Pneumatic conveying device for powder raw materials

Abstract

The utility model discloses a pneumatic conveying device for powder raw materials, and relates to the technical field of powder conveying. The pneumatic feeding device structurally comprises a feeding hopper, a pneumatic butterfly valve, a pneumatic feeding bin, a preparation conveying pipe and a feeding pipeline. The feeding hopper, the pneumatic butterfly valve and the pneumatic feeding bin are sequentially connected from top to bottom. The preparation conveying pipe is fixedly communicated with the lower end of the pneumatic feeding bin; and the feeding pipeline is mounted at the output end of the feeding pipeline. According to the utility model, the powder is pre-conveyed into the circular pipe butted with the feeding pipeline through the preparation conveying pipe, so that the time for starting to output the powder in the pneumatic feeding bin is effectively shortened under high airflow, and the conveying efficiency of the whole system is improved; the powder in the round pipe forms airtightness at the conveying front end, effective utilization of gas in the gas storage tank is improved, and energy waste is reduced. The two air storage tanks can be used alternately, the conveying frequency of pneumatic conveying of powder raw materials is increased, and the requirement for mixed and alternate conveying of various additives is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder conveying, in particular to a pneumatic conveying device for powder raw materials. Background Art

[0002] In modern industrial production, the transportation of powder raw materials is an important link, especially in the processing of feed and feed additives, chemical industry, food and other industries. The traditional way of conveying powder raw materials mainly relies on mechanical conveying, such as screw conveying, belt conveying, etc. These methods have problems such as low efficiency, easy to generate dust, and difficult maintenance. In order to solve these problems, pneumatic conveying devices came into being.

[0003] Pneumatic conveying devices are devices that use gas power to transport powdered raw materials from one place to another. They have the advantages of high conveying efficiency, no pollution, and long-distance conveying. However, existing pneumatic conveying devices also have some problems during use, such as low conveying efficiency, low energy utilization, and conveying frequency that cannot meet the mixed and alternating conveying requirements of multiple additives.

[0004] Therefore, a new type of pneumatic conveying device for powder raw materials is developed to improve the conveying efficiency, increase the conveying frequency of pneumatic conveying of powder raw materials, meet the needs of mixed and alternating conveying of multiple additives, and achieve cleaning and maintenance-free. Utility Model Content

[0005] The purpose of the utility model is to provide a pneumatic conveying device for powder raw materials, which improves the conveying frequency of pneumatic conveying of powder raw materials through the combination of a feed hopper, a pneumatic butterfly valve, a pneumatic feeding bin, a preliminary conveying pipe, a feeding pipeline and two air storage tanks, meets the mixed and alternating conveying needs of multiple additives, and realizes cleaning and maintenance-free.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a pneumatic conveying device for powder raw materials, comprising a feed hopper, a pneumatic butterfly valve, a pneumatic feeding bin, a pre-conveying pipe and a feeding pipeline; the feed hopper, the pneumatic butterfly valve and the pneumatic feeding bin are connected in sequence from top to bottom; the pre-conveying pipe is fixedly connected with the lower end of the pneumatic feeding bin; the feeding pipeline is installed at the output end of the feeding pipeline; the pneumatic feeding bin comprises a barrel with an upper cylinder and a lower conical cylinder; an annular cylinder lining is fixedly provided on the inner wall of the upper cylinder of the barrel; the lower half of the annular cylinder lining is a cylindrical part coaxially arranged with the upper cylinder of the barrel; the upper half of the annular cylinder lining is provided with a conical cylinder part which is connected to the inner wall of the upper cylinder of the barrel and is connected to the upper end of the cylindrical part as a whole; an air inlet pipe is fixedly provided on the outer wall of the barrel; the air inlet pipe is directly opposite to the connection between the cylindrical part and the conical cylinder part.

[0008] As an optimal technical solution of the utility model, the prepared conveying pipe includes a horizontally arranged round tube; the round tube is fixedly connected to the lower end of the barrel; a motor is installed at one end of the round tube; a shaftless auger blade is installed on the output shaft of the motor; and the other end of the round tube is connected to the feeding pipe.

[0009] As a preferred technical solution of the utility model, it also includes two gas storage tanks and a tee; the tee is used to connect the air inlet pipe and the two gas storage tanks, and an electromagnetic pipeline valve is installed on each branch pipe connecting the tee to the gas storage tank.

[0010] As an optimal technical solution of the utility model, a plurality of vibrating plates are fixed to the lower end surface of the annular cylinder liner; the vibrating plates include vertical plates fixed to the lower end surface of the annular cylinder liner; a rectangular plate obliquely tilted downward and pointing toward the inner wall of the barrel is fixed to the lower end of the vertical plates.

[0011] As a preferred technical solution of the utility model, a check valve is installed on the gas pipeline connected to the gas storage tank.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model pre-conveys powder to a round tube connected to a feeding pipe through a pre-conveyor pipe, which effectively reduces the time for starting the output of powder in a pneumatic feeding bin under high airflow and improves the conveying efficiency of the entire system.

[0014] 2. The utility model forms an airtight front end for conveying the powder in the round tube, which helps to improve the effective use of the gas in the gas storage tank and reduce energy waste.

[0015] 3. The utility model can use two gas storage tanks alternately, thereby improving the delivery frequency of pneumatic conveying of powder raw materials and meeting the needs of mixed and alternate delivery of multiple additives.

[0016] 4. The utility model uses a vibrating plate fixed on the lower end surface of the ring tube inner lining to vibrate under the impact of gas to peel off the attached powder, thereby achieving cleaning-free maintenance.

[0017] 5. The utility model installs a check valve on the gas pipe installed on the gas tank, which avoids gas exchange between the two gas tanks, thereby maintaining the overall efficiency of the system; through the control of the electromagnetic pipeline valve, the automatic control of the transportation process can be achieved, thereby improving the degree of production automation.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the pneumatic conveying device for powder raw materials of the utility model.

[0021] Figure 2 It is a schematic diagram of the structure of the feed hopper, pneumatic butterfly valve, pneumatic feeding bin and preparatory conveying pipe.

[0022] Figure 3 It is a schematic diagram of the axial section of the feed hopper, pneumatic butterfly valve, pneumatic feeding bin and preparatory conveying pipe.

[0023] Figure 4 It is a schematic diagram of the structure of the pneumatic feeding bin and the preparatory conveying pipe.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-feed hopper, 2-pneumatic butterfly valve, 3-pneumatic feeding bin, 4-preparation delivery pipe, 5-feeding pipeline, 6-gas storage tank, 7-tee pipe, 8-electromagnetic pipeline valve, 9-gas pipeline, 10-check valve, 31-barrel, 32-ring cylinder lining, 33-inlet pipe, 34-vertical plate, 35-rectangular plate, 41-round pipe, 42-motor, 43-shaftless auger blade. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment one:

[0028] See also Figure 1-4As shown, the utility model is a pneumatic conveying device for powder raw materials, including a feed hopper 1, a pneumatic butterfly valve 2, a pneumatic feeding bin 3, a pre-conveying pipe 4, a feeding pipeline 5, two gas storage tanks 6 and a three-way pipe 7. The feed hopper 1, the pneumatic butterfly valve 2 and the pneumatic feeding bin 3 are connected in sequence from top to bottom. The pre-conveying pipe 4 is fixedly connected to the lower end of the pneumatic feeding bin 3. The feeding pipeline 5 is installed at the output end of the feeding pipeline 5. The pneumatic feeding bin 3 includes a barrel 31 with an upper cylinder and a lower conical cylinder. An annular cylinder liner 32 is fixed to the inner wall of the upper cylinder of the barrel 31. The lower half of the annular cylinder liner 32 is a cylindrical part coaxially arranged with the upper cylinder of the barrel 31. The upper half of the annular cylinder liner 32 is provided with a conical cylinder part that connects the inner wall of the upper cylinder of the barrel 31 and the upper end of the cylindrical part as a whole. An air inlet pipe 33 is fixed through the outer wall of the barrel 31. The air inlet pipe 33 is directly opposite to the connection between the cylindrical part and the conical part. The preparatory conveying pipe 4 specifically includes a horizontally arranged circular pipe 41. The circular pipe 41 is fixedly connected to the lower end of the barrel 31. A motor 42 is installed at one end of the circular pipe 41. A shaftless auger blade 43 is installed on the output shaft of the motor 42. The other end of the circular pipe 41 is connected to the feeding pipe 5. The three-way pipe 7 is used to connect the air inlet pipe 33 and the two gas storage tanks 6, and an electromagnetic pipeline valve 8 is respectively installed on the branch pipes connecting the three-way pipe 7 and the gas storage tank 6. The two gas storage tanks 6 are used alternately, which can increase the conveying frequency of the pneumatic conveying of the powder raw materials and meet the mixed alternating conveying of multiple additives.

[0029] The preparation conveying pipe 4 conveys most of the powder to the circular pipe 41 connected to the feeding pipe 5 in advance, effectively shortening the time for the powder in the pneumatic feeding bin 3 to start outputting under high airflow, and the powder in the circular pipe 41 forms an airtight front end of the conveying, thereby improving the effective utilization of the gas in the gas storage tank 6.

[0030] The external weighing device delivers a fixed amount of powder into the feed hopper 1. The pneumatic butterfly valve 2 is opened and closed three times to ensure that the powder in the hopper 1 is shaken off into the pneumatic feeding bin 3 below. After the pneumatic butterfly valve 2 is operated, the motor 42 of the preparatory conveying pipe 4 is started, and the shaftless auger blade 43 conveys most of the powder in the pneumatic feeding bin 3 to the inside of the round tube 41. The shaftless auger blade 43 is used to convey the powder, and the center can still quickly carry away the powder through the airflow. Open one of the electromagnetic pipeline valves 8, and the gas in the corresponding gas storage tank 6 is transported to the pneumatic feeding bin 3 in large quantities, driving the remaining powder in the pneumatic feeding bin 3 to rush to the preparatory conveying pipe 4 to push a large amount of feed additive powder from the feeding pipe 5 to the mixer for feed processing. Pneumatic conveying can be used to transport materials from the ground to a high place and can be used for long-distance conveying. The mixer used in feed processing has multiple feeding positions, which can simplify the peripheral equipment of the feed processing mixer. In addition, pneumatic conveying can add feed additive powder quickly, and when it is in place, it is directly diffused and sprayed out. At the same time, it helps to shorten the time it takes to mix the feed additive powder evenly.

[0031] In order to clean the powders attached to the inner wall of the annular cylinder lining 32 without maintenance, a plurality of vibrating paddles are fixed to the lower end surface of the annular cylinder lining 32. The vibrating paddles include a vertical plate 34 fixed to the lower end surface of the annular cylinder lining 32. A rectangular plate 35 is fixed at the lower end of the vertical plate 34, which is tilted downward and points to the inner wall of the barrel 31. When a large amount of gas in the gas storage tank 6 quickly enters the pneumatic feeding bin 3, it impacts the vertical plate 34. The vibration of the vertical plate 34 causes the vertical plate 34 and the annular cylinder lining 32 to vibrate synchronously, and the powders attached to the inner wall of the annular cylinder lining 32 are peeled off, so as to achieve the purpose of cleaning and maintenance-free.

[0032] In order to prevent the gas exchange between the two gas tanks 6 from reducing the overall efficiency, a check valve 10 is installed on the gas pipeline 9 connected to the gas tank 6.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pneumatic conveying device for powdered raw materials, characterized in that: It comprises a feed hopper (1), a pneumatic butterfly valve (2), a pneumatic feeding bin (3), a preparatory feeding pipe (4) and a feeding pipe (5); The feed hopper (1), the pneumatic butterfly valve (2) and the pneumatic feeding bin (3) are connected in sequence from top to bottom; The preparation conveying pipe (4) is fixedly connected to the lower end of the pneumatic feeding bin (3); the feeding pipe (5) is installed at the output end of the feeding pipe (5); The pneumatic feeding bin (3) comprises a barrel (31) with an upper cylinder and a lower conical cylinder; an annular liner (32) is fixed to the inner wall of the upper cylinder of the barrel (31); the lower half of the annular liner (32) is a cylindrical portion coaxially arranged with the upper cylinder of the barrel (31); the upper half of the annular liner (32) is provided with a conical portion connected to the inner wall of the upper cylinder of the barrel (31) and the upper end of the cylindrical portion as a whole; an air intake pipe (33) is fixedly passed through the outer wall of the barrel (31); the air intake pipe (33) is directly opposite to the connection between the cylindrical portion and the conical portion.

2. The pneumatic conveying device for powdered raw materials according to claim 1, characterized in that: The prepared delivery pipe (4) comprises a horizontally arranged circular pipe (41); the circular pipe (41) is fixedly connected to the lower end of the material barrel (31); a motor (42) is mounted on one end of the circular pipe (41); a shaftless auger blade (43) is mounted on the output shaft of the motor (42); and the other end of the circular pipe (41) is connected to the material delivery pipe (5).

3. The pneumatic conveying device for powdered raw materials according to claim 1, characterized in that: It also includes two gas storage tanks (6) and a three-way pipe (7); the three-way pipe (7) is used to connect the air intake pipe (33) and the two gas storage tanks (6), and a solenoid pipeline valve (8) is installed on each branch pipe connecting the three-way pipe (7) and the gas storage tank (6).

4. The pneumatic conveying device for powdered raw materials according to claim 1, characterized in that: A plurality of vibrating plates are fixed to the lower end surface of the annular cylinder liner (32); the vibrating plates include vertical plates (34) fixed to the lower end surface of the annular cylinder liner (32); and a rectangular plate (35) is fixed to the lower end of the vertical plate (34) and is inclined downward and directed toward the inner wall of the barrel (31).

5. The pneumatic conveying device for powdered raw materials according to claim 3, characterized in that: A check valve (10) is installed on the gas delivery pipe (9) connected to the gas storage tank (6).

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