CN116877694A - Self-locking sealing ring and plug-in connecting pipe - Google Patents

Abstract

The application discloses a self-locking sealing ring and an inserted connection pipe. The self-locking sealing ring comprises: the annular body part comprises an inner surface and a first end surface, the diameter of the inner surface gradually decreases along the positive direction of the first direction, and the first end surface is positioned at the end part of the body part facing away from the positive direction of the first direction; a ratchet part arranged at the end part of the inner surface along the positive direction of the first direction; the ratchet wheel part comprises a wheel body part and a thorn part; the ratchet part is arranged on the surface of the wheel body along the direction from the inner surface to the first end surface and inclines towards the direction from the inner surface to the first end surface. The self-locking sealing ring and the plug-in connecting pipe disclosed by the application have a self-locking function, and the possibility of disconnection after the plug-in connecting pipe is plugged in is reduced.

Description

Self-locking sealing ring and plug-in connecting pipe

Technical Field

The application relates to the technical field of connecting pipe socket and spigot, in particular to a self-locking sealing ring and a plug-in connecting pipe.

Background

The connecting pipe is used for conveying fluids such as water, oil, gas and the like in a long distance and large flow rate. Typically, a plurality of connection tube bodies are prefabricated and then connected together, such as by plugging or flange connection. When two connecting pipe bodies are spliced together, a sealing ring is usually arranged for ensuring good sealing at the spliced position of the connecting pipes. After the two connecting pipes are spliced, the possibility that the socket end and the spigot end are mutually separated exists under the action of the axial external force of the two connecting pipe bodies, so that the normal use of the connecting pipes is affected.

Disclosure of Invention

The embodiment of the application provides a self-locking sealing ring and an inserted connection pipe, which can have a self-locking function and reduce the possibility of disconnection after the inserted connection pipe is inserted.

In a first aspect, a self-locking seal ring is provided, comprising: the annular body part comprises an inner surface and a first end surface, the diameter of the inner surface gradually decreases along the positive direction of the first direction, and the first end surface is positioned at the end part of the body part facing away from the positive direction of the first direction; a ratchet part arranged at the end part of the inner surface along the positive direction of the first direction; the ratchet wheel part comprises a wheel body part and a thorn part; the ratchet part is arranged on the surface of the wheel body along the direction from the inner surface to the first end surface and inclines towards the direction from the inner surface to the first end surface.

According to an embodiment of the first aspect of the application, the cross-sectional shape of the self-locking sealing ring comprises a first edge, a second edge and a ratchet edge; the first side line, the ratchet side line and the second side line are sequentially connected, the first side line corresponds to the inner surface, the ratchet side line corresponds to the ratchet part, and the second side line corresponds to the first end surface; the angle formed by the first side line and the second side line is an acute angle, and the central angle corresponding to the ratchet side line is larger than 270 degrees.

According to an embodiment of the first aspect of the application, in the cross-sectional shape of the self-locking sealing ring, the ratchet edge comprises a ratchet edge having a ratchet centre line; along the circumferential extension direction of the ratchet side line, the ratchet central line is inclined towards the direction from the first side line to the second side line.

According to an embodiment of the first aspect of the application, in the cross-sectional shape of the self-locking sealing ring, the center of the ratchet edge is located on one side of the first edge in the positive direction of the first direction.

According to an embodiment of the first aspect of the application, in the cross-sectional shape of the self-locking sealing ring, the center of the ratchet edge is located on one side of the second edge in the positive direction of the first direction.

According to an embodiment of the first aspect of the application, the body portion further comprises: the embedded part is positioned at the outer side of the self-locking sealing ring along the radial direction of the embedded part; the embedded part comprises a first protruding part, a second protruding part and a first recessed part, and the first recessed part is positioned between the first protruding part and the second protruding part along the positive direction of the first direction; the first protruding portion and the second protruding portion extend outwards along the radial direction of the self-locking sealing ring.

According to an embodiment of the first aspect of the application, the first projection is a circular projection.

According to an embodiment of the first aspect of the present application, the cross-sectional shape of the self-locking seal ring further includes a first convex edge, a first concave edge, and a second convex edge connected in sequence; at least part of the first convex side lines are arc-shaped, and the cross section shape of the annular framework is concentric with the arc shape.

According to an embodiment of the first aspect of the application, the maximum outer diameter of the first protrusion is larger than the maximum outer diameter of the second protrusion.

In a second aspect, there is provided a patch connection tube comprising: the connecting pipe bodies comprise socket ends and spigot ends, and the spigot end of one connecting pipe body is spliced with the socket end of the adjacent connecting pipe body; the inner surface of the socket end is provided with a sealing groove; according to the self-locking sealing ring disclosed by the embodiment of the first aspect of the application, the outer surface of the socket end is provided with an annular groove; at least a portion of the thorn is embedded in the annular groove.

According to an embodiment of the second aspect of the present application, the number of the annular grooves is plural, and the annular grooves are arranged along the first direction; the annular groove is inclined toward a negative direction of the first direction.

According to an embodiment of the second aspect of the application, the socket end has a socket end face, the socket end face being oriented in a forward direction of the first direction; the joint of the outer surface of the socket end and the socket end face is provided with an arc chamfer.

According to the self-locking sealing ring and the plug-in connecting pipe provided by the embodiment of the application, the self-locking sealing ring is arranged between two mutually plug-in connecting pipe bodies, the annular body part can be embedded into the sealing groove of the socket end, the inner surface of the body part can be contacted with the outer surface of the socket end, the thorn part of the ratchet part is embedded with the annular groove of the surface of the socket end, the ratchet part is positioned at a socket pipe gap, and the surfaces of the body part and the socket end compress the self-locking sealing ring of the embodiment of the application, so that the sealing between the socket end and the socket end during plug-in connection is realized; when the two connecting pipe bodies have a disengaging trend, the ratchet part interacts with the annular groove on the surface of the socket end, so that sliding cannot be formed, the ratchet part is forced to roll on the surface of the socket end, the volume of the self-locking sealing ring between the socket end and the socket end is greatly increased by the rolling trend of the ratchet part, the compression ratio of the self-locking sealing ring is instantaneously increased until the compression limit is reached, the self-locking sealing ring cannot be compressed again, the relative movement trend generated by the two connecting pipe bodies is opposite to the inclination direction of the ratchet part, the ratchet part is overlapped with the body part, the socket end and the socket end are locked, and the two connecting pipe bodies are prevented from continuous relative movement, so that self-locking between the two connecting pipe bodies is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 is a schematic structural view of a self-locking seal ring according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of a self-locking seal in accordance with an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a plug connection pipe according to an embodiment of the application.

Fig. 4 is a cross-sectional view of a self-locking seal of an embodiment of the application between a spigot end and a socket end.

Fig. 5 is a schematic cross-sectional view of a self-locking seal ring according to an embodiment of the application.

Fig. 6 is a schematic structural diagram of a socket end of a plug connection pipe according to an embodiment of the present application.

Reference numerals:

1. self-locking sealing rings; 11. a body portion; 111. an inner surface; 112. a first end face; 12. a ratchet part; 121. a thorn part; 122. a wheel body; 13. an embedding part; 131. a first boss; 132. a first concave portion; 133. a second protruding portion; 14. an annular skeleton;

2. a connecting pipe body; 21. a socket end; 211. an annular groove; 212. arc chamfering; 22. a socket end;

l111, a first edge; l112, a second side line; l12, ratchet edge; l121, spine center line; l131, a first convex edge; l132, a first concave edge; l133, a second raised edge;

o, first direction.

Detailed Description

Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.

In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

The applicant has found that when using a connection tube, it is common to prefabricate a multi-section connection tube body. If the pipe bodies of the connecting pipes are connected in a splicing mode, one end of each section of the pipe body of the connecting pipe is a socket end, and the other end of each section of the pipe body of the connecting pipe is a socket end. The multi-section connecting pipes are sequentially spliced, wherein the socket end of one section of connecting pipe is inserted into the socket end of the adjacent connecting pipe. In order to seal the socket, a sealing ring is arranged between the spigot end and the socket end. After completing the plugging of the connection pipes, in some cases, for example, during the use of the connection pipes, it is necessary to keep the connection pipes in a plugged state, avoiding the disconnection of the connection pipes, and thus it is necessary to lock the plugged state between the two connection pipes, but it is often difficult to lock the two connection pipes only by means of the sealing rings.

In view of the above problems, the applicant proposes a self-locking seal ring and a plug connection pipe, wherein the seal ring comprises a body portion and a ratchet portion. When two connecting pipe bodies are spliced, the sealing ring is arranged at a gap between the socket end of one connecting pipe body and the socket end of the other connecting pipe body. The annular body part can be embedded into the sealing groove of the socket end, the inner surface of the body part can be in contact with the outer surface of the socket end, the thorn part of the ratchet part is embedded with the annular groove of the surface of the socket end, the ratchet part is positioned at the joint pipe gap, and the surfaces of the body part and the socket end compress the self-locking sealing ring of the embodiment of the application, so that the sealing between the socket end and the socket end is realized; when the two connecting pipe bodies have a disengaging trend, the ratchet part interacts with the annular groove on the surface of the socket end, so that sliding cannot be formed, the ratchet part is forced to roll on the surface of the socket end, the volume of the self-locking sealing ring between the socket end and the socket end is greatly increased by the rolling trend of the ratchet part, the compression ratio of the self-locking sealing ring is instantaneously increased until the compression limit is reached, the self-locking sealing ring cannot be compressed again, the relative movement trend generated by the two connecting pipe bodies is opposite to the inclination direction of the ratchet part, the ratchet part is overlapped with the body part, the socket end and the socket end are locked, and the two connecting pipe bodies are prevented from continuous relative movement, so that self-locking between the two connecting pipes is realized.

Fig. 1 is a schematic structural view of a self-locking seal ring according to an embodiment of the present application. Fig. 2 is a cross-sectional view of a self-locking seal in accordance with an embodiment of the present application. Fig. 3 is a schematic structural diagram of a plug connection pipe according to an embodiment of the application. Fig. 4 is a cross-sectional view of a self-locking seal of an embodiment of the application between a spigot end and a socket end.

Referring to fig. 1 to 4, in an embodiment of the present application, there is provided a self-locking seal ring 1, including: the annular body portion 11 includes an inner surface 111 and a first end surface 112, the diameter of the inner surface 111 gradually decreases in the positive direction of the first direction O, and the first end surface 112 is located at an end of the body portion 11 facing away from the positive direction of the first direction O; a ratchet portion 12 provided at an end portion of the inner surface 111 in the forward direction of the first direction O; the ratchet part 12 includes a wheel body 122 and a ratchet part 121; on the surface of the wheel body 122, along the direction from the inner surface 111 to the first end surface 112, the thorn part 121 is disposed on the surface of the wheel body 122 and is inclined toward the direction from the inner surface 111 to the first end surface 112.

In the embodiment of the present application, the first direction O is parallel to the axis of the self-locking seal ring 1 in the embodiment of the present application. When the self-locking sealing ring 1 of the embodiment of the application is used for connecting two connecting pipe bodies 2, the socket end 21 of one connecting pipe body 2 is inserted into the socket end 22 of the other connecting pipe body 2 along the positive direction of the first direction O. The body 11 of the self-locking sealing ring 1 of the embodiment of the application is sleeved at the socket end 21 of the connecting pipe body 2 in an annular manner and is clamped between the socket end 22 and the socket end 21. At this time, the inner surface 111 of the body 11 abuts against the outer surface of the socket end 21, and is elastically deformed. Since the diameter of the inner surface 111 gradually decreases in the positive direction of the first direction O, the degree of deformation of the body portion 11 at the first end face 112 is greater, and the radial force generated is greater. In the event of a tendency of the two connecting tube bodies 2 to move out of engagement, that is to say in the event of a tendency of the socket end 21 to move in the negative direction of the first direction O relative to the socket end 22, a greater deformation and action at the first end face 112 can advantageously hinder the relative movement of the socket end 21 and the socket end 22.

During the plugging of the two connecting tube bodies 2, the socket end 22 and the spigot end 21 are moved relative to each other, so that the ratchet portion 12 is caused to rotate in a direction from the inner surface 111 to the first end surface 112. Since the ratchet portion 121 of the ratchet portion 12 is inclined in a direction from the inner surface 111 to the first end surface 112, the ratchet portion 121 may undergo a minute deformation of further inclination, so that the socket end 22 and the spigot end 21 can be smoothly inserted. After the two connecting pipe bodies 2 are spliced, the ratchet part 12 is positioned at the gap between the socket end 22 and the spigot end 21 and is deformed to a certain extent. When the two connecting pipe bodies 2 are moved in a released manner, the socket end 22 and the spigot end 21 tend to rotate the ratchet portion 12 in a direction from the first end face 112 to the inner face 111. Since the ratchet portion 121 of the ratchet portion 12 is inclined in a direction from the inner surface 111 to the first end surface 112, the ratchet portion 12 is rotated by a certain angle in a direction opposite to the inclined direction of the ratchet portion 121. Considering that the self-locking seal ring of the embodiment of the present application is made of an elastic material, after the ratchet portion 12 rotates by a certain angle, the whole ratchet portion 12 moves toward the inner surface 111 and gradually compresses one side of the inner surface 111 of the body portion 11. Meanwhile, during the rotation of the ratchet portion 12, the theoretical total dimension of the first end surface 112 and the ratchet portion 12 in the radial direction is gradually increased, and the actual gap dimension between the socket end 21 and the spigot end 22 is fixed, so that both the first end surface 112 side of the body portion 11 and the ratchet portion 12 are gradually compressed. Therefore, when the socket end 21 and the spigot end 22 undergo relative movement with a release trend, the body portion 11 and the ratchet portion 12 of the self-locking seal ring in the embodiment of the application are compressed in the radial direction, and after the two portions are compressed, the generated radial elastic forces are superposed, so that the radial positive pressure between the self-locking seal ring in the embodiment of the application and the socket end 21 and between the self-locking seal ring and the spigot end 22 is increased, thereby greatly improving the friction force between the self-locking seal ring and the socket end 21 and between the self-locking seal ring and the spigot end 22, further preventing the socket end 21 from moving in the negative direction of the first direction O relative to the spigot end 22, and realizing self-locking of the two connecting pipe bodies 2 after the two connecting pipe bodies are spliced.

In addition, along the positive direction of the first direction O, the diameter of the inner surface 111 gradually decreases, and the inner surface 111 can form a part of a conical surface, so that the socket end 21 can be used for centering when being inserted into the spigot end 22, the width of a gap between the spigot end 22 and the socket end 21 in the circumferential direction is consistent, and the risk of failure of the self-locking sealing ring 1 due to local long-time compression is reduced.

In the embodiment of the present application, the type of the connecting pipe body 2 includes, but is not limited to, a concrete pipe, a ball-milled cast iron pipe, a Polyethylene (PE) plastic pipe, or a polyvinyl chloride (PVC) plastic pipe.

Fig. 5 is a schematic cross-sectional view of a self-locking seal ring according to an embodiment of the application.

Further, referring to fig. 5, and referring to fig. 1 to 4, the cross-sectional shape of the self-locking seal ring 1 according to the embodiment of the application includes a first edge L111, a second edge L112, and a ratchet edge L12; the first side line L111, the ratchet side line L12 and the second side line L112 are sequentially connected, wherein the first side line L111 corresponds to the inner surface 111, the ratchet side line L12 corresponds to the ratchet part 12, and the second side line L112 corresponds to the first end surface 112; the angle formed by the first side line L111 and the second side line L112 is an acute angle, and the central angle corresponding to the ratchet side line L12 is larger than 270 degrees.

The plane where the axis of the self-locking sealing ring 1 of the embodiment of the application is taken as a section, and the section shape of the embodiment of the application comprises a first side line L111, a second side line L112 and a ratchet side line L12. The inner surface 111 of the seal ring of the embodiment of the present application forms a first edge line L111 at the cross section, the first end surface 112 forms a second edge line L112 at the cross section, and the ratchet portion 12 forms a ratchet edge line L12 at the cross section. The diameter of the inner surface 111 gradually decreases in the positive direction of the first direction O, and the angle formed by the first edge line L111 and the second edge line L112 is an acute angle. The ratchet portion 12 is located at the junction of the first surface and the inner surface 111, and at the cross section, the ratchet edge L12 is not a complete 360 ° ratchet pattern, and the central angle corresponding to the ratchet edge L12 is greater than 270 °.

Further, with continued reference to fig. 1-5, in the cross-sectional shape of the self-locking seal ring 1 of the embodiment of the present application, the ratchet edge L12 comprises a ratchet edge having a ratchet center line L121; along the circumferential extending direction of the ratchet edge L12, the ratchet center line L121 is inclined toward the first edge L111 to the second edge L112.

The wheel body 122 of the ratchet wheel portion 12 corresponds to the arc portion in the ratchet wheel edge line L12, the ratchet wheel portion 121 forms a ratchet wheel edge line in cross section, and the inclined direction of the ratchet wheel can be judged by the inclined angle of the ratchet wheel center line L121 relative to the radial direction of the ratchet wheel edge line L12. The central angle of the ratchet side line L12 is larger than 270 degrees, and at the ratchet side line L12, the ratchet center line L121 is inclined towards the direction from the first side line L111 to the second side line L112.

Further, with continued reference to fig. 1 to 5, in the cross-sectional shape of the self-locking seal ring 1 according to the embodiment of the present application, the center of the ratchet edge L12 is located on one side of the first edge L111 in the positive direction of the first direction O.

When two connecting pipe bodies 2 are inserted, a part of the body part 11 is embedded into the sealing groove of the connecting pipe body 2, and a part of the first surface is tightly attached to the socket end 21. The center of the ratchet edge L12 is located at one side of the first edge L111 along the positive direction of the first direction O, so that, during the insertion of the socket end 21 into the socket end 22, a part of the ratchet thorns of the ratchet portion 12 will contact and abut with the socket end 22, and another part of the ratchet thorns will contact and abut with the socket end 21, thereby realizing self-locking after the connection pipe body 2 is inserted, and simultaneously locking the socket end 22 and the socket end 21.

Further, with continued reference to fig. 1 to 5, in the cross-sectional shape of the self-locking seal ring 1 according to the embodiment of the present application, the center of the ratchet edge L12 is located on one side of the second edge L112 in the positive direction of the first direction O.

When two connecting pipe bodies 2 are inserted, a part of the body part 11 is embedded into the sealing groove of the connecting pipe body 2, and a part of the second surface is tightly attached to the side wall of the sealing groove. The center of the ratchet edge L12 is located at one side of the second edge L112 along the positive direction of the first direction O, so that most of the ratchet portion 12 is located outside the sealing groove, that is, the ratchet portion 12 is located at the gap between the socket end 22 and the spigot end 21, a part of the ratchet portion 12 is contacted and abutted with the socket end 22, and another part of the ratchet is contacted and abutted with the spigot end 21, thereby realizing self-locking after the connecting pipe body 2 is plugged, and simultaneously locking the socket end 22 and the spigot end 21.

Further, with continued reference to fig. 1 to 4, the body portion 11 further includes: the embedded part 13 is positioned at the outer side of the self-locking sealing ring 1 along the radial direction; the embedded portion 13 includes a first convex portion 131, a second convex portion 133, and a first concave portion 132, the first concave portion 132 being located between the first convex portion 131 and the second convex portion 133 in a positive direction of the first direction O; the first and second protrusions 131 and 133 each extend outwardly in the radial direction of the self-locking seal ring 1.

The embedded part 13 of the body part 11 is positioned at the outer side of the self-locking sealing ring 1 along the radial direction of the self-locking sealing ring, and after the two connecting pipe bodies 2 are inserted, the embedded part 13 can be embedded into the sealing groove of the socket end 22. The first protruding portion 131, the second protruding portion 133 and the first recessed portion 132 are sequentially connected along the positive direction of the first direction O, and the first protruding portion 131 and the second protruding portion 133 extend outwards along the radial direction of the self-locking sealing ring 1, that is, the sealing groove can be provided with two deep grooves along the positive direction of the first direction O, the first protruding portion 131 and the second protruding portion 133 are respectively embedded into the two deep grooves, and the protruding portion between the two deep grooves is embedded into the first recessed portion 132, so that the sealing effect of the self-locking sealing ring 1 of the embodiment of the application is improved. In addition, after the two connecting pipe bodies 2 are inserted, if the socket end 22 and the spigot end 21 have a tendency to be separated, a radial and an axial acting force is generated between the first boss 131 and the sealing groove, the radial acting force can generate a moment for preventing the self-locking sealing ring 1 of the embodiment of the application from rolling, and the axial acting force can prevent the self-locking sealing ring 1 of the embodiment of the application from sliding. Therefore, the self-locking sealing ring 1 of the embodiment of the application can enable the connecting pipe body 2 to be in a self-locking state after being inserted through the embedded part 13.

Further, with continued reference to fig. 1 to 4, the self-locking seal 1 according to the embodiment of the present application further includes an annular skeleton 14 located in the first protruding portion 131.

Compared with other parts of the self-locking sealing ring 1 in the embodiment of the application, the annular framework 14 has stronger elasticity, can keep an annular state, so that the embedded part 13 can be embedded into the sealing groove, and the possibility that the self-locking sealing ring 1 in the embodiment of the application slides out of the sealing groove is reduced.

Further, with continued reference to fig. 1 to 5, the cross-sectional shape of the self-locking seal ring 1 according to the embodiment of the present application further includes a first convex edge L131, a first concave edge L132, and a second convex edge L133 that are sequentially connected; at least part of the first convex side line L131 is in a circular arc shape, and the cross section shape of the annular skeleton 14 is concentric with the circular arc shape.

The cross section of the self-locking sealing ring 1 in the embodiment of the application further comprises a first convex side line L131, a first concave side line L132 and a second convex side line L133 which are sequentially connected. The first convex portion 131 forms a first convex edge L131 in cross section, the first concave portion 132 forms a first concave edge L132 in cross section, and the second convex portion 133 forms a second convex edge L133 in cross section. At least part of the first protruding edge line L131 is in a circular arc shape, and the cross section shape of the annular framework 14 is concentrically arranged with the circular arc shape, so that the annular framework 14 can press the first protruding portion 131 into the sealing ring, the acting forces corresponding to all positions of the first protruding edge line L131 are the same, and the sealing effect of the self-locking sealing ring 1 at the first protruding portion 131 can be improved.

Further, with continued reference to fig. 1-5, the maximum outer diameter of the first lobe 131 is greater than the maximum outer diameter of the second lobe 133. When the spigot end 21 is inserted into the socket end 22, since the maximum outer diameter of the first protruding portion 131 is larger than the maximum outer diameter of the second protruding portion 133, a larger moment can be generated between the acting force of the second protruding portion 133 and the sealing groove relative to the maximum outer diameter of the first protruding portion 131, so that the self-locking sealing ring 1 of the embodiment of the application is prevented from rolling, and the possibility that the sealing ring of the embodiment of the application rolls out of the sealing groove is reduced.

The embodiment of the application also provides a plug-in connection pipe, which comprises the following components: a plurality of connecting pipe bodies 2, wherein the connecting pipe bodies 2 comprise a bell end 22 and a spigot end 21, and the spigot end 21 of one connecting pipe body 2 is spliced with the bell end 22 of the adjacent connecting pipe body 2; the inner surface 111 of the socket end 22 is provided with a sealing groove; the self-locking sealing ring 1 of the embodiment of the application is positioned at the splicing position of two adjacent connecting pipe bodies 2, and at least part of the self-locking sealing ring 1 is embedded into the sealing groove.

With continued reference to fig. 3, in the embodiment of the present application, two adjacent connecting pipe bodies 2 are inserted, and when inserted, the self-locking sealing ring 1 of the previous embodiment of the present application is used for sealing and self-locking. When two adjacent connecting pipe bodies 2 are spliced, the socket end 21 of one connecting pipe body 2 is inserted into the spigot end 22 of the other connecting pipe body 2 along the forward direction of the first direction O, the inner surface 111 of the spigot end 22 is provided with a sealing groove, at least part of the self-locking sealing ring 1 is embedded into the sealing groove, the inner surface 111 of the self-locking sealing groove is abutted with the socket end 21 to realize the sealing between the two connecting pipe bodies 2, the ratchet part 12 is clamped on the inner surface 111 of the spigot end 22 and the outer surface of the socket end 21, when the socket end 21 and the spigot end 22 are subjected to relative movement with a disconnecting trend, the body part 11 and the ratchet part 12 of the self-locking sealing ring are compressed in the radial direction, and the radial elastic force generated after the socket end 21 and the ratchet part are compressed is superposed, so that the radial positive pressure between the self-locking sealing ring and the socket end 21 and the spigot end 22 of the self-locking sealing ring disclosed by the embodiment of the application is increased, the friction force between the self-locking sealing ring and the socket end 21 and the socket end 22 is greatly improved, and the friction force between the socket end 21 and the socket end 22 is further prevented from moving in the negative direction relative to the spigot end 22 along the first direction O, and the self-locking is realized after the two connecting pipe bodies 2 are spliced. The connection pipe body 2 may be a concrete pipe, a ball-milled cast iron pipe, a Polyethylene (PE) plastic pipe, or a polyvinyl chloride (PVC) plastic pipe, for example.

Fig. 6 is a schematic structural diagram of a socket end of a plug connection pipe according to an embodiment of the present application.

Further, referring to fig. 6 in combination with fig. 3, the outer surface of the socket end 21 is provided with a plurality of annular grooves 211 arranged along the first direction; the annular groove 211 is inclined in a negative direction of the first direction O.

During insertion of the spigot end 21 into the socket end 22, the outer surface of the spigot end 21 will contact the ratchet portion 12 of the self-locking seal ring 1, and the ratchet portion 121 of the ratchet portion 12 will be inserted into the annular groove 211 of the spigot end 21. Since the annular groove 211 is inclined in the negative direction of the first direction O, a part of the ratchet portion 121 of the ratchet portion 12 can be fitted into the annular groove 211. When the connecting pipe body 2 receives an axial external force, the socket end 21 moves towards the opposite direction of the first direction O relative to the self-locking sealing ring 1, the thorn part 121 interacts with the annular groove 211 on the surface of the socket end 21, sliding cannot be formed, the ratchet part 121 is forced to present a rolling trend on the surface of the socket end 21, the rolling trend of the ratchet part 121 greatly enlarges the volume of the self-locking sealing ring between the socket end 22 and the socket end 21, the compression ratio of the self-locking sealing ring is instantaneously increased until reaching a compression limit and cannot be compressed any more, the relative movement trend generated by the two connecting pipe bodies 2 is opposite to the inclination direction of the thorn part 121, the thorn part 121 is overlapped with the body part 11, the socket end 22 and the socket end 21 are locked, the two connecting pipe bodies 2 are blocked from generating continuous relative movement, and the self-locking capability of the connecting pipe of the embodiment of the application can be improved.

Further, with continued reference to fig. 3 and 6, the socket end 21 has a socket end face that faces in a forward direction in the first direction; the junction of the outer surface of the socket end and the socket end face is provided with a circular arc chamfer 212.

In the process of inserting the spigot end 21 into the socket end 22, the arc chamfer 212 formed by the outer surface of the spigot end 21 and the spigot end surface is firstly contacted with the inner surface 111 of the self-locking sealing ring 1 and plays a role in guiding and centering together with the self-locking sealing ring 1, so that the socket end 22, the self-locking sealing ring 1 and the spigot end 21 can be coaxially arranged. The radius of the circular arc chamfer 212 may be greater than the radial depth of the annular groove 211. When the circular arc chamfer 212 reaches the position of the ratchet portion 12, since the radius of the circular arc chamfer 212 may be greater than the radial depth of the annular groove 211, the socket end face does not directly abut against the ratchet portion 121, thereby reducing the likelihood that the socket end 21 will eject the self-locking seal ring 1 from the seal groove of the socket end 22 when the socket end 21 is inserted.

In summary, the embodiment of the application provides a self-locking sealing ring and an inserted connection pipe.

The self-locking sealing ring is arranged between two mutually-spliced connecting pipe bodies, the annular body part can be embedded into the sealing groove of the socket end, the inner surface of the body part can be in contact with the outer surface of the socket end, the thorn part of the ratchet part is embedded with the annular groove on the surface of the socket end, the ratchet part is positioned at a socket pipe gap, and the surfaces of the body part and the socket end compress the self-locking sealing ring in the embodiment of the application, so that the sealing between the socket end and the socket end is realized; when the two connecting pipe bodies have a disengaging trend, the ratchet part interacts with the annular groove on the surface of the socket end, so that sliding cannot be formed, the ratchet part is forced to roll on the surface of the socket end, the volume of the self-locking sealing ring between the socket end and the socket end is greatly increased by the rolling trend of the ratchet part, the compression ratio of the self-locking sealing ring is instantaneously increased until the compression limit is reached, the self-locking sealing ring cannot be compressed again, the relative movement trend generated by the two connecting pipe bodies is opposite to the inclination direction of the ratchet part, the ratchet part is overlapped with the body part, the socket end and the socket end are locked, and the two connecting pipe bodies are prevented from continuous relative movement, so that self-locking between the two connecting pipe bodies is realized.

While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (12)

1. The auto-lock sealing washer, its characterized in that includes:

an annular body portion including an inner surface and a first end surface, the inner surface gradually decreasing in diameter in a forward direction of a first direction, the first end surface being located at an end of the body portion facing away from the forward direction of the first direction;

a ratchet part provided at an end of the inner surface in a positive direction of the first direction; the ratchet wheel part comprises a wheel body part and a thorn part; the ratchet part is arranged on the surface of the wheel body along the direction from the inner surface to the first end face, and inclines towards the direction from the inner surface to the first end face.

2. The self-locking seal of claim 1, wherein the cross-sectional shape of the self-locking seal comprises a first edge, a second edge, and a ratchet edge; the first side line, the ratchet side line and the second side line are sequentially connected, the first side line corresponds to the inner surface, the ratchet side line corresponds to the ratchet part, and the second side line corresponds to the first end face; the angle formed by the first side line and the second side line is an acute angle, and the central angle corresponding to the ratchet side line is larger than 270 degrees.

3. The self-locking seal of claim 2, wherein in a cross-sectional shape of the self-locking seal, the ratchet edge comprises a ratchet edge having a ratchet centerline; the ratchet center line is inclined towards the direction from the first side line to the second side line along the circumferential extension direction of the ratchet side line.

4. The self-locking seal of claim 2, wherein in a cross-sectional shape of the self-locking seal, a center of the ratchet edge is located on a side of the first edge in a positive direction of the first direction.

5. The self-locking seal of claim 2, wherein in a cross-sectional shape of the self-locking seal, a center of the ratchet edge is located on a side of the second edge in a positive direction of the first direction.

6. The self-locking seal of claim 1, wherein the body portion further comprises: the embedded part is positioned at the outer side of the self-locking sealing ring along the radial direction of the embedded part; the embedded part comprises a first protruding part, a second protruding part and a first recessed part, and the first recessed part is positioned between the first protruding part and the second protruding part along the positive direction of the first direction; the first protruding portion and the second protruding portion extend outwards along the radial direction of the self-locking sealing ring.

7. The self-locking seal of claim 6, further comprising an annular skeleton positioned within the first boss.

8. The self-locking seal of claim 7, wherein the cross-sectional shape of the self-locking seal further comprises a first raised edge, a first recessed edge, and a second raised edge connected in sequence; at least part of the first convex side lines are arc-shaped, and the cross section shape of the annular framework is concentric with the arc shape.

9. The self-locking seal of claim 6, wherein the maximum outer diameter of the first boss is greater than the maximum outer diameter of the second boss.

10. A plug connection tube, comprising:

the connecting pipe bodies comprise socket ends and spigot ends, wherein the spigot end of one connecting pipe body is spliced with the socket end of the adjacent connecting pipe body; the inner surface of the socket end is provided with a sealing groove;

the self-locking sealing ring according to any one of claims 1 to 9, which is positioned at the splicing position of two adjacent connecting pipe bodies, wherein at least part of the self-locking sealing ring is embedded into the sealing groove; the outer surface of the socket end is provided with an annular groove; at least a portion of the thorn is embedded in the annular groove.

11. The patch connection tube of claim 10, wherein the number of annular grooves is a plurality, aligned in the first direction; the annular groove is inclined toward a negative direction of the first direction.

12. The patch connection tube of claim 11, wherein the socket end has a socket end face, the socket end face facing in a forward direction of the first direction; and an arc chamfer is arranged at the joint of the outer surface of the socket end and the socket end face.