An online double-station helium detection device for electric compressor

Abstract

The application discloses an online double-station helium detection equipment for electric compressors, comprising a rack, a conveying backflow module, a double-station vacuum test box module, a leak detector and a gas circuit unit are arranged on the rack. The conveying backflow module comprises an inlet upflow conveying line, a feeding conveying line, a first detection transfer line, a second detection transfer line, a discharging upflow conveying line and an L-shaped tray backflow conveying line, and a jacking transfer mechanism, a proximity switch and a blocking cylinder are arranged on each conveying line. The double-station vacuum test box module comprises a first vacuum test box and a second vacuum test box, and is connected with a vacuum pump and a pressure stabilizing pump respectively. The jacking transfer mechanism can jack up the tray to be in sealing connection with the vacuum test box, and the leak detector is connected with the inside of the test box. The application realizes double-station parallel online helium detection and tray automatic circulation backflow of the electric compressor, has high detection efficiency, good automation degree and compact structure, and is suitable for batch production lines.

Description

Technical Field

[0001] This invention relates to the field of helium detection equipment technology, and in particular to an online dual-station helium detection device for electric compressors. Background Technology

[0002] As a core component of the air conditioning system in new energy vehicles, the sealing performance of electric compressors directly affects the overall performance and safety of the machine. Helium leak detection technology is widely used in compressor airtightness testing due to its high sensitivity and reliability. However, traditional helium leak detection equipment mostly adopts a single-station structure, resulting in low detection efficiency and difficulty in meeting the needs of mass production. Furthermore, workpiece loading / unloading and pallet return largely rely on manual methods, leading to discontinuous testing cycles and insufficient automation of the production line. In addition, existing equipment has a loose layout, occupies a large space, and cannot achieve efficient online dual-station parallel testing and automatic pallet circulation. Therefore, there is an urgent need to develop an online testing device with a compact structure, high degree of automation, capable of dual-station parallel helium leak detection and integrating conveying and return functions. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the main objective of this invention is to provide an online dual-station helium detection device for electric compressors that has high detection efficiency, high degree of automation, accurate positioning and compact space design.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an online dual-station helium detection device for electric compressors, comprising a frame, on which a conveying and return module, a dual-station vacuum test chamber module, a leak detector, and a gas path unit are mounted; the conveying and return module includes an inlet upstream conveyor line, a feeding conveyor line perpendicular to the inlet upstream conveyor line, a first detection transfer line and a second detection transfer line perpendicular to the feeding conveyor line, an outlet upstream conveyor line disposed on one side of the first detection transfer line and the second detection transfer line, and an L-shaped tray return conveyor line located below the inlet upstream conveyor line and the outlet upstream conveyor line, the L-shaped tray return conveyor line including a first straight conveyor section parallel to the inlet upstream conveyor line and a second straight conveyor section parallel to the outlet upstream conveyor line, the first straight conveyor section and the second straight conveyor section being connected by an arc-shaped conveyor section, wherein the inlet... A lifting and transferring mechanism is fixedly installed on the upstream conveyor line, the feeding conveyor line, the first detection and transfer line, and the second detection and transfer line. Proximity switches and blocking cylinders are respectively installed on the upstream feeder line, the feeding conveyor line, the first detection and transfer line, and the second detection and transfer line. The dual-station vacuum test chamber module includes a first vacuum test chamber located above the first detection and transfer line and a second vacuum test chamber located above the second detection and transfer line. The first and second vacuum test chambers are respectively connected to a vacuum pump and a pressure stabilizing pump. The lifting and transferring mechanism transfers the tray between the conveyor lines and can lift the tray to create a sealed connection between the tray and the first and second vacuum test chambers. The leak detector is internally connected to the first and second vacuum test chambers. The air circuit unit connects the cylinders in the dual-station vacuum test chamber module, the leak detector, and the conveying return module.

[0005] Preferably, the lifting and transferring mechanism includes a support frame, on which a lifting cylinder and several optical shafts connected by linear bearings are mounted. The piston rod of the lifting cylinder is fixedly connected to a connecting plate, and the connecting plate is fixedly connected to the optical shafts. The top of the several optical shafts is connected to a bearing plate. The upper part of the bearing plate is connected to a mounting plate via a connecting block. Two pairs of chain drive assemblies are mounted on the mounting plate. A drive assembly is mounted at the bottom of the bearing plate. The drive assembly includes a drive motor, which is connected to a drive shaft via a drive sprocket and a drive chain. The drive shaft is connected to the bearing plate via ball bearings. Drive sprockets are mounted at both ends of the drive shaft. Each of the two pairs of chain drive assemblies includes two driven sprockets. The straight line formed by the two driven sprockets is perpendicular to the direction of the guide rail. The drive shaft drives the two pairs of chain drive assemblies to rotate via the drive chain. When the lifting cylinder lifts the bearing plate, the drive chain contacts the bottom of the pallet and, driven by the drive motor, transfers the pallet.

[0006] Preferably, a pair of vertical limiting plates are provided at the lifting and transfer mechanism on both the feeding conveyor line and the unloading and upstream conveyor line.

[0007] Preferably, the side of the tray is provided with several rollers that can contact the proximity switch.

[0008] Preferably, the mounting plate has lateral limiting plates on both sides at the corresponding chain drive components.

[0009] Compared with the prior art, the present invention has the following advantages, and the detection efficiency is greatly improved: the dual-station parallel detection structure is adopted, and the two vacuum test chambers can simultaneously perform helium testing on two electric compressors, which shortens the detection cycle by nearly half compared with the traditional single-station equipment, thus meeting the needs of mass production.

[0010] High degree of automation, enabling continuous online operation: Through the combination of lifting and transfer mechanism and multiple conveyor lines, the entire process of pallet loading, distribution, lifting and sealing, detection, unloading and empty pallet return is completed, and the detection cycle is continuous and stable.

[0011] High space utilization and compact layout: The L-shaped pallet return conveyor line is cleverly arranged below the infeed and unfeed feeder lines, avoiding additional floor space occupation, making the whole machine compact and easy to embed and install in the production line.

[0012] Accurate positioning and high detection reliability: The proximity switch and the blocking cylinder work together to achieve precise positioning of the tray, and the lifting and transfer mechanism seals the tray to the vacuum test chamber, ensuring that there is no external leakage interference during the test, and the leak detector test results are true and reliable.

[0013] Highly adaptable and easy to maintain: Each conveyor line and lifting and transferring mechanism adopts a modular design, which can be adjusted according to different specifications of compressor trays, and standard parts such as chain drive components and optical shafts are easy to replace, reducing equipment maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an online dual-station helium detection device for electric compressors according to the present invention;

[0015] Figure 2 A schematic diagram of an online dual-station helium detector for electric compressors, with the housing omitted.

[0016] Figure 3 Structural diagram omitting the leak detector, vacuum pump, pressure stabilizing pump, and gas path unit. Figure 1 ;

[0017] Figure 4 Structural diagram omitting the leak detector, vacuum pump, pressure stabilizing pump, and gas path unit. Figure 2 ;

[0018] Figure 5 Structural diagram omitting the leak detector, vacuum pump, pressure stabilizing pump, and gas path unit. Figure 3 (The arrows in the diagram indicate the direction of the tray flow.)

[0019] Figure 6 This is a schematic diagram of the lifting and transplanting mechanism of the present invention. Figure 1 ;

[0020] Figure 7 This is a schematic diagram of the lifting and transplanting mechanism of the present invention. Figure 2 .

[0021] In the diagram: 1. Frame; 2. Conveyor return module; 3. Dual-station vacuum test chamber module; 4. Leak detector; 5. Air circuit unit; 6. Feeding upstream conveyor line; 7. Feeding conveyor line; 8. First inspection and transfer line; 9. Second inspection and transfer line; 10. Unloading upstream conveyor line; 11. L-shaped tray return conveyor line; 12. First linear conveyor section; 13. Second linear conveyor section; 14. Arc-shaped conveyor section; 15. Lifting and transfer mechanism; 19. Proximity switch; 20. Blocking cylinder; 21. Vertical limit plate; 22. Tray 23. Disc; 24. Support frame; 25. Lifting cylinder; 26. Linear bearing; 27. Optical shaft; 28. Connecting plate; 29. ​​Bearing plate; 30. Mounting plate; 31. Drive motor; 32. Drive sprocket; 33. Drive shaft; 34. Ball bearing; 35. Drive sprocket; 36. Driven sprocket; 37. Lateral limiting plate; 38. Roller; 39. Drive chain; 40. Open fixing ring; 41. Vacuum pump; 42. Pressure stabilizing pump; 43. First vacuum test chamber; 44. Second vacuum test chamber. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] like Figure 1As shown, an online dual-station helium testing device for electric compressors includes a frame 1, on which a conveying and return module 2, a dual-station vacuum testing chamber module 3, a leak detector 4, and a gas path unit 5 are mounted. The conveying and return module 2 includes an inlet upstream conveyor line 6, a feeding conveyor line 7 perpendicular to the inlet upstream conveyor line 6, a first detection transfer line 8 and a second detection transfer line 9 perpendicular to the feeding conveyor line 7, an unloading upstream conveyor line 10 located on one side of the first detection transfer line 8 and the second detection transfer line 9, and an L-shaped tray return conveyor line 11 located below the inlet upstream conveyor line 6 and the unloading upstream conveyor line 10. The L-shaped tray return conveyor line 11 includes a first straight conveyor section 12 parallel to the inlet upstream conveyor line 6 and a second straight conveyor section 13 parallel to the unloading upstream conveyor line 10. The first straight conveyor section 12 and the second straight conveyor section 13 are connected by an arc-shaped conveyor section 14. The inlet upstream conveyor line 6, the feeding conveyor line 7, the first detection transfer line 8 and the second detection transfer line 9 are mounted on the frame 1, and the second detection transfer line 9 is mounted on the first detection transfer line 8 and the second detection transfer line 9. A lifting and transferring mechanism 15 is fixedly installed on both the first detection transfer line 8 and the second detection transfer line 9. A proximity switch 19 and a blocking cylinder 20 are respectively installed on the feed inlet conveyor line 6, the feeding conveyor line 7, the first detection transfer line 8, and the second detection transfer line 9. The dual-station vacuum test chamber module 3 includes a first vacuum test chamber 43 installed above the first detection transfer line 8 and a second vacuum test chamber 44 installed above the second detection transfer line 9. The first vacuum test chamber 43 and the second vacuum test chamber 44 are respectively connected to a vacuum pump 41 and a pressure stabilizing pump 42. The lifting and transferring mechanism transfers the tray 22 between the conveyor lines, and the lifting and transferring mechanism 15 can lift the tray 22 so that the tray 22 is sealed to the first vacuum test chamber 43 and the second vacuum test chamber 44. The leak detector 4 is internally connected to the first vacuum test chamber 43 and the second vacuum test chamber 44. The air circuit unit 5 is connected to each cylinder in the dual-station vacuum test chamber module 3, the leak detector 4, and the conveying return module 2.

[0024] Preferably, the lifting and transferring mechanism 15 includes a support frame 23, on which a lifting cylinder 24 and a plurality of optical shafts 26 connected by linear bearings 25 are mounted. The piston rod of the lifting cylinder 24 is fixedly connected to a connecting plate 27, which is fixedly connected to the optical shafts 26. The tops of the plurality of optical shafts 26 are connected to a bearing plate 28. The upper part of the bearing plate 28 is connected to a mounting plate 29 via a connecting block. Two pairs of chain drive assemblies are mounted on the mounting plate 29. A drive assembly is mounted at the bottom of the bearing plate 28, and the drive assembly includes a drive motor 30. The drive motor 30 is connected to the drive shaft 33 via the drive sprocket 31 and the drive chain 32. The drive shaft 33 is connected to the support plate 28 via the ball bearing 34. Drive sprockets 35 are respectively provided at both ends of the drive shaft 33. The two pairs of chain drive assemblies each include two driven sprockets 36. The straight line formed by the two driven sprockets 36 is perpendicular to the direction of the guide rail. The drive shaft 33 drives the two pairs of chain drive assemblies to rotate via the drive chain 39. When the lifting cylinder 24 drives the support plate 28 to rise, the drive chain 39 contacts the bottom of the pallet 22 and moves the pallet 22 under the drive of the drive motor 30.

[0025] Preferably, a pair of vertical limiting plates 21 are respectively provided at the lifting and transfer mechanism 15 on the feeding conveyor line 7 and the unloading and upward conveyor line 10.

[0026] Preferably, the side of the tray 22 is provided with a plurality of rollers 38 that can contact the proximity switch 19.

[0027] Preferably, the mounting plate 29 has lateral limiting plates 37 on both sides at the corresponding chain drive components. The connecting plate 27 is fixedly connected to the optical axis 26 via an open fixing ring 40.

[0028] The core technology of this online dual-station helium detection equipment for electric compressors lies in the coordinated action of a compact L-shaped tray return conveyor line 11 and multiple lifting and transferring mechanisms 15. This enables automatic feeding, online detection, unloading, and automatic circulation of empty trays 22 within the dual-station vacuum test chamber, thereby achieving continuous and efficient helium leak detection.

[0029] When the equipment is operating, the electric compressor to be tested is placed on a dedicated tray 22, which first enters the feed upstream conveyor line 6. This conveyor line is equipped with a proximity switch 19 and a blocking cylinder 20. When the tray 22 is conveyed to the position of the lifting and transferring mechanism 15, which intersects perpendicularly with the feeding conveyor line 7, the proximity switch 19 detects that the tray 22 is in place, and the blocking cylinder 20 actuates to precisely position the tray 22. Subsequently, the lifting and transferring mechanism 15 lifts the tray 22 upwards and transfers it to the feeding conveyor line 7. The conveying direction of the feeding conveyor line 7 is perpendicular to the feed upstream conveyor line 6, and it is also equipped with a lifting and transferring mechanism 15. Depending on the idle status of the first detection and transferring line 8 or the second detection and transferring line 9, the lifting and transferring mechanism 15 on the feeding conveyor line 7 orients and transfers the tray 22 to either the first detection and transferring line 8 or the second detection and transferring line 9, achieving automatic dual-station allocation.

[0030] The first and second inspection transfer lines 8 and 9 are parallel to each other and perpendicular to the feeding conveyor line 7. Above them are the first vacuum test chamber 43 and the second vacuum test chamber 44, respectively. When the tray 22 is conveyed along the inspection transfer line to the area directly below the vacuum test chamber, the proximity switch 19 is activated, the blocking cylinder 20 is positioned, and the lifting transfer mechanism 15 on the transfer line actuates again, smoothly lifting the tray 22 upwards. The top of the tray 22 forms a sealed connection with the lower edge of the vacuum test chamber, thus completely enclosing the electric compressor inside the vacuum test chamber. Subsequently, the vacuum pump 41 and the pressure stabilizing pump 42 start, evacuating the inside of the test chamber and stabilizing the pressure. The leak detector 4 then begins operation: if there is a leak inside the compressor or at the seal, helium gas will escape and be detected by the leak detector 4, thus determining whether the product is qualified.

[0031] After the inspection is completed, the lifting and transfer mechanism 15 descends, and the pallet 22 returns to the inspection and transfer line, continuing to be conveyed forward to the unloading upstream conveyor line 10. Operators or subsequent equipment remove the qualified and unqualified products according to the results given by the leak detector 4. The empty pallet 22 continues to advance along the unloading upstream conveyor line 10. Upon reaching its end, the empty pallet 22 is manually transferred to the L-shaped pallet return conveyor line 11 below. This return conveyor line consists of a first straight conveyor section 12, an arc-shaped conveyor section 14, and a second straight conveyor section 13, arranged in an L-shape below the infeed upstream conveyor line 6 and the unloading upstream conveyor line 10. The empty pallet 22 passes sequentially through the second straight conveyor section 13, the arc-shaped conveyor section 14, and the first straight conveyor section 12, finally returning to the beginning of the infeed upstream conveyor line 6. The empty pallet 22 can then be placed into the infeed upstream conveyor line 6 by workers to begin the next cycle.

[0032] The specific operating principle of the lifting and transfer mechanism 15 is as follows: the lifting cylinder 24 pushes the connecting plate 27, which in turn drives the optical shaft 26 to rise along the linear bearing 25, thereby lifting the bearing plate 28, the mounting plate 29, and the chain drive assembly as a whole. The drive motor 30 drives the drive shaft 33 to rotate via the drive sprocket 31 and the drive chain 32. The drive sprockets 35 at both ends of the drive shaft 33 then drive the two pairs of chain drive assemblies to rotate synchronously via the drive chain 39. When the chain rises to contact the bottom surface of the pallet 22, the friction of the chain pushes the pallet 22 to move laterally, realizing the reversing conveying between the conveyor lines. The entire mechanism has a compact structure, and the lifting and transfer actions are continuous, ensuring the efficient flow of the pallet 22 between the various conveyor lines.

[0033] The air circuit unit 5 is responsible for providing a stable source of compressed air and vacuum to the dual-station vacuum test chamber, leak detector 4, and all cylinders (lifting cylinder 24, blocking cylinder 20, etc.) to ensure the coordination and reliability of the whole machine's operation.

[0034] The present invention has the following significant technical effects:

[0035] Significantly improved testing efficiency: Adopting a dual-station parallel testing structure, two vacuum test chambers can simultaneously perform helium testing on two electric compressors, reducing the testing cycle time by nearly half compared to traditional single-station equipment, thus meeting the needs of mass production.

[0036] High degree of automation, enabling continuous online operation: Through the combination of lifting and transfer mechanism 15 and multiple conveyor lines, the entire process of loading, distributing, lifting and sealing, testing, unloading and empty pallet 22 return of pallet 22 is completed, and the testing cycle is continuous and stable.

[0037] High space utilization and compact layout: The L-shaped pallet return conveyor line 11 is cleverly arranged below the infeed upstream conveyor line 6 and the unfeed upstream conveyor line 10, avoiding additional floor space occupation, making the whole machine compact and easy to embed and install in the production line.

[0038] Accurate positioning and high detection reliability: The proximity switch 19 and the blocking cylinder 20 work together to achieve precise positioning of the tray 22. The lifting and transfer mechanism 15 seals the tray 22 with the vacuum test chamber, ensuring that there is no external leakage interference during the test. The leak detector 4 provides true and reliable test results.

[0039] Highly adaptable and easy to maintain: Each conveyor line and lifting and transferring mechanism 15 adopts a modular design, which can be adjusted according to different specifications of compressor trays 22, and standard parts such as chain drive components and optical shafts 26 are easy to replace, reducing equipment maintenance costs.

[0040] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An online dual-station helium detection device for electric compressors, comprising a frame, characterized in that: The frame is equipped with a conveyor return module, a dual-station vacuum test chamber module, a leak detector, and a gas path unit. The conveyor return module includes an upstream feed conveyor line, a feeding conveyor line perpendicular to the upstream feed conveyor line, a first detection transfer line and a second detection transfer line perpendicular to the feeding conveyor line, an upstream discharge conveyor line located on one side of the first and second detection transfer lines, and an L-shaped tray return conveyor line located below the upstream feed conveyor line and the upstream discharge conveyor line. The L-shaped tray return conveyor line includes a first straight conveyor section parallel to the upstream feed conveyor line and a second straight conveyor section parallel to the upstream discharge conveyor line. The first and second straight conveyor sections are connected by an arc-shaped conveyor section. The upstream feed conveyor line, the feeding conveyor line, the first detection transfer line, and the second detection transfer line are all connected. Each transfer line is fixedly equipped with a lifting and transfer mechanism. The feed inlet conveyor line, feeding conveyor line, first detection transfer line, and second detection transfer line are each equipped with a proximity switch and a blocking cylinder. The dual-station vacuum test chamber module includes a first vacuum test chamber located above the first detection transfer line and a second vacuum test chamber located above the second detection transfer line. The first and second vacuum test chambers are respectively connected to a vacuum pump and a pressure stabilizing pump. The lifting and transfer mechanism transfers the tray between the various conveyor lines and can lift the tray to create a sealed connection between the tray and the first and second vacuum test chambers. The leak detector is internally connected to the first and second vacuum test chambers. The air circuit unit connects the cylinders in the dual-station vacuum test chamber module, the leak detector, and the conveying return module.

2. The online dual-station helium detection equipment for electric compressors according to claim 1, characterized in that: The lifting and transferring mechanism includes a support frame, on which a lifting cylinder and several optical shafts connected by linear bearings are mounted. The piston rod of the lifting cylinder is fixedly connected to a connecting plate, which is fixedly connected to the optical shafts. The top of the several optical shafts is connected to a bearing plate. The upper part of the bearing plate is connected to a mounting plate via a connecting block. Two pairs of chain drive assemblies are mounted on the mounting plate. A drive assembly is mounted at the bottom of the bearing plate. The drive assembly includes a drive motor, which is connected to a drive shaft via a drive sprocket and a drive chain. The drive shaft is connected to the bearing plate via ball bearings. Drive sprockets are mounted at both ends of the drive shaft. Each of the two pairs of chain drive assemblies includes two driven sprockets. The straight line formed by the two driven sprockets is perpendicular to the direction of the guide rail. The drive shaft drives the two pairs of chain drive assemblies to rotate via the drive chain. When the lifting cylinder lifts the bearing plate, the drive chain contacts the bottom of the pallet and, driven by the drive motor, transfers the pallet.

3. The online dual-station helium detection equipment for electric compressors according to claim 1, characterized in that: The feeding conveyor line and the unloading and upstream conveyor line are each equipped with a pair of vertical limiting plates at the lifting and transfer mechanism.

4. The online dual-station helium detection equipment for electric compressors according to claim 1, characterized in that: The tray has several rollers on its side that can contact the proximity switch.

5. The online dual-station helium detection equipment for electric compressors according to claim 1, characterized in that: The mounting plate has lateral limiting plates on both sides at the corresponding chain drive components.

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