Negative pressure feeding mechanism

Abstract

The utility model relates to the technical field of drying machines, in particular to a negative-pressure feeding mechanism which comprises a first storage bin and a second storage bin arranged at the bottom end of the first storage bin, a second discharging valve is arranged between the first storage bin and the second storage bin, a feeding port is formed in the bottom end of the second storage bin and communicated with an equipment main machine, and the first discharging valve and the second discharging valve are arranged in the first storage bin. A first discharging valve is arranged between the feeding port and the second storage bin, an air supplementing valve used for supplementing air into the second storage bin is arranged on the second storage bin, the second storage bin is connected with the equipment main machine through a connecting pipe, and a gas phase balance valve is arranged on the connecting pipe. The air pressure adjusting device is used for adjusting the air pressure in the second storage bin to be consistent with the equipment main machine, materials can be fed into the equipment main machine under the condition that the negative pressure is kept in the equipment main machine, energy consumption is reduced, energy conservation and environmental protection are better achieved, and meanwhile material pollution is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding mechanisms, in particular to a negative pressure feeding mechanism. Background Art

[0002] Some equipment needs to maintain negative pressure inside the equipment when working. For example, in a hollow paddle dryer, under positive pressure, the required drying temperature is high, exceeding 100°C to convert the moisture in the material into steam. Under negative pressure, the material will produce steam at 70°C to 80°C. Therefore, in order to reduce energy consumption, the inside of the dryer is generally set to negative pressure.

[0003] The existing dryer feeding mechanism generally directly sets a storage bin and a valve to control the opening and closing of the storage bin on the dryer main unit. On the one hand, the interior of the equipment is in a negative pressure state, and the valve is not easy to open. On the other hand, during the feeding process, outside air can easily enter the interior of the dryer main unit, causing the internal air pressure to increase and increase energy consumption. At the same time, outside air entering the dryer may cause material contamination. Summary of the invention

[0004] The purpose of the utility model is to provide a negative pressure feeding mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a negative pressure feeding mechanism, comprising a first storage bin and a second storage bin arranged at the bottom of the first storage bin, and a second unloading valve is arranged between the first storage bin and the second storage bin, a feeding port is arranged at the bottom of the second storage bin, and the feeding port is connected to the main unit of the equipment, a first unloading valve is arranged between the feeding port and the second storage bin, an air supply valve for supplying air to the interior of the second storage bin is arranged on the second storage bin, the second storage bin is connected to the main unit of the equipment via a connecting pipe, and a gas phase balance valve is arranged on the conduit, which is used to adjust the air pressure inside the second storage bin to be consistent with that of the main unit of the equipment.

[0006] Furthermore, the first discharge valve and the second discharge valve may specifically be ball valves.

[0007] Furthermore, an opening is arranged at the top of the first storage bin, and a sealing cover is arranged at the opening which can be opened and closed.

[0008] Furthermore, a plurality of rapping air hammers are provided on the side walls of the first storage bin and the second storage bin for knocking down materials adhering to the inner side walls of the first storage bin and the second storage bin.

[0009] Compared with the prior art, the beneficial effect of the utility model is that the negative pressure feeding mechanism can add material to the interior of the equipment while maintaining a negative pressure inside the main unit by setting a first storage bin, a second storage bin, a feeding port, a first discharge valve, a second discharge valve, a gas phase balance valve and an air supply valve, which is more energy-saving and environmentally friendly and avoids material pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0011] In the figure: 1. first storage bin; 101. sealing cover; 2. second storage bin; 3. feeding port; 4. first discharge valve; 5. second discharge valve; 6. gas phase balance valve; 7. air supply valve; 8. vibrating air hammer. DETAILED DESCRIPTION

[0012] 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. In the description of the utility model, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In order to make the terms "including" and any variations of them in the specification and claims of the utility model and the above-mentioned drawings, it is intended to cover non-exclusive inclusions.

[0013] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does 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 utility model.

[0014] See also Figure 1The utility model provides an embodiment: a negative pressure feeding mechanism, comprising a first storage bin 1 and a second storage bin 2 arranged at the bottom of the first storage bin 1, the top of the first storage bin 1 is provided with an opening, and a sealing cover 101 can be opened and closed at the opening, the first storage bin 1 is used to store materials, and the sealing cover 101 is used to seal the opening to prevent the materials from being contaminated;

[0015] A plurality of rapping air hammers 8 are provided on the side walls of the first storage bin 1 and the second storage bin 2, which are used to knock down the materials adhering to the inner side walls of the first storage bin 1 and the second storage bin 2. The specific structure of the rapping air hammer 8 is prior art and will not be described in detail here. Two rapping air hammers 8 are provided on the outer side walls of the first storage bin 1 and the second storage bin 2. When the materials are adhered to the inner side walls of the first storage bin 1 and the second storage bin 2, they can be knocked to make them fall off;

[0016] A second discharge valve 5 is provided between the first storage bin 1 and the second storage bin 2, and the second discharge valve 5 is used to control whether the first storage bin 1 and the second storage bin 2 are connected. A feeding port 3 is provided at the bottom of the second storage bin 2, and the feeding port 3 is connected to the main device of the equipment. In this embodiment, the main device of the equipment is a vacuum paddle dryer (not shown in the figure), and the feeding mechanism can also be installed on other equipment with negative pressure inside as needed to add materials to the inside of the equipment. A first discharge valve 4 is provided between the feeding port 3 and the second storage bin 2, and the first discharge valve 4 is used to control whether the feeding port 3 is connected to the second storage bin 2. A useful The air supply valve 7 for supplying air to the inside of the second storage bin 2, in this embodiment, nitrogen can be added to the inside of the second storage bin 2 to increase the internal air pressure of the second storage bin 2. During the working process, the inside of the second storage bin 2 is in a negative pressure state, and the first storage bin 1 is the same as the external atmospheric pressure. Therefore, only by supplying air to the inside of the second storage bin 2 can the second discharge valve 5 be opened. The second storage bin 2 is connected to the main machine of the equipment through a connecting pipe, and a gas phase balance valve 6 is provided on the conduit, which is used to adjust the air pressure inside the second storage bin 2 to be consistent with that of the main machine of the equipment. Similarly, the first discharge valve can be opened only when the air pressure inside the second storage bin 2 is the same as that inside the main machine of the equipment;

[0017] The first discharge valve 4 and the second discharge valve 5 can be specifically ball valves, and can also be set as other valves as needed.

[0018] Working principle: the feeding mechanism is fixed on the top of the main machine of the equipment, and the feeding port 3 is connected with the inside of the main machine of the equipment. When working, nitrogen is first added to the inside of the second storage bin 2 through the air supply valve 7 to increase the internal air pressure of the second storage bin 2 and balance it with the internal air pressure of the first storage bin 1. Then, the second unloading valve 5 is opened to allow the material inside the first storage bin 1 to enter the inside of the second storage bin 2, and then the second unloading valve 5 is closed, and the gas phase balance valve 6 is opened to balance the air pressure inside the second storage bin 2 and the main machine of the equipment, and then the first unloading valve 4 is opened to allow the material inside the second storage bin 2 to enter the inside of the main machine of the equipment, so that the inside of the main machine of the equipment is always kept in a negative pressure state to reduce the energy effect.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. Negative pressure feeding mechanism, characterized by: The invention comprises a first material storage bin (1) and a second material storage bin (2) arranged at the bottom of the first material storage bin (1), and a second discharge valve (5) is arranged between the first material storage bin (1) and the second material storage bin (2), a feeding port (3) is arranged at the bottom of the second material storage bin (2), and the feeding port (3) is connected to the feeding port of the main machine of the equipment, a first discharge valve (4) is arranged between the feeding port (3) and the second material storage bin (2), an air supply valve (7) for supplying air to the inside of the second material storage bin (2) is arranged on the second material storage bin (2), the second material storage bin (2) is connected to the main machine of the equipment via a connecting pipe, and a gas phase balance valve (6) is arranged on the conduit for adjusting the air pressure inside the second material storage bin (2) to be consistent with the main machine of the equipment.

2. The negative pressure feeding mechanism according to claim 1, characterized in that: The first discharge valve (4) and the second discharge valve (5) are specifically ball valves.

3. The negative pressure feeding mechanism according to claim 1, characterized in that: The top of the first material storage bin (1) is provided with an opening, and a sealing cover (101) is provided at the opening which can be opened and closed.

4. The negative pressure feeding mechanism according to claim 1, characterized in that: A plurality of rapping air hammers (8) are provided on the side walls of the first storage bin (1) and the second storage bin (2) for knocking off materials adhered to the inner side walls of the first storage bin (1) and the second storage bin (2).

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