement under medium pressure, and significantly extending the service life of the sealing ring 9.

[0026] See appendix Figure 1-3 As shown, a fixing bracket 12 is sleeved on the valve core 2 and snapped onto the valve body 1 to achieve axial fixation of the valve core 2; a sealing ring 13 is embedded on the outer circumferential surface of the valve core 2; the valve core 2 and the sealing ring 9 rotate in cooperation and are the core components for achieving switching of media flow direction; the fixing bracket 12 is sleeved on one end of the valve core 2 and snapped onto the end of the valve body 1, which can axially fix the valve core 2 and ensure stable rotation of the valve core 2; the valve core 2 can be driven to rotate by the rotation driver 3; the sealing ring 13 embedded on the outer circumferential surface of the valve core 2 and sealed to the inner wall of the valve body 1 can prevent the media from leaking from the gap between the valve core 2 and the valve body 1.

[0027] See appendix Figure 3 , 7As shown, the valve core 2 is provided with a flow channel 21 that communicates with the inlet 5 and one of the outlets 4 on one side; the outlet port of the flow channel 21 is provided with an arc-shaped sealing surface 22 that rotates and contacts the sealing ring 9; when the driver 3 drives the valve core 2 to rotate, the flow channel 21 rotates accordingly, thereby achieving selective communication between the inlet 5 and the outlets 4 on both sides, and achieving the purpose of switching the flow direction of the medium; through the setting of the arc-shaped sealing surface 22, when the end of the sealing ring 9 contacts the arc-shaped sealing surface 22 on the flow channel 21 of the valve core 2, the sharp corners of the end of the flow channel 21 are avoided from rubbing against the sealing ring 9, ensuring the sealing effect while avoiding damage to the sealing ring 9 due to friction.

[0028] See appendix Figure 4 As shown, the valve body 1 has an annular groove 101 connected to the fixing frame 12 at one end near the valve core 2; the fixing frame 12 is inserted into the valve body 1 and engaged in the annular groove 101 of the valve body 1 to achieve axial positioning of the valve core 2, effectively preventing axial movement of the valve core 2 and ensuring the stability of valve operation.

[0029] See appendix Figure 5-7 As shown, both the outer circumferential surface of the valve core 2 and the outer circumferential surface of the valve retainer ring 10 are provided with annular grooves 23 for embedding sealing ring 21 and sealing ring 313; the annular groove 23 on the valve retainer ring 10 provides an installation position for sealing ring 21, and the annular groove 23 on the valve core 2 provides an installation position for sealing ring 312; ensuring that sealing ring 21 and sealing ring 313 can be stably installed on the valve retainer ring 10 and the valve core 2, and sealed to the inner wall of the valve body 1, so as to better perform the sealing function.

[0030] In the use of this utility model, when it is necessary to switch the flow direction of the medium, the operator rotates the driver 3. The driver 3 drives the valve core 2 connected to it to rotate inside the valve body 1. During the rotation of the valve core 2, the internal flow channel 21 rotates accordingly. When the flow channel 21 rotates to connect with the inlet 5 and one of the outlets 4, the medium enters from the inlet 5 and flows out from the corresponding outlet 4 through the flow channel 21. During this process, the sealing ring 1 6 seals the connection between the pipe and the inner wall of the valve body 1, the sealing ring 2 11 seals the valve retainer ring 10 and the inner wall of the outlet 4, and the sealing ring 10 and the valve retainer ring 11 seal the connection between the pipe and the inner wall of the valve body 1. The gap between the inner walls of the outlet; the sealing ring 13 seals the valve core 2 and the inner wall of the valve body 1, sealing the gap between the valve core 2 and the inner wall of the valve body 1 to ensure that the medium does not leak; the sealing ring 9 rotates and contacts the arc-shaped sealing surface 22 of the valve core 2 to ensure the seal between the flow channel 21 and the outlet 4, while reducing friction with sharp parts; the valve retainer ring 10 limits the sealing ring 9 through the retaining ring groove 1001, and in conjunction with the contact with the pressure cover 7, prevents the sealing ring 9 from shifting or deforming; the fixing frame 12 and the annular retaining groove 101 fix and position the valve core 2 to ensure the stable operation of the entire device.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A medium switching valve for avoiding damage to sealing rings, comprising a valve body (1), a valve core (2) disposed within the valve body (1), a driver (3) connected to the valve core (2) and used to drive the valve core (2) to rotate, outlets (4) disposed on both sides of the valve body (1), and an inlet (5) disposed on the valve body (1) and communicating with the outlets (4); wherein the inlet (5) and the outlet (4) are each provided with a plurality of sealing rings (6) for achieving a sealing connection between the pipeline and the inner wall of the valve body (1), a pressure cap (7) inserted into the inlet (5) and the outlet (4) and connected to their ends, and a claw (8) snapped into the pressure cap (7); characterized in that: The outlet (4) is also provided with a sealing ring (9) that seals with the outer circumferential surface of the valve core (2), a valve retainer (10) that is sleeved with the sealing ring (9) and abuts against the pressure cap (7) to limit the sealing ring (9), and a second sealing ring (11) that is embedded on the outer circumferential surface of the valve retainer (10) and seals with the inner wall of the outlet (4); one end of the valve retainer (10) is provided with a retaining groove (1001) for installing and limiting the sealing ring (9).

2. The media switch valve of claim 1, wherein: The valve core (2) is fitted with a fixing bracket (12) that engages with the valve body (1) to axially fix the valve core (2).

3. The media switch valve of claim 2, wherein: The valve core (2) is provided with a sealing ring three (13) embedded on its outer circumferential surface.

4. The media switch valve of claim 3, wherein: The valve core (2) is provided with a flow channel (21) that communicates with the inlet (5) and the outlet (4) on one side.

5. A medium switching valve for avoiding damage to the sealing ring according to claim 4, characterized in that: The outlet port of the flow channel (21) is provided with an arc-shaped sealing surface (22) that rotates and contacts the sealing ring (9).

6. The media switch valve of claim 2, wherein: The valve body (1) has an annular groove (101) at one end near the valve core (2) that is connected to the fixing frame (12).

7. The media switch valve of claim 6, wherein: The outer circumferential surface of the valve core (2) and the outer circumferential surface of the valve retainer (10) are provided with annular grooves (23) for embedding sealing ring two (11) and sealing ring three (13).

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