Double-layer flap valve

Abstract

The utility model relates to the technical field of flap valves, in particular to a double-layer flap valve which comprises a box body, an upper-layer flap valve assembly and a lower-layer flap valve assembly. Each of the upper-layer flap valve assembly and the lower-layer flap valve assembly comprises a material guide conical hopper, a flap, a valve shaft, a dust blocking assembly and a bearing seat; the material guiding conical hopper is arranged on the discharging part, the valve shaft is rotationally connected to the protruding part, and the two ends of the valve shaft penetrate through the dust blocking assembly to be connected with the bearing seats correspondingly; the dust blocking assemblies are arranged on the two sides of the outer wall of the box body. Supporting blocks are arranged on the two sides of the outer wall of the box body, and the bearing seats are arranged on the supporting blocks and away from the dust blocking assembly; a gravity assembly is arranged at the end, away from the box, of the valve shaft. The turning plate is circumferentially fixed on the valve shaft; the dust blocking assembly comprises a dust blocking sleeve and a dust blocking cover; the dust blocking sleeve is arranged on the outer wall of the box body, the dust blocking cover is connected with the dust blocking sleeve through screws, and the dust blocking cover and the dust blocking sleeve form a dust collecting cavity. And dust cannot directly enter a gap between the valve shaft and the bearing seat due to the arrangement of the dust blocking assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of flap valves, in particular to a double-layer flap valve. Background Art

[0002] In a dust removal system, the bearing seat of a flap valve is usually arranged close to the box body. Dust in the box body can easily enter the gap between the valve shaft and the bearing seat directly through the shaft hole of the box body under the drive of air flow. Over time, this dust gradually accumulates in the gap and mixes with the lubricating oil, forming sludge that is difficult to remove. The formation of sludge not only increases the resistance of the valve shaft rotation but also reduces the response speed and flexibility of the flap valve. Therefore, it is necessary to improve the existing technology to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a double-layer flap valve, aiming at solving the problem that in the existing technology, the bearing seat is arranged close to the box body, and dust in the box body directly enters the gap between the valve shaft and the bearing seat, increasing the rotation resistance of the valve shaft.

[0004] To achieve the above purpose, the utility model provides a double-layer flap valve, which includes a box body, an upper-layer flap valve assembly, and a lower-layer flap valve assembly; the box body is provided with a feeding part and a convex part; the upper end of the feeding part is provided with a feeding port, and the lower end of the feeding part is provided with a discharging port; the upper-layer flap valve assembly is arranged in the feeding part and close to the feeding port, and the lower-layer flap valve assembly is arranged in the feeding part and close to the discharging port;

[0005] Both the upper-layer flap valve assembly and the lower-layer flap valve assembly include a material guiding hopper, a flap, a valve shaft, a dust-proof component, and a bearing seat; the material guiding hopper is arranged in the feeding part, the valve shaft is rotatably connected to the convex part, and both ends of the valve shaft respectively pass through the dust-proof component and are connected to the bearing seat; the dust-proof component is arranged on both sides of the outer wall of the box body; support blocks are arranged on both sides of the outer wall of the box body, and the bearing seat is arranged on the support block and away from the dust-proof component; one end of the valve shaft far away from the box body is provided with a gravity component; the flap is circumferentially fixed on the valve shaft and can open and close the material guiding hopper;

[0006] The dust-proof component includes a dust-proof sleeve and a dust-proof cover; the dust-proof sleeve is arranged on the outer wall of the box body, the dust-proof cover is connected to the dust-proof sleeve by screws, and a dust collection cavity is formed between the dust-proof cover and the dust-proof sleeve.

[0007] Further, the box body is provided with a first shaft hole, the dust-proof sleeve is provided with a second shaft hole, the dust-proof cover is provided with a third shaft hole, the diameter of the second shaft hole is equal to or less than the diameter of the first shaft hole, and the diameter of the third shaft hole is less than the diameter of the second shaft hole.

[0008] Further, the valve shaft is provided with a connection platform, the flap is provided with a connection end, and the connection end is connected to the connection platform by screws.

[0009] Further, a dust shield is provided at the connection end. The dust shield and the connection end enclose a valve shaft accommodation cavity, and the valve shaft is arranged in the valve shaft accommodation cavity.

[0010] Further, a butt flanging is provided at the bottom of the material guiding conical hopper, and a sealing elastic layer is provided on the surface of the butt flanging that abuts against the flap.

[0011] Further, an elastic block is provided on the side of the flap away from the material guiding conical hopper.

[0012] Further, a vibration motor is also provided on the side of the flap away from the material guiding conical hopper.

[0013] Further, the box body is provided with a material guiding plate inclined towards the middle position and the material guiding plate is close to the discharge port.

[0014] Further, the gravity component includes a weight rod and a weight. The weight rod is arranged at one end of the valve shaft, and the weight is adjustably arranged on the weight rod through screws.

[0015] A double-layer flap valve provided by the present utility model, compared with the prior art, by arranging dust shielding components on both sides of the outer wall of the box body, the valve shaft passes through the dust shielding components and then is connected to the bearing seat. Dust enters the dust collection cavity from the gap between the dust shielding sleeve and the valve shaft inside the box body. The dust cover blocks most of the dust in the dust collection cavity, and only a very small part of the dust will flow out from the gap between the dust cover and the valve shaft. And the bearing seat is arranged away from the dust shielding components, so that the flowing dust cannot directly enter the gap between the valve shaft and the bearing seat, avoiding the accumulation of dust in the gap and the formation of sludge, enabling the valve shaft to rotate smoothly, and improving the response speed of the flap valve. Description of the Drawings

[0016] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 2 is the three-dimensional structure schematic diagram of the present utility model with part of the box body hidden;

[0018] Figure 3 is the cross-sectional view of the present utility model;

[0019] Figure 4 is Figure 3 the enlarged structure schematic diagram of part A in

[0020] Figure 5 is the three-dimensional structure schematic diagram of the dust shielding component;

[0021] Figure 6 is the cross-sectional view of the dust shielding component;

[0022] Figure 7 is the three-dimensional structure schematic diagram of the valve shaft.

[0023] Description of the reference numerals in the drawings:

[0024] 1. Box body; 11. Feeding part; 111. Feeding port; 112. Discharge port; 12. Protruding part; 13. Support block; 14. First shaft hole; 15. Guide plate;

[0025] 2. Upper flap valve assembly; 21. Guide cone hopper; 211. Abutting flange; 22. Flap; 221. Connection end; 222. Dust shield; 223. Valve shaft accommodation cavity; 224. Elastic block; 225. Vibration motor; 23. Valve shaft; 231. Connection platform; 24. Dust shielding assembly; 241. Dust shield sleeve; 2411. Second shaft hole; 242. Dust shield cover; 2421. Third shaft hole; 243. Dust collection cavity; 25. Bearing seat; 26. Gravity assembly; 261. Plumb bob rod; 262. Plumb bob;

[0026] 3. Lower flap valve assembly. Detailed implementation manners

[0027] The following describes the present utility model in detail with reference to specific embodiments.

[0028] In the present utility model, unless otherwise clearly defined and limited, when terms such as "arranged on", "connected", and "connected to" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. For the direction words in the present utility model, they are used to better illustrate the characteristics and the relationships between the characteristics. It should be understood that when the placement direction of the present utility model changes, the direction of the characteristics and the relationships between the characteristics also change accordingly. Therefore, the direction words do not constitute an absolute limiting effect on the characteristics and the relationships between the characteristics in space, but only play a relative limiting role.

[0029] The present utility model provides a double-layer flap valve, as Figures 1 to 7 shown, which includes a box body 1, an upper flap valve assembly 2, and a lower flap valve assembly 3; the box body 1 is provided with a feeding part 11 and a protruding part 12; the upper end of the feeding part 11 is provided with a feeding port 111, and the lower end of the feeding part 11 is provided with a discharge port 112; the upper flap valve assembly 2 is arranged in the feeding part 11 and close to the feeding port 111, and the lower flap valve assembly 3 is arranged in the feeding part 11 and close to the discharge port 112;

[0030] Both the upper flap valve assembly 2 and the lower flap valve assembly 3 include a material guiding hopper 21, a flap 22, a valve shaft 23, a dust blocking assembly 24, and a bearing seat 25; the material guiding hopper 21 is arranged at the material discharging part 11, the valve shaft 23 is rotatably connected to the protruding part 12, and both ends of the valve shaft 23 respectively pass through the dust blocking assembly 24 and are connected to the bearing seat 25; the dust blocking assembly 24 is arranged on both sides of the outer wall of the box body 1; support blocks 13 are arranged on both sides of the outer wall of the box body 1, and the bearing seat 25 is arranged on the support block 13 and away from the dust blocking assembly 24; one end of the valve shaft 23 away from the box body 1 is provided with a gravity assembly 26; the flap 22 is circumferentially fixed on the valve shaft 23 and can open and close the material guiding hopper 21;

[0031] The dust blocking assembly 24 includes a dust blocking sleeve 241 and a dust blocking cover 242; the dust blocking sleeve 241 is arranged on the outer wall of the box body 1, the dust blocking cover 242 is connected to the dust blocking sleeve 241 by screws, and a dust collecting cavity 243 is formed between the dust blocking cover 242 and the dust blocking sleeve 241.

[0032] Based on the above structural settings, by arranging the dust blocking assembly 24 on both sides of the outer wall of the box body 1, the valve shaft 23 passes through the dust blocking assembly 24 and then is connected to the bearing seat 25. Dust enters the dust collecting cavity 243 from the gap between the dust blocking sleeve 241 and the valve shaft 23 inside the box body 1. The dust blocking cover 242 blocks most of the dust in the dust collecting cavity 243, and only a very small amount of dust will flow out from the gap between the dust blocking cover 242 and the valve shaft 23. And the bearing seat 25 is arranged away from the dust blocking assembly 24, so the flowing-out dust cannot directly enter the gap between the valve shaft 23 and the bearing seat 25, avoiding the accumulation of dust in the gap between the valve shaft 23 and the bearing seat 25 and the formation of sludge, enabling the valve shaft 23 to rotate smoothly and improving the response speed of the flap valve. Of course, when too much dust accumulates in the dust collecting cavity 243, only need to loosen the screws to clean the dust collecting cavity 243, and the operation is simple and convenient.

[0033] In this embodiment, the box body 1 is provided with a first shaft hole 14, the dust blocking sleeve 241 is provided with a second shaft hole 2411, the dust blocking cover 242 is provided with a third shaft hole 2421, the diameter of the second shaft hole 2411 is equal to or smaller than the diameter of the first shaft hole 14, and the diameter of the third shaft hole 2421 is smaller than the diameter of the second shaft hole 2411. Through the above structural design, when dust comes out from inside the box body 1, since the diameter of the second shaft hole 2411 is equal to or smaller than the diameter of the first shaft hole 14, only a small amount of dust enters the gap between the dust blocking sleeve 241 and the valve shaft 23. These dust then comes to the dust collecting cavity 243. And since the diameter of the third shaft hole 2421 is smaller than the diameter of the second shaft hole 2411, most of the dust will be blocked in the dust collecting cavity 243, and only a very small amount of dust will flow out from the gap between the dust blocking sleeve 241 and the valve shaft 23, reducing the outflow of dust.

[0034] In this embodiment, the valve shaft 23 is provided with a connecting platform 231, and the flap 22 is provided with a connecting end 221. The connecting end 221 is connected to the connecting platform 231 by screws, so that the flap 22 is circumferentially connected to the valve shaft 23, that is, when the flap 22 rotates, the valve shaft 23 rotates together. When the flap 22 is damaged, it can be replaced simply by loosening the screws, which is simple and convenient to operate.

[0035] In this embodiment, the connecting end 221 is provided with a dust-proof plate 222. The dust-proof plate 222 and the connecting end 221 enclose a valve shaft accommodating cavity 223, and the valve shaft 23 is arranged in the valve shaft accommodating cavity 223. The dust-proof plate 222 effectively blocks the diffusion of dust from the bottom of the material guiding hopper 21 towards the valve shaft 23, thereby reducing the adhesion of dust, keeping the valve shaft 23 clean, and further reducing the dust entering the first shaft hole 14.

[0036] In this embodiment, the bottom of the material guiding hopper 21 is provided with an abutting flange 211, and a sealing elastic layer is arranged on the surface of the abutting flange 211 that abuts against the flap 22. When the flap 22 closes the material guiding hopper 21 under the action of the gravity assembly 26, when the flap 22 abuts against the abutting flange 211, the sealing elastic layer can play a buffering role to avoid direct collision between the flap 22 and the material guiding hopper 21. At the same time, under the action of its elasticity, the sealing elastic layer can play a sealing role when the flap 22 abuts against the abutting flange 211.

[0037] In this embodiment, an elastic block 224 is arranged on the surface of the flap 22 away from the material guiding hopper 21. When the flap 22 opens the material guiding hopper 21 under the action of the gravity of the material, if the flap 22 is pressed down and abuts against the inner wall of the box body 1, the elastic block 224 can play a buffering role.

[0038] In this embodiment, a vibration motor 225 is further arranged on the surface of the flap 22 away from the material guiding hopper 21. The flap 22 is vibrated by the vibration motor 225 to assist in discharging materials, so as to speed up the discharging operation of the materials by shaking.

[0039] In this embodiment, the box body 1 is provided with a material guiding plate 15 that inclines towards the middle position and the material guiding plate 15 is close to the discharge port 112. After the material falls from the flap 22 to the material guiding plate 15, the material is subjected to a good buffering effect, reducing the discharging speed and dust emission at the same time.

[0040] In this embodiment, the gravity assembly 26 includes a weight rod 261 and a weight 262. The weight rod 261 is arranged at one end of the valve shaft 23, and the weight 262 is adjustably arranged on the weight rod 261 by screws. By adjusting the position of the weight 262 on the weight rod 261 or changing the mass of the weight 262, the working pressure of the flap valve can be accurately adjusted to ensure the safe operation of the equipment within the set pressure range.

[0041] In summary, this kind of flap valve can solve the problem in the prior art that the bearing seat is arranged close to the box body, and dust in the blanking channel enters the gap between the valve shaft and the bearing seat, increasing the rotational resistance of the valve shaft.

[0042] In the case of no conflict, the above-mentioned embodiments and the features in the embodiments can be combined with each other.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A double-layer flap valve, comprising a housing (1), an upper flap valve assembly (2) and a lower flap valve assembly (3); the housing (1) is provided with a material discharge portion (11) and a protruding portion (12); the upper end of the material discharge portion (11) is provided with a material discharge port (111), and the lower end of the material discharge portion (11) is provided with a material discharge port (112); the upper flap valve assembly (2) is arranged on the material discharge portion (11) and close to the material discharge port (111), and the lower flap valve assembly (3) is arranged on the material discharge portion (11) and close to the material discharge port (112); the characteristics are: The upper flap valve assembly (2) and the lower flap valve assembly (3) both comprise a material guide cone hopper (21), a flap (22), a valve shaft (23), a dust shield assembly (24) and a bearing seat (25); the material guide cone hopper (21) is arranged on the material discharge portion (11), the valve shaft (23) is rotatably connected to the protruding portion (12), and both ends of the valve shaft (23) pass through the dust shield assembly (24) and are connected to the bearing seat (25); the dust shield assembly (24) is arranged on both sides of the outer wall of the box body (1); support blocks (13) are arranged on both sides of the outer wall of the box body (1), and the bearing seat (25) is arranged on the support blocks (13) and is away from the dust shield assembly (24); a gravity assembly (26) is arranged at one end of the valve shaft (23) away from the box body (1); the flap (22) is circumferentially fixed to the valve shaft (23) and is capable of opening and closing the material guide cone hopper (21); The dust shield assembly (24) comprises a dust shield sleeve (241) and a dust shield cover (242); the dust shield sleeve (241) is arranged on the outer wall of the box body (1), the dust shield cover (242) is connected to the dust shield sleeve (241) by screws, and the dust shield cover (242) and the dust shield sleeve (241) form a dust collecting cavity (243).

2. The double-layer flap valve according to claim 1, characterized in that: The box body (1) is provided with a first axial hole (14), the dust cover (241) is provided with a second axial hole (2411), and the dust cover (242) is provided with a third axial hole (2421); the diameter of the second axial hole (2411) is equal to or smaller than the diameter of the first axial hole (14), and the diameter of the third axial hole (2421) is smaller than the diameter of the second axial hole (2411).

3. The double-layer flap valve according to claim 1, characterized in that: The valve shaft (23) is provided with a connection platform (231), and the flap (22) is provided with a connection end (221), and the connection end (221) is connected to the connection platform (231) by means of screws.

4. The double-layer flap valve according to claim 3, characterized in that: The connecting end (221) is provided with a dust shield (222), the dust shield (222) and the connecting end (221) enclose a valve shaft accommodating chamber (223), and the valve shaft (23) is arranged in the valve shaft accommodating chamber (223).

5. The double-layer flap valve according to claim 1, characterized in that: The bottom of the material guiding cone hopper (21) is provided with an abutting flange (211), and a sealing elastic layer is provided on the side of the abutting flange (211) abutting against the flap (22).

6. The double-layer flap valve according to claim 1, characterized in that: An elastic block (224) is arranged on a side of the flap (22) away from the material guiding cone bucket (21).

7. The double-layer flap valve according to claim 1, characterized in that: A vibration motor (225) is also provided on a side of the flap (22) away from the material guiding cone bucket (21).

8. The double-layer flap valve according to claim 1, characterized in that: The box body (1) is provided with a material guide plate (15) inclined toward a middle position, and the material guide plate (15) is close to the material discharge port (112).

9. The double-layer flap valve according to claim 1, characterized in that: The gravity assembly (26) comprises a weight rod (261) and a weight (262). The weight rod (261) is arranged at one end of the valve shaft (23), and the weight (262) is adjustably arranged on the weight rod (261) by means of a screw.

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