Steel pipe clamping fixture for spinning machine

Abstract

This utility model discloses a steel pipe clamping fixture for a spinning machine, including a fixed sleeve, a sliding sleeve, a first inclined slide block, a second inclined slide block, and grippers. The sliding sleeve moves along the axial direction, causing the first inclined slide block to slide toward the second inclined slide block, driving the second inclined slide block toward the surface of the steel pipe. This causes the multiple grippers to come together and clamp the steel pipe, ensuring that the steel pipe cannot rotate or move, thereby improving the quality of subsequent spinning and sealing.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing equipment, and in particular to a steel pipe clamping fixture for a spinning machine. Background Technology

[0002] The manufacturing standards for pressure vessels such as boilers require all pressure-bearing components and pipelines to undergo hydrostatic testing in the factory to ensure that the pipelines can operate smoothly after installation at the user site. Currently, the common practice in the industry for pipeline pressure testing is to weld hydrostatic sealing plates to the pipe openings to pressurize them. Due to the large number of pipe openings, the time and material consumption for welding the sealing plates are quite large.

[0003] To improve the welding efficiency of pipe end seals during hydraulic pressure testing of pressure pipelines and reduce the consumption of sealing plate materials, a spinning sealing device has been introduced. This device replaces the traditional hydraulic sealing plate welding method and has high production efficiency. However, the current spinning sealing of steel pipes relies on inclined plane positioning. When the clamps tighten the steel pipe, they also drive the steel pipe forward, causing the steel pipe to bend at the spinning sealing position, resulting in poor sealing surface quality and the risk of water leakage. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a steel pipe clamping fixture for a spinning machine, which can ensure that the steel pipe cannot rotate or move, thereby improving the quality of subsequent spinning and sealing.

[0005] A steel pipe clamping fixture for a spinning machine according to a first aspect embodiment of the present invention includes a fixed sleeve, a sliding sleeve, a first inclined slide block, a second inclined slide block, and grippers. A groove is provided through the interior of the fixed sleeve along its axial direction. The sliding sleeve and the groove are slidably fitted. One end of the first inclined slide block is fixed to the end of the sliding sleeve, and the other end is provided with a first inclined surface. Multiple first inclined slide blocks are provided along the extending direction of the first inclined surface, and the multiple first inclined slide blocks are arranged around the axis of the sliding sleeve. One end of the second inclined slide block is provided with a second inclined surface, and the other end abuts against the end face of the groove. Multiple second inclined slide blocks are provided, and the multiple second inclined slide blocks are arranged around the axis of the sliding sleeve. The sliding sleeve is arranged around the axis at intervals. An elastic element is provided between two adjacent second sliders. The elastic element drives the two second inclined sliders to move away from each other. The second inclined surface is provided with a guide groove. The gripper is detachably connected to the side of the second inclined slider near the center of the sliding sleeve. Multiple grippers are provided. The multiple grippers can abut against the surface of the steel pipe to clamp the steel pipe. The second inclined surface abuts against the first inclined surface, and the first inclined slider is slidably built into the guide groove. When the sliding sleeve slides in the direction of the second inclined slider, the first inclined surface cooperates with the second inclined surface to make the second inclined slider retract and move closer to the center of the sliding sleeve.

[0006] The steel pipe clamping fixture for the spinning machine according to the present utility model embodiment has at least the following beneficial effects: the sliding sleeve moves along the axial direction, causing the first inclined slider to slide toward the second inclined slider, driving the second inclined slider toward the surface of the steel pipe, causing multiple jaws to come together and cooperate to clamp the steel pipe, ensuring that the steel pipe cannot rotate or move, and improving the quality of subsequent spinning and sealing.

[0007] According to some embodiments of this utility model, the elastic element is a spring, and mounting holes are provided on both sides of the second inclined slider. The end of the elastic element is embedded in the mounting hole and fixedly connected to the bottom surface of the mounting hole.

[0008] According to some embodiments of the present invention, limiting plates are provided on both sides of the second inclined surface, wherein two limiting plates are spaced apart to form the guide groove between the two limiting plates.

[0009] According to some embodiments of the present invention, in cross-section, the first inclined surface is inclined from the end away from the second inclined slider towards the end closer to the second inclined slider, and is inclined outward in the direction of the sliding sleeve. The first inclined surface and the second inclined surface have the same inclination angle so that the first inclined surface and the second inclined surface abut and fit together.

[0010] According to some embodiments of the present invention, the bottom surface of the second inclined slider is provided with a first slot, the upper surface of the gripper is provided with a second slot, a connecting post is provided between the second inclined slider and the gripper, and the two ends of the connecting post are respectively engaged with the first slot and the second slot.

[0011] According to some embodiments of this utility model, a flange is provided at one end of the fixed sleeve near the second inclined slider. The flange has a through hole, the diameter of which is larger than the inner diameter, so that a limiting surface is provided at the end of the through hole near the second inclined slider. The first inclined slider is fixed to the side wall of the sliding sleeve and is built into the through hole. The end of the first inclined slider can abut against the limiting surface to constrain the position of the first inclined slider.

[0012] According to some embodiments of the present invention, the end sidewall of the sliding sleeve is provided with a positioning groove, one side of the first inclined slider is provided with a positioning protrusion, the positioning protrusion is embedded in the positioning groove, and the other side of the first inclined slider abuts against the inner side of the through hole.

[0013] According to some embodiments of this utility model, the flange is fixedly connected to an end cover, the end cover has a through hole, the end cover has a receiving groove, the second inclined slider is built into the receiving groove, the bottom surface of the receiving groove abuts against the first inclined slider and the side surface of the receiving groove abuts against the inner surface of the receiving groove.

[0014] According to some embodiments of this utility model, the flange and the end cap are fixedly connected by screws.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the steel pipe clamping fixture for the spinning machine according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0019] Figure 3 This is a three-dimensional assembly diagram of the first and second inclined sliders according to an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the first and second inclined sliders according to an embodiment of the present invention.

[0021] 100. Fixed sleeve; 110. Slide groove; 120. Flange; 121. Through hole; 122. Limiting surface;

[0022] 200. Sliding sleeve; 210. Positioning groove;

[0023] 300. First inclined slider; 310. First inclined surface; 320. Positioning protrusion;

[0024] 400, Second inclined slider; 410, Second inclined surface; 420, Mounting hole; 430, First slot; 440, Guide groove; 441, Limiting plate;

[0025] 500. Gripper; 510. Second slot; 520. Connecting post;

[0026] 600. Elastic components;

[0027] 700, end cap; 710, receiving groove; 720, perforation; Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figure 1 and Figure 2The steel pipe clamping fixture for a spinning machine according to this utility model embodiment includes a fixed sleeve 100, a sliding sleeve 200, a first inclined slider 300, a second inclined slider 400, and a clamp 500. A groove 110 is provided through the interior of the fixed sleeve 100 along its axial direction; the sliding sleeve 200 and the groove 110 are slidably engaged. One end of the first inclined slider 300 is fixed to the end of the sliding sleeve 200, and the other end is provided with a first inclined surface 310. Multiple first inclined sliders 300 are provided along the extending direction of the first inclined surface 310, and the multiple first inclined sliders 300 are arranged around the axis of the sliding sleeve 200. One end of the second inclined slider 400 is provided with a second inclined surface 410, and the other end abuts against the end face of the groove 110. Multiple second inclined sliders 400 are provided, and the multiple first inclined sliders 500 are arranged around the axis of the sliding sleeve 200. Two inclined sliders 400 are arranged at intervals around the axis of the sliding sleeve 200. An elastic element 600 is provided between two adjacent second sliders. The elastic element 600 drives the two second inclined sliders 400 away from each other. The second inclined surface 410 is provided with a guide groove 440. The gripper 500 is detachably connected to the side of the second inclined slider 400 near the center of the sliding sleeve. Multiple grippers 500 are provided. Multiple grippers 500 can abut against the surface of the steel pipe to clamp the steel pipe. The second inclined surface 410 abuts against the first inclined surface 310, and the first inclined slider 300 is slidably built into the guide groove 440. When the sliding sleeve 200 slides in the direction of the second inclined slider 400, the first inclined surface 310 cooperates with the second inclined surface 410 to make the second inclined slider 400 contract and move closer to the center of the sliding sleeve 200.

[0033] In practical use, the sliding sleeve 200 slides axially along the groove 110 of the fixed sleeve 100, driving the first inclined slider 300 to move towards the second inclined slider 400. The first inclined surface 310 and the second inclined surface 410 interact, and the second inclined slider 400 slides along the guide groove 440 towards the center of the sliding sleeve 200, compressing the elastic element 600. Multiple grippers 500 move towards the center synchronously with the second inclined slider 400 and contact the surface of the steel pipe, thus clamping the steel pipe. To further explain, the wedge-shaped fit between the first inclined surface 310 and the second inclined surface 410 converts the axial linear motion of the sliding sleeve 200 into the radial contraction motion of the second inclined slider 400. The clamping of the steel pipe by the grippers 500 is achieved through the force transmission of the mechanical structure. Furthermore, when the first inclined slider 300 moves in the opposite direction, the elastic element 600 provides a reset tendency for the second inclined slider 400, causing the grippers 500 to release the steel pipe, making it easier to remove the processed steel pipe.

[0034] In summary, the sliding sleeve 200 moves axially, causing the first inclined slider 300 to slide toward the second inclined slider 400. This movement drives the second inclined slider 400 toward the surface of the steel pipe, causing the multiple grippers 500 to come together and clamp the steel pipe, ensuring that the steel pipe cannot rotate or move, thus improving the quality of subsequent spin sealing.

[0035] In some embodiments, refer to Figure 3 and Figure 4 The elastic element 600 is a spring. Mounting holes 420 are provided on both sides of the second inclined slider 400. The end of the elastic element 600 is embedded in the mounting hole 420 and fixedly connected to the bottom surface of the mounting hole 420. When the second inclined slider 400 contracts towards the center, the spring is compressed and undergoes elastic deformation. When the sliding sleeve 200 moves in the opposite direction, the force exerted by the first inclined slider 300 on the second inclined slider 400 decreases, the spring recovers its deformation, and pushes the adjacent second inclined sliders 400 away from each other, causing the gripper 500 to reset and release the steel pipe. This ensures that the gripper 500 automatically resets after the clamping action, facilitating the loading and unloading of the steel pipe. Simultaneously, the mounting holes 420 ensure the stability of the spring installation, preventing it from falling off during operation.

[0036] In some embodiments, refer to Figure 3 and Figure 4 Limiting plates 441 are provided on both sides of the second inclined surface 410. The two limiting plates 441 are spaced apart to form a guide groove 440 between them. The guide groove 440 formed by the limiting plates 441 provides a precise movement trajectory for the second inclined slider 400, preventing it from deviating or wobbling during sliding, ensuring the stability of the inclined slider engagement and the synchronization of the gripper 500 movement, and improving clamping accuracy.

[0037] It should be mentioned that, in order to make the movement of the second inclined slider 400 smoother, based on the above embodiment, in the cross-section, referring to Figure 2 The first inclined surface 310 is inclined outward from the end furthest from the second inclined slider 400 toward the end closest to the second inclined slider 400, towards the outside of the sliding sleeve. The first inclined surface 310 and the second inclined surface 410 have the same inclination angle so that the first inclined surface 310 and the second inclined surface 410 abut and fit together. When the first inclined slider 300 moves toward the second inclined slider 400, the first inclined surface 310 and the second inclined surface 410 with the same inclination angle are in complete contact. During the relative sliding process, the force is evenly transmitted between the inclined surfaces, avoiding local stress concentration.

[0038] In some embodiments, refer to Figure 1 and Figure 2 A flange 120 is provided at one end of the fixed sleeve 100 near the second inclined slider 400. A through hole 121 is provided through the flange 120. The diameter of the through hole 121 is larger than the inner diameter of the fixed sleeve 100, so that a limiting surface 122 is provided at one end of the through hole 121. The first inclined slider 300 is fixed to the side wall of the sliding sleeve 200. The first inclined slider 300 is built into the through hole 121. The end of the first inclined slider 300 can abut against the limiting surface 122 to constrain the position of the first inclined slider 300.

[0039] In actual use, the first inclined slider 300 slides with the sliding sleeve 200 within the through hole 121 of the flange 120. When the sliding sleeve 200 moves to the limit position, the end of the first inclined slider 300 contacts the limiting surface 122 of the through hole 121, restricting the first inclined slider 300 from continuing to move, thereby limiting the maximum stroke of the sliding sleeve 200. The setting of the limiting surface 122 can prevent the first inclined slider 300 from slipping out of the cooperation range with the second inclined slider 400 due to excessive sliding, avoiding damage to the components, while ensuring that the stroke of the clamping action is controllable and ensuring that the clamping force of the gripper 500 is within a suitable range.

[0040] Furthermore, to prevent relative movement between the first inclined slider 300 and the sliding sleeve, refer to Figure 1 and Figure 2 The sliding sleeve has a positioning groove 210 on its end sidewall, and the first inclined slider 300 has a positioning protrusion 320 on one side, which is embedded in the positioning groove 210. The other side of the first inclined slider 300 abuts against the inner surface of the through hole 121. When installing the first inclined slider 300, its positioning protrusion 320 is embedded into the positioning groove 210 of the sliding sleeve to achieve initial positioning. At the same time, the other side of the first inclined slider 300 abuts against the inner surface of the through hole 121 to further restrict its position and ensure that the first inclined slider 300 moves synchronously with the sliding sleeve. The cooperation between the positioning groove 210 and the positioning protrusion 320 ensures the stability of the connection between the first inclined slider 300 and the sliding sleeve and prevents them from sliding relative to each other. At the same time, the abutment between the first inclined slider 300 and the inner surface of the through hole 121 enhances the stability of the overall structure and improves the reliability of force transmission. It should be emphasized that the contact between the first inclined slider 300 and the inner surface of the through hole 121 forms radial support, reducing the vibration and displacement of the component during movement.

[0041] Preferably, refer to Figure 1 and Figure 2 The flange 120 is fixedly connected to an end cap 700. The end cap 700 has a through hole 720 and a receiving groove 710. A second inclined slider 400 is housed within the receiving groove 710, with the bottom surface of the groove abutting against it. The side surface of the first inclined slider 300 abuts against the inner surface of the receiving groove 710. The second inclined slider 400 slides within the receiving groove 710 of the end cap 700. The bottom surface and inner surface of the receiving groove 710 constrain the second inclined slider 400 and the first inclined slider 300, respectively. Furthermore, the first inclined surface 310 and the second inclined surface 410 constrain each other, as do the guide groove 440 and the second inclined slider 400, limiting the movement of the first inclined slider 300 and the second inclined slider 400 in non-working directions and ensuring that each component operates according to a preset trajectory. Finally, the flange 120 and the end cap 700 are fixedly connected by screws.

[0042] In some embodiments, to accommodate steel pipes with different bore diameters, refer to Figure 2 The second inclined slider 400 has a first slot 430 on its bottom surface, and the gripper 500 has a second slot 510 on its upper surface. A connecting post 520 is provided between the second inclined slider 400 and the gripper 500. The two ends of the connecting post 520 are respectively engaged with the first slot 430 and the second slot 510. When installing the gripper 500, the two ends of the connecting post 520 are respectively engaged with the first slot 430 of the second inclined slider 400 and the second slot 510 of the gripper 500 to achieve a detachable connection between the two. When replacing the gripper 500, the old gripper 500 can be removed and the new gripper 500 can be installed by separating the connecting post 520 from the slot. The quick disassembly and assembly of the gripper 500 is achieved through the engagement structure between the connecting post 520 and the slot, which facilitates the replacement of the appropriate gripper 500 according to the steel pipe with different diameters, improves the versatility and maintenance convenience of the tooling, and reduces replacement costs.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A steel pipe clamping tool for a spinning machine, characterized by comprising: include: A fixed sleeve (100) has a sliding groove (110) extending through its interior along the axial direction of the fixed sleeve (100). The sliding sleeve (200) is slidably engaged with the sliding groove (110); The first inclined slider (300) has one end fixed to the end of the sliding sleeve (200) and the other end provided with a first inclined surface (310). Along the extension direction of the first inclined surface (310), there are multiple first inclined sliders (300), and multiple first inclined sliders (300) are arranged around the axis of the sliding sleeve (200). The second inclined slider (400) has a second inclined surface (410) at one end and abuts against the end face of the slide groove (110) at the other end. Multiple second inclined sliders (400) are arranged at intervals around the axis of the sliding sleeve (200). An elastic element (600) is provided between two adjacent second inclined sliders (400), and the elastic element (600) drives the two second inclined sliders (400) to move away from each other. The second inclined surface (410) is provided with a guide groove (440). The gripper (500) is detachably connected to the side of the second inclined slider (400) near the center of the sliding sleeve (200). Multiple grippers (500) are provided, and multiple grippers (500) can abut against the surface of the steel pipe to clamp the steel pipe. The second inclined surface (410) and the first inclined surface (310) abut against each other, and the first inclined slider (300) is slidably built into the guide groove (440). When the sliding sleeve (200) slides toward the direction where the second inclined slider (400) is located, the first inclined surface (310) cooperates with the second inclined surface (410) to make the second inclined slider (400) retract and move closer to the center of the sliding sleeve (200).

2. The steel pipe clamping tool for a spinning machine according to claim 1, characterized by The elastic element (600) is a spring. The second inclined slider (400) has mounting holes (420) on both sides. The end of the elastic element (600) is embedded in the mounting hole (420) and fixedly connected to the bottom surface of the mounting hole (420).

3. The steel pipe clamping tool for a spinning machine according to claim 1, characterized by Limiting plates (441) are provided on both sides of the second inclined surface (410), wherein the two limiting plates (441) are spaced apart to form the guide groove (440) between the two limiting plates (441).

4. The steel pipe clamping tool for a spinning machine according to claim 1 or 3, characterized by In cross-section, the first inclined surface (310) is inclined from the end away from the second inclined slider (400) toward the end close to the second inclined slider (400) toward the outside of the sliding sleeve (200). The first inclined surface (310) and the second inclined surface (410) have the same inclination angle so that the first inclined surface (310) and the second inclined surface (410) abut and fit together.

5. The steel pipe clamping tool for a spinning machine according to claim 1, characterized by The bottom surface of the second inclined slider (400) is provided with a first slot (430), the upper surface of the gripper (500) is provided with a second slot (510), and a connecting post (520) is provided between the second inclined slider (400) and the gripper (500). The two ends of the connecting post (520) are respectively engaged with the first slot (430) and the second slot (510).

6. The steel pipe clamping fixture for a spinning machine according to claim 1, characterized in that, A flange (120) is provided at one end of the fixed sleeve (100) near the second inclined slider (400). The flange (120) has a through hole (121) through it. The diameter of the through hole (121) is larger than the inner diameter of the fixed sleeve (100) so that a limiting surface (122) is provided at one end of the through hole (121) near the fixed sleeve (100). The first inclined slider (300) is fixed to the side wall of the sliding sleeve (200). The first inclined slider (300) is built into the through hole (121). The end of the first inclined slider (300) can abut against the limiting surface (122) to constrain the position of the first inclined slider (300).

7. The steel pipe clamping tool for a spinning machine according to claim 6, characterized by The end sidewall of the sliding sleeve (200) is provided with a positioning groove (210), and one side of the first inclined slider (300) is provided with a positioning protrusion (320). The positioning protrusion (320) is embedded in the positioning groove (210), and the other side of the first inclined slider (300) abuts against the inner side of the through hole (121).

8. The steel pipe clamping tool for a spinning machine according to claim 6, characterized by The flange (120) is fixedly connected to an end cap (700), the end cap (700) has a through hole (720) and a receiving groove (710), the second inclined slider (400) is built into the receiving groove (710), the bottom surface of the receiving groove (710) abuts, and the side surface of the first inclined slider (300) abuts with the inner side surface of the receiving groove (710).

9. The steel pipe clamping tool for a spinning machine according to claim 8, characterized by The flange (120) and the end cap (700) are fixedly connected by screws.

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