CN113878490A - In-situ grinding method for flange sealing surface and special grinding device thereof - Google Patents
In-situ grinding method for flange sealing surface and special grinding device thereof Download PDFInfo
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- CN113878490A CN113878490A CN202111164458.7A CN202111164458A CN113878490A CN 113878490 A CN113878490 A CN 113878490A CN 202111164458 A CN202111164458 A CN 202111164458A CN 113878490 A CN113878490 A CN 113878490A
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- 238000007789 sealing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 15
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005498 polishing Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 208000032170 Congenital Abnormalities Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 230000009191 jumping Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a flange sealing surface in-situ grinding method which comprises the following steps: 1) welding a grinding support base structure inside a sleeve with a flange at the end; 2) setting a supporting structure by taking the grinding supporting base structure as a base; 3) a grinding disc is arranged at the flange opening, and the upper surface of the grinding disc is a grinding surface which is in contact with the sealing surface of the flange; 4) a jacking mechanism is arranged at the lower side of the grinding disc to keep the friction force of the grinding disc to the sealing surface; 5) removing all the grinding devices after grinding; the invention also provides a special grinding device for the in-situ grinding method of the flange sealing surface, which comprises a base and a grinding disc, wherein the base comprises a fixed disc, and the center of the fixed disc is fixedly connected with a supporting rod; the fixed disc is arranged in the sleeve; the supporting rod extends outwards from the sleeve; the grinding disc is movably sleeved on the supporting rod and is arranged at the flange opening; the outer end of the supporting rod is provided with a pressure regulating tray, and a spring is arranged between the pressure regulating tray and the grinding disc; the outer side of the pressure regulating tray is provided with a locking nut, and flanges in any direction can be polished in situ.
Description
Technical Field
The invention relates to the technical field of flange repair, in particular to a flange sealing surface in-situ grinding method and a special grinding device thereof.
Background
Various high-temperature and high-pressure pipelines of a large-scale thermal power plant are distributed throughout the whole production process flow. The pipeline layout is complicated, the requirements on materials, installation and maintenance processes are high, especially in the flange connection installation process, if the contact area of the sealing surfaces of the two flanges cannot meet the strength requirement, leakage is easy to occur. The high-temperature and high-pressure medium suddenly leaks, and irreparable damage can be caused to surrounding personnel and equipment.
The problem of water leakage of a filter screen flange at the inlet of a steam feed pump in operation occurs for a plurality of times since the unit of a certain thermal power plant is in a supercritical parameter. The existing method for processing the problems is to eliminate the defects through measures such as load reduction of a unit, running of a reverse electric pump and the like, the method reduces economic benefits, and hidden dangers brought to work by leakage are not actually solved by reducing the load. Therefore, the root cause of the flange leakage needs to be found, a treatment scheme is made according to the actual situation of the field device, and the defect of the field device is completely eliminated. Through the measurement and inspection of the flange sealing surfaces, the effective contact surfaces of the flanges are opened from inside to outside to form a deformation gap of 0.20mm under the condition that the sealing gaskets are not arranged on the two sealing surfaces. According to the technical standard of the flange, the contact area is required to be more than 75%, the contact surface is measured by using red lead powder to be less than 15%, and due to the fact that the contact area is insufficient, the tightening force after the gasket is installed is insufficient, and the flange is the root cause of water leakage in operation.
The method for repairing the flange sealing surface parallelism deficiency at home and abroad basically adopts the grinding of the flange. At present, the grinding and repairing of the sealing surface basically adopts a mode of in-situ grinding or machining grinding, and the contact area of the two flanges is effectively improved after the flatness of the sealing surface is corrected. The prior art grinding apparatus generally includes a worktable for placing the flange, and the grinding head is moved above the worktable by the movable frame and lowered to the surface of the flange to perform grinding.
And for feed pump filter screen flange, because its flange arrangement mode, because its sealed face is downward, want to realize its grinding, can only cut off from the filter screen sleeve based on prior art flange, weld back sleeve tip after carrying out the machine tooling grinding again, this kind of modification operation must cause the filter screen sleeve to shorten, original filter screen can't use. The cost of manufacturing the filter screen again is high, the consumed time is huge, and the requirement of the construction period cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem that the sealing surface of a small-wind inverted flange plate at the water supply pump inlet is not in enough contact, so that the leakage of the flange position is caused in the running process of a unit.
The invention solves the problems and adopts the technical scheme that:
a flange sealing surface in-situ grinding method specifically comprises the following operations: 1) welding a grinding support base structure inside a sleeve with a flange at the end; 2) setting a supporting structure by taking the grinding supporting base structure as a base; 3) a grinding disc is arranged at the flange opening, and the upper surface of the grinding disc is a grinding surface which is in contact with the sealing surface of the flange; 4) a jacking mechanism is arranged on the lower side of the grinding disc, the relative pressure between the grinding disc and the flange is set through the jacking mechanism, and then the jacking mechanism is locked, so that the relative pressure between the grinding disc and the flange is maintained; 5) rotating the grinding disc to grind the sealing surface of the flange; 6) and taking down the jacking mechanism and the grinding disc after grinding is finished, and dismantling the grinding support base structure in the sleeve.
Compared with the prior art, the invention adopting the method has the beneficial effects that:
the method takes the pipeline of the flange as a supporting base for grinding work, and the grinding disc is suitable for the position installation of the flange, so that the position of the flange needs to be changed, the flange is convenient to repair and construct, and the repair cost is greatly reduced.
The invention also provides a special grinding device for the method, which comprises a base and a grinding disc, wherein the base comprises a fixed disc, and the center of the fixed disc is fixedly connected with a supporting rod; the fixed disc is arranged in the sleeve; the supporting rod extends outwards from the sleeve; the grinding disc is provided with a central hole, movably sleeved on the supporting rod and arranged at the flange opening; the outer end of the supporting rod is provided with a pressure regulating tray which is in threaded connection with the supporting rod; a spring is arranged between the pressure regulating tray and the grinding disc; the outer side of the pressure regulating tray is provided with a locking nut.
Compared with the prior art, the invention adopting the structure has the beneficial effects that:
aiming at the flange which can not move, the invention realizes the original position grinding of the flange, and compared with the prior art, the invention does not need to disassemble and assemble the flange, does not need to be welded and recovered, and saves a large amount of work. The grinding device is suitable for grinding the port flange arranged in any state, keeps the original position of the flange, has no damage to facilities needing to be repaired, has excellent repairing effect and greatly saves the maintenance cost.
Preferably, the above structure further comprises:
the middle of the upper side of the grinding disc is provided with a guide post which extends into the flange opening, and a gap of 0.2mm is arranged between the guide post and the flange. The guide post ensures the involution contact of the grinding surface and the sealing surface and avoids the large-amplitude vibration and deviation of the grinding disc.
A lever hole is formed in the edge of the lower surface of the grinding disc, and a short lever is detachably arranged in the lever hole; still be equipped with the rotation handle bar, rotate the handle bar and set up in the quarter butt left side and extend to the support column right side. This structure is through rotating the manual abrasive disk that makes of hand lever and rotating, and simple structure easily realizes, rotates the laborsaving lever structure of constitution of hand lever, uses manpower sparingly, and the flexibility ratio is high.
The peripheral circle of abrasive disc rigid coupling rack, rack and drive gear meshing, drive gear installs in the driving motor output. The structure is designed to drive the grinding disc to rotate by the motor, and the motor is convenient to assemble and can drive the grinding disc arranged in any direction and inclination angle.
The upper side of the pressure regulating tray is also provided with a first pressing sheet. This structure avoids pressure regulating tray surface and spring end to produce frictional resistance when multifrequency, fast rotation and makes the spring produce and twist reverse, beat, makes the spring only receive ascending extrusion force through first preforming.
A second pressing sheet is arranged between the grinding disc and the spring; the lower surface of the second pressing sheet is abutted against the spring, and lubricating oil is arranged between the upper surface of the second pressing sheet and the grinding disc. The second pressing sheet in the structure prevents the spring from twisting and jumping due to the contact friction between the spring end and the grinding disc in the rotating and grinding process of the grinding disc, so that the pressure of the spring and the grinding disc is unstable.
The pressure regulating tray is provided with a pressure regulating handle. The pressure regulating handle is convenient to operate, and the grinding force is regulated quickly and accurately.
The spring is a spiral spring sleeved on the support rod. The threaded spring is attached to the support rod, so that the support rod is convenient to mount, is not easy to fall off and does not occupy space.
Drawings
FIG. 1 is a schematic structural view of a polishing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic view of an improved structure of the polishing apparatus of the present invention.
FIG. 3 shows a structure of an embodiment of a polishing disk according to the present invention.
FIG. 4 shows a second embodiment of the polishing disk of the present invention.
FIG. 5 is a schematic view of a first embodiment of a polishing disk rotating structure according to the present invention.
Fig. 6 shows a second embodiment of the polishing disc rotating structure according to the present invention.
FIG. 7 is a reference view showing the arrangement of the polishing apparatus according to the present invention with the casing tilted.
In the figure: 1. a sleeve; 2. a flange; 3. a sealing surface; 4. fixing the disc; 5. a support bar; 6. a grinding disk; 6-1, grinding plate; 6-2, a guide post; 6-3, a rack; 6-4, short bar; 7. a spring; 8. a pressure regulating tray; 9. locking a nut; 10. a pressure regulating handle; 11. a second tabletting; 12. a first tablet; 13. a drive gear; 14. the handle is rotated.
Detailed Description
The invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
The invention researches the technical parameters of the water supply system equipment of the thermal power plant and the conditions of the processing and mounting process of the inverted flange of the filter screen at the inlet of the water supply pump and the equipment parameters in operation. The root cause of the leakage in the flange operation is found. A filter screen with the length of 1.3 is arranged in an inlet pipeline of the existing water pump, the filter screen is fixedly connected with a flange at the end part of the pipeline, the length of the pipeline is basically equal to that of the filter screen, and the length of the pipeline is 1.32 meters. If flange 2 is ground the restoration down by the cutting, welds the repacking again, pipeline length must receive very big loss, leads to the unable installation of filter screen. According to the actual condition of the equipment, the scheme for eliminating the congenital defects of the equipment is formulated by combining the force of the prior art and with the minimum investment, and the potential safety hazard of the leakage of the flange 2 is thoroughly eliminated.
This project is exactly in order to solve the sealed face 3 of current feed pump entry filter screen flange down, the problem of the design equipment of polishing of being not convenient for. The invention aims to achieve the following purposes: provided is a device capable of grinding a flange 2 set at any angle and direction, and grinding the flange 2 in situ without moving the flange 2. The flange 2 does not need to be disassembled, and the original facilities are not damaged.
The invention is implemented on the basis of a filter screen flange at the inlet of a feed pump, and innovates and researches the leakage reason and the processing method of a high-pressure flange plate, and specifically comprises the following steps:
1) water supply system equipment and medium technical parameters;
2) the process of the inverted flange processing and mounting of the filter screen at the inlet of the feed pump;
3) material and technological parameters of the sealing gasket;
4) searching the leakage reason of the sealing gasket;
5) research and development of special grinding tools suitable for field use.
The current filter screen flange sets up for invering, uses current machine of grinding to implement and polishes, and the key technology of solving above-mentioned problem lies in:
1) finding out the reason of flange leakage by a method of grinding the contact surface;
2) and developing a special tool.
Based on the design thought, the invention provides a flange sealing surface on-site grinding method, which comprises the following specific operations: 1) a grinding supporting base structure is welded inside a sleeve 1 with a flange 2 at the end part; 2) setting a supporting structure by taking the grinding supporting base structure as a base; 3) a grinding disc 6 is arranged at the flange opening, and the upper surface of the grinding disc 6 is a grinding surface which is contacted with the flange sealing surface 3; 4) a jacking mechanism is arranged on the lower side of the grinding disc 6, the relative pressure between the grinding disc 6 and the flange 2 is set through the jacking mechanism, and then the jacking mechanism is locked, so that the relative pressure between the grinding disc 6 and the flange 2 is maintained; 5) rotating the grinding disc 6 to grind the sealing surface 3 of the flange 2; 6) and taking down the jacking mechanism and the grinding disc 6 after grinding is finished, and removing the grinding support base structure in the sleeve 1.
When designing the grinder, according to the engineering embodiment, to the flange structure of on-spot feed pump inlet pipeline bottom, because the filter screen barrel is invert, flange 2 sealed face 3 is the lower surface. A grinding plate is arranged under the flange 2, and the surface above the grinding plate is ground. The grinding plate needs to have two upward forces to achieve enough pressure on the deformed flange 2, wherein the two upward forces are respectively a, and the two upward forces are used for overcoming the lifting force of the gravity of the grinding plate; b, pressure applied to the grinding plate during grinding.
The grinding disc 4 designed in the scheme is a T-shaped component, the horizontal part of the grinding disc is a grinding plate 6-1, and the periphery of the grinding plate 6-1 is a grinding surface attached to the sealing surface 3 of the flange 2; the diameter of a vertical part of the grinding plate is equal to the caliber of the flange 2, the vertical part extends upwards into the flange opening, the vertical part is a guide column 6-2 protruding upwards in the middle of the grinding plate 6-1, and the guide column 6-2 extends into the flange 2, so that the grinding plate 6 is prevented from shaking or deviating during high-speed rotation. In order to completely polish the sealing surface 3, the diameter of the grinding plate 6-1 is 600mm according to the size of the flange 2 on site, and the thickness of the processed grinding plate 6-1 is more than 30mm, so the total weight of the grinding disc 6 is about more than 30 jin. To counteract over 30 jin of gravity and generate a certain pressure on the surface of the flange 2, a supporting structure and a pressurizing structure must be designed for the grinding disc.
In order to implement the in-situ grinding method, the invention provides a special flange grinding device which can carry out in-situ grinding on the flange 2 arranged in any direction and at any angle. The specific structure is shown in figure 1: a kind of flange sealing surface grinder, including base and abrasive disc, the base includes the fixed disk 4, the centre of the fixed disk 4 is fixedly connected with the brace rod 5; the fixed disc 4 is arranged in the sleeve 1; the supporting rod 5 extends out of the sleeve 1; the grinding disc is provided with a central hole, movably sleeved on the support rod 5 and arranged at the flange opening; the outer end of the supporting rod 5 is provided with a pressure regulating tray which is in threaded connection with the supporting rod 5; a spring is arranged between the pressure regulating tray and the grinding disc; the outer side of the pressure regulating tray is provided with a locking nut.
The grinding device is characterized in that a positioning bracket is welded at the center of the inner diameter of a filter screen cylinder, and the positioning bracket is used as a base for mounting a grinding disc and other grinding parts. The base can be a disc or a frame. The upper portion of the supporting rod 5 is a smooth outer wall, so that the grinding disc can rotate conveniently, and if a spring sleeved on the supporting rod 5 is adopted, friction damage of the spring and the surface of the supporting rod 5 can be effectively reduced. The lower part of the supporting rod 5 is provided with an external thread, the pressure regulating tray is arranged on the external thread part, and the pressure of the pressure regulating tray on the spring is adjusted by rotating the pressure regulating tray.
The middle of the upper side of the grinding disc is provided with a guide post which extends into the opening of the flange 2, and a gap of 0.20mm is arranged between the guide post and the flange 2. The side wall of the guide column is made of metal materials, the surface is smooth, and the structure is only responsible for avoiding deviation and does not have a polishing function. As shown in fig. 2, the abrasive disk provides two configurations: firstly, combining with a figure 3, a guide post is a central steel sleeve 1 and is sleeved on a support rod 5, a grinding plate 6-1 is annular and is fixedly connected with the steel sleeve 1 in a matching way, and the periphery of the grinding plate is in contact with a flange sealing surface 3 and is ground; secondly, with reference to fig. 4, the guide post 6-2 is a steel sleeve sleeved on the vertical part of the grinding disc.
For the rotation of the grinding disk 6, the invention provides two embodiments: referring to fig. 5, a lever hole is formed in the edge of the lower surface of the grinding disc 6, and a short lever 6-4 is detachably arranged in the lever hole; a turning handle bar 14 is also provided, the turning handle bar 14 being arranged on the left side of the short bar 6-4 and extending to the right side of the support bar 5. This embodiment manually pushes the grinding disc to rotate by a lever structure. The supporting rod 5 is a fulcrum of the rotating hand rod, the short rod 6-4 is regarded as the grinding disc, and the longer the outer end of the rotating hand rod is, the more labor is saved during pushing. And secondly, referring to fig. 6 and 7, a rack 6-3 is fixedly connected to the periphery of the grinding disc, the rack 6-3 is meshed with a driving gear, and the driving gear is arranged at the output end of a driving motor. This embodiment passes through motor drive abrasive disc, and motor, drive gear all can be the structure of convenient dismouting, mesh on rack 6-3 during the grinding.
Considering the elastic force of the spring, after the spring is subjected to certain pressure, the support force of the spring is influenced by the twisting and rotation of the upper end and the lower end. The upper side of the pressure regulating tray is also provided with a first pressing sheet. Further, a second pressing sheet is arranged between the grinding disc and the spring; the lower surface of the second pressing sheet is abutted against the spring, and lubricating oil is arranged between the upper surface of the second pressing sheet and the grinding disc. The structure avoids unstable thrust of the spring, the spring only applies compression force to the grinding disc, and the twisting generated by the friction between the end part of the spring and the pressing sheet is eliminated by the pressing sheet.
The pressure regulating tray is provided with a pressure regulating handle. The position of the pressure regulating tray is convenient to adjust.
The spring is a spiral spring sleeved on the support rod 5. The spiral spring is not easy to fall off, the use is safe, and the space is not occupied.
According to the grinding device provided by the invention, the gauze of 100# is upgraded to 800# in the grinding process of the grinding disc. During grinding, the pressure regulating tray and the spring are utilized to increase the friction force between the grinding disc and the flange 2. The ground flange is smooth and flat, and the contact of the circumferential plane reaches more than 95%. The smooth finish can reach more than 1.6, and the deformation of 0.20mm opening between the flanges is thoroughly eliminated.
The invention not only fundamentally solves the problem of leakage of the inverted sealing surface, but also solves the problem that the length of the sleeve 1 is consumed by the reinstallation welding of flange cutting compared with the prior art. The defect processing time is shortened.
Referring to fig. 1, 2 and 7, the invention takes the sleeve 1 as the foundation of the device installation, not only suitable for the grinding of the flange arranged at the lower end of the vertical pipeline, but also suitable for the grinding of the flanges at the end parts of the pipeline which is horizontally arranged and the pipeline which is obliquely arranged.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (10)
1. A flange sealing surface in-situ grinding method is characterized in that: the specific operation is as follows: 1) welding a grinding support base structure inside a sleeve with a flange at the end; 2) setting a supporting structure by taking the grinding supporting base structure as a base; 3) a grinding disc is arranged at the flange opening, and the upper surface of the grinding disc is a grinding surface which is in contact with the sealing surface of the flange; 4) a jacking mechanism is arranged on the lower side of the grinding disc, the relative pressure between the grinding disc and the flange is set through the jacking mechanism, and then the jacking mechanism is locked, so that the relative pressure between the grinding disc and the flange is fixed; 5) rotating the grinding disc to grind the sealing surface of the flange; 6) and taking down the jacking mechanism and the grinding disc after grinding is finished, and dismantling the grinding support base structure in the sleeve.
2. The special grinding device for realizing the in-situ grinding method of the flange sealing surface according to claim 1 comprises a base and a grinding disc, and is characterized in that: the base comprises a fixed disc, and the center of the fixed disc is fixedly connected with a supporting rod; the fixed disc is arranged in the sleeve, and the supporting rod extends out of the sleeve; the grinding disc is provided with a central hole, movably sleeved on the supporting rod and arranged at the flange opening; the outer end of the supporting rod is provided with a pressure regulating tray which is in threaded connection with the supporting rod; a spring is arranged between the pressure regulating tray and the grinding disc; the outer side of the pressure regulating tray is provided with a locking nut.
3. The special grinding device for the in-situ grinding method of the flange sealing surface according to claim 2 is characterized in that: the middle of the upper side of the grinding disc is provided with a guide post which extends into the flange opening, and a gap of 0.20mm is arranged between the guide post and the flange.
4. A special grinding device for the in-situ grinding method of the sealing surface of the flange according to claim 3, wherein: a lever hole is formed in the edge of the lower surface of the grinding disc, and a short lever is detachably arranged in the lever hole; still be equipped with the rotation handle bar, rotate the handle bar and set up in the quarter butt left side and extend to the support column right side.
5. A special grinding device for the in-situ grinding method of the sealing surface of the flange according to claim 3, wherein: the peripheral circle of abrasive disc rigid coupling rack, rack and drive gear meshing, drive gear installs in the driving motor output.
6. A special grinding device for the in-situ grinding method of the flange sealing surface according to claim 4 or 5, wherein: the upper side of the pressure regulating tray is also provided with a first pressing sheet.
7. A special grinding device for the in-situ grinding method of the sealing surface of the flange according to claim 6, wherein: a second pressing sheet is arranged between the grinding disc and the spring; the lower surface of the second pressing sheet is abutted against the spring, and lubricating oil is arranged between the upper surface of the second pressing sheet and the grinding disc.
8. The special grinding device for the in-situ grinding method of the flange sealing surface according to claim 2 is characterized in that: the pressure regulating tray is provided with a pressure regulating handle.
9. The special grinding device for the in-situ grinding method of the flange sealing surface according to claim 2 is characterized in that: the spring is a spiral spring sleeved on the support rod.
10. The special grinding device for the in-situ grinding method of the flange sealing surface according to claim 2 is characterized in that: the part of the supporting rod sleeved with the grinding disc and the spring is a smooth outer wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111164458.7A CN113878490A (en) | 2021-09-30 | 2021-09-30 | In-situ grinding method for flange sealing surface and special grinding device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111164458.7A CN113878490A (en) | 2021-09-30 | 2021-09-30 | In-situ grinding method for flange sealing surface and special grinding device thereof |
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| CN113878490A true CN113878490A (en) | 2022-01-04 |
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| CN204053747U (en) * | 2014-08-28 | 2014-12-31 | 贵州赤天化正泰工程有限责任公司 | The online prosthetic device of flange sealing surface |
| CN204221551U (en) * | 2014-10-20 | 2015-03-25 | 上海希希埃动力控制设备有限公司 | Grinding device for sealing surface of valve base |
| CN204450176U (en) * | 2015-02-13 | 2015-07-08 | 大唐呼图壁能源开发有限公司热电厂 | Hp and lp bypass valve grinding tackling |
| CN204470609U (en) * | 2015-01-28 | 2015-07-15 | 石家庄海鸿重工机械制造有限公司 | Big Diameter Flange class part seal face trimming device |
| CN205870258U (en) * | 2016-06-29 | 2017-01-11 | 大唐长春第二热电有限责任公司 | Turning of disk seat manual -automatic , grinder |
| CN106514483A (en) * | 2016-11-11 | 2017-03-22 | 中国石油天然气第建设有限公司 | Tool for fixing grinding ring for high-pressure flange sealing face |
| CN208147612U (en) * | 2018-05-19 | 2018-11-27 | 新疆汇翔激光科技有限公司 | Heavy-oil hydrogenation reactor tower tray sealing surface grinds prosthetic device |
| CN213004352U (en) * | 2020-09-19 | 2021-04-20 | 山东黄河新材料科技有限公司 | Lens pad flange sealing surface grinding device |
| CN213054314U (en) * | 2020-09-03 | 2021-04-27 | 河南熔金新材料有限公司 | Novel mill with carbide abrasive brick |
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2021
- 2021-09-30 CN CN202111164458.7A patent/CN113878490A/en active Pending
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| CN213054314U (en) * | 2020-09-03 | 2021-04-27 | 河南熔金新材料有限公司 | Novel mill with carbide abrasive brick |
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