Detachable dustproof filter equipment for coal mine ventilation pipeline

Abstract

The utility model discloses a detachable dustproof filter equipment of coal mine ventilation pipeline, especially relates to ventilation equipment technical field, including pipeline, both ends of pipeline are fixedly connected with flange, still include: two locating rings, fixedly connected in the pipeline surface, two groups of baffle ring, set up in the pipeline inner wall, jack, open in the locating ring with the pipeline, filter component, set up in the pipeline inboard, replacement component, the utility model discloses utilize bottom bar and bayonet joint cooperation, sleeve rotation drive pressure plate and suppress the positioning arc plate, realize the quick dismounting and stable fixation of positioning frame in the pipeline, conveniently take out the cleaning or replacement of filter screen, improve the filtering efficiency and operating continuity, utilize arc support arm to push baffle continuously simultaneously, realize one -way ventilation and prevent air back -in combination wind scooper conical structure, avoid dust secondary diffusion, improve the anti -return air capacity and security of ventilation system.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, and more specifically, to a detachable dust filter for coal mine ventilation ducts. Background Technology

[0002] Coal dust is generated during coal mining and transportation. Coal dust is very harmful to human health. Long-term inhalation of large amounts of coal dust can lead to pneumoconiosis. In addition, when the concentration of coal dust reaches a certain level, it can easily cause an explosion, posing a great safety hazard to mines. Ventilation systems, consisting of ventilation ducts and pressure-distributing fans, are mainly installed in locations with good air circulation. They are highly effective, consume little power, and are widely used in various mining operations.

[0003] In actual use, due to the continuous airflow impact and the resulting mechanical vibration in the pipeline, the clips for installing the filter screen are prone to loosening during use, causing the filter screen to be unable to maintain a reliable positioning state. Under ventilation conditions, it is easy to cause displacement or shaking, which in turn affects its dust interception effect, making it difficult for the filter screen to maintain a stable filtration efficiency during long-term operation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a detachable dust filter for coal mine ventilation ducts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A detachable dust filter for coal mine ventilation ducts includes a duct, both ends of which are fixedly connected to flanges, and further includes:

[0007] Two positioning rings are fixedly connected to the surface of the pipe;

[0008] Two sets of retaining rings are installed on the inner wall of the pipe;

[0009] An insertion hole is formed on the positioning ring and the pipe;

[0010] A filter assembly is disposed inside the pipe;

[0011] A replacement component is disposed between the pipe and the filter assembly for fixing the filter assembly;

[0012] An anti-backflow component is installed on the inner wall of the duct.

[0013] As a further description of the above technical solution: the filtering component includes:

[0014] Two positioning frames are respectively inserted into the inner side of the two sockets, and one end of each positioning frame extends to the outer side of the positioning ring;

[0015] Two sets of filter screens are fixedly connected to the inner sides of the two positioning frames respectively. The number of filter screens in each set is set to two. The two filter screens are arranged in a relatively rotated and staggered manner, so that the filter holes on the two filter screens are staggered in the airflow direction, which is used to increase the filtration area when the airflow passes through and improve the dust interception efficiency.

[0016] Two positioning arc plates are respectively fixedly connected to one side of the two positioning frames;

[0017] Multiple sets of bayonets are respectively opened on the surfaces of the two positioning arc plates, and the number of bayonets in each set is set to multiple, and they are respectively opened on both sides of the surface of the positioning arc plate;

[0018] Two sets of retaining rings are respectively disposed on both sides of the inner wall of the pipe, and there are two retaining rings in each set. They are used to axially limit the positioning frame to prevent the positioning frame from moving axially under the impact of airflow and to ensure the stable installation of the filter assembly in the pipe.

[0019] As a further description of the above technical solution: the replacement component includes multiple base rods, which are disposed on the surface of the pipe and located on both sides of the positioning ring. Each base rod is connected to the pipe by a hinge, and each base rod is engaged with the corresponding bayonet.

[0020] Each of the base rods is fitted with a sleeve, one end of each sleeve is fixedly connected to a handle, and the other end of each sleeve is fixedly connected to a pressure plate. The pressure plate is slidably fitted on the surface of the base rod and is used to press the surface of the positioning arc plate.

[0021] Each of the base rods has an external thread on its outer surface, and each of the sleeves has an internal thread on its inner wall. The external thread and the internal thread are threaded together.

[0022] Each of the base rods has a cavity on its inner side, one end of which is connected to the outer side of one end of the base rod. Each sleeve has a connecting rod fixedly connected inside, the distal end of which extends into the cavity. A limit block is fixedly connected to the distal end of the connecting rod, and the limit block slides into the cavity.

[0023] As a further description of the above technical solution: the anti-return air assembly includes:

[0024] An air guide hood is fixedly connected to the inner wall of the pipe. The air guide hood is a hollow cone shape. The inner diameter of the large end of the cone is equal to the inner diameter of the pipe, and the inner diameter of the small end of the cone is not less than two-thirds of the inner diameter of the pipe.

[0025] A baffle is hinged to one end of the air guide shroud;

[0026] An arc-shaped support arm is rotatably connected to the surface of the air guide shroud. One end of the arc-shaped support arm extends to the inside of the air guide shroud and abuts against one side of the baffle. The bottom end of the arc-shaped support arm extends to the outside of the air guide shroud. A pressure block is rotatably connected to the bottom end of the arc-shaped support arm. The pressure block drives the top end of the arc-shaped support arm to continuously push one side of the baffle by gravity.

[0027] The technical effects and advantages of this utility model are as follows:

[0028] 1. By setting up filter components and replacement components, compared with the existing technology, the positioning frame can be quickly disassembled and stably fixed in the pipeline by using the snap-fit ​​between the bottom rod and the bayonet, combined with the rotation of the sleeve to drive the pressure plate to press the positioning arc plate. This allows the filter screen to be easily removed for cleaning or replacement, while maintaining the reliable positioning of the filter components in the ventilation state, which facilitates maintenance and improves the continuous operation and filtration efficiency of the ventilation and dust removal equipment.

[0029] 2. By setting up an anti-backflow component, compared with existing technologies, the continuous pushing of the baffle on one side by the arc-shaped support arm, combined with the conical structure of the air guide hood, can achieve unidirectional ventilation and prevent backflow of airflow, so that the airflow direction in the duct remains stable, avoiding secondary diffusion of dust caused by backflow, thus playing a role in ensuring ventilation safety and improving the backflow prevention capability of the ventilation system. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the right side of the present invention.

[0032] Figure 3 This is a partial schematic diagram of the connection between the pipe and the retaining ring of this utility model.

[0033] Figure 4 This is a partial schematic diagram of the connection between the positioning frame and the positioning arc plate of this utility model.

[0034] Figure 5 This is a partial schematic diagram of the connection between the air guide cover and the baffle of this utility model.

[0035] Figure 6 This is a partial schematic diagram of the connection between the base rod and the sleeve of this utility model.

[0036] Figure 7 This is a partial schematic diagram of the connection between the sleeve and the throttle of this utility model.

[0037] Figure 8This is a schematic diagram of the base rod structure of this utility model.

[0038] Figure 9 For the present utility model Figure 5 Enlarged diagram of point A in the middle.

[0039] The attached diagram is labeled as follows: 1. Pipe; 2. Flange; 3. Positioning ring; 4. Retaining ring; 5. Positioning frame; 6. Filter screen; 7. Positioning arc plate; 8. Bayonet; 9. Base rod; 10. Sleeve; 11. Rotary handle; 12. Pressure plate; 13. Connecting rod; 14. Limiting block; 15. Air guide hood; 16. Baffle; 17. Arc-shaped support arm; 18. Pressure block. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0041] Example 1:

[0042] The embodiments disclosed in this application are as follows: Figures 1-9 The detachable dust filter for coal mine ventilation ducts shown includes a duct 1, with flanges 2 fixedly connected to both ends of the duct 1, and also includes:

[0043] Two positioning rings 3 are fixedly connected to the surface of pipe 1;

[0044] Two sets of retaining rings 4 are installed on the inner wall of pipe 1;

[0045] An insertion hole is formed on the positioning ring 3 and the pipe 1;

[0046] The filter assembly is located inside pipe 1;

[0047] The replacement component is located between pipe 1 and the filter component to fix the filter component in place;

[0048] A backflow prevention component is installed on the inner wall of duct 1;

[0049] The filtering components include:

[0050] Two positioning frames 5 are respectively inserted into the inner side of two sockets, and one end of each positioning frame 5 extends to the outer side of the positioning ring 3.

[0051] Two sets of filters 6 are fixedly connected to the inside of two positioning frames 5. The number of filters 6 in each set is set to two. The two filters 6 are relatively rotated and staggered, so that the filter holes on the two filters 6 are staggered in the airflow direction.

[0052] Two positioning arc plates 7 are fixedly connected to one side of the two positioning frames 5 respectively;

[0053] Multiple sets of bayonets 8 are respectively opened on the surfaces of two positioning arc plates 7. The number of bayonets 8 in each set is set to multiple, and they are respectively opened on both sides of the surface of the positioning arc plate 7.

[0054] Two sets of retaining rings 4 are respectively set on both sides of the inner wall of the pipe 1, and there are two retaining rings 4 in each set, which are used to axially limit the positioning frame 5.

[0055] The replacement component includes multiple base rods 9, which are disposed on the surface of the pipe 1 and located on both sides of the positioning ring 3. Each base rod 9 is connected to the pipe 1 by a hinge, and each base rod 9 is engaged with the corresponding bayonet 8.

[0056] Each base rod 9 is fitted with a sleeve 10, and a handle 11 is fixedly connected to one end of each sleeve 10. A pressure plate 12 is fixedly connected to the other end of each sleeve 10. The pressure plate 12 is slidably fitted on the surface of the base rod 9 and is used to press the surface of the positioning arc plate 7.

[0057] Each base rod 9 has an external thread on its outer surface, and each sleeve 10 has an internal thread on its inner wall. The external thread and the internal thread are connected by a thread.

[0058] Each base rod 9 has a cavity on its inner side, with one end of the cavity connected to the outer side of one end of the base rod 9. Each sleeve 10 has a connecting rod 13 fixedly connected inside, with the distal end of the connecting rod 13 extending into the cavity. The distal end of the connecting rod 13 is fixedly connected to a limiting block 14, which slides with the cavity.

[0059] The implementation principle of this embodiment is as follows: During the installation and operation of the equipment, both the filter component and the replacement component are located on the fan side outside the mine tunnel, and they cooperate to operate in the following manner;

[0060] First, two positioning frames 5 are inserted into the pipe 1 from the outside through the insertion holes. Two sets of filter screens 6 are fixed to the inside of each positioning frame 5. The two filter screens 6 in each set are arranged in a relatively rotated and staggered manner, so that the filter holes on the two filter screens 6 are staggered in the airflow direction to increase the filtration area. After the positioning frame 5 is inserted into place, one end extends to the outside of the positioning ring 3, and the positioning arc plate 7 fixedly connected to the other end is located near the positioning ring 3. Simultaneously, the retaining ring 4 installed on the inner wall of the pipe 1 limits the axial movement of the positioning frame 5 to prevent it from over-inserting.

[0061] Subsequently, the replacement components are fixed. Multiple base rods 9 are connected to the surface of the pipe 1 by hinges and are located on both sides of the positioning ring 3. In the initial state, the base rods 9 are in the open state. After the positioning arc plate 7 is in place, the base rods 9 are rotated inward towards the inside of the pipe 1 so that the base rods 9 are engaged in the slots 8 opened on the surface of the positioning arc plate 7. Each base rod 9 and the corresponding slot 8 form a snap-fit ​​engagement to achieve initial positioning.

[0062] Next, the operator rotates the handle 11 at one end of the sleeve 10. The internal thread on the inner wall of the sleeve 10 engages with the external thread on the outer surface of the base rod 9. As the sleeve 10 rotates, the sleeve 10 moves axially along the base rod 9. The pressure plate 12, which is fixedly connected to the other end of the sleeve 10, slides accordingly and gradually comes into contact with and presses against the surface of the positioning arc plate 7.

[0063] At the same time, the connecting rod 13 fixedly connected inside the sleeve 10 moves with the sleeve 10, and the limiting block 14 at its far end slides in the cavity inside the bottom rod 9 to prevent the sleeve 10 from detaching from the bottom rod 9.

[0064] Under the continuous pressure of the pressure plate 12, the positioning arc plate 7 is firmly pressed, thereby fixing the positioning frame 5 inside the pipe 1. The filter screen 6 is in the working position to filter the dust in the airflow passing through the pipe 1.

[0065] When it is necessary to clean or replace the filter screen 6, rotate the sleeve 10 in the opposite direction to disengage the pressure plate 12 from the positioning arc plate 7, and then deflect the bottom rod 9 out of the bayonet 8 to pull the positioning frame 5 out of the insertion hole for quick disassembly.

[0066] The linkage mechanism of the bottom rod 9 and the bayonet 8, and the sleeve 10 driving the pressure plate 12 to press, enables the filter assembly to be detachably fixed, which is convenient for maintenance. At the same time, it ensures the stable positioning of the filter assembly under ventilation conditions and improves the filtration efficiency.

[0067] Example 2:

[0068] Based on Example 1, this example discloses a detachable dust filter for coal mine ventilation ducts, referring to... Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, the backflow prevention assembly includes:

[0069] The air guide shroud 15 is fixedly connected to the inner wall of the pipe 1. The air guide shroud 15 is a hollow cone shape. The inner diameter of the large end of the cone of the air guide shroud 15 is equal to the inner diameter of the pipe 1, and the inner diameter of the small end of the cone is not less than two-thirds of the inner diameter of the pipe 1.

[0070] Baffle 16 is hinged to one end of air guide shroud 15;

[0071] An arc-shaped support arm 17 is rotatably connected to the surface of the air guide shroud 15. One end of the arc-shaped support arm 17 extends to the inside of the air guide shroud 15 and abuts against one side of the baffle 16. The bottom end of the arc-shaped support arm 17 extends to the outside of the air guide shroud 15. A pressure block 18 is rotatably connected to the bottom end of the arc-shaped support arm 17. The pressure block 18 drives the top end of the arc-shaped support arm 17 to continuously push one side of the baffle 16 by gravity.

[0072] The implementation principle of this embodiment is as follows: Under the normal operation and shutdown states of the ventilation equipment, the anti-backflow component works in the following manner;

[0073] The air guide shroud 15 is fixedly connected to the inner wall of the pipe 1. It is hollow cone in shape, with the small end of the cone facing downstream of the airflow direction. The baffle 16 is connected to one end of the air guide shroud 15, i.e. the small end of the cone, by a hinge. The arc-shaped support arm 17 is rotatably connected to the surface of the air guide shroud 15. One end of the arc-shaped support arm 17 extends to the inner side of the air guide shroud 15 and abuts against one side of the baffle 16. The bottom end of the arc-shaped support arm 17 extends to the outer side of the air guide shroud 15 and is rotatably connected to the pressure block 18.

[0074] When the ventilation system is operating normally, the airflow flows from upstream to downstream along the duct 1. When the airflow passes through the air guide shroud 15, it generates a positive thrust on the baffle 16. The airflow pushes the baffle 16 to rotate around the hinge to the open state. The surface of the baffle 16 is close to the inner wall of the duct 1. Combined with its air-guiding arc surface, the local resistance coefficient of the airflow is reduced to below 0.3. At the same time, the conical structure of the air guide shroud 15 adopts a large cross-section transition design, with the inner diameter of the small end being more than two-thirds of the inner diameter of the duct, avoiding the formation of obvious necking. Compared with the wind resistance generated by the filter assembly, the additional wind resistance of the anti-return air assembly under normal operating conditions does not exceed 10% of the wind resistance of the filter assembly, and will not cause the operating point of the main ventilation fan to shift. At this time, the pressure block 18 is in a certain position under gravity drive, and the torque transmitted through the arc-shaped support arm 17 is small and insufficient to prevent the baffle 16 from opening.

[0075] When the ventilation system stops or reverse airflow occurs, the downstream air pressure increases or the upstream air pressure decreases, and the baffle 16 is subjected to reverse pressure. At this time, the gravity of the pressure block 18 is transmitted through the bottom end of the arc-shaped support arm 17, driving the top end of the arc-shaped support arm 17 to continuously abut against one side of the baffle 16, applying an auxiliary thrust to the baffle 16 in the closing direction. At the same time, the reverse airflow itself pushes the baffle 16 to move in the closing direction until the baffle 16 is completely in contact with the end face of the air guide shroud 15, blocking the reverse airflow.

[0076] The rotating connection structure between the arc-shaped support arm 17 and the pressure block 18 allows the pressure block 18 to automatically adjust its center of gravity position according to the equipment installation angle, thereby always maintaining a unidirectional pushing effect on the baffle 16.

[0077] The conical guidance of the air guide hood 15, the one-way hinge of the baffle 16, and the continuous contact between the arc-shaped support arm 17 and the pressure block 18 achieve a reliable anti-backflow function, avoid secondary dust diffusion caused by backflow, and ensure the safe operation of the ventilation system.

[0078] The working principle of this utility model is as follows: the bottom rod 9 in the replacement component is engaged with the bayonet 8, and the sleeve 10 drives the pressure plate 12 to press the positioning arc plate 7, thereby fixing the positioning frame 5 and the filter screen 6 in the filter component to the inside of the pipe 1; the arc-shaped support arm 17 in the anti-backflow component cooperates with the pressure block 18 to continuously push the baffle 16 to abut against the air guide cover 15 to prevent reverse airflow.

[0079] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, nor will they be described here.

[0080] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detachable dust filter for coal mine ventilation ducts, comprising a duct (1), wherein flanges (2) are fixedly connected to both ends of the duct (1), characterized in that, Also includes: Two positioning rings (3) are fixedly connected to the surface of the pipe (1); Two sets of retaining rings (4) are installed on the inner wall of the pipe (1); Insertion holes are formed on the positioning ring (3) and the pipe (1); A filter assembly is disposed inside the pipe (1); A replacement component is disposed between the pipe (1) and the filter component for fixing the filter component; An anti-backflow component is installed on the inner wall of the pipe (1).

2. The detachable dust filter for coal mine ventilation ducts according to claim 1, characterized in that, The filtering component includes: Two positioning frames (5) are respectively inserted into the inner side of the two sockets, and one end of each positioning frame (5) extends to the outside of the positioning ring (3); Two sets of filters (6) are fixedly connected to the inner sides of the two positioning frames (5), and the number of filters (6) in each set is set to two. The two filters (6) are arranged in a relatively rotated and staggered manner, so that the filter holes on the two filters (6) are staggered in the airflow direction. Two positioning arc plates (7) are fixedly connected to one side of the two positioning frames (5); Multiple sets of bayonets (8) are respectively opened on the surfaces of the two positioning arc plates (7). The number of bayonets (8) in each set is set to multiple, and they are respectively opened on both sides of the surface of the positioning arc plate (7).

3. The detachable dust filter for coal mine ventilation ducts according to claim 2, characterized in that, The replacement component includes multiple base rods (9), which are disposed on the surface of the pipe (1) and located on both sides of the positioning ring (3). Each base rod (9) is connected to the pipe (1) by a hinge, and each base rod (9) is engaged with the corresponding bayonet (8).

4. The detachable dust filter for coal mine ventilation ducts according to claim 3, characterized in that, Each of the base rods (9) is fitted with a sleeve (10), and a throttle (11) is fixedly connected to one end of each sleeve (10). A pressure plate (12) is fixedly connected to the other end of each sleeve (10). The pressure plate (12) slides on the surface of the base rod (9) and is used to press the surface of the positioning arc plate (7).

5. The detachable dust filter for coal mine ventilation ducts according to claim 4, characterized in that, Each of the bottom rods (9) has an external thread on its outer surface, and each of the sleeves (10) has an internal thread on its inner wall. The external thread and the internal thread are threaded together.

6. The detachable dust filter for coal mine ventilation ducts according to claim 4, characterized in that, Each of the bottom rods (9) has a cavity on its inner side. One end of the cavity is connected to the outer side of one end of the bottom rod (9). Each sleeve (10) has a connecting rod (13) fixedly connected inside. The far end of the connecting rod (13) extends into the cavity. The far end of the connecting rod (13) is fixedly connected to a limiting block (14). The limiting block (14) slides with the cavity.

7. The detachable dust filter for coal mine ventilation ducts according to claim 1, characterized in that, The backflow prevention component includes: The air guide hood (15) is fixedly connected to the inner wall of the pipe (1). The air guide hood (15) is a hollow cone shape. The inner diameter of the large cone end of the air guide hood (15) is equal to the inner diameter of the pipe (1), and the inner diameter of the small cone end is not less than two-thirds of the inner diameter of the pipe (1). A baffle (16) is hinged to one end of the air guide shroud (15); An arc-shaped support arm (17) is rotatably connected to the surface of the air guide shroud (15). One end of the arc-shaped support arm (17) extends to the inside of the air guide shroud (15) and abuts against one side of the baffle (16). The bottom end of the arc-shaped support arm (17) extends to the outside of the air guide shroud (15). A pressure block (18) is rotatably connected to the bottom end of the arc-shaped support arm (17). The pressure block (18) drives the top end of the arc-shaped support arm (17) to continuously push one side of the baffle (16) by gravity.

8. The detachable dust filter for coal mine ventilation ducts according to claim 2, characterized in that, The two sets of retaining rings (4) are respectively set on both sides of the inner wall of the pipe (1), and there are two retaining rings (4) in each set, which are used to axially limit the positioning frame (5).

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