Self-lubricating and shape-giving inner core device suitable for cold rolling of stainless steel pipes using hydrogen energy

Abstract

The present invention discloses a self-lubricating and forming inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy, comprising an inner forming core and a self-lubricating arrangement attached to one end of the inner forming core, wherein a flow channel is arranged on the inside of the inner forming core and several lubricating fluid holes are arranged on the surface of the inner forming core, wherein several lubricating fluid holes increase stepwise along the inner diameter of one end away from the self-lubricating arrangement, wherein the self-lubricating arrangement comprises a pump box, a fluid storage tank, a diverting valve assembly and a movable shaft assembly as well as several movable partitions on the inside of the pump box, wherein one side of the pump box is fixedly connected to a guide cap.The design of the self-lubricating and forming inner core device in the present invention ensures that the lubricating fluid is distributed evenly and continuously on the surface of the inner core, particularly at the end furthest from the lubrication source. Optimizing the distribution and size of the lubricating fluid holes significantly improves the lubrication between the inner core and the inner wall of the stainless steel tube, thereby reducing friction and wear during processing and improving the accuracy and surface quality of the stainless steel tube during cold rolling.

Description

TECHNICAL AREA

[0001] The present invention relates to the technical field of the cold rolling core for stainless steel tubes, in particular to a self-lubricating and shape-giving inner core device suitable for the cold rolling processing of stainless steel tubes using hydrogen energy. STATE OF THE ART

[0002] As a key industrial material, seamless stainless steel pipes are widely used in the petroleum, chemical, energy, and aerospace industries. To meet the stringent requirements of these high-end applications, the manufacturing process for seamless stainless steel pipes is continuously evolving towards high precision and quality. Cold rolling technology, particularly the multi-stage cold rolling process, has become a crucial element in the production of seamless stainless steel pipes due to its ability to significantly improve dimensional accuracy and surface finish. When seamless stainless steel pipes are used to transport hydrogen in pipelines, the heat of combustion of hydrogen is only one-third that of natural gas. At the same pressure differential at both ends of the pipeline, the flow rate of hydrogen is three times higher than that of natural gas.Therefore, if hydrogen and natural gas are transported through the same pipeline at the same pressure drop, the energy transported will be the same, but the volume of hydrogen transported will be three times greater than that of natural gas.

[0003] During the cold rolling of stainless steel tubes, a forming core is typically placed inside the tube to support the forming process, ensuring processing accuracy and the quality of the finished product. Conventional forming cores usually have one end connected to a pump system that pumps a lubricating fluid onto the core's surface to reduce friction between the core and the inner wall of the stainless steel tube.

[0004] However, this conventional structure has significant shortcomings in practical application.

[0005] First, the limited length of the forming inner core leads to a decreasing flow rate during the delivery of the lubricating fluid from the pump end to the distal end. This results in an insufficient supply of lubricating fluid to the surface of the inner core furthest from the pump end. This uneven lubrication directly increases the coefficient of friction between the forming inner core at the distal end and the inner wall of the stainless steel tube, significantly increasing wear in this area. Due to the high friction and wear in this region, the service life of the forming inner core is drastically reduced, and manufacturing costs are also increased due to frequent maintenance and replacement.Secondly, uneven lubrication not only affects the service life of the forming core but can also lead to processing defects on the inner wall of the stainless steel tube, compromising the final product quality. This problem is even more pronounced when processing long stainless steel tubes. Conventional pump designs struggle to meet the demands of long-distance, high-precision lubrication, preventing effective improvements in processing stability and reliability. Therefore, there is an urgent need for an improved lubrication system that ensures uniform distribution of the lubricating fluid across the entire surface of the forming core to reduce wear and extend the tool's service life.

[0006] In light of this, existing problems are investigated and improved in order to provide a self-lubricating and shaping inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy, thereby solving the existing problems. The present invention aims to achieve the purpose of solving problems and improving the practical value through the technology. CONTENT OF THE PRESENT INVENTION

[0007] The present invention is based on the objective of solving one of the technical problems existing in the prior art or in related technology.

[0008] For this purpose, the technical solution according to the present invention comprises a self-lubricating and forming inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy, comprising an inner forming core and a self-lubricating arrangement attached to one end of the inner forming core, wherein a flow channel is arranged on the inside of the inner forming core and several lubricating fluid holes are arranged on the surface of the inner forming core, the number of lubricating fluid holes increasing stepwise along the inner diameter of one end away from the self-lubricating arrangement, wherein the self-lubricating arrangement comprises a pump box, a fluid storage tank, a diverting valve assembly, and a movable shaft assembly, as well as several movable partitions on the inside of the pump box, wherein one side of the pump box is fixedly connected to a guide cap.wherein the movable shaft assembly is rotatably installed on the inside of the pump housing and one end is fixedly connected to a rotary shaft valve which is rotatably installed on the inside of the diverter valve assembly, wherein several partial guide holes are arranged on the surface of the diverter valve assembly, which extend through the guide cap and are uniformly distributed circumferentially, wherein the movable partitions are uniformly distributed circumferentially on the inside of the pump housing, wherein one end of the partial guide holes corresponds to and is connected with a gap between adjacent movable partitions, wherein a liquid storage tank is fixedly installed on one side of the pump housing, and wherein a drive motor for driving the rotation of the movable shaft assembly is fixedly installed on the other side of the liquid storage tank.wherein a fluid guide cavity is arranged on the inside of the pump housing, wherein one end of the fluid guide cavity is connected to the inner cavity of the fluid storage tank, wherein a one-way valve body is arranged on one side of the fluid guide cavity, which is associated with and connected to a gap between adjacent movable partitions, wherein a return slot for guiding the movement of the movable partition is arranged on the inside of the pump housing, wherein a pivot pin, which is rotatably installed on the inside of the pump housing, is arranged on one side of the movable partition, wherein one end of the pivot pin is provided with a clockwork spring, the clockwork spring being used to maintain the movable partition in elastic contact with the surface of the movable shaft assembly,wherein the movable shaft assembly is used for eccentric rotation and for pressing the movement of the movable partition onto the inside of the return slot, wherein a valve groove is arranged on the surface of the rotary shaft valve.

[0009] In a preferred example, the present invention can further be configured such that the movable shaft assembly comprises a main shaft, an eccentric wheel, and a stop wheel, wherein the eccentric wheel is mounted on the surface of the main shaft and encased on the inside of the stop wheel, wherein the upper and lower sides of the stop wheel and the upper and lower sides of the movable partition slide against the inner cavity of the pump housing and one side of the guide cap and are thereby sealed, wherein the stop wheel is annular in shape, and wherein the center of the circle of the stop wheel is offset from the axis of the main shaft. Driven by the drive motor, the stop wheel is moved eccentrically by the rotation of the main shaft in order to retract into the interior of the return slot by means of a counteracting deflection movement of the movable partition.Under the action of the clockwork spring, the movable partition can be brought out again to realize the back-and-forth movement of the movable partition.

[0010] In a preferred example, the present invention can further be configured such that the movable partition and the return slot are each arc-shaped and the center of the circle is arranged coaxially with the pivot pin, wherein the clockwork spring is attached to the inside of the liquid storage tank to drive the clockwork spring and the movable partition to rotate, so that one side of the movable partition is always in sliding contact with the surface of the stop wheel. Under the action of the sliding stop between the adjacent movable partitions and the surface of the stop wheel, independent receiving cavities are formed between the adjacent movable partitions. This receiving cavity is used to introduce the lubricating solution into the interior of the liquid storage tank through the liquid guide cavity and the one-way valve body and to discharge it by connecting to the partial guide holes.The change in the receiving cavities between the individual movable partitions is achieved by the eccentric rotation of the movable shaft group in order to realize the pressure injection of oil.

[0011] In a preferred example, the present invention can further be configured such that the fluid guide cavity and the one-way valve body are used to guide the lubricating oil fluid within the fluid storage tank in one direction into the receiving cavity between each adjacent movable partition walls.

[0012] In a preferred example, the present invention can further be configured such that the rotary shaft valve is conical and slides against the inner surface of the deflection valve assembly on its outer circumference to follow the rotation of the movable shaft assembly and to close the end of the partial guide holes, wherein the surface of the rotary shaft valve is notched to drain internal oil fluid from the partial guide holes, and wherein the width of the rotary shaft valve is smaller than the width of the gap between adjacent partial guide holes. As the movable shaft assembly rotates, the receiving cavity between the movable partitions gradually decreases in size, so that the solution inside the receiving cavity is pressurized by the rotary shaft valve under the sealing action of the partial guide holes.When the valve groove rotates into the connection of the partial guide holes, the internal pressure is instantly relieved, so that this part of the oil fluid is diverted by injection and pumped into the interior of the lubrication holes.

[0013] In a preferred example, the present invention can further be configured such that a connecting pipe for introducing lubricating fluid or grease is arranged on one side of the liquid storage tank, wherein a guide bore for connection with the inside of the stop wheel is arranged on the surface of the pump box.

[0014] In a preferred example, the present invention can further be configured such that the inner mold core is a cast iron tubular structure, wherein the number of lubricating fluid holes is multiple and uniformly divided into multiple groups, each group of lubricating fluid holes being uniformly distributed in a circumferential direction on the surface of the inner mold core, the distance between each group of lubricating fluid holes decreasing stepwise in a direction away from the self-lubricating arrangement, so that the lubricating fluid is effectively directed onto the surface of the inner mold core that is furthest from the self-lubricating arrangement, thereby ensuring the uniformity of the distribution of the lubricating fluid on the surface of the inner mold core.

[0015] Advantageous effects achieved by the present invention: 1. The design of the self-lubricating and forming inner core device in the present invention ensures that the lubricating fluid can be distributed evenly and continuously on the surface of the inner core, particularly at the end furthest from the lubrication source. By optimizing the distribution and size of the lubricating fluid holes, the lubricating effect between the inner core and the inner wall of the stainless steel tube is significantly improved to reduce friction and wear during processing, thereby improving the accuracy and surface quality of the stainless steel tube during cold rolling. 2. In the present invention, the drive motor alters the receiving cavities between the individual movable partitions by eccentrically rotating the movable shaft assembly, thus enabling pressure injection of oil. Lubricating fluid holes, whose diameter gradually increases on the surface of the inner mold core, ensure uniform lubrication. This avoids the defect problem of insufficient lubrication flow from the lubrication holes on the surface of the inner mold core at the distal end, thereby improving lubrication uniformity on the surface of the inner mold core. 3. In the present invention, the eccentric rotation of the movable shaft assembly is driven by the drive motor to achieve automatic pressurization and injection of the lubricating fluid without additional manual intervention, thereby significantly improving production efficiency. This system allows the supply of lubricating fluid to be automatically adjusted according to the actual processing requirements, ensuring the continuity and consistency of the lubrication effect throughout the processing. This fulfills the requirements of large-scale cold rolling of stainless steel tubes, improving the level of automation and the overall efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 is a schematic representation of the overall structure according to an embodiment of the present invention; Fig. Figure 2 is a schematic representation of the structure of a self-lubricating arrangement according to an embodiment of the present invention; Fig. Figure 3 is a schematic representation of the cross-sectional structure of an inner mold core according to an embodiment of the present invention; Fig. Figure 4 is a schematic representation of the sectional structure of a pump box according to an embodiment of the present invention; Fig. Figure 5 is a schematic representation of the internal structure of a pump box according to an embodiment of the present invention; Fig. Figure 6 is a schematic representation of the disassembled structure of a movable shaft group according to an embodiment of the present invention; Fig. Figure 7 is a schematic representation of the structure of a movable partition according to an embodiment of the present invention; Fig. Figure 8 is a schematic representation of the disassembled structure of a diverting valve group according to an embodiment of the present invention. Reference symbol:

[0016] 100. Inner mold core; 110. Lubricating fluid hole; 200. Self-lubricating assembly; 210. Pump housing; 220. Fluid reservoir tank; 230. Diverter valve assembly; 240. Movable shaft assembly; 250. Movable partition; 211. Guide cap; 212. Fluid guide cavity; 213. One-way valve body; 214. Return slot; 231. Partial guide hole; 232. Rotary shaft valve; 233. Valve groove; 241. Main shaft; 242. Eccentric wheel; 243. Stop wheel; 251. Pivot pin; 252. Clockwork spring; 300. Drive motor. DETAILED DESCRIPTION

[0017] To clarify the purpose, technical solutions, and advantages of the present invention, it will be explained in more detail below in conjunction with the specific embodiments and with reference to the drawings. It should be noted that the embodiments of the present invention and the features in those embodiments can be combined without conflict.

[0018] It is understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0019] A self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to some embodiments of the present invention is described below in conjunction with the drawings.

[0020] A self-lubricating and forming inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to the present invention, comprising an inner forming core 100 and a self-lubricating arrangement 200 attached to one end of the inner forming core 100, wherein a flow channel is arranged on the inside of the inner forming core 100 and several lubricating fluid holes 110 are arranged on the surface of the inner forming core 100, wherein several lubricating fluid holes 110 increase stepwise along the inner diameter of one end away from the self-lubricating arrangement 200, wherein the self-lubricating arrangement 200 comprises a pump housing 210, a fluid storage tank 220, a diverting valve assembly 230 and a movable shaft assembly 240 as well as several movable partitions 250 on the inside of the pump housing 210, wherein one side of the pump housing 210 is fixedly connected to a guide cap 211.wherein the movable shaft assembly 240 is rotatably installed on the inside of the pump housing 210 and one end is fixedly connected to a rotary shaft valve 232, which is rotatably installed on the inside of the diverting valve assembly 230, wherein several partial guide holes 231 are arranged on the surface of the diverting valve assembly (230), which extend through the guide cap 211 and are uniformly distributed circumferentially, wherein the movable partitions 250 are uniformly distributed circumferentially on the inside of the pump housing 210, wherein one end of the partial guide holes 231 corresponds to and is connected with a gap between adjacent movable partitions 250, wherein a liquid storage tank 220 is fixedly installed on one side of the pump housing 210, and wherein a drive motor 300 for driving the rotation of the movable shaft assembly 240 is fixedly installed on the other side of the liquid storage tank 220.wherein a liquid guide cavity 212 is arranged on the inside of the pump housing 210, wherein one end of the liquid guide cavity 212 is connected to the inner cavity of the liquid storage tank 220, wherein a one-way valve body 213 is arranged on one side of the liquid guide cavity 212, which is associated with and connected to a gap between adjacent movable partitions 250, wherein a return slot 214 is arranged on the inside of the pump housing 210 for guiding the movement of the movable partition 250, wherein a pivot pin 251, which is rotatably installed on the inside of the pump housing 210, is arranged on one side of the movable partition 250, wherein one end of the pivot pin 251 is provided with a clockwork spring 252, wherein the clockwork spring 252 is used,to maintain the movable partition 250 in elastic contact with the surface of the movable shaft group 240, wherein the movable shaft group 240 is used for eccentric rotation and to press the movement of the movable partition 250 onto the inside of the return slot 214, wherein a valve groove 233 is arranged on the surface of the rotary shaft valve 232, in combination with , Fig. 1 to Fig. 8 shown.

[0021] In the present embodiment, the movable shaft assembly 240 comprises a main shaft 241, an eccentric wheel 242 and a stop wheel 243, wherein the eccentric wheel 242 is attached to the surface of the main shaft 241 and is encased on the inside of the stop wheel 243, wherein the upper and lower sides of the stop wheel 243 and the upper and lower sides of the movable partition 250 slide against the inner cavity of the pump housing 210 and one side of the guide cap 211 and are thereby sealed.

[0022] In the present embodiment, the stop wheel 243 is designed in an annular shape, with the center of the circle of the stop wheel 243 being offset from the axis of the main shaft 241.

[0023] In particular, under the drive of the drive motor 300, the stop wheel 243 is moved eccentrically by the rotation of the main shaft 241, in order to retract into the interior of the reset slot 214 by means of a counteracting deflection movement of the movable partition 250. Under the action of the clockwork spring 252, the movable partition 250 can be moved out again to effect the reciprocating movement of the movable partition 250.

[0024] In the present embodiment, the movable partition 250 and the return slot 214 are each arc-shaped and the center of the circle is arranged coaxially with the pivot pin 251, with the clockwork spring 252 being attached to the inside of the liquid storage tank 220 in order to drive the clockwork spring 252 and the movable partition 250 to rotate, so that one side of the movable partition 250 is always sliding against the surface of the stop wheel 243.

[0025] In particular, under the action of the sliding stop between the adjacent movable partitions 250 and the surface of the stop wheel 243, independent receiving cavities are formed between the adjacent movable partitions 250. This receiving cavity is used to introduce the lubricating solution into the interior of the fluid storage tank 220 through the fluid guide cavity 212 and the one-way valve body 213, and to discharge it through the connection with the partial guide holes 231. The change in the receiving cavities between the individual movable partitions 250 is achieved by the eccentric rotation of the movable shaft assembly 240 to implement pressure injection of oil.

[0026] In the present embodiment, the fluid guide cavity 212 and the one-way valve body 213 are used to guide the lubricating oil fluid within the fluid storage tank 220 in one direction into the receiving cavity between adjacent movable partition walls 250.

[0027] In the present embodiment, the rotary shaft valve 232 is conically shaped and slides against the inside of the deflection valve group 230 on its outer circumference to follow the rotation of the movable shaft group 240 and to close the end of the partial guide holes 231, wherein the surface of the rotary shaft valve 232 is notched to drain internal oil fluid from the partial guide holes 231, and wherein the width of the rotary shaft valve 232 is smaller than the width of the gap between adjacent partial guide holes 231.

[0028] In particular, as the movable shaft assembly 240 rotates, the receiving cavity between the movable partitions 250 gradually becomes smaller, so that the solution inside the receiving cavity is pressurized by the rotary shaft valve 232 under the closing action of the partial guide holes 231. When the valve groove 233 rotates into the connection of the partial guide holes 231, the internal pressure is instantly relieved, so that this portion of the oil fluid is discharged by injection and pumped into the interior of the lubrication holes 110.

[0029] In the present embodiment, a connecting pipe for introducing lubricating fluid or grease is arranged on one side of the liquid storage tank 220, and a guide bore for connection with the inside of the stop wheel 243 is arranged on the surface of the pump box 210.

[0030] In particular, the lubricating fluid is stored in the fluid reservoir 220. The interior of the stop wheel 243 can be lubricated to lubricate the movement between the eccentric wheel 242 and the stop wheel 243. The pivot pin 251 and the clockwork spring 252 are located within the fluid reservoir 220, so that lubrication by the stored lubricating fluid is also possible, thus improving the service life of the device.

[0031] In the present embodiment, the inner mold core 100 is a cast iron tubular structure, wherein the number of lubricant holes 110 is multiple and uniformly divided into multiple groups, each group of lubricant holes 110 being uniformly distributed in a circumferential direction on the surface of the inner mold core 100, the distance between each group of lubricant holes 110 decreasing stepwise in a direction away from the self-lubricating arrangement 200.

[0032] In particular, the lubrication holes 110 on the surface of the inner mold core 100 are more densely distributed at one end away from the self-lubricating arrangement 200 and have a larger inner diameter, so that the lubricating oil fluid is effectively directed onto the surface of the inner mold core 100 that is at one end away from the self-lubricating arrangement 200, thereby ensuring the uniformity of the distribution of the lubricating fluid on the surface of the inner mold core 100.

[0033] The operating principle and application process of the present invention: The inner forming core 100 is inserted into the interior of the stainless steel tube as a forming inner core structure during the cold rolling process of stainless steel tubes. Several lubrication holes 110 are arranged on the surface of the inner forming core 100. These holes increase in number along the inner diameter at one end furthest from the self-lubricating arrangement 200 to distribute the lubrication fluid evenly.

[0034] The self-lubricating assembly 200 comprises a pump housing 210, a fluid storage tank 220, a diverter valve assembly 230, a movable shaft assembly 240, and the like. After the drive motor 300 is started, the movable shaft assembly 240 begins to rotate. The eccentric wheel 242 is driven by the movable shaft assembly 240 via the main shaft 241, causing the eccentric wheel 242 to rotate eccentrically about the axis. During the rotation of the eccentric wheel 242, the movable partition 250 is pressed by the eccentric wheel 242 over the stop wheel 243, causing the movable partition 250 to move back and forth in the return slot 214 on the inside of the pump housing 210.

[0035] When the movable partition 250 moves towards the inside of the reset slot 214, the volume of the cavity increases to create a vacuum. The lubricating fluid in the fluid storage tank 220 is drawn into the cavity via the fluid guide cavity 212 and the one-way valve body 213.

[0036] When the movable partition 250 is moved outwards under the elastic action of the clockwork spring 252, the volume of the cavity is reduced. The lubricating fluid is pressurized and discharged through the partial guide holes 231 of the diverter valve assembly 230.

[0037] The opening and closing of the partial guide holes 231 is controlled by the rotary shaft valve 232 in the diverter valve assembly 230. When the rotary shaft valve 232 is rotated to the end of the partial guide holes 231, the lubricating fluid in the partial guide holes 231 is discharged under pressure through the valve groove 233. This lubricating fluid is sprayed into the interior of the inner mold core 100 and evenly distributed across its surface through the lubricating fluid holes 110 to lubricate the inner wall of the stainless steel tube. The distribution of the lubricating fluid holes 110 is designed such that the spacing decreases gradually along the end furthest from the self-lubricating arrangement 200, and the hole diameter gradually increases. This design ensures that the lubricating fluid can be discharged in a more concentrated manner in the areas furthest from the lubrication source.This ensures the uniformity of the lubricating fluid on the surface of the inner die 100, thereby improving the lubrication effect during the cold rolling of stainless steel tubes. Throughout the entire cold rolling process, the inner die 100 remains in contact with the inner wall of the stainless steel tube. The lubricating fluid provided by the self-lubricating assembly 200 reduces friction and wear, thus improving processing accuracy and product quality.

[0038] In this description, the terms "one embodiment," "some embodiments," "specific embodiment," etc., mean that specific features, structures, materials, or properties described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this description, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. The described specific features, structures, materials, or properties may be combined appropriately in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, the person skilled in the art can understand that various variations, modifications, substitutions, and variants can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

[1] Self-lubricating and shaping inner core device suitable for cold rolling of stainless steel tubes using hydrogen energy, comprising an inner forming core (100) and a self-lubricating arrangement (200) attached to one end of the inner forming core (100), characterized by, that a flow channel is arranged on the inside of the inner mold core (100) and several lubricating fluid holes (110) are arranged on the surface of the inner mold core (100), wherein several lubricating fluid holes (110) increase stepwise along the inner diameter of one end away from the self-lubricating arrangement (200), the self-lubricating arrangement (200) comprising a pump box (210), a fluid storage tank (220), a diverting valve assembly (230) and a movable shaft assembly (240) as well as several movable partitions (250) on the inside of the pump box (210), one side of the pump box (210) being fixedly connected to a guide cap (211), the movable shaft assembly (240) being rotatably installed on the inside of the pump box (210) and one end being fixedly connected to a rotary shaft valve (232) which is rotatably installed on the inside of the diverting valve assembly (230),wherein several partial guide holes (231) are arranged on the surface of the diverter valve assembly (230), which extend through the guide cap (211) and are uniformly distributed circumferentially, wherein the movable partitions (250) are uniformly distributed circumferentially on the inside of the pump housing (210), wherein one end of the partial guide holes (231) is assigned to and communicates with a gap between adjacent movable partitions (250), wherein a liquid storage tank (220) is fixedly installed on one side of the pump housing (210), wherein a drive motor (300) for driving the rotation of the movable shaft assembly (240) is fixedly installed on the other side of the liquid storage tank (220), and wherein a liquid guide cavity (212) is arranged on the inside of the pump housing (210).wherein one end of the liquid guide cavity (212) is connected to the inner cavity of the liquid storage tank (220), wherein a one-way valve body (213) is arranged on one side of the liquid guide cavity (212), which is associated with and connected to a gap between adjacent movable partitions (250), wherein a return slot (214) is arranged on the inside of the pump housing (210) for guiding the movement of the movable partition (250), wherein a pivot pin (251), which is rotatably installed on the inside of the pump housing (210), is arranged on one side of the movable partition (250), wherein one end of the pivot pin (251) is provided with a clockwork spring (252), wherein the clockwork spring (252) is used to maintain the movable partition (250) in elastic contact with the surface of the movable shaft assembly (240),wherein the movable shaft group (240) is used for eccentric rotation and for pressing the movement of the movable partition (250) onto the inside of the return slot (214), wherein a valve groove (233) is arranged on the surface of the rotary shaft valve (232). [2] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by , that the movable shaft assembly (240) comprises a main shaft (241), an eccentric wheel (242) and a stop wheel (243), wherein the eccentric wheel (242) is attached to the surface of the main shaft (241) and is encased on the inside of the stop wheel (243), wherein the upper and lower sides of the stop wheel (243) and the upper and lower sides of the movable partition (250) slide against the inner cavity of the pump housing (210) and one side of the guide cap (211) and are thereby sealed. [3] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 2, characterized by , that the stop wheel (243) is designed in a ring shape, wherein the center of the circle of the stop wheel (243) is offset from the axis of the main shaft (241). [4] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 2, characterized by , that the movable partition (250) and the return slot (214) are each arc-shaped and the center of the circle is arranged coaxially with the pivot pin (251), wherein the clockwork spring (252) is attached to the inside of the liquid storage tank (220) to drive the clockwork spring (252) and the movable partition (250) to rotate, so that one side of the movable partition (250) is always sliding against the surface of the stop wheel (243). [5] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by , that the fluid guide cavity (212) and the one-way valve body (213) are used to guide the lubricating oil fluid within the fluid storage tank (220) in one direction into the receiving cavity between each adjacent movable partitions (250). [6] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by, that the rotary shaft valve (232) is conically shaped and slides on its outer circumference against the inside of the deflection valve group (230) to follow the rotation of the movable shaft group (240) and to close the end of the partial guide holes (231), wherein the surface of the rotary shaft valve (232) is notched to drain internal oil fluid from the partial guide holes (231), wherein the width of the rotary shaft valve (232) is smaller than the width of the gap between adjacent partial guide holes (231). [7] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by, that a connecting pipe for introducing lubricating fluid or grease is arranged on one side of the liquid storage tank (220), wherein a guide bore for connection with the inside of the stop wheel (243) is arranged on the surface of the pump box (210). [8] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by , that the inner mold core (100) is a tubular body structure made of cast iron. [9] Self-lubricating and shape-giving inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy according to claim 1, characterized by, that the number of lubricant holes (110) is several and are evenly divided into several groups, each group of lubricant holes (110) being evenly distributed in a circumferential direction on the surface of the inner mold core (100), the distance between each group of lubricant holes (110) decreasing stepwise in a direction away from the self-lubricating arrangement (200).

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