Discharging dust removal device capable of reducing scale suction influence of negative pressure scale

Abstract

The utility model relates to an unloading dust removal device capable of reducing the scale suction influence of a negative pressure scale, which comprises a bracket, a weighing hopper arranged on the bracket through a weighing sensor, a bag filter arranged on the weighing hopper, a powder inlet arranged at the upper end of the side wall of the weighing hopper, a powder unloading hopper arranged at the lower end of the weighing hopper, a powder unloading port arranged at the bottom of the powder unloading hopper, and an L-shaped pipeline connected with the bag filter, a horizontal pipe of the L-shaped pipeline is lower than the weighing sensor, the end part of the horizontal pipe of the L-shaped pipeline is connected with a secondary filter through a flexible connecting pipe and a conveying pipeline, and the secondary filter is connected with a Roots blower through a communicating pipeline. A plurality of filter bags are mounted in the bag filter through a mounting plate, a top cover and an air inducing port are arranged at the top of the bag filter, and the L-shaped pipeline is connected with the air inducing port. According to the utility model, the hard L-shaped pipeline is firstly connected to the air suction port of the bag filter, and then the flexible connection pipe is connected to the position lower than the weighing sensor, so that on one hand, the connection mode of flexible connection is ensured, on the other hand, the weighing sensor can be prevented from being greatly influenced, and the weighing accuracy is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of negative pressure weighing devices, and in particular to a material unloading and dust removal device that reduces the impact of suction on negative pressure weighing devices. Background Technology

[0002] During the unloading process, a bag filter is connected to the top of the weighing hopper to filter out dust during the unloading process. Normally, the air inlet on the top cover of the bag filter must be connected to the Roots blower via a flexible connection. However, this setting will cause the flexible connection to tighten due to negative pressure when the Roots blower is started, thus causing the scale to be sucked in. The basic data of the weighing hopper will change due to the suction of the Roots blower, resulting in poor measurement accuracy. Utility Model Content

[0003] This utility model aims to address the shortcomings of existing technologies by providing a material unloading and dust removal device that reduces the impact of negative pressure scale suction.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] A dust removal device for reducing the impact of negative pressure scale suction includes a support frame, a weighing hopper mounted on the support frame via a weighing sensor, a bag filter mounted on the weighing hopper, a powder inlet at the upper end of the side wall of the weighing hopper, a powder discharge hopper at the lower end of the weighing hopper, a powder discharge outlet at the bottom of the powder discharge hopper, an L-shaped pipe connected to the bag filter, the horizontal pipe of the L-shaped pipe being lower than the weighing sensor, a secondary filter connected to the end of the horizontal pipe of the L-shaped pipe via a flexible connecting pipe and a conveying pipe, and a Roots blower connected to the secondary filter via a connecting pipe.

[0006] Several filter bags are installed inside the bag filter via an mounting plate. The top of the bag filter is equipped with a top cover, and an air inlet is provided on the top cover. An L-shaped pipe is connected to the air inlet.

[0007] A pressure reducing valve and an oil mist pressure reducing valve are connected to the outside of the powder unloading hopper via pipes.

[0008] A butterfly valve is installed at the powder discharge port.

[0009] A pressure-reducing and air-replenishing valve is installed on the connecting pipeline.

[0010] The beneficial effects of this invention are as follows: This invention employs a rigid L-shaped pipe connected first at the air inlet of the bag filter, and then a flexible connecting pipe connected at a position lower than the weighing sensor. This ensures the use of a flexible connection method and avoids significant impact on the weighing sensor, thus guaranteeing weighing accuracy. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] In the diagram: 1-Support; 2-Weighing sensor; 3-Weighing hopper; 4-Bag filter; 5-Powder inlet; 6-Powder discharge hopper; 7-Powder discharge port; 8-L-shaped pipe; 9-Flexible connection pipe; 10-Conveying pipe; 11-Secondary filter; 12-Connecting pipe; 13-Roots blower; 14-Side plate; 15-Horizontal plate; 16-Reinforcing angle plate; 17-Top cover; 18-Air outlet; 19-Pressure reducing valve; 20-Oil mist pressure reducing valve; 21-Butterfly valve; 22-Arch breaking air filter element; 23-Pressure reducing and replenishing air valve;

[0013] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0014] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0015] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] A dust removal device for reducing the impact of negative pressure scale suction, such as Figure 1As shown, it includes a bracket 1, a weighing sensor 2, a weighing hopper 3, a bag filter 4, a powder inlet 5, a powder discharge hopper 6, a powder discharge port 7, an L-shaped pipe 8, a flexible connecting pipe 9, a conveying pipe 10, a secondary filter 11, a connecting pipe 12, a Roots blower 13, a side plate 14, a horizontal plate 15, a reinforcing angle plate 16, a top cover 17, an air inlet 18, a pressure reducing valve 19, an oil mist pressure reducing valve 20, a butterfly valve 21, an arch-breaking air filter element 22, and a pressure reducing and replenishing air valve 23.

[0019] A weighing hopper 3 is installed on the support 1 via a weighing sensor 2. A bag filter 4 is installed on the weighing hopper 3. A powder inlet 5 is provided at the upper end of the side wall of the weighing hopper 3. A powder discharge hopper 6 is provided at the lower end of the weighing hopper 3. A powder discharge port 7 is provided at the bottom of the powder discharge hopper 6. The bag filter 4 is connected to an L-shaped pipe 8. The horizontal pipe of the L-shaped pipe 8 is lower than the weighing sensor 2. The end of the horizontal pipe of the L-shaped pipe 8 is connected to a secondary filter 11 via a flexible connecting pipe 9 and a conveying pipe 10. The secondary filter 11 is connected to a Roots blower 13 via a connecting pipe 12.

[0020] Side plates 14 are welded to the side wall of the weighing hopper 3. A horizontal plate 15 is welded to the outside of the side plate 14. The horizontal plate 15 is supported and connected to the weighing sensor 2. The weighing sensor 2 is supported on the bracket 1. Several reinforcing corner plates 16 are provided between the side plate 14 and the horizontal plate 15.

[0021] Several filter bags are installed inside the bag filter 4 via an mounting plate. The top of the bag filter 4 is provided with a top cover 17, and an air inlet 18 is provided on the top cover 17. An L-shaped pipe 8 is connected to the air inlet 18.

[0022] The powder unloading hopper 6 is connected to a pressure reducing valve 19 and an oil mist pressure reducing valve 20 via pipes on its side wall.

[0023] A butterfly valve 21 is installed at the powder discharge port 7.

[0024] The powder unloading hopper 6 is equipped with several anti-bridging air filters 22, which can break up the arches of the materials.

[0025] A pressure-reducing gas supply valve 23 is installed on the connecting pipe 12.

[0026] This invention employs a rigid L-shaped pipe 8 first connected to the air inlet 18 of the bag filter 4, and then a flexible connecting pipe 9 connected to a position lower than the weighing sensor 2. This ensures the use of a flexible connection method and avoids significant impact on the weighing sensor, thus guaranteeing weighing accuracy. Weighing is performed using a combination of fast weighing, slow weighing, and jogging, achieving an accuracy of 100 grams and a pass rate of approximately 90%.

[0027] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A dust removal device for reducing the effect of negative pressure suction of a scale, characterized in that, The utility model relates to a kind of powder conveying device, including support (1), weighing sensor (2) is installed on support (1) by weighing sensor (2) installation weighing hopper (3), bag filter (4) is equipped on weighing hopper (3), the upper end of the side wall of weighing hopper (3) is equipped with powder inlet (5), the lower end of weighing hopper (3) is equipped with unloading hopper (6), unloading hopper (6) bottom is equipped with unloading port (7), bag filter (4) is connected with L-shaped pipeline (8), the horizontal pipe of L-shaped pipeline (8) is lower than weighing sensor (2), the horizontal pipe end of L-shaped pipeline (8) is connected with secondary filter (11) by soft connecting pipe (9), conveying pipeline (10), secondary filter (11) is connected with Roots blower (13) by communication pipeline (12).

2. The unloading dust removal device for reducing the influence of negative pressure scale suction according to claim 1, characterized in that, Side plate (14) is welded on the side wall of weighing hopper (3), horizontal plate (15) is welded outside side plate (14), horizontal plate (15) is supported and connected on weighing sensor (2), weighing sensor (2) is supported on support (1), and there are several reinforcing angle plates (16) between side plate (14) and horizontal plate (15).

3. The dust removal device for reducing the influence of negative pressure suction scale according to claim 2, characterized in that, Several filter bags are installed in bag filter (4) by mounting plate, top cover (17) is equipped on the top of bag filter (4), air inlet (18) is equipped on top cover (17), L-shaped pipeline (8) is connected with air inlet (18).

4. The dust removal device for reducing the influence of negative pressure suction scale according to claim 3, characterized in that, Pressure reducing valve (19), oil mist pressure reducing valve (20) are connected by pipeline outside the side wall of unloading hopper (6).

5. The dust removal device for reducing the influence of negative pressure suction scale according to claim 4, characterized in that, Butterfly valve (21) is installed at unloading port (7).

6. The dust removal device for reducing the influence of negative pressure suction scale according to claim 5, characterized in that, Several arch-breaking air filter elements (22) are installed in unloading hopper (6).

7. The dust removal device for reducing the effect of suction of the negative pressure scale according to claim 6, characterized in that, Pressure reducing air supply valve (23) is equipped on communication pipeline (12).

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