Rapid installation and adjustment device and method for nuclear power large flange face in-situ repair equipment

Abstract

The invention belongs to the technical field of nuclear power station large flange face in-situ machining and repairing, and aims to solve the technical problems that in-situ machining and repairing on-site installation and adjustment of a nuclear power station large flange face need many workers, and efficiency is low. The invention discloses a rapid installation and adjustment device and method for nuclear power large flange face in-situ machining and repairing equipment, the device comprises a base device and an electric rapid expansion mechanism, the electric rapid expansion mechanism comprises a jacking screw rod, a jacking block and a transmission screw rod, the transmission screw rod is connected with a motor, and the motor drives the jacking screw rod to stretch out or retract; according to the method, an electric rapid expansion mechanism is installed on the side edge of a base device, rapid stretching or retracting of a jacking block is achieved through a driving motor, and rapid installation and adjustment of the nuclear power large flange face in-situ machining and repairing equipment are achieved. Rapid installation and adjustment of the nuclear power large flange face in-situ machining and repairing robot can be achieved, the on-site installation and adjustment time of personnel is shortened, and the radiation dose of the personnel is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of in-situ processing and repair of large flange surfaces in nuclear power plants, and in particular relates to a rapid installation and adjustment device and method for in-situ repair equipment of large flange surfaces in nuclear power plants. Background Art

[0002] The nuclear main pump flange sealing structure is the core component of the nuclear power plant. According to regulations, its surface defects, shape and size must be regularly inspected. If defects are found, they need to be repaired in situ to ensure the safe and stable operation of the nuclear power plant.

[0003] The main pump casing is a non-replaceable primary circuit pressure-bearing boundary component at the nuclear power site. Defects that cannot be handled manually during the inspection and maintenance process need to be repaired in situ using a special processing and repair robot. During the repair, the processing and repair device must be securely installed on the main pump casing flange, and good parallelism and coaxiality must be ensured between the processing and repair device and the casing flange. Due to the large size, complex shape and structure of the pump casing flange, and its radioactivity, the processing and repair device should be able to be quickly installed on the pump casing flange, and be able to accurately adjust the parallelism and coaxiality relative to the pump casing flange surface.

[0004] At present, the on-site processing and repair industry mainly adopts manual installation and fixation and on-site adjustment methods, which requires a large number of personnel and has low operating efficiency. Workers will also be exposed to large doses of radiation in the irradiated environment. Summary of the invention

[0005] The purpose of the present application is to provide a rapid installation and adjustment device and method for in-situ processing and repair equipment of large-scale flange surfaces of nuclear power plants, so as to solve the technical problem that the on-site installation and adjustment of in-situ processing and repair of large-scale flange surfaces of nuclear power plants requires a large number of personnel and is inefficient, and to reduce the radiation dose of personnel by reducing the on-site installation and adjustment time of personnel.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] In the first aspect, the present application provides a rapid installation and adjustment device for in-situ repair equipment of large-scale flange surfaces of nuclear power plants, comprising a base device and an electric rapid tightening mechanism arranged on the side of the base device, the electric rapid tightening mechanism comprising a tightening screw, a tightening block arranged at the front end of the tightening screw, and a transmission screw arranged at the rear end of the tightening screw, the transmission screw being connected to a motor, and the motor driving the tightening screw to extend or retract.

[0008] In some embodiments, the electric quick tensioning mechanism has a fixing plate, the fixing plate is provided with a through hole, a fixing nut seat is installed at the through hole, and the tightening screw is arranged through the fixing nut seat.

[0009] In some embodiments, a locking nut is provided on the inner side of the fixing nut seat.

[0010] In some embodiments, the fixing plate is provided with two symmetrically arranged guide rails, and the tightening block is arranged between the two guide rails.

[0011] In some embodiments, an adjusting pad and a linear sleeve are provided at the end of the tightening screw, and the adjusting pad and the linear sleeve are sleeved on the outside of the transmission screw.

[0012] In some embodiments, the tightening block includes a front tightening block, an adjusting screw and a rear tightening block, and the adjusting screw is arranged between the front tightening block and the rear tightening block to adjust the longitudinal position.

[0013] In some embodiments, a reducer mounting frame is provided on the fixing plate, and the motor is mounted on the reducer mounting frame.

[0014] In some embodiments, the output shaft of the motor is connected to the drive screw via a drive rod coupling.

[0015] In some embodiments, the motor includes a speed reducer and a drive motor.

[0016] In a second aspect, the present application provides a method for rapid installation and adjustment of an in-situ repair device for a large-scale flange surface of a nuclear power plant, comprising:

[0017] Step 1: Install two guide columns on the flange end surface, install eight electric quick tightening mechanisms on the sides of the base device respectively, and install several auxiliary positioning support devices on the base device, wherein two of the auxiliary positioning support devices are installed with guide plates;

[0018] Step 2: hoist the in-situ processing and repair robot above the pump casing flange surface of the main pump, and sleeve the guide plate on the auxiliary positioning support device on the guide column. The auxiliary positioning support device falls on the pump casing flange surface, so that the relative parallelism between the in-situ processing and repair robot and the pump casing flange surface is within 1mm, the coaxiality is within 2mm, and the collision between the equipment and the flange surface is avoided during the seating process;

[0019] Step 3: Start the electric quick tightening mechanism, and the tightening block is extended synchronously and initially tightened against the inner wall of the pump casing flange surface;

[0020] Step 4: Remove the auxiliary positioning support device, install the dial indicator on the turning tool arm, rotate the turning tool arm around the flange surface, measure the parallelism of the rotating plane of the in-situ processing and repair equipment relative to the flange surface by the dial indicator, adjust the adjusting screw on the tightening block according to the measurement result to adjust the parallelism, and check the parallelism again after adjustment until the required position is met;

[0021] Step 5: The turning tool arm rotates around the flange surface again, and the coaxiality of the rotation center of the in-situ machining and repair equipment relative to the flange surface is measured by a dial indicator. According to the measurement results, the coaxiality of the equipment relative to the flange surface is adjusted until the machining and repair requirements are met;

[0022] Step 6: Use a dial indicator to measure the coaxiality and parallelism of the in-situ repair equipment relative to the pump casing flange surface again. If the requirements are met, tighten the lock nut to complete the installation adjustment; if the requirements are not met, repeat steps 4 to 6 until the requirements are met.

[0023] In one embodiment, the base device adopts an octagonal base, and the electric quick tightening mechanism is arranged on each side. The eight electric quick tightening mechanisms are set with a unified stroke origin, and the various tightening blocks are driven by a motor to synchronously extend and retract. The position of the processing and repair equipment relative to the flange surface is adaptively adjusted through the push of the tightening blocks.

[0024] Compared with the prior art, the rapid installation and adjustment device and method for in-situ repair equipment of large-scale nuclear power flange surface provided by the present application has the following beneficial effects:

[0025] The present application can realize the rapid installation and adjustment of an in-situ processing and repair robot for large-scale flange surfaces of nuclear power plants, and is used in an in-situ processing and repair robot for the flange surfaces of the pump casing of a nuclear power main pump.

[0026] The present application adopts motor drive to replace the traditional on-site manual adjustment by multiple workers. Only one person is required to operate remotely to achieve the rapid extension and retraction of the support claw, avoiding close-range operation by multiple people on-site, reducing the number of personnel required, reducing the radiation dose of personnel, and improving work efficiency.

[0027] The present application adopts motor drive to realize synchronous extension or retraction of each tightening block. Compared with manual operation by multiple people on site, it greatly improves the synchronization accuracy of the tightening blocks and saves the time of adjusting the coaxiality between the equipment and the flange surface.

[0028] The electric rapid tightening mechanism designed in the present application sets a unified stroke origin, and drives each tightening block to extend and retract synchronously through a motor. The position of the processing and repair equipment relative to the flange surface can be adaptively adjusted through the push of the tightening block, avoiding the trouble of personnel adjusting through lifting equipment, etc.

[0029] The tightening block structure designed in the present application can achieve precise adjustment of the parallelism of the robot relative to the flange surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for the technical description.

[0031] Figure 1 A schematic diagram of the structure of the rapid installation and adjustment device for the in-situ repair equipment of a large-scale flange surface of a nuclear power plant provided in this application;

[0032] Figure 2 A schematic diagram of the structure of the electric rapid tensioning mechanism provided in this application;

[0033] Figure 3 A cross-sectional view of the electric quick tensioning mechanism provided for this application;

[0034] Figure 4 A schematic diagram of the structure of the tightening block provided for this application;

[0035] Figure 5 A cross-sectional view of the tightening block provided for this application.

[0036] Figure 6 A flow chart of the rapid installation and adjustment method of the in-situ repair equipment for large nuclear power flange surfaces provided in this application.

[0037] Description of reference numerals:

[0038] 1. Electric quick tightening mechanism; 2. Turning cutter arm; 3. Pump casing flange surface; 4. Base device; 5. Milling cutter arm; 6. Auxiliary support device;

[0039] 101, tightening block; 102, guide rail; 103, tightening screw; 104, fixing plate; 105, reducer mounting frame; 106, transmission rod coupling; 107, anti-loosening nut; 108, fixing nut seat; 109, adjusting pad; 110 linear sleeve; 111, transmission screw; 112, reducer; 113, driving motor;

[0040] 1011, front tightening block; 1012, adjusting screw; 1013, rear tightening block. DETAILED DESCRIPTION

[0041] The following is further explained in detail through specific implementation methods.

[0042] like Figure 1 As shown, the present application provides a rapid installation and adjustment device for in-situ repair equipment of large-scale flange surfaces of nuclear power plants, comprising: a base device 4, a group of electric rapid tightening mechanisms 1, a turning tool arm 2, a milling tool arm 5, and an auxiliary support device 6.

[0043] A group of electric quick tightening mechanisms 1 are respectively arranged on the sides of the base device 4, preferably evenly arranged on the sides. A slewing bearing is installed on the upper surface of the base device 4, and a cover plate is installed on the upper end face of the slewing bearing. The turning tool arm and the milling tool arm are installed on the cover plate and can rotate with the bearing. There are 8 electric quick tightening devices in total, 4 of which are main supports and the other 4 are auxiliary supports. When installed, one main and one auxiliary are arranged crosswise. The present application designs the electric quick tightening mechanism 1, the base device 4, the turning tool arm 2, the milling tool arm 5, and the auxiliary support device 6 as an integral whole, which can realize the rapid installation and adjustment of the in-situ processing and repair robot for large flange surfaces of nuclear power plants, and is used in the in-situ processing and repair robot for the flange surface of the pump housing of the nuclear power main pump.

[0044] Preferably, the sides of the base device 4 are octagonal, and an electric quick tensioning mechanism 1 is installed on each side.

[0045] like Figure 2 and Figure 3 As shown, the electric quick tensioning mechanism 1 includes a tightening block 101, a guide rail 102, a tightening screw 103, a fixing plate 104, a reducer mounting frame 105, a transmission rod coupling 106, a lock nut 107, a fixing nut seat 108, an adjusting pad 109, a linear sleeve 110, a transmission screw 111, a reducer 112 and a driving motor 113.

[0046] The fixing plate 104 is a flat rectangular plate structure as a whole, with a through hole in the middle for installing a fixing nut seat 108 . A locking nut 107 is installed on the inner side of the fixing nut seat 108 , and the tightening screw 103 passes through the locking nut 107 , the fixing nut seat 108 and the fixing plate 104 .

[0047] A pair of symmetrical guide rails 102 are provided on the left side of the fixing plate 104 , and the tightening block 101 is arranged between the two guide rails 102 .

[0048] A reducer mounting frame 105 is installed on the right side of the fixing plate 104. The reducer mounting frame 105 is an overall "J"-shaped structure with a through hole in the middle. A reducer 112 is installed at the through hole, and its output end (output shaft) passes through the through hole and is connected to the transmission screw 111, for example, through a transmission rod coupling 106. A drive motor 113 is installed on the right side of the reducer 112.

[0049] The tightening screw 103 is screwed into the fixing nut seat 108, the tightening block 101 is installed at the front end of the tightening screw 103, the linear sleeve 110 and the transmission screw 111 are installed at the tail of the tightening screw 103, the driving motor 113 and the reducer 112 are connected as one and fixed to the reducer mounting frame 105 by bolts, and the output end of the reducer 112 is connected to the transmission screw 111 through the transmission rod coupling 106. After assembly, the tightening screw 103 is driven to rotate by the rotation of the driving motor 113, and the tightening block 101 moves horizontally along the guide rail 102. Rapid expansion can be achieved by controlling the synchronous rotation of 8 motors.

[0050] The function of the linear sleeve 110 is to avoid jamming between the transmission screw and the tightening screw and achieve smooth relative axial movement when the transmission screw 111 drives the tightening screw 103 to rotate and move back and forth relative to the fixed nut seat 108.

[0051] The jacking screw 103 is screwed into the fixing nut seat 108 . During operation, the fixing nut seat 108 is kept stationary together with the fixing plate 104 . The jacking screw 103 can be rotated to move forward or backward along the fixing nut seat 108 .

[0052] The output end of the reducer is connected to the transmission screw 111 through the coupling 106, and the motor drives the transmission screw 111 to rotate through the reducer and the coupling. The transmission screw 111 and the jacking screw 103 are matched with an axial hole, and the key on the transmission screw 111 is matched with the keyway on the jacking screw 103. The rotation of the transmission screw 111 drives the jacking screw 103 to rotate, thereby realizing forward or backward movement.

[0053] like Figure 4 and Figure 5 As shown, the tightening block 101 includes a front tightening block 1011, an adjusting screw 1012, and a rear tightening block 1013. The front tightening block 1011 and the rear tightening block 1013 are connected through a dovetail groove and the adjusting screw 1012, and the front tightening block 1011 and the rear tightening block 1013 are adjusted by adjusting the adjusting screw 1012 to achieve relative sliding in the vertical direction, thereby meeting the precise leveling requirements of the processing and repairing device after the initial leveling.

[0054] Optionally, the rear tightening block 1013 is detachably mounted on the front end of the tightening screw rod 103 by means of screws.

[0055] like Figure 6 As shown, the present application provides a method for rapid installation and adjustment of in-situ processing and repair equipment for large-scale flange surfaces of nuclear power plants, which is applicable to in-situ processing and repair of large-scale flange surfaces such as flange sealing surfaces of nuclear power main pumps. The method comprises:

[0056] An octagonal base device 4 is provided to provide an installation foundation for the rotary mechanism of the processing and repairing equipment and its electric rapid tensioning mechanism 1;

[0057] The rotary mechanism of the processing and repairing robot is installed on the upper surface of the base device 4; the processing tool arm and other components (turning tool arm 2, milling tool arm 5) are installed on the rotating ring of the rotary mechanism;

[0058] The eight electric quick tensioning mechanisms 1 are respectively installed on the eight sides of the base device 4; each electric quick tensioning mechanism 1 has a driving motor 113, through which the fastening block 101 is quickly extended or retracted; the front end of the tensioning block 101 is provided with a height adjustment mechanism (such as Figure 5 As shown), the relative height of the front tightening block 101 can be adjusted.

[0059] The eight electric quick tensioning mechanisms 1 are driven by eight driving motors 113 respectively. The eight driving motors 113 can work simultaneously to achieve the synchronous extension or retraction of the eight dynamic quick tensioning mechanisms; or one motor can work alone as needed to achieve the extension or retraction of a certain tightening block alone.

[0060] Specifically, the rapid installation and adjustment method of the in-situ processing and repair equipment for large-scale nuclear power flange surfaces provided by the present application includes:

[0061] Step 1: Install two guide columns on the pump casing flange, and install four auxiliary positioning support devices on the base device 4 of the processing and repair robot.

[0062] Step 2: Use lifting equipment to hoist the in-situ processing and repair robot to the pump casing flange surface 3 of the main pump. The two guide plates are placed on the guide columns to ensure that there is no large deviation in the relative posture between the in-situ processing and repair robot and the pump casing; the four auxiliary positioning support devices fall on the pump casing flange surface 3. At this time, the relative parallelism between the in-situ processing and repair robot and the pump casing flange surface 3 can be controlled within 1 mm.

[0063] Step 3: Simultaneously start eight electric quick tightening mechanisms 1, and eight tightening blocks 101 are synchronously extended and preliminarily tightened against the inner wall of the pump casing flange surface 3, and the coaxiality of the robot relative to the pump casing can be adaptively adjusted to achieve preliminarily centering of the robot and the pump casing flange surface 3.

[0064] Step 4: Remove the auxiliary positioning support, install the dial indicator on the turning tool arm 2, measure the parallelism of the robot relative to the flange surface by dialing, and fine-tune the adjusting screw 1012 on the clamping block 101 according to the measurement result to achieve parallelism adjustment. After adjustment, check the parallelism again by dialing until the required position is met.

[0065] Step 5: Use a meter to measure the coaxiality of the robot relative to the flange surface. Based on the measurement results, fine-tune the coaxiality of the equipment relative to the flange surface until it meets the processing and repair requirements.

[0066] Step 6: Check the coaxiality and parallelism of the robot relative to the flange surface 3 of the pump casing again. If the requirements are met, tighten the lock nut 107 to complete the installation adjustment; if the requirements are not met, repeat steps 4 to 6 until the requirements are met.

[0067] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A rapid installation and adjustment device for in-situ repair equipment of large-scale flange surface of nuclear power, characterized in that: The invention comprises a base device (4) and an electric quick expansion mechanism (1) arranged on the side of the base device (4); the electric quick expansion mechanism (1) comprises a tightening screw (103), a tightening block (101) arranged at the front end of the tightening screw (103), and a transmission screw (111) arranged at the rear end of the tightening screw (103); the transmission screw (111) is connected to a motor, and the motor drives the tightening screw (103) to extend or retract.

2. The rapid installation and adjustment device for in-situ repair of large-scale flange surfaces of nuclear power plants according to claim 1 is characterized in that: The electric quick tensioning mechanism (1) comprises a fixing plate (104), the fixing plate (104) is provided with a through hole, a fixing nut seat (108) is installed at the through hole, and the tightening screw (103) is arranged through the fixing nut seat (108).

3. The rapid installation and adjustment device for in-situ repair equipment of large-scale nuclear power flange surface according to claim 1 or 2, characterized in that: A locking nut (107) is provided inside the fixing nut seat (108).

4. The rapid installation and adjustment device for in-situ repair of large-scale flange surfaces of nuclear power plants according to claim 1 is characterized in that: The fixing plate (104) is provided with two symmetrically arranged guide rails (102), and the tightening block (101) is arranged between the two guide rails (102).

5. The rapid installation and adjustment device for in-situ repair of large-scale flange surfaces of nuclear power plants according to claim 1 is characterized in that: An adjusting pad (109) and a linear sleeve (110) are provided at the end of the tightening screw (103), and the adjusting pad (109) and the linear sleeve (110) are sleeved on the outside of the transmission screw (111).

6. The rapid installation and adjustment device for in-situ repair equipment of large-scale nuclear power flange surface according to claim 1 is characterized in that: The tightening block (101) comprises a front tightening block (1011), an adjusting screw (1012) and a rear tightening block (1013); the adjusting screw (1012) is arranged between the front tightening block (1011) and the rear tightening block (1013) to adjust the longitudinal position.

7. The rapid installation and adjustment device for in-situ repair of large-scale flange surfaces of nuclear power plants according to claim 1 is characterized in that: A speed reducer mounting frame (105) is provided on the fixing plate (104), and the motor is mounted on the speed reducer mounting frame (105).

8. The rapid installation and adjustment device for in-situ repair of large-scale flange surfaces of nuclear power plants according to claim 7 is characterized in that: The output shaft of the motor is connected to the transmission screw (111) via a transmission rod coupling (106).

9. A method for rapid installation and adjustment of in-situ repair equipment for large-scale nuclear power flange surfaces, characterized in that: include: Step 1: Install two guide columns on the flange end surface, install eight electric quick tensioning mechanisms (1) on the sides of the base device (4), install a plurality of auxiliary positioning support devices (6) on the base device (4), and install guide plates on two of the auxiliary positioning support devices (6); Step 2: hoist the in-situ processing and repair robot above the pump casing flange surface (3) of the main pump, the guide plate on the auxiliary positioning support device (6) is sleeved on the guide column, and the auxiliary positioning support device (6) falls on the pump casing flange surface (3), so that the relative parallelism between the in-situ processing and repair robot and the pump casing flange surface (3) is within 1 mm, the coaxiality is within 2 mm, and the device is prevented from colliding with the flange surface during the seating process; Step 3: starting the electric quick expansion mechanism (1), the tightening block (101) is extended synchronously and initially tightened against the inner wall of the pump casing flange surface (3); Step 4: Remove the auxiliary positioning support device (6), install a dial indicator on the turning tool arm (2), rotate the turning tool arm around the flange surface, measure the parallelism of the rotating plane of the in-situ processing and repair equipment relative to the flange surface with the dial indicator, adjust the adjusting screw (1012) on the tightening block (101) according to the measurement result to adjust the parallelism, and recheck the parallelism after adjustment until the required position is met; Step 5: The turning tool arm rotates around the flange surface again, and the coaxiality of the rotation center of the in-situ machining and repair equipment relative to the flange surface is measured by a dial indicator. According to the measurement results, the coaxiality of the equipment relative to the flange surface is adjusted until the machining and repair requirements are met; Step 6: Use a dial indicator to measure the coaxiality and parallelism of the in-situ repair equipment relative to the pump casing flange surface (3). If the requirements are met, tighten the lock nut (107) to complete the installation adjustment; if the requirements are not met, repeat steps 4 to 6 until the requirements are met.

10. The rapid installation and adjustment method for in-situ repair equipment of nuclear power large flange surface according to claim 9 is characterized in that: The base device (4) adopts an octagonal base, and the electric quick tightening mechanism (1) is arranged on each side. The eight electric quick tightening mechanisms (1) are set with a unified stroke origin. The motor drives each of the tightening blocks (101) to synchronously extend and retract. The position of the processing and repairing equipment relative to the flange surface is adaptively adjusted by the pushing of the tightening blocks (101).

Images