Dry granulation feeding device

Abstract

The utility model discloses a dry granulation feeding device, which relates to the technical field of ceramic powder granulation and comprises a mixing bin positioned between a fan and a distributor. The mixing bin is connected with the fan through an air inlet pipe, and the air inlet pipe comprises an external connection part and an internal extension part; the internal extension part sequentially comprises a straight line section and an internal contraction section; by adopting the design that the linear section and the adduction section of the air inlet pipe form a Venturi type nozzle structure, when air flow is sprayed out through the adduction section of the internal extension part, the flow speed is increased, the pressure is reduced, a negative pressure environment is formed to suck powder, and the adduction section is located on the lower side of the feeding port; in this way, it is ensured that air flow sprayed out of the inward contraction section receives powder fed from a feeding machine in time when not completely accelerated, gaps are reserved between the straight line section and the inner wall of the mixing bin and between the inward contraction section and the inner wall of the mixing bin, and therefore it can be ensured that the position of the rear side part outside the internal extending part can be matched with a Venturi type nozzle structure to form forward air flow.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic powder granulation, in particular to a dry granulation feeding device. Background Art

[0002] The ceramic industry often uses spray drying tower technology to prepare powders, which requires a feeder to feed the powder into the granulation tower. After the powder enters the feeder, a distributor is required to fully spread the powder in the granulation tower. If you need to improve the feeding efficiency to improve production efficiency, you need to increase the powder feed amount and air flow rate. However, in practice, this method will cause the powder to recoil upward when it falls and mixes with the airflow. This airflow recoil phenomenon will hinder the falling of the powder material, making it difficult to improve the feeding efficiency and unable to ensure the stability of the feeding. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a dry granulation feeding device.

[0004] The technical solution adopted by the utility model to solve its technical problems is: to provide a dry granulation feeding device, including a mixing bin, the mixing bin is located between a fan and a distributor, the rear side of the mixing bin is connected to the fan as an input side, and the front side of the mixing bin is connected to the distributor as an output side; the upper side of the mixing bin is used as a feeding port, and a feeder is arranged on the feeding port; the mixing bin is connected to the fan through an air inlet pipe, the air inlet pipe includes an external part and an internal extension part, the external part is connected to the fan, and the internal extension part is located in the mixing bin and extends to the front side; the internal extension part includes a straight line segment and an inward segment in sequence, the cross-sectional area of ​​the inward segment perpendicular to the extension line decreases from the back to the front direction, and the inward segment is located at the lower side of the feeding port; a gap is left between the straight line segment, the inward segment and the inner wall of the mixing bin.

[0005] According to the dry granulation feeding device provided by the utility model, the design of forming a Venturi nozzle structure by using the straight section and the retracted section of the air inlet pipe has at least the following technical effects: when the airflow is ejected through the retracted section of the internal extension part, the flow velocity increases and the pressure decreases to form a negative pressure environment to suck in the powder, and the retracted section is located at the lower side of the feed port, thereby ensuring that the airflow ejected from the retracted section can receive the powder fed from the feeder in time before it is fully accelerated, avoiding the excessively fast airflow to form a recoil that causes the powder to stay at the feed port or even flow back into the feeder, and a gap is left between the straight section, the retracted section and the inner wall of the mixing bin, thereby ensuring that the rear part outside the internal extension part can cooperate with the Venturi nozzle structure to form a forward airflow, and the airflow sweeps the powder to ensure that the powder is fully merged into the airflow and injected into the distributor.

[0006] As some preferred embodiments of the utility model, a non-return ring is provided on the retracted section.

[0007] As some preferred embodiments of the present utility model, side protrusions are provided on the left and right sides of the mixing bin.

[0008] As some preferred embodiments of the present invention, the feed port is circular, and the edge of the feed port is tangent to the inner wall of the side protrusion.

[0009] As some preferred embodiments of the present utility model, a feed port fixing ring is provided on the feed port, and the feeder is connected to the feed port fixing ring.

[0010] As some preferred embodiments of the present utility model, a side opening is provided on the side of the mixing bin, and a detachable side cover is provided on the side opening.

[0011] As some preferred embodiments of the present invention, the side opening is used as an air supply port to connect to an air supply fan.

[0012] As some preferred embodiments of the present utility model, a one-way valve is provided between the external portion and the mixing chamber.

[0013] As some preferred embodiments of the present utility model, a pressure sensor is provided on the mixing bin.

[0014] As some preferred embodiments of the present utility model, an output side fixing ring is provided on the front side of the mixing bin, and the distributor is connected to the output side fixing ring.

[0015] The beneficial effects of the utility model are:

[0016] 1. By adopting the design of the Venturi nozzle structure formed by the straight section and the inward section of the air inlet pipe, when the airflow is ejected through the inward section of the internal extension part, the flow velocity increases and the pressure decreases to form a negative pressure environment to suck the powder;

[0017] 2. The retracted section is located at the lower side of the feed port, so as to ensure that the airflow ejected from the retracted section can promptly receive the powder fed from the feeder before it is fully accelerated;

[0018] 3. Leave a gap between the straight section, the inward section and the inner wall of the mixing bin, so that the rear part outside the internal extension can cooperate with the Venturi nozzle structure to form a forward airflow, and the airflow sweeps the powder to ensure that the powder is fully merged into the airflow and injected into the distributor.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a three-dimensional diagram of the dry granulation feeding device of the utility model;

[0022] Figure 2 It is a three-dimensional diagram of the mixing bin in the utility model;

[0023] Figure 3 It is a left view of the mixing bin in the utility model;

[0024] Figure 4 It is a top view of the mixing bin in the utility model.

[0025] Reference numerals:

[0026] Mixing bin 100, feed port 110, feed port fixing ring 111, side protrusion 120, output side fixing ring 130, one-way valve 140, pressure sensor 150, side cover plate 160; air inlet pipe 200, external part 210, internal extension part 220, straight section 221, inward section 222, non-return ring 223; fan 300; distributor 400; feeder 500. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0029] In the description of the present utility model, the meaning of "a plurality" is more than two, and "greater than", "less than", "exceed" etc. are understood to exclude the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model, referring to Figure 1 One embodiment of the utility model provides a dry granulation feeding device, which is responsible for supplying powder to the dry granulation process of ceramic manufacturing.

[0032] Further, see Figure 2 The dry granulation feeding device of the utility model comprises a mixing bin 100, and the mixing bin 100 is located between the fan 300 and the distributor 400. The rear side of the mixing bin 100 is connected to the fan 300 as an input side, so that the airflow formed by the fan 300 can enter the mixing bin 100. The front side of the mixing bin 100 is connected to the distributor 400 as an output side. The structure and working principle of the fan 300 and the distributor 400 can refer to other ceramic granulation devices in the prior art, and will not be repeated here.

[0033] Further, refer to Figure 3 , Figure 4 The upper side of the mixing bin 100 serves as a feed port 110 , and a feeder 500 is disposed on the feed port 110 . The feeder 500 is responsible for delivering the powder from the feed port 110 into the mixing bin 100 .

[0034] Furthermore, the mixing chamber 100 and the fan 300 are connected via the air inlet pipe 200, which includes an external portion 210 and an internal extension portion 220. The external portion 210 is connected to the fan 300, and the internal extension portion 220 is located in the mixing chamber 100 and extends toward the front side. In this way, the airflow formed by the fan 300 is injected into the mixing chamber 100 through the external portion 210 and the internal extension portion 220 of the air inlet pipe 200 in sequence.

[0035] Furthermore, the internal extension part 220 includes a straight section 221 and a retracted section 222 in sequence, and the cross-sectional area of ​​the retracted section 222 perpendicular to the extension line decreases from the back to the front, forming a venturi-type nozzle structure for blowing. The retracted section 222 is located at the lower side of the feed port 110, so as to ensure that the airflow blown out by the above-mentioned venturi-type nozzle structure just intersects with the powder fed from the feeder 500. According to the Venturi effect, when the gas flows in the internal extension part 220 (Venturi tube) and reaches the retracted section 222 of the internal extension part 220, the dynamic pressure of the airflow reaches the maximum value, the static pressure reaches the minimum value, and the speed of the gas increases because the cross-sectional area (flow cross section) of the retracted section 222 of the internal extension part 220 perpendicular to the extension line decreases.

[0036] Furthermore, there is a gap between the straight section 221, the retracted section 222 and the inner wall of the mixing chamber 100, so that airflow can be formed between the inner extension part 220 and the inner wall of the mixing chamber 100. In the above-mentioned Venturi effect process, the entire airflow must undergo the pipe contraction process of the inner extension part 220 at the same time, so the pressure is also reduced at the same time. This process generates a pressure difference, and this pressure difference generates suction near the outside of the inner extension part 220. The above-mentioned design can ensure that this suction is large enough and stable.

[0037] In actual operation, after the fan 300 is started, the dry granulation feeding device of the utility model forms an airflow through the air inlet pipe 200 to enter the mixing bin 100, and at the same time, the feeder 500 is started to make the powder fall into the mixing bin 100 through the feed port 110.

[0038] When the airflow is ejected through the retracted section 222 of the internal extension part 220, the flow rate increases and the pressure decreases to form a negative pressure environment to suck the powder, and the retracted section 222 is located at the lower side of the feed port 110, so as to ensure that the airflow ejected from the retracted section 222 can promptly receive the powder fed from the feeder 500 before it is fully accelerated, and avoid the excessively fast airflow from forming a recoil so that the powder stays at the feed port 110 or even flows back into the feeder 500. There is a gap between the straight section 221, the retracted section 222 and the inner wall of the mixing bin 100, so as to ensure that the rear part outside the internal extension part 220 can cooperate with the Venturi nozzle structure to form a forward airflow, and the airflow sweeps the powder, ensuring that the powder is fully merged into the airflow and injected into the distributor 400.

[0039] This design ensures that when the feeding efficiency needs to be improved, by increasing the air volume of the fan 300 and the powder feed amount of the feeder 500, the formation of airflow backlash that affects the improvement of the feeding efficiency can be avoided, and the feeding efficiency of the subsequent distributor 400 can also be improved.

[0040] In some embodiments, a non-return ring 223 is provided on the retracted section 222 to prevent the powder from being drawn into the air inlet pipe 200 when falling on the output end of the retracted section 222, so as to ensure the hygienic cleanliness of the air inlet pipe 200. Since the non-return ring 223 only needs to prevent the powder from entering the retracted section 222 along the retracted section 222, the size of the non-return ring 223 does not need to be very long, and is specifically determined according to the model and size requirements of the dry granulation feeding device of the utility model. In addition, the non-return ring 223 can also strengthen the structural strength of the position of the retracted section 222.

[0041] In this embodiment, optionally, the backstop ring 223 is in the shape of a right cylinder.

[0042] Some embodiments, see Figure 2The mixing bin 100 is provided with side protrusions 120 on the left and right sides, which not only expand the volume of the mixing bin 100 to increase the amount of powder entering, but also make it easier for the rear side of the mixing bin 100 to form a forward airflow to push the powder into the distributor 400.

[0043] In this embodiment, refer to Figure 4 Optionally, the side protrusion 120 is an arc-shaped surface protruding toward the left and right sides of the mixing bin 100 .

[0044] In this embodiment, optionally, the side protrusion 120 is a triangular surface protruding toward the left and right sides of the mixing bin 100 .

[0045] In some embodiments, the feed opening 110 is circular, and the edge of the feed opening 110 is tangent to the inner wall of the side protrusion 120, which fully improves the powder feeding efficiency.

[0046] Some embodiments, see Figure 3 , Figure 4 A feed port fixing ring 111 is provided on the feed port 110 , and the feeder 500 is connected to the feed port fixing ring 111 , so as to facilitate the fixed connection between the feeder 500 and the mixing bin 100 .

[0047] In this embodiment, optionally, the feeder 500 is connected to the feed port fixing ring 111 by screws.

[0048] Some embodiments, see Figure 1 The mixing bin 100 is provided with a side opening on the side, and a detachable side cover 160 is provided on the side opening. After opening the side cover 160, the mixing bin 100 can be inspected and repaired without disassembling the mixing bin 100 or the feeder 500.

[0049] In some embodiments, the side opening is connected to a supply air fan as an air supply port, that is, air flow can be injected into the side opening through the supply air fan for supply air as needed, further preventing the phenomenon of material blockage or backwash at the inlet of the Venturi tube.

[0050] In this embodiment, optionally, the side openings are located at the rear sides of the left and right sides of the mixing bin 100 .

[0051] Some embodiments, see Figure 2 A one-way valve 140 is provided between the external part 210 and the mixing bin 100. When the fan 300 is turned on, the airflow is injected into the mixing bin 100 through the one-way valve 140. The design of the one-way valve 140 can prevent the powder from flowing back into the fan.

[0052] In some embodiments, a pressure sensor 150 is provided on the mixing bin 100 to detect the operating status in the mixing bin 100 and cooperate with the one-way valve 140 to control the switch to purge the powder in the mixing bin 100. Once the pressure sensor 150 detects that the pressure in the mixing bin 100 is abnormal, it often means that there is a problem with the fan, feeder or other parts, and a signal can be transmitted to instruct the one-way valve 140 to close or even shut down the entire machine.

[0053] In some embodiments, an output side fixing ring 130 is provided on the front side of the mixing bin 100 , and the distributor 400 is connected to the output side fixing ring 130 , so as to facilitate the fixed connection between the distributor 400 and the mixing bin 100 .

[0054] In this embodiment, optionally, the distributor 400 is connected to the output-side fixing ring 130 by screws.

[0055] In the description of this specification, the description with reference to the terms "some embodiments" or "it is conceivable that" 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.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dry granulation feeding device, comprising a mixing bin (100), wherein the mixing bin (100) is located between a fan (300) and a distributor (400), wherein the rear side of the mixing bin (100) is connected to the fan (300) as an input side, and the front side of the mixing bin (100) is connected to the distributor (400) as an output side, wherein: The upper side of the mixing bin (100) serves as a feed port (110), and a feeder (500) is disposed on the feed port (110); The mixing chamber (100) is connected to the fan (300) via an air inlet pipe (200), wherein the air inlet pipe (200) comprises an external connection portion (210) and an internal extension portion (220), wherein the external connection portion (210) is connected to the fan (300), and the internal extension portion (220) is located in the mixing chamber (100) and extends toward the front side; The inner extension portion (220) includes a straight line segment (221) and an inwardly contracted segment (222) in sequence, wherein the cross-sectional area of ​​the inwardly contracted segment (222) perpendicular to the extension line decreases from the back to the front, and the inwardly contracted segment (222) is located at the lower side of the feed port (110); A gap is left between the straight section (221), the inwardly contracted section (222) and the inner wall of the mixing chamber (100).

2. A dry granulation feeding device according to claim 1, characterized in that: The retracted section (222) is provided with a non-return ring (223).

3. A dry granulation feeding device according to claim 1, characterized in that: The mixing bin (100) is provided with side protrusions (120) on the left and right sides.

4. A dry granulation feeding device according to claim 3, characterized in that: The feed opening (110) is circular in shape, and the edge of the feed opening (110) is tangent to the inner wall of the side protrusion (120).

5. A dry granulation feeding device according to claim 1, characterized in that: The feed port (110) is provided with a feed port fixing ring (111), and the feeder (500) is connected to the feed port fixing ring (111).

6. A dry granulation feeding device according to claim 1, characterized in that: The mixing bin (100) is provided with a side opening on its side, and a detachable side cover plate (160) is provided on the side opening.

7. A dry granulation feeding device according to claim 6, characterized in that: The side opening is used as an air supply port to connect to the air supply fan.

8. A dry granulation feeding device according to claim 1, characterized in that: A one-way valve (140) is provided between the external portion (210) and the mixing chamber (100).

9. A dry granulation feeding device according to claim 1, characterized in that: The mixing bin (100) is provided with a pressure sensor (150).

10. A dry granulation feeding device according to claim 1, characterized in that: An output side fixing ring (130) is provided at the front side of the mixing bin (100), and the distributor (400) is connected to the output side fixing ring (130).

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