A tensile connecting device for PE gas pipes

Abstract

The application discloses a kind of PE gas pipeline's tensile connecting device, including for connecting left gas pipeline, right gas pipeline tensile connecting device, the tensile connecting device includes left fixed block, right fixed block, left fixed block is embedded in left gas pipeline and is integrally formed with left gas pipeline, right fixed block is embedded in right gas pipeline and is integrally formed with right gas pipeline, left fixed block is provided with assembly hole through left fixed block along its length direction, right fixed block is embedded with the corresponding connecting sleeve of stainless steel material in right fixed block, assembly hole allows connecting sleeve to pass, one end of connecting sleeve is located outside right gas pipeline, the other end is flush with the end face of right fixed block in right gas pipeline, connecting sleeve right end is integrally formed with limiting ring, spiral groove is provided on the outer wall of connecting sleeve along its length direction.The application is used to increase the contact area when two gas pipelines are connected, and the connection is not prone to misalignment, the compression resistance of the connection is relatively uniform, the tensile strength is also strong, and it is not prone to falling off.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more specifically to a tensile connection device for PE gas pipelines. Background Technology

[0002] PE gas pipelines are currently the most widely used gas transmission pipelines, characterized by good corrosion resistance and long service life. When connecting PE gas pipelines, the ends of the two gas pipelines are generally connected by high-temperature melting using a hot melt machine. This connection method is simple and practical. However, due to the limitation of the gas pipeline wall thickness, the contact area of ​​the two connecting ends is only a ring around the pipe wall thickness. The contact area is small, and misalignment is easy to occur during connection, resulting in uneven connection. This leads to uneven compressive strength at the connection point, increasing the risk of cracking and gas leakage. At the same time, the tensile strength of the two gas pipelines is also relatively weak after connection. Summary of the Invention

[0003] The purpose of this invention is to provide a tensile connection device for PE gas pipelines, which increases the contact area when two gas pipelines are connected, making it less prone to misalignment during connection, with more uniform compressive strength at the connection point, stronger tensile strength, and less likely to fall off.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0005] A tensile connection device for PE gas pipelines includes a tensile connection device for connecting a left gas pipeline and a right gas pipeline. The tensile connection device includes a left fixing block and a right fixing block. The left fixing block is embedded in the left gas pipeline and integrally formed with the left gas pipeline. The right fixing block is embedded in the right gas pipeline and integrally formed with the right gas pipeline. The left fixing block has an assembly hole that penetrates the left fixing block along its length direction. The right fixing block has a connecting sleeve made of stainless steel corresponding to the assembly hole embedded inside it. The assembly hole allows the connecting sleeve to pass through. One end of the connecting sleeve is located outside the right gas pipeline, and the other end is flush with the end face of the right fixing block located inside the right gas pipeline. The right end of the connecting sleeve is integrally formed with a limiting ring. The outer wall of the connecting sleeve has a spiral groove along its length direction.

[0006] By adopting the above technical solution, the two gas pipelines to be connected are divided into a left gas pipeline and a right gas pipeline. A left fixing block is integrally formed inside the left gas pipeline, and a right fixing block is integrally formed inside the right gas pipeline. Both fixing blocks are cylindrical structures made of the same PE material as the gas pipelines. The left fixing block has a horizontally penetrating assembly hole. Except for the assembly hole, the rest of the left fixing block is solid. The right fixing block has a fixed connecting sleeve made of stainless steel. The connecting sleeve is fixedly connected to the right fixing block and can be connected by vulcanization. The left end of the connecting sleeve extends to the outside of the right gas pipeline, and this part can pass through the assembly hole. The right end of the connecting sleeve has an integrally formed limit ring, which can restrict the connecting sleeve from moving to the left and prevent the connecting sleeve from falling off the right fixing block. A spiral groove is provided on the surface of the connecting sleeve located on the outside of the right gas pipeline. During assembly, the two gas pipelines are first placed on a hot melt machine, and the connecting sleeve on the right fixing block is inserted into the assembly hole, aligning the opposite ends of the two gas pipelines. The connection is then completed by hot melting. The heating process melts the PE material at the ends of the two gas pipelines, causing the end faces of the two gas pipelines to fuse together, forming a one-piece structure that connects the two gas pipelines. Simultaneously, during the melting process, the molten PE material on the left fixing block penetrates into the spiral groove. After the temperature drops, a threaded connection is formed between the left fixing block and the connecting sleeve. This improves the lateral tensile strength of the connected gas pipelines, making the connection less prone to breakage or detachment. Furthermore, compared to existing gas pipeline connections where the contact area is limited to the circumference of the pipe wall thickness, this solution utilizes multiple contact areas: firstly, the end face area between the two fixing blocks; secondly, the contact area between the connecting sleeve and the assembly hole. This significantly increases the contact area during connection, enhancing the connection's strength. Moreover, the connecting sleeve also has a positioning function, preventing misalignment during the connection. The circumferential compressive strength of the entire connection point is more uniform, reducing the risk of cracking and improving the safety of the gas pipeline operation.

[0007] Furthermore, the assembly holes are provided in three shapes, which are distributed in a triangular shape inside the left fixing block.

[0008] Furthermore, the length of the connecting sleeve located on the outside of the right gas pipeline is greater than the length of the assembly hole.

[0009] Furthermore, the outer end of the connecting sleeve is provided with an arc-shaped bent edge, the circumference of which is adapted to the size of the assembly hole, and the diameter of the connecting sleeve on the side of the bent edge is smaller than the diameter of the assembly hole.

[0010] Furthermore, the spiral groove on the outer wall of the connecting sleeve is filled with a filler layer of the same material as the gas pipeline.

[0011] Furthermore, the filler layer is not higher than the height of the bent edge.

[0012] Furthermore, after the connecting sleeve is assembled into the assembly hole, the right side of the bent edge contacts the right end face of the left fixing block.

[0013] Furthermore, a stainless steel gasket fitted onto the connecting sleeve is provided between the left gas pipe and the right gas pipe.

[0014] Furthermore, the stainless steel gasket has a through hole on its side that allows the connecting sleeve to pass through, and PE material compensation gaskets are provided on both sides of the stainless steel gasket.

[0015] Furthermore, the portion of the connecting sleeve surface that contacts the right fixing block is a rough surface.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. In this invention, the two gas pipes to be connected are divided into a left gas pipe and a right gas pipe. A left fixing block is integrally formed inside the left gas pipe, and a right fixing block is integrally formed inside the right gas pipe. Both fixing blocks are cylindrical structures made of the same PE material as the gas pipes. The left fixing block has a horizontally penetrating assembly hole. The area inside the left fixing block, except for the assembly hole, is solid. The right fixing block has a connecting sleeve made of stainless steel fixed inside. The connecting sleeve is fixedly connected to the right fixing block and can be connected by vulcanization. The left end of the connecting sleeve extends to the outside of the right gas pipe, and this part can pass through the assembly hole. The right end of the connecting sleeve is integrally formed with a limit ring, which can restrict the connecting sleeve from moving to the left and prevent the connecting sleeve from falling off the right fixing block. A spiral groove is provided on the surface of the connecting sleeve located on the outside of the right gas pipe. During assembly, the two gas pipes are first placed on a hot melt machine, and the connecting sleeve on the right fixing block is inserted into the assembly hole, aligning the opposite ends of the two gas pipes. The hot melt machine is then used to heat the connection. Heat melts the PE material at the ends of the two gas pipelines, causing the end faces of the two gas pipelines to fuse together, forming a one-piece structure that connects the two gas pipelines. Simultaneously, during the melting process, the molten PE material on the left fixing block penetrates into the spiral groove. After the temperature drops, a threaded connection is formed between the left fixing block and the connecting sleeve. This improves the lateral tensile strength of the two gas pipelines after connection, making the connection less prone to breakage or detachment. Furthermore, compared to existing gas pipeline connections where the contact area is limited to the circumference of the pipe wall thickness, this solution utilizes multiple contact areas: first, the end face area between the two fixing blocks; second, the contact area between the connecting sleeve and the assembly hole. This significantly increases the contact area when connecting the two gas pipelines, improving connection strength. Moreover, the connecting sleeve also has a positioning function, preventing misalignment when the two gas pipelines are joined. The circumferential compressive strength of the entire connection point is more uniform, reducing the risk of cracking and improving the safety of gas pipeline use.

[0018] 2. There are three connecting sleeves and three assembly holes. After the three connecting sleeves are inserted into the three corresponding assembly holes, their torsional resistance in the circumferential direction is higher during the connection of the two gas pipelines and after the connection is completed, thus improving the firmness of the gas pipeline connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure after the two gas pipelines are assembled.

[0021] Figure 3 for Figure 1Schematic diagram of the structure of AA;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of BB;

[0023] Figure 5 This is a structural diagram of a stainless steel gasket;

[0024] Figure 6 This is a structural diagram of the connecting sleeve.

[0025] Attached reference numerals: 1-Left gas pipe, 2-Right gas pipe, 3-Left fixing block, 4-Right fixing block, 5-Connecting sleeve, 6-Assembly hole, 7-Bent edge, 8-Stainless steel gasket, 9-Compensation gasket, 10-Limiting ring, 11-Filling layer, 12-Spiral groove, 13-Installation through hole. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example 1

[0030] A tensile connection device for PE gas pipelines includes a tensile connection device for connecting a left gas pipeline 1 and a right gas pipeline 2. The tensile connection device includes a left fixing block 3 and a right fixing block 4. The left fixing block 3 is embedded in the left gas pipeline 1 and is integrally formed with the left gas pipeline 1. The right fixing block 4 is embedded in the right gas pipeline 2 and is integrally formed with the right gas pipeline 2. The left fixing block 3 has an assembly hole 6 that penetrates the left fixing block 3 along its length direction. The right fixing block 4 has a connecting sleeve 5 made of stainless steel corresponding to the assembly hole 6 embedded inside it. The assembly hole 6 allows the connecting sleeve 5 to pass through. One end of the connecting sleeve 5 is located outside the right gas pipeline 2, and the other end is flush with the end face of the right fixing block 4 located inside the right gas pipeline 2. The right end of the connecting sleeve 5 is integrally formed with a limiting ring 10. The outer wall of the connecting sleeve 5 has a spiral groove 12 along its length direction.

[0031] In this embodiment, as Figure 1 As shown, the two gas pipes to be connected are divided into a left gas pipe 1 and a right gas pipe 2. A left fixing block 3 is integrally formed inside the left gas pipe 1, and a right fixing block 4 is integrally formed inside the right gas pipe 2. Both fixing blocks are cylindrical structures made of the same PE material as the gas pipes. The left fixing block 3 has a horizontally penetrating mounting hole 6. Except for the mounting hole 6, the rest of the left fixing block 3 is solid. A connecting sleeve 5 made of stainless steel is fixed inside the right fixing block 4. The connecting sleeve 5 has open ends for transporting gas from the right gas pipe 2 to the left gas pipe 1. The connecting sleeve 5 and the right fixing block 4 are fixedly connected, which can be achieved through vulcanization. The left end of the connecting sleeve 5 extends to the outside of the right gas pipe 2, and this part can pass through the mounting hole 6. A limit ring 10 is integrally formed on the right end of the connecting sleeve 5 to restrict the leftward movement of the connecting sleeve 5 and prevent the connecting sleeve 5 from detaching from the right fixing block 4. Figure 6 As shown, a spiral groove 12 is provided on the surface of the connecting sleeve 5 located on the outside of the right gas pipe 2. During assembly, the two gas pipes are first placed on a hot melt machine, and the connecting sleeve 5 on the right fixing block 4 is inserted into the assembly hole 6, aligning the opposite ends of the two gas pipes. The PE material at the ends of the two gas pipes is melted by heating with the hot melt machine, thereby fusing the end faces of the two gas pipes together to form an integral structure, connecting the two gas pipes into one. At the same time, during the melting process, the molten PE material on the left fixing block 3 penetrates into the spiral groove 12. After the temperature drops, a threaded connection is formed between the left fixing block 3 and the connecting sleeve 5. Figure 2As shown, the lateral tensile strength is improved after the two gas pipelines are connected in this way, resulting in better tensile strength. This makes the connection between the two gas pipelines less prone to breakage or detachment. Moreover, compared to the existing gas pipeline connection where the contact area is only the circumferential surface of the pipe wall thickness, which is relatively small, the contact area in this solution is multifaceted. First, there is the end face area between the two fixing blocks; second, there is the contact area between the connecting sleeve 5 and the assembly hole 6. This greatly increases the contact area when the two gas pipelines are connected, improving the connection firmness. Furthermore, the connecting sleeve 5 also has a positioning function, making it less likely for the two gas pipelines to misalign when they are joined. The compressive strength is more uniform in all circumferential directions at the entire connection position, making it less prone to cracking and improving the safety of gas pipeline use.

[0032] Example 2

[0033] Furthermore, the assembly hole 6 is provided in three parts, and the three assembly holes 6 are distributed in a triangular shape inside the left fixing block 3.

[0034] Specifically, as shown in the figure, based on Example 1, such as... Figure 4 As shown, there are three connecting sleeves 5 arranged in an equilateral triangle. There are also three assembly holes 6. After the three connecting sleeves 5 are inserted into the three corresponding assembly holes 6, their torsional resistance in the circumferential direction is higher during the connection of the two gas pipelines and after the connection is completed, thus improving the firmness of the gas pipeline connection.

[0035] Example 3

[0036] Furthermore, the length of the connecting sleeve 5 located outside the right gas pipeline 2 is greater than the length of the assembly hole 6. Specifically, this ensures that after the connecting sleeve 5 is inserted into the assembly hole 6, its left end will extend beyond the left end of the assembly hole 6. This prevents material from flowing into the connecting sleeve 5 during the melting process and causing blockage of the flow channel, which would affect the subsequent gas delivery.

[0037] Furthermore, the outer end of the connecting sleeve 5 is provided with an arc-shaped bent edge 7. The circumferential dimension of the bent edge 7 is adapted to the size of the mounting hole 6, and the diameter of the connecting sleeve 5 on the side of the bent edge 7 is smaller than the diameter of the mounting hole 6. Specifically, as shown... Figure 3 and 6 As shown, an arc-shaped bent edge 7 is provided at the left end of the connecting sleeve 5. Specifically, it can be a semi-circular bent edge 7. After the bent edge 7 is formed, it is also a ring. However, the diameter of the ring is just matched with the size of the assembly hole 6, so that the connecting sleeve 5 can pass through the assembly hole 6. At the same time, the arc-shaped bent edge 7 can improve the smoothness of the connecting sleeve 5 passing through the assembly hole 6 and the smoothness of the gas entering the connecting sleeve, thus improving the efficiency when the two gas pipelines are connected. The main function of the bent edge 7 is to prevent molten material from flowing into the interior of the connecting sleeve 5, further preventing the internal flow channel of the connecting sleeve 5 from being blocked.

[0038] Furthermore, the spiral groove 12 on the outer wall of the connecting sleeve 5 is filled with a filler layer 11 of the same material as the gas pipeline. Specifically, since the size of the connecting sleeve 5 on the right side of the bent edge 7 is slightly smaller than the size of the assembly hole 6, after the two gas pipelines are joined, there will be a certain gap between the outer wall of the connecting sleeve 5 and the inner wall of the assembly hole 6. During hot-melt welding, molten PE material on the gas pipeline is needed to fill this gap, which may affect the quality of the gas pipeline. Therefore, a filler layer 11 of PE material is pre-filled in the spiral groove 12 so that when hot-melt welding is performed, the PE material in the spiral groove 12 can fill the gap after melting, avoiding affecting the quality of the gas pipeline later.

[0039] Furthermore, the height of the filler layer 11 is not higher than the height of the bent edge 7. In order to facilitate the smooth insertion of the connecting sleeve 5 into the assembly hole 6, the height of the filler layer 11 needs to be slightly lower than the circumference height formed by the bent edge 7, that is, the circumference diameter formed by the bent edge 7 is greater than the circumference diameter formed by the filler layer 11.

[0040] Furthermore, after the connecting sleeve 5 is assembled into the assembly hole 6, the right side of the bent edge 7 contacts the right end face of the left fixing block 3. Specifically, in order to further improve the tensile strength of the connection between the two gas pipelines, after the connecting sleeve 5 is assembled into the assembly hole 6, the bent edge 7 directly contacts the left end face of the left fixing block 3, which enhances the lateral tensile strength between the connecting sleeve 5 and the left fixing block 3, thereby enhancing the lateral tensile strength between the two gas pipelines.

[0041] Example 4

[0042] Furthermore, a stainless steel gasket 8 is provided between the left gas pipe and the right gas pipe 2, and is fitted onto the connecting sleeve 5.

[0043] Furthermore, such as Figure 5 As shown, the stainless steel gasket 8 has a through hole 13 on its side that allows the connecting sleeve 5 to pass through, and PE material compensation gaskets 9 are provided on both sides of the stainless steel gasket 8.

[0044] In this embodiment, as Figure 1As shown, there is a certain installation gap between the left gas pipeline 1 and the right gas pipeline 2 during hot-melt welding. To avoid using the materials on the gas pipeline and the fixing block to fill the installation gap, a stainless steel gasket 8 is provided between the two gas pipelines and fitted on the connecting sleeve 5. At the same time, a compensation gasket 9 is also provided on both sides of the stainless steel gasket 8. Alternatively, multiple compensation gaskets 9 and stainless steel gaskets 8 can be arranged alternately. The thickness of the stainless steel gasket 8 can be between 0.5-1mm. After the two gas pipelines are firmly connected, the stainless steel gasket 8 is completely integrated with the gas pipeline and the two fixing blocks, forming a reinforcing rib, which can improve the bending moment resistance of the connection.

[0045] Example 5

[0046] Furthermore, the surface of the connecting sleeve 5 that contacts the right fixing block 4 is a rough surface. Specifically, since the connecting sleeve 5 is made of stainless steel, which is different from the material of the right fixing block 4, the surface of the connecting sleeve 5 that contacts the right fixing block 4 is made rough in order to improve the connection between the connecting sleeve 5 and the right fixing block 4. This can increase the contact area, increase the friction, improve the connection strength, and prevent the connecting sleeve 5 from falling off the right fixing block 4.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A tensile connection device for PE gas pipes, comprising a tensile connection device for connecting a left gas pipe (1), a right gas pipe (2), characterized in that, The anti-tension connecting device comprises a left fixed block (3) and a right fixed block (4), the left fixed block (3) is embedded in the left gas pipeline (1) and is integrally formed with the left gas pipeline (1), the right fixed block (4) is embedded in the right gas pipeline (2) and is integrally formed with the right gas pipeline (2), an assembly hole (6) penetrating through the left fixed block (3) is arranged in the left fixed block (3) along the length direction of the left fixed block (3), a connecting sleeve (5) made of stainless steel and corresponding to the assembly hole (6) is embedded in the right fixed block (4), the connecting sleeve (5) penetrates through the assembly hole (6), one end of the connecting sleeve (5) is located outside the right gas pipeline (2), the other end is flush with the end face of the right fixed block (4) located in the right gas pipeline (2), a limiting ring (10) is integrally formed at the right end of the connecting sleeve (5), a spiral groove (12) is arranged on the outer wall of the connecting sleeve (5) along the length direction of the connecting sleeve (5), an arc-shaped bending edge (7) is arranged at the outer end of the connecting sleeve (5), the diameter of the circle formed by the bending edge (7) is matched with the size of the assembly hole (6), the diameter of the connecting sleeve (5) located at one side of the bending edge (7) is smaller than the diameter of the assembly hole (6), the spiral groove (12) on the outer wall of the connecting sleeve (5) is filled with a filler layer (11) made of the same material as the gas pipeline, during assembly, the two gas pipelines are placed on a hot melting machine, the connecting sleeve (5) on the right fixed block (3) is inserted into the assembly hole (6), the opposite end faces of the two gas pipelines are aligned, the PE material at the end ports of the two gas pipelines is melted by heating of the hot melting machine, and then the end faces of the two gas pipelines are fused with each other, so that an integrally formed structure is formed, and the two gas pipelines are connected as a whole, and in the melting process, the melted PE material on the left fixed block (3) penetrates into the spiral groove (12), and after the temperature decreases, the left fixed block (3) and the connecting sleeve (5) are connected in the form of screw thread.

2. A pull-tight connection device for PE gas pipes according to claim 1, characterized in that The assembly hole (6) is provided with three assembly holes (6) which are distributed in the left fixed block (3) in a triangular shape.

3. A pull-tight connection device for PE gas pipes according to claim 1, characterized in that, The length of the connecting sleeve (5) located outside the right gas pipeline (2) is greater than the length of the assembly hole (6).

4. A pull test coupling device for PE gas pipes according to claim 1, characterized in that, The height of the filler layer (11) is not higher than the height of the bending edge (7).

5. A pull test coupling device for PE gas pipes according to claim 1, characterized in that, After the connecting sleeve (5) is assembled into the assembly hole (6), the right side of the bending edge (7) is in contact with the left end face of the left fixed block (3).

6. A pull test coupling device for PE gas pipes according to claim 1, characterized in that, The left gas pipeline (1) and the right gas pipeline (2) are provided with a stainless steel gasket (8) sleeved on the connecting sleeve (5).

7. A pull test coupling device for PE gas pipes according to claim 6, characterized in that The side surface of the stainless steel gasket (8) is provided with a mounting through hole (13) allowing the connecting sleeve (5) to pass through, and the stainless steel gasket (8) is provided with a compensation gasket (9) made of PE material on both sides.

8. A pull-tight connection device for PE gas pipes according to claim 1, characterized in that, The part of the connecting sleeve (5) surface in contact with the right fixed block (4) is a rough surface.

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