Powder feeding device

Abstract

The utility model provides a powder feeding device, and relates to the field of feeding devices. The powder feeding device comprises a shell, a feeding device and a discharging device, wherein a cavity, a feeding port and a discharging port are formed in the shell; the filtering part is located in the cavity and connected with the shell, and a gap is formed between the outer side wall of the filtering part and the inner side wall of the shell; and the pressure adjusting part is provided with an air pipe assembly communicated with the gap and an air source communicated with the air pipe assembly, and the air source can adjust the pressure at the gap through the air pipe assembly. In the corresponding negative pressure state, the powdery materials can be adsorbed to the inner wall of the filtering piece, so that the situation that the bowl loading amount is affected due to falling of the materials is avoided; furthermore, the falling of the materials can be recovered by adjusting the magnitude of the negative pressure; and when the filtering piece is blocked, the filtering piece can be dredged by adjusting the gap to be in a positive pressure state.

Description

Technical Field

[0001] The present application relates to the field of feeding devices, and in particular to a powder feeding device. Background Art

[0002] The powder feeding device is one of the essential equipment in the production of powdered materials, which is used to control the amount of powdered materials loaded into the bowl. The existing powder feeding device is formed into a cylindrical structure, and the material enters the device from the feed port at the top, and then is discharged from the discharge port at the bottom through the spiral stirring device to realize the feeding action. However, the powdered material will fall down by itself under the action of gravity, or the powdered material will adhere to the inner wall of the device, which will result in poor accuracy of the amount of powdered materials loaded into the bowl. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a powder feeding device to solve the problem that the existing powder feeding device cannot accurately control the amount of material loaded into the bowl.

[0004] According to the above purpose, the utility model provides a powder feeding device, wherein the powder feeding device comprises:

[0005] A shell body is formed with a cavity, a feed inlet and a discharge outlet;

[0006] a filter element, located in the cavity and connected to the housing, a gap being formed between an outer side wall of the filter element and an inner side wall of the housing; and

[0007] The pressure regulating part is provided with an air pipe assembly communicated with the gap and an air source communicated with the air pipe assembly, and the air source can regulate the pressure at the gap through the air pipe assembly.

[0008] Preferably, the shell is formed into a cylindrical structure, and along the axial direction of the shell, the shell is formed with a cylindrical section and a conical section connected in sequence, the top end surface of the cylindrical section away from the conical section forms the feed port, and the bottom end surface of the conical section away from the cylindrical section forms the discharge port.

[0009] Preferably, a plurality of through holes communicating with the gap are formed around the bottom end side wall of the cylindrical section; and the air pipe assembly includes a plurality of air pipe joints connected to the through holes in a one-to-one correspondence.

[0010] Preferably, the air pipe assembly further comprises a plurality of connecting pipes, and each of the air pipe joints is respectively connected to a positive pressure air source and a negative pressure air source through two connecting pipes; and a solenoid valve is provided at the connecting pipe.

[0011] Preferably, the powder feeding device also includes a connecting piece formed as a columnar structure; along the axial direction of the connecting piece, a recessed portion is formed around the inner wall of the bottom end of the connecting piece, so that a first step is formed at the inner wall of the connecting piece; the recessed depth of the recessed portion is not less than the thickness of the cylindrical section.

[0012] Preferably, a first internal thread is formed at the inner wall of the recessed portion, and an external thread corresponding to the first internal thread is formed at the outer side wall of the top of the cylindrical section, so that the connecting member is threadably connected to the housing.

[0013] Preferably, the filter element is formed with a filter screen portion and an overlap, the filter screen portion is formed as a cylindrical tube structure; the overlap is formed as a circular ring structure and is located at the top end surface of the filter screen portion.

[0014] Preferably, the inner diameter of the truncated cone section is smaller than the inner diameter of the cylindrical section, so that a second step is formed at the top of the truncated cone section; when the connecting member is connected to the shell correspondingly, the overlap edge is located between the top end surface of the cylindrical section and the first step and abuts against the cylindrical section, and the bottom end surface of the filter part abuts against the second step.

[0015] Preferably, the filtering accuracy of the filter part is 2 microns.

[0016] Preferably, a second internal thread is formed on the inner wall of the top end of the connecting piece for connecting to the hopper.

[0017] According to the powder feeding device of the utility model, a filter connected to the shell is arranged in the internal cavity of the shell, and a gap is formed between the filter and the inner wall of the shell; in addition, the device is also provided with a pressure regulating part, which includes an air pipe assembly connected to the above gap and an air source connected to the air pipe assembly, so that the air source can adjust the pressure at the gap through the air pipe assembly (it can be positive pressure or negative pressure), that is, under the corresponding negative pressure state, the powdered material can be adsorbed on the inner wall of the filter to avoid the material falling and affecting the filling amount; further, adjusting the negative pressure can restore the falling of the material; and when the filter is blocked, the filter can be unblocked by adjusting the gap to a positive pressure state. In this way, the powder feeding device of the utility model can control the filling amount of the material within the standard range.

[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 Schematic diagram of a powder feeding device according to an embodiment of the utility model;

[0021] Figure 2 It is a partial cross-sectional view of a powder feeding device according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the pipeline connection of the pressure regulating part of an embodiment of the utility model.

[0023] Icons: 1-shell; 10-cylindrical section; 11-cone section; 12-second step; 2-connecting piece; 20-recessed portion; 21-first step; 3-filter element; 30-filter screen portion; 31-lap edge; 32-gap; 40-air pipe joint; 41-connecting pipe; 42-positive pressure air source; 43-negative pressure air source; 44-solenoid valve; 5-hopper. DETAILED DESCRIPTION

[0024] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0025] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0026] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0028] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0029] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0030] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0031] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0032] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0033] According to the utility model, a powder feeding device is provided, such as Figures 1 to 3 As shown, the powder feeding device in this embodiment includes a housing 1, a filter 3 and a pressure regulating part, the filter 3 is located inside the housing 1 and forms a gap 32 with the inner wall of the housing 1, and the pressure regulating part can adjust the pressure at the gap 32. Hereinafter, the specific structure of the above-mentioned parts of the powder feeding device according to the utility model will be described in detail.

[0034] In this embodiment, if Figure 1 to Figure 2 As shown, the shell 1 is formed into a cylindrical structure, that is, a cavity is formed inside it; further, along the axial direction of the shell 1, the shell 1 is formed with a cylindrical section 10 and a truncated cone section 11 connected in sequence, and the top end surface of the cylindrical section 10 away from the truncated cone section 11 is formed with a feed port, and the bottom end surface of the truncated cone section 11 away from the cylindrical section 10 is formed with the discharge port, which is used to import and export powdered materials respectively. It should be noted that there is no specific restriction on the outer diameter, inner diameter and other specification parameters of the cylindrical section 10 and the truncated cone section 11, which can be determined comprehensively according to actual conditions such as the size of the production site and the material output.

[0035] In addition, the feeding device also includes a connecting member 2 formed into a columnar structure. Figure 2As shown, along the axial direction of the connecting member 2 (i.e., the axial direction of the housing 1), a recessed portion 20 is formed around the inner wall of the bottom end of the connecting member 2, so that a first step 21 is formed at the inner wall of the connecting member 2. Further, a first internal thread is formed at the inner wall of the recessed portion 20, and an external thread corresponding to the first internal thread is formed on the outer wall of the top of the cylindrical section 10, so that the connecting member 2 is threadedly connected to the housing 1. Furthermore, in the housing 1 in this embodiment, the inner diameter of the truncated cone section 11 is smaller than the inner diameter of the cylindrical section 10, so that a second step 12 is formed at the top of the truncated cone section 11.

[0036] In addition, a second internal thread is formed on the inner wall of the top end of the connecting member 2 for connecting to the hopper 5, thereby making it easier to introduce powdered materials.

[0037] like Figure 2 As shown, the filter element 3 in this embodiment is formed with a filter screen portion 30 and a lap 31. The filter screen portion 30 is formed into a cylindrical tube structure similar to the above-mentioned cylindrical section 10, and the lap 31 is formed into a circular ring structure and is located at the top end surface of the filter screen portion 30. When the connector 2 is connected to the housing 1, the lap 31 is located between the top end surface of the cylindrical section 10 and the first step 21 and abuts against the cylindrical section 10, while the bottom end surface of the filter screen portion 30 abuts against the second step 12. In other words, the filter element 3 in this embodiment is tightly connected to the housing 1 through the downward pressure generated by the connector 2, and a gap 32 is formed between the filter screen portion 30 and the inner wall of the housing 1.

[0038] It should be noted that the tightness of the connection between the lap 31 and the top end face of the cylindrical section 10 and the tightness of the connection between the bottom end face of the filter part 30 and the second step 12 should be ensured, so that the gap 32 maintains a negative pressure and prevents the escape of fine powder during the subsequent positive pressure cleaning of the filter (if the two places are not well sealed, gas will enter from the leak, thereby reducing the negative pressure at the gap 32). In order to better achieve the above technical effects, along the radial direction of the connector 2 (i.e., the radial direction of the shell 1), the depth of the recess 20 should not be less than the thickness of the cylindrical section 10. It should be further noted that there are no specific restrictions on the length of the lap 31 and the size of the gap 32, etc., which should be determined comprehensively according to actual conditions such as the size of the shell 1, as long as it is convenient to achieve the technical effect of controlling the powdered material. In addition, the filtering accuracy of the filter part 30 is 2 microns, so that the powdered material can be adsorbed only on the inner wall of the filter part 30, and the powdered material can be prevented from being inhaled by the air pipe assembly described below as much as possible.

[0039] In this embodiment, the pressure regulating unit includes an air pipe assembly connected to the gap 32 and an air source connected to the air pipe assembly. Figure 1 to Figure 2As shown, the bottom side wall of the cylindrical section 10 is surrounded by a plurality of through holes connected to the gap 32. The number of the through holes is not fixed. For example, four through holes are provided in this embodiment. In addition, the through holes should be evenly arranged to ensure the uniformity of the air source acting on the powdered material as described below. The air pipe assembly includes a plurality of air pipe connectors 40 connected to the through holes in a one-to-one correspondence. The connection method between the air pipe connector 40 and the through holes is not fixed. For example, a threaded connection method is used in this embodiment, or a clamping connection method or the like can be used, as long as the stability of the connection between the two and the sealing of the connection can be ensured.

[0040] In this embodiment, the trachea assembly further includes a plurality of connecting pipes 41, and each trachea joint 40 is connected to a positive pressure air source 42 and a negative pressure air source 43 respectively through two connecting pipes 41. Figure 3 As shown, each air pipe joint 40 in this embodiment is connected to the positive pressure air source 42 and the negative pressure air source 43 by a T-shaped pipeline, and a solenoid valve 44 is also provided at the connecting pipe 41 connecting the positive air source and the air pipe joint 40. It should be noted that the form of the positive pressure air source 42 and the negative pressure air source 43 is not fixed. For example, the positive pressure air source 42 in this embodiment is configured as an air pump to deliver gas to the gap 32. In addition, the negative pressure air source 43 is configured as a dust suction system to extract the gas at the gap 32, so that by controlling the switch of the solenoid valve 44 and the action state of the positive pressure air source 42 and the negative pressure air source 43 (this control process belongs to the conventional technical means in this field, so it will not be repeated), the pressure at the gap 32 can be adjusted accordingly.

[0041] According to the powder feeding device of the utility model, a filter element 3 connected to the shell body 1 is arranged in the internal cavity of the shell body 1, and a gap 32 is formed between the filter element 3 and the inner wall of the shell body 1; in addition, the device is also provided with a pressure regulating part, which includes an air pipe assembly connected to the above-mentioned gap 32 and an air source connected to the air pipe assembly, so that the air source can adjust the pressure at the gap 32 through the air pipe assembly (it can be positive pressure or negative pressure), thereby being able to control the amount of material loaded in the bowl within a standard range.

[0042] Thus, before the feeding device is started, the electromagnetic valve 44 can be closed and the negative pressure air source 43 can be operated, that is, the gap 32 is in a negative pressure state (the size of the negative pressure should be determined comprehensively according to the particle size of the powdered material, etc.) to prevent the material from falling randomly; when the feeding device is started and in working state, the negative pressure at the gap 32 can be adjusted to ensure the smooth falling of the material; further, when it is detected that the filling amount is within the preset range, the negative pressure at the gap 32 can be adjusted again to adsorb all the materials at the filter part 30, that is, to prevent the materials from falling and affecting the filling amount. Since the filter part 30 is relatively fine, the materials will basically not be sucked out by the dust collection system. In addition, when the filter part 30 is used for a long time and is blocked by materials, the electromagnetic valve 44 can be opened and the positive pressure air source 42 can be operated to clear the filter part 30.

[0043] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A powder feeding device, characterized in that: The powder feeding device comprises: A shell body is formed with a cavity, a feed inlet and a discharge outlet; a filter element, located in the cavity and connected to the housing, with a gap formed between an outer side wall of the filter element and an inner side wall of the housing; and The pressure regulating part is provided with an air pipe assembly communicated with the gap and an air source communicated with the air pipe assembly, and the air source can regulate the pressure at the gap through the air pipe assembly.

2. The powder feeding device according to claim 1, characterized in that: The shell is formed into a cylindrical structure. Along the axial direction of the shell, the shell is formed with a cylindrical section and a truncated cone section connected in sequence. The top end surface of the cylindrical section away from the truncated cone section forms the feed port, and the bottom end surface of the truncated cone section away from the cylindrical section forms the discharge port.

3. The powder feeding device according to claim 2, characterized in that: The bottom end side wall of the cylindrical section is surrounded by a plurality of through holes connected to the gap; the air pipe assembly includes a plurality of air pipe joints connected to the through holes in a one-to-one correspondence.

4. The powder feeding device according to claim 3, characterized in that: The air pipe assembly also includes a plurality of connecting pipes, and each of the air pipe joints is respectively connected to a positive pressure air source and a negative pressure air source through two connecting pipes; and a solenoid valve is provided at the connecting pipe.

5. The powder feeding device according to claim 2, characterized in that: The powder feeding device also includes a connecting piece formed into a columnar structure; along the axial direction of the connecting piece, a recessed portion is formed around the inner wall of the bottom end of the connecting piece, so that a first step is formed at the inner wall of the connecting piece; the recessed depth of the recessed portion is not less than the thickness of the cylindrical section.

6. The powder feeding device according to claim 5, characterized in that: A first internal thread is formed at the inner wall of the recessed portion, and an external thread corresponding to the first internal thread is formed at the outer side wall of the top of the cylindrical section, so that the connecting member is threadedly connected to the housing.

7. The powder feeding device according to claim 5, characterized in that: The filter element is formed with a filter screen portion and a lap edge, wherein the filter screen portion is formed as a cylindrical tube structure; the lap edge is formed as a circular ring structure and is located at the top end surface of the filter screen portion.

8. The powder feeding device according to claim 7, characterized in that: The inner diameter of the truncated cone section is smaller than the inner diameter of the cylindrical section, so that a second step is formed at the top of the truncated cone section; when the connecting member is connected to the shell correspondingly, the overlap edge is located between the top end surface of the cylindrical section and the first step and abuts against the cylindrical section, and the bottom end surface of the filter part abuts against the second step.

9. The powder feeding device according to claim 7, characterized in that: The filtering accuracy of the filter screen is 2 microns.

10. The powder feeding device according to claim 5, characterized in that: A second internal thread is formed on the inner wall of the top end of the connecting piece for connecting to the hopper.

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