External anti-blocking discharge valve

Abstract

The utility model belongs to the technical field of discharging valves, and particularly relates to an external anti-blocking discharging valve which comprises a valve body, an impeller assembly and an anti-blocking nozzle, the anti-blocking nozzle is used for preventing materials entering from a feeding port from directly falling between the edge portion of a blade and the cavity wall of a valve cavity, one end of the anti-blocking nozzle and the valve body are fixed to be a fixed end, and the other end of the anti-blocking nozzle is a suspended end. The upper surface of the supporting rod gradually inclines downwards from the fixed end to the suspension end, and the sectional area of the supporting rod gradually decreases from the fixed end to the suspension end; materials entering from the feeding port are prevented from directly falling between the edges of the blades and the cavity wall of the valve cavity through the anti-clamping nozzle arranged on the feeding port, the blades are prevented from being clamped, the materials falling on the upper surfaces can be guided out through the obliquely-arranged upper surfaces, the gap positions can be tightly blocked through the large-area fixing ends, the materials are prevented from entering the valve cavity, and the service life of the valve cavity is prolonged. Meanwhile, the connecting strength between the anti-blocking nozzle and the valve body is improved, then the sectional area of the anti-blocking nozzle is gradually reduced, the auxiliary material blocking effect is still achieved, materials can be saved, and the weight can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of unloading valve technology, specifically relating to an external anti-jamming unloading valve. Background Technology

[0002] A discharge valve generally includes a valve body and an impeller assembly with transmission inside the valve body. The material enters between two blades through the inlet and is discharged from the outlet along with the blades during the rotation of the blades, thus achieving smooth discharge.

[0003] Figure 1 This is a schematic diagram of the structure of a discharge valve in the prior art. After the material enters the valve cavity from the feed port, most of the material either falls between two adjacent blades, and a small part of the material will fall directly into the gap between the blade and the valve cavity wall (i.e., part A), causing the blade to get stuck. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem in the prior art that after the material enters the valve cavity from the feed port, a small part of the material will fall directly into the gap between the blade and the valve cavity wall, causing the blade to get stuck, an external anti-jamming unloading valve is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an external anti-jamming unloading valve, comprising:

[0006] The valve body has a valve cavity, an inlet and an outlet communicating with the valve cavity;

[0007] An impeller assembly, which is rotatably disposed within the valve chamber, includes an impeller shaft and a plurality of blades fixed on the impeller shaft, wherein one end of the blades fixed to the impeller shaft is its root and the other end is its edge;

[0008] The anti-jamming nozzle is installed at the feed inlet and is used to prevent material entering from the feed inlet from falling directly between the blade edge and the valve cavity wall. One end of the anti-jamming nozzle is fixed to the valve body as a fixed end, and the other end is a suspended end. Its upper surface gradually slopes downward from the fixed end to the suspended end, and its cross-sectional area gradually decreases from the fixed end to the suspended end.

[0009] Furthermore, the anti-jamming nozzle is bent in the middle to form two downward-extending wings, which gradually move away from each other from top to bottom.

[0010] Furthermore, the number of anti-jamming nozzles is at least one, which is located downstream of the feed inlet along the rotation direction of the impeller assembly.

[0011] Furthermore, a baffle is fixed between two adjacent blades.

[0012] Furthermore, the lower surface of the anti-jamming nozzle is an arc surface that matches the rotation trajectory of the blade.

[0013] Furthermore, each blade is inclined along the axial direction, and each baffle is also inclined along the axial direction.

[0014] Furthermore, the connection between the two wings features a rounded transition.

[0015] Furthermore, the cross-sectional area of ​​the blade edge gradually decreases.

[0016] The beneficial effects of this utility model are as follows: This utility model uses an anti-jamming nozzle installed at the feed inlet to prevent material entering from the feed inlet from falling directly between the blade edge and the valve cavity wall, thus avoiding blade jamming. The inclined upper surface can discharge the material that falls on it, and the large fixed end can tightly block the gap to prevent material from entering. At the same time, it increases the installation area between it and the valve body, improving the connection strength between the two. Then, the cross-sectional area of ​​the anti-jamming nozzle gradually decreases, still playing an auxiliary role in blocking material, while saving materials and reducing weight.

[0017] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural diagram of existing technology;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 yes Figure 3 Cross-sectional view along the BB direction;

[0023] Figure 5 This is a schematic diagram of the anti-jamming nozzle structure in this utility model;

[0024] In the picture:

[0025] 1. Valve body; 101. Valve chamber; 102. Inlet; 103. Outlet;

[0026] 2. Impeller assembly; 201. Impeller shaft; 202. Blade; 2021. Root; 2022. Edge; 203. Baffle; 204. Receiving cavity;

[0027] 3. Anti-jamming nozzle; 301. Fixed end; 302. Suspension end; 303. Wing; 304. Curved surface. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0029] like Figures 2-5 As shown, an external anti-jamming unloading valve includes a valve body 1, which has a valve cavity 101, an inlet 102 and an outlet 103 communicating with the valve cavity 101. The inlet 102 and the outlet 103 are located at both ends of the valve cavity 101, and the cross-sectional area of ​​both is smaller than that of the valve cavity 101.

[0030] Impeller assembly 2, which is rotatably disposed in the valve cavity 101, includes an impeller shaft 201 and a plurality of blades 202 fixed on the impeller shaft 201. The plurality of blades 202 are distributed circumferentially along the impeller shaft 201, and one end of the blade 202 fixed to the impeller shaft 201 is its root 2021, and the other end is its edge 2022. The edge 2022 is in contact with the cavity wall of the valve cavity 101.

[0031] And the anti-jamming nozzle 3 is set in the feed inlet 102 and is used to block the material entering from the feed inlet 102 from falling directly into the space between the edge 2022 of the blade 202 and the wall of the valve chamber 101. As the impeller assembly 2 rotates continuously, the blade 202 on it can gradually move closer to or away from the feed inlet 102. As it moves away from the feed inlet 102 and gradually moves closer to the wall of the valve chamber 101, the gap between the two gradually decreases. If the material falls into this gap, it will cause the blade 202 to jam. The anti-jamming nozzle 3 can block the gap and prevent the material from entering to prevent jamming.

[0032] One end of the anti-jamming nozzle 3 is fixed to the valve body 1 as a fixed end 301, and the other end is a suspended end 302. Its upper surface gradually slopes downward from the fixed end 301 to the suspended end 302, thereby guiding the material falling on it out and preventing the material from accumulating on it and affecting its installation strength. The cross-sectional area of ​​the anti-jamming nozzle 3 gradually decreases from the fixed end 301 to the suspended end 302. The gap is located near the fixed end 301. The large area of ​​the fixed end 301 can tightly block this part to prevent the material from entering. At the same time, the large area of ​​the fixed end 301 increases the installation area between it and the valve body 1, thereby improving the connection strength between the two. Then, the cross-sectional area of ​​the anti-jamming nozzle 3 gradually decreases, still playing an auxiliary role in blocking the material, while saving materials and reducing weight.

[0033] In some examples, the anti-jamming nozzle 3 is bent in the middle to form two downward-extending wings 303, which are roughly in the shape of a "bird's beak". Each wing 303 is roughly triangular, and its cross-sectional area gradually decreases from the fixed end 301 to the suspended end 302. The two wings 303 gradually move away from top to bottom to play a guiding role. After the material falls from the feed port 102 onto the anti-jamming nozzle 3, the two wings 303 guide the material to both sides to prevent the material from entering the gap.

[0034] In some examples, the number of anti-jamming nozzles 3 is at least one, which is located downstream of the feed inlet 102 along the rotation direction of the impeller assembly 2. Of course, there can also be two, which can be symmetrically distributed on both sides of the feed inlet 102. They can block the material when the blade 202 gradually approaches the wall of the valve chamber 101 and when the blade 202 gradually moves away from the wall of the valve chamber 101. The anti-jamming nozzles 3 are located in the middle of the impeller assembly 2 along its axis, so that the material falling on it can be evenly guided to both sides.

[0035] In some examples, a baffle 203 is fixed between two adjacent blades 202. The baffle 203 and the blades 202 on both sides of it form a receiving cavity 204 for receiving materials. After the material enters the valve cavity 101 from the feed port 102, most of the material falls into the receiving cavity 204 and rotates synchronously with the blades 202.

[0036] In some examples, the lower surface of the anti-jamming nozzle 3 is an arc surface 304 that matches the rotation trajectory of the blade 202, thereby avoiding interference with the continuously rotating blade 202 and preventing material from entering the gap between the blade 202 and the anti-jamming nozzle 3.

[0037] In some examples, each blade 202 is inclined along the axial direction, and each baffle 203 is also inclined along the axial direction. That is, the blade 202 is not parallel to the axis of the impeller assembly 2. The inclined blade 202 makes the receiving cavity 204 also inclined. The material in the inclined receiving cavity 204 itself has the tendency to flow along the inclined direction, thereby avoiding the unloading failure caused by the material being compacted and unable to flow.

[0038] In some examples, the connection between the two wings 303 is rounded to avoid stress concentration, thereby improving the structural strength of the anti-jamming nozzle 3.

[0039] In some examples, the cross-sectional area of ​​the edge 2022 of the blade 202 gradually decreases to reduce its contact area with the wall of the valve cavity 101 and reduce the probability of jamming. At the same time, the tip of the edge 2022 still has a certain thickness, rather than a sharp corner shape, to ensure that it has a certain structural strength.

[0040] Working principle:

[0041] After the material enters the valve chamber 101 through the feed inlet 102, most of the material falls into the receiving cavity 204 formed by the baffle 203 and its two adjacent blades 202. It then rotates with the blades 202 to the discharge outlet 103. The anti-jamming nozzle 3, located above the gap formed between the edge 2022 of the blades 202 and the wall of the valve chamber 101, blocks a small portion of the material from falling into the gap. The two wings 303 of the anti-jamming nozzle 3 guide the material falling on them to both sides. The upper surface of the anti-jamming nozzle 3 extends from the fixed end 301 to the suspended end 301. The direction of 02 gradually tilts downwards to guide the material falling on it, preventing the material from accumulating on it and affecting its installation strength. The cross-sectional area of ​​the anti-jamming nozzle 3 gradually decreases from the fixed end 301 to the suspended end 302. The large area of ​​the fixed end 301 can tightly block this part to prevent material from entering. At the same time, the large area of ​​the fixed end 301 increases the installation area between it and the valve body 1, thereby improving the connection strength between the two. Then, the cross-sectional area of ​​the anti-jamming nozzle 3 gradually decreases, still playing an auxiliary role in blocking material, while saving materials and reducing weight.

[0042] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. An external anti-jamming unloading valve, characterized in that: include: The valve body (1) has a valve cavity (101), an inlet (102) communicating with the valve cavity (101), and an outlet (103); The impeller assembly (2) is rotatably disposed in the valve chamber (101), including an impeller shaft (201) and a plurality of blades (202) fixed on the impeller shaft (201), wherein one end of the blade (202) is fixed to the impeller shaft (201) as its root (2021) and the other end as its edge (2022); And an anti-jamming nozzle (3), which is set at the feed inlet (102) and is used to prevent the material entering from the feed inlet (102) from falling directly into the edge (2022) of the blade (202) and the wall of the valve cavity (101). One end of the anti-jamming nozzle (3) is fixed to the valve body (1) as a fixed end (301), and the other end is a suspended end (302). Its upper surface gradually slopes downward from the fixed end (301) to the suspended end (302), and the cross-sectional area gradually decreases from the fixed end (301) to the suspended end (302).

2. The anti-jamming unloading valve according to claim 1, characterized in that: The anti-jamming nozzle (3) is bent in the middle to form two downward-extending wings (303), which gradually move away from each other from top to bottom.

3. The anti-jamming unloading valve according to claim 1, characterized in that: The number of anti-jamming nozzles (3) is at least one, which is located downstream of the feed inlet (102) along the rotation direction of the impeller assembly (2).

4. The anti-jamming unloading valve according to claim 1, characterized in that: A baffle (203) is fixed between two adjacent blades (202).

5. The anti-jamming unloading valve according to claim 1, characterized in that: The lower surface of the anti-jamming nozzle (3) is an arc surface (304) that matches the rotation trajectory of the blade (202).

6. The anti-jamming unloading valve according to claim 4, characterized in that: Each blade (202) is inclined along the axial direction, and each baffle (203) is also inclined along the axial direction.

7. The anti-jamming unloading valve according to claim 2, characterized in that: The connection between the two wings (303) is a rounded transition.

8. The anti-jamming unloading valve according to claim 1, characterized in that: The cross-sectional area of ​​the blade (2022) edge gradually decreases.

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