Electric three-way valve applied to grain air cushion belt conveyor

Abstract

The utility model relates to an electric three-way valve applied to a grain air cushion belt conveyor, which is mounted on a blanking articulated chute of the air cushion belt conveyor and comprises an electric three-way valve body, an inclined feed port is formed in the top of the three-way valve pipe, and a vertical discharge port and an inclined discharge port are formed in the bottom of the three-way valve pipe; the valve plate assembly comprises a driving shaft and a valve plate, and the valve plate is fixed on the peripheral surface of the driving shaft; the power assembly comprises a driving frame, a rotary power mechanism, a chain wheel I, a chain wheel II and a chain; a dust removal pipe is welded and fixed to the dust removal opening, and a butt joint flange used for being connected with an external negative pressure pipeline is arranged on the edge of the top of the dust removal opening; the dust removal opening is formed in the top of the three-way valve pipe and connected with a negative pressure dust removal system, dust generated in the flow dividing process can be adsorbed in real time, environmental pollution is reduced, the environmental protection requirement of a modern grain depot is met, in addition, the dust removal opening is in flange connection, rapid butt joint with an external dust removal pipeline is facilitated, system compatibility is improved, and the three-way valve is more environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the technical field of pellet conveying equipment, specifically an electric three-way valve applied to a grain air cushion belt conveyor. Background Technology

[0002] In grain storage and transportation, air cushion belt conveyors are widely used due to their advantages such as high conveying efficiency, low energy consumption, and low dust pollution. However, in actual production, grain often needs to be diverted to different target locations, such as different warehouse numbers or conveying lines, through discharge chutes. Traditional diversion devices mostly use manual three-way valves or simple baffle structures, which have the following technical defects:

[0003] (1) Insufficient sealing: There is a gap between the valve plate and the pipe wall of the traditional three-way valve, which can lead to grain leakage or dust overflow, especially in the negative pressure conveying system, which will affect the overall dust removal effect.

[0004] (2) Low operating efficiency: Manual adjustment of the valve plate requires human intervention, which cannot achieve remote automated control and is difficult to adapt to the intelligent management needs of modern grain depots;

[0005] (3) Poor structural reliability: The valve plate is easily deformed or worn due to long-term impact from grain. It lacks reinforcement design and buffer pads, and is prone to collision noise and sealing failure when closed.

[0006] (4) Weak dust removal compatibility: The dust generated during the diversion process requires additional dust removal equipment. Traditional three-way valves do not integrate dust removal interfaces, resulting in incomplete dust control in the system.

[0007] To address the aforementioned issues, there is an urgent need for a three-way valve with high sealing performance, electric drive, and integrated dust removal function to meet the efficient, environmentally friendly, and automated diversion requirements of air cushion belt conveyors. Utility Model Content

[0008] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an electric three-way valve that adds an extra dust removal interface and can remove dust while feeding materials, which can be applied to a grain air cushion belt conveyor.

[0009] The technical problem to be solved by this utility model is achieved through the following technical solution: an electric three-way valve applied to a grain air cushion belt conveyor, which is installed on the discharge chute of the air cushion belt conveyor, and includes:

[0010] The three-way valve pipe has an inclined feed port at the top for connecting to the discharge chute of the air cushion belt conveyor, and a vertical discharge port and an inclined discharge port at the bottom.

[0011] A valve plate assembly includes a drive shaft and a valve plate, wherein the drive shaft is rotatably connected to a three-way valve pipe between a vertical feed port and an inclined feed port, and the valve plate is fixed on the outer peripheral surface of the drive shaft.

[0012] The power assembly includes a drive frame, a rotary power mechanism, sprocket I, sprocket II, and a chain. The drive frame is fixed to the outer wall of the three-way valve pipe below the inclined feed port. The rotary power mechanism is fixed to the drive frame. Sprocket I is fixed to the power output end of the rotary power mechanism. Both ends of the drive shaft extend outside the three-way valve pipe and are rotatably mounted on the three-way valve pipe through bearing seats. Sprocket II is fixed to the outer circumferential surface of the end of the drive shaft that extends outside the three-way valve pipe. The chain drive is connected to the outer circumferential surfaces of sprocket I and sprocket II.

[0013] The dust removal port is located at the top of the three-way valve pipe and directly above the vertical discharge port and the inclined discharge port. A dust removal pipe is welded and fixed to the dust removal port, and the top edge of the dust removal port has a docking flange for connecting to an external negative pressure pipeline.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the electric three-way valve applied to the grain air cushion belt conveyor described above has an upper flange on the edge of the inclined feed port of the three-way valve pipe for connecting with the discharge chute flange of the air cushion belt conveyor, and the edges of both the vertical discharge port and the inclined discharge port of the three-way valve pipe have lower flanges for connecting with external pipes.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the electric three-way valve applied to the grain air cushion belt conveyor described above, wherein the valve plate is composed of a valve plate frame and two valve plate reinforcing ribs, and the two valve plate reinforcing ribs are symmetrically bolted to both sides of the valve plate frame.

[0016] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the electric three-way valve applied to the grain air cushion belt conveyor described above has a rubber pad I fixed on the inner wall of the three-way valve pipe between the inclined feed port and the vertical discharge port for abutting against the front side wall of the valve plate, and a rubber pad II fixed on the inner wall of the three-way valve pipe between the inclined feed port and the inclined discharge port for abutting against the rear side wall of the valve plate.

[0017] Compared with the prior art, the beneficial technical effects of this utility model are:

[0018] (1) The valve plate assembly driven by the rotary power mechanism can realize the rapid switching between the vertical discharge port and the inclined discharge port, meet the multi-directional diversion requirements in the grain conveying process, and the rotary power mechanism adopts the sprocket and chain transmission mechanism, which has stable and reliable power transmission. Compared with the traditional manual switching of the discharge port, it improves the work efficiency and reduces the intensity of manual operation.

[0019] (2) Rubber pads I and II are installed between the valve plate and the inner wall of the three-way valve pipe. This design can effectively reduce grain leakage and dust spillage, ensure the airtightness of the conveying system, and the valve plate adopts a reinforced rib structure design to enhance rigidity and prevent deformation. After wear, the valve plate frame or the reinforcing rib can be replaced separately, and it can still maintain a good sealing effect after long-term use. In addition, when the valve plate is closed, it makes flexible contact with the rubber pad to reduce collision noise, reduce mechanical impact, and improve the stability of equipment operation.

[0020] (3) A dust removal port is set at the top of the three-way valve pipe and connected to a negative pressure dust removal system, which can adsorb the dust generated during the diversion process in real time, reduce environmental pollution, and meet the environmental protection requirements of modern grain depots. In addition, the dust removal port adopts a flange connection method, which facilitates quick docking with external dust removal pipes and improves system compatibility.

[0021] (4) The three-way valve pipe adopts a flange connection design, which facilitates quick installation and disassembly with the conveyor discharge chute and external pipelines, reducing maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model from a bottom view.

[0024] Reference numerals in the attached drawings: 1. Three-way valve pipe; 2. Inclined feed inlet; 3. Vertical discharge port; 4. Inclined discharge port; 5. Upper flange; 6. Lower flange; 7. Gasket I; 8. Gasket II; 9. Drive shaft; 10. Valve plate frame; 11. Valve plate reinforcing rib; 12. Drive frame; 13. Rotary power mechanism; 14. Sprocket I; 15. Sprocket II; 16. Chain; 17. Dust collection port; 18. Dust collection pipe; 19. Connecting flange. Detailed Implementation

[0025] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0026] Example 1, referring to Figure 1-2 An electric three-way valve for use on a grain air cushion belt conveyor, which is installed on the discharge chute of the air cushion belt conveyor, includes:

[0027] The three-way valve pipe 1 is formed into a roughly square box structure. Its top has an inclined feed port 2 for connecting to the discharge chute (not shown) of an air cushion belt conveyor (not shown). The angle between the inclined feed port 2 and the horizontal plane is between 35° and 45°. It is used to receive material from the discharge chute of the external air cushion belt conveyor. Its bottom has a vertical discharge port 3 and an inclined discharge port 4. The angle between the inclined discharge port 4 and the horizontal plane is between 40° and 50°. The edge of the inclined feed port 2 of the three-way valve pipe 1 has an upper flange 5 for connecting to the flange of the discharge chute of the air cushion belt conveyor. The edges of the vertical discharge port 3 and the inclined discharge port 4 of the three-way valve pipe 1 both have lower flanges 6 for connecting to external pipes. The edges of the upper flange 5 and the lower flange 6 both have several bolt holes.

[0028] To improve the sealing performance of the three-way valve pipe 1 after switching between the two feeding channels, a rubber pad I7 is fixedly installed on the inner wall of the three-way valve pipe 1 between the inclined feed port 2 and the vertical feed port 3 for abutting against the front side wall of the valve plate. The rubber pad I7 is a square rubber pad with a through hole for material discharge in the middle. A rubber pad II8 is fixedly installed on the inner wall of the three-way valve pipe 1 between the inclined feed port 2 and the inclined feed port 4 for abutting against the rear side wall of the valve plate. The rubber pad II8 is a square rubber pad with a through hole for material discharge in the middle. By adding rubber pads I7 and II8, the sealing performance during the feeding process can be guaranteed, and the mechanical impact force between the valve plate and the inner wall of the three-way valve pipe 1 can be buffered, thus extending the service life to a certain extent.

[0029] The valve plate assembly includes a drive shaft 9 and a valve plate. The drive shaft 9 is rotatably connected to a three-way valve pipe 1 between a vertical feed port 3 and an inclined feed port 4. The valve plate is fixed on the outer circumferential surface of the drive shaft 9. The valve plate consists of a valve plate frame 10 and two valve plate reinforcing ribs 11. The valve plate frame 10 is formed into a roughly square plate structure, and the valve plate reinforcing ribs 11 are formed into roughly square plate structures. The two valve plate reinforcing ribs 11 are symmetrically bolted to the two sides of the valve plate frame 10. This arrangement can strengthen the overall structural strength of the valve plate, enhance rigidity, prevent deformation, and allow the valve plate frame 10 or the valve plate reinforcing ribs 11 to be replaced separately after wear.

[0030] An external power assembly is also provided, comprising a drive frame 12, a rotary power mechanism 13, sprocket I 14, sprocket II 15, and a chain 16. The drive frame 12 is fixed to the outer wall of the three-way valve pipe 1 below the inclined feed port 2, and can be bolted to the outer wall of the three-way valve pipe 1. It is formed into a roughly square plate structure. The rotary power mechanism 13 is fixed to the drive frame 12. The rotary power mechanism 13 can be a servo motor, which can be started and stopped via an external power supply. The sprocket I 14 is fixed to the rotary power mechanism. On the power output end of the mechanism 13, both ends of the drive shaft 9 extend to the outside of the three-way valve pipe 1 and are rotatably mounted on the three-way valve pipe 1 through the bearing seat. The sprocket II 15 is fixed on the outer circumferential surface of the end of the drive shaft 9 that extends to the outside of the three-way valve pipe 1. The chain 16 is connected to the outer circumferential surface of the sprocket I 14 and the sprocket II 15. The power output end of the rotating power mechanism 13 drives the sprocket I 14 and the sprocket II 15 through the chain 16. In this way, the valve plate assembly selectively blocks the top of the vertical discharge port 3 or the inclined discharge port 4.

[0031] To minimize dust generation during the loading process, a dust removal port 17 is provided on the three-way valve pipe 1. The dust removal port 17 can be a square opening, located at the top of the three-way valve pipe 1 and directly above the vertical discharge port 3 and the inclined discharge port 4. This allows for dust removal from the area directly above the vertical discharge port 3 or the inclined discharge port 4 during the loading process. A dust removal pipe 18 is welded and fixed to the dust removal port. The top edge of the dust removal port has a connecting flange 19 for connecting to an external negative pressure pipeline. The dust removal pipe 18 can be connected to the external negative pressure dust collection pipeline through the connecting flange 19 to perform dust removal operations, making the entire loading operation more environmentally friendly.

[0032] In Example 1, the electric three-way valve applied to the grain air cushion belt conveyor is first bolted to the discharge chute of the air cushion belt conveyor via the upper flange 5 at the top of the three-way valve pipe 1. Simultaneously, the vertical discharge port 3 and the inclined discharge port 4 at the bottom are connected to their respective external conveying pipes via the lower flange 6, ensuring the entire three-way valve is securely installed. When the conveying system is started, grain material enters the three-way valve pipe 1 from the discharge chute of the air cushion belt conveyor through the inclined inlet 2. At this time, the operator can start the rotating power mechanism 13 via an external power source. The motor's power output drives the sprocket I 14 to rotate. The chain 16 drives the sprocket II 15 to rotate, which in turn causes the drive shaft 9 to drive the valve plate to swing inside the three-way valve pipe 1. When it is necessary to guide the material to the vertical discharge port 3, the valve plate rotates to fit tightly with the rubber pad II 8, blocking the upper channel of the inclined discharge port 4, and the material is discharged from the vertical discharge port 3. Conversely, when it is necessary to switch to the inclined discharge port 4, the valve plate rotates to fit tightly with the rubber pad I 7, blocking the vertical discharge port 3, and the material is discharged from the inclined discharge port 4. In this process, the rubber pads I 7 and II 8 not only ensure the sealing between the valve plate and the pipe wall to prevent material leakage, but also reduce the mechanical impact and noise when the valve plate is switched through rubber buffering.

[0033] Meanwhile, the dust generated during the material diversion process will naturally rise to the top of the three-way valve pipe 1 and be sucked by the external negative pressure dust removal system through the dust removal port located directly above the vertical discharge port 3 and the inclined discharge port 4. The dust removal port is connected to the external negative pressure pipeline through the docking flange 19 to form a continuous dust removal airflow, effectively collecting dust and keeping the working environment clean. If the valve plate or gasket is worn due to long-term use, the valve plate frame 10 or the reinforcing rib plate can be disassembled and replaced separately without disassembling the three-way valve as a whole, which greatly reduces maintenance costs and meets the needs of modern grain depot automation and environmental protection.

Claims

1. An electric three-way valve for use on a grain air cushion belt conveyor, which is installed on the discharge chute of the air cushion belt conveyor, characterized in that: It includes; The three-way valve pipe has an inclined feed port at the top for connecting to the discharge chute of the air cushion belt conveyor, and a vertical discharge port and an inclined discharge port at the bottom. A valve plate assembly includes a drive shaft and a valve plate, wherein the drive shaft is rotatably connected to a three-way valve pipe between a vertical feed port and an inclined feed port, and the valve plate is fixed on the outer peripheral surface of the drive shaft. The power assembly includes a drive frame, a rotary power mechanism, sprocket I, sprocket II, and a chain. The drive frame is fixed to the outer wall of the three-way valve pipe below the inclined feed port. The rotary power mechanism is fixed to the drive frame. Sprocket I is fixed to the power output end of the rotary power mechanism. Both ends of the drive shaft extend outside the three-way valve pipe and are rotatably mounted on the three-way valve pipe through bearing seats. Sprocket II is fixed to the outer circumferential surface of the end of the drive shaft that extends outside the three-way valve pipe. The chain drive is connected to the outer circumferential surfaces of sprocket I and sprocket II. The dust removal port is located at the top of the three-way valve pipe and directly above the vertical discharge port and the inclined discharge port. A dust removal pipe is welded and fixed to the dust removal port, and the top edge of the dust removal port has a docking flange for connecting to an external negative pressure pipeline.

2. The electric three-way valve applied to a grain air cushion belt conveyor according to claim 1, characterized in that: The edge of the inclined feed port of the three-way valve pipe has an upper flange for connecting to the discharge chute flange of the air cushion belt conveyor, and the edges of both the vertical discharge port and the inclined discharge port of the three-way valve pipe have lower flanges for connecting to external pipelines.

3. The electric three-way valve applied to a grain air cushion belt conveyor according to claim 1, characterized in that: The valve plate consists of a valve plate frame and two valve plate reinforcing ribs, with the two valve plate reinforcing ribs symmetrically bolted to both sides of the valve plate frame.

4. The electric three-way valve applied to a grain air cushion belt conveyor according to claim 1, characterized in that: A rubber pad I is fixed on the inner wall of the three-way valve pipe between the inclined feed port and the vertical discharge port, for abutting against the front side wall of the valve plate. A rubber pad II is fixed on the inner wall of the three-way valve pipe between the inclined feed port and the inclined discharge port, for abutting against the rear side wall of the valve plate.

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