A steel pipe degreasing system

Abstract

The present invention discloses a steel pipe degreasing system, which is characterized by comprising a multifunctional swing arm unit, an internal degreasing positioning unit and a gas-liquid composite purging unit; wherein the multifunctional swing arm unit performs swinging and tilting movements on a plurality of steel pipes placed together; the internal degreasing positioning unit positions the steel pipes placed together; and the gas-liquid composite purging unit cleans and purges the steel pipes with degreasing liquid. The purpose of the present invention is to reduce the floor space occupied by the equipment, reduce the difficulty of manufacturing and maintaining the equipment, improve the productivity of product degreasing, and thus reduce the overall cost of the equipment. The multifunctional swing arm unit adopts four groups of swing arm units with the same configuration, and implements different combinations of movement time, position and distance, so as to realize the four functions required for steel pipe degreasing, namely, material loading and unloading, pipe body vibration, exhaust inside the pipe and drainage, in one workstation, shortening the process route, reducing the number of equipment, and improving the stability of manufacturing and control.

Description

Technical field:

[0001] The present invention relates to the technical field of a steel pipe production line, and in particular to a cleaning system for degreasing a steel pipe. Background technology:

[0002] After cold rolling, steel pipes require cleaning of grease from both the inner and outer surfaces. This process is performed with an alkaline degreasing solution to ensure the pipe meets customer delivery requirements. Typically, degreasing machines in production lines utilize a single station to degrease a single pipe. Each station is equipped with a nozzle for internal degreasing, cleaning, and purging. The pipe rotates within the station, while a spray pipe located above degreases and cleans the outer surface.

[0003] During steel pipe degreasing, individual pipes are conveyed to a set of rotating tugboats. Nozzles inserted at their fixed ends treat the inner surface with degreasing liquid, clean water, and air, respectively. Nozzles above the pipes sequentially spray degreasing liquid and clean water onto the outer surface. The working distance between pipes must accommodate equipment limitations, prohibiting close spacing. The degreasing process is lengthy, requiring a large number of pipes to be processed simultaneously. This results in a long equipment layout and a large footprint. The parallel processing of multiple pipes necessitates complex conveying equipment, which also takes up considerable space. The degreasing equipment and conveying equipment operate in two directions, with external surface degreasing nozzles located above, complicating installation and maintenance. During external surface degreasing, the degreasing liquid and clean water are both in an open space. The optimal degreasing temperature is approximately 60°C, which creates vapor in the open space and affects surrounding equipment.

[0004] This patent was invented in order to reduce the space occupied by degreasing equipment, improve production capacity, reduce the impact of steam on surrounding equipment, and facilitate equipment maintenance. Summary of the invention:

[0005] In order to solve the above problems, the degreasing machine of the present invention degreases, cleans and purges the inner and outer surfaces of the steel pipe processed from the cold rolling mill. According to the product specifications and surface requirements, the degreasing machine achieves the best production effect by setting parameters such as the time for internal and external degreasing, the number of nozzles, and the shaking frequency of the steel pipe.

[0006] The present invention provides the following technical solution: a steel pipe degreasing system, characterized in that it includes a multifunctional swing arm unit, an internal degreasing positioning unit and a gas-liquid composite purging unit; wherein the multifunctional swing arm unit performs swinging and tilting movements on multiple steel pipes placed together; the internal degreasing positioning unit positions the integrated steel pipes; and the gas-liquid composite purging unit cleans and purges the steel pipes with degreasing liquid.

[0007] In one embodiment, the multifunctional swing arm unit includes a transmission component, a rocker arm, a first motor and an encoder; wherein, the first end of the rocker arm is connected to the synchronous shaft, the first end of the rocker arm is connected to the first placement slot, and a plurality of steel pipes are placed in the first placement slot along the length direction of the first placement slot. The rotation output of the first motor drives the synchronous shaft to rotate after being transmitted by the transmission component, and then drives the rocker arm to swing through the rotation of the synchronous shaft.

[0008] In one embodiment, the transmission component includes a first sprocket, a chain and a second sprocket; wherein the chain is a closed chain and meshes the first sprocket and the second sprocket, the first sprocket is connected to the output end of the first motor, and the second sprocket is sleeved on the outside of the synchronous shaft.

[0009] In one embodiment, the internal degreasing positioning unit includes a second placing groove, a bracket and an elastic particle bag; wherein, the bracket is installed in the second placing groove, and the front and rear parts of the steel pipe are placed on the bracket. When the steel pipe is transported into the cleaning area, the elastic particle bag presses the steel pipe downward from the top of the bracket and the steel pipe.

[0010] In one embodiment, a first group of cylinders is further included, wherein the output ends of the first group of cylinders are installed on the lower side of the bracket, and the height of the bracket is adjusted by the output of the first group of cylinders.

[0011] In one embodiment, the gas-liquid composite purging unit includes an air source, a water source, a nozzle, a pipeline, a gas control component and a liquid control component. The gas control component and the liquid control component control the opening of the air circuit and the liquid circuit in a time-sharing manner, and the gas and liquid are purged and cleaned by spraying through the nozzle, and the liquid is a degreasing liquid.

[0012] In one embodiment, a cleaning box is provided in the cleaning area, the nozzle is mounted on a composite card slot, and the composite card slot is mounted in the cleaning box.

[0013] In one embodiment, the output ends of the second group of cylinders are installed at the front or rear of both sides of the cleaning box, and the tilt angle of the cleaning box is controlled by the output of the second group of cylinders.

[0014] In one embodiment, the gas-liquid composite purge unit also includes a high-level distribution liquid tank, and the liquid is distributed to the nozzle after passing through the high-level distribution liquid tank. The gas control component and the liquid control component include several one-way valves and drain valves, and the pipeline also includes a U-shaped pipeline.

[0015] In one embodiment, the multifunctional swing arm units are divided into several groups and are evenly distributed along the axial direction of the steel pipe in the placement groove.

[0016] The main advantages or positive effects of the present invention compared with the prior art are: the purpose of the present invention is to reduce the space occupied by the equipment, reduce the difficulty of manufacturing and maintaining the equipment, and improve the productivity of product degreasing, thereby reducing the overall cost of the equipment.

[0017] The multifunctional swing arm unit adopts four groups of swing arm units with the same configuration, and implements different combinations of movement time, position and distance. It can realize the four functions required for steel pipe degreasing, namely material feeding and discharging, pipe body vibration, exhaust and drainage in the pipe at one workstation, shortening the process route, reducing the number of equipment and improving the stability of manufacturing and control.

[0018] The internal degreasing positioning unit uses a cylinder to press down the elastic body to fix the head of the steel pipe for internal degreasing, and fixes the corresponding nozzle through a composite slot; it solves the problem of the reaction force of the degreasing liquid flushing the steel pipe causing the steel pipe and the nozzle to separate, and solves the problem of fixing steel pipes of different specifications and quantities.

[0019] The gas-liquid composite purge system improves the uniformity of the degreasing liquid output of a single nozzle. The degreasing liquid can be discharged faster and enter the purge working condition, and the degreasing liquid that flows into the gas system during operation is discharged. Description of the drawings:

[0020] Figure 1 This is a schematic diagram of the overall appearance of a steel pipe degreasing system in one embodiment of the present invention;

[0021] Figure 2 This is an overall layout diagram of a multifunctional rocker unit in one embodiment of the present invention;

[0022] Figure 3 A partial layout diagram of a group of multifunctional rocker units in one embodiment of the present invention;

[0023] Figure 4 This is a layout diagram of the internal degreasing positioning unit and the gas-liquid composite purge unit in one embodiment of the present invention;

[0024] Figure 5 This is a system principle diagram of a gas-liquid composite purge unit in one embodiment of the present invention. Specific implementation method:

[0025] The following is an explanation of the embodiments of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0026] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0028] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0029] Please refer to Figure 1 and combined Figure 2-Figure 5 The present invention discloses a steel pipe degreasing system, comprising a multifunctional swing arm unit 1, an internal degreasing positioning unit 2 and a gas-liquid composite purging unit 3; wherein the multifunctional swing arm unit 1 performs swinging and tilting movements on a plurality of steel pipes placed together; the internal degreasing positioning unit 2 positions the steel pipes placed together; and the gas-liquid composite purging unit 3 cleans and purges the steel pipes with degreasing liquid.

[0030] Furthermore, the multifunctional swing arm unit 1 includes a transmission component 11, a rocker arm 12, a first motor 13 and an encoder 14; wherein, the first end of the rocker arm 12 is connected to the synchronous shaft 15, and the first end of the rocker arm is connected to the first placement slot 16. Several steel pipes are placed in the first placement slot 16 along the length direction of the first placement slot 16. The rotation output of the first motor 13 drives the synchronous shaft 15 to rotate after being transmitted by the transmission component 11, and then drives the rocker arm 12 to swing through the rotation of the synchronous shaft 15.

[0031] Furthermore, the transmission component 11 includes a first sprocket, a chain and a second sprocket (not marked in the figure); wherein the chain is a closed chain and meshes the first sprocket and the second sprocket, the first sprocket is connected to the output end of the first motor, and the second sprocket is sleeved on the outside of the synchronous shaft.

[0032] Furthermore, the internal degreasing positioning unit 2 includes a second placing groove 21, a bracket 22 and an elastic particle bag 23; wherein, the bracket 22 is installed in the second placing groove, and the front and rear parts of the steel pipe are placed on the bracket 22. When the steel pipe is transported into the cleaning area, the elastic particle bag 23 presses the steel pipe downward from the bracket 22 and the top of the steel pipe.

[0033] Furthermore, it also includes a first group of cylinders 24 , the output ends of the first group of cylinders 24 are installed on the lower side of the bracket 22 , and the height of the bracket 22 is adjusted by the output of the first group of cylinders 24 .

[0034] Furthermore, the gas-liquid composite purging unit 3 includes an air source, a water source, a nozzle, a pipeline, a gas control component and a liquid control component. The gas control component and the liquid control component control the opening of the gas circuit and the liquid circuit in a time-sharing manner, and the gas and liquid are purged and cleaned by spraying through the nozzle, and the liquid is a degreasing liquid.

[0035] Furthermore, a cleaning box 31 is provided in the cleaning area, the nozzle 32 is installed on a composite card slot 33 , and the composite card slot 33 is installed in the cleaning box 31 .

[0036] Furthermore, the output ends of the second group of cylinders 34 are installed at the front or rear of both sides of the cleaning box 31 , and the tilt angle of the cleaning box 31 is controlled by the output of the second group of cylinders 34 .

[0037] Furthermore, the gas-liquid composite purge unit 3 also includes a high-level distribution liquid tank, and the liquid is distributed to the nozzle after passing through the high-level distribution liquid tank. The gas control component and the liquid control component include several one-way valves and drain valves, and the pipeline also includes a U-shaped pipeline.

[0038] Furthermore, the multifunctional swing arm units are divided into several groups and are evenly distributed along the axial direction of the steel pipe in the placement groove.

[0039] It can be understood that the encoder is installed on the synchronization shaft to record the rotation angle of the synchronization shaft.

[0040] It is understandable that the specific working principle of the present invention is as follows:

[0041] The multifunctional swing arm unit can be arranged in four groups along the axis of the steel pipe. Each unit is identically configured, consisting of a cycloidal motor (with brake), sprocket, chain, shaft, swing arm, and encoder. During pipe loading and unloading, the four swing arm units start and stop synchronously at set positions to meet production needs. For vibratory degreasing, several groups of swing arms operate at set times, angles, and speeds, creating displacement between the pipes. This eliminates dead spots on the pipe surface where the degreasing liquid is trapped, improving degreasing efficiency. For in-pipe venting, as the pipe enters the liquid, the several groups of swing arms rotate at different angles according to a set ratio, tilting the pipe upwards, allowing air trapped in the pipe cavity to escape from the upper end. For internal drainage, as the pipe exits the trough, the several groups of swing arms rotate at different angles according to a set ratio, tilting the pipe upwards, allowing liquid to be discharged from the lowest end of the pipe, reducing the risk of excess liquid spilling onto the outside of the trough during feeding. The sprocket chain is driven by a variable frequency motor to drive the swing arm to rotate in both directions. Combined with the encoder's detection of the swing arm position, the feeding and discharging functions, vibration degreasing, exhaust in the pipe and drainage of the inner cavity during degreasing and cleaning of the outer circle of multiple steel pipes are realized.

[0042] Parallel internal degreasing positioning unit. When the degreasing liquid flows, it generates a reaction force on the nozzle and the steel pipe, so there is a tendency for it to move out of the working position during operation. The device uses a double cylinder to press down the elastic particle bag to fix the steel pipe, and a composite card slot to fix the inner nozzle, so as to achieve stable operation of the steel pipe and the nozzle during inner surface degreasing. When the elastic particle bag is pressed onto the steel pipe, it will automatically adapt to its shape according to the different quantities and specifications of the steel pipes, generating more uniform pressure and reducing the phenomenon of the steel pipe falling out. The number of steel pipes that are degreased at one time mainly depends on the outer diameter of the steel pipe, so the number of working nozzles will change during operation. The composite card slot fixes the corresponding nozzles, solving the problem of nozzle selection and fixation. Multiple steel pipes can be processed in a small space at one time. The cylinder presses down the elastic body to fix different numbers of steel pipes, and the composite card slot fixes the corresponding nozzles to achieve the degreasing and cleaning functions of the inner circle of the steel pipe.

[0043] The gas-liquid composite purge unit solves the problem of two-phase fluids flowing into each other's pipelines when there is mixing space in the gas-liquid pipeline, especially when liquid flows into the air pipeline and causes damage to pneumatic components. The U-shaped pipeline, one-way valve and drain valve are used to effectively isolate the gas-liquid two-phase pipeline, and collect and discharge the liquid that seeps into the gas line from the liquid system, improving the stability of the equipment and reducing the maintenance workload. A high-level distribution liquid tank is set to improve the uniformity of liquid flowing out of a single nozzle. In addition, when switching between gas and liquid, the liquid can be discharged from the liquid tank more quickly, reducing the speed of the two-phase switching. The high-level tank increases the uniformity of the liquid at each nozzle, and when switching between gas and liquid, the liquid can be discharged into the liquid system more quickly. The air-controlled one-way valve can stably control the purge gas. The U-shaped pipeline and drain valve collect and discharge the liquid that seeps into the gas line from the liquid system.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A steel pipe degreasing system, characterized by: It includes a multifunctional swing arm unit, an internal degreasing positioning unit and a gas-liquid composite purge unit; The multifunctional swing arm unit performs swing and tilt motion on multiple steel pipes placed together; The integrated steel pipes are positioned by the internal resin positioning unit; The steel pipe is cleaned and purged with degreasing liquid by the gas-liquid composite purging unit; The internal degreasing positioning unit includes a second placement tank, a bracket, and an elastic particle bag. The bracket is installed in the second placement tank, and the front and rear parts of the steel pipe are placed on the bracket. When the steel pipe is transported into the cleaning area, the elastic particle bag presses the steel pipe downward from the bracket and the upper part of the steel pipe. It also includes a first group of cylinders, the output ends of the first group of cylinders are installed on the lower side of the bracket, and the height of the bracket is adjusted by the output of the first group of cylinders; When steel pipes are fed in and out, several groups of swing arm units start and stop synchronously at set positions to meet production needs; during vibration degreasing, several groups of swing arm units operate at set time, angle, and speed respectively, causing displacement between steel pipes, eliminating dead corners of degreasing liquid on the surface of steel pipes, and improving degreasing effect; during pipe exhaust, when the steel pipe enters the liquid, several groups of swing arm units rotate at different angles according to set proportions, causing the steel pipe to present an upward inclination angle, facilitating the discharge of air in the pipe cavity from the high end; during inner cavity drainage, when the steel pipe is sent out of the trough, several groups of swing arm units rotate at different angles according to set proportions, causing the steel pipe to present an upward inclination angle, and the liquid is discharged from the lowest pipe end, reducing the amount of residual liquid in the pipe from spilling onto the outside of the trough during material transfer; The gas-liquid composite purging unit includes an air source, a water source, a nozzle, a pipeline, a gas control component and a liquid control component. The gas control component and the liquid control component control the opening of the gas circuit and the liquid circuit in a time-sharing manner, and the gas and liquid are purged and cleaned by spraying through the nozzle, and the liquid is a degreasing liquid.

2. A steel pipe degreasing system according to claim 1, characterized in that: The multifunctional swing arm unit includes a transmission component, a swing rod, a first motor and an encoder; wherein, The first end of the pendulum rod is connected to the synchronous shaft, and the first end of the pendulum rod is connected to the first placement slot. Several steel pipes are placed in the first placement slot along the length direction of the first placement slot. The rotation output of the first motor drives the synchronous shaft to rotate after being transmitted through the transmission component, and then the rotation of the synchronous shaft drives the pendulum rod to swing.

3. A steel pipe degreasing system according to claim 2, characterized in that: The transmission component includes a first sprocket, a chain and a second sprocket; wherein, The chain is a closed chain and meshes with a first sprocket and a second sprocket. The first sprocket is connected to the output end of the first motor, and the second sprocket is sleeved on the outside of the synchronous shaft.

4. A steel pipe degreasing system according to claim 1, characterized in that: A cleaning box is provided in the cleaning area, the nozzle is mounted on the composite card slot, and the composite card slot is mounted in the cleaning box.

5. A steel pipe degreasing system according to claim 4, characterized in that: The output ends of the second group of cylinders are installed at the front or rear of both sides of the cleaning box, and the tilt angle of the cleaning box is controlled by the output of the second group of cylinders.

6. A steel pipe degreasing system according to claim 5, characterized in that: The gas-liquid composite purge unit also includes a high-level distribution liquid tank. The liquid is distributed to the nozzle after passing through the high-level distribution liquid tank. The gas control component and the liquid control component include several one-way valves and drain valves. The pipeline also includes a U-shaped pipeline.

7. A steel pipe degreasing system according to any one of claims 1 to 6, characterized in that: The multifunctional swing arm units are divided into several groups and are evenly distributed along the axial direction of the steel pipe in the placement groove.

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