Double-sealing mechanism butterfly valve with optimized flow channel

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a double-sealing mechanism butterfly valve with an optimized flow channel, which comprises a valve body, an inner wear-resistant ring is fixedly arranged on the inner wall of the valve body, a valve core component is arranged in the valve body, and the valve core component comprises a valve core which is arranged in the valve body and is rotatably connected with the valve body. Central hard rings are arranged on the front side face and the rear side face of the valve element correspondingly, outer rubber sealing pads are fixedly installed on the annular side faces of the central hard rings, hollow cavities are formed in the outer rubber sealing pads, inner limiting extrusion pads are arranged in the hollow cavities, and the inner limiting extrusion pads are fixedly installed on the annular side faces of the central hard rings. An end fixing disc is arranged on the outer side face of the center hard ring, and the center hard ring is pressed and fixed to the valve element through the end fixing disc. The sealing device has a double-sealing mechanism, can perform bidirectional sealing operation, and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and more specifically, to a double-sealing mechanism butterfly valve with optimized flow channels. Background Art

[0002] In the field of fluid control, as a widely used type of valve, the performance of butterfly valves directly affects the overall operating efficiency and safety of fluid systems. With the continuous progress of industrial technology, higher requirements are put forward for the sealing performance, durability, and operation convenience of butterfly valves.

[0003] There are many types of butterfly valves on the market. However, when most butterfly valves are in use, only one sealing component is sleeved or fixedly installed on them, and they all have only a single sealing mechanism, which can only achieve a one-way sealing effect. During one-way sealing operation, once the sealing part is damaged, leakage will occur, which is not conducive to achieving the effect of double-sealing operation and not conducive to extending the service life. In view of this, we propose a double-sealing mechanism butterfly valve with optimized flow channels. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double-sealing mechanism butterfly valve with optimized flow channels to solve the defects mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-sealing mechanism butterfly valve with optimized flow channels includes a valve body. An inner wear-resistant ring is fixedly installed on the inner wall of the valve body. A valve core assembly is arranged inside the valve body. The valve core assembly includes a valve core arranged inside the valve body and rotatably connected to the valve body. Central hard rings are arranged on the front and rear sides of the valve core. Outer rubber sealing gaskets are fixedly installed on the circumferential side surfaces of the central hard rings. A hollow chamber is arranged inside the outer rubber sealing gaskets. An inner limiting extrusion pad is arranged inside the hollow chamber. The inner limiting extrusion pad is fixedly installed on the circumferential side surface of the central hard ring. An end fixing plate is arranged on the outer side surface of the central hard ring. The end fixing plate presses and fixes the central hard ring on the valve core.

[0007] Preferably, the inner wear-resistant ring and the valve body are of an integrally formed structure, and the inner surface of the inner wear-resistant ring is a smooth surface.

[0008] Preferably, the central hard ring and the end fixing plate are fixedly installed on the valve core through a plurality of fastening bolts, and the circumferential side edge part of the end fixing plate presses on the outer rubber sealing gasket.

[0009] Preferably, flange plates are fixedly installed at both ends of the valve body, and the flange plates are fixedly connected to the external pipelines through a plurality of fastening bolts.

[0010] Preferably, a valve handle seat is fixedly installed on the valve body, a valve handle is fixedly installed on the valve core, and the valve handle passes through the valve handle seat.

[0011] Preferably, cross positioning rods are fixedly installed on both the left and right side surfaces of the valve core, the central hard ring is sleeved on the cross positioning rods, and the sizes of the cross positioning rods are adapted to the size of the central hard ring.

[0012] Preferably, a rectangular slot is provided at the central position of the cross positioning rod, a positioning plug is fixedly installed at the central position of the side surface of the end fixing plate, and the positioning plug is in plug-in fit with the rectangular slot.

[0013] Preferably, the cross sections of the positioning plug and the rectangular slot are both rectangular, and the size of the positioning plug is adapted to the size of the rectangular slot.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By means of the valve core assembly provided in the present utility model, it is ensured that during use, two-way sealing operation can be carried out by using the front and rear outer rubber gaskets. In addition, by means of the inner limiting pressing pad provided, the outer rubber gasket can be supported against compression from the inside, so that the outer rubber gasket is not easily directly worn and deformed, achieving the effect of double-sealing mechanism for sealing and not easily leaking.

[0016] 2. By means of the hollow chamber provided in the present utility model, after the end fixing plate presses the outer rubber gasket, the side surface of the outer rubber gasket can be abutted against the inner surface of the inner wear-resistant ring to make the sealing operation smoother. In addition, by means of the cross positioning rod, the positioning plug and the rectangular slot provided, the guiding and assembling operation of the central hard ring and the end fixing plate is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is an exploded structure diagram of the present utility model;

[0019] Figure 3 is an exploded structure diagram of the valve core assembly of the present utility model;

[0020] Figure 4 is the present utility model Figure 3 is an enlarged view of part A in;

[0021] Figure 5 is a schematic diagram of the structure of the end fixing plate and the positioning plug of the present utility model;

[0022] Figure 6 This is a cross-sectional view of the central hard ring, outer rubber gasket, and inner limit extrusion pad of the present utility model;

[0023] The meanings of the various reference numerals in the figure are as follows:

[0024] 1. Valve body; 10. Flange; 11. Valve handle seat; 12. Inner wear-resistant ring;

[0025] 2. Valve handle;

[0026] 3. Spool assembly; 30. Spool; 31. Cross positioning rod; 311. Rectangular slot; 32. Central hard ring; 33. Outer rubber gasket; 331. Hollow chamber; 34. Inner limit extrusion pad; 35. End fixing plate; 351. Positioning insert block. Specific embodiments

[0027] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 - 6 , the present utility model provides a technical solution: a double-sealing mechanism butterfly valve with optimized flow channels, including a valve body 1. An inner wear-resistant ring 12 is fixedly installed on the inner wall of the valve body 1. The inner wear-resistant ring 12 and the valve body 1 are of an integrally formed structure. The inner surface of the inner wear-resistant ring 12 is a smooth surface, improving the wear-resistant effect and making it not easy to wear;

[0029] Specifically, a spool assembly 3 is arranged in the valve body 1. The spool assembly 3 includes a spool 30 arranged in the valve body 1 and rotatably connected to the valve body 1. Central hard rings 32 are arranged on both the front and rear side surfaces of the spool 30. An outer rubber gasket 33 is fixedly installed on the outer circumferential side surface of the central hard ring 32. A hollow chamber 331 is arranged inside the outer rubber gasket 33. An inner limit extrusion pad 34 is arranged in the hollow chamber 331. The inner limit extrusion pad 34 is fixedly installed on the circumferential side surface of the central hard ring 32. An end fixing plate 35 is arranged on the outer side surface of the central hard ring 32. The end fixing plate 35 presses and fixes the central hard ring 32 on the spool 30. Specifically, the central hard ring 32 and the end fixing plate 35 are fixedly installed on the spool 30 through a plurality of fastening bolts, realizing convenient fixed installation and disassembly and replacement operations, and achieving the effect of being able to replace the outer rubber gasket 33 in time when it is damaged.

[0030] In this embodiment, the annular side part of the end fixing disc 35 presses against the outer rubber gasket 33, so as to extrude the outer rubber gasket 33, making the side part of the outer rubber gasket 33 fit on the inner surface of the inner wear-resistant ring 12, and making the sealing operation more stable, which is beneficial to improving the sealing effect.

[0031] Specifically, flange plates 10 are fixedly installed at both ends of the valve body 1, and the flange plates 10 are fixedly connected with the external pipelines through a plurality of fastening bolts, which is convenient for pipeline connection operation.

[0032] Furthermore, a valve handle seat 11 is fixedly installed on the valve body 1, a valve handle 2 is fixedly installed on the valve core 30, and the valve handle 2 passes through the valve handle seat 11.

[0033] In addition, cross positioning rods 31 are fixedly installed on the left and right side surfaces of the valve core 30, the central hard ring 32 is sleeved on the cross positioning rods 31, and the sizes of the cross positioning rods 31 are adapted to the size of the central hard ring 32, which is used for guiding and installing the central hard ring 32.

[0034] It should be noted that a rectangular slot 311 is provided at the central position of the cross positioning rod 31, and a positioning plug 351 is fixedly installed at the central position of the side surface of the end fixing disc 35. The positioning plug 351 is in plug-in fit with the rectangular slot 311; the cross-sections of the positioning plug 351 and the rectangular slot 311 are both rectangular, and the size of the positioning plug 351 is adapted to the size of the rectangular slot 311, which is used for the positioning and assembly operation of the end fixing disc 35.

[0035] When the double-sealing mechanism butterfly valve with optimized flow channel of the present utility model is in use, the central hard ring 32 is sleeved on the cross positioning rod 31, then the positioning plug 351 is aligned with the rectangular slot 311 and inserted into the rectangular slot 311, and then the end fixing disc 35 and the central hard ring 32 are fixedly installed on the valve core 30 by using fastening bolts to complete the fixing operation. The annular side part of the end fixing disc 35 presses against the outer rubber gasket 33, so as to extrude the outer rubber gasket 33, and the side part of the outer rubber gasket 33 can be made to fit on the inner surface of the inner wear-resistant ring 12 for sealing operation.

[0036] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A double-seal mechanism butterfly valve with optimized flow path, comprising a valve body (1), characterized in that: An inner wear-resistant ring (12) is fixedly mounted on the inner wall of the valve body (1); a valve core assembly (3) is arranged in the valve body (1); the valve core assembly (3) comprises a valve core (30) arranged in the valve body (1) and rotatably connected to the valve body (1); a central hard ring (32) is arranged on both the front and rear sides of the valve core (30); an outer rubber sealing pad (33) is fixedly mounted on the annular side surface of the central hard ring (32); a hollow chamber (331) is arranged inside the outer rubber sealing pad (333); an inner limit extrusion pad (34) is arranged in the hollow chamber (331); the inner limit extrusion pad (34) is fixedly mounted on the annular side surface of the central hard ring (32); an end fixing disk (35) is arranged on the outer side surface of the central hard ring (32); the end fixing disk (35) presses and fixes the central hard ring (32) on the valve core (30).

2. The double-seal mechanism butterfly valve with optimized flow path according to claim 1 is characterized in that: The inner wear-resistant ring (12) and the valve body (1) are an integrally formed structure, and the inner surface of the inner wear-resistant ring (12) is a smooth surface.

3. The double-seal mechanism butterfly valve with optimized flow path according to claim 1, characterized in that: The central hard ring (32) and the end fixing disk (35) are fixedly mounted on the valve core (30) by means of a plurality of fastening bolts, and the annular side edge of the end fixing disk (35) is pressed tightly against the outer rubber sealing pad (33).

4. The double-seal mechanism butterfly valve with optimized flow path according to claim 1, characterized in that: Flanges (10) are fixedly mounted on both ends of the valve body (1), and the flanges (10) are fixedly connected to external pipelines via a plurality of fastening bolts.

5. The double-seal mechanism butterfly valve with optimized flow path according to claim 1, characterized in that: A valve handle seat (11) is fixedly mounted on the valve body (1), a valve handle (2) is fixedly mounted on the valve core (30), and the valve handle (2) passes through the valve handle seat (11).

6. The double-seal mechanism butterfly valve with optimized flow path according to claim 1, characterized in that: A cross positioning rod (31) is fixedly mounted on both left and right side surfaces of the valve core (30), the central hard ring (32) is sleeved on the cross positioning rod (31), and the size of the cross positioning rod (31) is matched with the size of the central hard ring (32).

7. The double-seal mechanism butterfly valve with optimized flow path according to claim 6, characterized in that: A rectangular slot (311) is provided at the center of the cross positioning rod (31), and a positioning plug block (351) is fixedly installed at the center of the side of the end fixing plate (35), and the positioning plug block (351) is plug-fitted into the rectangular slot (311).

8. The double-seal mechanism butterfly valve with optimized flow path according to claim 7, characterized in that: The cross-sections of the positioning plug block (351) and the rectangular slot (311) are both rectangular, and the size of the positioning plug block (351) is compatible with the size of the rectangular slot (311).

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