Filtering device for ventilation pipe

Abstract

The filtering device comprises a circular ring, a limiting cover and a positioning mechanism, a supporting rod is arranged on the circular ring, a positioning column is arranged in the middle of the supporting rod, a circular hole is formed in the positioning column, external threads are formed in the outer surface of the positioning column, a filtering element is arranged on the positioning column in a sleeved mode, and an inserting rod is arranged on the limiting cover. A limiting groove is formed in the outer wall of the end, away from the limiting cover, of the inserting rod, the limiting cover is in threaded connection to the positioning column, the outer surface of the limiting cover abuts against the filter element, the inserting rod penetrates through the round hole and then horizontally extends forwards to the other side of the circular ring, and after the filter element is arranged on the positioning column in a sleeving mode, the limiting cover can be in threaded connection to the positioning column; the limiting treatment on the filter element is realized, and shaking or displacement caused by airflow impact when the air volume in the pipeline is relatively large is effectively prevented, so that the stability and the filtering effect are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a filtering device for ventilation pipes. Background Art

[0002] A ventilation duct is a municipal infrastructure for air circulation and reducing the concentration of harmful gases. At present, in order to better treat harmful gases, a filtering structure is added inside the ventilation duct to filter the discharged air in the duct. For this reason, the Chinese authorized utility model patent (Publication No.: CN220758370U) discloses a ventilation duct air filtering device. When the device filters air by using a filter element in the ventilation duct, an induced draft fan can be used to accelerate the filtering effect and ensure the ventilation volume of the discharge port. When cleaning the filter element, only the bolts on the arc-shaped mounting strip need to be removed to pull out the ring and remove the filter element, which is very convenient and does not require disassembling the duct, reducing the maintenance cost.

[0003] However, there are still some deficiencies in the above device during use: in this device, a positioning sleeve is installed at the center of the top of the filter element, and the filter element is sleeved and installed on a positioning post on the ring. Since the filter element is only fixed by being sleeved on the positioning post, when the air volume in the duct is large, the filter element is likely to shake, displace and fall due to the airflow impact, resulting in a decrease in the filtering effect and even possible failure. Therefore, a filtering device for ventilation pipes is proposed in view of the above situation. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defect that the filter element is easy to fall off from the positioning post in the prior art and affect the filtering effect, and to propose a filtering device for ventilation pipes.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A filtering device for ventilation pipes includes a ring, a limiting cover and a positioning mechanism. A support rod is arranged on the ring, and a positioning post is arranged at the middle part of the support rod.

[0007] The positioning post has a round hole, an external thread is provided on the outer surface of the positioning post, and a filter element is sleeved on the positioning post.

[0008] The limiting cover is provided with an insertion rod, a limiting groove is provided on the outer wall of the end of the insertion rod far away from the limiting cover, the limiting cover is threadedly connected to the positioning post, the outer surface of the limiting cover abuts against the filter element, and the insertion rod passes through the round hole and extends horizontally forward to the other side of the ring.

[0009] The positioning mechanism comprises a fixed block fixed on the support rod, a movable rod movably connected inside the fixed block, a spring is arranged on the movable rod, a positioning rod is arranged at one end of the spring, the positioning rod passes through the fixed block and extends outside the fixed block, a resistance block is arranged at the bottom of the movable rod, and the resistance block is clamped in the limit groove.

[0010] Preferably, a sleeve is provided at the middle of the filter core, and the filter core is sleeved on the positioning column through the sleeve.

[0011] Preferably, the limiting cover has a circular groove matched with the positioning column, an internal thread is arranged in the circular groove, and the insertion rod is arranged in the circular groove.

[0012] Preferably, a movable cavity is provided at the bottom of the fixed block, the movable rod is slidably matched with the movable cavity, and a through hole is provided on the outer surface of one side of the fixed block, the through hole is connected with the movable cavity, and the through hole is matched with the positioning rod.

[0013] Preferably, the movable rod is provided with a mounting groove, and the spring is arranged in the mounting groove.

[0014] Preferably, the outer wall of the abutment block fits with the inner wall of the limiting groove.

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

[0016] 1. The utility model adopts the structural design of the positioning column and the limiting cover. After the filter element is set on the positioning column, the limiting cover can be threadedly connected to the positioning column, thereby realizing the limiting treatment of the filter element, effectively preventing the filter element from shaking or displacement due to the impact of airflow when the air volume in the pipeline is large, thereby ensuring the stability and filtering effect.

[0017] 2. The structural design of the circular hole, the insertion rod, the limit groove and the positioning mechanism of the utility model can be further positioned by the positioning mechanism after the limit cover is tightened and the insertion rod passes through the circular hole, which can be used to prevent the limit cover from loosening due to pipeline vibration and then losing the limiting ability, thereby enhancing the vibration resistance of the device and further maintaining the stability and filtering effect during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of the filtering device;

[0019] Figure 2 is a schematic diagram of the structure of the filtering device;

[0020] Figure 3 It is a schematic diagram of the assembly structure of the filtering device;

[0021] Figure 4 It is a schematic diagram of the connection structure between the limit cover and the insertion rod;

[0022] Figure 5It is a structural schematic diagram of a positioning mechanism.

[0023] In the figure: 1, circular ring; 101, support rod; 102, positioning column; 1020, round hole; 2, filter element; 3, limit cover; 301, insertion rod; 3010, limit groove; 4, positioning mechanism; 401, fixed block; 4010, movable cavity; 4011, through hole; 402, movable rod; 4020, assembly groove; 403, spring; 404, positioning rod; 405, abutting block. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Referring to Figures 1-5 , a filtering device for a ventilation pipe, including a circular ring 1, a limit cover 3 and a positioning mechanism 4. A support rod 101 is arranged on the circular ring 1, and a positioning column 102 is arranged in the middle of the support rod 101.

[0026] The positioning column 102 has a round hole 1020, an external thread is provided on the outer surface of the positioning column 102, and a filter element 2 is sleeved on the positioning column 102.

[0027] Specifically, a sleeve is arranged in the middle of the filter element 2, and the filter element 2 is sleeved on the positioning column 102 through the sleeve.

[0028] The limit cover 3 is provided with an insertion rod 301. A limit groove 3010 is provided on the outer wall of the end of the insertion rod 301 far away from the limit cover 3. The limit cover 3 is threadedly connected to the positioning column 102. The outer surface of the limit cover 3 abuts against the filter element 2, and the insertion rod 301 extends horizontally forward to the other side of the circular ring 1 after passing through the round hole 1020.

[0029] As Figure 1 , Figure 3 and Figure 4 shown, the limit cover 3 has a circular groove matching the positioning column 102, an internal thread is provided in the circular groove, and the insertion rod 301 is arranged in the circular groove.

[0030] Furthermore, after the filter element 2 is sleeved, the insertion rod 301 is passed through the round hole 1020, and then the limit cover 3 is screwed. Through the cooperation of the internal thread and the external thread, the limit cover 3 is installed on the positioning column 102, realizing the limit treatment of the filter element 2, effectively preventing 9 from shaking or displacing due to the air flow impact when the air volume in the pipeline is large, thereby ensuring the stability and filtering effect of 9.

[0031] The positioning mechanism 4 has a fixed block 401 fixed on the support rod 101, and a movable rod 402 is movably connected inside the fixed block 401. A spring 403 is arranged on the movable rod 402. Specifically, the movable rod 402 has an assembly groove 4020, and the spring 403 is arranged in the assembly groove 4020. A positioning rod 404 is arranged at one end of the spring 403. The positioning rod 404 passes through the fixed block 401 and extends to the outside of the fixed block 401. A resistance block 405 is arranged at the bottom of the movable rod 402, and the resistance block 405 is clamped in the limiting groove 3010. Specifically, the outer wall of the resistance block 405 is in contact with the inner wall of the limiting groove 3010.

[0032] In this embodiment, Figure 5 As shown, a movable cavity 4010 is provided at the bottom of the fixed block 401, and the movable rod 402 is slidably matched with the movable cavity 4010. A through hole 4011 is provided on the outer surface of one side of the fixed block 401, and the through hole 4011 is connected to the movable cavity 4010 and matched with the positioning rod 404.

[0033] After the limit cover 3 is installed, the insertion rod 301 extends through the circular hole 1020 to the other side of the ring 1. At this time, the movable rod 402 is pulled downward so that the movable rod 402 slides down in the movable cavity 4010. At this time, due to the limitation of the movable cavity 4010, the positioning rod 404 squeezes the spring 403, and the spring 403 is in a contracted state. When the movable rod 402 drops to the contact block 405 and enters the limit groove 3010 and contacts the limit groove 3010, the positioning rod 404 moves to the through hole 4011, and the spring 403 is reset, so that the positioning rod 404 extends out through the through hole 4011, thereby positioning the movable rod 402, that is, ensuring the positioning of the contact block 405, which can be used to prevent the limit cover 3 from loosening due to pipeline vibration, thereby losing the limiting ability, thereby enhancing the vibration resistance of the device, and further maintaining the stability and filtering effect during use.

[0034] Furthermore, in this embodiment, the filter device is installed in the ventilation duct, and its installation method is the same as the installation method in the prior art (Announcement No.: CN220758370U), which will not be described in detail here.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter device for a ventilation pipe, comprising a ring (1), a support rod (101) being arranged on the ring (1), a positioning column (102) being arranged at the middle of the support rod (101), characterized in that: The positioning column (102) has a circular hole (1020), the outer surface of the positioning column (102) is provided with an external thread, and the positioning column (102) is sleeved with a filter element (2); The limit cover (3) is also comprised, wherein the limit cover (3) is provided with an insertion rod (301), and a limit groove (3010) is provided on the outer wall of one end of the insertion rod (301) away from the limit cover (3), the limit cover (3) is threadedly connected to the positioning column (102), the outer surface of the limit cover (3) is in contact with the filter element (2), and the insertion rod (301) passes through the circular hole (1020) and then extends horizontally forward to the other side of the circular ring (1); The invention also comprises a positioning mechanism (4), wherein the positioning mechanism (4) comprises a fixed block (401) fixed on the support rod (101), a movable rod (402) being movably connected inside the fixed block (401), a spring (403) being arranged on the movable rod (402), a positioning rod (404) being arranged at one end of the spring (403), the positioning rod (404) passing through the fixed block (401) and extending outside the fixed block (401), a resisting block (405) being arranged at the bottom of the movable rod (402), and the resisting block (405) being clamped in the limiting groove (3010).

2. A filter device for ventilation pipes according to claim 1, characterized in that: A sleeve is provided at the middle of the filter core (2), and the filter core (2) is sleeved on the positioning column (102) through the sleeve.

3. A filter device for ventilation pipe according to claim 1, characterized in that: The limiting cover (3) has a circular groove matched with the positioning column (102), an internal thread is arranged in the circular groove, and the insertion rod (301) is arranged in the circular groove.

4. A filter device for a ventilation pipe according to claim 1, characterized in that: The bottom of the fixed block (401) is provided with a movable cavity (4010), the movable rod (402) is slidably matched with the movable cavity (4010), and a through hole (4011) is provided on an outer surface of one side of the fixed block (401), the through hole (4011) is connected with the movable cavity (4010), and the through hole (4011) is matched with the positioning rod (404).

5. A filter device for ventilation pipes according to claim 1, characterized in that: The movable rod (402) is provided with a mounting groove (4020), and the spring (403) is arranged in the mounting groove (4020).

6. A filter device for a ventilation pipe according to claim 1, characterized in that: The outer wall of the abutment block (405) fits the inner wall of the limiting groove (3010).

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