Rotating device of collecting pipe of air filter testboard for general ventilation

Abstract

The utility model discloses a rotating device of a collecting pipe of an air filter test board for general ventilation, which comprises a test section pipeline, a sampling head is arranged in the test section pipeline, a mounting hole is formed in the test section pipeline, a shaft sleeve is mounted in the mounting hole, a supporting block is mounted below the test section pipeline, and a rotating shaft is mounted in the shaft sleeve. A base is installed at the bottom of the shaft sleeve, one end of the sampling head is installed in the base, a connecting pipe is installed at the bottom of the base, a rotating assembly is installed on one side of the supporting block, and the rotating assembly is connected with the shaft sleeve. In the prior art, the collection head and the particle counter are polluted to a certain degree, so that the accuracy of the result of subsequently testing the filtering efficiency of other products is reduced, while the collection head is covered by a cover in the existing method, but the mode lacks certain continuity, and the accuracy of the result is reduced. And the accuracy is easily reduced due to the fact that the air tightness in the whole equipment is influenced by opening a test section pipeline.

Description

Technical Field

[0001] This utility model relates to the field of air filter performance testing technology, and in particular to a rotating device for the collection tube of a test bench for general ventilation air filters. Background Technology

[0002] A general ventilation air filter test bench is a device used to test the performance of general ventilation air filters. It can test filtration efficiency, resistance, air volume, and dust holding capacity. It consists of multiple sections of pipe, including inlet pipe, outlet pipe, and test section pipe. The pipe system is used to guide air flow, provide a stable airflow environment for the filter, and ensure the uniformity and stability of airflow during the test.

[0003] A sampling head for collecting airborne particle concentration is installed inside the test section duct. Below the sampling head is a particle counter for counting. The filter material to be tested is also installed inside the test section duct and located at the front end of the sampling head. After a filter material is installed, it usually needs to be tested for filtration efficiency, resistance, airflow, and dust holding capacity before it can be removed.

[0004] However, current tests require a sampling head to sample and count airborne particles in filtration efficiency tests, while dust holding capacity tests do not require a sampling head. However, existing sampling heads cannot change direction automatically and are always facing the wind. In dust holding capacity tests, due to the high concentration of airborne particles, the sampling head and particle counter are contaminated, leading to reduced accuracy in subsequent tests. The current method is to cover the sampling head with a lid, but this method lacks consistency, and opening the test section pipe affects the airtightness of the entire equipment, which can easily reduce accuracy. Utility Model Content

[0005] This application provides a rotating device for the collection tube of a general ventilation air filter test bench, which can solve the problem that in the dust holding capacity test, the high concentration of particles in the air will cause some contamination to the collection head and particle counter, resulting in a decrease in the accuracy of the filtration efficiency results of subsequent tests of other products. The current method is to cover the collection head with a cover, but this method lacks a certain continuity, and opening the test section pipe affects the airtightness of the entire equipment, which can easily lead to a decrease in accuracy.

[0006] This application provides a rotating device for the collection pipe of a general ventilation air filter test bench, including a test section pipe, a sampling head disposed within the test section pipe, an installation hole provided in the test section pipe, a bushing installed within the installation hole, a support block installed below the test section pipe, one end of the bushing located within the support block, a base installed at the bottom of the bushing, one end of the sampling head inserted through the bushing and passing through the bushing into the base, a plurality of slots provided within the bushing, and a number of locking blocks corresponding to the number of slots fixedly connected to the sampling head, the locking blocks being able to engage with the slots, a connecting pipe installed at the bottom of the base, and a rotating assembly installed on one side of the support block, the rotating assembly being connected to the bushing.

[0007] Furthermore, a sealing block is fixedly connected inside the bushing, and the sealing block fits against the bushing and the sampling head.

[0008] Furthermore, one end of the sampling head is inclined, and a groove is provided in the base to match the inclined part of the sampling head. A sealing ring is fixedly connected in the base.

[0009] Furthermore, a T-shaped pipe is provided below the connecting pipe. The first end of the T-shaped pipe is connected to the connecting pipe, and an electronic valve is fixedly connected to the second and third ends of the T-shaped pipe. One side of the electronic valve is fixedly connected to the particle counter, and the other side of the electronic valve is fixedly connected to the air pump.

[0010] Furthermore, the rotating assembly includes gear one, gear two, a servo motor, and a mounting plate. One end of the support block has an opening. The mounting plate is fixedly connected to the support plate and is located on the side of the opening. The servo motor is mounted on the mounting plate. Gear one is mounted on the servo motor. Gear two is mounted on the bushing. Gear one and gear two mesh. A reinforcing rib is installed between the mounting plate and the support block.

[0011] In summary, the beneficial effects of the rotating device for the collection pipe of the general ventilation air filter test bench in this application are:

[0012] 1. During dust holding capacity testing, the rotating component drives the bushing and sampling head to rotate, preventing the sampling head from facing the wind and preventing high-concentration particles from entering the sampling head and particle counter, thus avoiding contamination. This ensures accurate results when testing the filtration efficiency of other products, improving the reliability and validity of the test data.

[0013] 2. Abandoning the traditional method of covering the sampling head with a cap, the direction of the sampling head is directly changed by a rotating device, eliminating the need to open the test section pipeline for additional operations. This makes the testing process more continuous and smooth, improves testing efficiency, reduces manual intervention, and enhances testing continuity.

[0014] 3. There is no need to open the test section pipeline to cover the sampling head, which effectively avoids the problem of damaging the airtightness of the equipment due to frequent opening and closing of the pipeline, ensures the uniformity and stability of the airflow during the test, makes the test results more accurate, reduces the test error caused by airtightness problems, and ensures the airtightness of the equipment. Attached Figure Description

[0015] Figure 1 A perspective view of the utility model;

[0016] Figure 2 This is a side sectional view of the utility model;

[0017] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0018] Figure 4 This is a schematic diagram of the slot and block structure in the sampling head and bushing of the utility model.

[0019] Reference numerals: 1. Test section pipe; 2. Sampling head; 3. Mounting hole; 4. Bushing; 5. Support block; 6. Base; 7. Slot; 8. Locking block; 9. Connecting pipe; 10. Rotating assembly; 11. Sealing block; 12. Groove; 13. Sealing ring; 14. T-pipe; 15. Electronic valve; 16. Air pump; 101. Gear one; 102. Gear two; 103. Servo motor; 104. Mounting plate. Detailed Implementation

[0020] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

[0021] like Figures 1 to 4As shown, the rotating device of the collection pipe of a general ventilation air filter test bench includes a test section pipe 1, a sampling head 2 installed inside the test section pipe 1, an installation hole 3 on the test section pipe 1, a bushing 4 installed inside the installation hole 3, the bushing 4 being rotatably connected to the installation hole 3, one end of the bushing 4 being flush with the inside of the test section pipe 1, a support block 5 fixedly connected to the bottom of the test section pipe 1, a base 6 installed inside the support block 5, the other end of the bushing 4 extending into the support block 5 and rotatably connected to the base 6, one end of the sampling head 2 being disassembled from the bushing 4 and passing through the entire bushing 4 into the base 6, a number of slots 7 being provided inside the bushing 4, the slots 7 being arranged in a ring, a locking block 8 corresponding to the number of slots 7 inside the bushing 4 being fixedly connected to the sampling head 2, the locking block 8 cooperating with the slots 7, a rotating device installed on one side of the support block 5, the rotating device being connected to the bushing 4, the rotating device being able to drive the bushing 4 to rotate.

[0022] Furthermore, a sealing block 11 is installed between the bushing 4 and the sampling head 2, and a sealing ring 13 is installed between the base 6 and the sampling head 2. The sealing block 11 and the sealing ring 13 not only increase the sealing performance, but also increase the friction and increase the stability of the sampling head 2 at the connection. The end of the sampling head 2 that is inserted into the base 6 is inclined. A groove 12 is provided in the base 6. The shape of the groove 12 is the same as the shape of the sampling head 2. The inclination of the sampling head 2 makes it easier for the sampling head 2 to be inserted from the sealing block 11 and the sealing ring 13.

[0023] Furthermore, a three-way pipe 14 is provided below the connecting pipe 9. The first end of the three-way pipe 14 is installed on the connecting pipe 9. An electronic valve 15 is installed on the second end and the third end of the three-way pipe 14, respectively. The other end of the electronic valve 15 at the second end is fixedly connected to the particle counter, and the other end of the electronic valve 15 at the third end is fixedly connected to the air pump 16.

[0024] The rotating assembly 10 includes a first gear 101, a second gear 102, a servo motor 103, and a mounting plate 104. An opening is provided on one side of the support block 5, and a mounting plate 104 is fixedly connected to the opening. The servo motor 103 is mounted on the mounting plate 104. The first gear 101 is fixedly connected to the output shaft of the servo motor 103. The second gear 102 is fixedly connected to the bushing 4. The first gear 101 and the second gear 102 mesh. The servo motor 103 can drive the first gear 101 to rotate, thereby driving the second gear 102 to rotate. The second gear 102 drives the bushing 4 to rotate, thereby driving the sampling head 2 to rotate. A reinforcing rib is provided on each side of the mounting plate 104. One end of the reinforcing rib is fixedly connected to the mounting plate 104, and the other end of the reinforcing rib is fixedly connected to the support block 5.

[0025] Working principle of the utility model: When a dust holding capacity test is required, the servo motor 103 drives the gear 101 to rotate, the gear 101 drives the gear 2 to rotate, the gear 2 drives the bushing 4 to rotate, thereby causing the bushing 4 to rotate. The bushing 4 then drives the sampling head 2 to rotate 180°, so that the sampling head 2 changes from the original facing side to the leeward side. At the same time, the electronic valve 15 on the second end of the three-way pipe 14 closes, and the electronic valve 15 on the third end of the three-way pipe 14 opens. The air pump 16 starts to blow air, so that air is continuously blown out of the sampling head 2, which can more stably keep the sampling head 2 clean.

Claims

1. A rotating device for the collection pipe of a general ventilation air filter test bench, comprising a test section pipe (1), wherein a sampling head (2) is provided inside the test section pipe (1), characterized in that, The test section pipe (1) has an installation hole (3) inside, and a bushing (4) is installed inside the installation hole (3). A support block (5) is installed below the test section pipe (1). One end of the bushing (4) is located inside the support block (5). A base (6) is installed at the bottom of the bushing (4). One end of the sampling head (2) is inserted into the bushing (4) and passes through the bushing (4) before entering the base (6). Several slots (7) are provided inside the bushing (4). A number of locking blocks (8) corresponding to the number of slots (7) are fixedly connected to the sampling head (2). The locking blocks (8) can be locked into the slots (7). A connecting pipe (9) is installed at the bottom of the base (6). A rotating component (10) is installed on one side of the support block (5). The rotating component (10) is connected to the bushing (4).

2. The rotating device for the collection pipe of the general ventilation air filter test bench according to claim 1, characterized in that, A sealing block (11) is fixedly connected inside the bushing (4), and the sealing block (11) fits against the bushing (4) and the sampling head (2).

3. The rotating device for the collection pipe of the general ventilation air filter test bench according to claim 2, characterized in that, One end of the sampling head (2) is inclined, and a groove (12) that matches the inclined part of the sampling head (2) is provided in the base (6). A sealing ring (13) is fixedly connected in the base (6).

4. The rotating device for the collection pipe of the general ventilation air filter test bench according to claim 3, characterized in that, A three-way pipe (14) is provided below the connecting pipe (9). The first end of the three-way pipe (14) is connected to the connecting pipe (9). An electronic valve (15) is fixedly connected to the second end and the third end of the three-way pipe (14). The electronic valve (15) on one side is fixedly connected to the particle counter, and the electronic valve (15) on the other side is fixedly connected to the air pump (16).

5. The rotating device for the collection pipe of the general ventilation air filter test bench according to claim 1, characterized in that, The rotating assembly (10) includes a first gear (101), a second gear (102), a servo motor (103), and a mounting plate (104). One end of the support block (5) has an opening. The mounting plate (104) is fixedly connected to the support plate, and the mounting plate (104) is located on the side of the opening. The servo motor (103) is mounted on the mounting plate (104). The first gear (101) is mounted on the servo motor (103). The second gear (102) is mounted on the bushing (4). The first gear (101) and the second gear (102) mesh. A reinforcing rib is installed between the mounting plate (104) and the support block (5).

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