Pneumatic chuck with slips capable of ascending and descending synchronously

Abstract

The utility model relates to a pneumatic chuck with slips capable of ascending and descending synchronously. The pneumatic chuck comprises a chuck body, the slips, a linkage assembly and a driving assembly. The multiple slips are arranged in the chuck body and jointly define a clamping cavity. The slips can lift and move in the chuck body, so that the inner diameter of the clamping cavity is changed; the linkage assembly is arranged on the chuck body and connected with the multiple slips at the same time. The driving assembly is arranged on the chuck body and connected with the linkage assembly. According to the pneumatic chuck, the multiple slips can act synchronously, the situation that the lifting efficiency is reduced due to the fact that the adjacent slips are staggered up and down is avoided, and the clamping stability of the slips is improved.

Description

Technical Field

[0001] The present application relates to a pneumatic chuck with synchronously lifting and lowering slips, which is applicable to the technical field of oil pipe operation equipment. Background Art

[0002] When operating an oil well, a chuck is often required to clamp the oil pipe for connection. Existing oil well pneumatic chucks generally consist of a chuck body and slips. Multiple slips are arranged in the chuck body and driven by a cylinder to clamp the oil pipe. In the process of the cylinder driving the slips, the slips will be out of sync, resulting in the vertical misalignment of adjacent slips, reducing the transmission efficiency and the clamping stability of the pneumatic chuck.

[0003] Therefore, a pneumatic chuck with improved clamping stability is needed in the prior art. Utility Model Content

[0004] The purpose of the present application is to design a pneumatic chuck with synchronously lifting and lowering slips, aiming to solve the problem of asynchronism in the clamping process of the slips in the existing chuck.

[0005] The present application relates to a pneumatic chuck with synchronously lifting and lowering slips, the pneumatic chuck comprising a chuck body, slips, a linkage assembly and a drive assembly; a plurality of slips are arranged inside the chuck body and together form a clamping cavity; the slips can be lifted and moved inside the chuck body, thereby changing the inner diameter of the clamping cavity; the linkage assembly is arranged on the chuck body and connected to a plurality of slips at the same time; the drive assembly is arranged on the chuck body and connected to the linkage assembly.

[0006] Further, the chuck body includes a first chuck body, a second chuck body and a third chuck body, and the cava includes a first cava, a second cava and a third cava; one side of the first chuck body is rotatably connected to one side of the second chuck body; the other side of the second chuck body is rotatably connected to one side of the third chuck body and can be disassembled; the other side of the third chuck body is rotatably connected to the other side of the first chuck body; the first cava is movably arranged on the inner side surface of the first chuck body so as to be lifted and lowered, the second cava is movably arranged on the inner side surface of the second chuck body so as to be lifted and lowered, and the third cava is movably arranged on the inner side surface of the third chuck body so as to be lifted and lowered.

[0007] Further, the driving assembly includes a first cylinder, a second cylinder and a third cylinder, the first cylinder is arranged on the first chuck body, the second cylinder is arranged on the second chuck body, and the third cylinder is arranged on the third chuck body; the linkage assembly includes a first linkage, a second linkage and a third linkage, the first end of the first linkage is connected to the first piston rod of the first cylinder, the second end of the first linkage is connected to the first end of the second linkage, the third end of the first linkage is connected to the first end of the third linkage, the second end of the second linkage is connected to the second piston rod of the second cylinder, and the second end of the third linkage is connected to the third piston rod of the third cylinder.

[0008] Furthermore, a first mounting plate is provided on the upper end surface of the first chuck body; the first cylinder is arranged on the first chuck body in the vertical direction, and makes the first piston rod extend out of the first mounting plate; the first linking member includes a first connecting rod, a second connecting rod and a third connecting rod; the bottom of the first connecting rod is movably connected with the first piston rod extending out of the first mounting plate through a first pin shaft; the ends of the second connecting rod and the third connecting rod are respectively provided with connecting grooves; the connecting groove at the end of the second connecting rod is movably connected with the first end of the second linking member through a second pin shaft; the connecting groove at the end of the third connecting rod is movably connected with the first end of the third linking member through a fourth pin shaft.

[0009] Furthermore, a second mounting plate is provided on the upper end surface of the second chuck body; the second cylinder is arranged on the second chuck body in the vertical direction, and the second piston rod extends out of the second mounting plate; the second linking member includes a first support rod and a second support rod; the end of the first support rod is rotatably connected to the second end of the first linking member through a second pin shaft; the bottom of the second support rod is movably connected to the second piston rod extending out of the second mounting plate through a third pin shaft.

[0010] Furthermore, a third mounting plate is provided on the upper end surface of the third chuck body; the third cylinder is arranged on the third chuck body in the vertical direction, and the third piston rod extends out of the third mounting plate; the third linking member includes a first connecting rod and a second connecting rod; the end of the first connecting rod is rotatably connected to the third end of the first linking member through a fourth pin shaft; the bottom of the second connecting rod is movably connected to the third piston rod extending out of the third mounting plate through a fifth pin shaft.

[0011] Furthermore, the first connecting rod, the second connecting rod and the third connecting rod are interconnected to form a Y-shaped integrated structure; the second connecting member and the third connecting member are symmetrically arranged.

[0012] Furthermore, a seat is provided on the inner side surface of the slip; the outer side surface of the slip is an inclined surface along the vertical direction, and the slip is slidably matched with the slope surface in the chuck body through the inclined surface.

[0013] Furthermore, a roller shaft is provided between the inclined surface and the slope surface.

[0014] Furthermore, the inclined surface and the slope surface are respectively snap-fit ​​surfaces; the inclined surface is a concave surface, and the slope surface is a convex surface, and the concave surface and the convex surface are adapted to each other.

[0015] The pneumatic chuck with synchronously lifting slips proposed in this application has the following technical advantages:

[0016] (1) The pneumatic chuck proposed in the present application enables multiple slips to move synchronously, avoiding vertical misalignment between adjacent slips, reducing lifting efficiency, and improving the clamping stability of the slips;

[0017] (2) The pneumatic chuck proposed in this application has a reasonable structural design and is easy to assemble;

[0018] (3) The pneumatic chuck proposed in this application can improve the efficiency of oil well operations and reduce the labor intensity of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the pneumatic chuck of the present application.

[0020] Figure 2 It is a schematic diagram of the chuck body of the pneumatic chuck of the present application.

[0021] Figure 3 It is a top view of the pneumatic chuck of the present application.

[0022] Figure 4 It is a partial schematic diagram of the pneumatic chuck of the present application.

[0023] Figure 5 It is a schematic diagram of the internal structure of the pneumatic chuck of the present application.

[0024] Figure 6 The first linkage of this application is shown Figure 1 .

[0025] Figure 7 The second linkage of this application is shown in FIG. Figure 1 .

[0026] Figure 8 The third linkage member of this application is shown in FIG. Figure 1 .

[0027] Fig. 9 The first linkage of this application is shown Figure 2 .

[0028] Fig.10 The second linkage of this application is shown in FIG. Figure 2 .

[0029] Fig.11 The third linkage member of this application is shown in FIG. Figure 2 .

[0030] In the figure: 1, first chuck body; 11, first cylinder; 111, first piston rod; 12, first mounting plate; 2, second chuck body; 21, second cylinder; 211, second piston rod; 22, second mounting plate; 3, third chuck body; 31, third cylinder; 311, third piston rod; 32, third mounting plate; 4, first slip; 41, first clamping surface; 5, second slip; 52, second clamping surface; 6, third slip; 61, third clamping surface; 7, first linkage Part; 71, first connecting rod; 72, second connecting rod; 73, third connecting rod; 74, connecting groove; 75, first pin; 8, second connecting member; 81, first support rod; 82, second support rod; 83, second pin; 84, third pin; 9, third connecting member; 91, first connecting rod; 92, second connecting rod; 93, fourth pin; 94, fifth pin; 10, first connecting axis; 20, second connecting axis; 30, third connecting axis; 40, clamping cavity; 50, inclined surface. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict. It can be understood by those skilled in the art that the pneumatic chuck of the present application can be used to clamp the oil pipe in oil well operations to achieve disassembly or connection.

[0032] like Figure 1-3 As shown, a pneumatic chuck with synchronously lifting and lowering slips of the present application can be used to clamp the oil pipe in oil well operations, and can also be used in other suitable occasions. The pneumatic chuck of the present application includes a chuck body, slips, a linkage assembly and a drive assembly; wherein, a plurality of slips are movably arranged inside the chuck body, and together enclose to form a clamping cavity 40, through which the oil pipe can be clamped. Further, the slips can be lifted and moved in the vertical direction in the chuck body, thereby changing the inner diameter of the clamping cavity 40 to achieve clamping and loosening. The linkage assembly is arranged on the chuck body and connected to a plurality of slips at the same time, so that it can be linked with a plurality of slips as a whole. The drive assembly is arranged on the chuck body and connected to the linkage assembly, so that the linkage assembly can drive a plurality of slips to lift and move in the vertical direction. The pneumatic chuck designed in the present application, its linkage assembly can play a linkage role, realize synchronous action, avoid up and down misalignment between adjacent slips, and the occurrence of asynchronism, and improve the stability of clamping.

[0033] Preferably, in combination with the above scheme, Figure 1-4As shown, in this embodiment, the chuck body includes a first chuck body 1, a second chuck body 2 and a third chuck body 3. Correspondingly, the slips include a first slip 4, a second slip 5 and a third slip 6. Specifically, one side of the first chuck body 1 is rotatably connected to one side of the second chuck body 2 through a third connecting shaft 30; the other side of the second chuck body 2 is rotatably connected to one side of the third chuck body 3 through a first connecting shaft 10, and the first connecting shaft 10 can be disassembled, so that the second chuck body 2 and the third chuck body 3 can be disassembled, and it can be allowed to be sleeved on the oil pipe from one side of the chuck body during disassembly. The other side of the third chuck body 3 is rotatably connected to the other side of the first chuck body 1 through a second connecting shaft 20.

[0034] Further, the first slip 4 can be arranged on the inner side surface of the first chuck body 1 so as to be lifted and moved in the vertical direction, the second slip 5 can be arranged on the inner side surface of the second chuck body 2 so as to be lifted and moved in the vertical direction, and the third slip 6 can be arranged on the inner side surface of the third chuck body 3 so as to be lifted and moved in the vertical direction. The first slip 4, the second slip 5 and the third slip 6 are enclosed together to form a clamping cavity 40. In the present application, the first slip 4 can be lifted and moved in the vertical direction on the inner side surface of the first chuck body 1, the second slip 5 can be lifted and moved in the vertical direction on the inner side surface of the second chuck body 2, and the third slip 6 can be lifted and moved in the vertical direction on the inner side surface of the third chuck body 3, at which time the inner diameter of the clamping cavity 40 can be changed to achieve clamping or loosening.

[0035] Further, the linkage assembly is arranged on the first chuck body, and is simultaneously connected to the first slip 4, the second slip 5 and the third slip 6. Specifically, the linkage assembly includes a first linkage member 7, a second linkage member 8 and a third linkage member 9, which are connected to each other; the first linkage member 7 is arranged on the first chuck body 1 and is connected to the first slip 4; the second linkage member 8 is arranged on the second chuck body 2 and is connected to the second slip 5; the third linkage member 9 is arranged on the third chuck body 3 and is connected to the third slip 6, thereby realizing linkage.

[0036] Preferably, in combination with the above scheme, Figure 1 and 4As shown, in this embodiment, the driving assembly includes a first cylinder 11, a second cylinder 21 and a third cylinder 31, wherein the first cylinder 11 is arranged on the first chuck body 1, the second cylinder 21 is arranged on the second chuck body 2, and the third cylinder 31 is arranged on the third chuck body 3. Correspondingly, the linkage assembly includes a first linkage member 7, a second linkage member 8 and a third linkage member 9. Among them, the first end of the first linkage member 7 is connected to the first piston rod 111 of the first cylinder 11, the second end of the first linkage member 7 is connected to the first end of the second linkage member 8, the third end of the first linkage member 7 is connected to the first end of the third linkage member 9, the second end of the second linkage member 8 is connected to the second piston rod 211 of the second cylinder 21, and the second end of the third linkage member 9 is connected to the third piston rod 311 of the third cylinder 31. Such a design enables the three cylinders to simultaneously drive the three chuck bodies to rise and fall together through the linkage assembly, thereby ensuring the clamping stability of the slips.

[0037] Preferably, in combination with the above scheme, Figure 1-3 As shown, in this embodiment, the upper end surface of the first chuck body 1 is provided with a first mounting plate 12; the first cylinder 11 is arranged on the first chuck body 1 in the vertical direction, and the first piston rod 111 extends out of the first mounting plate 12. Further, the first connecting member 7 includes a first connecting rod 71, a second connecting rod 72 and a third connecting rod 73, and the first connecting rod 71, the second connecting rod 72 and the third connecting rod 73 are an integrated structure. Among them, the bottom of the first connecting rod 71 is movably connected to the first piston rod 111 extending out of the first mounting plate 12 through a first pin shaft 75, and can be extended and retracted together with the first piston rod 111. Further, the ends of the second connecting rod 72 and the third connecting rod 73 are respectively provided with connecting grooves 74. Specifically, the connecting groove 74 at the end of the second connecting rod 72 is movably connected to the first end of the second connecting member 8 through a second pin shaft 83; the connecting groove 74 at the end of the third connecting rod 73 is movably connected to the first end of the third connecting member 9 through a fourth pin shaft 93.

[0038] Preferably, in combination with the above scheme, Figure 1-3 As shown, in this embodiment, the upper end surface of the second chuck body 2 is provided with a second mounting plate 22; the second cylinder 21 is arranged on the second chuck body 2 in the vertical direction, and the second piston rod 211 extends out of the second mounting plate 22. Further, the second linkage 8 includes a first support rod 81 and a second support rod 82, and the first support rod 81 and the second support rod 82 are an integral structure. Specifically, the end of the first support rod 81 is rotatably connected to the second end of the first linkage 7 through a second pin 83; the bottom of the second support rod 82 is movably connected to the second piston rod 211 extending out of the second mounting plate 22 through a third pin 84.

[0039] Preferably, in combination with the above scheme, Figure 1-4As shown, in this embodiment, the upper end surface of the third chuck body 3 is provided with a third mounting plate 32; the third cylinder 31 is arranged on the third chuck body 3 in the vertical direction, and the third piston rod 311 extends out of the third mounting plate 32; further, the third linkage 9 includes a first connecting rod 91 and a second connecting rod 92, and the first connecting rod 91 and the second connecting rod 92 are an integral structure. Specifically, the end of the first connecting rod 91 is rotatably connected to the third end of the first linkage 7 through a fourth pin 93; the bottom of the second connecting rod 92 is movably connected to the third piston rod 311 extending out of the third mounting plate 32 through a fifth pin 94.

[0040] Preferably, in combination with the above scheme, Figures 6 to 11 As shown, in this embodiment, the first connecting rod 71, the second connecting rod 72 and the third connecting rod 73 are interconnected to form a Y-shaped integrated structure, so that the three chuck body structures can be adapted for arrangement. Furthermore, the second linking member 8 and the third linking member 9 are symmetrically arranged, specifically an integrated bending structure. The first linking member 7, the second linking member 8 and the third linking member 9 designed in this application are separate parts, which can be designed and processed separately, and can be directly installed on the original chuck body and drive assembly, and the assembly is relatively convenient.

[0041] Preferably, in combination with the above scheme, Figure 1-5 As shown, in this embodiment, the inner side surface of the slip is an arc surface, and a clamping seat is provided on the arc surface. A plurality of arc surfaces enclose a circular clamping cavity, so that the oil pipe can be clamped. Further, the outer side surface of the slip is an inclined surface 50 along the vertical direction, and the slip slides with the slope surface in the chuck body through the inclined surface 50, thereby gradually changing the inner diameter of the clamping cavity. Specifically, when the slip gradually rises upward along its inclined surface 50, the inner diameter of the clamping cavity 40 gradually increases, thereby loosening the oil pipe; when the slip gradually descends downward along its inclined surface 50, the inner diameter of the clamping cavity 40 gradually decreases, thereby clamping the oil pipe.

[0042] Preferably, in combination with the above scheme, Figure 1-5 As shown, in this embodiment, a roller is further provided between the inclined surface 50 and the slope surface, and the design of the roller serves to reduce friction resistance and increase the clamping force.

[0043] Preferably, in combination with the above scheme, Figure 1-5 As shown, in this embodiment, the inclined surface 50 and the slope surface are respectively the clamping surfaces. Among them, the inclined surface 50 is a concave surface, and the slope surface is a convex surface. The concave surface and the convex surface are adapted to each other, can be clamped together, and slide up and down along the slope surface. Figure 4As shown, the outer side surface of the first cava 4 is designed as a first clamping surface 41, which cooperates with the slope surface inside the first chuck body 1; the outer side surface of the second cava 5 is designed as a second clamping surface 51, which cooperates with the slope surface inside the second chuck body 2; the outer side surface of the third cava 6 is designed as a third clamping surface 61, which cooperates with the slope surface inside the third chuck body 6.

[0044] The pneumatic chuck with synchronously lifting slips proposed in this application has the following technical advantages:

[0045] (1) The pneumatic chuck proposed in the present application enables multiple slips to move synchronously, avoiding vertical misalignment between adjacent slips, reducing lifting efficiency, and improving the clamping stability of the slips;

[0046] (2) The pneumatic chuck proposed in this application has a reasonable structural design and is easy to assemble;

[0047] (3) The pneumatic chuck proposed in this application can improve the efficiency of oil well operations and reduce the labor intensity of personnel.

[0048] Although the implementation methods disclosed in this application are as above, the contents described are only implementation methods adopted for facilitating the understanding of this application, and are not intended to limit this application. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. A pneumatic chuck with synchronously lifting slips, characterized in that: The pneumatic chuck comprises a chuck body, a slip, a linkage assembly and a drive assembly; a plurality of the slips are arranged inside the chuck body and together form a clamping cavity (40); the slips can be lifted and moved inside the chuck body to change the inner diameter of the clamping cavity (40); the linkage assembly is arranged on the chuck body and is connected to the plurality of slips at the same time; the drive assembly is arranged on the chuck body and is connected to the linkage assembly.

2. The pneumatic chuck according to claim 1, characterized in that: The chuck body comprises a first chuck body (1), a second chuck body (2) and a third chuck body (3), and the cava comprises a first cava (4), a second cava (5) and a third cava (6); one side of the first chuck body (1) is rotatably connected to one side of the second chuck body (2); the other side of the second chuck body (2) is rotatably connected to one side of the third chuck body (3); the other side of the third chuck body (3) is rotatably connected to the other side of the first chuck body (1); the first cava (4) can be lifted and moved on the inner side surface of the first chuck body (1), the second cava (5) can be lifted and moved on the inner side surface of the second chuck body (2), and the third cava (6) can be lifted and moved on the inner side surface of the third chuck body (3).

3. The pneumatic chuck according to claim 2, characterized in that: The driving assembly comprises a first cylinder (11), a second cylinder (21) and a third cylinder (31), wherein the first cylinder (11) is arranged on the first chuck body (1), the second cylinder (21) is arranged on the second chuck body (2), and the third cylinder (31) is arranged on the third chuck body (3); the linkage assembly comprises a first linkage member (7), a second linkage member (8) and a third linkage member (9), wherein a first end of the first linkage member (7) is connected to a first piston rod (111) of the first cylinder (11), a second end of the first linkage member (7) is connected to a first end of the second linkage member (8), a third end of the first linkage member (7) is connected to a first end of the third linkage member (9), a second end of the second linkage member (8) is connected to a second piston rod (211) of the second cylinder (21), and a second end of the third linkage member (9) is connected to a third piston rod (311) of the third cylinder (31).

4. The pneumatic chuck according to claim 3, characterized in that: The upper end surface of the first chuck body (1) is provided with a first mounting plate (12); the first cylinder (11) is arranged on the first chuck body (1) in the vertical direction, and the first piston rod (111) extends out of the first mounting plate (12); the first connecting member (7) comprises a first connecting rod (71), a second connecting rod (72) and a third connecting rod (73); the first connecting rod (71) is movably connected to the first piston rod (111) extending out of the first mounting plate (12) through a first pin shaft (75); the ends of the second connecting rod (72) and the third connecting rod (73) are respectively provided with connecting grooves (74); the connecting groove (74) at the end of the second connecting rod (72) is movably connected to the first end of the second connecting member (8) through a second pin shaft (83); the connecting groove (74) at the end of the third connecting rod (73) is movably connected to the first end of the third connecting member (9) through a fourth pin shaft (93).

5. The pneumatic chuck according to claim 3 or 4, characterized in that: The upper end surface of the second chuck body (2) is provided with a second mounting plate (22); the second cylinder (21) is arranged on the second chuck body (2) in the vertical direction, and enables the second piston rod (211) to extend out of the second mounting plate (22); the second connecting member (8) comprises a first support rod (81) and a second support rod (82); the end of the first support rod (81) is rotatably connected to the second end of the first connecting member (7) through a second pin shaft (83); the second support rod (82) is movably connected to the second piston rod (211) extending out of the second mounting plate (22) through a third pin shaft (84).

6. The pneumatic chuck according to claim 3 or 4, characterized in that: A third mounting plate (32) is provided on the upper end surface of the third chuck body (3); the third cylinder (31) is arranged on the third chuck body (3) in the vertical direction, and enables the third piston rod (311) to extend out of the third mounting plate (32); the third linkage (9) comprises a first connecting rod (91) and a second connecting rod (92); the end of the first connecting rod (91) is rotatably connected to the third end of the first linkage (7) via a fourth pin shaft (93); the second connecting rod (92) is movably connected to the third piston rod (311) extending out of the third mounting plate (32) via a fifth pin shaft (94).

7. The pneumatic chuck according to claim 4, characterized in that: The first connecting rod (71), the second connecting rod (72) and the third connecting rod (73) are interconnected to form a Y-shaped integrated structure; the second connecting member (8) and the third connecting member (9) are symmetrically arranged.

8. The pneumatic chuck according to any one of claims 1 to 4 and 7, characterized in that: The inner side surface of the slip is provided with a chuck seat; the outer side surface of the slip is an inclined surface (50) along the vertical direction, and the slip is slidably matched with the slope surface in the chuck body through the inclined surface (50).

9. The pneumatic chuck according to claim 8, characterized in that: A roller shaft is also provided between the inclined surface (50) and the slope surface.

10. The pneumatic chuck according to claim 8, characterized in that: The inclined surface (50) and the slope surface are respectively clamping surfaces; the inclined surface (50) is a concave surface, the slope surface is a convex surface, and the concave surface and the convex surface are adapted to each other.

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