Self-cleaning powder suction device

Abstract

A self-cleaning powder suction device, wherein a connecting box with a through upper end face is arranged on the top of the powder conveying barrel, and the interior of the connecting box is hollow to form an air cavity; two independent connecting air cavities are arranged in the air cavity, one connecting air cavity corresponds to a group of filter groups, and the upper end exhaust port of the powder filter element in a group of filter groups is connected to a connecting air cavity; a ventilation box is also arranged on the top of the connecting box, and the interior of the ventilation box is hollow, and the interior of the ventilation box is divided into two independent air inlet cavities and an exhaust cavity, and the two air inlet cavities are respectively connected with the two connecting air cavities in a one-to-one correspondence; an external air hole connected to the outside is arranged on the air inlet cavity; a through air hole is arranged on the cavity wall where the air inlet cavity and the exhaust cavity are connected; two groups of control air valves for controlling the opening and closing of the two air holes are also installed on the connecting box; the cleanliness of the powder filter element can be ensured through periodic cleaning work to reduce the use pressure of the powder filter element, thereby increasing its service life.

Description

Technical Field

[0001] The invention belongs to the technical field of powder conveying and relates to a self-cleaning powder suction device. Background Art

[0002] In the prior art, the powder material is mostly transported by extracting it in the form of air extraction, and then the powder is separated from the air by a filtering structure to achieve transportation. In the process of separating the powder from the air, the powder is easy to adhere to the filter element and cause the filter element to be blocked. If the filter element is directly replaced, it will cost a lot. Therefore, the filter element needs to be cleaned after using it for a period of time.

[0003] Most filter element cleaning devices in the prior art use high-pressure gas through an air gun to spray off the powder attached to the filter element. This cleaning method is not only inefficient, but the high-pressure gas will cause greater pressure on the filter element, thereby reducing the service life of the filter element. Summary of the invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The self-cleaning powder suction device comprises: a powder conveying barrel, a side end of which is provided with an inlet for powder to enter, and a bottom end of which is provided with an outlet for powder to be discharged;

[0006] Two filter groups consisting of several powder filter elements are also arranged inside the powder conveying barrel;

[0007] The powder conveying barrel is also provided with an exhaust pipe port connected with the upper exhaust port of the powder filter element; the top of the powder conveying barrel is provided with a connection box with the upper end surface penetrated, and the interior of the connection box is hollow to form an air cavity;

[0008] Two independent connecting air cavities are arranged in the air cavity, one connecting air cavity corresponds to a filter group, and the upper end exhaust port of the powder filter element in a filter group is connected to one connecting air cavity;

[0009] A ventilation box is also provided on the top of the connection box. The interior of the ventilation box is hollow. The interior of the ventilation box is divided into two independent air intake chambers and one exhaust chamber. The two air intake chambers are connected to the two connection air chambers one by one.

[0010] The air inlet cavity is provided with an external air hole communicating with the outside;

[0011] A through vent hole is arranged on the cavity wall where the air inlet cavity and the air exhaust cavity are connected; two sets of control air valves for controlling the opening and closing of the two vent holes are also installed on the connection box;

[0012] The exhaust pipe port is installed in the exhaust cavity and communicated with the exhaust cavity.

[0013] As a further solution of the present invention: a feed switch valve is installed on the feed inlet of the powder conveying barrel.

[0014] As a further solution of the present invention: a discharge switch valve is installed on the discharge port of the powder conveying barrel.

[0015] As a further solution of the present invention: the number of powder filter elements in each filter group is at least two.

[0016] The beneficial effects of the present invention are as follows: during the feeding process, the cleaning effect can be achieved without disassembly, so that the cleanliness of the powder filter element can be ensured through periodic cleaning work, so as to reduce the use pressure of the powder filter element and thus increase its service life;

[0017] At the same time, compared with the traditional spray cleaning structure, this cleaning method has less impact on the powder filter element, further improving the service life of the powder filter element;

[0018] At the same time, compared with the traditional spray cleaning structure's point-type multiple-jet cleaning method, this structural form can achieve all-round cleaning and improve cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the external air hole in the present invention.

[0021] Figure 3 It is a structural schematic diagram of the connection box in the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the connecting air cavity in the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. It should be understood that the present application is not limited to the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention provides Figures 1 to 4 In the embodiment of the present invention, the self-cleaning powder suction device comprises: a powder conveying barrel 1, a side end of the powder conveying barrel 1 is further provided with an inlet 2 for powder to enter, and a bottom end of the powder conveying barrel 1 is further provided with an outlet (not shown) for powder to be discharged;

[0028] Two filter groups consisting of a plurality of powder filter elements 8 are also arranged inside the powder conveying barrel 1;

[0029] The powder conveying barrel 1 is also provided with an exhaust pipe port 4 connected to the exhaust port at the upper end of the powder filter element 8; during the powder conveying process, the exhaust pipe port 4 is externally connected to a negative pressure generator, and a negative pressure environment is formed in the powder conveying barrel 1 through the negative pressure generator; thereby, the powder is drawn in from the feed port 2 (the feed port 2 is externally connected to a material source), filtered by the powder filter element 8 in the filter group, and the powder remains in the powder conveying barrel 1, and the air enters from the filter port at the side end of the powder filter element 8 and is discharged from the exhaust pipe port 4 through the exhaust port;

[0030] A connecting box 7 with a through upper end surface is provided on the top of the powder conveying barrel 1, and the interior of the connecting box 7 is hollow to form an air cavity;

[0031] Two independent connecting air cavities 13 are arranged in the air cavity, one connecting air cavity 13 corresponds to one filter group, and the upper exhaust port of the powder filter element 8 in one filter group is connected to one connecting air cavity 13;

[0032] A ventilation box 11 is also provided on the top of the connection box 7. The ventilation box 11 is hollow inside. The interior of the ventilation box 11 is divided into two independent air intake chambers 11 and an exhaust chamber 14. The two air intake chambers 11 are connected to the two connection chambers 13 one by one.

[0033] The air inlet cavity 11 is provided with an external air hole 9 communicating with the outside;

[0034] A through vent hole 10 is provided on the cavity wall where the air inlet cavity 11 and the air exhaust cavity 14 meet; two sets of control valves 12 for controlling the opening and closing of the two vent holes 10 are also installed on the connection box 7;

[0035] The exhaust pipe port 4 is installed in the exhaust cavity 14 and communicated with it;

[0036] When the powder filter element 8 is cleaned, the feed inlet 2 and the discharge port are closed, so that the inside of the powder conveying barrel 1 tends to be sealed;

[0037] The exhaust pipe port 4 is externally connected to a negative pressure generator; the filter group to be cleaned is selected, and then the air vent 10 on the air inlet cavity 11 corresponding to the filter group is closed by controlling the air valve 12, and air is sucked in from the external air hole 9 corresponding to the filter group, enters from the upper exhaust port of the powder filter element 8 of the filter group, and is discharged from the side air inlet of the powder filter element 8. The powder attached to the powder filter element 8 is blown off by the reverse wind force, and the air is then extracted from the powder filter element 8 of another filter group;

[0038] Then the air valve 12 is controlled to open the vent 10, and at the same time another air valve 12 is controlled to close another vent 10, so that the vent 10 on the air inlet cavity 11 corresponding to the other filter group is closed, and then the air is sucked from the external air hole 9 corresponding to the group through the negative pressure generator, and the same work as the above steps is performed to achieve cleaning;

[0039] Then, the powder filter element 8 in the filter group is cleaned by repeatedly switching the cleaning operation.

[0040] During the feeding process, the cleaning effect can be achieved without disassembly, so that the cleanliness of the powder filter element 8 can be ensured through periodic cleaning work, so as to reduce the use pressure of the powder filter element 8 and thus increase its service life;

[0041] At the same time, compared with the traditional spray cleaning structure, this cleaning method has less impact on the powder filter element 8, further improving the service life of the powder filter element 8;

[0042] At the same time, compared with the traditional spray cleaning structure's point-type multiple-jet cleaning method, this structural form can achieve all-round cleaning and improve cleaning efficiency.

[0043] Furthermore, a feed opening and closing valve 3 is installed on the feed opening 2 of the powder conveying barrel 1 , and the feed opening 2 is opened and closed by the feed opening opening 3 .

[0044] Furthermore, a discharge opening and closing valve 5 is installed on the discharge port of the powder conveying barrel 1, and the discharge port is opened and closed through the discharge port.

[0045] Furthermore, the number of powder filter elements 8 in each filter group is at least two.

[0046] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Self-cleaning powder suction device, including: A powder conveying barrel, the side end of which is provided with an inlet for powder to enter, and the bottom end of which is provided with an outlet for powder to be discharged; Two filter groups consisting of several powder filter elements are also arranged inside the powder conveying barrel; The powder conveying barrel is also provided with an exhaust pipe port connected to the upper exhaust port of the powder filter element; the characteristic is that a connection box with an upper end surface penetrating therethrough is provided on the top of the powder conveying barrel, and the interior of the connection box is hollow to form an air cavity; Two independent connecting air cavities are arranged in the air cavity, one connecting air cavity corresponds to a filter group, and the upper end exhaust port of the powder filter element in a filter group is connected to one connecting air cavity; A ventilation box is also provided on the top of the connection box. The interior of the ventilation box is hollow. The interior of the ventilation box is divided into two independent air intake chambers and one exhaust chamber. The two air intake chambers are connected to the two connection air chambers one by one. The air inlet cavity is provided with an external air hole communicating with the outside; A through vent hole is arranged on the cavity wall where the air inlet cavity and the air exhaust cavity are connected; two sets of control air valves for controlling the opening and closing of the two vent holes are also installed on the connection box; The exhaust pipe port is installed in the exhaust cavity and communicated with the exhaust cavity.

2. The self-cleaning powder suction device according to claim 1, characterized in that: A feed switch valve is installed on the feed port of the powder conveying barrel.

3. The self-cleaning powder suction device according to claim 1, characterized in that: A discharge switch valve is installed on the discharge port of the powder conveying barrel.

4. The self-cleaning powder suction device according to claim 1, characterized in that: The number of powder filter elements in each filter group is at least two.

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