A PE permeation pipe diameter expansion device

Abstract

The present invention relates to the technical field of diameter expansion equipment, and specifically proposes a PE permeation pipe diameter expansion device, comprising two symmetrically arranged frustum-shaped diameter expansion cones with a central portion passing therethrough and a round rod-shaped mounting rod for supporting the two diameter expansion cones, wherein the diameter expansion cones can be sleeved on the surface of the mounting rod for movement, and the small end of the diameter expansion cone is provided with an expansion tube assembly for diameter expansion; the expansion tube assembly comprises a plurality of inner layer extrusion assemblies and an outer layer extrusion assembly; the present invention increases, decreases or replaces an extrusion plate when expanding the diameters of different PE permeation pipes, and since all the inner layer extrusion assemblies are composed of a restraining ring and a plurality of extrusion plates, the operation is very convenient, and the movement of the limit plate can be driven by rotating the internal threaded sleeve, 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 diameter expansion length, and the overall structure is relatively simple and the operation is also very convenient.

Description

Technical Field

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

[0002] When producing PE infiltration pipes, some companies will clean, crush, and granulate the recycled waste PE plastic products to make recycled PE granules 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 usage requirements. Therefore, the problem will be solved by replacing or adding larger diameter PE infiltration pipes. The staff usually expand the end of the original PE infiltration pipe and install the larger diameter PE infiltration pipe through the pipe joint. However, the current pipe 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 expansion length usually needs to be increased in order to ensure the stability and sealing of the connection, enable smooth transition of the fluid at the pipe joint, reduce resistance and eddy currents, and ensure that the pipe material can deform evenly during the expansion process to achieve the expected expansion effect. Therefore, traditional pipe expanders are limited to 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 for solving the problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a PE permeation pipe expansion device, comprising two symmetrically arranged frustum-shaped expansion cones with a central portion passing through 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 multiple fan-shaped extrusion plates 2 with fan-shaped baffles on one side and multiple 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 multiple extrusion plates 2 and expansion plates are respectively formed into a circular shape through 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 with a diameter smaller than the innermost inner extrusion assembly, and the surface of the mounting rod is provided with two unconnected thread grooves. 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. 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. The surface of the mounting rod is equipped with no less than one double-headed hydraulic rod through a connecting pipe. The two ends of the double-headed hydraulic rod are fixedly arranged at the large end of the expansion cone. The mounting rod contains at least two channels for circulating liquid. 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 expanding cone is slidably sleeved on the surface of the internal threaded sleeve, and its small end is against the inner wall of the innermost inner extrusion component. The surface of the expanding cone is provided with a plurality of cross-shaped grooves in an annular array. A slider with rotating shafts on both sides is fixedly provided on one side of each extrusion plate of the innermost inner extrusion component. The slider is inserted into the inside of the groove and is easy to move.

[0009] Preferably, the liquid circulation pipe port of the hydraulic cylinder is connected to the liquid pipe in the mounting rod through a flexible pipe. The hydraulic cylinder is mounted on a base, and the base is always placed on the outside of the PE penetration 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 penetration pipe, and a roller is installed at its bottom. A fixed rod for positioning is set at its top, and the top of the fixed rod moves radially along the mounting rod.

[0010] Preferably, the liquid circulation 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 infiltration pipe that needs to be expanded, and both ends of the mounting rod are equipped with support rods with fan-shaped tops and adjustable heights, and a support plate for supporting the mounting rod is provided on the top of the support rod, and the support plate is suspended above the support rod by a fixing rod and a spring, one of the support rods is mounted on the base, and the other support rod is placed inside the PE infiltration pipe, and a roller is installed at the bottom thereof, and a fixing rod for positioning is provided on the top thereof, and the top of the fixing rod moves radially 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 making the hydraulic cylinder and the mounting rod rise and fall simultaneously.

[0012] Preferably, the driving assembly includes two gear ones 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 engaged 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 center points 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 adapted to 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 diameter expansion device. When expanding different PE permeation pipes, the extrusion plate 1 is added, reduced or replaced. Since all the inner layer extrusion components are composed of a restraining ring and multiple extrusion plates 1, 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 influence of gravity of the hydraulic cylinder and ensure the stability of the connection of the rigid pipe. 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 from the detailed description of non-limiting embodiments made with reference to the following drawings, in which like reference numerals indicate like parts throughout the drawings, which are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

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

[0020] Figure 2 This 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 schematic diagram of the three-dimensional structure 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 structural diagram of the support rod position part of Example 2.

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

[0027] Figure 9 This is a schematic diagram of the installation structure of the gears and tooth chain inside the base.

[0028] Figure 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. Constraint 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. Fixed 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

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

[0032] like Figure 4As shown, a PE permeation pipe expansion device includes two symmetrically arranged frustum-shaped expansion cones 1 with a central portion passing through 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 relative 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 into the interior of the expansion tube assembly, the expansion purpose 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, the staff needs to first determine the inner diameter of the PE permeation tube, and then select the number of layers of inner layer extrusion assemblies that are 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, the surface of each extrusion plate 3 has a concave groove, 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, so as to ensure that during the diameter 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 outer ring extrusion plate 3 are located on the inner side of the baffles on both sides of the inner ring extrusion plate 3, so as to ensure 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 will be more convenient to add, reduce or replace the extrusion plate 3.

[0035] like Figure 4 As shown, the outer extrusion assembly includes multiple fan-shaped extrusion plates 2 5 with fan-shaped baffles on one side and multiple fan-shaped expansion plates 6 without baffles on both sides. Similarly, the baffles of the extrusion plate 2 5 also rest 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 baffles is close to the expansion cone 1. Multiple extrusion plates 2 5 and expansion plates 6 are respectively formed into a circular ring shape through two groups of restraint rings 4. Similarly, the surfaces of the extrusion plate 2 5 and the expansion plate 6 also have grooves for installing the restraint 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 rests on the inner wall of the PE permeation tube, and one side of the expansion plate 6 rests on 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 component for limiting the position of the expansion tube component, 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 limiting plate 7 having a diameter smaller than that of the innermost layer extrusion assembly, such as Figure 4-5 The inner threaded sleeve 8 and the limit plate 7 are an integrally formed structure, and the outer diameter of the limit plate 7 is the same as the outer diameter of the inner layer extrusion component on the inner side. The inner threaded sleeve 8 is sleeved on the threaded groove position of the mounting rod 2, so as to ensure that the limit plate 7 can be driven to move when the inner threaded sleeve 8 is rotated, and no additional locking structure is required to ensure that the limit plate 7 itself will not move when subjected to horizontal force. By changing the distance between the two limit plates 7, the expansion length range of the entire device can be changed. The structure and operation are very simple and convenient. The side of the limit plate 7 close to the expansion tube component is equipped with a plurality of evenly laid balls 9, which can be rotated 360°, so as to ensure that when the extrusion plate 3 reaches the limit plate 7, it can smoothly move away from the center position 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 liquid 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 at the large end of the expanding cone 1. When pushing the expanding cone 1 to move, it is sufficient to ensure that the expanding 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 expanding cones 1 away from the double-headed hydraulic rod 11, and when the pressure is reduced, it means pulling the expanding cone 1 close to the double-headed hydraulic rod 11.

[0039] like Figure 4-5 As shown, the expanding 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 expanding cone 1 is provided with a plurality of cross-shaped grooves 12 in an annular array. In the present application, the number of grooves 12 is set at 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 against the limit plate 7. When the expanding 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, ensuring that more effort can be saved during the expansion process.

[0040] In this 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 assembled on a base 15, which 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 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 assembled 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 equipment to the inside of the PE penetration pipe. A fixing rod 19 for positioning is set on its top, and the top of the fixing rod 19 moves radially through the mounting rod 2 to prevent the mounting rod 2 from falling off 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. The pressure is transmitted through the extrusion plate 1 3 and the extrusion plate 2 5, so that the expansion plate 6 moves, 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 on the outside of the PE penetration pipe that needs to be expanded. The bottom of the hydraulic cylinder 10 is equipped with multiple 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 movement space. The two ends of the mounting rod 2 are equipped with a support rod 17 with a fan-shaped top and adjustable height. 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 by 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 penetration pipe, and the bottom of the support rod 17 is equipped with a roller 18 to facilitate moving the entire equipment to a suitable position. A fixing rod 19 for positioning is set on the top, and the top of the fixing rod 19 is radially movable through 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. The function of stopping and locking is also guaranteed. The height of the PE permeation pipe in different positions can also be adjusted. 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 Figure 9 As shown, the drive assembly includes two gears 1 25 respectively fixedly assembled on the lower ends of the rotating tubes 23, and the two gears 1 25 are connected by a toothed chain 30. A motor 26 for driving is assembled on the base 15, and a gear 2 27 with a diameter smaller than that of the gear 1 25 is fixedly assembled on the output shaft of the motor 26. The gear 2 27 is engaged with one of the gears 1 25. The bottom of the base 15 is configured to be openable and closable, and the motor 26 drives the gear 2 27 to rotate. The transmission effect of the two gears 1 25 and the toothed chain 30 is used to rotate the two rotating tubes 23, thereby realizing the lifting and lowering of the threaded rod 24. Since the hydraulic cylinder 10 and the mounting rod 2 are rigidly connected, 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 Figure 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 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, 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 as 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 diameter expansion, 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, reduce the influence of gravity on 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 in usage between the first embodiment and the second embodiment, and the method of use needs to be selected according to the required hydraulic pressure.

[0052] The present invention provides a PE permeation tube expansion device. The device determines the required expansion length and the diameter of the PE permeation tube, replaces different inner and outer extrusion assemblies, and utilizes the transmission effect of the motor 26, two gears 1 25, gear 2 27 and toothed chain 30 to make the two threaded rods 24 rise to the point where the installation rod 2 and the center of the PE permeation tube are basically on the same horizontal line. At the same time, the support rods 17 installed on the inner side of the PE permeation tube are adjusted to the same height and moved to the operating position. The two internal threaded sleeves 8 are rotated respectively to drive the movement of the limit plate 7, and the two expansion tube assemblies are moved against 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 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. 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 influence of gravity on the hydraulic cylinder 10, thereby achieving diameter expansion.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0054] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on 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 that do not depart 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 tube diameter expansion device, characterized in that: The invention comprises two symmetrically arranged truncated cone-shaped expansion cones (1) with a central portion extending 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. The small end of the expansion cone (1) is provided with an expansion tube assembly for expansion. The tube expansion assembly includes a plurality of inner layer extrusion assemblies and an outer layer extrusion assembly; The inner layer extrusion assembly includes 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 a binding ring (4) with elasticity. 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 includes 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 expansion plates (6) are respectively formed into a circular ring shape through two groups of restraining rings (4). One side of the expansion plate (6) is against the baffle of the extrusion plate (5). The number of the expansion plates (6) is greater than the number of the extrusion plate (5). The surface of the mounting rod (2) is provided with a positioning assembly for limiting the position of the expansion tube assembly; The positioning assembly includes an annular limiting plate (7) having a diameter smaller than that of the innermost inner layer 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 equipped with an internal thread sleeve (8) whose inner side is 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 equipped with a plurality of evenly laid balls (9).

2. A PE permeation tube diameter expansion device according to claim 1, 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 implement pressure increase and pressure reduction.

3. A PE permeation tube diameter expansion device according to claim 2, 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.

4. A PE permeation tube diameter expansion device according to claim 2, 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 assembled on a base (15). The base (15) is always placed on the outside of 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 assembled on the base (15), and the other support rod (17) is placed inside the PE permeation pipe. The bottom of the support rod is equipped with a roller (18). A fixed rod (19) for positioning is arranged on the top of the fixed rod (19). The top of the fixed rod (19) moves radially through the installation rod (2).

5. A PE permeation tube diameter expansion device according to claim 2, 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). The bottom of the hydraulic cylinder (10) is equipped with a plurality of spring seats (21) for shock absorption and is mounted 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. Both 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 rod for supporting the mounting rod. (2) of the support plate (22), the support plate (22) is suspended above the support rod (17) through a fixing rod (19) and a spring (16), 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 assembled at the bottom thereof, and a fixing rod (19) for positioning is arranged at the top thereof, the top of the fixing rod (19) is movable and penetrates radially along the mounting rod (2), and the mounting rod (2) has a certain amount of moving space margin.

6. A PE permeation tube diameter expansion device according to claim 5, characterized in that: The support frame assembly includes a rotating tube (23) which is assembled on a base (15) through a bearing and has a threaded interior. A threaded rod (24) with a mounting plate on the top is adapted to be mounted in 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 in the base (15) for simultaneously raising and lowering the hydraulic cylinder (10) and the mounting rod (2).

7. A PE permeation tube diameter expansion device according to claim 6, 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 diameter smaller than that of 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).

8. The PE permeation tube diameter expansion device according to claim 7, characterized in that: Two different three-hole clamps (28) are respectively installed on the surfaces 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.

9. A PE permeation tube diameter expansion device according to claim 8, characterized in that: The diameter of the contact position between the connecting rod (29) and the three-hole hoop (28) is just adapted to the inner diameter of the side hole of the three-hole hoop (28), and the diameter of the non-contact position between the connecting rod (29) and the three-hole hoop (28) is larger than the inner diameter of the side hole of the three-hole hoop (28).

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