A gear box for twin-screw extruder

Abstract

The present invention relates to a gearbox for a twin-screw extruder applied in the technical field of gearboxes, comprising a gearbox main body and a circulating filter and chip detection mechanism, the circulating filter and chip detection mechanism comprising a circulating pump, the suction end and the output end of the circulating pump being connected to the interior of the gearbox main body through a filter detection component and a return line respectively, the filter detection component comprising a suction pipe connected to the suction end of the circulating pump and an oil outlet pipe connected to the interior of the gearbox main body, a filter detection component being arranged between the suction pipe and the oil outlet pipe, the filter detection component comprising a detection cylinder having two ends respectively connected to the suction pipe and the oil outlet pipe; the circulating filter and chip detection mechanism can regularly and automatically detect the lubricating oil in the gearbox to detect whether there are large metal debris in the lubricating oil, and can issue an alarm when large metal debris is detected in the lubricating oil, thereby prompting relevant technical personnel to shut down the gearbox for inspection and maintenance in a timely manner, thereby greatly improving the safety of the gearbox.

Description

Technical Field

[0001] The present invention relates to a gear box, in particular to a gear box for a twin-screw extruder applied in the technical field of gear boxes. Background Art

[0002] With the continuous development of extruder technology, twin-screw extruders are increasingly used in industries such as plastics processing, chemicals, and food. The gearbox is the core transmission device of a twin-screw extruder. Its function is to convert the power of the motor into the rotational motion of the twin screws through gear meshing, achieving speed and torque adjustment to meet the extrusion process's requirements for material mixing, plasticization, and extrusion.

[0003] The invention patent with publication number CN118564633B discloses a gearbox for a twin-screw extruder, which realizes automatic cleaning of iron chips, reduces maintenance workload, and the thoroughly filtered lubricating oil drips back to the bottom of the liquid storage tank, preparing for the next lubrication cycle, realizing continuous, efficient and clean use of lubricating oil.

[0004] The invention patent application with publication number CN118375717A discloses a twin-screw extruder gearbox and its use method. In this application, a collecting component is connected to the bottom of the gearbox body, a sliding groove is provided on the inner wall of the gearbox body, and a moving component is slidably connected in the sliding groove. The collecting component is used to collect the liquid for lubricating and cooling the gear set, and the moving component is used to concentrate the liquid at the bottom of the inner wall of the gearbox body.

[0005] Lubricating oil plays a vital role in the operation of a gearbox, ensuring continuous lubrication of gears and bearings and reducing wear. Friction and wear inevitably generate metal debris during gearbox operation. These debris can easily mix into the lubricant, affecting its lubricating properties and potentially causing cascading equipment failures. Therefore, regular cleaning or replacement of the lubricant is essential. Under normal circumstances, metal debris is generally small (usually less than 15 μm). However, in abnormal circumstances (such as abnormal wear of gears and bearings), larger metal debris (e.g., larger than 50 μm) can appear. The presence of large metal debris not only indicates a possible gearbox operation anomaly but also significantly increases the risk of metal debris, necessitating prompt downtime for inspection and maintenance. However, existing gearboxes generally lack detection and warning mechanisms, making it impossible to promptly detect the presence of large metal debris in the lubricant, posing a safety hazard. Therefore, we propose a gearbox for a twin-screw extruder. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the gearboxes in the prior art generally do not have corresponding detection and warning mechanisms, and are unable to promptly detect the presence of large-sized metal debris in the lubricating oil, posing certain safety hazards.

[0007] To solve the above problems, the present invention provides a gearbox for a twin-screw extruder, comprising a gearbox body and a filter and chip detection mechanism. The filter and chip detection mechanism comprises a circulation pump, wherein the suction end and the output end of the circulation pump are respectively connected to the interior of the gearbox body through a filter detection component and a return line.

[0008] The filter inspection component includes a suction pipe connected to the suction end of the circulation pump and an oil outlet pipe connected to the inside of the gear box body. A filter inspection component is provided between the suction pipe and the oil outlet pipe. The filter inspection component includes a detection cylinder with two ends respectively connected to the suction pipe and the oil outlet pipe. A detection filter is fixedly installed in the detection cylinder. The aperture of the detection filter is 50-100μm. A pressure inspection iron plate is provided above the detection filter to be slidably sealed with the detection cylinder. An oil hole is provided in the middle of the pressure inspection iron plate. A The matching hole-patching joint pressure block has elastic ropes fixedly connected between the pressure-detection iron plate and the top inner wall of the detection cylinder, and between the hole-patching joint pressure block and the top inner wall of the detection cylinder. A pair of linkage clamping blocks are fixedly installed on the inner side of the oil hole. The top of the linkage clamping block is flush with the top of the pressure-detection iron plate. The sum of the thickness of the linkage clamping block and the hole-patching joint pressure block is equal to the thickness of the pressure-detection iron plate. A distance sensor is provided above the pressure-detection iron plate, a detection electromagnet is provided below the detection filter, and an outflow solenoid valve is provided on the oil outlet pipe.

[0009] The circulating filter and debris detection mechanism also includes a circulating inspection, control and analysis system, which includes a detection control module, a detection and analysis module, and a bell alarm module. The detection control module is signal-connected to the circulation pump, distance sensor, detection electromagnet, and outflow solenoid valve. The distance sensor is signal-connected to the detection and analysis module, and the detection and analysis module is signal-connected to the bell alarm module.

[0010] In the gearbox for the twin-screw extruder, the filter chip detection mechanism can automatically detect whether the lubricating oil contains large metal chips, and can issue an alarm when large metal chips are detected in the lubricating oil.

[0011] As a further improvement of the present application, the detection cylinder is filled with lubricating oil, an oil drain hole is provided on the pressure inspection iron plate, a fine filter screen matching it is fixedly installed in the oil drain hole, a sealing block is provided above the fine filter screen, which is slidingly sealed with the oil drain hole, a pair of elastic pull ropes are fixedly connected between the sealing block and the fine filter screen, the bottom end of the fine filter screen is flush with the bottom end of the pressure inspection iron plate, and the aperture of the fine filter screen is smaller than the aperture of the detection filter screen.

[0012] As a further improvement of the present application, the top of the fine filter is fixedly connected to an anti-deflection rod, which passes through the sealing block and is slidingly sealed therewith. The top of the sealing block is flush with the top of the pressure inspection iron plate. The outer wall of the anti-deflection rod is provided with a resistance sleeve that is slidingly connected to it. The top of the resistance sleeve is fixedly connected to the sealing block, and the bottom end of the resistance sleeve is against the fine filter.

[0013] As a further improvement of the present application, a filter hole is provided on the outer wall of the detection cylinder, and the filter hole is located between the pressure inspection iron plate and the detection filter screen. A sealing plug plate movably sealed and connected thereto is provided at the filter hole. A sealing sleeve is provided on the outer wall of the detection cylinder and is slidingly and sealingly connected thereto. The filter hole is located on the inner side of the sealing sleeve. A guide rod is fixedly connected to the top of the detection filter screen, and the guide rod passes through the hole-patching joint pressure block and is slidingly and sealingly connected thereto. The guide rod can play a guiding role to prevent the hole-patching joint pressure block from deviating from the oil hole.

[0014] As another improvement of the present application, the return pipeline includes a guide pipe connected to the output end of the circulation pump and a return oil pipe connected to the inside of the gear box body. A chip removal assembly is arranged between the guide pipe and the return oil pipe. The chip removal assembly includes a chip removal cylinder. A chip removal carrier column is provided in the chip removal cylinder and is connected to the chip removal cylinder in a sliding and sealing manner. A chip removal electromagnet in the shape of a circular tube is embedded through the chip removal carrier column. The circulation inspection and analysis system also includes a chip removal control module.

[0015] As another improvement supplement to the present application, the detection control module is connected to the chip removal control module signal, the chip removal control module is connected to the chip removal electromagnet signal, the end of the guide pipe away from the circulation pump passes through the bottom outer wall of the chip removal barrel and is connected to the inner side of the chip removal electromagnet, the end of the return oil pipe away from the gear box body passes through the top outer wall of the chip removal barrel and is connected to the inner side of the chip removal electromagnet, a reflux solenoid valve is provided on the return oil pipe, and the detection control module is connected to the reflux solenoid valve signal.

[0016] As another improvement supplement to the present application, the end of the chip removal barrel away from the circulation pump is set to an open shape, and a horizontal electric push rod is fixedly installed on the outer wall of the chip removal barrel. A connecting rod is fixedly connected between the output end of the horizontal electric push rod and the chip removal carrier column. The circulation detection and control system also includes a chip cleaning control module. The detection control module is signal-connected to the chip cleaning control module, and the chip cleaning control module is signal-connected to the chip removal electromagnet and the horizontal electric push rod.

[0017] As another improvement supplement to the present application, an air pump is provided above the chip removal barrel, the output end of the air pump is connected to an air duct, the end of the air duct away from the air pump is connected to the interior of the chip removal barrel, and the chip cleaning control module is connected to the air pump signal.

[0018] As another improvement supplement to the present application, the bottom end of the chip removal barrel is connected to a chip guide tube, which is located directly below the air guide tube. A chip receiving tube is threadedly connected to the outer wall of the chip guide tube, and a chip receiving filter is fixedly installed in the chip receiving tube.

[0019] As another improvement supplement to the present application, the bottom end of the chip removal cylinder is also connected to an oil guide pipe, which is located on the side of the chip guide pipe close to the chip removal column. The bottom end of the oil guide pipe is connected to a temporary storage cylinder, in which a vertical electric push rod is fixedly installed. The output end of the vertical electric push rod is fixedly connected to a piston plate that is slidingly sealed with the temporary storage cylinder, and the chip cleaning control module is connected to the vertical electric push rod signal.

[0020] To sum up, the present application sets up a circulating filter and chip detection mechanism, so that the circulating filter and chip detection mechanism can automatically and regularly detect the lubricating oil in the gear box to detect whether there are large metal debris in the lubricating oil, and can issue an alarm when large metal debris is detected in the lubricating oil, thereby prompting relevant technical personnel to shut down the gear box for inspection and maintenance in time, greatly improving the safety of the gear box; through the setting of the chip removal component, when the lubricating oil is tested, the iron chips in the lubricating oil can also be effectively removed, thereby effectively improving the oil quality of the lubricating oil, and further improving the operating safety and stability of the gear box. Through the joint setting of the air pump, air guide pipe, chip guide pipe, etc., and after the detection is completed, the iron chips adsorbed on the inner wall of the chip removal electromagnet can be automatically cleaned. On the one hand, it can prevent the iron chips from falling back into the lubricating oil, and on the other hand, it is conducive to ensuring the subsequent iron chip removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application;

[0022] Figure 2 This is a schematic cross-sectional view of the detection tube in the first embodiment of the present application;

[0023] Figure 3 For this application Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 This is a structural block diagram of the cycle inspection, control and analysis system in the first embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present application;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the chip removal assembly in the second embodiment of the present application;

[0027] Figure 7 This is a schematic cross-sectional view of the chip removal barrel in the second embodiment of the present application;

[0028] Figure 8 This is a schematic cross-sectional view of the chip receiving pipe in the second embodiment of the present application;

[0029] Figure 9 This is a schematic cross-sectional view of the temporary storage cylinder in the second embodiment of the present application;

[0030] Figure 10 This is a structural block diagram of the monitoring and analysis system in the second embodiment of the present application.

[0031] Description of the numbers in the figure:

[0032] 101. Gearbox body; 102. Circulation pump; 201. Suction pipe; 202. Oil outlet pipe; 301. Detection cylinder; 302. Detection filter; 303. Pressure detection iron plate; 304. Oil hole; 305. Hole-filling joint pressure block; 306. Elastic lifting rope; 307. Linkage block; 308. Distance sensor; 309. Detection electromagnet; 310. Sealing plug plate; 311. Sealing sleeve; 312. Guide rod; 313. Oil drain hole; 314. Fine filter; 3 15. Sealing block; 316. Elastic pull rope; 317. Anti-deflection rod; 401. Guide pipe; 402. Oil return pipe; 501. Chip removal cylinder; 502. Chip removal column; 503. Chip removal electromagnet; 504. Horizontal electric push rod; 505. Connecting rod; 506. Air pump; 507. Air guide pipe; 508. Chip guide pipe; 509. Chip receiving pipe; 510. Chip receiving filter; 511. Oil guide pipe; 512. Temporary storage cylinder; 513. Vertical electric push rod; 514. Piston plate. DETAILED DESCRIPTION

[0033] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0034] The first implementation method:

[0035] Figures 1-4 A gearbox for a twin-screw extruder is shown, comprising a gearbox body 101 and a filter and chip detection mechanism. The filter and chip detection mechanism includes a circulation pump 102. The suction and discharge ends of the circulation pump 102 are connected to the interior of the gearbox body 101 via a filter detection assembly and a return line (in this embodiment, the return line is a pipe with its ends connected to the interior of the gearbox body 101 and the output end of the suction pipe 201, respectively).

[0036] The filter inspection component includes a suction pipe 201 connected to the suction end of the circulation pump 102, an oil outlet pipe 202 connected to the inside of the gear box body 101, a filter inspection component is provided between the suction pipe 201 and the oil outlet pipe 202, and the filter inspection component includes a detection cylinder 301 whose two ends are respectively connected to the suction pipe 201 and the oil outlet pipe 202, a detection filter 302 is fixedly installed in the detection cylinder 301, and the aperture of the detection filter 302 is 50-100μm (the aperture size of the detection filter 302 can be reasonably determined according to actual conditions), and a pressure inspection iron plate 303 is provided above the detection filter 302, which is slidably sealed with the detection cylinder 301, and an oil hole 304 is provided in the middle of the pressure inspection iron plate 303 , a matching hole-filling joint pressure block 305 is provided just below the oil hole 304, and an elastic suspension rope 306 is fixedly connected between the pressure-detection iron plate 303 and the top inner wall of the detection cylinder 301, and between the hole-filling joint pressure block 305 and the top inner wall of the detection cylinder 301. A pair of linkage clamping blocks 307 are fixedly installed on the inner side of the oil hole 304, and the top of the linkage clamping block 307 is flush with the top of the pressure-detection iron plate 303. The sum of the thickness of the linkage clamping block 307 and the hole-filling joint pressure block 305 is equal to the thickness of the pressure-detection iron plate 303. A distance sensor 308 is provided above the pressure-detection iron plate 303, a detection electromagnet 309 is provided below the detection filter 302, and an outflow solenoid valve is provided on the oil outlet pipe 202;

[0037] The circulating filter and debris detection mechanism also includes a circulating detection, control and analysis system, which includes a detection control module, a detection and analysis module, and a bell alarm module. The detection control module is signal-connected to the circulation pump 102, the distance sensor 308, the detection electromagnet 309, and the outflow solenoid valve. The distance sensor 308 is signal-connected to the detection and analysis module, and the detection and analysis module is signal-connected to the bell alarm module.

[0038] The detection control module is preset with a detection cycle and a cycle duration. The detection control module will regularly perform detection operations according to the detection cycle. During the detection, the detection control module will open the outflow solenoid valve and start the circulation pump 102. After the circulation pump 102 is started, it will continuously extract lubricating oil from the gear box body 101 through the oil suction pipe, and at the same time return the lubricating oil to the gear box body 101 through the return pipe. When the lubricating oil flows through the detection filter 302, the detection filter 302 will filter the lubricating oil. If the lubricating oil contains large metal debris (normal, large Smaller metal debris will pass through the detection filter 302 and will be filtered out by the detection filter 302. When the running time of the circulation pump 102 reaches the circulation time, the detection control module will turn off the circulation pump 102 and the outflow solenoid valve. Subsequently, the detection control module will start the distance sensor 308 and control the detection electromagnet 309 to be energized. After the distance sensor 308 is started, it will continuously detect the distance between it and the pressure detection iron plate 303. The distance data detected by the distance sensor 308 will be transmitted to the detection analysis module in real time for analysis and judgment by the detection analysis module.

[0039] After the detection electromagnet 309 is energized, the pressure detection iron plate 303 will move downward under the action of magnetic attraction. When the pressure detection iron plate 303 moves to the hole-filling joint pressure block 305, the hole-filling joint pressure block 305 will be inserted into the oil hole 304. Then, under the action of the linkage block 307, the hole-filling joint pressure block 305 will move downward with the pressure detection iron plate 303. By setting the thickness of the pressure detection iron plate 303, the hole-filling joint pressure block 305 and the linkage block 307, the oil hole 304 will be filled with oil. After the hole-filling joint pressure block 305 is inserted into the oil hole 304, the bottom end of the hole-filling joint pressure block 305 will be flush with the bottom end of the pressure detection iron plate 303. At this time, the pressure detection iron plate 303 and the bottom end of the hole-filling joint pressure block 305 can form a complete plane that matches the detection filter 302. When the pressure detection iron plate 303 moves downward to fit the detection filter 302, the distance between the distance sensor 308 and the pressure detection iron plate 303 is L (L is a known and The fixed value is L, and the detection and analysis module is pre-inputted). If there is no metal debris on the detection filter 302, the pressure detection iron plate 303 and the hole-filling joint pressure block 305 will move to fit with the detection filter 302. Finally, the distance data detected by the pressure detection iron plate 303 will be the same as L. On the contrary, if there is metal debris on the detection filter 302, the pressure detection iron plate 303 and the hole-filling joint pressure block 305 cannot move to fit with the detection filter 302, but will be stuck above the detection filter 302 after moving to contact with the metal debris. Finally, the distance data detected by the pressure detection iron plate 303 will be less than L. Therefore, the detection and analysis module can determine whether the detection filter 302 has filtered out large metal debris by analyzing the distance data detected by the distance sensor 308. After determining the result, the detection control module will turn off the distance sensor 308 and control the detection electromagnet 309 to cut off the power.

[0040] When the judgment result is that the detection filter 302 has filtered out large-sized metal debris, it means that the lubricating oil contains large-sized metal debris. At this time, the detection and analysis module will control the ringing alarm module to sound an alarm to warn; therefore, through the setting of the circulating filter and chip detection mechanism, the circulating filter and chip detection mechanism can automatically detect the lubricating oil in the gear box on a regular basis to detect whether there are large-sized metal debris in the lubricating oil, and can issue an alarm when large-sized metal debris is detected in the lubricating oil, thereby prompting relevant technical personnel to shut down the gear box for inspection and maintenance in a timely manner, greatly improving the safety of the gear box.

[0041] The detection cylinder 301 is filled with lubricating oil to prevent the detection from causing a reduction in the amount of lubricating oil in the gear box body 101, thereby preventing the oil level in the gear box body 101 from being too low due to the detection. An oil drain hole 313 is provided on the pressure detection iron plate 303, and a fine filter 314 matching it is fixedly installed in the oil drain hole 313. A sealing block 315 is provided above the fine filter 314 and is slidably sealed with the oil drain hole 313. A pair of elastic pull ropes 316 are fixedly connected between the sealing block 315 and the fine filter 314. The bottom end of the fine filter 314 is fixedly connected to the pressure detection iron plate 303. The bottom ends are flush, and the aperture of the fine filter 314 is smaller than that of the detection filter 302. Since there is lubricating oil in the detection cylinder 301, when the pressure detection iron plate 303 and the hole-repairing joint pressure block 305 move downward together, they will squeeze the lubricating oil underneath them. At this time, the lubricating oil will squeeze the sealing block 315, causing the sealing block 315 to move upward. In this way, the lubricating oil can flow through the oil drain hole 313 to the top of the pressure detection iron plate 303 and the hole-repairing joint pressure block 305, so that the pressure detection iron plate 303 and the hole-repairing joint pressure block 305 can move downward smoothly, thereby avoiding affecting the accuracy of the detection.

[0042] The top of the fine filter 314 is fixedly connected to an anti-deflection rod 317, which passes through the sealing block 315 and is slidably sealed therewith. The anti-deflection rod 317 can play a guiding role to prevent the sealing block 315 from deviating from the oil drain hole 313. The top of the sealing block 315 is flush with the top of the pressure inspection iron plate 303. The outer wall of the anti-deflection rod 317 is provided with a sleeve that is slidably connected thereto. The top of the sleeve is fixedly connected to the sealing block 315, and the bottom end of the sleeve is against the fine filter 314. The sleeve can limit the downward movement of the sealing block 315.

[0043] A filter hole is provided on the outer wall of the detection cylinder 301, and the filter hole is located between the pressure detection iron plate 303 and the detection filter 302. A sealing plug plate 310 is provided at the filter hole, which is movably and sealedly connected thereto. A sealing sleeve 311 is provided on the outer wall of the detection cylinder 301, which is slidably and sealedly connected thereto. The filter hole is located on the inner side of the sealing sleeve 311. When large metal debris is detected in the lubricating oil, relevant technicians can clean the large metal debris filtered out on the detection filter 302 when inspecting and maintaining the gear box. During cleaning, first slide the sealing sleeve 311 to expose the sealing plug plate 310, then remove the sealing plug plate 310, and then remove the metal debris on the detection filter 302 through the filter hole, so that the metal debris filtered out of the detection filter 302 is easy to clean, which is beneficial to subsequent detection. The top of the detection filter 302 is fixedly connected with a guide rod 312, which passes through the hole-patching joint pressure block 305 and is slidably and sealedly connected to it. The guide rod 312 can play a guiding role to prevent the hole-patching joint pressure block 305 from deviating from the oil hole 304.

[0044] The second implementation method:

[0045] Figure 5-10 A gearbox for a twin-screw extruder is shown. Different from the first embodiment, the return line includes a guide pipe 401 connected to the output end of the circulation pump 102 and an oil return pipe 402 connected to the interior of the gearbox body 101. A chip removal component is provided between the guide pipe 401 and the oil return pipe 402. The chip removal component includes a chip removal barrel 501. A chip removal column 502 is provided in the chip removal barrel 501 and is connected to the chip removal barrel in a sliding and sealing manner. A chip removal electromagnet 503 in the shape of a circular tube is embedded in the chip removal column 502. The circulation inspection and control system also It includes a chip removal control module, a detection control module signal-connected to the chip removal control module, a chip removal control module signal-connected to the chip removal electromagnet 503, an end of the guide pipe 401 away from the circulation pump 102 passes through the bottom outer wall of the chip removal cylinder 501 and is connected to the inner side of the chip removal electromagnet 503, an end of the return oil pipe 402 away from the gear box body 101 passes through the top outer wall of the chip removal cylinder 501 and is connected to the inner side of the chip removal electromagnet 503, a reflux solenoid valve is provided on the return oil pipe 402, and the detection control module is signal-connected to the reflux solenoid valve.

[0046] During detection, when the detection control module opens the outflow solenoid valve, it will also open the return solenoid valve at the same time, and when the detection control module closes the outflow solenoid valve, it will also close the return solenoid valve at the same time. Metal debris is usually mainly iron chips (mainly from steel parts, such as gears, bearings, etc.). In this embodiment, before starting the detection, the detection control module will send a signal to the chip removal control module so that during the detection, the chip removal control module will control the chip removal electromagnet 503 to be energized. During the detection process, the lubricating oil will flow back to the gear box body 101 through the guide pipe 401, the chip removal electromagnet 503, and the return oil pipe 402. When the lubricating oil flows through the chip removal electromagnet 503, the iron chips in the lubricating oil will be adsorbed on the inner wall of the chip removal electromagnet 503. Therefore, through the setting of the chip removal component, when the lubricating oil is detected, the iron chips in the lubricating oil can also be effectively removed, thereby effectively improving the oil quality of the lubricating oil, and further improving the operating safety and stability of the gear box.

[0047] The end of the chip removal barrel 501 away from the circulation pump 102 is set to an open shape, and a horizontal electric push rod 504 is fixedly installed on the outer wall of the chip removal barrel 501. A connecting rod 505 is fixedly connected between the output end of the horizontal electric push rod 504 and the chip removal column 502. The circulation detection and control system also includes a chip cleaning control module, the detection control module is connected to the chip cleaning control module by signal, and the chip cleaning control module is connected to the chip removal electromagnet 503 and the horizontal electric push rod 504 by signal. The chip removal barrel 501 is set above There is an air pump 506, and the output end of the air pump 506 is connected to an air guide pipe 507. The end of the air guide pipe 507 away from the air pump 506 is connected to the interior of the chip removal barrel 501. The chip cleaning control module is connected to the air pump 506 signal. The bottom end of the chip removal barrel 501 is connected to a chip guide pipe 508. The chip guide pipe 508 is located directly below the air guide pipe 507. The outer wall of the chip guide pipe 508 is provided with a chip receiving pipe 509 threadedly connected to it, and a chip receiving filter 510 is fixedly installed in the chip receiving pipe 509.

[0048] After the detection is completed, the detection control module will send a signal to the chip cleaning control module. After receiving the signal, the chip cleaning control module will control the horizontal electric push rod 504 to push the chip removal column 502, so that the chip removal column 502 moves in the direction close to the air guide pipe 507 until the chip removal electromagnet 503 moves to the air guide pipe 507 and the chip guide pipe 508, so that the upper and lower ends of the chip removal electromagnet 503 are connected to the air guide pipe 507 and the chip guide pipe 508 respectively. Then, the chip removal electromagnet 503 will control the chip removal electromagnet 503 to cut off the power and start the air pump 506. After the air pump 506 is started, the inner wall of the chip removal electromagnet 503 can be The iron chips adsorbed on the chip collecting tube 509 are blown down, and the chip filter 510 intercepts the iron chips to prevent them from scattering everywhere. After a certain period of time, the chip cleaning control module turns off the air pump 506 and controls the horizontal electric push rod 504 to pull the chip removal column 502 to reset the chip removal column 502. Therefore, through the joint setting of the air pump 506, the air guide tube 507, the chip guide tube 508, etc., after the detection is completed, the iron chips adsorbed on the inner wall of the chip removal electromagnet 503 can be automatically cleaned. On the one hand, it can prevent the iron chips from falling back into the lubricating oil. On the other hand, it is conducive to ensuring the subsequent iron chip removal effect.

[0049] The bottom end of the chip removal cylinder 501 is also connected to an oil guide pipe 511, which is located on the side of the chip guide pipe 508 close to the chip removal column 502. The bottom end of the oil guide pipe 511 is connected to a temporary storage cylinder 512, and a vertical electric push rod 513 is fixedly installed in the temporary storage cylinder 512. The output end of the vertical electric push rod 513 is fixedly connected to a piston plate 514 which is slidingly sealed with the temporary storage cylinder 512. The chip cleaning control module is connected to the vertical electric push rod 513 by signal. The chip cleaning control module controls the horizontal electric push rod 504 to push the chip removal column 502 so that the chip removal column 502 moves toward the direction close to the air guide pipe 507. When the chip removal electromagnet 503 moves to the oil guide pipe 511, the chip cleaning control module will control the horizontal electric push rod 504 to stop pushing the chip removal column 502, and the chip cleaning control module will control the vertical electric push rod 513 to pull the piston plate 514 downward, so that the chip removal electromagnet 503 can be The lubricating oil is discharged into the temporary storage cylinder 512 to prevent the lubricating oil from leaking when cleaning the iron chips. Subsequently, the chip cleaning control module will continue to control the horizontal electric push rod 504 to push the chip removal column 502 until the chip removal electromagnet 503 moves to the air guide pipe 507 and the chip guide pipe 508. In addition, after the iron chips are cleaned, the chip cleaning control module controls the horizontal electric push rod 504 to pull the chip removal column 502 to reset. When the chip removal electromagnet 503 moves to the oil guide pipe 511, the chip cleaning control module will also control the horizontal electric push rod 504 to stop pulling the chip removal column 502, and control the vertical electric push rod 513 to push the piston plate 514 upward to allow the lubricating oil to flow back to the inside of the chip removal electromagnet 503. Therefore, through the combined setting of the oil guide pipe 511, the temporary storage cylinder 512, the vertical electric push rod 513, etc., the lubricating oil can be effectively prevented from leaking when cleaning the iron chips adsorbed on the inner wall of the chip removal electromagnet 503.

[0050] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A gearbox for a twin-screw extruder, comprising a gearbox body (101), characterized in that: The invention also includes a circulating filter and chip detection mechanism, the circulating filter and chip detection mechanism including a circulating pump (102), the suction end and the output end of the circulating pump (102) being connected to the interior of the gear box body (101) via a filter detection component and a return line, respectively, the filter detection component including a suction pipe (201) connected to the suction end of the circulating pump (102) and an oil outlet pipe (202) connected to the interior of the gear box body (101); A filter detection assembly is provided between the suction guide tube (201) and the oil outlet pipe (202), and the filter detection assembly comprises a detection cylinder (301) whose two ends are respectively connected to the suction guide tube (201) and the oil outlet pipe (202). A detection filter (302) is fixedly installed in the detection cylinder (301), and the pore size of the detection filter (302) is 50-100 μm. A sliding sealing connection with the detection cylinder (301) is provided above the detection filter (302). The pressure detection iron plate (303) is provided with an oil hole (304) in the middle of the pressure detection iron plate (303). A matching hole-filling joint pressure block (305) is provided just below the oil hole (304). An elastic hanging rope (306) is fixedly connected between the pressure detection iron plate (303) and the top inner wall of the detection cylinder (301), and between the hole-filling joint pressure block (305) and the top inner wall of the detection cylinder (301). The inner side of the oil hole (304) is provided with a hole-filling joint pressure block (305). A pair of linkage blocks (307) are fixedly installed, the top of the linkage block (307) is flush with the top of the pressure detection iron plate (303), the sum of the thickness of the linkage block (307) and the hole-filling joint pressure block (305) is equal to the thickness of the pressure detection iron plate (303), a distance sensor (308) is provided above the pressure detection iron plate (303), a detection electromagnet (309) is provided below the detection filter (302), an outflow electromagnetic valve is provided on the oil outlet pipe (202), the circulating filter and chip detection mechanism further includes a circulation detection control and analysis system, the circulation detection control and analysis system includes a detection control module, a detection analysis module, and a bell alarm module, the detection control module is signal-connected to the circulation pump (102), the distance sensor (308), the detection electromagnet (309), and the outflow electromagnetic valve, the distance sensor (308) is signal-connected to the detection analysis module, and the detection analysis module is signal-connected to the bell alarm module; The detection cylinder (301) is filled with lubricating oil. The pressure detection iron plate (303) is provided with an oil drain hole (313). A matching fine filter (314) is fixedly installed in the oil drain hole (313). A sealing block (315) is provided above the fine filter (314) and is slidably sealed with the oil drain hole (313). A pair of elastic drawstrings (316) are fixedly connected between the sealing block (315) and the fine filter (314). The bottom end of the fine filter (314) is flush with the bottom end of the pressure detection iron plate (303), and the aperture of the fine filter (314) is smaller than the aperture of the detection filter (302).

2. A twin-screw extruder gearbox according to claim 1, characterized in that: The top end of the fine filter (314) is fixedly connected to an anti-deflection rod (317). The anti-deflection rod (317) passes through the sealing block (315) and is slidably and sealingly connected thereto. The top end of the sealing block (315) is flush with the top end of the pressure inspection iron plate (303). An abutment sleeve is sleeved on the outer wall of the anti-deflection rod (317) and is slidably connected thereto. The top end of the abutment sleeve is fixedly connected to the sealing block (315), and the bottom end of the abutment sleeve abuts against the fine filter (314).

3. A twin-screw extruder gearbox according to claim 1, characterized in that: A filter hole is provided on the outer wall of the detection cylinder (301), and the filter hole is located between the pressure detection iron plate (303) and the detection filter screen (302). A sealing plug plate (310) movably and sealingly connected to the filter hole is provided at the filter hole. A sealing sleeve (311) is sleeved on the outer wall of the detection cylinder (301) and is slidably and sealingly connected to the filter hole. The filter hole is located on the inner side of the sealing sleeve (311). A guide rod (312) is fixedly connected to the top end of the detection filter screen (302), and the guide rod (312) passes through the hole-filling joint pressure block (305) and is slidably and sealingly connected to the hole-filling joint pressure block (305).

4. A twin-screw extruder gearbox according to claim 1, characterized in that: The return line comprises a guide pipe (401) connected to the output end of the circulation pump (102) and an oil return pipe (402) connected to the interior of the gearbox body (101). A chip removal assembly is provided between the guide pipe (401) and the oil return pipe (402). The chip removal assembly comprises a chip removal cylinder (501). A chip removal column (502) is provided in the chip removal cylinder (501) and is slidably and sealingly connected thereto. A chip removal electromagnet (503) in the shape of a circular tube is embedded through the chip removal column (502). The circulation inspection and control analysis system further comprises a chip removal control module.

5. A twin-screw extruder gearbox according to claim 4, characterized in that: The detection control module is signal-connected to the chip removal control module, which is signal-connected to the chip removal electromagnet (503). One end of the guide pipe (401) away from the circulation pump (102) passes through the outer wall of the bottom end of the chip removal barrel (501) and is connected to the inner side of the chip removal electromagnet (503). One end of the oil return pipe (402) away from the gear box body (101) passes through the outer wall of the top end of the chip removal barrel (501) and is connected to the inner side of the chip removal electromagnet (503). A reflux electromagnetic valve is provided on the oil return pipe (402), and the detection control module is signal-connected to the reflux electromagnetic valve.

6. A gearbox for a twin-screw extruder according to claim 5, characterized in that: One end of the chip removal barrel (501) away from the circulation pump (102) is set to be open, and a horizontal electric push rod (504) is fixedly installed on the outer wall of the chip removal barrel (501), and a connecting rod (505) is fixedly connected between the output end of the horizontal electric push rod (504) and the chip removal column (502). The circulation detection and control system also includes a chip cleaning control module, the detection control module is signal-connected to the chip cleaning control module, and the chip cleaning control module is signal-connected to the chip removal electromagnet (503) and the horizontal electric push rod (504).

7. A twin-screw extruder gearbox according to claim 6, characterized in that: An air pump (506) is provided above the chip removal barrel (501), an output end of the air pump (506) is connected to an air guide tube (507), an end of the air guide tube (507) away from the air pump (506) is connected to the interior of the chip removal barrel (501), and the chip cleaning control module is signal-connected to the air pump (506).

8. A twin-screw extruder gearbox according to claim 7, characterized in that: The bottom end of the chip removal cylinder (501) is connected to a chip guide tube (508), and the chip guide tube (508) is located directly below the air guide tube (507). A chip receiving tube (509) threadedly connected to the chip guide tube (508) is sleeved on the outer wall of the chip guide tube (508), and a chip receiving filter (510) is fixedly installed in the chip receiving tube (509).

9. The gear box for a twin-screw extruder according to claim 8, characterized in that: The bottom end of the chip removal barrel (501) is also connected to an oil guide pipe (511), and the oil guide pipe (511) is located on a side of the chip guide pipe (508) close to the chip removal column (502). The bottom end of the oil guide pipe (511) is connected to a temporary storage barrel (512), and a vertical electric push rod (513) is fixedly installed in the temporary storage barrel (512). The output end of the vertical electric push rod (513) is fixedly connected to a piston plate (514) that is slidably and sealingly connected to the temporary storage barrel (512). The chip cleaning control module is signal-connected to the vertical electric push rod (513).

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