Powder negative pressure conveying device

Abstract

The utility model relates to the related field of powder conveying technology, in particular to a powder negative pressure conveying device which comprises a device body, a vacuum hopper, a filtering assembly and a discharging assembly are arranged in the device body, an observation opening is formed in the front end of the vacuum hopper, a feeding opening is formed in the side wall of the vacuum hopper, and a connecting hopper is arranged at the lower end of the vacuum hopper. An upper cover plate is installed at the top of the vacuum hopper, a vacuum generator is arranged at the upper end of the upper cover plate, a reverse blowing air bag and an air outlet end are arranged on the two sides of the vacuum generator correspondingly, the filtering assembly is arranged on the inner side of the inner shell, the discharging assembly is arranged at the lower end of the connecting hopper, and the filtering assembly comprises a supporting ring and a mounting plate. The discharging assembly comprises a supporting plate and a material collecting pipe, the filtering and shielding effect on powder in equipment can be achieved, the powder is prevented from floating upwards and entering the vacuum generator under the negative pressure effect, low-pressure gas conveying operation on the powder can be achieved, and friction between materials and the pipe wall can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of powder conveying technology, and in particular to a powder negative pressure conveying device. Background Technology

[0002] Powder refers to the form of a discrete aggregate of solid particles. However, powder also has the properties of fluids. It has no specific shape and can flow and fly. In our production and daily life, many materials are in powder form. Due to the unique state of these powder materials, they are prone to generating dust, so they need to be treated specially during transportation.

[0003] The prior art utility model patent with publication number CN 221853453 U proposes a negative pressure conveying device for powder materials. Through the setting of a diversion device, it can ensure the diversion of powder materials and air, so that the powder materials are fully conveyed into the collection box without leakage. Through the setting of a dust removal device, it can effectively prevent the powder materials from rising and avoid the powder materials from affecting the operation of the exhaust pump.

[0004] However, it lacks the ability to stably control the output of the equipment. After the powder is under negative pressure, it is directly sent into the collection box below, which cannot guarantee the stable conveying capacity of the powder. After the collection box is full, it is necessary to stop the machine for replacement. The efficiency is low and the practicality is poor. Therefore, we need to upgrade and modify the existing technology to overcome the existing problems and shortcomings. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure powder conveying device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Design a powder negative pressure conveying device, including a device body, which contains a vacuum hopper, a filter assembly, and a discharge assembly. The vacuum hopper has an observation port at the front end and a feed inlet on the side wall. A connecting hopper is provided at the lower end of the vacuum hopper. A top cover plate is installed on the top of the vacuum hopper. A vacuum generator is provided at the upper end of the top cover plate. A backflush air bag and an air outlet are respectively provided on both sides of the vacuum generator. The filter assembly is located inside the inner shell, and the discharge assembly is located at the lower end of the connecting hopper.

[0008] Furthermore, the filter assembly includes a support ring and a mounting plate. The support ring is fixed inside the vacuum hopper, and the mounting plate is disposed on the upper end of the support ring and has multiple sets of filter covers extending through it.

[0009] Furthermore, the discharge assembly includes a pallet and a collection pipe. A Roots blower is provided at the upper end of the pallet and an air inlet is provided on the outside of the Roots blower. A silencer is connected to the inside of the Roots blower.

[0010] Furthermore, the upper end of the support ring is provided with two sets of positioning blocks, the mounting plate is provided with two sets of positioning holes, the positioning blocks are inserted into the positioning holes, and the upper end of the mounting plate is provided with two sets of handles.

[0011] Furthermore, the collecting pipe is connected to one side of the silencer, and the upper end and the outer side of the collecting pipe are respectively provided with a discharge port and a discharge pipe, and the upper end of the discharge port is connected to the bottom of the connecting hopper.

[0012] Furthermore, the vacuum hopper is provided with an inner shell, and a heating tube is provided inside the inner shell, with a protective cover at the upper end of the heating tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model includes a filter assembly, a support ring, a positioning block, a mounting plate, a filter cover, a positioning hole, and a handle. Multiple filter covers are placed inside the vacuum hopper using the mounting plate and support ring, and positioned using the positioning block and positioning hole. This achieves the effect of filtering and blocking powder inside the equipment, preventing powder from floating up under negative pressure and entering the vacuum generator. The filter covers are easy to install and remove, facilitating maintenance and effectively improving the practicality of the device.

[0015] 2. This utility model is equipped with a discharge assembly, a pallet, a Roots blower, an air inlet, a silencer, a collection pipe, a discharge port, and a discharge pipe. The Roots blower draws air from the outside of the air inlet, causing the gas to pass through the silencer for noise reduction and diversion. The airflow then enters the collection pipe and is blown towards the discharge pipe, thereby enabling low-pressure gas conveying of powder. The slow and stable conveying method effectively reduces friction between the material and the pipe wall, consumes less energy, and reduces equipment operating costs.

[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure according to the present utility model;

[0019] Figure 2 This is an exploded view of the overall structure according to this utility model;

[0020] Figure 3 An exploded view of the filter assembly according to this utility model;

[0021] Figure 4 This is an exploded view of the discharge assembly according to this utility model.

[0022] In the diagram: 1. Device body; 2. Vacuum hopper; 21. Observation port; 22. Feed inlet; 3. Connecting hopper; 4. Top cover plate; 41. Vacuum generator; 42. Backflush air manifold; 43. Air outlet; 5. Inner shell; 51. Heating tube; 52. Protective cover; 6. Filter assembly; 61. Support ring; 62. Positioning block; 63. Mounting plate; 64. Filter cover; 65. Positioning hole; 66. Handle; 7. Discharge assembly; 71. Support plate; 72. Roots blower; 73. Air inlet; 74. Silencer; 75. Collection pipe; 76. Drop outlet; 77. Discharge pipe. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown in Figure 4, this embodiment provides a powder negative pressure conveying device, including a device body 1. The device body 1 contains a vacuum hopper 2, a filter assembly 6, and a discharge assembly 7. The vacuum hopper 2 has an observation port 21 at the front end and a feed inlet 22 on the side wall. A connecting hopper 3 is provided at the lower end of the vacuum hopper 2. A top cover plate 4 is installed on the top of the vacuum hopper 2. A vacuum generator 41 is provided on the upper end of the top cover plate 4. A backflush air bag 42 and an air outlet 43 are respectively provided on both sides of the vacuum generator 41. The filter assembly 6 is located inside the inner shell 5. The discharge assembly 7 is located at the lower end of the connecting hopper 3. The inner shell 5 is provided inside the vacuum hopper 2. A heating tube 51 is provided inside the inner shell 5, and a protective cover 52 is provided at the upper end of the heating tube 51. The heating tube 51 facilitates the heating and drying of the powder raw materials inside the vacuum hopper 2, preventing the damp powder from sticking and drying, and ensuring the stability of the powder conveyed by the device.

[0025] Preferably, the filter assembly 6 includes a support ring 61 and a mounting plate 63. The support ring 61 is fixed inside the vacuum hopper 2. The mounting plate 63 is located on the upper end of the support ring 61 and has multiple sets of filter covers 64 running through it. The upper end of the support ring 61 has two sets of positioning blocks 62. The mounting plate 63 has two sets of positioning holes 65. The positioning blocks 62 are inserted into the positioning holes 65. The upper end of the mounting plate 63 has two sets of handles 66. The multiple sets of filter covers 64 are placed inside the vacuum hopper 2 by the mounting plate 63 and the support ring 61, and positioned by the positioning blocks 62 and the positioning holes 65. This achieves the filtering and shielding effect on the powder inside the equipment, preventing the powder from floating up under negative pressure and entering the vacuum generator 41. The filter covers 64 are easy to install and remove, convenient for inspection and maintenance, and effectively improve the practicality of the device.

[0026] Preferably, the discharge assembly 7 includes a pallet 71 and a collection pipe 75. A Roots blower 72 is provided at the upper end of the pallet 71, and an air inlet 73 is provided on the outer side of the Roots blower 72. A silencer 74 is connected to the inner side of the Roots blower 72. The collection pipe 75 is connected to one side of the silencer 74. A drop port 76 and a discharge pipe 77 are respectively provided at the upper end and the outer side of the collection pipe 75. The upper end of the drop port 76 is connected to the bottom of the connecting hopper 3. The Roots blower 72 draws air from the outside of the air inlet 73, so that the gas passes through the silencer 74 for noise reduction and diversion. Then the airflow enters the collection pipe 75 and blows towards the discharge pipe 77. The powder falling in the drop port 76 moves with the airflow, thereby realizing the low-pressure gas conveying operation of the powder. The slow and stable conveying method can effectively reduce the friction between the material and the pipe wall, consume less energy, and reduce the operating cost of the equipment.

[0027] The working principle and operation process of this utility model are as follows: First, the vacuum generator 41 is controlled to work, so that a negative pressure is formed inside the vacuum hopper 2. The feed port 22 is connected to the external raw material, so that the powder material is sucked into the vacuum hopper 2. The floating powder is blocked by the filter cover 64 to prevent it from entering the vacuum generator 41 and affecting the safe operation of the equipment. The powder material below will enter the connecting hopper 3 and then enter the lower discharge assembly 7. Under the action of the Roots blower 72, the gas enters through the air inlet 73 and passes through the silencer 74, and finally enters the collection pipe 75 and is blown to the side of the discharge pipe 77. The powder falling in the drop port 76 moves with the airflow, which can realize the low-pressure gas conveying operation of the powder and effectively reduce the friction between the material and the pipe wall. When it is necessary to clean the filter cover 64, the upper cover plate 4 is removed and the mounting plate 63 is taken out through the handle 66.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A powder negative pressure conveying device, characterized by: The device comprises a device body (1), a vacuum hopper (2), a filter assembly (6) and a discharge assembly (7) are contained in the device body (1), the vacuum hopper (2) is provided with an observation port (21) at the front end and a feeding port (22) is opened in the side wall, a connecting hopper (3) is arranged at the lower end of the vacuum hopper (2), an upper cover plate (4) is mounted on the top of the vacuum hopper (2), a vacuum generator (41) is arranged at the upper end of the upper cover plate (4), a blowback gas bag (42) and an air outlet end (43) are arranged on both sides of the vacuum generator (41), the filter assembly (6) is arranged inside the inner shell (5), and the discharge assembly (7) is arranged at the lower end of the connecting hopper (3).

2. The powder negative pressure conveying device according to claim 1, wherein: The filter assembly (6) comprises a support ring (61) and a mounting plate (63), the support ring (61) is fixed inside the vacuum hopper (2), the mounting plate (63) is arranged at the upper end of the support ring (61) and a plurality of filter covers (64) are arranged inside the mounting plate (63).

3. The powder negative pressure conveying device according to claim 1, wherein: The discharge assembly (7) comprises a supporting plate (71) and a material collecting pipe (75), the supporting plate (71) is provided with a Roots blower (72) at the upper end and an air inlet (73) is arranged outside the Roots blower (72), and a silencer (74) is connected inside the Roots blower (72).

4. The powder negative pressure conveying device according to claim 2, characterized in that: The support ring (61) is provided with two groups of positioning blocks (62) at the upper end, the mounting plate (63) is provided with two groups of positioning holes (65), the positioning blocks (62) are inserted into the positioning holes (65), and the mounting plate (63) is provided with two groups of handles (66) at the upper end.

5. The powder negative pressure conveying device according to claim 3, characterized in that: The material collecting pipe (75) is connected to one side of the silencer (74), the material collecting pipe (75) is provided with a material falling port (76) and a discharge pipe (77) at the upper end and outside respectively, and the upper end of the material falling port (76) is in communication with the bottom of the connecting hopper (3).

6. The powder negative pressure conveying device according to claim 1, wherein: The inner shell (5) is arranged inside the vacuum hopper (2), the inner shell (5) is provided with a heating pipe (51) inside and the heating pipe (51) is provided with a protective cover (52) at the upper end.

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