Leakage test plugging plug structure

Abstract

The invention discloses a leakage test plugging plug structure which is characterized by comprising a pan head bolt, the pan head bolt is sequentially sleeved with a first elastic compression piece, hard rubber, a metal piece, a second elastic compression piece and a first fixing piece, and a compression nut is arranged on the pan head bolt in a threaded fit mode. Wherein the lower end of the first elastic compression piece abuts against the pan head portion of the pan head bolt, the outer diameter of the first elastic compression piece, the outer diameter of the hard rubber and the outer diameter of the second elastic compression piece are equal in the natural state, and the outer diameter of the metal sheet is not larger than the outer diameter of the hard rubber. The hole plugging device has the beneficial effects that the structure is simple, the manufacturing cost is low, the plugging effect is good, plugging can be achieved under the condition that an external pressing device is not applied, and the hole plugging device is suitable for plugging various structural holes such as deep holes, thin-wall holes, chamfered holes and chamfered round holes.

Description

Technical Field

[0001] The invention relates to the field of plugs, and in particular to a leak testing and sealing plug structure. Background Art

[0002] In the production process of some products with airtight requirements, it is necessary to conduct airtightness testing after the product processing is completed. The plug in the existing detection fixture needs to be equipped with a clamping device to compress and seal it or to connect and seal it with the threaded hole through a threaded structure. It is suitable for holes with flat end faces to be blocked, or threaded holes, in which the sealing structure that requires a clamping device is relatively complex and cannot be used for underwater immersion leak detection; the plugging of the threaded connection structure is only suitable for the plugging of threaded holes and has a small practical range. In addition, conventional hard rubber plugs are prone to loosening and falling off during the circulation of products due to the lack of fixed points, causing foreign matter to enter the blocking area and contaminate the product, resulting in unqualified product cleanliness. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a leak testing plugging structure, which has a simple structure, can achieve plugging without relying on a clamping device, and is suitable for plugging various types of holes.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A leak testing and sealing plug structure, characterized in that it includes a pan head bolt, on which a first elastic compression piece, hard rubber, a metal sheet, a second elastic compression piece, and a first fixing sheet are sequentially sleeved, and a compression nut is threadedly provided on the pan head bolt, wherein the lower end of the first elastic compression piece abuts against the pan head of the pan head bolt, and in a natural state, the outer diameters of the first elastic compression piece, the hard rubber, and the second elastic compression piece are equal, and the outer diameter of the metal sheet is not greater than the outer diameter of the hard rubber.

[0006] Furthermore, a second fixing plate is arranged between the second elastic compression member and the first fixing plate, the second fixing plate has an embedding groove, a fixed tuning fork is arranged in the embedding groove, the pan head bolt has an annular groove corresponding to the fixed tuning fork, and the width of the annular groove is greater than the thickness of the fixed tuning fork.

[0007] Furthermore, the pan head bolt has a first thread segment located above the annular groove and a second thread segment located below the annular groove.

[0008] Furthermore, the first elastic compression member and the second elastic compression member are both high elastic compression foam or silicone.

[0009] Furthermore, the pan head bolt has a plurality of radially penetrating position observation holes, and the plurality of position observation holes are evenly distributed on the pan head bolt.

[0010] The beneficial effects of the present invention include: simple structure, low manufacturing cost, and good sealing effect. Sealing can be achieved without applying an external clamping device, and is suitable for sealing various structural holes such as deep holes, thin-walled holes, chamfered holes, and rounded holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 It is the state before the present invention is used;

[0013] Figure 3 yes Figure 2 Cross-sectional view of AA in the middle;

[0014] Figure 4 This is a diagram of the use state of the present invention for thin-walled holes;

[0015] Figure 5 It is a usage state diagram of the present invention for deep holes. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] A kind of Figure 1 The leak test plugging structure shown includes a pan head bolt 3, on which the first elastic compression member 4, hard rubber 5, metal sheet 6, second elastic compression member 7, and first fixing sheet 10 are sequentially sleeved, and a compression nut 11 is threadedly provided on the pan head bolt 3, wherein the lower end of the first elastic compression member 4 abuts against the pan head of the pan head bolt 3, and the first elastic compression member 4 and the second elastic compression member 7 are both highly elastic compression foam or silicone. In the natural state, the outer diameters of the first elastic compression member 4, hard rubber 5, and second elastic compression member 7 are equal so that they can be smoothly inserted into the hole, the outer diameter of the metal sheet 6 is not greater than the outer diameter of the hard rubber 5, and the metal sheet 6 does not affect the insertion into the hole to be plugged, and the function of the metal sheet 6 is to make the end surface of the second elastic compression member 7 uniformly accepted.

[0018] like Figure 1-35, a second fixing plate 8 is arranged between the second elastic compression member 7 and the first fixing plate 10. The second fixing plate 8 has an embedding groove, and a fixed tuning fork 9 is arranged in the embedding groove. The pan head bolt 3 has an annular groove 12 corresponding to the fixed tuning fork 9, and the width of the annular groove 12 is greater than the thickness of the fixed tuning fork 9. During assembly, the first elastic compression member 4, the hard rubber 5, the metal sheet 6, the second elastic compression member 7, and the second fixing plate 8 are sequentially installed on the pan head bolt 3, and the second fixing plate 8 is lightly pressed to make the parts below it fit tightly. At this time, the fixed tuning fork 9 is placed so that the first elastic compression member 4, the hard rubber 5, the metal sheet 6, and the second elastic compression member 7 below are no longer loose. Finally, the first fixing plate 10 and the compression nut 11 are installed to complete the assembly. When in use, the plug is inserted into the hole to be blocked (the hole can be a deep hole or a thin-walled hole, or a processed hole or an unprocessed blank hole, or a hole with processed chamfers and precast fillets). By rotating the compression nut 11, the first elastic compression member 4, the hard rubber 5, and the second elastic compression member 7 are squeezed to make them expand and deform laterally to block the side wall of the hole. When blocking a deep hole, the first elastic compression member 4 and the second elastic compression member 7 can be inserted into the hole, or only one of them can be inserted into the hole for compression and blocking. The other one is located at the end of the hole for blocking, so that the blocking effect is better and foreign matter can be prevented from entering the hole.

[0019] like Figure 4 As shown, the pan head bolt 3 has a first threaded section 13 located above the annular groove 12 and a second threaded section 14 located below the annular groove 12. When used to block a thin-walled hole, the fixed tuning fork 9 needs to be removed so that the first elastic compression member 4, the hard rubber 5, and the second elastic compression member 7 can obtain a larger compression amount. The compression nut 11 cooperates with the second threaded section 14. At this time, the hole can be blocked by compressing and expanding the first elastic compression member 4. After compression, the expansion of the foam of the first elastic compression member 4 will form an outward expansion to block the complete mouth, and the blocking can also be completed by the second elastic compression member 7. In this way, the first elastic compression member 4 is blocked on the inside of the product, so that when the second elastic compression member 7 is abnormal, the plug will not fall out because the first elastic compression member 4 remains in an expanded state. The first elastic compression member 4 and the second elastic compression member 7 can also be forced to compress the first elastic compression member 4 and the second elastic compression member 7 through interference fit between the hard rubber 5 and the hole, so that the inner and outer end faces of the hole are sealed and blocked, making the blocking more firm and not falling.

[0020] The pan head bolt 3 has a plurality of radially penetrating position observation holes 15, which are evenly spaced on the pan head bolt 3. The exposed position observation holes 15 are used to determine whether the first elastic compression member 4 and the second elastic compression member 7 are compressed in place.

[0021] After use, it is only necessary to loosen the compression nut 11 to restore the first elastic compression member 4 and the second elastic compression member 7 to their natural state and then remove the plug.

[0022] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A leak testing and plugging plug structure, characterized in that: The invention comprises a pan head bolt (3), on which a first elastic compression member (4), hard rubber (5), a metal sheet (6), a second elastic compression member (7), and a first fixing sheet (10) are sequentially sleeved, and a compression nut (11) is threadedly provided on the pan head bolt (3), wherein the lower end of the first elastic compression member (4) abuts against the pan head of the pan head bolt (3), and in a natural state, the outer diameters of the first elastic compression member (4), the hard rubber (5), and the second elastic compression member (7) are equal, and the outer diameter of the metal sheet (6) is not greater than the outer diameter of the hard rubber (5).

2. A leak testing and plugging plug structure according to claim 1, characterized in that: A second fixing plate (8) is arranged between the second elastic compression member (7) and the first fixing plate (10), the second fixing plate (8) has an embedding groove, a fixed tuning fork (9) is arranged in the embedding groove, the pan head bolt (3) has an annular groove (12) corresponding to the fixed tuning fork (9), and the width of the annular groove (12) is greater than the thickness of the fixed tuning fork (9).

3. A leak testing and plugging plug structure according to claim 2, characterized in that: The pan head bolt (3) has a first thread section (13) located above the annular groove (12) and a second thread section (14) located below the annular groove (12).

4. A leak testing and plugging plug structure according to claim 1, characterized in that: The first elastic compression member (4) and the second elastic compression member (7) are both highly elastic compression foam or silica gel.

5. A leak testing and plugging plug structure according to claim 1, characterized in that: The pan head bolt (3) is provided with a plurality of radially penetrating position observation holes (15), and the plurality of position observation holes (15) are evenly distributed on the pan head bolt (3).

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