Liquid penetrant testing equipment for metal parts with waste liquid recovery device

Abstract

The invention relates to a liquid penetration testing device for metal parts with a waste liquid recovery device in the field of liquid penetration testing devices. The device comprises a box body, the top end of the box body is rotatably connected to a mesh testing platform, the bottom end of the mesh testing platform is connected to a recovery pool; the recovery pool comprises a main pool body, a spray ring is installed in the main pool body, and a gas nozzle and a liquid nozzle are installed on the spray ring; a recovery structure is installed in the box body, the recovery structure comprises a liquid recovery tank and an air pump, a drainage pipe is connected between the recovery structure and the recovery pool, a liquid adsorption tank is connected between the output end of the drainage pipe and the air pump through a three-way pipe, two shunt pipes are installed at the output end of the air pump, one shunt pipe is connected to the side output end of the three-way pipe, and the other shunt pipe is communicated with the spray ring, so as to realize the combination of automatic recovery of penetrant and penetration testing steps, effectively solve the problem of penetrant recovery in the penetration testing process, and improve work efficiency and safety.

Description

Technical Field

[0001] The present invention relates to a liquid penetrant testing device for metal parts with a waste liquid recovery device, and in particular to a liquid penetrant testing device for metal parts with a waste liquid recovery device applied in the field of liquid penetrant testing devices. Background Art

[0002] Liquid penetrant flaw detector is a non-destructive testing equipment, mainly used to detect cracks, pores, looseness and other defects on the surface of materials. Its basic principle is to use the capillary phenomenon of the penetrant to apply the penetrant on the surface of the object to be tested, and the penetrant will enter the defect. Then, the excess penetrant on the surface is removed by cleaning, and finally, the developer is used to absorb the penetrant in the defect to form a visible defect image.

[0003] The main function of this instrument is to detect surface defects of various metal and non-metal materials. It is widely used in aerospace, automobile manufacturing, precision casting, welding and other industries. At the same time, it can also be used to detect the surface condition after heat treatment, forging, welding and other processes.

[0004] In order to solve the problem of penetrant recovery in liquid penetration testing, a design in the market that uses a pool to collect liquid for recovery has a certain market share.

[0005] Chinese invention patent CN108051451B discloses a spring penetration flaw detection device, including a frame body, an adjustable fixing rod, a first spring, a pull rod and a second spring. The frame body is a rectangular hollow structure, and the right frame of the rectangular hollow structure is provided with a plurality of right mounting holes for installing the adjustable fixing rod; the left frame of the rectangular hollow structure is provided with a plurality of left mounting holes for installing the pull rod; the adjustable fixing rod is a stepped shaft with a knurled head, and the left end is a cylinder with an annular groove, and the cylinder is placed in the right mounting hole, and an open washer for fixing the adjustable fixing rod on the right frame is clamped in the annular groove, the first spring is connected to the cylinder of the adjustable fixing rod, and the second spring is connected to the pull rod. When the spring penetration flaw detection device of the present invention is adopted, when performing spring penetration flaw detection, it is only necessary to connect the two ends of the spring to be detected with the first spring and the second spring respectively to perform the flaw detection work, which is convenient for assembly and disassembly, and greatly improves the work efficiency.

[0006] Current liquid penetrant flaw detectors often fail to achieve efficient recycling when processing waste liquid, resulting in a large amount of penetrant and developer being wasted, increasing operating costs and potentially polluting the environment. Furthermore, waste liquid treatment is not thorough. Existing recycling systems may not be able to completely remove harmful components in waste liquid, and residual chemicals may pose a threat to the environment and human health. Existing liquid penetrant flaw detectors often lack automation in their waste liquid recycling process, requiring frequent manual intervention, which not only reduces work efficiency but also increases the risk of operational errors. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the waste liquid recovery process of the existing liquid penetrant flaw detector is often lacking in automation and requires frequent manual intervention, which not only reduces work efficiency but also increases the risk of operational errors.

[0008] In order to solve the above problems, the present invention provides a liquid penetrant testing device for metal parts with a waste liquid recovery device, comprising a box body, the top end of which is rotatably connected to a mesh detection table, and the bottom end of which is connected to a recovery tank;

[0009] The recovery pool comprises a main pool body, a spray ring is installed in the main pool body, and a gas nozzle and a liquid nozzle are installed on the spray ring;

[0010] A recovery structure is installed in the box, the recovery structure includes a liquid recovery tank and an air pump, a drainage pipe is connected between the recovery structure and the recovery tank, the drainage pipe includes an external liquid discharge pipe, an internal exhaust pipe is inserted in the external liquid discharge pipe, and a movable air plug is inserted at the top of the internal exhaust pipe;

[0011] The movable air plug includes a limit sleeve installed in the inner exhaust pipe, an electromagnet is installed on the top of the limit sleeve, an air guide column is slidably arranged in the limit sleeve, a baffle covering the drainage pipe is connected to the top of the air guide column, and an air flow channel is opened between the baffle and the air guide column; a permanent magnet matching the electromagnet is installed at the bottom of the baffle

[0012] A liquid adsorption tank is connected between the output end of the inner exhaust pipe and the air pump through a three-way pipe. The liquid adsorption tank includes a sealing sleeve connected to the inner exhaust pipe. The side end of the bottom of the sealing sleeve is directly connected to the input end of the air pump with an air pipe. An adsorption column is detachably installed on the lower end of the sealing sleeve. Two shunt pipes are installed at the output end of the air pump. One shunt pipe is connected to the side output end of the three-way pipe, and the other shunt pipe is communicated with the spray ring.

[0013] In the above-mentioned liquid penetrant testing equipment for metal parts with a waste liquid recovery device, it is possible to combine the automated recovery of the penetrant with the penetrant testing step, effectively solving the problem of penetrant recovery during the penetrant testing process and improving work efficiency and safety.

[0014] As a further improvement of the present application, the upper end surface of the inner exhaust pipe is higher than the upper end surface of the outer liquid discharge pipe, and a sealing groove matching the inner exhaust pipe is formed at the lower end of the blocking cover.

[0015] As a further improvement of the present application, an air hole matching the initial position of the air flow channel is opened at the upper end of the inner exhaust pipe, and a blocking cover matching the air hole is installed on the outer wall of the inner exhaust pipe.

[0016] As a further improvement of the present application, the lower inner wall of the spray ring is provided with a plurality of guide grooves connected to the external liquid discharge pipe. The plurality of guide grooves are arranged around the external liquid discharge pipe. When the baffle covers the drainage pipe, the external liquid discharge pipe is connected to the spray ring through the guide grooves.

[0017] As a further improvement and supplement to the present application, a sealing buckle ring is slidably provided on the outer end of the blocking cover, and a sealing block matching the guide groove is installed on the sealing buckle ring.

[0018] As another improvement of the present application, a sedimentation tank is provided in the liquid recovery tank, a liquid guide pipe is connected between the liquid recovery tank and the external liquid discharge pipe, and the liquid guide pipe extends along the inner wall of the liquid recovery tank to the lower end of the liquid recovery tank.

[0019] As another improvement of the present application, the adsorption column includes a mesh tube connected to the lower output end of the three-way pipe, an adsorption sponge is sleeved on the mesh tube, the outer end of the adsorption sponge is covered with a waterproof and breathable layer, a sealing cover matching the sealing sleeve is installed at the lower end of the adsorption column, and a weighing sensor is installed on the sealing cover.

[0020] As another improvement of the present application, it also includes a waste liquid recovery control system, which includes a processor installed in a box, and the processor is connected to a process module, a data processing module, a control module and a monitoring module;

[0021] The control module is provided with a liquid recovery mode, a gas recovery mode and a self-cleaning mode; the liquid recovery mode introduces the recovered fluid into the liquid recovery tank, and the gas recovery mode introduces the recovered fluid into the liquid adsorption tank;

[0022] The process module is used to confirm the working steps of the penetration test. The process module matches the penetration test process with different recovery modes;

[0023] The monitoring module monitors the operation of each recycling mode in real time; when abnormal data is detected, an alarm signal is issued in time;

[0024] The data processing module is used for data collection and analysis. The data processing module collects real-time monitoring data during the waste liquid recovery process from the monitoring module.

[0025] As another improvement supplement to the present application, the specific working steps of the self-cleaning mode include: first flushing the recovery pool through a liquid nozzle, then air-drying the recovery pool through a gas nozzle for a set time, and then cleaning the drainage pipe. At this time, the air pump works, first pumping air into the inner exhaust pipe, so that the liquid remaining on the inner wall of the inner exhaust pipe is introduced into the liquid adsorption tank. After pumping air for a set time, the inner exhaust pipe in a closed state is blown for a set time, and the air flow enters the external liquid discharge pipe through the air vent, so that the liquid remaining on the inner wall of the external liquid discharge pipe is transferred to the liquid recovery tank.

[0026] In summary, this solution combines the automated recovery of penetrants with the penetration testing steps, effectively solving the problem of penetrant recovery during penetration testing, improving work efficiency and safety, and having environmental and economic benefits by reducing penetrant waste and labor costs, making it easy to ensure that industrial penetration testing is efficient, safe, and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a stereogram of the first and second embodiments of the present application;

[0028] Figure 2 It is a cross-sectional view of the first and second embodiments of the present application;

[0029] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0030] Figure 4 for Figure 2 Schematic diagram of the structure at B in the middle;

[0031] Figure 5 This is a cross-sectional view of the recovery tank of the first and second embodiments of the present application;

[0032] Figure 6 This is a diagram showing the working state changes of the movable gas plug in the first and second embodiments of the present application;

[0033] Figure 7 This is a system block diagram of the second implementation mode of this application.

[0034] Description of the numbers in the figure:

[0035] 1 box body, 2 mesh detection table, 3 recovery pool, 31 main pool body, 32 spray ring, 4 drainage pipe, 41 external drainage pipe, 42 internal exhaust pipe, 5 recovery structure, 51 liquid recovery tank, 52 air pump, 6 movable air plug, 61 limit sleeve, 62 electromagnet, 63 air guide column, 64 baffle, 65 air flow channel, 7 liquid adsorption tank, 71 sealing sleeve, 72 adsorption column. DETAILED DESCRIPTION

[0036] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] Figure 1-6 It is shown that a liquid penetrant testing device for metal parts with a waste liquid recovery device comprises a box body 1, the top of the box body 1 is rotatably connected to a mesh testing platform 2, the mesh testing platform 2 is in the shape of a mesh plate, and the bottom of the mesh testing platform 2 is connected to a recovery tank 3; a spray device for cleaning the penetrant on the parts is installed on the upper side of the mesh testing platform 2;

[0039] The recovery pool 3 includes a main pool body 31, a spray ring 32 is installed in the main pool body 31, and a gas nozzle and a liquid nozzle are installed on the spray ring 32; the gas nozzles on the spray ring 32 are arranged in pairs, one gas nozzle is facing the mesh detection table 2, and the other gas nozzle is facing the movable gas plug 6; the output end of the liquid nozzle is in contact with the inner wall of the main pool body 31, and the liquid nozzle flushes the inner wall of the main pool body 31 when spraying water;

[0040] A recovery structure 5 is installed in the box body 1, and the recovery structure 5 includes a liquid recovery tank 51 and an air pump 52. A drainage pipe 4 is connected between the recovery structure 5 and the recovery pool 3. The drainage pipe 4 includes an external liquid discharge pipe 41. An internal exhaust pipe 42 is inserted into the external liquid discharge pipe 41. A movable air plug 6 is inserted at the top of the internal exhaust pipe 42.

[0041] The movable air plug 6 includes a limiting sleeve 61 installed in the inner exhaust pipe 42, an electromagnet 62 is installed at the top of the limiting sleeve 61, an air guide column 63 is slidably arranged in the limiting sleeve 61, a blocking cover 64 covering the drainage pipe 4 is connected to the top of the air guide column 63, and an air flow channel 65 is opened between the blocking cover 64 and the air guide column 63; a permanent magnet matching the electromagnet 62 is installed at the bottom of the blocking cover 64;

[0042] Optionally, a sealing buckle ring is slidably provided at the outer end of the blocking cover 64, and a sealing block matching the guide groove is installed on the sealing buckle ring. The sealing buckle ring is pressed down and the sealing block closes the guide groove. At this time, the input ends of the external drain pipe 41 and the internal exhaust pipe 42 are both closed. At this time, the recovery pool 3 can be filled with a penetrant so as to perform an immersion and penetration treatment on the parts.

[0043] When the electromagnet 62 is working, it repels the permanent magnet, thereby moving the cover 64 upward and exposing the air inlet end of the air flow channel 65. When the movable air plug 6 is reset, the magnetic pole of the electromagnet 62 is reversed, thereby attracting the permanent magnet, so that the inner exhaust pipe 42 and the cover 64 are clamped.

[0044] A liquid adsorption tank 7 is connected between the output end of the inner exhaust pipe 42 and the air pump 52 through a three-way pipe. The liquid adsorption tank 7 includes a sealing sleeve 71 connected to the inner exhaust pipe 42. The side end of the bottom of the sealing sleeve 71 is directly connected to the input end of the air pump 52 with an air pipe. The lower end of the sealing sleeve 71 is detachably installed with an adsorption column 72. The adsorption column 72 directly adsorbs the atomized penetrant. There are fewer impurities in the penetrant on the adsorption column 72, which is convenient for direct use after desorption. Two shunt pipes are installed at the output end of the air pump 52, one shunt pipe is connected to the side output end of the three-way pipe, and the other shunt pipe is connected to the spray ring 32; the air pump 52 can blow air into the inner exhaust pipe 42 through a shunt pipe. When blowing, the airflow enters the outer liquid discharge pipe 41 through the air permeable port at the top of the inner exhaust pipe 42, so as to achieve drying treatment of the outer liquid discharge pipe 41 by the airflow, so as to remove the liquid attached to the inner wall of the outer liquid discharge pipe 41;

[0045] The air pump 52 draws air from the inner exhaust pipe 42 through another shunt pipe. When the movable air plug 6 is opened, the air pump draws air so that the atomized penetrant in the recovery tank 3 is drawn into the inner exhaust pipe 42.

[0046] The upper end surface of the inner exhaust pipe 42 is higher than the upper end surface of the outer liquid discharge pipe 41, and a sealing groove matching the inner exhaust pipe 42 is opened at the lower end of the blocking cover 64; an air vent matching the initial position of the air flow channel 65 is opened at the upper end of the inner exhaust pipe 42, and a blocking cover matching the air vent is installed on the outer wall of the inner exhaust pipe 42.

[0047] The lower inner wall of the spray ring 32 is provided with a plurality of guide grooves communicating with the external drainage pipe 41 . The plurality of guide grooves are arranged around the external drainage pipe 41 . When the blocking cover 64 covers the drainage pipe 41 , the external drainage pipe 41 communicates with the spray ring 32 through the guide grooves.

[0048] A sedimentation tank is provided in the liquid recovery tank 51, and a liquid level sensor is installed in the sedimentation tank. The sedimentation tank is used to precipitate and separate the mixture of the penetrant and water, so as to separate and recover the mixture of the penetrant and water after cleaning the parts. A liquid guide tube is connected between the liquid recovery tank 51 and the external drainage pipe 41, and the liquid guide tube extends along the inner wall of the liquid recovery tank 51 to the lower end of the liquid recovery tank 51.

[0049] The adsorption column 72 includes a mesh tube connected to the lower output end of the tee pipe, an adsorption sponge is sleeved on the mesh tube, and the outer end of the adsorption sponge is covered with a waterproof and breathable layer. A sealing cover matching the sealing sleeve 71 is installed at the lower end of the adsorption column 72, and a weighing sensor is installed on the sealing cover;

[0050] The steps of penetration testing include:

[0051] A1, Penetration: According to the size, shape, quantity and inspection location of the parts, select the appropriate penetration method, such as immersion, brushing or spraying, to apply the penetrant to the inspected surface; the penetrant must wet the entire inspected surface;

[0052] When the penetrant is applied to the surface of the part by brushing or spraying, the electromagnet 62 works, causing the electromagnet 62 to repel the permanent magnet. At this time, the cover 64 rises as a whole, thereby exposing the air flow channel 65. At the same time, the air pump works to pump air. At this time, the atomized penetrant enters the inner exhaust pipe 42 through the movable air plug 6, and enters the liquid adsorption tank 7 after being guided by the inner exhaust pipe 42 and adsorbed by the adsorption column 72, thereby realizing the recovery of the atomized penetrant; when the penetration work is finished, the movable air plug 6 is reset;

[0053] A2 Cleaning: After the penetrant has been applied for a specified penetration time, the excess penetrant on the surface must be cleaned. The spray equipment on the upper side of the mesh detection table 2 is used for cleaning. During cleaning, the mixture of penetrant and water is discharged into the liquid recovery tank 51 through the external liquid discharge pipe 41 and allowed to settle to separate the penetrant from the water, which is convenient for subsequent penetrant recovery:

[0054] A3, the cleaned workpiece can be dried by blowing with compressed air or wiping with a rag; optionally, in the drying process, the gas nozzle on the spray ring 32 is used to blow air to the mesh detection table 2 to assist the drying of the parts;

[0055] A4, Development: Brush or spray a thin and even layer of developer on the surface of the workpiece. The developer can be magnesium trioxide powder, etc. Keep it for 15-30 minutes before observation.

[0056] This solution can achieve the use of different recovery methods to recover the penetrant in each step of different penetration tests, efficiently recover the penetrant used in excess during penetration work, and facilitate the recovery of the penetrant mixed with other liquids during cleaning. The recovery work is automatically carried out along with the penetration test work steps, reducing manual operations and increasing safety.

[0057] Second implementation method:

[0058] Figure 1-6 As shown, it also includes a waste liquid recovery control system, which includes a processor installed in the box 1, and the processor is connected to a process module, a data processing module, a control module and a monitoring module;

[0059] The control module is provided with a liquid recovery mode, a gas recovery mode and a self-cleaning mode; the liquid recovery mode introduces the recovered fluid into the liquid recovery tank 51, and the gas recovery mode introduces the recovered fluid into the liquid adsorption tank 7; the self-cleaning mode is used for cleaning the recovery pool 3 and the drainage pipe 4;

[0060] Control module: According to the analysis results of the data processing module and the instructions of the process module, it controls the specific operations of the recovery structures such as liquid recovery tanks, air pumps, etc., such as starting, stopping, and adjusting.

[0061] The process module is used to confirm the working steps of penetration testing. The process module matches the penetration testing process with different recovery modes. After confirming the specific steps of the current penetration testing work, the corresponding recovery mode is selected to recover the penetrant. For example, the gas recovery mode is selected during penetration work, and then the start and stop of related equipment, such as electromagnets, air pumps and other equipment, are controlled to ensure the smooth progress of the testing and recovery process; the timing of waste liquid recovery is combined with the testing steps to improve the waste liquid recovery efficiency before and after the test.

[0062] The data processing module is used for data collection and analysis. The data processing module collects real-time data in the waste liquid recovery process from monitoring modules, sensors and other equipment, such as waste liquid volume, gas concentration, equipment status, etc.

[0063] During data analysis, the collected data is processed and analyzed to determine the waste liquid recovery effect and predict the recovery efficiency.

[0064] The monitoring module monitors the operation of each recovery mode in real time, including the amount of waste liquid stored in the liquid recovery tank 51, the amount of adsorption in the liquid adsorption tank 7 and the operating status of the equipment. When abnormal data is detected, an alarm signal is issued in time to remind the operator to pay attention and take corresponding treatment measures; ensure the stability and safety of the waste liquid recovery process, and discover and deal with potential problems in time;

[0065] Humidity sensors are installed in the recovery tank 3, the external liquid discharge pipe 41 and the internal exhaust pipe 42. When the penetration detection is not performed, when the monitoring value of any humidity sensor exceeds the set value, the monitoring module feeds back a signal to the controller, and the self-cleaning mode is triggered at this time;

[0066] The processor is connected to the process module, data processing module, control module and monitoring module through signal lines to realize data reception, processing and instruction issuance.

[0067] The process module controls the start, stop and switching of each device in the box 1 according to the preset process flow to ensure the orderly progress of penetration detection and waste liquid recovery.

[0068] The data processing module obtains real-time data from the monitoring module, sensors in the liquid recovery tank and other equipment, analyzes and processes the data, and then transmits the results to the control module.

[0069] The control module controls the liquid inlet, sedimentation treatment, start and stop of the air pump, and gas circulation of the liquid recovery tank 51 according to the analysis results and the instructions of the process module, so as to realize the automatic recovery and treatment of the waste liquid.

[0070] The monitoring module monitors various parameters in the waste liquid recovery process in real time to ensure the safety and efficiency of the recovery process.

[0071] The specific working steps of the self-cleaning mode include: first flushing the recovery pool 3 through the liquid nozzle, then air-drying the recovery pool 3 through the gas nozzle for a set time, and then cleaning the drainage tube 4. At this time, the air pump works, first evacuating the inner exhaust pipe 42 to allow the liquid remaining on the inner wall of the inner exhaust pipe 42 to be introduced into the liquid adsorption tank 7. After the evacuation time is set, the inner exhaust pipe 42 in the closed state is blown for a set time, and the air flow enters the outer liquid discharge pipe 41 through the air vent, so that the liquid remaining on the inner wall of the outer liquid discharge pipe 41 is transferred to the liquid recovery tank 51.

[0072] This scheme aims to improve the efficiency of penetrant recovery during the penetration test through automation technology, to ensure the efficiency, safety and environmental protection of the test process; through the integrated liquid recovery tank 51 and liquid adsorption tank 7, the automatic recovery of the penetrant in each step of the penetration test is realized, manual operation is reduced, work efficiency is improved, excessive use of penetrant is effectively recovered, the waste of penetrant is reduced, and the testing cost is reduced; and the automated operation reduces the risk of workers coming into contact with hazardous substances, thereby improving work safety.

[0073] Compared with traditional manual recycling, this solution achieves fast and accurate recycling through automated equipment, significantly improves recycling efficiency, and facilitates precise control of the use and recycling of penetrants, avoiding excessive consumption and waste of penetrants. At the same time, the automated process reduces dependence on operators and reduces labor costs.

[0074] To sum up, this solution combines the automated recovery of penetrants with the penetration testing steps, effectively solving the problem of penetrant recovery during penetration testing, improving work efficiency and safety, and having environmental and economic benefits by reducing penetrant waste and labor costs, making it easy to ensure that industrial penetration testing is efficient, safe, and environmentally friendly.

[0075] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. 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 scope of protection of the present invention.

Claims

1. A liquid penetrant testing device for metal parts with a waste liquid recovery device, comprising a box (1), the top end of the box (1) is rotatably connected to a mesh detection platform (2), the bottom end of the mesh detection platform (2) is connected to a recovery tank (3), characterized in that: The recovery pool (3) comprises a main pool body (31), a spray ring (32) is installed in the main pool body (31), and a gas spray head and a liquid spray head are installed on the spray ring (32); A recovery structure (5) is installed in the box body (1), the recovery structure (5) comprising a liquid recovery tank (51) and an air pump (52), a drainage pipe (4) is connected between the recovery structure (5) and the recovery pool (3), the drainage pipe (4) comprising an external liquid discharge pipe (41), an internal exhaust pipe (42) is passed through the external liquid discharge pipe (41), and a movable air plug (6) is inserted at the top end of the internal exhaust pipe (42); The movable air plug (6) comprises a limiting sleeve (61) installed in the inner exhaust pipe (42), an electromagnet (62) is installed at the top of the limiting sleeve (61), an air guide column (63) is slidably arranged in the limiting sleeve (61), a blocking cover (64) covering the drainage pipe (4) is connected to the top of the air guide column (63), an air flow channel (65) is provided between the blocking cover (64) and the air guide column (63), and a permanent magnet matching the electromagnet (62) is installed at the bottom of the blocking cover (64); A liquid adsorption tank (7) is connected between the output end of the inner exhaust pipe (42) and the air pump (52) via a three-way pipe, the liquid adsorption tank (7) comprising a sealing sleeve (71) connected to the inner exhaust pipe (42), a side end of the bottom of the sealing sleeve (71) being directly connected to an air pipe with an input end of the air pump (52), an adsorption column (72) being detachably mounted on the lower end of the sealing sleeve (71), two shunt pipes being mounted on the output end of the air pump (52), one of the shunt pipes being connected to a side output end of the three-way pipe, and the other of the shunt pipes being in communication with a spray ring (32); It also includes a waste liquid recovery and control system, the waste liquid recovery and control system includes a processor installed in the box (1), and the processor is connected to a process module, a data processing module, a control module and a monitoring module; The control module is provided with a liquid recovery mode, a gas recovery mode and a self-cleaning mode; the liquid recovery mode introduces the recovered fluid into a liquid recovery tank (51), the gas recovery mode introduces the recovered fluid into a liquid adsorption tank (7), and the self-cleaning mode is used for cleaning the recovery pool (3) and the drainage tube (4); The process module is used to confirm the working steps of the penetration test, and the process module matches the penetration test process with different recovery modes; The monitoring module monitors the operation of each recovery mode in real time and sends out an alarm signal in time when abnormal data is detected; The data processing module is used for data collection and analysis, and collects real-time monitoring data during the waste liquid recovery process from the monitoring module.

2. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 1, characterized in that: The upper end surface of the inner exhaust pipe (42) is higher than the upper end surface of the outer liquid discharge pipe (41), and the lower end of the blocking cover (64) is provided with a sealing groove matching the inner exhaust pipe (42).

3. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 1, characterized in that: An air hole matching the initial position of the air flow channel (65) is provided at the upper end of the inner exhaust pipe (42), and a blocking cover matching the air hole is installed on the outer wall of the inner exhaust pipe (42).

4. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 1, characterized in that: The lower inner wall of the spray ring (32) is provided with a plurality of guide grooves which are in communication with the external liquid discharge pipe (41); the plurality of guide grooves are arranged around the external liquid discharge pipe (41); when the blocking cover (64) covers the drainage pipe (4), the external liquid discharge pipe (41) is in communication with the spray ring (32) through the guide grooves.

5. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 4, characterized in that: A sealing buckle ring is slidably provided at the outer end of the blocking cover (64), and a sealing block matching the guide groove is mounted on the sealing buckle ring.

6. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 1, characterized in that: A sedimentation tank is provided in the liquid recovery tank (51), and a liquid guide pipe is connected between the liquid recovery tank (51) and the external liquid discharge pipe (41), and the liquid guide pipe extends along the inner wall of the liquid recovery tank (51) to the lower end of the liquid recovery tank (51).

7. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 3, characterized in that: The adsorption column (72) comprises a mesh tube connected to the lower output end of the three-way pipe, an adsorption sponge is sleeved on the mesh tube, the outer end of the adsorption sponge is coated with a waterproof and breathable layer, and a sealing cover matching the sealing sleeve (71) is installed at the lower end of the adsorption column (72), and a weighing sensor is installed on the sealing cover.

8. The liquid penetrant testing device for metal parts with a waste liquid recovery device according to claim 1, characterized in that: The specific working steps of the self-cleaning mode include: firstly flushing the recovery pool (3) through the liquid nozzle, then air-drying the recovery pool (3) through the gas nozzle for a set time, and then cleaning the drainage pipe (4). At this time, the air pump works to first evacuate the inner exhaust pipe (42) so that the liquid remaining on the inner wall of the inner exhaust pipe (42) is introduced into the liquid adsorption tank (7). After the evacuation time is set, the inner exhaust pipe (42) in a closed state is blown for a set time, and the air flow enters the outer liquid discharge pipe (41) through the air vent, so that the liquid remaining on the inner wall of the outer liquid discharge pipe (41) is transferred to the liquid recovery tank (51).

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