Repair device and repair method for manhole threaded holes

Abstract

This invention discloses a repair device and method for manhole threaded holes. The repair device includes: an adapter plate; a repair tool holder including a frame, a drive motor, and a spindle, the spindle being connected to the repair tool; a first support plate on the end of the frame near the spindle, the first support plate being connected to a first slide rail via a first slider; a second slide rail on the first support plate, the second slide rail being perpendicular to the first slide rail, the second slide rail being connected to a second support plate via a second slider; the second support plate being perpendicular to the first support plate; a third slide rail on the second support plate, the drive motor being connected to the third slide rail via a third slider; and an auxiliary tilting carriage including a frame and a tilting bracket mounted on the frame, the tilting bracket being connected to the side of the frame near the drive motor, the tilting bracket being used to keep the repair tool holder perpendicular to the adapter plate. This device can directly process and repair threaded holes at different positions on the outer edge of the manhole, improving repair efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of threaded hole repair technology, and in particular to a repair device and method for manhole threaded holes. Background Technology

[0002] Evaporators are crucial large-scale heat exchange devices in nuclear power generation systems. Each pressurized water reactor unit typically has 2-3 evaporators, each with two manholes in its water chamber for maintenance. These manholes are sealed using flanges. The manholes have equidistant threaded holes. During repeated flange installation and removal, these threaded holes can suffer varying degrees of thread damage, preventing proper bolt and flange installation. This can affect the sealing of the steam generator water chamber and the primary loop of the nuclear reactor. Furthermore, the radiation dose near nuclear-grade evaporator manholes is extremely high, necessitating high-quality thread repair within a tight timeframe. Therefore, repairing the threads using specialized equipment to ensure thread quality and guarantee bolt installation and flange sealing is of paramount importance.

[0003] However, due to the large size of such thread processing equipment and the different locations and angles of the blind holes on the manhole, the flange installation threads on the container can no longer be processed using large professional equipment. Using purely manual tapping is not only time-consuming, but also makes it difficult to guarantee the overall accuracy. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] In view of this, the present invention provides a repair device and method for manhole threaded holes. The repair device establishes a machining reference surface with the manhole threaded hole through an adapter plate, and can accurately position the threaded hole to be machined through a three-axis moving slide on the repair tool holder. The repair device has a simple structure and can directly machine and repair threaded holes at different positions on the outer edge of the manhole, improving repair efficiency and accuracy. In addition, it can enlarge the thread for severely damaged threads, improving the usability of the manhole.

[0006] Specifically, the following technical solutions are included:

[0007] According to a first aspect of the present invention, a repair device for manhole threaded holes is provided, the repair device comprising:

[0008] The adapter plate is fixedly connected to the outer edge of the manhole;

[0009] A repair tool holder includes a frame, a drive motor and a spindle disposed within the frame, the spindle being connected to a repair tool, a first support plate being provided on one end of the frame near the spindle, the first support plate being connected to a first slide rail via a first slider, a second slide rail being provided on the side of the first support plate opposite to the first slider, the second slide rail being perpendicular to the first slide rail, the second slide rail being connected to a second support plate via a second slider, the second support plate being perpendicular to the first support plate, a third slide rail being provided on the second support plate, the drive motor being connected to the third slide rail via a third slider, and the side of the frame near the spindle being disposed near the adapter plate;

[0010] An auxiliary tilting trolley includes a frame and a tilting bracket mounted on the frame. The tilting bracket is connected to the side of the frame near the drive motor and is used to keep the repair tool holder perpendicular to the adapter plate.

[0011] Optionally, the adapter board includes:

[0012] The substrate includes a circular plate and a connecting ear disposed on the circular plate. The connecting ear is provided with a connector, and the substrate is fixedly connected to the threaded hole on the outer edge of the manhole through the connector.

[0013] A boss is disposed on the substrate. The boss is circular in shape and is clearance-fitted with the manhole.

[0014] Optionally, the adapter plate is provided with a first positioning pin, and the frame includes: a first base plate and a second base plate, and a support rod for connecting the first base plate and the second base plate. The first base plate is disposed close to the adapter plate and is provided with a first pin hole. The adapter plate is connected to the first pin hole through the first positioning pin, and the second base plate is connected to the flip bracket.

[0015] Optionally, the second base plate is provided with a second pin hole, the frame further includes a pair of positioning plates, the pair of positioning plates are arranged opposite each other and are located on both sides of the drive motor, the positioning plates are provided with a first positioning hole at the center, and the auxiliary tilting trolley further includes:

[0016] A mounting plate is disposed on the flip bracket. The mounting plate is provided with a second positioning pin. The mounting plate is connected to the second pin hole through the second positioning pin. The mounting plate is also provided with a guide hole.

[0017] The guide rod passes through the first positioning hole and the guide hole in sequence;

[0018] A motor and a reducer are connected to the mounting plate to drive the rotation of the mounting plate;

[0019] The mounting plate includes a U-shaped plate and wing plates disposed on both sides of the U-shaped plate. The U-shaped plate is in contact with the flipping bracket, and the wing plates are a certain distance away from the flipping bracket. The output shaft of the motor and the reducer is fixedly connected to the U-shaped plate and connected to the flipping bracket through a bearing.

[0020] Optionally, the adapter plate is further provided with a second positioning hole, through which the guide rod passes.

[0021] Optionally, the flipping bracket is equipped with a jack, which is positioned away from the mounting plate and located below the second base plate. The jack is used to control the movement of the repair knife holder on the guide rod.

[0022] Optionally, the frame is provided with a mounting slot, and the auxiliary tilting trolley further includes:

[0023] The lead screw is disposed within the mounting slot;

[0024] A connecting rod, one end of which is hinged to the nut of the lead screw, and the other end of which is hinged to the flipping bracket;

[0025] The flipping bracket is hinged to the vehicle frame.

[0026] Optionally, the frame includes:

[0027] A basic frame, one end of which is provided with a handrail, and a flip bracket is hinged to the other end of the basic frame;

[0028] The first traveling wheel is located on the side of the base frame away from the flipping bracket.

[0029] Optionally, the frame further includes:

[0030] The pressure plate groove is U-shaped and is fixedly connected to the base frame. The opening of the pressure plate groove faces the side of the first walking wheel.

[0031] The auxiliary support beam includes a vertically arranged connecting beam and a working beam. The connecting beam is disposed in the groove of the pressure plate groove. The pressure plate groove is provided with bolts for fixing the connecting beam. The working beam is provided with a second traveling wheel on the side away from the connecting beam. The second traveling wheel and the first traveling wheel are located on the same straight line.

[0032] A second aspect of the present invention provides a method for repairing a manhole threaded hole, utilizing the aforementioned manhole threaded hole repair device, the repair method comprising:

[0033] Position the manhole threaded hole to be repaired using the adapter plate;

[0034] The repair tool holder is installed behind the auxiliary tilting trolley and fixed to the adapter plate via a guide rod;

[0035] Adjust the position of the spindle on the repair tool holder to ensure that the axis of the spindle coincides with the axis of the manhole threaded hole to be repaired, and then use the repair tool to repair the manhole threaded hole.

[0036] This invention provides a device and method for repairing manhole threaded holes. The repair device includes an adapter plate fixedly connected to the outer edge of the manhole to establish a machining reference surface. An auxiliary tilting carriage with a tilting bracket ensures the repair tool holder remains perpendicular to the adapter plate, facilitating alignment between the spindle and the manhole threaded hole to be repaired. The repair tool holder includes a first slide rail, a second slide rail, and a third slide rail, forming an XYZ three-axis adjustment mechanism. This mechanism enables precise positioning of the spindle and the manhole threaded hole, solving the repair of manhole threaded holes at different angles and improving the accuracy of repair. The device is simple in structure, easy to operate, and improves the repair efficiency of threaded holes, avoiding the health risks of radiation near nuclear evaporator manholes. It also enlarges severely damaged threads, improving manhole usability.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a repair device for a manhole threaded hole according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of an adapter board according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of a repair tool holder according to an embodiment of the present invention;

[0042] Figure 4 for Figure 3 A schematic diagram of the repair tool holder from another perspective of the illustrated embodiment;

[0043] Figure 5 This is a schematic diagram of an auxiliary tilting trolley according to an embodiment of the present invention;

[0044] Figure 6 This is a flowchart illustrating the steps of a method for repairing a manhole threaded hole according to an embodiment of the present invention.

[0045] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0046] 100 Adapter plate, 110 Base plate, 120 Connector, 130 First positioning pin, 140 Boss, 200 Repair tool holder, 210 Frame, 211 First base plate, 212 Second base plate, 213 Support rod, 220 Drive motor, 230 Spindle, 240 First slide rail, 250 First bearing plate, 260 Second slide rail, 270 Second bearing plate, 280 Third slide rail, 290 Positioning plate, 300 Auxiliary tilting trolley, 310 Frame, 311 Basic frame, 312 First traveling wheel, 313 Pressure plate groove, 314 Auxiliary support beam, 315 Second traveling wheel, 320 Tilting bracket, 330 Mounting plate, 340 Second positioning pin, 350 Guide rod, 360 Jack, 370 Motor and reducer, 380 Connecting rod, 390 Lead screw, 400 Manhole. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Before providing a further detailed description of the embodiments of the present invention, the directional terms used in the embodiments of the present invention, such as "upper part", "lower part" and "side part", are not intended to limit the scope of protection of the present invention.

[0049] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0050] Example 1

[0051] Figure 1 This is a schematic diagram of a repair device for a manhole threaded hole according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a repair tool holder according to an embodiment of the present invention; Figure 4 for Figure 3A schematic diagram of the repair tool holder from another perspective of the illustrated embodiment;

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, one embodiment of the present invention provides a repair device for a manhole threaded hole, the repair device comprising:

[0053] The adapter plate 100 is fixedly connected to the outer edge of the manhole 400;

[0054] The repair tool holder 200 includes a frame 210, a drive motor 220 and a spindle 230 disposed within the frame 210. The spindle 230 is connected to the repair tool. A first support plate 250 is provided on one end of the frame 210 near the spindle 230. The first support plate 250 is connected to a first slide rail 240 via a first slider. A second slide rail 260 is provided on the side of the first support plate 250 away from the first slider. The second slide rail 260 is perpendicular to the first slide rail. The second slide rail 260 is connected to a second support plate 270 via a second slider. The second support plate 270 is perpendicular to the first support plate 250. A third slide rail 280 is provided on the second support plate 270. The drive motor 220 is connected to the third slide rail 280 via a third slider. The side of the frame 210 near the spindle 230 is located near the adapter plate 100.

[0055] The auxiliary tilting trolley 300 includes a frame 310 and a tilting bracket 320 disposed on the frame 310. The tilting bracket 320 is connected to the side of the frame 310 near the drive motor 220. The tilting bracket 320 is used to keep the repair tool holder 200 perpendicular to the adapter plate 100.

[0056] The repair device includes an adapter plate 100, which is fixedly connected to the outer edge of the manhole 400 to establish a machining reference surface. Through the auxiliary tilting carriage 300 and its tilting bracket 320, the repair tool holder 200 can be kept perpendicular to the adapter plate 100, facilitating the alignment of the spindle 230 with the threaded hole of the manhole to be repaired. The repair tool holder 200 includes a first slide rail 240, a second slide rail 260, and a third slide rail 280, forming an XYZ three-axis adjustment mechanism. This mechanism enables precise positioning of the spindle 230 and the threaded hole of the manhole to be repaired, thus solving the repair problem. The XY axis positions the starting position of the repair tool, while the Z axis repairs the thread pitch, improving the accuracy of manhole threaded hole repair. This repair device has a simple structure, is easy to operate, improves the repair efficiency of threaded holes, and avoids the health risks of personnel affected by radiation near the manhole of the nuclear-grade evaporator.

[0057] It should be noted that not all the threaded holes circumferentially located on the outer edge of the manhole 400 need to be repaired. Several normal threaded holes that do not need repair are selected and fixedly connected to the adapter plate 100 to establish a reference working surface for the repair tool. Then, the repair tool holder 200 is installed on the tilting bracket 320 of the auxiliary tilting carriage 300. By adjusting the angle between the tilting bracket 320 and the carriage frame 310, the axis of the spindle 230 on the repair tool holder 200 is made perpendicular to the adapter plate 100. Finally, the specific position of the spindle 230 is adjusted by the first and second sliders to ensure that the repair tool on the spindle 230 is precisely aligned with the root of the thread hole to be repaired. The pitch of the thread hole to be repaired is controlled by the third slider and the drive motor 220 (vertical feed and rotation) (with the thread milling cutter holder and tool installed on the spindle). The repair of the thread hole is achieved by the third slider moving downward at a constant speed according to the pitch of the thread hole and the rotation of the spindle. The device has a simple structure, is easy to install, reduces repair time, and improves repair efficiency. Simultaneously, the position of the repair tool on the spindle 230 is adjusted by the first and second sliders, and the pitch of the threaded hole to be enlarged is controlled by the third slider and the drive motor 220 (vertical feed and rotation). For severely damaged threads, threaded holes with any pitch of enlarged threads can be machined.

[0058] Furthermore, such as Figure 3 As shown, the direction of the first slide 240 is... Figure 3 The front-to-back (inside-outside) direction is set as the X-axis. The second slide rail 260 is set perpendicular to the first slide rail 240, and the horizontal plane where the second slide rail 260 is located is parallel to the horizontal plane where the first slide rail 240 is located. Figure 3 The left-right direction is set as the Y-axis. The third slide 280 is perpendicular to the first slide 240 and the second slide 260, that is... Figure 3 The vertical direction is set as the Z-axis, so that the repair tool holder 200 forms a three-coordinate repair tool. This is beneficial for aligning the axis of the repair tool on the spindle 230 with the axis of the threaded hole to be repaired.

[0059] Figure 2 This is a schematic diagram of an adapter board according to an embodiment of the present invention.

[0060] In one feasible implementation, such as Figure 2 As shown, the adapter board 100 includes:

[0061] The substrate 110 includes a circular plate and a connecting ear disposed on the circular plate. The connecting ear is provided with a connector 120. The substrate 110 is fixedly connected to the threaded hole on the outer edge of the manhole 400 through the connector 120.

[0062] A boss 140 is disposed on the substrate 110. The boss 140 is circular in shape and is clearance-fitted with the manhole 400.

[0063] When there are many threaded holes that need to be repaired on the circumference of the manhole 400, at least one intact threaded hole can be found. The adapter plate 100 can be fixed through one threaded hole. After repairing some threaded holes, more connectors can be used to fix the adapter plate 100, which can improve the stability of threaded hole repair. In this embodiment, a maximum of three connectors 120 are used to fix the adapter plate 100.

[0064] It should be noted that the clearance fit between the boss 140 and the manhole 400 makes it easier to repair threaded holes at different angles in the circumferential direction. When the threaded hole to be repaired cannot be reached by the three-way movement of the repair tool holder 200, the adapter plate can be rotated in time to find an angle that is more convenient for repairing the threaded hole, and the adapter plate 100 can be fixed again. Therefore, changing the angle of the repair tool holder 200 on the adapter plate 100 is more suitable for repairing threaded holes at multiple angles and in multiple directions, improving the accuracy of the repair work.

[0065] Furthermore, the connector 120 can be any part that can be connected by screws or bolts, without limitation; in addition, the repair device of this application is usually used after the cutting and drilling device, that is, after all the bolts are removed. Usually, the threaded holes on the outer edge of the manhole 400 can be used. The main purpose is to re-tapping the drilled holes on the outer edge of the manhole 400 after the cutting and drilling.

[0066] In one feasible implementation, the adapter plate 100 is provided with a first positioning pin 130, and the frame 210 includes: a first base plate 211 and a second base plate 212, and a support rod 213 for connecting the first base plate 211 and the second base plate 212. The first base plate 211 is disposed close to the adapter plate 100 and is provided with a first pin hole. The adapter plate 100 is connected to the first pin hole through the first positioning pin 130, and the second base plate 212 is connected to the flip bracket 320.

[0067] Subsequently, the repair tool holder 200 is lifted by the jack 360 on the auxiliary tilting trolley 300, bringing it closer to the adapter plate 100. The adapter plate 100 and the repair tool holder 200 are then fixed together by the first positioning pin 130. During operation, the jack 360 holds the repair tool holder 200 in place to ensure its stability. It should be noted that at least two first positioning pins 130 are required. This three-point fixing configuration of the two first positioning pins 130 and the jack 360 improves the stability of the repair tool holder 200, thereby improving the stability of the repair tool and the repair accuracy of the threaded hole.

[0068] It should be noted that the first slide rail 240 is set on the first base plate 211. Usually, two first slide rails 240 are set in parallel to ensure the stability of the movement of the first bearing plate 250.

[0069] Figure 5 This is a schematic diagram of an auxiliary tilting trolley according to an embodiment of the present invention.

[0070] In one feasible implementation, such as Figure 5 As shown, the second base plate 212 is provided with a second pin hole, and the frame also includes a pair of positioning plates 290, which are arranged opposite to each other and located on both sides of the drive motor 220. The positioning plate 290 is provided with a first positioning hole at its center. The auxiliary tilting trolley 300 also includes:

[0071] Mounting plate 330 is mounted on flip bracket 320. Mounting plate 330 is provided with second positioning pin 340. Mounting plate 330 is connected to second pin hole through second positioning pin 340. Mounting plate 330 is also provided with guide hole.

[0072] The guide rod 350 passes through the first positioning hole and the guide hole in sequence;

[0073] The motor and reducer 370 are connected to the mounting plate 330 and are used to drive the rotation of the mounting plate 330.

[0074] The mounting plate 330 includes a U-shaped plate and wing plates on both sides of the U-shaped plate. The U-shaped plate contacts the flipping bracket 320, and the wing plates are a certain distance away from the flipping bracket 320. The output shaft of the motor and reducer 370 is fixedly connected to the U-shaped plate and connected to the flipping bracket 320 through a bearing. The motor and reducer 370 are located below the flipping bracket 320. A bearing with a locking function is provided in the guide hole. When the guide rod 350 passes through the guide hole (at this time the bearing with the locking function is not locked) and the first positioning hole, the repair tool holder 200 is lifted by the jack 360 and moved closer to the adapter plate 100. Then, the guide rod 350 passes through the adapter plate 100 and is locked by the bearing with the locking function to prevent the guide rod 350 from moving, improve the stability of the repair tool holder 200, and ensure that the end of the spindle 230 away from the drive motor 220 faces the side of the threaded hole to be repaired.

[0075] It should be noted that the bearing with locking function is a linear bearing with a clamping handle, which ensures that the guide rod 350 can move up and down to a certain position and lock the guide rod 350, thus ensuring the reliability of the guide rod 350's operation.

[0076] Furthermore, two sets of positioning plates 290 can be provided. Each positioning plate 290 includes a main board and a connecting ear protruding from the main board. The connecting ear has a first positioning hole, which is aligned with the guide hole, improving the stability of the guide rod 350 supporting the repair tool holder 200. For example... Figure 3 As shown, the pair of positioning plates 290 located on both sides of the drive motor 220 means that the pair of positioning plates 290 are located on both sides in the Y-axis direction, which can avoid affecting the movement of the spindle 230 driven by the drive motor 220, thereby ensuring the reliability of the repair tool operation.

[0077] In one feasible implementation, the adapter plate 100 is further provided with a second positioning hole, through which the guide rod 350 passes.

[0078] The adapter plate 100 is provided with a second positioning hole, usually two second positioning holes. The guide rod 350 passes through the second positioning hole to ensure the stability of the guide rod 350, thereby improving the stability of the repair tool holder 200 moving on the guide rod 350.

[0079] It should be noted that the pair of second positioning holes are set opposite each other, resulting in more even force distribution and making the repair tool holder 200 move more stably on the guide rod 350.

[0080] In one feasible implementation, a jack 360 is provided on the flipping bracket 320. The jack 360 is positioned away from the mounting plate 330 and is located below the second base plate 212. The jack 360 is used to control the movement of the repair tool holder 200 on the guide rod 350.

[0081] The jack 360 allows the repair tool holder 200 to be pushed toward the adapter plate 100, i.e., the manhole 400. When the jack 360 retracts, the spindle 230 is at a greater distance from the adapter plate 100, which facilitates the installation of the thread milling cutter holder and the cutting tool. Then, the repair tool holder 200 is pushed toward the adapter plate 100 until the distance between the repair tool and the threaded hole to be repaired meets the machining distance. At this point, the jack 360 stops rising. The feed of the repair tool can then be controlled by the third slider on the repair tool holder 200.

[0082] It should be noted that by using the jack 360 to lift, the repair tool holder 200 can move back and forth within a certain range, thereby reducing its size and weight, and improving the working stability and reliability of the repair device. The jack 360 can be either a manual or electric jack, which will not be elaborated further here.

[0083] In one feasible implementation, the frame 310 is provided with a mounting slot, and the auxiliary tilting trolley 300 further includes:

[0084] Lead screw 390, installed in the mounting slot;

[0085] Link 380, one end of which is hinged to the nut of lead screw 390, and the other end of which is hinged to the tilting bracket 320;

[0086] The tilting bracket 320 is hinged to the frame 310.

[0087] The lead screw 390 includes a lead screw, a nut mounted on the lead screw, and a drive component for rotating the lead screw. One end of the connecting rod 380 is hinged to the nut, and the other end of the connecting rod 380 is hinged to the flipping bracket 320. The drive component drives the rotation of the lead screw, causing the nut to move on the lead screw, which in turn drives the connecting rod 380 to move on the lead screw. The movement of the connecting rod 380 changes the angle between the flipping bracket 320 and the frame 310, thus ensuring that the repair tool on the flipping bracket 320 remains perpendicular to the adapter plate 100, suitable for repairing manhole threaded holes at any angle. Furthermore, the drive component can be a motor or a manual crank.

[0088] It should be noted that the flip bracket 320 includes a working plate and a pair of connecting plates. The pair of connecting plates are perpendicular to the working plate and are hinged to the frame 310. The connecting rod 380 is hinged to one of the connecting plates. The working plate has a clearance opening to prevent the guide rod 350 from interfering with the working plate. The mounting plate usually needs to be rotated. When the rotated position corresponds to the working plate position, the clearance opening can prevent the guide rod 350 from interfering with the working plate and affecting the repair work.

[0089] Furthermore, two lead screws 390 and two connecting rods 380 can be configured, with each connecting rod 380 hinged to a pair of connecting plates. This improves the smoothness of the rotation of the tilting bracket 320, but increases cost and structural complexity. The choice depends on actual needs; either one lead screw 390 and one connecting rod 380, or two lead screws 390 and two connecting rods 380, can be used to achieve the rotation of the tilting bracket 320 on the frame 310. It should be noted that the lead screw 390 can be either a ball screw or a T-screw. T-screws have lower precision and transmission efficiency, but are simpler in structure, easier to install, and more economical. Ball screws have high transmission efficiency and precision, but are more complex in structure and installation, and less economical. The choice can be made based on customer requirements and actual conditions.

[0090] In one feasible implementation, the frame 310 includes:

[0091] A basic frame 311 is provided with a handrail at one end and a flip bracket 320 is hinged to the other end of the basic frame 311.

[0092] The first traveling wheel 312 is located on the side of the base frame 311 away from the flipping bracket 320.

[0093] The mounting slot is located on the base frame 311. The outer wall of the mounting slot has an ear plate. The connecting plate of the flip bracket 320 is hinged to the base frame 311 through the ear plate. The handrail on the base frame 311 makes it easier for staff to push the repair device to move, reducing the workload of staff and making it easier to move to any desired location later.

[0094] It should be noted that the basic frame 311 is usually equipped with four first traveling wheels 312. The first traveling wheels 312 are omnidirectional casters. The height of the omnidirectional casters can be adjusted. On the one hand, they can be used on inclined working surfaces to ensure the horizontal position of the basic frame 311. On the other hand, they can also fix the position of the auxiliary tilting trolley 300 to prevent it from moving during operation.

[0095] In one possible implementation, the frame 310 further includes:

[0096] The pressure plate groove 313 is U-shaped and is fixedly connected to the base frame 311. The opening of the pressure plate groove 313 faces the side of the first traveling wheel 312.

[0097] The auxiliary support beam 314 includes a vertically arranged connecting beam and a working beam. The connecting beam is located in the groove of the pressure plate groove 313. Bolts are provided on the pressure plate groove 313 for fixing the connecting beam. A second traveling wheel 315 is provided on the side of the working beam away from the connecting beam. The second traveling wheel 315 and the first traveling wheel 312 are located on the same straight line.

[0098] The auxiliary support beam 314 can extend the length of the base frame 311. First, loosen the bolts on the pressure plate groove 313 to pull out the connecting beam, and then support it on the ground through the working beam and the second traveling wheel 315. After extending to the required length, tighten the bolts to fix the auxiliary support beam 314.

[0099] It should be noted that the rotation of the tilting bracket 320 also causes the repair tool holder 200 on it to rotate together. When it rotates to a certain angle, the weight of the end away from the handrail increases, which may cause the auxiliary tilting trolley 300 to tilt and fall over. By setting the auxiliary support beam 314 and extending the length of the base frame 311, the extension length of the auxiliary support beam 314 can be adjusted according to the tilting angle of the tilting bracket 320. This can ensure the balance of the auxiliary tilting trolley 300, prevent the auxiliary tilting trolley 300 from tipping over, and improve the working stability and reliability of the repair device.

[0100] Example 2

[0101] Figure 6 This is a flowchart illustrating the steps of a method for repairing a manhole threaded hole according to an embodiment of the present invention.

[0102] like Figure 6 As shown, one embodiment of the present invention provides a method for repairing a manhole threaded hole, using the manhole threaded hole repair device of embodiment 1. The repair method includes:

[0103] Step 1: Position the manhole threaded hole to be repaired using the adapter plate;

[0104] Step 2: The repair tool holder is installed behind the auxiliary tilting trolley and fixed to the adapter plate by the guide rod;

[0105] Step 3: Adjust the position of the spindle on the repair tool holder to ensure that the axis of the spindle coincides with the axis of the threaded hole of the manhole to be repaired, and then use the repair tool to repair the threaded hole of the manhole.

[0106] Specifically, in step 1, the boss 140 of the adapter plate 100 is placed inside the manhole 400, and several threaded holes that do not need repair are selected by rotation. The adapter plate 100 is fixed by the connector 120, providing a reference working surface for the subsequent repair tool holder 200. In step 2, the repair tool holder 200 is mounted on the mounting plate 330 of the auxiliary tilting trolley 300 by the positioning plate 290 on the frame 210, and connected by the second positioning pin 340. The second positioning pin 340 and the second pin hole are clearance fit. At the same time, two guide rods 350 are passed through the guide hole and the first positioning hole respectively. On the mounting plate 290, extend the auxiliary support beam 314 on the frame 310 to prevent the auxiliary tilting trolley 300 from tipping over. Adjust the lead screw 390, and push the tilting bracket 320 and the frame 310 through the connecting rod 380. At the same time, drive the mounting plate 330 to rotate through the motor and reducer 370, so that the spindle on the repair tool holder 200 is aligned with the threaded hole to be repaired. At this time, it is also necessary to ensure that the position of the second positioning hole on the adapter plate 100 matches the position of the guide rod 350. After the guide rod 350 extends into the second positioning hole, lock the bearing with the locking function in the guide hole, from two degrees of freedom ( The rotation of the repair tool holder 200 itself and the rotation of the flipping bracket 320 are used to adjust the position and angle of the repair tool on the repair tool holder 200. At this time, the foot support of the universal caster wheel is extended to fix the position of the auxiliary flipping trolley 300. Finally, the repair tool holder 200 is pushed by the jack 360 to move the repair tool holder 200 closer to the adapter plate 100, ensuring that the first positioning pin 130 on the adapter plate 100 limits and fixes the first base plate 211, ensuring the stability of the repair tool on the repair tool holder 200 during operation. In step 3, the repair tool holder 200 is adjusted by the first slider and the second slider. Position the spindle 230 at 0, aligning its axis with the center of the threaded hole to be repaired. Set the threaded hole size, thread processing parameters (pitch, feed rate, and feed depth), and start the drive motor 220 to begin processing. With the cooperation of the first, second, and third sliders, the threaded hole repair is completed. By rotating the adapter plate 100 and mounting plate 330, threaded holes at various angles around the manhole 400 can be repaired. After all repairs are completed, reverse the operation of step two, retract the repair tool holder 200, remove the adapter plate 100, and complete the entire threaded hole repair work.

[0107] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "a plurality" refers to two or more unless otherwise expressly defined.

[0108] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0109] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for repairing manhole threaded holes, characterized in that, The repair device includes: The adapter plate is fixedly connected to the outer edge of the manhole; A repair tool holder includes a frame, a drive motor and a spindle disposed within the frame, the spindle being connected to a repair tool, a first support plate being provided on one end of the frame near the spindle, the first support plate being connected to a first slide rail via a first slider, a second slide rail being provided on the side of the first support plate opposite to the first slider, the second slide rail being perpendicular to the first slide rail, the second slide rail being connected to a second support plate via a second slider, the second support plate being perpendicular to the first support plate, a third slide rail being provided on the second support plate, the drive motor being connected to the third slide rail via a third slider, and the side of the frame near the spindle being disposed near the adapter plate; An auxiliary tilting trolley includes a frame and a tilting bracket mounted on the frame. The tilting bracket is connected to the side of the frame near the drive motor. The tilting bracket is used to keep the repair tool holder perpendicular to the adapter plate. The adapter plate is provided with a first positioning pin. The frame includes a first base plate and a second base plate, and a support rod for connecting the first base plate and the second base plate. The first base plate is disposed close to the adapter plate and is provided with a first pin hole. The adapter plate is connected to the first pin hole through the first positioning pin. The second base plate is connected to the flip bracket.

2. The repair device for manhole threaded holes according to claim 1, characterized in that, The adapter board includes: The substrate includes a circular plate and a connecting ear disposed on the circular plate. The connecting ear is provided with a connector, and the substrate is fixedly connected to the threaded hole on the outer edge of the manhole through the connector. A boss is disposed on the substrate. The boss is circular in shape and is clearance-fitted with the manhole.

3. The repair device for manhole threaded holes according to claim 1, characterized in that, The second base plate is provided with a second pin hole. The frame also includes a pair of positioning plates, which are arranged opposite to each other and located on both sides of the drive motor. A first positioning hole is provided at the center of each positioning plate. The auxiliary tilting trolley also includes: A mounting plate is disposed on the flip bracket. The mounting plate is provided with a second positioning pin. The mounting plate is connected to the second pin hole through the second positioning pin. The mounting plate is also provided with a guide hole. The guide rod passes through the first positioning hole and the guide hole in sequence; A motor and a reducer are connected to the mounting plate to drive the rotation of the mounting plate; The mounting plate includes a U-shaped plate and wing plates disposed on both sides of the U-shaped plate. The U-shaped plate is in contact with the flipping bracket, and the wing plates are a certain distance away from the flipping bracket. The output shaft of the motor and the reducer is fixedly connected to the U-shaped plate and connected to the flipping bracket through a bearing.

4. The repair device for manhole threaded holes according to claim 3, characterized in that, The adapter plate is also provided with a second positioning hole, through which the guide rod passes.

5. The repair device for manhole threaded holes according to claim 3, characterized in that, The flipping bracket is equipped with a jack, which is positioned away from the mounting plate and located below the second base plate. The jack is used to control the movement of the repair knife holder on the guide rod.

6. The repair device for manhole threaded holes according to claim 1, characterized in that, The frame is provided with a mounting slot, and the auxiliary tilting trolley also includes: The lead screw is disposed within the mounting slot; A connecting rod, one end of which is hinged to the nut of the lead screw, and the other end of which is hinged to the flipping bracket; The flipping bracket is hinged to the vehicle frame.

7. The repair device for manhole threaded holes according to claim 1, characterized in that, The vehicle frame includes: A basic frame, one end of which is provided with a handrail, and a flip bracket is hinged to the other end of the basic frame; The first traveling wheel is located on the side of the base frame away from the flipping bracket.

8. The repair device for manhole threaded holes according to claim 7, characterized in that, The chassis also includes: The pressure plate groove is U-shaped and is fixedly connected to the base frame. The opening of the pressure plate groove faces the side of the first walking wheel. The auxiliary support beam includes a vertically arranged connecting beam and a working beam. The connecting beam is disposed in the groove of the pressure plate groove. The pressure plate groove is provided with bolts for fixing the connecting beam. The working beam is provided with a second traveling wheel on the side away from the connecting beam. The second traveling wheel and the first traveling wheel are located on the same straight line.

9. A method for repairing a manhole threaded hole, using the manhole threaded hole repair device according to any one of claims 1 to 8, characterized in that, The repair method includes: Position the manhole threaded hole to be repaired using the adapter plate; The repair tool holder is installed behind the auxiliary tilting trolley and fixed to the adapter plate via a guide rod; Adjust the position of the spindle on the repair tool holder to ensure that the axis of the spindle coincides with the axis of the manhole threaded hole to be repaired, and then use the repair tool to repair the manhole threaded hole.

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