A core cooling structure for a steel pipe drawing device
By setting cooling water channels and a circulating water system on the core column, combined with the design of alternating work driven by planetary roller screws, the problem of thermal expansion and contraction of the core column is solved, and precise control of the inner diameter of the steel pipe is achieved.
Patent Information
- Application Number
- CN202423283675.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
During the stretching process of the steel pipe, the mandrel generates a large amount of heat due to compression and friction, causing it to expand and contract with temperature changes, which affects the accuracy of the inner diameter of the steel pipe.
Cooling water channels are set on the core column, and a circulating water system is formed through the inlet and outlet water pipes to cool the end of the core column. Combined with the planetary roller screw driving the core column to move back and forth, the front and rear extrusion sections work alternately to achieve cooling.
Effectively controlling the core column temperature within a reasonable range ensures the accuracy and stability of the steel pipe's inner diameter dimensions, preventing dimensional discrepancies caused by thermal expansion and contraction.
Smart Images
Figure CN223588027U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of steel pipe cleaning, specifically relates to a core column cooling structure for steel pipe drawing device. BACKGROUND
[0002] Steel pipes are widely used in modern engineering, especially in the fields of construction, petroleum, chemical industry and municipal infrastructure. Because of their good strength, toughness and corrosion resistance, they are often used to carry heavy loads and transport fluids.
[0003] For some special steel pipes, before use, steel pipe drawing is needed to stretch the originally large-diameter steel pipe into a small-diameter steel pipe, while increasing the length of the steel pipe and reducing the thickness of the steel pipe. In order to achieve this purpose, a steel pipe cold drawing machine is needed, which is a device that can extrude the steel pipe. At the same time, a core column is needed, which is inserted into the inner cavity of the steel pipe. The steel pipe cold drawing machine and the core column are one inside and one outside, extruding the steel pipe to make the thickness of the steel pipe thinner and the length longer. In this process, the core column will generate a lot of heat due to extrusion and friction, which will cause the core column to deform due to thermal expansion and contraction, and then cause the inner diameter of the extruded steel pipe to not meet the requirements.
[0004] Therefore, the core column structure needs to be improved to dissipate heat in time. CONTENT OF THE UTILITY MODEL
[0005] The utility model is based on the technical problems mentioned in the background art, and proposes a core column cooling structure for steel pipe drawing device.
[0006] The utility model adopts the following technical scheme:
[0007] A core column cooling structure for steel pipe drawing device, comprising a fixed installation table, a core column is installed on the fixed installation table, the rear end of the core column is positioned and installed on the fixed installation table, the inner cavity of the steel pipe is sleeved on the core column, the front end of the steel pipe and the core column can be inserted into the steel pipe cold drawing machine together, the steel pipe cold drawing machine is used for extruding the steel pipe towards the axial direction of the steel pipe from the outside, the core column is divided into a core column end and a core column rod part, the core column end is detachably installed at the front end of the core column rod part, a cooling water flow channel is arranged in the core column end, a water inlet pipe and a water outlet pipe are arranged in the core column rod part, the two ends of the cooling water flow channel are connected with the front ends of the water inlet pipe and the water outlet pipe respectively, the rear ends of the water inlet pipe and the water outlet pipe are located at the rear part of the core column rod part, the rear end of the water inlet pipe is connected with a water pump, the water pump is connected with a water source, and the water outlet pipe is connected to the outside of the core column rod part.
[0008] To optimize the technical scheme, further measures are taken as follows:
[0009] The front end of the stem rod is provided with a stem rod front thread joint, and the rear end of the stem end is provided with a stem end joint thread.
[0010] The rear end of the stem end is provided with two cooling water channel joints, the cooling water channel joints are respectively communicated with two ends of the cooling water channel, and the water inlet pipe and the water outlet pipe are respectively jointed to the two cooling water channel joints.
[0011] The first bearing seat and the second bearing seat are arranged at the front and rear of the fixed mounting table, the stem passes through the first bearing seat and the second bearing seat, and the stem can slide relative to the first bearing seat and the second bearing seat.
[0012] The rear end of the stem rod is provided with a water inlet pipe joint and a water outlet pipe joint, the water inlet pipe joint and the water outlet pipe joint are respectively jointed to the rear end of the water inlet pipe and the rear end of the water outlet pipe, the water inlet pipe joint is connected with the water outlet end of the water pump through a pipeline, the water inlet end of the water pump is connected with a water pool, and the water outlet pipe joint is connected with the water pool through a pipeline.
[0013] The steel pipe cold drawing machine can extrude the inner cavity of the steel pipe to be attached to the stem end, the front and rear lengths of the structure of the extruded steel pipe are defined as the force applying section length, the length of the stem end is twice the force applying section length, the front extruded section length of the stem end is defined as the front stem extruded section, the rear extruded section length of the stem end is defined as the rear stem extruded section, the rear end of the stem is provided with a driving unit, the driving unit can drive the stem to move forward and backward, and the front stem extruded section and the rear stem extruded section are alternately aligned with the force applying section.
[0014] The driving unit is a planetary roller screw.
[0015] The rear end of the steel pipe is positioned and mounted on the sliding table, the sliding table is slidingly mounted on the fixed mounting table, and the sliding table is located in front of the first bearing seat and the second bearing seat.
[0016] The water pool is a brick pool body placed behind the fixed mounting table.
[0017] The water pump and the motor in the planetary roller screw are connected with the commercial power.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The cooling water channel is arranged on the stem end of the stem, the cooling water channel is connected with the water inlet pipe and the water outlet pipe, the circulating water flow of the water inlet pipe and the water outlet pipe can effectively cool the stem end, and the stem end is ensured to be in a reasonable temperature range.
[0020] The utility model discloses the core column end and core column rod parting assembly, because the core column length is above 30 meters, and the rear end of the water inlet pipe and the water outlet pipe can only be arranged at the rear end of the core column because of the reason that the steel pipe is to be sleeved on the core column, which leads to the difficulty in operation when the front end of the water inlet pipe and the water outlet pipe is connected with the cooling water flow channel, the utility model discloses the core column end and core column rod parting, can the front end of water inlet pipe and water outlet pipe is passed through the core column rod part, then under the split state of the core column end and the core column rod part, with cooling water flow channel butt joint, easy to install.
[0021] The utility model further prolongs the core column extruding section of the core column end, and installs the driving unit at the rear end of the core column, and the driving unit can make the front core column extruding section and the rear core column extruding section alternately align with the force applying section. After the front core column extruding section aligns with the force applying section for a period of time, the temperature of the front core column extruding section rises, the driving unit replaces the rear core column extruding section and aligns with the force applying section, so that the front core column extruding section exits the work, and has a long time for cooling. Through the design of the front and rear core column extruding sections, the working temperature of the core column can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is the structural schematic diagram of the utility model;
[0023] Figure 2 It is Figure 1 The A part structure enlarged view of;
[0024] Figure 3 It is Figure 1 The B part structure enlarged view of;
[0025] The drawing sign is: fixed installation platform 1, core column 2, core column end 21, cooling water flow channel 21a, cooling water flow channel butt joint 21b, core column rod part 22, water inlet pipe 22a, water outlet pipe 22b, water inlet pipe butt joint 22c, water outlet pipe butt joint 22d, steel pipe 3, water pump 4, first bearing seat 5, second bearing seat 6, water pool 7, sliding table 8, planetary roller screw 9. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantage of the application more clear, the application is described and explained below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the application and not to limit the application. Based on the examples provided in the application, all other examples obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.
[0027] It is apparent that the accompanying drawings described below in the description merely show some examples or embodiments of the present application, and the present application can be applied to other similar situations without creative labor by those skilled in the art according to the drawings. In addition, it can be understood that although the efforts made in the development process can be complex and lengthy, some modifications, such as design, manufacture or production, etc. based on the technical content disclosed in the present application, are only routine technical means for those skilled in the art related to the content disclosed in the present application, and should not be understood as insufficient disclosure of the content disclosed in the present application.
[0028] Reference to "an embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is explicitly contemplated that embodiments described herein can be combined with each other, if such embodiments do not conflict.
[0029] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning understood by those skilled in the art to which the present application pertains. The terms "a", "an", "one", "the", and similar terms in the present application do not denote a quantity of one, but rather denote the presence of at least one of the referenced item. The terms "include", "comprise", "have", and any variations thereof in the present application are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or device that includes a list of steps or units (units) is not limited to the listed steps or units, but can also include other steps or units not listed or can also include other steps or units inherent to such processes, methods, products, or devices. The terms "connect", "connected", "coupled", and similar terms in the present application are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "multiple" / "several" refer to two or more. The term "and / or" describes the association relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The terms "first", "second", "third", and the like in the present application are merely to distinguish similar objects, and do not represent a specific order for the objects.
[0030] As Figure 1As shown, the steel pipe stretching device with the core column cooling structure, the main structure includes fixed installation platform 1, core column 2, steel pipe 3, water pump 4, first bearing seat 5, second bearing seat 6, water tank 7 and sliding table 8, planetary roller screw 9 and other main structures.
[0031] Among them, the steel pipe cold drawing machine used by the utility model is prior art, and the specific structure is not within the protection scope of the utility model.
[0032] The fixed installation platform 1 is a long platform with a length of about 15 meters, and the planetary roller screw 9, the first bearing seat 5, the second bearing seat 6 and the sliding table 8 are sequentially installed from back to front.
[0033] The core column 2 is a cylindrical column with a length of 30-40 meters, the rear end of the core column 2 is connected with the planetary roller screw 9, the core column 2 simultaneously passes through the first bearing seat 5 and the second bearing seat 6, the core column 2 can slide back and forth in the first bearing seat 5 and the second bearing seat 6, the first bearing seat 5 and the second bearing seat 6 lift the core column 2 by a height, facilitating the installation of the steel pipe 3, and the first bearing seat 5 and the second bearing seat 6 also play a role of positioning the core column 2.
[0034] The inner cavity of the steel pipe 3 is sleeved on the core column 2, the front end of the steel pipe 3 and the core column 2 can be inserted into the steel pipe cold drawing machine together, the rear end of the steel pipe 3 is connected with the sliding table 8, the sliding table 8 is connected with a step motor, the step motor can drive the sliding table 8 to move forward by a predetermined step, the sliding table 8 moves forward with the steel pipe 3, the steel pipe 3 and the core column 2 belong to sliding fit, and the movement of the steel pipe 3 will not drive the core column 2 to move.
[0035] As shown in the figure, Figure 2 The core column 2 includes a core column end head 21 and a core column rod part 22, the core column end head 21 is located at the front end of the core column rod part 22, and has a length of about 50 cm, the core column end head 21 is detachable, a U-shaped cooling water flow channel 21a is arranged in the core column end head 21, a water inlet pipe 22a and a water outlet pipe 22b are arranged in the core column rod part 22, two cooling water flow channel butt joints 21b are arranged at the two ends of the cooling water flow channel 21a respectively, and the cooling water flow channel 21a is connected with the front ends of the water inlet pipe 22a and the water outlet pipe 22b through the cooling water flow channel butt joints 21b.
[0036] As shown in the figure, Figure 3 The rear end of the core column rod part 22 is provided with a water inlet pipe butt joint 22c and a water outlet pipe butt joint 22d, the water inlet pipe butt joint 22c and the water outlet pipe butt joint 22d are respectively butt-jointed with the rear ends of the water inlet pipe 22a and the water outlet pipe 22b, the water inlet pipe butt joint 22c is connected with the water outlet end of the water pump 4 through a pipeline, the water inlet end of the water pump 4 is connected with a water tank 7, and the water outlet pipe butt joint 22d is connected with the water tank 7 through a pipeline.
[0037] The utility model discloses a circulating water system which is composed of the pool 7, water pump 4, inlet pipe 22a, cooling water channel 21a and outlet pipe 22b, and the circulating water system can effectively cool the core column end 21 and prevent the temperature of the core column end 21 from being too high.
[0038] In addition, the length of the core column end 21 is improved, the length of the core column end 21 is twice the length of the force applying section of the steel pipe cold drawing machine, the planetary roller screw 9 can drive the core column 2 to move forward and backward, so that the front core column extrusion section and the rear core column extrusion section are alternately aligned with the force applying section. After the front core column extrusion section is aligned with the force applying section and works for a period of time, the temperature of the front core column extrusion section rises, the planetary roller screw 9 drives the core column 2 to move forward, so that the rear core column extrusion section is aligned with the force applying section, thereby making the front core column extrusion section stop working and having a longer time for cooling. After the rear core column extrusion section works for a period of time, the planetary roller screw 9 drives the core column 2 to move backward. Therefore, the front and rear core column extrusion sections are alternately cooled, and the working temperature of the core column is effectively reduced.
[0039] The above is only the preferred implementation manner of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the utility model belongs to the protection scope of the utility model. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model are regarded as the protection scope of the utility model.
Claims
1. A core rod cooling structure for a steel pipe drawing device, comprising a fixed mounting table (1) on which a core rod (2) is mounted, the rear end of the core rod (2) being positioned and mounted on the fixed mounting table (1), the inner cavity of a steel pipe (3) being sleeved on the core rod (2), the front ends of the steel pipe (3) and the core rod (2) being capable of being extended into a steel pipe cold drawing machine together, the steel pipe cold drawing machine being used for extruding the steel pipe (3) towards the axial direction of the steel pipe (3) from the outside, characterized in that: The core column (2) is divided into a core column end head (21) and a core column rod (22), the core column end head (21) is detachably mounted at the front end of the core column rod (22), the core column end head (21) is provided with a cooling water channel (21a) inside, the core column rod (22) is provided with a water inlet pipe (22a) and a water outlet pipe (22b) inside, the two ends of the cooling water channel (21a) are connected with the front ends of the water inlet pipe (22a) and the water outlet pipe (22b) respectively, the rear ends of the water inlet pipe (22a) and the water outlet pipe (22b) are located at the rear part of the core column rod (22), the rear end of the water inlet pipe (22a) is connected with a water pump (4), the water pump (4) is connected with a water source, and the water outlet pipe (22b) is connected to the outside of the core column rod (22). 2. A core cooling structure for a pipe stretching apparatus according to claim 1, characterized by: The front end of the core column rod (22) is provided with a core column rod front thread butt joint, the rear end of the core column end head (21) is provided with a core column end head butt thread, the core column end head (21) is butt jointed to the core column rod front thread butt joint through the core column end head butt thread, and the connection with the core column rod (22) is realized.
3. A core cooling structure for a pipe stretching apparatus according to claim 2, characterized in that: The cooling water channel (21a) is a U-shaped channel, the rear end of the core column end head (21) is provided with two cooling water channel butt joints (21b), the cooling water channel butt joints (21b) are respectively communicated with the two ends of the cooling water channel (21a), and the water inlet pipe (22a) and the water outlet pipe (22b) are respectively butt jointed to the two cooling water channel butt joints (21b).
4. A core cooling structure for a pipe stretching apparatus according to claim 3, characterized in that: The first bearing seat (5) and the second bearing seat (6) are mounted on the fixed mounting table (1), the first bearing seat (5) and the second bearing seat (6) are arranged at intervals front and back, the core column (2) passes through the first bearing seat (5) and the second bearing seat (6) at the same time and the core column (2) can slide front and back relative to the first bearing seat (5) and the second bearing seat (6), and the first bearing seat (5) and the second bearing seat (6) are used for supporting the core column (2).
5. A core cooling structure for a pipe stretching apparatus according to claim 4, characterized in that: The rear end of the core column rod (22) is provided with a water inlet pipe butt joint (22c) and a water outlet pipe butt joint (22d), the water inlet pipe butt joint (22c) and the water outlet pipe butt joint (22d) are respectively butt jointed with the rear ends of the water inlet pipe (22a) and the water outlet pipe (22b), the water inlet pipe butt joint (22c) is connected with the water outlet end of the water pump (4) through a pipeline, the water inlet end of the water pump (4) is connected with a water pool (7), and the water outlet pipe butt joint (22d) is connected with the water pool (7) through a pipeline.
6. A core cooling structure for a pipe stretching apparatus according to claim 5, characterized by: The steel pipe cold drawing machine can extrude the inner cavity of the steel pipe (3) to be attached to the core column end head (21), the front and back lengths of the structure of the extruded steel pipe (3) are defined as the force applying section length when the steel pipe cold drawing machine extrudes the steel pipe (3), the length of the core column end head (21) is twice the length of the force applying section, the front extrusion section length of the core column end head (21) is defined as the front core column extrusion section, the rear extrusion section length is defined as the rear core column extrusion section, the rear end of the core column (2) is provided with a driving unit, the driving unit can drive the core column (2) to move front and back, and the front core column extrusion section and the rear core column extrusion section are alternately aligned with the force applying section.
7. A core cooling structure for a pipe stretching apparatus according to claim 6, characterized in that: The driving unit is a planetary roller screw (9).
8. A core cooling structure for a pipe stretching apparatus according to claim 7, characterized by: The rear end of the steel pipe (3) is positioned and installed on a sliding table (8), the sliding table (8) is slidingly installed on a fixed installation table (1), and the sliding table (8) is located in front of the first bearing seat (5) and the second bearing seat (6).
9. A core cooling structure for a pipe stretching apparatus according to claim 5, characterized by: The pool (7) is a brick pool body placed behind the fixed installation table (1).
10. The core cooling structure for a pipe stretching apparatus according to claim 7, characterized by: The water pump (4) and the motor in the planetary roller screw are connected with the commercial power.