Ejector rod mounting device of steel pipe perforating machine

Abstract

The utility model discloses a steel pipe puncher ejector rod installation device which is used for arranging an ejector rod on a puncher, a clamping section is arranged on the ejector rod, the steel pipe puncher ejector rod installation device comprises a clamping installation block and a clamping plate, a puncher sleeving ring is arranged at one axial end of the clamping installation block, and a clamping plate installation plate is arranged at the other axial end of the clamping installation block. The clamping mounting block is provided with an ejector rod avoiding groove between the perforating machine sleeving ring and the clamping plate mounting plate, and the perforating machine is sleeved with the perforating machine sleeving ring; the clamping plate mounting plate comprises two clamping walls which are axially arranged, and a containing groove is formed between the two clamping walls; a groove with an upward opening is formed in the clamping plate; the clamping plate is axially provided with matching grooves penetrating in the radial direction and located on the two sides of the groove, and a bearing face is arranged in the groove. According to the utility model, the problems of mandril coating, inner surface warping, bundle section breaking and the like caused by inaccurate positioning of the mandril can be effectively avoided, the product quality and the production efficiency are improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to a mandrel installation device for a steel pipe piercing mill, belonging to the technical field of steel pipe production. Background Art

[0002] In the production process of a steel pipe piercing mill, the mandrel is one of the key components, and its performance directly affects the product quality and production efficiency. By searching the prior art, it is found that the Chinese patent with the publication number CN205762959U discloses a rear trolley for a piercing mill used in seamless steel pipe production. A mandrel connecting piece is used to connect the mandrel in this patent.

[0003] Currently, a mandrel positioning baffle is commonly used in front of the mandrel connecting piece. Its size and thickness are generally 30 mm, and it is mainly used to receive the card slot of the 35-mm clamping section at the tail of the mandrel, so as to effectively push and pull out the mandrel during the piercing process. However, after the mandrel positioning baffle is impacted, it is easy to cause inaccurate positioning of the card slot, and problems such as mandrel coating, inner surface peeling, and broken clamping section may occur during the piercing process, seriously affecting the product quality and production efficiency and increasing the production cost. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a mandrel installation device for a steel pipe piercing mill, which can effectively avoid problems such as mandrel coating, inner surface peeling, and broken beam joints caused by inaccurate mandrel positioning, improve the product quality and production efficiency, and reduce the maintenance cost.

[0005] To solve the above technical problem, the technical solution of the utility model is: a mandrel installation device for a steel pipe piercing mill, used to set a mandrel on a piercing mill. The mandrel is provided with a clamping section. The mandrel installation device for a steel pipe piercing mill includes:

[0006] A clamping installation block, one axial end of the clamping installation block is provided with a piercing mill socket ring, and the other axial end is provided with a clamping plate mounting plate. The clamping installation block is provided with a mandrel avoidance groove between the piercing mill socket ring and the clamping plate mounting plate. The piercing mill socket ring is sleeved on the piercing mill;

[0007] The clamping plate mounting plate includes two axially arranged clamping walls, and a receiving groove is formed between the two clamping walls;

[0008] A clamping plate, the clamping plate is provided with a groove with an upward opening; radial through mating grooves are opened on both sides of the groove in the axial direction of the clamping plate, a bearing surface is provided in the groove, and the clamping plate is detachably installed in the receiving groove of the clamping plate mounting plate;

[0009] When the clamping section of the mandrel is stuck on the bearing surface of the groove of the clamping plate, the step surface of the adjacent section of the clamping section of the mandrel abuts in the mating groove.

[0010] Furthermore, in order to facilitate the positioning and fixing of the clamping plate, at least one mounting hole is provided on the circumferential clamping wall of the clamping plate mounting plate;

[0011] It further includes a positioning clamping block, and the positioning clamping block is detachably fixed on the clamping wall corresponding to the mounting hole through a connecting piece;

[0012] The positioning clamping block is adapted to abut against the upper end of the clamping plate to position the clamping plate.

[0013] Furthermore, the clamping wall is crescent-shaped, and the size in the middle of the clamping wall is larger than that on both sides.

[0014] Furthermore, the clamping plate is provided with inclined surfaces on both circumferential sides of the groove, which incline towards the groove from the outside to the inside.

[0015] Furthermore, chamfers are provided on the outer peripheral edges on both axial sides of the groove of the clamping plate.

[0016] Furthermore, in order to facilitate the outflow of cooling water from the through hole during cooling, at least one through hole is provided at the bottom of the ejector rod avoidance groove.

[0017] Furthermore, in order to reduce the impact on the ejector rod, a transition arc is provided between the grooves of the clamping plate.

[0018] Furthermore, a specific material of the clamping plate is provided, and the clamping plate is made of 45# steel.

[0019] Furthermore, connecting wing plates are further provided on both radial sides of the clamping and mounting block, and the ends of the connecting wing plates are connected to the perforating machine.

[0020] Furthermore, the thickness of the clamping plate is between 25 mm and 35 mm;

[0021] The thickness of the clamping plate at the mating groove is between 8 mm and 12 mm.

[0022] By adopting the above technical solutions, the utility model has the following beneficial effects:

[0023] In the utility model, first, the clamping and mounting block is installed on the perforating machine, and then the clamping plate is installed on the clamping and mounting block. By providing radially penetrating mating grooves on both sides of the groove in the axial direction of the clamping plate, when the ejector rod is inserted into the clamping plate, it can be stably in place, avoiding the problem of inaccurate positioning. Even if there is a slight deviation in the initial positioning of the ejector rod, it is within the range of the mating groove, enabling the ejector rod to accurately fall onto the bearing surface of the groove of the clamping plate.

[0024] In addition, the utility model is also provided with a limiting block, which can limit the clamping plate in the receiving groove, avoiding the risk of displacement of the clamping plate during use. Meanwhile, the design of the ejector rod avoidance groove and the through hole at its bottom enable the cooling water to be quickly discharged, preventing the cooling water from staying in the ejector rod avoidance groove and improving the convenience of maintenance.

[0025] In summary, the utility model provides an ejector rod installation device for a steel pipe piercing mill, which is convenient for installation, stable in use, and easy to maintain. It effectively avoids problems such as inaccurate positioning of the ejector rod, covering of the ejector rod, warping of the inner surface, and broken tie rods, improves product quality and production efficiency, and reduces maintenance costs at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front view of the clamping plate of the ejector rod installation device for the steel pipe piercing mill of the utility model;

[0027] Figure 2 is the side view of the clamping plate of the ejector rod installation device for the steel pipe piercing mill of the utility model;

[0028] Figure 3 is the schematic three-dimensional structure of the ejector rod installation device for the steel pipe piercing mill of the utility model Figure 1 ;

[0029] Figure 4 is the schematic three-dimensional structure of the ejector rod installation device for the steel pipe piercing mill of the utility model Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the content of the utility model easier to be clearly understood, the following further detailed description of the utility model is given according to specific embodiments in conjunction with the drawings.

[0031] As Figures 1-4 shown, an ejector rod installation device for a steel pipe piercing mill is used to set an ejector rod on a piercing mill. The ejector rod is provided with a clamping section. The ejector rod installation device for the steel pipe piercing mill includes:

[0032] A clamping and installation block 1. One axial end of the clamping and installation block 1 is provided with a piercing mill socket ring 11, and the other axial end is provided with a clamping plate mounting plate 12. The clamping and installation block 1 is provided with an ejector rod avoidance groove 13 between the piercing mill socket ring 11 and the clamping plate mounting plate 12. The piercing mill socket ring 11 is sleeved on the piercing mill;

[0033] The clamping plate mounting plate 12 includes two axially arranged clamping walls, and a receiving groove is formed between the two clamping walls;

[0034] The pallet 2 is provided with a groove 22 with an upward opening; on both sides of the groove 22 in the axial direction of the pallet 2, there are radially penetrating mating grooves 21. There is a bearing surface in the groove 22, and the pallet 2 is detachably installed in the receiving groove of the pallet mounting plate 12;

[0035] When the clamping section of the ejector rod is clamped on the bearing surface of the groove 22 of the pallet 2, the step surface of the adjacent section of the clamping section of the ejector rod abuts in the mating groove 21.

[0036] In this embodiment, as Figures 1-2 shown, first install the clamping and mounting block 1 on the perforating machine, and then install the pallet 2 on the clamping and mounting block 1. By providing radially penetrating mating grooves 21 on both sides of the groove 22 in the axial direction of the pallet 2, the ejector rod can be stably in place when it is inserted into the pallet 2, avoiding the problem of inaccurate positioning. Even if there is a slight deviation in the initial positioning of the ejector rod, it is within the range of the mating groove 21, enabling the clamping section of the ejector rod to accurately fall onto the bearing surface of the groove 22 of the pallet 2, thus achieving accurate positioning and stable installation of the ejector rod. The mating groove is 45 mm from the center line to each side, that is, the total width is 90 mm.

[0037] Specifically, the card wall is crescent-shaped, and the size in the middle of the card wall is larger than that on both sides.

[0038] In this embodiment, the size of the card wall refers to the depth of the receiving groove surrounded by the card wall.

[0039] Specifically, as Figures 1-2 and Figure 4 shown, the pallet 2 is provided with inclined surfaces on both circumferential sides of the groove 22 that incline towards the groove 22 from the outside to the inside.

[0040] Specifically, as Figures 1-2 and Figure 4 shown, there is a transition arc between the inclined surface of the pallet 2 and the end of the corresponding groove 22.

[0041] Specifically, as Figures 1-2 and Figure 4 shown, the outer peripheral edges on both axial sides of the groove 22 of the pallet 2 are provided with chamfers.

[0042] In this embodiment, as Figures 1-2 shown, the chamfer effectively reduces the edge wear of the pallet 2. The chamfer and the inclined surface also play a guiding role to ensure that the ejector rod can quickly and accurately fall into the groove 22.

[0043] Specifically, as Figures 1-4 shown, mounting holes 14 are provided on the circumferential card walls of the pallet mounting plate 12;

[0044] The ejector rod installation device of the steel pipe piercing mill further includes a limit clamping block 3, and the limit clamping block 3 is detachably fixed on the clamping wall corresponding to the installation hole through a connecting piece;

[0045] The limit clamping block 3 is adapted to abut against the upper end of the clamping plate 2 to limit the clamping plate 2.

[0046] Specifically, as Figure 3 shown, a plurality of through holes are provided at the bottom of the ejector rod avoidance groove 13.

[0047] In this embodiment, the function of the through holes is to facilitate the cooling water to flow out of the ejector rod avoidance groove 13.

[0048] Specifically, as Figures 1-2 and Figure 4 shown, the clamping plate 2 is made of 45# steel.

[0049] In this embodiment, as Figures 1-2 and Figure 4 shown, the clamping plate 2 uses 45# steel with quenching and tempering treatment.

[0050] Specifically, as Figure 4 shown, connecting wing plates (not shown in the figure) are further provided on both radial sides of the clamping and installing block 1, and the ends of the connecting wing plates are connected to the piercing mill.

[0051] In this embodiment, as Figures 3-4 shown, the connecting wing plates are connected to the unit trolley of the piercing mill. After the piercing mill socket ring 11 of the clamping and installing block 1 is sleeved on the piercing mill, the clamping and installing block 1 is fixed using the connecting wing plates.

[0052] Specifically, as Figures 1-2 and Figure 4 shown, the thickness of the clamping plate 2 is between 25 mm and 35 mm;

[0053] The thickness of the clamping plate 2 at the mating groove 21 is between 8 mm and 12 mm.

[0054] In this embodiment, as Figures 1-2 and Figure 4 shown, the thickness of both sides of the mating groove 21 is cut open 10 mm from the center line each, and the remaining thickness of the clamping plate 2 at the mating groove 21 is 10 mm.

[0055] In the above specific embodiments, the technical problems solved, technical solutions and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mandrel installation device for a steel pipe piercing mill, used to set a mandrel on the piercing mill, wherein a clamping section is provided on the mandrel, and it is characterized in that, The ejector rod mounting device of the steel pipe piercing mill includes: A clamping mounting block (1). One axial end of the clamping mounting block (1) is provided with a piercing mill socket ring (11), and the other axial end is provided with a clamping plate mounting plate (12). The clamping mounting block (1) is provided with an ejector rod avoidance groove (13) between the piercing mill socket ring (11) and the clamping plate mounting plate (12). The piercing mill socket ring (11) is sleeved on the piercing mill. The clamping plate mounting plate (12) includes two axially arranged clamping walls, and a receiving groove is formed between the two clamping walls. A clamping plate (2) is provided with a groove (22) with an upward opening. Axially on both sides of the groove (22) of the clamping plate (2), there are radially penetrating mating grooves (21). A bearing surface is provided in the groove (22). The clamping plate (2) is detachably installed in the receiving groove of the clamping plate mounting plate (12). When the clamped section of the ejector rod is clamped on the bearing surface of the groove (22) of the clamping plate (2), the step surface of the adjacent section of the clamped section of the ejector rod abuts in the mating groove (21).

2. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein The clamping wall is crescent-shaped, and the size in the middle of the clamping wall is larger than that on both sides.

3. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein The clamping plate (2) is provided with inclined surfaces on both circumferential sides of the groove (22) that incline from the outside to the inside of the groove (22).

4. The ejector rod mounting device of the steel pipe piercing mill according to claim 3, wherein A transition arc is provided between the inclined surface of the clamping plate (2) and the end of the corresponding groove (22).

5. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein The outer peripheral edges on both axial sides of the groove (22) of the clamping plate (2) are provided with chamfers.

6. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein At least one mounting hole (14) is provided on the circumferential clamping wall of the clamping plate mounting plate (12). It further includes a limit clamping block (3). The limit clamping block (3) is detachably fixed on the clamping wall corresponding to the mounting hole (14) through a connecting piece. The limit clamping block (3) is adapted to abut against the upper end of the clamping plate (2) to limit the clamping plate (2).

7. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein At least one through hole is provided at the bottom of the ejector rod avoidance groove (13).

8. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein The clamping plate (2) is made of 45# steel.

9. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein Connecting wing plates are further provided on both radial sides of the clamping mounting block (1). The ends of the connecting wing plates are connected to the piercing mill.

10. The ejector rod mounting device of the steel pipe piercing mill according to claim 1, wherein The thickness of the clamping plate (2) is between 25 mm and 35 mm. The thickness of the clamping plate (2) at the mating groove (21) is between 8 mm and 12 mm.

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