Pipe fitting welding seam cutting and plugging device

Abstract

The invention provides a pipe fitting weld joint cutting and plugging device which comprises a first driving mechanism, a cutting and plugging mechanism and a plug feeding mechanism, the cutting and plugging mechanism comprises a positioning and plugging unit and a cutting unit, the positioning and plugging unit is installed on the first driving mechanism, and the cutting unit is connected with the positioning and plugging unit; the positioning and plugging unit is arranged in the pipe fitting, the axis of the positioning and plugging unit coincides with the rotating axis of the cutting unit, the positioning and plugging unit is arranged to be capable of stretching into an inner hole of the pipe fitting so that the cutting unit can be positioned on the pipe fitting, the plug is installed in the pipe fitting, and the cutting unit is arranged to be capable of cutting a weld joint of the pipe fitting; the plug feeding mechanism is installed on the first driving mechanism or the cutting and plugging mechanism and is arranged to store plugs and convey the plugs to the cutting and plugging mechanism. Seamless connection of the cutting process and the plug mounting process is achieved, time loss and positioning errors in the split tool switching process are effectively avoided, and the overall working efficiency from welding seam cutting to plug mounting in the pipe fitting maintenance process is remarkably improved.

Description

Technical Field

[0001] This application belongs to the field of nuclear power plant maintenance technology, and more specifically, relates to a pipe fitting weld cutting and sealing device. Background Technology

[0002] As a key component of the steam generator in a nuclear power plant, the heat transfer tubes primarily function to achieve heat exchange. During nuclear power plant operation, the heat transfer tubes are subjected to high temperature and high pressure for extended periods, making them susceptible to damage. When a heat transfer tube is damaged, it must be welded shut using specialized plugs to prevent leakage and contamination of the secondary side. Due to the high radiation dose rate on the primary side of the steam generator and the confined working space, remote maintenance is typically employed. Operators, located outside the steam generator, use a manhole to send a transfer platform and specialized maintenance tools into the generator. They then remotely control the transfer platform to deliver the tools to the heat transfer tube requiring repair, where the tools are used to remotely cut and shape the tube end face and install the plug.

[0003] The existing tools for remote cutting and plugging of heat transfer tubes in steam generators are separate units, consisting of a cutting tool and a plugging tool. When performing remote cutting and plugging of heat transfer tubes, the conveyor platform must first carry the cutting tool to cut and shape the weld seam on the end face of the heat transfer tube. Then, the entire tool is removed, replaced with the plugging tool, and the conveyor platform carries the plugging tool back to the same location for plugging. This results in excessively long maintenance times for the heat transfer tubes, significantly impacting overall maintenance efficiency. Summary of the Invention The purpose of this application is to provide a pipe fitting weld cutting and sealing device to solve the technical problem in the prior art where the weld cutting tool and the plug installation tool are set up separately, which affects the efficiency of pipe fitting maintenance.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: A pipe fitting weld cutting and plugging device is provided, comprising a first driving mechanism, a cutting and plugging mechanism, and a plug feeding mechanism. The cutting and plugging mechanism includes a positioning and plugging unit and a cutting unit. The positioning and plugging unit is mounted on the first driving mechanism, and the cutting unit is connected to the positioning and plugging unit, with the axis of the positioning and plugging unit coinciding with the rotation axis of the cutting unit. The positioning and plugging unit is configured to extend into the inner hole of the pipe fitting to position the cutting unit on the pipe fitting and to install a plug in the pipe fitting. The cutting unit is configured to cut the weld of the pipe fitting. The plug feeding mechanism is mounted on the first driving mechanism or the cutting and plugging mechanism and is configured to store the plug and feed the plug to the cutting and plugging mechanism.

[0005] Furthermore, the positioning and sealing unit includes a mounting component, a positioning shaft, and multiple positioning blocks; the positioning shaft is connected to the cutting unit and is mounted on the mounting component; the multiple positioning blocks are disposed at the end of the positioning shaft away from the mounting component and distributed along the circumferential direction of the positioning shaft; the positioning blocks are configured to reciprocate radially along the positioning shaft; the cutting unit is sleeved on the positioning shaft and located between the mounting component and the positioning blocks.

[0006] Furthermore, the positioning shaft is provided with a guide hole extending along the axial direction and a plurality of hollowed-out portions corresponding to the positioning blocks, the hollowed-out portions communicating with the guide hole; the positioning blocks are movably disposed in the hollowed-out portions one by one, and the side of the positioning block facing the guide hole is an inclined surface; a push rod with a conical surface is provided in the guide hole, the conical surface being configured to cooperate with the inclined surface to drive the positioning block to reciprocate radially along the positioning shaft; The positioning and sealing unit also includes an elastic element, which is configured to constrain the plurality of positioning blocks onto the positioning shaft.

[0007] Furthermore, the cutting unit includes a cutting tool, a cutting disc, and a cutting drive assembly. The cutting disc is sleeved on the positioning shaft and connected to the cutting drive assembly. The cutting tool is detachably mounted on the cutting disc.

[0008] Furthermore, the cutting unit also includes an elastic cover mounted on the mounting member, the elastic cover being configured to cover the pipe and elastically deform along the axial direction; The mounting component has an absorption hole, which communicates with the cavity inside the elastic shield.

[0009] Furthermore, the plug feeding mechanism includes a plug feeding assembly and a feeding drive assembly. The feeding drive assembly is mounted on the first drive mechanism or the cutting and plugging mechanism. The plug feeding assembly is configured to store plugs and drive the plugs to move, and is connected to the feeding drive assembly. The feeding drive assembly is configured to drive the plug feeding assembly to move so as to fit the plug onto the positioning and plugging unit.

[0010] Furthermore, the plug feeding assembly includes a base plate, an outer cover, and a push plate; it is connected to the feeding drive assembly; the outer cover is mounted on the base plate, the inner wall of the outer cover is provided with a guide groove, the outer wall of the plug is provided with a guide protrusion, and the guide protrusion is slidably connected to the guide groove; the push plate is disposed above the base plate and slidably connected to the outer cover, the push plate is provided with multiple slots, the slots are used to place the plug, and the push plate is used to move the plug out to the outside of the outer cover.

[0011] Furthermore, the plug feeding assembly also includes an elastic pressure rod and a step distance sensor; the side wall of the outer cover is provided with a guide hole, the elastic pressure rod is movably disposed in the guide hole and abuts against the plug to prevent the plug from moving radially; the step distance sensor is disposed in the outer cover and is used to identify the pushing distance of the push plate.

[0012] Furthermore, the locking position is provided with a one-way lever. When the push plate moves to the outside of the outer cover, the one-way lever abuts against the plug to push the plug out of the outer cover; when the push plate moves to the inside of the outer cover, the one-way lever swings to separate the one-way lever from the plug.

[0013] Furthermore, the feeding drive assembly includes a connecting frame, a lifting component, and a translating component. The lifting component is mounted on the connecting frame and connected to the base plate. The lifting direction of the lifting component is parallel to the axial direction of the positioning and sealing unit. The translating component is mounted on the base plate and connected to the push plate. The translating component is used to drive the push plate to move along the X-axis direction to move the plug outside the outer cover.

[0014] Further, the first driving mechanism includes an X-axis moving component, a Y-axis moving component, a Z-axis moving component, and a mounting bracket; the Z-axis moving component is slidably connected to the cutting and sealing mechanism and is configured to push the cutting and sealing mechanism to move along the Z-axis direction; the Z-axis direction is parallel to the axial direction of the positioning and sealing unit; the X-axis moving component is slidably connected to the Z-axis moving component and is configured to push the Z-axis moving component to move along the X-axis direction; the X-axis moving component is mounted on the mounting bracket; the Y-axis moving component is slidably connected to the mounting bracket and is configured to push the mounting bracket to move along the Y-axis direction.

[0015] Furthermore, the pipe fitting weld cutting and sealing device also includes an image acquisition component. The mounting frame has a first surface, a second surface, and a third surface. The X-axis moving component is mounted on the first surface, the Y-axis moving component is mounted on the second surface, and the image acquisition component is mounted on the third surface.

[0016] The beneficial effects of the pipe fitting weld cutting and plugging device provided in this application are as follows: Compared with the prior art, this application, by setting up a first driving mechanism, a cutting and plugging mechanism, and a plug feeding mechanism, utilizes the first driving mechanism to achieve precise positioning and pushing of the positioning and plugging unit and the cutting unit. The axis of the positioning and plugging unit coincides with the rotation axis of the cutting unit, ensuring that while the positioning and plugging unit extends into the pipe fitting, the cutting unit can also accurately align with the weld position of the pipe fitting, guaranteeing the accuracy of the cutting operation. After the pipe fitting weld cutting is completed, there is no need to change tools. The plug can be directly fed to the positioning and plugging unit through the plug feeding mechanism, and then the positioning and plugging unit is pushed again by the first driving mechanism to install the plug. This achieves seamless connection between the cutting and plug installation processes, effectively avoiding time loss and positioning errors during the switching of separate tools, and significantly improving the overall work efficiency from weld cutting to plug installation in the pipe fitting repair process. It is especially suitable for pipe fitting repair scenarios that require continuous multi-process operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the pipe fitting weld cutting and sealing device provided in the embodiments of this application; Figure 2 A schematic diagram of the first drive mechanism in the pipe fitting weld cutting and sealing device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the assembly of the cutting and sealing mechanism and the plug feeding assembly in the pipe fitting weld cutting and sealing device provided in the embodiments of this application; Figure 4 for Figure 3 A sectional view; Figure 5 This is a schematic diagram of the positioning and sealing unit in the pipe fitting weld cutting and sealing device provided in the embodiments of this application; Figure 6 A schematic diagram of the plug feeding assembly in the pipe weld cutting and plugging device provided in this application embodiment. Figure 1 ; Figure 7 A schematic diagram of the plug feeding assembly in the pipe weld cutting and plugging device provided in this application embodiment. Figure 2 ; Figure 8 This is a schematic diagram of the end face weld and plug of the heat transfer tube of the steam generator in the embodiments of this application.

[0019] The following are the labeling elements in the figure: 10 - Pipe fitting; 11 - Weld; 20 - Tube sheet; 30 - Conveying platform; 100-Cutting and sealing mechanism; 101-Positioning and sealing unit; 110-Mounting component; 120-Positioning shaft; 121-Positioning block; 122-Elastic element; 123-Push rod; 103-Cutting unit; 130-Cutting tool; 131-Cutting disc; 140-Cutting drive assembly; 141-Transmission shaft; 142-First bevel gear; 143-Second bevel gear; 144-First drive motor; 150-Elastic protective cover; 161-Second drive motor; 162-Conversion box; 170-Limit switch; 200 - First drive mechanism; 210 - X-axis moving assembly; 220 - Y-axis moving assembly; 230 - Z-axis moving assembly; 240 - Mounting bracket; 250 - Monitoring camera; 300-Plug feeding assembly; 301-Plug; 310-Base plate; 320-Outer cover; 330-Push plate; 340-Elastic pressure rod; 350-Step distance sensor; 360-One-way lever; 370-Clamping position; 400 - Feeding drive assembly; 410 - Connecting frame; 420 - Lifting component; 430 - Translation component. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] Please refer to the following: Figure 1 and Figure 4 The pipe fitting weld cutting and sealing device provided in this application embodiment will now be described. This pipe fitting weld cutting and sealing device includes a first driving mechanism 200, a cutting and sealing mechanism 100, and a plug feeding mechanism. The cutting and sealing mechanism 100 includes a positioning and sealing unit 101 and a cutting unit 103. The positioning and sealing unit 101 is mounted on the first driving mechanism 200. The cutting unit 103 is connected to the positioning and sealing unit 101, and the axis of the positioning and sealing unit 101 coincides with the rotation axis of the cutting unit 103. The positioning and sealing unit 101 is configured to extend into the inner hole of the pipe fitting 10 to position the cutting unit 103 on the pipe fitting 10 and to install a plug 301 in the pipe fitting 10. The cutting unit 103 is configured to cut the weld of the pipe fitting 10. The plug feeding mechanism is mounted on the first driving mechanism 200 or the cutting and sealing mechanism 100 and is configured to store the plug 301 and supply the plug 301 to the cutting and sealing mechanism 100.

[0025] Compared with the prior art, the pipe fitting weld cutting and sealing device provided in this application provides a first driving mechanism 200, a cutting and sealing mechanism 100, and a plug feeding mechanism. The first driving mechanism 200 is used to achieve precise positioning and pushing of the positioning and sealing unit 101 and the cutting unit 103. The axis of the positioning and sealing unit 101 coincides with the rotation axis of the cutting unit 103, which can ensure that while the positioning and sealing unit 101 extends into the pipe fitting 10, the cutting unit 103 can also accurately align with the weld position of the pipe fitting 10, thus ensuring the accuracy of the cutting operation. After the weld seam of pipe fitting 10 is cut, there is no need to change tools. The plug 301 can be directly fed to the positioning and sealing unit 101 through the plug feeding mechanism. Then, the positioning and sealing unit 101 is pushed again by the first drive mechanism 200 to install the plug 301. This achieves a seamless connection between the cutting and plug 301 installation processes, effectively avoiding time loss and positioning errors during the switching of separate tools. It significantly improves the overall work efficiency from weld seam cutting to plug 301 installation during the repair of pipe fitting 10, and is especially suitable for repair scenarios of pipe fitting 10 that require multiple processes to be carried out continuously.

[0026] In one embodiment of this application, please refer to the following: Figure 3 and Figure 4The positioning and sealing unit 101 includes a mounting component 110, a positioning shaft 120, and a plurality of positioning blocks 121. The positioning shaft 120 is connected to the cutting unit 103 and is mounted on the mounting component 110. The plurality of positioning blocks 121 are disposed at the end of the positioning shaft 120 away from the mounting component 110 and are distributed along the circumferential direction of the positioning shaft 120. The positioning blocks 121 are configured to be able to reciprocate radially along the positioning shaft 120. The cutting unit 103 is sleeved on the positioning shaft 120 and is located between the mounting component 110 and the positioning blocks 121.

[0027] It is understood that the positioning block 121 has a first state and a second state; in the first state, the positioning block 121 is close to the axis of the positioning shaft 120, and the positioning block 121 can move freely as the positioning shaft 120 extends into the pipe fitting 10; in the second state, the positioning block 121 is away from the axis of the positioning shaft 120, and the positioning block 121 is in close contact with the inner wall of the pipe fitting 10 to fix the positioning shaft 120 inside the pipe fitting 10.

[0028] In this embodiment, the positioning and sealing unit 101 achieves rapid positioning and fixing of the pipe fitting 10 by switching between two states of the positioning block 121. Its structural design fully considers the balance between ease of operation and positioning stability. When the positioning shaft 120 needs to be inserted into the pipe fitting 10, the positioning block 121 is in the first state. At this time, the positioning block 121 is close to the axis, and the overall radial dimension is reduced, so it can be easily inserted into the pipe fitting 10 without being obstructed by the inner wall. After the positioning shaft 120 reaches the designated position, it switches to the second state. The positioning block 121 expands outward and fits tightly against the inner wall of the pipe fitting 10. By using the uniform distribution of multiple positioning blocks 121 along the circumferential direction, multiple points of support are formed for the inner wall of the pipe fitting 10, thereby firmly fixing the positioning shaft 120 on the central axis of the pipe fitting 10, ensuring that the positioning shaft 120 will not undergo radial displacement or axial movement in the subsequent cutting process.

[0029] In one embodiment of this application, please refer to the following: Figure 4 and Figure 5 The positioning shaft 120 is provided with a guide hole extending along the axial direction and a plurality of hollowed-out portions corresponding to the positioning blocks 121. The hollowed-out portions are connected to the guide hole. The positioning blocks 121 are movably disposed in the hollowed-out portions one by one. The side of the positioning block 121 facing the guide hole is an inclined surface. A push rod 123 with a conical surface is provided in the guide hole. The conical surface is configured to cooperate with the inclined surface to drive the positioning blocks 121 to reciprocate radially along the positioning shaft 120. The positioning and sealing unit 101 also includes an elastic element 122, which is configured to constrain the plurality of positioning blocks 121 on the positioning shaft 120.

[0030] In this embodiment, the hollowed-out portion provides space for the positioning block 121 to move smoothly in the radial direction, while reducing the overall weight of the positioning shaft 120 and improving the lightweight design. The guide hole serves as the movement channel for the push rod 123, and its axis coincides with the axis of the positioning shaft 120, ensuring that the push rod 123 always runs smoothly along the axial direction during reciprocating movement. When the push rod 123 moves towards the positioning block 121, its conical surface contacts and compresses the inclined surface of the positioning block 121. Through the guiding effect of the inclined surface, the axial thrust of the push rod 123 is converted into the radial expansion force of the positioning block 121, causing the positioning block 121 to switch from the first state to the second state. When the push rod 123 moves in the opposite direction, the compressive force of the conical surface on the positioning block 121 disappears, and the elastic element 122 sleeved on the multiple positioning blocks 121 uses its own elastic contraction force to pull the positioning blocks 121 toward the axial direction, so that the positioning blocks 121 quickly return to the first state. This mechanical linkage structure, achieved through the combination of inclined and conical surfaces, features rapid response and high transmission efficiency. Furthermore, it eliminates the need for an additional complex control system, allowing for the state switching of the positioning block 121 to be completed simply by operating the push rod 123. This effectively enhances the ease of operation and reliability of the positioning and sealing unit 101.

[0031] Specifically, the elastic element 122 can be a ring spring or a rubber ring. The ring spring has high elastic restoring force and fatigue resistance, maintaining a stable constraint force even after multiple extensions and retractions, making it suitable for high-frequency positioning operations. The rubber ring provides good cushioning and sealing, reducing vibration noise between the positioning block 121 and the positioning shaft 120, while also preventing wear caused by direct metal-to-metal contact, thus extending the service life of the positioning and sealing unit 101. In practical applications, the appropriate type of elastic element 122 can be selected based on the material of the pipe fitting 10, operating frequency, and other specific working conditions to achieve the best positioning effect and equipment durability.

[0032] In one embodiment of this application, please refer to the following: Figure 3 and Figure 4 The cutting unit 103 includes a cutting tool 130, a cutting disc 131, and a cutting drive assembly 140. The cutting disc 131 is mounted on the positioning shaft 120 and connected to the cutting drive assembly 140. The cutting tool 130 is detachably mounted on the cutting disc 131.

[0033] In this embodiment, the cutting disc 131 serves as the mounting carrier for the cutting tool 130. Its sleeve structure with the positioning shaft 120 ensures that the rotation axis of the cutting tool 130 is highly coincident with the axis of the positioning shaft 120, thereby guaranteeing the coaxiality and flatness of the weld seam 11 cut during the cutting process. The cutting tool 130 is detachably mounted, allowing for quick disassembly and replacement when the tool wears or needs to be changed according to different pipe diameters, without requiring overall adjustment of the cutting disc 131, effectively reducing maintenance costs and replacement time. The cutting drive assembly 140 provides stable rotational power to the cutting disc 131, and its output speed can be adjusted according to the material of the pipe fitting 10 and the thickness of the weld seam 11 to achieve optimal cutting efficiency and cut quality. During the cutting operation, the cutting drive assembly 140 drives the cutting disc 131 to rotate at high speed, which in turn drives the cutting tool 130 to precisely cut the weld 11 of the pipe fitting 10. At the same time, with the stable support of the positioning and sealing unit 101, it ensures that the tool will not deviate from the preset cutting trajectory due to vibration during the cutting process, thereby improving the accuracy and consistency of the weld 11 cutting.

[0034] In one embodiment of this application, please refer to Figure 4 The cutting drive assembly 140 includes a drive shaft 141, a first bevel gear 142, a second bevel gear 143, and a first drive motor 144. The drive shaft 141 is coaxially arranged with the positioning shaft 120, and the drive shaft 141 is sleeved on the positioning shaft 120 and rotatably connected to the mounting part 110. The cutting disc 131 is fixed on the drive shaft 141. The first bevel gear 142 is fixed on the drive shaft 141. The second bevel gear 143 meshes with the first bevel gear 142. The first drive motor 144 is connected to the second bevel gear 143.

[0035] In this embodiment, the first drive motor 144 drives the second bevel gear 143 to rotate, which in turn drives the first bevel gear 142 meshing with it to rotate synchronously, thereby driving the transmission shaft 141 to rotate around the axis of the positioning shaft 120, ultimately achieving high-speed rotation of the cutting disc 131. This bevel gear transmission structure cleverly converts the output shaft direction of the first drive motor 144 with the axial direction of the transmission shaft 141, allowing the motor to be installed in a plane perpendicular to the axis of the positioning shaft 120. This effectively saves installation space along the axis of the positioning shaft 120, facilitating a more compact overall tool design. Simultaneously, the bevel gear transmission features high transmission efficiency and a stable transmission ratio, ensuring that the power from the first drive motor 144 is smoothly and accurately transmitted to the cutting disc 131. This guarantees that the cutting tool 130 maintains stable cutting performance at different speeds, improving the quality and efficiency of weld seam 11 cutting. The rotational connection between the transmission shaft 141 and the mounting component 110 uses high-precision bearings, effectively reducing mechanical losses and vibration noise during transmission and extending the service life of the cutting unit 103.

[0036] In one embodiment of this application, please refer to the following: Figure 3 and Figure 4 The cutting unit 103 also includes an elastic cover 150 mounted on the mounting member 110. The elastic cover 150 is configured to cover the pipe 10 and deform elastically along the axial direction. An absorption hole is provided on the mounting member 110, and the absorption hole communicates with the cavity inside the elastic cover 150.

[0037] In this embodiment, the external suction device can extract the machining chips from the elastic protective cover 150 in real time through the absorption hole, preventing chips from accumulating in the confined space and affecting the normal operation of the cutting tool 130. It also prevents chips from scratching the inner wall of the pipe fitting 10 or adhering to the surface of the positioning block 121, ensuring smooth movement and positioning accuracy of the positioning block 121. The diameter of the absorption hole can be designed according to the expected chip discharge rate, and a funnel-shaped chip collection structure can be set at its inlet end to expand the chip suction range and improve collection efficiency. In practical applications, the external suction device can be an industrial vacuum cleaner or a dedicated negative pressure system. By adjusting the suction strength, metal chips can be effectively removed without interfering with the cutting process due to excessive suction, achieving a clean and safe processing environment.

[0038] Specifically, a collection bag can be installed at the absorption port to collect chips. The collection bag is detachably installed at the outlet end of the absorption port via a snap-on or threaded connection. When the amount of chips in the collection bag reaches a certain level, the operator can quickly remove it and replace it with a new one, avoiding the tedious operation of frequently cleaning the inside of the suction device. The collection bag can be made of high-strength, wear-resistant materials, such as nylon woven fabric or polyester fiber composite film, which can withstand the impact and friction of chips while preventing the leakage of fine particles. Its transparent design allows the operator to visually observe the chip filling level inside and replace it promptly, ensuring the continuous and stable operation of the chip suction system.

[0039] This embodiment applies to a steam generator in a nuclear power plant. Please refer to [link / reference needed]. Figure 8 The tube to be maintained, 10, is a heat transfer tube, which is installed on the tube sheet 20. The free end of the elastic shield 150 abuts against the tube sheet 20, forming a sealed space in the processing area of ​​the cutting tool 130, effectively preventing the processing chips generated during the cutting process from spreading to the external environment. Utilizing the elasticity of the elastic shield 150 itself, the free end of the elastic shield 150 can fit more closely to the tube sheet 20. Even if there are slight unevenness on the surface of the tube sheet 20 or installation errors between the mechanism and the tube sheet 20, a good seal can be achieved through elastic deformation to avoid chip leakage.

[0040] In one embodiment of this application, the cutting and sealing mechanism 100 further includes a push rod drive assembly, which is connected to the push rod 123 and is used to drive the push rod 123 to reciprocate.

[0041] In this embodiment, the push rod drive assembly enables automated control of the reciprocating movement of the push rod 123, eliminating the need for manual operation and improving the accuracy and efficiency of the state switching of the positioning block 121. This is particularly suitable for continuous cutting operations of batches of pipe fittings 10. By driving the push rod 123, the timing of the switching between the first and second states of the positioning block 121 can be stably controlled, ensuring that the positioning block 121 reliably retracts when the pipe fitting 10 is inserted and firmly abuts against the inner wall of the pipe fitting 10 at the cutting position. This avoids errors and instabilities that may be caused by manual operation, further ensuring the safety and stability of the cutting process.

[0042] In one embodiment of this application, please refer to the following: Figure 3 and Figure 4 The push rod drive assembly includes a second drive motor 161 and a conversion box 162. The input end of the conversion box 162 is connected to the output end of the second drive motor 161, and the output end of the conversion box 162 is connected to the push rod 123. The conversion box 162 is used to convert the rotational motion of the second drive motor 161 into the linear motion of the push rod 123.

[0043] In this embodiment, the conversion box 162 can be equipped with a gear and rack mechanism, a ball screw pair, or a worm gear transmission structure to efficiently convert the rotary motion output by the second drive motor 161 into the linear motion required by the push rod 123. Taking the ball screw pair as an example, the screw in the conversion box 162 is connected to the output shaft of the second drive motor 161 through a coupling, and the nut is fixed to the push rod 123. When the second drive motor 161 drives the screw to rotate, the nut moves along the screw axis, thereby driving the push rod 123 to achieve reciprocating linear motion. This transmission method has the characteristics of high transmission accuracy, smooth operation, and fast response speed. It can accurately control the displacement of the push rod 123, thereby precisely adjusting the extension distance of the positioning block 121 to adapt to the positioning requirements of pipe fittings 10 with different inner diameters. At the same time, the conversion box 162 plays a sealing and protection role for the internal transmission components, effectively preventing external dust, chips, and other impurities from entering and affecting the transmission performance, and extending the service life of the push rod drive assembly.

[0044] In one embodiment of this application, please refer to Figure 3 A limit switch 170 is installed on the mounting component 110, and the limit switch 170 extends toward the positioning shaft 120 toward the pipe component 10.

[0045] In this embodiment, when the positioning shaft 120 drives the mechanism to extend into the pipe 10 and move to the preset cutting position, the limit switch 170 will be triggered. The trigger switch will send an electrical signal, which can be used to control the push rod drive assembly to start, drive the push rod 123 to move so that the positioning block 121 switches to the second state to achieve positioning. At the same time, it can also be used as a trigger signal to start the cutting action, ensuring the accuracy of the cutting position.

[0046] Specifically, the limit switch 170 is equipped with an indicator light. When the limit switch 170 is triggered, the indicator light illuminates, providing the operator with a direct indication of the position. In actual operation, the trigger threshold of the limit switch 170 can be preset according to the length of different pipe fittings 10 and the position of the weld seam 11. By adjusting the installation position or built-in parameters of the limit switch 170 on the mounting component 110, precise control of the cutting position of pipe fittings 10 of different specifications can be achieved.

[0047] In one embodiment of this application, please refer to Figure 4 The plug feeding mechanism includes a plug feeding assembly 300 and a feeding drive assembly 400. The feeding drive assembly 400 is mounted on the first drive mechanism 200 or the cutting and sealing mechanism 100. The plug feeding assembly 300 is configured to store plugs 301 and drive the plugs 301 to move, and is connected to the feeding drive assembly 400. The feeding drive assembly 400 is configured to drive the plug feeding assembly 300 to move so that the plugs 301 are fitted onto the positioning and sealing unit 101. Specifically, in this embodiment, the feeding drive assembly 400 is mounted on the cutting and sealing mechanism 100.

[0048] In one embodiment of this application, please refer to the following: Figure 6 and Figure 7 The plug feeding assembly 300 includes a base plate 310, an outer cover 320, and a push plate 330; it is connected to the feeding drive assembly 400; the outer cover 320 is placed on the base plate 310, the inner wall of the outer cover 320 is provided with a guide groove, the outer wall of the plug 301 is provided with a guide protrusion, and the guide protrusion is slidably connected to the guide groove; the push plate 330 is disposed above the base plate 310 and is slidably connected to the outer cover 320, the push plate 330 is provided with multiple slots 370, the slots 370 are used to place the plug 301, and the push plate 330 is used to move the plug 301 out to the outside of the outer cover 320.

[0049] In this embodiment, the base plate 310 of the plug feeding assembly 300 provides a stable mounting foundation for the entire assembly, while the outer cover 320 forms a closed receiving space, effectively preventing the plugs 301 from being disturbed by the external environment or accidentally falling off during storage and pushing. The push plate 330, as the core component for conveying the plugs 301, has a sliding connection design with the outer cover 320 that ensures smooth movement. The multiple locking positions 370 enable the orderly arrangement and storage of multiple plugs 301, improving the tool's continuous operation capability.

[0050] In one embodiment of this application, please refer to Figure 7 The plug feeding assembly 300 also includes an elastic pressure rod 340 and a step distance sensor 350; the side wall of the outer cover 320 is provided with a guide hole, the elastic pressure rod 340 is movably disposed in the guide hole and abuts against the plug 301 to prevent the plug 301 from moving radially; the step distance sensor 350 is disposed inside the outer cover 320 and is used to identify the pushing distance of the push plate 330.

[0051] In this embodiment, the elastic pressure rod 340 continuously abuts against the plug 301, providing stable axial pressure to ensure that the plug 301 maintains an accurate posture in the locking position 370, avoiding wobbling due to gaps that could affect pushing accuracy. The step distance sensor 350 accurately identifies the pushing distance of the push plate 330 by monitoring the displacement data of the push plate 330 in real time. When the push plate 330 moves to the set step distance, the step distance sensor 350 sends a signal to the control system, ensuring that the translation component 430 pushes only one plug 301 into the installation position each time, effectively avoiding the problem of repeated or missed pushing of the plug 301, and providing reliable position feedback for the automated control of the plug 301 installation process.

[0052] In one embodiment of this application, please refer to Figure 7 The locking position 370 is provided with a one-way lever 360. When the push plate 330 moves to the outside of the outer cover 320, the one-way lever 360 abuts against the plug 301 to push the plug 301 out of the outer cover 320. When the push plate 330 moves to the inside of the outer cover 320, the one-way lever 360 swings to separate the one-way lever 360 from the plug 301.

[0053] In this embodiment, by setting a one-way lever 360, the one-way push-out function of the plug 301 is realized. That is, when the push plate 330 retracts, it will not bring the already pushed-out plug 301 back into the outer cover 320, ensuring the independence and accuracy of each push action. This design effectively avoids the plug 301 from getting stuck or flowing back during the push-out process, improving the efficiency and reliability of the plug 301 installation process.

[0054] In one embodiment of this application, please refer to the following: Figure 3 and Figure 4 The feeding drive assembly 400 includes a connecting frame 410, a lifting component 420, and a translating component 430. The lifting component 420 is mounted on the connecting frame 410 and connected to the base plate 310. The lifting direction of the lifting component 420 is parallel to the axial direction of the positioning and sealing unit 101. The translating component 430 is mounted on the base plate 310 and connected to the push plate 330. The translating component 430 is used to drive the push plate 330 to move along the X-axis direction to move the plug 301 out to the outside of the outer cover 320.

[0055] In this embodiment, the lifting member 420 moves the plug feeding assembly 300 above the positioning and sealing unit 101, and the translation member 430 adjusts the position of the plug 301 so that the axis of the plug 301 coincides with the axis of the positioning and sealing unit 101. Then, the lifting member 420 drives in the opposite direction so that the plug 301 is fitted onto the positioning and sealing unit 101. After the plug 301 is fitted, the translation member 430 resets, preparing for the push of the next plug 301. The connecting frame 410 serves as a connecting bridge between the feeding drive assembly 400 and the cutting and sealing mechanism 100. Its structural design ensures the stability of the plug feeding assembly 300 during the movement of the cutting and sealing mechanism 100, avoiding positioning deviation of the plug 301 caused by relative shaking between the mechanisms.

[0056] Specifically, the lifting component 420 can adopt an electric push rod or cylinder drive structure, controlling the lifting height of the plug feeding assembly 300 through a preset stroke to ensure the docking accuracy between the plug 301 and the positioning and sealing unit 101; the translation component 430 can adopt a combination of ball screw and servo motor drive, achieving precise pushing of the plug 301 by accurately controlling the moving distance of the push plate 330. Figure 7 As shown in the figure, the double-headed arrows indicate the direction of movement of the push plate 330.

[0057] In one embodiment of this application, please refer to Figure 2 The first drive mechanism 200 includes an X-axis moving component 210, a Y-axis moving component 220, a Z-axis moving component 230, and a mounting frame 240. The Z-axis moving component 230 is slidably connected to the cutting and sealing mechanism 100 and is configured to push the cutting and sealing mechanism 100 to move along the Z-axis direction. The Z-axis direction is parallel to the axis direction of the positioning and sealing unit 101. The X-axis moving component 210 is slidably connected to the Z-axis moving component 230 and is configured to push the Z-axis moving component 230 to move along the X-axis direction. The X-axis moving component 210 is mounted on the mounting frame 240, and the Y-axis moving component 220 is slidably connected to the mounting frame 240 and is configured to push the mounting frame 240 to move along the Y-axis direction.

[0058] In this embodiment, a three-dimensional position adjustment system is constructed by setting up an X-axis moving component 210, a Y-axis moving component 220, and a Z-axis moving component 230, which can meet the precise positioning requirements of the cutting and sealing mechanism 100 in confined working environments. The X-axis moving component 210 and the Y-axis moving component 220 cooperate with each other to move the cutting and sealing mechanism 100 along two vertical dimensions in the horizontal direction, that is, to make the axis of the cutting and sealing mechanism 100 coincide with the axis of the pipe to be cut 10, thereby quickly adjusting the axis of the positioning and sealing unit 101 to coincide with the axis of the pipe to be cut 10, ensuring the coaxiality accuracy of subsequent cutting and positioning operations. The Z-axis moving component 230 is specifically responsible for linear pushing along the axis of the positioning and sealing unit 101. After the positioning and sealing unit 101 is aligned with the pipe fitting 10, the Z-axis moving component 230 drives the cutting and sealing mechanism 100 to move forward as a whole, so that the positioning and sealing unit 101 and the cutting unit 103 can be smoothly inserted into the pipe fitting 10, providing stable feed power for subsequent positioning and fixing and cutting of the weld 11. This multi-axis coordinated adjustment method effectively improves the adaptability and operational accuracy of the tool under complex working conditions.

[0059] Specifically, the X-axis moving assembly 210 includes an X-axis slide rail, an X-axis drive, an X-axis lead screw, an X-axis nut, and an X-axis slider seat. The X-axis slide rail is mounted on the mounting bracket 240, and the X-axis slider seat is mounted on the Z-axis moving assembly 230. The X-axis slide rail and the X-axis slider seat are slidably connected. The X-axis drive is mounted on the X-axis slide rail, the X-axis lead screw is connected to the X-axis drive, and the X-axis lead screw and the X-axis nut are threadedly connected. The X-axis nut is mounted on the X-axis slider seat. The X-axis drive drives the X-axis lead screw to rotate, thereby causing the X-axis nut and the X-axis slider seat fixed thereto to slide along the X-axis slide rail, realizing the translational adjustment of the Z-axis moving assembly 230 and the cutting and sealing mechanism 100 along the X-axis direction.

[0060] The Y-axis moving assembly 220 is connected to the conveying platform 30, which transports the entire pipe weld cutting and sealing device to the work position. The Y-axis moving assembly 220 includes a Y-axis slide rail, a Y-axis drive, a Y-axis lead screw, a Y-axis nut, and a Y-axis slider seat. The Y-axis slide rail is fixed on the conveying platform 30, and the Y-axis slider seat is connected to the mounting bracket 240. The Y-axis slide rail and the Y-axis slider seat form a sliding fit. The Y-axis drive is mounted on the Y-axis slide rail, and the Y-axis lead screw is connected to the Y-axis drive. The Y-axis lead screw and the Y-axis nut are driven by threads, and the Y-axis nut is mounted on the Y-axis slider seat. The Y-axis drive unit drives the Y-axis lead screw to rotate, which in turn drives the Y-axis nut and the Y-axis slider seat fixed thereto to slide along the Y-axis slide rail seat. The mounting bracket 240 connected to the Y-axis slider seat slides along the Y-axis direction together. The X-axis moving component 210 is mounted on the mounting bracket 240, which in turn drives the X-axis moving component 210 to move along the Y-axis direction, thereby realizing the translational adjustment of the X-axis moving component 210 and the Z-axis moving component 230 connected thereto, as well as the cutting and sealing mechanism 100, along the Y-axis direction.

[0061] The Z-axis moving assembly 230 includes a Z-axis slide rail, a Z-axis drive, a Z-axis lead screw, a Z-axis nut, and a Z-axis slider seat. The Z-axis slide rail is fixed to the X-axis slider seat. The Z-axis slider seat is used to mount the cutting and sealing mechanism 100. The Z-axis slide rail and the Z-axis slider seat are slidably connected. The Z-axis drive is mounted on the Z-axis slide rail, and the Z-axis lead screw is connected to the Z-axis drive. The Z-axis lead screw and the Z-axis nut are connected by a threaded drive. The Z-axis nut is mounted on the Z-axis slider seat. The Z-axis drive drives the Z-axis lead screw to rotate, which in turn drives the Z-axis nut and the Z-axis slider seat fixed to it to slide along the Z-axis slide rail, realizing the precise pushing of the cutting and sealing mechanism 100 along the Z-axis direction, ensuring that the positioning and sealing unit 101 and the cutting unit 103 can extend into the pipe 10 to a preset depth.

[0062] In one embodiment of this application, please refer to the following: Figure 1 and Figure 2 The pipe fitting weld cutting and sealing device also includes an image acquisition component. The mounting frame 240 has a first side, a second side and a third side. The X-axis moving component 210 is installed on the first side, the Y-axis moving component 220 is installed on the second side, and the image acquisition component is installed on the third side.

[0063] In this embodiment, the mounting frame 240 adopts a stable triangular structure, which can provide stable support for the X-axis moving component 210, the Y-axis moving component 220, and the image acquisition component. After the image acquisition component is installed on the third side of the mounting frame 240, it can perform real-time image acquisition of the weld seam of the pipe fitting 10 and transmit the acquired image information to the control system so that the operator can understand the situation during the cutting and sealing process in a timely manner and make precise control of the device based on the image feedback, thereby further improving the accuracy and quality of cutting and sealing. Specifically, the image acquisition component includes a monitoring camera 500, which is a high-resolution, high-frame-rate industrial camera that can clearly capture the detailed features of the weld seam of the pipe fitting 10, ensuring image clarity and accuracy even under high-speed cutting or complex lighting conditions.

[0064] The working process of the pipe fitting weld cutting and sealing device provided in this application embodiment: First, the first drive mechanism 200 aligns the positioning and sealing unit 101 with the port of the pipe fitting 10 to be processed. The push rod drive assembly is activated, placing the positioning block 121 in the first state. Then, the Z-axis movement assembly 230 of the first drive mechanism 200 extends the positioning shaft 120 into the pipe fitting 10 until the limit switch 170 is triggered, at which point the positioning shaft 120 reaches the preset cutting position. Next, the push rod drive assembly drives the push rod 123 to move, and through the cooperation of the conical surface and the inclined surface, the positioning block 121 switches to the second state, tightly adhering to the inner wall of the pipe fitting 10 for positioning. Afterward, the cutting unit 103 is activated. The first drive motor 144 drives the cutting disc 131 to rotate via bevel gear transmission. Simultaneously, the elastic guard 150 abuts against the pipe plate 20 outside the pipe fitting 10, forming a sealed space. The external suction device begins collecting chips through the absorption holes, and the cutting blade 130 precisely cuts the weld 11. After the cutting is completed, the cutting unit 103 stops working, the push rod drive assembly reverses the push rod 123, the elastic element 122 resets the positioning block 121 to the first state, and the Z-axis moving assembly 230 reverses the movement of the positioning shaft 120 to be pulled out of the tube 10.

[0065] Subsequently, the feeding drive assembly 400 starts working, and the lifting component 420 moves the plug feeding assembly 300 above the positioning and sealing unit 101. The position of the plug 301 is adjusted by the translation component 430 so that the axis of the plug 301 coincides with the axis of the positioning and sealing unit 101. Then, the lifting component 420 drives in the opposite direction so that the plug 301 is fitted onto the positioning and sealing unit 101. After the plug 301 is fitted, the translation component 430 resets, preparing for the push of the next plug 301. The first drive mechanism 200 is restarted, aligning the positioning and sealing unit 101, fitted with the plug 301, with the port of the pipe fitting 10 to be processed. The Z-axis moving assembly 230 extends the plug 301 into the pipe fitting 10. When the limit switch 170 is triggered, it indicates that the plug 301 installation position has been reached. At this time, the Z-axis moving assembly 230 automatically stops. Then, the push rod drive assembly is restarted, moving the push rod 123 to switch the positioning block 121 from the first state to the second state. The second drive motor 161 is controlled by torque mode, following the plug 301 installation requirements until the set torque is reached. At this time, the plug 301 is expanded and connected inside the pipe fitting 10, completing the installation and expansion of the plug 301. Then, the positioning block 121 is controlled to return to the first position, and the Z-axis moving assembly 230 drives the positioning shaft 120 to descend and disengage from the pipe fitting 10. This completes the sequential cutting of the weld 11 and the installation of the plug 301.

[0066] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pipe weld cut plug device, comprising: The utility model relates to a cutting and plugging device for pipe, comprising: a first driving mechanism; a cutting and plugging mechanism, which comprises a positioning and plugging unit and a cutting unit, the positioning and plugging unit is installed on the first driving mechanism, the cutting unit is connected with the positioning and plugging unit, the axis of the positioning and plugging unit coincides with the rotation axis of the cutting unit, the positioning and plugging unit is arranged to extend into the inner hole of a pipe to position the cutting unit on the pipe and install a plug in the pipe, and the cutting unit is arranged to cut the weld of the pipe; and a plug feeding mechanism, which is installed on the first driving mechanism or the cutting and plugging mechanism and is arranged to store the plug and feed the plug to the cutting and plugging mechanism.

2. The pipe weld cut plug apparatus of claim 1, wherein, The positioning and plugging unit comprises a mounting member, a positioning shaft and a plurality of positioning blocks, the positioning shaft is connected with the cutting unit, the positioning shaft is installed on the mounting member, a plurality of the positioning blocks are arranged at the end of the positioning shaft away from the mounting member and are distributed along the circumferential direction of the positioning shaft, the positioning blocks are arranged to reciprocate along the radial direction of the positioning shaft, and the cutting unit is sleeved on the positioning shaft and located between the mounting member and the positioning blocks.

3. The pipe weld cut plug apparatus of claim 2, wherein, The positioning shaft is provided with a guide hole extending in the axial direction and a plurality of hollow parts corresponding to the positioning blocks, the hollow parts are communicated with the guide hole, the positioning blocks are movably arranged in the hollow parts one by one, and the side of the positioning blocks facing the guide hole is a slope. The guide hole is provided with a push rod with a tapered surface, the tapered surface is arranged to cooperate with the slope to drive the positioning blocks to reciprocate along the radial direction of the positioning shaft. The positioning and plugging unit further comprises an elastic member, and the elastic member is arranged to constrain the plurality of positioning blocks on the positioning shaft.

4. The pipe weld cut plug apparatus of claim 2, wherein, The cutting unit comprises a cutting tool, a cutting cutter and a cutting driving assembly, the cutting cutter is sleeved on the positioning shaft and connected with the cutting driving assembly, and the cutting tool is detachably installed on the cutting cutter.

5. The pipe weld bevel cutting and blocking apparatus of claim 4, wherein, The cutting unit further comprises an elastic shield installed on the mounting member, and the elastic shield is arranged to cover the pipe and elastically deform in the axial direction. The mounting member is provided with an absorption hole, and the absorption hole is communicated with a cavity in the elastic shield.

6. The pipe weld cut plug apparatus of claim 1, wherein, The plug feeding mechanism comprises a plug feeding assembly and a feeding driving assembly, the feeding driving assembly is installed on the first driving mechanism or the cutting and plugging mechanism, the plug feeding assembly is arranged to store the plug and drive the plug to move and is connected with the feeding driving assembly, and the feeding driving assembly is arranged to drive the plug feeding assembly to move so that the plug is sleeved on the positioning and plugging unit.

7. The pipe weld bevel cutting and blocking apparatus of claim 6, wherein, The plug feeding assembly comprises: a bottom plate connected with the feeding driving assembly; an outer cover sleeved on the bottom plate, an inner wall of the outer cover is provided with a guide groove, an outer wall of the plug is provided with a guide protrusion, and the guide protrusion is slidably connected with the guide groove; and A push plate is arranged above the bottom plate and is in sliding connection with the outer cover. The push plate is provided with a plurality of clamping positions for placing the plug. The push plate is used to move the plug out of the outer cover.

8. The pipe weld bevel cutting and blocking apparatus of claim 7, wherein, The plug feeding assembly further comprises: An elastic pressing rod. The side wall of the outer cover is provided with a guide hole. The elastic pressing rod is movably arranged in the guide hole and is in abutment with the plug to prevent the plug from moving along the radial direction; and A step sensor is arranged in the outer cover. The step sensor is used to identify the pushing distance of the push plate.

9. The pipe weld bevel cutting and blocking apparatus of claim 7 wherein, The clamping position is provided with a one-way block. When the push plate moves out of the outer cover, the one-way block is in abutment with the plug to push the plug out of the outer cover. When the push plate moves into the outer cover, the one-way block swings to separate the one-way block from the plug.

10. The pipe weld bevel cutting and plugging apparatus of claim 7, wherein, The feeding drive assembly comprises a connecting frame, a lifting member and a translation member. The lifting member is mounted on the connecting frame and is connected with the bottom plate. The lifting direction of the lifting member is parallel to the axis direction of the positioning and plugging unit. The translation member is mounted on the bottom plate and is connected with the push plate. The translation member is used to drive the push plate to move along the X-axis direction to move the plug out of the outer cover.

11. A pipe weld cutting and plugging apparatus according to any one of claims 1 to 10, wherein, The first drive mechanism comprises an X-axis moving assembly, a Y-axis moving assembly, a Z-axis moving assembly and a mounting frame. The Z-axis moving assembly is in sliding connection with the cutting and plugging mechanism and is arranged to push the cutting and plugging mechanism to move along the Z-axis direction. The Z-axis direction is parallel to the axis direction of the positioning and plugging unit. The X-axis moving assembly is in sliding connection with the Z-axis moving assembly and is arranged to push the Z-axis moving assembly to move along the X-axis direction. The X-axis moving assembly is mounted on the mounting frame. The Y-axis moving assembly is in sliding connection with the mounting frame and is arranged to push the mounting frame to move along the Y-axis direction.

12. The pipe weld bevel cutting and blocking apparatus of claim 11 wherein, The pipe weld cutting and plugging device further comprises an image acquisition assembly. The mounting frame is provided with a first face, a second face and a third face. The X-axis moving assembly is mounted on the first face. The Y-axis moving assembly is mounted on the second face. The image acquisition assembly is mounted on the third face.

Images