Airtightness detection tool for outer circular hole of annular metal piece

Abstract

An air tightness detection tool for an outer circular hole of an annular metal piece comprises a circular ring clamp, an air guide connector and an air guide three-way pipe. Wherein the circular ring clamp is an open circular ring, and connecting lugs protruding in the radial direction are arranged on ring bodies at the two ends of the opening; a mounting frame protruding in the radial direction is arranged on the circumference of the circular ring clamp; the position of the mounting bracket is symmetrical to the position of the connecting lug, and the air guide three-way pipe is mounted on the mounting bracket through an air guide joint. The air guide joint is mounted on the mounting frame; and the barometer is arranged on the barometer joint connecting end of the air guide three-way pipe. By changing the diameter of the circular ring clamp, airtightness detection is carried out on the outer circular hole of the annular metal piece with the diameter range of phi 100-phi 2000 mm, use is convenient, fast and efficient, the structure is stable, the pressure bearing performance is good, and 0.2-2 MPa air pressure detection can be carried out on the outer circular hole of the annular metal piece according to the airtightness detection requirement.

Description

Technical Field

[0001] This invention relates to the field of airtightness technology, specifically to an airtightness testing fixture for the outer circular hole of a ring-shaped metal part. Background Technology

[0002] Due to technical requirements, some annular metal parts need to have vent holes machined on their outer circumference. Because of the special shape of these vent holes, a hole must first be drilled at the end face to connect with the outer circular hole. Then, the end face is plugged with welding. The resulting hole is called a vent hole. To verify that the vent hole has good airtightness after plugging and will not leak air, an airtightness test is required.

[0003] Xinxing Heavy Industry Hubei 3611 Machinery Co., Ltd. proposed an airtightness testing device for through-holes in its invention publication CN113932978A. This device, through the combined use of a connector and an air inlet, enables airtightness testing of through-holes in parts. However, this device can only perform airtightness testing on end-face through-holes and cannot perform airtightness testing on external circular holes and blind holes.

[0004] Baoji Fast Gear Co., Ltd. disclosed a threaded blind hole airtightness testing device in its utility model patent with announcement number CN219657101U. This device can achieve airtightness testing of threaded blind holes through the combination of a hollow stud, a sealing head, and a connecting head; however, this device cannot achieve airtightness testing of outer circular open holes. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies that cannot detect the airtightness of the outer circular hole of a workpiece, this invention proposes an airtightness testing fixture for the outer circular hole of an annular metal part.

[0006] This invention includes a circular clamp, an air guide connector, and an air guide tee. The circular clamp is an open ring with radially protruding connecting lugs at both ends of the ring body. A radially protruding mounting bracket is located on the circumference of the circular clamp, and the position of the mounting bracket is symmetrical to the position of the connecting lugs. The air guide tee is mounted on the mounting bracket via the air guide connector. The air guide connector is mounted on the mounting bracket; a pressure gauge is mounted on the pressure gauge connector end of the air guide tee.

[0007] The mounting bracket is U-shaped; the air guide tee is located on the outer surface of the mounting bracket, so that the air guide connector is located on the inner surface of the mounting bracket.

[0008] Of the three connecting pipes in the air guide tee, one connecting pipe has an internally threaded pressure gauge connector end, one has an internally threaded air guide connector end, and the third has a semi-circular air pump connector end.

[0009] The outer circumferential surface of the air vent is threaded, and there is a through air vent hole at its center. The end face of the nut at the inner end of the air vent has an axial annular sealing groove.

[0010] When using this invention, the annular clamp is placed on the air vent of the annular metal part where air tightness testing is required. Bolts and nuts are used to tighten the annular clamp plate, ensuring the inner circle of the clamp fits snugly against the outer circle of the annular metal part, thus mounting the clamp onto the part. The air vent connector has a through hole drilled in the middle and a sealing groove on its end face for installing an O-ring seal, providing a seal when airtight. The end face of the air vent connector is arc-shaped, matching the outer diameter of the annular metal part, allowing it to fit snugly against the outer circle during air tightness testing. The arc-shaped end face of the air vent connector has straight sections on both sides, facilitating clamping and use during air tightness testing. The other end of the air vent connector has an external thread for connecting to an air vent tee. The air vent tee has three connectors: two with threaded holes for connecting to the air vent connector and a pressure gauge respectively, and the third with an external thread for connecting to an air pump. The air vent tee has an internal air vent. By using a combination of ring clamps, air guide connectors, air guide tees, bolts, and nuts, the air tightness test of the outer circumference air guide hole of annular metal parts can be completed more conveniently, quickly, and efficiently.

[0011] This invention provides a method for airtight testing of the outer circular hole of an annular metal part using an airtight combination tooling, which can effectively solve the problem of airtight testing of the outer circular hole of an annular metal part. Compared with the prior art, the advantages of this invention are:

[0012] 1. When performing airtightness testing on the outer circular hole, it is only necessary to assemble a simple airtightness fixture to quickly and efficiently achieve airtightness testing on the outer circular air guide hole of the annular metal part. This invention is efficient, convenient, and easy to use.

[0013] 2. This invention can perform airtightness testing on the outer circular hole of annular metal parts with a diameter range of Ф100-Ф2000mm by changing the diameter of the annular clamp. Furthermore, for annular clamps with a diameter of ФD, airtightness testing can be performed on annular metal parts with a diameter of ФD±100mm by adjusting the nuts connecting the two iron plates of the annular clamp.

[0014] 3. The present invention has a stable structure and good pressure resistance, and can perform air pressure testing of 0.2-2MPa on the outer circular hole of the annular metal part according to the air tightness testing requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the interaction between the present invention and the annular metal part.

[0016] Figure 2 This is a structural diagram of the present invention.

[0017] Figure 3 for Figure 2 Sectional view along the AA direction.

[0018] Figure 4 This is a schematic diagram of a circular clamp.

[0019] Figure 5 This is a schematic diagram of the air guide connector.

[0020] Figure 6 yes Figure 5 Axonometric drawing.

[0021] Figure 7 This is a schematic diagram of a tee pipe.

[0022] Figure 8 This is a schematic diagram of the hole being inspected.

[0023] In the diagram: 1. Air duct tee; 2. Air duct connector; 3. Circular clamp; 4. Circular metal part; 5. Bolt; 6. External hexagonal nut; 7. External hexagonal nut; 8. Air duct hole of the circular metal part; 9. Air duct connector sealing groove; 10. Air duct connector vent hole; 11. Pressure gauge connector connection end; 12. Air duct connector connection end; 13. Air pump connector connection end; 14. Welding wire plugging area. Detailed Implementation

[0024] This embodiment is a combined tooling for testing the airtightness of the outer circular air vent of an annular metal part, including an annular clamp 3; an air vent connector 2; and an air vent tee 1. The annular clamp is an open annular ring with radially protruding connecting lugs at both ends of the ring body at the opening. A radially protruding mounting bracket is located on the circumference of the annular clamp; this mounting bracket is U-shaped, and the air vent tee is mounted on the mounting bracket of the annular clamp via the air vent connector, with the air vent tee positioned on the outer surface of the mounting bracket; the air vent connector is positioned on the inner surface of the mounting bracket. The position of the mounting bracket is symmetrical to the position of the connecting lugs. The air vent connector is mounted on the mounting bracket via an external hexagonal nut 7; one connecting pipe of the air vent tee is threaded onto the outer end of the air vent connector. A pressure gauge is mounted on the pressure gauge connector connection end 11 of the air vent tee.

[0025] Of the three connecting pipes in the air guide tee 1, one connecting pipe has an internally threaded pressure gauge connector connection end 11, one has an internally threaded air guide connector connection end 12, and the third has a semi-circular air pump connector connection end.

[0026] The outer circumferential surface of the air guide connector 2 is threaded, and its center has a through air guide connector vent hole 10. The inner end of the air guide connector has a nut for easy operation; the end face of the nut has an axial annular groove, which is the air guide connector sealing groove 9.

[0027] During assembly, install the external hexagonal nut 7 onto the air guide connector 2; place the external hexagonal nut 7 into the U-shaped protrusion of the ring clamp 3, and place the sealing ring into the sealing groove 9 on the end face of the air guide connector 2. Fit the ring clamp 3 onto the air guide hole 8 of the annular metal part 4 where air tightness testing is required, and tighten the bolts 5 and external hexagonal nut 6 at the ring clamp 3 to secure the ring clamp 3 onto the annular metal part 4. Align the air vent 10 on the end face of the air guide connector 2 with the air guide hole 8 of the annular metal part, and tighten the external hexagonal nut 7 to secure the end face of the air guide connector tightly against the outer circumference of the annular metal part 4. Connect the other end of the air guide connector 2 to the air guide connector connection end 12 of the tee pipe 1. Connect the pressure gauge connector 11 of the tee pipe 1 to the pressure gauge, and connect the air pump connector 13 to the air pump.

[0028] In use, clean the outer circumference of the air vent on the annular metal 4 that needs to be tested for air tightness. Screw the external hex nut 7 onto the air vent connector 2, pass the air vent connector 2 through the U-shaped part of the annular clamp 3, and place the O-ring seal into the sealing groove 9 on the end face of the air vent connector 2. Assemble the annular clamp 3 onto the outer circumference of the air vent to be tested, ensuring that the vent hole 10 of the air vent connector 2 corresponds to the position of the air vent hole 8 on the outer circumference of the annular metal part 4, and secure it with bolts 5 and external hex nut 6 to fix the annular clamp 3 onto the outer circumference of the annular metal part 4. Tighten the external hex nut 7 of the air vent connector 2 so that the end face of the air vent connector 2 is in tight contact with the outer circumference of the annular metal part 4. Insert the O-ring seal into the air vent connector connection end 12 of the air vent tee 1 and connect it to the air vent connector 2. The air tightness assembly tooling is now complete.

Claims

1. A gas tightness detection tool for an outer circle hole of a ring-shaped metal piece, characterized by, The utility model relates to a kind of air guide three-way pipes, including circular ring clamp (3), air guide connector (2) and air guide three-way pipe (1);Wherein, the circular ring clamp is open circular ring, and there are radial protruding connecting ear pieces on the ring body of both ends at the opening;There are radial protruding mounting racks on the circumference of the circular ring clamp;And the position of the mounting rack is symmetrical with the position of the connecting ear piece, the air guide three-way pipe is installed on the mounting rack by air guide connector;The air guide connector is installed on the mounting rack;Air pressure gauge is installed on the air pressure gauge connector connection end (11) of the air guide three-way pipe.

2. The ring-shaped metal member outer circle hole air tightness detection tool of claim 1, wherein, The mounting rack is in the shape of a Chinese character door;The air guide three-way pipe is located on the outer surface of the mounting rack, so that the air guide connector is located on the inner surface of the mounting rack.

3. The ring-shaped metal member outer circle hole air tightness detection tool of claim 1, wherein, Among the three connecting pipes of the air guide three-way pipe (1), the pipe head of one connecting pipe is the air pressure gauge connector connection end (11) with internal thread, one is the air guide connector connection end (12) with internal thread, and the third is the air pump connector connection end with semicircular arc shape.

4. The ring-shaped metal member outer circle hole air tightness detection tool of claim 1, wherein, The outer circumferential surface of the air guide connector (2) is threaded surface, and the center has through air guide connector air hole (10);The end face of nut at the inner end head of the air guide connector has axial annular air guide connector sealing groove (9).

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