UPVC pipe connecting structure and method

Abstract

The invention belongs to the technical field of pipeline connection, and particularly relates to a UPVC pipe connecting structure and method.The UPVC pipe connecting structure comprises a connecting pipe, a first pressing pipe and a second pressing pipe, the first pressing pipe and the second pressing pipe are matched with the connecting pipe, and the first pressing pipe and the second pressing pipe are detachably installed at the two ends of the connecting pipe respectively; the opposite ends of the first pressing pipe and the second pressing pipe are each provided with a butt joint groove allowing the end of the connecting pipe to be inserted therein, the two ends of the connecting pipe are each provided with an outer protruding part of a circular truncated cone structure, and the opposite ends of the first pressing pipe and the second pressing pipe are each provided with an inner concave part matched with the outer protruding part. According to the pipeline connecting device, the two pressing pipes are arranged on the two to-be-connected pipelines in a sleeving mode correspondingly, then the fractures of the to-be-connected pipelines are heated and softened through a tool, then the outwards-protruding parts are inserted into the to-be-connected pipelines, so that the calibers of the fractures of the to-be-connected pipelines are expanded, and then the two ends of the connecting pipe are sleeved with the pressing pipes correspondingly and fixed; therefore, the firmness degree after connection is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and particularly relates to a connection structure and method for UPVC pipes. Background Art

[0002] UPVC pipe is a plastic pipe made of polyvinyl chloride (PVC) resin without plasticizer. Since it is non-conductive, it is not easy to undergo electrochemical reactions with acids, alkalis, and salts, and acids, alkalis, and salts are difficult to corrode it. Therefore, it does not require an external anti-corrosion coating and lining, which adds the advantages of corrosion resistance and good flexibility on the basis of the general properties of polyvinyl chloride. Thus, it is particularly suitable for water supply pipe networks.

[0003] During pipe laying or pipe fracture, it is necessary to connect the two ends of the pipes to be joined from the fracture of the pipe. At this time, a pipeline connection structure is required. The existing pipeline connection structure is generally a pipe slightly thicker than the pipes to be joined. The pipes to be joined are inserted into the pipe, and then the gap between the pipe and the pipes is filled with a waterproof tape to achieve the connection between the two. Such a pipeline connection structure is unstable after installation and is likely to cause the connection part to break again under external force or high water pressure. Therefore, corresponding improvements are made to solve this problem. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a connection structure and method for UPVC pipes.

[0005] A connection structure for UPVC pipes proposed by the present invention includes a connection pipe, a first pressing pipe and a second pressing pipe that are matched with the connection pipe. The first pressing pipe and the second pressing pipe are respectively detachably installed at both ends of the connection pipe. Opposite ends of the first pressing pipe and the second pressing pipe are both provided with docking grooves for inserting the ends of the connection pipe. Both ends of the connection pipe are provided with outward convex portions with a frustum structure, and opposite ends of the first pressing pipe and the second pressing pipe are both provided with inward concave portions that match the outward convex portions. The first pressing pipe and the second pressing pipe are respectively sleeved on two pipes to be joined. Then, the fracture of the pipes to be joined is heated and softened by a tool, and then the outward convex portions are inserted into the pipes to be joined, so that the diameter of the fracture of the pipes to be joined is expanded. Then, the first pressing pipe and the second pressing pipe are respectively sleeved on both ends of the connection pipe, and the first pressing pipe and the second pressing pipe are fixed to the connection pipe through a reinforcement component.

[0006] Preferably, the reinforcement component includes internal threads located on the first pressing pipe and the second pressing pipe and external threads located at both ends of the connection pipe. The first pressing pipe and the second pressing pipe are both connected to the connection pipe through the cooperation of the internal threads and the external threads.

[0007] Preferably, the reinforcement assembly includes multiple pairs of bolts and nuts. A plurality of circular holes are formed in the connecting pipe, the first pressing pipe and the second pressing pipe in an annular array. The bolts pass through the circular holes and are threadedly connected to the nuts to fix the first pressing pipe and the second pressing pipe to the connecting pipe.

[0008] Preferably, a sealing inner core is further included. The sealing inner core is made of a metal material and can be sleeved on the convex portion.

[0009] Preferably, a plurality of first outer positioning strips are provided on the circumferential outer wall of the sealing inner core in an annular array. When the first outer positioning strips expand the diameter of the pipeline to be connected, the first outer positioning strips will be embedded in the pipeline to be connected and form corresponding imprints on the pipeline to be connected.

[0010] Preferably, a plurality of first inner positioning strips are provided on the circumferential inner wall of the sealing inner core in an annular array. A plurality of outer positioning grooves corresponding to the first inner positioning strips are formed on the circumferential outer wall of the convex portion.

[0011] Preferably, a sealing outer core is further included. The sealing outer core is made of a metal material and is matched with the shape of the concave portion.

[0012] Preferably, a sealing outer core is further included. The sealing outer core is made of a metal material and is matched with the shape of the concave portion. A plurality of second inner positioning strips are provided on the circumferential inner wall of the sealing outer core in an annular array. When the sealing outer core is pressed against the softened pipeline to be connected, the second inner positioning strips will be embedded in the pipeline to be connected and form corresponding imprints on the pipeline to be connected. A plurality of second outer positioning strips are provided on the circumferential outer wall of the sealing outer core in an annular array. A plurality of inner positioning grooves corresponding to the second outer positioning strips are formed on the circumferential inner wall of the concave portion.

[0013] Preferably, sealing grooves of a T-shaped structure are formed in both the first pressing pipe and the second pressing pipe. End caps are inserted into the sealing grooves, and sealing rings are sleeved on the end caps and pressed in the sealing grooves.

[0014] The present invention also provides a connection method for a connection structure of UPVC pipes, including the following steps:

[0015] S1. Sleeve the first pressing pipe and the second pressing pipe onto two pipelines to be connected respectively, and then heat and soften the fracture of the pipeline to be connected by a tool;

[0016] S2. Then insert the convex part into the pipeline to be connected, so that the diameter at the fracture of the pipeline to be connected is expanded. Then, respectively put the first compression pipe and the second compression pipe on both ends of the connecting pipe;

[0017] S3. Fix the first compression pipe and the second compression pipe to the connecting pipe through the reinforcement component.

[0018] Compared with the prior art, the present invention provides a UPVC pipe connection structure and method, which have the following beneficial effects:

[0019] 1. A UPVC pipe connection structure and method. By providing two compression pipes and a connecting pipe, the first compression pipe and the second compression pipe are respectively sleeved on two pipelines to be connected. Then, heat and soften the fracture of the pipeline to be connected through a tool. Then insert the convex part into the pipeline to be connected, so that the diameter at the fracture of the pipeline to be connected is expanded. Then, respectively put the first compression pipe and the second compression pipe on both ends of the connecting pipe, and fix the first compression pipe and the second compression pipe to the connecting pipe through the reinforcement component, so that the first compression pipe and the second compression pipe press the pipeline to be connected onto the connecting pipeline, so that the pipeline connection structure can be firmly installed between two pipelines to be connected.

[0020] 2. A UPVC pipe connection structure and method. By providing the first reinforcement component, both the first compression pipe and the second compression pipe are connected to the connecting pipe through the cooperation of internal threads and external threads, so that the first compression pipe and the second compression pipe are detachably fixed to the connecting pipe.

[0021] 3. A UPVC pipe connection structure and method. By providing the second reinforcement component, pass the bolt through the round hole and thread it with the nut, and the first compression pipe and the second compression pipe can be fixed to the connecting pipe.

[0022] 4. A UPVC pipe connection structure and method. By providing a sealing inner core made of metal material, when there is no professional tool to heat and soften the fracture of the pipeline to be connected, the sealing inner core can be taken off, then directly heat the sealing inner core, and then put the fracture of the pipeline to be connected on the heated sealing inner core. After the sealing inner core cools down, it can be sleeved on the convex part, so as to facilitate the user to soften the pipeline to be connected.

[0023] 5. A UPVC pipe connection structure and method. By providing the first outer positioning strip, when the first outer positioning strip expands the diameter of the pipeline to be connected, the first outer positioning strip will be embedded in the pipeline to be connected and form corresponding imprints on the pipeline to be connected, so that the connection between the pipeline to be connected and the sealing inner core is firm and there will be no relative rotation. By providing the first inner positioning strip, the connection between the connecting pipe and the sealing inner core can be firm and there will be no relative rotation.

[0024] 6. A connection structure and method for UPVC pipes. By setting a sealing outer core, a partition can be formed between the pressing pipe and the pipe to be connected through the sealing outer core. In this way, there is no need to wait for the softened pipe to be connected to completely cool and harden before installing the pressing pipe, so that the softened part of the sealing outer core and the pipe to be connected hardens together, thereby increasing the strength of the flared part. And when the pressing pipe is rotated and fixed to the connecting pipe, direct wear between the pressing pipe and the pipe to be connected can be avoided, thus protecting both of them. When the pressing pipe is connected to the connecting pipe through the cooperation of bolts and nuts, a second inner positioning strip is also provided. When the sealing outer core is pressed against the softened pipe to be connected, the second inner positioning strip will embed into the pipe to be connected and form corresponding imprints on the pipe to be connected, thereby avoiding relative rotation between the sealing outer core and the pipe to be connected and making their connection more firm. And a second outer positioning strip is also provided. Since the pressing pipe and the connecting pipe are connected together by bolts and nuts in this case, when the sealing outer core is pressed, relative rotation of this connection structure on the pipe to be connected can be avoided through the second outer positioning strip and the inner positioning groove, thereby making their connection more firm.

[0025] 7. A connection structure and method for UPVC pipes. By setting an end cap, it is easier for the pressing pipe to move on the pipe to be connected through the sealing groove, thus making it more labor-saving when installing the pressing pipe. After the pressing pipe is installed, the end cap with a sealing ring can be inserted into the sealing groove to strengthen the sealing of the gap between the pressing pipe and the pipe to be connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is the overall structural schematic diagram of a connection structure for UPVC pipes proposed by the present invention;

[0027] Figure 2 FIG. is the disassembled schematic diagram of a connection structure for UPVC pipes proposed by the present invention;

[0028] Figure 3 FIG. is the sectional structural schematic diagram of a connection structure for UPVC pipes proposed by the present invention;

[0029] Figure 4 FIG. is the installation structural schematic diagram between the connecting pipe and the pressing pipe of a connection structure for UPVC pipes proposed by the present invention;

[0030] Figure 5 For the present invention Figure 4 FIG. is the enlarged structural schematic diagram at A of a connection structure for UPVC pipes proposed by the present invention;

[0031] Figure 6 FIG. is the installation structural schematic diagram between the sealing inner core and the connecting pipe of a connection structure for UPVC pipes proposed by the present invention;

[0032] Figure 7 Schematic diagram of the installation structure between the sealing outer core and the pressing pipe of a UPVC pipe connection structure proposed by the present invention;

[0033] Figure 8 Schematic diagram of the installation structure of the second inner positioning strip and the second outer positioning strip of a UPVC pipe connection structure proposed by the present invention;

[0034] Figure 9 Schematic diagram of the installation structure of the end cap of a UPVC pipe connection structure proposed by the present invention.

[0035] In the figure: 1, connecting pipe; 2, first pressing pipe; 3, second pressing pipe; 4, convex part; 5, concave part; 6, pipe to be connected; 7, internal thread; 8, external thread; 9, round hole; 10, bolt; 11, nut; 12, sealing inner core; 13, first outer positioning strip; 14, first inner positioning strip; 15, outer positioning groove; 16, sealing outer core; 17, second inner positioning strip; 18, second outer positioning strip; 19, inner positioning groove; 20, docking groove; 21, sealing groove; 22, end cap; 23, sealing ring. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] Refer to Figure 1-9, a UPVC pipe connection structure, including a connecting pipe 1 and a first pressing pipe 2 and a second pressing pipe 3 that are matched with the connecting pipe 1. The first pressing pipe 2 and the second pressing pipe 3 are respectively detachably installed at both ends of the connecting pipe 1. Docking grooves 20 for inserting the ends of the connecting pipe 1 are provided at the opposite ends of the first pressing pipe 2 and the second pressing pipe 3. Outer convex parts 4 with a frustum structure are provided at both ends of the connecting pipe 1. Inner concave parts 5 that match the outer convex parts 4 are provided at the opposite ends of the first pressing pipe 2 and the second pressing pipe 3. The first pressing pipe 2 and the second pressing pipe 3 are respectively sleeved on two pipes to be connected 6. Then, the cut ends of the pipes to be connected 6 are heated and softened by a tool. Then, the outer convex parts 4 are inserted into the pipes to be connected 6, so that the diameters of the cut ends of the pipes to be connected 6 are expanded. Then, the first pressing pipe 2 and the second pressing pipe 3 are respectively sleeved on both ends of the connecting pipe 1, and the first pressing pipe 2 and the second pressing pipe 3 are fixed to the connecting pipe 1 through a reinforcement assembly, so that the first pressing pipe 2 and the second pressing pipe 3 press the pipes to be connected 6 onto the connecting pipe 1, so that the pipe connection structure can be firmly installed between the two pipes to be connected 6.

[0039] Further, the reinforcement assembly includes internal threads 7 on the first pressing pipe 2 and the second pressing pipe 3 and external threads 8 at both ends of the connecting pipe 1. The first pressing pipe 2 and the second pressing pipe 3 are both connected to the connecting pipe 1 through the cooperation of the internal threads 7 and the external threads 8, so that the first pressing pipe 2 and the second pressing pipe 3 are detachably fixed to the connecting pipe 1.

[0040] Further, the reinforcement assembly includes multiple pairs of bolts 10 and nuts 11. A plurality of circular holes 9 distributed in an annular array are provided on the connecting pipe 1, the first pressing pipe 2 and the second pressing pipe 3. The bolts 10 pass through the circular holes 9 and are threadedly connected with the nuts 11, and the first pressing pipe 2 and the second pressing pipe 3 can be fixed to the connecting pipe 1.

[0041] Further, a sealing inner core 12 is also included. The sealing inner core 12 is made of a metal material. The sealing inner core 12 can be sleeved on the outer convex part 4. When there is no professional tool to heat and soften the cut end of the pipe to be connected 6, the sealing inner core 12 can be taken off, and then the sealing inner core 12 is directly heated. Then, the cut end of the pipe to be connected 6 is sleeved on the heated sealing inner core 12. After the sealing inner core 12 cools down, it can be sleeved on the outer convex part 4, so as to facilitate the user to soften the pipe to be connected 6.

[0042] Further, a plurality of first outer positioning strips 13 distributed in an annular array are provided on the circumferential outer wall of the sealing inner core 12. When the first outer positioning strips 13 expand the diameter of the pipe to be connected 6, the first outer positioning strips 13 will be embedded in the pipe to be connected 6 and form corresponding imprints on the pipe to be connected 6, so that the connection between the pipe to be connected 6 and the sealing inner core 12 is firm and there will be no relative rotation.

[0043] Further, a plurality of first inner positioning strips 14 distributed in an annular array are provided on the circumferential inner wall of the sealed inner core 12, and a plurality of outer positioning grooves 15 corresponding to the first inner positioning strips 14 are formed on the circumferential outer wall of the outer convex portion 4, so that the connection between the connecting pipe 1 and the sealed inner core 12 is firm and no relative rotation will occur.

[0044] Further, when the pressing pipe is connected to the connecting pipe 1 through the cooperation of the internal thread 7 and the external thread 8, it further includes a sealed outer core 16. The sealed outer core 16 is made of a metal material, and the shape of the sealed outer core 16 matches that of the inner concave portion 5. In this way, a partition can be formed between the pressing pipe and the pipe to be connected 6 through the sealed outer core 16, so that it is not necessary to wait for the softened pipe to be connected 6 to completely cool and harden before installing the pressing pipe, and the softened part of the sealed outer core 16 and the pipe to be connected 6 hardens together, thereby increasing the strength of the flared part. And when the pressing pipe 3 is rotated to be fixed to the connecting pipe 1, direct wear between the pressing pipe 3 and the pipe to be connected 6 can be avoided, thereby protecting both of them.

[0045] Further, when the pressing pipe is connected to the connecting pipe 1 through the cooperation of the bolt 10 and the nut 11, a plurality of second inner positioning strips 17 distributed in an annular array are also provided on the circumferential inner wall of the sealed outer core 16. When the sealed outer core 16 is pressed against the softened pipe to be connected 6, the second inner positioning strips 17 will be embedded in the pipe to be connected 6 and corresponding imprints will be formed on the pipe to be connected 6, thereby avoiding relative rotation between the sealed outer core 16 and the pipe to be connected 6 and making their connection more firm. A plurality of second outer positioning strips 18 distributed in an annular array are provided on the circumferential outer wall of the sealed outer core 16, and a plurality of inner positioning grooves 19 corresponding to the second outer positioning strips 18 are formed on the circumferential inner wall of the inner concave portion 5. Since the pressing pipe and the connecting pipe 1 are connected together by the bolt 10 and the nut 11 in this case, when the sealed outer core 16 is pressed, relative rotation of this connection structure on the pipe to be connected 6 can be avoided through the second outer positioning strips 18 and the inner positioning grooves 19, thereby making their connection more firm.

[0046] Further, a sealing groove 21 with a T-shaped structure is formed on both the first pressing pipe 2 and the second pressing pipe 3. An end cover 22 is inserted into the sealing groove 21, and a sealing ring 23 sleeved on the end cover 22 is pressed in the sealing groove 21. In this way, it is easier for the pressing pipe to move on the pipe to be connected 6 through the sealing groove 21, so that it is more labor-saving when installing the pressing pipe. After the pressing pipe is installed, the end cover 22 sleeved with the sealing ring 23 can be inserted into the sealing groove 21 to strengthen the sealing of the gap between the pressing pipe and the pipe to be connected 6.

[0047] The present invention also provides a connection method for a connection structure of UPVC pipes, including the following steps:

[0048] S1. Slip the first compression pipe 2 and the second compression pipe 3 onto two pipes 6 to be joined respectively. Then, heat and soften the fracture of the pipes 6 to be joined by means of a tool.

[0049] S2. Then, insert the convex part 4 into the pipes 6 to be joined, so that the diameter of the fracture of the pipes 6 to be joined is expanded. Then, slip the first compression pipe 2 and the second compression pipe 3 onto both ends of the connecting pipe 1 respectively.

[0050] S3. Fix the first compression pipe 2 and the second compression pipe 3 to the connecting pipe 1 by means of a reinforcement component.

[0051] As mentioned above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A UPVC pipe connection structure, comprising a connecting pipe (1) and a first compression pipe (2) and a second compression pipe (3) matched with the connecting pipe (1), characterized in that: The first compression tube (2) and the second compression tube (3) are respectively detachably mounted on the two ends of the connecting tube (1); the first compression tube (2) and the second compression tube (3) are provided with a docking groove (20) at the opposite ends thereof for the end of the connecting tube (1) to be inserted; both ends of the connecting tube (1) are provided with an outer convex portion (4) of a truncated cone structure; the first compression tube (2) and the second compression tube (3) are provided with an inner concave portion (5) matching the outer convex portion (4); the first compression tube (2) and the second compression tube (3) are provided with an inner concave portion (5) matching the outer convex portion (4); ) and the second compression tube (3) are respectively inserted into the two pipes to be connected (6), then the fracture of the pipe to be connected (6) is heated and softened by a tool, and then the outer protrusion (4) is inserted into the pipe to be connected (6) so that the diameter of the fracture of the pipe to be connected (6) is expanded, and then the first compression tube (2) and the second compression tube (3) are respectively inserted into the two ends of the connecting pipe (1), and the first compression tube (2) and the second compression tube (3) are fixed to the connecting pipe (1) by a reinforcement component.

2. A UPVC pipe connection structure according to claim 1, characterized in that: The reinforcement component comprises internal threads (7) located on the first compression tube (2) and the second compression tube (3) and external threads (8) located at both ends of the connecting tube (1); the first compression tube (2) and the second compression tube (3) are connected to the connecting tube (1) by the cooperation of the internal threads (7) and the external threads (8).

3. A UPVC pipe connection structure according to claim 1, characterized in that: The reinforcement assembly comprises a plurality of pairs of bolts (10) and nuts (11); the connecting tube (1), the first compression tube (2) and the second compression tube (3) are each provided with a plurality of circular holes (9) distributed in an annular array; the bolts (10) pass through the circular holes (9) and are threadedly connected to the nuts (11) to fix the first compression tube (2) and the second compression tube (3) to the connecting tube (1).

4. A UPVC pipe connection structure according to claim 1, characterized in that: It also comprises a sealing inner core (12), wherein the sealing inner core (12) is made of a metal material, and the sealing inner core (12) can be sleeved on the outer protrusion (4).

5. A UPVC pipe connection structure according to claim 4, characterized in that: The circumferential outer wall of the sealing inner core (12) is provided with a plurality of first outer positioning strips (13) distributed in a circular array. When the first outer positioning strips (13) expand the diameter of the pipe (6) to be connected, the first outer positioning strips (13) will be embedded in the pipe (6) to be connected and form corresponding marks on the pipe (6) to be connected.

6. A UPVC pipe connection structure according to claim 4, characterized in that: The circumferential inner wall of the sealing inner core (12) is provided with a plurality of first inner positioning strips (14) distributed in a circular array, and the circumferential outer wall of the outer protrusion (4) is provided with a plurality of outer positioning grooves (15) corresponding to the first inner positioning strips (14).

7. A UPVC pipe connection structure according to claim 2, characterized in that: It also comprises a sealing outer core (16), wherein the sealing outer core (16) is made of a metal material, and the shape of the sealing outer core (16) matches that of the inner recess (5).

8. A UPVC pipe connection structure according to claim 3, characterized in that: The invention also comprises a sealing outer core (16), wherein the sealing outer core (16) is made of a metal material, and the shape of the sealing outer core (16) matches that of the inner recess (5). The circumferential inner wall of the sealing outer core (16) is provided with a plurality of second inner positioning strips (17) distributed in an annular array. When the sealing outer core (16) is pressed against the softened pipe (6) to be connected, the second inner positioning strips (17) will be embedded in the pipe (6) to be connected and form corresponding marks on the pipe (6) to be connected. The circumferential outer wall of the sealing outer core (16) is provided with a plurality of second outer positioning strips (18) distributed in an annular array, and the circumferential inner wall of the inner recess (5) is provided with a plurality of inner positioning grooves (19) corresponding to the second outer positioning strips (18).

9. A UPVC pipe connection structure according to claim 1, characterized in that: The first compression tube (2) and the second compression tube (3) are both provided with a T-shaped sealing groove (21), an end cover (22) is inserted into the sealing groove (21), and a sealing ring (23) is sleeved on the end cover (22) and is compressed in the sealing groove (21).

10. A method for connecting a UPVC pipe connection structure according to any one of claims 1 to 9, characterized in that: The steps include: S1, inserting the first compression tube (2) and the second compression tube (3) respectively onto two pipes to be connected (6), and then heating and softening the fractures of the pipes to be connected (6) by using a tool; S2, then inserting the outer protrusion (4) into the pipe to be connected (6), so that the diameter of the fracture of the pipe to be connected (6) is expanded, and then the first compression tube (2) and the second compression tube (3) are respectively sleeved on the two ends of the connecting tube (1); S3. Fix the first compression tube (2) and the second compression tube (3) to the connecting tube (1) by means of a reinforcement assembly.

Images