Powder sprayer device for mine explosion simulation experiment

Abstract

The utility model discloses a powder spraying head device for simulating mine explosion experiments, which comprises a conveying channel, a filtering channel, a powder spraying channel and a baffle assembly, the inside of the conveying channel is of a hollow structure, and external threads are arranged at the two end parts of the conveying channel along the length direction; the end part of the filtering channel is fixedly connected with the conveying channel, a plurality of filtering holes are formed in the inner diameter overlapping part of the filtering channel and the conveying channel, and each filtering hole penetrates through the filtering channel; the powder spraying channel is fixedly installed on the side, away from the conveying channel, of the filtering channel. The interior of the powder spraying channel is of a conical structure. The end, in the length direction, of the baffle assembly is fixedly connected with the middle of the filtering channel, the end, away from the filtering channel, of the baffle assembly is located in the powder spraying channel, and a distance is reserved between the outer wall of the baffle assembly and the inner wall of the powder spraying channel. Powder particles are screened through the filtering holes, meanwhile, the powder particles are dispersed through the filtering holes, and the problems that the powder particles are gathered and the particle sizes are not uniform are solved.

Description

Technical Field

[0001] This utility model relates to the field of powder spraying device technology, and in particular to a powder spraying head device for simulating mine explosion experiments. Background Technology

[0002] In today's society, mine explosions not only endanger personal safety but also cause enormous losses to the social economy. Therefore, to understand the power and process of mine explosions, it is necessary to use experimental equipment to simulate coal mine explosions. Coal mine explosions are mainly affected by the size and concentration of coal particles. A powder spraying device is used to spray powder into the experimental device. The powder spraying device evenly sprays powder into the pipeline. However, existing powder spraying devices have some problems during the spraying process. Due to the long-term storage of powder, clumping is prone to occur, resulting in uneven powder particle size. During powder spraying, it is easy to cause uneven powder thickness and cannot be evenly sprayed on the inner surface of the pipeline, affecting the spraying quality inside the pipeline. In order to make the powder concentration and particle size sprayed from the powder spraying device into the experimental equipment consistent with the powder concentration and particle size in the actual mine, it is necessary to design a powder spraying head device that can simulate mine explosion experiments. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a powder spraying head device for simulating mine explosion experiments. By setting multiple filter holes in the filter channel, the powder particles are screened by size and dispersed by the filter holes, so as to achieve the purpose of controllable particle size and uniform spraying, and solve the problems of powder particle aggregation and uneven particle size.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a powder spraying head device for simulating mine explosion experiments, comprising a conveying channel, a filtering channel, a powder spraying channel, and a baffle assembly. The conveying channel has a hollow internal structure, and both ends of the conveying channel along its length are provided with external threads. The end of the filtering channel is fastened to the conveying channel, and multiple filter holes are provided at the overlapping portion of the inner diameter of the filtering channel and the conveying channel, each filter hole penetrating the filtering channel. The powder spraying channel is fastened to the side of the filtering channel away from the conveying channel, and the powder spraying channel has a conical internal structure. The end of the baffle assembly along its length is fastened to the middle of the filtering channel, and the end of the baffle assembly away from the filtering channel is located inside the powder spraying channel, with a distance maintained between the outer wall of the baffle assembly and the inner wall of the powder spraying channel.

[0005] Preferably, the baffle assembly includes a connecting part and a baffle, the bottom of the baffle is fastened to the end of the connecting part, the end of the connecting part away from the baffle is fastened to the filter channel, and the baffle is located within the conical structure of the powder spraying channel.

[0006] Preferably, the conveying channel has a hollow cylindrical structure, and the end of the conveying channel away from the filter channel is threadedly connected to the powder box.

[0007] Preferably, the sidewall of the filter channel protrudes from the conveying channel and the powder spraying channel.

[0008] Preferably, the end of the powder spraying channel away from the filter channel is securely connected to the high-pressure rectangular pipe to facilitate the spraying of powder onto the high-pressure rectangular pipe.

[0009] Preferably, the end of the connecting part away from the baffle is provided with an external thread, and the center of the filter channel is provided with an internal thread hole that matches the connecting part for easy threaded connection with the connecting part.

[0010] Preferably, the baffle is a conical structure, with a distance between the bottom sidewall of the baffle and the inner wall of the powder spraying channel, and the bottom surface of the baffle is located in the middle of the powder spraying channel.

[0011] Preferably, the baffle is a circular plate, and a distance is left between the circumference of the baffle and the inner wall of the powder spraying channel to facilitate the movement of powder into the conical structure of the powder spraying channel.

[0012] This utility model has the following advantages compared with the prior art:

[0013] 1. This utility model sets multiple filter holes on the filter channel to screen the size of powder particles and disperse the powder particles, thereby achieving the purpose of controllable particle size and uniform spraying, solving the problems of powder particle aggregation and uneven particle size.

[0014] 2. This utility model provides a baffle assembly in the powder spraying channel. The baffle assembly includes a connecting part and a baffle. The baffle prevents powder from directly entering the middle of the high-pressure rectangular pipe. After the powder particles pass through the filter holes and hit the baffle, they change their running path and move towards the arc-shaped conical surface of the powder spraying channel. They are then evenly distributed around the high-pressure rectangular pipe along the arc-shaped conical surface, which improves the accuracy of powder spraying by the powder spraying head device.

[0015] 3. The powder injection head device of this utility model replaces the filter channel according to the size of the gas and coal powder particles, so that the pore size of the filter hole in the filter channel meets the current experiment, which is convenient for simulating the powder concentration and content under real environment, and achieves the purpose of simulating actual working conditions.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the baffle assembly of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the filter channel of this utility model;

[0020] Figure 4 for Figure 2 A sectional view.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1—Conveying channel; 2—Baffle assembly; 3—Filtering channel;

[0023] 4—Powder spraying channel; 5—Filter hole; 6—Connecting part;

[0024] 7—Baffle. Detailed Implementation

[0025] like Figures 1 to 3 As shown, this utility model discloses a powder spraying head device for simulating a mine explosion experiment, including a conveying channel 1, a filtering channel 3, a powder spraying channel 4, and a baffle assembly 2. The conveying channel 1 has a hollow internal structure, and both ends of the conveying channel 1 along its length are provided with external threads. The end of the filtering channel 3 is fastened to the conveying channel 1, and multiple filter holes 5 are provided at the overlapping part of the inner diameter of the filtering channel 3 and the conveying channel 1, with each filter hole 5 penetrating the filtering channel 3. The powder spraying channel 4 is fastened to the side of the filtering channel 3 away from the conveying channel 1, and the powder spraying channel 4 has a conical internal structure. The end of the baffle assembly 2 along its length is fastened to the middle of the filtering channel 3, and the end of the baffle assembly 2 away from the filtering channel 3 is located inside the powder spraying channel 4, with a distance between the outer wall of the baffle assembly 2 and the inner wall of the powder spraying channel 4.

[0026] The baffle assembly 2 includes a connecting part 6 and a baffle 7. The bottom of the baffle 7 is fastened to the end of the connecting part 6, and the end of the connecting part 6 away from the baffle 7 is fastened to the filter channel 3. The baffle 7 is located inside the conical structure of the powder spraying channel 4.

[0027] The powder spraying head device of this invention is used to spray powder of appropriate particle size and concentration during simulated mine explosion experiments. The powder is conveyed to the filter channel 3 via a conveying channel 1. The filter channel 3 has multiple filter holes 5 of the same diameter evenly arranged around its center. These filter holes 5 are spaced equally, causing the powder passing through the conveying channel 1 to disperse after passing through the filter holes 5. Some powder is sprayed onto the baffle assembly 2, while some powder is directly sprayed onto the inner wall of the powder spraying channel 4. The powder sprayed onto the inner wall of the powder spraying channel 4 is then sprayed out along the powder spraying channel 4. The powder sprayed onto the baffle assembly 2 is impacted by the baffle 7, causing the powder particles to separate. Under the reaction force of the baffle 7, the dispersed powder particles move towards the inner wall of the powder spraying channel 4. After reaching the inner wall of the powder spraying channel 4, since the inner wall of the powder spraying channel 4 has a conical structure, that is, the diameter at the outlet of the powder spraying channel 4 is the largest, the powder is sprayed outward along the powder spraying channel 4 under the action of the powder inside the powder spraying channel 4. The powder is dispersed through multiple filter holes 5, which solves the problem of powder agglomeration. The gap between the baffle assembly 2 and the inner wall of the powder spraying channel 4 allows the powder to be sprayed outward under the action of the powder constantly impacting inside the powder spraying channel 4, which improves the uniformity of powder spraying.

[0028] Depending on the size of the powder particles during different mine explosion experiments, filter channel 3 is replaced so that the aperture of filter hole 5 meets the experimental requirements, facilitating the filtration of powders of different particle sizes. Then, powder spraying channel 4 and conveying channel 1 are respectively and securely connected to both ends of filter channel 3.

[0029] The conveying channel 1 is a hollow cylindrical structure, and the end of the conveying channel 1 away from the filter channel 3 is threadedly connected to the powder box.

[0030] In this embodiment, both ends of the conveying channel 1 along its length are provided with external threads. The conveying channel 1 is threadedly connected to the powder box. A sealing ring is provided at the threaded connection between the conveying channel 1 and the powder box to prevent powder leakage. The amount and rate of powder spraying can be adjusted through the powder box to achieve uniform powder spraying.

[0031] The side wall of the filter channel 3 protrudes from the conveying channel 1 and the powder spraying channel 4.

[0032] In this embodiment, the filter channel 3 has a polygonal structure. The filter channel 3 can also be cylindrical or other shapes. This application does not limit this. Both the conveying channel 1 and the powder spraying channel 4 are cylindrical structures. Both ends of the powder spraying channel 4 along its length are provided with external threads. Both ends of the filter channel 3 are provided with internal threads. The internal threads match the external threads of the conveying channel 1 and the powder spraying channel 4, which facilitates the threaded connection of the conveying channel 1 and the powder spraying channel 4 to the two ends of the filter channel 3. The internal threads at both ends of the filter channel 3 are connected to a filter plate. Multiple filter holes 5 are evenly spaced on the filter plate and penetrate the filter plate, so that the powder in the conveying channel 1 can reach the powder spraying channel 4 after passing through the filter holes 5. The sidewall of the filter channel 3 protrudes from the conveying channel 1 and the powder spraying channel 4, which facilitates the threaded connection of the conveying channel 1 and the powder spraying channel 4 to the filter channel 3. At the same time, after the powder spraying channel 4 is connected to the high-pressure rectangular tube, the filter channel 3 can form a snap-fit ​​part to achieve a sealed connection between the powder spraying channel 4 and the high-pressure rectangular tube. Each threaded connection is provided with a sealing ring to prevent powder leakage.

[0033] The end of the powder spraying channel 4 away from the filter channel 3 is securely connected to the high-pressure rectangular pipe to facilitate the spraying of powder onto the high-pressure rectangular pipe.

[0034] In this embodiment, the powder spraying channel 4 is fastened to the high-pressure rectangular pipe by external threads. A sealing ring is provided at the connection between the powder spraying channel 4 and the high-pressure rectangular pipe. The end of the powder spraying channel 4 away from the filter channel 3 is tightly fitted to the inner wall of the high-pressure rectangular pipe. The inner wall of the powder spraying channel 4 has a conical structure. The powder sprayed into the powder spraying channel 4 enters the high-pressure rectangular pipe along the conical arc surface.

[0035] The end of the connecting part 6 away from the baffle 7 is provided with an external thread, and the center of the filter channel 3 is provided with an internal thread hole that matches the connecting part 6 for easy threaded connection with the connecting part 6.

[0036] In this embodiment, the connecting part 6 is a cylindrical structure. The end of the connecting part 6 along the length direction is fixedly connected to the center of the baffle 7. The filter plate in the filter channel 3 is provided with a groove on the side near the powder spraying channel 4. The groove is located at the center of the filter plate. The inner diameter of the groove matches the outer diameter of the connecting part 6. The inner wall of the groove is provided with an internal thread that matches the external thread of the connecting part 6, so that the connecting part 6 can be threadedly connected to the filter plate. After the connecting part 6 is threadedly connected to the filter plate, the baffle 7 is located in the middle of the powder spraying channel 4, so that the baffle 7 can change the path of the powder sprayed out of the filter channel 3, so that the powder moves towards the conical arc surface of the powder spraying channel 4 under the action of the baffle 7, and is sprayed outward to the side wall of the high-pressure rectangular pipe under the action of the powder that is constantly impacted in the powder spraying channel 4. At the same time, after the powder particles collide with the baffle 7, the baffle 7 refines the powder particles.

[0037] like Figure 2 , Figure 4As shown, the baffle 7 has a conical structure. There is a distance between the bottom sidewall of the baffle 7 and the inner wall of the powder spraying channel 4. The bottom of the baffle 7 is located in the middle of the powder spraying channel 4.

[0038] In this embodiment, the baffle 7 has a conical structure, which makes it easy to screw the connecting part 6 into the filter channel 3 by rotating the baffle 7. There is a distance between the bottom side wall of the baffle 7 and the inner wall of the powder spraying channel 4, so that the powder sprayed onto the baffle 7 can move to the inner wall of the powder spraying channel 4 under the reaction force of the baffle 7, and enter the high-pressure rectangular pipe along the conical arc surface of the powder spraying channel 4.

[0039] The baffle 7 is a circular plate, and there is a distance between the circumference of the baffle 7 and the inner wall of the powder spraying channel 4 to facilitate the movement of powder into the conical structure of the powder spraying channel 4.

[0040] In use, according to the simulation experiment requirements, the conveying channel 1 and the powder spraying channel 4 are respectively threaded to both ends of the filter channel 3 with a suitable aperture. The baffle assembly 2 is threaded to the filter channel 3, so that the baffle 7 is located in the middle of the powder spraying channel 4. Then, the end of the conveying channel 1 away from the filter channel 3 is threaded to the powder box, and the end of the powder spraying channel 4 away from the filter channel 3 is threaded to the high-pressure rectangular pipe. The powder box is started, and the powder box conveys powder into the conveying channel 1. After the powder in the conveying channel 1 passes through the filter hole 5, part of it is sprayed onto the baffle 7. Part of the powder is sprayed onto the conical arc surface of the powder spraying channel 4. The powder sprayed onto the conical arc surface of the powder spraying channel 4 enters the inner cavity of the high-pressure rectangular pipe along the conical arc surface. The powder sprayed onto the baffle 7 moves towards the conical arc surface of the powder spraying channel 4 under the impact of the baffle 7, preventing the powder from being sprayed directly into the high-pressure rectangular pipe along the filter hole 5. Under the action of the powder spraying channel 4 and the moving particles in the powder spraying channel 4, the powder moves towards the surrounding side walls of the high-pressure rectangular pipe, so that the size and concentration of the powder particles entering the inner cavity of the high-pressure rectangular pipe are similar to those in the simulation experiment, thus improving the accuracy of the powder spraying head device.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A powder injection head device for use in a simulated mine explosion experiment, characterized by: It comprises a conveying channel (1), a filtering channel (3), a powder spraying channel (4) and a baffle assembly (2), The conveying channel (1) is hollow inside, and the two ends of the conveying channel (1) along the length direction are provided with external threads; The end of the filtering channel (3) is tightly connected with the conveying channel (1), and a plurality of filtering holes (5) are arranged at the overlapping position of the inner diameter of the filtering channel (3) and the conveying channel (1), each filtering hole (5) penetrates the filtering channel (3); The powder spraying channel (4) is tightly installed on the side of the filtering channel (3) away from the conveying channel (1), and the inside of the powder spraying channel (4) is a conical structure; The end of the baffle assembly (2) along the length direction is tightly connected with the middle part of the filtering channel (3), and the end of the baffle assembly (2) away from the filtering channel (3) is located in the powder spraying channel (4), and a distance is left between the outer wall of the baffle assembly (2) and the inner wall of the powder spraying channel (4).

2. A powder injection head device for use in simulated mine explosion experiments according to claim 1, characterized in that: The baffle assembly (2) comprises a connecting part (6) and a baffle (7), the bottom of the baffle (7) is tightly connected with the end of the connecting part (6), the end of the connecting part (6) away from the baffle (7) is tightly connected with the filtering channel (3), and the baffle (7) is located in the conical structure of the powder spraying channel (4).

3. A powder projection head device for use in a simulation of a mine explosion experiment according to claim 1, characterized in that: The conveying channel (1) is a hollow cylindrical structure, and the end of the conveying channel (1) away from the filtering channel (3) is threadedly connected with a powder tank.

4. The powder injection head assembly of claim 1, wherein: The side wall of the filtering channel (3) protrudes from the conveying channel (1) and the powder spraying channel (4).

5. The powder injection head assembly of claim 1, wherein: The end of the powder spraying channel (4) away from the filtering channel (3) is tightly connected with a high-pressure rectangular pipeline, so as to facilitate the powder to be sprayed to the high-pressure rectangular pipeline.

6. A powder injection head assembly for use in simulated mine explosion experiments according to claim 2, characterized in that: The end of the connecting part (6) away from the baffle (7) is provided with external threads, and the center of the filtering channel (3) is provided with an internal thread hole matched with the connecting part (6), so as to facilitate the threaded connection with the connecting part (6).

7. A powder projection head device for use in a simulated mine explosion experiment according to claim 2, characterized in that: The baffle (7) is a conical structure, a distance is left between the bottom side wall of the baffle (7) and the inner wall of the powder spraying channel (4), and the bottom of the baffle (7) is located in the middle part of the powder spraying channel (4).

8. A powder injection head assembly for use in simulated mine explosion experiments according to claim 2, characterized in that: The baffle (7) is a circular plate, and a distance is left between the circumference of the baffle (7) and the inner wall of the powder spraying channel (4), so as to facilitate the movement of the powder to the conical structure of the powder spraying channel (4).

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