Sampling head for high-efficiency filter leak detection device

Abstract

The utility model discloses a sampling head for a leak detection device of a high efficiency filter, which comprises a trumpet-shaped sampling head body, the top of the sampling head body is provided with a plurality of sampling pipes communicated with a guide plate, and the top and the bottom of each sampling pipe are provided with a gas solenoid valve for controlling the opening and closing of a gas channel. One-time detection within the range of the bottom surface of the filter is realized, mobile detection of the sampling tube is not needed, the detection precision and the detection efficiency are improved, and the leak detection position is positioned accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of filter leakage detection, in particular to a sampling head for a high-efficiency filter leakage detection device. Background Art

[0002] HEPA filter leak detection refers to on-site leak detection of HEPA filters and their systems after installation. It primarily checks for small pinholes in the filter media and other damage, such as leaks in the frame seal, gasket seal, and filter structure. The purpose of leak detection is to promptly identify defects in the HEPA filter itself and its installation by checking the tightness of the HEPA filter and its connection to the installation frame, so that appropriate remedial measures can be taken to ensure the cleanliness of the area.

[0003] At present, a handheld leak detection device is often used in the existing leak detection process. During the detection process, the hand holds the connecting rod of the sampling head and moves the bottom of the filter in an S shape. Since the sampling head is small, the S shape movement needs to be performed manually. At the same time, the span of the S shape movement is large, and the leakage points in some positions are not detected, so the final leak detection data is inaccurate, which reduces work efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a sampling head for a high-efficiency filter leak detection device. The sampling head is installed in the leak detection device to realize all-round leak detection of the filter without manual S-shaped movement, thereby improving the leak detection efficiency and solving the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] A sampling head for a high-efficiency filter leak detection device includes a trumpet-shaped sampling head body. The top of the sampling head body is provided with multiple sampling tubes connected to a guide plate. The top and bottom of the sampling tubes are provided with gas solenoid valves for controlling the opening and closing of the airway.

[0007] In this utility model, a sampling tube is installed on the top of the sampling head body, which fills the sampling head plane. Multiple sampling tubes fully contact the bottom surface of the filter, thereby connecting the sampling head body to the retractable hose of the leak detection device for detection. When a leak occurs, the gas solenoid valve opens the sampling tube passage at its lower end, and the leaked gas enters the leak detection device for detection through the guide plate and retractable hose. This achieves a one-time detection within the filter bottom surface, eliminating the need for mobile sampling tube detection, improving detection accuracy and efficiency, and accurately detecting leaks.

[0008] Preferably, a plurality of grooves are provided around the top of the sampling head body, and magnet blocks are provided in the grooves.

[0009] Preferably, the surface of the magnet block is higher than the surface of the sampling head body, and the surface of the sampling tube is lower than the surface of the magnet block.

[0010] Preferably, a connecting pipe is provided at the bottom of the guide plate, and the connecting pipe is connected to the telescopic hose.

[0011] Preferably, a threaded tube is provided at the bottom end of the sampling head body, and the threaded tube is detachably connected to the retractable hose by thread.

[0012] Preferably, the bottom end of the connecting tube is located inside the top end of the telescopic hose.

[0013] Preferably, the outer diameter of the connecting pipe is adapted to the inner diameter of the top end of the telescopic hose.

[0014] The utility model has the beneficial effects:

[0015] The utility model connects the sampling head body with the retractable hose of the leak detection device. The sampling head body moves upward under the action of the support rod, so that the ferromagnetic block provided on the top of the sampling head body is magnetically attracted to the metal frame of the filter, and the leaking gas causes the gas solenoid valve to open the sampling tube passage at its lower end. The leaked gas will enter the leak detection device for detection through the guide plate and the retractable hose, thereby realizing a one-time detection within the bottom surface of the filter. There is no need to carry out mobile detection of the sampling tube, thereby improving detection accuracy and efficiency, and accurately positioning the leak detection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0018] Figure numerals: 1 - sampling head body, 10 - groove, 11 - magnet block, 2 - threaded tube, 3 - sampling tube, 4 - guide plate, 5 - connecting tube, 6 - retractable hose, 7 - gas solenoid valve. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0022] Example 1

[0023] Embodiment 1 of the present utility model is a sampling head for a high-efficiency filter leak detection device, comprising a trumpet-shaped sampling head body 1, a plurality of sampling tubes 3 connected to a guide plate 4 are provided on the top of the sampling head body 1, and a gas solenoid valve 7 for controlling the opening and closing of the airway is provided on the top and bottom of the sampling tube 3.

[0024] Reference Figure 1 and Figure 2 In the present invention, a sampling tube 3 is installed on top of the sampling head body 1, filling the entire surface of the sampling head. Multiple sampling tubes 3 fully contact the bottom surface of the filter, thereby connecting the sampling head body 1 to the retractable hose 6 of the leak detection device for detection. When a leak occurs, the gas solenoid valve 7 opens the passageway of the sampling tube 3 at its lower end, allowing the leaked gas to enter the leak detection device through the guide plate 4 and retractable hose 6 for detection. This allows for a one-time detection within the filter bottom, eliminating the need for mobile testing of the sampling tube 3. This improves detection accuracy and efficiency, allowing for precise leak detection.

[0025] The gas solenoid valve 7 is a prior art and will not be described in detail here.

[0026] In some preferred embodiments, a plurality of grooves 10 are provided around the top of the sampling head body 1, and magnet blocks 11 are provided in the grooves 10. The purpose of providing the magnet blocks 11 is to connect the top surface of the sampling head body 1 to the metal filter housing through the magnetic effect of the magnet blocks 11, thereby fixing the sampling head body 1 below the filter. At the same time, the lower end of the sampling head body 1 is connected to a support rod (not shown in the figure). After the leak detection is completed, the sampling head body 1 and the filter can be separated by simply applying a downward force to the support rod.

[0027] It should be noted that the magnetic force of the magnet block 11 can achieve temporary connection and separation between the sampling head body 1 and the filter within a certain range, so the specific specifications of the magnet block 11 are not described here, and it is sufficient to meet the requirements.

[0028] In some preferred embodiments, the surface of the magnet block 11 is higher than the surface of the sampling head body 1, and the surface of the sampling tube 3 is lower than the surface of the magnet block 11. The height variation of the surface of the sampling head body 1 is, from smallest to largest, the surface of the sampling head body 1, the surface of the sampling tube 3, and the surface of the magnet block 11. The magnet block 11 has the highest surface height primarily to exert its magnetic effect on the filter for adsorption and separation, eliminating the need for manual scanning with a support rod to detect leaks, saving time and effort.

[0029] In some preferred embodiments, a connecting pipe 5 is provided at the bottom of the guide plate 4, which is connected to a retractable hose 6. The sampled leaked gas opens a gas solenoid valve 7, and the leaked gas passes through the guide plate 4 and the retractable hose 6 into the leak detection device for detection, thereby achieving precise positioning of the leak detection position.

[0030] In some preferred embodiments, the bottom end of the sampling head body 1 is provided with a threaded tube 2, which is threadably connected to the retractable hose 6. The threaded tube 2 is provided primarily for assembly of the retractable hose 6 within the threaded tube 2. By connecting the two, the sampling head body 1 can be replaced, allowing the sampling head body 1 to be compatible with the bottom surfaces of various filter sizes for leak detection. The top end of the retractable hose 6 is provided with external threads, while the threaded tube 2 is internally threaded, making the two convenient for assembly and disassembly.

[0031] In some preferred embodiments, the bottom end of the connecting tube 5 is located inside the top end of the telescopic hose 6. The outer diameter of the connecting tube 5 is adapted to the inner diameter of the top end of the telescopic hose 6.

[0032] Specifically, the bottom end of the connecting pipe 5 is embedded in the telescopic hose 6, and the collected leaked gas can be transferred to the leak detection device through the telescopic hose 6 to display the leak detection position.

[0033] The working principle of the utility model is that, when in use, the sampling head body 1 is connected to the retractable hose 6 of the leak detection device, and the sampling head body 1 is moved upward under the action of the support rod, so that the ferromagnetic block provided on the top of the sampling head body 1 is magnetically adsorbed to the metal frame of the filter, and the leaked gas causes the gas solenoid valve 7 to open the sampling tube 3 at its lower end, and the leaked gas will enter the leak detection device for detection through the guide plate 4 and the retractable hose 6, thereby realizing a one-time detection within the bottom surface of the filter, without the need for mobile detection of the sampling tube 3, thereby improving the detection accuracy and efficiency, and accurately positioning the leak detection position.

[0034] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sampling head for a high efficiency filter leak detection device, characterized in that: The sampling head comprises a trumpet-shaped sampling head body (1), wherein a plurality of sampling tubes (3) are provided on the top of the sampling head body (1) and are communicated with a guide plate (4), and gas solenoid valves (7) for controlling the opening and closing of the airway are provided on the top and bottom of the sampling tubes (3).

2. The sampling head for a high efficiency filter leak detection device according to claim 1, characterized in that: A plurality of grooves (10) are provided around the top of the sampling head body (1), and magnet blocks (11) are provided in the grooves (10).

3. The sampling head for a high efficiency filter leak detection device according to claim 2, characterized in that: The surface of the magnet block (11) is higher than the surface of the sampling head body (1), and the surface of the sampling tube (3) is lower than the surface of the magnet block (11).

4. The sampling head for a high efficiency filter leak detection device according to claim 2, characterized in that: A connecting pipe (5) is provided at the bottom of the guide plate (4), and the connecting pipe (5) is in communication with a retractable hose (6).

5. The sampling head for a high efficiency filter leak detection device according to claim 4, characterized in that: A threaded tube (2) is provided at the bottom end of the sampling head body (1), and the threaded tube (2) is detachably connected to the retractable hose (6) via a thread.

6. The sampling head for a high efficiency filter leak detection device according to claim 5, characterized in that: The bottom end of the connecting pipe (5) is located inside the top end of the telescopic hose (6).

7. The sampling head for a high efficiency filter leak detection device according to claim 5, characterized in that: The outer diameter of the connecting pipe (5) is adapted to the inner diameter of the top end of the telescopic hose (6).

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