Ejector head structure for steel pipe perforating machine

Abstract

The utility model discloses an ejector head structure for a steel pipe puncher, which relates to the technical field of puncher ejector heads, and is characterized in that a first flow guide cavity is formed in one side, opposite to a partition plate, in a machine head of the ejector head, and a second flow guide cavity is formed in the other side, opposite to the partition plate, in the machine head of the ejector head; a cooling cavity opposite to the two-way valve is formed in one side of the seat face of the cooling flange seat, and a backflow cavity opposite to the two-way valve is formed in the other side of the seat face of the cooling flange seat. According to the design, a cooling channel and a backflow channel in the ejector rod assembly serve as circulating pipelines of cooling liquid, under the condition that the cooling valve assembly and the ejector head assembly are integrally installed, the cooling liquid is pumped through the cooling valve assembly and conveyed into the ejector head assembly through the cooling channel, and the circulating cooling effect is achieved through circulating flow guiding of two sets of flow guiding cavities in the ejector head assembly; and then the cooling liquid after heat exchange circularly flows back through the backflow channel, the circulating cooling effect of the top head structure is achieved, and the dynamic cooling effect of the top head structure is better.

Description

Technical Field

[0001] The utility model relates to the field of piercing machine plugs, in particular to a plug structure for steel pipe piercing machines. Background Art

[0002] The steel pipe piercing machine is the first process in the seamless steel pipe production line. It forms the initial shape of the pipe wall by piercing holes in the steel billet to ensure the accurate size of the steel pipe. The piercing machine can produce different types of steel pipes according to different specifications of plugs to meet various production needs. Therefore, the piercing machine plug is an important component of the steel pipe piercing machine. As shown in a piercing machine plug mold for corrosion-resistant seamless steel pipe production disclosed in the China Patent Network (public announcement number CN214767797U), the plug of this type of device, when in use, connects the liquid inlet and liquid outlet to a circulating pump to realize the circulation of the coolant, and then cools the plug by introducing coolant into the cooling and heat dissipation flow channel, thereby achieving the purpose of cooling and avoiding the plug from being deformed and damaged due to high temperature.

[0003] However, the aforementioned patented plugs and existing steel pipe piercer plugs still have some shortcomings. Existing plugs employing a single flow channel have poor conductivity for the circulation of coolant, making it impossible to effectively conduct away the mechanical heat generated during steel pipe piercing. Therefore, those skilled in the art have provided a plug structure for a steel pipe piercer to address the issues raised in the aforementioned background art. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a plug structure for a steel pipe piercing machine, which solves the problem in the prior art that the existing steel pipe piercing machine plug has poor heat conduction efficiency in cooling the mechanical heat generated by piercing.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a plug structure for a steel pipe piercing machine, comprising a push rod assembly, a plug assembly installed at one end of an arm of the push rod assembly, and a cooling valve assembly installed at the other end of the arm of the push rod assembly;

[0006] The ejector assembly includes an ejector, wherein a plurality of cooling channels are arranged on one side of the ejector core, and a plurality of return channels are arranged on the other side of the ejector core;

[0007] The mandrel assembly includes a mandrel, and a partition plate is provided in the middle of the mandrel head. A first guide cavity is provided inside the mandrel head on one side facing the partition plate, and a second guide cavity is provided inside the mandrel head on the other side facing the partition plate.

[0008] The cooling valve assembly includes a cooling flange seat, and a two-way valve is provided on one side of the plate seat of the cooling flange seat, a cooling cavity opposite to the two-way valve is opened on one side of the seat surface of the cooling flange seat, and a reflux cavity opposite to the two-way valve is opened on the other side of the seat surface of the cooling flange seat.

[0009] As a further technical solution of the present invention: the cooling cavity and the reflux cavity are respectively connected to the cooling channel and the reflux channel.

[0010] As a further technical solution of the present invention: a plurality of groups of cooling channels and return channels are arranged circumferentially relative to the core rod of the ejector assembly.

[0011] As a further technical solution of the present invention: the first guide cavity and the second guide cavity are respectively connected to the cooling channel and the return channel, and one end of the plate frame of the partition plate is provided with a return flow hole connected to the first guide cavity and the second guide cavity.

[0012] As a further technical solution of the present invention: a threaded sleeve is provided at the tail end of the head of the mandrel, and an inner threaded sleeve adapted to the threaded sleeve is provided at one end of the core rod of the mandrel in an embedded form.

[0013] As a further technical solution of the present invention: a center plug rod is provided in the middle of the tail end of the mandrel, and a center plug hole adapted to the center plug rod is opened at one end of the core rod of the mandrel.

[0014] As a further technical solution of the present invention: the other end of the core rod of the push rod is provided with a parallel flange seat adapted to the cooling flange seat.

[0015] The utility model provides a plug structure for a steel pipe punching machine, which has the following beneficial effects compared with the prior art:

[0016] The steel pipe piercing machine plug of this design is based on the cooling channel and the reflux channel in the push rod assembly as the circulation flow pipeline of the coolant. With the integrated installation of the cooling valve assembly and the plug assembly, the coolant is pumped through the cooling valve assembly and transported to the plug assembly through the cooling channel. The circulating diversion through the two sets of guide cavities in the plug assembly achieves a circulating cooling effect. The coolant after heat exchange is then circulated back through the reflux channel to achieve a circulating cooling effect of the plug structure. Its dynamic cooling effect is better, which can effectively reduce the heat during piercing and increase the service life of the plug structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the plug used in a steel pipe piercing machine;

[0018] Figure 2 This is a first expanded schematic diagram of the plug structure for a steel pipe piercing machine;

[0019] Figure 3 This is a second expanded schematic diagram of the plug structure for a steel pipe piercing machine;

[0020] Figure 4 It is a structural schematic diagram of the plug assembly in the plug structure for a steel pipe piercing machine;

[0021] Figure 5 This is a schematic diagram of the structure of the cooling valve assembly in the plug structure of the steel pipe piercing machine.

[0022] In the figure: 1. Ejector rod assembly; 11. Ejector rod; 12. Parallel flange seat; 13. Cooling channel; 14. Return channel; 15. Center plug hole; 16. Inner threaded sleeve; 2. Ejector head assembly; 21. Ejector head; 22. Partition plate; 23. Return flow hole; 24. Center plug rod; 25. First guide chamber; 26. Second guide chamber; 27. Threaded sleeve; 3. Cooling valve assembly; 31. Cooling flange seat; 32. Cooling chamber; 33. Return chamber; 34. Two-way valve. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The utility model provides a technical solution for a plug structure of a steel pipe punching machine: a plug structure for a steel pipe punching machine, comprising a push rod assembly 1, a plug assembly 2 installed at one end of the arm of the push rod assembly 1, and a cooling valve assembly 3 installed at the other end of the arm of the push rod assembly 1. The push rod assembly 1 comprises a push rod 11, the plug assembly 2 comprises a plug head 21, a threaded sleeve 27 is provided at the tail end of the head of the plug head 21, one end of the core rod of the push rod 11 is provided with an inner threaded sleeve 16 adapted to the threaded sleeve 27 in an embedded form, a center plug rod 24 is provided in the middle of the tail end of the plug head 21, and a center plug rod 24 is provided at one end of the core rod of the push rod 11 with a center plug hole 15 adapted to the center plug rod 24. By utilizing the threaded combination of the threaded sleeve 27 and the inner threaded sleeve 16, and under the arm force guidance of the center plug rod 24 and the center plug hole 15, the plug head assembly 2 and the push rod assembly 1 can be fixedly connected by thread. Subsequently, the plug head assembly 2 can be disassembled, replaced, and maintained by simply twisting.

[0025] The other end of the core rod of the push rod 11 is provided with a parallel flange seat 12 that is compatible with the cooling flange seat 31. By utilizing the adaptation of the parallel flange seat 12 and the cooling flange seat 31, the cooling valve assembly 3 is installed on the push rod assembly 1 as a circulating pumping valve for the coolant.

[0026] A plurality of cooling channels 13 are arranged on one side of the core rod of the ejector pin 11, and a plurality of return channels 14 are arranged on the other side of the core rod of the ejector pin 11. The plurality of cooling channels 13 and return channels 14 are arranged circumferentially relative to the core rod of the ejector pin assembly 1. By arranging relative cooling channels 13 and return channels 14 inside the core rod of the ejector pin assembly 1, on the one hand, they can serve as circulating return pipes for the coolant, thereby achieving an orderly circulation and diversion effect of the coolant, and on the other hand, they can quickly and efficiently cool down the heat of the ejector pin assembly 1 itself.

[0027] The cooling valve assembly 3 includes a cooling flange seat 31, and a two-way valve 34 is provided on one side of the plate seat of the cooling flange seat 31. A cooling cavity 32 opposite to the two-way valve 34 is opened on one side of the seat surface of the cooling flange seat 31, and a reflux cavity 33 opposite to the two-way valve 34 is opened on the other side of the seat surface of the cooling flange seat 31. The cooling cavity 32 and the reflux cavity 33 are respectively connected and opposite to the cooling channel 13 and the reflux cavity 33 are connected and opposite to the reflux cavity 14. By connecting the cooling cavity 32 to the cooling channel 13 and the reflux cavity 33 to the reflux cavity 14, and under the conduction of the two-way valve 34, the coolant can be pumped into the mandrel assembly 2 through the combination of the cooling cavity 32 and the cooling channel 13, thereby achieving a cooling and cooling effect of the mandrel assembly 2, and the coolant after cooling can be refluxed through the combination of the reflux cavity 33 and the reflux cavity 14, thereby forming a dynamic cycle cooling and cooling performance, thereby improving the cooling performance.

[0028] A partition plate 22 is provided in the middle of the head of the mandrel 21, and a first guide cavity 25 is provided inside the head of the mandrel 21 on one side facing the partition plate 22, and a second guide cavity 26 is provided inside the head of the mandrel 21 on the other side facing the partition plate 22. The first guide cavity 25 and the second guide cavity 26 are respectively connected to the cooling channel 13 and the return channel 14, and a return flow hole 23 connected to the first guide cavity 25 and the second guide cavity 26 is arranged at one end of the plate frame of the partition plate 22. By arranging the partition plate 22 in the mandrel assembly 2, the mandrel is divided into the first guide cavity 25 and the second guide cavity 26 connected to the cooling channel 13 and the return channel 14, and under the conduction of the return flow hole 23, the coolant flowing into the mandrel assembly 2 can be circulated and guided, forming a cooling effect in the form of dynamic flow.

[0029] The working principle of the utility model is as follows: when the steel pipe punching machine head is installed and used, based on the adaptation of the flange seat 12 and the cooling flange seat 31, the cooling valve assembly 3 is installed on the push rod assembly 1 to serve as a circulating pumping valve for the coolant, and the threaded combination of the threaded sleeve 27 and the inner threaded sleeve 16 is synchronously used to install the head assembly 2 on the push rod assembly 1 to serve as a punching head for punching steel pipes;

[0030] When the steel pipe is subsequently perforated by the plug structure, the coolant can be pumped into the cooling channel 13 through the combination of the two-way valve 34 and the cooling cavity 32 based on the pumping of the cooling pump, and then circulated into the plug assembly 2 to achieve a cooling effect. In addition, by utilizing the conductive combination of the first guide cavity 25 and the second guide cavity 26 in the plug assembly 2, the coolant in the plug assembly 2 is dynamically conductively flowed, circulated back through the reflux channel 14, and circulated back under the combination of the reflux cavity 33 and the two-way valve 34, forming a dynamic flow form of circulating cooling, effectively reducing the heat of the plug structure during perforation, and improving the service life of the plug structure.

[0031] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A plug structure for a steel pipe piercing machine, characterized in that: It comprises a push rod assembly (1), a push head assembly (2) installed at one end of an arm of the push rod assembly (1), and a cooling valve assembly (3) installed at the other end of the arm of the push rod assembly (1); The ejector assembly (1) comprises an ejector (11), wherein a plurality of cooling channels (13) are arranged on one side of a core rod of the ejector (11), and a plurality of return channels (14) are arranged on the other side of the core rod of the ejector (11); The mandrel assembly (2) includes a mandrel (21), and a partition plate (22) is provided in the middle of the mandrel head (21); a first guide cavity (25) is provided inside the mandrel head of the mandrel (21) on one side facing the partition plate (22); and a second guide cavity (26) is provided inside the mandrel head of the mandrel (21) on the other side facing the partition plate (22); The cooling valve assembly (3) includes a cooling flange seat (31), and a two-way valve (34) is provided on one side of the plate seat of the cooling flange seat (31); a cooling cavity (32) opposite to the two-way valve (34) is provided on one side of the seat surface of the cooling flange seat (31), and a reflux cavity (33) opposite to the two-way valve (34) is provided on the other side of the seat surface of the cooling flange seat (31).

2. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: The cooling cavity (32) and the reflow cavity (33) are respectively connected to the cooling channel (13) and the reflow channel (14).

3. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: The plurality of cooling channels (13) and return channels (14) are arranged circumferentially relative to the core rod of the ejector assembly (1).

4. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: The first guide cavity (25) and the second guide cavity (26) are respectively connected to the cooling channel (13) and the return channel (14), and a return flow hole (23) connected to the first guide cavity (25) and the second guide cavity (26) is arranged at one end of the plate frame of the partition plate (22).

5. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: The tail end of the head of the mandrel (21) is provided with a threaded sleeve (27), and one end of the core rod of the mandrel (11) is provided with an inner threaded sleeve (16) adapted to the threaded sleeve (27) in an embedded form.

6. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: A central insertion rod (24) is provided at the middle of the tail end of the mandrel (21), and a central insertion hole (15) adapted to the central insertion rod (24) is provided at one end of the core rod of the mandrel (11).

7. The plug structure for a steel pipe piercing machine according to claim 1, characterized in that: The other end of the core rod of the push rod (11) is provided with a flange seat (12) adapted to the cooling flange seat (31).

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