Sample cup filter apparatus for a particle counter

Abstract

The utility model discloses a sampling cup filter device for particle counter, including sampling cup body and the sealing cup cover of screw connection at its end part, the sealing cup cover is fixedly installed with micro -filter, the top of sealing cup cover is detachably connected with end seal through bolt, the inside of end seal is opened to the shunt cavity, the inside sliding installation of shunt cavity has the shunt nozzle. The utility model, through controllable electromagnetic ring and the magnetic attraction cooperation of magnetic force ring realizes the lift control of shunt nozzle, and automatic switching bottom flow channel one self -checking mode and lateral flow channel two detection mode, the airflow penetrates micro -filter under self -checking mode and realizes clean, thereby verifying the cleanliness in sampling cup, so as to improve the detection accuracy of subsequent particle counter for airflow, avoid the existence of adhering influence detection judgment in sampling cup, and the airflow is directly introduced into detection port through lateral flow channel under detection mode, and the data reliability is ensured, and the detection efficiency is improved by the quick switching of both.

Description

Technical Field

[0001] This utility model relates to the field of particle counter sampling technology, and more specifically, to a sampling cup filter device for particle counters. Background Technology

[0002] In traditional particle counter sampling cup designs, conventional sampling cups lack effective self-cleaning functions. After long-term use, particulate contaminants easily adhere to the inner wall of the cup, directly affecting the accuracy of subsequent test results. Secondly, most existing technologies adopt a single airflow channel design, which cannot achieve rapid switching between detection and self-testing modes, resulting in cumbersome operation procedures and low detection efficiency. Furthermore, the traditional airflow guiding structure design is simple, and turbulence and uneven particle distribution are easily generated when airflow passes through, which seriously affects the detection accuracy.

[0003] Existing technologies typically address this by manually disassembling and cleaning or adding independent cleaning devices. However, this not only increases maintenance costs but also introduces the risk of secondary contamination due to human operation. This is especially true in high-precision detection scenarios, such as semiconductor cleanrooms or pharmaceutical production environments, where traditional designs struggle to meet increasingly stringent aerosol particle detection requirements. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a sampling cup filter device for a particle counter to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] A sampling cup filter device for a particle counter includes a sampling cup body and a sealing cup cover threaded to its end. A microfilter is fixedly installed on the sealing cup cover. An end seal is detachably connected to the top of the sealing cup cover by bolts. A flow divider cavity is formed inside the end seal. A flow divider nozzle is slidably installed inside the flow divider cavity. The tip of the flow divider nozzle penetrates and extends to the top of the end seal. The flow divider cavity is located at the top of the microfilter. A uniformly distributed detection airflow port is formed on the top of the sealing cup cover. A uniformly distributed airflow cavity is formed on the inner wall of the flow divider cavity. The interior of the airflow cavity is connected to the interior of the detection airflow port.

[0007] The top of the flow divider has an external airflow port that communicates with its interior. The bottom of the flow divider has a uniformly distributed flow channel one, which is blocked by the inner wall of the flow divider cavity. The side of the flow divider has a uniformly distributed flow channel two, which is correspondingly arranged with and communicates with the airflow cavity. A controllable electromagnetic ring is fixedly installed on the inner wall of the flow divider cavity. A magnetic ring is installed on the outer side of the flow divider, which is located at the bottom of the controllable electromagnetic ring and is magnetically connected to the controllable electromagnetic ring.

[0008] As a further description of the above technical solution: a large-mesh filter screen is connected to the inner wall of the external airflow port, and the large-mesh filter screen is used to block larger impurities and objects from entering.

[0009] As a further description of the above technical solution: a uniformly distributed sealing plug is installed on the inner bottom wall of the flow divider cavity, and the sealing plug is located inside the flow channel one.

[0010] As a further description of the above technical solution: the top of the sampling cup body is provided with a fitting groove, the inside of the fitting groove is connected with a sealing ring, and the bottom of the edge of the sealing cup lid is located inside the fitting groove and fits against the sealing ring.

[0011] As a further description of the above technical solution: a limiting tube is connected to the inner wall of the airflow cavity, and the bottom end of the limiting tube is located inside the detection airflow port.

[0012] As a further description of the above technical solution: the cross-section of the airflow cavity near the diverter nozzle is conical, and a spiral guide shaft is installed on the inner wall of the airflow cavity.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] This invention achieves lifting and lowering control of the diverter nozzle through the magnetic attraction of a controllable electromagnetic ring and a magnetic ring, automatically switching between a bottom flow channel self-test mode and a side flow channel detection mode. In self-test mode, the airflow penetrates the micro-filter to achieve cleanliness, thereby verifying the cleanliness of the sampling cup, which improves the detection accuracy of the subsequent particle counter and avoids the influence of adhesions in the sampling cup on the detection judgment. In detection mode, the airflow is directly introduced into the detection port through the side flow channel to ensure data reliability. The rapid switching between the two modes improves detection efficiency.

[0015] Simultaneously, through fluid dynamics optimization, the airflow is forced into the conical airflow cavity and combined with the spiral guide shaft 9 to form a forced vortex, which makes the particles evenly distributed. The limiting tube constrains the airflow to reduce turbulence error and improve detection accuracy. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a front view cross-sectional structural diagram of the present invention;

[0018] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the diverter nozzle of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Sampling cup body; 101. Fitting groove; 2. Sealing cup lid; 201. Detection airflow port; 3. Micro filter; 4. End seal; 401. Diverting chamber; 402. Diverting nozzle; 4021. External airflow port; 4022. Flow channel one; 4023. Flow channel two; 4024. Magnetic ring; 403. Airflow chamber; 404. Controllable electromagnetic ring; 5. Large mesh filter screen; 6. Sealing plug; 7. Sealing ring; 8. Limiting tube; 9. Spiral guide shaft. Detailed Implementation

[0022] 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.

[0023] To improve the detection accuracy and efficiency of the particle counter for airflow, this solution provides Example 1:

[0024] Please see Figure 1-4 In this utility model, a sampling cup filter device for a particle counter includes a sampling cup body 1 and a sealing cup cover 2 threadedly connected to its end. A micro filter 3 is fixedly installed on the sealing cup cover 2. An end seal 4 is detachably connected to the top of the sealing cup cover 2 by bolts. A diversion cavity 401 is opened inside the end seal 401. A diversion nozzle 402 is slidably installed inside the diversion cavity 401. The top end of the diversion nozzle 402 penetrates and extends to the top of the end seal 4. The diversion cavity 401 is located in... The top of the micro filter 3 and the top of the sealing cup cover 2 are provided with uniformly distributed detection airflow ports 201. The inner wall of the diversion cavity 401 is provided with uniformly distributed airflow cavities 403. The interior of the airflow cavities 403 is connected to the interior of the detection airflow ports 201. The inner bottom wall of the diversion cavity 401 is provided with uniformly distributed sealing plugs 6. The sealing plugs 6 are located inside the flow channel 4022. The inner wall of the airflow cavities 403 is connected with a limiting tube 8. The bottom end of the limiting tube 8 is located inside the detection airflow ports 201.

[0025] The top of the diverter nozzle 402 has an external airflow port 4021 that communicates with its interior. A large-mesh filter screen 5 is connected to the inner wall of the external airflow port 4021. The large-mesh filter screen 5 is used to block larger impurities and objects from entering the device. The bottom of the diverter nozzle 402 has a uniformly distributed flow channel 1 4022. The flow channel 1 4022 is blocked by the inner wall of the diverter cavity 401. The side of the diverter nozzle 402 has a uniformly distributed flow channel 2 4023. The flow channel 2 4023 is correspondingly arranged with the airflow cavity 403 and communicates with it. A controllable electromagnetic ring 404 is fixedly installed on the inner wall of the diverter cavity 401. A magnetic ring 4024 is installed on the outer side of the diverter nozzle 402. The magnetic ring 4024 is located at the bottom of the controllable electromagnetic ring 404 and is magnetically connected to the controllable electromagnetic ring 404.

[0026] In this invention, when it is necessary to detect the cleanliness of the sampling cup, the controller energizes the controllable electromagnetic ring 404 to generate a magnetic field that attracts the magnetic ring 4024, causing the diverter nozzle 402 to slide upward. At this time, the flow channel 4022 at the bottom of the diverter nozzle 402 is disengaged from the sealing plug 6 and exposed in the diverter cavity 401, while the flow channel 4023 on the side is blocked by the inner wall of the diverter cavity 401.

[0027] External airflow enters through external airflow port 4021 and is initially filtered by large-mesh filter 5 to prevent large-diameter impurities from entering and causing blockage. Then, the airflow flows downward through flow channel 4022, penetrates micro filter 3 and enters the interior of sampling cup 1. The airflow is then purified by secondary filtration by micro filter 3 before entering the interior of sampling cup 1, thereby determining whether the sampling cup is clean.

[0028] After completing the self-test, the controller reverses the current of the controllable electromagnetic ring 404, the magnetic ring 4024 moves downward due to the repulsive force, the first flow channel 4022 is sealed by the sealing plug 6, the second flow channel 4023 is aligned with the airflow cavity 403, at this time the external airflow enters the airflow cavity 403 laterally through the second flow channel 4023, and under the guidance of the limiting tube 8, it passes through the detection airflow port 201 and directly reaches the particle counter, realizing high-precision detection of the gas to be tested;

[0029] In the above structure, both the end seal 4 and the sealing cup cover 2 can be removed, thereby allowing for cleaning and maintenance of the equipment's interior.

[0030] Please see Figure 2 The sampling cup body 1 has a fitting groove 101 at the top, and a sealing ring 7 is connected inside the fitting groove 101. The bottom edge of the sealing cup lid 2 is located inside the fitting groove 101 and fits against the sealing ring 7.

[0031] In this invention, when connecting the sealing cup lid 2, the deformation of the fitting groove 101 and the sealing ring 7 can further improve the sealing performance between the sealing cup lid 2 and the sampling cup body 1, thereby preventing gas from flowing from the connection position and affecting the detection accuracy.

[0032] Based on the above Embodiment 1, in order to improve the accuracy of gas detection by the particle counter, this solution provides Embodiment 2:

[0033] Please see Figure 2 and 3 The section of the airflow cavity 403 near the diverter nozzle 402 is tapered, and a spiral guide shaft 9 is installed on the inner wall of the airflow cavity 403.

[0034] In this invention, based on Embodiment 1, when the airflow enters the airflow cavity 403 with a conical cross-section through the flow channel 2 4023, the spiral guide shaft 9 forces the airflow to form a vortex, extending the path and uniformly mixing the particles in the gas. At the same time, the conical structure accelerates the airflow through the limiting tube 8 into the detection airflow port 201, avoiding turbulence interference with the detection signal. This design significantly improves the resolution and repeatability of the particle counter, and is especially suitable for stable sampling of nanoscale particles or low-concentration gases.

[0035] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A sampling cup filter device for a particle counter, comprising a sampling cup body (1) and a sealing cup cap (2) threaded to its end, characterized in that: A micro filter (3) is fixedly installed on the sealing cup cover (2). An end seal (4) is detachably connected to the top of the sealing cup cover (2) by bolts. A diversion cavity (401) is opened inside the end seal (4). A diversion nozzle (402) is slidably installed inside the diversion cavity (401). The top of the diversion nozzle (402) extends through and to the top of the end seal (4). The diversion cavity (401) is located on the top of the micro filter (3). A detection airflow port (201) is evenly distributed on the top of the sealing cup cover (2). An airflow cavity (403) is evenly distributed on the inner wall of the diversion cavity (401). The interior of the airflow cavity (403) is connected to the interior of the detection airflow port (201). The top of the diverter (402) is provided with an external airflow port (4021) that communicates with its interior. The bottom of the diverter (402) is provided with a uniformly distributed flow channel one (4022). The flow channel one (4022) is blocked by the inner wall of the diverter cavity (401). The side of the diverter (402) is provided with a uniformly distributed flow channel two (4023). The flow channel two (4023) is correspondingly arranged with the airflow cavity (403) and communicates with each other. A controllable electromagnetic ring (404) is fixedly installed on the inner wall of the diverter cavity (401). A magnetic ring (4024) is installed on the outer side of the diverter (402). The magnetic ring (4024) is located at the bottom of the controllable electromagnetic ring (404) and is magnetically connected to the controllable electromagnetic ring (404).

2. The sampling cup filter device for a particle counter according to claim 1, characterized in that: A large-mesh filter (5) is connected to the inner wall of the external airflow port (4021), and the large-mesh filter (5) is used to block impurities and objects from entering.

3. The sampling cup filter device for a particle counter according to claim 1, characterized in that: The inner bottom wall of the flow divider (401) is equipped with uniformly distributed sealing plugs (6), which are located inside the flow channel (4022).

4. The sampling cup filter device for a particle counter according to claim 1, characterized in that: The top of the sampling cup (1) is provided with a fitting groove (101), and a sealing ring (7) is connected inside the fitting groove (101). The bottom edge of the sealing cup lid (2) is located inside the fitting groove (101) and fits against the sealing ring (7).

5. The sampling cup filter device for a particle counter according to claim 1, characterized in that: A limiting tube (8) is connected to the inner wall of the airflow cavity (403), and the bottom end of the limiting tube (8) is located inside the detection airflow port (201).

6. The sampling cup filter device for a particle counter according to claim 1, characterized in that: The section of the airflow cavity (403) near the diverter nozzle (402) is tapered, and a spiral guide shaft (9) is installed on the inner wall of the airflow cavity (403).

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