CN109719589B - Grinding and repairing device for sealing surface of safety valve - Google Patents
Grinding and repairing device for sealing surface of safety valve Download PDFInfo
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- CN109719589B CN109719589B CN201811562333.8A CN201811562333A CN109719589B CN 109719589 B CN109719589 B CN 109719589B CN 201811562333 A CN201811562333 A CN 201811562333A CN 109719589 B CN109719589 B CN 109719589B
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Abstract
The invention discloses a grinding and repairing device for a sealing surface of a safety valve, and belongs to the technical field of manufacturing of safety valves for oil-gas wells. The grinding repair device comprises a fixing mechanism for fixing the valve plate, the fixing mechanism comprises an outer barrel and a centering shaft arranged in the outer barrel in a penetrating mode, the centering shaft is screwed on the outer barrel through threads, and the end portion of the centering shaft is connected with a magnet used for adsorbing the valve plate. The embodiment of the invention provides a novel grinding and repairing device for a sealing surface of a safety valve, which is simple in structure and low in cost, realizes automatic grinding, reduces the grinding cost and improves the grinding efficiency.
Description
Technical Field
The invention relates to the technical field of manufacturing of safety valves for oil and gas wells, in particular to a grinding and repairing device for a sealing surface of a safety valve.
Background
The underground safety valve for the oil-gas well is mainly used for realizing flow control of underground crude oil. When the well kick happens underground, the safety valve is automatically closed, so that accidents are prevented. The valve plate and the valve seat of the safety valve are key parts for ensuring the sealing of the safety valve. At present, the sealing surface between a valve plate and a valve seat of a safety valve is mainly repaired in three modes, namely manual grinding, semi-automatic grinding and full-automatic grinding. The manual grinding has low cost and high use frequency, but is time-consuming and labor-consuming; the semi-automatic grinding adopts a handheld grinding tool, the valve body rotates, the working efficiency is improved, but the processing quality of the valve plate and the valve seat is greatly influenced by human factors; the full-automatic grinding machine has higher operation cost. These have limited the use of downhole safety valves for oil and gas wells that require high precision in sealing surface machining.
At present, how to implement the research and repair of the sealing surface of the safety valve with low cost and high efficiency becomes a key technology in the field of safety valve processing and manufacturing.
Disclosure of Invention
The embodiment of the invention aims to provide a grinding and repairing device for a sealing surface of a safety valve, so that the sealing surface of the safety valve can be automatically ground, the grinding cost is reduced, and the grinding efficiency is improved.
In order to solve the technical problem, an embodiment of the present invention provides a grinding repair device for a sealing surface of a safety valve, which is characterized by including a fixing mechanism for fixing a valve plate, where the fixing mechanism includes an outer cylinder and a centering shaft penetrating the outer cylinder, the centering shaft is screwed on the outer cylinder through a thread, and an end of the centering shaft is connected with a magnet for adsorbing the valve plate.
Optionally, the end of the centering shaft is connected to the magnet by a compressible resilient member.
Optionally, a boss protruding towards the magnet is arranged at an end of the centering shaft, and the elastic component is sleeved on the boss.
Optionally, an axially extending through hole is formed in the centering shaft, the grinding repair device further comprises a centering rod arranged in the through hole in a penetrating manner, one end of the centering rod, which faces the magnet, is fixedly connected with the magnet, and a fine adjustment structure for adjusting the radial position of the centering rod in the through hole is arranged on the centering shaft.
Optionally, the fine adjustment structure comprises an adjustment hole arranged on the centering shaft and an adjustment screw screwed in the adjustment hole and abutting against the outer wall of the centering rod, and the radial position of the centering rod in the through hole is adjusted by adjusting the depth of the adjustment screw in the adjustment hole.
Optionally, one end of the centering rod, which is far away from the magnet, is provided with a limiting cap.
Optionally, the fixing mechanism further comprises a positioning block arranged on the outer wall of the outer barrel and used for positioning the valve plate.
Optionally, the fixing mechanism further includes an end cover for fixing the fixing mechanism on an external fixture, the end cover is sleeved outside the centering shaft, the end cover has a clamping portion for clamping the external fixture and a flange portion located at the clamping portion and close to the outer cylinder, and the flange portion is fixedly connected with the outer cylinder.
Optionally, the outer cylinder is provided with a wire hole, and an electric cable for supplying power to the magnet is connected to the magnet through the wire hole.
Optionally, the grinding repair device further comprises a rotating mechanism for driving the valve seat to rotate, the first sealing surface on the valve plate is in matching contact with the second sealing surface on the valve seat, and the rotating mechanism drives the valve seat to rotate so that the second sealing surface and the first sealing surface grind.
The grinding and repairing device for the sealing surface of the safety valve provided by the embodiment of the invention has the advantages of simple structure and low cost, realizes automatic grinding, reduces the grinding cost and improves the grinding efficiency.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural view of a grinding and repairing device for a sealing surface of a safety valve according to an embodiment of the present invention;
FIG. 2 is a left side schematic view of FIG. 1;
fig. 3 is a perspective view of the abrasive repair device shown in fig. 1.
Description of reference numerals:
1-valve seat; 2-a valve plate; 3, an outer cylinder;
4-a magnet; 5, centering a shaft; 6-an elastic component;
7-centering rod; 8-fastening screws; 9-a limit cap;
10-an elastic gasket; 11-end cap; 12-adjusting screws;
13-positioning block; 14 — a first sealing surface; 21 — a second sealing surface;
51-a boss; 71-through hole 72-adjusting hole;
111-a clamping part; 112-flange portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The technical contents of the present invention will be described in detail by specific embodiments.
Fig. 1 is a schematic structural view of a grinding repair device for a sealing surface of a safety valve according to an embodiment of the present invention. Fig. 2 is a left side view of fig. 1, and fig. 3 is an axial side view of the abrasive repair device shown in fig. 1. As shown in fig. 1, the grinding restoration device for the sealing surface of the safety valve includes a fixing mechanism for fixing the valve plate 2. The fixing mechanism includes an outer cylinder 3 and a centering shaft 5. A through mounting hole is axially formed in the outer cylinder 3, the centering shaft 5 penetrates through the mounting hole, and the centering shaft 5 is screwed and connected with the mounting hole through threads. The lower end of the centering shaft 5 is connected with a magnet 4, and the magnet 4 is used for adsorbing the valve plate 2. In order to prevent the outer cylinder 3 from interfering with the valve plate 2, the lower end surface of the magnet 4 for attracting the valve plate 2 protrudes from the lower end surface of the outer cylinder 3. The distance between the lower end surface of the magnet 4 and the lower end surface of the outer tube 3 may be 2mm to 3mm, and in the present embodiment, the distance between the lower end surface of the magnet 4 and the lower end surface of the outer tube 3 is 2.5 mm. The abrasive repair device further comprises a rotation mechanism (not shown in the figures) for driving the valve seat 1 to rotate. When the grinding repair device grinds the valve plate 2 and the valve seat 1, the second sealing surface 21 on the valve plate 2 is in matching contact with the first sealing surface 14 on the valve seat 1, and the rotating mechanism drives the valve seat 1 to rotate so that the first sealing surface 14 and the second sealing surface 21 are mutually ground.
The embodiment of the invention provides a novel grinding and repairing device for a sealing surface of a safety valve, which is simple in structure and low in cost, realizes automatic grinding, reduces the grinding cost and improves the grinding efficiency.
The rotation mechanism may comprise a motor. The valve seat 1 is cylindrical, the valve seat 1 can be fixed on a rotating shaft of the motor through the inner hole wall of the valve seat 1, and when the motor rotates, the motor can drive the valve seat 1 to rotate.
In order to ensure the accuracy of the attraction position of the valve plate 2 on the magnet 4, a limiting structure for limiting the attraction position of the magnet 4 may be provided on the magnet 4. For example, the surface of the magnet 4 for adsorbing the valve plate 2 is provided with a protrusion matching with the groove on the valve plate 2, and the specific arrangement mode and structure of the limiting structure can be determined according to actual needs. It will be readily appreciated that a plurality of defining formations may also be provided, whereby the plurality of defining formations cooperate to define the circumferential position of the valve plate 2, avoiding circumferential deflection of the valve plate 2 under abrasive forces.
In order to facilitate the disassembly and assembly of the valve plate 2, the positioning block 13 is detachably connected to the outer cylinder 3, so that when the valve plate 2 needs to be disassembled and assembled, the positioning block 13 can be disassembled, and after the valve plate 2 is disassembled and assembled, the positioning block 13 is installed on the outer cylinder 3.
As shown in fig. 1, the lower end of the centering shaft 5 is connected to the magnet 4 through a compressible elastic member 6. The compressible resilient member 6 may comprise a compressible spring. The vertical position of the centering shaft 5 relative to the outer cylinder 3 can be adjusted by screwing the centering shaft 5, so that the compression amount of the compressible elastic part 6 is adjusted, the contact force between the valve plate 2 and the valve seat 1 is adjusted, the grinding friction force is controllable, and the grinding quality and effect can be improved.
In this embodiment, an elastic pad 10 is further disposed between the compressible elastic member 6 and the magnet 4.
As shown in fig. 1, the end of the centering shaft 5 connected to the magnet is provided with a boss 51 protruding toward the magnet 4, and the elastic member 6 is fitted over the boss 51. The boss 51 can provide a guiding effect for the up-and-down movement of the elastic component 6, and the balance of the force exerted on the magnet 4 by the elastic component 6 in the circumferential direction is ensured, so that the balance of the grinding friction force between the valve plate 2 and the valve seat 1 is ensured, and the grinding effect is improved.
In this embodiment, the fixing mechanism further comprises a centering bar 7, as shown in fig. 1. The centering shaft 5 is provided with an axially extending through hole 71, and the centering rod 7 is inserted into the through hole 71. The lower end (the end facing the magnet 4) of the centering rod 7 is fixedly connected to the magnet 4 by a screw. The upper part of the centering shaft 5 is provided with a fine adjustment structure. The fine adjustment structure includes an adjustment hole 72 and an adjustment screw 12. The adjustment hole 72 is provided on the spindle 5 in the radial direction, and the adjustment hole 72 extends from the outer peripheral wall of the spindle 5 up to the through hole 71. The adjustment hole 72 is an internally threaded hole, and the adjustment screw 12 is screwed into the adjustment hole 72. The inner end of the adjusting screw 12 abuts against the outer peripheral wall of the lower centering rod 7, and the plurality of fine adjustment structures cooperate with each other to fix the radial position of the centering rod 7 within the through hole 71. The radial position of the centering rod 7 in the through hole 71 is adjusted by adjusting the depth of the adjusting screw 12 in the adjusting hole 72.
During grinding, when the second sealing surface 21 on the valve plate 2 and the first sealing surface 14 on the valve seat 1 have radial deviation, the radial position of the centering rod 7 in the through hole 71 can be adjusted through the fine adjustment structure, so that the position of the magnet 4 is adjusted, the second sealing surface 21 and the first sealing surface 14 are kept matched, and the grinding quality and precision are guaranteed. In addition, the fine adjustment structure fixes the centering rod 7, provides upward pulling force for the magnet 4, and is matched with the compressible elastic component 6 providing downward pressure for the magnet 4, so that the magnet 4 is kept at a fixed position, and the position stability of the valve plate 2 is ensured.
The fine-tuning structures can be uniformly arranged along the circumferential direction of the centering rod 7, and the specific number of the fine-tuning structures can be determined according to actual needs.
As shown in fig. 1, a limiting cap 9 is arranged at one end of the centering rod 7 far away from the magnet 4. The limiting cap 9 can prevent the centering rod 7 from falling off from the through hole 71 accidentally, so that the magnet 4 can be prevented from being separated from the elastic component 6 accidentally, and the overall structure of the grinding and repairing device is protected. In this embodiment, the stop cap 9 may include a nut, and an external thread matching with the nut is provided at the top end of the centering rod 7, and the nut is screwed on the top end of the centering rod 7.
It is easily understood that, in order to prevent the influence of human factors during the polishing process, it is necessary to fix the valve plate 2 by fixing the entire fixing mechanism to the jig during the polishing. In order to fix the fixing mechanism on the clamp as a whole, as shown in fig. 1, the fixing mechanism further includes an end cap 11 for fixing the whole fixing mechanism on the external clamp, and the end cap 11 is fitted over the centering shaft 5. The end cap 11 is located above the outer cylinder 3. The cap 11 has a grip portion 111 for gripping by an external jig and a flange portion 112 located near the outer cylinder 3 of the grip portion 111. The flange 112 is fixedly connected to the outer cylinder 3 by a fastening screw 8. With this structure, the entire fixing mechanism can be fixed to the outer holder through the end cover 11, thereby fixing the valve plate 2.
In order to facilitate the removal and installation of the valve plate 2, in the present embodiment, as shown in fig. 3, the outer cylinder 3 is provided with a wiring hole through which an electric cable for supplying power to the magnet 4 is connected to the magnet 4. When the electric cable supplies power to the magnet 4, the magnet 4 has magnetism, and when the electric cable stops supplying power to the magnet 4, the magnetism of the magnet 4 disappears, so that the valve plate 2 is conveniently separated from the magnet 4.
The grinding repair device provided by the embodiment of the invention has the following use process:
clamping the fixture to an external fixture through end cap 11;
electrifying the magnet 4 through an electric cable, enabling the magnet 4 to generate magnetism, adsorbing and fixing the valve plate 2 on the magnet 4, and circumferentially positioning the valve plate 2 by using the positioning block 13;
the valve seat 1 is fixed on the rotating mechanism, the second sealing surface of the valve plate 2 is in matched contact with the first sealing surface of the valve seat 1 by adjusting the fine adjustment structure, and the grinding friction force can be adjusted by adjusting the centering shaft 5;
starting the rotating mechanism to start grinding.
In the description of the embodiments of the present invention, it should be understood that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The grinding repair device for the sealing surface of the safety valve is characterized by comprising a fixing mechanism for fixing a valve plate, wherein the fixing mechanism comprises an outer cylinder and a centering shaft penetrating into the outer cylinder, the centering shaft is screwed on the outer cylinder through threads, and the end part of the centering shaft is connected with a magnet for adsorbing the valve plate;
the grinding and repairing device comprises a centering shaft, a magnet and a grinding wheel, wherein the centering shaft is provided with an axially extending through hole, the grinding and repairing device further comprises a centering rod arranged in the through hole in a penetrating mode, one end, facing the magnet, of the centering rod is fixedly connected with the magnet, and the centering shaft is provided with a fine adjustment structure used for adjusting the radial position of the centering rod in the through hole.
2. The abrasive repair device of claim 1, wherein an end of said centering shaft is connected to said magnet by a compressible resilient member.
3. The abrasive repair device according to claim 2, wherein a boss protruding toward the magnet is provided at an end of the centering shaft, and the elastic member is fitted over the boss.
4. The abrasive repair device of claim 1, wherein the fine adjustment structure includes an adjustment hole disposed in the centering shaft and an adjustment screw threaded in the adjustment hole and abutting against an outer wall of the centering rod, wherein adjusting a depth of the adjustment screw in the adjustment hole adjusts a radial position of the centering rod in the through hole.
5. The abrasive repair device of claim 1, wherein an end of the centering rod distal from the magnet is provided with a stop cap.
6. The abrasive repair device of claim 1, wherein the securing mechanism further comprises a locating block disposed on an outer wall of the outer barrel for locating a valve plate.
7. The abrasive repair device according to claim 1, wherein the fixing means further comprises an end cap for fixing the fixing means to an external jig, the end cap being fitted around the outside of the centering shaft, the end cap having a clamping portion for clamping by the external jig and a flange portion located at the clamping portion and adjacent to the outer cylinder, the flange portion being fixedly connected to the outer cylinder.
8. The abrasive repair device according to claim 1, wherein said outer cylinder is provided with a wire hole through which an electric cable for supplying power to said magnet is connected to said magnet.
9. The abrasive repair device of claim 1, further comprising a rotation mechanism for driving the valve seat in rotation, the first sealing surface on the valve plate in mating contact with the second sealing surface on the valve seat, the rotation mechanism driving the valve seat in rotation such that the second sealing surface and the first sealing surface abrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811562333.8A CN109719589B (en) | 2018-12-20 | 2018-12-20 | Grinding and repairing device for sealing surface of safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811562333.8A CN109719589B (en) | 2018-12-20 | 2018-12-20 | Grinding and repairing device for sealing surface of safety valve |
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| Publication Number | Publication Date |
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| CN109719589A CN109719589A (en) | 2019-05-07 |
| CN109719589B true CN109719589B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811562333.8A Active CN109719589B (en) | 2018-12-20 | 2018-12-20 | Grinding and repairing device for sealing surface of safety valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561266B (en) * | 2019-10-09 | 2024-07-23 | 无锡威孚马山油泵油嘴有限公司 | Valve core lapping fixture |
| CN111021947B (en) * | 2019-12-02 | 2022-02-08 | 中国石油集团西部钻探工程有限公司 | Rotary impact tool |
| CN113021158B (en) * | 2019-12-09 | 2022-03-08 | 中国科学院大连化学物理研究所 | Axial floating polishing device for tail end of industrial robot |
| CN114888713B (en) * | 2022-05-20 | 2023-09-05 | 浙江合达铝业有限公司 | Grinding mechanism for air hole seat surface of end cover of diesel engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201913537U (en) * | 2010-12-07 | 2011-08-03 | 上海诺玛液压系统有限公司 | Tool for grinding seal surface |
| CN102896569B (en) * | 2012-09-26 | 2015-03-25 | 江苏兴亚船用阀门有限公司 | Grinder for machining sealing surface of valve body |
| CN103962934A (en) * | 2013-01-25 | 2014-08-06 | 上海浦东汉威阀门有限公司 | Valve sealing surface grinding miller |
| CN203293004U (en) * | 2013-06-14 | 2013-11-20 | 武汉钢铁(集团)公司 | Clamp for grinding electrochemistry sample |
| CN203463071U (en) * | 2013-08-30 | 2014-03-05 | 湖南唯科拓石油科技服务有限公司 | Valve plate structure for underground safety valve |
| CN204430997U (en) * | 2015-02-07 | 2015-07-01 | 浙江商业职业技术学院 | A kind of novel valve device for grinding sealing face |
| JP5881884B1 (en) * | 2015-06-16 | 2016-03-09 | 三菱日立パワーシステムズ株式会社 | Valve seat processing machine and valve seat processing method using the valve seat processing machine |
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