Double-shaft single-layer labyrinth type sealing butterfly valve

Abstract

The utility model relates to the technical field of valves, and particularly discloses a double-shaft single-layer labyrinth type sealing butterfly valve which comprises a valve body frame, a check ring is arranged on the inner side of the valve body frame, two symmetrically-distributed valve shafts are arranged on the inner side of the valve body frame, a valve plate is arranged on the outer side of a flow channel opening, an upper labyrinth groove is formed in the outer side of the valve plate, and a lower labyrinth groove is formed in the outer side of the upper labyrinth groove. A lower labyrinth groove is formed in the outer side of the check ring, and reinforcing keels distributed at equal intervals are fixedly connected to the outer side of the valve plate. When the valve plate is closed, the upper labyrinth groove and the lower labyrinth groove are clamped with each other to enable the valve plate to be tightly attached to the check ring, the overall stability of the valve plate can be greatly improved under the action of the reinforcing keel, the phenomenon of deformation under the action of pressure is avoided, and after the butterfly valve is closed, the valve plate is not prone to deformation. The joint of the valve shaft and the valve body frame and the joint of the valve plate and the flow channel opening are well sealed, so that the butterfly valve has good sealing performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a double-axis single-layer labyrinth sealing butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on-off control of low-pressure pipeline media. A butterfly valve has a disc as its closing member, which rotates around the valve axis to open and close. The butterfly valve's opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing, or regulation. It can be widely used in petroleum, chemical, cement, and power waste heat boiler systems. It is installed on medium and low temperature flue gas pipelines and receives adjustment signals for automatic control or cutoff.

[0003] In the Chinese patent publication number CN221033990U, a butterfly valve is mentioned. The filtering mechanism can prevent large particles of impurities from entering the valve body through the filter screen, thereby avoiding the situation where the butterfly valve core cannot open and close normally due to large particles of impurities adhering to the butterfly valve core or valve body. The cleaning brush can clean the filter screen to prevent the filter screen from being blocked, thereby ensuring the normal operation of the butterfly valve.

[0004] Most butterfly valves in the prior art are arranged with a single valve plate, and the structure of the valve plate is simple, which leads to low overall strength of the valve plate and easy loosening, resulting in reduced sealing effect and easy leakage, and poor practicality. For this reason, we propose a dual-axis single-layer labyrinth sealing butterfly valve. Utility Model Content

[0005] The purpose of the utility model is to provide a double-axis single-layer labyrinth sealing butterfly valve to solve the problem in the prior art that the valve plate has low overall strength and is prone to deformation, thereby reducing the sealing effect.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A dual-axis single-layer labyrinth sealing butterfly valve comprises a valve body frame, a retaining ring is provided on the inner side of the valve body frame, two symmetrically distributed flow openings are provided on the outer side of the retaining ring, two symmetrically distributed valve shafts are provided on the inner side of the valve body frame, a valve plate is provided on the outer side of the flow opening, an upper labyrinth groove is provided on the outer side of the valve plate, a lower labyrinth groove is provided on the outer side of the retaining ring, and reinforcing keels distributed at equal intervals are fixedly connected to the outer side of the valve plate.

[0008] Preferably, both ends of the valve shaft pass through the valve body frame and extend to the outside of the valve body frame, and the left ends of the two valve shafts are fixedly connected to connecting rods.

[0009] Preferably, a same movable rod is provided between the two connecting rods.

[0010] Preferably, a cavity is provided on the outer side of the valve plate, and the valve shaft is fixedly connected to the inner side of the cavity.

[0011] Preferably, a through electric actuator connection hole is provided on the outer side of one of the connecting rods.

[0012] Preferably, a shaft seal is provided on the outer side of the valve shaft, and the outer sides of the two valve shafts are movably connected to the valve body frame via bearings.

[0013] Preferably, a sealing ring is fixedly connected to the outer side of the valve plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The arrangement of the retaining ring, valve plate, lower labyrinth groove, upper labyrinth groove and reinforced keel of the utility model can make the valve plate and the retaining ring fit tightly under the mutual engagement of the upper labyrinth groove and the lower labyrinth groove when the valve plate is closed, and can greatly improve the overall stability of the valve plate under the action of the reinforced keel, avoid deformation under pressure, and make the butterfly valve have good sealing performance.

[0016] 2. The utility model has the functions of full opening and closing and arbitrary angle adjustment when in use through the arrangement of the valve shaft, valve plate and connecting rod, which controls the full circulation, closing or adjustment of the pipeline medium. In addition, the structure is optimized on the basis of the original ordinary butterfly valve, which retains the lightweight structure of the ordinary butterfly valve for opening and closing, and improves the sealing of the valve. The cost is controllable and the cost performance is high.

[0017] 3. The utility model provides bearings, shaft seals and sealing rings, so that after the butterfly valve is closed, the connection between the valve shaft and the valve body frame and the connection between the valve plate and the flow channel opening are well sealed, thereby further improving the sealing effect of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the three-dimensional diagrams of the present utility model;

[0019] Figure 2 This is the second stereogram of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection between the valve plate and the valve shaft of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection between the connecting rod and the movable rod of the utility model;

[0022] Figure 5 This is a schematic diagram of the valve plate of the present invention.

[0023] In the figure: 1. Valve body frame; 2. Retaining ring; 3. Connecting rod; 4. Movable rod; 5. Lower labyrinth groove; 6. Valve plate; 7. Bearing; 8. Upper labyrinth groove; 9. Sealing ring; 10. Shaft seal; 11. Valve shaft; 12. Electric actuator connection hole; 13. Reinforced keel; 14. Cavity. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Reference Figure 1-Figure 5 As shown, the utility model provides a dual-axis single-layer labyrinth sealing butterfly valve, including a valve body frame 1, a retaining ring 2 is provided on the inner side of the valve body frame 1, and reinforcing strips distributed at equal intervals are provided on the outer side of the retaining ring 2. Two symmetrically distributed flow openings are provided on the outer side of the retaining ring 2, and the flow openings are used for the passage of flue gas or fluid. Two symmetrically distributed valve shafts 11 are provided on the inner side of the valve body frame 1, and a valve plate 6 is provided on the outer side of the flow opening. The valve plate 6 is used to block the flow opening, thereby closing the flow of flue gas or fluid, and an upper labyrinth groove 8 is provided on the outer side of the valve plate 6, and a lower labyrinth groove 5 is provided on the outer side of the retaining ring 2. The upper labyrinth groove 8 and the lower labyrinth groove 5 are adapted to each other and can be engaged with each other. The outer side of the valve plate 6 is fixedly connected with reinforcing keels 13 distributed at equal intervals, and the reinforcing keels 13 improve the strength of the valve plate 6.

[0026] In a further embodiment, referring to Figures 1-4 , both ends of the valve shaft 11 pass through the valve body frame 1 and extend to the outside of the valve body frame 1. The rotation of the valve shaft 11 can be controlled on the outside of the valve body frame 1 to control the opening or closing of the valve plate 6. The left ends of the two valve shafts 11 are fixedly connected to the connecting rod 3, and the rotation can drive the valve shaft 11 fixedly connected thereto to rotate. The same movable rod 4 is arranged between the two connecting rods 3, and the outside of the connecting rod 3 is fixedly connected to a connecting shaft for connecting the movable rod 4. The movable rod 4 is movably connected to the outside of the connecting shaft through a bearing 7. Under the action of the movable rod 4, when one of the connecting rods 3 rotates, the other connecting rod 3 can be driven to rotate synchronously. A penetrating electric actuator connecting hole 12 is opened on the outside of one of the connecting rods 3, and the electric actuator connecting hole 12 is used for the connection between the electric actuator and the connecting rod 3.

[0027] In this embodiment, the butterfly valve is connected to an external electric actuator through the electric actuator connection hole 12, and the opening and closing of the valve plate 6 is controlled by the electric actuator, so that the butterfly valve has the functions of full opening and closing and arbitrary angle adjustment, and controls the full circulation, closing or adjustment of the pipeline medium.

[0028] In a further embodiment, referring to Figure 3 and Figure 5 A cavity 14 is provided on the outside of the valve plate 6, and the cavity 14 is used for the valve shaft 11 to pass through. The valve plate 6 is fixed to the outside of the valve shaft 11 through the cavity 14. When the valve shaft 11 rotates, the valve plate 6 can be driven to flip. The valve shaft 11 is fixedly connected to the inside of the cavity 14, and a shaft seal 10 is provided on the outside of the valve shaft 11. The shaft seal 10 is provided at the connection between the valve shaft 11 and the valve body frame 1 to seal the connection between the valve shaft 11 and the valve body frame 1 to prevent leakage of flue gas or fluid. The outsides of the two valve shafts 11 are movably connected to the valve body frame 1 through bearings 7. A sealing ring 9 is fixedly connected to the outside of the valve plate 6. The sealing ring 9 is used to ensure the sealing of the valve plate 6 and the flow channel when the valve plate 6 is closed, so as to prevent leakage from gaps between the valve plate 6 and the flow channel.

[0029] In this embodiment, the shaft seal 10 and the sealing ring 9 can improve the overall sealing performance of the butterfly valve, so that the butterfly valve has a good sealing effect when it is opened or closed.

[0030] It should be noted that the electric actuator for the valve is an existing technology and is well known in the art, so it will not be described in detail here.

[0031] The working principle of this utility model is as follows:

[0032] The valve body frame 1 is connected to the flue gas duct through the flange hole opened on the outside of the valve body frame 1, and after the connection, the connecting rod 3 is connected to the external electric actuator through the electric actuator connection hole 12 opened on the outside of the connecting rod 3;

[0033] When the valve is opened or closed, the external electric actuator can drive the connecting rod 3 connected to it to move, drive the valve shaft 11 connected to it to rotate and drive another connecting rod 3 to rotate synchronously through the movable rod 4, thereby controlling the opening and closing of the valve plate 6. By controlling the movement range of the connecting rod 3, the gap between the valve plate 6 and the flow channel opening can be adjusted;

[0034] When the valve plate 6 and the retaining ring 2 are closed, the upper labyrinth groove 8 and the lower labyrinth groove 5 engage with each other to form a mechanical labyrinth sealing barrier, so that there is no internal leakage on both sides of the valve plate 6.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-axis single-layer labyrinth seal butterfly valve, comprising a valve body frame (1), characterized in that: A retaining ring (2) is provided on the inner side of the valve body frame (1), two symmetrically distributed flow openings are provided on the outer side of the retaining ring (2), two symmetrically distributed valve shafts (11) are provided on the inner side of the valve body frame (1), a valve plate (6) is provided on the outer side of the flow opening, an upper labyrinth groove (8) is provided on the outer side of the valve plate (6), a lower labyrinth groove (5) is provided on the outer side of the retaining ring (2), and the outer side of the valve plate (6) is fixedly connected with reinforced keels (13) distributed at equal intervals.

2. The dual-axis single-layer labyrinth seal butterfly valve according to claim 1, characterized in that: Both ends of the valve shaft (11) pass through the valve body frame (1) and extend to the outside of the valve body frame (1), and the left ends of the two valve shafts (11) are fixedly connected to the connecting rod (3).

3. The dual-axis single-layer labyrinth seal butterfly valve according to claim 2, characterized in that: A common movable rod (4) is arranged between the two connecting rods (3).

4. The dual-axis single-layer labyrinth seal butterfly valve according to claim 1, characterized in that: A cavity (14) is provided on the outside of the valve plate (6), and the valve shaft (11) is fixedly connected to the inside of the cavity (14).

5. The dual-axis single-layer labyrinth seal butterfly valve according to claim 2, characterized in that: An electric actuator connection hole (12) is provided on the outer side of one of the connecting rods (3).

6. The dual-axis single-layer labyrinth seal butterfly valve according to claim 1, characterized in that: A shaft seal (10) is provided on the outside of the valve shaft (11), and the outsides of the two valve shafts (11) are movably connected to the valve body frame (1) via bearings (7).

7. The dual-axis single-layer labyrinth seal butterfly valve according to claim 1, characterized in that: A sealing ring (9) is fixedly connected to the outer side of the valve plate (6).

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