Double-shaft positioning structure of high-performance butterfly valve

Abstract

The utility model discloses a double-shaft positioning structure of a high-performance butterfly valve, which relates to the technical field of butterfly valves and specifically comprises a shell, a valve plate and an upper valve rod, a lower valve rod is arranged in the middle of the bottom of the shell, the top end of the lower valve rod is movably sleeved with the valve plate, the other end of the valve plate is fixedly connected with the upper valve rod, and the valve plate is movably sleeved with the upper valve rod. The upper valve rod is movably connected with the top end of the shell, a sealing seat is arranged between the valve plate and the shell and comprises a sealing ring matched with the valve plate, and the two ends of the outer side wall of the sealing ring are fixedly connected with outer supporting rings. According to the double-shaft positioning structure of the high-performance butterfly valve, the valve plate is jointly positioned through the upper valve rod and the lower valve rod, and the upper valve rod and the lower valve rod are in a mutually independent state and do not influence each other, so that the positioning precision of the valve plate can be improved. The valve plate is supported through the lower valve rod, the shell supports and limits the sealing seat, the probability that the valve plate sinks is reduced, and the service life of the high-performance butterfly valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a double-axis positioning structure of a high-performance butterfly valve. Background Technique

[0002] The butterfly valve, also called a flap valve, is a simple-structured regulating valve that can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. It mainly functions as a cut-off and throttling in pipelines.

[0003] The high-performance butterfly valve is a type of butterfly valve. In the related art, generally, the axial direction of the valve plate of the high-performance butterfly valve is not positioned, and only the entire axial downward weight of the butterfly plate is supported by the sealing seat. As Figure 5 shown, after long-term use of this type of high-performance butterfly valve, the phenomenon of valve plate sinking will occur, which will further increase the risks of leakage and increased torque, and greatly reduce the service life. Based on this, this application proposes a double-axis positioning structure of a high-performance butterfly valve. Content of the Utility Model

[0004] The utility model provides a double-axis positioning structure of a high-performance butterfly valve, which solves the problem that the high-performance butterfly valve in the above-mentioned background technique only supports the entire axial downward weight of the butterfly plate through the sealing seat. After long-term use, the phenomenon of valve plate sinking will occur, which will further increase the risks of leakage and increased torque, and reduce the service life.

[0005] The utility model provides the following technical solution: A double-axis positioning structure of a high-performance butterfly valve, including a housing, a valve plate, and an upper valve stem. A lower valve stem is arranged in the middle of the bottom of the housing. The top end of the lower valve stem is movably sleeved with the valve plate. The other end of the valve plate is fixedly connected with the upper valve stem. The upper valve stem is movably connected to the top end of the housing. A sealing seat is arranged between the valve plate and the housing.

[0006] The sealing seat includes a sealing ring adapted to the valve plate. Both ends of the outer side wall of the sealing ring are fixedly connected with outer support rings. An inner support ring is arranged between the two outer support rings. Internal threads are provided at the top and bottom of the inner support ring. The upper valve stem and the lower valve stem are threadedly connected to the inner support ring through the internal threads. A support groove is formed between the outer support ring and the inner support ring. A support block is arranged in the inner cavity of the support groove. The support block is fixedly connected with the inner wall of the housing.

[0007] Preferably, through holes are provided at both ends of the housing. A sealing gasket is fixedly connected to the inner side of the inner cavity of the through hole. The sealing gasket is in close fit with the sealing seat.

[0008] Preferably, a pin hole is provided at the bottom end of the lower valve stem. A pin is movably connected to the bottom end of the housing. The pin is adapted to the pin hole.

[0009] Preferably, the inner side wall of the support block and the outer side wall of the inner support ring are both stepped. A placement groove is formed between the outer side of the support block and the housing, and one end of the outer support ring away from the sealing ring is inserted into the placement groove.

[0010] Preferably, the outer surface of the valve plate is coated with a heat insulation coating, and the outer surface of the heat insulation coating is coated with an anti-sticking coating.

[0011] Preferably, a sealing strip is fixed to the inner wall of the sealing seat, and both ends of the inner wall of the sealing seat are rounded.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. For the double-axis positioning structure of the high-performance butterfly valve, the valve plate is positioned by the upper valve stem and the lower valve stem together, and the upper valve stem and the lower valve stem are in an independent state and do not affect each other, thereby improving the positioning accuracy of the valve plate. The valve plate is supported by the lower valve stem and the support seat together, and the housing supports and positions the sealing seat, reducing the probability of the valve plate sinking and extending the service life of the high-performance butterfly valve.

[0014] 2. For the double-axis positioning structure of the high-performance butterfly valve, by setting the internal thread and the external thread, the position of the valve plate in the housing can be changed, so that this structure can meet various requirements; by setting the heat insulation coating, the influence of temperature on the valve plate can be reduced, the probability of the valve plate deforming can be reduced, and the service life of the high-performance butterfly valve can be extended. And the setting of the anti-sticking coating enables the conveyed fluid to be quickly separated from the valve plate, reducing the water resistance and improving the flow capacity of the butterfly valve, which is convenient for the use of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0016] Figure 2 is the Figure 1 bottom view schematic diagram of the structure of the present utility model;

[0017] Figure 3 is the Figure 1 front view schematic diagram of the structure of the present utility model;

[0018] Figure 4 is the Figure 1 explosion schematic diagram of the structure of the present utility model;

[0019] Figure 5 is a schematic diagram of the connection between the valve plate and the valve stem of a butterfly valve in the prior art.

[0020] In the figure: 1. Housing; 2. Sealing seat; 3. Valve plate; 4. Upper valve stem; 5. Sealing gasket; 6. Lower valve stem; 7. Bolt; 8. Support block; 9. Outer support ring; 10. Sealing ring; 11. Support groove; 12. Internal thread; 13. Inner support ring. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention provides a dual-axis positioning structure for a high-performance butterfly valve, including a housing 1, a valve plate 3 and an upper valve stem 4. Two support blocks 8 are fixedly connected to the inner wall of the housing 1. The sealing seat 2 includes a sealing ring 10. Both ends of the outer side wall of the sealing ring 10 are fixedly connected with outer support rings 9, and the middle of the outer side wall of the sealing ring 10 is fixedly connected with an inner support ring 13. The inner support ring 13 is arranged between the two outer support rings 9. A support groove 11 is formed between the outer support ring 9 and the inner support ring 13. The support block 8 is located in the inner cavity of the support groove 11, and the support block 8 is in close fit with the inner wall of the support groove 11. The inner side wall of the support block 8 and the outer side wall of the inner support ring 13 are both stepped. A placement groove is formed between the outer side of the support block 8 and the housing 1. One end of the outer support ring 9 away from the sealing ring 10 is inserted into the placement groove. Through the arrangement of the support block 8 and the support groove 11, the support block 8 can support and limit the sealing seat 2, reducing the probability of the sealing seat 2 sinking.

[0023] Through holes are provided in the middle of the top and the middle of the bottom of the sealing seat 2. Internal threads 12 are provided on the inner walls of the through holes. Through holes are provided in the middle of the top and the middle of the bottom of the housing 1. A sealing gasket 5 is fixed at one end of the through hole close to the internal thread 12. The sealing gasket 5 is in close fit with the sealing seat 2. The material of the sealing gasket 5 can be rubber.

[0024] The upper valve stem 4 is movably connected in the inner cavity of the through hole at the top of the housing 1. External threads adapted to the internal threads 12 are provided on the outer side wall of the upper valve stem 4. The upper valve stem 4 is threadedly connected with the sealing seat 2. The bottom of the upper valve stem 4 is fixedly connected with a valve plate 3. The valve plate 3 is in a movable connection state with the sealing seat 2. The upper valve stem 4 can drive the valve plate 3 to rotate. And through the threaded connection between the upper valve stem 4 and the sealing seat 2, the sealing performance between the upper valve stem 4 and the sealing seat 2 can be improved.

[0025] Inside the inner cavity of the through hole at the bottom of the housing 1, a lower valve stem 6 is provided. An external thread adapted to the internal thread 12 is provided on the outer side wall of the lower valve stem 6. A pin hole is provided at the bottom end of the lower valve stem 6. The bottom end of the housing 1 is movably connected with a pin 7, and the pin 7 is adapted to the pin hole. Through the setting of the pin 7, the lower valve stem 6 can be positioned. The lower valve stem 6 is movably sleeved on the bottom end of the valve plate 3. Through the setting of the lower valve stem 6, the lower valve stem 6 can support and limit the valve plate 3, reducing the probability of the valve plate 3 sinking.

[0026] Both the upper valve stem 4 and the lower valve stem 6 are adapted to the gasket 5. Through the setting of the gasket 5, the sealing performance of this structure is increased.

[0027] It can be seen from the above description that the valve plate 3 is positioned jointly by the upper valve stem 4 and the lower valve stem 6, and the upper valve stem 4 and the lower valve stem 6 are in an independent state and do not affect each other, thus improving the positioning accuracy of the valve plate 3; and the valve plate 3 is supported by the lower valve stem 6, and the housing 1 supports and limits the sealing seat 2, reducing the probability of the valve plate 3 sinking, and further extending the service life of the high-performance butterfly valve. And through the setting of the internal thread and the external thread, the position of the valve plate 3 in the housing 1 can be changed, making this structure adaptable to various requirements.

[0028] An insulating coating is applied on the outer surface of the valve plate 3. Through the setting of the insulating coating, the influence of the external temperature on the valve plate 3 can be reduced, and further the probability of the valve plate 3 deforming can be reduced. An anti-sticking coating is applied on the outer surface of the insulating coating, enabling the conveyed fluid to be quickly separated from the valve plate 3, reducing the water resistance, improving the flow capacity of the butterfly valve, and facilitating the use of the butterfly valve.

[0029] A sealing strip is fixed on the inner wall of the sealing seat 2. The material of the sealing strip can be rubber, improving the sealing performance between the sealing seat 2 and the valve plate 3. The two ends of the inner wall of the sealing seat 2 are rounded to reduce the water resistance.

[0030] To sum up: When the double-axis positioning structure of the high-performance butterfly valve is in use, the valve plate 3 is positioned jointly by the upper valve stem 4 and the lower valve stem 6, improving the positioning accuracy of the valve plate 3, and the lower valve stem 6 can support the valve plate 3, reducing the probability of the valve plate 3 sinking and extending the service life of the high-performance butterfly valve. And through the setting of the insulating coating and the anti-sticking coating, the insulating coating can reduce the influence of the external temperature on the valve plate 3, and further reduce the probability of the valve plate 3 deforming, extending the service life of the high-performance butterfly valve. The setting of the anti-sticking coating enables the conveyed fluid to be quickly separated from the valve plate 3, reducing the water resistance, improving the flow capacity of the butterfly valve, and facilitating the use of the butterfly valve.

[0031] All the standard parts used in the present utility model can be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-axis positioning structure for a high-performance butterfly valve, comprising a housing (1), a valve plate (3), and an upper valve stem (4), characterized in that: A lower valve stem (6) is provided in the middle of the bottom of the housing (1). The top end of the lower valve stem (6) is movably sleeved with a valve plate (3). The other end of the valve plate (3) is fixedly connected to an upper valve stem (4). The upper valve stem (4) is movably connected to the top end of the housing (1). A sealing seat (2) is provided between the valve plate (3) and the housing (1). The sealing seat (2) includes a sealing ring (10) adapted to the valve plate (3). Outer support rings (9) are fixedly connected to both ends of the outer side wall of the sealing ring (10). An inner support ring (13) is provided between the two outer support rings (9). Internal threads (12) are provided at the top and bottom of the inner support ring (13). The upper valve stem (4) and the lower valve stem (6) are threadedly connected to the inner support ring (13) through the internal threads (12). A support groove (11) is formed between the outer support ring (9) and the inner support ring (13). A support block (8) is provided in the inner cavity of the support groove (11). The support block (8) is fixedly connected to the inner wall of the housing (1).

2. The dual-axis positioning structure of a high-performance butterfly valve according to claim 1, wherein: Through holes are provided at both ends of the housing (1). A sealing gasket (5) is fixedly connected to the inner side of the inner cavity of the through hole. The sealing gasket (5) is in close fit with the sealing seat (2).

3. The dual-axis positioning structure of a high-performance butterfly valve according to claim 1, characterized in that: A pin hole is provided at the bottom end of the lower valve stem (6). A pin (7) is movably connected to the bottom end of the housing (1). The pin (7) is adapted to the pin hole.

4. The dual-axis positioning structure of a high-performance butterfly valve according to claim 1, wherein: The inner side wall of the support block (8) and the outer side wall of the inner support ring (13) are both stepped. A placement groove is formed between the outer side of the support block (8) and the housing (1). One end of the outer support ring (9) away from the sealing ring (10) is inserted into the placement groove.

5. The dual-axis positioning structure of a high-performance butterfly valve according to claim 1, characterized in that: A heat insulation coating is applied to the outer surface of the valve plate (3). An anti-sticking coating is applied to the outer surface of the heat insulation coating.

6. The dual-axis positioning structure of a high-performance butterfly valve according to claim 1, characterized in that: A sealing strip is fixed to the inner wall of the sealing seat (2). The two ends of the inner wall of the sealing seat (2) are rounded off.

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