Dust falling device of asphalt mixing plant

Abstract

The utility model discloses a dust falling device of an asphalt mixing plant, which comprises a main bag-type dust remover and an auxiliary bag-type dust remover, the main bag-type dust remover and the auxiliary bag-type dust remover are arranged side by side, and air inlets of the main bag-type dust remover and the auxiliary bag-type dust remover are hermetically connected with two outlets of an electric control three-way valve; the dust concentration detector is fixedly arranged at an exhaust port of the main bag-type dust remover and is used for detecting the dust concentration in air exhausted by the main bag-type dust remover; the humidity detectors are fixedly arranged at the openings of the air inlet pipes of the main bag-type dust remover and the auxiliary bag-type dust remover; and the plurality of electric heating mesh assemblies are uniformly arranged in the air inlet pipe at intervals. The main bag-type dust remover and the auxiliary bag-type dust remover are arranged and are connected through the electric control three-way valve, under the normal working condition, the electric control three-way valve is communicated with the main bag-type dust remover, when the main bag-type dust remover breaks down, the electric control three-way valve is communicated with the auxiliary bag-type dust remover, at the moment, the main bag-type dust remover is in a shutdown state, and maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixing, in particular to a dust suppression device for an asphalt mixing station. Background Art

[0002] Asphalt mixing plant is a kind of factory equipment used to produce asphalt mixture. Its main function is to heat various raw materials such as asphalt and mineral materials at a certain ratio and mix them accurately to produce asphalt mixture that meets construction requirements. With the help of automatic control system, it can monitor and adjust the production process to ensure stable product quality.

[0003] In the process of producing asphalt, it is necessary to mix the asphalt mixture. There are dry materials and wet materials in the asphalt mixture. A large amount of dust will be generated during the transportation and mixing of the dry materials. This dust will float into the air, polluting the surrounding working environment. If inhaled by the workers, it will cause irreversible physical damage. Therefore, now asphalt mixing plants often use bag dust collectors for dust reduction. Bag dust collectors draw air with extremely high dust content into the machine body and filter it with bags, and then discharge the air with low dust content after filtration, thereby reducing the dust content in the working environment and achieving the purpose of dust reduction.

[0004] In actual use, in order to ensure the adsorption effect of the bags, high-pressure gas cleaning is generally used to clean the bags regularly. When the cleaning device cannot operate normally due to a malfunction or some bags cannot adsorb dust normally due to damage or sticking, the machine needs to be shut down for maintenance, which delays production tasks. In addition, asphalt mixing plants are generally equipped with water mist dust reduction devices, which use fine water mist particles to adsorb dust. Therefore, the overall air humidity in the station is relatively high. After being sucked into the bag dust collector, high-humidity air is very easy to combine with dust and stick to the outer surface of the bag, and it is extremely difficult to be blown off by high-pressure air, which reduces the dust reduction effect. In addition, dust with high humidity is also very easy to adhere to the wall of the ash hopper after falling into the ash hopper, making it difficult to fall, causing the ash hopper outlet to be blocked.

[0005] To this end, the present application specifically proposes a dust reduction device for an asphalt mixing plant to solve the above technical problems. Utility Model Content

[0006] The main purpose of the utility model is to solve the above-mentioned deficiencies and provide a dust reduction device for an asphalt mixing plant, which can be repaired without stopping the machine to ensure production nodes and reduce the probability of dust sticking to the bag and blocking the hopper outlet.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A dust reduction device for an asphalt mixing plant comprises: a main bag dust collector and an auxiliary bag dust collector, the main bag dust collector and the auxiliary bag dust collector are arranged side by side and the air inlet is sealed and connected to the two outlets of an electrically controlled three-way valve; a dust concentration detector is fixedly arranged at the exhaust port of the main bag dust collector and is used to detect the dust concentration in the air exhausted by the main bag dust collector; a humidity detector is fixedly arranged at the air inlet pipe openings of the main bag dust collector and the auxiliary bag dust collector; and a plurality of electric heating mesh assemblies are evenly spaced and arranged in the air inlet pipe.

[0009] Furthermore, the electric heating mesh assembly includes two symmetrically arranged positioning rings, a plurality of fixed positioning posts arranged between the two positioning rings, a heating mesh inserted on the positioning posts and located between the two positioning rings, and a spring movably mounted on the positioning posts and located on both sides of the heating mesh, and the positioning ring is fixedly connected to the inner wall of the intake pipe.

[0010] Furthermore, there are a plurality of humidity detectors, which are evenly arranged around the opening of the intake pipe to detect the humidity of the air entering the intake pipe.

[0011] Furthermore, a plurality of vibration generators are evenly arranged around the outer walls of the ash hoppers of the main bag dust collector and the auxiliary bag dust collector.

[0012] Furthermore, the electrically controlled three-way valve, dust concentration detector, humidity detector, electric heating mesh assembly and vibration generator are electrically connected to the control consoles of the main bag dust collector and the auxiliary bag dust collector.

[0013] The beneficial effects of the utility model are embodied in:

[0014] 1. The utility model sets a main bag dust collector and an auxiliary bag dust collector, and connects the two through an electrically controlled three-way valve. Under normal working conditions, the air inlet of the electrically controlled three-way valve is connected to the main bag dust collector. When the main bag dust collector fails, the dust concentration measured by the dust concentration detector exceeds the preset warning value, the electrically controlled three-way valve is triggered to connect the auxiliary bag dust collector and cut off the connection with the main bag dust collector. At this time, the main bag dust collector is in a shutdown state, which is convenient for maintenance and does not delay production.

[0015] 2. The utility model sets a humidity detector and an electric heating mesh assembly at the air inlet of the bag dust collector, and sets a vibration generator on the ash hopper. The air humidity measured by the humidity detector is used as a trigger point. When the air humidity is high, the electric heating mesh and the vibration generator are triggered to work, and the heating mesh heats and dries the air to prevent the dust and water from combining to stick to the bag. The vibration generator drives the ash hopper to vibrate, and the moist dust is shaken off the hopper wall to ensure the smooth flow of the ash hopper outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 A half-section schematic diagram of a main bag dust collector according to an embodiment of the utility model;

[0019] Figure 3 For an embodiment of the utility model Figure 2 A magnified view of the structure at A;

[0020] Figure 4 This is a schematic diagram of the structure of an electric heating mesh assembly according to an embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the installation position of a dust concentration detector according to an embodiment of the utility model.

[0022] In the figure: 1. Main bag dust collector; 2. Auxiliary bag dust collector; 3. Electric three-way valve; 4. Dust concentration detector; 5. Humidity detector; 6. Air intake pipe; 7. Electric heating mesh assembly; 71. Positioning ring; 72. Positioning column; 73. Heating mesh; 74. Spring; 8. Ash hopper; 9. Vibration generator. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] like Figure 1-5 As shown, the utility model provides a dust suppression device for an asphalt mixing station, comprising:

[0025] A main bag dust collector 1 and an auxiliary bag dust collector 2, the main bag dust collector 1 and the auxiliary bag dust collector 2 are arranged side by side and the air inlet is sealedly connected to the two outlets of the electric-controlled three-way valve 3;

[0026] The dust concentration detector 4 is fixedly arranged at the exhaust port of the main bag dust collector 1 and is used to detect the dust concentration in the air discharged by the main bag dust collector 1;

[0027] The humidity detector 5 is fixedly arranged at the opening of the air inlet pipe 6 of the main bag dust collector 1 and the auxiliary bag dust collector 2;

[0028] A plurality of electric heating mesh assemblies 7 are evenly spaced and arranged in the air intake pipe 6 .

[0029] Under normal working conditions, the air inlet of the electric-controlled three-way valve 3 is connected to the main bag dust collector 1, while the auxiliary bag dust collector 2 is in an idle state. When the internal components of the main bag dust collector 1 fail and cannot effectively adsorb and filter the dust in the air, the dust concentration in the air discharged from its exhaust port increases. When the dust concentration measured by the dust concentration detector 4 exceeds the preset warning value, the electric-controlled three-way valve 3 is triggered to connect the auxiliary bag dust collector 2 and cut off the connection with the main bag dust collector 1. At this time, the main bag dust collector 1 is in a shutdown state, which is convenient for maintenance and does not delay the production. When the humidity of the air sucked into the intake pipe 6 is high and exceeds the warning value preset by the humidity detector 5, the electric heating mesh assembly 7 is triggered to open. The electric heating mesh assembly 7 heats and dries the air with high humidity entering the intake pipe 6 to reduce its humidity, avoid the dust and water combining to cause bag sticking, and affect the effect of the bag adsorbing dust and the dust cleaning assembly cleaning dust, thereby ensuring the dust reduction effect of the equipment.

[0030] In one embodiment, the electric heating mesh assembly 7 includes two symmetrically arranged positioning rings 71, a plurality of positioning posts 72 fixedly arranged around the two positioning rings 71, a heating mesh 73 inserted on the positioning posts 72 and located between the two positioning rings 71, and springs 74 movably sleeved on the positioning posts 72 and located on both sides of the heating mesh 73, and the positioning ring 71 is fixedly connected to the inner wall of the air intake pipe 6. With this design, the positioning ring 71 and the positioning posts 72 provide a stable installation and fixing platform for the heating mesh 73, and part of the dust in the air will adhere to the heating mesh 73 when passing through the air intake pipe 6, so springs 74 are arranged on both sides of the heating mesh 73, and under the driving effect of the air flow and the elastic force of the springs 74, the heating mesh 73 can reciprocate along the direction of the positioning posts 72 to shake off the dust attached thereto, thereby ensuring the heating effect of the heating mesh 73.

[0031] In one embodiment, there are multiple humidity detectors 5, which are evenly arranged around the opening of the intake pipe 6 to detect the humidity of the air entering the intake pipe 6. In this design, humidity detection can be performed on multiple points in the same cross section of the intake pipe 6, and the average value of the values ​​measured by each humidity detector 5 is taken as the accurate value to more accurately determine the humidity of the air.

[0032] In one embodiment, a plurality of vibration generators 9 are evenly arranged around the outer wall of the ash hopper 8 of the main bag dust collector 1 and the auxiliary bag dust collector 2. When the air humidity exceeds the pre-set warning value of the humidity detector 5, the vibration generator 9 is also synchronously triggered to drive the ash hopper 8 to vibrate together, so that the air heated by the electric heating mesh assembly 7 is still relatively high in humidity, resulting in the dust falling into the ash hopper 8 having a high water content and a certain viscosity. The ash hopper 8 can still shake the wet dust off the hopper wall through vibration, ensuring the smooth flow of the ash hopper 8 outlet.

[0033] In one embodiment, the electric-controlled three-way valve 3, the dust concentration detector 4, the humidity detector 5, the electric heating mesh assembly 7 and the vibration generator 9 are electrically connected to the control consoles of the main bag dust collector 1 and the auxiliary bag dust collector 2. In this design, the control console not only supplies power to the above components, but also serves as a triggering medium between them, ensuring that the above functions can be realized normally.

[0034] 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 basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, 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 are included in the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A dust suppression device for an asphalt mixing plant, characterized in that: include: A main bag dust collector (1) and an auxiliary bag dust collector (2), wherein the main bag dust collector (1) and the auxiliary bag dust collector (2) are arranged side by side and the air inlet is sealedly connected to two outlets of an electrically controlled three-way valve (3); A dust concentration detector (4) is fixedly arranged at the exhaust port of the main bag dust collector (1) and is used to detect the dust concentration in the air discharged by the main bag dust collector (1); A humidity detector (5) is fixedly arranged at the opening of the air inlet pipe (6) of the main bag dust collector (1) and the auxiliary bag dust collector (2); A plurality of electric heating mesh assemblies (7) are evenly spaced and arranged in the air inlet pipe (6).

2. The dust suppression device for an asphalt mixing plant according to claim 1, characterized in that: The electric heating mesh assembly (7) comprises two symmetrically arranged positioning rings (71), a plurality of positioning posts (72) fixedly arranged around the two positioning rings (71), a heating mesh (73) inserted on the positioning posts (72) and located between the two positioning rings (71), and springs (74) movably sleeved on the positioning posts (72) and located on both sides of the heating mesh (73), and the positioning ring (71) is fixedly connected to the inner wall of the air intake pipe (6).

3. The dust suppression device for an asphalt mixing plant according to claim 2, characterized in that: There are a plurality of humidity detectors (5), which are evenly arranged around the opening of the air intake pipe (6) and are used to detect the humidity of the air entering the air intake pipe (6).

4. The dust suppression device for an asphalt mixing plant according to claim 3, characterized in that: A plurality of vibration generators (9) are evenly arranged around the outer walls of the ash hoppers (8) of the main bag dust collector (1) and the auxiliary bag dust collector (2).

5. The dust suppression device for an asphalt mixing plant according to claim 4, characterized in that: The electrically controlled three-way valve (3), the dust concentration detector (4), the humidity detector (5), the electric heating mesh assembly (7) and the vibration generator (9) are electrically connected to the control consoles of the main bag dust collector (1) and the auxiliary bag dust collector (2).

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