阅读说明：本技术 混凝土管及混凝土管的管体模具 (Concrete pipe and pipe body mould thereof ) 是由 郝百顺 于 2021-09-03 设计创作，主要内容包括：本申请公开了一种混凝土管及混凝土管的管体模具。混凝土管包括：沿第一方向延伸的管体,包括承口端和内壁面,承口端位于管体沿第一方向的端部,内壁面设有密封槽；密封圈,位于密封槽内,包括定位部、密封本体和刚性骨架,密封本体为环形结构,至少部分的密封本体与密封槽的一部分耦合,至少部分的密封本体相对管体的内壁面凸出,定位部沿密封本体的周向设置,定位部与密封槽的一部分耦合,刚性骨架沿密封本体的周向设置于定位部的内部,刚性骨架位于密封槽形成的空间内；定位部沿背离密封圈的中心的方向延伸,密封本体沿朝向密封圈中心的方向延伸,且密封本体的延伸方向第一方向的反方向倾斜。本申请的混凝土管能够降低密封圈滚动的可能性。(The application discloses concrete pipe and body mould of concrete pipe. The concrete pipe includes: the pipe body extending along the first direction comprises a female end and an inner wall surface, the female end is positioned at the end part of the pipe body along the first direction, and a sealing groove is formed in the inner wall surface; the sealing ring is positioned in the sealing groove and comprises a positioning part, a sealing body and a rigid framework, wherein the sealing body is of an annular structure, at least part of the sealing body is coupled with one part of the sealing groove, at least part of the sealing body protrudes relative to the inner wall surface of the pipe body, the positioning part is arranged along the circumferential direction of the sealing body and is coupled with one part of the sealing groove, the rigid framework is arranged in the positioning part along the circumferential direction of the sealing body, and the rigid framework is positioned in a space formed by the sealing groove; the locating part extends along the direction of deviating from the center of the sealing ring, the sealing body extends along the direction of facing the center of the sealing ring, and the extending direction of the sealing body is inclined in the direction opposite to the first direction. The concrete pipe of this application can reduce the rolling possibility of sealing washer.)

1. A concrete pipe, comprising:

the pipe body extends along a first direction, the pipe body comprises a female end and an inner wall surface, the female end is positioned at the end part of the pipe body along the first direction, and a sealing groove is formed in the inner wall surface;

the sealing ring is positioned in the sealing groove and comprises a positioning part, a sealing body and a rigid framework, the sealing body is of an annular structure, at least part of the sealing body is coupled with one part of the sealing groove, at least part of the sealing body protrudes relative to the inner wall surface of the pipe body, the positioning part is arranged along the circumferential direction of the sealing body, the positioning part is coupled with one part of the sealing groove, the rigid framework is arranged in the positioning part along the circumferential direction of the sealing body, and the rigid framework is positioned in a space formed by the sealing groove;

the positioning portion extends in a direction departing from the center of the sealing ring, the sealing body extends in a direction facing the center of the sealing ring, and the extending direction of the sealing body is inclined in a direction opposite to the first direction.

2. The concrete pipe according to claim 1, wherein the cross-sectional shape of the positioning portion includes a first side, a second side and a third side connected in series, the first side being parallel to the third side, the second side being a convex arc, the second side being tangent to the first side, the second side intersecting the third side; the distance from the point of the second edge to the center of the positioning part is greater than or equal to the distance from the point of the first edge to the center of the positioning part; the second edge is positioned on the same side of the straight line where the third edge is positioned.

3. The concrete pipe according to claim 2 wherein the cross-section of the sealing body includes a fourth edge, a fifth edge and a sixth edge connected in series, the fourth edge being connected to the third edge and the fourth edge being inclined relative to the third edge toward a side away from the first edge, the fifth edge being a convex arc, the fifth edge being tangent to the fourth edge, the sixth edge being connected to both the fifth edge and the first edge and the sixth edge being inclined relative to the first edge toward a direction proximal to the third edge.

4. The concrete pipe of claim 3 wherein the third side is perpendicular to the fourth side, and the sixth side forms an obtuse angle with the first side.

5. The concrete pipe of claim 4, wherein the sealing groove comprises a first sub-groove and a second sub-groove that communicate and extend in a direction away from a center of the seal ring, the first sub-groove being coupled with the locating portion, the second sub-groove being coupled with a portion of the seal body; the depth of the second subslot gradually decreases or remains constant in a direction away from the first subslot.

6. The concrete pipe of claim 1 wherein the inner wall surface includes a tapered section extending to the female end, the tapered section increasing in cross-sectional dimension in the first direction.

7. The concrete pipe according to claim 1, wherein the number of the pipe bodies is at least two, and at least two pipe bodies are sequentially inserted;

the pipe body also comprises a socket end, and the socket end is positioned at the end part of the pipe body along the direction opposite to the first direction; in the two pipe bodies which are inserted, the socket end of one pipe body is inserted into the socket end of the other pipe body, and the sealing body of the sealing ring in the socket end is abutted to the socket end.

8. The concrete pipe according to claim 7, wherein the spigot end is provided with a chamfer structure on the outside, and the chamfer structure has a dimension in the radial direction of the pipe body of 5-15% of the thickness of the pipe body.

9. A pipe body mold for forming a pipe body of a concrete pipe according to any one of claims 1 to 8, comprising:

the annular first mold comprises a first molding part, a second molding part and a mold framework, wherein the cross section of the first molding part is the same as that of the positioning part of the sealing ring, the cross section of the second molding part is the same as that of the sealing body of at least part of the sealing ring, the first molding part extends along the direction deviating from the center of the first mold, the extending direction of the second molding part extends along the direction vertical to the plane where the first mold is located, and the mold framework is annular and is located in the first molding part.

10. A pipe body mould for concrete pipes according to claim 9, characterized in that said first mould further comprises a locking male and a locking female, said locking female and said locking male being coupled, said locking female and said locking male being detachably hooked.

Technical Field

The application relates to the technical field of concrete pipe connection, in particular to a concrete pipe and a pipe body die of the concrete pipe.

Background

When two concrete pipes are spliced together, a sealing ring is usually provided to ensure that the spliced position of the concrete pipes is well sealed. When in insertion, the sealing ring is sleeved outside the socket end and is inserted into the socket end together. Under the combined action of the socket end and the socket end, the sealing ring can roll between the socket end and even slide out of a limiting step of the sealing groove, so that sealing failure is caused.

Disclosure of Invention

The embodiment of the application provides a body mould of concrete pipe and concrete pipe can be with the sealing washer restriction in the seal groove to reduce the sealing washer roll, follow the spacing step of seal groove in the possibility of roll-off, improve the sealing reliability of concrete pipe.

In a first aspect, an embodiment of the present application provides a concrete pipe, including: the pipe body extends along a first direction, the pipe body comprises a female end and an inner wall surface, the female end is positioned at the end part of the pipe body along the first direction, and the inner wall surface is provided with a sealing groove; the sealing ring is positioned in the sealing groove and comprises a positioning part, a sealing body and a rigid framework, the sealing body is of an annular structure, at least part of the sealing body is coupled with one part of the sealing groove, at least part of the sealing body protrudes relative to the inner wall surface of the pipe body, the positioning part is arranged along the circumferential direction of the sealing body and is coupled with one part of the sealing groove, the rigid framework is arranged in the positioning part along the circumferential direction of the sealing body, and the rigid framework is positioned in a space formed by the sealing groove; wherein, location portion extends along the direction that deviates from the center of sealing washer, and sealed body extends along the direction towards the sealing washer center, and the opposite direction slope of the first direction of the extending direction of sealed body.

According to the first aspect, the cross-sectional shape of the positioning portion includes a first edge, a second edge and a third edge which are connected in sequence, the first edge is parallel to the third edge, the second edge is a convex arc line, the second edge is tangent to the first edge, and the second edge is intersected with the third edge; the distance from the point of the second side to the center of the positioning portion is greater than or equal to the distance from the point of the first side to the center of the positioning portion.

According to a first aspect, the second edge is located on the same side of the straight line as the third edge.

According to the first aspect, the cross section of the sealing body includes a fourth edge, a fifth edge and a sixth edge that are connected in sequence, the fourth edge is connected with the third edge, the fourth edge inclines towards one side that deviates from the first edge relative to the third edge, the fifth edge is an arc line that protrudes outwards, the fifth edge is tangent to the fourth edge, the sixth edge is connected with both the fifth edge and the first edge, and the sixth edge inclines towards the direction that is close to the third edge relative to the first edge.

According to a first aspect, the third side is perpendicular to the fourth side, and the sixth side forms an obtuse angle with the first side.

According to a first aspect, the sealing groove comprises a first subslot and a second subslot that are in communication and extend in a direction away from a center of the seal ring, the first subslot being coupled with the locating portion, the second subslot being coupled with a portion of the seal body; the depth of the second subslot gradually decreases or remains constant in a direction away from the first subslot.

According to a first aspect, the inner wall surface includes a tapered section extending to the female end, the tapered section gradually increasing in cross-sectional dimension in the first direction.

According to the first aspect, the pipe comprises a socket end, the socket end is located at the end part of the pipe body in the opposite direction of the first direction, a chamfer structure is arranged on the outer side of the socket end, and the radial size of the chamfer structure along the pipe body is 5% -15% of the thickness of the pipe body.

According to the first aspect, the number of the tube bodies is at least two, and the at least two tube bodies are sequentially inserted;

in the two pipe bodies which are connected in an inserting mode, the socket end of one pipe body is inserted into the socket end of the other pipe body, and the sealing body of the sealing ring in the socket end is abutted to the socket end.

In a second aspect, an embodiment of the present application provides a pipe body mold for forming a pipe body of a concrete pipe in the first aspect, including: annular first mould, including first shaping portion, second shaping portion and mould skeleton, the cross section of first shaping portion is the same with the cross section of the location portion of sealing washer, and the cross section of second shaping portion is the same with the cross section of the sealing body of at least partial sealing washer, and first shaping portion extends along the direction that deviates from the center of first mould, and the extending direction of second shaping portion extends with the perpendicular direction in first mould place plane, and the mould skeleton is the annular, and is located first shaping portion.

In the concrete pipe and the pipe body mould of concrete pipe that this application embodiment provided, set up the seal groove in the inboard of the female end of body. The sealing ring is provided with a rigid framework, and the sealing ring can be tightly attached to the sealing groove by using the tension of the rigid framework, so that the aim of sealing the outer edge of the sealing ring and the inner wall of the clamping groove is fulfilled. The extending directions of the positioning part and the sealing body of the sealing ring are mutually inclined, and the sealing groove is coupled with the positioning part and part of the sealing body, so that the relative position between the sealing ring and the sealing groove can be limited. When the socket end of another body is inserted, can will extrude location portion and sealed body, make the angle that the two formed diminish, the reaction force of production can prevent that the sealing washer from rolling, displacement, can also prevent from the roll-off in the spacing step of seal groove.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a concrete pipe according to an embodiment of the present application.

Fig. 2 is a side view of a concrete pipe according to an embodiment of the present application.

Fig. 3 is a cross-sectional view of an a-a interface of the concrete pipe of the embodiment of the present application shown in fig. 2.

Fig. 4 is an enlarged view of a region a of the concrete pipe of the embodiment of the present application shown in fig. 3.

Fig. 5 is a schematic cross-sectional view of a packing of a concrete pipe according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a seal groove of a pipe body of a concrete pipe according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of the concrete pipe connected to another pipeline according to the embodiment of the present invention.

Fig. 8 is a schematic structural diagram illustrating the insertion of two pipe bodies of the concrete pipe according to the embodiment of the present application.

Fig. 9 is a cross-sectional view of the B-B interface of the concrete pipe shown in fig. 8.

Fig. 10 is a partially enlarged view of a region B of the concrete pipe shown in fig. 9.

Fig. 11 is a schematic view of an internal structure of a pipe body mold for a concrete pipe according to an embodiment of the present invention.

Fig. 12 is a schematic cross-sectional view of a first mold of a pipe body mold for a concrete pipe according to an embodiment of the present application.

Fig. 13 is a schematic structural view of a locking male and female of the first mold according to the embodiment of the present application.

Reference numerals:

1. a pipe body; 11. a female end; 12. a socket end; 13. a sealing groove; 131. a first subslot; 132. a second subslot; 133. a first slot edge; 134. a second slot edge; 135. a third slot edge; 136. a fourth slot edge; 137. a fifth slot edge; 14. an inner wall surface;

2. a seal ring; 21. a positioning part; 211. a first side; 212. a second edge; 213. a third side; 22. a seal body; 221. a fourth side; 222. a fifth side; 223. a sixth side; 23. a rigid skeleton;

3. a first mold; 31. a first molding section; 311. a first die edge; 312. a second die edge; 313. a third mould edge; 32. a second molding section; 321. a fourth die edge; 322. fifth mould edge; 323. a sixth die edge; 33. a mold framework; 34. locking the male buckle; 35. locking the female buckle;

x, the first direction.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present 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 present application by illustrating examples thereof.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. 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. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

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

When the concrete pipe is manufactured, a section of pipe body is formed by pouring, wherein one end of the pipe body is a socket end, and the other end of the pipe body is a socket end. The plurality of pipe bodies can be inserted together, so that the socket end of one pipe body is inserted into the socket end of the other pipe body, and meanwhile, the sealing is carried out through the sealing ring. When the pipe body of the concrete pipe is poured, the outer side of the spigot end is provided with a sealing ring limiting step. When the two pipe bodies are connected in an inserting mode, the sealing ring sleeve is arranged at the socket end with the limiting step, the socket end with the sealing ring of one pipe body is inserted into the socket end of the other pipe body, and the pipe bodies are connected in an inserting mode.

The applicant has found that, during plugging, the relative movement between the female end and the female end causes the seal to roll, since the seal is generally circular in cross-section, forming a cylindrical or conical shape. When the sealing ring is inserted, the sealing ring with elastic elongation performance can cross the limiting step under the reaction force of the socket end and cannot enter the socket according to the preset value. If the sealing ring crosses the limit step, the sealing failure can be caused. In addition, if the sealing ring rolls, the sealing ring is in a spiral tightening state, the sealing ring can be damaged, and the sealing ring can not be tightly attached to the inner wall and the outer wall of the bearing end and the inserting end even if the sealing ring is not damaged, so that the sealing failure of the concrete pipe is caused. In addition, even if the sealing ring does not roll, when the sealing ring is inserted, the sealing ring and the inner wall of the female end generate shearing acting force, so that the sealing ring is subjected to acting force applied by the inner wall of the female end and towards the female end. Resulting in seal ring damage or partial damage and seal ring failure. In actual construction, the traditional concrete bell and spigot pipe sealing mode has high probability of sealing failure.

In view of the above analysis, the applicant proposes a concrete pipe and a pipe body mold for the concrete pipe, wherein the pipe body mold is formed by additionally installing a mold for forming a female end sealing ring clamping groove on the basis of a mold of the related art, modifying a mold for forming a step at a female end, and arranging a sealing groove on the inner side of the female end of the pipe body. The rigid framework is arranged in the sealing ring, so that the sealing ring can be kept in the sealing groove, and the outer edge of the positioning part of the sealing ring is tightly attached to the inner edge of the sealing groove under the tension action of the rigid framework so as to achieve the first sealing of the sealing ring and the socket end. The positioning part of the sealing ring and one part of the sealing body are coupled with the sealing groove, so that the relative position of the sealing ring and the sealing groove can be further limited, and the possibility of stopping the rolling of the sealing ring is greatly reduced. In addition, the extending directions of the sealing ring and the positioning part are mutually inclined, so that the cross section of the sealing ring is bent. When the connected object end is inserted into the sealing ring, the positioning part and the sealing body are extruded, the angle formed by the positioning part and the sealing body is reduced, and the generated reaction force can be further fixed in the clamping groove.

Fig. 1 is a schematic structural view of a concrete pipe according to an embodiment of the present application. Fig. 2 is a side view of a concrete pipe according to an embodiment of the present application. Fig. 3 is a cross-sectional view of an a-a interface of the concrete pipe of the embodiment of the present application shown in fig. 2. Fig. 4 is an enlarged view of a region a of the concrete pipe of the embodiment of the present application shown in fig. 3.

Referring to fig. 1 to 4, an embodiment of the present application provides a concrete pipe including: at least one tubular body 1 extending in a first direction X and at least one sealing ring 2. The pipe body 1 includes a female end 11 and an inner wall surface, the female end 11 is located at an end of the pipe body 1 along the first direction X, and the inner wall surface 14 is provided with a sealing groove 13. The sealing ring 2 is located in the sealing groove 13, the sealing ring 2 comprises a positioning portion 21, a sealing body 22 and a closed rigid framework 23, the sealing body 22 is of an annular structure, at least part of the sealing body 22 is coupled with one part of the sealing groove 13, at least part of the sealing body 22 protrudes relative to the inner wall surface 14 of the pipe body 1, the positioning portion 21 is arranged along the circumferential direction of the sealing body 22, the positioning portion 21 is coupled with one part of the sealing groove 13, the rigid framework 23 is arranged inside the positioning portion 21 along the circumferential direction of the sealing body 22, and the closed rigid framework 23 is located in a space formed by the sealing groove 13. The positioning portion 21 extends in a direction away from the center of the gasket 2, the sealing body 22 extends in a direction toward the center of the gasket 2, and the extending direction of the sealing body 22 is inclined in a direction opposite to the first direction X.

With continued reference to fig. 3 and 4, the seal ring 2 is disposed in the seal groove 13 of the inner wall surface 14 of the female end 11, and when a connected object is inserted into the female end 11, the connected object exerts a force on the seal ring 2 in the direction opposite to the first direction X. The direction of the acting force is opposite to the direction of the pressure applied to the sealing ring 2 by the fluid in the concrete pipe, and the acting force and the pressure are mutually superposed, so that the possibility of failure of the sealing ring 2 is reduced, and the sealing effect is enhanced.

With continued reference to fig. 3 and 4, the positioning portion 21 serves to reduce the risk of the sealing ring 2 rolling out of the sealing groove 13, and the sealing body 22 serves to perform the sealing function of the sealing ring 2. The positioning portion 21 and the seal body 22 are integrally formed. The shape of the gasket 2 may be circular or may be designed according to the cross-sectional shape of the concrete pipe. In the present embodiment, the cross-sectional shape of the concrete pipe is described as a circle, and in this case, the seal ring 2 is a circular ring.

With continued reference to fig. 3 and 4, the positioning portion 21 is coupled to a portion of the seal groove 13, and the positioning portion 21 can clamp the seal ring 2 in the seal groove 13, thereby reducing the possibility that the seal ring 2 rolls out of the seal groove 13. The rigid framework 23 is arranged in the positioning part 21 of the sealing ring 2, so that the closed sealing ring 2 can be supported in a tension manner, the sealing ring 2 can be kept in an annular shape, and the risk that the positioning part 21 slides out of the sealing groove 13 is reduced. The rigid framework 23 is arranged in the positioning portion 21, the sealing ring 2 is arranged in the sealing groove 13, the rigid framework 23 is located in the area corresponding to the sealing groove 13, the positioning portion and the sealing groove 13 are compressed by the tension of the sealing ring 2, sealing of the sealing ring 2 and the socket end 11 is achieved, interference caused by elastic deformation of the sealing body 22 by the rigid framework 23 can be prevented, and the sealing body 22 is guaranteed to have a good sealing effect.

A part of the sealing body 22 is coupled with a part of the sealing groove 13, and the positioning part and the sealing groove 13 can be pressed by using the tension of the sealing ring 2, so that the sealing between the sealing ring 2 and the socket end 11 is realized, and the sealing performance between the sealing ring 2 and the sealing groove 13 is enhanced. Furthermore, it may also be used to define the relative position between the sealing ring 2 and the sealing groove 13.

With continued reference to fig. 3 and 4, the positioning portion 21 extends in a direction away from the center of the seal ring 2, i.e., the positioning portion 21 extends outward in the radial direction of the seal ring 2, and the radius of the positioning portion 21 relative to the center of the seal ring 2 is larger than the radius of the seal body 22. Exemplarily, the positioning part 21 may form a circular ring-shaped sheet structure. Therefore, the positioning portion 21 is fitted into the seal groove 13, and the seal ring 2 can be prevented from moving relative to the seal groove 13 in the axial direction of the seal ring 2, that is, from being hindered from moving in the first direction X and the direction opposite to the first direction X. The sealing body 22 extends in a direction toward the center of the gasket 2, and the extending direction of the sealing body 22 is inclined from the female end 11 to the female end 12. Illustratively, the sealing body 22 forms a circular truncated-cone-shaped annular structure and forms an integral structure with the circular annular sheet-like structure formed by the positioning portion 21. That is, the cross-sectional shape of the seal ring 2 is a bent shape, and the cross-sectional shape of the positioning portion 21 and the cross-sectional shape of the seal body 22 correspond to opposite bent sides of the bent shape, respectively. Since the extending direction of the sealing body 22 is inclined in the direction opposite to the first direction X, when the female end 11 is inserted into the connected object, the inclined sealing body 22 cooperates with the end surface of the connected object to reduce the shearing risk of the inserted object to the sealing ring 2. And also facilitates the insertion of the connected object. The connected object presses the sealing body 22 to tightly press the sealing body 22 and the sealing groove 13, so as to realize socket and spigot sealing, the acting force generated by the elasticity of the sealing ring 2 can act between the positioning part 21 and the sealing groove 13, and the moment generated by the reaction force of the sealing groove 13 on the positioning part 21 can block the sealing ring 2 from rolling, so that the risk that the sealing ring 2 rolls out of the sealing groove 13 is reduced. Further, when a fluid is present in the concrete pipe, the pressure of the fluid acting on the sealing body 22 presses the sealing body 22 toward the connected object, so that the sealing performance can be enhanced.

The seal body 22 and the positioning portion 21 are of an integral structure, and the seal ring 2 can be regarded as an annular structure formed by a circular sweep corresponding to the cross section of the seal body.

Fig. 5 is a schematic cross-sectional view of a packing of a concrete pipe according to an embodiment of the present invention.

Further, the cross-sectional shape of the positioning portion 21 includes a first side 211, a second side 212 and a third side 213 connected in sequence, the first side 211 is parallel to the third side 213, the second side 212 is a convex arc, the second side 212 is tangent to the first side 211, and the second side 212 intersects the third side 213; the distance from the point of the second side 212 to the center of the positioning portion 21 is greater than or equal to the distance from the point of the first side 211 to the center of the positioning portion 21. The cross-section of the sealing body 22 includes a fourth side 221, a fifth side 222 and a sixth side 223 connected in sequence, the fourth side 221 is connected with the third side 213, and the fourth side 221 is inclined towards the side away from the first side 211 relative to the third side 213, the fifth side 222 is a convex arc, the fifth side 222 is tangent to the fourth side 221, the sixth side 223 is connected with both the fifth side 222 and the first side 211, and the sixth side 223 is inclined towards the direction close to the third side 213 relative to the first side 211.

The first side 211, the second side 212, the third side 213, the fourth side 221, the fifth side 222, and the sixth side 223 form a closed shape, i.e., a cross-sectional shape of the seal ring 2. The first side 211 and the third side 213 are parallel to the extending direction of the positioning portion 21. Illustratively, the first side 211 and the third side 213 may be parallel to a radial direction of the sealing ring 2. The second side 212 is a convex arc, and the second side 212 may be a circular arc, for example. The first side 211, the second side 212, and the third side 213 form a shape extending radially outward along the seal ring 2, so that the positioning portion 21 can extend radially outward along the seal ring 2. The fourth edge 221 is inclined with respect to the third edge 213 toward a side away from the first edge 211, and illustratively, the fourth edge 221 may be perpendicular to the third edge 213. The sixth side 223 is inclined with respect to the first side 211 in a direction close to the third side 213, and the sixth side 223 may be inclined with respect to both the first side 211 and the fourth side 221. The fifth side 222 is a convex arc line, and the fifth side 222 may be a circular arc, for example. The fourth side 221, the fifth side 222, and the sixth side 223 are shaped to extend radially inward of the seal ring 2, such that the seal body 22 extends radially inward of the seal ring 2. When the seal ring 2 is installed in the seal groove 13, the first side 211 is closer to the female end 11 than the third side 213, so that the extending direction of the seal body 22 is inclined in a direction away from the first side 211. The first edge 211 is tangent to the second edge 212, so that the shearing force generated at the joint of the first edge 211 and the second edge 212 can be reduced, the stress concentration phenomenon can be weakened, and the service life of the sealing ring 2 can be prolonged. When the object to be connected is inserted into the female end 11 and the seal body 22 is pressed, the third edge 213 is inclined with respect to the second edge 212, so that the angle formed by the two edges is slightly reduced, the seal body 22 is pressed against the object to be connected and the positioning portion 21 is pressed in the seal groove 13 under the action of the elasticity of the seal ring 2 itself, and the seal ring 2 is prevented from rolling out of the seal groove 13 by the reaction force applied by the seal groove 13. The sixth side 223 inclined in the opposite direction of the first direction X is advantageous for smooth insertion of the object to be connected and alignment of insertion of the object to be connected. After the inserted object is inserted into the tube 1, the fluid in the tube 1 applies pressure to the fifth side 222 to press the sealing body 22 against the connected object, thereby improving the sealing effect. The second edge 212 is located on the same side of the straight line where the third edge 213 is located, so that in the cross-sectional shape of the seal ring 2, the portion corresponding to the positioning portion 21 is located between the first edge 211 and the third edge 213, and thus the positioning portion 21 can be smoothly inserted into the seal groove 13, which facilitates the installation of the seal ring 2.

With continued reference to fig. 5, the third side 213 is perpendicular to the fourth side 221, and the angle between the sixth side 223 and the first side 211 is obtuse. Since the positioning portion 21 is coupled to a portion of the seal groove 13 and a portion of the seal body 22 is coupled to a portion of the seal groove 13, portions of the seal ring 2 corresponding to the third edge 213 and the fourth edge 221 are located in the seal groove 13. When the object to be connected is inserted into the socket end 11, the seal body 22 receives a shearing force in the direction opposite to the first direction X, and at the same time, the seal groove 13 applies a supporting force in the first direction X to the first edge 211 of the positioning portion 21 and a supporting force in the direction opposite to the first direction X to the third edge 213 of the positioning portion 21. The three acting forces are mutually balanced, so that the sealing ring 2 can not slide. However, due to the size limitation of the seal ring 2, the moment of the two supporting forces against the seal ring 2 is difficult to balance with the moment of the shear force, resulting in a situation where the seal ring 2 may roll in an arc. Because the third edge 213 and the fourth edge 221 are perpendicular to the sealing groove 13 and exert supporting acting forces on the fourth edge 221, the balance of the three acting forces is not broken, and the moment of the two supporting acting forces and the moment of the shearing force tend to be balanced, so that the possibility of rolling of the sealing ring 2 is reduced. In addition, when the third side 213 is perpendicular to the fourth side 221, the force arm of the supporting force applied to the third side 213 by the seal groove 13 is larger and the generated moment is larger than when the included angle between the third side 213 and the fourth side 221 is other angles, so that the balance of the total moment is more easily satisfied, and the possibility of the seal ring 2 rolling is reduced. The angle between the sixth side 223 and the first side 211 is an obtuse angle, which is beneficial for the smooth insertion of the connected object. Simultaneously, the centering function of two connecting objects can be realized, so that the connecting objects and the socket end 11 extrude the sealing ring 2 in the same degree along the circumferential direction of the sealing ring 2, and the possibility of local failure caused by uneven extrusion degree of the sealing ring 2 is reduced.

Fig. 6 is a schematic cross-sectional view of a seal groove of a pipe body of a concrete pipe according to an embodiment of the present invention.

With continuing reference to fig. 5 in conjunction with fig. 6, the sealing groove 13 includes a first subslot 131 and a second subslot 132 that communicate and extend in a direction away from the center of the seal ring 2, the first subslot 131 being coupled with the positioning portion 21, the second subslot 132 being coupled with a portion of the seal body 22; the depth of the second subslot 132 gradually decreases or remains constant in a direction away from the first subslot 131. The first subslot 131 and the positioning part 21 are coupled such that the positioning part 21 can be securely defined within the first subslot 131. Note that the first sub-groove 131 and the second sub-groove 132 communicate with each other, and together form the seal groove 13. The first subslot 131 has a cross-sectional shape conforming to the positioning part 21 and includes a first slot edge 133, a second slot edge 134, and a third slot edge 135. The first groove edge 133 is parallel to the third groove edge 135, the second groove edge 134 is a concave arc, the second groove edge 134 is tangent to the first groove edge 133, and the second groove edge 134 intersects the third groove edge 135; the distance from the point of the second groove side 134 to the center of the positioning portion 21 is greater than or equal to the distance from the point of the first groove side 133 to the center of the positioning portion 21. The second sub-groove 132 is coupled to a portion of the sealing body 22, and can limit the position of the sealing body 22 in addition to supporting the sealing body 22, and also has the effects of enlarging the compression space of the sealing ring and compensating the rebound amount of the sealing ring. The second sub-slot 132 comprises a fourth slot edge 136 and a fifth slot edge 137, the fourth slot edge 136 is connected to the third slot edge 135, the fourth slot edge 136 is inclined with respect to the third slot edge 135 towards the side facing away from the first slot edge 133, the fifth slot edge 137 is a concave arc, and an opening of the sealing slot 13 is arranged between the fifth slot edge 137 and the first slot edge 133. When the seal ring 2 is installed in the seal groove 13, the first side 211 is attached to the first groove side 133, the second side 212 is attached to the second groove side 134, the third side 213 is attached to the third groove side 135, the fourth side 221 is attached to the fourth groove side 136, and a part of the fifth side 222 is attached to the fifth groove side 137.

When the seal ring 2 is mounted in the seal groove 13, the seal ring 2 is deformed first and loses the basic shape of the circular ring. When external force is applied to make the seal ring enter the groove, the rigid framework inevitably compresses rubber outside the framework, so that the center of the seal ring 2 deviates from the axis of the female end 11, and the rest part of the positioning part 21 is gradually embedded into the first sub-groove 131. The sealing body 22 is knocked, the sealing ring 2 is restored to be circular through the elasticity of the rigid framework 23, and the sealing ring 2 is tightly attached to the sealing groove 13.

It should be noted that the female end 11 of the pipe body 1 is inserted into a connected object, and the connected object may be another pipeline or another pipe body 1 of a concrete pipe.

Fig. 7 is a schematic structural view of the concrete pipe connected to another pipeline according to the embodiment of the present invention.

Referring to fig. 7, when the pipe body 1 of the concrete pipe is inserted into other pipes, the concrete pipe may include only one pipe body 1 and one packing 2. At this point, the other lines are inserted into the female end 11 of the pipe body 1 and sealed by the seal ring 2. Other tubing should include at least one socket end 12. When other pipelines are inserted into the concrete pipe, the spigot ends 12 of the other pipelines are inserted into the socket ends 11 of the pipe bodies 1, and the sealing bodies 22 of the sealing rings 2 in the socket ends 11 are abutted against the outer wall surfaces of the other pipelines. When the pipe body 1 is inserted in place with other pipelines, the sealing ring 2 is in a compressed state, and the sealing body 22 applies pressure to the outer wall surfaces of the other pipelines to realize sealing between the sealing ring 2 and the outer wall surfaces of the other pipelines. Illustratively, referring to fig. 7, the other conduit may be a vessel with a socket end 12, such as a water tank with a socket end 12, or a special pipe with a socket end 12, such as a tee with three ports each being a socket end 12.

Fig. 8 is a schematic structural diagram illustrating the insertion of two pipe bodies of the concrete pipe according to the embodiment of the present application. Fig. 9 is a cross-sectional view of the B-B interface of the concrete pipe shown in fig. 8. Fig. 10 is a partially enlarged view of a region B of the concrete pipe shown in fig. 9.

Referring to fig. 8, 9 and 10, when the pipe body 1 of the concrete pipe is connected with other pipe bodies 1, the number of the pipe bodies 1 is at least two, and at least two pipe bodies 1 are sequentially inserted; the pipe body 1 further comprises a socket end 12, and the socket end 12 is located at the end part of the pipe body 1 along the direction opposite to the first direction X; in two inserted pipe bodies 1, the spigot end 12 of one pipe body 1 is inserted into the spigot end 11 of the other pipe body 1, and the sealing body 22 of the sealing ring 2 in the spigot end 11 is abutted with the spigot end 12. When two adjacent body 1 are inserted into each other, the spigot end 12 of one of the body 1 is inserted into the spigot end 11 of the other body 1, and at the moment, the sealing body 22 of the sealing ring 2 is abutted against the outer wall surface of the spigot end 12, so that the two bodies 1 are sealed. When the two pipe bodies 1 are inserted in place, the sealing ring 2 is in a compressed state, and the sealing body 22 applies pressure to the outer wall surface of the socket end 12 to realize sealing between the sealing ring 2 and the outer wall surface of the socket end 12. Illustratively, the whole body 1 of the concrete pipe may be a bent pipe or a straight pipe. When the pipe body 1 is a bent pipe, the inserted part of the female end 11 and the male end 12 is a straight pipe. When the socket end 12 is machined, the socket end 12 needs to be subjected to deburring treatment, so that the sealing ring 2 is prevented from being scratched by burrs.

With continued reference to fig. 10, the outer side of the socket end 12 is provided with a chamfer structure, and the dimension of the chamfer structure along the radial direction of the pipe body 1 is 5% -15% of the thickness of the pipe body 1. For example, the chamfered structure has a dimension in the radial direction of the pipe body 1 of 10% of the thickness of the pipe body 1. A chamfer structure is provided on the outside of the socket end 12 so that no significant corners exist on the outside of the socket end 12. When the socket end 12 and the female end 11 are inserted into place, the sealing ring 2 is pressed by the socket end 12 and the female end 11, so that when the socket end 12 is inserted into the female end 11, the outer edge of the socket end 12 slides over part of the surface of the sealing body 22. The chamfer configuration reduces the risk of scratching the surface of the seal body 22 by the outer edge of the spigot tube and provides a guiding action to provide good sealing of the seal body 22. The diameter of the end face edge of the chamfered spigot end 12 should be less than or equal to the internal diameter of the seal ring 2.

When the dimension of the chamfered structure in the radial direction of the pipe body 1 is within the above range, it is possible to improve the situation where the outer side of the socket end 12 scratches the surface of the seal body 22 due to the excessively small radial dimension of the chamfered structure. The condition that the axes of the two pipe bodies 1 are dislocated or deflected due to the oversize of the chamfer structure can be improved. Furthermore, the chamfered structure facilitates the centering of the socket end 12 when the socket end 12 is inserted into the female end 11, so that the axes of the two pipes 1 can coincide. The dimensional quality of the chamfered structure is the difference between the dimension of the end face before chamfering and the dimension of the end face after chamfering.

Fig. 11 is a schematic view of an internal structure of a pipe body mold for a concrete pipe according to an embodiment of the present invention. Fig. 12 is a schematic cross-sectional view of a first mold of a pipe body mold for a concrete pipe according to an embodiment of the present application.

Referring to fig. 11 and 12, another embodiment of the present application provides a concrete pipe body 1 mold for molding a concrete pipe body 1 of the previous embodiment of the present application.

The pipe body 1 mold comprises an annular first mold 3, the first mold 3 comprises a first molding part 31, a second molding part 32 and a mold framework 33, the cross section of the first molding part 31 is the same as that of the positioning part 21 of the sealing ring 2, the cross section of the second molding part 32 is the same as that of the sealing body 22 of at least part of the sealing ring 2, the first molding part 31 extends along the direction departing from the center of the first mold 3, the extending direction of the second molding part 32 extends in the direction perpendicular to the plane of the first mold 3, and the mold framework 33 is annular and is located in the first molding part 31.

The first mold 3 is used for molding the seal groove 13 of the pipe body 1. The pipe body 1 mould further comprises an outer mould, an inner mould, a socket mould and a bottom mould base, wherein the socket mould is installed on the bottom mould base, one end of the inner mould is connected with the socket mould, the other end of the inner mould is connected with the socket mould, and the outer mould is sleeved on the outer side of the inner mould. The first die is sleeved on the outer side of the socket die. The outer die, the inner die, the socket die and the bellmouth die form a hollow cavity, and the cavity is used for pouring the concrete pipe. And obtaining the pipe body 1 of the concrete pipe after the concrete is solidified. When the first mold 3 is used, the first mold 3 is sleeved on the outer wall surface of the socket mold 6, so that the sealing groove 13 is located on the inner wall surface 14 of the molded pipe body 1. When the pipe body 1 is obtained through demoulding, the inner mould, the outer mould, the socket mould and the bottom mould base are demoulded for the first time together, and the first mould 3 is demoulded for the second time.

The first molding portion 31 can form the sealing groove 13 of the inner wall surface 14 of the pipe body 1 into a groove structure coupled to the positioning portion 21 of the seal ring 2, that is, a first sub-groove 131. The second molding portion 32 enables the sealing groove 13 of the pipe body 1 to form a groove structure coupled to a portion of the sealing body 22 of the seal ring 2, that is, to form the second sub-groove 132. Since the first molding part 31 and the second molding part 32 are of an integral structure, the groove structure formed by the first molding part 31 and the groove structure formed by the second molding part 32 can be communicated into a composite groove structure, i.e., the sealing groove 13.

With continued reference to fig. 12, the cross-sectional shape of the first forming portion 31 is consistent with the positioning portion 21, and includes a first molding edge 311, a second molding edge 312, and a third molding edge 313. The first die edge 311 is parallel to the third die edge 313, the second die edge 312 is a convex arc, the second die edge 312 is tangent to the first die edge 311, and the second die edge 312 is intersected with the third die edge 313; the distance from the point of the second die edge 312 to the center of the positioning portion 21 is greater than or equal to the distance from the point of the first die edge 311 to the center of the positioning portion 21. The second molding 32 conforms to a portion of the seal body 22. The second forming portion 32 includes a fourth molding edge 321 and a fifth molding edge 322, the fourth molding edge 321 is connected to the third molding edge 313, and the fourth molding edge 321 is a groove edge inclined toward a side away from the first molding edge 311 relative to the third molding edge 313. The cross-sectional shape of the first mold 3 further comprises a sixth mold edge 323, the sixth mold edge 323 connecting the first mold edge 311 and the fifth mold edge 322. When the first mold 3 is used, the surface corresponding to the sixth mold edge 323 is attached to the socket mold 6, the first mold edge 311 corresponds to the first groove edge 133 of the cross section of the sealing groove 13, the second mold edge 312 corresponds to the second groove edge 134 of the cross section of the sealing groove 13, the third mold edge 313 corresponds to the third groove edge 135 of the cross section of the sealing groove 13, the fourth mold edge 321 corresponds to the fourth groove edge 136 of the cross section of the sealing groove 13, and the fifth mold edge 322 corresponds to the fifth groove edge 137 of the cross section of the sealing groove 13.

The first mould 3 may be made of an elastic material. Alternatively, the first mold 3 is made of hard rubber. The mold frame 33 has stretch resistance and can prevent the first mold 3 from being elastically deformed. The mold frame 33 serves as a support structure for the first mold 3, and can reduce the risk of deformation and displacement of the seal groove 13 by preventing the first mold 3 from being displaced while maintaining its shape during concrete pouring. The mold frame 33 can provide the first mold 3 with an impact resistance, and fix the first mold 3 to the socket mold 6 to overcome the impact of the concrete on the first mold 3 during the concrete pouring.

Fig. 13 is a schematic structural view of a locking male and female of the first mold according to the embodiment of the present application.

Referring to fig. 13, the first mold 3 further includes a locking pin 34 and a locking box 35, the locking box 35 is coupled with the locking pin 34, and the locking box 35 and the locking pin 34 are detachably hooked. When the locking female buckle 35 and the locking male buckle 34 are hooked and connected, the locking female buckle is sleeved on the female die of the bellmouth, the bellmouth female die has a supporting force in the direction opposite to the axis of the first die 3, the locking male buckle is in a locking state at the moment and cannot be loosened due to external force, the risk that the first die is unhooked due to concrete impact during pouring is reduced, the first die 3 forms a revolving body, and the first forming part 31 and the second forming part 32 form a complete whole. When the second demolding is performed, the locking female buckle 35 and the locking male buckle 34 are opened, the socket die is separated from the inner surface of the socket end 11 during the first demolding, the first die 3 loses outward supporting force, the first die 3 is bent inwards, and the first die 3 can be removed from the sealing groove 13 of the pipe body 1. The hooking mode of the female locking button 35 and the male locking button 34 is not limited, and can be realized by adopting a form of an embedding groove. When the female lock button 35 and the male lock button 34 are unlocked, the female lock button 35 and the male lock button 34 can be detached only by applying a force to the inside. When concrete is poured, the first die 3 cannot be unlocked because the first die 3 is sleeved on the outer side of the socket die. At the second demoulding, the socket mould is already removed and the first mould 3 can be unlocked. It should be noted that the locking box 35 and the locking pin 34 should have a certain deformation resistance so that the first mold 3 can be reused many times.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.