A top-pull tube

Abstract

This invention discloses a jacking pipe, aiming to provide a jacking pipe that facilitates the assembly and connection between jacking pipes during actual construction and effectively improves the problem of local tooth root fracture that easily occurs during the assembly process. One end of the jacking pipe is a spigot end, and the other end is a socket end. The outer circumferential surface of the spigot end is provided with a first front connecting section, a first middle connecting section, and a first rear connecting section distributed sequentially along the axial direction of the jacking pipe. The first front connecting section includes at least one annular first front connecting tooth; the first middle connecting section includes several annular first middle connecting teeth distributed sequentially along the axial direction of the jacking pipe; and the first rear connecting section includes at least one annular first rear connecting tooth. The tooth width of the first rear connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth apex angle of the first rear connecting tooth is smaller than the tooth apex angle of the first middle connecting tooth; the tooth width of the first front connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth apex angle of the first front connecting tooth is smaller than the tooth apex angle of the first rear connecting tooth.

Description

Technical Field

[0001] This invention relates to the field of pipeline technology, and specifically to a top-pull pipe. Background Technology

[0002] Pipe jacking technology is an outstanding example of advancements in modern civil engineering technology. Originating from a reflection on traditional open-cut construction, it relies on precise guidance and control technologies to achieve precision, environmental friendliness, and high efficiency in underground pipeline laying.

[0003] The application scenarios of pipe jacking have expanded from general municipal pipe networks to special crossing projects in various complex geographical and human environments. It has become an indispensable key technology in modern urban construction, renewal and maintenance, and provides strong technical support for building intensive, intelligent and green modern urban underground spaces.

[0004] One end of the top-pull tube is a spigot end, and the other end is a socket end. The outer circumferential surface of the spigot end has several annular connecting teeth, and the inner end face of the socket end also has several annular connecting teeth. The connecting teeth on the spigot end can mate with the connecting teeth on the socket end. Currently, the connecting teeth on the spigot end of the top-pull tube are generally consistent, that is, the tooth width and tooth apex angle of each connecting tooth are consistent. This makes assembly difficult when the spigot end and socket end of the top-pull tube are inserted, and it is prone to local tooth root breakage; especially, the connecting teeth near the front end on the outer circumferential surface of the spigot end are more prone to tooth root breakage during assembly.

[0005] Furthermore, to facilitate the assembly of the top-pull pipe, a chamfer is generally set on the end face of the spigot and / or socket. Although this facilitates the connection between the spigot and socket ends of the top-pull pipe, there are still difficulties in assembly when the spigot and socket ends are engaged, and the root of the tooth is prone to breakage.

[0006] For example, Chinese Patent Publication No. CN 213839925 U, entitled "A Top Pull Tube," describes an invention with multiple first fasteners (equivalent to connecting teeth) on the outer wall of its insertion end and multiple second fasteners that mate with the first fasteners on the inner wall of its interface end. The first fasteners in this application have the same shape and size, and thus suffer from the same aforementioned problem. Summary of the Invention

[0007] The purpose of this invention is to provide a jacking pipe that makes the assembly and connection between jacking pipes more convenient in actual construction and effectively improves the problem of local tooth root fracture that easily occurs during the assembly of jacking pipes.

[0008] The technical solution of this invention is: A top-pull tube has a spigot end at one end and a socket end at the other end. The outer circumferential surface of the spigot end is provided with a first front connecting section, a first middle connecting section and a first rear connecting section distributed sequentially along the axial direction of the top-pull tube. The end face of the first front connecting section near the spigot end includes at least one annular first front connecting tooth. The first middle connecting section includes several annular first middle connecting teeth distributed sequentially along the axial direction of the top-pull tube. The first rear connecting section includes at least one annular first rear connecting tooth. The tooth width of the first rear connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth tip angle of the first rear connecting tooth is smaller than the tooth tip angle of the first middle connecting tooth. The tooth width of the first front connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth tip angle of the first front connecting tooth is smaller than the tooth tip angle of the first rear connecting tooth.

[0009] In actual construction, during the insertion of the spigot end of the jacking pipe into the socket end of another jacking pipe, the first front connecting tooth of the spigot end first abuts against the connecting tooth inside the socket end. Because the first front connecting tooth of the first front connecting section has a small tooth tip angle and a large tooth width, it is easy for the first front connecting tooth to squeeze past the connecting tooth inside the socket end, thus facilitating the insertion of the spigot end of the jacking pipe into the socket end of another jacking pipe. At the same time, because the tooth width of the first front connecting tooth is large, it can also effectively avoid the problem of tooth root breakage during the insertion of the first front connecting tooth.

[0010] Secondly, because the tooth tip angle of each of the first connecting teeth in the first connecting section is relatively large, after the spigot end of the top-pull tube is inserted into the socket end of another top-pull tube, it can ensure that the top-pull tube is tightly assembled and not easy to fall off. At the same time, because the connecting teeth in the socket end are first squeezed and deformed during the insertion of the first connecting teeth, even though the tooth tip angle of the first connecting teeth is relatively large and the tooth width is relatively small, it is still convenient to insert the first connecting teeth and effectively reduce the problem of tooth root breakage of the first connecting teeth.

[0011] Third, since the first rear connecting tooth in the first rear connecting section has a small tooth tip angle and a large tooth width, it is easier for the end of the pull tube to be fully inserted into the socket end of the other pull tube. This helps to ensure that the pull tube is assembled in place and effectively reduces the impact on the connection stability between the pull tubes due to improper assembly. At the same time, it can effectively reduce the risk of tooth root breakage of the first rear connecting tooth.

[0012] Preferably, the apex angle of each first intermediate connecting tooth gradually increases from the first front connecting section to the first rear connecting section. During the insertion of the spigot end of the pull-up tube into the socket end of another pull-up tube, the closer the first intermediate connecting tooth is to the first front connecting section, the more connecting teeth in the socket end it needs to squeeze through. Therefore, to further facilitate the assembly of the pull-up tube while ensuring a tight fit and preventing it from falling off, this design gradually increases the apex angle of each first intermediate connecting tooth from the first front connecting section to the first rear connecting section. That is, the apex angle of the first intermediate connecting tooth closer to the first front connecting section is smaller than that of the first intermediate connecting tooth closer to the first rear connecting section. This facilitates the insertion of the first intermediate connecting tooth closer to the first front connecting section, thus aiding in the assembly of the pull-up tube; and it also ensures a tight fit and prevents it from falling off, thanks to the first intermediate connecting tooth closer to the first rear connecting section.

[0013] Preferably, the tooth height of the first front connecting tooth is smaller than that of the first middle connecting tooth. This facilitates the first front connecting tooth to squeeze past the connecting tooth inside the socket end, making it easier to insert the first front connecting tooth and thus facilitating the assembly of the top-pull tube. At the same time, since the connecting tooth inside the socket end undergoes a compression deformation during the insertion of the first front connecting tooth, even though the tooth height of the first middle connecting tooth is greater than that of the first front connecting tooth, it is still easy to insert the first middle connecting tooth and effectively reduces the problem of tooth root breakage of the first middle connecting tooth.

[0014] Preferably, the tip angle of the first connecting tooth is 25-35 degrees. Although increasing the tip angle of the first connecting tooth improves the tightness of the pull tube assembly, it also increases the difficulty of assembling the pull tube and the risk of breakage of the first connecting tooth. Therefore, this solution sets the tip angle of the first connecting tooth to 25-35 degrees, which on the one hand ensures that the pull tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the pull tube.

[0015] Preferably, the tip angle of the first front connecting tooth is 5-10 degrees, and the tooth width of the first front connecting tooth is 1.5-3 times the tooth width of the first middle connecting tooth. Although reducing the tip angle of the first front connecting tooth is beneficial for its insertion, if the tip angle is too small, it will not be conducive to the tight fit between the first front connecting tooth and the connecting tooth in the socket end. Furthermore, during the insertion of the first front connecting tooth, the compression deformation effect on the connecting tooth in the socket end will be weaker, which will hinder the subsequent insertion of the first middle connecting tooth. Therefore, this solution sets the tip angle of the first front connecting tooth to 5-10 degrees, and the tooth width of the first front connecting tooth to 1.5-3 times the tooth width of the first middle connecting tooth. This facilitates the insertion of the first front connecting tooth, and during the insertion process, the connecting tooth in the socket end undergoes a compression deformation first, which facilitates the insertion of the first middle connecting tooth and effectively reduces the problem of tooth root breakage in the first middle connecting tooth.

[0016] Preferably, the tip angle of the first rear connecting tooth is 10-20 degrees, and the tooth width of the first rear connecting tooth is 1.5-3 times the tooth width of the first middle connecting tooth. Although reducing the tip angle of the first rear connecting tooth is beneficial for the end of the pull tube to be fully inserted into the socket end of the other pull tube, if the tip angle of the first rear connecting tooth is too small, it will be detrimental to the connection stability between the pull tubes. Therefore, this solution sets the tip angle of the first rear connecting tooth to 10-20 degrees, which on the one hand is beneficial for the end of the pull tube to be fully inserted into the socket end of the other pull tube, and on the other hand is beneficial for improving the connection stability between the pull tubes.

[0017] Preferably, the inner circumferential surface of the socket end is provided with a second front connecting section, a second middle connecting section and a second rear connecting section distributed sequentially along the axial direction of the pull tube, with the second front connecting section being close to the inner end of the socket end; The second front connecting section includes at least one second front connecting tooth that can mate with the first front connecting tooth; The second intermediate connecting section includes several second intermediate connecting teeth that can mate with the first intermediate connecting teeth, and each second intermediate connecting tooth is distributed sequentially along the axial direction of the jacking tube. The second rear connecting section includes at least one second rear connecting tooth that can mate with the first rear connecting tooth; The tooth width of the second rear connecting tooth is greater than the tooth width of the second middle connecting tooth, and the tooth tip angle of the second rear connecting tooth is smaller than the tooth tip angle of the second middle connecting tooth; The width of the second front connecting tooth is greater than the width of the second middle connecting tooth, and the apex angle of the second front connecting tooth is smaller than the apex angle of the second rear connecting tooth. In actual construction, during the insertion of the spigot end of the jacking pipe into the socket end of another jacking pipe, the first front connecting tooth of the spigot end first abuts against the second rear connecting tooth of the second rear connecting section inside the socket end. Since the apex angle of the second rear connecting tooth is smaller and the tooth width is larger, it is easier for each connecting tooth of the spigot end (including the first front connecting tooth, the first middle connecting tooth, and the first rear connecting tooth) to be inserted sequentially, thereby facilitating the insertion of the spigot end of the jacking pipe into the socket end of another jacking pipe.

[0018] Secondly, because the tooth apex angle of each of the second connecting teeth in the second connecting section is relatively large, after the spigot end of the top pulling pipe is inserted into the socket end of another top pulling pipe, it can ensure that the top pulling pipe is assembled firmly and is not easy to fall off.

[0019] Third, since the tooth tip angle of the second front connecting tooth in the second front connecting section is small and the tooth width is large, it is easier for the end of the top pull tube to be fully inserted into the socket end of the other top pull tube. This helps to ensure that the top pull tube is assembled in place and effectively reduces the impact of improper assembly of the top pull tube on the connection stability between the top pull tubes.

[0020] Preferably, the tooth tip angle of each second connecting tooth gradually increases from the second front connecting segment to the second rear connecting segment.

[0021] Preferably, the tip angle of the second connecting tooth is 25-35 degrees. Although increasing the tip angle of the second connecting tooth improves the tightness of the pull tube assembly, it also increases the difficulty of assembling the pull tube and the risk of breakage of the second connecting tooth. Therefore, this solution sets the tip angle of the second connecting tooth to 25-35 degrees, which on the one hand ensures that the pull tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the pull tube.

[0022] Preferably, the tip angle of the second front connecting tooth is 5-10 degrees, and the tooth width of the second front connecting tooth is 1.5-3 times the tooth width of the second middle connecting tooth. Although reducing the tip angle of the second front connecting tooth is beneficial for the proper assembly of the jacking tube, if the tip angle of the second front connecting tooth is too small, it will be detrimental to the connection stability between the jacking tubes. Therefore, this solution sets the tip angle of the second front connecting tooth to 5-10 degrees, and the tooth width of the first front connecting tooth is 1.5-3 times the tooth width of the first middle connecting tooth. This is beneficial for both the proper assembly of the jacking tube and the connection stability between the jacking tubes.

[0023] Preferably, the tip angle of the second rear connecting tooth is 10-20 degrees, and the tooth width of the second rear connecting tooth is 1.5-3 times the tooth width of the second middle connecting tooth. Although reducing the tip angle of the second rear connecting tooth is beneficial for the sequential insertion of each connecting tooth (including the first front connecting tooth, the first middle connecting tooth, and the first rear connecting tooth) at the insertion end, if the tip angle of the second rear connecting tooth is too small, it will be detrimental to the connection stability between the jacking tubes. Therefore, this solution sets the tip angle of the first rear connecting tooth to 10-20 degrees, which on the one hand is beneficial for the sequential insertion of each connecting tooth (including the first front connecting tooth, the first middle connecting tooth, and the first rear connecting tooth) at the insertion end, and on the other hand, is beneficial for improving the connection stability between the jacking tubes.

[0024] Preferably, a sealing ring is also included. A sealing ring groove is provided on the outer circumferential surface of the spigot end. The first front connecting section, the first middle connecting section, the first rear connecting section, and the sealing ring groove are sequentially distributed along the axial direction of the pull-out pipe. The sealing ring is disposed within the sealing ring groove. Thus, after the spigot end of the pull-out pipe is fully inserted into the socket end of another pull-out pipe, a sealing structure can be formed between the spigot end and the socket end by the sealing ring. Furthermore, the sealing structure is located near the port of the socket end, thereby ensuring the sealing performance of the pull-out pipe connection.

[0025] The beneficial effects of this invention are: Because the first front connecting tooth has a small apex angle and a large tooth width, it is easy to insert the end of the pull tube into the socket end of another pull tube; at the same time, because the first front connecting tooth has a large tooth width, it can also effectively avoid the problem of tooth root breakage during the insertion of the first front connecting tooth.

[0026] Because the tooth tip angle of each of the first connecting teeth is relatively large, after the spigot end of the top pull tube is inserted into the socket end of another top pull tube, it can ensure that the top pull tube is assembled firmly and is not easy to fall off.

[0027] Because the first rear connecting tooth has a small tip angle and a large tooth width, it helps to ensure that the top-pull tube is assembled in place; at the same time, it can effectively reduce the risk of tooth root breakage of the first rear connecting tooth. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of a top-pull tube according to the present invention.

[0029] Figure 2 This is a cross-sectional structural diagram of a top-pull tube according to the present invention.

[0030] Figure 3 yes Figure 2 A magnified view of a portion of point A in the image.

[0031] In the picture: Socket end 1, first front connecting section 1.1, first front connecting tooth 1.11, first middle connecting section 1.2, first middle connecting tooth 1.21, first rear connecting section 1.3, first rear connecting tooth 1.31, sealing ring 1.4, chamfer 1.5; Socket end 2. Detailed Implementation

[0032] This invention discloses a jacking pipe, aiming to provide a jacking pipe that facilitates the assembly and connection between jacking pipes during actual construction and effectively improves the problem of local tooth root fracture that easily occurs during the assembly process. One end of the jacking pipe is a spigot end, and the other end is a socket end. The outer circumferential surface of the spigot end is provided with a first front connecting section, a first middle connecting section, and a first rear connecting section distributed sequentially along the axial direction of the jacking pipe. The first front connecting section includes at least one annular first front connecting tooth; the first middle connecting section includes several annular first middle connecting teeth distributed sequentially along the axial direction of the jacking pipe; and the first rear connecting section includes at least one annular first rear connecting tooth. The tooth width of the first rear connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth apex angle of the first rear connecting tooth is smaller than the tooth apex angle of the first middle connecting tooth; the tooth width of the first front connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth apex angle of the first front connecting tooth is smaller than the tooth apex angle of the first rear connecting tooth.

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, a top-pull tube has a spigot end 1 at one end and a socket end 2 at the other end.

[0034] The outer circumferential surface of the socket end 1 is provided with a first front connecting section 1.1, a first middle connecting section 1.2 and a first rear connecting section 1.3 distributed sequentially along the axial direction of the top pull tube. The first front connecting section 1.1 is close to the end face of the socket end 1.

[0035] The first front connecting segment 1.1 includes at least one annular first front connecting tooth 1.11. In this embodiment, the first front connecting segment 1.1 is composed of one annular first front connecting tooth 1.11.

[0036] The first intermediate connecting section 1.2 includes several annular first intermediate connecting teeth 1.21 distributed sequentially along the axial direction of the jacking pipe.

[0037] The first rear connecting segment 1.3 includes at least one annular first rear connecting tooth 1.31. In this embodiment, the first rear connecting segment 1.3 is composed of one annular first rear connecting tooth 1.31.

[0038] The tooth width of the first rear connecting tooth 1.31 is greater than the tooth width of the first middle connecting tooth 1.21, and the tooth tip angle α of the first rear connecting tooth 1.31 is less than the tooth tip angle α of the first middle connecting tooth 1.21.

[0039] The tooth width of the first front connecting tooth 1.11 is greater than the tooth width of the first middle connecting tooth 1.21, and the tooth tip angle α of the first front connecting tooth 1.11 is less than the tooth tip angle α of the first rear connecting tooth 1.31.

[0040] In the actual construction of this embodiment, during the process of inserting the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe, the first front connecting tooth 1.11 of the spigot end 1 first abuts against the connecting tooth inside the socket end 2. Since the tooth tip angle of the first front connecting tooth 1.11 of the first front connecting section 1.1 is small and the tooth width is large, it is convenient for the first front connecting tooth 1.11 to squeeze past the connecting tooth inside the socket end 2, thereby facilitating the insertion of the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe. At the same time, since the tooth width of the first front connecting tooth 1.11 is large, it can also effectively avoid the problem of tooth root breakage during the insertion of the first front connecting tooth 1.11.

[0041] Secondly, because the tooth apex angle of each of the first connecting teeth 1.21 in the first connecting section 1.2 is relatively large, after the insertion end 1 of the top-pull tube is inserted into the socket end 2 of another top-pull tube, it can ensure that the top-pull tube is tightly assembled and not easily detached. At the same time, because the connecting teeth in the socket end 2 are first squeezed and deformed during the insertion of the first front connecting tooth 1.11, even though the tooth apex angle of the first connecting tooth 1.21 is relatively large and the tooth width is relatively small, it is still convenient to insert the first connecting tooth 1.21 and effectively reduce the problem of tooth root breakage of the first connecting tooth 1.21.

[0042] Third, since the tooth tip angle of the first rear connecting tooth 1.31 in the first rear connecting section 1.3 is small and the tooth width is large, it is easier for the end 1 of the pull tube to be fully inserted into the socket end 2 of the other pull tube. This helps to ensure that the pull tube is assembled in place and effectively reduces the impact on the connection stability between the pull tubes due to improper assembly. At the same time, it can effectively reduce the risk of tooth root breakage of the first rear connecting tooth 1.31.

[0043] Specific embodiment two, such as Figure 1 , Figure 2 , Figure 3 As shown, a top-pull tube has a spigot end 1 at one end and a socket end 2 at the other end. In this embodiment, the outer edge of the spigot end 1 is chamfered by 1.5.

[0044] The outer circumferential surface of the socket end 1 is provided with a first front connecting section 1.1, a first middle connecting section 1.2 and a first rear connecting section 1.3 distributed sequentially along the axial direction of the top pull tube. The first front connecting section 1.1 is close to the end face of the socket end 1.

[0045] The first front connecting segment 1.1 includes at least one first front connecting tooth 1.11 arranged in a ring. In this embodiment, the first front connecting segment 1.1 is composed of one first front connecting tooth 1.11 arranged in a ring.

[0046] The first intermediate connecting section 1.2 includes several first intermediate connecting teeth 1.21 arranged in a ring. Each first intermediate connecting tooth 1.21 is distributed sequentially along the axial direction of the jacking pipe.

[0047] The first rear connecting segment 1.3 includes at least one first rear connecting tooth 1.31 arranged in a ring. In this embodiment, the first rear connecting segment 1.3 is composed of one first rear connecting tooth 1.31 arranged in a ring.

[0048] The tooth width of the first rear connecting tooth 1.31 is greater than the tooth width of the first middle connecting tooth 1.21, and the tooth tip angle α of the first rear connecting tooth 1.31 is less than the tooth tip angle α of the first middle connecting tooth 1.21.

[0049] The tooth width of the first front connecting tooth 1.11 is greater than the tooth width of the first middle connecting tooth 1.21, and the tooth tip angle α of the first front connecting tooth 1.11 is less than the tooth tip angle α of the first rear connecting tooth 1.31.

[0050] In this embodiment, the tooth surface of the first front connecting tooth 1.11 facing the insertion end 1 is a helical tooth surface; the tooth tip angle α of the first front connecting tooth 1.11 refers to the angle between the helical tooth surface of the first front connecting tooth 1.11 and the axis of the top pull tube.

[0051] The tooth surface of the first intermediate connecting tooth 1.21 facing the insertion end 1 is a helical tooth surface; the tooth tip angle α of the first intermediate connecting tooth 1.21 refers to the angle between the helical tooth surface of the first intermediate connecting tooth 1.21 and the axis of the top pull tube.

[0052] The tooth surface of the first rear connecting tooth 1.31 facing the insertion end 1 is a helical tooth surface; the tooth tip angle α of the first rear connecting tooth 1.31 refers to the angle between the helical tooth surface of the first rear connecting tooth 1.31 and the axis of the pull tube.

[0053] The inner circumferential surface of the socket end 2 is provided with a second front connecting section, a second middle connecting section, and a second rear connecting section, which are sequentially distributed along the axial direction of the jacking pipe. The second front connecting section is close to the inner end of the socket end 2. The second rear connecting section is close to the end face of the socket end 2.

[0054] The second front connecting section includes at least one second front connecting tooth that can mate with the first front connecting tooth 1.11; in this embodiment, the second front connecting section is composed of one second front connecting tooth.

[0055] The second intermediate connecting section includes several intermediate connecting teeth that can mate with the first intermediate connecting teeth 1.21. Each intermediate connecting tooth is distributed sequentially along the axial direction of the jacking tube. The intermediate connecting teeth correspond one-to-one with the first intermediate connecting teeth 1.21.

[0056] The second rear connecting segment includes at least one second rear connecting tooth that can mate with the first rear connecting tooth 1.31; in this embodiment, the second rear connecting segment is composed of one second rear connecting tooth.

[0057] When the inlet end 1 of the top pull tube is fully inserted into the socket end 2 of the other top pull tube, the first front connecting tooth 1.11 engages with the second front connecting tooth, the first middle connecting tooth 1.21 engages with the corresponding second middle connecting tooth, and the first rear connecting tooth 1.31 engages with the second rear connecting tooth.

[0058] In the actual construction of this embodiment, during the process of inserting the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe, the first front connecting tooth 1.11 of the spigot end 1 first abuts against the first rear connecting tooth 1.31 in the socket end 2. Since the tooth tip angle of the first front connecting tooth 1.11 of the first front connecting section 1.1 is small and the tooth width is large, it is convenient for the first front connecting tooth 1.11 to squeeze past each connecting tooth (including the second rear connecting tooth, the second middle connecting tooth and the second front connecting tooth) in the socket end 2, thereby facilitating the insertion of the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe. At the same time, since the tooth width of the first front connecting tooth 1.11 is large, it can also effectively avoid the problem of tooth root breakage during the insertion of the first front connecting tooth 1.11.

[0059] Secondly, because the tooth apex angle of each of the first connecting teeth 1.21 in the first connecting section 1.2 is relatively large, after the insertion end 1 of the jacking tube is inserted into the socket end 2 of another jacking tube, it can ensure that the jacking tube is tightly assembled and not easily detached. At the same time, because each connecting tooth (including the second rear connecting tooth, the second middle connecting tooth and the second front connecting tooth) in the socket end 2 is first subjected to compression deformation during the insertion of the first front connecting tooth 1.11, although the tooth apex angle of the first connecting tooth 1.21 is relatively large and the tooth width is relatively small, it is still convenient to insert the first connecting tooth 1.21 and effectively reduce the problem of tooth root breakage of the first connecting tooth 1.21.

[0060] Third, since the tooth tip angle of the first rear connecting tooth 1.31 in the first rear connecting section 1.3 is small and the tooth width is large, it is easier for the end 1 of the pull tube to be fully inserted into the socket end 2 of the other pull tube. This helps to ensure that the pull tube is assembled in place and effectively reduces the impact on the connection stability between the pull tubes due to improper assembly. At the same time, it can effectively reduce the risk of tooth root breakage of the first rear connecting tooth 1.31.

[0061] Furthermore, such as Figure 3 As shown, the tooth height of the first front connecting tooth 1.11 is less than the tooth height of the first middle connecting tooth 1.21. In this embodiment, the tooth height of the first front connecting tooth 1.11 is 1 / 2 to 3 / 4 of the tooth height of the first middle connecting tooth 1.21. This facilitates the first front connecting tooth 1.11 to squeeze past the connecting tooth inside the socket end 2, making it easier to insert the first front connecting tooth 1.11 and thus facilitating the assembly of the top-pull tube. Simultaneously, because the connecting tooth inside the socket end 2 undergoes a compression deformation during the insertion of the first front connecting tooth 1.11, even though the tooth height of the first middle connecting tooth 1.21 is greater than that of the first front connecting tooth 1.11, it still facilitates the insertion of the first middle connecting tooth 1.21 and effectively reduces the problem of tooth root breakage in the first middle connecting tooth 1.21.

[0062] Furthermore, the first connecting teeth 1.21 of the first connecting section 1.2 are set in the following manner: In one embodiment, the tooth tip angle of each first intermediate connecting tooth 1.21 gradually increases from the first front connecting segment 1.1 to the first rear connecting segment 1.3. During the process of inserting the spigot end 1 of one top-pull pipe into the socket end 2 of another top-pull pipe, the closer the first middle connecting tooth 1.21 is to the first front connecting section 1.1, the more connecting teeth in the socket end 2 need to be squeezed. Based on this, in order to further facilitate the assembly of the top-pull pipe while ensuring that the top-pull pipe is tightly assembled and not easy to fall off, this solution gradually increases the tooth tip angle of each first middle connecting tooth 1.21 from the first front connecting section 1.1 to the first rear connecting section 1.3. That is, the tooth tip angle of the first middle connecting tooth 1.21 near the first front connecting section 1.1 is smaller than the tooth tip angle of the first middle connecting tooth 1.21 near the first rear connecting section 1.3. In this way, on the one hand, it can facilitate the insertion of the first middle connecting tooth 1.21 near the first front connecting section 1.1, so as to facilitate the assembly of the top-pull pipe; on the other hand, the first middle connecting tooth 1.21 near the first rear connecting section 1.3 can ensure that the top-pull pipe is tightly assembled and not easy to fall off.

[0063] In this embodiment, the tip angle of the first intermediate connecting tooth 1.21 is 25-35 degrees. For example, the tip angle of the first intermediate connecting tooth 1.21 closest to the first front connecting segment 1.1 is 25 degrees, and the tip angle of the first intermediate connecting tooth 1.21 closest to the first rear connecting segment 1.3 is 35 degrees. Although increasing the tip angle of the first intermediate connecting tooth 1.21 is beneficial to improving the tightness of the jacking tube assembly, it will increase the difficulty of jacking tube assembly and the risk of breakage of the first intermediate connecting tooth 1.21. Therefore, this solution sets the tip angle of the first intermediate connecting tooth 1.21 to 25-35 degrees, which on the one hand ensures that the jacking tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the jacking tube.

[0064] In another embodiment, the tip angle of each first intermediate connecting tooth 1.21 remains consistent. In this embodiment, the tip angle of the first intermediate connecting tooth 1.21 is 25-35 degrees. For example, the tip angle of each first intermediate connecting tooth 1.21 is 30 degrees. Although increasing the tip angle of the first intermediate connecting tooth 1.21 is beneficial to improving the tightness of the pull tube assembly, it will increase the difficulty of pull tube assembly and the risk of breakage of the first intermediate connecting tooth 1.21. Therefore, this solution sets the tip angle of the first intermediate connecting tooth 1.21 to 25-35 degrees, which on the one hand ensures that the pull tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the pull tube.

[0065] Furthermore, such as Figure 3As shown, the tip angle of the first front connecting tooth 1.11 is 5-10 degrees, for example, the tip angle of the first front connecting tooth 1.11 is 5 degrees. The tooth width of the first front connecting tooth 1.11 is 1.5-3 times the tooth width of the first middle connecting tooth 1.21, and the tooth width of the first front connecting tooth 1.11 is twice the tooth width of the first middle connecting tooth 1.21. Although reducing the tip angle of the first front connecting tooth 1.11 is beneficial for its insertion, if the tip angle of the first front connecting tooth 1.11 is too small, it will not be conducive to the tight engagement between the first front connecting tooth 1.11 and the connecting tooth in the socket end 2. Furthermore, during the insertion of the first front connecting tooth 1.11, the squeezing deformation effect on the connecting tooth in the socket end 2 will be weaker, which will not facilitate the subsequent insertion of the first middle connecting tooth 1.21. Therefore, in this design, the tooth tip angle of the first front connecting tooth 1.11 is set to 5-10 degrees, and the tooth width of the first front connecting tooth 1.11 is 1.5-3 times that of the tooth width of the first middle connecting tooth 1.21. This is beneficial for the insertion of the first front connecting tooth 1.11. On the other hand, during the insertion of the first front connecting tooth 1.11, the connecting tooth in the socket end 2 is first subjected to compression deformation, which facilitates the insertion of the first middle connecting tooth 1.21 and effectively reduces the problem of tooth root breakage of the first middle connecting tooth 1.21.

[0066] Furthermore, such as Figure 3 As shown, the tip angle of the first rear connecting tooth 1.31 is 10-20 degrees, for example, 15 degrees. The tooth width of the first rear connecting tooth 1.31 is 1.5-3 times that of the first middle connecting tooth 1.21, for example, twice that of the first middle connecting tooth 1.21. Although reducing the tip angle of the first rear connecting tooth 1.31 is beneficial for the end 1 of the pull tube to be fully inserted into the socket end 2 of the other pull tube, if the tip angle of the first rear connecting tooth 1.31 is too small, it will be detrimental to the connection stability between the pull tubes. Therefore, this solution sets the tip angle of the first rear connecting tooth 1.31 to 10-20 degrees, which on the one hand is beneficial for the end 1 of the pull tube to be fully inserted into the socket end 2 of the other pull tube, and on the other hand is beneficial for improving the connection stability between the pull tubes.

[0067] Furthermore, such as Figure 3 As shown, a top-pull pipe also includes a sealing ring 1.4. A sealing ring groove is provided on the outer circumferential surface of the spigot end 1. The first front connecting section 1.1, the first middle connecting section 1.2, and the first rear connecting section 1.3 are sequentially distributed along the axial direction of the top-pull pipe with respect to the sealing ring groove. The sealing ring 1.4 is disposed within the sealing ring groove. Thus, after the spigot end 1 of the top-pull pipe is fully inserted into the socket end 2 of another top-pull pipe, a sealing structure can be formed between the spigot end and the socket end 2 through the sealing ring, and the sealing structure is close to the port of the socket end 2, thereby ensuring the sealing performance of the top-pull pipe connection.

[0068] Furthermore, the width of the second rear connecting tooth is greater than the width of the second middle connecting tooth, and the apex angle of the second rear connecting tooth is smaller than the apex angle of the second middle connecting tooth. The width of the second front connecting tooth is greater than the width of the second middle connecting tooth, and the apex angle of the second front connecting tooth is smaller than the apex angle of the second rear connecting tooth. In actual construction, during the process of inserting the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe, the first front connecting tooth 1.11 of the spigot end 1 first abuts against the second rear connecting tooth of the second rear connecting section inside the socket end 2. Since the apex angle of the second rear connecting tooth is smaller and the tooth width is larger, it is convenient for each connecting tooth of the spigot end 1 (including the first front connecting tooth 1.11, the first middle connecting tooth 1.21 and the first rear connecting tooth 1.31) to be inserted in sequence, thereby facilitating the insertion of the spigot end 1 of the jacking pipe into the socket end 2 of another jacking pipe. Secondly, because the tooth apex angle of each of the second connecting teeth in the second connecting section is relatively large, after the spigot end 1 of the jacking pipe is inserted into the socket end 2 of another jacking pipe, it can ensure that the jacking pipe is tightly assembled and not easily detached. Thirdly, because the tooth apex angle of the second connecting teeth in the second front connecting section is small and the tooth width is large, it is easier for the spigot end 1 of the jacking pipe to be fully inserted into the socket end 2 of another jacking pipe. This helps to ensure that the jacking pipe is assembled in place and effectively reduces the impact of incomplete assembly of the jacking pipe on the connection stability between the jacking pipes.

[0069] Furthermore, the second connecting teeth of the second connecting section are set in the following manner: In one embodiment, the tip angle of each second intermediate connecting tooth gradually increases from the second front connecting section to the second rear connecting section. In this embodiment, the tip angle of the second intermediate connecting tooth is 25-35 degrees. For example, the maximum tip angle of each second intermediate connecting tooth is 35 degrees, and the minimum tip angle is 25 degrees. Although increasing the tip angle of the second intermediate connecting tooth is beneficial to improving the tightness of the jacking tube assembly, it will increase the difficulty of jacking tube assembly and the risk of breakage of the second intermediate connecting tooth. Therefore, this solution sets the tip angle of the second intermediate connecting tooth to 25-35 degrees, which on the one hand ensures that the jacking tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the jacking tube.

[0070] In one embodiment, the apex angle of each second connecting tooth is consistent. In this embodiment, the apex angle of the second connecting tooth is 25-35 degrees. For example, the apex angle of the second connecting tooth is 30 degrees. Although increasing the apex angle of the second connecting tooth is beneficial to improving the tightness of the pull tube assembly, it will increase the difficulty of the pull tube assembly and the risk of breakage of the second connecting tooth. Therefore, this solution sets the apex angle of the second connecting tooth to 25-35 degrees, which on the one hand ensures that the pull tube assembly is tight and not easy to fall off, and on the other hand, facilitates the assembly of the pull tube.

[0071] Furthermore, the tip angle of the second front connecting tooth is 5-10 degrees, for example, 5 degrees. The tooth width of the second front connecting tooth is 1.5-3 times that of the second middle connecting tooth, for example, twice that of the second middle connecting tooth. Although reducing the tip angle of the second front connecting tooth is beneficial for the proper assembly of the pull tube, an excessively small tip angle would be detrimental to the connection stability between the pull tubes. Therefore, this solution sets the tip angle of the second front connecting tooth to 5-10 degrees, and the tooth width of the first front connecting tooth 1.11 is 1.5-3 times that of the first middle connecting tooth 1.21. This is beneficial for both the proper assembly of the pull tube and the connection stability between the pull tubes.

[0072] Furthermore, the tip angle of the second rear connecting tooth is 10-20 degrees, for example, 15 degrees. The width of the second rear connecting tooth is 1.5-3 times the width of the second middle connecting tooth, for example, twice the width of the second middle connecting tooth. Although reducing the tip angle of the second rear connecting tooth is beneficial for the sequential insertion of each connecting tooth (including the first front connecting tooth 1.11, the first middle connecting tooth 1.21, and the first rear connecting tooth 1.31) at the insertion end 1, if the tip angle of the second rear connecting tooth is too small, it will be detrimental to the connection stability between the pull tubes. Therefore, this solution sets the tip angle of the first rear connecting tooth 1.31 to 10-20 degrees, which on the one hand is beneficial for the sequential insertion of each connecting tooth (including the first front connecting tooth 1.11, the first middle connecting tooth 1.21, and the first rear connecting tooth 1.31) at the insertion end 1, and on the other hand, it is beneficial for improving the connection stability between the pull tubes.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A type of push-pull pipe, wherein one end is a spigot end and the other end is a socket end, characterized in that, The outer peripheral surface of the socket end is provided with a first front connecting section, a first middle connecting section and a first rear connecting section distributed sequentially along the axial direction of the top pulling tube. The first front connecting section is close to the end face of the socket end. The first front connecting section includes at least one annular first front connecting tooth. The first middle connecting section includes several annular first middle connecting teeth distributed sequentially along the axial direction of the top pulling tube. The first rear connecting section includes at least one annular first rear connecting tooth. The tooth width of the first rear connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth tip angle of the first rear connecting tooth is smaller than the tooth tip angle of the first middle connecting tooth. The tooth width of the first front connecting tooth is greater than the tooth width of the first middle connecting tooth, and the tooth tip angle of the first front connecting tooth is smaller than the tooth tip angle of the first rear connecting tooth.

2. The top-pull tube according to claim 1, characterized in that, The tooth tip angle of each first intermediate connecting tooth gradually increases from the first front connecting segment to the first rear connecting segment.

3. The top-pull tube according to claim 1, characterized in that, The tooth height of the first front connecting tooth is less than the tooth height of the first middle connecting tooth.

4. A top-pull tube according to claim 1, 2, or 3, characterized in that, The tooth tip angle of the first connecting tooth is 25-35 degrees.

5. A top-pull tube according to claim 1, 2, or 3, characterized in that, The first front connecting tooth has a tooth tip angle of 5-10 degrees, and the tooth width of the first front connecting tooth is 1.5-3 times the tooth width of the first middle connecting tooth; the first rear connecting tooth has a tooth tip angle of 10-20 degrees, and the tooth width of the first rear connecting tooth is 1.5-3 times the tooth width of the first middle connecting tooth.

6. A top-pull tube according to claim 1, 2, or 3, characterized in that, The inner circumferential surface of the socket end is provided with a second front connecting section, a second middle connecting section and a second rear connecting section distributed sequentially along the axial direction of the top-pull pipe, with the second front connecting section being close to the inner end of the socket end; The second front connecting section includes at least one second front connecting tooth that can mate with the first front connecting tooth; The second intermediate connecting section includes several second intermediate connecting teeth that can mate with the first intermediate connecting teeth, and each second intermediate connecting tooth is distributed sequentially along the axial direction of the jacking tube. The second rear connecting section includes at least one second rear connecting tooth that can mate with the first rear connecting tooth; The tooth width of the second rear connecting tooth is greater than the tooth width of the second middle connecting tooth, and the tooth tip angle of the second rear connecting tooth is smaller than the tooth tip angle of the second middle connecting tooth; The tooth width of the second front connecting tooth is greater than the tooth width of the second middle connecting tooth, and the tooth tip angle of the second front connecting tooth is smaller than the tooth tip angle of the second rear connecting tooth.

7. A top-pull tube according to claim 6, characterized in that, The tooth tip angle of each second intermediate connecting tooth gradually increases from the second front connecting segment to the second rear connecting segment.

8. A top-pull tube according to claim 6, characterized in that, The tip angle of the second connecting tooth is 25-35 degrees.

9. A top-pull tube according to claim 6, characterized in that, The tip angle of the second front connecting tooth is 5-10 degrees, and the tooth width of the second front connecting tooth is 1.5-3 times the tooth width of the second middle connecting tooth; The tip angle of the second rear connecting tooth is 10-20 degrees, and the tooth width of the second rear connecting tooth is 1.5-3 times the tooth width of the second middle connecting tooth.

10. A top-pull tube according to claim 6, characterized in that, It also includes a sealing ring, and the outer peripheral surface of the socket end is provided with a sealing ring groove. The first front connecting section, the first middle connecting section, the first rear connecting section and the sealing ring groove are distributed sequentially along the axial direction of the top pull tube, and the sealing ring is disposed in the sealing ring groove.

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