CN117871789B - Detection device applied to large-size air compressor - Google Patents

Abstract

The invention discloses a detection device applied to a large-size air compressor, which belongs to the technical field of detection devices and comprises a device base, wherein an upper shell is fixedly arranged at the upper end of the device base, an installation pipeline is welded in the middle of the upper side of the upper shell, an observation pipeline is fixedly arranged on one side of the front side of the installation pipeline, a filtering pipeline is fixedly arranged on the other side of the front side of the installation pipeline, and the middle of the observation pipeline is fixedly provided with the observation device.

Description

Detection device for large-size air compressors

Technical Field

The present invention relates to the technical field of detection devices, and more specifically, to a detection device applied to a large-size air compressor.

Background technique

Air compressor is based on the basic principles of gas mechanics and thermodynamics. It can be used for gas transportation, gas synthesis and polymerization, refrigeration and gas separation, as aerodynamics, etc. It is a kind of equipment widely used in modern industrial production. The air compressor can introduce air into the cylinder of the air compressor, and then the piston moves upward to compress the gas, reduce the volume of the air, increase the pressure inside the gas, and then the compressed air is pushed into a gas tank or pipeline system for supply when needed.

After long-term use, large-sized air compressors may have impurities in the circulating oil, which may easily cause wear of internal components, or gaps in the air pipes of the air compressors, resulting in insufficient air supply. Therefore, maintenance personnel are required to regularly use detection devices to maintain the air compressors. When inspecting large air compressors, operators need to carry a variety of equipment for distributed detection and sampling. The sampling equipment is large in size, and because a pump is required to extract the hydraulic oil, an external power supply is required, which is inconvenient to move.

Summary of the invention

The purpose of the present invention is to provide a detection device applied to a large-sized air compressor to solve the problems raised in the above-mentioned background technology.

A detection device applied to a large-size air compressor comprises a device base, an upper shell is fixedly installed on the upper end of the device base, a mounting pipe is welded in the middle of the upper side of the upper shell, an observation pipe is fixedly installed on one side of the front side of the mounting pipe, a filter pipe is fixedly installed on the other side of the front side of the mounting pipe, an observation device is fixedly installed in the middle of the observation pipe, a filter device is arranged in the middle of the filter pipe, the bottom of the observation pipe and the filter pipe are fixedly connected by a connecting pipe, an air pressure detection pipe is fixedly installed in the middle of the mounting pipe located at the rear side of the liquid inlet pipe and the liquid outlet pipe, and a gas detection device is arranged in the middle of the air pressure detection pipe;

A liquid inlet pipe is provided at the upper end of the observation pipe, a liquid outlet pipe is provided at the upper end of the filter pipe, a fixing plate is welded on the rear side of the inner top wall of the upper shell, a transmission device is fixedly installed on the front side of the upper end of the device base away from the filter pipe, an exhaust pipe is fixedly installed on the lower end of the air pressure detection tube through the installation pipe, one end of the exhaust pipe penetrates the side wall of the device base and extends to its outside, an air filtering device is fixedly installed, and a synchronous drainage device is provided on the inner side of the connecting pipe.

By adopting the above technical solution, the device can drive the fan to drive the turbine blades inside the connecting pipe to rotate while performing air detection on the air compressor, so that the detected oil can be circulated and extracted synchronously, so that the power supply demand of the overall detection device is small and can be used for a long time.

Furthermore, the observation device includes a first filter cartridge disposed in the middle of the front side of the observation pipe, and a first observation port is disposed in the middle of the front side of the first filter cartridge, and the first observation port is a transparent PVC material component. By adopting the above technical solution, when the oil of the air compressor passes through the first observation port, the operator can directly observe whether the color of the oil is normal and whether the oil contains impurities, thereby directly judging whether the oil is contaminated.

Furthermore, the filtering device includes a second filter cartridge arranged in the middle of the filtering pipe, a second observation port is opened on the front side of the second filter cartridge, an oil filter element is filled on the middle inner wall of the second filter cartridge, and the second observation port is a translucent PVC material component.

By adopting the above technical solution, the oil filter element in the second filter cartridge of the device can filter the impurities in the flowing oil, making it convenient for subsequent inspection personnel to sample the impurities.

Furthermore, the middle parts of the observation pipe and the filter pipe are provided with a clamping groove corresponding to the first filter cartridge and the second filter cartridge, and the inner sides of the upper and lower ends of the first filter cartridge and the second filter cartridge are affixed with sealing rings, and the sealing rings are rubber components. The first filter cartridge and the second filter cartridge are respectively fixed to the observation pipe and the filter pipe by bolts at the four corners of the front side.

By adopting the above technical solution, the operator of the device can remove the bolts of the first filter cartridge and the second filter cartridge to remove the first filter cartridge and the second filter cartridge respectively, and then clean the first observation port and remove the oil filter element inside the second filter cartridge. If the oil contains impurities, the impurities filtered out of the oil filter element can be sampled to facilitate subsequent analysis.

Furthermore, the lower ends of the liquid inlet pipe and the liquid outlet pipe are fixedly welded with pipe clamps, the liquid inlet pipe is connected with the observation pipe through the pipe clamp at the bottom, and the liquid outlet pipe is connected with the filtration pipe through the pipe clamp at the bottom.

By adopting the above technical solution, the device can be easily disassembled, and it is convenient to connect and assemble devices for pipelines of different models.

Furthermore, the transmission device includes a rotating servo fixedly installed on the front edge of the upper end of the device base, a transmission shaft is vertically fixedly installed on the output end of the rotating servo, a first transmission member is fixedly installed on the top of the transmission shaft, a second transmission member is meshingly installed on the rear side of the first transmission member, a threaded member is fixedly installed in the middle of the second transmission member, a pair of stabilizing bearings are arranged on both sides in front of the threaded member, both ends of the threaded member are rotatably inserted into the paired stabilizing bearings, the paired stabilizing bearings are welded to the front and rear inner walls of the connecting pipe, a connecting member is arranged in the middle of the threaded member, and a sliding plate is welded on the upper end of the connecting member.

By adopting the above technical solution, the device can drive the second transmission member to rotate by rotating the steering gear through the first transmission member, so that the upper sliding plate can be driven to move forward and backward through the connecting member.

Furthermore, the air filtering device comprises an air filter cartridge threadedly mounted on the side of the exhaust pipe, an air filter element is arranged inside the air filter cartridge, and a stainless steel metal mesh is fixedly arranged on the side of the air filter cartridge away from the exhaust pipe.

By adopting the above technical solution, the air filter element of the device can filter impurities from the air, thereby facilitating the detection of whether the air inside the air compressor is polluted.

Furthermore, the synchronous drainage device includes a turbine blade arranged in the middle of the connecting pipe, a connecting screw is fixedly welded in the middle of the turbine blade, one end of the connecting screw penetrates the side wall of the connecting pipe and extends to the interior of the exhaust duct, and a driving fan is fixedly installed, and bearings are provided at the side walls of the connecting screw that passes through the connecting pipe and the exhaust duct, and sealing rings are provided at the contact positions of the bearings, the connecting pipe and the exhaust duct.

By adopting the above technical solution, when the driving fan of the device is driven by the airflow ejected by the air compressor, the driving fan can rotate and synchronously drive the turbine blades to rotate through the connecting screw, so that the internal oil circulates, reducing the overall cost and saving energy.

Furthermore, an exhaust box is welded to the side of the device base through which the exhaust duct penetrates, a device door is installed on the side of the exhaust box away from the device base through a hinge, a lithium battery is fixedly installed on the inner wall of the device base on the side away from the exhaust box through bolts, and four universal wheels are fixedly installed on the four bottom corners of the device base through bolts.

By adopting the above technical solution, when the device is being tested, the door of the device can be opened to facilitate exhaust, and the universal wheels at the bottom can facilitate the operator to push the whole device.

Compared with the prior art, the advantages of the present invention are:

In the present invention, by providing a connecting pipe, an exhaust pipe and a synchronous drainage device, when performing air detection on the air compressor, the fan can be driven to simultaneously drive the turbine blades inside the connecting pipe to rotate, so that the detected oil can be circulated and extracted synchronously, making the sampling result more comprehensive, and the power supply demand of the overall detection device is relatively small, and mobile detection can be carried out freely without being restricted by whether the site has additional power supply, and the scope of application is wider.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the present invention;

FIG2 is a cross-sectional view of the overall structure of the present invention;

FIG3 is a cross-sectional view of an exhaust box of the present invention;

FIG4 is a schematic diagram of the position structure of the sliding plate of the present invention;

FIG5 is a schematic structural diagram of the transmission device position of the present invention;

FIG6 is a cross-sectional view of the connection pipe position of the present invention;

FIG7 is a structural exploded view of the liquid inlet pipe position of the present invention;

FIG8 is a disassembled view of the filter pipe position of the present invention;

FIG. 9 is a disassembled view of the filter pipe position of the present invention.

Explanation of the numbers in the figure: 1. first filter cartridge; 2. first observation port; 3. transmission shaft; 301. first transmission member; 302. connecting member; 303. threaded member; 304. second transmission member; 4. upper shell; 5. observation pipe; 6. rotating servo; 7. device base; 8. liquid inlet pipe; 9. air pressure detection tube; 901. gas detection device; 10. liquid outlet pipe; 11. second filter cartridge; 12. second observation port; 13. installation pipe; 14. filter pipe; 15. device door; 16. exhaust box; 17. connecting pipe; 18. exhaust pipe; 19. air filter cartridge; 20. fixing plate; 21. sliding plate; 22. stabilizing bearing; 23. air filter element; 24. driving fan; 2401. turbine blade; 2402. connecting screw; 25. pipe clamp; 26. clamping groove; 27. oil filter element; 28. lithium battery.

Detailed ways

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.

As shown in FIGS. 1 to 9 , the embodiment of the present invention provides: comprising a device base 7, an upper shell 4 is fixedly mounted on the upper end of the device base 7, a mounting pipe 13 is welded to the middle of the upper side of the upper shell 4, an observation pipe 5 is fixedly mounted on one side of the front side of the mounting pipe 13, a filter pipe 14 is fixedly mounted on the other side of the front side of the mounting pipe 13, an observation device is fixedly mounted on the middle of the observation pipe 5, a filter device is arranged on the middle of the filter pipe 14, the bottom of the observation pipe 5 and the filter pipe 14 are fixedly connected by a connecting pipe 17, an air pressure detection pipe 9 is fixedly mounted on the middle of the rear side of the liquid inlet pipe 8 and the liquid outlet pipe 10 of the mounting pipe 13, and a gas detection device 901 is arranged on the middle of the air pressure detection pipe 9;

The upper end of the observation pipe 5 is provided with a liquid inlet pipe 8, the upper end of the filter pipe 14 is provided with a liquid outlet pipe 10, a fixing plate 20 is welded on the rear side of the inner top wall of the upper shell 4, a transmission device is fixedly installed on the front side of the upper end of the device base 7 away from the filter pipe 14, the lower end of the air pressure detection tube 9 passes through the installation pipe 13 and is fixedly installed with an exhaust pipe 18, one end of the exhaust pipe 18 penetrates the side wall of the device base 7 and extends to its outside, and an air filter device is fixedly installed, the air filter device includes an air filter cartridge 19 installed on the side of the exhaust pipe 18 by threads, an air filter core 23 is provided on the inner side of the air filter cartridge 19, and a stainless steel metal mesh is fixedly provided on the side of the air filter cartridge 19 away from the exhaust pipe 18. When the air compressor is started, the exhausted air passes through the air filter core 23. If the passing air contains impurities, the impurities will be filtered and retained by the air filter core 23, so as to facilitate subsequent detection, and a synchronous drainage device is provided on the inner side of the connecting pipe 17. An exhaust box 16 is welded on the side of the device base 7 through which the exhaust duct 18 penetrates, and a device door 15 is installed on the side of the exhaust box 16 away from the device base 7 through a hinge, and a lithium battery 28 is fixedly installed on the inner wall of the device base 7 away from the exhaust box 16 through bolts, and four universal wheels are fixedly installed at the four corners of the bottom of the device base 7 through bolts, so that when the device is tested, the device door 15 can be opened for easy exhaust, and the universal wheels at the bottom can facilitate the operator to push the whole. By providing a connecting pipe 17, an exhaust duct 18 and a synchronous drainage device, when the air compressor air is tested, the fan 24 can be driven to drive the turbine blades 2401 inside the connecting pipe 17 to rotate at the same time, so that the tested oil can be circulated and extracted synchronously, so that the sampling result is more comprehensive, and the power supply demand of the overall detection device is small, and it can be freely moved for detection, without being restricted by whether there is additional power supply at the site, and has a wider range of applications;

The observation device includes a first filter cartridge 1 arranged in the middle of the front side of the observation pipe 5, a first observation port 2 is arranged in the middle of the front side of the first filter cartridge 1, and the first observation port 2 is a transparent PVC material component. The filtering device includes a second filter cartridge 11 arranged in the middle of the filtering pipe 14, a second observation port 12 is opened on the front side of the second filter cartridge 11, and an oil filter element 27 is filled in the middle inner wall of the second filter cartridge 11. The second observation port 12 is a translucent PVC material component. The operator can observe whether the color of the oil is normal and whether the oil contains impurities through the observation pipe 5, thereby directly judging whether the oil is contaminated. The oil body is filtered through the second filter cartridge 11. After running for a period of time, the oil body filter element 27 can be removed to detect the substance. The middle parts of the observation pipe 5 and the filter pipe 14 are provided with a card-mounting groove 26 corresponding to the first filter cartridge 1 and the second filter cartridge 11. The inner sides of the upper and lower ends of the first filter cartridge 1 and the second filter cartridge 11 are affixed with sealing rings, which can effectively increase the overall sealing and prevent leakage. The sealing ring is a rubber material component. The first filter cartridge 1 and the second filter cartridge 11 are respectively fixed to the observation pipe 5 and the filter pipe 14 by bolts at the four corners of the front side, which is convenient for subsequent disassembly and cleaning;

The transmission device includes a rotating steering gear 6 fixedly installed with the front edge of the upper end of the device base 7, a transmission shaft 3 is vertically fixedly installed at the output end of the rotating steering gear 6, a first transmission member 301 is fixedly installed at the top of the transmission shaft 3, a second transmission member 304 is meshingly installed on the rear side of the first transmission member 301, a threaded member 303 is fixedly installed in the middle of the second transmission member 304, a pair of stable bearings 22 are arranged on both sides in front of the threaded member 303, both ends of the threaded member 303 are rotatably inserted into the paired stable bearings 22, the paired stable bearings 22 are welded to the front and rear inner walls of the connecting pipe 17, a connecting member 302 is arranged in the middle of the threaded member 303, and a sliding plate 21 is welded on the upper end of the connecting member 302, so that the rotating steering gear 6 of the device can drive the second transmission member 304 through the first transmission member 301. The second transmission member 304 rotates, so that the upper sliding plate 21 can be driven to move forward and backward through the connecting member 302. The lower ends of the liquid inlet pipe 8 and the liquid outlet pipe 10 are fixedly welded with pipe clamps 25. The liquid inlet pipe 8 is connected with the observation pipe 5 through the pipe clamp 25 at the bottom, and the liquid outlet pipe 10 is connected with the filter pipe 14 through the pipe clamp 25 at the bottom. The operator can connect the liquid inlet pipe 8 and the liquid outlet pipe 10, and then start the rotating steering engine 6 to drive the sliding plate 21 to move through the first transmission member 301. The sliding plate 21 and the fixed plate 20 are provided with matching arc grooves. When the sliding plate 21 and the fixed plate 20 are combined, the arc grooves of the sliding plate 21 and the fixed plate 20 can lock the liquid inlet pipe 8 and the liquid outlet pipe 10.

The synchronous drainage device includes a turbine blade 2401 arranged in the middle of the connecting pipe 17, a connecting screw 2402 is fixedly welded in the middle of the turbine blade 2401, one end of the connecting screw 2402 penetrates the side wall of the connecting pipe 17 and extends to the inside of the exhaust pipe 18, and a driving fan 24 is fixedly installed, and the connecting screw 2402 passes through the side wall of the connecting pipe 17 and the exhaust pipe 18. The position of the bearing, the connecting pipe 17 and the exhaust pipe 18 are all provided with a sealing ring. When the driving fan 24 is driven by the airflow ejected by the air compressor, the device can be driven by the rotation of the driving fan 24. The turbine blades 2401 are synchronously driven to rotate by connecting the screw rod 2402, so that the internal oil circulates. After the oil in the air compressor oil tank flows into the connecting pipe 17 through the liquid inlet pipe 8, when the high-pressure air passes through the exhaust pipe 18 during air pressure detection, it will drive the driving fan 24 to rotate. At this time, the driving fan 24 will synchronously drive the turbine blades 2401 to rotate together through the connecting screw rod 2402. At this time, the turbine blades 2401 will pump the internal oil out from the liquid outlet pipe 10 along the filter pipe 14, thereby completing the circulation of the oil between the present invention and the oil tank of the air compressor.

Working principle of the present invention: the installer can insert the oil discharge port of the large air compressor into the rubber pipe, and the other end of the pipe is sealed on the upper end of the liquid inlet pipe 8, and another rubber pipe is used to seal the liquid outlet pipe 10 with the oil inlet of the air compressor. After the connection is completed, the operator inserts the pipe clamp 25 at the lower end of the liquid inlet pipe 8 into the observation pipe 5, and inserts the pipe clamp 25 at the lower end of the liquid outlet pipe 10 into the filter pipe 14, and starts the rotating steering gear 6. The rotating steering gear 6 drives the first transmission member 301 to rotate through the transmission shaft 3. The first transmission member 301 is meshed and connected with the second transmission member 304, and the second transmission member 304 drives the threaded member 303 to rotate. At this time, the sliding plate 21 set at the upper end of the connecting member 302 moves toward the fixed plate 20, and the fixed plate 20 and the sliding plate 21 are rotated. An arc groove is provided in the middle part, at which time the fixed plate 20 and the sliding plate 21 will lock and fix the liquid inlet pipe 8 and the liquid outlet pipe 10, and then the air pressure detection tube 9 is connected to the exhaust end of the air compressor, and the air compressor is started. When the compressed air passes through the air pressure detection tube 9, the gas detection device 901 will detect the flow rate and pressure of the air passing through, so as to judge whether there is leakage inside the air compressor, and then the air flow is ejected from the air filter device along the exhaust pipe 18. When the air flow passes through the air filter device, if the filter device of the air compressor itself is damaged, or there are impurities in the compressed air due to internal leakage, when the air flow ejected by the air compressor passes through the air filter device, the impurities will be filtered by the air filter element 23. After the machine has been running for a period of time, the air filter element 23 can be removed to check whether there are foreign objects in the compressed air;

After the oil in the oil tank of the air compressor flows into the connecting pipe 17 through the liquid inlet pipe 8, the high-pressure air passes through the exhaust pipe 18 during the air pressure detection, which will drive the driving fan 24 to rotate. At this time, the driving fan 24 will synchronously drive the turbine blades 2401 to rotate together through the connecting screw 2402. At this time, the turbine blades 2401 will cause the internal oil to be pumped out from the liquid outlet pipe 10 along the filter pipe 14, thereby completing the oil circulation between the present invention and the oil tank of the air compressor. Compared with the traditional discharge of some oil detection, the present invention is easier to detect whether there is contamination inside the oil after the oil has been circulated for a long time during operation. When the oil passes through the first filter cartridge 1, the operator The color of the oil and whether there are impurities inside it can be observed through the first observation port 2. When the oil passes through the oil filter element 27 inside the second filter cartridge 11, some impurities that are difficult to observe will be blocked by the oil filter element 27. After the oil in the tank circulates for a certain period of time, the second filter cartridge 11 can be removed, and the oil filter element 27 can be taken out. The operator can sample and analyze the impurities. Since the synchronous drainage device is used for extraction, the sampling results are more comprehensive, and the power supply demand of the overall detection device is relatively small, and the hanging lithium battery 28 can meet the demand, so that the present invention can be freely mobile for detection, is not restricted by whether there is additional power supply at the site, and has a wider range of applications.

The specific model and specifications of the gas detection device 901 in the present invention need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (5)

1. A detection device for a large-sized air compressor, comprising a device base (7), characterized in that: an upper shell (4) is fixedly mounted on the upper end of the device base (7), a mounting pipe (13) is welded to the middle of the upper side of the upper shell (4), an observation pipe (5) is fixedly mounted on one side of the front side of the mounting pipe (13), a filter pipe (14) is fixedly mounted on the other side of the front side of the mounting pipe (13), an observation device is fixedly mounted in the middle of the observation pipe (5), the observation device comprises a first filter cartridge (1) arranged in the middle of the front side of the observation pipe (5), a first observation port (2) is arranged in the middle of the front side of the first filter cartridge (1), the first observation port (2) is a transparent PVC material component, a filter device is arranged in the middle of the filter pipe (14), the filter device The filter device comprises a second filter cartridge (11) arranged in the middle of a filter pipe (14); a second observation port (12) is provided on the front side of the second filter cartridge (11); an oil filter element (27) is filled on the inner wall of the middle of the second filter cartridge (11); the second observation port (12) is a semi-transparent PVC material component; the bottom of the observation pipe (5) and the filter pipe (14) are fixedly connected via a connecting pipe (17); a liquid inlet pipe (8) is provided at the upper end of the observation pipe (5); a liquid outlet pipe (10) is provided at the upper end of the filter pipe (14); an air pressure detection pipe (9) is fixedly installed on the installation pipe (13) at the middle of the rear side of the liquid inlet pipe (8) and the liquid outlet pipe (10); a gas detection device (901) is provided in the middle of the air pressure detection pipe (9); A fixing plate (20) is welded to the rear side of the inner top wall of the upper shell (4); a transmission device is fixedly mounted on the front side of the upper end of the device base (7) away from the filter pipe (14); the transmission device comprises a rotating steering gear (6) fixedly mounted on the front edge of the upper end of the device base (7); a transmission shaft (3) is vertically fixedly mounted on the output end of the rotating steering gear (6); a first transmission member (301) is fixedly mounted on the top end of the transmission shaft (3); a second transmission member (304) is meshingly mounted on the rear side of the first transmission member (301); a threaded member (303) is fixedly mounted in the middle of the second transmission member (304); a pair of stabilizing bearings (22) are arranged on both sides in front of the threaded member (303); the two ends of the threaded member (303) are rotatably inserted into the paired stabilizing bearings (22); the paired stabilizing bearings (22) are welded to the front and rear inner walls of the connecting pipe (17); a connecting member (302) is arranged in the middle of the threaded member (303); the connecting member (302) is A sliding plate (21) is welded to the upper end, an arc groove is provided in the middle of the fixed plate (20) and the sliding plate (21), an exhaust pipe (18) is fixedly installed on the lower end of the air pressure detection tube (9) through the installation pipe (13), one end of the exhaust pipe (18) penetrates the side wall of the device base (7) and extends to the outside thereof, an air filter device is fixedly installed, and a synchronous drainage device is provided on the inner side of the connecting pipe (17), and the synchronous drainage device includes a turbine fan arranged in the middle of the connecting pipe (17). The turbine blade (2401) is fixedly welded with a connecting screw (2402) in the middle part, one end of the connecting screw (2402) penetrates the side wall of the connecting pipe (17) and extends to the inside of the exhaust pipe (18), and is fixedly installed with a driving fan (24), and the connecting screw (2402) is provided with a bearing at a position where the connecting screw (2402) passes through the side wall of the connecting pipe (17) and the exhaust pipe (18), and the contact position of the bearing with the connecting pipe (17) and the exhaust pipe (18) is provided with a sealing ring. 2. The detection device for large-size air compressor according to claim 1 is characterized in that: the middle parts of the observation pipe (5) and the filter pipe (14) are provided with a clamping groove (26) corresponding to the first filter cartridge (1) and the second filter cartridge (11), and the inner sides of the upper and lower ends of the first filter cartridge (1) and the second filter cartridge (11) are both attached with sealing rings, and the sealing rings are rubber components. The first filter cartridge (1) and the second filter cartridge (11) are respectively fixed to the observation pipe (5) and the filter pipe (14) by bolts at the four front corners. 3. The detection device for large-size air compressor according to claim 1 is characterized in that: the lower ends of the liquid inlet pipe (8) and the liquid outlet pipe (10) are fixedly welded with pipe clamps (25), the liquid inlet pipe (8) is connected to the observation pipe (5) through the pipe clamp (25) at the bottom, and the liquid outlet pipe (10) is connected to the filter pipe (14) through the pipe clamp (25) at the bottom. 4. The detection device for large-size air compressor according to claim 1 is characterized in that: the air filter device comprises an air filter cartridge (19) installed on the side of the exhaust pipe (18) by means of threads, an air filter element (23) is arranged on the inner side of the air filter cartridge (19), and a stainless steel metal mesh is fixedly arranged on the side of the air filter cartridge (19) away from the exhaust pipe (18). 5. The detection device for large-size air compressor according to claim 1 is characterized in that: an exhaust box body (16) is welded to the device base (7) on the side through which the exhaust pipe (18) penetrates, a device door body (15) is installed on the side of the exhaust box body (16) away from the device base (7) through hinged leaves, a lithium battery (28) is fixedly installed on the inner wall of the device base (7) away from the exhaust box body (16) through bolts, and four universal wheels are fixedly installed at the four corners of the bottom of the device base (7) through bolts.