CN115264196A

CN115264196A - Concrete pipe

Info

Publication number: CN115264196A
Application number: CN202210622954.0A
Authority: CN
Inventors: 郝百顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-11-01
Also published as: WO2023232101A1

Abstract

The application discloses a concrete pipe. The concrete pipe includes: the pipe body extends along a first direction, the pipe body comprises a female end and a lining plate, the female end is positioned at the end part of the pipe body along the first direction, the lining plate is positioned at the inner side of the female end, the lining plate comprises an inner wall surface, and a sealing groove and a positioning groove are formed in the inner wall surface; at least one sealing ring is arranged on the inner side of the lining plate, at least part of the sealing ring is coupled with the sealing groove, at least part of the sealing ring is coupled with the positioning groove, and at least part of the sealing ring protrudes out of the inner wall surface. This application sets up the welt in female end inboard to set up seal groove and constant head tank on the welt, welt structural strength can compensate the female end poor strength problem of concrete pipe, thereby reduces the risk that seal groove and constant head tank take place deformation, and then reduces the rolling possibility of sealing washer. By preventing the sealing ring from rolling and sliding, the sealing effect is improved, the positioning reliability of the sealing ring is improved, and meanwhile, the sealing between the sealing ring and the socket is realized.

Description

Concrete pipe

Technical Field

The application relates to the technical field of concrete pipes and spigot-and-socket joints, in particular to a concrete pipe.

Background

Concrete pipes are used for transporting water over long distances and at high flow rates. 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 or slide between the socket end and the socket end, even slide out of a limiting step of the sealing groove, and sealing failure is caused.

Disclosure of Invention

The embodiment of the application provides a concrete pipe, can reduce the sealing washer and influence the sealed risk of concrete pipe because of sliding or roll.

In one 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 a lining plate, the female end is positioned at the end part of the pipe body along the first direction, the lining plate is positioned at the inner side of the female end, the lining plate comprises an inner wall surface, and a sealing groove and a positioning groove are formed in the inner wall surface; at least one sealing ring is arranged on the inner side of the lining plate, at least part of the sealing ring is coupled with the sealing groove, at least part of the sealing ring is coupled with the positioning groove, and at least part of the sealing ring protrudes out of the inner wall surface.

According to an embodiment of an aspect of the present application, the seal ring includes a seal body, at least a portion of the seal body is coupled with the seal groove, an inner side of the seal body is provided with a tapered structure, and an inner diameter of the tapered structure is gradually reduced along an end direction away from the socket end.

According to an embodiment of an aspect of the present application, the seal ring further includes a positioning portion, and at least a portion of the positioning portion is coupled with the positioning groove.

According to an embodiment of an aspect of the present application, the inner wall surface is further provided with a protrusion, and the protrusion is located between the sealing groove and the positioning groove; the seal ring further includes a recessed portion coupled with the raised portion.

According to the embodiment of this application on the one hand, the sealing washer still includes the skeleton, and the skeleton sets up in location portion along the circumference of sealing washer, and the skeleton is located the space that the locating slot formed.

According to an embodiment of an aspect of the present application, the cross-sectional shape of the positioning groove is a trapezoid, and the width of the bottom of the positioning groove is smaller than the width of the positioning portion along the axial direction of the pipe body.

According to an embodiment of an aspect of the present application, the cross-sectional shape of the sealing groove is rectangular.

According to an embodiment of an aspect of the present application, the detent groove is located on a side of an end of the sealing slot adjacent to the female end.

According to an embodiment of an aspect of the application, the minimum inner diameter of the inner wall surface of the backing plate is equal to the inner diameter of the female end.

According to an embodiment of one aspect of the present application, the number of the tube bodies is at least two, and the at least two tube bodies are sequentially inserted; the socket end is positioned at one end of the pipe body far away from the female end along the first direction; in the two inserted pipe bodies, the socket end of one pipe body is inserted into the socket end of the other pipe body, and the inner side of the sealing ring of the socket end is abutted against the outer side of the socket end.

According to an embodiment of an aspect of the application, the socket end is provided with a reducing structure, and an outer diameter of the reducing structure gradually increases along a direction from the socket end to the socket end.

According to an embodiment of an aspect of the application, the material stiffness of the liner plate is greater than or equal to steel; the lining plate is prefabricated on the inner side of the female end.

The concrete pipe that this application embodiment provided sets up the welt in female end inboard to set up seal groove and constant head tank on the welt, welt structural strength can compensate the female end structural strength difference problem of concrete pipe, thereby reduces the risk that seal groove and constant head tank take place deformation, and then reduces the rolling possibility of sealing washer. In addition, the positioning groove can fix the position of the sealing ring relative to the concrete pipe, and the sliding performance of the sealing ring is reduced. Through reducing the risk that the sealing washer rolls and slides, this application embodiment can improve sealed effect and sealed reliability.

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 isbase:Sub>A sectional view of the concrete pipe of fig. 1 taken alongbase:Sub>A-base:Sub>A section.

Fig. 3 is a schematic structural view of a sealing ring of a concrete pipe according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a liner panel of a concrete pipe according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a concrete pipe according to an embodiment of the present invention when a plurality of pipe bodies are inserted into each other.

Fig. 6 is a schematic cross-sectional view of a packing of a concrete pipe according to an embodiment of the present application.

Reference numerals are as follows:

1. a tube body; 11. a female end; 12. a liner plate; 121. a sealing groove; 122. positioning a groove; 13. a socket end;

2. a seal ring; 21. a seal body; 211. a first side; 212. a second edge; 213. a third side; 214. an eighth side; 22. a positioning part; 221. a fourth side; 222. a fifth side; 223. a sixth side; 23. a framework; 24. a recessed portion; 241. and a seventh side.

Detailed Description

Features of various aspects of the present application and exemplary embodiments 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, in the present application, the embodiments and features of the embodiments 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 phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like 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 associated 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.

The applicant has found that when concrete pipes are used, a plurality of sections of concrete pipes are usually prefabricated, one end of each section of concrete pipe is a female end, the other end of each section of concrete pipe is a female end, and then the plurality of sections of concrete pipes are sequentially spliced, wherein the female end of a certain section of concrete pipe is inserted into the female end of an adjacent concrete pipe. In order to seal the plug-in connection, a sealing ring is arranged between the socket end and the socket end. The sealing ring is sleeved at the socket end, and then the socket end and the female end are plugged. However, during plugging, since the cross section of the sealing ring is usually circular and is formed into a cylindrical shape or a conical shape, the relative movement between the female end and the female end can cause the sealing ring to roll. When the sealing ring is inserted, the sealing ring with elastic elongation performance can cross the limiting step under the counterforce of the female end and cannot enter the female end according to the preset value. The damage of the sealing ring can be caused, 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. Therefore, in actual construction, the sealing failure probability of the traditional concrete bell and spigot pipe is high.

In view of the above problems, the embodiment of the present application provides a concrete pipe, one end of the pipe body is a female end, a lining plate is arranged on the inner side of the female end, and a sealing groove and a positioning groove are arranged on the lining plate. Through setting up the higher welt of structural strength, can compensate the poor problem of concrete pipe's female end structural strength to reduce seal groove and constant head tank and take place deformation and by the risk of socket harmomegathus, and then reduce the sealing washer and roll or the possibility that slides and become invalid. In addition, the positioning groove can fix the position of the sealing ring relative to the concrete pipe, and the possibility of sliding or rolling of the sealing ring is reduced. Through reducing the risk that the sealing washer rolls and slides, this application embodiment can improve sealed effect and sealed reliability to have stopping and self-locking function.

Example 1

Fig. 1 is a schematic structural view of a concrete pipe according to an embodiment of the present application. Fig. 2 isbase:Sub>A sectional view of the concrete pipe of fig. 1 taken alongbase:Sub>A-base:Sub>A section. Fig. 3 is a schematic structural view of a sealing ring of a concrete pipe according to an embodiment of the present application. FIG. 4 is a schematic cross-sectional view of a liner panel of a concrete pipe according to an embodiment of the present application.

Referring to fig. 1 to 4, an embodiment of the present application provides a concrete pipe, including: at least one pipe body 1 extending along a first direction, wherein the pipe body 1 comprises a female end 11 and a lining plate 12, the female end 11 is positioned at the end part of the pipe body 1 along the first direction, the lining plate 12 is positioned at the inner side of the female end 11, the lining plate 12 comprises an inner wall surface, and a sealing groove 121 and a positioning groove 122 are arranged on the inner wall surface; at least one sealing ring 2, the sealing ring 2 is located at the inner side of the lining plate 12, at least part of the sealing ring 2 is coupled with the sealing groove 121, at least part of the sealing ring 2 is coupled with the positioning groove 122, and at least part of the sealing ring 2 protrudes relative to the inner wall surface.

It should be noted that the cross-sectional shape of the concrete pipe in the embodiment of the present application along the vertical circumferential direction may be circular or may be deformed more than once, and in the embodiment of the present application, a circular shape is taken as an example for description.

The pipe body 1 can be manufactured in a prefabricated form, and when the concrete pipe is installed, the sealing ring 2 is installed on the inner side of the female end 11 of the prefabricated pipe body 1. And inserting the plugging object into the female end 11 to realize connection. The inserted object can be other pipelines or other pipe bodies 1 of concrete pipes. The pipe body 1 is made by casting concrete, and when casting concrete, the lining plate 12 is arranged at a position inside the female end 11, so that the lining plate 12 is positioned inside the female end 11 of the pipe body 1 after the forming. The lining plate 12 is made of a material with high structural strength, so that the risk that the sealing groove 121 is deformed or is burst is reduced, the defect that the local strength of the female end of the concrete pipe is poor is overcome, and the sealing effect of the concrete pipe in the embodiment of the application is guaranteed due to the possibility that the sealing ring 2 is separated from the sealing groove 121 through rolling or sliding.

A sealing groove 121 is formed in an inner wall surface of the liner 12, and a portion of the sealing ring 2 is coupled to the sealing groove 121, thereby ensuring a sealing effect of the sealing ring 2 to the insertion portion. A positioning groove 122 is further provided in the inner wall surface of the liner 12, and a part of the packing 2 is coupled to the positioning groove 122. Even if the inserted object is inserted into the female end 11, the sealing ring 2 is subjected to a shearing moment, but since a part of the sealing ring 2 is coupled with the positioning groove 122, the possibility of rolling or sliding of the sealing ring 2 can be reduced, thereby ensuring a good sealing effect. When the inserted object is inserted into the female end 11, at least part of the sealing ring 2 protrudes relative to the inner wall surface, so that the protruding part of the sealing ring 2 relative to the inner wall surface can be abutted against the inserted object, and the purpose of sealing is achieved.

When the inserted object is inserted into the female end 11, the part of the sealing ring 2 protruding relative to the inner wall surface is deformed under the action of the inserted object and bends towards the direction deviating from the female end 11. After the inserted object is completely inserted into the female end 11, if the inserted object tends to withdraw under the action of external force, the part of the sealing ring 2, which is protruded relative to the inner wall surface, is deformed, and tends to recover the deformation, so that the sealing ring 2 is further compressed, and larger friction resistance is generated to prevent the inserted object from withdrawing from the female end 11, and the self-locking function after insertion is realized.

Further, with continued reference to fig. 1 to 4, the sealing ring 2 includes a sealing body 21, at least a portion of the sealing body 21 is coupled to the sealing groove 121, and a tapered structure is disposed inside the sealing ring 2, and an inner diameter of the tapered structure is gradually reduced along an end direction away from the female end 11.

When the object to be inserted is inserted into the pipe body 1, at least a part of the seal body 21 of the seal ring 2 is coupled to the seal groove 121, and the seal between the seal ring 2 and the female end 11 can be achieved. The inboard of sealing washer 2 is equipped with the toper structure, and the internal diameter of toper structure reduces along the tip direction of keeping away from female end 11 gradually, can play the effect of adjusting well when pegging graft. When even connecting the object and inserting with body 1, the grafting object can be followed the great one end of formation structure internal diameter and inserted, and the direction of returning the toper structure is adjusted well for the axis of grafting object coincides with the axis of body 1, reaches the purpose of adjusting well, thereby reduces the sealing washer 2 along the difference of the effort that everywhere receives of the circumference of body 1, further reduces sealing washer 2 because of the uneven possibility that loses efficacy of atress, and then reinforcing seal effect.

Further, with continued reference to fig. 1 to 4, the sealing ring 2 further includes a positioning portion 22, and at least a portion of the positioning portion 22 is coupled with the positioning groove 122. The positioning portion 22 is used to fix the position of the seal ring 2 relative to the liner plate 12, and in particular, to reduce the possibility of the seal ring 2 sliding relative to the liner plate 12, thereby reducing the risk of seal failure caused by the seal ring 2 separating from the seal groove 121.

Further, with reference to fig. 1 to 4, the inner wall surface is further provided with a protrusion, and the protrusion is located between the sealing groove 121 and the positioning groove 122; the sealing ring 2 further comprises a recess 24, the recess 24 being coupled with the protrusion. The projection and recess 24 couple to further reduce the likelihood of the seal ring 2 sliding relative to the backing plate 12. In addition, when the sealing ring 2 is subjected to a shearing moment, the convex portion and the concave portion 24 are coupled, and the positioning portion 22 and the positioning groove 122 are coupled, so that the liner plate 12 can apply a moment in the opposite direction to the sealing ring 2, the possibility that the sealing ring 2 rolls relative to the liner plate 12 is reduced, and the risk of sealing failure caused by the fact that the sealing ring 2 is separated from the sealing groove 121 is reduced.

Further, with continued reference to fig. 1 to 4, the sealing ring 2 further includes a skeleton 23, the skeleton 23 is disposed in the positioning portion 22 along the circumferential direction of the sealing ring 2, and the skeleton 23 is located in the space formed by the positioning groove 122. The framework 23 is used to support the gasket 2 so that the gasket 2 is in an expanded state. It should be noted that the framework 23 may be made of a rigid material in a compressed state, and applies a force to the seal ring 2 radially outward along the seal ring 2, so as to place the seal ring 2 in an expanded state. If the sealing ring 2 slides or rolls relative to the lining plate 12, the positioning part 22 can be separated from the positioning groove 122. Because the framework 23 is located in the space formed by the positioning groove 122, the tension of the framework 23 can prevent the positioning part 22 from being separated from the positioning groove 122, so that the possibility that the sealing ring 2 slides or rolls relative to the lining plate 12 is reduced, and the sealing effect is enhanced.

Further, with continued reference to fig. 1-4, a positioning slot 122 is located at a side of the sealing groove 121 near the end of the female end 11; the framework 23 of the sealing ring 2 is located in the positioning groove 122, and the tension of the framework 23 can keep the sealing body 21 in the sealing groove 121, so as to prevent the sealing body 21 from being separated from the sealing groove 121 and reaching the first sealing of the sealing ring 2 and the female end 11.

In addition, when the pipe body 1 is inserted into the object to be inserted, since the positioning groove 122 is located on the side of the end portion of the seal groove 121 close to the female end 11, the positioning groove 122 can apply a moment to the seal ring 2 to prevent the seal ring from rotating, and thus the possibility of the seal ring 2 rolling with respect to the liner plate 12 can be reduced. In addition, the maximum inner diameter of the positioning groove 122 is greater than the maximum inner diameter of the sealing groove 121, so that the moment arm of the positioning groove 122 applying the moment to the positioning portion 22 is increased, the acting force applied to the positioning portion 22 by the positioning groove 122 is reduced, and the possibility of failure of the sealing ring 2 due to too large stress is reduced.

Further, with reference to fig. 4, the cross-sectional shape of the positioning slot 122 is a trapezoid, and one side of the end surface close to the female end 11 is a bevel edge of the trapezoid; in the uncompressed state, the cross-sectional shape of at least part of the locating portion 22 is semi-circular. Because the cross section of the positioning groove 122 is trapezoidal, and one side of the end surface close to the female end 11 is correspondingly a trapezoidal oblique side, when the sealing ring 2 is installed, the sealing ring 2 can be obliquely inserted into the positioning groove 122 through the corresponding position of the oblique side, and then the sealing ring 2 is rotated, so that the positioning portion 22 is coupled with the positioning groove 122, and the sealing body 21 is coupled with the sealing groove 121. The other side can reduce the possibility that the position fixing part 22 slips out of the position fixing groove 122. When the plugging object is plugged with the pipe body 1, the sealing ring 2 is extruded, the positioning part 22 is deformed, and the positioning part 22 with the semicircular cross section can be coupled with the positioning groove 122 with the right trapezoid cross section, so that the sealing effect can be achieved. In addition, the width of the bottom of the positioning groove 122 along the axial direction of the female end 11 is smaller than the width of the positioning portion 22, the positioning portion 22 can enter the positioning groove 122 more easily due to the trapezoidal cross-sectional shape, the width of the bottom of the positioning groove 122 is slightly smaller, the positioning portion 22 can be more difficult to slide out from the positioning groove 122, and the positioning portion 22 is squeezed into the positioning groove 122, which ensures sealing for multiple times.

Further, with continued reference to fig. 4, the cross-sectional shape of the sealing slot 121 is rectangular; in the uncompressed state, at least part of the cross-sectional shape of the seal body 21 is semi-circular. The seal groove 121 having a rectangular cross-sectional shape can reduce the possibility of the seal body 21 being detached from the seal groove 121, thereby ensuring a good sealing effect. Since the maximum inner diameter of the positioning groove 122 is larger than the maximum inner diameter of the seal groove 121, the seal groove 121 having a rectangular cross-sectional shape does not significantly affect the installation of the seal ring 2. When the inserting object is inserted into the pipe body 1, the sealing ring 2 is extruded, the sealing body 21 deforms, the sealing body 21 with the semicircular cross section can be coupled with the rice noodle groove with the rectangular cross section, and the sealing effect is guaranteed.

When the seal ring 2 is fitted to the inside of the female end 11, a part of the positioning portion 22 is first fitted into the positioning groove 122. Then, the gasket 2 is pushed at a position in the circumferential direction of the gasket 2, so that the gasket 2 is eccentric from the female end 11, and at this time, the gasket 2 at the position is coupled to the liner 12. And knocking the sealing ring 2 gradually from the position along the circumferential direction of the sealing ring 2, so that other parts of the sealing ring 2 are coupled with the lining plate 12 until all positions of the sealing ring 2 along the circumferential direction are coupled with the lining plate 12, the sealing ring 2 is coaxial with the female end 11, and the assembly of the sealing ring 2 and the female end 11 is completed. The diameter of the framework 23 of the sealing ring 2 is larger than the minimum diameter of the lining plate 12, so that the framework 23 is also positioned in the positioning groove 122.

Further, with reference to fig. 1 to 4, the minimum inner diameter of the inner wall surface of the lining board 12 is equal to the inner diameter of the female end 11, so that the inner wall surface of the lining board 12 and the inner side of the female end 11 can form a complete cylindrical surface, the plugging object can be smoothly inserted into the female end 11, and the interference of the lining board 12 on the plugging object is avoided.

Fig. 5 is a schematic structural diagram of a plurality of concrete pipes according to an embodiment of the present invention.

Further, referring to fig. 5, the number of the tube bodies 1 is at least two, and at least two tube bodies 1 are sequentially inserted; the pipe body 1 further comprises a socket end 13, and the socket end 13 is positioned at one end of the pipe body 1 far away from the female end 11 along the first direction; in the two inserted pipe bodies 1, the spigot end 13 of one pipe body 1 is inserted into the spigot end 11 of the other pipe body 1, and the inner side of the sealing ring 2 of the spigot end 11 is abutted with the outer side of the spigot end 13.

When the plurality of pipe bodies 1 are sequentially inserted, one end of the pipe body 1 is a female end 11, and the other end is a female end 13. In the two inserted pipe bodies 1, the spigot end 13 of one pipe body is inserted into the spigot end 11 of the other pipe body, and at the moment, the sealing body 21 of the sealing ring 2 is abutted against the outer wall surface of the spigot end 13, so that the two pipe 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 21 applies pressure to the outer wall surface of the socket end 13, so that sealing between the sealing ring 2 and the outer wall surface of the socket end 13 is realized. Illustratively, the body 1 of the concrete pipe may be a bent pipe or a straight pipe as a whole. When the pipe body 1 is a bent pipe, the inserted parts of the female end 11 and the male end 13 are both straight pipes.

The outer side of the socket end 13 is provided with a chamfer structure, so that no obvious edge exists on the outer side of the socket end 13. When the socket end 13 and the female end 11 are inserted into place, the sealing ring 2 is pressed by the socket end 13 and the female end 11, so that the outer edge of the socket end 13 slides over part of the surface of the sealing body 21 when the socket end 13 is inserted into the female end 11. The chamfer structure can reduce the risk that the outer edge of the socket pipe scratches the surface of the sealing body 21, and has a guiding function to enable the sealing body 21 to have good sealing performance. The diameter of the end face edge of the chamfered rear socket end 13 should be less than or equal to the inner diameter of the seal ring 2.

Further, the socket end 13 is provided with a reducing structure, and the outer diameter of the reducing structure gradually increases along the direction from the socket end 13 to the female end 11. Therefore, the outer edge of the socket end 13 forms a cone shape, so that the socket end 13 can be conveniently inserted into the female end 11, and when the socket end 13 and the female end 11 are inserted, the conical edge can be prevented from damaging the sealing ring 2, so that a good sealing effect is ensured.

Further, the material rigidity of the lining plate is larger than or equal to that of steel, and the lining plate can be made of alloy or organic polymer material with higher structural rigidity. When making the concrete pipe of this application embodiment, the welt is prefabricated in female end 11 inboards, directly pours in female end 11, can prevent effectively that seepage from between welt and the concrete pipe to play and prevent that concrete pipe female end 11 from being by socket end 13 and the risk of sealing washer 2 harmomegathus.

Example 2

With continuing reference to fig. 2 and 3 in conjunction with fig. 6, a seal ring 2 according to an embodiment of the present invention is used in a concrete pipe according to embodiment 1 of the present invention.

The embodiment of the application provides a sealing washer 2, includes: a sealing body 21, at least part of the sealing body 21 extending radially outwards of the sealing ring 2; the positioning part 22 is connected with the sealing body 21 along the axial direction of the sealing ring 2, and at least part of the positioning part 22 extends outwards along the radial direction of the sealing ring 2; the inner diameter of the positioning portion 22 is smaller than that of the sealing body 21; and an annular framework 23 positioned in the positioning part 22.

This application embodiment is when using sealing washer 2 of this application embodiment, installs sealing washer 2 in the female end 11 inboard of the body 1 of concrete pipe, inserts the spigot end 13 of another body 1 again, realizes the sealed between two bodies 1 through sealing washer 2.

The sealing body 21 is used for realizing the sealing effect of the sealing ring 2, and the sealing ring 2 can be coupled with the sealing groove 121 of the female end 11 of the pipe body 1 along the radial extension of the sealing ring 2, so that the sealing purpose is achieved. The positioning portion 22 is used for fixing the position of the seal ring 2 relative to the female end 11, and extends along the radial direction of the seal ring 2, so that the possibility that the seal ring 2 rolls or slides relative to the female end 11 can be reduced, and the sealing effect is enhanced. Annular skeleton 23 can support sealing washer 2, reduces the possibility that location portion 22 breaks away from constant head tank 122, has radial outside effort to location portion 22 under the effect of the outside tension of skeleton 23 simultaneously, compresses tightly location portion 22 in constant head tank 122, further strengthens sealed effect.

Further, with continued reference to fig. 6, the inner side of the sealing ring 2 is provided with a tapered structure, and the inner diameter of the tapered structure gradually increases along the axial direction of the sealing ring 2. The conical structure of the inner side of the sealing ring 2 can play a role in alignment. When the socket end 13 is inserted into the socket end 11, the socket end 13 is inserted into the socket end 11 under the guidance of the tapered side surface of the tapered structure, and at the moment, the axis of the socket end 13 coincides with the axis of the socket end 11, so that the aim of alignment is fulfilled, the difference of acting force applied to each position of the sealing ring 2 in the circumferential direction is reduced, and the possibility of failure of the sealing ring 2 due to uneven stress is reduced.

Further, with continued reference to fig. 6, the inner diameter of the tapered structure gradually decreases in the axial direction of the seal ring 2 from the positioning portion 22 to the seal body 21. When the socket end 13 is inserted into the socket end 11, the sealing ring 2 is subjected to the moment generated by the combined action of the socket end 13 and the socket end 11, and the risk of rolling exists. With location portion 22 setting in the great one side of toper structure internal diameter, location portion 22 and the constant head tank 122 interact of bell end 11 produce and hinder sealing washer 2 pivoted moment, consequently, can reduce the rolling risk of sealing washer 2 relative bell end 11, improve sealed effect.

Further, the diameter of the framework 23 in the positioning portion 22 of the sealing ring 2 is larger than the minimum diameter of the lining plate 12, and the radial outward tension of the rigid framework 23 realizes that the positioning portion 22 is effectively fixed in the positioning groove 122 of the sealing ring 2, so that the axial thrust in the plugging process is effectively resisted.

Further, with continued reference to fig. 6, the cross-sectional shape of the seal body 21 includes a first side 211, a second side 212 and a third side 213 extending in the radial direction of the seal ring 2, the second side 212, the first side 211 and the third side 213 being connected in sequence, the first side 211 being a convex curve; the diameter of the sealing body 21 at the location corresponding to the second side 212 and at the location corresponding to the third side 213 is smaller than the diameter of the sealing body 21 at the location corresponding to the first side 211. The second side 212, the first side 211 and the third side 213 are connected in sequence, corresponding to a portion of the cross-sectional shape of the sealing body 21. On the seal body 21, portions corresponding to the second side 212, the first side 211, and the third side 213 are coupled with the seal groove 121 of the female end 11. The diameters of the sealing body 21 corresponding to the second edge 212 and the third edge 213 are smaller than the diameter of the sealing body 21 corresponding to the first edge 211, and the portions of the sealing body 21 corresponding to the second edge 212 and the third edge 213 ensure that the sealing body 21 can extend outward in the radial direction of the sealing ring 2. The first side 211 is a convex curve, which may be, for example, a circular arc or an elliptical arc, so that the sealing body 21 can be coupled with the sealing groove 121 of the socket end 11 under a certain external force. Although the first side 211 is a convex curve, after the socket end 13 is inserted into the socket end 11, the sealing body 21 is deformed by extrusion, and a portion corresponding to the first side 211 can be coupled with the sealing groove 121 more tightly, so as to ensure the sealing effect.

Further, with continued reference to fig. 6, the cross-sectional shape of the positioning portion 22 includes a fourth side 221, a fifth side 222 and a sixth side 223 extending in the radial direction of the sealing right, the fifth side 222, the fourth side 221 and the sixth side 223 are connected in sequence, and the fourth side 221 is a convex curve. The fifth side 222, the fourth side 221, and the sixth side 223 are connected in order, corresponding to a part of the cross-sectional shape of the positioning portion 22. In the positioning portion 22, the distance between the fifth side 222 and the sixth side 223 is larger than the width of the bottom of the positioning groove 122. After the sealing ring 2 is installed in the liner 12 of the female end 11, the positioning portion 22 is pressed in the positioning groove 122 under the outward tension of the framework 23. The fourth side 221 is a convex curve, which may be, for example, a circular arc or an elliptical arc, so that the positioning portion 22 can be attached to the positioning groove 122 of the socket end 11 under the action of the radially outward tension of the framework 23, thereby further enhancing the sealing effect.

Further, with reference to fig. 6, the frame 23 is located in an area formed by the positioning portion 22 corresponding to the fifth side 222, the fourth side 221 and the sixth side 223. After the socket end 13 is inserted into the socket end 11, the positioning portion 22 is coupled with the positioning groove 122, and the area formed by the positioning portion 22 corresponding to the fifth side 222, the fourth side 221 and the sixth side 223 is located in the positioning groove 122. Therefore, the frame 23 is located in the space formed by the positioning groove 122, so that the possibility that the positioning portion 22 is disengaged from the positioning groove 122 is reduced, and the seal ring 2 is difficult to roll or slide relative to the female end 11.

Further, with continued reference to fig. 6, between the positioning portion 22 and the seal body 21, along the axial direction of the seal ring 2, there is provided a recessed portion 24 that is inward in the radial direction of the seal ring 2. The cross-sectional shape of the sealing body 21 further includes a seventh side 241, the third side 213, the seventh side 241 and the fifth side 222 are sequentially connected, and the third side 213, the seventh side 241 and the fifth side 222 correspond to the cross-sectional shape of the recess 24. The recess 24 can couple with a protrusion of the female end 11, further reducing the likelihood of the seal ring 2 slipping relative to the backing plate 12. In addition, when the socket end 13 is inserted into the socket end 11, the convex portion and the concave portion 24 are coupled, so that the liner plate 12 can apply a moment in the opposite direction to the seal ring 2, the possibility of rolling of the seal ring 2 relative to the liner plate 12 is reduced, and the risk of seal failure caused by the separation of the seal ring 2 from the seal groove 121 is reduced. The seventh side 241 is used to connect the third side 213 and the fifth side 222 to form a concave shape, and the third side 213, the seventh side 241 and the fifth side 222 correspond to the concave portion 24.

Further, the minimum outer diameter of the recess 24 is smaller than the diameter of the skeleton 23, so that the skeleton 23 can be located in the positioning groove 122 of the female end 11. When the seal ring 2 has a tendency to move relative to the female end 11, the protruding portion of the female end 11 can block the framework 23 by applying a reverse thrust, so as to hinder the seal ring 2 from moving relative to the female end 11.

Further, the cross-sectional shape of the sealing body 21 further includes an eighth side 214, and a sixth side 223, the eighth side 214 and the second side 212 are connected in sequence; the eighth side 214 corresponds with the inner side of the tapered structure. The second side 212, the first side 211, the third side 213, the seventh side 241, the fifth side 222, the fourth side 221, the sixth side 223, and the eighth side 214 are sequentially connected end to form the cross-sectional shape of the gasket 2. When the inserted object is inserted into the female end 11, friction is generated between the eighth edge 214 and the inserted object, so that the sealing ring 2 deforms, and the sealing ring 2 applies pressure to the female end 11 and the inserted object at the same time, thereby ensuring a good sealing effect. When the plugging object tends to be pulled out from the female end 11, the reverse friction force between the eighth edge 214 and the plugging object can make the sealing ring 2 generate a tendency of recovery deformation, so that the pressure of the sealing ring 2 on the female end 11 and the plugging object is further increased, a larger friction force is generated, and stopping and self-locking are realized.

Further, with reference to fig. 6, the framework 23 applies an outward acting force along the radial direction of the sealing ring 2 to the positioning portion 22, and since the framework 23 is located in the space formed by the positioning groove 122, the tension of the framework 23 can prevent the positioning portion 22 from separating from the positioning groove 122, so as to reduce the possibility that the sealing ring 2 slides or rolls relative to the liner plate 12, thereby enhancing the sealing effect.

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.

Claims

1. A concrete pipe, comprising:

the pipe body extends along a first direction, the pipe body comprises a female end and a lining plate, the female end is positioned at the end part of the pipe body along the first direction, the lining plate is positioned at the inner side of the female end, the lining plate comprises an inner wall surface, and the inner wall surface is provided with a sealing groove and a positioning groove;

at least one sealing ring, the sealing ring is located the inboard of welt, at least partial the sealing ring with the seal groove coupling, at least partial the sealing ring with the constant head tank coupling, at least partial the sealing ring relative the internal wall surface protrusion.

2. The concrete pipe of claim 1, wherein the sealing ring comprises a sealing body, at least a portion of the sealing body is coupled to the sealing groove, a tapered structure is provided on an inner side of the sealing body, and an inner diameter of the tapered structure is gradually reduced in a direction of an end portion away from the female end.

3. The concrete pipe of claim 2, wherein the gasket further comprises a positioning portion, at least a portion of the positioning portion being coupled with a positioning groove.

4. The concrete pipe according to claim 3, wherein the inner wall surface is further provided with a boss portion located between the seal groove and the positioning groove;

the seal ring further includes a recessed portion coupled with the raised portion.

5. The concrete pipe according to claim 3, wherein the gasket further comprises a skeleton, the skeleton is disposed in the positioning portion along a circumferential direction of the gasket, and the skeleton is located in a space formed by the positioning groove.

6. The concrete pipe according to claim 3, wherein the positioning groove has a trapezoidal cross-sectional shape, and a width of a bottom of the positioning groove is smaller than a width of the positioning portion in an axial direction of the pipe body.

7. The concrete pipe of claim 2, wherein the cross-sectional shape of the sealing groove is rectangular.

8. The concrete pipe of claim 1, wherein the locating slot is located on a side of an end of the seal groove proximate the female end.

9. The concrete pipe of claim 1, wherein the minimum inner diameter of the inner wall surface of the liner plate is equal to the inner diameter of the female end.

10. 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 one end of the pipe body far away from the socket end along the first direction; in the two inserted pipe bodies, the socket end of one pipe body is inserted into the socket end of the other pipe body, and the inner side of the sealing ring of the socket end is abutted against the outer side of the socket end.

11. The concrete pipe according to claim 10, wherein the spigot end is provided with a reducing structure, an outer diameter of which gradually increases in a direction from the spigot end to the socket end.

12. The concrete pipe of claim 1 wherein the liner is a material having a stiffness equal to or greater than steel; the lining plate is prefabricated on the inner side of the female end.