Helium filling hose in box

Abstract

The utility model relates to the technical field of vacuum box helium leak detection, in particular to a helium filling hose in a box, which comprises a sealing seat, an inner pipe and an outer pipe sleeved outside the inner pipe, a pipe penetrating cavity is arranged in the sealing seat, and one end of the inner pipe penetrates through the pipe penetrating cavity and then is communicated with a box external thread connector. The outer wall of the end, close to the box external thread connector, of the inner pipe and the inner wall of the pipe penetrating cavity are sealed. The end, close to the box external thread connector, of the outer pipe communicates with the end, away from the box external thread connector, of the pipe penetrating cavity. The end, away from the sealing seat, of the inner pipe is sleeved with a middle connector, the end, penetrating through an inner hole of the middle connector, of the inner pipe is communicated with an in-box threaded connector, the outer wall of the end, penetrating through the inner hole of the middle connector, of the inner pipe and the middle connector are arranged in a sealed mode, and the end, away from the in-box threaded connector, of the middle connector and the outer pipe are arranged in a sealed mode. The sealing seat is provided with an evacuating cavity communicated with the pipe penetrating cavity, and an evacuating connector is arranged at the outer end of the evacuating cavity. According to the utility model, the situation that helium leaks into the vacuum box from the helium filling pipeline can be reduced, and the detection accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of helium leak detection in a vacuum box, in particular to a helium-filled hose in a box. Background Art

[0002] The vacuum box helium leak detection equipment is a device used to detect helium. The basic principle of helium leak detection is to use helium as a tracer gas, fill helium into the workpiece in the vacuum box, and then use the helium leak detector to quickly and accurately determine the leakage of the workpiece.

[0003] When using the vacuum box helium leak detection equipment, the operator first places the workpiece in the vacuum box and connects the workpiece interface to the quick connector in the vacuum box. After the vacuum box door is closed, the system can automatically complete the entire process of large leak detection, workpiece strength detection, evacuation, helium filling, leak detection, and recycling, with fast production cycle and high leak detection accuracy.

[0004] The helium-filled hose in the box is used as a link to fill helium into the workpiece. Since one end of the hose needs to be set in the vacuum box, the helium leakage rate is very high. Helium molecules have penetrability to rubber hoses. After a period of time, some helium molecules pass through the rubber hose and reach the vacuum box. At this time, the equipment cannot use the leak detector to determine whether the detected helium molecules are leaking from the workpiece or from the rubber hose, which causes the equipment to misdetect. Utility Model Content

[0005] The utility model aims to provide a helium-filled hose in a box, so as to solve the problem that the helium-filled hose of a vacuum box helium leak detection device leaks and thus causes misdetection of the device.

[0006] The utility model is realized by the following technical solutions:

[0007] The closure of the present invention is provided with a sealing member, wherein the sealing member is provided with a sealing member, wherein the sealing member has a plurality of inner tubes and an outer tube, wherein the plurality of inner tubes are provided with a plurality of outer tubes, and the plurality of outer tubes are provided with a plurality of outer tubes.

[0008] Furthermore, one end of the external threaded joint is provided with an external thread, and the other end is connected to be provided with a plug joint, the end of the inner tube close to the external threaded joint is sleeved with a resin bushing, one end of the resin bushing extends into the tube-penetrating cavity, and the other end is located outside the tube-penetrating cavity and is provided with an annular protrusion along the circumference of the outer wall, and the plug joint is plugged into the inner tube and extends into the tube-penetrating cavity; the tube-penetrating cavity of the sealing seat close to the external threaded joint is a cylindrical structure at one end, and the outer wall of the cylindrical structure is provided with an external thread, and a protruding abutting portion is also provided on the external threaded joint, and a clamping nut is sleeved on the outside of the external threaded joint, one end of the clamping nut is threadedly connected to the cylindrical structure, and the other end is provided with an abutting ring plate, the abutting portion is located inside the clamping nut, the abutting ring plate is tightly abutted against the abutting portion, and the abutting portion and the end face of the cylindrical structure clamp the resin bushing.

[0009] Furthermore, the structure of the inner threaded joint of the box is the same as that of the inner threaded joint of the box, both ends of the intermediate joint are provided with external threads, the inner tube and the intermediate joint are sealed and connected by the resin bushing, and the outer threaded joint of the box is compressed and connected with one end of the intermediate joint by the clamping nut.

[0010] Furthermore, a cylindrical groove is provided on an end face of the intermediate joint away from the threaded joint in the box, a resin bushing and a clamping nut are sleeved on the end of the outer tube close to the intermediate joint, and the end of the outer tube close to the intermediate joint is located in the groove, the clamping nut is threadedly connected to the intermediate joint, and the clamping nut presses the annular protrusion of the resin bushing against the end face of the intermediate joint.

[0011] Furthermore, one end of the through-tube cavity of the sealing seat close to the threaded joint in the box is a cylindrical structure, the outer wall of the cylindrical structure close to the threaded joint in the box is provided with an external thread, and the end face of the cylindrical structure close to the threaded joint in the box is provided with a cylindrical depression, one end of the outer tube close to the sealing seat is provided with a resin bushing and a clamping nut, and the end of the outer tube close to the sealing seat is located in the depression, and the outer tube and the cylindrical structure are sealed and connected via the resin bushing and the clamping nut.

[0012] Furthermore, the outer threaded joint of the box is threadedly connected with a female quick-connect joint, and the female quick-connect joint is used to connect with a workpiece sealing male joint.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] In the utility model, the sealing seat is sealed and installed on the box wall of the vacuum box through the sealing ring, so that the outer tube is located inside the vacuum box, and the outer threaded joint of the box is located outside the vacuum box, and one end of the inner tube extends to the inside of the vacuum box, the workpiece is placed in the vacuum box, the inner threaded joint of the box is connected to the pipeline of the workpiece, the helium filling device is connected through the outer threaded joint of the box, and then the vacuum pump device is connected through the evacuation joint, and then helium is filled into the inside of the workpiece through the inner tube, and the vacuum pump device is started at the same time, and a part of the helium in the inner tube passes through the inner tube into the middle layer between the inner tube and the outer tube, and the helium in the middle layer is pumped out to the outside of the vacuum box by the vacuum pump device, and the helium molecules will not penetrate the outer tube through the middle layer to reach the vacuum box, and because the vacuum degree of the outer tube is low inside and high outside, only the outside air continuously penetrates inward and is then pumped away by the vacuum pump. In this way, the leakage of helium from the helium filling hose itself in the box is reduced, and the signal-to-noise ratio and reliability of the detection of the equipment are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model.

[0016] In the attached picture:

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0018] Figure 2 For the utility model embodiment 1 Figure 1 Enlarged view of part A in the middle;

[0019] Figure 3 For the utility model embodiment 1 Figure 2 Enlarged view of part B in the middle.

[0020] Marks and corresponding parts names in the attached drawings:

[0021] 1. Sealing seat; 2. Inner tube; 3. Outer tube; 4. Pipe-through cavity; 5. Threaded joint outside the box; 6. Vacuum box; 7. Intermediate joint; 8. Threaded joint inside the box; 9. Vacuum cavity; 10. Vacuum joint; 11. Resin bushing; 12. Pressing nut; 13. Groove; 14. Depression; 15. Female quick-connect connector. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the embodiments and drawings. The schematic implementation mode and description of the utility model are only used to explain the utility model and are not intended to limit the utility model. It should be noted that the utility model is already in the actual development and use stage.

[0023] Example 1

[0024] A helium-filled hose in a box, referring to Figure 1 , Figure 2 , including a sealing seat 1, an inner tube 2 and an outer tube 3 sleeved on the outside of the inner tube 2, the inner tube 2 is longer than the outer tube 3, a gap is left between the inner tube 2 and the outer tube 3, a through-tube cavity 4 is opened in the sealing seat 1, one end of the inner tube 2 passes through the through-tube cavity 4 and is connected to a box external threaded joint 5, the outer wall of the end of the inner tube 2 close to the box external threaded joint 5 is sealed with the inner wall of the through-tube cavity 4, a gap is left between the inner tube 2 and the inner wall of the through-tube cavity 4 (wherein the outer wall of the end of the inner tube 2 located outside the vacuum box 6 is sealed with the inner wall of the through-tube cavity 4), one end of the outer tube 3 close to the box external threaded joint 5 is connected with the end of the through-tube cavity 4 away from the box external threaded joint 5; combined Figure 3 The end of the inner tube 2 away from the sealing seat 1 is sleeved with an intermediate joint 7, and the end of the inner tube 2 passing through the inner hole of the intermediate joint 7 is connected with a box inner threaded joint 8. The outer wall of the end of the inner tube 2 passing through the inner hole of the intermediate joint 7 is sealed with the intermediate joint 7, and the end of the intermediate joint 7 away from the box inner threaded joint 8 is sealed with the outer tube 3; helium is filled into the workpiece through the inner tube 2, and the vacuum pump equipment is started at the same time. A part of the helium in the inner tube 2 passes through the inner tube 2 and enters the middle layer between the inner tube 2 and the outer tube 3, and the helium in the middle layer is pumped out to the outside of the vacuum box 6 by the vacuum pump equipment. The helium molecules will not penetrate the outer tube 3 through the middle layer to reach the vacuum box 6, and because the vacuum degree of the outer tube 3 is low inside and high outside, only the air outside the outer tube 3 continuously penetrates inward and is then pumped away by the vacuum pump. In this way, the leakage of helium from the helium-filled hose in the box itself is reduced, ensuring the signal-to-noise ratio and reliability of the detection of the equipment.

[0025] More specifically, refer to Figure 1 , Figure 2 One end of the external threaded joint 5 of the box is provided with an external thread, and the other end is connected to be provided with a plug joint. The end of the inner tube 2 close to the external threaded joint 5 of the box is sleeved with a resin bushing 11, one end of the resin bushing 11 extends into the tube-penetrating cavity 4, and the other end is located outside the tube-penetrating cavity 4 and is provided with an annular protrusion along the circumference of the outer wall, and the plug joint is plugged into the inner tube 2 and extends into the tube-penetrating cavity 4; the tube-penetrating cavity 4 of the sealing seat 1 is a cylindrical structure at one end close to the external threaded joint 5 of the box, and the outer wall of the cylindrical structure is provided with an external thread. A protruding abutting portion is also provided on the external threaded joint 5 of the box, and a clamping nut 12 is sleeved on the outside of the box external threaded joint 5, one end of the clamping nut 12 is threadedly connected to the cylindrical structure, and an abutting ring plate is provided at the other end, the abutting portion is located inside the clamping nut 12, the abutting ring plate is tightly abutted against the abutting portion, and the abutting portion and the end face of the cylindrical structure are clamped against the resin bushing 11. The end of the inner tube 2 located outside the vacuum box 6 and the inner wall of the tube cavity 4 of the sealing seat 1 can be well sealed by the compression nut 12 and the resin bushing 11 compression ring.

[0026] More specifically, refer to Figure 1 , Figure 3 The structure of the box internal threaded joint 8 is the same as that of the box internal threaded joint 8, both ends of the intermediate joint 7 are provided with external threads, the inner tube 2 and the intermediate joint 7 are sealed and connected through the resin bushing 11, and the box external threaded joint 5 and one end of the intermediate joint 7 are compressed and connected through the compression nut 12. The compression nut 12 and the resin bushing 11 pressure ring can better seal the end of the inner tube 2 located inside the vacuum box 6 and the inner hole wall of the intermediate joint 7.

[0027] More specifically, refer to Figure 1 , Figure 3 A cylindrical groove 13 is provided on the end surface of the intermediate joint 7 away from the threaded joint 8 in the box, and a resin bushing 11 and a clamping nut 12 are sleeved on the end of the outer tube 3 close to the intermediate joint 7, and the end of the outer tube 3 close to the intermediate joint 7 is located in the groove 13, and the clamping nut 12 is threadedly connected with the intermediate joint 7, and the clamping nut 12 presses the annular protrusion of the resin bushing 11 on the end surface of the intermediate joint 7. The outer tube 3 and the intermediate joint 7 can be better sealed and connected by the clamping nut 12 and the resin bushing 11 pressure ring.

[0028] More specifically, refer to Figure 1 , Figure 2 The end of the through-tube cavity 4 of the sealing seat 1 close to the threaded joint 8 in the box is a cylindrical structure, the outer wall of the cylindrical structure close to the threaded joint 8 in the box is provided with an external thread, and the end surface of the cylindrical structure close to the threaded joint 8 in the box is provided with a cylindrical recess 14, the end of the outer tube 3 close to the sealing seat 1 is sleeved with a resin bushing 11 and a clamping nut 12, the end of the outer tube 3 close to the sealing seat 1 is located in the recess 14, and the outer tube 3 and the cylindrical structure are sealed and connected by the resin bushing 11 and the clamping nut 12. The outer tube 3 and the sealing seat 1 can be better sealed and connected by the clamping nut 12 and the resin bushing 11 pressure ring.

[0029] More specifically, refer to Figure 1 , Figure 3 The outer threaded connector 5 of the box is threadedly connected with a quick-connect connector female head 15, and the quick-connect connector female head 15 is used to connect with the workpiece sealing male head. The helium-filled hose can be quickly connected to the workpiece through the quick-connect connector, so as to facilitate and quickly perform workpiece leakage detection.

[0030] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A helium-filled hose in a box, characterized in that: The invention comprises a sealing seat (1), an inner tube (2), and an outer tube (3) sleeved on the outer side of the inner tube (2); the inner tube (2) is longer than the outer tube (3); a gap is left between the inner tube (2) and the outer tube (3); a tube-penetrating cavity (4) is provided in the sealing seat (1); one end of the inner tube (2) passes through the tube-penetrating cavity (4) and is connected to an externally threaded joint (5); the outer wall of one end of the inner tube (2) close to the externally threaded joint (5) is sealed with the inner wall of the tube-penetrating cavity (4); a gap is left between the inner tube (2) and the inner wall of the tube-penetrating cavity (4); one end of the outer tube (3) close to the externally threaded joint (5) is sealed with the inner wall of the tube-penetrating cavity (4); The end of the tube cavity (4) away from the box external threaded joint (5) is connected; the end of the inner tube (2) away from the sealing seat (1) is sleeved with an intermediate joint (7); the end of the inner tube (2) passing through the inner hole of the intermediate joint (7) is connected with the box internal threaded joint (8); the outer wall of the end of the inner tube (2) passing through the inner hole of the intermediate joint (7) is sealed with the intermediate joint (7); the end of the intermediate joint (7) away from the box internal threaded joint (8) is sealed with the outer tube (3); the sealing seat (1) is provided with an evacuation cavity (9) connected with the tube cavity (4); the outer end of the evacuation cavity (9) is provided with an evacuation joint (10).

2. The helium-filled hose in a box according to claim 1, characterized in that: One end of the box external threaded joint (5) is provided with an external thread, and the other end is connected to a plug joint. The end of the inner tube (2) close to the box external threaded joint (5) is sleeved with a resin bushing (11). One end of the resin bushing (11) extends into the tube-penetrating cavity (4), and the other end is located outside the tube-penetrating cavity (4) and is provided with an annular protrusion along the circumference of the outer wall. The plug joint is plugged into the inner tube (2) and extends into the tube-penetrating cavity (4); the tube-penetrating cavity (4) of the sealing seat (1) is close to the box external threaded joint. One end of (5) is a cylindrical structure, the outer wall of the cylindrical structure is provided with an external thread, the box external threaded joint (5) is also provided with a protruding abutment portion, the box external threaded joint (5) is externally sleeved with a clamping nut (12), one end of the clamping nut (12) is threadedly connected to the cylindrical structure, and the other end is provided with an abutment ring plate, the abutment portion is located inside the clamping nut (12), the abutment ring plate is tightly abutted against the abutment portion, and the abutment portion and the end face of the cylindrical structure are clamped against the resin bushing (11).

3. The helium-filled hose in a box according to claim 2, characterized in that: The structure of the internal threaded joint (8) of the box is the same as that of the internal threaded joint (8), both ends of the intermediate joint (7) are provided with external threads, the inner tube (2) and the intermediate joint (7) are sealed and connected via the resin bushing (11), and the external threaded joint (5) of the box is compressed and connected with one end of the intermediate joint (7) via the clamping nut (12).

4. The helium-filled hose in a box according to claim 3, characterized in that: A cylindrical groove (13) is provided on one end face of the intermediate joint (7) away from the threaded joint (8) in the box, and a resin bushing (11) and a clamping nut (12) are sleeved on one end of the outer tube (3) close to the intermediate joint (7), and the end of the outer tube (3) close to the intermediate joint (7) is located in the groove (13), and the clamping nut (12) is threadedly connected to the intermediate joint (7), and the clamping nut (12) presses the annular protrusion of the resin bushing (11) onto the end face of the intermediate joint (7).

5. The helium-filled hose in a box according to claim 4, characterized in that: The end of the tube-penetrating cavity (4) of the sealing seat (1) close to the threaded joint (8) in the box is a cylindrical structure, the outer wall of the cylindrical structure close to the threaded joint (8) in the box is provided with an external thread, and the end surface of the cylindrical structure close to the threaded joint (8) in the box is provided with a cylindrical recess (14), the end of the outer tube (3) close to the sealing seat (1) is sleeved with a resin bushing (11) and a clamping nut (12), the end of the outer tube (3) close to the sealing seat (1) is located in the recess (14), and the outer tube (3) and the cylindrical structure are sealed and connected via the resin bushing (11) and the clamping nut (12).

6. The helium-filled hose in a box according to claim 5, characterized in that: The box external threaded joint (5) is threadedly connected with a quick-connect female joint (15), and the quick-connect female joint (15) is used for docking with a workpiece sealing male joint.

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