Inner hole machining equipment suitable for limited space and using method of inner hole machining equipment

Abstract

The invention relates to the technical field of welding seam machining equipment, in particular to inner hole machining equipment suitable for a limited space and a using method of the inner hole machining equipment. The inner hole machining equipment suitable for the limited space specifically comprises a tool fixing end, a tool adjusting end, a mounting frame, a reaming device and an aligning device. The tool fixing end and the tool adjusting end are located on the two sides of the mounting frame correspondingly and connected with the inner wall of the connecting pipe in an abutting mode. The reaming device is connected with the mounting frame through the aligning device, and the center of the reaming device is coaxial with the center of an inner hole of the to-be-machined connecting pipe. The reaming device is located at the end close to the tool adjusting end. The pipe orifice polishing device has the advantages of replacing manual polishing in an operation space with limited pipe orifice structures and sizes, and being high in efficiency and high in polishing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of weld processing equipment, and particularly relates to an internal hole processing equipment applicable to a confined space and a using method thereof. Background Art

[0002] The main nozzle circumferential welds of the reactor pressure vessel, steam generator, and casing shell adopt a backing plate structure on the back. After welding, it is necessary to machine and remove the backing plate from the inside of the nozzle. Since the height and size of the modular equipment formed after the reactor pressure vessel, steam generator, and casing shell are welded together have exceeded the processing limit of a large boring mill, and the surrounding is an arc or inclined surface structure, it is impossible to use a conventional fixed large boring mill for processing.

[0003] Generally, it is removed by manual grinding, that is, a platform is built inside the product to provide a working station for personnel to operate, and it is removed by manual sanding. Since all the materials inside the product are corrosion-resistant materials and the cleanliness requirements are high, when removing the carbon steel backing plate by manual grinding, it is easy to generate ferrite dust, causing product contamination and being difficult to protect; the operator needs to perform grinding at all positions inside the hole. The structure and size of the nozzle limit the operation space (the position to be ground is in an inner cavity with a small diameter and a large depth), the grinding operation and observation are limited, the operation difficulty is large, the efficiency is low, and the quality risk is high.

[0004] Therefore, in view of the deficiencies of the prior art, an internal hole processing equipment applicable to a confined space is provided. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an internal hole processing equipment applicable to a confined space, aiming to solve the problems of limited operation space, large operation difficulty, low efficiency, and high quality risk caused by the limited structure and size of the nozzle.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An internal hole processing equipment applicable to a confined space includes: a tooling fixed end, a tooling adjustment end, an installation frame, a reaming device, and a centering device;

[0008] The tooling fixed end and the tooling adjustment end are respectively located on both sides of the installation frame, and the tooling fixed end and the tooling adjustment end are in abutting connection with the inner wall of the nozzle;

[0009] The reaming device is connected to the installation frame through the centering device, and the center of the reaming device is coaxial with the center of the inner hole of the nozzle to be processed;

[0010] The reaming device is located at one end close to the tooling adjustment end.

[0011] As a further improvement of the technical solution of the present invention, the reaming device includes a reaming machine, a tool holder and a tool, the tool holder is fixedly connected to the output end of the reaming machine, and the tool holder is fixedly connected to the tool.

[0012] As a further improvement of the technical solution of the present invention, the self-aligning device includes a base nut, a base screw, a self-aligning bracket, a self-aligning nut and a self-aligning screw. The base screw is connected to the reaming machine, the base nut is sleeved on the base screw, the base nut is abutted against the mounting frame, the self-aligning nut is sleeved on the self-aligning screw, the self-aligning screw passes through the self-aligning bracket and is connected to the reaming machine, and the self-aligning bracket is connected to the mounting frame.

[0013] As a further improvement of the technical solution of the present invention, the mounting frame includes a plurality of mounting plates and support rods, the plurality of mounting plates are spliced ​​end to end, the mounting plates are connected to the reaming device through a centering device, and the two ends of the support rods are respectively fixedly connected to the tooling fixed end and the tooling adjustment end.

[0014] As a further improvement of the technical solution of the present invention, the fixed end of the tooling includes a first support frame, a first adjustment stud, a first support leg and a first gasket. The first support frame is connected to the first support leg through the first adjustment stud, the first gasket is fixedly connected to the first support leg, and the first support frame is fixedly connected to the mounting plate and the support rod.

[0015] As a further improvement of the technical solution of the present invention, the tooling adjustment end includes a second support frame, a second adjusting stud, a second support foot and a second gasket. The second support frame is connected to the second support foot through the second adjusting stud, the second gasket is fixedly connected to the second support foot, and the second support frame is fixedly connected to the mounting plate and the support rod.

[0016] As a further improvement of the technical solution of the present invention, the first gasket and the second gasket are conical, and the surfaces of the first gasket and the second gasket are provided with knurling.

[0017] As a further improvement of the technical solution of the present invention, the reaming machine is an 80 reaming machine, and the main shaft diameter of the reaming machine is 80 mm.

[0018] A method for using an inner hole processing device suitable for a confined space is applicable to the inner hole processing device suitable for a confined space, and comprises the following steps:

[0019] S1: Install the fixture fixing end, installation frame and fixture adjustment end. Adjust the fixture fixing end and fixture adjustment end to make the equipment initially press against the inner wall of the pipe, and at the same time initially align the equipment and perform initial centering.

[0020] S2: Provide the tightening force of the axis from both the upper and lower directions through the installation frame to ensure that the fixed end and the adjustment end of the tooling are tightly pressed against the inner wall of the pipe fitting.

[0021] S3: Install the reaming device and make fine adjustments through the centering device to make the center of the reaming device coaxial with the center of the inner hole of the pipe fitting to be machined.

[0022] S4: After the reaming device is aligned, machine the surface to be machined.

[0023] S5: After machining, disassemble the equipment.

[0024] As a further improvement of the technical solution of the present invention, in step S4, before machining, preliminarily machine the surface to be machined, observe the quality of the machined surface. If the surface quality does not meet the standard, analyze the problem and solve and improve it; if the surface quality meets the standard, then formally machine it.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] In the internal hole machining equipment applicable to a confined space provided by the present invention, the equipment is initially pressed against the inner wall of the pipe fitting by adjusting the fixed end and the adjustment end of the tooling, and at the same time, the equipment is initially aligned and initially centered; the tightening force of the axis is provided from both the upper and lower directions through the installation frame to ensure that the fixed end and the adjustment end of the tooling are tightly pressed against the inner wall of the pipe fitting; install the reaming device and make fine adjustments through the centering device to make the center of the reaming device coaxial with the center of the inner hole of the pipe fitting to be machined; and then machine. The internal hole machining equipment applicable to a confined space of the present invention has the characteristics of replacing manual grinding, high efficiency and high grinding quality in an operating space with limited pipe orifice structure and size. Description of the Drawings

[0027] The following further details the technology of the present invention in conjunction with the drawings and specific embodiments:

[0028] Figure 1 is a three-dimensional structural schematic diagram of the internal hole machining equipment applicable to a confined space of the present invention;

[0029] Figure 2 is a structural schematic diagram of the internal hole machining equipment applicable to a confined space of the present invention;

[0030] Figure 3 is a three-dimensional structural schematic diagram of the centering device in the internal hole machining equipment applicable to a confined space of the present invention;

[0031] Figure 4 is a cross-sectional view of the pipe fitting in the present invention.

[0032] In the figure:

[0033] 1. Tooling fixed end; 11. First support frame; 12. First adjusting stud; 13. First foot; 14. First gasket;

[0034] 2. Tooling adjustment end; 21. Second support frame; 22. Second adjusting stud; 23. Second foot; 24. Second gasket;

[0035] 3. Installation frame; 31. Installation plate; 32. Support rod;

[0036] 4. Reaming device; 41. Reaming machine; 42. Tool holder; 43. Tool;

[0037] 5. Centering device; 51. Base nut; 52. Base screw; 53. Centering support; 54. Centering nut; 55. Centering screw;

[0038] 6. Connecting pipe; 61. Circumferential weld. Detailed implementation mode

[0039] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present invention in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0040] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings.

[0041] Refer to Figures 1 to 4 , an internal hole processing device applicable to a confined space, comprising a tooling fixed end 1, a tooling adjustment end 2, an installation frame 3, a reaming device 4 and a centering device 5;

[0042] In one embodiment, the tooling fixed end 1 and the tooling adjustment end 2 are respectively located on both sides of the installation frame 3, and the tooling fixed end 1 and the tooling adjustment end 2 are in top contact connection with the inner wall of the connecting pipe 6; the reaming device 4 is connected to the installation frame 3 through the centering device 5, and the center of the reaming device 4 is coaxial with the center of the inner hole of the connecting pipe 6 to be processed; the reaming device 4 is located at one end close to the tooling adjustment end 2. Preferably, the inner diameter of the processed connecting pipe is φ730mm.

[0043] Among them, by adjusting the tool fixing end 1 and the tool adjustment end 2, the equipment is initially pressed against the inner wall of the pipe 6, and the equipment is initially aligned and initially adjusted; the mounting frame 3 provides the axial tightening force from the upper and lower directions respectively, ensuring that the tool fixing end 1 and the tool adjustment end 2 are tightly pressed against the inner wall of the pipe 6; the reaming device 4 is installed, and the centering device 5 is used for fine adjustment to make the center of the reaming device 4 coaxial with the center of the inner hole of the pipe 6 to be processed; and the processing is performed. The inner hole processing equipment suitable for confined space of the present invention has the characteristics of replacing manual grinding in the operating space with limited pipe mouth structure and size, and has high efficiency and high grinding quality.

[0044] In one embodiment, the reaming device 4 includes a reaming machine 41, a tool holder 42 and a tool 43, wherein the tool holder 42 is fixedly connected to the output end of the reaming machine 41, and the tool holder 42 is fixedly connected to the tool 43. Preferably, the reaming machine 41 is an 80 reaming machine 41, and the spindle diameter of the reaming machine 41 is 80 mm. However, the inner diameter of the pipe 6 to be processed is relatively large, so if the tool 43 is directly installed on the spindle, the tool 43 will extend out a large amount, and the tool will vibrate during the processing. Therefore, when using the 80 reaming machine 41, a tool holder 42 with a larger outer diameter is first added to prevent the tool 43 from extending out too much, ensure the rigidity of the tool 43 during the processing, and reduce the vibration of the tool. The reaming machine 41 is installed on the mounting plate 31, and is radially adjusted by the centering device 5 to adjust the center of the reaming machine 41 to a concentric state with the center of the inner hole to be processed. The outer diameter of the tool holder is about 720 mm-760 mm.

[0045] In one embodiment, the centering device 5 includes a base nut 51, a base screw 52, ​​a centering bracket 53, a centering nut 54 and a centering screw 55 to center the reaming device 4 together. The base screw 52 is connected to the reaming machine 41, the base nut 51 is sleeved on the base screw 52, ​​the base nut 51 is abutted against the mounting frame 3, the centering nut 54 is sleeved with the centering screw 55, the centering screw 55 passes through the centering bracket 53 and is connected to the reaming machine 41, and the centering bracket 53 is connected to the mounting frame 3. Figure 2 As shown, the base nut 51 and the base screw 52 adjust the distance between the reamer and the mounting plate 31 up and down; the self-aligning bracket 53, the self-aligning nut 54 and the self-aligning screw 55 adjust the reamer forward and backward, and the two work together to adjust the center.

[0046] In one embodiment, the mounting frame 3 includes three mounting plates 31 and two support rods 32. The three mounting plates 31 are spliced ​​end to end. The mounting plates 31 are connected to the reaming device 4 through the centering device 5. The two ends of the support rods 32 are respectively fixedly connected to the tooling fixed end 1 and the tooling adjustment end 2. Preferably, different numbers of sections can be used according to actual conditions to meet the installation requirements of confined spaces.

[0047] In one embodiment, the fixed end 1 of the tooling includes a first support frame 11, a first adjusting stud 12, a first foot 13, and a first gasket 14. The first support frame 11 is connected to the first foot 13 through the first adjusting stud 12. The first gasket 14 is fixedly connected to the first foot 13. The first support frame 11 is fixedly connected to the mounting plate 31 and the support rod 32.

[0048] In one embodiment, the adjustment end 2 of the tooling includes a second support frame 21, a second adjusting stud 22, a second foot 23, and a second gasket 24. The second support frame 21 is connected to the second foot 23 through the second adjusting stud 22. The second gasket 24 is fixedly connected to the second foot 23. The second support frame 21 is fixedly connected to the mounting plate 31 and the support rod 32.

[0049] In one embodiment, the two support rods 32 are respectively connected to the first support frame 11 and the second support frame 21 at both ends, providing axial tightening forces from the upper and lower directions respectively to support the first support frame 11 and the second support frame 21, and tightly pressing the first gasket 14 and the second gasket 24 against the conical surface of the product nozzle 6 to achieve the stability of the working station.

[0050] In one embodiment, the first gasket 14 and the second gasket 24 are conical, and the surfaces of the first gasket 14 and the second gasket 24 are provided with knurling to ensure that the equipment does not slip during the processing. A universal joint is used between the first foot and the first adjusting stud 12, and between the second foot 23 and the second adjusting stud 22 to ensure that the legs can remain non-rotating when the stud is rotated, ensuring the working installation effect.

[0051] A usage method of an inner hole processing device applicable to a confined space, applicable to the above-mentioned inner hole processing device applicable to a confined space, includes the following steps:

[0052] S1: Install the fixed end of the tooling, the installation frame, and the adjustment end of the tooling. By adjusting the fixed end and the adjustment end of the tooling, the equipment is initially pressed against the inner wall of the nozzle, and at the same time, the equipment is initially aligned and initially centered.

[0053] S2: Provide axial tightening forces from the upper and lower directions respectively through the installation frame to ensure that the fixed end and the adjustment end of the tooling are tightly pressed against the inner wall of the nozzle.

[0054] S3: Install the reaming device, and perform fine adjustment through the centering device to make the center of the reaming device coaxial with the center of the inner hole of the nozzle to be processed.

[0055] S4: After the reaming device is tooled, process the surface to be processed.

[0056] S5: After the processing is completed, conduct an inspection. After there is no problem with the inspection, disassemble the equipment and clean the site.

[0057] In one embodiment, in step S3, a reamer is installed and finely adjusted by an aligning device so that the center of the reamer is concentric with the center of the inner hole to be machined; a tool holder is installed, and the tool holder is moved to the position to be machined, a cutting tool is installed, and the position of the cutting tool is adjusted manually for tool setting.

[0058] In one embodiment, in step S4, before machining, the surface to be machined is preliminarily machined, and the quality of the machined surface is observed. If the surface quality does not meet the standard, the problem is analyzed and solved for improvement; if the surface quality meets the standard, machining is carried out formally. The machined surface with Ra ≤ 6.3 μm meets the standard.

[0059] In one embodiment, in step S4, during machining,

[0060] For other contents of the inner hole machining equipment applicable to a confined space described in the present invention, reference may be made to the prior art and will not be elaborated herein.

[0061] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0063] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An internal hole processing device suitable for confined space, characterized in that: include: Fixture fixing end, fixture adjustment end, mounting frame, reaming device and centering device; The tool fixing end and the tool adjusting end are respectively located on two sides of the installation frame, and the tool fixing end and the tool adjusting end are connected to the top of the inner wall of the pipe; The reaming device is connected to the mounting frame through the centering device, and the center of the reaming device is coaxial with the center of the inner hole of the pipe to be processed; The reaming device is located at an end close to the adjusting end of the tooling.

2. The inner hole processing equipment suitable for confined space according to claim 1 is characterized in that: The reaming device comprises a reaming machine, a tool holder and a tool. The tool holder is fixedly connected to the output end of the reaming machine, and the tool holder is fixedly connected to the tool.

3. The inner hole processing equipment suitable for confined space according to claim 2 is characterized in that: The self-aligning device includes a base nut, a base screw, a self-aligning bracket, a self-aligning nut and a self-aligning screw. The base screw is connected to the reaming machine, the base nut is sleeved on the base screw, the base nut is abutted against the mounting frame, the self-aligning nut is sleeved on the self-aligning screw, the self-aligning screw passes through the self-aligning bracket and is connected to the reaming machine, and the self-aligning bracket is connected to the mounting frame.

4. The inner hole processing equipment suitable for confined space according to claim 1 is characterized in that: The mounting frame comprises a plurality of mounting plates and support rods, wherein the plurality of mounting plates are spliced ​​end to end, the mounting plates are connected to the reaming device via a centering device, and the two ends of the support rods are respectively fixedly connected to the tooling fixed end and the tooling adjustment end.

5. The inner hole processing equipment suitable for confined space according to claim 4, characterized in that: The fixed end of the tooling includes a first support frame, a first adjusting stud, a first support leg and a first gasket, the first support frame is connected to the first support leg through the first adjusting stud, the first gasket is fixedly connected to the first support leg, and the first support frame is fixedly connected to the mounting plate and the support rod.

6. The inner hole processing equipment suitable for confined space according to claim 5, characterized in that: The tooling adjustment end includes a second support frame, a second adjustment stud, a second support leg and a second gasket, the second support frame is connected to the second support leg through the second adjustment stud, the second gasket is fixedly connected to the second support leg, and the second support frame is fixedly connected to the mounting plate and the support rod.

7. The inner hole processing equipment suitable for confined space according to claim 6, characterized in that: The first gasket and the second gasket are conical, and the surfaces of the first gasket and the second gasket are provided with knurling.

8. The inner hole processing equipment suitable for confined space according to claim 2, characterized in that: The reamer is an 80 reamer, and the main shaft diameter of the reamer is 80 mm.

9. A method for using an inner hole processing device suitable for a confined space, applicable to the inner hole processing device suitable for a confined space as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Install the fixture fixing end, installation frame and fixture adjustment end. Adjust the fixture fixing end and fixture adjustment end to make the equipment initially press against the inner wall of the pipe, and at the same time initially align the equipment and perform initial centering. S2: Provide the axis support force from the upper and lower directions through the installation frame to ensure that the tooling fixed end and tooling adjustment end are tightly pressed against the inner wall of the pipe; S3: Install the reaming device and make fine adjustments through the centering device to make the center of the reaming device coaxial with the center of the inner hole of the pipe to be processed; S4: After the reaming device is set up, the surface to be processed is processed; S5: After processing is completed, disassemble the equipment.

10. The method for using the inner hole processing equipment suitable for confined space according to claim 9, characterized in that: In step S4, before processing, the surface to be processed is preliminarily processed to observe the quality of the processed surface. If the surface quality does not meet the standard, the problem is analyzed and improved; if the surface quality meets the standard, formal processing is carried out.

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