Sealing surface grinding device for machining subsurface safety valve

Abstract

The invention discloses a sealing surface grinding device for subsurface safety valve machining, and belongs to the technical field of safety valve machining, the sealing surface grinding device comprises a supporting seat, a grinding swing structure is arranged on the supporting seat, and the grinding swing structure can drive the subsurface safety valve to move; a grinding limiting structure for limiting and fixing the subsurface safety valve is arranged on the grinding swing structure, a grinding lifting structure for lifting the subsurface safety valve is arranged on the grinding limiting structure, and the grinding lifting structure is in sliding fit with the grinding limiting structure. A grinding rotating structure used for grinding the subsurface safety valve is arranged beside the supporting base, an automatic grinding head is arranged on the grinding rotating structure, and the grinding rotating structure can drive the automatic grinding head to move. According to the grinding device, grinding operation on the horizontal end face and the inclined end face of the safety valve can be achieved, and therefore grinding comprehensiveness of the safety valve is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of safety valve processing, and in particular relates to a sealing surface grinding device for processing underground safety valves. Background Art

[0002] The downhole safety valve is a safety device specially designed for oil and gas wells. Its main function is to close the valve in an emergency to prevent blowouts in abnormal situations such as fire, pipeline rupture, and irresistible natural disasters (such as earthquakes, hail, and strong typhoons) in production facilities, thereby protecting the safety of oil and gas wells and production facilities. In offshore operations, this valve is also called a subsea safety valve.

[0003] Downhole safety valves can be divided into ground control and downhole control according to different control methods. According to different recovery methods, they can be divided into tubing recovery type and wire recovery type. In addition, downhole safety valves can also be divided into lifting rod type, ball valve type and valve plate type according to their structures. At present, the main research and application are tubing recovery type and valve plate type ground control downhole safety valves.

[0004] In the process of machining the end face of the safety valve, only the horizontal end face of the safety valve can be ground. However, in the actual production process of the safety valve, there will be an inclined surface or an inclined end face at the end of the water surface. When grinding the safety valve facing the inclined surface, it cannot be adjusted according to the needs of grinding the inclined surface, resulting in incomplete grinding of the safety valve, which affects the subsequent processing of the safety valve. Summary of the invention

[0005] The embodiment of the present invention provides a sealing surface grinding device for machining a downhole safety valve to solve the problems in the prior art.

[0006] The embodiment of the present invention adopts the following technical scheme: a sealing surface grinding device for processing a downhole safety valve, comprising a support seat, a grinding swinging structure is provided on the support seat, the grinding swinging structure can drive the position of the downhole safety valve to move, the grinding swinging structure is provided with a grinding limiting structure for limiting and fixing the downhole safety valve, the grinding limiting structure is provided with a grinding lifting structure for lifting the downhole safety valve, the grinding lifting structure and the grinding limiting structure are slidably matched, a grinding rotating structure for grinding the downhole safety valve is provided on the side of the support seat, an automatic grinding head is provided on the grinding rotating structure, and the grinding rotating structure can drive the position of the automatic grinding head to move.

[0007] During the grinding process, the position of the automatic grinding head can be driven down by the grinding rotating structure according to the burrs on the horizontal end face or the inclined end face or the thickness that needs to be ground, so that the grinding on the end face is in the best state.

[0008] Furthermore, the grinding swing structure includes a swing motor, which is located on a support seat, a rotating plate is provided on the main shaft of the swing motor, a rotating plate is provided on the rotating plate, a rotating shaft is arranged obliquely thereto, a rotating frame is provided on the support seat and connected to the rotating frame for rotation, a horizontal rotating shaft is provided on the rotating frame, the rotating shaft is rotatably connected to the rotating frame, a vertically arranged rotating shaft is provided on the rotating shaft, and the bottom of the rotating shaft is connected to the top of the rotating shaft.

[0009] During the grinding process of the inclined end face or end face of the safety valve, the position of the safety valve can be driven to swing and sway, so that the safety valve is in the best and most suitable position. The automatic grinding head is located in the position to grind the inclined face or end face of the safety valve.

[0010] Furthermore, the grinding limit structure includes a mounting frame arranged at the top of the rotating shaft, a bidirectional screw slide is arranged in the mounting frame, two limit blocks are respectively arranged on the two moving ends of the bidirectional screw slide, three compression dampers connected to the limit blocks are arranged at equal intervals, and an arc limit block is arranged at the other end of the three compression dampers, and a horizontally arranged load-bearing arc plate is arranged on the arc limit block. This prevents the position of the safety valve from being offset and changing during the grinding process of the safety valve, which affects the accuracy of the safety valve processing.

[0011] Furthermore, the grinding lifting structure includes a horizontally arranged lifting plate, two lifting electric cylinders are respectively provided at both ends of the bottom of the lifting plate, the two lifting electric cylinders are symmetrically arranged on the top of the mounting frame, and two sliding rods are respectively provided at both ends of the bottom of the lifting plate, and the sliding rods are slidably matched with the mounting frame.

[0012] By moving the lifting plate upward, the safety valve can be driven to move upward, thereby realizing the movement of the material discharge of the safety valve after grinding.

[0013] Furthermore, the grinding and lifting structure also includes a rotating motor, which is located at the bottom of the lifting plate. A rotating disk is provided on the main shaft of the rotating motor, and the rotating disk is rotatably connected to the lifting plate.

[0014] Furthermore, the grinding rotating structure comprises a support frame, the top of the support frame extends to above the two arc-shaped limit blocks, and the grinding moving structure is provided on the support frame.

[0015] Furthermore, the grinding moving structure includes a moving screw and a moving rod, the moving screw is rotatably connected to a support frame, the support frame is provided with a moving motor that is transmission-connected to the moving screw, the moving rod and the moving screw are symmetrically arranged on the support frame, the moving screw is provided with a moving block that is slidably matched with the moving screw, and the moving block is slidably matched with the moving rod. The grinding operation can be performed on various positions on the sealing surface of the safety valve, and the comprehensive grinding operation of the safety valve can be achieved by moving in the diameter direction of the safety valve.

[0016] Furthermore, the grinding moving structure includes a rotating motor arranged on a moving block, a rotating disk is arranged on the main shaft of the rotating motor, a moving slot is arranged on the moving block, two vertically symmetrical slide rails are arranged in the moving slot, a lifting seat is arranged on the two slide rails to slide with them, a hinged plate is arranged between the lifting seat and the rotating disk, and the automatic grinding head is located in the lifting seat. The grinding thickness of the safety valve can be adjusted according to the grinding needs.

[0017] Furthermore, a scale is provided on the slide rail.

[0018] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0019] Firstly, when the safety valve is ground, the present invention can drive the rotating disk to rotate by the rotating motor, and the position of the hinged plate can be driven to rotate. The rotation of the hinged plate can make the lifting seat move up and down on the two slide rails, so that the position of the lifting seat moves downward and drives the position of the automatic grinding head to move downward. In the process of grinding the safety valve, firstly, the position can be adjusted according to the thickness of the safety valve to be ground, so that the safety valve can be ground more accurately without causing excessive grinding of the safety valve. Secondly, in the process of grinding, the position of the automatic grinding head can be moved downward, so that the automatic grinding head can be moved to the top of the safety valve for fixed-point grinding operations. When it is necessary to grind a specific part of the safety valve, the automatic grinding head can be moved downward all the way to perform the grinding operation.

[0020] Secondly, when the safety valve is ground, the present invention can drive the rotating disk to rotate by the rotating motor, and the position of the hinged plate can be driven to rotate. The rotation of the hinged plate can make the lifting seat move up and down on the two slide rails, so that the position of the lifting seat moves downward and drives the position of the automatic grinding head to move downward. In the process of grinding the safety valve, firstly, the position can be adjusted according to the thickness of the safety valve to be ground, so that the safety valve can be ground more accurately without causing excessive grinding of the safety valve. Secondly, in the process of grinding, the position of the automatic grinding head can be moved downward, so that the automatic grinding head can be moved to the top of the safety valve for fixed-point grinding operations. When it is necessary to grind a specific part of the safety valve, the automatic grinding head can be moved downward all the way to perform the grinding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the grinding and swinging structure in the present invention;

[0025] Figure 4 The three-dimensional structure of the grinding limiting structure in the present invention is shown in FIG. Figure 1 ;

[0026] Figure 5 The three-dimensional structure of the grinding limiting structure in the present invention is shown in FIG. Figure 2 ;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the grinding lifting structure in the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the grinding rotating structure and the grinding moving structure in the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the grinding rotating structure in the present invention;

[0030] Reference numerals

[0031] Support seat 1, grinding swing structure 2, swing motor 21, rotating plate 22, rotating shaft 23, rotating frame 24, rotating shaft 25, rotating shaft 26, grinding limit structure 3, mounting frame 31, bidirectional screw slide 32, limit block 33, compression damper 34, arc limit block 35, load-bearing arc plate 36, grinding lifting structure 4, lifting plate 41, lifting electric cylinder 42, sliding rod 43, rotating motor 44, rotating disk 45, grinding rotating structure 5, support frame 51, rotating motor 52, rotating disk 53, slide rail 54, lifting seat 55, hinged plate 56, automatic grinding head 6, grinding moving structure 7, moving screw 71, moving rod 72, moving motor 73, moving block 74, moving groove 75. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] Reference Figures 1 to 8 As shown, an embodiment of the present invention provides a sealing surface grinding device for processing a downhole safety valve, comprising a support seat 1, on which a grinding swinging structure 2 is provided, and the grinding swinging structure 2 can drive the position of the downhole safety valve to move, and the grinding swinging structure 2 is provided with a grinding limiting structure 3 for limiting and fixing the downhole safety valve, and the grinding limiting structure 3 is provided with a grinding lifting structure 4 for lifting the downhole safety valve, and the grinding lifting structure 4 is slidably matched with the grinding limiting structure 3, and a grinding rotating structure 5 for grinding the downhole safety valve is provided on the side of the support seat 1, and an automatic grinding head 6 is provided on the grinding rotating structure 5, and the grinding rotating structure 5 can drive the position of the automatic grinding head 6 to move.

[0035] It should be noted that the grinding disc on the automatic grinding head 6 is detachable, and the coarseness of the grinding disc can be adjusted according to the needs of grinding during the grinding process. It is generally divided into a coarse grinding disc and a fine grinding disc. First use the coarse grinding disc for grinding and then use the fine grinding disc for grinding.

[0036] When in use, the safety valve to be ground is placed on the grinding limit structure 3, and the position of the safety valve can be limited and fixed by the grinding limit structure 3 to prevent the position of the safety valve from being offset during the grinding process and affecting the grinding accuracy. During the grinding process, the position of the safety valve can be driven to rotate by the grinding lifting structure 4. Grinding various positions of the safety valve can also make the inclined surface on the safety valve located below the automatic grinding head 6 to grind the horizontal end face and the inclined end face of the safety valve;

[0037] During the grinding process, the grinding swing structure 2 can adjust the position angle of the safety valve according to the needs of safety valve grinding, so that the inclined end face of the safety valve is exposed under the automatic grinding head 6. During the grinding process, the position of the automatic grinding head 6 can be lowered by the grinding rotating structure 5 according to the burrs on the horizontal end face or the inclined end face or the thickness that needs to be ground, so that the grinding on the end face is in the best state.

[0038] Specifically, the grinding swing structure 2 includes a swing motor 21, which is located on the support seat 1. A rotating plate 22 is provided on the main shaft of the swing motor 21, and a rotating shaft 23 is provided on the rotating plate 22 and is inclined therewith. A rotating frame 24 is provided on the support seat 1 and is rotatably connected therewith. A horizontal rotating shaft 25 is provided on the rotating frame 24, and the rotating shaft 25 is rotatably connected to the rotating frame 24. A vertically arranged rotating shaft 26 is provided on the rotating shaft 25, and the bottom of the rotating shaft 26 is connected to the top of the rotating shaft 23.

[0039] In this embodiment, when the angle position of the safety valve is changed during grinding, the swing motor 21 drives the rotating plate 22 to rotate, which can drive the rotating shaft 23 and the rotating shaft 26 to rotate on the rotating frame 24 through the horizontally arranged rotating shaft 25. During the rotation, the rotating frame 24 is placed on the support seat so that the angle position of the rotating shaft 26 swings. In the process of grinding the inclined end face or end face of the safety valve, the position of the safety valve can be driven to swing and sway, so that the safety valve is in the best and most suitable position at the position of the automatic grinding head 6, so as to grind the inclined face or end face on the safety valve. In the general grinding process, the horizontal end face is ground. The swing motor 21 can drive the position of the rotating shaft 26 to be in a vertical state so that the safety valve is in a horizontal position, and the horizontal end face of the safety valve is ground by the automatic grinding head 6.

[0040] Specifically, the grinding limit structure 3 includes an installation frame 31 arranged on the top of the rotating shaft 26, and a bidirectional screw slide 32 is arranged in the installation frame 31. Two limit blocks 33 are respectively arranged on the two movable ends of the bidirectional screw slide 32. The limit blocks 33 are provided with three compression dampers 34 connected thereto, and the three compression dampers 34 are arranged at equal intervals. The other ends of the three compression dampers 34 are provided with arc limit blocks 35, and the arc limit blocks 35 are provided with a horizontally arranged load-bearing arc plate 36.

[0041] In this embodiment, by simultaneously moving the two movable ends of the bidirectional screw slide 32 toward each other, the positions of the two limit blocks 33 can be moved, and the positions of the two arc-shaped limit blocks 35 can be moved toward the middle, thereby fixing the position of the safety valve placed on the load-bearing arc plate 36. During the fixing process, the three compression dampers 34 can be used to better tighten and fix the safety valve, thereby preventing the position of the safety valve from being offset and changing during the grinding process, thereby affecting the accuracy of the safety valve processing.

[0042] Specifically, the grinding lifting structure 4 includes a horizontally arranged lifting plate 41, two lifting electric cylinders 42 are respectively provided at the two ends of the bottom of the lifting plate 41, and the two lifting electric cylinders 42 are symmetrically arranged on the top of the mounting frame 31. Two sliding rods 43 are respectively provided at the two ends of the bottom of the lifting plate 41, and the sliding rods 43 are slidably matched with the mounting frame 31; the grinding lifting structure 4 also includes a rotating motor 44, which is located at the bottom of the lifting plate 41, and a rotating disk 45 is provided on the main shaft of the rotating motor 44, and the rotating disk 45 is rotatably connected to the lifting plate 41.

[0043] When the safety valve is ground, the rotating motor 44 can be used to drive the rotating disk 45 to rotate, thereby driving the safety valve to rotate on the two arc-shaped limit blocks 35. The position of the safety valve can be changed during the grinding of the safety valve, and the safety valve can be fully ground. During this process, the two arc-shaped limit blocks 35 can be driven by the bidirectional screw slide 32 to loosen the safety valve, so that the safety valve can rotate on the two bearing arc plates 36 on the two arc-shaped limit blocks 35, thereby changing the position angle of the safety valve.

[0044] After the grinding of the safety valve is completed, the two lifting electric cylinders 42 work upward at the same time to drive the lifting plate 41 to move on the installation frame 31 through the corresponding sliding rod 43. After the position of the lifting plate 41 moves upward, the position of the safety valve can be driven to move upward, thereby realizing the movement of the unloading of the safety valve after grinding.

[0045] Specifically, the grinding rotating structure 5 includes a support frame 51 , the top of the support frame 51 extends to above the two arc-shaped limit blocks 35 , and the grinding moving structure 7 is provided on the support frame 51 .

[0046] Specifically, the grinding movable structure 7 includes a movable screw 71 and a movable rod 72. The movable screw 71 is rotatably connected to the support frame 51. The support frame 51 is provided with a movable motor 73 which is transmission-connected to the movable screw 71. The movable rod 72 and the movable screw 71 are symmetrically arranged on the support frame 51. The movable screw 71 is provided with a movable block 74 which is slidably matched therewith, and the movable block 74 is slidably matched with the movable rod 72.

[0047] During the grinding process, the moving motor 73 drives the moving screw 71 to rotate on the support frame 51, so that the moving block 74 moves horizontally on the moving rod 72. The movement of the moving block 74 can drive the position of the automatic grinding head 6 to move horizontally, and the grinding operation can be performed on various positions on the sealing surface of the safety valve. By moving in the diameter direction of the safety valve, the comprehensive grinding operation of the safety valve can be achieved.

[0048] Specifically, the grinding moving structure 7 includes a rotating motor 52 arranged on a moving block 74, a rotating disk 53 is provided on the main shaft of the rotating motor 52, a moving groove 75 is provided on the moving block 74, two vertically symmetrical slide rails 54 are provided in the moving groove 75, and the two slide rails 54 are provided with a lifting seat 55 that slides with them, and a hinged hinge plate 56 is provided between the lifting seat 55 and the rotating disk 53, and the automatic grinding head 6 is located in the lifting seat 55.

[0049] In this embodiment, when the safety valve is ground, the rotating motor 52 drives the rotating disk 53 to rotate, which can drive the hinge plate 56 to rotate. The hinge plate 56 rotates to make the lifting seat 55 move up and down on the two slide rails 54, so that the lifting seat 55 moves downward and drives the automatic grinding head 6 to move downward.

[0050] During the process of grinding the safety valve, firstly, the position can be adjusted according to the thickness of the safety valve that needs to be ground, so that the grinding of the safety valve is more precise and does not cause over-grinding of the safety valve. Secondly, during the grinding process, the position of the automatic grinding head 6 can be moved downward so that the automatic grinding head 6 can be moved to the top of the safety valve for fixed-point grinding operations. When it is necessary to grind a specific part of the safety valve, the automatic grinding head 6 can be moved downward all the way to perform the grinding operation.

[0051] Specifically, a scale is provided on the slide rail 54; the scale is provided on the slide rail 54 so that during the grinding process of the safety valve, by observing the position distance of the lifting seat 55 moving on the slide rail 54, the thickness of the safety valve grinding can be judged and controlled during the actual grinding process, so as to perform precise grinding operations on the end face of the safety valve.

[0052] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A sealing surface grinding device for underground safety valve processing, characterized in that: It comprises a support seat (1), on which a grinding and swinging structure (2) is provided, and the grinding and swinging structure (2) can drive the position of a valve plate of a downhole safety valve to move; The grinding swing structure (2) is provided with a grinding limit structure (3) for limiting and fixing the downhole safety valve; The grinding limit structure (3) is provided with a grinding lifting structure (4) for lifting the downhole safety valve, and the grinding lifting structure (4) and the grinding limit structure (3) are in sliding cooperation with each other; A grinding rotating structure (5) for grinding the downhole safety valve is provided on the side of the support seat (1); An automatic grinding head (6) is provided on the grinding rotating structure (5), and the grinding rotating structure (5) can drive the position of the automatic grinding head (6) to move.

2. A sealing surface grinding device for underground safety valve machining according to claim 1, characterized in that: The grinding swing structure (2) comprises a swing motor (21); The swing motor (21) is located on the support seat (1), and a rotating plate (22) is provided on the main shaft of the swing motor (21); The rotating plate (22) is provided with a rotating shaft (23) which is arranged obliquely therewith, and the supporting seat (1) is provided with a rotating frame (24) which is rotatably connected therewith; The rotating frame (24) is provided with a horizontal rotating shaft (25), and the rotating shaft (25) is rotatably connected to the rotating frame (24); A vertically arranged rotating shaft (26) is provided on the rotating shaft (25), and the bottom of the rotating shaft (26) is connected to the top of the rotating shaft (23).

3. A sealing surface grinding device for underground safety valve machining according to claim 2, characterized in that: The grinding limiting structure (3) comprises a mounting frame (31) arranged on the top of the rotating shaft (26), a bidirectional screw slide (32) is arranged in the mounting frame (31), and two limiting blocks (33) are respectively arranged on two movable ends of the bidirectional screw slide (32); The limit block (33) is provided with three compression dampers (34) connected thereto, and the three compression dampers (34) are arranged at equal intervals; The other ends of the three compression dampers (34) are provided with arc-shaped limit blocks (35), and the arc-shaped limit blocks (35) are provided with a horizontally arranged load-bearing arc plate (36).

4. A sealing surface grinding device for underground safety valve machining according to claim 3, characterized in that: The grinding lifting structure (4) comprises a lifting plate (41) arranged horizontally, two lifting electric cylinders (42) are respectively arranged at two ends of the bottom of the lifting plate (41), and the two lifting electric cylinders (42) are symmetrically arranged on the top of the installation frame (31); Two sliding rods (43) are respectively provided at the two ends of the bottom of the lifting plate (41), and the sliding rods (43) are slidably matched with the installation frame (31).

5. The sealing surface grinding device for underground safety valve machining according to claim 4 is characterized in that: The grinding and lifting structure (4) further comprises a rotating motor (44), and the rotating motor (44) is located at the bottom of the lifting plate (41); A rotating disk (45) is provided on the main shaft of the rotating motor (44), and the rotating disk (45) is rotatably connected to the lifting plate (41).

6. The sealing surface grinding device for underground safety valve machining according to claim 3 is characterized by: The grinding rotating structure (5) comprises a support frame (51), and the top of the support frame (51) extends to above the two arc-shaped limit blocks (35); The support frame (51) is provided with a grinding movable structure (7).

7. The sealing surface grinding device for underground safety valve machining according to claim 6 is characterized by: The grinding moving structure (7) comprises a moving screw (71) and a moving rod (72); The movable screw rod (71) is rotatably connected to the support frame (51), and the support frame (51) is provided with a movable motor (73) which is transmission-connected to the movable screw rod (71); The moving rod (72) and the moving screw rod (71) are symmetrically arranged on the support frame (51); the moving screw rod (71) is provided with a moving block (74) that is slidably matched with the moving screw rod; and the moving block (74) is slidably matched with the moving rod (72).

8. The sealing surface grinding device for underground safety valve machining according to claim 7 is characterized by: The grinding moving structure (7) also includes a rotating motor (52) arranged on the moving block (74); A rotating disk (53) is provided on the main shaft of the rotating motor (52), and a moving groove (75) is provided on the moving block (74); Two vertically symmetrically arranged slide rails (54) are arranged in the movable groove (75), and a lifting seat (55) slidably matched therewith is arranged on the two slide rails (54), and a hinged plate (56) is hingedly arranged between the lifting seat (55) and the rotating disk (53); The automatic grinding head (6) is located in the lifting seat (55).

9. The sealing surface grinding device for machining a downhole safety valve according to claim 8, characterized in that: The slide rail (54) is provided with a scale.

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