Compression ring and three-eccentric center butterfly valve

Abstract

The utility model provides a compression ring and a three-eccentric center butterfly valve, the compression ring comprises a compression ring main body, the compression ring main body is provided with a plurality of structural holes along the thickness direction of the compression ring main body, and fasteners are suitable for penetrating through the structural holes; wherein the structural hole comprises a base hole, a middle hole and a bottom hole which are communicated with one another, the distance between at least one edge A of the middle hole and the center line of the base hole is H1, the distance between at least one edge of the base hole and the center line of the base hole is H2, and H1 is larger than H2; and at least the transition part of the bottom hole and the edge A of the middle hole is in a step shape protruding towards the center direction of the base hole. After the fastener enters the middle hole through the base hole, the upper end of the fastener is placed in the containing cavity at the edge A, at the moment, the upper end of the fastener is connected with the upper wall with the containing cavity, so that the upper wall cannot smoothly fall off from the base hole, and meanwhile the lower end of the fastener can penetrate through the bottom hole to be fixed to the outside.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a pressing ring and a triple-eccentric butterfly valve. Background Art

[0002] After the valve is installed in the pipeline, due to the flow of the medium and the existence of other vibrating devices on the pipeline, the valve will also vibrate at this time. The vibration of the valve will cause the valve parts to fall into the pipeline during use, and thus damage other devices on the pipeline along with the flow of the medium. Therefore, preventing parts from falling off is an important aspect of valve products.

[0003] Currently, the common method for preventing the pressing ring screws from falling off in a triple-eccentric butterfly valve is to spot-weld the screws on the pressing ring after proper installation.

[0004] The above-mentioned spot-welding method can effectively prevent the valve parts from falling off during use. However, when there is a problem with the valve, only a destructive method of grinding off the weld spots can be used to disassemble the valve, but this process will damage the valve. Content of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is that in the prior art, the spot-welding method can effectively prevent the valve parts from falling off during use. However, when there is a problem with the valve, only a destructive method of grinding off the weld spots can be used to disassemble the valve, but this process will damage the valve.

[0006] For this reason, the utility model provides a pressing ring, including:

[0007] A pressing ring body, wherein a plurality of structural holes are arranged along the thickness direction of the pressing ring body, and fasteners are adapted to be inserted into the structural holes;

[0008] Wherein, the structural holes include a base hole, an intermediate hole and a bottom hole which are communicated with each other. At least one edge A of the intermediate hole is at a distance H1 from the center line of the base hole, and at least one edge of the base hole is at a distance H2 from the center line of the base hole, and H1 is greater than H2;

[0009] At least the transition between the bottom hole and the edge A of the intermediate hole is a stepped shape protruding towards the center of the base hole.

[0010] Optionally, the pressing ring body forms a placement cavity at least at the edge A of the intermediate hole, one end of the fastener is clamped in the placement cavity, and the other end of the fastener extends out of the bottom hole.

[0011] Optionally, the base hole is a round hole, the intermediate hole is an oval hole, and the length of the intermediate hole is greater than the diameter of the intermediate hole.

[0012] Optionally, the base hole and the intermediate hole have the same width.

[0013] Optionally, the bottom hole is an oblong hole, and the size of the bottom hole is smaller than that of the intermediate hole.

[0014] Optionally, the bottom hole and the intermediate hole have the same center.

[0015] Optionally, a plurality of the structural holes are equally spaced.

[0016] A triple eccentric butterfly valve, comprising:

[0017] A valve body;

[0018] A valve stem, one end of which is inserted into the valve body;

[0019] A disc plate, which is connected to one end of the valve stem inside the valve body;

[0020] The above-mentioned pressing ring, the pressing ring is fixed to the disc plate.

[0021] Optionally, the triple eccentric butterfly valve further comprises a wound gasket and a seal ring assembly, the wound gasket and the seal ring assembly are arranged between the disc plate and the pressing ring and are fixed by the pressing ring.

[0022] Optionally, the pressing ring and the disc plate are fixed by a plurality of fasteners, the fasteners are inserted into the structural holes on the pressing ring, and the end of any one of the fasteners in the structural hole is located at the edge A of the intermediate hole.

[0023] The pressing ring and the triple eccentric butterfly valve provided by the present invention have the following advantages:

[0024] 1. The present invention provides a pressing ring, comprising a pressing ring body, a plurality of structural holes are arranged on the pressing ring body along its thickness direction, and fasteners are suitable for being inserted into the structural holes; wherein, the structural holes include a base hole, an intermediate hole and a bottom hole which are communicated with each other, at least one edge A of the intermediate hole is at a distance H1 from the center line of the base hole, at least one edge of the base hole is at a distance H2 from the center line of the base hole, and H1 is greater than H2;

[0025] The transition between at least the bottom hole and the edge A of the intermediate hole is a stepped shape protruding towards the center of the base hole.

[0026] The retaining ring of this structure has a middle hole provided between and communicating with the base hole and the bottom hole. By setting the middle hole, there is an edge A whose distance from the center line of the base hole is greater than the distance of an edge of the base hole from the center line of the base hole, and the transition between the bottom hole and the edge A of the middle hole is a stepped shape protruding towards the center of the base hole. Thus, a placement cavity recessed towards the inside of the retaining ring body can be formed at the edge A of the middle hole. The fastener is a screw. After the fastener enters the middle hole through the base hole, the upper end of the fastener is placed in the placement cavity at the edge A. At this time, the upper end of the fastener is against the upper wall of the existing placement cavity, so that it cannot fall off smoothly from the base hole. At the same time, the lower end of the fastener can pass through the bottom hole and be fixed to the outside. In actual use, after the fasteners are tightened evenly, first, the screw threads of the fasteners themselves are self-locking and anti-loosening. Secondly, if individual fasteners become loose during use, since the head of the fastener is blocked by the upper wall of the placement cavity, and the bottom of the fastener is connected to the outside, the fastener will always be at the edge A of the middle hole, thus preventing the fastener from continuing to fall off through the base hole.

[0027] 2. The present utility model provides a triple-eccentric butterfly valve, including a valve body, a valve stem, a disc plate, and the above-mentioned retaining ring. One end of the valve stem is inserted into the valve body; the disc plate is connected to the end of the valve stem inside the valve body; the retaining ring is fixed to the disc plate, and the retaining ring and the disc plate are fixed by a plurality of fasteners. The fasteners are inserted into the structural holes on the retaining ring, and the end of any fastener inside the structural hole is located at the edge A of the middle hole.

[0028] For the triple-eccentric butterfly valve of this structure, by adopting the above-mentioned retaining ring and using screws as fasteners, after the fasteners enter the middle hole through the base hole, the upper ends of the fasteners are placed in the placement cavities at the edge A. At this time, the upper ends of the fasteners are against the upper walls of the existing placement cavities, so that they cannot fall off smoothly from the base holes. At the same time, the lower ends of the fasteners can pass through the bottom holes and be fixed to the outside. If all the fasteners become loose at the same time, when the fasteners have not fallen yet, the valve will have a large sealing leak, and at this time, the site has already noticed and taken measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 The front view of the retaining ring provided in the embodiment of the present utility model;

[0031] Figure 2 ForFigure 1 Enlarged view of the structure at position B in the middle circle;

[0032] Figure 3 Side view of the pressure ring provided in the embodiment of the present utility model;

[0033] Figure 4 is Figure 3 Enlarged view of the structure at position C in the middle circle;

[0034] Figure 5 Schematic diagram of the installation of the pressure ring provided in the embodiment of the present utility model;

[0035] Figure 6 Schematic diagram of the structure of the three-eccentric butterfly valve provided in the embodiment of the present utility model.

[0036] Description of reference numerals:

[0037] 1 - Pressure ring body;

[0038] 2 - Base hole;

[0039] 3 - Intermediate hole;

[0040] 4 - Bottom hole;

[0041] 5 - Valve body;

[0042] 6 - Valve stem;

[0043] 7 - Disc;

[0044] 8 - Spiral wound gasket;

[0045] 9 - Sealing ring assembly;

[0046] 10 - Fastener;

[0047] 11 - Gasket. Detailed implementation manners

[0048] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0050] Embodiment 1

[0051] This embodiment provides a pressure ring, as Figures 1 to 4 shown, which includes a pressure ring body 1. A plurality of structural holes are provided in the pressure ring body 1 along its thickness direction, and fasteners 10 are adapted to be inserted through the structural holes.

[0052] In this embodiment, the structural holes include a base hole 2, an intermediate hole 3, and a bottom hole 4 that are interconnected. At least one edge A of the intermediate hole 3 is at a distance H1 from the center line of the base hole 2, and at least one edge of the base hole 2 is at a distance H2 from the center line of the base hole 2, where H1 is greater than H2; at least the transition at the edge A of the bottom hole 4 and the intermediate hole 3 is a stepped shape protruding towards the center of the base hole 2.

[0053] In the above embodiment, the intermediate hole 3 is provided between the base hole 2 and the bottom hole 4 and the three are interconnected. By setting that at least one edge A of the intermediate hole 3 is at a distance greater than that of at least one edge of the base hole 2 from the center line of the base hole 2, and edge A and the above-mentioned edge of the base hole 2 are on the same side, and the transition at the edge A of the bottom hole 4 and the intermediate hole 3 is a stepped shape protruding towards the center of the base hole 2, a placement cavity that is recessed towards the inside of the pressure ring body 1 can be formed at the edge A of the intermediate hole 3. The fastener 10 is a screw. After the fastener 10 enters the intermediate hole 3 through the base hole 2, as Figure 5 shown in the installation process, the upper end of the fastener 10 is placed in the placement cavity at the edge A. At this time, the upper end of the fastener 10 is in contact with the upper wall of the placement cavity, so that it cannot fall off from the base hole 2 smoothly. At the same time, the lower end of the fastener 10 can pass through the bottom hole 4 and be fixed to the outside.

[0054] In actual use, after the fasteners 10 are evenly tightened, first, the threads of the fasteners 10 themselves are self-locking and anti-loosening. Secondly, if any of the fasteners 10 become loose during use, since the head of the fastener 10 is blocked by the upper wall of the placement cavity, and the bottom of the fastener 10 is connected to the outside, the fastener 10 will always be at the edge A of the middle hole 3, thus preventing the fastener 10 from continuing to fall off through the base hole 2. When disassembly is required, only need to loosen all the fasteners 10 and then remove the pressing ring and the fasteners 10 together from the disc plate.

[0055] In this embodiment, the base hole 2 is a round hole, the middle hole 3 is an oval hole, the length of the middle hole 3 is greater than the diameter of the middle hole 3, and the widths of the base hole 2 and the middle hole 3 are the same. The bottom hole 4 is also an oval hole, the size of the bottom hole 4 is smaller than the size of the middle hole 3, and the bottom hole 4 and the middle hole 3 have the same center.

[0056] In this embodiment, several structural holes are evenly distributed.

[0057] Embodiment 2

[0058] This embodiment provides a triple-eccentric butterfly valve, as Figure 6 shown, including a valve body 5, a valve stem 6, a disc plate 7, and the pressing ring in Embodiment 1. One end of the valve stem 6 is inserted into the valve body 5, the disc plate 7 is connected to the end of the valve stem 6 inside the valve body 5, and the pressing ring is fixed to the disc plate 7.

[0059] In this embodiment, it further includes a wound gasket 8 and a seal ring assembly 9. The wound gasket 8 and the seal ring assembly 9 are arranged between the disc plate 7 and the pressing ring and fixed by the pressing ring. Specifically, the disc plate 7 is provided with a groove for placing the wound gasket 8 and the seal ring assembly 9. During installation, the wound gasket 8 and the seal ring assembly 9 are placed in this groove in sequence, and then the pressing ring is fixed to the disc plate 7 through the fasteners 10 to realize the pressing and fixing of the wound gasket 8 and the seal ring assembly 9.

[0060] In this embodiment, the pressing ring and the disc plate 7 are fixed by several fasteners 10. The fasteners 10 are inserted into the structural holes on the pressing ring, and the end of any fastener 10 in the structural hole is located at the edge A of the middle hole 3.

[0061] By adopting the pressing ring in Embodiment 1, as Figure 5 shown in the installation process, the fasteners 10 are screws. After the fasteners 10 enter the middle hole 3 through the base hole 2, the upper ends of the fasteners 10 are placed in the placement cavity at the edge A. At this time, the upper ends of the fasteners 10 are blocked by the upper wall of the placement cavity, so that they cannot fall off from the base hole 2 smoothly. At the same time, the lower ends of the fasteners 10 can pass through the bottom hole 4 and be fixed to the outside. If all the fasteners 10 become loose at the same time, when the fasteners 10 have not fallen yet, there will be a large leakage in the valve seal, and at this time, the site has already noticed and taken measures.

[0062] In this embodiment, after the fastener 10 is assembled into the structural hole, it can move in the placement cavity formed at the edge A of the middle hole 3, and the height of the placement cavity is slightly higher than the thickness of the fastener 10 plus the gasket 11 by a distance of about 1 to 2 threads.

[0063] The three-eccentric butterfly valve provided in this embodiment can avoid spot welding the screws on the pressure ring and the pressure ring. Instead, the pressure ring structure in Embodiment 1 is adopted. When the valve needs to be disassembled when there is a problem, the fasteners 10 are loosened one by one and then the pressure ring is disassembled. This process will not cause damage to the valve.

[0064] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A compression ring, characterized in that, Comprising: A pressing ring body (1), on which a plurality of structural holes are provided along its thickness direction, and fasteners (10) are adapted to be inserted into the structural holes; Wherein, the structural holes include a base hole (2), an intermediate hole (3) and a bottom hole (4) that communicate with each other. At least one edge A of the intermediate hole (3) is at a distance H1 from the center line of the base hole (2), and at least one edge of the base hole (2) is at a distance H2 from the center line of the base hole (2), and H1 is greater than H2; the edge A and the above-mentioned edge of the base hole (2) are on the same side; At least the transition between the bottom hole (4) and the edge A of the intermediate hole (3) is a stepped shape protruding towards the center of the base hole (2).

2. The retaining ring according to claim 1, wherein, The pressing ring body (1) forms a placement cavity at least at the edge A of the intermediate hole (3), one end of the fastener (10) is clamped in the placement cavity, and the other end of the fastener (10) extends out of the bottom hole (4).

3. The retaining ring according to claim 2, characterized in that, The base hole (2) is a circular hole, the intermediate hole (3) is an oval hole, and the length of the intermediate hole (3) is greater than the diameter of the intermediate hole (3).

4. The retaining ring according to claim 3, characterized in that, The base hole (2) and the intermediate hole (3) have the same width.

5. The retaining ring according to claim 2, characterized in that The bottom hole (4) is an oval hole, and the size of the bottom hole (4) is smaller than the size of the intermediate hole (3).

6. The retaining ring according to claim 5, wherein, The bottom hole (4) and the intermediate hole (3) have the same center.

7. The press ring according to any one of claims 1-6, characterized in that, A plurality of the structural holes are equally spaced.

8. A triple-eccentric butterfly valve, characterized in that, Comprising: A valve body (5); A valve stem (6), one end of which is inserted into the valve body (5); A disc plate (7), connected to one end of the valve stem (6) inside the valve body (5); The pressing ring according to any one of claims 1-7, the pressing ring being fixed to the disc plate (7).

9. The triple-eccentric butterfly valve according to claim 8, wherein, Further comprising a wound gasket (8) and a seal ring assembly (9), the wound gasket (8) and the seal ring assembly (9) being arranged between the disc plate (7) and the pressing ring and fixed by the pressing ring.

10. The triple-eccentric butterfly valve according to claim 8, characterized in that, The pressing ring and the disc plate (7) are fixed by a plurality of fasteners (10), the fasteners (10) are inserted into the structural holes on the pressing ring, and the end of any one of the fasteners (10) in the structural hole is located at the edge A of the intermediate hole (3).

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