CN114576451A

CN114576451A - Sealing interface structure of composite pipe

Info

Publication number: CN114576451A
Application number: CN202011389416.9A
Authority: CN
Inventors: 罗昌斌
Original assignee: Guangdong Smart Bi Pipe Technology Co ltd
Current assignee: Guangdong Smart Bi Pipe Technology Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2022-06-03

Abstract

The invention discloses a composite pipe sealing interface structure which comprises a socket pipe body and a socket pipe body, wherein the socket pipe body comprises a socket inner pipe and a socket outer pipe coated outside the socket inner pipe, an insertion groove is formed between the left end part of the socket inner pipe and the left end part of the socket outer pipe, a socket section which protrudes out of the right end surface of the socket outer pipe and is inserted into the insertion groove is arranged at the right end of the socket inner pipe, a gap is reserved between the socket section and the socket inner pipe, a first sealing ring is arranged between the socket section and the socket inner pipe, a jacking structure is arranged on the inner side wall of the socket outer pipe, and the socket section is squeezed by the jacking structure when being inserted into the insertion groove so as to tightly press the first sealing ring. The socket section is inserted into the slot, and the socket section is extruded by the jacking structure to compress the first sealing ring, so that the sealing performance of the invention is improved.

Description

Sealing interface structure of composite pipe

Technical Field

The invention belongs to the technical field of pipelines, and particularly relates to a sealing interface structure of a composite pipe.

Background

In order to ensure the strength of the pipeline and simultaneously improve the sealing performance, the composite pipe is required to be transported. The cement-plastic composite pipe is a common one of composite pipes, is widely applied to various projects such as water supply and drainage and provides convenience for life of people.

The cement-plastic composite pipe is generally of a structure including an outer pipe of a reinforced cement structure and an inner plastic pipe disposed inside the outer pipe. Like common plastic pipes, the existing cement-plastic composite pipes still have poor sealing performance, and many cement-plastic composite pipes have water leakage.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a composite pipe sealing joint structure having excellent sealing performance.

The technical scheme adopted by the invention for solving the technical problem is as follows:

the utility model provides a compound pipe seals interface structure, includes bellmouth body and socket body, the bellmouth body include bellmouth inner tube and cladding in the bellmouth outer tube of bellmouth outer tube, the socket body include socket inner tube and cladding in the socket outer tube of bellmouth outer tube, the left end of socket inner tube and the left end of socket outer tube between form a slot, the right-hand member of bellmouth inner tube be provided with bulge in the right-hand member face of bellmouth outer tube and insert the bellmouth section in the slot, leave the clearance between bellmouth section and the socket inner tube and be provided with first sealing washer between the two, the inside wall of socket outer tube is provided with the roof pressure structure, the bellmouth section insert the slot time receive the extrusion of roof pressure structure in order to compress tightly first sealing washer.

Preferably, the pressing structure is a tapered section which is arranged on the inner side wall of the socket outer tube and gradually decreases from left to right.

Preferably, a first convex part is arranged on the inner side wall of the socket section, and the first sealing ring is fixed at the first convex part.

Preferably, a second convex part is arranged on the outer side wall of the socket inner pipe, and the second convex part can be abutted with the first convex part to limit the socket inner pipe from being separated from the socket inner pipe.

Preferably, the inner side wall of the right end of the socket section is provided with a first flat wall section, the outer side wall of the socket body is provided with a second flat wall section matched with the first flat wall section, a gap is reserved between the first flat wall section and the second flat wall section, a sealing groove is arranged between the first flat wall section and the second flat wall section, and the first sealing ring is installed in the sealing groove.

Preferably, a plurality of first tooth grooves are formed in the inner side wall of the socket section, a plurality of first gear shaping teeth are arranged on the outer side wall of the socket inner pipe, and the first gear shaping teeth are clamped into corresponding first tooth grooves to limit the socket inner pipe and the socket inner pipe to be separated.

Preferably, the spigot outer pipe and the socket outer pipe are both cement pipes, and the outer side walls of the spigot inner pipe and the socket inner pipe are both provided with relief structures capable of improving adhesive force to cement.

Preferably, the pressing structure is a convex portion which is arranged on the inner side wall of the socket outer tube and can press the socket section.

Preferably, first tooth's socket is the dovetail groove, the bottom surface of first tooth's socket is the concave arc face, the concave arc face be sphere or ellipsoid, the minor diameter of the ellipsoid that the ellipsoid was confirmed is 0.8 ~ 1 with the ratio of major diameter, first gear shaping is trapezoidal tooth, the top surface of first gear shaping be with the convex arc face of the bottom surface laminating of first tooth's socket, first gear shaping with between the left flank of first tooth's socket first gear shaping with all leave the clearance between the right flank of first tooth's socket.

Preferably, the inner side wall of the socket section is provided with a plurality of second gear slots which are in staggered fit with the first gear slots, the second gear slots are trapezoidal teeth, the outer side wall of the socket inner tube is provided with a plurality of second gear slots which are in fit with the second gear slots, the second gear slots are trapezoidal slots, the bottom surfaces of the second gear slots are spherical surfaces which are concentric with the bottom surfaces of the first gear slots or ellipsoidal surfaces which are concentric with the bottom surfaces of the first gear slots, the top surfaces of the second gear slots are convex arc surfaces which are attached to the bottom surfaces of the second gear slots, and gaps are reserved between the second gear slots and the left side surfaces of the second gear slots and between the second gear slots and the right side surfaces of the second gear slots.

The invention has the beneficial effects that: when the socket pipe body and the socket pipe body are connected together, the socket section is inserted into the slot, and the socket section is extruded by the jacking structure to compress the first sealing ring, so that the sealing performance of the invention is improved, and liquid leakage in the pipe or water accumulated outside the pipe can be effectively avoided from permeating into the pipe.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is an exploded view of embodiment 1 of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a schematic structural view of a composite pipe used to form example 1 of the present invention;

FIG. 5 is a schematic structural view of embodiment 2 of the present invention;

fig. 6 is an enlarged view of a portion B in fig. 5.

FIG. 7 is a schematic structural view of embodiment 3 of the present invention;

fig. 8 is an enlarged view of a portion C in fig. 7.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the descriptions referred to in this application as "preferred," "less preferred," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 8, the present invention provides three embodiments of a sealing interface structure of a composite pipe, wherein the common features of the three embodiments are as follows:

this compound pipe sealing interface structure includes bellmouth body 100 and socket body 200, bellmouth body 100 includes bellmouth inner tube 1 and cladding bellmouth outer tube 2 outside bellmouth inner tube 1, socket body 200 includes socket inner tube 3 and cladding socket outer tube 4 outside socket inner tube 3, form a slot 5 between the left end of socket inner tube 3 and the left end of socket outer tube 4, the right-hand member of bellmouth inner tube 1 is provided with the protrusion and inserts the bellmouth section 10 in slot 5 in the right-hand member face of bellmouth outer tube 2, leave the clearance between bellmouth section 10 and the socket inner tube 3 and be provided with first sealing washer 7 between the two, the inside wall of socket outer tube 4 is provided with the roof pressure structure, receive the extrusion of roof pressure structure when bellmouth section 10 inserts slot 5 in order to compress tightly first sealing washer 7.

The socket inner pipe 1 and the socket inner pipe 3 are made of PE, PP-R, PVC or HDPE, and the materials are soft and slightly elastic.

The spigot outer pipe 4 and the socket outer pipe 2 are made of rigid materials, such as reinforced cement structures or steel materials.

In a preferred scheme of the embodiment, the spigot outer pipe 4 and the socket outer pipe 2 are both cement pipes, and in order to improve the adhesion of the spigot inner pipe 3 and the socket inner pipe 1 to cement, the outer side walls of the spigot inner pipe 3 and the socket inner pipe 1 are both provided with a convex pattern structure. The relief structure may be annular ribs 20 arranged in a circumferential direction, may be helical ribs arranged in a circumferential direction, may be elongated ribs arranged in an axial direction, or the like.

The three embodiments differ as follows:

example 1

Fig. 1 to 4 show an embodiment 1 of the present invention, which has the following structure in addition to the common features described above:

in this embodiment, the pressing structure is a tapered section 41 disposed on the inner sidewall of the socket outer tube 4 and gradually reduced from left to right. When the socket pipe body 200 and the socket pipe body 100 are connected together, the socket section 10 is inserted into the slot 5, and at this time, the socket section 10 is pressed by the tapered section 41 to compress the first seal ring 7, thereby improving the sealing performance of the present invention.

In a specific aspect of this embodiment, a first protruding portion 14 is disposed on an inner side wall of the socket section 10, the first sealing ring 7 is fixed at the first protruding portion 14 by hot pressing or gluing, and the first sealing ring 7 protrudes from an inner side surface of the socket section 10.

Further, a second projection 34 is provided on the outer side wall of the socket inner tube 3, and the second projection 34 can abut against the first projection 14 to restrict the socket inner tube 3 from being detached from the socket inner tube 1.

Furthermore, a first tapered surface 31 which gradually expands from left to right is arranged on the outer side wall of the socket inner tube 3, a second tapered surface 32 which is attached to the first tapered surface 31 is arranged on the inner side wall of the socket inner tube 1, and a second sealing ring 6 is arranged between the first tapered surface 31 and the second tapered surface 32. The first conical surface 31 is provided with a groove, the second sealing ring 6 is fixed in the groove in a hot pressing or gluing mode, and the outer side surface of the second sealing ring 6 is in interference fit with the second conical surface 32. The socket section 10 of the socket inner pipe 1 is inserted into the slot 5, the socket inner pipe 3 is inserted into the socket inner pipe 1, the first conical surface 31 and the second conical surface 32 are attached, and the outer side surface of the second sealing ring 6 is attached to the second conical surface 32, so that the sealing performance can be further improved, and liquid in the pipe can be prevented from leaking or water outside the pipe can be prevented from permeating into the pipe.

Fig. 4 shows a composite pipe capable of being socket-jointed to form the above-described composite pipe joint structure, which is provided at one end with the above-described socket body 100 and at the other end with the above-described socket body 200.

Example 2

Fig. 5 to 6 show embodiment 2 of the present invention, which has the following structure in addition to the common features described above:

in this embodiment, the pressing structure is a tapered section 41 disposed on the inner sidewall of the socket outer tube 4 and gradually reduced from left to right.

The inside wall of socket section 10 right-hand member is provided with first flat wall section 15, is provided with the second flat wall section 35 with first flat wall section 15 complex on the lateral wall of socket body 200, leaves the clearance and is provided with seal groove 8 between the two between first flat wall section 15 and the second flat wall section 35, and first sealing washer 7 is installed in seal groove 8.

Specifically, the first flat wall section 15 and the second flat wall section 35 are provided with grooves at corresponding positions, and the two grooves together form the sealing groove 8.

Further, a plurality of first tooth sockets 16 are arranged on the inner side wall of the socket section 10, a plurality of first gear shaping teeth 36 are arranged on the outer side wall of the socket inner tube 3, and the first gear shaping teeth 36 are clamped into the corresponding first tooth sockets 16 to limit the socket inner tube 3 to be separated from the socket inner tube 1. The profile of the first gear tooth 36 may be triangular, trapezoidal, semi-circular, etc.

Example 3

Fig. 7 to 8 show embodiment 3 of the present invention, which has the following structure in addition to the common features described above:

in this embodiment, the pressing structure is a protrusion 42 disposed on the inner sidewall of the socket outer tube 4 and capable of pressing the socket section 11.

Be provided with the first tooth's socket 16 of a plurality of on the inside wall of socket section 10, be provided with the first gear shaping 36 of a plurality of on the outside wall of socket inner tube 3, first gear shaping 36 card goes into corresponding first tooth's socket 16 and breaks away from with the socket inner tube 1 with the restriction socket inner tube 3.

Further, the first tooth groove 16 is a trapezoidal groove, the bottom surface of the first tooth groove 16 is a concave arc surface, the concave arc surface is a spherical surface or an ellipsoidal surface, the ratio of the small diameter to the large diameter of the ellipsoid determined by the ellipsoidal surface is 0.8-1, the first gear shaping is a trapezoidal tooth, the top surface of the first gear shaping 36 is a convex arc surface attached to the bottom surface of the first tooth groove 16, and gaps are reserved between the first gear shaping 36 and the left side surface of the first tooth groove 16 and between the first gear shaping 36 and the right side surface of the first tooth groove 16.

The existing cement-plastic composite pipe bearing can form a fixed interface after being inserted together, can cause different degrees of geological settlement when the conditions of earthquake, underground water exhaustion, newly-built large buildings and the like occur, and at the moment, the interfaces of two pipelines can bend along with the fixed interface.

In the composite pipe sealing interface structure of the present embodiment, the bottom surface of the first tooth space 16 is taken as an example of a spherical surface, and the top surface of the first gear 36 is taken as a spherical surface attached thereto, and the spherical center P of the spherical surface is near the axis of the socket pipe body 100. In the event of geological subsidence, the pipe joints will be compressed and bent, and adjacent pipe joints will bend in different directions. Between adjacent pipelines, the socket inner pipe 3 and the bell mouth inner pipe 1 can relatively rotate for a certain angle around the spherical center P, so that the pipeline interface can bear larger bending deformation; in addition, since the bottom surface of the first tooth space 16 and the top surface of the first gear 36 are spherical surfaces that are fitted to each other, the socket inner tube 3 and the socket inner tube 1 are still tightly fitted after rotating at a certain angle relative to each other, which can effectively improve the sealing performance and the connection strength between the socket tube 100 and the socket tube 200.

Furthermore, a plurality of second gear shaping teeth 17 which are in staggered fit with the first gear shaping teeth 36 are arranged on the inner side wall of the socket section 10, the second gear shaping teeth 17 are trapezoidal teeth, a plurality of second gear grooves 37 which are in fit with the second gear shaping teeth 17 are arranged on the outer side wall of the inner socket pipe 3, the second gear grooves 37 are trapezoidal grooves, the bottom surfaces of the second gear grooves 37 are spherical surfaces which are concentric with the bottom surfaces of the first gear grooves 16 or ellipsoidal surfaces which are concentric with the bottom surfaces of the first gear grooves 16, the top surfaces of the second gear shaping teeth 17 are convex arc surfaces which are attached to the bottom surfaces of the second gear grooves 37, and gaps are reserved between the left side surfaces of the second gear shaping teeth 17 and the second gear grooves 37 and between the right side surfaces of the second gear shaping teeth 17 and the second gear grooves 37.

Preferably, the bottom surfaces of all the first tooth grooves 16 are on the same spherical surface, the bottom surfaces of all the second tooth grooves 37 are on the same spherical surface, and the bottom surfaces of the first tooth grooves 16 and the bottom surfaces of the second tooth grooves 37 are concentric. The cooperation of the top surface of the second gear shaping 17 and the bottom surface of the second tooth groove 37 can further improve the effect of rotational centering, and simultaneously improve sealing performance and joint strength.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications, equivalents, and other technical fields which are directly or indirectly applicable to the present invention and which are included in the present specification and the accompanying drawings are all within the scope of the present invention.

Claims

1. A composite pipe sealing interface structure comprises a socket pipe body (100) and a socket pipe body (200), and is characterized in that the socket pipe body (100) comprises a socket inner pipe (1) and a socket outer pipe (2) coated outside the socket inner pipe (1), the socket pipe body (200) comprises a socket inner pipe (3) and a socket outer pipe (4) coated outside the socket inner pipe (3), a slot (5) is formed between the left end of the socket inner pipe (3) and the left end of the socket outer pipe (4), a socket section (10) protruding out of the right end face of the socket outer pipe (2) and inserted into the slot (5) is arranged at the right end of the socket inner pipe (1), a gap is reserved between the socket section (10) and the socket inner pipe (3), a first sealing ring (7) is arranged between the socket section and the socket outer pipe, and a jacking structure is arranged on the inner side wall of the socket outer pipe (4), when the socket section (10) is inserted into the slot (5), the socket section is pressed by the jacking structure to press the first sealing ring (7).

2. The sealing joint structure for the composite pipe as claimed in claim 1, wherein the pressing structure is a tapered section (41) which is arranged on the inner side wall of the socket outer pipe (4) and gradually tapers from left to right.

3. A composite pipe sealing interface structure as claimed in claim 1, wherein said interface section (10) is provided with a first protrusion (14) on the inner sidewall, and said first sealing ring (7) is fixed at said first protrusion (14).

4. A composite pipe sealing interface structure as claimed in claim 3, wherein said spigot inner pipe (3) is provided with a second protrusion (34) on its outer side wall, said second protrusion (34) being capable of abutting said first protrusion (14) to restrict said spigot inner pipe (3) from disengaging from said socket inner pipe (1).

5. The composite pipe sealing interface structure according to claim 1, wherein a first flat wall section (15) is arranged on the inner side wall at the right end of the socket section (10), a second flat wall section (35) matched with the first flat wall section (15) is arranged on the outer side wall of the socket pipe body (200), a gap is left between the first flat wall section (15) and the second flat wall section (35), a sealing groove (8) is arranged between the first flat wall section and the second flat wall section, and the first sealing ring (7) is installed in the sealing groove (8).

6. The composite pipe sealing interface structure according to claim 1 or 5, wherein a plurality of first tooth grooves (16) are arranged on the inner side wall of the socket section (10), a plurality of first gear teeth (36) are arranged on the outer side wall of the socket inner pipe (3), and the first gear teeth (36) are clamped into the corresponding first tooth grooves (16) to limit the socket inner pipe (3) from being separated from the socket inner pipe (1).

7. The composite pipe sealing interface structure according to claim 1, wherein the spigot outer pipe (4) and the socket outer pipe (2) are both cement pipes, and the outer side walls of the spigot inner pipe (3) and the socket inner pipe (1) are both provided with a convex pattern structure capable of improving adhesion to cement.

8. The sealing joint structure for a composite pipe as claimed in claim 1, wherein the pressing structure is a protrusion (42) provided on the inner sidewall of the socket outer pipe (4) and capable of pressing the socket section (11).

9. The composite pipe sealing interface structure according to claim 6, wherein the first tooth socket (16) is a trapezoidal socket, the bottom surface of the first tooth socket (16) is a concave arc surface, the concave arc surface is a spherical surface or an ellipsoidal surface, the ratio of the minor diameter to the major diameter of the ellipsoid determined by the ellipsoidal surface is 0.8-1, the first inserted tooth is a trapezoidal tooth, the top surface of the first inserted tooth (36) is a convex arc surface attached to the bottom surface of the first tooth socket (16), and gaps are left between the first inserted tooth (36) and the left side surface of the first tooth socket (16) and between the first inserted tooth (36) and the right side surface of the first tooth socket (16).

10. The composite pipe sealing interface structure according to claim 9, wherein the inner side wall of the socket section (10) is provided with a plurality of second gear shaping teeth (17) which are in staggered fit with the first gear shaping teeth (36), the second gear shaping teeth (17) are trapezoidal teeth, the outer side wall of the socket inner pipe (3) is provided with a plurality of second gear shaping grooves (37) which are in fit with the second gear shaping teeth (17), the second gear shaping grooves (37) are trapezoidal grooves, the bottom surfaces of the second gear shaping grooves (37) are spherical surfaces which are concentric with the bottom surface of the first gear shaping groove (16) or ellipsoidal surfaces which are concentric with the bottom surface of the first gear shaping groove (16), the top surfaces of the second gear shaping teeth (17) are convex arc surfaces which are fitted with the bottom surface of the second gear shaping groove (37), and a space between the second gear shaping teeth (17) and the left side surface of the second gear shaping groove (37), And gaps are reserved between the second gear shaping (17) and the right side surface of the second tooth groove (37).