Butterfly type inclined check valve

Abstract

The utility model discloses a butterfly type inclined check valve which comprises a butterfly valve body, a supporting seat is fixedly welded to the bottom of the butterfly valve body, a valve clack body is movably installed in the butterfly valve body, flange plates are welded and fixed to the two sides of the butterfly valve body, and the valve clack body comprises a valve plate movably installed in the butterfly valve body. A positioning groove is formed in the outer side of the valve plate and matched with the sealing seat in size, the sealing seat is clamped in the positioning groove, and two sets of driving seats are evenly and fixedly connected to the valve plate. According to the butterfly type inclined check valve, the rubber sealing seat annularly arranged on the outer side of the valve clack body makes contact with the inner wall of the butterfly valve body and extrudes the inner wall of the butterfly valve body, so that the butterfly valve body and the valve clack body are connected in a sealed mode through the annular sealing seat, and the sealing performance of the butterfly valve body when a pipeline is blocked is guaranteed; and the condition of liquid leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, in particular to a butterfly type inclined check valve. Background Art

[0002] The butterfly type inclined check valve is a specially designed check valve, and its working principle is as follows. Normal flow state: When the medium flows normally in the pipeline, the pressure of the fluid pushes the valve flap to overcome the resistance of the spring, the valve flap is opened, and the medium passes through the valve smoothly; Reverse flow state: Once the medium shows a tendency of reverse flow, the pressure of the fluid will act on the valve flap, causing the valve flap to close quickly; At this time, the spring will also assist the valve flap to close faster to prevent the reverse flow of the medium; The unique design of the butterfly type inclined check valve enables it to close more quickly and tightly, effectively preventing the reverse flow of the medium; For example, in an industrial pipeline system, if the pump suddenly stops working, it may cause the reverse flow of the medium, and the butterfly type inclined check valve can prevent this reverse flow in time to protect the pump and other equipment from damage;

[0003] When the valve flap in the butterfly type inclined check valve is in the closed state, there is a gap between the connection between the valve flap and the valve seat, and there is a situation where complete sealing cannot be achieved. To solve this problem, we propose a butterfly type inclined check valve to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a butterfly type inclined check valve to solve the defects mentioned in the above background art.

[0005] To achieve the above purpose, a butterfly type inclined check valve is provided, including a butterfly valve body. A support seat is fixedly welded to the bottom of the butterfly valve body, and a valve flap body is movably installed inside the butterfly valve body. At the same time, flange plates are welded and fixed on both sides of the butterfly valve body. The valve flap body includes a valve plate movably installed inside the butterfly valve body. A positioning groove is opened on the outer side of the valve plate, and the size of the positioning groove is adapted to that of the sealing seat. And the sealing seat is clamped inside the positioning groove. Two groups of driving seats are uniformly fixed on the valve plate, and rotating shaft connection holes are opened inside the two groups of driving seats.

[0006] Preferably, a slot is opened on the surface of the valve plate, and the slot is circularly arranged, and the cross-section of the slot is isosceles trapezoidally arranged.

[0007] Preferably, the cross-section of the positioning groove is dovetail-shaped, and a positioning strip is fixedly arranged on the inner side of the sealing seat, and the cross-section of the positioning strip is dovetail-shaped.

[0008] Preferably, the positioning strip is clamped inside the positioning groove, and the valve plate and the sealing seat are positioned and installed through the positioning groove and the positioning strip.

[0009] Preferably, the gap between the valve flap body and the butterfly valve body is sealed and connected through a sealing seat, and the sealing seat is a detachable structure on the outer side of the butterfly valve body.

[0010] Preferably, a plurality of screw holes are evenly formed in the inner wall of the positioning groove, and a plurality of insertion holes are evenly formed in the circumferential position on the outer side of the sealing seat. At the same time, the number of the insertion holes is the same as that of the screw holes, and the size of the screw holes is adapted to that of the fixing bolts. The fixing bolts pass through the insertion holes and are screwed and fixed inside the screw holes.

[0011] Preferably, the sealing seat is clamped inside the positioning groove and is screwed and fixed through a plurality of equally spaced fixing bolts, and the sealing seat is an annular structure made of rubber material.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, the rubber sealing seat annularly arranged on the outer side of the valve flap body contacts and presses against the inner wall of the butterfly valve body, so that the butterfly valve body and the valve flap body are sealed and connected through the annular sealing seat, ensuring the sealing performance of the butterfly valve body when blocking the pipeline and preventing liquid leakage.

[0014] 2. When the sealing seat is installed in the present utility model, the valve plate and the sealing seat are positioned and installed through the positioning groove and the positioning strip. The cross-sections of the positioning strip and the positioning groove are both dovetail-shaped structures, which can increase the connection area between the sealing seat and the positioning groove. The sealing seat is clamped inside the positioning groove and is screwed and fixed through a plurality of equally spaced fixing bolts, ensuring the stability of the sealing seat and the positioning groove after being fixed. After the sealing seat is fixed, especially when impacted by water flow, it will not fall off, ensuring the stability and reliability of the sealing seat during operation. 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 Figure 1 the front view of

[0017] Figure 3 is Figure 1 the top view of

[0018] Figure 4 is a schematic diagram of the valve flap body;

[0019] Figure 5 is Figure 4 the rear view of

[0020] Figure 6 is Figure 4 the sectional structure schematic diagram of

[0021] Figure 7 For Figure 6 the enlarged structural schematic diagram at position A in

[0022] Reference numerals in the figure: 1, butterfly valve body; 2, support seat; 3, flange; 4, valve flap body; 41, valve plate; 42, drive seat; 43, positioning groove; 44, screw hole; 45, sealing seat; 451, positioning strip; 46, insertion hole; 47, slot; 48, fixing bolt. Specific embodiments

[0023] Please refer to Figures 1-7 , the present utility model provides a butterfly - type inclined check valve, including a butterfly valve body 1, a support seat 2 fixedly welded to the bottom of the butterfly valve body 1, and a valve flap body 4 movably installed inside the butterfly valve body 1. At the same time, flanges 3 are welded and fixed on both sides of the butterfly valve body 1. The valve flap body 4 includes a valve plate 41 movably installed inside the butterfly valve body 1, and a positioning groove 43 is opened on the outer side of the valve plate 41. At the same time, the dimensions of the positioning groove 43 are adapted to those of the sealing seat 45, and the sealing seat 45 is clamped inside the positioning groove 43. Two groups of drive seats 42 are fixedly connected to the valve plate 41 evenly, and shaft connection holes are opened inside both groups of drive seats 42.

[0024] Working principle: When an operator is using it, flanges 3 are installed on both sides of the butterfly valve body 1 at this time, and the butterfly valve body 1 is fixedly arranged on the connecting pipeline through the flanges 3 on both sides. When the inside of the butterfly valve body 1 is in a closed state, the rubber - material sealing seat 45 annularly arranged on the outer side of the valve flap body 4 contacts and presses against the inner wall of the butterfly valve body 1, so that the butterfly valve body 1 and the valve flap body 4 are hermetically connected through the annular sealing seat 45, ensuring the sealing performance of the butterfly valve body 1 when blocking the pipeline and preventing liquid leakage; when the sealing seat 45 is installed, the valve plate 41 and the sealing seat 45 are positioned and installed through the positioning groove 43 and the positioning strip 451. The cross - sections of the positioning strip 451 and the positioning groove 43 are both dovetail - shaped structures, which can increase the connection area between the sealing seat 45 and the positioning groove 43. Finally, a plurality of fixing bolts 48 pass through the insertion holes 46 and are screwed and fixed inside the screw holes 44; the sealing seat 45 is clamped inside the positioning groove 43 and is screwed and fixed by a plurality of equally - spaced fixing bolts 48, ensuring the stability of the sealing seat 45 and the positioning groove 43 after being fixed. After the sealing seat 45 is fixed, especially when impacted by water flow, it will not fall off, ensuring the stability and reliability of the sealing seat 45 during operation.

[0025] As a preferred embodiment, a slot 47 is opened on the surface of the valve plate 41, and the slot 47 is circularly arranged. At the same time, the cross - section of the slot 47 is isosceles trapezoid - shaped.

[0026] The cross-section of the positioning groove 43 is arranged in a dovetail shape, and a positioning strip 451 is fixedly arranged inside the sealing seat 45. At the same time, the cross-section of the positioning strip 451 is arranged in a dovetail shape.

[0027] As a preferred implementation manner, the positioning strip 451 is clamped inside the positioning groove 43, and the valve plate 41 and the sealing seat 45 are positioned and installed through the positioning groove 43 and the positioning strip 451.

[0028] The gap between the valve flap body 4 and the butterfly valve body 1 is hermetically connected through the sealing seat 45. At the same time, the sealing seat 45 is a detachable structure on the outer side of the butterfly valve body 1.

[0029] As a preferred implementation manner, a plurality of screw holes 44 are evenly formed on the inner wall of the positioning groove 43, and a plurality of insertion holes 46 are evenly formed in the circumferential position on the outer side of the sealing seat 45. At the same time, the number of the insertion holes 46 is the same as that of the screw holes 44, and the screw holes 44 are adapted to the size of the fixing bolts 48. The fixing bolts 48 pass through the insertion holes 46 and are screwed and fixed inside the screw holes 44.

[0030] The sealing seat 45 is clamped inside the positioning groove 43 and is screwed and fixed through a plurality of fixing bolts 48 arranged at equal intervals. The sealing seat 45 is an annular structure made of rubber material.

Claims

1. Butterfly type inclined check valve, comprising a butterfly valve body (1), characterized in that: A support seat (2) is fixedly welded to the bottom of the butterfly valve body (1). A valve flap body (4) is movably installed inside the butterfly valve body (1). Flange plates (3) are fixedly welded to both sides of the butterfly valve body (1). The valve flap body (4) includes a valve plate (41) movably installed inside the butterfly valve body (1). A positioning groove (43) is formed on the outer side of the valve plate (41). The size of the positioning groove (43) is adapted to that of the sealing seat (45). The sealing seat (45) is clamped inside the positioning groove (43). Two groups of driving seats (42) are evenly fixed to the valve plate (41). Rotating shaft connection holes are formed inside both groups of driving seats (42).

2. The butterfly type inclined check valve according to claim 1, characterized in that: A slot (47) is formed on the surface of the valve plate (41). The slot (47) is circular. The cross-section of the slot (47) is isosceles trapezoidal.

3. The butterfly type inclined check valve according to claim 1, characterized in that: The cross-section of the positioning groove (43) is dovetail-shaped. A positioning strip (451) is fixedly arranged on the inner side of the sealing seat (45). The cross-section of the positioning strip (451) is dovetail-shaped.

4. The butterfly type inclined check valve according to claim 3, characterized in that: The positioning strip (451) is clamped inside the positioning groove (43). The valve plate (41) and the sealing seat (45) are positioned and installed through the positioning groove (43) and the positioning strip (451).

5. The butterfly type inclined check valve according to claim 1, characterized in that: The gap between the valve flap body (4) and the butterfly valve body (1) is sealed and connected through the sealing seat (45). The sealing seat (45) is a detachable structure on the outer side of the butterfly valve body (1).

6. The butterfly-type inclined check valve according to claim 1, wherein: A plurality of screw holes (44) are evenly formed on the inner wall of the positioning groove (43). A plurality of insertion holes (46) are evenly formed in the circumferential position on the outer side of the sealing seat (45). The number of the insertion holes (46) is the same as that of the screw holes (44). The size of the screw holes (44) is adapted to that of the fixing bolts (48). The fixing bolts (48) pass through the insertion holes (46) and are screwed and fixed inside the screw holes (44).

7. The butterfly type inclined check valve according to claim 6, wherein: The sealing seat (45) is clamped inside the positioning groove (43) and is screwed and fixed through a plurality of equidistantly arranged fixing bolts (48). The sealing seat (45) is an annular structure made of rubber material.

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