CN211145330U - Expansion sealing device in round tube - Google Patents
Expansion sealing device in round tube Download PDFInfo
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- CN211145330U CN211145330U CN201921767373.6U CN201921767373U CN211145330U CN 211145330 U CN211145330 U CN 211145330U CN 201921767373 U CN201921767373 U CN 201921767373U CN 211145330 U CN211145330 U CN 211145330U
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- air inlet
- inlet shaft
- sleeve
- shaft
- axle sleeve
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Abstract
The embodiment of the utility model discloses a tight sealing device expands in pipe, including air inlet shaft and axle sleeve, the terminal surface of axle sleeve inwards sets up the recess with air inlet shaft assorted, the bottom fixed mounting of recess has flat wire coil spring, the one end of air inlet shaft is worn to establish in the recess and through the pressure baffle sliding connection between air inlet shaft and the axle sleeve, the lower extreme of axle sleeve is provided with the locating piece that is used for restricting air inlet shaft to move, the other end of air inlet shaft is connected with the position sleeve, the last cover of air inlet shaft is equipped with spacer sleeve and O shape circle along the direction of pressure baffle to position sleeve in order, the axle sleeve is external to be used for promoting the axle sleeve to go forward and drive spacer sleeve extrusion O shape circle and the tight cylinder of work piece inner wall inflation; the embodiment of the utility model provides a from inside seal work piece port, reduce the damage of sealing material and change the frequency, application scope is wide, does not influence the port size, does not have any influence to the product surface simultaneously, prevents appearance defect's production.
Description
Technical Field
The embodiment of the utility model provides a gas tightness testing tool technical field, concretely relates to tight sealing device expands in pipe.
Background
During the processing of the workpiece, a workpiece with a requirement of air tightness is often processed in the workpiece. After the workpiece with the air tightness requirement is processed, air tightness detection is carried out. The current airtightness detection for such workpieces is generally performed manually. Generally, after a workpiece is manually taken, an air inlet of the workpiece is inflated, and then the air pressure inside the workpiece is measured through an air pressure detection sensor. Whether the product is qualified or not is judged according to the measurement condition of the air pressure in the workpiece.
Because pipe work piece gas tightness test is mostly end face seal, need exert the exogenic action to the work piece terminal surface after, carry out the gas tightness test. When the end face is sealed, the end face of the pipe fitting is mostly sharp edges, the sealing material is easily damaged, and the service life is extremely short. In addition, with the technical update of the industry, more and more end faces of products have complex structures and higher dimensional requirement precision, and if external force is applied to the end faces in the air tightness test, the dimensional precision of the products can be influenced. Resulting in product failure.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a tight sealing device expands in pipe to solve among the prior art pipe and attack that the terminal surface structure is complicated and dimensional requirement precision is high and the easy that leads to cause the damage to sealing material and exert the size precision problem that external force may influence the product to the terminal surface.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
the utility model provides a tight sealing device expands in pipe, includes air inlet shaft and axle sleeve, the terminal surface of axle sleeve inwards seted up with air inlet shaft assorted recess, the bottom fixed mounting of recess has flat wire coil spring, air inlet shaft's one end is worn to establish in the recess just through pressure shield sliding connection between air inlet shaft and the axle sleeve, the lower extreme of axle sleeve is provided with the locating piece that is used for restricting air inlet shaft and removes, air inlet shaft's the other end is connected with the position sleeve, air inlet shaft is last to overlap in order along pressure shield to the direction of position sleeve and is equipped with spacer sleeve and O shape circle, the axle sleeve is external to be equipped with and is used for promoting the axle sleeve to advance and drive spacer sleeve extrusion O shape circle and the tight cylinder of work piece inner wall.
Furthermore, a block-shaped groove which is the same as the compressing baffle in size is formed in the air inlet shaft in a penetrating mode, a strip-shaped groove is formed in the shaft sleeve in a penetrating mode, and the compressing baffle is arranged in the strip-shaped groove and the block-shaped groove in a penetrating mode to enable the shaft sleeve and the air inlet shaft to be connected into a whole and can slide relatively.
Furthermore, the positioning sleeve is fixed at the end part of the air inlet shaft through a screw with a hole and is communicated with an air outlet of an air inlet channel in the air inlet shaft, and a thread through communicated with an air inlet of the air inlet channel of the air inlet shaft is further installed on the air inlet shaft.
Furthermore, the connecting end of the air inlet shaft and the positioning sleeve is of an outward-expanding conical structure, and the sleeving end of the positioning sleeve is also provided with a conical surface matched with the air inlet shaft.
Furthermore, the difference between the outer diameter of the O-shaped ring and the inner diameter of the conventional round pipe workpiece is 0.9-1.1 mm.
The embodiment of the utility model provides a have following advantage:
the embodiment of the utility model provides a relative motion through cylinder adjustment axle sleeve and air inlet shaft to promote the spacer sleeve and make its interval that shortens with the position sleeve, extrude O shape circle, make its radially expand outward, expand tightly with the work piece inner wall, carry out the sealing performance test, the device is from inside seal work piece port, reduces the damage and the change frequency of sealing material, and application scope is wide, does not influence the port size, does not have any influence to the product surface simultaneously, prevents appearance defect's production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a cross-sectional view of a sealing device according to an embodiment of the present invention;
fig. 2 is a top view of the sealing device shown in fig. 1.
In the figure:
1-thread through; 2-a screw with a hole; 3-O-shaped rings; 4-flat wire coil spring; 5-shaft sleeve; 6-an air inlet shaft; 7-spacer sleeve; 8-positioning sleeve; 9-pressing the baffle; 10-positioning blocks; 11-grooves.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the utility model provides a tight sealing device expands in pipe, including air inlet shaft 6 and axle sleeve 5, the terminal surface of axle sleeve 5 inwards seted up with air inlet shaft 6 assorted recess 11, the bottom fixed mounting of recess 11 has flat wire coil spring 4, air inlet shaft 6's one end is worn to establish in recess 11 just through pressure baffle 9 sliding connection between air inlet shaft 6 and the axle sleeve 5, the lower extreme of axle sleeve 5 is provided with the locating piece 10 that is used for restricting air inlet shaft 6 and removes, air inlet shaft 6's the other end is connected with position sleeve 8, it is equipped with spacer 7 and O shape circle 3 to overlap in order along pressure baffle 9 to position sleeve 8 direction on the air inlet shaft 6, axle sleeve 5 is external to be equipped with and is used for promoting axle sleeve 5 to advance and drive spacer 7 extrusion O shape circle 3 and the tight cylinder of work piece inner wall inflation.
Specifically, the sliding connection between the intake shaft 6 and the shaft sleeve 5 is as follows: the air inlet shaft 6 is provided with a block-shaped groove which is consistent with the compressing baffle plate 9 in size in a penetrating mode, the shaft sleeve 5 is provided with a strip-shaped groove in a penetrating mode, and the compressing baffle plate 9 penetrates through the strip-shaped groove and the block-shaped groove to enable the shaft sleeve 5 and the air inlet shaft 6 to be connected into a whole and to be capable of sliding relatively.
The connecting end of the air inlet shaft 6 and the positioning sleeve 8 is of an outward-expanding conical structure, and the sleeve-setting end of the positioning sleeve 8 is also provided with a conical surface matched with the air inlet shaft 6.
Based on above-mentioned sealing device's current structure, the utility model discloses specific working procedure is:
firstly, the air cylinder pushes the shaft sleeve 5 and the air inlet shaft 6 to advance together, because the notch formed on the air inlet shaft 6 is a block-shaped groove and the notch formed on the shaft sleeve 5 is a strip-shaped groove, when the pressing baffle 9 is contacted with the positioning block 10, the air inlet shaft 6 stops moving under the action of obstruction, the shaft sleeve 6 continues to move forward under the action of continuous pushing of the air cylinder and compresses the flat wire spiral spring 4, the shaft sleeve 5 drives the spacing sleeve 7 to continue to advance, and therefore the O-shaped ring 3 climbs towards the conical structure of the air inlet shaft 6 until the clearance between the spacing sleeve 7 and the positioning sleeve 8 is the same as the wire diameter of the O-shaped ring 3. The air cylinder continues to advance, the gap between the spacing sleeve 7 and the positioning sleeve 8 is reduced, and the O-shaped ring 3 is extruded in diameter, expands radially outwards and expands tightly with the inner wall of the workpiece. The sealing function is realized.
After the test is finished, the air cylinder rod retreats, the pressing baffle 9 is separated from the positioning block 10, the flat wire spiral spring 4 is bounced open to push the air inlet shaft 6 to move reversely relative to the shaft sleeve 5, the spacing sleeve 7 and the air inlet shaft 6 drive the positioning sleeve 8 to move reversely relative to the shaft sleeve 5, the O-shaped ring 3 is not subjected to extrusion force any more, and the O-shaped ring is restored to an initial state.
In order to ensure that the shaft sleeve 5 can still continue to move after the air inlet shaft 6 stops moving under the blocking action of the positioning block 10 in the above process, the length of the strip-shaped groove on the shaft sleeve 5 is equal to the length of the block-shaped groove on the air inlet shaft 6 plus the moving distance of the spacer sleeve 7, wherein the moving distance of the spacer sleeve 7 refers to the moving distance of the spacer sleeve 7 after the air cylinder continues to advance until the O-shaped ring 3 is radially expanded after the compression baffle 9 is contacted with the positioning block 10.
Furthermore, the positioning sleeve 8 is fixed at the end of the air inlet shaft 6 through a bolt 2 with a hole and is communicated with an air outlet of an air inlet channel in the air inlet shaft 6, and a thread through-hole 1 communicated with an air inlet of the air inlet channel of the air inlet shaft 6 is further installed on the air inlet shaft 6.
When the workpiece needs to be subjected to air tightness test, test gas can be introduced from the thread through hole 1, then the test gas enters the test workpiece through the gas inlet channel of the gas inlet shaft 6 and the hole of the screw 2 with the hole, and the air tightness test operation is carried out.
In addition, the embodiment of the utility model provides a when selecting O shape circle 3, consider that O shape circle 3 expands tightly highly limitedly, O shape circle 3's external diameter size with the difference of the internal diameter of current pipe work piece is 0.9mm-1.1mm, is equallyd approximately equal to about 1mm promptly, and O shape circle 3's silk footpath size should select relatively great value as far as possible.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The utility model provides a tight sealing device expands in pipe, includes air inlet shaft (6) and axle sleeve (5), its characterized in that, the terminal surface of axle sleeve (5) inwards seted up with air inlet shaft (6) assorted recess (11), the bottom fixed mounting of recess (11) has flat wire coil spring (4), the one end of air inlet shaft (6) is worn to establish in recess (11) just through pressure shield (9) sliding connection between air inlet shaft (6) and axle sleeve (5), the lower extreme of axle sleeve (5) is provided with locating piece (10) that are used for restricting air inlet shaft (6) and remove, the other end of air inlet shaft (6) is connected with position sleeve (8), it is equipped with spacer sleeve (7) and O shape circle (3) to overlap in order along pressure shield (9) to the direction of position sleeve (8) on air inlet shaft (6), axle sleeve (5) have and are used for promoting that axle sleeve (5) is external to advance and drive spacer sleeve (7) extrusion O shape circle (3) and work piece inner wall expand A tight cylinder.
2. The round tube internal expansion sealing device according to claim 1, wherein a block-shaped groove with the same size as the compression baffle (9) is formed in the air inlet shaft (6) in a penetrating manner, a strip-shaped groove is formed in the shaft sleeve (5) in a penetrating manner, and the compression baffle (9) is arranged in the strip-shaped groove and the block-shaped groove in a penetrating manner to enable the shaft sleeve (5) and the air inlet shaft (6) to be connected into a whole and to slide relatively.
3. The expansion sealing device in the round tube according to claim 1, characterized in that the positioning sleeve (8) is fixed at the end of the air inlet shaft (6) through a screw (2) with a hole and is communicated with the air outlet of the air inlet channel inside the air inlet shaft (6), and the air inlet shaft (6) is further provided with a thread through-hole (1) communicated with the air inlet of the air inlet channel of the air inlet shaft (6).
4. The round tube internal expansion sealing device according to claim 1, wherein the connecting end of the air inlet shaft (6) and the positioning sleeve (8) is of an outward-expanding conical structure, and the sleeved end of the positioning sleeve (8) is also provided with a conical surface matched with the air inlet shaft (6).
5. The expansion sealing device in the round tube as claimed in claim 1, wherein the difference between the outer diameter dimension of the O-ring (3) and the inner diameter of the round tube workpiece is 0.9mm-1.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921767373.6U CN211145330U (en) | 2019-10-21 | 2019-10-21 | Expansion sealing device in round tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921767373.6U CN211145330U (en) | 2019-10-21 | 2019-10-21 | Expansion sealing device in round tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211145330U true CN211145330U (en) | 2020-07-31 |
Family
ID=71771356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921767373.6U Active CN211145330U (en) | 2019-10-21 | 2019-10-21 | Expansion sealing device in round tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211145330U (en) |
-
2019
- 2019-10-21 CN CN201921767373.6U patent/CN211145330U/en active Active
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