A device for preventing clogging of the sampling head of an extractable ultra-low dust meter

Abstract

This utility model relates to the field of gas monitoring equipment, specifically an anti-clogging device for the sampling head of an extractable ultra-low dust meter. It includes a sampling tube, a filter tube, a coarse filter, a piston rod, a dust scraper, a backflushing assembly, and a "T"-shaped handle. By setting coarse and fine filters, the gas is filtered in stages, improving the filtration effect and reducing the risk of clogging of the dust meter sampling head. An "L"-shaped nozzle backflushes the inner wall of the sampling tube and the fine filter, preventing clogging of the fine filter and ensuring long-term stable operation of the sampling head. The entire device has a compact structure and reasonable connections between components. Dust scraping and backflushing operations can be simultaneously achieved by pushing the "T"-shaped handle, making operation simple and convenient and reducing the labor intensity of workers.

Description

Technical Field

[0001] This utility model relates to the field of gas monitoring equipment, specifically an anti-clogging device for the sampling head of an extractable ultra-low dust meter. Background Technology

[0002] With the acceleration of global industrialization and the increasing number of industrial production activities, dust pollution has become a prominent problem. Dust not only severely damages the atmospheric environment, such as forming smog and reducing visibility, but also poses a significant threat to human health. Long-term exposure to high concentrations of dust can lead to various health problems, including respiratory and cardiovascular diseases. Therefore, accurate and timely monitoring of dust concentrations in the environment is crucial for environmental protection and public health. Extractive ultra-low dust meters, as an important environmental monitoring device, can measure the concentration of dust in the air in real time and accurately, providing key data support for environmental protection departments to formulate pollution control measures and for enterprises to carry out pollution control. The demand for their application has shown a rapid growth trend in recent years.

[0003] In the actual use of extraction-type ultra-low dust meters, the sampling head, as a key component that directly contacts the gas being measured and collects dust samples, faces a serious clogging problem. This is mainly due to the complex and diverse environments at the work site, where the air often contains a large number of dust particles of different sizes and properties. When the gas being measured passes through the sampling head, these dust particles and impurities easily accumulate on the surface of the filter screen and the inner wall of the pipe. Especially under conditions of high dust concentration, dust is more likely to adhere to the inside of the sampling head, causing the sampling channel to gradually narrow or even become completely blocked.

[0004] Therefore, an anti-clogging device for the sampling head of an extractable ultra-low dust meter is provided to address the above-mentioned problems. Utility Model Content

[0005] This invention addresses the problem of clogging in traditional dust meter sampling heads, which leads to increased equipment downtime and maintenance, thereby affecting the accuracy and reliability of monitoring data. It provides a clogging-resistant device for the sampling head of an extractable ultra-low dust meter.

[0006] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0007] This utility model provides an anti-clogging device for the sampling head of an extractable ultra-low dust meter, including a sampling tube. A filter tube is connected to the lower end of the sampling tube. A coarse filter screen is fixedly connected to the lower end of the filter tube by bolts. A piston rod is slidably installed in the middle of the upper end of the filter tube. A dust scraper is screwed to the end of the piston rod that extends into the filter tube. A back-blowing component is fixedly connected to the upper end of the piston rod. A "T"-shaped handle is fixedly connected to the upper end of the back-blowing component.

[0008] Furthermore, a flange for connecting the sampling tube and the dust collector is fixedly installed at the upper end of the sampling tube.

[0009] Furthermore, a fine filter screen is provided at the lower end of the sampling tube and the connection point with the filter tube.

[0010] Furthermore, a rubber gasket is provided at the lower end of the filter tube to increase the airtightness between the filter tube and the coarse filter screen.

[0011] Furthermore, the dust scraper blade and the inner wall of the filter tube are in sliding fit.

[0012] Furthermore, the backflush assembly includes a suction pump fixedly connected to the upper end of the piston rod, a one-way air inlet valve installed at the inlet of the suction pump, a one-way air outlet valve installed at the outlet of the suction pump, and a flexible air guide tube connected to the end of the one-way air outlet valve.

[0013] Furthermore, the backflush assembly also includes a transition ring disposed on the outside of the sampling tube. The transition ring has a hollow structure inside and forms a transition air chamber. "L"-shaped nozzles are uniformly installed on the inner wall of the transition air chamber along its circumferential direction. The lower end of the "L"-shaped nozzles extends close to the inner wall of the sampling tube. The end of the flexible air guide tube away from the one-way air outlet valve is connected to the inside of the transition air chamber.

[0014] Furthermore, an arc-shaped plate is symmetrically installed on the upper end face of the filter tube and on both sides of the piston rod. A limiting groove is opened in the middle of the arc-shaped plate, and a one-way air inlet valve and a one-way air outlet valve are respectively slidably installed in the limiting groove.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0016] The positive and progressive effects of this utility model are as follows:

[0017] By using coarse and fine filters to perform graded filtration of the gas, the filtration effect is improved, and the risk of dust meter sampling head clogging is reduced. The design of the dust scraper can promptly remove impurities from the inner wall of the filter tube and the lower surface of the fine filter, preventing the fine filter from clogging. The back-flushing component uses an "L"-shaped nozzle to back-flush the inner wall of the sampling tube and the fine filter, further preventing the fine filter from clogging and ensuring that the sampling head can operate stably for a long time. The entire device has a compact structure and reasonable connections between components. Dust scraping and back-flushing operations can be performed simultaneously by pushing the "T"-shaped lever, making operation simple and convenient and reducing the labor intensity of the staff. Attached Figure Description

[0018] Figure 1 This is a first three-dimensional structural diagram of the present invention.

[0019] Figure 2 In this utility model Figure 1A magnified structural diagram at point A.

[0020] Figure 3 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0021] Figure 4 This is a cross-sectional perspective view of the connection between the sampling tube, filter tube, piston rod, and dust scraper in this utility model.

[0022] Figure 5 In this utility model Figure 4 A magnified structural diagram at point B.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Sampling tube; 11. Flange; 12. Fine filter screen;

[0025] 2. Filter tube; 21. Rubber gasket;

[0026] 3. Bolts; 4. Coarse filter screen; 5. Piston rod; 6. Dust scraper;

[0027] 7. Backflush assembly; 71. Air pump; 72. One-way air inlet valve; 73. One-way air outlet valve; 74. Flexible air guide tube; 75. Transition ring; 76. "L" shaped nozzle;

[0028] 8. T-shaped handlebar; 9. Curved plate; 10. Limiting groove. Detailed Implementation

[0029] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0030] like Figures 1 to 5 As shown, an anti-clogging device for the sampling head of an extractable ultra-low dust meter includes a sampling tube 1. The lower end of the sampling tube 1 is connected to a filter tube 2. The lower end of the filter tube 2 is fixedly connected to a coarse filter screen 4 by bolts 3. A piston rod 5 is slidably installed in the middle of the upper end of the filter tube 2. A dust scraper 6 is screwed to the end of the piston rod 5 that extends into the filter tube 2. A back-blowing assembly 7 is fixedly connected to the upper end of the piston rod 5. A "T"-shaped handle 8 is fixedly connected to the upper end of the back-blowing assembly 7.

[0031] A flange 11 for connecting the sampling tube 1 and the dust meter is fixedly installed at the upper end of the sampling tube 1, and a fine filter screen 12 is provided at the connection between the lower end of the sampling tube 1 and the filter tube 2.

[0032] The lower end of the filter tube 2 is provided with a rubber gasket 21 to increase the airtightness between the filter tube 2 and the coarse filter screen 4, and the dust scraper 6 slides in contact with the inner wall of the filter tube 2.

[0033] The backflush assembly 7 includes a vacuum pump 71 fixedly connected to the upper end of the piston rod 5. A one-way air inlet valve 72 is installed at the inlet of the vacuum pump 71, and a one-way air outlet valve 73 is installed at the outlet of the vacuum pump 71. A flexible air guide tube 74 is connected to the end of the one-way air outlet valve 73.

[0034] The backflush assembly 7 also includes a transition ring 75 disposed on the outside of the sampling tube 1. The transition ring 75 has a hollow structure and forms a transition air chamber. An "L"-shaped nozzle 76 is uniformly installed on the inner wall of the transition air chamber along its circumferential direction. The lower end of the "L"-shaped nozzle 76 extends close to the inner wall of the sampling tube 1. The end of the flexible air guide tube 74 away from the one-way air outlet valve 73 is connected to the inside of the transition air chamber.

[0035] An arc-shaped plate 9 is symmetrically installed on the upper end face of the filter tube 2 and on both sides of the piston rod 5. A limiting groove 10 is opened in the middle of the arc-shaped plate 9. A one-way air inlet valve 72 and a one-way air outlet valve 73 are respectively slidably installed in the limiting groove 10.

[0036] Working principle:

[0037] The sampling tube 1 is connected to the dust collector via the flange 11 at the upper end. The gas enters from the lower end of the filter tube 2 and first passes through the coarse filter 4 for preliminary filtration to remove larger particles of impurities. Then it passes through the fine filter 12 for further filtration, so that the dust content of the gas entering the sampling tube 1 and finally reaching the dust collector is lower, which meets the sampling requirements of the ultra-low dust collector.

[0038] When a lot of impurities accumulate on the lower surface of the fine filter screen 12, which may cause blockage, the staff pushes the "T"-shaped lever 8 to drive the piston rod 5 to slide back and forth inside the filter tube 2. The dust scraper 6 at the lower end of the piston rod 5 slides on the inner wall of the filter tube 2 at the same time, thereby scraping the impurities attached to the lower surface of the fine filter screen 12 and the inner wall of the filter tube 2 onto the upper surface of the coarse filter screen 4 to prevent the fine filter screen 12 from being blocked.

[0039] While pushing the "T"-shaped lever 8, the backflush assembly 7 starts working, the suction pump 71 starts, and the outside gas enters the suction pump 71 through the one-way inlet valve 72 and is discharged from the one-way outlet valve 73. It then enters the transition air chamber inside the transition ring 75 through the flexible air guide tube 74. The gas in the transition air chamber is sprayed out through the evenly installed "L"-shaped nozzles 76. The sprayed gas backflushes the inner wall of the sampling tube 1 and the fine filter screen 12, blowing off the dust that may be attached to the inner wall of the sampling tube 1 and the fine filter screen 12, preventing the fine filter screen 12 from clogging and ensuring the smooth progress of the sampling process. At the same time, the backflush airflow can blow the dust inside the filter tube 2 toward the coarse filter screen 4, so that the dust can be collected on the upper surface of the coarse filter screen 4.

[0040] After the backflushing process is completed, first unscrew bolt 3 manually, then remove the coarse filter screen 4 for cleaning, and then reinstall it.

[0041] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A sampling head anti-clogging device for an extractable ultra-low dust meter, comprising a sampling tube (1), characterized in that: The sampling tube (1) is connected to a filter tube (2) at its lower end. A coarse filter screen (4) is fixedly connected to the lower end of the filter tube (2) by a bolt (3). A piston rod (5) is slidably installed in the middle of the upper end of the filter tube (2). A dust scraper (6) is screwed to the end of the piston rod (5) that extends into the filter tube (2). A back-blowing assembly (7) is fixedly connected to the upper end of the piston rod (5). A "T"-shaped handle (8) is fixedly connected to the upper end of the back-blowing assembly (7).

2. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 1, characterized in that: The upper end of the sampling tube (1) is fixedly equipped with a flange (11) for connecting the sampling tube (1) and the dust meter.

3. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 1, characterized in that: A fine filter screen (12) is provided at the lower end of the sampling tube (1) and the connection point of the filter tube (2).

4. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 3, characterized in that: The lower end of the filter tube (2) is provided with a rubber gasket (21) to increase the airtightness between the filter tube (2) and the coarse filter screen (4).

5. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 1, characterized in that: The dust scraper (6) and the inner wall of the filter tube (2) are in sliding fit.

6. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 1, characterized in that: The backflush assembly (7) includes a vacuum pump (71) fixedly connected to the upper end of the piston rod (5). A one-way air inlet valve (72) is installed at the inlet of the vacuum pump (71), and a one-way air outlet valve (73) is installed at the outlet of the vacuum pump (71). A flexible air guide tube (74) is connected to the end of the one-way air outlet valve (73).

7. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 6, characterized in that: The backflush assembly (7) also includes a transition ring (75) disposed on the outside of the sampling tube (1). The transition ring (75) has a hollow structure and forms a transition air chamber. "L"-shaped nozzles (76) are uniformly installed on the inner wall of the transition air chamber along its circumferential direction. The lower end of the "L"-shaped nozzles (76) extends close to the inner wall of the sampling tube (1). The end of the flexible air guide tube (74) away from the one-way air outlet valve (73) is connected to the inside of the transition air chamber.

8. The anti-clogging device for the sampling head of an extractable ultra-low dust meter as described in claim 6, characterized in that: An arc-shaped plate (9) is symmetrically installed on the upper end face of the filter tube (2) and on both sides of the piston rod (5). A limiting groove (10) is opened in the middle of the arc-shaped plate (9). A one-way air inlet valve (72) and a one-way air outlet valve (73) are respectively slidably installed in the limiting groove (10).

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