Non-hot-melt reducer butt joint device based on HPVC power pipe laying

Abstract

The present invention discloses a non-hot-melt type diameter-reducing butt joint device based on the laying of HPVC power pipes, which relates to the technical field of power pipe butt jointing. For the butt jointing process during the operation of HPVC power pipes, a non-hot-melt type butt jointing process is adopted. The overall process is specifically based on a cutting process. The inner circle and outer circle cutting processes are respectively performed on the two ends of the two power pipes so that the two can be aligned with the same diameter. The operation process is relatively simple. There is a significant difference from the conventional hot-melt method in that: there is no high temperature change in the overall process. Based on the above, it is supplemented that: a hot air system is added during the butt jointing process. The hot air system does not have a melting effect on the pipe, but only has a softening effect on the pipe. Specifically, a plurality of outer circle clamps are used to ensure the stability of the butt joint position during the overall butt jointing process. Since there is no melting process, problems such as incomplete welding and shrinkage holes that affect the connection strength are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power pipe butt jointing, and in particular to a non-hot-melt type diameter-reducing butt jointing device based on the laying of HPVC electric power pipes. Background Art

[0002] During the construction process of HPVC power pipes, it is necessary to connect several power pipes according to the laying path. The conventional connection method is mainly based on welding. You can refer to the technical content of publication numbers CN117565412A and CN113910036A as examples. Its essence is to use heat energy to melt one end of the power pipe to expand its diameter and complete the connection.

[0003] The hot-melt process has higher requirements for operation. The first is the temperature requirement. If the temperature is too high, the power pipe will be too softened and over-melting will occur. If the temperature is insufficient, hot-melting will be difficult or false melting will occur. However, the key is: if the pipe and the pipe fitting are not kept in the same plane during welding during the overall operation, "skewed welding" phenomena such as incomplete welding and insufficient fusion circle will easily occur, reducing the connection strength. The subsequent connection process is mainly formed into one piece through the cooling process. However, if the clamp is removed too early or the cooling is uneven during the cooling stage, the fusion surface may be affected by tensile stress and produce tiny shrinkage holes or loose entanglement, resulting in tiny gaps between the power pipes after hot-melt. The present invention proposes a solution to this problem. Summary of the Invention

[0004] The present invention aims to provide a non-hot-melt reducer butt-jointing device for HPVC power pipe laying. The hot-melt butt-jointing process of HPVC power pipes is complex due to the high operational difficulty of the entire hot-melt process. The first is temperature control, and temperature differences directly affect the overall hot-melt quality. However, the key issue is that quality issues such as incomplete welding and shrinkage holes that affect the connection strength may also occur during the operation.

[0005] The object of the present invention can be achieved by the following technical solution: a non-hot-melt reducer butt joint device based on HPVC power pipe laying includes a workbench, an X-direction slide structure and a Y-direction slide are respectively provided on the workbench along the X direction and the Y direction, the Y-direction slide is respectively provided with a cutting assembly and a butt joint assembly along its length direction, and a Y-direction drive structure is installed on the Y-direction slide;

[0006] The cutting assembly is used to perform outer circle cutting and inner circle cutting on the HPVC power pipe respectively and obtain two pre-processed parts, so the docking assembly is used to dock the pre-processed parts and perform outer circle loading and hot air assistance on the pre-processed parts during the docking action.

[0007] It is further configured as follows: the cutting assembly includes an intermediate mounting table, a left outer ring sleeve, a right outer ring sleeve, an inner push column and an action drive structure installed on the surface of the Y-axis slide; the inner push column is rotationally connected to the intermediate mounting table through the action drive structure; the left outer ring sleeve and the right outer ring sleeve are respectively located on both sides of the intermediate mounting table, and the left outer ring sleeve and the right outer ring sleeve are fixedly connected and rotationally connected to the intermediate mounting table respectively.

[0008] It is further configured as follows: the right outer ring sleeve is fixedly connected to one end of the inner top column, and cutting blades are provided on the outer wall position of the inner top column corresponding to one side of the left outer ring sleeve and the inner wall position of the right outer ring sleeve.

[0009] It is further configured as follows: the X-direction slide structure is symmetrically arranged along the Y-direction slide, and a directional clamping platform corresponding to the HPVC power pipe is provided on the X-direction slide structure.

[0010] It is further configured as follows: the docking assembly includes a placement table, a clamping arc table, an air pump assembly, an outer circular clamp and a flip structure installed on the Y-axis slide; the clamping arc table is hinged to one end of the placement table through the flip structure; the outer circular clamp is arranged in a circular array along the center point of the placement table and the clamping arc table; and small air sleeves corresponding to the outer circular clamps are installed on the outside of the placement table and the clamping arc table.

[0011] It is further configured as follows: a connecting rod extending to the outer circular clamp is slidably installed inside the small air sleeve, the end of the connecting rod is configured as a sphere, and a spring is provided at one end position of the connecting rod corresponding to the inside of the small air sleeve, and the placement table and the inside of the small air sleeve on the clamping arc table are connected by a hose.

[0012] It is further configured as follows: a clearance ring groove corresponding to the HPVC power pipe is opened inside the placement table and the clamping arc table, and sealing members are provided between the two ends of the clearance ring groove and the outer wall of the HPVC power pipe, and the outer diameter of the middle section of the outer circular clamping piece corresponding to the clearance ring groove is greater than the diameter of the outer wall of the HPVC power pipe.

[0013] It is further configured as follows: a slot corresponding to the length of the HPVC power pipe is opened on the inner wall of the outer circular clip, and the output section of the air pump component is connected to one or more small air sleeves and the inside of the yield ring groove.

[0014] The present invention has the following beneficial effects:

[0015] 1. The overall solution is designed for the butt-jointing process of HPVC power pipes. It differs directly from conventional methods in that, rather than using high-temperature hot melting, two coaxially rotating inner jacks simultaneously cut the inner and outer circumferences of the two HPVC power pipes, creating an outer-circle-within-inner-circle butt-joint. This significantly differs from conventional hot melting methods in that the cutting operation is relatively simple and effective, avoiding issues such as over-melting or unstable hot melting of the HPVC power pipes caused by high temperatures, thereby preventing quality issues such as incomplete welding and shrinkage holes that affect connection strength.

[0016] 2. The key to the overall solution lies in the docking process. The docking process is based on the two pre-processed parts obtained in the cutting process. It adopts the method of directional extrusion and adds the extrusion process of the outer circle clamp on the inner circle part during the docking process. Its purpose is to maintain the docking direction and avoid the problem of misalignment during the docking process. In addition, a hot air auxiliary method is further added. Its essence is that when the docking is carried out simultaneously, the inner or outer circle part will be assisted to soften, but no direct melting process will be carried out, to ensure that the inner circle part of the pre-processed part is inserted into the outer circle part in a relative position. The overall operation process is very simple, and there will be no abnormal problems caused by temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of the non-hot-melt reducer butt joint device for HPVC power pipe laying proposed by the present invention;

[0019] Figure 2 This is a schematic structural diagram of the cutting assembly in the non-hot-melt reducer butt joint device for HPVC power pipe laying proposed by the present invention;

[0020] Figure 3 The non-hot-melt variable diameter butt joint device proposed by the present invention for laying HPVC power pipes Figure 2 sectional view of

[0021] Figure 4 This is a schematic diagram of the butt jointing of power pipes in the non-hot-melt reducer butt jointing device for laying HPVC power pipes proposed by the present invention;

[0022] Figure 5This is a structural schematic diagram of the docking assembly in the non-hot-melt variable-diameter docking device for laying HPVC power pipes proposed by the present invention;

[0023] Figure 6 The non-hot-melt variable diameter butt joint device proposed by the present invention for laying HPVC power pipes Figure 5 Cross-sectional view corresponding to the Y direction;

[0024] Figure 7 This is a schematic diagram of the structure of the outer circular clamp in the non-hot-melt reducer butt joint device for laying HPVC power pipes proposed by the present invention;

[0025] Figure 8 The non-hot-melt variable diameter butt joint device proposed by the present invention for laying HPVC power pipes Figure 5 Partial cutaway view.

[0026] In the figure: 1. workbench; 2. inner push column; 3. left outer ring sleeve; 4. Y-axis drive structure; 5. Y-axis slide; 6. action drive structure; 7. right outer ring sleeve; 8. placement table; 9. clamping arc table; 901, give way ring groove; 10. directional clamping table; 11. intermediate mounting table; 12. flip structure; 13. air pump assembly; 14. X-axis slide structure; 15. small air sleeve; 16. outer circle clamp; 17. connecting rod; 18. spring. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all 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.

[0028] Example 1: Regarding the hot-melt butt welding process of HPVC power pipes, the overall hot-melt process is difficult to operate. The first is temperature control. Temperature differences directly affect the overall hot-melt quality. However, the key is that quality problems such as incomplete welding and shrinkage holes that affect the connection strength may occur during the operation. The following technical content is proposed:

[0029] Reference Figures 1 to 8 The non-hot-melt reducer butt joint device for HPVC power pipe laying in this embodiment includes a workbench 1, on which an X-direction slide structure 14 and a Y-direction slide 5 are respectively provided along the X direction and the Y direction. The Y-direction slide 5 is respectively provided with a cutting assembly and a butt joint assembly along its length direction, and a Y-direction drive structure 4 is installed on the Y-direction slide 5;

[0030] The cutting assembly is used to perform outer circle cutting and inner circle cutting on the HPVC power pipe respectively and obtain two pre-processed parts, so the docking assembly is used to perform docking on the pre-processed parts, and perform outer circle loading and hot air assistance on the pre-processed parts during the docking action. The cutting assembly includes an intermediate mounting platform 11, a left outer ring sleeve 3, a right outer ring sleeve 7, an inner top column 2 and an action driving structure 6 installed on the surface of the Y-axis slide 5. The inner top column 2 is rotatably connected to the intermediate mounting platform 11 through the action driving structure. The left outer ring sleeve 3 and the right outer ring sleeve 7 are respectively located on both sides of the intermediate mounting platform 11, and the left outer ring sleeve 3, the right outer ring sleeve 7 and the intermediate mounting platform 11 are respectively fixedly connected and rotatably connected. The right outer ring sleeve 7 is fixedly connected to one end of the inner top column 2, and cutting blades are provided on the outer wall position of the inner top column 2 corresponding to the left outer ring sleeve 3 and the inner wall position of the right outer ring sleeve 7.

[0031] Basic Principle: First, let's briefly explain the hot-melt butt-jointing method for HPVC power pipes. Its essence is to first mill the ends of two HPVC power pipes flat, then heat the flattened HPVC ends to a high temperature to make them semi-melted. Finally, the semi-melted ends of the two HPVC power pipes are butt-jointed, and after cooling, the two HPVC power pipes become one piece.

[0032] However, the present invention is directly different from the conventional docking method in that: Figure 2 For example, first, the action driving structure 6 drives the right outer ring sleeve 7 to rotate in a directional and uniform manner. When the right outer ring sleeve 7 rotates, a cutting blade is installed on the inner wall of the right outer ring sleeve 7, and because the right outer ring sleeve 7 and the inner top column 2 are fixedly connected, and a cutting blade is also installed on the outer wall of one end of the inner top column 2, the diameter range of the inner top column 2 and the right outer ring sleeve 7 is limited. Specifically, according to the outer diameter of the HPVC power pipe, the cutting blade in the right outer ring sleeve 7 is ensured to cut the outer wall of the HPVC power pipe to form an outer circle, and the cutting blade in the inner top column 2 is to cut the inner wall of the HPVC power pipe to form an inner circle, and the left outer ring sleeve 3 is to cut the HPVC power pipe. The outer supporting structure in the cutting action of the inner wall of the PVC power pipe, and the other end position of the inner top column 2 is the inner supporting structure in the cutting action of the outer wall of the HPVC power pipe. For this purpose, it is necessary to further restrict the installation method of the inner top column 2, the right outer ring sleeve 7, and the left outer ring sleeve 7. Specifically, the right outer ring sleeve 7 is directly connected to the inner top column 2, and the right outer ring sleeve 7 is driven by the action driving structure 6. The essence of the action driving structure 6 is a gear meshing transmission structure, and the left outer ring sleeve 3 and the intermediate mounting platform 11 can be kept in rotation or fixed. The key is to ensure that the left outer ring sleeve 7 and the intermediate mounting platform 11 maintain rotation, so as to refer to Figure 4After cutting, the two HPVC power pipes form inner and outer circle parts. Assuming that the thickness of the HPVC power pipe is 5mm, the inner circle part can be used to represent the part cut from the inner wall of the HPVC power pipe with a thickness of 2.0 to 2.8mm, and the outer circle part can be used to represent the part cut from the outer wall of the HPVC power pipe with a thickness of 2.0 to 2.8mm. In this way, the outer circle part can be inserted into the inner circle part to form a whole. Finally, secondary fixation and sealing can be performed by structures such as tape.

[0033] Example 2: The switching process between the cutting action and the docking action is described:

[0034] The X-direction slide structure 14 is symmetrically arranged along the Y-direction slide table 5 , and a directional clamping platform 10 corresponding to the HPVC power pipe is arranged on the X-direction slide structure 14 .

[0035] Program Description: Specifically Figure 1 The X-axis slide structure 14 is essentially a push cylinder structure, and a directional clamping platform 10 is added to the push cylinder structure. The purpose of the directional clamping platform 10 is mainly to initially position the HPVC power pipe in the cutting or docking action, and then provide an X-axis power drive mode for the cutting and docking actions. For example, during the cutting action, the X-axis slide structure 14 drives two HPVC power pipes to move simultaneously toward the middle mounting platform 11 to perform a synchronous cutting process.

[0036] What is relatively simple is that after the cutting action is completed, the two HPVC power pipes move in opposite directions and reset. During this process, the Y-direction drive structure 4 is used to drive the entire Y-direction slide 5 to move along the Y direction. Simply put, the cutting component leaves the position corresponding to the HPVC power pipe, and conversely, the docking component 8 moves to the position corresponding to the HPVC power pipe. Before the docking action, the flip structure 12 is used to open the clamping arc table 9, and the two HPVC power pipes after cutting are placed on the placement table 8. The HPVC power pipes are then fixed again by the clamping arc table 9 to ensure stable position in the subsequent docking action.

[0037] Example 3: The docking action in Example 1 is explained as follows in conjunction with Example 2:

[0038] The docking assembly includes a placement table 8, a clamping arc table 9, an air pump assembly 13, an outer circular clip 16 and a flip structure 12 installed on the Y-axis slide 5. The clamping arc table 9 is hinged to one end of the placement table 8 through the flip structure 12. The outer circular clip 16 is arranged in a circular array along the center point of the placement table 8 and the clamping arc table 9, and the placement table 8 and the clamping arc table 9 are both installed with small air sleeves 15 corresponding to the outer circular clip 16 on the outside. A connecting rod 17 extending to the outer circular clip 16 is slidably installed inside the small air sleeve 15. The end of the connecting rod 17 is set as a sphere, and a spring 18 is provided at one end of the connecting rod 17 corresponding to the inside of the small air sleeve 15. The interiors of the small air sleeves 15 on the placement platform 8 and the clamping arc platform 9 are connected by a hose. The placement platform 8 and the clamping arc platform 9 are provided with a clearance ring groove 901 corresponding to the HPVC power pipe. Seals are provided between the two ends of the clearance ring groove 901 and the outer wall of the HPVC power pipe. The outer diameter of the middle section of the clearance ring groove 901 corresponding to the outer circular clamping piece 16 is greater than the outer wall diameter of the HPVC power pipe. A groove corresponding to the length of the HPVC power pipe is provided on the inner wall of the outer circular clamping piece 16. The output section of the air pump assembly 13 is connected to one or more small air sleeves 15 and the interior of the clearance ring groove 901.

[0039] Solution description: The essence of the docking action is to insert the outer circle part into the inner circle part, as shown in Example 1 and Figure 3 To illustrate, the thickness of the cutting blade on the inner top column 2 is exactly equal to the thickness of the cutting blade on the right outer ring 7, but unexpected interference may occur during the insertion process. In this regard, the present invention improves the docking process:

[0040] S1: Reference Figure 6 To illustrate, at the moment when the two cut HPVC power pipes come into contact in the yield ring groove 901, the air pump assembly 13 first supplies a constant amount of air to each small air sleeve 15 to ensure that each outer circular clip 16 simultaneously approaches the outer wall position of the outer circular portion. This is to ensure that the HPVC power pipe in the outer circular portion is exactly aligned with the inner circular portion. Moreover, because each outer circular clip 16 is arranged in a circular array along the center point of the HPVC power pipe, once each outer circular clip 16 fully contacts the outer wall position of the outer circular portion, it will not move in the direction close to the center point of the HPVC power pipe. This is to prevent the outer circular clip 16 from causing deformation of the outer circular portion. Finally, the insertion-type docking process is carried out by the X-axis slide structure 14.

[0041] S2: As shown in S1, although the HPVC power pipe itself has a certain hardness, if the local position of the outer circle part and the inner circle part interfere with each other, it will also affect the insertion docking process. For this, the air pump assembly 13 is further utilized. The air pump assembly 13 essentially injects gas into each small air sleeve 15 to generate power for each connecting rod 17 and the outer circle clamp 16, and can also inject gas into the inner part of the yield ring groove 901. However, for the environment inside the overall yield ring groove 901, a heating assembly is added on the basis of the air pump assembly 13. The heating assembly does not directly heat the HPVC power pipe, but rather heats the gas injected into the yield ring groove 901. 1 is heated, and the heated gas is completely retained in the yield ring groove 901. Its purpose is to preliminarily soften the outer and inner parts in the docking process. The slots opened on each outer clamping piece 16 serve as a guide channel for the hot air flow, playing a "gas lubrication" role between the outer clamping piece 16 and the outer wall of the inner part. Finally, after one end of the inner part contacts the outer clamping piece 16, the air pump assembly 13 and the spring 18 drive the outer clamping piece 16 to reset and detach from the outer wall of the outer part. Finally, the outer part is fully inserted into the inner part, and the clamping arc platform 9 is opened to remove the docked HPVC power pipe.

[0042] The inner and outer circular parts can also be fixed and sealed by structures such as tape and rings, but this part is not relevant to the present invention.

[0043] In summary, for the docking process of HPVC power pipes, a non-hot-melt docking process is adopted. The overall process is based on the cutting process. The inner and outer circles of the two ends of the two power pipes are cut respectively so that the two can be aligned with the same diameter. The operation process is relatively simple. The obvious difference from the conventional hot-melt method is that there is no high-temperature change in the overall process. Based on the above, it is supplemented that a hot air system is added during the docking process. The hot air system does not melt the pipe, but only softens the pipe. Specifically, multiple outer circle clamps are used to ensure the stability of the docking position during the overall docking process. Since there is no melting process, problems such as incomplete welding and shrinkage holes that affect the connection strength are avoided.

[0044] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they shall fall within the scope of protection of the present invention.

[0045] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A non-hot-melt reducer butt joint device for laying HPVC power pipes, including a workbench, characterized in that: The workbench is provided with an X-direction slide structure and a Y-direction slide along the X direction and the Y direction respectively, the Y-direction slide is provided with a cutting assembly and a docking assembly along its length direction respectively, and a Y-direction drive structure is installed on the Y-direction slide; The cutting assembly is used to perform outer circle cutting and inner circle cutting on the HPVC power pipe to obtain two pre-processed parts, so the docking assembly is used to dock the pre-processed parts and perform two actions of outer circle loading and hot air assistance on the pre-processed parts during the docking action; The docking assembly includes a placement table, a clamping arc table, an air pump assembly, an outer circular clamp and a flip structure installed on the Y-axis slide. Small air sleeves corresponding to the outer circular clamp are installed on the outside of the placement table and the clamping arc table. A connecting rod extending to the outer circular clamp is slidably installed inside the small air sleeve. The end of the connecting rod is set as a sphere. The placement table and the clamping arc table are provided with a clearance ring groove corresponding to the HPVC power pipe. The two ends of the clearance ring groove are provided with sealing members between the outer wall of the HPVC power pipe, and the outer diameter of the middle section of the clearance ring groove corresponding to the outer circular clamp is greater than the outer wall diameter of the HPVC power pipe. The inner wall of the outer circular clamp is provided with a slot corresponding to the length of the HPVC power pipe. The output section of the air pump assembly is connected to one or more small air sleeves and the inside of the clearance ring groove. The outer circular clamps are arranged in a circular array along the center points of the placement table and the clamping arc table. The air pump assembly inputs a constant amount of gas into the small air sleeve to generate power for the connecting rod and the outer circular clamp. A heating assembly for heating the gas is added on the basis of the air pump assembly. The slots in the outer circular clamps are used as guide channels for the hot air flow. The hot air flow completes the gas lubrication action between the outer circular clamps and the outer wall of the inner circular part, so that the heated gas is completely retained in the yield ring groove for preliminary softening of the outer circular part and the inner circular part during the docking process. After one end position of the inner circular part contacts the outer circular clamp, the outer circular clamp is reset and separated from the outer wall position of the outer circular part. Finally, the outer circular part is completely inserted into the inner circular part to complete the HPVC power pipe docking process.

2. The non-hot-melt reducer butt joint device for laying HPVC power pipes according to claim 1 is characterized in that: The cutting assembly includes an intermediate mounting table, a left outer ring sleeve, a right outer ring sleeve, an inner push column and an action drive structure installed on the surface of the Y-axis slide. The inner push column is rotatably connected to the intermediate mounting table through the action drive structure. The left outer ring sleeve and the right outer ring sleeve are respectively located on both sides of the intermediate mounting table, and the left outer ring sleeve and the right outer ring sleeve are respectively fixedly connected and rotatably connected to the intermediate mounting table.

3. The non-hot-melt reducer butt joint device for laying HPVC power pipes according to claim 2 is characterized in that: The right outer ring sleeve is fixedly connected to one end of the inner top column, and cutting blades are provided on the outer wall position of the inner top column corresponding to one side of the left outer ring sleeve and the inner wall position of the right outer ring sleeve.

4. The non-hot-melt reducer butt joint device for laying HPVC power pipes according to claim 1 is characterized in that: The X-direction slide structure is symmetrically arranged along the Y-direction slide, and a directional clamping platform corresponding to the HPVC power pipe is provided on the X-direction slide structure.

5. The non-hot-melt reducer butt joint device for laying HPVC power pipes according to claim 1 is characterized in that: The clamping arc platform is hinged to one end of the placement platform through a flip structure.

6. The non-hot-melt reducer butt joint device for laying HPVC power pipes according to claim 5 is characterized in that: A spring is provided on one end of the connecting rod corresponding to the interior of the small air sleeve, and the placement platform and the interior of the small air sleeve on the clamping arc platform are communicated with each other through a hose.

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