One-way valve capable of preventing damage to sealing ring

Abstract

The utility model discloses a one -way valve can prevent sealed ring damage, including valve body, be provided with valve cavity in the valve body, be provided with the discharge passage on one end of valve cavity, be provided with the unloading spring between unloading valve core and discharge passage, be provided with fixed hole on the other end of valve cavity, be provided with the access channel on main valve core, the upper setting of access channel has inner taper face, is provided with outer taper face on unloading valve core, is provided with sealing groove on outer taper face, is provided with sealed ring in sealing groove, is provided with anti - extrusion surface on one side surface of sealing groove, and anti - extrusion surface sets up close to unloading spring side, and anti - extrusion surface and the end clearance cooperation of main valve core, is provided with the connection channel of roll through on unloading valve core, and the connection channel sets up between sealing groove and discharge passage. Through the cooperation of main valve core and unloading valve core, sealed ring can not be pressed by main valve core and unloading valve core when working and be damaged, effectively guarantee the sealing performance of one -way valve, also effectively prevent gas or liquid backflow.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and in particular to a check valve that can prevent damage to the sealing ring. Background Technology

[0002] In liquid or gas transportation, check valves are commonly used in pipelines to prevent backflow of liquid or gas. In order to improve the sealing performance of check valves, a sealing ring is usually installed on the unloading valve core of the check valve. However, the sealing ring is easily damaged during the movement of the unloading valve core, resulting in insufficient sealing performance of the check valve and inability to prevent backflow of liquid or gas. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a one-way valve that can prevent damage to the sealing ring.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A one-way valve for preventing damage to the sealing ring includes a valve body, a main valve core, an unloading valve core, an unloading spring, and a sealing ring. The valve body has a valve cavity that mates with the unloading valve core. One end of the valve cavity has a through discharge channel. The unloading spring is positioned between the unloading valve core and the discharge channel. The other end of the valve cavity has a fixing hole that mates with the main valve core. The main valve core has a through inlet channel. The discharge end of the inlet channel has an inner conical surface. The end of the unloading valve core has an outer conical surface that mates with the inner conical surface. A sealing groove is provided on the outer conical surface. The sealing ring, which seals with the inner conical surface, is positioned in the sealing groove. An anti-extrusion surface is provided on one side of the sealing groove, located near the unloading spring. The anti-extrusion surface has a clearance fit with the end of the main valve core. The unloading valve core has a rolling-through connecting channel positioned between the sealing groove and the discharge channel.

[0006] Furthermore, an anti-detachment groove is provided between the anti-squeezing surface and the sealing groove, and the included angle between the two sides of the anti-detachment groove is θ, wherein the value of θ is in the range of 0<θ<90°.

[0007] Furthermore, the gap between the anti-squeezing surface and the end of the main valve core is L, and the value of L ranges from 0.15 to 0.25 mm.

[0008] Furthermore, a limiting ring that cooperates with the unloading spring is fixedly provided on the inner wall of the discharge channel.

[0009] Furthermore, a limiting hole is provided on the end of the unloading valve core, and the end of the unloading spring is disposed within the limiting hole.

[0010] Furthermore, one end of the connecting channel is connected to the bottom of the limiting hole, and the other end of the connecting channel penetrates the side wall of the unloading valve core.

[0011] Furthermore, a connecting pipe head is sealed inside the fixing hole, and the end of the main valve core is disposed inside the connecting pipe head.

[0012] Furthermore, the connecting pipe head, the valve body, the main valve core, and the unloading valve core are coaxially arranged.

[0013] The beneficial effects of this utility model are:

[0014] 1) In this technology, by using the main valve core and the unloading valve core in combination, the sealing ring will not be damaged by the main valve core and the unloading valve core during operation, which effectively ensures the sealing performance of the check valve and also effectively prevents gas or liquid backflow.

[0015] 2) In this technology, the anti-dislodgement groove between the anti-extrusion surface and the sealing groove can effectively prevent the sealing ring from falling out of the sealing groove during operation. Attached Figure Description

[0016] Figure 1 This is a diagram showing the internal connection structure of this check valve;

[0017] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0018] In the diagram, 1-valve body, 2-main valve core, 3-unloading valve core, 4-unloading spring, 5-sealing ring, 6-valve cavity, 7-discharge channel, 8-fixing hole, 9-inlet channel, 10-inner conical surface, 11-outer conical surface, 12-sealing groove, 13-anti-extrusion surface, 14-connecting channel, 15-anti-dislodgement groove, 16-limiting ring, 17-limiting hole, 18-connecting pipe head. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] See Figures 1-2 This utility model provides a technical solution:

[0021] A one-way valve designed to prevent damage to the sealing ring includes a valve body 1, a main valve core 2, an unloading valve core 3, an unloading spring 4, and a sealing ring 5. The valve body 1 contains a valve cavity 6 that mates with the unloading valve core 3. One end of the valve cavity 6 has a through discharge channel 7. The unloading spring 4 is positioned between the unloading valve core 3 and the discharge channel 7. The other end of the valve cavity 6 has a fixing hole 8 that mates with the main valve core 2. The main valve core 2 has a through inlet channel 9, and the discharge end of the inlet channel 9 has an inner conical surface 10. The unloading valve core 3 has an outer conical surface 11 at its end that mates with the inner conical surface 10. A sealing groove 12 is provided on the outer conical surface 11, and a sealing ring 5, which seals with the inner conical surface 10, is provided in the sealing groove 12. An anti-extrusion surface 13 is provided on one side of the sealing groove 12, located near the unloading spring 4. The anti-extrusion surface 13 has a clearance fit with the end of the main valve core 2. The unloading valve core 3 has a rolling-through connecting channel 14, which is located between the sealing groove 12 and the discharge channel 7. The valve body 1 is used to install the main valve core 2, the unloading valve core 3, the unloading spring 4, and the sealing ring 5. The main valve core 2 does not move within the valve body 1. The unloading valve core 3 works in conjunction with the unloading spring 4, and the sealing ring 5 seals the mating area between the main valve core 2 and the unloading valve core 3. During operation, the conveying medium enters through the inlet channel 9 of the main valve core 2, then pushes the unloading valve core 3 to compress the unloading spring 4, causing the sealing ring 5 to release the seal between the main valve core 2 and the unloading valve core 3. The medium continues to enter through the connection channel 14 and exits through the discharge channel 7. In the reverse direction, the medium enters through the discharge channel 7, while the main valve core 2 and the unloading valve core 3 are sealed by the sealing ring 5, preventing medium flow. When the main valve core 2 and the unloading valve core 3 approach each other, the sealing ring 5 slowly achieves a seal. Due to the clearance fit between the anti-extrusion surface 13 and the end of the main valve core 2, the sealing ring 5 will not be damaged. The sealing ring 5 is a rubber sealing ring in the prior art.

[0022] In some embodiments, an anti-detachment groove 15 is provided between the anti-extrusion surface 13 and the sealing groove 12. The included angle between the two sides of the anti-detachment groove 15 is θ, and the value of θ ranges from 0 to 90°. The commonly used range for the included angle between the two sides of the anti-detachment groove 15 is 45° to 80°, and it is often set to 60°, 70°, or 80°. This included angle effectively prevents the sealing ring 5 from falling out of the sealing groove 12 during operation.

[0023] In some embodiments, the end gap between the anti-squeezing surface 13 and the main valve core 2 is L, and the value of L ranges from 0.15 to 0.25 mm. The distance between the anti-squeezing surface 13 and the main valve core 2 can be 0.15 mm, 0.20 mm, or 0.25 mm, etc.

[0024] In some embodiments, a limiting ring 16 that cooperates with the unloading spring 4 is fixedly provided on the inner wall of the discharge channel 7. A limiting hole 17 is provided on the end of the unloading valve core 3, and the end of the unloading spring 4 is disposed in the limiting hole 17. The limiting ring 16 is coaxially and sealed to the discharge channel 7, limiting one end of the unloading spring 4, and limiting the other end of the unloading spring 4 in the limiting hole 17. The unloading spring 4 will not slide in the limiting hole 17, so that the unloading valve core 3 is subjected to uniform force.

[0025] In some embodiments, one end of the connecting channel 14 communicates with the bottom of the limiting hole 17, and the other end of the connecting channel 14 penetrates the side wall of the unloading valve core 3. The side wall of the unloading valve core 3 is provided with a plurality of through connecting channels 14, which are evenly distributed.

[0026] In some embodiments, a connecting pipe head 18 is sealed inside the fixing hole 8, and the end of the main valve core 2 is disposed inside the connecting pipe head 18. The connecting pipe head 18, valve body 1, main valve core 2, and unloading valve core 3 are coaxially arranged. The output end of the valve body 1 is directly and sealed to the conveying pipeline, and the input end of the valve body 1 is sealed to the conveying pipeline through the connecting pipe head 18. The connecting pipe head 18 and valve body 1 are threaded together for easy disassembly. The main valve core 2 has a step, which rests on the end of the connecting pipe head 18. The coaxial arrangement of the connecting pipe head 18, valve body 1, main valve core 2, and unloading valve core 3 ensures uniform movement of the unloading valve core 3 and prevents it from failing due to wear.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "setting", "installation", "connection", "fixing", "hinged" and other such terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A one-way valve that prevents damage to the sealing ring, characterized in that: The valve body (1) includes a main valve core (2), an unloading valve core (3), an unloading spring (4), and a sealing ring (5). The valve body (1) contains a valve cavity (6) that mates with the unloading valve core (3). One end of the valve cavity (6) has a through discharge channel (7). The unloading spring (4) is positioned between the unloading valve core (3) and the discharge channel (7). The other end of the valve cavity (6) has a fixing hole (8) that mates with the main valve core (2). The main valve core (2) has a through inlet channel (9). The discharge end of the inlet channel (9) has an inner conical surface (10). The end of the unloading valve core (3)... An outer conical surface (11) is provided on the upper part to cooperate with the inner conical surface (10). A sealing groove (12) is provided on the outer conical surface (11). A sealing ring (5) is provided in the sealing groove (12) to seal and cooperate with the inner conical surface (10). An anti-squeezing surface (13) is provided on one side of the sealing groove (12). The anti-squeezing surface (13) is located close to the unloading spring (4). The anti-squeezing surface (13) is clearance-fitted with the end of the main valve core (2). A rolling connection channel (14) is provided on the unloading valve core (3). The connection channel (14) is located between the sealing groove (12) and the discharge channel (7).

2. The one-way valve according to claim 1 that prevents damage to the sealing ring, characterized in that: An anti-detachment groove (15) is provided between the anti-squeezing surface (13) and the sealing groove (12). The included angle between the two sides of the anti-detachment groove (15) is θ, and the value of θ is 0<θ<90°.

3. A check valve according to claim 1 or 2 that prevents damage to the sealing ring, characterized in that: The end gap between the anti-squeezing surface (13) and the main valve core (2) is L, and the value of L ranges from 0.15 to 0.25 mm.

4. A check valve according to claim 1 or 2 that prevents damage to the sealing ring, characterized in that: A limiting ring (16) that cooperates with the unloading spring (4) is fixedly provided on the inner wall of the discharge channel (7).

5. A one-way valve according to claim 1 or 2 that prevents damage to the sealing ring, characterized in that: The unloading valve core (3) is provided with a limiting hole (17) at its end, and the unloading spring (4) is provided in the limiting hole (17) at its end.

6. A one-way valve according to claim 5 that prevents damage to the sealing ring, characterized in that: One end of the connecting channel (14) is connected to the bottom of the limiting hole (17), and the other end of the connecting channel (14) penetrates the side wall of the unloading valve core (3).

7. A check valve according to claim 1 or 2 that prevents damage to the sealing ring, characterized in that: A connecting pipe head (18) is sealed inside the fixing hole (8), and the end of the main valve core (2) is located inside the connecting pipe head (18).

8. A one-way valve according to claim 7 that prevents damage to the sealing ring, characterized in that: The connecting pipe head (18), the valve body (1), the main valve core (2) and the unloading valve core (3) are coaxially arranged.

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