Heat-resistant and wear-resistant piercing plug with high stability

Abstract

The utility model discloses a heat-resistant and wear-resistant piercing plug with high stability, which comprises a plug body, a connecting rod arranged at the bottom of the plug body, a liquid conveying pipe arranged inside the connecting rod, a cooling cavity arranged inside the plug body, a fixing rod fixedly connected with the inner wall of the plug body, a reinforcing plate fixedly connected with the outer side of the fixing rod, and a water outlet arranged on the inner wall of the plug body. The bottom of the plug body is fixedly connected with the heat insulation layer, the outer side of the connecting rod is fixedly connected with the fixing cylinder, the inserting rod is arranged on the fixing cylinder, and the sliding cylinder is arranged on the outer side of the connecting rod and fixedly connected with the two ends of the sliding rod. Cooling is carried out through the cooling cavity, instability of the ejector head caused by high temperature is avoided, abrasion of the ejector head is reduced, the strength of the ejector head is enhanced through cooperation of the fixing barrel and the reinforcing plate, the sliding barrel is pushed to enable the connecting rod to move in the sliding groove, the inserting rod is driven to be separated from the inserting hole, and then the ejector head body can be disassembled. The dismounting difficulty of the plug body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of perforated mandrel technology, specifically a heat-resistant and wear-resistant perforated mandrel with high stability. Background Technology

[0002] Seamless steel pipes are made by piercing a whole round steel bar, and are steel pipes without weld seams on the surface. The piercing mandrel is one of the most important molds in the production of seamless steel pipes. During the production of seamless steel pipes, the steel pipe piercing mandrel needs to be installed on the seamless steel pipe piercing machine to pierce and roll the round tube billet.

[0003] During the piercing process, the mandrel needs to continuously rub against the seamless steel pipe, causing the temperature to rise. The increased temperature of the mandrel accelerates wear, thereby reducing the stability of the mandrel. Therefore, cooling chambers are mostly set inside the mandrel for cooling, but this reduces the structural strength of the mandrel itself, making it prone to instability. Utility Model Content

[0004] The purpose of this invention is to provide a heat-resistant and wear-resistant perforated mandrel with high stability, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a highly stable, heat-resistant, and wear-resistant perforated mandrel, comprising a mandrel body, a connecting rod at the bottom of the mandrel body, an infusion tube inside the connecting rod, a cooling chamber inside the mandrel body, a fixed rod fixedly connected to the inner wall of the mandrel body, a reinforcing plate fixedly connected to the outer side of the fixed rod, a drain outlet on the inner wall of the mandrel body, a reflux chamber inside the connecting rod, a heat insulation layer fixedly connected to the bottom of the mandrel body, a fixed cylinder fixedly connected to the outer side of the connecting rod, an insert rod on the fixed cylinder, a sliding cylinder on the outer side of the connecting rod, a fixed connection between the sliding cylinder and both ends of the sliding rod, and a spring inside the sliding cylinder.

[0006] Preferably, the top head body is inserted into the outer side of the connecting rod via an installation cylinder, and the bottom surface of the fixing rod is in contact with the upper surface of the connecting rod.

[0007] Preferably, the fixing rod is provided with an inlet pipe, which is connected to the delivery pipe. The delivery pipe is connected to the cooling chamber through the inlet pipe, and the drain outlets are distributed in a circumferential array on the inner wall of the cooling chamber.

[0008] Preferably, the drain outlet is connected to the reflux chamber, the reflux chamber is located outside the infusion tube, and a heat insulation layer is provided inside the connecting rod, the heat insulation layer being located between the infusion tube and the reflux chamber.

[0009] Preferably, a plurality of insertion holes are provided on the outer side of the mounting cylinder, and the insertion holes are engaged with the insertion rod.

[0010] Preferably, a sliding groove is provided on the outer side of the insertion rod, and the sliding groove is slidably engaged with the sliding rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention uses a liquid inlet pipe to allow coolant to enter the cooling chamber through the inlet pipe, thereby cooling the mandrel and preventing instability during processing under high temperature and high pressure. It also reduces wear on the mandrel itself, ensuring its stability during the piercing process. The mandrel's strength is enhanced by the combination of a fixed cylinder and a reinforcing plate.

[0013] This invention also extends the insertion rod into the insertion hole to fix the mounting cylinder inside the fixing cylinder. By pushing the sliding cylinder, the connecting rod moves in the sliding groove and drives the insertion rod to disengage from the insertion hole, thus disassembling the top head body. This effectively reduces the difficulty of disassembling the top head body. At the same time, the elastic force of the spring pushes the connecting rod to move in the sliding groove, ensuring the stability of the top head body and preventing the top head from loosening under long-term perforation vibration and rotation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the top body structure of this utility model.

[0018] In the diagram: 1. Top head body; 2. Connecting rod; 3. Infusion pipe; 4. Cooling chamber; 5. Fixing rod; 6. Inlet pipe; 7. Reinforcing plate; 8. Drain outlet; 9. Return chamber; 10. Insulation layer; 11. Mounting cylinder; 12. Insertion hole; 13. Fixing cylinder; 14. Insertion rod; 15. Sliding cylinder; 16. Sliding rod; 17. Sliding groove; 18. Spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides a technical solution: a highly stable, heat-resistant, and wear-resistant perforation mandrel, comprising a mandrel body 1, with a through-groove extending to the bottom inside the mandrel body 1, and a cooling cavity 4 inside the mandrel body 1. The cooling cavity 4 is an annular groove. The center of the mandrel body 1 is fixedly connected to a fixing rod 5, and the outer side of the fixing rod 5 is fixedly connected to several reinforcing plates 7. The bottom surface of the fixing rod 5 is in contact with the upper surface of the connecting rod 2. The fixing rod 5 and the reinforcing plates 7, together with the connecting rod 2, effectively enhance the strength of the mandrel body 1, preventing the stress reduction caused by the internal cooling cavity 4. The reinforcing plates 7 ensure the stability of the mandrel body 1 during the perforation process.

[0021] A connecting rod 2 is installed at the bottom of the top body 1. A liquid inlet pipe 3 is opened inside the connecting rod 2, and an inlet pipe 6 is connected to the liquid inlet pipe 3. The liquid inlet pipe 3 is connected to the cooling chamber 4 through the inlet pipe 6. The connecting rod 2 is fixedly connected to the mounting base. Drain outlets 8 are opened on the inner wall of the top body 1, arranged in a circular array on the inner wall of the cooling chamber 4. The liquid inlet pipe 3 is fixedly connected to the output end of a water supply device. Coolant is introduced into the cooling chamber 4 through the liquid inlet pipe 6 via the liquid inlet pipe 3, thereby cooling the heat inside the top body 1. The liquid then enters the top body 1 through the drain outlets 8, then flows into the return chamber 9 and is discharged. Coolant circulation is achieved through the liquid inlet pipe 3 and the return chamber 9.

[0022] A reflux chamber 9 is provided inside the connecting rod 2, located outside the infusion pipe 3. A heat insulation layer 10 is also provided inside the connecting rod 2, located between the infusion pipe 3 and the reflux chamber 9. The heat insulation layer 10 effectively prevents heat exchange between the infusion pipe 3 and the reflux chamber 9 during cooling, allowing the infusion pipe 3 to deliver cooler fluid and the reflux chamber 9 to promptly discharge high-temperature coolant. The cooperation between the infusion pipe 3 and the reflux chamber 9 ensures that the coolant inlet and outlet are both located at one end of the connecting rod 2, not on the side of the mandrel body 1 and the connecting rod 2. Therefore, the coolant inlet and outlet pipes will not affect the processing effect of the mandrel body 1 on the seamless steel pipe.

[0023] The bottom of the top body 1 is welded and fixed to the heat insulation layer 10. The outer side of the connecting rod 2 is welded and fixed to the fixing cylinder 13. Several circular through holes are opened on the side of the fixing cylinder 13. The fixing cylinder 13 slides and engages with the outer side of the insertion rod 14 through the circular through holes. One end of the insertion rod 14 is movably inserted into the insertion hole 12. The other end of the insertion rod 14 is provided with a sliding groove 17. The sliding groove 17 is an inclined groove. The sliding rod 16 slides and engages with the sliding cylinder 16 inside the sliding groove 17. The sliding cylinder 15 is sleeved on the outer side of the fixing cylinder 13. The two ends of the spring 18 are connected and fixed to the fixing cylinder 13 and the sliding cylinder 15 respectively. By moving the sliding cylinder 15 upward, the sliding rod 16 slides inside the sliding groove 17, thereby moving the insertion rod 14 and disengaging it from the insertion hole 12. Then, the mounting cylinder 11 is inserted into the fixing cylinder 13. The spring force of the spring 18 causes the sliding cylinder 15 to move downward.

[0024] A sliding cylinder 15 is fitted onto the outer side of the connecting rod 2. A circular through hole is formed in the center of the sliding cylinder 15. The sliding cylinder 15 slides through the circular through hole and is slidably engaged with the outer side of the connecting rod 2. The sliding cylinder 15 is welded and fixed to both ends of the sliding rod 16. A spring 18 is installed inside the sliding cylinder 15.

[0025] The top body 1 is inserted into the outer side of the connecting rod 2 via the mounting cylinder 11. The fixing rod 5 has an inlet pipe 6 inside, and the drain port 8 is connected to the return chamber 9. Several insertion holes 12 are opened on the outer side of the mounting cylinder 11, and the insertion holes 12 are inserted into the insertion rod 14. The outer side of the insertion rod 14 is provided with a sliding groove 17, and the inside of the sliding groove 17 is in sliding engagement with the sliding rod 16.

[0026] Working principle: In use, one end of the connecting rod 2 is connected and fixed to the mounting base. Moving the sliding cylinder 15 upward causes the sliding rod 16 to slide inside the sliding groove 17, thereby moving the insertion rod 14 and making way for the clearance hole. Then, the mounting cylinder 11 is inserted into the fixed cylinder 13. The spring force of the spring 18 causes the sliding cylinder 15 to move downward, simultaneously ensuring that the sliding rod 16 secures the insertion rod 14 inside the insertion hole 12. This effectively reduces the difficulty of disassembling and replacing the mandrel body 1, and also prevents the mandrel body 1 from affecting processing or causing loosening when rotating or vibrating.

[0027] During the processing of the mandrel body 1, a large amount of heat is generated. Coolant is introduced from the liquid delivery pipe 3 through the liquid inlet pipe 6 into the cooling chamber 4. After cooling, it flows into the return chamber 9 from the drain outlet 8, realizing the circulation of coolant and avoiding the decrease in stability of the mandrel body 1 due to long-term high-temperature operation.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-resistant and wear-resistant perforated mandrel with high stability, comprising a mandrel body (1), characterized in that: The top body (1) is provided with a connecting rod (2) at the bottom. An infusion tube (3) is opened inside the connecting rod (2). A cooling chamber (4) is opened inside the top body (1). The inner wall of the top body (1) is fixedly connected to a fixing rod (5). The outer side of the fixing rod (5) is fixedly connected to a reinforcing plate (7). A drain outlet (8) is opened on the inner wall of the top body (1). A return chamber (9) is provided inside the connecting rod (2). The bottom of the top body (1) is fixedly connected to a heat insulation layer (10). The outer side of the connecting rod (2) is fixedly connected to a fixing cylinder (13). An insert rod (14) is provided on the fixing cylinder (13). A slide cylinder (15) is provided on the outer side of the connecting rod (2). The slide cylinder (15) is fixedly connected to both ends of the slide rod (16). A spring (18) is provided inside the slide cylinder (15).

2. The heat-resistant and wear-resistant perforated mandrel with high stability according to claim 1, characterized in that: The top body (1) is inserted into the outer side of the connecting rod (2) through the mounting cylinder (11), and the bottom surface of the fixing rod (5) is in contact with the upper surface of the connecting rod (2).

3. The heat-resistant and wear-resistant perforated mandrel with high stability according to claim 2, characterized in that: The fixing rod (5) is provided with an inlet pipe (6), which is connected to the delivery pipe (3). The delivery pipe (3) is connected to the cooling chamber (4) through the inlet pipe (6). The drain outlets (8) are arranged in a circular array on the inner wall of the cooling chamber (4).

4. The heat-resistant and wear-resistant perforated mandrel with high stability according to claim 2, characterized in that: The drain outlet (8) is connected to the return chamber (9), which is located outside the infusion tube (3). The connecting rod (2) is provided with a heat insulation layer (10), which is located between the infusion tube (3) and the return chamber (9).

5. The heat-resistant and wear-resistant perforated mandrel with high stability according to claim 2, characterized in that: The mounting cylinder (11) has several insertion holes (12) on its outer side, and the insertion holes (12) are connected to the insertion rod (14).

6. The heat-resistant and wear-resistant perforated mandrel with high stability according to claim 5, characterized in that: The outer side of the insertion rod (14) is provided with a sliding groove (17), and the inside of the sliding groove (17) is in sliding cooperation with the sliding rod (16).

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