Butterfly valve

Abstract

The utility model discloses a butterfly valve which comprises a valve body, a valve shaft installed in the middle of the valve body, a connecting piece connected to the outer wall of the valve shaft and a raft blade installed under the cooperation of a dismounting mechanism, the dismounting mechanism comprises an inserting groove formed in the side wall of the connecting piece, and the raft blade is inserted into the inserting groove. Inserting blocks are inserted above the raft plate blades, the top ends of the inserting blocks are connected to the bottom ends of sliding plates, the two sides of the sliding plates slide in sliding rails, the sliding rails are symmetrically formed in limiting grooves, the limiting grooves are formed in connecting pieces, connecting rods are connected to the top ends of the sliding plates, and the top ends of the connecting rods penetrate through the outer walls of the connecting pieces and are connected to the bottom end of a cover plate; the two sides of the cover plate are connected to the connecting pieces through bolts. The inserting grooves are formed in the side walls of the connecting pieces, and the raft blades and the connecting pieces are disassembled and assembled between the raft blades and the inserting grooves under the action of the disassembling and assembling mechanism, so that the corroded raft blades can be conveniently replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of butterfly valves, and particularly relates to butterfly valves. Background Art

[0002] A butterfly valve is a relatively simple regulating valve, which is usually mainly used for cutting off or throttling various types of fluids such as water, various corrosive media, mud, oil products, liquid metals, etc. in a pipeline.

[0003] After the existing butterfly valve is used for a long time, the blades are easily corroded. Since the blades and the shaft are directly welded together, the replacement operation is relatively cumbersome. Summary of the Utility Model

[0004] The utility model aims at the problems existing in the prior art and proposes the following technical solutions:

[0005] A butterfly valve, comprising a valve body, a valve shaft installed in the middle of the valve body, a connecting piece connected to the outer wall of the valve shaft, and a raft blade installed under the cooperation of a disassembly and assembly mechanism. The disassembly and assembly mechanism includes a plugging groove opened on the side wall of the connecting piece, and a raft blade is plugged in the plugging groove. A plugging block is plugged above the raft blade. The top end of the plugging block is connected to the bottom end of a sliding plate. Both sides of the sliding plate slide in a sliding rail. The sliding rails are symmetrically opened in a limiting groove. The limiting groove is opened in the connecting piece. The top end of the sliding plate is connected to a connecting rod, and the top end of the connecting rod penetrates through the outer wall of the connecting piece and is connected to the bottom end of a cover plate. Both sides of the cover plate are connected to the connecting piece by bolts.

[0006] A plugging groove is opened on the side wall of the connecting piece. Under the action of the disassembly and assembly mechanism between the raft blade and the plugging groove, the disassembly and assembly work between the raft blade and the connecting piece is completed, so that the corroded raft blade can be replaced conveniently.

[0007] As a preference of the above technical solution, an elastic member is connected to the inner wall of the limiting groove, and the bottom end of the elastic member is connected to the top end of the sliding plate.

[0008] Under the action of the elastic potential energy of the elastic member, the sliding plate and the plugging block are driven to perform telescopic movement in the limiting groove.

[0009] As a preference of the above technical solution, a soft pad is glued to the inner wall of the plugging groove, and the soft pad abuts against the outer wall of the raft blade.

[0010] Under the protection of the soft pad, the situation that the end of the raft blade directly contacts the plugging groove and causes damage is avoided. At the same time, under the elastic action of the soft pad, the raft blade can be conveniently withdrawn from the plugging groove.

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

[0012] In this application, a plug-in groove is provided on the side wall of the connecting piece. Under the action of the disassembly and assembly mechanism between the raft blade and the plug-in groove, the disassembly and assembly work between the raft blade and the connecting piece is completed, enabling the convenient replacement of the corroded raft blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic structural diagram in the front view state provided by the embodiment of the present utility model shown;

[0014] Figure 2 Shown in the embodiment of the present utility model provided Figure 1 Internal structural schematic diagram of the partial top view state of the connecting piece and the raft blade.

[0015] Legend:

[0016] 1. Valve body; 2. Valve shaft; 3. Connecting piece; 4. Raft blade; 5. Plug-in groove; 6. Soft pad; 7. Plug-in block; 8. Connecting rod; 9. Cover plate; 10. Bolt; 11. Elastic member; 12. Limiting groove; 13. Slide plate; 14. Slide rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0018] In view of the problem that the raft blade 4 of the butterfly valve is prone to corrosion after long-term use in the prior art, and since the raft blade 4 and the valve shaft 2 are directly welded together, the replacement operation is relatively cumbersome. In this application, a plug-in groove 5 is provided on the side wall of the connecting piece 3. Under the action of the limiting mechanism between the raft blade 4 and the plug-in groove 5, the disassembly and assembly work between the raft blade 4 and the connecting piece 3 is completed, enabling the convenient replacement of the corroded raft blade 4.

[0019] As Figure 1 and Figure 2 shown, in the embodiment of the present utility model, the butterfly valve includes a valve body 1, a valve shaft 2 installed in the middle of the valve body 1, a connecting piece 3 connected to the outer wall of the valve shaft 2, and a raft blade 4 installed under the combined use of a disassembly and assembly mechanism; the raft blade 4 performs opening and closing operations in the valve body 1 under the action of the valve shaft 2, which is well known to those skilled in the art and will not be elaborated in this application.

[0020] As Figure 1 and Figure 2As shown in the figure, the disassembly and assembly mechanism includes a plugging groove 5 formed on the side wall of the connecting piece 3, and a raft blade 4 is plugged in the plugging groove 5. A plugging block 7 is plugged above the raft blade 4. The top end of the plugging block 7 is connected to the bottom end of the sliding plate 13. Both sides of the sliding plate 13 slide in the slide rail 14. The slide rail 14 is symmetrically formed in the limiting groove 12. The limiting groove 12 is formed in the connecting piece 3. The top end of the sliding plate 13 is connected with a connecting rod 8, and the top end of the connecting rod 8 penetrates through the outer wall of the connecting piece 3 and is connected to the bottom end of the cover plate 9. Both sides of the cover plate 9 are connected to the connecting piece 3 by bolts 10. When a new raft blade 4 needs to be installed, first pull out the bolts 10 from both sides of the cover plate 9, and then pull the cover plate 9 upward. With the sliding action of the sliding plate 13 and the slide rail 14, the plugging block 7 is driven to move into the limiting groove 12, so as to release the locking state between the plugging block 7 and the raft blade 4. Then, the raft blade 4 can be pulled out from the plugging groove 5 to the outside. The inner wall of the limiting groove 12 is connected with an elastic member 11, and the bottom end of the elastic member 11 is connected to the top end of the sliding plate 13. Under the action of the elastic potential energy of the elastic member 11, the sliding plate 13 and the plugging block 7 are driven to move telescopically in the limiting groove 12. The inner wall of the plugging groove 5 is adhesively bonded with a soft pad 6, and the soft pad 6 abuts against the outer wall of the raft blade 4. Under the protection of the soft pad 6, the situation that the end of the raft blade 4 directly contacts the plugging groove 5 and causes damage is avoided. At the same time, under the elastic action of the soft pad 6, the raft blade 4 can be conveniently pulled out from the plugging groove 5.

[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A butterfly valve, comprising a valve body (1), a valve shaft (2) installed in the middle of the valve body (1), a connecting piece (3) connected to the outer wall of the valve shaft (2), and a raft blade (4) installed in cooperation with a disassembly and assembly mechanism, characterized in that: The disassembly and assembly mechanism comprises a plug-in slot (5) provided on the side wall of the connecting piece (3), and a raft blade (4) is plugged into the plug-in slot (5), a plug-in block (7) is plugged into the top of the raft blade (4), the top of the plug-in block (7) is connected to the bottom of a slide plate (13), both sides of the slide plate (13) slide in a slide rail (14), the slide rail (14) is symmetrically provided in a limiting slot (12), the limiting slot (12) is provided in the connecting piece (3), the top of the slide plate (13) is connected to a connecting rod (8), and the top of the connecting rod (8) passes through the outer wall of the connecting piece (3) and is connected to the bottom of a cover plate (9), and both sides of the cover plate (9) are connected to the connecting piece (3) by bolts (10).

2. The butterfly valve according to claim 1, characterized in that: The inner wall of the limiting groove (12) is connected to an elastic member (11), and the bottom end of the elastic member (11) is connected to the top end of the slide plate (13).

3. The butterfly valve according to claim 1, characterized in that: A soft pad (6) is glued to the inner wall of the plug-in groove (5), and the soft pad (6) abuts against the outer wall of the raft blade (4).

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