Check valve capable of preventing sealing ring from falling off

Abstract

The check valve capable of preventing the sealing ring from falling off comprises a valve body and a valve plate, the valve body is arranged in a circular ring shape, the valve plate is rotationally arranged in the valve body through a rotating shaft and used for opening and closing a fluid channel in the middle of the valve body, a step face is arranged on the edge of the fluid channel, and an annular dovetail groove is formed in the step face. A sealing ring is clamped in the annular dovetail groove, one end of the sealing ring is tightly attached to the bottom of the annular dovetail groove, the cross section of the sealing ring is in a trapezoid shape matched with the annular dovetail groove, the other end of the sealing ring protrudes out of the step face to form an abutting portion, and the abutting portion is used for abutting against the valve plate. According to the check valve, medium backflow can be effectively prevented, it can be guaranteed that the sealing ring cannot fall off in the using process, and therefore the using effect and safety of the check valve are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and particularly relates to a check valve for preventing disc detachment. Background Art

[0002] A check valve is an automatic valve used to prevent the reverse flow of the medium, which is widely used in industrial pipeline systems. Its working principle is based on the flow direction of the medium. When the medium flows in the specified direction, it is opened under the action of the medium force and allows the medium to pass through; when the medium flows reversely, the valve plate quickly closes under the action of its own weight and the reverse force of the medium, cutting off the flow, so as to achieve the purpose of preventing the reverse flow of the medium. Some check valves also use springs to assist in closing to ensure quick reset when the medium stops flowing.

[0003] To ensure the sealing performance, currently, a sealing ring is provided on the valve seat, and the sealing is achieved through the close contact between the sealing ring and the valve plate. In the actual production process, for the installation link of the sealing ring, Figure 1 As shown in the figure, generally, an annular installation groove 11 is provided on the valve seat 1, and then the sealing ring 5 is installed in the annular installation groove 11. However, in this installation method, due to the lack of limitation on the sealing ring 5, the sealing ring 5 may fall off from the annular installation groove 11 during actual use, thus affecting the use effect of the check valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a check valve for preventing the sealing ring from falling off, so as to solve the above problems existing in the current check valve.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A check valve for preventing the sealing ring from falling off, comprising a valve body and a valve plate. The valve body is arranged in a circular ring shape, and the valve plate is rotatably arranged in the valve body through a rotating shaft for opening and closing the fluid passage in the middle of the valve body. A step surface is arranged at the edge of the fluid passage, and an annular dovetail groove is arranged on the step surface. A sealing ring is clamped in the annular dovetail groove. Among them, one end of the sealing ring is closely attached to the bottom of the annular dovetail groove, and the cross-section of the sealing ring is trapezoidal and adapted to the annular dovetail groove. The other end of the sealing ring protrudes from the step surface to form an abutting portion, and the abutting portion is used for abutting against the valve plate.

[0007] Further, a plurality of first grooves are circumferentially arranged at the bottom of the annular dovetail groove, and a plurality of second grooves are circumferentially arranged on the side surface of the sealing ring that abuts against the bottom of the annular dovetail groove. The first grooves and the second grooves are both used for accommodating an adhesive for bonding the sealing ring.

[0008] Further, a plurality of insertion holes are circumferentially arranged at the bottom of the annular dovetail groove. On one side of the sealing ring that abuts against the bottom of the annular dovetail groove, a plurality of insertion posts are extended outwards. The insertion posts are used to be inserted into the insertion holes after the sealing ring is installed in the annular dovetail groove.

[0009] Further, a contact groove for cooperating with and abutting against the abutting portion is circumferentially arranged at the edge of the valve plate.

[0010] Further, the inner wall of the contact groove extends along the axial direction of the valve plate, and the width of the contact groove is greater than the width of the abutting portion, so that the abutting portion is located in the contact groove.

[0011] Further, the inner wall of the contact groove extends along the axial direction of the valve plate, the bottom of the contact groove is arc-shaped, and the end of the abutting portion is smoothly arranged, so that the abutting portion is located in the contact groove.

[0012] Advantages of the present utility model:

[0013] For the check valve of the present utility model for preventing the sealing ring from falling off, by providing an annular dovetail groove and designing the sealing ring into a trapezoidal structure adapted thereto, the sealing ring can be firmly clamped in the groove and is not easy to fall off. This structure significantly improves the stability of the sealing ring during use, ensures the durability and reliability of the sealing effect. Since the sealing ring fits tightly in the annular dovetail groove and a part of it protrudes to form an abutting portion, it can tightly abut against the valve plate, thus forming a good sealing effect when the valve is closed. This design not only reduces the risk of medium leakage but also improves the working efficiency of the entire check valve. Brief Description of the Drawings

[0014] Figure 1 is a schematic diagram of the installation of the existing sealing ring;

[0015] Figure 2 is a schematic diagram of the installation of the sealing ring in the check valve for preventing the sealing ring from falling off in the present utility model;

[0016] Figure 3 is a schematic diagram of the structure of the sealing ring in the check valve for preventing the sealing ring from falling off in the present utility model;

[0017] Figure 4 is Figure 3 a schematic diagram of the structure from another angle.

[0018] Names corresponding to the marks in the figure:

[0019] 1. Valve body, 11. Annular installation groove, 2. Valve plate, 3. Step surface, 4. Annular dovetail groove, 5. Sealing ring, 6. Abutting portion, 8. Second groove, 9. Insertion hole, 10. Insertion post. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] As Figure 2 - Figure 4 shown, the check valve for preventing the sealing ring from falling off in this embodiment includes a valve body 1 and a valve plate 2. The valve body 1 is integrally circular ring-shaped, and a fluid passage is provided in the middle. The valve plate 2 is arranged in the valve body 1 through a rotating shaft and can rotate around the rotating shaft to open or close the fluid passage.

[0022] At the edge of the fluid passage, a stepped surface 3 is designed, and an annular dovetail groove 4 is arranged on the stepped surface 3. The annular dovetail groove 4 is characterized in that its groove opening is smaller than the groove bottom, and such a design can ensure that the sealing ring 5 is not easy to fall off after being snapped in.

[0023] One end of the sealing ring 5 is closely attached to the bottom of the annular dovetail groove 4, and its cross-sectional shape matches that of the annular dovetail groove 4, which is trapezoidal. And the other end of the sealing ring 5 is designed to protrude from the stepped surface 3 to form an abutting portion 6. When the valve plate 2 is closed, the abutting portion 6 will closely abut against the valve plate 2, thereby ensuring a good sealing effect.

[0024] In order to further enhance the stability of the sealing ring 5 in the annular dovetail groove 4, in one embodiment, a plurality of first grooves are circumferentially arranged at the bottom of the annular dovetail groove 4. At the same time, as Figure 4 shown, a plurality of second grooves 8 are also circumferentially arranged on the side surface of the sealing ring 5 that abuts against the bottom of the annular dovetail groove 4. These grooves can be used to hold the adhesive. When installing the sealing ring, the adhesive is placed into the annular dovetail groove 4. Through the first grooves and the second grooves 8, the contact area of the adhesive is increased, thereby bonding the sealing ring 5 more firmly in the annular dovetail groove 4.

[0025] In another embodiment, Figure 2 - Figure 4 shown, a plurality of insertion holes 9 are arranged at the bottom of the annular dovetail groove 4, and insertion posts 10 are arranged at the corresponding positions of the sealing ring 5. When the sealing ring 5 is installed in the annular dovetail groove 4, the insertion posts 10 will be inserted into the corresponding insertion holes 9, thereby further fixing the sealing ring 5.

[0026] Regarding the design of the valve plate 2, the present utility model has also been optimized. An abutting groove is circumferentially arranged at the edge of the valve plate 2, and the abutting groove matches the abutting portion 6 of the sealing ring 5. In order to ensure that the abutting portion 6 can be completely located in the abutting groove, the inner wall of the abutting groove is extended along the axial direction of the valve plate 2, and the width of the abutting groove is slightly larger than the width of the abutting portion 6.

[0027] In another embodiment, the bottom of the abutment groove is designed to be arc-shaped, and at the same time, the end of the abutment portion 6 is also rounded. This can not only ensure that the abutment portion 6 is completely located in the abutment groove, but also provide a better sealing effect when the valve plate 2 is closed.

[0028] Through the above design, the check valve of the present utility model can not only effectively prevent the backflow of the medium, but also ensure that the sealing ring 5 will not fall off during use, thus greatly improving the use effect and safety of the check valve.

[0029] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model fall within the protection scope of the present utility model.

Claims

1. A check valve for preventing the sealing ring from falling off, characterized in that: It includes a valve body (1) and a valve plate (2). The valve body (1) is arranged in a circular ring shape. The valve plate (2) is rotatably arranged in the valve body (1) through a rotating shaft and is used to open and close a fluid passage in the middle of the valve body (1). A stepped surface (3) is arranged at the edge of the fluid passage. An annular dovetail groove (4) is arranged on the stepped surface (3). A sealing ring (5) is clamped in the annular dovetail groove (4). Among them, one end of the sealing ring (5) is closely arranged against the bottom of the annular dovetail groove (4), and the cross-section of the sealing ring (5) is trapezoidal and adapted to the annular dovetail groove (4). The other end of the sealing ring (5) protrudes from the stepped surface (3) to form an abutting portion (6), and the abutting portion (6) is used to abut against the valve plate (2).

2. The check valve for preventing the sealing ring from falling off according to claim 1, characterized in that: A plurality of first grooves are circumferentially arranged at the bottom of the annular dovetail groove (4). A plurality of second grooves (8) are circumferentially arranged on one side surface of the sealing ring (5) that abuts against the bottom of the annular dovetail groove (4). The first grooves and the second grooves (8) are both used to accommodate an adhesive for bonding the sealing ring (5).

3. The check valve for preventing the sealing ring from falling off according to claim 1, wherein: A plurality of insertion holes (9) are circumferentially arranged at the bottom of the annular dovetail groove (4). A plurality of insertion posts (10) extend outward on one side surface of the sealing ring (5) that abuts against the bottom of the annular dovetail groove (4). The insertion posts (10) are used to be inserted into the insertion holes (9) after the sealing ring (5) is installed in the annular dovetail groove (4).

4. The check valve for preventing the sealing ring from falling off according to claim 1, wherein: An abutting groove for cooperatively abutting against the abutting portion (6) is circumferentially arranged at the edge of the valve plate (2).

5. The check valve for preventing the sealing ring from falling off according to claim 4, wherein: The inner wall of the abutting groove extends along the axial direction of the valve plate (2), and the width of the abutting groove is greater than the width of the abutting portion (6) so that the abutting portion (6) is located in the abutting groove.

6. The check valve for preventing the sealing ring from falling off according to claim 4, characterized in that: The inner wall of the abutting groove extends along the axial direction of the valve plate (2), the bottom of the abutting groove is arc-shaped, and the end of the abutting portion (6) is smoothly arranged so that the abutting portion (6) is located in the abutting groove.

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