Permanent magnet frequency conversion screw air compressor

Abstract

The invention discloses a permanent magnet frequency conversion screw air compressor, and relates to the technical field of air compressor alarm devices, the permanent magnet frequency conversion screw air compressor comprises an alarm device arranged on an air compressor body, and the air compressor body comprises a rack, a machine head, a driving motor, an air inlet module, an oil-gas separator, a cooler and an air storage tank. According to the permanent magnet frequency conversion screw air compressor, lubricating oil obtained after oil-gas separation can be conveniently collected and detected at regular time, when the liquid level of the lubricating oil in the storage chamber is high, it is indicated that the air inlet module is abnormal, so that the air inlet amount is reduced, or the liquid level of the lubricating oil in the machine head is too high, and at the moment, an alarm is given through the alarm to remind a worker of overhauling; when the liquid level of the lubricating oil in the storage chamber is lower, the lubricating oil in the machine head is less, and at the moment, the lubricating oil can be quantitatively added into the machine head; according to the air compressor, the abrasion condition in the machine head can be conveniently detected, and when abrasion is serious, an alarm is given through the alarm to remind a worker of overhauling, so that the using effect and the service life of the air compressor body are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor alarm devices, in particular to a permanent magnet variable frequency screw air compressor. Background Art

[0002] Permanent magnet variable frequency screw air compressor is a kind of high-efficiency and energy-saving air compression equipment. Its core feature is that it adopts permanent magnet synchronous motor and frequency converter technology, which can automatically adjust the speed according to the actual gas demand and realize accurate gas supply. It is mainly composed of frame, head, drive motor, air intake module, oil-gas separator, cooler and air storage tank. When in use, air enters the head through the air intake module for compression, and the compressed air enters the oil-gas separator for oil-gas separation. The separated air and lubricating oil enter the cooler for cooling respectively, and the cooled compressed air enters the air storage tank for storage, and the cooled lubricating oil returns to the head for continued use.

[0003] However, when the existing permanent magnet variable frequency screw air compressor is in use, when the lubricating oil level in the machine head is high or the air intake volume of the air intake module is small due to blockage or other reasons, more lubricating oil will be discharged along with the compressed air, which is not easy to be discovered and alarmed in time, affecting the use effect and life of the air compressor. At the same time, when the lubricating oil in the machine head is less, it is not easy to be discovered and added in time, which will also affect the use effect and life of the air compressor. Moreover, when the machine head is abnormally worn, metal debris will be generated. At this time, it is also not easy to be discovered and alarmed in time, affecting the use effect and life of the air compressor.

[0004] To this end, we propose a permanent magnet variable frequency screw air compressor. Summary of the invention

[0005] The object of the present invention is to provide a permanent magnet variable frequency screw air compressor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a permanent magnet variable frequency screw air compressor, comprising an alarm device arranged on an air compressor body, the air compressor body comprising a frame, a head, a drive motor, an air intake module, an oil-gas separator, a cooler and an air storage tank, the alarm device comprising an alarm fixedly connected to the top of the frame, and a first connecting pipe is fixedly connected to the bottom of the oil-gas separator, the lower end of the first connecting pipe is fixedly connected to a working box, and the bottom of the working box is fixedly connected to a second connecting pipe, the other end of the second connecting pipe is fixedly connected to a pump body, and a third connecting pipe is fixedly connected between the pump body and the cooler, and a conveyor belt arranged in an annular manner is connected in the working box through a conveying mechanism, and the conveyor belt The side wall is fixedly connected to two annular ribs, a plurality of baffles are fixedly connected between the two ribs, and a storage chamber is formed between two adjacent baffles, a liquid level sensor is fixedly connected to the top of the working box, and the liquid level sensor is electrically connected to the alarm, a U-shaped magnet is inserted in the conveyor belt, and the magnet is fixed to the inner wall of the working box, a weighing plate is fixedly connected to the inner wall of the working box, and the weighing plate is located below the conveyor belt, a weighing sensor is fixedly connected to the bottom of the weighing plate, and the weighing sensor is electrically connected to the alarm, a collecting mechanism for collecting metal debris is provided in the working box, and an oil replenishing mechanism for automatically replenishing oil into the interior is provided on the top of the machine head.

[0007] Preferably, the conveying mechanism includes two symmetrically arranged rotating rods rotatably connected in the working box, and the side wall of each rotating rod is fixedly sleeved with two symmetrically arranged conveying rollers, the conveyor belt is sleeved on the side wall of the conveying roller, the outer side wall of the working box is fixedly connected with a motor, and the output end of the motor is fixed to one end of the rotating rod.

[0008] Preferably, the collecting mechanism includes a collecting box inserted in the working box, and a handle is fixedly connected to the side wall of the collecting box, a partition is fixedly connected to the bottom of the working box, a scraping mechanism for scraping metal debris on the top of the weighing plate is provided in the working box, and a shaking mechanism for shaking the conveyor belt is provided in the working box.

[0009] Preferably, the shaking mechanism includes a first movable plate, and the bottom of the first movable plate is fixedly connected to a plurality of rubber rods arranged in an array, the first movable plate is connected to the inner wall of the working box through a first reset mechanism, and the movement of the first movable plate is driven by a pushing mechanism.

[0010] Preferably, the first reset mechanism includes two symmetrically arranged T-shaped guide rods fixedly connected to the top of the first movable plate, and the side walls of the T-shaped guide rods are sleeved with connecting plates, the connecting plates are fixed to the inner side walls of the working box, and the side walls of each T-shaped guide rod are sleeved with a first spring.

[0011] Preferably, the pushing mechanism comprises a pushing plate fixedly connected to the side wall of the first movable plate, and a plurality of conical blocks arranged in an array are fixedly connected to the side wall of one of the rotating rods.

[0012] Preferably, the scraping mechanism includes an L-shaped plate fixedly connected to the outer wall of the working box, and the side wall of the L-shaped plate is fixedly connected to a cylinder, the telescopic end of the cylinder is fixedly connected to a second movable plate, and the second movable plate penetrates into the working box and is fixedly connected to a scraper.

[0013] Preferably, the oil replenishing mechanism includes an oil replenishing pipe fixedly connected to the top of the machine head, and the upper end of the oil replenishing pipe is fixedly connected to a solenoid valve, the upper end of the solenoid valve is fixedly connected to an oil storage tank, and a third movable plate is connected to the oil storage tank through a second reset mechanism, the side wall of the oil storage tank is fixedly connected to a refueling pipe, and a one-way valve is arranged in the refueling pipe.

[0014] Preferably, the second reset mechanism includes two symmetrically arranged moving rods inserted on the top of the oil storage tank, and the lower ends of the moving rods are fixed to the top of the third moving plate, the side walls of each of the moving rods are sleeved with a second spring, and the movement of the third moving plate is detected by a detection component.

[0015] Preferably, the detection assembly includes a mounting block fixedly connected to the upper end of one of the moving rods, a sensing block is fixedly connected to the bottom of the mounting block, and a proximity switch is fixedly connected to the top of the oil storage tank.

[0016] Preferably, the frame is an aluminum alloy profile frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention is provided with an alarm device, etc., when in use, air is filtered by the air intake module and then enters the machine head for compression, the compressed air enters the oil-gas separator for oil-gas separation, the separated air and lubricating oil enter the cooler respectively for cooling, the cooled compressed air enters the air storage tank for storage, and the cooled lubricating oil is circulated to the machine head for continued use, and when the oil and gas are separated, the separated lubricating oil can enter the working box through the first connecting pipe and fall into the storage chamber for temporary storage, the motor is started at a fixed time, the rotation of the motor drives the rotation of the rotating rod and the conveying roller, and then drives the conveying belt for conveying, so that The storage chamber containing temporary lubricating oil can be transported to the bottom of the liquid level sensor, while the empty storage chamber continues to be transported to the bottom of the first connecting pipe, and the lubricating oil is temporarily stored. The liquid level of the lubricating oil in the storage chamber is detected by the liquid level sensor. When the liquid level of the lubricating oil in the storage chamber is high, it means that the air intake module is abnormal, resulting in less air intake, or the lubricating oil level in the machine head is too high. At this time, an alarm is sounded through the alarm to remind the staff to carry out maintenance to ensure the use effect and life of the air compressor body. When the liquid level of the lubricating oil in the storage chamber is low, it means that there is less lubricating oil in the machine head. At this time, an alarm is sounded through the alarm.

[0019] The present invention provides an oil replenishing mechanism, etc., when the liquid level of the lubricating oil in the storage chamber is low, it means that the lubricating oil in the machine head is less. At this time, the solenoid valve is opened, and the third movable plate is pushed downward under the action of the second spring, so that the lubricating oil stored in the oil storage tank can be squeezed and enters the machine head through the oil replenishing pipe, so that the lubricating oil can be quantitatively added to the machine head. Through multiple squeezing, the lubricating oil in the machine head can be ensured to be within the required range, thereby ensuring the use effect and life of the air compressor body.

[0020] The present invention is provided with a collecting mechanism, etc., after the lubricating oil enters the storage chamber, it will be transported forward along the conveyor belt, and under the action of the magnet, the metal debris in the lubricating oil can be adsorbed, so that the metal debris can be adsorbed on the surface of the conveyor belt, and when the storage chamber is rotated to a downward position, the lubricating oil can fall into the bottom of the working box, and by starting the pump body, the lubricating oil in the working box can enter the conveyor belt through the second connecting pipe, the pump body and the third connecting pipe for cooling, while the metal debris continues to be transported forward, and when it moves to the top of the collection box, the metal debris is separated from the magnet and can fall on the top of the weighing plate, and is weighed under the action of the weighing sensor, so that it is convenient to detect the wear condition in the machine head, when the weight of the metal debris is large, it indicates that the wear is serious, and an alarm is sounded through the alarm to remind the staff to carry out maintenance, and after the weighing is completed, the cylinder is started, and the scraper is driven to move through the second moving plate, so that the metal debris on the top of the weighing plate can be scraped into the collection box for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 It is a partial cross-sectional schematic diagram of the oil storage tank in the present invention;

[0024] Figure 4 It is a partial cross-sectional structural schematic diagram of the working box in the present invention;

[0025] Figure 5 It is a partial cross-sectional structural schematic diagram of the working box in the present invention from another viewing angle;

[0026] Figure 6 It is a structural schematic diagram of the conveying mechanism in the present invention;

[0027] Figure 7 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 8 for Figure 3 Enlarged view of point B in the middle;

[0029] Fig. 9 for Figure 3 Enlarged view of point C in the middle;

[0030] Fig.10 for Figure 4 Enlarged view of point D in the middle;

[0031] Fig.11 for Figure 5 Enlarged view of point E in the middle.

[0032] In the figure: 1. air compressor body; 101. frame; 102. head; 103. drive motor; 104. air intake module; 105. oil-gas separator; 106. cooler; 107. gas storage tank; 201. rotating rod; 202. conveying roller; 203. motor; 301. L-shaped plate; 302. cylinder; 303. second movable plate; 304. scraper; 401. collecting box; 402. handle; 501. first movable plate; 502. rubber rod; 601. T-shaped guide rod; 602. connecting plate; 603. first spring; 701. push plate; 702. conical block; 801. oil storage tank; 802. electromagnetic valve; 803, oil supply pipe; 804, oil filling pipe; 805, third movable plate; 901, movable rod; 902, second spring; 1001, proximity switch; 1002, mounting block; 1003, sensing block; 1101, alarm; 1102, first connecting pipe; 1103, working box; 1104, second connecting pipe; 1105, pump body; 1106, third connecting pipe; 1107, conveyor belt; 1108, rib; 1109, baffle; 1110, storage chamber; 1111, liquid level sensor; 1112, magnet; 1113, weighing plate; 1114, weighing sensor; 1115, partition. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 11, a permanent magnet variable frequency screw air compressor shown in the figure includes an alarm device arranged on the air compressor body 1, the air compressor body 1 includes a frame 101, a head 102, a drive motor 103, an air intake module 104, an oil-gas separator 105, a cooler 106 and an air storage tank 107. When in use, air enters the head 102 through the air intake module 104 for compression, the compressed air enters the oil-gas separator 105 for oil-gas separation, the separated air and lubricating oil enter the cooler 106 for cooling respectively, the cooled compressed air enters the air storage tank 107 for storage, and the cooled lubricating oil returns to the head 102 for continued use. The frame 101, the head 102, the drive motor 103, the air intake module 104 , the oil-gas separator 105, the cooler 106 and the gas storage tank 107 are well-known technologies in the technical field, and the structure and principle are not repeated here. The alarm device includes an alarm 1101 fixedly connected to the top of the frame 101, and the bottom of the oil-gas separator 105 is fixedly connected with a first connecting pipe 1102, the lower end of the first connecting pipe 1102 is fixedly connected with a working box 1103, and the bottom of the working box 1103 is fixedly connected with a second connecting pipe 1104, the other end of the second connecting pipe 1104 is fixedly connected with a pump body 1105, and a third connecting pipe 1106 is fixedly connected between the pump body 1105 and the cooler 106, and a ring-shaped conveyor belt 1107 is connected in the working box 1103 through a conveying mechanism, and the conveying The side wall of the conveyor belt 1107 is fixedly connected to two annular ribs 1108, a plurality of baffles 1109 are fixedly connected between the two ribs 1108, and a storage chamber 1110 is formed between two adjacent baffles 1109, a liquid level sensor 1111 is fixedly connected to the top of the working box 1103, and the liquid level sensor 1111 is electrically connected to the alarm 1101, a U-shaped magnet 1112 is inserted into the conveyor belt 1107, and the magnet 1112 is fixed to the inner wall of the working box 1103, a weighing plate 1113 is fixedly connected to the inner wall of the working box 1103, and the weighing plate 1113 is located below the conveyor belt 1107, a weighing sensor 1114 is fixedly connected to the bottom of the weighing plate 1113, and the weighing sensor 1114 is fixedly connected to the bottom of the weighing plate 1113. The heavy sensor 1114 is electrically connected to the alarm 1101. A collecting mechanism for collecting metal scraps is provided in the working box 1103, and an oil replenishing mechanism for automatically replenishing oil into the machine head 102 is provided on the top of the machine head 102, so as to facilitate the regular collection and detection of the lubricating oil after oil-gas separation. When the liquid level of the lubricating oil in the storage chamber 1110 is high, it indicates that the air intake module 104 is abnormal, resulting in a decrease in the air intake volume, or the lubricating oil level in the machine head 102 is too high. At this time, the alarm 1101 is used to warn the staff to carry out maintenance; when the liquid level of the lubricating oil in the storage chamber 1110 is low, it indicates that the lubricating oil in the machine head 102 is less. At this time, the lubricating oil can be quantitatively added to the machine head 102.It is convenient to detect the wear condition inside the machine head 102. When the wear is serious, the alarm 1101 will sound an alarm to remind the staff to carry out maintenance, thereby ensuring the use effect and life of the air compressor body 1. ;

[0035] The conveying mechanism includes two symmetrically arranged rotating rods 201 rotatably connected in the working box 1103, and the side wall of each rotating rod 201 is fixedly sleeved with two symmetrically arranged conveying rollers 202, and the conveying belt 1107 is sleeved on the side wall of the conveying roller 202. The outer wall of the working box 1103 is fixedly connected with a motor 203, and the output end of the motor 203 is fixed to one end of the rotating rod 201. The motor 203 is started at a fixed time, and the rotation of the motor 203 drives the rotation of the rotating rod 201 and the conveying roller 202, thereby driving the conveying belt 1107 for conveying, so that the storage chamber 1110 temporarily storing the lubricating oil can be transported to the bottom of the liquid level sensor 1111, and the empty storage chamber 1110 continues to be transported to the bottom of the first connecting pipe 1102, and the lubricating oil is temporarily stored.

[0036] The collecting mechanism includes a collecting box 401 inserted into the working box 1103, and a handle 402 is fixedly connected to the side wall of the collecting box 401, and a partition 1115 is fixedly connected to the bottom of the working box 1103. A scraping mechanism for scraping metal debris on the top of the weighing plate 1113 is provided in the working box 1103, and a shaking mechanism for shaking the conveyor belt 1107 is provided in the working box 1103. After the lubricating oil enters the storage chamber 1110, it will be transported forward along the conveyor belt 1107. Under the action of the magnet 1112, the metal debris in the lubricating oil can be adsorbed, so that the metal debris can be adsorbed on the surface of the conveyor belt 1107. When the storage chamber 1110 is rotated to a downward position, the lubricating oil can fall into the bottom of the working box 1103. By starting the pump body 1105, the lubricating oil in the working box 1103 can enter the conveyor belt 1107 for cooling through the second connecting pipe 1104, the pump body 1105 and the third connecting pipe 1106, while the metal debris continues to be transported forward. When it moves to the top of the collection box 401, the metal debris is separated from the magnet 1112 and can fall on the top of the weighing plate 1113. It is weighed under the action of the weighing sensor 1114, so as to facilitate the detection of the wear condition in the machine head 102. When the weight of the metal debris is large, it indicates serious wear and tear, and an alarm is sounded through the alarm 1101 to remind the staff to carry out maintenance. After the weighing is completed, the metal debris on the top of the weighing plate 1113 is scraped into the collection box 401 for collection through the scraping mechanism.

[0037] The shaking mechanism includes a first movable plate 501, and a plurality of rubber rods 502 arranged in an array are fixedly connected to the bottom of the first movable plate 501. The first movable plate 501 is connected to the inner wall of the working box 1103 through a first reset mechanism, and the movement of the first movable plate 501 is driven by a pushing mechanism. The first movable plate 501 and the rubber rod 502 are reciprocated by the pushing mechanism and the first reset mechanism, so that the conveyor belt 1107 can be shaken to facilitate the falling off of adhered metal debris. In addition, the vibration amplitude is small, and the conveyor belt 1107 below is shaken, which will not affect the detection of the liquid level in the storage chamber 1110.

[0038] The first reset mechanism includes two symmetrically arranged T-shaped guide rods 601 fixedly connected to the top of the first movable plate 501, and the side walls of the T-shaped guide rods 601 are sleeved with connecting plates 602, and the connecting plates 602 are fixed to the inner wall of the working box 1103, and the side walls of each T-shaped guide rod 601 are sleeved with a first spring 603, which guides and resets the movement of the first movable plate 501.

[0039] The frame 1 is an aluminum alloy frame, which is easy to assemble and disassemble.

[0040] The pushing mechanism includes a pushing plate 701 fixedly connected to the side wall of the first movable plate 501, and a plurality of conical blocks 702 arranged in an array are fixedly connected to the side wall of one of the rotating rods 201. When the rotating rod 201 rotates, the conical blocks 702 are driven to rotate synchronously. When the conical blocks 702 are against the top of the pushing plate 701, the first movable plate 501 and the rubber rod 502 can be pushed downward, and at the same time, the first spring 603 is compressed.

[0041] The scraping mechanism includes an L-shaped plate 301 fixedly connected to the outer wall of the working box 1103, and the side wall of the L-shaped plate 301 is fixedly connected to a cylinder 302, the telescopic end of the cylinder 302 is fixedly connected to a second movable plate 303, and the second movable plate 303 penetrates into the working box 1103 and is fixedly connected to a scraper 304. When the cylinder 302 is started, the scraper 304 is driven to move by the second movable plate 303, so that the metal debris on the top of the weighing plate 1113 can be scraped into the collection box 401 for collection.

[0042] The oil replenishing mechanism includes an oil replenishing pipe 803 fixedly connected to the top of the machine head 102, and the upper end of the oil replenishing pipe 803 is fixedly connected to the solenoid valve 802, the upper end of the solenoid valve 802 is fixedly connected to the oil storage tank 801, and the oil storage tank 801 is connected to the third movable plate 805 through the second reset mechanism, the side wall of the oil storage tank 801 is fixedly connected to the oil filling pipe 804, and the oil filling pipe 804 is provided with a one-way valve, the conduction direction of the one-way valve is from the outside to the oil storage tank 801, when the lubricating oil in the storage chamber 1110 When the liquid level is low, it means that there is less lubricating oil in the machine head 102. At this time, the solenoid valve 802 is opened, and the third movable plate 805 is pushed downward under the action of the second reset mechanism, so that the lubricating oil stored in the oil storage tank 801 can be squeezed and enter the machine head 102 through the oil replenishing pipe 803, so that the lubricating oil can be quantitatively added to the machine head 102. Through multiple squeezing, the lubricating oil in the machine head 102 can be ensured to be within the required range, thereby ensuring the use effect and life of the air compressor body 1.

[0043] The second reset mechanism includes two symmetrically arranged moving rods 901 inserted on the top of the oil storage tank 801, and the lower ends of the moving rods 901 are fixed to the top of the third moving plate 805. The side walls of each moving rod 901 are sleeved with a second spring 902, and the movement of the third moving plate 805 is detected by the detection component, which guides and resets the movement of the third moving plate 805.

[0044] The detection component includes a mounting block 1002 fixedly connected to the upper end of one of the moving rods 901, a sensing block 1003 is fixedly connected to the bottom of the mounting block 1002, and a proximity switch 1001 is fixedly connected to the top of the oil storage tank 801. When the third moving plate 805 moves downward, the mounting block 1002 and the sensing block 1003 are driven downward by the moving rod 901. When the proximity switch 1001 detects the sensing block 1003, it indicates that the lubricating oil in the oil storage tank 801 is less. At this time, the lubricating oil can be added to the oil storage tank 801 through the refueling pipe 804.

[0045] Working principle: When in use, air is filtered through the air intake module 104 and then enters the machine head 102 for compression. The compressed air enters the oil-gas separator 105 for oil-gas separation. The separated air and lubricating oil enter the cooler 106 for cooling respectively. The cooled compressed air enters the air storage tank 107 for storage, while the cooled lubricating oil is circulated to the machine head 102 for continued use. In addition, when the oil and gas are separated, the separated lubricating oil can enter the working box 1103 through the first connecting pipe 1102 and fall into the storage chamber 1110 for temporary storage.

[0046] The motor 203 is started at a fixed time, and the rotation of the motor 203 drives the rotation of the rotating rod 201 and the conveying roller 202, and then drives the conveying belt 1107 for conveying, so that the storage chamber 1110 temporarily storing the lubricating oil can be conveyed to the bottom of the liquid level sensor 1111, and the empty storage chamber 1110 continues to be conveyed to the bottom of the first connecting pipe 1102, and the lubricating oil is temporarily stored. The liquid level of the lubricating oil in the storage chamber 1110 is detected by the liquid level sensor 1111. When the liquid level of the lubricating oil in the storage chamber 1110 is high, it means that the air intake module 104 is abnormal, resulting in a decrease in the air intake volume, or the lubricating oil level in the head 102 is too high. At this time, an alarm is sounded through the alarm 1101 to remind the staff to carry out maintenance to ensure the use effect and life of the air compressor body 1. When the liquid level of the lubricating oil in the storage chamber 1110 is low, it means that the lubricating oil in the head 102 is less. At this time, an alarm is sounded through the alarm 1101;

[0047] When the level of the lubricating oil in the storage chamber 1110 is low, it means that there is less lubricating oil in the machine head 102. At this time, the solenoid valve 802 is opened, and the third movable plate 805 is pushed downward under the action of the second spring 902, so that the lubricating oil stored in the oil storage tank 801 can be squeezed and enter the machine head 102 through the oil replenishing pipe 803, so that the lubricating oil can be quantitatively added to the machine head 102. Through multiple squeezing, it can be ensured that the lubricating oil in the machine head 102 is within the required range, thereby ensuring the use effect and life of the air compressor body 1;

[0048] After the lubricating oil enters the storage chamber 1110, it will be transported forward along the conveyor belt 1107. Under the action of the magnet 1112, the metal chips in the lubricating oil can be adsorbed, so that the metal chips can be adsorbed on the surface of the conveyor belt 1107. When the storage chamber 1110 rotates to the downward position, the lubricating oil can fall to the bottom of the working box 1103, and by starting the pump body 1105, the lubricating oil in the working box 1103 can enter the conveyor belt 1107 through the second connecting pipe 1104, the pump body 1105 and the third connecting pipe 1106 for cooling, while the metal chips continue to be transported forward. When it moves to the top of the collection box 401, the metal debris is separated from the magnet 1112 and can fall on the top of the weighing plate 1113, and is weighed under the action of the weighing sensor 1114, so as to facilitate the detection of the wear condition in the machine head 102. When the weight of the metal debris is large, it indicates that the wear is serious, and an alarm is sounded through the alarm 1101 to remind the staff to carry out maintenance. After the weighing is completed, the cylinder 302 is started, and the scraper 304 is driven to move through the second moving plate 303, so that the metal debris on the top of the weighing plate 1113 can be scraped into the collection box 401 for collection.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet variable frequency screw air compressor, comprising an alarm device arranged on an air compressor body (1), wherein the air compressor body (1) comprises a frame (101), a head (102), a drive motor (103), an air intake module (104), an oil-gas separator (105), a cooler (106) and an air storage tank (107), characterized in that: The alarm device comprises an alarm (1101) fixedly connected to the top of the frame (101), and a first connecting pipe (1102) is fixedly connected to the bottom of the oil-gas separator (105), a working box (1103) is fixedly connected to the lower end of the first connecting pipe (1102), and a second connecting pipe (1104) is fixedly connected to the bottom of the working box (1103), the other end of the second connecting pipe (1104) is fixedly connected to a pump body (1105), and a third connecting pipe (1106) is fixedly connected between the pump body (1105) and the cooler (106), and the working box (1103) is fixedly connected to the third connecting pipe (1106). A conveyor belt (1107) arranged in an annular manner is connected via a conveying mechanism, and the side wall of the conveyor belt (1107) is fixedly connected to two annular ribs (1108), a plurality of baffles (1109) are fixedly connected between the two ribs (1108), and a storage chamber (1110) is formed between two adjacent baffles (1109), a liquid level sensor (1111) is fixedly connected to the top of the working box (1103), and the liquid level sensor (1111) is electrically connected to the alarm (1101), and an oil replenishing mechanism for automatically replenishing oil into the interior of the machine head (102) is arranged at the top of the machine head (102).

2. A permanent magnet variable frequency screw air compressor according to claim 1, characterized in that: A U-shaped magnet (1112) is inserted into the conveyor belt (1107), and the magnet (1112) is fixed to the inner wall of the working box (1103). A weighing plate (1113) is fixedly connected to the inner wall of the working box (1103), and the weighing plate (1113) is located below the conveyor belt (1107). A weighing sensor (1114) is fixedly connected to the bottom of the weighing plate (1113), and the weighing sensor (1114) is electrically connected to the alarm (1101). The working box (1103) ) is provided with a collecting mechanism for collecting metal scraps, the conveying mechanism comprising two symmetrically arranged rotating rods (201) rotatably connected in the working box (1103), and the side wall of each rotating rod (201) is fixedly sleeved with two symmetrically arranged conveying rollers (202), the conveying belt (1107) is sleeved on the side wall of the conveying roller (202), the outer side wall of the working box (1103) is fixedly connected with a motor (203), and the output end of the motor (203) is fixed to one end of the rotating rod (201).

3. A permanent magnet variable frequency screw air compressor according to claim 2, characterized in that: The collecting mechanism comprises a collecting box (401) inserted into a working box (1103), and a handle (402) is fixedly connected to the side wall of the collecting box (401), a partition (1115) is fixedly connected to the bottom of the working box (1103), a scraping mechanism for scraping metal debris on the top of the weighing plate (1113) is arranged in the working box (1103), and a shaking mechanism for shaking the conveyor belt (1107) is arranged in the working box (1103).

4. A permanent magnet variable frequency screw air compressor according to claim 3, characterized in that: The shaking mechanism comprises a first movable plate (501), and a plurality of rubber rods (502) arranged in an array are fixedly connected to the bottom of the first movable plate (501), the first movable plate (501) is connected to the inner wall of the working box (1103) via a first reset mechanism, and the movement of the first movable plate (501) is driven by a driving mechanism.

5. A permanent magnet variable frequency screw air compressor according to claim 4, characterized in that: The first reset mechanism comprises two symmetrically arranged T-shaped guide rods (601) fixedly connected to the top of the first movable plate (501), and the side walls of the T-shaped guide rods (601) are sleeved with connecting plates (602), the connecting plates (602) are fixed to the inner side walls of the working box (1103), and the side walls of each T-shaped guide rod (601) are sleeved with a first spring (603).

6. A permanent magnet variable frequency screw air compressor according to claim 4, characterized in that: The pushing mechanism comprises a pushing plate (701) fixedly connected to the side wall of the first moving plate (501), and a plurality of conical blocks (702) arranged in an array are fixedly connected to the side wall of one of the rotating rods (201).

7. A permanent magnet variable frequency screw air compressor according to claim 3, characterized in that: The scraping mechanism comprises an L-shaped plate (301) fixedly connected to the outer wall of the working box (1103), and the side wall of the L-shaped plate (301) is fixedly connected to a cylinder (302), the telescopic end of the cylinder (302) is fixedly connected to a second movable plate (303), and the second movable plate (303) penetrates into the working box (1103) and is fixedly connected to a scraper (304).

8. The permanent magnet variable frequency screw air compressor according to claim 1, characterized in that: The oil replenishing mechanism comprises an oil replenishing pipe (803) fixedly connected to the top of the machine head (102), and the upper end of the oil replenishing pipe (803) is fixedly connected to a solenoid valve (802), the upper end of the solenoid valve (802) is fixedly connected to an oil storage tank (801), and the oil storage tank (801) is connected to a third movable plate (805) via a second reset mechanism, and the side wall of the oil storage tank (801) is fixedly connected to a refueling pipe (804), and a one-way valve is arranged in the refueling pipe (804).

9. A permanent magnet variable frequency screw air compressor according to claim 8, characterized in that: The second reset mechanism comprises two symmetrically arranged moving rods (901) inserted on the top of the oil storage tank (801), and the lower ends of the moving rods (901) are fixed to the top of the third moving plate (805), and the side walls of each of the moving rods (901) are sleeved with a second spring (902), and the movement of the third moving plate (805) is detected by a detection component.

10. A permanent magnet variable frequency screw air compressor according to claim 9, characterized in that: The detection assembly comprises a mounting block (1002) fixedly connected to the upper end of one of the moving rods (901), a sensing block (1003) fixedly connected to the bottom of the mounting block (1002), and a proximity switch (1001) fixedly connected to the top of the oil storage tank (801).

11. The permanent magnet variable frequency screw air compressor according to claim 1, characterized in that: The frame (101) is an aluminum alloy profile frame.

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