Upper clamp assembly of tube core leak detection machine

Abstract

The utility model discloses an upper clamp assembly of a tube core leak detection machine, which comprises an upper clamp with a downward opening and a lifting mechanism for driving the upper clamp to cover the outer side of a tube core, an inflation cavity for accommodating the tube core is arranged in the upper clamp, and the inflation cavity is connected with an air source, and is characterized in that a movable guide rod is arranged between the upper clamp and the lifting mechanism; the guide rod penetrates through the lifting mechanism and is vertically and slidably connected with the lifting mechanism, the top and the bottom of the guide rod movably abut against the upper side and the lower side of the lifting mechanism respectively, the outer side of the guide rod is sleeved with a spring, and the upper clamp is hung on the lifting mechanism through the guide rod. According to the utility model, the guide rod is arranged as a buffer part to provide a buffer stroke for the upper clamp, and when the upper clamp and the lower clamp are positioned and butted, the upper clamp and the lower clamp are flexibly extruded, so that the impact force is small, and the conditions of fit sealing, noise reduction and clamp damage prevention are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of magnetron equipment technology, and in particular to an upper clamp assembly for a core leak detector. Background Technology

[0002] Microwave ovens undergo numerous tests during manufacturing and before leaving the factory, particularly leak testing of the core assembly. The core, comprising the cathode, anode, and exhaust pipe assemblies, is assembled by welding. Afterward, the core is vacuum-sealed, necessitating inspection for cracks, leaks, and ensuring the tightness of the welds between components. Since manual inspection is inefficient and prone to errors, a core leak detector is used for leak detection.

[0003] Patent No. ZL 202022643647.X discloses a leak detection device for a tube core. The device performs leak detection on the core and includes an upper clamp and a lower clamp. Both clamps are cylindrical structures with openings on one side, and the openings are positioned opposite each other. The inner diameter of the upper clamp is larger than the outer diameter of the tube core. Driven by a cylinder, a telescopic shaft moves a first support plate downwards, causing the upper clamp to press against and cover the cathode and anode assemblies, with the opening of the upper clamp contacting and fitting against the second support plate. However, the aforementioned patent lacks a buffer component before the upper and lower clamps close. The cylinder directly applies pressure to the upper clamp, resulting in rigid compression between them. This creates a large impact force, easily damaging the clamps, and also causes problems such as high noise and poor sealing. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an upper clamping assembly for a core leak detector.

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

[0006] An upper clamp assembly for a tube core leak detector includes an upper clamp with an opening facing downwards and a lifting mechanism that drives the upper clamp to close onto the outside of the tube core. The upper clamp has an inflation chamber for accommodating the tube core, and the inflation chamber is connected to an air source. The upper clamp and the lifting mechanism are characterized by a movable guide rod that passes through the lifting mechanism and is slidably connected to it vertically. The top and bottom of the guide rod are respectively in contact with the upper and lower sides of the lifting mechanism. A spring is sleeved on the outside of the guide rod. The upper clamp is hung on the lifting mechanism through the guide rod.

[0007] Preferably, the top of the inflation chamber is provided with a through air inlet, which is positioned relative to the top of the upper clamp. One end of the air inlet is connected to the inflation chamber, and the other end is connected to an air source.

[0008] Preferably, the air inlet has an L-shaped structure, including a vertical hole opening upward from the top of the inflation chamber and a horizontal hole opening inward from the side wall of the upper clamp, with the horizontal hole and the vertical hole connected together.

[0009] Preferably, the top of the guide rod is provided with a vertically penetrating air inlet, and the top of the upper clamp is provided with a through hole corresponding to the air inlet. One end of the air inlet is connected to the inflation chamber through the through hole, and the other end of the air inlet is connected to the air source.

[0010] Preferably, the top of the upper clamp is provided with a limiting groove for the guide rod to be inserted, and the limiting groove is axially aligned with the guide rod, the air supply hole, and the through hole.

[0011] Preferably, the lifting mechanism includes a horizontally arranged mounting plate and a lifting cylinder that drives the mounting plate to move vertically up and down, with a guide rod passing through the mounting plate.

[0012] Preferably, a limiting ring is sleeved on the top of the guide rod, and the limiting ring movably abuts against the upper side of the mounting plate. The bottom of the guide rod is provided with a stroke block connected to the upper clamp, and the stroke block movably abuts against the lower side of the mounting plate.

[0013] Preferably, the mounting plate has a vertically penetrating mounting hole, a bushing is inserted into the mounting hole, and a guide rod is located inside the bushing and is slidably connected to the bushing.

[0014] This utility model has the following beneficial effects:

[0015] This invention utilizes a guide rod as a buffer component. Initially, the top of the guide rod abuts against the upper side of the lifting mechanism, and the upper clamp is suspended from the lifting mechanism via the guide rod. When leak detection is required, the tube core is placed in the lower clamp of the tube core leak detector. The lifting mechanism moves downward, causing the suspended upper clamp to move downward as well. The upper clamp gradually closes onto the outside of the tube core until it is positioned and aligned with the lower clamp. Then, the top of the guide rod separates from the upper side of the lifting mechanism, and the guide rod slides relative to the lifting mechanism. The spring is gradually compressed, providing spring force to the upper clamp, causing it to press against the lower clamp, achieving flexible compression. This continues until the bottom of the guide rod abuts against the lower side of the lifting mechanism, where the lifting mechanism provides pressure to the upper clamp, achieving pressurized closure between the upper and lower clamps. Because the guide rod provides a buffer stroke for the upper clamp, the upper and lower clamps are positioned and aligned with each other through flexible compression, resulting in less impact force. This facilitates a tight seal, reduces noise, and prevents damage to the clamps. Attached Figure Description

[0016] Figure 1 This is an assembly diagram of the upper clamping assembly described in this utility model.

[0017] Figure 2 This is a schematic diagram of the upper clamp assembly described in this utility model.

[0018] Figure 3 This is a schematic diagram of the assembly of the upper and lower clamps described in this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the core described in this utility model.

[0020] Figure 5 This is a schematic diagram of the state of the upper clamping assembly described in this utility model. Figure 1

[0021] Figure 6 This is a schematic diagram of the state of the upper clamping assembly described in this utility model. Figure 2

[0022] Figure description: 1. Core tube; 2. Upper clamp; 3. Inflation chamber; 4. Guide rod; 5. Air inlet; 6. Air outlet; 7. Through hole; 8. Limiting groove; 9. Mounting plate; 10. Lifting cylinder; 11. Limiting ring; 12. Stroke block; 13. Bushing; 14. Lower clamp. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1 to 6 One embodiment provided by this utility model:

[0025] An upper clamp assembly for a tube core leak detector includes an upper clamp 2 with its opening facing downwards, and a lifting mechanism that drives the upper clamp 2 to cover the outside of the tube core 1. The upper clamp 2 has an inflation chamber 3 inside that accommodates the tube core 1, and the inflation chamber 3 is connected to an air source. A movable guide rod 4 is provided between the upper clamp 2 and the lifting mechanism. The guide rod 4 passes through the lifting mechanism and is slidably connected to the lifting mechanism vertically. The top and bottom of the guide rod 4 are movable and abut against the upper and lower sides of the lifting mechanism, respectively. A spring is sleeved on the outside of the guide rod 4. The upper clamp 2 is hung on the lifting mechanism through the guide rod 4.

[0026] The upper clamp 2 is a downward-opening cylindrical structure. The inflation chamber 3 is located inside the upper clamp 2, and its inner diameter is larger than that of the core 1, allowing it to accommodate the core 1. A gas source is connected to the inflation chamber 3, allowing the input of gases such as helium and nitrogen. Helium is used as a detection gas for leak detection of the core 1, while nitrogen is used as a purging gas to expel air from the inflation chamber 3. The lifting mechanism has a vertical extension function, enabling the upper clamp 2 to descend and cover the outside of the core 1.

[0027] The guide rod 4 is located between the upper clamp 2 and the lifting mechanism, and is vertically movable. The guide rod 4 is inserted into the lifting mechanism and is vertically slidably connected to it. The guide rod 4 passes through the lifting mechanism, and its top and bottom ends extend from the upper and lower sides of the lifting mechanism, respectively. The longitudinal section of the guide rod 4 is an I-shaped structure, and the top and bottom of the guide rod 4 can be umbrella-shaped structures, extending outward relative to the middle of the guide rod 4.

[0028] The top of guide rod 4 movably abuts against the upper side of the lifting mechanism, limiting the downward stroke of guide rod 4. Upper clamp 2 is connected to guide rod 4 and is suspended from the lifting mechanism via guide rod 4. The bottom of guide rod 4 movably abuts against the lower side of the lifting mechanism, limiting the upward stroke of guide rod 4. When the bottom of guide rod 4 abuts against the lower side of the lifting mechanism, the lifting mechanism presses against upper clamp 2 via guide rod 4, providing clamping force to upper clamp 2. A spring is sleeved on the outside of guide rod 4 and is vertically installed. One end of the spring abuts against the lower side of the lifting mechanism, and the other end abuts against the bottom of guide rod 4. As guide rod 4 slides relative to the lifting mechanism, the spring is gradually compressed, providing spring force to upper clamp 2, causing upper clamp 2 to press against lower clamp 14, achieving flexible extrusion.

[0029] This invention uses a guide rod 4 as a buffer component. In the initial state, the top of the guide rod 4 abuts against the upper side of the lifting mechanism, and the upper clamp 2 is suspended from the lifting mechanism via the guide rod 4. When leak detection is required, the core 1 is placed in the lower clamp 14 of the core 1 leak detector. The lifting mechanism moves downward, causing the suspended upper clamp 2 to move downward. The upper clamp 2 gradually covers the outside of the core 1 until it is positioned and aligned with the lower clamp 14. Then, the top of the guide rod 4 separates from the upper side of the lifting mechanism, and the guide rod 4 slides relative to the lifting mechanism. The spring is gradually compressed, and the spring provides spring force to the upper clamp 2, causing the upper clamp 2 to press against the lower clamp 14, achieving flexible compression. Until the bottom of the guide rod 4 abuts against the lower side of the lifting mechanism, the lifting mechanism provides pressure to the upper clamp 2, achieving pressurized closure of the upper clamp 2 and the lower clamp 14. Since the guide rod 4 provides a buffer stroke for the upper clamp 2, when the upper clamp 1 and the lower clamp 14 are positioned and docked, the two are flexibly squeezed, and the impact force is small, which is conducive to sealing, reducing noise, and avoiding damage to the clamps.

[0030] In this embodiment, preferably, the top of the inflation chamber 3 is provided with a through air inlet 5, which is positioned relative to the top of the upper clamp 2. One end of the air inlet 5 is connected to the inflation chamber 3, and the other end of the air inlet 5 is connected to an air source.

[0031] The air inlet 5 is located at the top of the inflation chamber 3 and is a through-hole. The air inlet 5 is positioned relative to the top of the upper clamp 2, and can be located along the side wall or top surface of the upper clamp 2. One end of the air inlet 5 connects to the inflation chamber 3, and the other end connects to a gas source. Helium or nitrogen is input through the gas source and enters the top of the inflation chamber 3 through the air inlet 5. The helium or nitrogen moves from top to bottom, thereby forcing the air inside the inflation chamber 3 to be expelled from the bottom of the inflation chamber 3, achieving a better air removal effect.

[0032] An air inlet 5 is provided, which is positioned relative to the top of the upper clamp 2. In this embodiment, preferably, the air inlet 5 has an L-shaped structure, including a vertical hole opening upward from the top of the inflation chamber 3 and a horizontal hole opening inward from the side wall of the upper clamp 2. The horizontal hole and the vertical hole are connected and connected.

[0033] The air inlet 5 has an L-shaped structure, opening inward from the side wall of the upper clamp 2 and extending downward into the inflation chamber 3. The air inlet 5 includes interconnected horizontal and vertical holes, which are sized and meet at right angles. The vertical holes open upward from the top of the inflation chamber 3, and the horizontal holes open inward from the side wall of the upper clamp 2. Since the air inlet 5 needs to be connected to air supply components such as air pipes and nozzles, compared to a vertically positioned air inlet 5, the L-shaped design places the inlet laterally, reducing the likelihood of interference or collision between the lifting mechanism and air supply components during operation.

[0034] In this embodiment, preferably, the top of the guide rod 4 is provided with a vertically penetrating air inlet 6, and the top of the upper clamp 2 is provided with a through hole 7 corresponding to the air inlet 6. One end of the air inlet 6 is connected to the inflation chamber 3 through the through hole 7, and the other end of the air inlet 6 is connected to the air source.

[0035] The gas inlet 6 is located at the top of the guide rod 4, is vertically through, and is axially aligned with the guide rod 4. The through hole 7 is located at the top of the upper clamp 2, matches the shape and position of the gas inlet 6, and is vertically through. One end of the gas inlet 6 is connected to the inflation chamber 3 through the through hole 7, and the other end of the gas inlet 6 is connected to the gas source, so that the inflation chamber 3 has two gas supply channels. The inlet 5 and the gas inlet 6 can be connected to the helium gas source and the nitrogen gas source, respectively. During the leak detection process of the core 1, low-cost nitrogen is first introduced to expel the air in the inflation chamber 3, and then helium for testing is introduced to fill the inflation chamber 3, thereby achieving the purpose of helium leak detection.

[0036] In this embodiment, preferably, the top of the upper clamp 2 is provided with a limiting groove 8 for the guide rod 4 to be embedded, and the limiting groove 8 is axially aligned with the guide rod 4, the air supply hole 6, and the through hole 7.

[0037] The limiting groove 8 is located at the top of the upper clamp 2 and is a downward-opening circular groove structure, which matches the bottom of the guide rod 4. The guide rod 4 is embedded in the limiting groove 8 and is fastened to the upper clamp 2 by screws. At the same time, the limiting groove 8 is axially aligned with the guide rod 4, the air inlet 6, and the through hole 7, ensuring that when the limiting groove 8 and the guide rod 4 are assembled, the air inlet 6 and the through hole 7 are aligned, improving the assembly sealing between the guide rod 4 and the upper clamp 2.

[0038] In this embodiment, preferably, the lifting mechanism includes a horizontally arranged mounting plate 9 and a lifting cylinder 10 that drives the mounting plate 9 to move vertically up and down, with a guide rod 4 passing through the mounting plate 9.

[0039] The mounting plate 9 is horizontally positioned and connected to the telescopic end of the lifting cylinder 10. The guide rod 4 passes through the mounting plate 9, with its top located on the upper side of the mounting plate 9 and its bottom on the lower side. The middle of the guide rod 4 is vertically slidably connected to the mounting plate 9. Multiple sets of guide rods 4 and upper clamps 2 can be arranged side-by-side on the same mounting plate 9. Driven by the lifting cylinder 10, the mounting plate 9 moves vertically up and down, thereby causing multiple sets of guide rods 4 and upper clamps 2 to move vertically up and down, ensuring consistent movement.

[0040] In this embodiment, preferably, a limiting ring 11 is sleeved on the top of the guide rod 4, and the limiting ring 11 is in movable contact with the upper side of the mounting plate 9. The bottom of the guide rod 4 is provided with a stroke block 12 connected to the upper clamp 2, and the stroke block 12 is in movable contact with the lower side of the mounting plate 9.

[0041] The limiting ring 11 is located at the top of the guide rod 4, sleeved on the outside of the guide rod 4, and movably abuts against the upper side of the mounting plate 9, limiting the downward travel of the guide rod 4. The travel block 12 is located at the bottom of the guide rod 4, sleeved on the outside of the guide rod 4, and movably abuts against the lower side of the mounting plate 9, limiting the upward travel of the guide rod 4. The travel block 12 can be integrally set with the guide rod 4 and fastened to the upper clamp 2 to reduce assembly clearance.

[0042] In this embodiment, preferably, the mounting plate 9 is provided with a vertical through mounting hole, a bushing 13 is inserted into the mounting hole, and the guide rod 4 is located inside the bushing 13 and is slidably connected to the bushing 13.

[0043] The mounting hole is located on the mounting plate 9 and is vertically through-hole. The bushing 13 is matched with the mounting hole and inserted into it. The guide rod 4 is inserted into the bushing 13 and is vertically slidably connected to the bushing 13. The guide rod 4 cooperates with the mounting plate 9 through the bushing 13, which can improve the sliding performance and durability, making the positioning more accurate.

[0044] The above are merely preferred embodiments of the present utility model and are 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. An upper clamp assembly for a tube core leak detector, comprising an upper clamp with an opening facing downwards, and a lifting mechanism for driving the upper clamp to close onto the outside of the tube core, wherein the upper clamp has an inflation chamber for accommodating the tube core, and the inflation chamber is connected to an air source, characterized in that: A movable guide rod is provided between the upper clamp and the lifting mechanism. The guide rod passes through the lifting mechanism and is slidably connected to the lifting mechanism. The top and bottom of the guide rod are respectively in contact with the upper and lower sides of the lifting mechanism. A spring is sleeved on the outside of the guide rod. The upper clamp is hung on the lifting mechanism through the guide rod.

2. The upper clamp assembly of a core leak detector according to claim 1, characterized in that: The top of the inflation chamber is provided with a through air inlet, which is positioned relative to the top of the upper clamp. One end of the air inlet is connected to the inflation chamber, and the other end is connected to the air source.

3. The upper clamp assembly of a core leak detector according to claim 2, characterized in that: The air inlet has an L-shaped structure, including a vertical hole opening upward from the top of the inflation chamber and a horizontal hole opening inward from the side wall of the upper clamp, with the horizontal hole and the vertical hole connected together.

4. The upper clamp assembly of a core leak detector according to claim 2, characterized in that: The top of the guide rod is provided with a vertically penetrating air inlet, and the top of the upper clamp is provided with a through hole corresponding to the air inlet. One end of the air inlet is connected to the inflation chamber through the through hole, and the other end of the air inlet is connected to the air source.

5. The upper clamp assembly of a core leak detector according to claim 4, characterized in that: The upper clamp is provided with a limiting groove at the top for the guide rod to be fitted, and the limiting groove is axially aligned with the guide rod, the air supply hole, and the through hole.

6. The upper clamp assembly of a core leak detector according to claim 1, characterized in that: The lifting mechanism includes a horizontally mounted mounting plate and a lifting cylinder that drives the mounting plate to move vertically up and down, with a guide rod passing through the mounting plate.

7. The upper clamp assembly of a core leak detector according to claim 6, characterized in that: The top of the guide rod is fitted with a limiting ring, which movably abuts against the upper side of the mounting plate. The bottom of the guide rod is provided with a stroke block connected to the upper clamp, which movably abuts against the lower side of the mounting plate.

8. The upper clamp assembly of a core leak detector according to claim 7, characterized in that: The mounting plate has a vertical through mounting hole, a bushing is inserted into the mounting hole, and a guide rod is located inside the bushing and is slidably connected to the bushing.

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