Inner hole grinding device for seamless steel pipe production

Abstract

The invention relates to the technical field of steel pipe coping, in particular to an inner hole coping device for seamless steel pipe production, which comprises a bracket, the other end of a rotating shaft assembly is fixedly connected with a coping head mechanism, the rotating shaft assembly is fixedly connected with a driving assembly, a steel pipe is sleeved on the outer side of the rotating shaft assembly and is fixed, and the driving assembly is started to drive the rotating shaft assembly to rotate; the driving assembly drives the rotating shaft assembly, the main grinding head assembly and the compensation grinding head assembly to rotate to grind an inner hole of a steel pipe, when the main grinding head assembly is abraded, the hydraulic assembly is started to enable the main grinding head assembly to stretch out to compensate abrasion, meanwhile, when the main grinding head assembly rotates, the compensation grinding head assembly is driven to rotate, and the inner hole of the steel pipe is ground through the inertia effect. The main grinding head assembly is made to deflect, so that the other end of the compensation grinding head assembly generates pressure on the inner hole wall of the steel pipe, the steel pipe is ground, abrasion of the main grinding head is compensated, the size precision in the machining process is higher, and the trouble of frequently replacing grinding tools is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe grinding, in particular to an inner hole grinding device for seamless steel pipe production. Background Art

[0002] Seamless steel pipes are widely used, especially in oil fields. At present, after the seamless steel pipe is processed into a blank pipe, certain burrs or impurities are formed on the inner surface of the seamless steel pipe. In order to overcome the burrs and impurities on the inner hole surface of the seamless steel pipe, the existing practice is usually to use a brush to go deep into the inner hole of the seamless steel pipe and scrape it back and forth to remove the burrs and impurities on the inner hole surface, which requires manual operation; The existing publication number is: CN113442013B, which is a seamless steel pipe inner hole grinding machine, including a machine body, support boxes are fixedly arranged on both left and right side surfaces of the machine body, a flatness detection mechanism is arranged on the support box located on the left side, and a stable working mechanism is arranged in the support box located on the right side, a working chamber is opened in the machine body, a power motor is fixedly arranged in the working chamber, and both left and right sides of the power motor are connected to a driving shaft, and grinding chambers are opened on the upper and lower sides of the machine body, which can effectively collect dust through a collection box, and are provided with raised grooves to prevent cold air from being lost, and can quickly and effectively collect iron filings from grinding; When the existing steel pipe inner hole grinding device is grinding the inner hole of the steel pipe, the high hardness and wear resistance of stainless steel will accelerate the wear of the grinding tool, resulting in a gradual decrease in dimensional accuracy during the processing process, and the grinding tool needs to be replaced frequently. Summary of the invention

[0003] The object of the present invention is to provide an inner hole grinding device for seamless steel pipe production to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: Provided is an inner hole grinding device for seamless steel pipe production, comprising: A bracket, wherein a rotating shaft assembly is rotatably connected to the bracket, one end of the rotating shaft assembly is connected to the hydraulic assembly, the other end of the rotating shaft assembly is fixedly connected to the grinding head mechanism, and the rotating shaft assembly is fixedly connected to the driving assembly; The grinding head mechanism comprises: A main grinding head assembly, one side of which is fixedly connected to the other end of the rotating shaft assembly, and the other side of which is rotatably connected to the compensating grinding head assembly.

[0005] Furthermore, the shaft assembly includes: A right main shaft, one end of the right main shaft is rotatably connected to the shaft cover, a hydraulic chamber is opened in the right main shaft, a piston is slidably connected in the hydraulic chamber, the other end of the right main shaft is fixedly connected to one end of the left main shaft, a shaft core is slidably connected at the connecting portion between the left main shaft and the right main shaft, one end of the shaft core is fixedly connected to a piston, and a spring is sleeved on the shaft core.

[0006] Furthermore, the main grinding head assembly includes: A flange plate, wherein a sliding cavity is provided on the flange plate, an installation groove is provided on the outer edge of the flange plate, a plurality of grinding blocks are slidably connected in the installation groove, the grinding block is fixedly connected to one end of the sliding shaft, the sliding shaft slides radially along the flange plate, a spring 2 is sleeved on the sliding shaft, a trapezoidal block is fixedly connected to the other end of the sliding shaft, the trapezoidal block is arranged in the sliding cavity, the inclined surface of the trapezoidal block abuts against the side of the conical disk, and the conical disk is fixedly connected to the other end of the shaft core.

[0007] Furthermore, the compensating grinding head assembly includes: A plurality of guide rods, one end of each of the guide rods is rotatably connected to one side of the flange, the other end of the guide rod is fixedly connected to a spherical grinding head, a counterweight is slidably connected to the guide rod, and a spring is connected between the guide rod and the flange.

[0008] Furthermore, the driving assembly includes: A motor, one end of which is fixedly connected to a synchronous wheel, a synchronous wheel is fixedly connected to the right main shaft, and the two synchronous wheels are driven by a synchronous belt; and The hydraulic assembly includes: The cylinder is fixedly connected to the bracket, the output end of the cylinder is fixedly connected to the second piston, the second piston is slidably connected in the liquid storage tank, the upper end of the liquid storage tank is provided with a liquid outlet, and the liquid outlet is connected to the shaft cover through a hose.

[0009] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. Put the steel pipe on the outside of the rotating shaft assembly and fix it. Start the driving assembly to drive the rotating shaft assembly, the main grinding head assembly and the compensating grinding head assembly to rotate, and grind the inner hole of the steel pipe. When the main grinding head assembly is worn, start the hydraulic assembly to extend the main grinding head assembly to compensate for the wear. At the same time, when the main grinding head assembly rotates, it drives the compensating grinding head assembly to rotate. Through the action of inertia, the main grinding head assembly deflects, so that the other end of the compensating grinding head assembly generates pressure on the inner hole wall of the steel pipe to grind it and compensate for the wear of the main grinding head. This makes the dimensional accuracy higher during the processing and avoids the trouble of frequent replacement of grinding tools.

[0010] 2. When the main grinding head assembly is worn, the hydraulic assembly presses the liquid into the right spindle through the hose. Under the liquid pressure, the piston 1 in the right spindle moves in the direction of the left spindle, thereby driving the shaft core to move together. At this time, the spring 1 is compressed, and when the shaft core moves, it drives the conical disk fixed to the other end to move together. Since the inclined surface of the trapezoidal block abuts against the side of the conical disk, when the conical disk moves, it pushes the trapezoidal block to move, so that the trapezoidal block drives the sliding shaft and the grinding block to move radially outward along the flange. Spring 2 is compressed to achieve the effect of compensating for the wear of the grinding block, and the remaining life is predicted by monitoring the pressure changes in the hydraulic chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding 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 improper limitations on the present invention.

[0012] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the hydraulic assembly of the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the grinding head mechanism of the present invention; Figure 4 It is a schematic diagram of the overall three-dimensional structure of the grinding head mechanism of the present invention; Figure 5 It is a schematic diagram of the overall three-dimensional structure of the main grinding head assembly of the present invention; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the main grinding head assembly of the present invention; Figure 7 It is a schematic diagram of the overall three-dimensional structure of the compensation grinding head assembly of the present invention; Figure 8 It is a schematic diagram of the overall three-dimensional structure of the spherical grinding head of the present invention; Fig. 9 It is a schematic diagram of the overall three-dimensional structure of the conical disk of the present invention; Fig.10 It is a schematic diagram of the overall three-dimensional structure of the rotating shaft assembly of the present invention; Fig.11It is a schematic diagram of the overall three-dimensional structure of the rotating shaft assembly of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Bracket; 2. Rotating shaft assembly; 21. Right spindle; 211. Hydraulic chamber; 22. Shaft cover; 23. Piston 1; 24. Left spindle; 25. Shaft core; 26. Spring 1; 3. Hydraulic assembly; 31. Cylinder; 32. Piston 2; 33. Liquid storage tank; 34. Liquid outlet; 4. Grinding head mechanism; 41. Main grinding head assembly; 411. Flange; 4111. Sliding cavity; 4112. Mounting groove; 412. Grinding block; 413. Sliding shaft; 414. Second spring; 415. Trapezoidal block; 416. Conical disk; 42. Compensating grinding head assembly; 421. Guide rod; 422. Spherical grinding head; 423. Counterweight; 5. Drive assembly; 51. Motor; 52. Synchronous wheel; 53. Synchronous belt. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the solution of the present application, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0015] Reference Figure 1 As shown, an inner hole grinding device for seamless steel pipe production includes: A bracket 1, wherein a shaft assembly 2 is rotatably connected to the bracket 1, one end of the shaft assembly 2 is connected to a hydraulic assembly 3, the other end of the shaft assembly 2 is fixedly connected to a grinding head mechanism 4, and the shaft assembly 2 is fixedly connected to a driving assembly 5; The grinding head mechanism 4 includes: A main grinding head assembly 41 , one side of which is fixedly connected to the other end of the rotating shaft assembly 2 , and the other side of which is rotatably connected to the compensating grinding head assembly 42 .

[0016] The steel pipe is sleeved on the outside of the rotating shaft assembly 2 and fixed. By starting the driving assembly 5, the driving assembly 5 drives the rotating shaft assembly 2, the main grinding head assembly 41 and the compensating grinding head assembly 42 to rotate, and the inner hole of the steel pipe is grinded. When the main grinding head assembly 41 is worn, the hydraulic assembly 3 is started to extend the main grinding head assembly 41 to compensate for the wear. At the same time, when the main grinding head assembly 41 rotates, it drives the compensating grinding head assembly 42 to rotate. Through the action of inertia, the main grinding head assembly 41 is deflected, so that the other end of the compensating grinding head assembly 42 generates pressure on the inner hole wall of the steel pipe to grind it and compensate for the wear of the main grinding head.

[0017] Reference Figure 10-11 As shown, the rotating shaft assembly 2 includes: A right main shaft 21, one end of which is rotatably connected to a shaft cover 22, a hydraulic chamber 211 is provided in the right main shaft 21, a piston 23 is slidably connected in the hydraulic chamber 211, the other end of the right main shaft 21 is fixedly connected to one end of a left main shaft 24, a shaft core 25 is slidably connected at the connection portion between the left main shaft 24 and the right main shaft 21, one end of the shaft core 25 is fixedly connected to a piston 23, and a spring 26 is sleeved on the shaft core 25.

[0018] When the main grinding head assembly 41 is worn, the hydraulic assembly 3 presses the liquid into the right spindle 21 through the hose. Under the liquid pressure, the piston 23 in the right spindle 21 moves in the direction of the left spindle 24, thereby driving the shaft core 25 to move together. At this time, the spring 26 is compressed.

[0019] Reference Figure 3-6 As shown in FIG. 9 , the main grinding head assembly 41 includes: A flange 411 is provided with a sliding cavity 4111, and an installation groove 4112 is provided on the outer edge of the flange 411. A plurality of grinding blocks 412 are slidably connected in the installation groove 4112. The grinding blocks 412 are fixedly connected to one end of a sliding shaft 413. The sliding shaft 413 slides radially along the flange 411. A spring 2 414 is sleeved on the sliding shaft 413. A trapezoidal block 415 is fixedly connected to the other end of the sliding shaft 413. The trapezoidal block 415 is arranged in the sliding cavity 4111. The inclined surface of the trapezoidal block 415 abuts against the side of the conical disk 416. The conical disk 416 is fixedly connected to the other end of the shaft core 25.

[0020] When the shaft core 25 moves, it drives the conical disk 416 fixedly connected to its other end to move together. Since the inclined surface of the trapezoidal block 415 abuts against the side of the conical disk 416, when the conical disk 416 moves, the trapezoidal block 415 is pushed to move, so that the trapezoidal block 415 drives the sliding shaft 413 and the grinding block 412 to move radially outward along the flange 411, and the spring 2 414 is compressed to achieve the effect of compensating for the wear of the grinding block 412.

[0021] Reference Figure 7-8 As shown, the compensating grinding head assembly 42 includes: A plurality of guide rods 421, one end of each of the guide rods 421 is rotatably connected to one side of the flange 411, the other end of each guide rod 421 is fixedly connected to a spherical grinding head 422, a counterweight 423 is slidably connected to each guide rod 421, and a spring is connected between the guide rod 421 and the flange 411.

[0022] When the flange 411 rotates, it drives the compensating grinding head assembly 42 to rotate together. Under the action of inertia, the counterweight block 423 on the guide rod 421 slides toward the spherical grinding head 422, so that the spherical grinding head 422 sticks to the inner hole surface of the steel pipe, and the spring is compressed to grind it.

[0023] Reference Figure 2 As shown, the driving assembly 5 includes: A motor 51, one end of the motor 51 is fixedly connected to a synchronous wheel 52, a synchronous wheel 52 is fixedly connected to the right main shaft 21, and the two synchronous wheels 52 are driven by a synchronous belt 53; and The hydraulic assembly 3 includes: The cylinder 31 is fixedly connected to the bracket 1, and the output end of the cylinder 31 is fixedly connected to the piston 2 32. The piston 2 32 is slidably connected in the liquid storage tank 33. The upper end of the liquid storage tank 33 is provided with a liquid outlet 34, and the liquid outlet 34 is connected to the shaft cover 22 through a hose.

[0024] When the motor 51 rotates, the two synchronous wheels 52 drive the right spindle 21 through the transmission action of the synchronous belt 53, thereby driving the left spindle 24 and the flange 411 to rotate, and grinding the inner hole of the steel pipe. When the grinding block 412 is worn, the cylinder 31 is driven to extend, so that the piston 2 32 presses the liquid in the liquid storage tank 33 from the liquid outlet 34 through the hose into the right spindle 21, so that the hydraulic pressure in the right spindle 21 increases, thereby causing the piston 1 23 to move toward the left spindle 24.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An inner hole grinding device for seamless steel pipe production, characterized in that: include: A bracket (1), wherein a rotating shaft assembly (2) is rotatably connected to the bracket (1), one end of the rotating shaft assembly (2) is connected to a hydraulic assembly (3), the other end of the rotating shaft assembly (2) is fixedly connected to a grinding head mechanism (4), and the rotating shaft assembly (2) is fixedly connected to a driving assembly (5); The grinding head mechanism (4) comprises: A main grinding head assembly (41), one side of the main grinding head assembly (41) is fixedly connected to the other end of the rotating shaft assembly (2), and the other side of the main grinding head assembly (41) is rotatably connected to the compensation grinding head assembly (42).

2. The inner hole grinding device for seamless steel pipe production according to claim 1 is characterized in that: The rotating shaft assembly (2) comprises: A right main shaft (21), one end of the right main shaft (21) is rotatably connected to the shaft cover (22), a hydraulic chamber (211) is provided in the right main shaft (21), a piston (23) is slidably connected in the hydraulic chamber (211), the other end of the right main shaft (21) is fixedly connected to one end of the left main shaft (24), a shaft core (25) is slidably connected at the connection portion between the left main shaft (24) and the right main shaft (21), one end of the shaft core (25) is fixedly connected to the piston (23), and a spring (26) is sleeved on the shaft core (25).

3. The inner hole grinding device for seamless steel pipe production according to claim 2, characterized in that: The main grinding head assembly (41) comprises: A flange (411) is provided with a sliding cavity (4111), an outer edge of the flange (411) is provided with a mounting groove (4112), a plurality of grinding blocks (412) are slidably connected in the mounting groove (4112), the grinding blocks (412) are fixedly connected to one end of a sliding shaft (413), the sliding shaft (413) slides radially along the flange (411), a spring 2 (414) is sleeved on the sliding shaft (413), a trapezoidal block (415) is fixedly connected to the other end of the sliding shaft (413), the trapezoidal block (415) is arranged in the sliding cavity (4111), the inclined surface of the trapezoidal block (415) abuts against the side surface of the conical disk (416), and the conical disk (416) is fixedly connected to the other end of the shaft core (25).

4. The inner hole grinding device for seamless steel pipe production according to claim 3, characterized in that: The compensating grinding head assembly (42) comprises: A plurality of guide rods (421), one end of each of the guide rods (421) being rotatably connected to one side of the flange (411), the other end of each of the guide rods (421) being fixedly connected to a spherical grinding head (422), a counterweight (423) being slidably connected to the guide rods (421), and a spring being connected between the guide rods (421) and the flange (411).

5. The inner hole grinding device for seamless steel pipe production according to claim 4, characterized in that: The driving component (5) comprises: A motor (51), one end of the motor (51) being fixedly connected to a synchronous wheel (52), a synchronous wheel (52) being fixedly connected to the right main shaft (21), and the two synchronous wheels (52) being driven by a synchronous belt (53); and The hydraulic assembly (3) comprises: A cylinder (31), the cylinder (31) is fixedly connected to the bracket (1), the output end of the cylinder (31) is fixedly connected to the second piston (32), the second piston (32) is slidably connected in a liquid storage tank (33), and a liquid outlet (34) is provided at the upper end of the liquid storage tank (33), and the liquid outlet (34) is connected to the shaft cover (22) through a hose.

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