Pressure-resistant PVC (polyvinyl chloride) pipe

Abstract

The invention discloses a pressure-resistant PVC pipe, and relates to the technical field of PVC pipe bodies, the pressure-resistant PVC pipe comprises an outer pipe, a reinforcing assembly and an inner pipe assembly, the circumferential inner wall of the outer pipe is fixedly connected with the reinforcing assembly, the circumferential inner wall of the reinforcing assembly is fixedly connected with the inner pipe assembly, the reinforcing assembly is arranged outside the inner pipe assembly, and the inner pipe assembly is fixedly connected with the outer pipe. The outer pipe is arranged outside the reinforcing assembly, the inner pipe assembly comprises a straight pipe, a first injection molding layer is arranged on the circumferential outer wall of the straight pipe, arc-shaped pipes are arranged on the circumferential inner wall of the straight pipe, and the arc-shaped pipes are distributed in the straight pipe at equal intervals; the straight pipe, the first injection molding layer and the arc-shaped pipe are all integrally formed through injection molding, the pipe body can have good pressure resistance, other materials do not need to be compounded, the production efficiency of the PVC pipe body is guaranteed while the pressure resistance strength of the PVC pipe body is improved, and the use requirements of people are met.

Description

Technical Field

[0001] The invention relates to the technical field of PVC pipe bodies, and in particular to a pressure-resistant PVC pipe material. Background Art

[0002] PVC pipe is the full name of polyvinyl chloride pipe. It is a kind of pipe made of polyvinyl chloride resin as the main raw material, with stabilizers, lubricants and other auxiliary materials added, and is extruded or injection molded by hot pressing. PVC pipe has been widely used in many fields such as construction, industry and agriculture due to its diverse characteristics and wide range of uses.

[0003] After searching, the Chinese patent with publication number "CN212584448U" discloses a PVC pipe pressure-resistant structure, including a pipe body, a wear-resistant layer, a longitudinal reinforcement strip, a transverse reinforcement strip, a reinforcement groove, an adhesive layer, a steel wire PVC layer, a PVC anti-corrosion layer and an inner pipe. The above device effectively improves the pressure resistance of the PVC pipe, facilitates daily use, reduces the impact of scratches on the PVC pipe, and effectively prevents the PVC pipe from delamination and falling off.

[0004] Based on the existing technology, it is found that the above device still has the following deficiencies: it mainly improves the pressure resistance of the entire PVC pipe body by compounding a steel wire mesh inside the pipe body. The composite steel wire mesh is fixedly connected to the pipe body by fixing glue, which makes the entire production process of the PVC pipe too cumbersome and complicated. At the same time, the service life of glue is limited. It is easy for the glue to fail and the steel wire mesh to detach during the long-term use of the PVC pipe. Although the steel wire mesh itself has a good bending resistance effect, its pressure resistance support capacity is limited and it cannot play a good reinforcement role for the entire PVC pipe. Therefore, a pressure-resistant PVC pipe is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a pressure-resistant PVC pipe. Its advantage is that it can make the pipe body have good pressure resistance, and it can be achieved without compounding other materials. While improving the pressure resistance of the PVC pipe body itself, it also ensures its production efficiency and meets people's use needs.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A pressure-resistant PVC pipe, comprising an outer pipe, a reinforcement assembly and an inner pipe assembly, wherein the circumferential inner wall of the outer pipe is fixedly connected to the reinforcement assembly, the circumferential inner wall of the reinforcement assembly is fixedly connected to the inner pipe assembly, the reinforcement assembly is arranged outside the inner pipe assembly, and the outer pipe is arranged outside the reinforcement assembly;

[0008] The inner tube assembly comprises a straight tube, a first injection-molded layer is provided on a circumferential outer wall of the straight tube, an arc-shaped tube is provided on a circumferential inner wall of the straight tube, the arc-shaped tubes are distributed at equal distances inside the straight tube, the straight tube, the first injection-molded layer, and the arc-shaped tubes are all integrally formed by injection molding, the straight tube is fixedly connected to the reinforcement assembly by the first injection-molded layer, and the straight tube, the first injection-molded layer, and the arc-shaped tube are all stably connected to the reinforcement assembly by the first injection-molded layer, and the straight tube, the first injection-molded layer, and the arc-shaped tube are all integrally formed by injection molding, thereby improving the production efficiency of the entire inner tube assembly;

[0009] An inner tube body is arranged inside the straight tube, and the inner tube body includes an annular convex portion and a tube body middle section which are equidistantly distributed inside the straight tube, and the tube body middle section is arranged in the middle of the two groups of annular convex portions, and the annular convex portion is fixedly connected to the circumferential inner wall of the straight tube, and the side of the arc tube away from the straight tube is fixedly connected to the circumferential outer wall of the tube body middle section, and the cross section of the inner tube body is in the shape of a bamboo joint, and when the inner tube assembly located in the middle of the PVC pipe is subjected to external pressure, the annular convex portion in the inner tube body will first bear the pressure, and at the same time, each annular convex portion will be fixedly connected to the circumferential outer wall of the straight tube. The convex part is equivalent to a lateral torsion box, which can resist the torque in the horizontal direction, and at the same time greatly improves the lateral anti-extrusion and anti-shearing ability of the inner tube body, so that the inner tube body has good pressure-bearing capacity, and has a good auxiliary pressure-bearing effect on the reinforcement component, further improving the pressure resistance of the entire PVC pipe. The force on the relatively fragile middle section of the entire inner tube body is much smaller than the annular convex parts at both ends. At the same time, the arc tube can also provide good support and reinforcement for the middle section of the tube body, reducing the probability of damage to the middle section of the tube body.

[0010] Through the above technical scheme: the pipe body can have good pressure resistance, and it can be achieved without compounding other materials. While improving the pressure resistance of the PVC pipe body itself, it also ensures its production efficiency and meets people's use needs.

[0011] The present invention is further configured such that the reinforcement assembly includes a reinforcement frame, the cross section of the reinforcement frame is a regular hexagon, a plurality of groups of the reinforcement frames are surrounded by a reinforcement tube, and the reinforcement tube is arranged outside the inner tube assembly.

[0012] Through the above technical solution: when the hexagonal structure is subjected to external force, the force can be evenly dispersed to each side and adjacent hexagons, similar to the effect of a spring, thereby achieving a good force unloading effect and reducing the damage to the PVC pipe when it is subjected to the extrusion force. At the same time, the reinforcement frame of the hexagonal structure can provide the largest area under the condition of fixed circumference, so that the reinforcement frame can provide a larger support area, thereby improving the overall strength of the structure.

[0013] The present invention is further configured such that the inner wall of the reinforcement frame is respectively fixedly connected with a first partition and a second partition, the first partition and the reinforcement frame form a first injection molding groove, the second partition and the reinforcement frame form a second injection molding groove, and the first injection molding layer is filled in the interior of the first injection molding groove.

[0014] Through the above technical solution: it is possible to effectively ensure that the various components of the PVC pipe are tightly connected.

[0015] The present invention is further configured such that the interior of the second injection molding groove is filled with a second injection molding layer, and the outer tube is fixedly connected to the reinforcement component through the second injection molding layer.

[0016] Through the above technical solution: the outer tube is fixedly connected to the reinforcing component through the second injection molding layer, which ensures that the outer tube can be tightly connected to the reinforcing component and improves the integrity of the PVC pipe.

[0017] The present invention is further configured such that one side of the first partition plate, one side of the second partition plate and the inner wall of the reinforcement frame form a cavity.

[0018] Through the above technical solution: the cavity set in the middle of the reinforcement frame prevents the external force from being concentrated on a certain point, but is dispersed throughout the entire reinforcement tube structure, thereby effectively reducing local stress concentration and improving the compressive resistance of the structure.

[0019] The present invention is further configured such that the outer walls of one side of the first partition and the second partition are fixedly connected with reinforcing plates that are equidistantly distributed in a circle, and the middle parts of the outer walls of the first partition and the second partition are fixedly connected with a central support tube, and the cross-section of the central support tube is a regular hexagon.

[0020] Through the above technical solution: by setting the reinforcing plates and the central support tube on the outer walls of the partitions on both sides of the reinforcing frame, the strength of the reinforcing frame can be further improved, and the strength and compressive resistance of the reinforcing tube formed by bending the reinforcing frame can be further improved.

[0021] The present invention is further configured such that a first through hole is opened on an outer wall of one side of the reinforcing plate, the first through holes are distributed at equal distances on the outer wall of one side of the reinforcing plate, and second through holes are opened on the six outer walls of the central support tube.

[0022] Through the above technical solution: during the injection molding process of the inner tube assembly, the injection material can flow through the first through hole and the second through hole. When the injection material is cooled and formed, the inner tube assembly and the reinforcement plate and the center support tube can be interlaced and fixed, thereby ensuring the stability of the connection between the inner tube assembly and the reinforcement assembly.

[0023] The present invention is further configured such that an annular groove is provided on one side outer wall of the first partition plate and the second partition plate, and the annular groove is distributed in an equidistant circular pattern on one side outer wall of the first partition plate and the second partition plate.

[0024] Through the above technical solution: after the injection molding material flowing into the annular groove is cooled, the first injection molding layer and the second injection molding layer can be embedded into the first partition and the second partition on both sides of the reinforcement frame, thereby ensuring the connection strength between the inner tube assembly, the outer tube and the reinforcement frame.

[0025] The present invention is further configured as follows: a buffer tube is provided on the outside of the outer tube, and a buffer plate which is equidistantly distributed in a circle is fixedly connected to the circumferential inner wall of the buffer tube, and the buffer plate includes an end and a head, and the end is fixedly connected to the circumferential inner wall of the buffer tube, and the cross-section of the head is teardrop-shaped, and a buffer seat which is equidistantly distributed in a circle is fixedly connected to the circumferential outer wall of the outer tube, and the buffer seat includes a convex portion and a groove portion, and one group of the groove portions is located in the middle of the two groups of the convex portions, and the head is inserted into the inside of the groove portion, and the spacing between the two side edges of the groove portion gradually decreases in the direction away from the head.

[0026] Through the above technical solution: when the PVC pipe is subjected to pressure, the buffer tube will absorb it first. At this time, the head of the buffer plate on the circumferential inner wall of the buffer tube will go deeper into the groove of the buffer seat. The friction force of the head inserted into the groove can absorb and convert the pressure. At the same time, since the spacing between the two side edges of the groove gradually decreases in the direction away from the head, the friction resistance of the head inserted into the inside of the groove becomes larger and larger, thereby ensuring the pressure resistance of the entire buffer tube.

[0027] The present invention is further configured such that the circumferential inner wall of the buffer tube, the outer wall of one side of the buffer plate, and the outer side of one side of the buffer seat together surround a filling groove, a filling layer is arranged inside the filling groove, and the filling layer is distributed in an equidistant circle inside the buffer tube.

[0028] Through the above technical solution: the filling layer is made of elastic material, so that the buffer tube has good shock-absorbing and buffering effect and a certain rebound ability.

[0029] The beneficial effects of the present invention are:

[0030] 1. In the present invention, since the reinforcing assembly is arranged in the middle of the PVC pipe, it includes a plurality of reinforcing frames with regular hexagonal cross sections bent into a reinforcing pipe. When the hexagonal structure is subjected to external force, the force can be evenly dispersed to each side and adjacent hexagons, similar to the effect of a spring, thereby achieving a good force unloading effect, reducing the damage to the PVC pipe at the moment of being subjected to the extrusion force. At the same time, the reinforcing frame of the hexagonal structure can provide the largest area under the condition of a fixed perimeter, so that the reinforcing frame can provide a larger support area, thereby improving the overall strength of the structure;

[0031] 2. The cavity set in the middle of the reinforcement frame prevents the external force from being concentrated on a certain point, but is dispersed throughout the entire reinforcement pipe structure, thereby effectively reducing local stress concentration and improving the compressive resistance of the structure. The reinforcement component can play a good supporting and reinforcing role in the middle of the PVC pipe, ensuring the pressure resistance of the entire PVC pipe and meeting people's use needs;

[0032] 3. In the present invention, when the inner tube assembly located in the middle of the PVC pipe is subjected to external pressure, the annular convex part in the inner tube body will first bear the pressure, and each annular convex part is equivalent to a lateral torsion box, which can resist the torque in the horizontal direction, and at the same time greatly improves the lateral anti-extrusion and anti-shearing ability of the inner tube body, so that the inner tube body has good pressure bearing capacity, plays a good auxiliary pressure bearing effect on the reinforcement assembly, and further improves the pressure resistance of the entire PVC pipe;

[0033] 4. In the present invention, the strength of the reinforcement frame can be further improved. Specifically, by providing a reinforcement plate and a central support tube, the strength of the reinforcement frame can be further improved, and the strength and compressive strength of the reinforcement tube formed by bending the reinforcement frame can be further improved;

[0034] 5. During the injection molding process of the inner tube assembly, the injection molding material can flow through the first through hole and the second through hole. When the injection molding material is cooled and formed, the inner tube assembly and the reinforcement plate and the center support tube can be interlaced and fixed, thereby ensuring the stability of the connection between the inner tube assembly and the reinforcement assembly. After the injection molding material that flows into the annular groove is cooled, the first injection molding layer and the second injection molding layer can be embedded in the first partition plate and the second partition plate on both sides of the reinforcement frame, thereby ensuring the connection strength between the inner tube assembly, the outer tube and the reinforcement frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall front structure of a pressure-resistant PVC pipe proposed by the present invention;

[0036] Figure 2 This is a schematic diagram of the overall half-section structure of a pressure-resistant PVC pipe proposed by the present invention;

[0037] Figure 3 A pressure-resistant PVC pipe proposed by the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0038] Figure 4 This is a schematic diagram of the disassembled structure of the components of a pressure-resistant PVC pipe proposed by the present invention;

[0039] Figure 5 This is a schematic diagram of a partial cross-sectional structure of a reinforcement component of a pressure-resistant PVC pipe proposed by the present invention after unfolding;

[0040] Figure 6 A pressure-resistant PVC pipe proposed by the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0041] Figure 7 This is a structural schematic diagram of Example 2 of a pressure-resistant PVC pipe proposed by the present invention;

[0042] Figure 8 A pressure-resistant PVC pipe proposed by the present invention Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0043] Fig. 9 This is a schematic structural diagram of a pressure-resistant PVC pipe embodiment 3 proposed by the present invention;

[0044] Fig.10 A pressure-resistant PVC pipe proposed by the present invention Fig. 9 Schematic diagram of the enlarged structure at D in the middle.

[0045] In the figure: 1. outer tube; 2. reinforcement assembly; 2001. reinforcement frame; 2002. first partition; 2003. second partition; 2004. first injection molding groove; 2005. second injection molding groove; 2006. cavity; 2007. reinforcement plate; 2008. first through hole; 2009. center support tube; 2010. second through hole; 2011. annular groove; 3. inner tube assembly; 3001. annular convex part; 3002. middle part of tube body; 3003. arc tube; 3004. straight tube; 3005. first injection molding layer; 4. second injection molding layer; 5. buffer tube; 6. filling layer; 7. buffer plate; 7001. end part; 7002. head part; 8. buffer seat; 8001. groove part; 8002. convex block part. DETAILED DESCRIPTION

[0046] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] Example 1

[0049] Reference Figure 1-Figure 6 A pressure-resistant PVC pipe comprises an outer pipe 1, a reinforcement component 2 and an inner pipe component 3, wherein the circumferential inner wall of the outer pipe 1 is fixedly connected to the reinforcement component 2, the circumferential inner wall of the reinforcement component 2 is fixedly connected to the inner pipe component 3, the reinforcement component 2 is arranged outside the inner pipe component 3, and the outer pipe 1 is arranged outside the reinforcement component 2;

[0050] The inner tube component 3 includes a straight tube 3004, a first injection layer 3005 is provided on the circumferential outer wall of the straight tube 3004, an arc tube 3003 is provided on the circumferential inner wall of the straight tube 3004, and the arc tubes 3003 are distributed at equal distances inside the straight tube 3004. The straight tube 3004, the first injection layer 3005, and the arc tubes 3003 are all integrally formed by injection molding. The straight tube 3004 is fixedly connected to the reinforcing component 2 through the first injection layer 3005. The first injection layer 3005 can not only stably connect the straight tube 3004, the first injection layer 3005, and the arc tube 3003 to the reinforcing component 2, but also the straight tube 3004, the first injection layer 3005, and the arc tube 3003 are integrally formed by injection molding, thereby improving the production efficiency of the entire inner tube component 3;

[0051] An inner tube body is arranged inside the straight tube 3004, and the inner tube body includes annular protrusions 3001 and a tube body middle section 3002 which are evenly distributed inside the straight tube 3004, and the tube body middle section 3002 is arranged in the middle of the two groups of annular protrusions 3001, and the annular protrusions 3001 are fixedly connected to the circumferential inner wall of the straight tube 3004, and the side of the arc tube 3003 away from the straight tube 3004 is fixedly connected to the circumferential outer wall of the tube body middle section 3002, and the cross section of the inner tube body is in the shape of a bamboo joint. When the inner tube assembly 3 located in the middle of the PVC pipe is subjected to external pressure, the annular protrusions 3001 in the inner tube body will first bear the pressure, and at the same time, each annular protrusion 3 001 (equivalent to the bamboo node in bamboo) is equivalent to a lateral torsion box, which can resist torque in the horizontal direction, and at the same time greatly improves the lateral anti-extrusion and anti-shear capabilities of the inner tube body, so that the inner tube body has good pressure-bearing capacity, and has a good auxiliary pressure-bearing effect on the reinforcement component 2, further improving the pressure resistance of the entire PVC pipe. The force on the relatively fragile middle section 3002 of the entire inner tube body is much smaller than the annular convex parts 3001 at both ends. At the same time, the arc tube 3003 can also provide good support and reinforcement for the middle section 3002 of the tube body, reducing the probability of damage to the middle section 3002 of the tube body.

[0052] In order to ensure that the entire PVC pipe has good compressive performance, refer to Figure 4-Figure 6 The reinforcement component 2 includes a reinforcement frame 2001, the cross section of the reinforcement frame 2001 is a regular hexagon, and multiple groups of reinforcement frames 2001 are surrounded by a reinforcement tube, which is arranged on the outside of the inner tube component 3. When the hexagonal structure is subjected to external force, the force can be evenly dispersed to each side and adjacent hexagons, which is similar to the effect of a spring, thereby achieving a good force unloading effect and reducing the damage to the PVC pipe when it is subjected to the extrusion force. At the same time, the reinforcement frame 2001 with a hexagonal structure can provide the largest area under the condition of a fixed circumference, so that the reinforcement frame 2001 can provide a larger support area, thereby improving the overall strength of the structure.

[0053] In order to ensure the tight connection between the components of the PVC pipe, refer to Figure 4-Figure 6 The inner wall of the reinforcement frame 2001 is respectively fixedly connected with the first partition 2002 and the second partition 2003, the first partition 2002 and the reinforcement frame 2001 form a first injection molding groove 2004, the second partition 2003 and the reinforcement frame 2001 form a second injection molding groove 2005, the first injection molding layer 3005 is filled in the first injection molding groove 2004, and the second injection molding groove 2005 is filled with the second injection molding layer 4, the outer tube 1 is fixedly connected to the reinforcement component 2 through the second injection molding layer 4, ensuring that the outer tube 1 can be tightly connected to the reinforcement component 2, thereby improving the integrity of the PVC pipe.

[0054] In order to further improve the pressure resistance of the reinforcement component 2, refer to Figure 4-Figure 6 One side of the first partition 2002, one side of the second partition 2003 and the inner wall of the reinforcement frame 2001 form a cavity 2006. The cavity 2006 set in the middle of the reinforcement frame 2001 prevents the external force from being concentrated on a certain point, but is dispersed throughout the entire reinforcement tube structure, thereby effectively reducing local stress concentration and improving the compressive resistance of the structure.

[0055] Working principle: Since the reinforcing component 2 is arranged in the middle of the PVC pipe, it includes a plurality of reinforcing frames 2001 with regular hexagonal cross sections bent into a reinforcing pipe. When the hexagonal structure is subjected to external force, the force can be evenly dispersed to each side and adjacent hexagons, similar to the effect of a spring, thereby achieving a good unloading effect and reducing the damage to the PVC pipe when it is subjected to the extrusion force. At the same time, the reinforcing frame 2001 with a hexagonal structure can provide the largest area under the condition of a fixed circumference, so that the reinforcing frame 2001 can provide a larger support area, thereby improving the overall strength of the structure. The cavity 2006 arranged in the middle of the reinforcing frame 2001 prevents the external force from being concentrated on a certain point, but is dispersed to the entire reinforcing pipe structure, thereby effectively reducing the local stress concentration and improving the compressive resistance of the structure, thereby achieving the main role of the reinforcing component 2 in the middle of the PVC pipe. The important supporting and reinforcing effect ensures the pressure resistance of the entire PVC pipe and meets people's usage needs. Secondly, when the inner pipe component 3 located in the middle of the PVC pipe is subjected to external pressure, the annular convex part 3001 in the inner pipe body will first bear the pressure. At the same time, each annular convex part 3001 (equivalent to the bamboo node in the bamboo) is equivalent to a transverse torsion box, which can resist the torque in the horizontal direction. At the same time, it greatly improves the transverse anti-extrusion and anti-shearing ability of the inner pipe body, so that the inner pipe body has good pressure-bearing capacity, and has a good auxiliary pressure-bearing effect on the reinforcing component 2, further improving the pressure resistance of the entire PVC pipe. The force on the relatively fragile middle section 3002 of the entire inner pipe body is much smaller than the annular convex parts 3001 at both ends. At the same time, the arc tube 3003 provided can also play a good supporting and reinforcing role for the middle section 3002 of the pipe body, reducing the probability of damage to the middle section 3002 of the pipe body.

[0056] Example 2

[0057] Reference Figure 7-Figure 8, a pressure-resistant PVC pipe. Compared with Example 1, this embodiment also includes that the outer walls of one side of the first partition 2002 and the second partition 2003 are fixedly connected with reinforcing plates 2007 distributed in a circle at equal distances, and the middle parts of the outer walls of the first partition 2002 and the second partition 2003 are fixedly connected with a central support tube 2009, and the cross-section of the central support tube 2009 is a regular hexagon. By arranging the reinforcing plates 2007 and the central support tube 2009 on the outer walls of the partitions on both sides of the reinforcing frame 2001, the strength of the reinforcing frame 2001 can be further improved, and the strength and pressure resistance of the reinforcing tube formed by bending the reinforcing frame 2001 can be further improved.

[0058] In order to make the reinforcement component 2 tightly connected with the outer tube 1 and the inner tube component 3, refer to Figure 7-Figure 8 A first through hole 2008 is provided on the outer wall of one side of the reinforcing plate 2007, and the first through holes 2008 are equidistantly distributed on the outer wall of one side of the reinforcing plate 2007. Second through holes 2010 are provided on the outer walls of the six sides of the central support tube 2009. During the injection molding process of the inner tube component 3, the injection molding material can flow through the first through hole 2008 and the second through hole 2010. After the injection molding material is cooled and formed, the inner tube component 3 can be fixed with the reinforcing plate 2007 and the central support tube 2009 in an interlaced manner, thereby ensuring the stability of the connection between the inner tube component 3 and the reinforcing component 2.

[0059] In order to further improve the tightness of the connection between the inner tube assembly 3 and the reinforcement frame 2001, refer to Figure 7-Figure 8 , an annular groove 2011 is provided on one side outer wall of the first partition 2002 and the second partition 2003, and the annular groove 2011 is diffusely distributed in an equidistant circular pattern on one side outer wall of the first partition 2002 and the second partition 2003. After the injection molding material flowing into the annular groove 2011 is cooled, the first injection molding layer 3005 and the second injection molding layer 4 can be embedded in the first partition 2002 and the second partition 2003 on both sides of the reinforcement frame 2001, thereby ensuring the connection strength between the inner tube assembly 3, the outer tube 1 and the reinforcement frame 2001.

[0060] Example 3

[0061] Reference Figure 9-10, a pressure-resistant PVC pipe, compared with embodiments 1-2, this embodiment also includes a buffer tube 5 arranged outside the outer tube 1, the circumferential inner wall of the buffer tube 5 is fixedly connected with buffer plates 7 that are equidistantly distributed in a circle, the buffer plate 7 includes an end 7001 and a head 7002, the end 7001 is fixedly connected to the circumferential inner wall of the buffer tube 5, the cross section of the head 7002 is teardrop-shaped, the circumferential outer wall of the outer tube 1 is fixedly connected with a buffer seat 8 that is equidistantly distributed in a circle, the buffer seat 8 includes a convex block portion 8002 and a groove portion 8001, a group of groove portions 8001 is located in the middle of the two groups of convex block portions 8002, and the head 7002 is plugged into the groove portion 8001 Inside the groove 8001, the spacing between the two side edges gradually decreases in the direction away from the head 7002. When the PVC pipe is subjected to pressure, the buffer tube 5 will absorb it first. At this time, the head 7002 of the buffer plate 7 on the circumferential inner wall of the buffer tube 5 will go deeper into the groove 8001 of the buffer seat 8. The friction force of the head 7002 inserted into the groove 8001 can absorb and convert the pressure. At the same time, since the spacing between the two side edges of the groove 8001 gradually decreases in the direction away from the head 7002, the friction resistance of the head 7002 inserted into the groove 8001 becomes larger and larger, thereby ensuring the pressure resistance of the entire buffer tube 5.

[0062] In order to improve the pressure resistance of the outer tube 1, refer to Figure 9-10 The circumferential inner wall of the buffer tube 5, the outer wall of one side of the buffer plate 7, and the outer side of the buffer seat 8 together surround a filling groove, and a filling layer 6 is arranged inside the filling groove. The filling layer 6 is distributed in an equidistant circle inside the buffer tube 5. The filling layer 6 is an elastic material, so that the buffer tube 5 has a good shock-absorbing and buffering effect and a certain rebound ability.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure-resistant PVC pipe, comprising an outer pipe (1), a reinforcement component (2) and an inner pipe component (3), characterized in that: The circumferential inner wall of the outer tube (1) is fixedly connected to the reinforcing assembly (2), the circumferential inner wall of the reinforcing assembly (2) is fixedly connected to the inner tube assembly (3), the reinforcing assembly (2) is arranged outside the inner tube assembly (3), and the outer tube (1) is arranged outside the reinforcing assembly (2); The inner tube assembly (3) comprises a straight tube (3004), the circumferential outer wall of the straight tube (3004) is provided with a first injection-molded layer (3005), the circumferential inner wall of the straight tube (3004) is provided with arc-shaped tubes (3003), the arc-shaped tubes (3003) are distributed at equal distances inside the straight tube (3004), the straight tube (3004), the first injection-molded layer (3005), and the arc-shaped tubes (3003) are all integrally formed by injection molding, and the straight tube (3004) is fixedly connected to the reinforcing assembly (2) via the first injection-molded layer (3005); An inner tube body is arranged inside the straight tube (3004), and the inner tube body comprises an annular convex portion (3001) and a tube body middle section (3002) which are equidistantly distributed inside the straight tube (3004), and the tube body middle section (3002) is arranged in the middle of two groups of the annular convex portions (3001), and the annular convex portion (3001) is fixedly connected to the circumferential inner wall of the straight tube (3004), and the side of the arc tube (3003) away from the straight tube (3004) is fixedly connected to the circumferential outer wall of the tube body middle section (3002), and the cross section of the inner tube body is bamboo-joint-shaped.

2. A pressure-resistant PVC pipe according to claim 1, characterized in that: The reinforcement component (2) comprises a reinforcement frame (2001), the cross section of the reinforcement frame (2001) is a regular hexagon, and a plurality of groups of the reinforcement frames (2001) are surrounded by a reinforcement tube, which is arranged outside the inner tube component (3).

3. A pressure-resistant PVC pipe according to claim 2, characterized in that: The inner wall of the reinforcement frame (2001) is respectively fixedly connected with a first partition plate (2002) and a second partition plate (2003); the first partition plate (2002) and the reinforcement frame (2001) form a first injection molding groove (2004); the second partition plate (2003) and the reinforcement frame (2001) form a second injection molding groove (2005); and the first injection molding layer (3005) is filled in the interior of the first injection molding groove (2004).

4. A pressure-resistant PVC pipe according to claim 3, characterized in that: The interior of the second injection molding groove (2005) is filled with a second injection molding layer (4), and the outer tube (1) is fixedly connected to the reinforcement component (2) via the second injection molding layer (4).

5. A pressure-resistant PVC pipe according to claim 4, characterized in that: One side of the first partition plate (2002), one side of the second partition plate (2003) and the inner wall of the reinforcement frame (2001) form a cavity (2006).

6. A pressure-resistant PVC pipe according to claim 5, characterized in that: The outer walls of one side of the first partition (2002) and the second partition (2003) are fixedly connected with reinforcing plates (2007) that are equidistantly distributed in a circular shape, and the middle parts of the outer walls of the first partition (2002) and the second partition (2003) are fixedly connected with a central support tube (2009), and the cross-section of the central support tube (2009) is a regular hexagon.

7. A pressure-resistant PVC pipe according to claim 6, characterized in that: A first through hole (2008) is provided on an outer wall of one side of the reinforcing plate (2007), and the first through holes (2008) are distributed at equal distances on the outer wall of one side of the reinforcing plate (2007), and second through holes (2010) are provided on the six outer walls of the central support tube (2009).

8. A pressure-resistant PVC pipe according to claim 7, characterized in that: An annular groove (2011) is provided on one side outer wall of the first partition plate (2002) and the second partition plate (2003), and the annular groove (2011) is distributed in an equidistant circular pattern on one side outer wall of the first partition plate (2002) and the second partition plate (2003).

9. A pressure-resistant PVC pipe according to claim 8, characterized in that: A buffer tube (5) is arranged outside the outer tube (1). The circumferential inner wall of the buffer tube (5) is fixedly connected with buffer plates (7) which are equidistantly distributed in a circular shape. The buffer plate (7) comprises an end (7001) and a head (7002). The end (7001) is fixedly connected to the circumferential inner wall of the buffer tube (5). The cross section of the head (7002) is in the shape of a water drop. The circumferential outer wall of the outer tube (1) is fixedly connected with a buffer seat (8) which is equidistantly distributed in a circular shape. The buffer seat (8) comprises a convex block portion (8002) and a concave groove portion (8001). One group of the concave groove portions (8001) is located in the middle of two groups of the convex block portions (8002). The head (7002) is inserted into the interior of the concave groove portion (8001). The spacing between the two side edges of the concave groove portion (8001) gradually decreases in a direction away from the head (7002).

10. A pressure-resistant PVC pipe according to claim 9, characterized in that: The circumferential inner wall of the buffer tube (5), the outer wall of one side of the buffer plate (7), and the outer side of one side of the buffer seat (8) together surround a filling groove, and a filling layer (6) is arranged inside the filling groove. The filling layer (6) is distributed in an equidistant circular pattern inside the buffer tube (5).

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