Internal thread pipe spinning lubricating oil way control system

Abstract

The utility model discloses an internal thread pipe spinning lubricating oil circuit control system which is characterized in that each spinning lubricating oil point is provided with a sensing feedback assembly, and a lubricating oil cooler is connected with a main lubricating oil tank and a heat dissipation cooling water supply pipeline and is connected with each spinning lubricating oil point through an oil supply pipeline; a cooling water pipeline control valve is arranged on the heat dissipation cooling water supply pipeline, a lubricating oil pipeline control valve is arranged on the oil supply pipeline, so that the sensing feedback assembly detects the pressure, flow and temperature of each spinning lubricating oil point, and the PLC control cabinet obtains the pressure, oil quantity and oil temperature of lubricating oil needed by each spinning lubricating oil point according to measured values. The temperature of the lubricating oil is adjusted by controlling the lubricating oil pipeline control valve, the working state of the lubricating oil pipeline control valve on the oil supply pipeline of each spinning lubricating oil point is controlled, the oil quantity and pressure of the lubricating oil conveyed to the corresponding spinning lubricating oil point are adjusted, and therefore the oil quantity, oil temperature and pressure of the lubricating oil conveyed to different spinning devices are effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of internal thread tube spinning, and particularly relates to a control system for the lubricating oil path of internal thread tube spinning. Background Art

[0002] During the spinning process of internal thread tubes, effective lubrication needs to be carried out using lubricating oil to avoid various quality problems such as scratches. In the existing spinning lubrication system, the lubricating oil during the spinning process of internal thread tubes is supplied singly, that is, each spinning device is equipped with an oil tank and an oil pump motor, and the lubricating oil is transported to the corresponding spinning device through the oil pump motor during spinning.

[0003] However, the existing spinning lubrication system cannot precisely control the oil quantity, oil temperature, and pressure of the lubricating oil. With the change of environmental temperature, during the spinning process of internal thread tubes, the supply of lubricating oil quantity and oil temperature may be too high, affecting the lubrication effect and causing quality problems, or the supply of oil quantity and oil temperature may be too low, resulting in lubrication surplus and increasing production costs. When multiple spinning devices operate simultaneously, the above problems will be more obvious, leading to the lubrication quality of internal thread tubes being easily affected by the external environment, with unstable quality, and at the same time, it will also cause on-site oil pollution and environmental pollution.

[0004] Therefore, how to effectively control the oil quantity, oil temperature, and pressure of the lubricating oil transported to different spinning devices, improve the lubrication efficiency, and ensure the processing quality of internal thread tubes has become an urgent problem to be solved in this field. Summary of the Utility Model

[0005] Aiming at the defects of the prior art, the purpose of the utility model is to provide a control system for the lubricating oil path of internal thread tube spinning that can precisely control the oil quantity, oil temperature, and pressure of the lubricating oil in different spinning devices.

[0006] To achieve the above purpose, the control system for the lubricating oil path of internal thread tube spinning provided by the utility model includes a total lubricating oil tank, and also includes

[0007] Several spinning lubrication points, each spinning lubrication point is respectively arranged in the corresponding spinning device,

[0008] A sensing and feedback component, the sensing and feedback component is respectively arranged on each spinning lubrication point, configured to be able to detect the pressure, flow rate, and temperature of the corresponding spinning lubrication point in real time,

[0009] A lubricating oil cooler, the first port of the lubricating oil cooler is connected to the total lubricating oil tank, the second port is connected to the cooling water supply pipeline for heat dissipation, a cooling water pipeline control valve is arranged on the cooling water supply pipeline for heat dissipation, the third port is connected to each spinning lubrication point through an oil supply pipeline, and a lubricating oil pipeline control valve is arranged on each oil supply pipeline,

[0010] The PLC control cabinet is connected to the sensing and feedback component, the lubricating oil pipeline control valve, and the cooling water pipeline control valve, and is configured to receive and process the pressure, flow rate, and temperature detected by the sensing and feedback component, obtain the pressure, oil quantity, and temperature of the lubricating oil required for the corresponding spinning lubrication point, and respectively control the working states of the lubricating oil pipeline control valve and the cooling water pipeline control valve of the corresponding spinning lubrication point.

[0011] Further, the sensing and feedback component includes a temperature detection sensor, a pressure detection sensor, and a flow meter.

[0012] Further, the oil supply pipeline includes a main oil supply pipeline and a plurality of branch oil supply pipelines connected to the main oil supply pipeline, and the branch oil supply pipelines are respectively connected to each spinning lubrication point.

[0013] Further, the lubricating oil pipeline control valves are respectively arranged on each branch oil supply pipeline.

[0014] Further, the lubricating oil pipeline control valve is composed of a pneumatically regulated pressure reducing valve and a proportional valve.

[0015] Further, the cooling water pipeline control valve is composed of a flow regulating valve.

[0016] Further, it further includes an oil return pipeline connecting the main lubricating oil tank, and the oil return pipeline is respectively connected to each spinning lubrication point.

[0017] Further, the first port of the lubricating oil cooler is connected to the main lubricating oil tank through an oil pumping pump, and an oil pumping pump pipeline control valve is provided on the oil pumping pump.

[0018] In the internal thread tube spinning lubricating oil pipeline control system provided by the present utility model, a sensing and feedback component is respectively arranged at each spinning lubricating oil point in each spinning device. The lubricating oil cooler is connected to the main lubricating oil tank and the heat dissipation cooling water supply pipeline, so that the main lubricating oil tank and the heat dissipation cooling water supply pipeline respectively transport lubricating oil and cooling water into the lubricating oil cooler for heat exchange to adjust the temperature of the lubricating oil. Moreover, the lubricating oil cooler is respectively connected to each spinning lubricating oil point through an oil supply pipeline, and the temperature-adjusted lubricating oil is respectively transported into each spinning lubricating oil point.

[0019] Meanwhile, a cooling water pipeline control valve is provided on the cooling water supply pipeline for heat dissipation, and a lubricating oil pipeline control valve is provided on each oil supply pipeline, so that the sensing and feedback component can detect the pressure, flow rate and temperature of each spinning lubricating oil point respectively, enabling the PLC control cabinet to receive and process the measured values, and respectively obtain the pressure, oil volume and temperature of the lubricating oil required for each spinning lubricating oil point, so as to control the working state of the cooling water pipeline control valve, adjust the cooling water flow rate transported by the cooling water supply pipeline for heat dissipation to the lubricating oil cooler, and precisely adjust the temperature of the lubricating oil. At the same time, the working states of the lubricating oil pipeline control valves on the oil supply pipelines corresponding to each spinning lubricating oil point are respectively controlled to adjust the oil volume and pressure of the lubricating oil transported to the corresponding spinning lubricating oil points, thereby effectively controlling the oil volume and pressure of the lubricating oil transported to different spinning devices and keeping the oil temperature within the set range, thus improving the lubrication effect. Description of the Drawings

[0020] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the internal thread tube spinning lubricating oil pipeline control system provided by the present utility model;

[0022] Figure 2 is Figure 1 partial enlarged view;

[0023] Figure 3 It is a schematic diagram of the principle of the internal thread tube spinning lubricating oil pipeline control system provided by the present utility model; Description of the Drawings:

[0025] 1. Spinning lubricating oil point; 11. First spinning lubricating oil point; 12. Second spinning lubricating oil point; 13. Third spinning lubricating oil point;

[0026] 2. Sensing and feedback component; 21. First sensing and feedback component; 22. Second sensing and feedback component; 23. Third sensing and feedback component;

[0027] 3. Total lubricating oil tank; 4. Lubricating oil cooler; 41. First port; 42. Second port; 43. Third port; 44. Fourth port; 5. PLC control cabinet;

[0028] 6. Oil supply pipeline; 61. Total oil supply pipeline; 62. Branch oil supply pipeline; 621. First branch oil supply pipeline; 622. Second branch oil supply pipeline; 623. Third branch oil supply pipeline; 63. Lubricating oil pipeline control valve; 631. First lubricating oil pipeline control valve; 632. Second lubricating oil pipeline control valve; 633. Third lubricating oil pipeline control valve;

[0029] 7. Cooling water supply pipeline for heat dissipation; 71. Cooling water pipeline control valve; 72. Cooling water outlet for heat dissipation;

[0030] 8. Oil return pipeline; 81. Main oil return pipeline; 82. Branch oil return pipeline;

[0031] 9. Oil extraction pump; 91. Oil extraction pump pipeline control valve. Detailed implementation mode

[0032] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific drawings.

[0033] See Figure 1 and Figure 3 , which shows an example of the internal thread tube spinning lubricating oil path control system provided by the present utility model.

[0034] As can be seen from the figure, in this example, the internal thread tube spinning lubricating oil path control system mainly includes spinning lubrication points 1, sensing and feedback components 2, main lubricating oil tank 3, lubricating oil cooler 4 and PLC control cabinet 5 respectively arranged in a number of spinning devices.

[0035] Each spinning lubrication point 1 is respectively arranged in the corresponding spinning device. As an example, in this example, the first spinning lubrication point 11, the second spinning lubrication point 12 and the third spinning lubrication point 13 are respectively arranged in three spinning devices, and are respectively used to lubricate the three internal thread tubes being processed arranged in the three spinning devices.

[0036] Furthermore, each spinning lubrication point 1 is respectively provided with a sensing and feedback component 2, and the sensing and feedback component 2 can detect the pressure, flow rate and temperature of the corresponding spinning lubrication point 1 in real time.

[0037] As an example, in this example, the first spinning lubrication point 11, the second spinning lubrication point 12 and the third spinning lubrication point 13 are respectively provided with a first sensing and feedback component 21, a second sensing and feedback component 2 and a third sensing and feedback component 23, so that the first sensing and feedback component 21, the second sensing and feedback component 2 and the third sensing and feedback component 23 can respectively detect the pressure, flow rate and temperature of the first spinning lubrication point 11, the second spinning lubrication point 12 and the third spinning lubrication point 13 in real time, and provide measurement values for the pressure, oil quantity and temperature of the lubricating oil required by the corresponding spinning lubrication point.

[0038] Among them, the sensing feedback component 2 mainly includes a temperature detection sensor, a pressure detection sensor, and a flowmeter, so that the temperature detection sensor can detect the temperature of the corresponding spinning lubrication point 1 in real time, the pressure detection sensor can detect the pressure of the corresponding spinning lubrication point 1 in real time, the flowmeter can detect the flow rate of the temperature of the corresponding spinning lubrication point 1 in real time, and transmit the measured values to the PLC control cabinet 5 in real time, so that the PLC control cabinet processes according to the measured values to obtain the oil volume, pressure, and temperature of the lubricating oil required for the corresponding spinning lubrication point 1.

[0039] Combined Figure 2 , in order to adjust the temperature of the lubricating oil delivered to the spinning lubrication point 1, the total lubricating oil tank 3 is connected to the lubricating oil cooler 4. The first port 41 of the lubricating oil cooler 4 is connected to the total lubricating oil tank 3 through an oil pumping pump 9, so that the oil pumping pump 9 transports the lubricating oil in the total lubricating oil 3 to the lubricating oil cooler 4. The second port 42 is connected to the cooling water supply pipeline 7 for cooling, so that the cooling water supply pipeline 7 transports the cooling water to the lubricating oil cooler 4, so that the lubricating oil and the cooling water can perform heat exchange in the lubricating oil cooler 4 to adjust the temperature of the lubricating oil. The third port 43 of the lubricating oil cooler 4 is connected to each spinning lubricating oil point 1 through an oil supply pipeline 6, and the temperature-adjusted lubricating oil is transported to each spinning lubricating oil point 1, thereby adjusting the oil temperature of the lubricating oil delivered from the total lubricating oil tank 3 to the spinning lubrication point 1.

[0040] Furthermore, an oil pumping pipeline control valve 91 is provided on the pipeline where the oil pumping pump 9 is connected to the total lubricating oil tank 3. Here, the oil pumping pipeline control valve 91 is preferably composed of a flow regulating valve. By controlling the opening or working state of the oil pumping pipeline control valve 91 through the PLC control cabinet 5, the oil volume of the lubricating oil delivered from the total lubricating oil tank 3 to the lubricating oil cooler 4 can be adjusted.

[0041] Similarly, a cooling water pipeline control valve 71 is provided on the cooling water supply pipeline 7. Here, the cooling water pipeline control valve 71 is preferably composed of a flow regulating valve. By controlling the working state of the cooling water pipeline control valve 71 through the PLC control cabinet 5, the cooling water flow rate delivered from the cooling water supply pipeline 7 to the lubricating oil cooler 4 can be adjusted.

[0042] Thus, by controlling the cooling water pipeline control valve 71 through the PLC control cabinet 5, the temperature of the lubricating oil after heat exchange between the lubricating oil and the cooling water in the lubricating oil cooler 4 can be adjusted. When the cooling water flow rate is large, the temperature of the lubricating oil after heat exchange is low. When the cooling water flow rate is small, the temperature of the lubricating oil after heat exchange is high, thereby adjusting the oil temperature of the lubricating oil in the lubricating oil cooler 4.

[0043] Furthermore, the lubricating oil cooler 4 is respectively connected to each spinning lubrication point 1 through an oil supply pipeline 6, and the temperature-adjusted lubricating oil is transported to each spinning lubrication point 1 through the oil supply pipeline 6.

[0044] Specifically, the oil supply pipeline 6 includes a main oil supply pipeline 61 and branch oil supply pipelines 62. The main oil supply pipeline 61 is connected to the lubricating oil cooler 4. One end of several branch oil supply pipelines 62 is connected to the main oil supply pipeline 61, and the other ends are respectively connected to each spinning lubrication point 1. Thus, the main lubricating oil tank 3 can synchronously transport lubricating oil to each branch oil supply pipeline 62 through the main oil supply pipeline 61, and synchronously transport the lubricating oil to each spinning lubrication point 1 through the branch oil supply pipelines 62, so as to improve the spinning lubrication efficiency.

[0045] For example, refer to Figure 1 In this example, one end of the first branch oil supply pipeline 621, the second branch oil supply pipeline, and the third branch oil supply pipeline 623 are respectively connected to the main oil supply pipeline 61, and the other ends are respectively connected to the corresponding first spinning lubrication point 11, second spinning lubrication point 12, and third spinning lubrication point 13, so that the main oil supply pipeline 61 can synchronously transport the temperature-adjusted lubricating oil to the first spinning lubrication point 11, second spinning lubrication point 12, and third spinning lubrication point 13 through the first branch oil supply pipeline 621, the second branch oil supply pipeline, and the third branch oil supply pipeline 623, enabling multiple spinning lubrication points 1 to work synchronously and improving the efficiency.

[0046] In order to control the oil volume and pressure of the lubricating oil in each spinning lubrication point 1, lubricating oil pipeline control valves 63 are respectively provided on each branch oil supply pipeline 62. By respectively controlling the working states of the lubricating oil pipeline control valves 63 on each branch oil supply pipeline 62, the oil volume and pressure of the lubricating oil in each branch oil supply pipeline 62 can be respectively controlled, thereby realizing the control of the oil volume and pressure of the lubricating oil transported to each spinning lubrication point 1.

[0047] For example, in this example, a first lubricating oil pipeline control valve 631, a second lubricating oil pipeline control valve 632, and a third lubricating oil pipeline control valve 633 are respectively provided on the first branch oil supply pipeline 621, the second branch oil supply pipeline, and the third branch oil supply pipeline 623. The PLC control cabinet can respectively control the working states of the first lubricating oil pipeline control valve 631, the second lubricating oil pipeline control valve 632, and the third lubricating oil pipeline control valve 633, thereby respectively controlling the oil volume and pressure of the lubricating oil transported to the first branch oil supply pipeline 621, the second branch oil supply pipeline, and the third branch oil supply pipeline 623, ensuring that the lubricating oil in each spinning lubrication point 1 can meet its required working oil volume and pressure.

[0048] Thus, the main lubricating oil tank 3 can cooperate with the main oil supply pipeline 61, the branch oil supply pipelines 62, and the lubricating oil pipeline control valves 63 to synchronously transport lubricating oil to each spinning lubrication point 1, and respectively control the oil volume and pressure of the lubricating oil in each spinning lubrication point 1 during the transportation process, so as to improve the spinning lubrication efficiency.

[0049] Furthermore, the lubricating oil pipeline control valve 63 is composed of a pneumatically regulated pressure reducing valve and a proportional valve, so that the pneumatically regulated pressure reducing valve can adjust the pressure of the lubricating oil in the branch oil supply pipeline 62 by regulating the opening of the valve core, and the proportional valve can adjust the pressure and flow rate of the lubricating oil in the branch oil supply pipeline 62 by adjusting the voltage of the electromagnet in the proportional valve, so that the lubricating oil pipeline control valve 63 can regulate the oil volume and pressure of the lubricating oil transported from the branch oil supply pipeline 62 to the spinning lubrication point 1.

[0050] Combined with Figure 3 , in order to accurately control the oil volume, pressure and temperature of the lubricating oil at each spinning lubrication point 1, the PLC control cabinet 5 is connected to the corresponding sensing feedback component 2 at each spinning lubrication point 1, the corresponding lubricating oil pipeline control valve 63 at each spinning lubrication point 1, the oil pumping pipeline control valve 91 and the cooling water pipeline control valve 71 on the cooling water supply pipeline 7, so that the PLC control cabinet 5 can process the measured values of the spinning lubrication point 1 through the sensing feedback component 2, obtain the oil volume, pressure and temperature of the lubricating oil required by the corresponding spinning lubrication point 1, and control the working states of the corresponding lubricating oil pipeline control valve 63, the oil pumping pipeline control valve 91 and the cooling water pipeline control valve 71, so as to control the oil temperature, pressure and flow rate of the lubricating oil transported to each spinning lubrication point 1.

[0051] Specifically, an analog module is provided in the PLC control cabinet 5, which can collect the pressure, flow rate and temperature analog signals of each spinning lubrication point 1 detected by the sensing feedback component 2 and convert them into digital signals that can be received by the PLC control cabinet 5, so that the PLC control cabinet 5 can process the pressure, flow rate and temperature of each spinning lubrication point 1 respectively, obtain the pressure, oil volume and temperature of the lubricating oil required by the corresponding spinning lubrication point 1, and thus control the working states of the control valves.

[0052] Furthermore, the PLC control cabinet 5 controls the operation of the oil pumping pipeline control valve 91 according to the total lubricating oil volume required by the obtained spinning lubrication point 1 to control the total lubricating oil volume transported from the total lubricating oil tank 3 to the lubricating oil cooler 4, and at the same time controls the operation of the cooling water pipeline control valve 71 according to the obtained temperature to control the cooling water flow rate passing through the cooling water supply pipeline 7, so as to control the lubricating oil temperature in the lubricating oil cooler 4.

[0053] Correspondingly, the PLC control cabinet 5 controls the operation of the corresponding lubricating oil pipeline control valve 63 according to the lubricating oil pressure and oil volume required by each obtained spinning lubrication point 1 to respectively control the lubricating pressure and oil volume passing through the branch oil supply pipeline 62, thereby regulating the lubricating pressure, oil volume and temperature of each spinning lubrication point 1.

[0054] For example, when the temperature of the inner threaded tube being processed remains constant at the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13, and the lubricating oil temperatures required for each spinning lubrication point 1 are the same, the PLC control cabinet 5 can control the total lubricating oil tank to synchronously supply lubricating oil to each spinning lubrication point 1. For example, the PLC control cabinet 5 controls the lubricating oil temperature in the lubricating oil cooler 4 to correspond to the lubricating oil temperatures required for the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13 through the oil pumping pipeline control valve 91 and the cooling water pipeline control valve 71, so that the total lubricating oil tank 3 can synchronously supply lubricating oil to the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13, and respectively control the lubricating oil flow rate and pressure delivered to the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13 through the lubricating oil pipeline control valves 63 on the corresponding branch oil supply pipelines 62 of the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13, thereby improving the conveying efficiency of the lubricating oil.

[0055] Further, when the temperature of the inner threaded tube being processed at one or more of the first spinning lubrication point 11, the second spinning lubricating oil point 12, and the third spinning lubricating oil point 13 changes, the PLC control cabinet 5 can control the lubricating oil temperature delivered from the total lubricating oil tank 3 to each spinning lubrication point 1 to remain constant. For example, when the temperature of the inner threaded tube being processed at the first spinning lubrication point 11 changes, the sensing and feedback component 2 feeds back the detected temperature value of the first spinning lubrication point 11 to the PLC control cabinet 5, so that the PLC control cabinet 5 controls the working state of the first lubricating oil pipeline control valve 631 corresponding to the first spinning lubrication point 11 to adjust the lubricating oil flow rate entering the first spinning lubrication point 11, so as to adjust the temperature of the lubricating oil in the first branch oil supply pipeline 621 corresponding to the first spinning lubrication point 11, and keep the lubricating oil temperature delivered to the first spinning lubrication point 11 within the range set by the PLC control cabinet 5.

[0056] Further, the control system is also provided with an oil return pipeline 8. The oil return pipeline 8 includes a total oil return pipeline 81 and branch oil return pipelines 82. The total oil return pipeline 81 is connected to the total lubricating oil tank 3. One end of several branch oil return pipelines 82 is connected to the total oil return pipeline 81, and the other end is respectively connected to each spinning lubrication point 1, so that the excess lubricating oil in each spinning lubrication point 1 can flow back into the total oil return pipeline 81 through the corresponding branch oil return pipeline 82 and flow back into the total lubricating oil tank 3 through the total oil return pipeline 81, thereby enabling the lubricating oil to be recycled and reducing the oil consumption.

[0057] Further, the fourth port 44 of the lubricating oil cooler 4 is connected to the heat dissipation cooling water outlet 72, so that the excess cooling water can flow back through the heat dissipation cooling water outlet 72, reducing the consumption of the cooling water.

[0058] The internal-thread tube spinning lubricating oil path control system provided by the utility model adopts the mutual cooperation of the sensing and feedback components 2 in each spinning lubricating point 1 with the total lubricating oil tank 3, the lubricating oil cooler 4 and the PLC control cabinet 5 to realize the control of the lubricating oil path of each spinning lubricating point 1, so as to accurately control the oil quantity and pressure of the lubricating oil in different spinning devices, keep the oil temperature within the set range, improve the lubrication efficiency, reduce the wear of the pipe material, and improve the product quality.

[0059] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art of this industry should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. An internally threaded tube spinning lubricating oil circuit control system, comprising a main lubricating oil tank, characterized in that: include Several spinning lubrication points, each of which is arranged in a corresponding spinning device. A sensor feedback component is provided at each spinning lubrication point and is configured to detect the pressure, flow rate and temperature of the corresponding spinning lubrication point in real time. A lubricating oil cooler, wherein the first port of the lubricating oil cooler is connected to the main lubricating oil tank, the second port is connected to a heat dissipation cooling water supply pipeline, a cooling water pipeline control valve is provided on the heat dissipation cooling water supply pipeline, and the third port is connected to each spinning lubrication point through an oil supply pipeline, each oil supply pipeline is provided with a lubricating oil pipeline control valve, A PLC control cabinet is connected to the sensor feedback component, the lubricating oil pipeline control valve and the cooling water pipeline control valve, and is configured to receive and process the pressure, flow and temperature detected by the sensor feedback component, obtain the pressure, oil volume and temperature of the lubricating oil required for the corresponding spinning lubrication point, and respectively control the working states of the lubricating oil pipeline control valve and the cooling water pipeline control valve of the corresponding spinning lubrication point.

2. The internal threaded tube spinning lubrication oil circuit control system according to claim 1 is characterized in that: The sensor feedback component includes a temperature detection sensor, a pressure detection sensor and a flow meter.

3. The internal threaded tube spinning lubrication oil circuit control system according to claim 1, characterized in that: The oil supply pipeline comprises a main oil supply pipeline and a plurality of branch oil supply pipelines connected to the main oil supply pipeline, and the branch oil supply pipelines are respectively connected to each spinning lubrication point.

4. The internally threaded tube spinning lubricating oil circuit control system according to claim 3 is characterized in that: The lubricating oil pipeline control valve is respectively arranged on each branch oil supply pipeline.

5. The internal threaded tube spinning lubrication oil circuit control system according to claim 4, characterized in that: The lubricating oil pipeline control valve is composed of an air-regulated pressure reducing valve and a proportional valve.

6. The internally threaded tube spinning lubricating oil circuit control system according to claim 1, characterized in that: The cooling water pipeline control valve is composed of a flow regulating valve.

7. The internally threaded tube spinning lubricating oil circuit control system according to claim 1, characterized in that: It also includes an oil return pipeline connected to the main lubricating oil tank, and the oil return pipeline is respectively connected to each spinning lubrication point.

8. The internally threaded tube spinning lubricating oil circuit control system according to claim 1, characterized in that: The first port of the lubricating oil cooler is connected to the main lubricating oil tank through an oil pump, and an oil pump pipeline control valve is provided on the oil pump.

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