Leak detector with regulating function

Abstract

The utility model relates to leak detector technical field discloses a leak detector with adjusting function, including leak detector body and adjusting mechanism, the adjusting mechanism includes fixed box, the fixed box rear end fixedly arranged with connecting pipe, the connecting pipe inner end screw thread is provided with filter element, the filter element inner end fixedly arranged with spiral filter plate, the fixed box inner end rear side rotationally arranged with the rotation column, the rotation column outside lower end fixedly covers and sets up the limit board, the fixed ring inner end is provided with the spring, the spring upper end fixedly arranged with the movable ring, the movable ring front end fixedly arranged with the clamping plate, the fixed box upper end fixedly arranged with the fixed plate in the position of rear end, the utility model can realize the switching from single channel to double channel in the fixed box after lifting movable ring, and the speed of air through the fixed box is improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of leak detector technology, and in particular to a leak detector with an adjustment function. Background Technology

[0002] Helium is an inert gas, belonging to the rare gas family. It is colorless, odorless, and non-toxic at room temperature and pressure, and its density is less than air, making it extremely difficult to react chemically with other substances. Leak detectors are used to detect minute leaks in systems, determining whether a component, assembly, or system has an internal gas leak, as well as the size and location of the leak. They are commonly used in vacuum systems, semiconductor manufacturing, vacuum coating, food packaging, and gas-tight containers. A mass spectrometry leak detector is an instrument that combines mass spectrometry analysis and leak testing. It detects and quantifies the size and type of leak by analyzing the gas molecules that enter the test chamber through a leak. After the gas from the leak or the area to be tested enters the chamber, it is sent to a mass spectrometer (such as an ionization source, mass spectrometer, or detector). The mass spectrometer separates and detects ions with different mass-to-charge ratios, obtaining a gas spectrum. Specific mass peaks correspond to specific gas molecules.

[0003] In the process of realizing this application, the inventors discovered the following problems with the prior art: the existing leak detectors generally have a fixed air intake speed and cannot change the air intake speed. Because the air intake speed is fixed, it cannot be adaptively adjusted according to the leakage intensity of the tested object, which may result in the failure to detect extremely small leaks or the oversensitivity to large leaks, generating an overload signal.

[0004] Therefore, those skilled in the art have provided a leak detector with an adjustable function to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a leak detector with an adjustable function. After lifting the movable ring, the operator can rotate the rotating column and align the card plate with the middle slot to switch from a single channel to a dual channel within the fixed box, significantly increasing the speed at which air passes through the fixed box.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A leak detector with an adjustable function includes a leak detector body and an adjustment mechanism. The leak detector body has handle grooves on both sides near the lower end, and an air inlet pipe is fixedly installed at the middle position of the upper end of the rear side of the leak detector body. The adjustment mechanism includes a fixed box, a connecting pipe fixedly installed at the rear end of the fixed box, a filter cylinder threadedly installed at the inner end of the connecting pipe, a spiral filter plate fixedly installed at the inner end of the filter cylinder, a rotating column rotatably installed at the rear side of the inner end of the fixed box, a limiting plate fixedly sleeved at the lower outer end of the rotating column, a fixed ring fixedly installed at the rear end of the upper side of the fixed box, a spring installed at the inner end of the fixed ring, a movable ring fixedly installed at the upper end of the spring, a retaining plate fixedly installed at the front end of the movable ring, and a fixed plate fixedly installed at the middle position of the upper end of the fixed box.

[0007] Furthermore, the fixing box is fixedly sleeved on the outside of the air intake pipe, and the spiral filter plate is set at the front end of the air intake pipe.

[0008] Furthermore, the rotating column passes through the fixed box and extends to the top of the fixed box, and the movable ring is located at the upper end of the fixed box.

[0009] Furthermore, the limiting plate is rotatably disposed inside the fixed box near the rear end, and the movable ring is movably disposed on the upper end of the fixed ring.

[0010] Furthermore, the upper end of the fixing plate is provided with three slots, and the card is movably disposed inside the slots of the fixing plate.

[0011] Furthermore, the upper two ends of the outer side of the rotating column are provided with sliding grooves, and the inner ends of the fixing ring are fixedly provided with sliders on both sides.

[0012] This utility model has the following beneficial effects: 1. The leak detector with adjustable function proposed in this utility model uses a spiral filter plate in the filter cylinder at the front end of the fixed box to perform preliminary filtration of external gas, preventing dust from entering the leak detector body and improving the long-term stability and measurement accuracy of the equipment; when it is necessary to adjust the speed of air entering the leak detector body, the operator can lift the movable ring, rotate the rotating column and align the card plate with the middle card slot. By using the limiting effect of the card plate and the card slot, the path and speed of air flowing through the fixed box can be changed, realizing the switching from single channel to dual channel, and significantly improving the speed of air passing through the fixed box. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall rear axle of this utility model; Figure 2 This is a schematic diagram of the overall front axle of this utility model; Figure 3 This is an isometric schematic diagram of the leak detector body, handle groove, and air inlet pipe of this utility model; Figure 4 This is an isometric schematic diagram of the adjustment mechanism of this utility model; Figure 5This is a cross-sectional schematic diagram of the fixing box, connecting pipe, filter cylinder and limiting plate of this utility model; Figure 6 This is a cross-sectional schematic diagram of the fixing box, connecting pipe, spiral filter plate and rotating column of this utility model; Figure 7 This is an isometric schematic diagram of the limiting plate, movable ring, and clamping plate of this utility model; Figure 8 This utility model Figure 7 A partial schematic diagram of point A; Figure 9 This utility model Figure 6 A partial schematic diagram of point B.

[0014] Legend: 1. Leak detector body; 2. Handle groove; 3. Adjustment mechanism; 4. Air inlet pipe; 301. Fixing box; 302. Connecting pipe; 303. Filter cartridge; 304. Spiral filter plate; 305. Rotating column; 306. Limiting plate; 307. Fixing ring; 308. Spring; 309. Moving ring; 310. Clamping plate; 311. Fixing plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-3 One embodiment provided by this utility model: A leak detector with adjustable function includes a leak detector body 1 and an adjustment mechanism 3. The lower ends of both sides of the leak detector body 1 are provided with handle grooves 2, and an air inlet pipe 4 is fixedly provided at the middle position of the upper end of the rear side of the leak detector body 1.

[0017] Specifically, the innovation of this device lies in the adjustment mechanism 3 at the rear of the leak detector body 1. The main structure of the leak detector body 1 remains unchanged and is based on existing technology. Specifically, a vacuum system consisting of a mechanical pump and a molecular pump evacuates the interior of the mass spectrometer chamber to a high vacuum, creating the necessary environment for detection. Subsequently, an electron beam emitted by the ion source ionizes the gas molecules introduced from the test port, forming charged ions. These ions are deflected in the analyzer by a magnetic field. The magnetic field filters the ions based on the mass-to-charge ratio, allowing helium ions of a specific mass to pass precisely through the slit of the preset path, while ions of other mass numbers are effectively filtered out. The helium ions that finally pass through are captured by the detector, generating a weak ion flow signal. This signal is amplified millions of times by a dedicated amplifier and then converted into an intuitive leak rate value by the signal processing system and displayed.

[0018] Reference Figures 4-9 The adjusting mechanism 3 includes a fixed box 301. A connecting pipe 302 is fixedly installed at the rear end of the fixed box 301. A filter cylinder 303 is threadedly installed at the inner end of the connecting pipe 302. A spiral filter plate 304 is fixedly installed at the inner end of the filter cylinder 303. A rotating column 305 is rotatably installed at the rear side of the inner end of the fixed box 301. A limiting plate 306 is fixedly sleeved at the lower outer end of the rotating column 305. A fixing ring 307 is fixedly installed at the rear end of the upper side of the fixed box 301. A spring 308 is installed at the inner end of the fixing ring 307. A movable ring 309 is fixedly installed at the upper end of the spring 308. A retaining plate 310 is fixedly installed at the front end of the movable ring 309. The middle part of the upper side of the fixed box 301... A fixed plate 311 is fixedly installed in a position. A fixed box 301 is fixedly sleeved on the outside of the air intake pipe 4. A spiral filter plate 304 is installed at the front end of the air intake pipe 4. A rotating column 305 passes through the fixed box 301 and extends to the top of the fixed box 301. A movable ring 309 is installed at the upper end of the fixed box 301. A limiting plate 306 is rotatably installed on the inner side of the fixed box 301 near the rear end. The movable ring 309 is movably installed on the upper end of the fixed ring 307. Three slots are opened at the upper end of the fixed plate 311. A locking plate 310 is movably installed in the slots of the fixed plate 311. Sliding grooves are opened at both ends of the upper outer side of the rotating column 305. Sliding blocks are fixedly installed on both sides of the inner end of the fixed ring 307.

[0019] Specifically, after the vacuum system is started, the air inlet pipe 4 introduces external gas into the fixed box 301. The filter cylinder 303 at the front end of the fixed box 301 is equipped with a spiral filter plate 304 to filter external gas and prevent dust from entering the leak detector body 1. When it is necessary to adjust the speed at which air enters the leak detector body 1, the operator can lift the movable ring 309 upwards, rotate the rotating column 305, and then align the locking plate 310 with the locking groove in the middle of the fixed plate 311. Subsequently, the spring 308 will drive the movable ring 309 to return to its original position, and the locking plate 310 will be limited by the locking groove of the fixed plate 311, thereby changing the position of the limiting plate 306 in the fixed box 301, so that the air entering the fixed box 301 changes from a single channel to a dual channel, thereby accelerating the speed at which air passes through the fixed box 301. It should be noted that the three slots of the fixing plate 311 correspond to two different states. Changing the position of the plate 310 in the slot can change the speed at which air enters the leak detector body 1. Since the filter cylinder 303 and the connecting pipe 302 are connected by threads, the filter system can be quickly replaced after the filter cylinder 303 is unscrewed to avoid excessive dust accumulation on the spiral filter plate 304 due to long-term use.

[0020] Working principle: After the vacuum system is started, the air inlet pipe 4 introduces external gas into the fixed box 301. The filter cylinder 303 at the front end of the fixed box 301 is equipped with a spiral filter plate 304 to filter external gas and prevent dust from entering the leak detector body 1. When it is necessary to adjust the speed at which air enters the leak detector body 1, the operator can lift the movable ring 309 upward, rotate the rotating column 305, and then align the locking plate 310 with the locking groove in the middle of the fixed plate 311. Subsequently, the spring 308 will drive the movable ring 309 to return to its original position, and the locking plate 310 will be limited by the locking groove of the fixed plate 311, thereby changing the position of the limiting plate 306 in the fixed box 301, thus accelerating the speed at which air passes through the fixed box 301.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak detector with an adjustable function, comprising a leak detector body (1) and an adjusting mechanism (3), characterized in that: The leak detector body (1) has handle grooves (2) on both sides near the lower end, and an air inlet pipe (4) is fixedly installed at the middle position of the upper end of the rear side of the leak detector body (1). The adjustment mechanism (3) includes a fixed box (301), a connecting pipe (302) is fixedly provided at the rear end of the fixed box (301), a filter cylinder (303) is threadedly provided at the inner end of the connecting pipe (302), a spiral filter plate (304) is fixedly provided at the inner end of the filter cylinder (303), a rotating column (305) is rotatably provided at the rear side of the inner end of the fixed box (301), a limiting plate (306) is fixedly sleeved at the lower outer end of the rotating column (305), a fixing ring (307) is fixedly provided at the rear end of the upper side of the fixed box (301), a spring (308) is provided at the inner end of the fixing ring (307), a movable ring (309) is fixedly provided at the upper end of the spring (308), a retaining plate (310) is fixedly provided at the front end of the movable ring (309), and a fixing plate (311) is fixedly provided at the middle position of the upper end of the fixed box (301).

2. A leak detector with adjustable function according to claim 1, characterized in that: The fixing box (301) is fixedly sleeved on the outside of the air inlet pipe (4), and the spiral filter plate (304) is set at the front end of the air inlet pipe (4).

3. A leak detector with adjustable function according to claim 1, characterized in that: The rotating column (305) passes through the fixed box (301) and extends to the top of the fixed box (301), and the movable ring (309) is located at the upper end of the fixed box (301).

4. A leak detector with adjustable function according to claim 1, characterized in that: The limiting plate (306) is rotatably disposed on the inner side of the fixed box (301) near the rear end, and the movable ring (309) is movably disposed on the upper end of the fixed ring (307).

5. A leak detector with an adjustable function according to claim 1, characterized in that: The upper end of the fixing plate (311) is provided with three slots, and the card plate (310) is movably disposed inside the slots of the fixing plate (311).

6. A leak detector with an adjustable function according to claim 1, characterized in that: The upper two ends of the outer side of the rotating column (305) are provided with sliding grooves, and the inner ends of the fixing ring (307) are fixed with sliders on both sides.

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