A butterfly valve seal ring mounting structure

Abstract

The utility model provides a sealing ring mounting structure of butterfly valve belongs to valve technical field. It solved how to improve the problem of the installation firmness and the sealing property of sealing ring. In the sealing ring mounting structure of this butterfly valve, the butterfly valve includes sealing ring and the valve seat of column shape, the valve seat is provided with the feeding port and the installation port of intercommunication, the sealing ring mounting structure includes the step groove who forms between the installation port and the feeding port and arranges along the circumference, the one side groove wall of step groove mouth has the upper limit bit convex part, the other side groove wall has the lower limit bit convex part, both along the circumference of valve seat arrangement, the sealing ring mounting structure still includes the upper limit groove who sets up on the upper side of sealing ring and the lower limit groove who sets up on the lower side of sealing ring, both along the circumference of sealing ring set up, sealing ring is embedded in step groove and makes the upper limit bit convex part embeds the upper limit groove, the lower limit bit convex part embeds the lower limit groove. The sealing ring mounting structure of this butterfly valve can improve the installation firmness and the sealing property of sealing ring.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a sealing ring installation structure for a butterfly valve. Background Technology

[0002] Butterfly valves are a common valve structure in existing technology. They generally include a valve seat and a butterfly plate connected inside the valve seat that can rotate. Simply put, when in use, the butterfly plate can be driven to rotate a certain extent by an external handle, so that the valve can be opened to allow the conveyed medium to flow, and vice versa, the conveyed medium can be blocked.

[0003] However, in practice, there will be a certain gap between the inner wall of the channel in the valve seat and the outer edge of the butterfly plate. Therefore, even though the butterfly plate rotates to seal the channel in the valve seat, some medium may still seep out through the gap. Therefore, in order to avoid leakage, a sealing ring is usually installed in the channel of the valve seat. The sealing ring and the outer edge of the butterfly plate are used to seal the gap, thereby ensuring that the butterfly valve prevents the medium from leaking when it is closed.

[0004] Currently, the installation of sealing rings generally involves creating an annular groove on the inner wall of the valve seat channel, with the groove running circumferentially along the inner wall of the channel. The sealing ring is then fitted into the annular groove using an interference fit. However, based on actual usage, it is known that the outer edge of the butterfly plate and the inner wall support of the sealing ring also require an interference fit to achieve a full seal. During the rotation and opening / closing of the butterfly plate, the plate continuously exerts a certain amount of pressure on the inner wall of the sealing ring. Over time, the sealing ring may gradually come out of the annular groove due to this pressure, resulting in poor installation stability and inadequate sealing performance. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a sealing ring installation structure for a butterfly valve. The technical problem to be solved by this utility model is: how to improve the installation firmness and sealing performance of the sealing ring.

[0006] The objective of this utility model can be achieved through the following technical solution: a sealing ring mounting structure for a butterfly valve, the butterfly valve including a sealing ring and a columnar valve seat, one end of the valve seat having a feed port for conveying a medium, and the other end having a mounting port for mounting a butterfly plate, the mounting port and the feed port being connected, the sealing ring mounting structure including a stepped groove formed between the mounting port and the feed port and arranged circumferentially along the valve seat, one side wall of the stepped groove having an upper limit protrusion, the other side wall of the stepped groove having a lower limit protrusion, the upper limit protrusion and the lower limit protrusion being arranged circumferentially along the valve seat, the sealing ring mounting structure also including an upper limit groove on the upper side of the sealing ring and a lower limit groove on the lower side of the sealing ring, the upper limit groove and the lower limit groove being opened circumferentially along the sealing ring, the sealing ring being embedded in the stepped groove and the upper limit protrusion being embedded in the upper limit groove and the lower limit protrusion being embedded in the lower limit groove.

[0007] In the sealing ring installation structure of this butterfly valve, the valve seat serves as the main installation body. Specifically, it is columnar and assembled between two pipe sections. Material media are transferred through the cooperation of the feed port and the installation port. During use, the user manually operates the handle, causing the butterfly plate in the installation port to rotate, opening or closing the installation port, thus controlling the on / off state of the pipeline system. Based on existing technology, to ensure the anti-seepage effect of the pipeline system in the disconnected state, a sealing ring with an interference fit to the butterfly plate is generally installed inside the valve seat to seal the gap. In this application, a stepped groove formed between the installation port and the feed port is used as the installation location. During assembly, the sealing ring is simply inserted into the stepped groove, making the sealing ring adjacent to the installation port. That is, the sealing ring is adjacent to the butterfly plate installed in the installation port, thereby sealing the gap between the butterfly plate and the installation port. Based on this, this application... An upper limit protrusion is provided on one side of the groove wall of the stepped groove, and a lower limit protrusion is provided on the other side of the groove wall. Correspondingly, an upper limit groove is provided on the upper side of the sealing ring, and a lower limit groove is provided on the lower side of the sealing ring. During installation, when the sealing ring is inserted into the stepped groove, the upper limit protrusion engages with the upper limit groove, and the lower limit protrusion engages with the lower limit groove. This multi-point positioning method ensures that the sealing ring and the valve seat are firmly positioned within the stepped groove, effectively preventing the sealing ring from detaching and causing sealing failure. It is worth noting that in this application, both the upper and lower limit protrusions are arranged circumferentially along the valve seat, and both the upper and lower limit grooves are opened circumferentially along the sealing ring. This ensures that the upper and lower sides of the sealing ring are more firmly positioned in the circumferential direction during assembly, further improving the anti-detachment effect of the sealing ring.

[0008] In the above-described sealing ring installation structure of the butterfly valve, both the upper limit groove and the lower limit groove are constricted grooves. The outer peripheral wall of the upper limit protrusion fits into the inner peripheral wall of the upper limit groove, and the lower limit protrusion fits into the inner peripheral wall of the lower limit groove. This arrangement ensures the connection stability between the upper limit protrusion and the upper limit groove, and between the lower limit protrusion and the lower limit groove. Furthermore, the full contact between the upper limit protrusion and the upper limit groove, and between the lower limit protrusion and the lower limit groove, ensures the installation stability of the sealing ring in the stepped groove.

[0009] In the above-described butterfly valve sealing ring installation structure, the depth of the upper limit groove is less than that of the lower limit groove, and the angle between one side wall of the upper limit groove and the bottom wall of the upper limit groove is 90 degrees. Specifically, when installing the sealing ring, not only does the sealing ring need to be embedded in the stepped groove, but the upper limit protrusion also needs to be embedded in the upper limit groove, and the lower limit protrusion needs to be embedded in the lower limit groove. Therefore, the actual assembly process is to first insert the sealing ring into the stepped groove, use the groove wall of the stepped groove to initially position it, then squeeze the sealing ring so that the upper limit protrusion is embedded in the upper limit groove, and finally adjust the posture of the sealing ring so that the lower limit protrusion is embedded in the lower limit groove. This application, through further adjustment of the upper limit groove, enables the upper limit groove to both restrict the upper limit protrusion and ensure that the sealing ring has sufficient deformation capacity to allow the upper limit protrusion to be inserted into the lower limit groove.

[0010] In the sealing ring installation structure of the butterfly valve described above, the inner edge of the bottom of the upper limit convex part has a clearance surface, and the clearance surface is arranged circumferentially along the upper limit convex part. By setting the clearance surface, more gap is reserved between the upper limit convex part and the bottom wall of the upper limit groove, avoiding interference between the upper limit convex part and the upper limit groove during the process of the lower limit convex part being embedded in the lower limit groove.

[0011] In the above-described sealing ring installation structure of the butterfly valve, the upper limit groove and the lower limit groove are radially offset along the sealing ring. This arrangement avoids the reduction in local strength of the sealing ring caused by the opening of the upper and lower limit grooves, and prevents excessive stress concentration during assembly, which could cause the upper limit protrusion to dislodge during the insertion of the lower limit protrusion, effectively ensuring ease of assembly.

[0012] In the above-described butterfly valve sealing ring installation structure, the outer surface of the sealing ring is conical. This facilitates the sealing ring's insertion into the stepped groove, while ensuring sufficient space within the stepped groove for subsequent adjustment of the sealing ring.

[0013] Compared with existing technologies, the sealing ring installation structure of this butterfly valve has the following advantages: the sealing ring is assembled by a stepped groove formed in the valve seat, and while being embedded, the upper limit protrusion and the upper limit groove are engaged, and the lower limit protrusion and the lower limit groove are engaged, to ensure the firmness of the sealing ring in the valve seat, thereby ensuring the sealing performance with the butterfly plate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the sealing ring installation structure of this butterfly valve.

[0015] Figure 2 This is a sectional view and a partial enlarged view of the sealing ring installation structure of this butterfly valve.

[0016] Figure 3 This is a sectional view of the valve seat and a partial enlarged view.

[0017] Figure 4 It is a cross-sectional view of the sealing ring and a partial enlarged view.

[0018] In the figure, 1 is the valve seat; 11 is the feed port; 12 is the mounting port; 13 is the stepped groove; 131 is the upper limit protrusion; 1311 is the clearance surface; 132 is the lower limit protrusion; 2 is the sealing ring; 21 is the upper limit groove; 22 is the lower limit groove. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 and Figure 3 As shown, in the sealing ring installation structure of this butterfly valve, the butterfly valve includes a sealing ring 2 and a columnar valve seat 1. One end of the valve seat 1 is provided with a feed port 11 for conveying material medium, and the other end of the valve seat 1 is provided with a mounting port 12 for installing the butterfly plate. The sealing ring installation structure includes a stepped groove 13 located in the valve seat 1 between the mounting port 12 and the feed port 11, and the stepped groove 13 is arranged along the circumference of the valve seat 1.

[0021] Combination Figure 4The stepped groove 13 has an upper limit protrusion 131 on one side of its groove wall and a lower limit protrusion 132 on the other side of its groove wall. The upper limit protrusion 131 has a right trapezoidal cross-section when cut along the axial direction of the valve seat 1, and the lower limit protrusion 132 has an isosceles trapezoidal cross-section when cut along the axial direction of the valve seat 1. The sealing ring 2 is annular and its outer circumferential wall is conical. An upper limit groove 21 is provided on the upper side of the sealing ring 2, and a lower limit groove 22 is provided on the lower side of the sealing ring 2. Both the upper limit groove 21 and the lower limit groove 22 are provided along the circumference of the sealing ring 2. The upper limit groove 21 has a lower limit groove 22. The included angle between one side of the groove wall and the inner bottom wall of the upper limit groove 21 is 90 degrees. Secondly, the depth of the upper limit groove 21 is less than the depth of the lower limit groove 22. Furthermore, the upper limit groove 21 and the lower limit groove 22 are radially offset relative to the sealing ring 2. Both the upper limit groove 21 and the lower limit groove 22 are constricted grooves, so that the size and shape of the upper limit groove 21 are the same as the upper limit protrusion 131, and the size and shape of the lower limit groove 22 are the same as the lower limit protrusion 132. In addition, a relief surface 1311 is machined at the bottom inner edge of the upper limit protrusion 131 and is inclined relative to the axis of the valve seat 1.

[0022] Combination Figure 2 During assembly, the sealing ring 2 is placed inside the valve seat 1 and embedded into the stepped groove 13 by hard compression. By lifting and pressing the sealing ring 2, it is twisted and deformed in the stepped groove 13, so that the upper limit protrusion 131 is embedded into the upper limit groove 21. Then, the sealing ring 2 is lifted and pressed slightly again, so that it is twisted and deformed in the stepped groove 13, so that the lower limit protrusion 132 is embedded into the lower limit groove 22. The sealing ring 2 and the valve seat 1 are interlocked by multi-point positioning, ensuring that the sealing ring 2 can be firmly positioned in the stepped groove 13.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document frequently uses terms such as valve seat 1, feed port 11, mounting port 12, stepped groove 13, upper limit protrusion 131, clearance surface 1311, lower limit protrusion 132, sealing ring 2, upper limit groove 21, and lower limit groove 22, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A sealing ring mounting structure for a butterfly valve, the butterfly valve comprising a sealing ring (2) and a columnar valve seat (1), wherein one end of the valve seat (1) has a feed port (11) for conveying a medium, and the other end has a mounting port (12) for mounting a valve plate, the mounting port (12) and the feed port (11) being connected, characterized in that, The sealing ring mounting structure includes a stepped groove (13) formed between the mounting port (12) and the feed port (11) and arranged circumferentially along the valve seat (1). One side wall of the stepped groove (13) has an upper limit protrusion (131), and the other side wall has a lower limit protrusion (132). Both the upper limit protrusion (131) and the lower limit protrusion (132) are arranged circumferentially along the valve seat (1). The sealing ring mounting structure also... It includes an upper limit groove (21) on the upper side of the sealing ring (2) and a lower limit groove (22) on the lower side of the sealing ring (2). The upper limit groove (21) and the lower limit groove (22) are both opened along the circumference of the sealing ring (2). The sealing ring (2) is embedded in the stepped groove (13) and the upper limit protrusion (131) is embedded in the upper limit groove (21) and the lower limit protrusion (132) is embedded in the lower limit groove (22).

2. The sealing ring installation structure of the butterfly valve according to claim 1, characterized in that, The upper limit groove (21) and the lower limit groove (22) are both constricted grooves. The outer peripheral wall of the upper limit protrusion (131) and the inner peripheral wall of the upper limit groove (21) are in contact with each other, and the lower limit protrusion (132) and the inner peripheral wall of the lower limit groove (22) are in contact with each other.

3. The sealing ring installation structure of the butterfly valve according to claim 2, characterized in that, The depth of the upper limit groove (21) is less than that of the lower limit groove (22), and the angle between one side wall of the upper limit groove (21) and the bottom wall of the upper limit groove (21) is 90 degrees.

4. The sealing ring mounting structure of the butterfly valve according to any one of claims 1-3, characterized in that, The inner edge of the bottom of the upper limit protrusion (131) has a relief surface (1311), and the relief surface (1311) is arranged circumferentially along the upper limit protrusion (131).

5. The sealing ring mounting structure of the butterfly valve according to claim 4, characterized in that, The upper limit groove (21) and the lower limit groove (22) are radially offset along the sealing ring (2).

6. The sealing ring mounting structure of the butterfly valve according to claim 5, characterized in that, The outer surface of the sealing ring (2) is conical.

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