Novel sealing dust and gas butterfly valve

Abstract

The utility model discloses a novel sealing dust gas butterfly valve which comprises a valve frame, a main valve plate and an auxiliary valve plate, the main valve plate and the auxiliary valve plate are installed in the valve frame, an installation hole is formed in the middle of the main valve plate, the auxiliary valve plate is embedded in the installation hole, the upper end and the lower end of the installation hole extend along the central axis of the main valve plate to form shaft sleeves, and the shaft sleeves extend out of the valve frame. Main shafts extending along the central axis of the auxiliary valve plate are arranged at the upper end and the lower end of the auxiliary valve plate, the main shafts at the upper end and the lower end are nested in the shaft sleeve, opening and closing are more convenient, and meanwhile the maximum value and the minimum value of the opening and closing range of the valve plate are increased and reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment technology, specifically a novel sealing dust and gas butterfly valve. Background Technology

[0002] Butterfly valves are a common type of valve, mainly used for flow control and shut-off in pipeline systems. Dust and gas butterfly valves are a special type of butterfly valve, mainly used in dusty gas pipelines, gas pipelines, ventilation and purification devices, flue gas pipelines, and other applications.

[0003] Butterfly valves in the existing technology are usually set with a single valve plate. The single valve plate is not flexible enough in terms of flow control range adjustment, the opening and closing start is relatively high, and the opening and closing degree is quite limited, which has technical defects. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a novel sealing dust and gas butterfly valve to solve the technical issues raised in the background section.

[0005] To achieve the above objectives, this utility model proposes a novel sealed dust and gas butterfly valve, comprising a valve frame and a main valve plate and a secondary valve plate installed within the valve frame. The main valve plate has a mounting hole in the middle, and the secondary valve plate is embedded in the mounting hole. Both the upper and lower ends of the mounting hole are provided with bushings extending along the central axis of the main valve plate, and the bushings extend to the outside of the valve frame. The upper and lower ends of the bushings are open and hollow inside. The upper and lower ends of the secondary valve plate are provided with main shafts extending along the central axis of the secondary valve plate, and the main shafts at the upper and lower ends are nested in the bushings.

[0006] Preferably, valve shaft packing chambers are fixedly connected to both the upper and lower ends of the valve frame, and main valve positioning bearings are nested in both the upper and lower valve shaft packing chambers.

[0007] Preferably, the main valve actuator and the auxiliary valve actuator are respectively installed on the valve shaft packing chambers at the upper and lower ends of the valve frame.

[0008] Preferably, a secondary valve positioning bearing and a positioning key are provided on the outer side of the transmission shaft between the upper and lower ends of the secondary valve plate and the main valve plate.

[0009] Preferably, the auxiliary valve positioning bearing is a thrust bearing.

[0010] Preferably, flexible graphite packing is used in the valve shaft packing chamber.

[0011] The beneficial effects of this utility model are as follows:

[0012] By setting a main valve plate with mounting holes and installing a secondary valve plate in the mounting holes, the main shafts at the upper and lower ends of the secondary valve plate are respectively nested in the bushings at the upper and lower ends of the mounting holes. The opening and closing of the main valve plate and the secondary valve plate are controlled by the main valve actuator and the secondary valve actuator respectively located at the upper and lower ends of the valve shaft stuffing chamber. At the same time, the maximum and minimum values ​​of the flow range that the valve plate can control are increased and decreased, and the switching is more flexible. In addition, when the main valve plate is parallel to the valve frame surface, the secondary valve plate can be used as a quick-opening valve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0014] Figure 2 This is a side sectional view of the present invention.

[0015] Explanation of annotations in the diagram

[0016] 1. Valve frame; 101. Valve shaft packing chamber; 102. Main valve positioning bearing; 103. Auxiliary valve positioning bearing; 2. Main valve plate; 201. Bushing; 3. Auxiliary valve plate; 301. Main shaft; 302. Positioning key; 4. Main valve actuator; 401. Auxiliary valve actuator. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0018] Combination Figure 1-2 This utility model discloses a novel sealed dust and gas butterfly valve, including a valve frame 1 and a main valve plate 2 and a secondary valve plate 3 installed in the valve frame 1. The main valve plate 2 has a mounting hole in the middle, and the secondary valve plate 3 is embedded in the mounting hole. Both the upper and lower ends of the mounting hole are provided with bushings 201 extending along the central axis of the main valve plate 2. The bushings 201 extend to the outside of the valve frame 1. The upper and lower ends of the bushings 201 are open and hollow inside. The upper and lower ends of the secondary valve plate 3 are provided with main shafts 301 extending along the central axis of the secondary valve plate 3. The main shafts 301 at the upper and lower ends are nested in the bushings 201.

[0019] Furthermore, valve shaft packing chambers 101 are fixedly connected to both the upper and lower ends of the valve frame 1, and main valve positioning bearings 102 are nested inside both the upper and lower valve shaft packing chambers 101.

[0020] Furthermore, a main valve actuator 4 and a secondary valve actuator 401 are respectively installed on the valve shaft packing chambers 101 at the upper and lower ends of the valve frame 1.

[0021] Furthermore, a secondary valve positioning bearing 103 and a positioning key 302 are provided on the outer side of the transmission shaft between the upper and lower ends of the secondary valve plate 3 and the main valve plate 2.

[0022] Furthermore, the auxiliary valve positioning bearing 103 is a thrust bearing.

[0023] Furthermore, flexible graphite packing is used in the valve shaft packing chamber 101.

[0024] By setting a main valve plate 2 with mounting holes and installing a secondary valve plate 3 in the mounting holes, the main shafts 301 at the upper and lower ends of the secondary valve plate 3 are respectively nested in the bushings 201 at the upper and lower ends of the mounting holes. The opening and closing of the main valve plate 2 and the secondary valve plate 3 are controlled by the main valve actuator 4 and the secondary valve actuator 401 respectively located outside the valve shaft packing chamber 101 at the upper and lower ends of the valve frame 1. At the same time, the maximum and minimum values ​​of the flow range that the valve plate can control are increased and decreased, and the switching is more flexible. In addition, when the main valve plate 2 is parallel to the surface of the valve frame 1, the secondary valve plate 3 can be used as a quick-opening valve.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel sealed dust-proof butterfly valve, comprising a valve frame (1) and a main valve plate (2) and a secondary valve plate (3) installed within the valve frame (1), characterized in that: The main valve plate (2) has a mounting hole in the middle, and the auxiliary valve plate (3) is fitted into the mounting hole. Both the upper and lower ends of the mounting hole are extended with bushings (201) along the central axis of the main valve plate (2). The bushings (201) extend to the outside of the valve frame (1). The upper and lower ends of the bushings (201) are open and hollow inside. The upper and lower ends of the auxiliary valve plate (3) are provided with main shafts (301) extending along the central axis of the auxiliary valve plate (3). The main shafts (301) at the upper and lower ends are nested in the bushings (201).

2. The novel sealing dust-proof butterfly valve according to claim 1, characterized in that: The valve frame (1) is fixedly connected to valve shaft packing chambers (101) at both the upper and lower ends, and main valve positioning bearings (102) are nested in the valve shaft packing chambers (101) at both the upper and lower ends.

3. The novel sealing dust-proof butterfly valve according to claim 2, characterized in that: The main valve actuator (4) and the auxiliary valve actuator (401) are respectively installed on the valve shaft packing chambers (101) at the upper and lower ends of the valve frame (1).

4. The novel sealing dust-proof butterfly valve according to claim 1, characterized in that: The auxiliary valve plate (3) is provided with an auxiliary valve positioning bearing (103) and a positioning key (302) on the outside of the transmission shaft between the upper and lower ends of the auxiliary valve plate (3) and the main valve plate (2).

5. A novel sealing dust-proof butterfly valve according to claim 4, characterized in that: The auxiliary valve positioning bearing (103) is a thrust bearing.

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