Butt joint assembly for flange leak detection

Abstract

The utility model relates to the technical field of butt-joint assemblies for flange leak detection, and discloses a butt-joint assembly for flange leak detection, which comprises a butt-joint device, a sealing ring is arranged at the top of the butt-joint device, and a connecting piece is fixedly connected to the bottom of the butt-joint device. The docking port can be directly docked with a phi interface of the helium mass spectrometer leak detector, the micro motor drives the screw rod to rotate and drives the moving block and the connecting arm to move during docking, so that the pressure plate applies pressure to the docking port and is matched with the sealing gasket to form reliable sealing, bolts do not need to be screwed manually, an operator does not need professional skills, use is convenient, and meanwhile the docking port is convenient to operate. The butt joint device, the connecting piece and the butt joint port form a through internal passage, the helium mass spectrometer leak detector can directly act on a flange sealing area where a top sealing ring is located, transition of a metal hose is not needed, and due to the fact that the passage is reliable in sealing and small in resistance, the pumping force of the leak detector can meet the vacuum degree requirement, and an extra butt joint dry pump is not needed.

Description

Technical Field

[0001] This utility model relates to the technical field of flange leak detection docking components, and in particular to a flange leak detection docking component. Background Technology

[0002] A flange leak detection docking assembly is a specialized component used in flange leak detection operations to achieve a quick and sealed connection between the testing equipment (such as a helium mass spectrometer leak detector, vacuum leak detector, etc.) and the flange to be tested. It is the core connection structure in the flange leak detection system. Its core function is to establish a reliable passage between the "sealed cavity of the flange to be tested" and the "leak detection equipment" to ensure the sealing and stability of the leak detection process.

[0003] Existing flange leak detection docking assemblies may not be able to directly interface with helium mass spectrometer leak detectors, requiring connection via transition components such as metal hoses. This multi-link connection increases the number of sealing points, and the hoses themselves may leak due to aging or loosening of the interfaces, making it difficult to maintain the vacuum level during leak detection and affecting the accuracy of leak detection, especially for scenarios such as KM3 flanges that require a strict vacuum environment. Therefore, we propose a flange leak detection docking assembly. Utility Model Content

[0004] The purpose of this invention is to provide a flange leak detection docking assembly to solve the problem mentioned in the background art that it may not be possible to directly dock with the interface of a helium mass spectrometer leak detector, and it is necessary to connect through transition components such as metal hoses. This multi-link connection increases the number of sealing points, and the hose itself may leak due to aging or loosening of the interface, making it difficult to maintain the vacuum level during leak detection and affecting the leak detection accuracy, especially for scenarios such as KM flanges that require a strict vacuum environment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flange leak detection docking assembly, including a docking device, a sealing ring provided at the top of the docking device, a connector fixedly connected to the bottom of the docking device, a mating interface provided at the bottom of the connector, an automatic docking sealing assembly provided outside the mating interface, the automatic docking sealing assembly including a sealing gasket and a sliding rod, a micro motor connected to the connector via a fixing frame, a moving block connected to the micro motor via a lead screw, and a pressure plate connected to the moving block via a connecting arm.

[0006] As a preferred embodiment, the sealing gasket is disposed at the bottom of the interface, the fixing bracket is fixedly connected to the outer wall of the connector and located above the interface, and the micro motor is fixedly installed on the top left side of the fixing bracket.

[0007] As a preferred embodiment, the upper end of the lead screw is fixedly connected to the output end of the micro motor, the lower end of the lead screw is rotatably connected to the bottom left side of the fixing frame, and the upper outer wall of the lead screw is rotatably connected to the inner left top wall of the fixing frame.

[0008] As a preferred embodiment, the movable block and the connecting arm are provided in two sets. One set of the movable block has its inner wall threadedly connected to the outer wall of the lead screw, and the other set of the movable block has its inner wall slidably connected to the outer wall of the slide rod.

[0009] As a preferred embodiment, one end of each of the two sets of connecting arms is fixedly connected to the surface of the two sets of moving blocks, and the other end of each of the two sets of connecting arms is fixedly connected to the outer walls of both sides of the pressure plate. The slide rod is fixedly connected to the upper and lower inner walls of the right side of the fixed frame, and the inner top wall of the pressure plate is in contact with the top of the interface.

[0010] As a preferred embodiment, the connector is provided with an adjustment component on its exterior. The adjustment component includes a limiting block, the inner wall of which is fixedly connected to the outer wall of the connector. The limiting block is located below the docking device and above the fixing frame.

[0011] As a preferred embodiment, the outer wall of the connector is provided with external threads, and the top center of the fixing frame is provided with a threaded groove.

[0012] As a preferred embodiment, the inner wall of the threaded groove is threadedly connected to the external thread, and two sets of magnetic blocks are provided in the middle of the top of the fixing frame, and the two sets of magnetic blocks are magnetically connected to the bottom of the limiting block.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. Through the set automatic docking sealing component, the interface can be directly docked with the φ interface of the helium mass spectrometer leak detector. During docking, the micro motor drives the lead screw to rotate, which moves the moving block and connecting arm, so that the pressure plate applies pressure to the interface and forms a reliable seal with the sealing gasket. There is no need to manually tighten the bolts. No professional skills are required for the operator. It is easy to use. At the same time, the docking device, the connecting parts and the interface form a through internal passage. The function of the helium mass spectrometer leak detector can be directly applied to the flange sealing area where the top sealing ring is located. There is no need for metal hose transition. Because the passage is reliably sealed and has low resistance, the pumping force of the leak detector itself can meet the vacuum requirements. There is no need for an additional docking dry pump.

[0015] 2. Through the set adjustment component, the external thread on the outer wall of the connector is threadedly connected to the threaded groove of the fixing frame. The position can be adjusted along the axial direction of the connector by rotating the fixing frame, so that the pressure plate and sealing gasket of the automatic docking sealing component can be accurately matched with the docking depth of the φ interface of the helium mass spectrometer leak detector. This avoids uneven sealing pressure caused by processing or assembly errors. The limit block can limit the maximum adjustment height of the fixing frame, preventing excessive adjustment from affecting the docking stability of the interface and the leak detector, further ensuring reliable sealing, and ensuring that the component can stably achieve direct docking with the helium mass spectrometer leak detector. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 for Figure 2 Partial structural diagram;

[0019] Figure 4 This is a schematic diagram of the automatic docking and sealing assembly of this utility model;

[0020] Figure 5 for Figure 4 Partial structural diagram;

[0021] Figure 6 for Figure 2 A partial breakdown diagram.

[0022] In the diagram: 1. Docking device; 2. Sealing ring; 3. Connector; 4. Docking interface; 5. Automatic docking sealing assembly; 501. Sealing gasket; 502. Fixing frame; 503. Micro motor; 504. Lead screw; 505. Moving block; 506. Connecting arm; 507. Pressure plate; 508. Slide rod; 6. Adjusting assembly; 601. Limiting block; 602. External thread; 603. Threaded groove; 604. Magnetic block. 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] Please see the appendix Figure 1 Appendix Figure 2 and appendix Figure 4 - Appendix Figure 6A flange leak detection docking assembly includes a docking device 1, a sealing ring 2 on the top of the docking device 1, a connector 3 fixedly connected to the bottom of the docking device 1, a mating interface 4 on the bottom of the connector 3, an automatic docking sealing assembly 5 on the outside of the mating interface 4, the automatic docking sealing assembly 5 including a sealing gasket 501 and a sliding rod 508, a micro motor 503 connected to the connector 3 via a fixing frame 502, a moving block 505 connected to the micro motor 503 via a lead screw 504, a pressure plate 507 connected to the moving block 505 via a connecting arm 506, a sealing gasket 501 located at the bottom of the mating interface 4, a fixing frame 502 fixedly connected to the outer wall of the connector 3 and located above the mating interface 4, and a micro motor 503 fixedly installed on the top left side of the fixing frame 502.

[0025] Interface 4 is the direct docking component between the bottom of the assembly and the φ25 interface of the helium mass spectrometer leak detector. Its size is adapted to the φ25 interface of the leak detector, serving as the physical carrier for direct docking. The internal channel of interface 4 connects connector 3 and the leak detector, allowing the vacuuming and leak detection gas of the leak detector to directly act on the sealing area of ​​the top flange. The sealing gasket 501 is located at the bottom of interface 4 and fits against the end face of the helium mass spectrometer leak detector interface. It achieves a seal between interface 4 and the leak detector through compression, thereby replacing the traditional bolt tightening sealing method and ensuring no gas leakage at the docking point. The sealing gasket 501 is made of vacuum-resistant silicone rubber, which deforms elastically under pressure to fill the gap between the docking surfaces.

[0026] The upper end of the lead screw 504 is fixedly connected to the output end of the micro motor 503, the lower end of the lead screw 504 is rotatably connected to the bottom left side of the fixed frame 502, and the upper outer wall of the lead screw 504 is rotatably connected to the inner wall of the top left side of the fixed frame 502. The moving block 505 and the connecting arm 506 are provided in two sets. The inner wall of one set of moving blocks 505 is threadedly connected to the outer wall of the lead screw 504, and the inner wall of the other set of moving blocks 505 is slidably connected to the outer wall of the slide rod 508.

[0027] The micro motor 503, lead screw 504, slide bar 508 and other components are integrated into the outer wall of the connector 3 through the fixing bracket 502. All components are arranged around the core docking function, with no redundant structure and a compact overall size, which meets the requirements of KM3 flange leak detection.

[0028] One end of each of the two sets of connecting arms 506 is fixedly connected to the surface of the two sets of moving blocks 505, and the other end of each of the two sets of connecting arms 506 is fixedly connected to the outer walls of the two sides of the pressure plate 507. The slide rod 508 is fixedly connected to the upper and lower inner walls of the right side of the fixed frame 502. The inner top wall of the pressure plate 507 is in contact with the top of the interface 4.

[0029] Driven by the connecting arm 506, the pressure plate 507 applies downward pressure to the mating point between the interface 4 and the leak detector interface, thereby squeezing the sealing gasket 501 to make it fit tightly and complete the seal, thus replacing manual tightening.

[0030] Specifically, through the automatic docking sealing assembly 5, the interface 4 can be directly docked with the φ25 interface of the helium mass spectrometer leak detector. During docking, the micro motor 503 drives the lead screw 504 to rotate, which in turn moves the moving block 505 and the connecting arm 506, causing the pressure plate 507 to apply pressure to the interface 4, forming a seal with the sealing gasket 501. This process does not require manual tightening of bolts, and operators do not need professional skills to operate it. At the same time, the docking device 1, the connecting piece 3 and the interface 4 form a through internal passage, and the function of the helium mass spectrometer leak detector can be directly applied to the flange sealing area where the top sealing ring 2 is located, without the need for a metal hose transition. Because the passage is reliably sealed and has low resistance, the leak detector's own pumping force can meet the vacuum requirements, and there is no need for an additional docking dry pump.

[0031] Please see the appendix Figure 1 - Appendix Figure 4 An adjustment component 6 is provided on the outside of the connector 3. The adjustment component 6 includes a limiting block 601. The inner wall of the limiting block 601 is fixedly connected to the outer wall of the connector 3. The limiting block 601 is located below the docking device 1 and above the fixing frame 502. An external thread 602 is provided on the outer wall of the connector 3. A threaded groove 603 is provided in the middle of the top of the fixing frame 502. The inner wall of the threaded groove 603 is threadedly connected to the external thread 602. Two sets of magnetic blocks 604 are provided in the middle of the top of the fixing frame 502. The two sets of magnetic blocks 604 are magnetically connected to the bottom of the limiting block 601.

[0032] The limiting block 601 physically limits the highest installation position of the fixing frame 502. When the fixing frame 502 is adjusted upward along the connecting member 3, the top will be blocked by the limiting block 601. The limiting block 601 is fixed to the outer wall of the connecting member 3, does not occupy the internal passage space, meets the requirement of small size, and provides a clear installation benchmark for the fixing frame 502.

[0033] Specifically, through the adjustment component 6, the external thread 602 on the outer wall of the connector 3 is threadedly connected to the threaded groove 603 of the fixing frame 502. The rotating fixing frame 502 can adjust its position along the axial direction of the connector 3, so that the pressure plate 507 and sealing gasket 501 of the automatic docking sealing component 5 are adapted to the docking depth of the φ25 interface of the helium mass spectrometer leak detector, avoiding uneven sealing pressure due to processing or assembly errors. The limit block 601 can limit the maximum adjustment height of the fixing frame 502, preventing excessive adjustment from affecting the docking stability of the interface 4 and the leak detector, ensuring reliable sealing, and ensuring that the component can stably achieve direct docking with the helium mass spectrometer leak detector.

[0034] Working principle of this utility model: This utility model is a flange leak detection docking assembly. First, the operator places the flange to be tested on top of the docking device 1, so that the flange sealing surface fits with the sealing ring 2 on the top of the docking device 1. Then, the docking interface 4 at the bottom of the assembly is aligned with the φ25 interface of the helium mass spectrometer leak detector to complete the initial docking positioning. If it is necessary to adjust the position of the automatic docking sealing assembly 5 to match the depth of the leak detector interface, the operator can rotate the fixing frame 502. By utilizing the thread engagement between the external thread 602 on the outer wall of the connector 3 and the threaded groove 603 of the fixing frame 502, the fixing frame 502 moves axially along the connector 3 until the docking depth of the pressure plate 507, the sealing gasket 501 and the leak detector interface are matched. During the adjustment process, the limit block 601 will prevent the fixing frame 502 from moving excessively upward to ensure adjustment safety. Then, the operator starts the micro motor 503, which drives the lead screw 504 to rotate, driving a set of moving... The moving block 505 moves axially along the lead screw 504, while another set of moving blocks 505 slides synchronously along the slide rod 508. The moving blocks 505 drive the pressure plate 507 to move downward through the connecting arm 506. The pressure plate 507 applies pressure to the interface 4, causing the sealing gasket 501 at the bottom of the interface 4 to be squeezed between the interface 4 and the leak detector interface end face, thus completing the seal. After the seal is completed, the helium mass spectrometer leak detector starts the vacuum pumping and leak detection functions. Through the through internal passage formed by the docking device 1, the connecting piece 3 and the interface 4, it directly acts on the flange sealing area where the top sealing ring 2 is located. Because the passage seal is reliable and the resistance is low, the leak detector's own pumping force can meet the vacuum requirements, without the need for additional docking dry pumps and metal hoses. After the leak detection is completed, the micro motor 503 rotates in reverse, driving the pressure plate 507 to reset and releasing the pressure on the interface 4. The operator then separates the interface 4 from the helium mass spectrometer leak detector interface and removes the flange that has been tested.

[0035] Finally, it should be noted that 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. A flange leak detection mating assembly, comprising a mating device (1), wherein a sealing ring (2) is provided on the top of the mating device (1), a connector (3) is fixedly connected to the bottom of the mating device (1), and a mating interface (4) is provided on the bottom of the connector (3), characterized in that: An automatic docking sealing assembly (5) is provided on the outside of the interface (4). The automatic docking sealing assembly (5) includes a sealing gasket (501) and a slide rod (508). The connector (3) is connected to a micro motor (503) through a fixing frame (502). The micro motor (503) is connected to a moving block (505) through a lead screw (504). The moving block (505) is connected to a pressure plate (507) through a connecting arm (506).

2. The flange leak detection assembly according to claim 1, characterized in that: The sealing gasket (501) is disposed at the bottom of the interface (4), the fixing bracket (502) is fixedly connected to the outer wall of the connector (3) and located above the interface (4), and the micro motor (503) is fixedly installed on the top left side of the fixing bracket (502).

3. The flange leak detection assembly according to claim 2, characterized in that: The upper end of the lead screw (504) is fixedly connected to the output end of the micro motor (503), the lower end of the lead screw (504) is rotatably connected to the bottom left side of the fixing frame (502), and the upper outer wall of the lead screw (504) is rotatably connected to the inner left top side of the fixing frame (502).

4. A flange leak detection assembly according to claim 3, characterized in that: The movable block (505) and the connecting arm (506) are provided in two sets. The inner wall of one set of the movable block (505) is threadedly connected to the outer wall of the lead screw (504), and the inner wall of the other set of the movable block (505) is slidably connected to the outer wall of the slide rod (508).

5. A flange leak detection assembly according to claim 4, characterized in that: One end of each of the two sets of connecting arms (506) is fixedly connected to the surface of the two sets of moving blocks (505), and the other end of each of the two sets of connecting arms (506) is fixedly connected to the outer walls of the two sides of the pressure plate (507). The slide rod (508) is fixedly connected to the upper and lower inner walls of the right side of the fixing frame (502). The inner top wall of the pressure plate (507) is in contact with the top of the interface (4).

6. A flange leak detection assembly according to any one of claims 1-5, characterized in that: An adjustment component (6) is provided on the outside of the connector (3). The adjustment component (6) includes a limiting block (601). The inner wall of the limiting block (601) is fixedly connected to the outer wall of the connector (3). The limiting block (601) is located below the docking device (1) and above the fixing frame (502).

7. A flange leak detection assembly according to claim 6, characterized in that: The outer wall of the connector (3) is provided with an external thread (602), and the top center of the fixing bracket (502) is provided with a threaded groove (603).

8. A flange leak detection assembly according to claim 7, characterized in that: The inner wall of the threaded groove (603) is threadedly connected to the external thread (602). Two sets of magnetic blocks (604) are provided in the middle of the top of the fixing frame (502). The two sets of magnetic blocks (604) are magnetically connected to the bottom of the limiting block (601).

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