Super-strong flaring plastic corrugated pipe and super-strong flaring plastic corrugated pipe forming mold

Abstract

The utility model discloses a super-strong flaring plastic corrugated pipe and a super-strong flaring plastic corrugated pipe forming mould, two ends of a first main body flaring transition section of the super-strong flaring plastic corrugated pipe are respectively connected with a main body pipe and a short reinforcing section, and a long reinforcing section is connected with the short reinforcing section through a reinforcing transition section. The two ends of the second body flaring transition section are connected with the long reinforcing section and the connecting body pipe respectively, first annular reinforcing ribs are arranged on the pipe outer walls of the first body flaring transition section, the reinforcing transition section and the second body flaring transition section, and second annular reinforcing ribs and third annular reinforcing ribs are arranged on the pipe outer wall of the short reinforcing section. A plurality of fourth annular reinforcing ribs and fifth annular reinforcing ribs are arranged on the pipe outer wall of the long reinforcing section, the sections of the fourth annular reinforcing ribs and the fifth annular reinforcing ribs are trapezoidal, the section width of each fourth annular reinforcing rib is larger than that of each fifth annular reinforcing rib, and a plurality of fifth annular reinforcing ribs are arranged between every two adjacent fourth annular reinforcing ribs. The flaring strength is improved, and flaring deformation is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic double-wall corrugated pipes, and particularly relates to a super-strong flared plastic corrugated pipe and a forming die for the super-strong flared plastic corrugated pipe. Background Art

[0002] Plastic double-wall corrugated pipes are widely used in municipal drainage, sewage disposal projects, agricultural irrigation, diversion projects and other fields because of their advantages such as light weight, smooth inner wall, small flow resistance, high pressure resistance and corrosion resistance.

[0003] The conventional connection method of plastic double-wall corrugated pipes is to use a flared (also called socket) and a spigot for plug-in fit and install a sealing ring between the two. After producing a whole plastic double-wall corrugated pipe with a spigot and a flared end, it is necessary to cut off part of the pipe to form a spigot pipe and a socket pipe to meet the connection dimensions required by the customer, and then insert the spigot part into the socket to complete the construction.

[0004] According to market feedback, in the prior art, the strength of the flared (socket) is low, and in the above connection method, the flared end is prone to deformation during storage and transportation. The deformation of the flared end will affect the sealing effect during the plug-in of the flared end and the spigot, increasing the risk of water leakage at the pipe interface.

[0005] To solve the problems of low strength of the flared end of the double-wall corrugated pipe and deformation of the flared end during the plug-in of the flared end and the spigot in the double-wall corrugated pipe in the prior art, it is necessary to improve the structure of the traditional plastic double-wall corrugated pipe. Correspondingly, the traditional forming module cannot produce a new plastic corrugated pipe, so it is necessary to improve the traditional corrugated pipe forming module to form a new plastic double-wall corrugated pipe. Summary of the Utility Model

[0006] The first technical problem to be solved by the utility model is to provide a super-strong flared plastic corrugated pipe to solve the problem that the flared end of the connected double-wall corrugated pipe is prone to deformation during use.

[0007] As the same technical concept, the second technical problem to be solved by the utility model is to provide a forming die for the super-strong flared plastic corrugated pipe for manufacturing the super-strong flared plastic corrugated pipe.

[0008] To solve the above first technical problem, the utility model adopts the following technical solutions:

[0009] A super-strong flared plastic corrugated pipe, comprising a main pipe and a flared pipe integrally arranged, the main pipe comprising an inner wall and an outer wall, and wave crests and wave troughs arranged alternately on the outer wall;

[0010] The flared pipe comprises: a first main pipe flared transition section, a short strengthening section, a strengthening transition section, a long strengthening section and a second main pipe flared transition section connected in sequence,

[0011] One end of the first main body flaring transition section is connected to the main body pipe, and the other end is connected to the short strengthening section. The long strengthening section and the short strengthening section are connected through the strengthening transition section. The other end of the long strengthening section is connected to the second main body flaring transition section, and the other end of the second main body flaring transition section is connected to the main body pipe.

[0012] The inner diameter of the first main body flaring transition section gradually increases from the trough of the main body pipe to the short strengthening section.

[0013] The inner diameter of the second main body flaring transition section gradually increases from the trough of the main body pipe to the long strengthening section.

[0014] The inner diameter of the strengthening transition section gradually decreases from the short strengthening section to the long strengthening section.

[0015] First annular reinforcing ribs are arranged on the outer wall of the first main body flaring transition section, the strengthening transition section and the second main body flaring transition section.

[0016] Second annular reinforcing ribs and third annular reinforcing ribs are arranged at intervals on the outer wall of the short strengthening section.

[0017] A plurality of fourth annular reinforcing ribs and a plurality of fifth annular reinforcing ribs are arranged on the outer wall of the long strengthening section. The cross-sections of the fourth annular reinforcing ribs and the fifth annular reinforcing ribs are trapezoidal. The cross-sectional width of the fourth annular reinforcing rib is greater than the cross-sectional width of the fifth annular reinforcing rib. A plurality of the fifth annular reinforcing ribs are arranged between two adjacent fourth annular reinforcing ribs.

[0018] Preferably, the cross-section of the first annular reinforcing rib is arc-shaped.

[0019] Preferably, the cross-sections of the second annular reinforcing rib and the third annular reinforcing rib on the outer wall of the short strengthening section are rectangular cross-sections.

[0020] Preferably, the cross-sectional width of the third annular reinforcing rib is greater than the cross-sectional width of the second annular reinforcing rib, and the second annular reinforcing rib is used for the auxiliary cutting of the pipe material.

[0021] Preferably, a draft angle for facilitating demolding is arranged on the inner wall of the long strengthening section.

[0022] Preferably, during use, the part to be cut is cut off, and the part to be cut sequentially includes part of the main body pipe, the first main body flaring transition section and the second annular reinforcing rib.

[0023] Preferably, after cutting off the part to be cut, the flared pipe forms a socket, a part of the main pipe forms a spigot, the spigot is inserted into the socket, and a sealing ring is arranged between the trough of the spigot and the socket.

[0024] To solve the above-mentioned second technical problem, the present utility model adopts the following technical solutions:

[0025] A super-strong flared plastic corrugated pipe forming die, which is used to produce the above-mentioned super-strong flared plastic corrugated pipe. The forming die includes: a plurality of main body module groups for forming the main pipe and a plurality of flaring module groups for forming the flared pipe;

[0026] The cavity of the main body module group includes alternately arranged annular convex rings and annular concave rings. The annular convex rings form the troughs of the main pipe, and the annular concave rings form the peaks of the main pipe;

[0027] The cavity of the flaring module group includes: a first transition section cavity for forming the first main pipe flaring transition section, a short strengthening section cavity for forming the short strengthening section, a strengthening transition section cavity for forming the strengthening transition section, a long strengthening section cavity for forming the long strengthening section, and a second transition section cavity for forming the second main pipe flaring transition section.

[0028] Preferably, the first transition section cavity and the second transition section cavity are set as a first tapered pipe cavity. A plurality of arc-shaped inner concave rings for forming the first annular reinforcing ribs are arranged in the first tapered pipe cavity. The strengthening transition section cavity is set as a second tapered pipe cavity, and the arc-shaped inner concave rings for forming the first annular reinforcing ribs are arranged in the second tapered pipe cavity.

[0029] A rectangular inner concave ring one for forming the second annular reinforcing rib and a rectangular inner concave ring two for forming the third annular reinforcing rib are arranged on the inner wall of the short strengthening section cavity.

[0030] A trapezoidal inner concave ring one for forming the fourth annular reinforcing rib and a trapezoidal inner concave ring two for forming the fourth annular reinforcing rib are arranged on the inner wall of the long strengthening section cavity.

[0031] After adopting the above technologies, the beneficial effects of the present utility model are:

[0032] Due to the fact that one end of the first main body flare transition section of the super-strong flare plastic corrugated pipe of the present utility model is connected to the main body pipe, the other end is connected to the short reinforcement section, the long reinforcement section is connected to the short reinforcement section through the reinforcement transition section, the other end of the long reinforcement section is connected to the second main body flare transition section, and the other end of the second main body flare transition section is connected to the main body pipe. From the trough of the main body pipe to the short reinforcement section, the inner diameter of the first main body flare transition section gradually increases. From the trough of the main body pipe to the long reinforcement section, the inner diameter of the second main body flare transition section gradually increases. From the short reinforcement section to the long reinforcement section, the inner diameter of the reinforcement transition section gradually decreases. The connection between the above-mentioned pipe sections gradually transitions in terms of pipe diameter size, avoiding stress concentration, thereby avoiding pipeline cracking and improving the overall strength of the pipe material.

[0033] First annular reinforcing ribs are provided on the outer wall of the first main body flare transition section, the reinforcement transition section, and the second main body flare transition section. Second annular reinforcing ribs and third annular reinforcing ribs are spaced apart on the outer wall of the short reinforcement section. Multiple fourth annular reinforcing ribs and multiple fifth annular reinforcing ribs are provided on the outer wall of the long reinforcement section. The cross-sections of the fourth annular reinforcing ribs and the fifth annular reinforcing ribs are trapezoidal. The cross-sectional width of the fourth annular reinforcing rib is greater than the cross-sectional width of the fifth annular reinforcing rib. A number of fifth annular reinforcing ribs are provided between two adjacent fourth annular reinforcing ribs. Reinforcing ribs are respectively provided on the first main body flare transition section, the short reinforcement section, the reinforcement transition section, the long reinforcement section, and the second main body flare transition section of the flare pipe, improving the structural strength of the flare pipe and avoiding deformation of the flare pipe during insertion and use.

[0034] The super-strong flare plastic corrugated pipe manufactured by the forming die of the super-strong flare plastic corrugated pipe of the present utility model has high overall structural strength, especially improving the structural strength of the flare pipe and avoiding deformation of the flare pipe during use. It effectively solves the problems of low flare strength of ordinary pipe materials and easy deformation during storage and transportation. Brief Description of the Drawings

[0035] Figure 1 is a schematic longitudinal sectional structure view of the super-strong flare plastic corrugated pipe of the present utility model;

[0036] Figure 2 is a schematic structure view of the super-strong flare plastic corrugated pipe of the present utility model during connection and use;

[0037] Figure 3 is a schematic structure view of the forming die of the super-strong flare plastic corrugated pipe of the present utility model;

[0038] Figure 4 is a schematic structure view of a pair of opposite modules of the forming die of the super-strong flare plastic corrugated pipe of the present utility model during mold closing;

[0039] Figure 5 is Figure 3 a schematic enlarged structure view of the flare module group in;

[0040] In the figure: 1. Main body pipe; 101. Wave crest; 102. Wave trough; 2. Flared pipe; 201. First main body flaring transition section; 2011. First annular reinforcing rib; 202. Short reinforcing section; 2021. Second annular reinforcing rib; 2022. Third annular reinforcing rib; 203. Long reinforcing section; 2030. Reinforcing transition section; 2031. Fourth annular reinforcing rib; 2032. Fifth annular reinforcing rib; 204. Second main body flaring transition section; Q. Portion to be cut; 3. Sealing ring; A. Main body module group; B. Flaring module group; 401. Annular convex ring; 402. Annular concave ring; 501. First transition section cavity; 5011. Arc-shaped concave ring; 502. Short reinforcing section cavity; 503. Long reinforcing section cavity; 504. Second transition section cavity; 5021. First rectangular concave ring; 5022. Second rectangular concave ring; 5030. Reinforcing transition section cavity; 5031. First trapezoidal concave ring; 5032. Second trapezoidal concave ring; 6. Vacuum pumping channel; 7. Connecting groove; 8. Suction groove. Specific embodiments

[0041] The technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and efficacy of the present utility model, but it is not intended to limit the scope of protection of the appended claims of the present utility model.

[0042] As Figure 1 shown, the super flared plastic corrugated pipe includes a main body pipe 1 and a flared pipe 2 which are integrally arranged. The main body pipe 1 includes an inner wall and an outer wall, and wave crests 101 and wave troughs 102 are alternately arranged on the outer wall;

[0043] The flared pipe 2 includes: a first main body flaring transition section 201, a short reinforcing section 202, a reinforcing transition section, a long reinforcing section 203 and a second main body flaring transition section 204 which are connected in sequence,

[0044] One end of the first main body flaring transition section 201 is connected to the main body pipe 1 ( Figure 1 the main body pipe on the left side in the figure), the other end is connected to the short reinforcing section 202, the long reinforcing section 203 is connected to the short reinforcing section 202 through the reinforcing transition section 2030, the other end of the long reinforcing section 203 is connected to the second main body flaring transition section 204, and the other end of the second main body flaring transition section 204 is connected to the main body pipe 1 ( Figure 1 the main body pipe on the right side in the figure),

[0045] The inner diameter of the first main body flaring transition section 201 gradually increases from the wave trough 102 of the main body pipe 1 to the short reinforcing section 202, the inner diameter of the second main body flaring transition section 204 gradually increases from the wave trough 102 of the main body pipe 1 to the long reinforcing section 203, and the inner diameter of the reinforcing transition section 2030 gradually decreases from the short reinforcing section 202 to the long reinforcing section 203,

[0046] On the outer wall of the pipe of the first main body flaring transition section 201, the strengthening transition section 2030 and the second main body flaring transition section 204, a first annular strengthening rib 2011 is provided. On the outer wall of the pipe of the short strengthening section 202, a second annular strengthening rib 2021 and a third annular strengthening rib 2022 are arranged at intervals. On the outer wall of the pipe of the long strengthening section 203, a plurality of fourth annular strengthening ribs 2031 and a plurality of fifth annular strengthening ribs 2032 are provided. The cross-sections of the fourth annular strengthening ribs 2031 and the fifth annular strengthening ribs 2032 are trapezoidal. The cross-section width of the fourth annular strengthening rib 2031 is greater than the cross-section width of the fifth annular strengthening rib 2032. A number of fifth annular strengthening ribs 2032 are arranged between two adjacent fourth annular strengthening ribs 2031.

[0047] In some embodiments, the cross-section of the first annular strengthening rib 2011 is preferably arc-shaped. Different from the ordinary double-wall corrugated pipe flaring, the width and thickness of the first annular strengthening rib 2011 are increased, making its strength higher.

[0048] In some embodiments, the cross-sections of the second annular strengthening rib 2021 and the third annular strengthening rib 2022 on the outer wall of the pipe of the short strengthening section 202 are rectangular cross-sections. The cross-section width of the third annular strengthening rib 2022 is greater than the cross-section width of the second annular strengthening rib 2021. The second annular strengthening rib 2021 is used for the auxiliary cutting of the pipe, which can make the cut of the pipe more neat and beautiful. The setting of the third annular strengthening rib 2022 can not only enhance the strength of the flaring, prevent the flaring from deforming, but also avoid the deformation and cracking of the flaring during insertion.

[0049] Preferably, a draft angle for facilitating demolding is provided on the inner wall of the pipe of the long strengthening section 203.

[0050] In the present utility model, since the cross-section widths of the fourth annular strengthening ribs 2031 and the fifth annular strengthening ribs 2032 on the outer wall of the pipe of the long strengthening section 203 are different, these two annular strengthening ribs with different trapezoidal cross-sections are arranged according to a certain rule. Figure 1 In [the structure], between two adjacent fourth annular strengthening ribs 2031 on one section length of the long strengthening section 203, three fifth annular strengthening ribs 2032 are arranged. Between two adjacent fourth annular strengthening ribs 2031 on one section length, six fifth annular strengthening ribs 2032 are arranged. Between two adjacent fourth annular strengthening ribs 2031 on one section length, seven fifth annular strengthening ribs 2032 are arranged. That is, a number of fourth annular strengthening ribs 2031 with smaller cross-section widths are arranged on the fourth annular strengthening rib 2031 with a larger cross-section width, making its strength higher and reducing the inner wall depression. When two sections of pipes are inserted during use, this structure maintains a relatively high strength of the flared pipe 2 without affecting the sealing effect, greatly improving the overall strength of the pipe flaring.

[0051] After experiments, its strength is higher than that with only the fifth annular reinforcing rib 2032 provided, and also higher than that with only the fourth annular reinforcing rib 2031 provided.

[0052] During use, cut off the part to be cut, such as Figure 2 As shown, the part to be cut Q sequentially includes a part of the main body pipe 1, the first main body flare transition section 201, and the second annular reinforcing rib 2021. After cutting off the part to be cut, the flared pipe 2 forms a socket, and a part of the main body pipe 1 forms a spigot. The spigot is inserted into the socket, and a sealing ring 3 is provided between the trough 102 of the spigot and the socket. The sealing of the sealing ring 3 prevents leakage and seepage.

[0053] The super-flared plastic corrugated pipe of the present utility model has high flaring strength. After the plug-in connection, the flare is not easily deformed, and thus it will not cause poor sealing during plugging, resulting in water leakage at the pipe joint.

[0054] Such as Figures 3 to 5 The super-flared plastic corrugated pipe forming die shown is used to produce the above-mentioned super-flared plastic corrugated pipe. The forming die includes: a plurality of main body module groups A for forming the main body pipe 1 and a plurality of flare module groups B for forming the flared pipe 2; the cavity of the main body module group A includes alternately arranged annular convex rings 401 and annular concave rings 402. The annular convex ring 401 forms the trough 102 of the main body pipe 1, and the annular concave ring 402 forms the crest 101 of the main body pipe 1;

[0055] C The cavity of the flare module group B includes: a first transition section cavity 501 for forming the first main body flare transition section 201, a short strengthening section cavity 502 for forming the short strengthening section 202, a strengthening transition section cavity 5030 for forming the strengthening transition section 2030, a long strengthening section cavity 503 for forming the long strengthening section 203, and a second transition section cavity 504 for forming the second main body flare transition section 204.

[0056] Among them, the first transition section cavity 501 and the second transition section cavity 504 are set as a first tapered pipe cavity, and a plurality of arc-shaped inner concave rings 5011 for forming the first annular reinforcing rib 2011 are provided in the first tapered pipe cavity.

[0057] The strengthening transition section cavity 5030 is set as a second tapered pipe cavity, and arc-shaped inner concave rings 5011 for forming the first annular reinforcing rib 2011 are provided in the second tapered pipe cavity.

[0058] Rectangular inner concave ring one 5021 for forming the second annular reinforcing rib 2021 and rectangular inner concave ring two 5022 for forming the third annular reinforcing rib 2022 are provided on the inner wall of the short strengthening section cavity 502.

[0059] On the inner wall of the long reinforcing section cavity 503, there are a trapezoidal concave ring one 5031 for forming the fourth annular reinforcing rib 2031 and a trapezoidal concave ring two 5032 for forming the fourth annular reinforcing rib 2031.

[0060] As Figure 4 and Figure 5 shown, during molding, the inner cavity formed by the mating of two opposite modules is the mold inner cavity for forming the super-strong flared plastic corrugated pipe. A plurality of air suction grooves 8 and vacuum pumping channels 6 are provided in each module inner cavity. The plurality of air suction grooves 8 and vacuum pumping channels 6 communicate with each other through communication grooves 7. The cavity of the molding module communicates with the vacuum pumping channel 6, and the vacuum pumping channel 6 is connected to an external vacuum pump. When the super-strong flared plastic corrugated pipe is molded, it is necessary to evacuate the inner cavity so that the outer wall blank of the super-strong flared plastic corrugated pipe is adsorbed on the inner wall of the molding cavity to form a corrugated shape.

[0061] During operation, the molding module runs along a closed annular track and circulates in sequence, so as to continuously produce super-strong flared plastic corrugated pipes.

[0062] The super-strong flared plastic corrugated pipe molded by the super-strong flared plastic corrugated pipe molding die of the present utility model greatly improves the strength of the flared pipe. Moreover, it has the advantages of simple structure and convenient installation. It only needs to install this die on an ordinary double-wall corrugated pipe production line without replacing other parts.

[0063] The present utility model is not limited to the above embodiments. All improvements made based on the concept, principle, structure and method of the present utility model are within the protection scope of the present utility model.

Claims

1. A super-strong flared plastic corrugated pipe, comprising a main pipe and a flared pipe integrally provided, the main pipe comprising an inner wall and an outer wall, and the outer wall being provided with alternately arranged wave crests and wave troughs; characterized in that: The flared pipe comprises, in sequence: a first main pipe flaring transition section, a short strengthening section, a strengthening transition section, a long strengthening section, and a second main pipe flaring transition section, One end of the first main pipe flaring transition section is connected to the main pipe, and the other end is connected to the short strengthening section. The long strengthening section is connected to the short strengthening section through the strengthening transition section. The other end of the long strengthening section is connected to the second main pipe flaring transition section, and the other end of the second main pipe flaring transition section is connected to the main pipe, The inner diameter of the first main pipe flaring transition section gradually increases from the wave trough of the main pipe to the short strengthening section, The inner diameter of the second main pipe flaring transition section gradually increases from the wave trough of the main pipe to the long strengthening section, The inner diameter of the strengthening transition section gradually decreases from the short strengthening section to the long strengthening section, The outer walls of the first main pipe flaring transition section, the strengthening transition section, and the second main pipe flaring transition section are provided with first annular strengthening ribs, On the outer wall of the short strengthening section, there are second annular strengthening ribs and third annular strengthening ribs arranged at intervals, On the outer wall of the long strengthening section, there are a plurality of fourth annular strengthening ribs and a plurality of fifth annular strengthening ribs. The cross-sections of the fourth annular strengthening ribs and the fifth annular strengthening ribs are trapezoidal. The cross-section width of the fourth annular strengthening ribs is greater than the cross-section width of the fifth annular strengthening ribs, and a plurality of the fifth annular strengthening ribs are arranged between two adjacent fourth annular strengthening ribs.

2. The super flaring plastic corrugated pipe according to claim 1, wherein: The cross-section of the first annular strengthening rib is arc-shaped.

3. The super flaring plastic corrugated pipe according to claim 2, wherein: The cross-sections of the second annular strengthening rib and the third annular strengthening rib on the outer wall of the short strengthening section are rectangular cross-sections.

4. The super flaring plastic corrugated pipe according to claim 3, characterized in that: The cross-section width of the third annular strengthening rib is greater than the cross-section width of the second annular strengthening rib, and the second annular strengthening rib is used for the auxiliary cutting of the pipe material.

5. The super flaring plastic corrugated pipe according to claim 4, characterized in that: On the inner wall of the long strengthening section, a draft angle for facilitating demolding is provided.

6. The super flaring plastic corrugated pipe according to claim 1, characterized in that: During use, the to-be-cut part is cut off. The to-be-cut part sequentially comprises a part of the main pipe, the first main pipe flaring transition section, and the second annular strengthening rib.

7. The super flaring plastic corrugated pipe according to claim 6, characterized in that: After cutting off the to-be-cut part, the flared pipe forms a socket, a part of the main pipe forms a spigot, the spigot is inserted into the socket, and a sealing ring is arranged between the wave trough of the spigot and the socket.

8. A forming die for an ultra-strong flared plastic corrugated pipe, characterized in that: For producing the super-strong flared plastic corrugated pipe as claimed in claim 5, the forming die comprises: a plurality of main module groups for forming the main pipe and a plurality of flaring module groups for forming the flared pipe; The cavity of the main module group comprises alternately arranged annular convex rings and annular concave rings. The annular convex rings form the wave troughs of the main pipe, and the annular concave rings form the wave crests of the main pipe; The cavity of the flaring module group includes: a first transition section cavity for forming the first main body flaring transition section, a short strengthening section cavity for forming the short strengthening section, a strengthening transition section cavity for forming the strengthening transition section, a long strengthening section cavity for forming the long strengthening section, and a second transition section cavity for forming the second main body flaring transition section.

9. The super flaring plastic corrugated pipe forming die according to claim 8, characterized in that: The first transition section cavity and the second transition section cavity are arranged as a first conical tube cavity, and a plurality of arc-shaped concave rings for forming the first annular reinforcing rib are arranged in the first conical tube cavity. The strengthening transition section cavity is arranged as a second conical tube cavity, and the arc-shaped concave ring for forming the first annular reinforcing rib is arranged in the second conical tube cavity. A first rectangular concave ring for forming the second annular reinforcing rib and a second rectangular concave ring for forming the third annular reinforcing rib are arranged on the inner wall of the short strengthening section cavity. A first trapezoidal concave ring for forming the fourth annular reinforcing rib and a second trapezoidal concave ring for forming the fourth annular reinforcing rib are arranged on the inner wall of the long strengthening section cavity.

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