Air-film arch-breaking and blockage-clearing structure and hopper

Abstract

This utility model discloses an air-film anti-arching and anti-clogging structure, relating to the field of hopper anti-clogging technology. It includes an air supply pipe and an air blowing assembly. The air blowing assembly can be installed on the hopper wall and is connected to the air supply pipe. The air supply pipe includes branch pipes and a main pipe, the main pipe being connected to an air source for air supply. Multiple branch pipes are connected to the main pipe, and each branch pipe is connected to the air blowing assembly. The air blowing assemblies on the branch pipes generate a downward rotating airflow to purge the material in the hopper. This utility model also provides a hopper including the air-film anti-arching and anti-clogging structure described above. This utility model can improve the anti-clogging effect and prevent hopper blockage.

Description

Technical Field

[0001] This utility model relates to the field of hopper unblocking technology, and in particular to an air film arch breaking and unblocking structure and hopper. Background Technology

[0002] Currently, hoppers often experience blockages due to damp materials or other reasons, such as materials sticking to the walls, arching, or becoming clogged. To clear these blockages, an air blowing mechanism is installed on the hopper wall to blow air into the hopper.

[0003] However, the existing air blowing mechanism only blows air into the coal hopper, and the direction of air blowing cannot be controlled, resulting in poor unblocking effect.

[0004] Therefore, an air-film arch-breaking and blockage-clearing structure and hopper are provided to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide an air-film arch-breaking and blockage-clearing structure and hopper to solve the problems existing in the prior art, improve the blockage-clearing effect, and avoid hopper blockage.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides an air-film arch-breaking and blockage-clearing structure, including an air supply pipe and an air blowing assembly. The air blowing assembly can be installed on the hopper wall and is connected to the air supply pipe. The air supply pipe includes air supply branch pipes and an air supply main pipe. The air supply main pipe is used to connect to an air source for air supply. Multiple air supply branch pipes are connected to the air supply main pipe, and the air blowing assembly is connected to any one of the air supply branch pipes. The air blowing assemblies on the multiple air supply branch pipes can generate a rotating downward airflow to blow away the material in the hopper.

[0008] Preferably, the main air supply pipe is an annular air supply pipe, which can be arranged around the hopper, and multiple air supply branch pipes are arranged at intervals on the main air supply pipe, and any one of the air supply branch pipes is arranged along the height direction of the hopper.

[0009] Preferably, the gas supply branch pipe is provided above and / or below the main gas supply pipe.

[0010] Preferably, the air blowing assembly includes a first air blowing structure and a second air blowing structure, both of which are connected to the air supply branch pipe. The air outlet of the first air blowing structure is downward, and the air outlet of the second air blowing structure is inclined downward or horizontally arranged.

[0011] Preferably, the air outlet of the first blowing structure is a flat air outlet, which is positioned downwards.

[0012] Preferably, the first air blowing structure includes a nozzle housing, a gas channel is provided inside the nozzle housing, an air inlet is provided on the outer side of the nozzle housing, the air inlet is connected to the gas channel and is connected to the air supply branch pipe, an air outlet is provided at the bottom of the nozzle housing, the air outlet is connected to the gas channel, and the inner side of the nozzle housing is flush with the inner wall of the hopper.

[0013] Preferably, the nozzle housing includes an outer plate, a middle plate, and an inner plate arranged sequentially from the outside to the inside. The outer plate has an air inlet, and the bottom of the middle plate has an opening corresponding to the air inlet, so that a gas channel is formed between the outer plate and the inner plate, and the gas channel communicates with the air inlet. The bottom of the inner plate, the bottom of the middle plate, and the outer plate together form the air outlet.

[0014] The inner side of the inner layer plate is flush with the inner wall of the hopper, and the bottom of the outer layer plate is fixed to the hopper, with the bottom inner side of the outer layer plate flush with the inner wall of the hopper.

[0015] Preferably, the second air blowing structure includes an air jet pipe, the air outlet of which is inclined downward or horizontally arranged, and the air outlet is flush with the inner wall of the hopper.

[0016] Preferably, both the first air blowing structure and the second air blowing structure are connected to the air supply branch pipe via an electronically controlled valve;

[0017] The electrically controlled valve is a pulse valve, and the air source includes a compressed air tank for storing high-pressure air. The high-pressure air generates pulse waves through the pulse valve.

[0018] This utility model also provides a hopper, including the air film arch breaking and blockage clearing structure as described above.

[0019] The present invention achieves the following technical advantages over the prior art:

[0020] This utility model's air-film arch-breaking and blockage-clearing structure mainly includes an air supply pipe and an air blowing assembly. The air blowing assembly can be installed on the hopper wall and is connected to the air supply pipe. The air supply pipe includes air supply branch pipes and an air supply main pipe. The air supply main pipe is used to connect to an air source for air supply. Multiple air supply branch pipes are connected to the air supply main pipe, and each air supply branch pipe is connected to the air blowing assembly. The air blowing assemblies on the multiple air supply branch pipes can generate a rotating downward airflow to blow away the material in the hopper.

[0021] In this invention, the air-blowing components on multiple air supply branches generate a downward rotating airflow, forming a spiral trajectory (similar to a tornado effect). This can simultaneously cover the accumulated material in the central area of ​​the hopper and near the side walls. The downward component of the airflow can push the material to fall vertically, while the tangential component peels off the adhesive layer attached to the hopper wall, improving the unblocking effect. The vortex generated by the rotation can also keep the falling material evenly dispersed, avoiding local accumulation and secondary blockage. Moreover, the centrifugal force generated by the rotation causes the airflow to exert a continuous shearing effect on the material, effectively destroying the arched structure (mechanical arch / adhesive arch) formed by the material due to humidity, static electricity, etc., which is significantly better than unidirectional airflow. Furthermore, the spiral airflow path extends the aerodynamic action distance, making it less prone to attenuation compared to direct jet flow, significantly reducing energy consumption. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the air film arch-breaking and blockage-clearing structure in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of another air-film arch-breaking and blockage-clearing structure in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the first air-blowing structure in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram showing the fit between the middle plate and the outer plate of the first air-blowing structure in an embodiment of this utility model.

[0027] In the figure: 1-first air blowing structure, 101-outer plate, 102-middle plate, 103-inner plate, 104-air inlet, 105-opening, 106-air inlet pipe, 2-second air blowing structure, 3-main air supply pipe, 4-branch air supply pipe, 5-hopper wall, 6-air source. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The purpose of this invention is to provide an air-film arch-breaking and blockage-clearing structure and hopper to solve the problems existing in the prior art, improve the blockage-clearing effect, and avoid hopper blockage.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figures 1-4 As shown, this embodiment provides an air-film arch-breaking and blockage-clearing structure, mainly including an air supply pipe and an air blowing assembly. The air blowing assembly can be installed on the hopper wall 5 and is connected to the air supply pipe. The air supply pipe includes air supply branch pipes 4 and air supply main pipe 3. The air supply main pipe 3 is used to connect to an air source 6 for air supply. Multiple air supply branch pipes 4 are connected to the air supply main pipe 3, and the air blowing assembly is connected to any one of the air supply branch pipes 4. The air blowing assembly on the multiple air supply branch pipes 4 can generate a rotating downward airflow to blow away the material in the hopper.

[0033] In this embodiment, the air blowing components on the multiple air supply branch pipes 4 can generate a rotating downward airflow, forming a spiral motion trajectory (similar to a tornado effect). This can simultaneously cover the accumulated material in the central area of ​​the hopper and near the side walls. The downward component of the airflow can push the material to fall vertically, while the tangential component peels off the adhesive layer attached to the hopper wall 5, improving the unblocking effect. The vortex generated by the rotation can also keep the falling material in a uniformly dispersed state, avoiding local accumulation and secondary blockage. Moreover, the centrifugal force generated by the rotation causes the airflow to form a continuous shearing action on the material, effectively destroying the arched structure (mechanical arch / adhesive arch) formed by the material due to humidity, static electricity, etc., which is significantly better than unidirectional airflow. Furthermore, the spiral airflow path extends the aerodynamic action distance, making it less prone to attenuation compared to direct jet flow, significantly reducing energy consumption.

[0034] It should be further explained that the hopper can be a raw coal hopper used in coal-fired power plants to transport raw coal, or it can be used as a hopper for other materials as needed, such as a hopper for transporting building materials such as cement, or a hopper for transporting grain, etc., and is not limited to raw coal hoppers.

[0035] In this embodiment, the main gas supply pipe 3 can be an annular gas supply pipe, which can be arranged around the hopper. Multiple gas supply branch pipes 4 are spaced apart on the main gas supply pipe 3, and any one of the gas supply branch pipes 4 is arranged along the height direction of the hopper, that is, arranged from top to bottom or from bottom to top along the hopper.

[0036] In this embodiment, the gas supply branch pipe 4 is provided above and / or below the main gas supply pipe 3, for example, as shown in the example. Figure 1 As shown, a gas supply branch pipe 4 is provided only below the main gas supply pipe 3; or, as... Figure 2 As shown, gas supply branch pipes 4 are provided above and below the main gas supply pipe 3.

[0037] In this embodiment, as Figure 1 and Figure 2 As shown, the air-blowing assembly mainly includes a first air-blowing structure 1 and a second air-blowing structure 2. Both the first air-blowing structure 1 and the second air-blowing structure 2 are connected to the air supply branch pipe 4. The air outlet of the first air-blowing structure 1 is downward (this downward setting can be inclined downward or vertically downward, preferably vertically downward), and the air outlet of the second air-blowing structure 2 is inclined downward or horizontally (preferably inclined downward). In this embodiment, the first air-blowing structure 1 and the second air-blowing structure 2 on multiple air supply branch pipes 4 work together to generate a rotating downward airflow.

[0038] In this embodiment, the first air blowing structure 1 and the second air blowing structure 2 of the same air blowing assembly are respectively disposed on both sides of the air supply branch pipe 4; and multiple layers of the air blowing assembly are disposed at intervals along the length direction of any one of the air supply branch pipes 4, and the first air blowing structure 1 and the second air blowing structure 2 of adjacent layers of the air blowing assembly are disposed in opposite positions.

[0039] In this embodiment, the air outlet of the first blowing structure 1 is preferably a flat air outlet, which is set downwards. The use of a flat air outlet in this embodiment makes the air outlet more uniform and improves the unblocking effect. Moreover, the flat air outlet can be a fan-shaped air outlet or a cone-shaped air outlet that is narrow at the top and wide at the bottom, so that the airflow can diffuse downwards, increase the range of action, and further improve the unblocking effect. Alternatively, other shapes of air outlets can be selected according to the working needs.

[0040] In this embodiment, the first air blowing structure 1 mainly includes a nozzle housing, a gas channel is provided inside the nozzle housing, an air inlet 104 is provided on the outer side of the nozzle housing, the air inlet 104 is connected to the gas channel, and the air inlet 104 is connected to the air supply branch pipe 4 through an air inlet pipe 106. The air outlet is provided at the bottom of the nozzle housing, and the air outlet is connected to the gas channel. The inner side of the nozzle housing is flush with the inner wall of the hopper, which can avoid protruding from the inner wall of the hopper and affecting the material discharge effect.

[0041] In this embodiment, the nozzle housing can be integrally formed.

[0042] Alternatively, in a preferred embodiment, the nozzle housing may include an outer layer plate 101, a middle plate 102, and an inner layer plate 103 arranged sequentially from the outside to the inside. The outer layer plate 101 has an air inlet 104, and the bottom of the middle plate 102 has an opening 105 corresponding to the air inlet 104, thus forming a gas channel between the outer layer plate 101 and the inner layer plate 103, and the gas channel communicates with the air inlet 104. The bottom of the inner layer plate 103, the bottom of the middle plate 102, and the outer layer plate 101 together form the air outlet. In this embodiment, the nozzle housing includes an outer layer plate 101, a middle plate 102, and an inner layer plate 103, which can be directly welded to form the nozzle housing, resulting in a simple structure and low manufacturing cost. The material of the nozzle housing can be selected according to specific needs, for example, stainless steel or copper.

[0043] Furthermore, in this embodiment, the inner side of the inner plate 103 is flush with the inner wall of the hopper, and the bottom of the outer plate 101 is fixed to the hopper, with the bottom inner side of the outer plate 101 also flush with the inner wall of the hopper. With this arrangement, both the inner plate 103 and the outer plate 101 can be connected to the hopper (specifically, by welding), improving the connection strength. Moreover, the inner side of the inner plate 103 and the bottom inner side of the outer plate 101 are flush with the inner wall of the hopper, avoiding the impact of protruding structures on the material falling. Furthermore, the bottom of the outer plate 101 is located below the air outlet, so the air is first sprayed onto the outer plate 101 and flows along it, avoiding long-term direct blowing onto the hopper sidewall and preventing damage to the hopper.

[0044] In this embodiment, the second air blowing structure 2 includes a jet pipe. The air inlet of the jet pipe is connected to the air supply branch pipe 4 through an air inlet pipe 106. The air outlet of the jet pipe is inclined downward or horizontally (preferably inclined downward), and the air outlet is flush with the inner wall of the hopper. The inclination angle of the air outlet can be 15°-45°, which can apply a downward thrust along the inner wall of the hopper to the material, helping the material overcome friction and slide down, improving the unblocking effect, and avoiding the problem that if the inclination angle is too small, the airflow direction is too parallel to the inner wall of the hopper, resulting in insufficient thrust and difficulty in effectively pushing the material. In this embodiment, the air outlet of the jet pipe can be elliptical, elongated, or other shapes.

[0045] In this embodiment, both the first air blowing structure 1 and the second air blowing structure 2 are connected to the air supply branch pipe 4 via an electrically controlled valve. The electrically controlled valve can realize individual control of each of the first air blowing structure 1 and the second air blowing structure 2. Alternatively, a manual valve can be provided on the air inlet pipe 106 of the first air blowing structure 1 and the second air blowing structure 2 to facilitate manual control in case of electric valve failure or other special circumstances.

[0046] In this embodiment, the electronically controlled valve can be selected according to specific working needs, such as a pulse valve or a conventional solenoid valve, preferably a pulse valve; the air source 6 can be selected according to specific working needs, preferably a compressed air tank, the air outlet of the compressed air tank is connected to the main air supply pipe 3, and the compressed air tank can provide high-pressure gas to achieve high-pressure purging and improve the unblocking effect.

[0047] In this embodiment, the top of the compressed air tank is equipped with a pressure relief valve (pressure relief pressure ≤ 1.1 times the rated pressure) to ensure safety, and the bottom of the compressed air tank is equipped with a drain valve for daily sewage discharge.

[0048] This embodiment also provides a hopper, including the air film arch breaking and blockage clearing structure described above.

[0049] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gas-film arch-breaking and blockage-clearing structure, characterized in that: The device includes an air supply pipe and an air blowing assembly. The air blowing assembly can be installed on the wall of the hopper and is connected to the air supply pipe. The air supply pipe includes air supply branch pipes and an air supply main pipe. The air supply main pipe is used to connect to an air source for air supply. Multiple air supply branch pipes are connected to the air supply main pipe, and each air supply branch pipe is connected to the air blowing assembly. The air blowing assemblies on the multiple air supply branch pipes can generate a rotating downward airflow to blow away the material in the hopper.

2. The air-film arch-breaking and blockage-clearing structure according to claim 1, characterized in that: The main air supply pipe is an annular air supply pipe that can surround the hopper. Multiple branch air supply pipes are spaced apart on the main air supply pipe, and each branch air supply pipe is arranged along the height direction of the hopper.

3. The air-film arch-breaking and blockage-clearing structure according to claim 2, characterized in that: The gas supply branch pipe is provided above and / or below the main gas supply pipe.

4. The air-film arch-breaking and blockage-clearing structure according to any one of claims 1-3, characterized in that: The air blowing assembly includes a first air blowing structure and a second air blowing structure. Both the first air blowing structure and the second air blowing structure are connected to the air supply branch pipe. The air outlet of the first air blowing structure is downward, and the air outlet of the second air blowing structure is inclined downward or horizontally arranged.

5. The air-film arch-breaking and blockage-clearing structure according to claim 4, characterized in that: The air outlet of the first air blowing structure is a flat air outlet, which is positioned downwards.

6. The air-film arch-breaking and blockage-clearing structure according to claim 5, characterized in that: The first air blowing structure includes a nozzle housing, a gas channel is provided inside the nozzle housing, an air inlet is provided on the outer side of the nozzle housing, the air inlet is connected to the gas channel and is connected to the air supply branch pipe, an air outlet is provided at the bottom of the nozzle housing, the air outlet is connected to the gas channel, and the inner side of the nozzle housing is flush with the inner wall of the hopper.

7. The air-film arch-breaking and blockage-clearing structure according to claim 6, characterized in that: The nozzle housing includes an outer plate, a middle plate, and an inner plate arranged sequentially from the outside to the inside. An air inlet is provided on the outer plate, and an opening is provided at the bottom of the middle plate, which corresponds to the air inlet, so that a gas channel is formed between the outer plate and the inner plate, and the gas channel communicates with the air inlet. The bottom of the inner plate, the bottom of the middle plate, and the outer plate together form the air outlet. The inner side of the inner layer plate is flush with the inner wall of the hopper, and the bottom of the outer layer plate is fixed to the hopper, with the bottom inner side of the outer layer plate flush with the inner wall of the hopper.

8. The air-film arch-breaking and blockage-clearing structure according to claim 4, characterized in that: The second air blowing structure includes an air jet pipe, the air outlet of which is inclined downward or horizontally arranged, and the air outlet is flush with the inner wall of the hopper.

9. The air-film arch-breaking and blockage-clearing structure according to claim 4, characterized in that: Both the first air blowing structure and the second air blowing structure are connected to the air supply branch pipe via an electrically controlled valve. The electrically controlled valve is a pulse valve, and the air source includes a compressed air tank for storing high-pressure air. The high-pressure air generates pulse waves through the pulse valve.

10. A hopper, characterized in that: Includes the air-film arch-breaking and blockage-clearing structure as described in any one of claims 1-9.

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