A telescopic pipe butt joint structure for coal mine ventilation

Abstract

The utility model provides a kind of telescopic duct butt joint structure for coal mine ventilation, including two groups of ventilation duct, two groups of ventilation duct are connected by butt joint assembly between, butt joint assembly includes two groups of fixed frame, multiple groups of connecting frame and multiple groups of reinforcing frame, two groups of fixed frame are respectively arranged in the opposite end of two groups of ventilation duct, multiple groups of connecting frame are arranged between two groups of fixed frame, multiple groups of reinforcing frame are respectively arranged between two groups of adjacent connecting frame, multiple groups of folding grooves are evenly distributed along its axial direction and are set in connecting frame, by compressing multiple groups of connecting frame, the elastic deformation of folding groove side wall is utilized, so that butt joint assembly can be telescopic and bending, the utility model is set by the folding groove of connecting frame, so that butt joint assembly has stable telescopic and bendable ability, improve the adaptability of device to underground roadway deformation.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine ventilation technology, and more specifically, it relates to a retractable pipe connection structure for coal mine ventilation. Background Technology

[0002] Coal mine ventilation systems are crucial equipment for ensuring operational safety. As the core structure for airflow transport, the reliability of the connection points of ventilation ducts determines ventilation efficiency and underground air quality. To achieve long-distance, dead-angle-free ventilation, multiple ventilation duct sections need to be connected into a complete passage through connection structures. This ensures that fresh air reaches the work face directly and toxic and harmful gases are discharged in a timely manner, creating a safe working environment for workers.

[0003] However, the docking structure of traditional equipment is mostly a rigid flange connection, which relies on bolts to fasten the pipes. It lacks the ability to expand and bend. When the tunnel experiences slight settlement, stress concentration is easily generated at the rigid docking point, which can lead to pipe cracking or flange seal failure, resulting in air leakage. This not only reduces ventilation efficiency but may also cause safety hazards. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a retractable pipe connection structure for coal mine ventilation, thereby solving the technical problem that traditional devices lack the ability to expand, contract, and bend due to their fixed structure.

[0005] The purpose and function of this utility model's retractable pipe connection structure for coal mine ventilation are achieved through the following specific technical means: A retractable duct docking structure for coal mine ventilation includes two sets of ventilation ducts connected by a docking assembly. The docking assembly includes two sets of fixed frames, multiple sets of connecting frames, and multiple sets of reinforcing frames. The two sets of fixed frames are respectively disposed at opposite ends of the two sets of ventilation ducts. The multiple sets of connecting frames are disposed between the two sets of fixed frames. The multiple sets of reinforcing frames are respectively disposed between adjacent sets of connecting frames. Each connecting frame has multiple sets of folding grooves evenly distributed along its axial direction. By compressing the multiple sets of connecting frames, the elastic deformation of the sidewalls of the folding grooves allows the docking assembly to extend, retract, and bend.

[0006] Ideally, the connecting frame can be made of rubber and filled with iron wire. The iron wire is used to enhance the structural strength of the connecting frame without affecting its bending. A sealing ring is fixed to one end of the fixed frame near the ventilation duct. One end of the sealing ring is inserted into the ventilation duct and fits against the inner wall of the ventilation duct. The other end of the sealing ring is inserted into the fixed frame and fixed with bolts.

[0007] Optimal, one end of a set of connecting frames near the fixed frame is inserted into the fixed frame and fixed with bolts. The other end of the connecting frame is connected to an adjacent set of connecting frames through a reinforcing frame. The reinforcing frame is fixed to the connecting frame with bolts, and the reinforcing frame is a rigid structure used to limit excessive deformation of the connecting frame.

[0008] Optimally, after compressing and bending multiple sets of the connecting frames, external hangers are used to connect the two sets of ventilation ducts and the multiple sets of reinforcing frames to fix the docking assembly and maintain the deformation stability of the docking assembly.

[0009] Ideally, a filter plate is connected to one end of the fixed frame near the connecting frame by screws, a filter cylinder is detachably connected to the filter plate, and a filter element is provided inside the filter cylinder.

[0010] Ideally, a filter cover is threaded to one end of the filter cartridge, and the filter element is located between the filter cover and the filter cartridge. After the filter cover is tightened, the filter element is pressed tightly. Multiple sets of buckles are integrally formed at the end of the filter cartridge near the filter plate. All sets of buckles are locked onto the filter plate and are interference-fitted with the filter plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the folding groove of the connecting frame, enables the docking component to have stable extensibility and bendability, improving the adaptability of the device to the deformation of underground roadways. After roadway subsidence or pipeline displacement, the user does not need to disassemble and rebuild the pipeline. The shape adjustment of the docking structure can be completed simply by compressing or stretching the connecting frame to adapt to the axial displacement and radial bending requirements of the pipeline. This avoids the problem of cracking and air leakage in traditional rigid docking structures, and improves the safety protection capability and environmental adaptability of the device.

[0012] 2. When using this device, the user can fix its shape after the docking components are stretched and bent by coordinating the reinforcing frame and the external hanger, which improves the reliability of the device after deformation. Then, through the setting of the sealing ring and the filter cartridge, the device can achieve the function of stretching and bending while taking into account the filtration effect. The sealing ring reduces air leakage, and the filter cartridge reduces dust accumulation, thereby reducing pipeline maintenance costs and safety hazards and improving the practical value of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembled structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a side view structural diagram of the present invention; Figure 4 This is a top view of the structure of this utility model.

[0014] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows: 11. Ventilation duct; 21. Fixing frame; 22. Connecting frame; 23. Reinforcing frame; 24. Sealing ring; 31. Filter plate; 32. Filter cartridge; 33. Filter element; 34. Filter cover; 201. Folded groove. Detailed Implementation

[0015] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model. Example

[0016] like Figure 1 , Figure 2 and Figure 4 As shown, this utility model provides a retractable duct docking structure for coal mine ventilation, including two sets of ventilation ducts 11 connected by a docking assembly. The docking assembly includes two sets of fixing frames 21, multiple sets of connecting frames 22, and multiple sets of reinforcing frames 23. The two sets of fixing frames 21 are respectively disposed at opposite ends of the two sets of ventilation ducts 11, the multiple sets of connecting frames 22 are disposed between the two sets of fixing frames 21, and the multiple sets of reinforcing frames 23 are respectively disposed between adjacent sets of connecting frames 22. Each connecting frame 22 has multiple sets of folding grooves 201 evenly distributed along its axial direction. By compressing the multiple sets of connecting frames 22, the elastic deformation of the sidewalls of the folding grooves 201 allows the docking assembly to extend, retract, and bend.

[0017] Specifically, the ventilation duct 11 is responsible for ventilation, the docking assembly connects the two sets of ventilation ducts 11, enabling the two sets of ventilation ducts 11 to expand, contract and bend. The fixed frame 21 connects the ventilation duct 11 with other parts of the docking assembly, providing basic support for the entire docking structure. The connecting frame 22 is the part that enables the docking assembly to expand, contract and bend. Its axially evenly distributed folding grooves 201 undergo elastic deformation on the sidewalls when compressed, thereby achieving expansion, contraction and bending. The reinforcing frame 23 is distributed between adjacent connecting frames 22, enhancing the overall stability of the docking assembly structure.

[0018] The connecting frame 22 can be made of rubber and filled with iron wire. The iron wire is used to enhance the structural strength of the connecting frame 22 without affecting its bending. A sealing ring 24 is fixed to one end of the fixed frame 21 near the ventilation duct 11. One end of the sealing ring 24 is inserted into the ventilation duct 11 and fits against the inner wall of the ventilation duct 11. The other end of the sealing ring 24 is inserted into the fixed frame 21 and fixed with bolts.

[0019] Specifically, the rubber connecting frame 22 has good flexibility and is easy to bend, while the internal filling with iron wire enhances its structural strength, ensuring that the connecting frame 22 can withstand certain pressure without deformation in the complex ventilation environment of coal mines. The sealing ring 24 plays a sealing role between the fixed frame 21 and the ventilation duct 11, preventing air leakage during ventilation and ensuring ventilation effect. One end is inserted into the ventilation duct 11, and the other end is fixed to the fixed frame 21 by bolts, which improves the reliability of the device.

[0020] One end of a set of connecting frames 22 near the fixed frame 21 is inserted into the fixed frame 21 and fixed by bolts. The other end of the connecting frame 22 is connected to the adjacent set of connecting frames 22 through a reinforcing frame 23. The reinforcing frame 23 is fixed to the connecting frame 22 by bolts, and the reinforcing frame 23 is a rigid structure used to limit the excessive deformation of the connecting frame 22.

[0021] Specifically, the connecting frame 22 is fixed to the fixed frame 21 and adjacent connecting frames 22 by bolts, which ensures the stable connection between the various parts of the docking assembly. The reinforcing frame 23, as a rigid structure, limits the excessive deformation of the connecting frame 22, avoids damage to the connecting frame 22 due to excessive deformation or affects the normal function of the docking assembly, and ensures the stability and reliability of the docking assembly during expansion and contraction.

[0022] After compressing and bending multiple sets of connecting frames 22, external hangers are used to connect two sets of ventilation ducts 11 and multiple sets of reinforcing frames 23 to fix the docking components and maintain the deformation stability of the docking components.

[0023] Specifically, after the docking assembly completes its extension and bending operations, the external hanger connects the ventilation duct 11 and the reinforcing frame 23, which can fix the entire docking assembly. Since the connecting frame 22 may have a tendency to recover after deformation, the tension applied by the external hanger can maintain the deformation state of the docking assembly, ensuring that it remains stable during the use of coal mine ventilation, and will not affect the normal docking and ventilation effect of the ventilation duct 11 due to the rebound of the connecting frame 22.

[0024] like Figure 2 and Figure 3 As shown, a filter plate 31 is connected to one end of the fixed frame 21 near the connecting frame 22 by screws. A filter cylinder 32 is detachably connected to the filter plate 31, and a filter element 33 is provided inside the filter cylinder 32.

[0025] Specifically, the filter plate 31, filter cylinder 32, and filter element 33 together constitute the ventilation and filtration structure. The filter plate 31 is connected to the fixing frame 21 by screws, which facilitates installation and disassembly. The filter cylinder 32 is detachably connected to the filter plate 31, which facilitates the replacement or cleaning of the filter cylinder 32 and its internal filter element 33. The filter element 33 is used to filter impurities in the ventilation process, ensure the quality of ventilation, and meet the air quality requirements of coal mine ventilation.

[0026] The filter cartridge 32 is threaded to one end with a filter cover 34. The filter element 33 is located between the filter cover 34 and the filter cartridge 32. After the filter cover 34 is tightened, the filter element 33 is pressed. The end of the filter cartridge 32 near the filter plate 31 is integrally formed with multiple sets of buckles. All sets of buckles are locked on the filter plate 31 and are interference-fitted with the filter plate 31.

[0027] Specifically, the filter cover 34 is threaded to one end of the filter cartridge 32. Tightening the filter cover 34 can press the filter element 33 into the filter cartridge 32, reducing the displacement of the filter element 33 during ventilation and ensuring the filtration effect. The clips on the filter cartridge 32 and the interference fit with the filter plate 31 enable the filter cartridge 32 to be stably connected to the filter plate 31 and will not easily fall off during ventilation, thus ensuring the stability and reliability of the filtration structure.

[0028] The specific usage and function of this embodiment are as follows: In practical application of this device, first install the two sets of fixing frames 21 at the opposite ends of the two sets of ventilation ducts 11 respectively, and then assemble the connecting frame 22 and the reinforcing frame 23 in sequence to form a complete docking assembly. When it is necessary to adjust the length or angle of the ventilation duct 11, the connecting frame 22 is compressed by external force, and the side wall of the folding groove 201 undergoes elastic deformation, which drives the docking assembly to extend, retract or bend, thereby realizing the position adjustment of the two sets of ventilation ducts 11. After the adjustment is completed, the ventilation duct 11 and the reinforcing frame 23 are connected by an external hanger to fix the shape of the docking assembly and prevent it from changing its position due to elastic rebound. During the ventilation process, air enters the docking assembly from one set of ventilation ducts 11, is filtered by the filter cartridge 32 and filter element 33 on the filter plate 31, and is then discharged through the other set of ventilation ducts 11 to remove impurities in the air. When the filter element 33 needs to be replaced, loosen the buckle on the filter cartridge 32, remove the filter cartridge 32 and unscrew the filter cover 34, replace the new filter element 33 and reassemble.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A retractable duct connection structure for coal mine ventilation, comprising two sets of ventilation ducts (11), characterized in that: The two sets of ventilation ducts (11) are connected by a docking assembly. The docking assembly includes two sets of fixed frames (21), multiple sets of connecting frames (22), and multiple sets of reinforcing frames (23). The two sets of fixed frames (21) are respectively set at opposite ends of the two sets of ventilation ducts (11). The multiple sets of connecting frames (22) are set between the two sets of fixed frames (21). The multiple sets of reinforcing frames (23) are respectively set between two adjacent sets of connecting frames (22). Each connecting frame (22) has multiple sets of folding grooves (201) evenly distributed along its axial direction. By compressing the multiple sets of connecting frames (22), the elastic deformation of the sidewall of the folding groove (201) allows the docking assembly to extend, retract, and bend.

2. The retractable duct connection structure for coal mine ventilation according to claim 1, characterized in that: The connecting frame (22) can be made of rubber and filled with iron wire. The iron wire is used to enhance the structural strength of the connecting frame (22) without affecting the bending of the connecting frame (22). A sealing ring (24) is fixed at one end of the fixed frame (21) near the ventilation duct (11). One end of the sealing ring (24) is stuck in the ventilation duct (11) and fits against the inner wall of the ventilation duct (11). The other end of the sealing ring (24) is stuck in the fixed frame (21) and fixed by bolts.

3. The retractable duct connection structure for coal mine ventilation according to claim 2, characterized in that: One end of a set of connecting frames (22) near the fixed frame (21) is inserted into the fixed frame (21) and fixed by bolts. The other end of the connecting frame (22) is connected to an adjacent set of connecting frames (22) through a reinforcing frame (23). The reinforcing frame (23) is fixed to the connecting frame (22) by bolts, and the reinforcing frame (23) is a rigid structure used to limit the excessive deformation of the connecting frame (22).

4. The retractable duct connection structure for coal mine ventilation according to claim 3, characterized in that: After the multiple sets of connecting frames (22) are compressed for expansion and bending, the two sets of ventilation ducts (11) and the multiple sets of reinforcing frames (23) are connected by external hangers to fix the docking assembly and maintain the deformation stability of the docking assembly.

5. The retractable duct connection structure for coal mine ventilation according to claim 1, characterized in that: The fixed frame (21) is connected to a filter plate (31) by screws at one end near the connecting frame (22). A filter cylinder (32) is detachably connected to the filter plate (31), and a filter element (33) is provided inside the filter cylinder (32).

6. The retractable duct connection structure for coal mine ventilation according to claim 5, characterized in that: The filter cartridge (32) is threaded to one end with a filter cover (34). The filter element (33) is located between the filter cover (34) and the filter cartridge (32). After the filter cover (34) is tightened, it presses the filter element (33). The end of the filter cartridge (32) near the filter plate (31) is integrally formed with multiple sets of buckles. All sets of buckles are locked on the filter plate (31) and are interference-fitted with the filter plate (31).

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