CN218510364U - Two-stage internal locking structure of connecting pipe - Google Patents
Two-stage internal locking structure of connecting pipe Download PDFInfo
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- CN218510364U CN218510364U CN202222414172.6U CN202222414172U CN218510364U CN 218510364 U CN218510364 U CN 218510364U CN 202222414172 U CN202222414172 U CN 202222414172U CN 218510364 U CN218510364 U CN 218510364U
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Abstract
The invention discloses a two-stage inner locking structure of a connecting pipe, which comprises: the inner wall of the connecting head is provided with an annular groove, the groove comprises at least two groove cavities with different depths, the groove cavities are respectively a first-stage groove cavity and a second-stage groove cavity, the connecting head is provided with a bolt mounting hole, one end of the bolt mounting hole is positioned on the outer wall of the connecting head, and the other end of the bolt mounting hole is positioned on the second bottom wall; a telescopic snap ring; and the flexible hard bolt can penetrate into the second-stage groove cavity from the bolt mounting hole to limit the telescopic clamping ring in the first-stage groove cavity. According to the invention, the bolt mounting hole and the flexible hard bolt are additionally arranged, and the flexible hard bolt is inserted into the second-stage groove cavity through the bolt mounting hole, so that the space of the second-stage groove cavity can be occupied, the telescopic clamping ring is prevented from falling into the second-stage groove cavity, and the telescopic clamping ring can be extruded into the first-stage groove cavity.
Description
Technical Field
The invention relates to the technical field of pipeline joints, in particular to a two-stage inner locking structure of a connecting pipe.
Background
Most of the existing quick-connection hard pipe fittings rely on a telescopic clamping ring to be clamped between an inserting pipe and a connecting head, so that locking is realized. For example, the inner wall of the connecting head of part of products is provided with an annular groove, and the telescopic clamping ring is placed in the annular groove. The ring retaining wall, the rear retainer ring retaining wall and at least two stages of groove cavities with different inner diameters are utilized. The slot cavity includes first order slot cavity and second level slot cavity respectively, and first order slot cavity is closer to the port of connecing the head than the second level slot cavity, and the degree of depth in second level slot cavity is darker than first order slot cavity, and preceding snap ring keeps off the wall and is connected with the front end of first diapire, and back snap ring keeps off the wall and is connected with the rear end of second diapire. The matched plug pipe is provided with a boss or a groove. If the inserting pipe is pulled out, the inclined plane provided by the lug boss or the groove can extrude the telescopic clamping ring into the first-stage groove cavity and realize locking.
However, this locking method has a problem that is difficult to solve. The structure can only prevent the plug pipe from being pulled out outwards, and can not prevent the plug pipe from going deep into the direction of the connecting head. When the inserting pipe goes deep towards the connecting head, the telescopic clamping ring can fall into the second-stage groove cavity again. Under this condition, if pipe-line system meets with impact such as water hammer (water hammer), then can appear the problem that flexible snap ring can't in time be absorbed in among the first order vallecular cavity easily for the structure of plugging into became invalid, the pipe of pegging graft breaks away from the joint of plugging into, and pipe-line system is destroyed.
Disclosure of Invention
The present invention is directed to a two-stage inner locking structure of a connecting pipe, which solves one or more of the problems of the prior art and provides at least one of the advantages of the two-stage inner locking structure.
The invention provides a two-stage internal locking structure of a connecting pipe, which comprises:
the connector comprises a connector head, wherein the front end of the connector head is an insertion port, the inner wall of the connector head is provided with an annular groove, the groove comprises a front snap ring blocking wall, a rear snap ring blocking wall, a connecting section and at least two groove cavities with different depths, the groove cavities are respectively a first-stage groove cavity and a second-stage groove cavity, the first-stage groove cavity is provided with a first bottom wall, the second-stage groove cavity is provided with a second bottom wall, the first bottom wall and the second bottom wall are connected through the connecting section, the first-stage groove cavity is closer to the insertion port than the second-stage groove cavity, the front snap ring blocking wall is connected with the front end of the first bottom wall, the rear snap ring blocking wall is connected with the rear end of the second bottom wall, and the connector head is provided with a bolt mounting hole,the bolt mounting hole link up the wall body of connecing the head, the one end of bolt mounting hole is located the outer wall of connecing the head, and the other end is located the second diapire, the degree of depth of first order vallecular cavity is h 1 The depth of the second-stage groove cavity is h 2 Satisfy h 2 ＞h 1 ；
The telescopic clamping ring is a member which is formed by bending a metal strip with the diameter of a and has elasticity, and is placed in the groove;
and the flexible hard bolt can penetrate into the second-stage groove cavity from the bolt mounting hole to limit the telescopic clamping ring in the first-stage groove cavity.
The connecting head can be an independent connecting part and can also be a local connecting structure integrally formed with the pipe fitting. The inner wall of the connector may have a plurality of different height fall regions, but the inner wall of the connector port is used as a reference surface, so that the h 1 、h 2 The equal value is the fall distance between the inner wall at the socket port and the first bottom wall/the second bottom wall.
The flexible hard bolt is flexible, namely the flexible hard bolt can be bent into an arc under the action of external force; by "hard" is meant a stiffness that resists radial forces and forces from an attack without radial deformation.
In some embodiments, the flexible hard plug includes a body, and a grip and/or a guide cable. The body is used for providing limiting and supporting effects. The handle exposes outside the bolt mounting hole, can be convenient for follow-up pipeline overhauls the time take out fast flexible stereoplasm bolt realizes plugging into convenient disassembling of pipe second grade internal locking structure. A preset narrower and softer guide rope can firstly penetrate into the bolt mounting hole and pass out of the bolt mounting hole again after winding the second-stage slot cavity for a circle, and then the body is guided to enter the second-stage slot cavity.
In some embodiments, the body is a cylindrical spring member, a plastic strip member, a beaded chain member, a metal braided rope member, or a wavy sheet metal member, among others. The common characteristic of the connection pipe is that the connection pipe can penetrate into the second-stage groove cavity along an annular track, and meanwhile, the connection pipe has certain limiting and supporting capabilities, and the telescopic clamping ring can be limited in the first-stage groove cavity, so that the connection pipe and the connection head are locked.
In some embodiments, the body has a radial compressive strength > 100N.
In some embodiments, the flexible hard bolt comprises a body and a handle, the handle is connected with the head end of the body, and the cross section of the handle is larger than that of the bolt mounting hole. Because the section of the handle is larger than the plug pin mounting hole, the flexible hard plug pin is not worried to be totally sunk into the second-stage groove cavity and is difficult to take out.
In some embodiments, the flexible hard bolt comprises a body and a guide cable, wherein the guide cable is connected with the tail end of the body, and the cross section of the guide cable is smaller than that of the bolt mounting hole. It is difficult to insert the body directly into the secondary pocket due in part to the need to provide compression to the snap ring by the flexible hard plug to achieve an interference fit. Therefore, the guide rope which is narrower and softer is preset, the guide rope can penetrate into the bolt mounting hole in advance and wind the second-stage slot cavity for a circle and then penetrate out of the bolt mounting hole again, and then the body is guided to enter the second-stage slot cavity, so that the mounting difficulty is reduced.
In some embodiments, the guide cable is a point or line connection with the body. After the guide cable guides the body to completely enter the second-stage groove cavity, the connection between the guide cable and the body can be manually broken in a twisting mode, a folding mode and the like, so that the redundant part is prevented from remaining outside the second-stage inner locking structure of the connecting pipe.
In some embodiments, the docking tube secondary internal locking structure further comprises a docking tube. The surface of the insertion pipe is provided with an annular locking area, and the connection head is relatively locked with the insertion pipe through the locking area and the first bottom wall clamping and the telescopic clamping ring. The locking area can be a groove capable of partially accommodating the telescopic snap ring, can be an area with relative height drop formed by the protrusion of the peripheral area, and can even be an annular area without a specific mark somewhere on the smooth pipe wall.
In some embodiments, when the distance between the outer wall of the insertion tube and the first bottom wall is smaller than a, the flexible hard bolt can extrude the telescopic snap ring into the first-stage groove cavity, so that the connection head and the insertion tube are locked in an interference fit manner.
In some embodiments, the secondary internal locking structure of the connector tube further comprises a sealing ring. The inner wall of the connecting head or the outer wall of the inserting pipe is also provided with a sealing ring positioning groove for installing the sealing ring. Because the existence of bolt mounting hole, consequently need be through setting up at least one sealing washer in order to ensure its gas tightness, avoid pipe-line system to take place the seepage.
The invention has the following beneficial effects:
according to the invention, the bolt mounting hole and the flexible hard bolt are additionally arranged, and the flexible hard bolt is inserted into the second-stage groove cavity through the bolt mounting hole, so that the space of the second-stage groove cavity can be occupied, the telescopic clamping ring is prevented from falling into the second-stage groove cavity, and the telescopic clamping ring can be extruded into the first-stage groove cavity.
Drawings
FIG. 1 is an exploded view of the parts of example 1;
FIG. 2 is an assembly view of embodiment 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an assembly view of embodiment 2;
fig. 5 is a partially enlarged view at B in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, a two-stage inner locking structure of a connecting pipe. This locking structure in pipe second grade of plugging into is plugged into in the structure by current hard pipe and is reformed transform and form, include:
connect and refute head 110, the front end that connects and refute head 110 is the grafting port, the inner wall that connects and refute head 110 is equipped with annular recess, the recess includes the different vallecular cavity of two-stage degree of depth, the vallecular cavity is first order vallecular cavity 111 and second level vallecular cavity 112 respectively, connect and refute head 110 and be equipped with bolt mounting hole 113, bolt mounting hole 113 link up connect and refute head 110's wall body, the one end of bolt mounting hole 113 is located connect and refute head 110's outer wall, the other end penetrates second level vallecular cavity 112. The first stage cavity 111 has a depth of 1mm and a width of about 2mm. The second stage cavity 112 has a depth of 3mm and a width of about 2mm.
The retractable snap ring 120 is a circular ring member formed by bending a metal strip having a diameter of 1.5 mm. An expansion joint is arranged between the two ends of the circular ring, so that the diameter of the circular ring can be expanded or reduced under the action of external force and is placed in the groove.
The flexible hard latch 130 is a cylindrical spring member wound from wire to a diameter of about 2mm.
The plug pipe 140 is provided with an annular groove 141 on the outer wall, and the depth of the groove 141 is about 0.5mm and the width is about 1mm.
The assembling process of the secondary inner locking structure of the connecting pipe is as follows:
1) Placing the telescopic snap ring 120 in the groove of the connector head 110;
2) Inserting the inserting tube 140 into the connecting head 110 from the inserting port until the telescopic snap ring 120 falls into the groove 041 on the surface of the inserting tube 140;
3) The inserting pipe 140 is reversely pulled out, so that the telescopic clamping ring 120 is driven by the groove 141 to move into the first-stage groove cavity 111;
4) The flexible hard latch 130 is inserted into the second stage cavity 112 from the latch mounting hole 113.
The two-stage inner locking structure of the assembled connecting pipe is shown in fig. 2 and 3. The first-stage groove cavity 111 and the groove 141 form an annular cavity which can just accommodate the telescopic snap ring 120, and the adjacent second-stage groove cavity 112 is basically filled with the flexible hard plug 130. Therefore, the telescopic snap ring 120 has limited freedom in the axial direction of the connection pipe 140, and cannot move in a translational manner, so that the connection head 110 and the connection pipe 140 are locked relatively.
Example 2
As shown in fig. 4, a two-stage inner locking structure of a connecting pipe includes:
connect and refute head 210, the front end that connects and refute head 210 is the grafting port, the inner wall that connects and refute head 210 is equipped with annular recess, the recess includes the different vallecular cavity of two-stage degree of depth, the vallecular cavity is first order vallecular cavity and second grade vallecular cavity respectively, connect and refute head 210 to be equipped with bolt mounting hole 213, bolt mounting hole 213 link up connect and refute head 210's wall body, the one end of bolt mounting hole 213 is located connect and refute head 210's outer wall, the other end penetrates second grade vallecular cavity. The depth of the first-stage groove cavity is 1.7mm, and the width of the first-stage groove cavity is about 2mm. The depth of the second stage groove cavity is 3mm, and the width is about 2.5mm.
The retractable snap ring 220 is a circular ring member formed by bending a metal strip having a diameter of 2mm. An expansion joint is arranged between the two ends of the circular ring, so that the diameter of the circular ring can be expanded or reduced under the action of external force and is placed in the groove.
The flexible hard pin 230 is a ball chain member of about 2.5mm diameter.
The insertion tube 240 is a smooth-walled tube.
The assembling process of the secondary inner locking structure of the connecting pipe is as follows:
1) Placing the telescopic snap ring 220 in the groove of the connector 210;
2) Inserting the docking tube 240 into the docking head 210 from the docking port to a suitable depth;
3) The flexible hard plug 230 is inserted into the second-stage groove cavity 212 from the plug mounting hole 213, so that the telescopic snap ring 220 is pressed into the first-stage groove cavity 211 to realize interference fit.
As shown in fig. 5, the main difference between the second-stage inner locking structure of the docking pipe in this embodiment and embodiment 1 is that no groove is provided on the surface of the docking pipe 240, but the distance between the first bottom wall of the first-stage groove cavity 211 and the outer wall of the docking pipe 240 is adjusted. Since there is a machining gap of about 0.1mm between the outer wall of the insertion tube 240 and the inner wall of the connector 210, even if 1.3mm of the depth of the first-stage groove cavity 211 is added, the total gap (about 1.4 mm) is still slightly smaller than the thickness of the telescopic snap ring 220. Therefore, when the flexible hard plug 230 is forced into the first-stage cavity 212, the retractable snap ring 220 is forced into the first-stage cavity 211 and presses the surface of the insertion tube 240, thereby forming a locking region and realizing an interference fit.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The utility model provides a locking structure in pipe of plugging into second grade which characterized in that includes:
connect the head, the front end of connecting the head is the grafting port, the inner wall of connecting the head is equipped with annular recess, the recess includes that preceding snap ring keeps off the wall, the groove cavity that back snap ring kept off the wall, linkage segment and at least two-stage degree of depth are different, the groove cavity is first order groove cavity and second level groove cavity respectively, first order groove cavity has first diapire, second level groove cavity has the second diapire, first diapire with pass through between the second diapire the linkage segment is connected, first order groove cavity compares second level groove cavity is closer to the grafting port, preceding snap ring keeps off the wall and is connected with the front end of first diapire, back snap ring keeps off the wall and is connected with the second end at the bottom of the wallThe rear end of wall is connected, the connection head is equipped with the bolt mounting hole, the bolt mounting hole link up the wall body of connection head, the one end of bolt mounting hole is located the outer wall of connection head, the other end is located the second diapire, the degree of depth of first order vallecular cavity is h 1 The depth of the second-stage groove cavity is h 2 Satisfy h 2 ＞h 1 ；
The telescopic clamping ring is an elastic component formed by bending a metal strip and is placed in the groove;
and the flexible hard bolt can penetrate into the second-stage groove cavity from the bolt mounting hole to limit the telescopic clamping ring in the first-stage groove cavity.
2. The secondary internal locking structure of a connector tube of claim 1, wherein the flexible hard plug comprises a body, and a grip and/or a guide cable.
3. The secondary internal locking structure of a connector tube of claim 2, wherein the body is a cylindrical spring member, a plastic strip member, a wavy bead chain member, a metal braided rope member, or a wavy metal sheet member.
4. The connector tube secondary internal locking structure of claim 2, wherein the radial compressive strength of the body is > 100N.
5. The secondary internal locking structure of a docking pipe as claimed in claim 2, wherein the flexible hard plug comprises a body and a handle, the handle is connected with the head end of the body, and the cross section of the handle is larger than that of the plug mounting hole.
6. The secondary internal locking structure of a connecting pipe as claimed in claim 2, wherein the flexible hard plug comprises a body and a guide cable, the guide cable is connected with the tail end of the body, and the cross section of the guide cable is smaller than that of the plug mounting hole.
7. The connecting tube secondary internal locking structure of claim 6, wherein the guiding cable is connected with the body by a point or a line.
8. The secondary internal locking structure of a connection pipe according to claim 1, further comprising a connection pipe, wherein an annular locking region is disposed on a surface of the connection pipe, and the telescopic snap ring is clamped between the locking region and the first bottom wall to lock the connection head and the connection pipe relatively.
9. The secondary internal locking structure of a connecting pipe according to claim 8, further comprising a sealing ring, wherein a sealing ring positioning groove for mounting the sealing ring is further provided on the inner wall of the connecting head or the outer wall of the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222414172.6U CN218510364U (en) | 2022-09-09 | 2022-09-09 | Two-stage internal locking structure of connecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222414172.6U CN218510364U (en) | 2022-09-09 | 2022-09-09 | Two-stage internal locking structure of connecting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218510364U true CN218510364U (en) | 2023-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222414172.6U Active CN218510364U (en) | 2022-09-09 | 2022-09-09 | Two-stage internal locking structure of connecting pipe |
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| Country | Link |
|---|---|
| CN (1) | CN218510364U (en) |
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- 2022-09-09 CN CN202222414172.6U patent/CN218510364U/en active Active
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