Split quick-change helium detection mechanism

Abstract

The utility model relates to a split quick-change helium detection mechanism, which comprises a detection machine table and a helium detection part, and is characterized in that a vacuum box body is fixedly arranged on the detection machine table, a lower detection mold part is arranged on the periphery of the vacuum box body, and an upper detection mold part is arranged at the upper end of the lower detection mold part; a connecting plate is connected between the detection lower mold part and the detection upper mold part, a plurality of threaded holes are formed in the surface of the connecting plate, a fixing bolt is arranged in each threaded hole, limiting rods are arranged on the periphery of the detection upper mold part, mold closing rods matched with the limiting rods are arranged on the periphery of the detection lower mold part, and a plurality of injection pipes are arranged in the vacuum box body. The helium detection part is communicated with each injection pipe, a to-be-detected product is placed in the vacuum box body, the injection pipes are inserted into holes in the surface of the to-be-detected product, and the effect of convenient replacement and maintenance is achieved by arranging the detachable vacuum box body.

Description

Technical Field

[0001] The utility model relates to the technical field of helium detection, in particular to a split quick-change helium detection mechanism. Background Art

[0002] Helium leak detection is a measurement method that uses a leak detector to detect leaks based on changes in helium partial pressure within a vacuum. Unlike other detection methods that rely on volume, pressure, or vacuum levels, helium leak detection achieves overwhelmingly high sensitivity and accuracy, independent of operator skill.

[0003] When performing helium leak detection, a helium mass spectrometer leak detector is generally used. The helium mass spectrometer leak detector is an instrument with a vacuum chamber. The sheet metal to be tested is placed in the vacuum chamber, and the interior is evacuated and helium is introduced. Then, measurement sensors are placed at various positions of the product. The pressure of helium on different parts of the product under vacuum can be used to detect whether the surface airtightness of the sheet metal is qualified. It can quickly detect whether there are airtightness leaks in the parts of the sheet metal that need to be riveted, thereby ensuring the product quality of the sheet metal.

[0004] Existing helium mass spectrometer leak detectors use an integrated structure, and the vacuum box and helium filling part cannot be separated. When encountering larger detection parts, another helium mass spectrometer leak detector of other specifications needs to be replaced for detection. When there is a problem with the vacuum box, it cannot be replaced separately. Therefore, the existing helium detection mechanism is unable to flexibly deal with mechanical damage and replacement problems caused by the test process. Solving such problems is costly and inefficient. Utility Model Content

[0005] The purpose of the utility model is to realize the splitting and fixing of the vacuum box by arranging a helium detection mechanism that can be split, and to adapt to helium detection parts of different specifications.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a split quick-change helium detection mechanism, comprising a detection machine and a helium detection part, a vacuum box is fixedly arranged on the detection machine, the four sides of the vacuum box are arranged as a detection lower mold part, the upper end of the detection lower mold part is arranged with a detection upper mold part, a connecting plate is connected between the detection lower mold part and the detection upper mold part, a plurality of threaded holes are opened on the surface of the connecting plate, a fixing bolt is arranged in each of the threaded holes, a limiting rod is arranged around the detection upper mold part, a closing rod matching the limiting rod is arranged around the detection lower mold part, a plurality of injection pipes are arranged inside the vacuum box, the helium detection part is connected to each of the injection pipes, the product to be detected is placed in the vacuum box, and the injection pipe is inserted into the pores on the surface of the product to be detected.

[0007] Preferably, a placement slot is provided inside the vacuum box, a positioning slot is provided on one side of the placement slot, and a positioning opening for inserting a positioning pin is provided in the positioning slot.

[0008] Preferably, the top of the vacuum box is fixedly connected with a connecting port, and the detection upper mold part further includes a driving cylinder, and the output end of the driving cylinder is fixedly connected with a connecting piece that matches the connecting port.

[0009] Preferably, the helium detection unit includes a helium detection tube, and the helium detection unit also includes a vacuum air pump. One end of the helium detection tube is connected to the vacuum air pump, and the other end is connected to the bottom of the vacuum box.

[0010] Preferably, the helium detection unit further includes a recovery system provided on one side of the vacuum air pump, and the recovery system is communicated with the interior of the vacuum box.

[0011] Preferably, the helium detection unit further includes a helium pressure detection unit, the helium pressure detection unit includes a pressure bottle and a pressure hose connected to the pressure bottle, and the other end of the pressure hose is connected to a pressure gauge.

[0012] The beneficial effects of the utility model are:

[0013] 1. A detachable vacuum box is provided. The top of the vacuum box can be opened and closed by a cylinder and can be fixed and lifted. When the top connecting plate is removed, the interior of the vacuum box is exposed and can be repaired.

[0014] 2. By setting a positioning groove to limit the position of the sheet metal to be inspected, the positioning and limiting effects are achieved.

[0015] 3. By setting up an overall helium detection mechanism for helium detection, a one-stop workflow of vacuuming, filling and air pressure detection in the vacuum box is realized, thereby improving the efficiency of helium detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a split quick-change helium detection mechanism of the utility model Figure 1

[0017] Figure 2 This is a schematic structural diagram of the vacuum box portion of the utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 It is a structural diagram of part of the utility model.

[0020] In the picture:

[0021] 1. Testing machine; 11. Products to be tested;

[0022] 2. Helium detection unit;

[0023] 3. Vacuum box; 31. Detection of lower mold part; 311. Clamping rod; 32. Detection of upper mold part; 321. Limit rod; 322. Driving cylinder; 323. Connecting part; 33. Connecting plate; 331. Threaded hole; 332. Fixing bolt; 34. Injection pipe; 35. Placement trough; 351. Positioning groove; 352. Positioning port; 36. Connecting port. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] refer to Figure 1-4 A testing machine 1 is set up, and a box of a product 11 to be tested is placed on the testing machine 1 to prepare for testing. A helium detection part 2 is set on one side of the testing machine 1. The helium detection part 2 adopts a circulating ventilation and exhaust system, which can not only exhaust air to form a vacuum, but also flush helium for pressure testing, and can also retract and collect the helium after the test is completed, thereby achieving the effect of clean production.

[0026] refer to Figure 1-4A vacuum box 3 is fixedly provided on the inspection machine 1. The sheet metal parts to be processed can be placed inside the vacuum box 3. The four sides of the vacuum box 3 are provided with a detection lower mold part 31. The upper end of the detection lower mold part 31 is provided with a detection upper mold part 32. The detection lower mold part 31 and the detection upper mold part 32 are superimposed on each other. The detection upper mold part 32 can control the opening of the vacuum box 3. A connecting plate 33 is connected between the detection lower mold part 31 and the detection upper mold part 32. The surface of the connecting plate 33 is provided with several threaded holes 331. Each thread The holes 331 are each provided with fixing bolts 332, which can fix and separate the vacuum box body 3 and the detection upper mold part 32. Unscrewing the fixing bolts 332 can open the inside of the vacuum box body 3 to install the product and repair the inside of the vacuum box body 3. Limit rods 321 are provided around the detection upper mold part 32, and clamping rods 311 that match the limit rods 321 are provided around the detection lower mold part 31. The limit rods 321 will be inserted into the clamping rods 311 to realize the detection of the upper mold part 32 and The alignment effect between the lower mold parts 31 is detected and can be fixed. Several injection tubes 34 are set inside the vacuum box 3. The helium detection part 2 is connected to each injection tube 34. The product 11 to be detected is placed in the vacuum box 3. The injection tube 34 is inserted into the pores on the surface of the product 11 to be detected. Gas can be extracted and helium can be injected through the injection tube 34. A placement groove 35 is opened inside the vacuum box 3. A positioning groove 351 is opened on one side of the placement groove. A positioning pin is inserted into the positioning groove 351. The positioning port 352 can fix sheet metal parts of special shapes and is fixed by threading a nut on the positioning port 352. The top of the vacuum box 3 is fixedly connected to the connecting port 36. The upper mold part 32 for detection also includes a driving cylinder 322. The output end of the driving cylinder 322 is fixedly connected to a connecting piece 323 that matches the connecting port 36. Through the cooperation between the driving cylinder 322 and the connecting piece 323, the connecting plate 33 of the vacuum box 3 is driven to move up and down, thereby realizing the opening and closing effect of the box inside the vacuum box 3.

[0027] refer to Figure 1-4The helium detection part 2 includes a helium detection tube, which also includes a vacuum air pump. One end of the helium detection tube is connected to the vacuum air pump, and the other end is connected to the bottom of the vacuum box 3. Air can be extracted by the vacuum air pump to make the vacuum box reach a vacuum state. The helium detection tube also has a branch pipe, which is connected to an external helium container, and the other end is connected to an injection pipe 34 inside the vacuum box 3, so that helium can be injected after the injection pipe 34 is evacuated to a vacuum state. The helium detection part 2 also includes a recovery system arranged on one side of the vacuum air pump. The recovery system is connected to the inside of the vacuum box, and can extract helium after helium is injected for clean production. The helium detection part also includes a helium pressure detection part, which includes a pressure bottle and a pressure hose connected to the pressure bottle. The other end of the pressure hose is connected to a pressure gauge. The pressure bottle is connected to the helium container, which can detect the pressure inside the helium container before injection, thereby ensuring the safety of helium injection.

[0028] The working principle of this mechanism is as follows: when conducting helium inspection, the sheet metal to be inspected is placed in the vacuum box 3, and different positioning and limiting are implemented according to different product specifications. After fixing, several injection tubes 34 are inserted into the corresponding holes and grooves on the surface of the sheet metal to isolate the internal space of the sheet metal from the space inside the vacuum box 3. At this time, the helium pressure detection part of the helium detection part 2 is started to perform inspection before ventilation, and at the same time, the internal space of the sheet metal is evacuated to a vacuum state. When the inspection is completed, helium is introduced into the space outside the internal space of the sheet metal of the vacuum box 3 to detect the pressure condition on the surface of the sheet metal, and the pressure reading is observed. The air tightness of the sheet metal parts. If there is a problem with the air tightness, it can be reprocessed. After the inspection is completed, the helium in the vacuum box 3 is extracted and returned to the recovery system for treatment to achieve the effect of clean production. When the specifications of the vacuum box 3 need to be changed, the driving cylinder 322 is started and the connecting plate 33 is lifted to expose the mold inside the vacuum box 3. The mold can be replaced and repaired. After completion, the driving cylinder 322 is driven in the opposite direction again to connect and fix the limit rod 321 and the clamping rod 311 to seal the vacuum box 3 again, thereby completing the helium inspection process and facilitating disassembly and replacement operations.

[0029] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be understood to be within the scope of protection of the present invention.

Claims

1. A split quick-change helium detection mechanism, comprising a detection machine (1) and a helium detection unit (2), characterized in that: A vacuum box (3) is fixedly provided on the detection machine (1), and the four sides of the vacuum box (3) are provided with a detection lower mold part (31), and the upper end of the detection lower mold part (31) is provided with a detection upper mold part (32), and a connecting plate (33) is connected between the detection lower mold part (31) and the detection upper mold part (32), and a surface of the connecting plate (33) is provided with a plurality of threaded holes (331), and each of the threaded holes (331) is provided with a fixing bolt (332). Limiting rods (321) are arranged around the upper mold part (32) of the detection, and clamping rods (311) matched with the limiting rods (321) are arranged around the lower mold part (31). Several injection pipes (34) are arranged inside the vacuum box (3), and the helium detection part (2) is connected to each of the injection pipes (34). The product (11) to be detected is placed in the vacuum box (3), and the injection pipes (34) are inserted into the pores on the surface of the product (11) to be detected.

2. The split quick-change helium detection mechanism according to claim 1, characterized in that: A placement slot (35) is provided inside the vacuum box (3), a positioning slot (351) is provided on one side of the placement slot, and a positioning opening (352) for inserting a positioning pin is provided in the positioning slot (351).

3. The split quick-change helium detection mechanism according to claim 1, characterized in that: The top of the vacuum box (3) is fixedly connected to a connection port (36), and the detection upper mold part (32) further includes a driving cylinder (322), and the output end of the driving cylinder (322) is fixedly connected to a connecting piece (323) that matches the connection port (36).

4. The split quick-change helium detection mechanism according to claim 1, characterized in that: The helium detection unit (2) includes a helium detection tube, and the helium detection unit (2) also includes a vacuum air pump. One end of the helium detection tube is connected to the vacuum air pump, and the other end is connected to the bottom of the vacuum box (3).

5. The split quick-change helium detection mechanism according to claim 4, characterized in that: The helium detection unit (2) further includes a recovery system arranged on one side of the vacuum air pump, and the recovery system is communicated with the interior of the vacuum box (3).

6. The split quick-change helium detection mechanism according to claim 1, characterized in that: The helium detection unit (2) also includes a helium pressure detection unit, which includes a pressure bottle and a pressure hose connected to the pressure bottle, and the other end of the pressure hose is connected to a pressure gauge.

Images