Polyethylene (PE) permeation pipe expanding device

Abstract

The invention relates to the technical field of diameter expanding equipment, in particular to a PE permeation pipe diameter expanding device which comprises two symmetrically-arranged circular-truncated-cone-shaped diameter expanding cones and a round-rod-shaped mounting rod used for supporting the two diameter expanding cones, and the diameter expanding cones can be connected to the surface of the mounting rod in a sleeving mode to move. The small end of the expanding cone is provided with a pipe expanding assembly used for expanding. The pipe expanding assembly comprises a plurality of inner-layer extrusion assemblies and an outer-layer extrusion assembly; when different PE permeation pipes are expanded, the first extrusion plates are increased or decreased or replaced, all the inner layer extrusion assemblies are composed of the constraint rings and the multiple first extrusion plates, so that operation is very convenient, a limiting plate can be driven to move when an internal thread sleeve is rotated, and the inner layer extrusion assemblies are convenient to use. And the limiting plate can be ensured not to move when being subjected to horizontal force without an additional locking structure, so that the expanding length is determined, the overall structure is relatively simple, and meanwhile, the operation is also very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of diameter expansion equipment, and specifically proposes a PE permeation pipe diameter expansion device. Background Art

[0002] When producing PE infiltration pipes, some companies will wash, crush, granulate and process the recycled waste PE plastic products to make recycled PE particles for the production of PE infiltration pipes. Most PE infiltration pipes are buried underground and are usually used for water supply and drainage. In municipal water supply and drainage projects, the diameters of PE infiltration pipes used in different environments are different. For communities with large water supply and drainage volumes, the diameters of PE infiltration pipes will also be larger. As the drainage volume gradually increases, the diameter of the previous PE infiltration pipes is difficult to meet the use requirements. Therefore, the problem will be solved by replacing or adding larger diameter PE infiltration pipes. The staff usually expands the end of the original PE infiltration pipe and installs a larger diameter PE infiltration pipe through a pipe joint. However, the current expander has the following problems:

[0003] Traditional pipe expanders can achieve a small range of diameter expansion on the end of PE permeation pipes. However, in actual use, the larger the diameter of the PE pipe, the longer the diameter expansion length usually needs to be increased accordingly in order to ensure the stability and sealing of the connection, to allow the fluid to transition smoothly at the pipe joint, to reduce resistance and eddy currents, and to ensure that the pipe material can deform evenly during the diameter expansion process to achieve the expected diameter expansion effect. Therefore, traditional pipe expanders are limited by their fixed end length when in use. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a PE permeation pipe diameter expansion device, which is used to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a PE permeation pipe expansion device, comprising two symmetrically arranged truncated cone-shaped expansion cones with a central portion penetrating therethrough and a round rod-shaped mounting rod for supporting the two expansion cones, the expansion cones are sleeved on the surface of the mounting rod for movement, and the small end of the expansion cone is provided with an expansion tube assembly for expansion; the expansion tube assembly comprises a plurality of inner layer extrusion assemblies and an outer layer extrusion assembly; the inner layer extrusion assembly comprises a plurality of fan-shaped extrusion plates with fan-shaped baffles on both sides, and the plurality of extrusion plates can be formed into a circular ring through an elastic binding ring, and the inner layer extrusion assembly from the inside to the outside is expanded. The number of extrusion plates 1 of the pressing assembly gradually increases, and the baffles on both sides of the extrusion plate 1 of the outer ring are located on the inner side of the baffles on both sides of the extrusion plate 1 of the inner ring; the outer layer extrusion assembly includes a plurality of fan-shaped extrusion plates 2 with fan-shaped baffles on one side and a plurality of fan-shaped expansion plates without baffles on both sides, the side of the extrusion plate 2 without baffles is close to the expansion cone, and the plurality of extrusion plates 2 and expansion plates are respectively formed into a circular ring shape by two groups of binding rings, one side of the expansion plate is against the baffle of the extrusion plate 2, and the number of the expansion plates is greater than the number of the extrusion plate 2; the surface of the mounting rod is provided with a positioning assembly for limiting the position of the expansion assembly.

[0006] Preferably, the positioning assembly includes an annular limiting plate whose diameter is smaller than that of the innermost inner layer extrusion assembly, and the surface of the mounting rod is provided with two unconnected thread grooves, and one side of the limiting plate is equipped with an internally threaded sleeve whose inner side is adapted to the thread groove, and the internally threaded sleeve is sleeved in the thread groove position of the mounting rod, and the side of the limiting plate close to the expansion tube assembly is equipped with a plurality of evenly laid balls.

[0007] Preferably, it also includes a hydraulic cylinder for supplying liquid and pressure, and the surface of the mounting rod is equipped with no less than one double-headed hydraulic rod through a connecting pipe, and both ends of the double-headed hydraulic rod are fixedly arranged on the large end of the expansion cone. The mounting rod contains at least two channels for circulating liquid, and the liquid in the hydraulic cylinder enters the interior of the double-headed hydraulic rod through the internal channels of the mounting rod and the connecting pipe to implement pressure increase and pressure reduction.

[0008] Preferably, the expansion cone is slidably sleeved on the surface of the internal threaded sleeve, and its small end abuts against the inner wall of the innermost inner extrusion component, and a plurality of cross-shaped grooves are arranged in an annular array on the surface of the expansion cone. A slider with rotating shafts on both sides is fixedly arranged on one side of each extrusion plate of the innermost inner extrusion component, and the slider is inserted into the inside of the groove and is easy to move.

[0009] Preferably, the liquid flow pipe port of the hydraulic cylinder is connected to the liquid pipe in the mounting rod through a flexible pipe, and the hydraulic cylinder is mounted on a base, and the base is always placed on the outside of the PE permeation pipe that needs to be expanded. Both ends of the mounting rod are equipped with retractable support rods with fan-shaped tops and springs arranged inside. One of the support rods is mounted on the base, and the other support rod is placed inside the PE permeation pipe, and a roller is installed at the bottom, and a fixed rod for positioning is arranged on the top, and the top of the fixed rod moves radially through the mounting rod.

[0010] Preferably, the liquid flow pipe port of the hydraulic cylinder is connected to the liquid pipe in the mounting rod through a rigid pipe, the bottom of the hydraulic cylinder is equipped with a plurality of spring seats for shock absorption and is installed on a base through a support frame assembly, the base is always placed on the outside of the PE permeation pipe that needs to be expanded, both ends of the mounting rod are equipped with support rods with fan-shaped tops and adjustable heights, the top of the support rod is provided with a support plate for supporting the mounting rod, the support plate is suspended above the support rod through a fixing rod and a spring, one of the support rods is mounted on the base, the other support rod is placed inside the PE permeation pipe, and a roller is mounted at the bottom, a fixing rod for positioning is arranged at the top, the top of the fixing rod is radially movable through the mounting rod, and the mounting rod has a certain amount of moving space margin.

[0011] Preferably, the support frame assembly includes a rotating tube which is assembled on the base through a bearing and has a thread inside. A threaded rod with a mounting plate on the top is adapted to be installed in the rotating tube. The support rod installed on the base is assembled by a rotating tube with a bearing and a threaded rod. A driving assembly is installed in the base for raising and lowering the hydraulic cylinder and the mounting rod at the same time.

[0012] Preferably, the driving assembly includes two gear ones respectively fixedly mounted on the lower end of the rotating tube, the two gear ones are connected by a gear chain, a motor for driving is mounted on the base, a gear two with a diameter smaller than that of gear one is fixedly mounted on the output shaft of the motor, and the gear two is meshed with one of the gear ones.

[0013] Preferably, two different three-hole clamps are installed on the surface of the hydraulic cylinder and the mounting rod respectively, the centers of the side holes of the two three-hole clamps are located on the same horizontal line, and the side holes on the same side of the two three-hole clamps are filled with connecting rods for rigid auxiliary installation.

[0014] Preferably, the diameter of the contact position between the connecting rod and the three-hole clamp is exactly matched with the inner diameter of the side hole of the three-hole clamp, and the diameter of the non-contact position between the connecting rod and the three-hole clamp is larger than the inner diameter of the side hole of the three-hole clamp.

[0015] 1. The above technical solution has the following advantages or beneficial effects: The present invention provides a PE permeation pipe expansion device. When expanding different PE permeation pipes, the extrusion plate is added, reduced or replaced. Since all the inner layer extrusion components are composed of a restraining ring and a plurality of extrusion plates, the operation is very convenient. When the internal threaded sleeve is rotated, the limit plate can be driven to move, and no additional locking structure is required to ensure that the limit plate itself will not move when subjected to horizontal force, thereby determining the expansion length. The overall structure is relatively simple and the operation is also very convenient.

[0016] 2. The above technical solution has the following advantages or beneficial effects: The present invention provides a PE permeation tube expansion device. During the expansion process, liquid enters the interior of the mounting rod from the hydraulic cylinder through a flexible pipe. The liquid pressure is used to move the output shaft of the double-headed hydraulic rod, thereby moving the expansion cone to the interior of the inner layer extrusion assembly on the inner side. The pressure of the extrusion plate 1 and the extrusion plate 2 is transmitted to move the expansion plate, thereby realizing the expansion function. The connection method of the flexible pipe is simple and can adapt to PE permeation tubes at different heights.

[0017] 3. The above technical solution has the following advantages or beneficial effects: The present invention provides a PE permeation pipe expansion device, which adopts a rigid pipe connection method and utilizes the transmission effect of a motor, two gears one, gear two and a toothed chain to make the two threaded rods rise to a certain height. The height requirement is that when the mounting rod is installed, its center needs to be basically on the same horizontal line as the center of the PE permeation pipe, so as to adapt to PE permeation pipes of different heights. The spring seat can provide a certain elastic force to reduce the gravity influence of the hydraulic cylinder and ensure the stability of the rigid pipe connection. At the same time, the spring also provides a certain elastic force for both ends of the mounting rod to ensure that the mounting rod has a certain space margin when moving, thereby ensuring the normal use of the expansion function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings, which are not drawn to scale, with emphasis on illustrating the subject matter of the present invention.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of Example 1 of a PE permeation tube diameter expansion device provided by the present invention.

[0020] Figure 2 It is a schematic diagram of the disassembled structure of the support rod in Example 1 of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of Example 2 of a PE permeation tube diameter expansion device provided by the invention.

[0022] Figure 4 It is a schematic diagram of the partially disassembled structure of the outer layer extrusion component.

[0023] Figure 5 It is a schematic diagram of the partially disassembled structure of the installation position of the expansion cone and the limit plate.

[0024] Figure 6 It is a schematic diagram of the partially disassembled structure of the expansion tube assembly.

[0025] Figure 7 It is a partial structural schematic diagram of the support rod position of Example 2.

[0026] Figure 8 It is a schematic diagram of the installation of the structure above the base.

[0027] Fig. 9 It is a schematic diagram of the installation structure of the gears and toothed chain inside the base.

[0028] Fig.10 It is a schematic diagram of the split structure of the three-hole clamp and the connecting rod.

[0029] In the figure: 1. expansion cone; 2. mounting rod; 3. extrusion plate 1; 4. restraining ring; 5. extrusion plate 2; 6. expansion plate; 7. limit plate; 8. internal threaded casing; 9. ball; 10. hydraulic cylinder; 11. double-headed hydraulic rod; 12. groove; 13. slider; 14. flexible pipe; 15. base; 16. spring; 17. support rod; 18. roller; 19. fixing rod; 20. rigid pipe; 21. spring seat; 22. support plate; 23. rotating tube; 24. threaded rod; 25. gear 1; 26. motor; 27. gear 2; 28. three-hole clamp; 29. ​​connecting rod; 30. tooth chain. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 4As shown, a PE permeation pipe expansion device comprises two symmetrically arranged truncated cone-shaped expansion cones 1 with a central portion penetrating therethrough and a round rod-shaped mounting rod 2 for supporting the two expansion cones 1. The expansion cones 1 are sleeved on the surface of the mounting rod 2 for movement. The large ends of the two expansion cones 1 are arranged opposite to each other. During the expansion process, the two expansion cones 1 need to be pushed away from each other. The small end of the expansion cone 1 is provided with an expansion tube assembly for expansion. When the expansion cone 1 is pressed against the inside of the expansion tube assembly, the purpose of expansion can be achieved.

[0033] like Figure 6 As shown, the expansion tube assembly includes multiple inner layer extrusion assemblies and an outer layer extrusion assembly. In this embodiment, the number of inner layer extrusion assemblies is set to two layers. As the number of inner layer extrusion assemblies increases, the diameter of the pipe that can be expanded will also increase. Therefore, when using it, the staff needs to first determine the inner diameter of the PE permeation tube, and then select the number of layers of the inner layer extrusion assembly that is suitable for the PE permeation tube.

[0034] The inner layer extrusion assembly includes a plurality of fan-shaped extrusion plates 3 with fan-shaped baffles on both sides, such as Figure 5-6 As shown, each extrusion plate 3 has a concave groove on its surface, and multiple extrusion plates 3 can be formed into a circular ring by an elastic binding ring 4. The binding ring 4 is installed inside the concave groove, and the surface height of the binding ring 4 does not exceed the surface height of the extrusion plate 3 itself, thereby ensuring that during the expansion process of the extrusion plate 3, its extrusion force is always applied to the extrusion plate 3, and the number of extrusion plates 3 of the inner layer extrusion assembly increases gradually from the inside to the outside, and the baffles on both sides of the extrusion plate 3 of the outer circle are located on the inner side of the baffles on both sides of the extrusion plate 3 of the inner circle, ensuring that the extrusion plate 3 will not produce lateral displacement during the outward movement. Since all the inner layer extrusion assemblies are composed of the binding ring 4 and multiple extrusion plates 3, it is more convenient to increase, decrease or replace the extrusion plate 3.

[0035] like Figure 4 As shown, the outer layer extrusion assembly includes a plurality of fan-shaped extrusion plates 2 5 with fan-shaped baffles on one side and a plurality of fan-shaped expansion plates 6 without baffles on both sides. Similarly, the baffles of the extrusion plate 2 5 also abut against the inner sides of the baffles on both sides of the adjacent inner extrusion plate 1 3. The side of the extrusion plate 2 5 without a baffle is close to the expansion cone 1. The plurality of extrusion plates 2 5 and the expansion plates 6 are respectively formed into a circular ring shape by two groups of restraining rings 4. Similarly, the surfaces of the extrusion plate 2 5 and the expansion plates 6 also have grooves for installing the restraining rings 4. It should be noted that the surface height of the expansion plate 6 must be greater than the surface height of the side plate of the extrusion plate 2 5, so as to ensure that the side of the expansion plate 6 abuts against the inner wall of the PE permeation tube, and one side of the expansion plate 6 abuts against the baffle of the extrusion plate 2 5. The number of expansion plates 6 is greater than the number of extrusion plates 2 5. Both the extrusion plate 2 5 and the expansion plate 6 can be replaced to adapt to different PE permeation tubes.

[0036] The surface of the mounting rod 2 is provided with a positioning assembly for limiting the position of the expansion tube assembly, such as Figure 1 and Figure 3 As shown, it is ensured that the expansion tube assembly can expand smoothly.

[0037] The positioning assembly includes an annular stop plate 7 having a diameter smaller than that of the innermost extrusion assembly. Figure 4-5 As shown, the surface of the mounting rod 2 is provided with two unconnected threaded grooves, and one side of the limiting plate 7 is equipped with an inner threaded sleeve 8 that is adapted to the threaded groove. The inner threaded sleeve 8 and the limiting plate 7 are an integrally formed structure, and the outer diameter of the limiting plate 7 is the same as the outer diameter of the inner layer extrusion component on the inner side, and the inner threaded sleeve 8 is sleeved in the threaded groove position of the mounting rod 2, so as to ensure that the movement of the limiting plate 7 can be driven when the inner threaded sleeve 8 is rotated, and no additional locking structure is required to ensure that the limiting plate 7 itself will not move when subjected to horizontal force, and the expansion length range of the entire equipment can be changed by changing the distance between the two limiting plates 7. The structure and operation are very simple and convenient, and a plurality of evenly laid balls 9 are installed on the side of the limiting plate 7 close to the expansion tube component, which can rotate 360°, so as to ensure that when the extrusion plate 3 reaches the limiting plate 7, it can smoothly move away from the center of the circle to complete the expansion.

[0038] like Figure 1 and Figure 3-4 As shown, the present application also includes a hydraulic cylinder 10 for supplying fluid and pressure. The surface of the mounting rod 2 is equipped with no less than one double-headed hydraulic rod 11 through a connecting pipe. The two ends of the double-headed hydraulic rod 11 are fixedly arranged on the large end of the expansion cone 1. When the expansion cone 1 is pushed to move, it is sufficient to ensure that the expansion cone 1 can be evenly stressed. The mounting rod 2 contains at least two channels for circulating liquid. The liquid in the hydraulic cylinder 10 enters the interior of the double-headed hydraulic rod 11 through the internal channels of the mounting rod 2 and the connecting pipe to implement pressure increase and pressure reduction. When the pressure is increased, it means pushing the two expansion cones 1 away from the double-headed hydraulic rod 11, and when the pressure is reduced, it means pulling the expansion cone 1 close to the double-headed hydraulic rod 11.

[0039] like Figure 4-5 As shown, the expansion cone 1 is slidably sleeved on the surface of the internal threaded sleeve 8, and its small end is against the inner wall of the innermost inner extrusion component. The surface of the expansion cone 1 is provided with a plurality of cross-shaped grooves 12 in an annular array. In the present application, the number of the grooves 12 is provided with six. A slider 13 with a rotating shaft on both sides is fixedly provided on one side of each extrusion plate 3 of the innermost inner extrusion component. The slider 13 is inserted into the interior of the groove 12 and is easy to move, so that the inner extrusion component is stably pressed against the limit plate 7. When the expansion cone 1 moves, the groove 12 squeezes the slider 13 to indirectly squeeze the extrusion plate 3. At the same time, the rotatable rotating shaft can reduce the friction between the slider 13 and the groove 12 as much as possible, so as to ensure that more effort can be saved during the expansion process.

[0040] In the present application, the connection between the hydraulic cylinder 10 and the mounting rod 2 is divided into the following two embodiments:

[0041] Example 1

[0042] like Figure 1 and Figure 2 As shown, a flexible pipe 14 is used to connect the hydraulic cylinder 10 with the interior of the mounting rod 2. The hydraulic cylinder 10 is mounted on a base 15, and the base 15 is placed on the ground at the construction site. To ensure its stability, the staff can fix it on the ground by expansion bolts or other means. The base 15 is always placed on the outside of the PE penetration pipe that needs to be expanded. Both ends of the mounting rod 2 are equipped with a retractable support rod 17 with a fan-shaped top and a spring 16 arranged inside. The inner rod and the outer rod of the support rod 17 can slide relative to each other, but are affected by the elastic force of the spring 16. One of the support rods 17 is mounted on the base 15, and the other support rod 17 is placed inside the PE penetration pipe, and a roller 18 is installed at the bottom thereof to facilitate moving the entire device to the inside of the PE penetration pipe. A fixing rod 19 for positioning is arranged on the top thereof, and the top of the fixing rod 19 is radially movable and penetrates along the mounting rod 2 to prevent the mounting rod 2 from falling off from the top of the support rod 17.

[0043] In this embodiment, during the expansion process, the liquid enters the interior of the mounting rod 2 from the hydraulic cylinder 10 through the flexible pipe 14, and the liquid pressure is used to move the output shaft of the double-headed hydraulic rod 11, thereby moving the expansion cone 1 to the inner layer extrusion assembly on the inner side, and the pressure of the extrusion plate 1 3 and the extrusion plate 2 5 is transmitted to move the expansion plate 6, thereby realizing the expansion function. Although different PE permeation tubes have different inner diameters, the expansion plate 6 automatically expands evenly, so the center position of the mounting rod 2 will automatically adapt to the PE permeation tube. The flexible pipe 14 can ensure the displacement margin of the mounting rod 2, but there are the following problems during use.

[0044] When the strength of the PE permeation pipe that needs to be expanded is greater, a greater thrust is needed to push the expansion cone 1 to move, which requires a greater liquid pressure. However, the pressure resistance limit value of the flexible pipe 14 itself is certain. When the required hydraulic pressure is greater than the limit value, the flexible pipe 14 will be damaged. Therefore, it is greatly affected by the PE permeation pipe itself during use, and a different connection method needs to be replaced.

[0045] Example 2

[0046] like Figure 3As shown, a rigid pipe 20 is used to connect the hydraulic cylinder 10 with the interior of the mounting rod 2. Similarly, the staff can fix it on the ground by expansion bolts or other means. The base 15 is always placed outside the PE permeation pipe that needs to be expanded. The bottom of the hydraulic cylinder 10 is equipped with a plurality of spring seats 21 for shock absorption and is installed on a base 15 through a support frame assembly to ensure that the hydraulic cylinder 10 has a certain amount of moving space. The two ends of the mounting rod 2 are equipped with support rods 17 with fan-shaped tops and adjustable heights. The top of the support rod 17 is provided with a support for supporting the mounting rod 2. Plate 22, the mounting rod 2 has a little space to move in any direction, the support plate 22 is suspended above the support rod 17 through the fixing rod 19 and the spring 16, and it is best to sleeve the spring 16 on the surface of the fixing rod 19, one of the support rods 17 is assembled on the base 15, and the other support rod 17 is placed inside the PE permeation pipe, and a roller 18 is installed at the bottom to facilitate moving the entire device to a suitable position, and a fixing rod 19 for positioning is arranged on the top, and the top of the fixing rod 19 is radially movable and penetrates along the mounting rod 2, and the mounting rod 2 has a certain amount of moving space margin.

[0047] like Figure 8 As shown, the support frame assembly includes a rotating tube 23 with a thread inside, which is assembled on the base 15 through a bearing. A threaded rod 24 with a mounting plate on the top is adapted to be installed in the rotating tube 23, which also ensures the function of stopping and locking. Facing PE permeation pipes in different positions, its height can also be adjusted and adapted. The support rod 17 installed on the base 15 is assembled by the rotating tube 23 with a bearing and the threaded rod 24. The base 15 is equipped with a driving assembly for making the hydraulic cylinder 10 and the mounting rod 2 rise and fall at the same time, as shown in FIG. Figure 7 As shown, the support rod 17 placed inside the PE permeation tube is also assembled by a threaded rod 24 and a rotating tube 23, but a bearing is installed on the top of the threaded rod 24 and connected to the support plate 22 on the top of the support rod 17 to prevent the rotating tube 23 from rotating inside the PE permeation tube.

[0048] like Fig. 9 As shown, the driving assembly includes two gears 25 fixedly mounted on the lower ends of the rotating tubes 23, the two gears 25 are connected by a toothed chain 30, a motor 26 for driving is mounted on the base 15, a gear 27 with a diameter smaller than that of the gear 25 is fixedly mounted on the output shaft of the motor 26, the gear 27 is meshed with one of the gears 25, the bottom of the base 15 is configured to be openable and closable, the motor 26 drives the gear 27 to rotate, the two rotating tubes 23 are rotated by the transmission effect of the two gears 25 and the toothed chain 30, and the threaded rod 24 is lifted and lowered. Since the hydraulic cylinder 10 is rigidly connected to the mounting rod 2, it is necessary to ensure that the rising and falling heights of the two are exactly the same to avoid damage to the rigid pipe 20.

[0049] like Fig.10 As shown, two different three-hole clamps 28 are respectively installed on the surface of the hydraulic cylinder 10 and the mounting rod 2, and the center points of the side holes of the two three-hole clamps 28 are located on the same horizontal line. The side holes on the same side of the two three-hole clamps 28 are filled with connecting rods 29 for rigid auxiliary installation, ensuring that the rigid connection between the mounting rod 2 and the hydraulic cylinder 10 is more stable and protecting the rigid pipe 20. The diameter of the contact position between the connecting rod 29 and the three-hole clamp 28 is just adapted to the inner diameter of the side holes of the three-hole clamp 28, and the diameter of the non-contact position between the connecting rod 29 and the three-hole clamp 28 is larger than the inner diameter of the side holes of the three-hole clamp 28, preventing the connecting rod 29 from falling off from the inside of the three-hole clamp 28.

[0050] In this embodiment, it is necessary to first utilize the transmission effect of the motor 26, two gears 1 25, gear 2 27 and the toothed chain 30 to make the two threaded rods 24 rise to a certain height. The height requirement is that when the mounting rod 2 is installed, its center needs to be basically on the same horizontal line with the center of the PE permeation tube, and there can be a certain error. Then when the entire equipment enters the interior of the PE permeation tube for expansion, the expansion plate 6 automatically expands evenly. When the expansion plate 6 contacts the inner wall of the PE permeation tube, due to the presence of a certain error, the mounting rod 2 will drive the hydraulic cylinder 10 to move in a small range through the three-hole clamp 28 and the connecting rod 29. At this time, the spring seat 21 can provide a certain elastic force, reduce the gravity influence of the hydraulic cylinder 10, ensure the stable connection of the rigid pipe 20, and at the same time avoid damage or warping caused by excessive gravity at one end of the mounting rod 2.

[0051] There are certain differences between the first embodiment and the second embodiment in use, and the use method needs to be selected according to the required hydraulic pressure.

[0052] The present invention provides a PE permeation pipe expansion device. The length to be expanded and the diameter of the PE permeation pipe are determined, different inner layer extrusion components and outer layer extrusion components are replaced, and the transmission effect of the motor 26, two gears 1 25, gear 2 27 and toothed chain 30 is used to make the two threaded rods 24 rise to the installation rod 2 and the center of the PE permeation pipe basically on the same horizontal line. At the same time, the support rods 17 installed on the inner side of the PE permeation pipe are adjusted to the same height and moved to the working position. The two internal threaded sleeves 8 are respectively rotated to drive the movement of the limit plate 7, and the two expansion tube components are moved to the surface of the limit plate 7. At this time, the liquid is pushed from the hydraulic The cylinder 10 enters the interior of the mounting rod 2 through the flexible pipe 14, and uses the liquid pressure to move the output shaft of the double-headed hydraulic rod 11, thereby moving the expansion cone 1 to the inner layer extrusion assembly on the inner side, and the pressure of the extrusion plate 1 3 and the extrusion plate 2 5 is transmitted to move the expansion plate 6, and the expansion plate 6 automatically expands evenly. When the expansion plate 6 contacts the inner wall of the PE permeation tube, due to a certain error, the mounting rod 2 will drive the hydraulic cylinder 10 to move in a small range through the three-hole clamp 28 and the connecting rod 29. At this time, the spring seat 21 can provide a certain elastic force to reduce the gravity effect of the hydraulic cylinder 10, thereby achieving diameter expansion.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0055] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A PE permeation pipe expansion device, characterized in that: The invention comprises two symmetrically arranged truncated cone-shaped expansion cones (1) with a central portion penetrating therethrough and a round rod-shaped mounting rod (2) for supporting the two expansion cones (1); the expansion cones (1) are sleeved on the surface of the mounting rod for axial movement; and a tube expansion assembly for expanding the diameter is provided at the small end of the expansion cone (1); The expansion tube assembly includes a plurality of inner layer extrusion assemblies and an outer layer extrusion assembly; The inner layer extrusion assembly comprises a plurality of fan-shaped extrusion plates (3) with fan-shaped baffles on both sides. The plurality of extrusion plates (3) can be formed into a circular ring by means of an elastic binding ring (4). The number of extrusion plates (3) of the inner layer extrusion assembly increases gradually from the inside to the outside, and the baffles on both sides of the extrusion plate (3) of the outer ring are located on the inner side of the baffles on both sides of the extrusion plate (3) of the inner ring; The outer layer extrusion assembly comprises a plurality of fan-shaped extrusion plates (5) with fan-shaped baffles on one side and a plurality of fan-shaped expansion plates (6) without baffles on both sides, the side of the extrusion plate (5) without baffles is close to the expansion cone (1), the plurality of extrusion plates (5) and the expansion plates (6) are respectively formed into a circular ring shape through two groups of restraining rings (4), one side of the expansion plates (6) is against the baffle of the extrusion plate (5), and the number of the expansion plates (6) is greater than the number of the extrusion plates (5); The surface of the installation rod (2) is provided with a positioning assembly for limiting the position of the expansion tube assembly.

2. A PE permeation pipe diameter expansion device according to claim 1, characterized in that: The positioning assembly comprises an annular limiting plate (7) having a diameter smaller than that of the innermost extrusion assembly. The surface of the mounting rod (2) is provided with two sections of unconnected thread grooves. One side of the limiting plate (7) is provided with an internal thread sleeve (8) having an inner side adapted to the thread groove. The internal thread sleeve (8) is sleeved on the thread groove position of the mounting rod (2). The side of the limiting plate (7) close to the expansion tube assembly is provided with a plurality of evenly laid balls (9).

3. A PE permeation pipe diameter expansion device according to claim 2, characterized in that: It also includes a hydraulic cylinder (10) for supplying liquid and pressure. The surface of the mounting rod (2) is equipped with at least one double-headed hydraulic rod (11) through a connecting pipe. The two ends of the double-headed hydraulic rod (11) are fixedly arranged on the large end of the expansion cone (1). The mounting rod (2) contains at least two channels for circulating liquid. The liquid in the hydraulic cylinder (10) enters the interior of the double-headed hydraulic rod (11) through the internal channels of the mounting rod (2) and the connecting pipe to increase and reduce the pressure.

4. A PE permeation pipe diameter expansion device according to claim 3, characterized in that: The expansion cone (1) is slidably sleeved on the surface of the internal threaded sleeve (8), and its small end is against the inner wall of the innermost inner layer extrusion component. The surface of the expansion cone (1) is provided with a plurality of cross-shaped grooves (12) in an annular array. A slider (13) with rotating shafts on both sides is fixedly provided on one side of each extrusion plate (3) of the innermost inner layer extrusion component. The slider (13) is inserted into the interior of the groove (12) and is easy to move.

5. A PE permeation pipe diameter expansion device according to claim 3, characterized in that: The liquid flow pipe port of the hydraulic cylinder (10) is connected to the liquid pipe in the installation rod (2) through a flexible pipe (14). The hydraulic cylinder (10) is mounted on a base (15). The base (15) is always placed outside the PE permeation pipe that needs to be expanded. Both ends of the installation rod (2) are equipped with retractable support rods (17) with fan-shaped tops and springs (16) arranged inside. One of the support rods (17) is mounted on the base (15), and the other support rod (17) is placed inside the PE permeation pipe. The bottom of the support rod (17) is equipped with a roller (18). A fixed rod (19) for positioning is arranged on the top of the support rod. The top of the fixed rod (19) moves radially through the installation rod (2).

6. A PE permeation pipe diameter expansion device according to claim 3, characterized in that: The liquid flow conduit port of the hydraulic cylinder (10) is connected to the liquid conduit in the mounting rod (2) through a rigid conduit (20); a plurality of spring seats (21) for shock absorption are installed at the bottom of the hydraulic cylinder (10) and are installed on a base (15) through a support frame assembly; the base (15) is always placed outside the PE permeation pipe that needs to be expanded; support rods (17) with fan-shaped tops and adjustable heights are installed at both ends of the mounting rod (2); the top of the support rod (17) is provided with a spring for supporting the mounting rod. The invention relates to a support plate (22) of the mounting rod (2), wherein the support plate (22) is suspended above the support rod (17) through a fixing rod (19) and a spring (16), wherein one of the support rods (17) is mounted on a base (15), and the other support rod (17) is placed inside the PE permeation pipe, and a roller (18) is mounted on the bottom of the support rod, and a fixing rod (19) for positioning is arranged on the top of the support rod, and the top of the fixing rod (19) is movable and penetrates the mounting rod (2) in a radial direction, and the mounting rod (2) has a certain amount of moving space margin.

7. A PE permeation pipe diameter expansion device according to claim 6, characterized in that: The support frame assembly comprises a rotating tube (23) which is assembled on a base (15) via a bearing and has a thread inside. A threaded rod (24) with a mounting plate on the top is adapted to be mounted inside the rotating tube (23). The support rod (17) mounted on the base (15) is assembled by the rotating tube (23) with a bearing and the threaded rod (24). A driving assembly is assembled inside the base (15) for simultaneously lifting and lowering the hydraulic cylinder (10) and the mounting rod (2).

8. A PE permeation pipe diameter expansion device according to claim 7, characterized in that: The driving assembly comprises two gears (25) respectively fixedly mounted on the lower ends of the rotating tube (23), the two gears (25) being connected in transmission via a toothed chain (30), a motor (26) for driving is mounted on the base (15), a gear (27) having a smaller diameter than the gear (25) is fixedly mounted on the output shaft of the motor (26), and the gear (27) is meshed with one of the gears (25).

9. A PE permeation pipe diameter expansion device according to claim 8, characterized in that: Two different three-hole clamps (28) are respectively installed on the surface of the hydraulic cylinder (10) and the mounting rod (2), the center points of the side holes of the two three-hole clamps (28) are located on the same horizontal line, and the side holes on the same side of the two three-hole clamps (28) are filled with connecting rods (29) for rigid auxiliary installation.

10. A PE permeation pipe diameter expansion device according to claim 9, characterized in that: The diameter of the contact position between the connecting rod (29) and the three-hole clamp (28) is exactly matched with the inner diameter of the side hole of the three-hole clamp (28), and the diameter of the non-contact position between the connecting rod (29) and the three-hole clamp (28) is larger than the inner diameter of the side hole of the three-hole clamp (28).

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