WO2022088449A1

WO2022088449A1 - In-mold cooling shaft for welding roll used in high-frequency pipe making, and cooling device for welding roll used in high-frequency pipe making

Info

Publication number: WO2022088449A1
Application number: PCT/CN2020/138301
Authority: WO
Inventors: 林建维
Original assignee: 璋全五金制品(昆山)有限公司
Priority date: 2020-10-26
Filing date: 2020-12-22
Publication date: 2022-05-05
Also published as: CN214185807U

Abstract

An in-mold cooling shaft for a welding roll used in high-frequency pipe making. The in-mold cooling shaft is internally provided with a cooling water input flow channel leading to one end of the cooling shaft, and a cooling water output flow channel leading to the other end of the cooling shaft, wherein a water inlet of the cooling water input flow channel and a water outlet of the cooling water output flow channel are respectively located in respective corresponding end faces. Two end faces of the cooling shaft are provided with water pipe connecting nozzles, which are in communication with the water inlet of the cooling water input flow channel and the water outlet of the cooling water output flow channel, and a water outlet of the cooling water input flow channel and a water inlet of the cooling water output flow channel are both located in a side face of the cooling shaft. A welded pipe cooling device using the in-mold cooling shaft has the effect of cooling a welding roll mold and a bearing. Severe losses caused by high-temperature damage to the mold and shutdown can be avoided; and cooling water circulates in the mold, and as such, a molten weld pass can also be prevented from coming into contact with the cooling water during welding. Therefore, the toughness of the weld pass is improved, and the production quality is stabilized.

Description

A high-frequency pipe-making welding roll cooling shaft and a high-frequency pipe-making welding roll cooling device

technical field

The utility model relates to the technical field of steel pipe processing, in particular to an inner cooling shaft of a high-frequency pipe-making welding roll mold and a high-frequency pipe-making welding roll cooling device.

Background technique

During the welding of ERW high-frequency pipe, the molten material is extruded and solidified through the extrusion roller and the welding roller, thereby achieving the effect of welding the steel pipe. The weld bead brought into the molten state after welding is likely to cause the weld bead in the high temperature state to be quenched immediately, and the material will form a hard and brittle structure, which is likely to reduce the toughness of the weld bead and cause serious weld bead cracking during product quality inspection.

In order to solve the problem that the cooling water directly contacts the molten weld bead, the existing ERW pipe is fixed between the welding head and the welding roller with cotton cloth, and the cooling water is sprayed on the cloth, and the welding roller is cooled through the wet cloth. It is difficult to quantify the amount of cooling, which makes the welding roller and its internal bearings easy to burn and damage, and there is also the problem of continuous production line shutdown, resulting in serious loss of materials and equipment amortization. Therefore, the existing EWR pipe welding passes There is a need for a cooling method that avoids cooling water from being sprayed on the weld bead and does not cause overheating of the welding roll and bearing.

Utility model content

In view of the above technical problems, the present utility model provides a high-frequency tube-making and welding roll cooling shaft, and a tube-making and welding roll cooling device using the in-mold cooling shaft. It cooperates with the bearing to cool down the welding roll mold and the bearing internally, which improves the toughness of the weld bead and stabilizes the production quality.

To achieve the above object, the utility model adopts the following technical scheme:

An in-mold cooling shaft for a high-frequency tube-making welding roll is provided with a cooling water inlet channel leading to one end of the cooling shaft and a cooling water outlet channel leading to the other end of the cooling shaft. The water inlet of the water inlet channel and the water outlet of the cooling water outlet channel are respectively located on their respective end faces, and the two ends of the cooling shaft are provided with a water inlet of the cooling water inlet channel and the water outlet of the cooling water outlet channel. The water pipe is connected to the nozzle, and the cooling water inlet and outlet of the cooling water outlet and the inlet of the cooling water outlet are both located on the side of the cooling shaft.

Further, the water pipe joints on both ends of the in-mold cooling shaft are located at the center of the end face.

Further, the water pipe joint is integrally formed with the in-mold cooling shaft.

Further, the cooling water inlet channel and the cooling water outlet channel are located in the same longitudinal section of the cooling shaft in the mold, and the cooling water inlet channel outlet and the cooling water outlet channel outlet are located on the same side of the longitudinal section.

Further, the cooling water inlet channel and the cooling water outlet channel are located in the same longitudinal section of the cooling shaft in the mold, and the cooling water inlet channel outlet and the cooling water outlet channel outlet are located on opposite sides of the longitudinal section.

Further, the cooling water inlet channel and the cooling water outlet channel are located in different longitudinal sections of the cooling shaft in the mold.

The welding tube cooling device using the above-mentioned in-mold cooling shaft includes a welding roller and an in-mold cooling shaft. The welding roller is sleeved on the bearing in-mold cooling shaft, and the two ends are fixedly connected by bearings. The shaft diameter of the in-mold cooling shaft is Smaller than the diameter of the welding roller, there is a closed annular space between the bearings at both ends, which is enclosed by the inner wall of the welding roller, the side surface of the cooling shaft in the mold, and the inner side wall of the bearings at both ends. The water outlet and the water outlet of the cooling water outlet channel are arranged on the side surface of the cooling shaft in the mold in the annular space.

The cooling water channel is added inside the cooling shaft of the high-frequency pipe-making welding roller mold of the utility model, which has the effect of reducing the temperature of the welding roller mold and the bearing, and not only avoids the high temperature damage of the mold and the serious loss caused by the shutdown, but also the cooling water circulates in the mold. Internally, it will not cause the molten weld bead to contact the cooling water during welding, which improves the toughness of the weld bead and stabilizes the production quality; because the general water pipe joint must be processed with internal threads at the fixed place, and then use waterproof tape to fasten it at the processing place. , In this design, the cooling shaft in the mold is designed to simultaneously consider the convenience and practicality, and the water inlet and the body are designed as an integrated water pipe nozzle, which not only prevents the risk of the nozzle from loosening, but also avoids the use of waterproof tape, which has a low melting point. The risk of water leakage failure Compared with the solid shaft, the utility model adds a cooling water flow channel in the middle, so the force capacity of the cooling shaft in the mold is analyzed, and it is confirmed that the cooling shaft in the mold has a good force effect. The cooling shaft in the utility model not only To achieve the cooling effect of the mold and bearing, and has a good bearing capacity design.

Description of drawings

1 is a schematic structural diagram of a welded pipe cooling device using the in-mold cooling shaft described in the embodiment of the present invention;

[Corrected 14.01.2021 in accordance with Rule 91]
Figures 2-13 are schematic structural diagrams of different forms of in-mold cooling shafts described in the embodiments of the present invention.

Among them, 1-in-mold cooling shaft, 2-welding roller, 3-bearing, 4-water pipe joint, 11-cooling water inlet channel, 12-cooling water outlet channel.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Example

As shown in FIG. 1 , a cooling device for a welded pipe includes a welding roller 2 and an in-mold cooling shaft 1 . The welding roller 2 is sleeved on the cooling shaft 1 in the bearing mold, and the two ends are fixedly connected by bearings 3 . The shaft diameter of the in-mold cooling shaft 1 is smaller than the inner hole diameter of the welding roller 2, and between the bearings 3 at both ends there is a closed annular space enclosed by the inner wall of the welding roller 2, the side surface of the in-mold cooling shaft 1 and the inner side walls of the bearings 3 at both ends. , the cooling water inlet channel 11 and the cooling water outlet channel 12 on the in-mold cooling shaft 1 are arranged on the side of the in-mold cooling shaft 1 located in the annular space; the in-mold cooling shaft 1 There is a cooling water inlet channel 11 leading to one end of the cooling shaft and a cooling water outlet channel 12 leading to the other end of the cooling shaft. The cooling water inlet channel 11 and the cooling water outlet 12 are located at the The respective corresponding end faces are respectively connected with the water pipe joints 4 located at the center positions of the two end faces of the in-mold cooling shaft 1 , and the water pipe joints 4 are integrally formed with the in-mold cooling shaft 1 .

In some embodiments, as shown in FIG. 2 and FIG. 3 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in the same longitudinal section of the in-mold cooling shaft 1 , and the cooling water inlet channel 11 has a water outlet. The outlet of the cooling water outlet channel 12 is located on the opposite side of the longitudinal section, and one of the cooling water inlet channel 11 and the cooling water outlet channel 12 is located at the upper left, and the other is located at the lower right.

In some embodiments, as shown in FIG. 4 and FIG. 5 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in the same longitudinal section of the cooling shaft 1 in the mold, and the cooling water inlet channel 11 has a water outlet. The outlet of the cooling water outlet channel 12 is located on the opposite side of the longitudinal section. One of the cooling water inlet channel 11 and the cooling water outlet channel 12 is located at the upper right and the other is located at the lower left.

In some embodiments, as shown in FIG. 6 and FIG. 7 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in the same longitudinal section of the cooling shaft 1 in the mold, and the cooling water inlet channel 11 has a water outlet. The outlet of the cooling water outlet channel 12 is located on the same side of the longitudinal section, one of the cooling water inlet channel 11 and the cooling water outlet channel 12 is located at the upper left and the other is located at the upper right.

In some embodiments, as shown in FIGS. 8 and 9 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in the same longitudinal section of the cooling shaft 1 in the mold, and the cooling water inlet channel 11 has a water outlet. The outlet of the cooling water outlet channel 12 is located on the same side of the longitudinal section. One of the cooling water inlet channel 11 and the cooling water outlet channel 12 is located at the lower right and the other is located at the lower left.

[Corrected 14.01.2021 in accordance with Rule 91]
In some embodiments, as shown in FIGS. 10-11 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in the same longitudinal section of the in-mold cooling shaft 1, and the cooling water inlet channel 11 has a water outlet direction. The water outlet direction of the cooling water outlet channel 12 is perpendicular to the longitudinal section.

[Corrected 14.01.2021 in accordance with Rule 91]
In some embodiments, as shown in FIGS. 12-13 , the cooling water inlet channel 11 and the cooling water outlet channel 12 are located in different longitudinal sections of the in-mold cooling shaft 1 .

The in-mold cooling shaft 1 passes through the inner hole of the welding roll 2, and the two ends of the center of the welding roll 2 are fixedly connected to the in-mold cooling shaft 1 through two bearings 3. Between the two bearings 3, after the in-mold cooling shaft 1 penetrates It forms an annular closed space with the inner wall of the welding roll and the inner end wall of the bearing 3. As shown by the oblique line in Figure 2, the in-mold cooling is carried out in the annular space, and the cooling water enters the annular space through the cooling water inlet channel. The amount of water in the space reaches the height of the outlet of the cooling water outlet channel. After cooling, it is sprayed out through the cooling water outlet channel. The cooling water can not only contact the inner ring of the cooling mold, but also contact the bearings 3 on both sides of the cooling space. Due to natural overflow And the water pressure makes it spray out from the water outlet after cooling, and then infinitely circulates to achieve cooling in the mold.

Through the advanced CAE simulation analysis technology, the heat flow analysis module can achieve the effect of cooling in the mold of various distributed runners. When the mold temperature setting is tightened to 1200°C, the inlet water temperature is 35°C at room temperature, and the outlet water temperature is 35°C. When the temperature is 65°C, the temperature of the mold and bearing drops from 1200°C to 195°C, which is far lower than the heating temperature of the steel, which proves that this design achieves a good cooling effect.

Compared with the solid shaft in this design, the cooling water flow channel is added in the middle of the cooling medium of the present invention, so the force analysis module in the CAE simulation analysis is also used, and the force value of 3 tons is tightened at the bottom, and the cooling shaft in the mold is only The stress value of 72MPa is generated, which proves that the in-mold cooling shaft of the present invention can achieve a good stress effect.

It is confirmed by the above heat flow and force simulation analysis results that the welding roller cooling device using the in-mold cooling shaft of the present invention not only achieves the cooling effect of the mold and the bearing, but also has a good bearing capacity design.

It should be understood by those of ordinary skill in the art: the above are only specific embodiments of the present utility model, and are not intended to limit the present utility model. All within the spirit and principle of the present utility model, any modifications made, equivalent to Replacement, improvement, etc., should all be included within the protection scope of the present invention.

Claims

An in-mold cooling shaft for a high-frequency tube welding roll is characterized in that a cooling water inlet channel leading to one end of the cooling shaft and a cooling water outlet channel leading to the other end of the cooling shaft are arranged inside the inner-mold cooling shaft , the cooling water inlet channel and the cooling water outlet channel are respectively located on their respective end faces, and both ends of the cooling shaft are provided with the cooling water inlet channel and the cooling water outlet channel. A water pipe joint connected to the water outlet, the cooling water inlet and outlet of the cooling water outlet and the inlet of the cooling water outlet are both located on the side of the cooling shaft.
The in-mold cooling shaft of a high-frequency tube welding roll according to claim 1, wherein the water pipe joints on both ends of the in-mold cooling shaft are located at the center of the end face.
The in-mold cooling shaft of a high-frequency pipe welding roll according to claim 1, wherein the water pipe joint and the in-mold cooling shaft are integrally formed.
The in-mold cooling shaft of a high-frequency pipe welding roll according to any one of claims 1-3, wherein the cooling water inlet channel and the cooling water outlet channel are located at the same point of the cooling axis in the mold. In the longitudinal section, the outlet of the cooling water inlet channel and the outlet of the cooling water outlet channel are located on the same side of the longitudinal section.
The in-mold cooling shaft of a high-frequency pipe welding roll according to any one of claims 1-3, wherein the cooling water inlet channel and the cooling water outlet channel are located at the same point of the cooling axis in the mold. In the longitudinal section, the outlet of the cooling water inlet channel and the outlet of the cooling water outlet channel are located on opposite sides of the longitudinal section.
The in-mold cooling shaft of a high-frequency tube welding roll according to any one of claims 1-3, wherein the cooling water inlet channel and the cooling water outlet channel are located at different positions in the in-mold cooling axis. in longitudinal section.
The cooling device for the welded pipe using the in-mold cooling shaft according to any of the above claims includes a welding roller and an in-mold cooling shaft, the welding roller is sleeved on the bearing in-mold cooling shaft, and the two ends are fixedly connected by bearings. It is characterized in that the shaft diameter of the cooling shaft in the mold is smaller than the diameter of the welding roller, and there is a closed annular space surrounded by the inner wall of the welding roller, the side surface of the cooling shaft in the mold and the inner side walls of the bearings at both ends between the bearings at both ends. The cooling water inlet and outlet of the cooling water flow passage and the outlet of the cooling water outlet flow passage on the cooling shaft in the mould are arranged on the side surface of the cooling shaft in the mould in the annular space.