Negative-pressure pneumatic feeding equipment for premix

Abstract

The utility model discloses a premix negative pressure pneumatic feeding device which comprises a conveying pipeline and a material-gas separator connected with the conveying pipeline, the lower portion of the material-gas separator is connected with a plurality of material receiving bins corresponding to a plurality of discharging hoppers through a plurality of discharging hoppers, the material-gas separator is connected with a Roots blower through an air exhaust pipeline, and the Roots blower is connected with the conveying pipeline. The conveying pipeline is connected with a feeding hose, the end, away from the conveying pipeline, of the feeding hose is connected with a feeding pipe, the feeding pipe is rotationally connected to a moving trolley walking on the ground, and the feeding pipe comprises a feeding end and a filter screen located in an inner cavity of the feeding end. The feeding device solves the dust raising problem in a traditional feeding mode, improves the environmental protection property of an operation site, can carry out feeding operation of premix in a multi-azimuth and large-area mode, improves the flexibility and the adaptability of equipment, can prevent chippings from entering a pipeline and flowing at a high speed to abrade the pipeline, and improves the safety of the premix conveying process.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding equipment, in particular to a premix negative pressure pneumatic feeding equipment. Background Art

[0002] In today's iron and steel metallurgical industry, with the increasing awareness of environmental protection and the continuous pursuit of efficiency in industrial production, how to ensure the cleanliness of the production environment and the health of workers while maintaining efficient production has become an important issue facing the manufacturing industry. In the pelletizing operation area, there are many traditional ways to feed premixes. The transportation of such dusty materials can be mainly divided into: belt conveyor, screw ash conveyor, tube chain conveyor and pneumatic conveying. Among them, the belt conveyor method has problems such as large floor space and high dust at the feeding point; the screw ash conveyor and tube chain conveyor methods are both pipeline conveying methods. Although the dust transportation is better controlled, the loading still requires a loader or grab bucket for loading, and there is still a problem of high dust. Therefore, the use of a pneumatic conveying system to transport powdered premixes is an important feeding method.

[0003] Currently, the most common pneumatic conveying system is positive pressure conveying. Positive pressure conveying involves placing materials in a material buffer bin in advance. The material buffer bin has an air inlet and an air outlet. When the materials enter the material buffer bin, air is blown in through the air inlet, and the materials are conveyed out through the air outlet. However, positive pressure conveying requires that the materials must first be conveyed to the material buffer bin. When the materials are loaded into the material buffer bin, a large amount of dust will still be generated, polluting the on-site environment, and its environmental protection effect is poor. On the other hand, during the feeding process, due to positive pressure conveying, the inlet air pressure in the material buffer bin is relatively high. The iron filings, iron oxide scale and other debris contained in the premix can easily cause wear on the pipeline when flowing with the high-speed airflow in the pipeline, posing certain safety risks in the conveying process. Utility Model Content

[0004] In order to solve the technical problems in the existing technology that positive pressure conveying will generate a lot of dust, the environmental protection effect is poor, the air inlet pressure in the material buffer bin is relatively high, the debris such as iron filings and iron oxide contained in the premix easily cause wear on the pipeline, and there are safety hazards in the conveying process, the utility model provides the following technical solutions.

[0005] The utility model discloses a premix negative pressure pneumatic feeding device, comprising a conveying pipeline and a material-gas separator connected to the conveying pipeline, the lower part of the material-gas separator is connected to a plurality of material receiving bins corresponding to the discharge hoppers through a plurality of discharge hoppers, the material-gas separator is connected to a Roots blower through an exhaust pipeline, the conveying pipeline is connected to a feed hose, the end of the feed hose away from the conveying pipeline is connected to a feeding pipe, the feeding pipe is rotatably connected to a mobile trolley walking on the ground, and the feeding pipe comprises a feeding end and a filter screen located in the inner cavity of the feeding end.

[0006] As a further technical solution, a side of the feed end away from the feed hose is provided with a plurality of insert plates spaced apart along the circumferential direction of the feed end.

[0007] As a further technical solution, a mounting portion with an internal thread on the inner wall is provided on one side of the feed end close to the feed hose, and the feeding pipe is provided with an external thread end matching the mounting portion.

[0008] As a further technical solution, the mobile trolley is provided with a universal wheel at the bottom and two fixed plates arranged opposite to each other at the top. Both of the fixed plates are rotatably connected to a rotating shaft, and the rotating shaft is connected to the feeding pipe through a fixing ring.

[0009] As a further technical solution, a handwheel is provided at at least one end of the rotating shaft.

[0010] As a further technical solution, the inner wall of the feed hose is provided with a steel wire.

[0011] The beneficial effects of the present invention are as follows: the premix negative pressure pneumatic feeding equipment of the present invention generates negative pressure power through a Roots blower, and adopts a tail suction method for conveying. The pressure in the conveying pipeline is lower than atmospheric pressure, and the feed can be self-priming. The premix is ​​fully mixed with air in the conveying pipeline and then conveyed to the material-gas separator. The premix falls to the bottom of the bin and is continuously transferred to the receiving bin below by the air-locking rotary valve, which solves the dust problem in the traditional feeding method and improves the environmental protection of the work site. The feeding hose is connected to a feeding pipe connected to the mobile trolley. The feeding hose moves with the movement of the feeding pipe and the mobile trolley, and the premix feeding operation can be carried out in multiple directions and over a large area, which improves the flexibility and adaptability of the equipment. The feeding pipe is detachably connected to the feeding end, and the feeding end is provided with an insertion plate and a filter screen, which facilitates the insertion of the feeding end into the bulk pile for suction operation. The debris such as iron filings or iron oxide in the bulk pile is blocked by the filter screen, preventing the debris from entering the pipeline and flowing at high speed to cause wear on the pipeline, thereby improving the safety of the premix conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the premix negative pressure pneumatic feeding equipment of the utility model;

[0013] Figure 2 This is a schematic diagram of the mobile trolley of the premix negative pressure pneumatic feeding equipment of the utility model;

[0014] Figure 3 This is a schematic diagram of the connection of the feeding pipe of the premix negative pressure pneumatic feeding equipment of the utility model;

[0015] In the figure: 1-mobile trolley; 101-fixed plate; 102-rotating shaft; 103-handwheel; 104-fixing ring; 2-feeding pipe; 201-feeding end; 202-filter screen; 203-insertion plate; 204-external thread end; 205-installation part; 3-feeding hose; 4-delivery pipeline; 5-material-gas separator; 501-discharge hopper; 6-exhaust pipeline; 7-Roots blower; 8-collecting bin. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0017] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc. are used solely for descriptive purposes and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features referred to. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0018] like Figure 1 As shown, the utility model is a premix negative pressure pneumatic feeding equipment, including a conveying pipe 4 and a material-gas separator 5 connected to the conveying pipe 4, the material-gas separator 5 is connected to a Roots blower 7 through an exhaust pipe 6, and a bag dust collector and several discharge hoppers 501 are provided at the lower part of the material-gas separator 5, and several receiving bins 8 are correspondingly arranged below the discharge hopper 501, and each discharge hopper 501 corresponds to a receiving bin.

[0019] In a preferred embodiment, two discharge hoppers and two air-locking rotary valves are provided below the material-gas separator 5. The feeding capacity of each air-locking rotary valve is 50t / h. Under normal operation, one discharge hopper 501 discharges the material into the receiving bin 8. Of course, it is not ruled out that the two discharge hoppers 501 discharge the material at the same time. The present utility model does not specifically limit this. The premix is ​​fully mixed with the air in the conveying pipe 4 and then conveyed to the material-gas separator 5. After the premix falls to the bottom of the bin of the material-gas separator 5, the air-locking rotary valve continuously transfers the material to the receiving bin 8 below. The dust-laden gas in the material-gas separator 5 is filtered by the bag dust collector and then sucked into the Roots blower 7 for discharge. The dust adsorbed to the bag returns to the bottom of the bin after pulse shock and is transferred into the receiving bin 8 by the rotary valve.

[0020] like Figure 2 and Figure 3 As shown, in a preferred embodiment, a delivery pipe 4 is fixed to a bracket of a certain height. One end of the delivery pipe 4 is connected to a feed hose 3 via a flange. The inner wall of the feed hose 3 is surrounded by a steel wire to increase its wear resistance. The end of the feed hose 3 away from the delivery pipe 4 is connected to a loading pipe 2. The loading pipe 2 is used to automatically draw in the premix under the action of negative pressure. The loading pipe 2 is rotatably connected to a mobile cart 1 that travels on the ground. The mobile cart 1 has universal wheels at its bottom, allowing workers to push it to move freely in various directions on the ground to suck in multiple bulk material piles on the ground.

[0021] In a preferred embodiment, the feed tube 2 includes a feed end 201 and a filter 202 located within the inner cavity of the feed end 201. The filter 202 allows the premix to pass through while preventing debris such as iron filings and iron oxide scale from entering the feed tube 2, thereby preventing wear and tear on the feed hose 3 and the conveying pipe 4. A plurality of insert plates 203 are provided on the side of the feed end 201 away from the feed hose 3, spaced apart along the circumference of the feed end 201. The insert plates 203 are integrally formed with the feed end 201, facilitating insertion of the feed end 201 into the bulk material pile. Once debris is blocked by the filter 202, it can be easily removed and discarded by workers.

[0022] In a preferred embodiment, a mounting portion 205 is provided on one side of the feed end 201 close to the feed hose 3, and an inner wall of the mounting portion 205 is provided with an internal thread. An end of the feeding pipe 2 close to the feed end 201 is provided with an external threaded end 204 matching the mounting portion 205, so that the feed end 201 can be threadedly connected to the feeding pipe 2. When the filter screen 202 is worn, the new feed end 201 and the filter screen 202 can be replaced in time.

[0023] In a preferred embodiment, two opposing fixed plates 101 are provided on the top of the mobile cart 1. Both fixed plates 101 are rotatably connected to a rotating shaft 102. The rotating shaft 102 is connected to the feeding tube 2 via a fixing ring 104. A handwheel 103 is provided at at least one end of the rotating shaft 102. A worker can operate the handwheel 103 to rotate the feeding tube 2 relative to the rotating shaft 102, facilitating the upward and downward movement of the feeding end 201 to suck the bulk material from the pile.

[0024] When using the present invention, the mobile trolley 1 is pushed close to a bulk material pile formed by accumulation of premixed materials, and the Roots blower 7 and the material-air separator 5 are activated. The hand wheel 103 is operated to insert the feed end 201 into the bulk material pile. The premixed materials pass through the filter 202 and enter the feeding pipe 2, the feeding hose 3, and the conveying pipe 4. The premixed materials are fully mixed with air in the conveying pipe 4 and then conveyed to the material-air separator 5. The premixed materials fall to the bottom of the silo and are continuously transferred to the receiving silo 8 below by the air-locking rotary valve. After loading one bulk material pile, the mobile trolley 1 is pushed to insert the feed end 201 into another bulk material pile for material suction. If the filter 202 is clogged with debris, the debris is thrown out through the gap in the insertion plate 203, or a new feed end 201 is replaced.

[0025] The preferred specific implementation methods and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above implementation methods and embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments that fall within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A premix negative pressure pneumatic feeding device, comprising a conveying pipe (4) and a material-gas separator (5) connected to the conveying pipe (4), wherein the lower portion of the material-gas separator (5) is connected to a plurality of material receiving bins (8) corresponding to the discharge hoppers (501) through a plurality of discharge hoppers (501), characterized in that: The material-gas separator (5) is connected to a Roots blower (7) via an exhaust pipe (6), the delivery pipe (4) is connected to a feed hose (3), and the end of the feed hose (3) away from the delivery pipe (4) is connected to a feeding pipe (2), the feeding pipe (2) is rotatably connected to a mobile trolley (1) walking on the ground, and the feeding pipe (2) includes a feeding end (201) and a filter screen (202) located in the inner cavity of the feeding end (201).

2. The premix negative pressure pneumatic feeding equipment according to claim 1, characterized in that: A plurality of insert plates (203) spaced apart along the circumferential direction of the feed end (201) are provided on a side of the feed end (201) away from the feed hose (3).

3. The premix negative pressure pneumatic feeding equipment according to claim 1, characterized in that: The feeding end (201) is provided with a mounting portion (205) having an internal thread on its inner wall on one side close to the feeding hose (3), and the feeding pipe (2) is provided with an external thread end (204) matching the mounting portion (205).

4. The premix negative pressure pneumatic feeding equipment according to claim 1, characterized in that: The movable trolley (1) is provided with a universal wheel at the bottom and two fixed plates (101) arranged opposite to each other at the top. The two fixed plates (101) are rotatably connected to a rotating shaft (102), and the rotating shaft (102) is connected to the feeding tube (2) via a fixing ring (104).

5. The premix negative pressure pneumatic feeding equipment according to claim 4, characterized in that: At least one end of the rotating shaft (102) is provided with a hand wheel (103).

6. The premix negative pressure pneumatic feeding equipment according to claim 1, characterized in that: The inner wall of the feed hose (3) is provided with a steel wire.

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