Quenching tank capable of automatically adjusting PAG medium concentration

Abstract

The utility model discloses a quenching tank capable of automatically adjusting the concentration of a PAG medium, and aims to solve the problem of unstable cooling caused by the change of the concentration of a PAG polymer in the quenching process of large workpieces such as a wind power main shaft and the like. The quenching tank integrates feeding, detecting, liquid discharging and cleaning functions, and automatic management of quenching media is achieved through the feeding screw and the peristaltic pump which are driven by the servo motor. The linear light source, the standard sample cuvette and the to-be-detected sample cuvette are matched with the detector, so that the quenching medium concentration is monitored in real time and accurately regulated and controlled, and the consistency and stability of the quenching effect are ensured. Besides, the equipment is further provided with an electronic liquid level meter, an optical filter and an isolation groove, so that waste liquid is conveniently collected and discharged, water stains are effectively prevented from entering the detection device, and the equipment is protected from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of quenching equipment technology, specifically to a PAG medium quenching device for wind turbine main shafts. Background Technology

[0002] For large-volume hollow wind turbine main shafts, which can reach heights of 4-5 meters and outer diameters of over 2 meters, a water-diluted quenching fluid, PAG (polyethylene glycol), is commonly used during quenching to maintain uniform cooling and control and stabilize the multi-scale microstructure of the steel structure. When the workpiece is quenched, once the temperature of the surrounding liquid rises above the solution's cloud point, the PAG polymer desolvents from the solution and suspends in the quenching fluid. Due to its good wettability, it adheres to the workpiece surface, forming a water-rich coating that encapsulates the workpiece. This coating regulates the cooling rate of the water, preventing quenching cracks in the workpiece.

[0003] During long-term use, the relative concentration of PAG polymer gradually decreases due to workpiece carry-over and high-temperature oxidative decomposition. This leads to a faster quenching cooling rate, making the workpiece more prone to cracking during quenching, affecting the quenching effect, and consequently causing insufficient hardness, uneven microstructure, and reduced mechanical properties and quality. Currently, PAG concentration in quenching tanks is typically measured using a refractometer, followed by adjustment of the PAG dosage. However, this method results in significant data fluctuations with each measurement, potentially adversely affecting the casting. Therefore, it is necessary to develop a device that can adjust the PAG concentration in real time. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quenching tank that automatically adjusts the concentration of PAG medium, so as to quickly and accurately measure the concentration of PAG medium in the quenching tank and maintain it within a certain range.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A quenching tank with automatically adjustable PAG medium concentration, comprising:

[0007] The quenching tank has a drain pipe connected to its bottom and a drain valve connected to it. The top of the quenching tank has a feed pipe connected to it and a storage tank connected to it via a feed electronic valve.

[0008] The detection device includes a housing, inside which a lead screw slide rail is provided. A linear light source is slidably connected to the lead screw slide rail. A standard sample cuvette and a test sample cuvette are arranged on the same side along the movement direction of the lead screw slide rail. A detector is arranged on the side of the standard sample cuvette and the test sample cuvette away from the linear light source. The lead screw slide rail is connected to the output end of a servo motor.

[0009] Liquid pipetting device: The housing is also equipped with a first peristaltic pump, the first peristaltic pump is equipped with an inlet pipe, the inlet end of the inlet pipe passes through the housing and is connected to the outlet pipe, the linear light source extends and is equipped with a connecting rod, and the outlet end of the inlet pipe is snapped onto the connecting rod;

[0010] The servo motor, detector, line light source, feed screw, and first peristaltic pump are electrically connected to an industrial control board.

[0011] Furthermore, an electronic level gauge is also installed in the quenching tank, and the electronic level gauge is electrically connected to the industrial control board.

[0012] Furthermore, the bottom openings of the standard sample cuvette and the sample cuvette are connected to a base and a collection tube, respectively. The collection tube is connected to one end of a one-way electronic valve, and the other end of the one-way electronic valve is connected to a drain tube.

[0013] Furthermore, a second peristaltic pump is also provided, which is equipped with a cleaning tube. A support rod extends from the side of the connecting rod, and the liquid outlet end of the cleaning tube is connected to the support rod.

[0014] Furthermore, the shell openings above the standard sample cuvette and the sample cuvette to be tested are hinged with cover plates.

[0015] Furthermore, a filter is provided between the standard sample cuvette and the test sample cuvette and the line light source.

[0016] Furthermore, a display screen is provided on the outside of the housing, and the display screen is electrically connected to the industrial control board.

[0017] Furthermore, both the filter and the detector are provided with outer plates around their peripheries, and side plates are connected between the outer plates. The outer plates and the side plates cooperate with the bottom surface of the housing to form an isolation groove.

[0018] The advantages and beneficial effects of this utility model are as follows:

[0019] 1. The automatic feeding, detection, and drainage of the quenching medium are achieved through a feed screw driven by a first servo motor and two peristaltic pumps, reducing manual operation and improving production efficiency. Utilizing a linear light source, standard sample cuvettes, test sample cuvettes, and detectors in the detection device, the concentration of the medium in the quenching tank can be monitored in real time and precisely controlled via an industrial control board to ensure the stability and consistency of the quenching effect.

[0020] 2. A drain pipe is connected to the bottom of the quenching tank, and a feed pipe is connected to the top. After the detection device detects the change in PAG concentration, it can automatically control the feed electronic valve to accurately dispense high-concentration PAG solution.

[0021] 3. This utility model integrates multiple functions such as detection, liquid transfer, and cleaning. It can not only automatically adjust the concentration of quenching medium, but also perform self-cleaning of the equipment. The bottom openings of the standard sample cuvette and the sample cuvette to be tested are connected to the base and respectively to the liquid collection pipe. The liquid collection pipe is connected to one end of the one-way electronic valve, and the other end of the one-way electronic valve is connected to the drain pipe, which facilitates the collection and discharge of waste liquid.

[0022] 4. Both the filter and the detector are equipped with outer plates, and side plates are connected between the outer plates. The outer plates and side plates, together with the bottom surface of the housing, form an isolation groove to prevent water stains from entering the detection device and affecting the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the detection device of this utility model;

[0025] In the picture:

[0026] 1. Quenching tank; 2. Drain pipe; 3. Drain valve; 4. Feed pipe; 5. Feed electronic valve; 6. Storage tank; 7. Detection device; 8. Housing; 9. Lead screw and slide rail; 10. Linear light source; 11. Standard sample cuvette; 12. Test sample cuvette; 13. Detector; 14. Servo motor; 15. First peristaltic pump; 16. Inlet pipe; 17. Connecting rod; 18. Support rod; 19. Base; 20. Collection pipe; 21. One-way electronic valve; 22. Second peristaltic pump; 23. Cleaning pipe; 24. Filter; 25. Outer plate; 26. Side plate; 27. Isolation tank; 28. Cover plate; 29. ​​Display screen; 30. Industrial control board; 31. Electronic level gauge. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0028] Example

[0029] A quenching tank with automatically adjustable PAG medium concentration, comprising:

[0030] The quenching tank 1 has a drain pipe 2 connected to its bottom, which is connected to a drain valve 3. The top of the quenching tank 1 has a feed pipe 4 connected to it, which is connected to a storage tank 6 via an electronic feed valve 5. An electronic level gauge 31 is also installed inside the quenching tank 1.

[0031] Detection device 7 includes a housing 8, inside which a lead screw slide rail 9 is provided. A linear light source 10 is slidably connected to the lead screw slide rail 9. A standard sample cuvette 11 and a test sample cuvette 12 are arranged on the same side along the direction of movement of the lead screw slide rail 9. A detector 13 is arranged on the side of the standard sample cuvette 11 and the test sample cuvette 12 away from the linear light source 10. The lead screw slide rail 9 is connected to the output end of a servo motor 14.

[0032] The pipetting device includes a first peristaltic pump 15 inside the housing 8. The first peristaltic pump 15 has an inlet pipe 16, the inlet end of which passes through the housing 8 and connects to the outlet pipe 2. A connecting rod 17 extends from the line light source 10. The outlet end of the inlet pipe 16 is engaged with the connecting rod 17 and can move in conjunction with the lead screw slide rail 9 to align with the positions of the two cuvettes. The standard sample cuvette 11 and the test sample cuvette 12 have bottom openings and are connected to a collection pipe 20 via a base 19. The collection pipe is connected to one end of a one-way electronic valve 21, and the other end of the one-way electronic valve 21 is connected to the outlet pipe 2. A second peristaltic pump 22 is also installed inside the housing 8. The second peristaltic pump 22 has a cleaning pipe 23. A support rod 18 extends from the side of the connecting rod 17. The outlet end of the cleaning pipe 23 is engaged with the support rod 18, and its operation is similar to that of the inlet pipe 16. A filter 24 is disposed between the standard sample cuvette 11 and the sample cuvette 12 and the line light source 10. An outer plate 25 is disposed around the filter 24 and the detector 13. A side plate 26 is disposed between the outer plates 25. The outer plates 25 and the side plates 26 cooperate with the bottom surface of the housing 8 to form an isolation groove 27.

[0033] The housing 8 above the standard sample cuvette 11 and the sample cuvette 12 has an opening and is hinged with a cover plate 28. A display screen 29 is installed on the outside of the housing 8, and the display screen 29 is electrically connected to the industrial control board 30. The servo motor, detector, linear light source, feed screw, and first and second peristaltic pumps are all connected to the industrial control board 30 via circuitry.

[0034] The working principle of this utility model is as follows:

[0035] When it is necessary to detect the concentration of PAG medium in the quenching tank, the servo motor 14 drives the lead screw slide rail 9 to move, causing the line light source 10 to pass through the standard sample cuvette 11 and the test sample cuvette 12 respectively to obtain corresponding data. The light emitted by the line light source 10 passes through the test sample and the standard sample respectively through the lead screw guide rail adjusted by the industrial control board and is received by the detector 13. The detector 13 converts the detected light signal into an electrical signal and transmits it to the industrial control board 30. The industrial control board 30 compares and analyzes the relevant parameters of the standard sample and the test sample based on the received signal, thereby determining the concentration of PAG medium in the quenching tank. Specifically, the ratio of the refractive index of the test sample to the refractive index of the standard sample is obtained. Multiplying this ratio by the concentration of the standard sample yields the PAG concentration of the test sample. The standard sample is preferably obtained by sampling the liquid in the quenching tank before quenching.

[0036] During the movement of the lead screw guide rail, the inlet pipe 16 moves with the connecting rod 17, with its outlet end aligned with the location of the cuvette 12 to be tested. The first peristaltic pump 15 draws the sample from the drain pipe 2 and then quantitatively delivers it into the cuvette 12 for measurement. Simultaneously, the cleaning pipe 23 moves with the support rod 18, its movement coordinating with the inlet pipe 16 to facilitate subsequent cleaning operations. After the measurement is completed, the one-way electronic valve 21, controlled by the industrial control board 30, opens and closes to discharge the measured sample. The second peristaltic pump 22, controlled by the industrial control board, squeezes the cleaning pipe 23, which is connected to an external water source. Similar to the movement of the inlet pipe during measurement, it cleans the cuvette to prevent residual media from affecting the next test. The cleaned liquid is discharged through the one-way electronic valve 21 and the collection pipe 20. Preferably, the industrial control board 30 periodically repeats the above mechanism and its related actions and completes a reset.

[0037] During the concentration adjustment stage, those skilled in the art will understand that a higher concentration of PAG medium in the quenching tank has a relatively longer quenching time, with less adverse effect. For castings with high requirements, dilution with water can be performed if necessary. When the PAG concentration is low, the industrial control board 30 controls the drain valve 3 to open, allowing the externally stored concentrated medium to be quantitatively fed into the quenching tank 1 from the storage tank 3 via the feed electronic valve 5 regulated by the industrial control board. To ensure accurate concentration adjustment, an electronic level gauge 31 is preferably installed in the quenching tank to facilitate the calculation of the feed rate by the industrial control board 30. The outer plate 25 and side plate 26, together with the bottom surface of the housing 8, form an isolation groove 27 to prevent liquid leakage during testing from damaging the equipment or affecting the test results; the cover plate 28 can be opened or closed as needed for convenient operation and maintenance.

[0038] Throughout the entire operation, the industrial control board 30 transmits the detected concentration data and the operating status of each device to the display screen 29 for display. Operators can use the display screen 29 to monitor the concentration of PAG medium in the quenching tank and the system operating status in real time, so as to make timely adjustments and monitoring.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quench tank for automatically adjusting the concentration of PAG medium, characterized by, The utility model relates to a quenching tank, which comprises a quenching tank (1) with a drain pipe (2) connected to a drain valve (3) at the bottom and an inlet pipe (4) connected to a storage tank (6) through an inlet electronic valve (5) at the top. A detection device (7) is arranged in the housing (8) and comprises a lead screw slide rail (9) connected to a linear light source (10), a standard sample cuvette (11) and a sample cuvette (12) arranged on the same side of the lead screw slide rail (9) along the moving direction of the lead screw slide rail (9), a detector (13) arranged on the side of the standard sample cuvette (11) and the sample cuvette (12) away from the linear light source (10), and a servo motor (14) connected to the output end of the lead screw slide rail (9). A liquid transfer device is arranged in the housing (8) and comprises a first peristaltic pump (15) provided with an inlet pipe (16) connected to the drain pipe (2) through the housing (8), and a connecting rod (17) extended from the linear light source (10), wherein the outlet end of the inlet pipe (16) is clamped to the connecting rod (17). The electronic valve (5), the linear light source (10), the detector (13), the servo motor (14), and the first peristaltic pump (15) are electrically connected to an industrial control board (30).

2. The quenching tank according to claim 1, wherein an electronic liquid level gauge (31) is further arranged in the quenching tank (1) and electrically connected to the industrial control board (30).

3. The quenching tank according to claim 1, wherein the standard sample cuvette (11) and the sample cuvette (12) are open at the bottom, connected to a collecting pipe (20) through a base (19), and connected to the drain pipe (2) through a one-way electronic valve (21).

4. The quenching tank according to claim 3, wherein a second peristaltic pump (22) is further arranged in the housing (8) and provided with a cleaning pipe (23), and the connecting rod (17) is extended to a support rod (18), wherein the outlet end of the cleaning pipe (23) is clamped to the support rod (18).

5. The quenching tank according to claim 4, wherein the housing (8) is open above the standard sample cuvette (11) and the sample cuvette (12) and hinged with a cover plate (28).

6. The quenching tank according to claim 5, wherein a filter (24) is arranged between the standard sample cuvette (11), the sample cuvette (12), and the linear light source (10).

7. The quenching tank according to claim 6, wherein ​ ​ ​ ​ ​ ​ The filter (24) and the detector (13) are both provided with outer plates (25), and the outer plates (25) are connected with side plates (26) arranged between the outer plates (25), and the outer plates (25) and the side plates (26) cooperate with the bottom surface of the shell (8) to form isolation grooves (27).

8. The quench tank of claim 1, wherein, An outer side of the shell (8) is provided with a display screen (29), and the display screen (29) is electrically connected with the industrial control board (30).

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