A main fan non-stop switching device

Abstract

The utility model discloses a main fan does not stop wind and inverts machine switching device relates to ventilator technical field, the utility model discloses a main ventilation pipe, the outer wall fixedly connected with a plurality of branch pipes of main ventilation pipe, the outer wall of branch pipe is provided with mounting mechanism, and the mounting mechanism includes a plurality of sealing pads, and through the sealing pad of setting, can carry out sealing treatment to the connecting place between branch pipe and main ventilation pipe, prevents appearing the air leakage phenomenon, the utility model discloses a connecting rod on screw rod is set up, when needing to remove first ventilator or second ventilator and maintain, rotates screw rod, and when screw rod rotates, will drive connecting rod to move to the one end close to fixed block, and when connecting rod moves, will drive multiple limit axes to move to the one end close to fixed block simultaneously, has reached when needing to overhaul fan, can directly remove single fan from main ventilation pipe, and the sealing property of air passage is guaranteed through sealing rubber ring in the butt joint process.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation fan technology, and in particular relates to a main ventilation fan switching device that allows for continuous operation and switching. Background Technology

[0002] According to the published patent CN212296464U, the ventilation fan reversing system without interruption of ventilation includes two horizontally arranged short-circuit dampers and two vertically arranged fan mesh dampers. The two short-circuit dampers are designated as the first short-circuit damper and the second short-circuit damper, and the two fan mesh dampers are designated as the first fan mesh damper and the second fan mesh damper. This system achieves an effective and continuous supply of ventilation power during reversing, featuring rapid and flexible switching. It eliminates gas accumulation and exceeding limits caused by ventilation interruption during reversing, thus eliminating safety hazards and improving the safety and reliability of the entire mine ventilation system. However, it still has the following shortcomings:

[0003] While the above-mentioned equipment can effectively and continuously supply ventilation power during the reversing process, it is not convenient to remove a single fan from the main ventilation pipe when the fan is damaged and needs to be removed for replacement or maintenance, which reduces the user's work efficiency. Therefore, we propose a main ventilation fan reversing switching device that does not stop the airflow. Utility Model Content

[0004] The purpose of this utility model is to provide a main ventilation fan switching device that allows for continuous and effective supply of ventilation power during switching. Through the installation mechanism and the flow stabilization mechanism, this device solves the problem that, although it can achieve effective and continuous supply of ventilation power during the switching process, it is inconvenient to remove a single fan from the main ventilation pipe when the fan is damaged and needs to be removed for replacement or maintenance, which reduces the user's work efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a main ventilation fan switching device that allows the main ventilation fan to run continuously while reversing, including a main ventilation pipe, with several branch pipes fixedly connected to the outer wall of the main ventilation pipe, and an installation mechanism provided on the outer wall of each branch pipe;

[0007] The installation mechanism includes several sealing gaskets. Several fixing blocks are fixedly connected to the inner wall of the branch pipe near the main ventilation pipe. Threaded rods are rotatably connected to the inner walls of the fixing blocks. Connecting rods are threaded to the outer walls of the threaded rods. Several limiting shafts are rotatably connected to the inner wall of the connecting rod away from the threaded rod. Several fixing shafts are fixedly connected to the outer wall of the branch pipe near the fixing blocks. Pull rods are slidably connected to the outer walls of the fixing shafts. An arc-shaped groove is formed on the inner wall of the pull rod near the fixing shaft. A first ventilator is fixedly connected to the inner wall of the upper branch pipe, and a second ventilator is fixedly connected to the inner wall of the lower branch pipe. A flow stabilizing mechanism is provided on the outer wall of the branch pipe.

[0008] Furthermore, the outer walls of several of the sealing gaskets are fixedly connected to the inner wall of the branch pipe, and the inner wall of the arc-shaped groove is slidably connected to the outer wall of the fixed shaft.

[0009] Furthermore, the flow stabilizing mechanism includes several motor frames, the outer wall of which is fixedly connected to the outer wall of the branch pipe, and a motor is fixedly connected to the inner wall of each of the several motor frames.

[0010] Furthermore, the bottom output ends of several motors are all fixedly connected to drive shafts via couplings, and gears are fixedly connected to the outer walls of several drive shafts.

[0011] Furthermore, a limiting groove is formed on the inner wall of several of the branch pipes, and an annular limiting plate is rotatably connected to the inner wall of the limiting groove.

[0012] Furthermore, a second gear is fixedly connected to the outer wall of the annular limiting plate near the gear, and the outer wall of the second gear meshes with the outer wall of the gear. Several sliding rods are fixedly connected to the outer wall of the annular limiting plate.

[0013] Furthermore, a slide rail is slidably connected to the outer wall of each of the slide rods, and a rotating rod is fixedly connected to the inner wall of the end of the slide rail away from the slide rod. The outer wall of each of the rotating rods is rotatably connected to the inner wall of the branch pipe.

[0014] Furthermore, a limit block is rotatably connected to the outer wall of the end of the rotating rod away from the slide rail, and a baffle is fixedly connected to the outer wall of the rotating rod.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model features a connecting rod on a threaded rod. When the equipment needs to be used, if the first or second ventilator needs to be disassembled for maintenance, rotating the threaded rod will cause the connecting rod to move towards the end closer to the fixed block. The movement of the connecting rod will simultaneously cause multiple limiting shafts to move towards the end closer to the fixed block. The movement of the limiting shafts will push the pull rod towards the main ventilation duct. Because the arc-shaped groove on the pull rod slides on the fixed shaft, a single fan can be directly disassembled from the main ventilation duct when maintenance is required. During the connection process, a sealing ring ensures the airflow is sealed, preventing air leakage and a decrease in ventilation volume, thus improving the applicability of the device and facilitating the subsequent installation of fans with different airflow rates.

[0017] 2. This utility model incorporates an annular limiting plate within a limiting groove. During equipment operation, if airflow in the main ventilation duct and branch duct becomes turbulent, starting the motor causes the transmission shaft to rotate, which in turn drives a gear. This gear then rotates, causing the annular limiting plate to rotate within the limiting groove. Simultaneously, the rotation of the annular limiting plate rotates multiple sliding rods. Because the groove width inside the slide rail is greater than the diameter of the sliding rods, this design effectively manages the turbulent airflow discharged from the fan during continuous ventilation reversal, allowing it to enter the main duct in a more uniform and stable manner, thus reducing the risk of equipment vibration and surge.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of 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.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a sectional view of the installation mechanism of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a cross-sectional view of the current stabilization mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Main ventilation duct; 101. Branch duct; 2. Installation mechanism; 201. Sealing gasket; 202. Fixing block; 203. Threaded rod; 204. Connecting rod; 205. Limiting shaft; 206. Fixing shaft; 207. Tie rod; 208. Arc groove; 209. First ventilator; 210. Second ventilator; 3. Flow stabilizing mechanism; 301. Motor frame; 302. Motor; 303. Drive shaft; 304. Gear; 305. Annular limiting plate; 306. Gear II; 307. Limiting slide groove; 308. Slide rod; 309. Slide rail; 310. Rotating rod; 311. Limiting block; 312. Baffle. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 As shown, this utility model is a main ventilation fan switching device that allows the main ventilation fan to switch between running and reversing without stopping, including a main ventilation pipe 1, a plurality of branch pipes 101 are fixedly connected to the outer wall of the main ventilation pipe 1, and an installation mechanism 2 is provided on the outer wall of the branch pipes 101.

[0030] The installation mechanism 2 includes several sealing gaskets 201. These gaskets 201 seal the connection between the branch pipe 101 and the main ventilation pipe 1, preventing air leakage and unstable flow. Several fixing blocks 202 are fixedly connected to the inner wall of the branch pipe 101 near the main ventilation pipe 1. Each fixing block 202 has a threaded rod 203 rotatably connected to its inner wall. A connecting rod 204 is threadedly connected to the outer wall of the threaded rod 203. Several limiting shafts 205 are rotatably connected to the inner wall of the connecting rod 204 away from the threaded rod 203. The fixing blocks 202 limit the position of the threaded rod 203, preventing displacement or even detachment. The outer wall of the branch pipe 101 near the fixing blocks 202 is fixedly connected to the main ventilation pipe 101. A number of fixed shafts 206 are fixedly connected, and a pull rod 207 is slidably connected to the outer wall of each fixed shaft 206. An arc-shaped groove 208 is opened on the inner wall of the end of the pull rod 207 near the fixed shaft 206. The arc-shaped groove 208 can limit the movement trajectory of the pull rod 207, so that when the pull rod 207 moves on the fixed shaft 206, it can move in the direction of the arc-shaped groove 208. A first ventilator 209 is fixedly connected to the inner wall of the upper branch pipe 101, and a second ventilator 210 is fixedly connected to the inner wall of the lower branch pipe 101. A flow stabilizing mechanism 3 is provided on the outer wall of the branch pipe 101. With the first ventilator 209 and the second ventilator 210, ventilation can be provided inside the main ventilation pipe 1 when any one of the fans is started.

[0031] The outer walls of several sealing gaskets 201 are fixedly connected to the inner wall of the branch pipe 101. The inner wall of the arc-shaped groove 208 is slidably connected to the outer wall of the fixed shaft 206. The flow stabilizing mechanism 3 includes several motor frames 301. The outer wall of the motor frame 301 is fixedly connected to the outer wall of the branch pipe 101. A motor 302 is fixedly connected to the inner wall of each of the several motor frames 301. The motor frames 301 can fix the position of the motor 302 to prevent the motor 302 from shaking violently during operation, which would affect the subsequent normal transmission process. Each motor 302 has a transmission shaft 303 fixedly connected to its bottom output end via a coupling. Gears 304 are fixedly connected to the outer walls of each transmission shaft 303. Limiting grooves 307 are provided on the inner walls of each branch pipe 101. An annular limiting plate 305 is rotatably connected to the inner wall of the limiting groove 307. The limiting groove 307 can limit the movement trajectory of the annular limiting plate 305, preventing the annular limiting plate 305 from falling off, and at the same time, it can ensure that the annular limiting plate 305 can only slide within the limiting groove 307.

[0032] A gear 306 is fixedly connected to the outer wall of the annular limiting plate 305 near the gear 304. The outer wall of the gear 306 meshes with the outer wall of the gear 304. Several sliding rods 308 are fixedly connected to the outer wall of the annular limiting plate 305. A slide rail 309 is slidably connected to the outer wall of each sliding rod 308. The sliding rods 308 can limit the position of the slide rail 309. When the sliding rods 308 move, they will drive the slide rail 309 to swing left and right. A rotating rod 310 is fixedly connected to the inner wall of the slide rail 309 away from the sliding rods 308. The outer walls of the rotating rods 310 are rotatably connected to the inner wall of the branch pipe 101. A limiting block 311 is rotatably connected to the outer wall of the rotating rod 310 away from the slide rail 309. A baffle 312 is fixedly connected to the outer wall of the rotating rod 310. The limiting block 311 can connect the rotating rods 310 to prevent the limiting block 311 from falling off, and at the same time, it can make the movement of the rotating rod 310 more stable.

[0033] One specific application of this embodiment is:

[0034] When staff need to use the equipment, during the continuous ventilation reversal process, if the airflow in the main ventilation duct 1 and branch duct 101 becomes turbulent, the motor 302 is started. The rotation of the motor 302 drives the transmission shaft 303 to rotate, which in turn drives the gear 304 to rotate, which in turn drives the second gear 306 to rotate. The rotation of the second gear 306 drives the annular limiting plate 305 to rotate within the limiting groove 307. When the annular limiting plate 305 rotates, it simultaneously drives multiple sliding rods 308 to rotate. Since the groove width inside the slide rail 309 is larger than the diameter of the sliding rods 308, the rotation of the sliding rods 308 drives the slide rail 309 to swing left and right without jamming between the slide rail 309 and the sliding rods 308. When the slide rail 309 swings, it drives the motor frame rotating rod 310 to rotate within the branch duct 101. The rotation of the rotating rod 310 drives the baffle 312 to rotate, thereby combing the airflow within the branch duct 101. The threaded rod 203 is rotated to gradually stabilize the main ventilation pipe 101. When the first ventilation fan 209 or the second ventilation fan 210 needs to be disassembled for maintenance, the threaded rod 203 is rotated. When the threaded rod 203 rotates, it will drive the connecting rod 204 to move towards the end closer to the fixed block 202. When the connecting rod 204 moves, it will simultaneously drive multiple limit shafts 205 to move towards the end closer to the fixed block 202. When the limit shafts 205 move, they will push the pull rod 207 to move towards the main ventilation pipe 1. Since the arc groove 208 on the pull rod 207 slides on the fixed shaft 206, the movement trajectory of the pull rod 207 will follow the arc groove 208. After the pull rod 207 is close to the main ventilation pipe 1 for a certain distance, it will gradually rotate towards the center with the limit shaft 205 as the axis. This will prevent the pull rod 207 from getting stuck on the main ventilation pipe 1 during the process of pulling out the branch pipe 101. After adjusting the pull rod 207 to the appropriate position, the branch pipe 101 can be removed directly from one side.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A main fan non-stop switching device for main ventilation fan, comprising a main ventilation pipe (1), characterized in that: The outer wall of the main ventilation pipe (1) is fixedly connected to several branch pipes (101), and the outer wall of the branch pipes (101) is provided with an installation mechanism (2); The installation mechanism (2) includes several sealing gaskets (201). Several fixing blocks (202) are fixedly connected to the inner wall of the branch pipe (101) near the main ventilation pipe (1). Threaded rods (203) are rotatably connected to the inner walls of the fixing blocks (202). A connecting rod (204) is threadedly connected to the outer wall of the threaded rod (203). Several limiting shafts (205) are rotatably connected to the inner wall of the connecting rod (204) away from the threaded rod (203). The branch pipe (101) near the fixing blocks (201)... 02) has several fixed shafts (206) fixedly connected to one end of the outer wall. Each of the fixed shafts (206) has a pull rod (207) slidably connected to its outer wall. The inner wall of the pull rod (207) near the fixed shaft (206) has an arc groove (208). The inner wall of the upper branch pipe (101) is fixedly connected to a first ventilator (209). The inner wall of the lower branch pipe (101) is fixedly connected to a second ventilator (210). The outer wall of the branch pipe (101) is provided with a flow stabilizing mechanism (3).

2. A primary fan non-stop switching device according to claim 1, characterized in that, The outer walls of several of the sealing gaskets (201) are fixedly connected to the inner wall of the branch pipe (101), and the inner wall of the arc groove (208) is slidably connected to the outer wall of the fixed shaft (206).

3. The main ventilation fan switching device according to claim 1, characterized in that, The flow stabilizing mechanism (3) includes several motor frames (301), the outer wall of the motor frame (301) is fixedly connected to the outer wall of the branch pipe (101), and a motor (302) is fixedly connected to the inner wall of each of the several motor frames (301).

4. A primary fan non-stop changeover device according to claim 3, characterized in that, The bottom output ends of several motors (302) are all fixedly connected to drive shafts (303) via couplings, and gears (304) are fixedly connected to the outer walls of several drive shafts (303).

5. The main ventilation fan switching device according to claim 4, characterized in that, Each of the branch pipes (101) has a limiting groove (307) on its inner wall, and the inner wall of the limiting groove (307) is rotatably connected to an annular limiting plate (305).

6. A primary fan non-stop changeover device according to claim 5, characterized in that, Gear 2 (306) is fixedly connected to the outer wall of the annular limiting plate (305) near the gear (304). The outer wall of gear 2 (306) meshes with the outer wall of gear (304). Several sliding rods (308) are fixedly connected to the outer wall of the annular limiting plate (305).

7. A primary fan non-stop changeover device according to claim 6, characterized in that, Each of the slide rods (308) has a slide rail (309) slidably connected to its outer wall. A rotating rod (310) is fixedly connected to the inner wall of the end of the slide rail (309) away from the slide rod (308). The outer walls of each of the rotating rods (310) are rotatably connected to the inner wall of the branch pipe (101).

8. The main ventilation fan switching device according to claim 7, characterized in that, A limit block (311) is rotatably connected to the outer wall of the end of the rotating rod (310) away from the slide rail (309), and a baffle (312) is fixedly connected to the outer wall of the rotating rod (310).

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