Device and method for checking automobile steering knuckle blank paint degreasing fluid

Abstract

The invention discloses an automobile steering knuckle blank paint degreasing fluid inspection device which comprises a degreasing tank, a blow-off pipe is arranged at the lower end of the degreasing tank, a separation assembly is arranged at the end, away from the degreasing tank, of the blow-off pipe, and a detection assembly is arranged on one side of the separation assembly. The detection assembly comprises a detection seat, a bracket located on the detection seat, a detection cup placed on the detection seat, a conveying pump arranged on the bracket and located above the detection cup, and a liquid conveying hose of which one end is communicated with the inlet end of the conveying pump and the other end is communicated with the paint degreasing liquid separated from the separation assembly; one end of the liquid inlet hose is communicated with the outlet end of the conveying pump, and the other end of the liquid inlet hose enters the detection cup; the indicator bottle is arranged on the bracket and internally provided with a phenolphthalein indicator; the elastic pressing ball is arranged at the upper end of the indicator bottle; the indicator tube is arranged at the lower end of the indicator bottle; and scale marks are arranged on the outer walls of the detection cup and the burette.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to an inspection device and method for automobile steering knuckle blank paint degreasing liquid. Background Art

[0002] The function of paint degreasing liquid: remove oil stains from the surface of objects, including alkaline degreasing agent, emulsion degreasing agent and solvent degreasing agent. Alkaline degreasing agent is suitable for removing oxide film on metal surface and cleaning various oil stains on the surface. Emulsion degreasing agent can remove dirt on metal surface by using the wettability, permeability, emulsification and dispersibility of surfactant. Solvent degreasing agent is used to remove anti-rust oil before installation of industrial and mining machinery and equipment, equipment maintenance during production, cleaning of waste sulfonic oil in bearings and pipelines, cleaning of sulfonic oil solidification layer and oil yellow robe on equipment surface.

[0003] At present, a Chinese patent with announcement number CN218423689U and publication date February 3, 2023 discloses a pre-treatment equipment for a steering knuckle production line, including a base plate, and one side of the upper surface of the base plate is fixedly connected with a double degreasing treatment box, a water washing treatment box, an anti-rust treatment box and a paint spraying treatment box from left to right in sequence, and the inner top walls of the double degreasing treatment box, the water washing treatment box, the anti-rust treatment box and the paint spraying treatment box are fixedly connected with a track, and a slide groove is provided on the front and back of the track, and a pulley is slidably connected inside the slide groove, and a rotating shaft is rotatably connected inside the pulley, and the two ends of the rotating shaft are respectively fixedly connected to the two sides of the inner wall of the U-shaped plate, the bottom end of the U-shaped plate is hingedly connected to a lifting ring, and a hook is hung on the outside of the lifting ring, the bottom end of the hook is fixedly connected to an iron chain, and the bottom end of the iron chain is fixedly connected to a steering knuckle hook, the outside of the U-shaped plate is fixedly connected to a connecting belt, and a motor is provided at one end of the connecting belt.

[0004] Therefore, in the production process of automobile steering knuckles, it is necessary to use paint degreasing liquid to clean the oil stains on the surface of the steering knuckle; the increase in the concentration of the paint degreasing liquid in the degreasing box is often beneficial to the cleaning of the grease of the steering knuckle, but the higher the concentration is not necessarily better. On the contrary, too high a concentration of the degreasing liquid will cause the salting out of the surfactant and float on the liquid surface, resulting in a decrease in the degreasing ability, and some are even worse than those with low concentrations. Therefore, it is necessary to measure the concentration of the paint degreasing liquid in the degreasing box at intervals and regularly to ensure that it is within the range of process index requirements. Summary of the invention

[0005] The purpose of the present invention is to provide an inspection device for paint degreasing liquid of a car steering knuckle blank, which can conveniently measure the solution concentration of the paint degreasing liquid.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an inspection device for paint degreasing liquid of a blank of an automobile steering knuckle, comprising a degreasing tank for degreasing the steering knuckle and having paint degreasing liquid inside, a sewage pipe is arranged at the lower end of the degreasing tank, a separation component for separating impurities and paint degreasing liquid is arranged at one end of the sewage pipe away from the degreasing tank, a detection component for detecting the alkalinity of the paint degreasing liquid is arranged on one side of the separation component, the detection component comprises a detection seat, a bracket located on the detection seat, a detection cup placed on the detection seat, a detection cup arranged on the bracket and located at A delivery pump is disposed above the detection cup, a liquid infusion hose whose one end is connected to the inlet end of the delivery pump and whose other end is connected to the paint degreasing liquid separated in the separation component, a liquid inlet hose whose one end is connected to the outlet end of the delivery pump and whose other end enters the detection cup, an indicator bottle disposed on a bracket and having a phenolphthalein indicator inside, an elastic pressure ball disposed on the upper end of the indicator bottle, an indicator tube disposed at the lower end of the indicator bottle and extending into the detection cup, and a burette disposed on the bracket and having a 0.1 mol / L HCL standard solution inside, wherein scale lines are disposed on the outer walls of the detection cup and the burette.

[0007] By adopting the above technical solution, since the paint degreasing liquid in the degreasing tank is used to clean the steering knuckle, a large amount of impurities are deposited in the lower end of the degreasing tank, wherein the deposited impurities can be discharged by using the sewage pipe, and at the same time, a part of the paint degreasing liquid is mixed in the discharged impurities;

[0008] At this time, the sewage pipe is connected to the separation component, so that the impurities and the paint degreasing liquid are separated by the separation component, and the separated paint degreasing liquid can be transported to the detection cup through the delivery pump, the delivery hose and the liquid inlet hose, wherein the paint degreasing liquid entering the detection cup is controlled to be 10ml, and then the elastic pressure ball on the indicator bottle is pressed, so that 2-3 drops of phenolphthalein indicator are dripped into the detection cup to make the solution in the detection cup red, and then the burette is opened, and 0.1mol / L HCL standard solution is titrated until the red color of the solution just disappears, and the number of milliliters of the consumed HCL standard solution is read as the number of free alkali "points", and then the solution concentration of the paint degreasing liquid can be calculated, and finally the solution concentration of the paint degreasing liquid can be conveniently measured;

[0009] By measuring the concentration of the paint degreasing liquid in the degreasing tank at intervals and at regular intervals, a portion of the impurities accumulated at the bottom of the degreasing tank can be discharged while the concentration is measured, so that the paint degreasing liquid remaining in the impurities can be reasonably utilized while the impurities are discharged.

[0010] The present invention is further configured as follows: the separation component includes a separation tank whose upper end is connected to a sewage pipe, a drainage pipe arranged at the lower end of the separation tank, a compression sleeve embedded in the separation tank, a filter hole opened in the lower end of the compression sleeve for allowing paint degreasing liquid to enter the compression sleeve, a collecting box located below the drainage pipe, and a control component arranged on the drainage pipe and used to control the discharge of the drainage pipe, and the end of the infusion hose away from the delivery pump is connected to the inner wall of the compression sleeve and extends into the lower end of the compression sleeve.

[0011] By adopting the above technical solution, when the impurities and paint degreasing liquid in the sewage pipe are discharged into the separation tank, the control component first controls the drainage pipe to be closed, and the impurities and paint degreasing liquid can be accumulated in the separation tank, and then the compression sleeve is pressed down, and the compression sleeve first closes the sewage pipe, and then the compression sleeve that continues to be pressed down can apply pressure to the impurities and paint degreasing liquid. At this time, the filter holes in the lower end of the compression sleeve can filter the impurities, and the paint degreasing liquid can be pressed out of the filter holes into the inside of the compression sleeve, and then the infusion hose can extract the paint degreasing liquid in the compression sleeve;

[0012] After the infusion hose has finished extracting the paint degreasing liquid, the discharge pipe can be opened to discharge the impurities and excess paint degreasing liquid into the collection box.

[0013] The present invention is further configured as follows: the separation component further comprises a lifting cylinder whose upper end is fixed to the external wall surface and whose lower end is connected to the inner wall of the pressing sleeve.

[0014] By adopting the above technical solution, the lifting cylinder can drive the pressing sleeve to move up and down more conveniently.

[0015] The present invention is further configured as follows: the control member includes a connecting column arranged at the center of the separation tank and passing through the filter hole, and a plug arranged at the lower end of the connecting column and embedded in the drain pipe, and there is a clearance fit between the connecting column and the filter hole.

[0016] By adopting the above technical solution, when the compression sleeve moves downward in the separation tank, the connecting column uses the plug to block the drain pipe; and when the infusion hose has finished extracting the paint degreasing liquid, the connecting column is moved upward to pull the plug out of the drain pipe, and the drain pipe can now discharge impurities and excess paint degreasing liquid into the collection box; at the same time, since the connecting column is matched with the clearance between the filter hole, the gap between the filter hole and the connecting column can allow the filtered paint degreasing liquid to pass through.

[0017] The present invention is further configured as follows: a stepped surface is provided in the drainage pipe to abut against the lower end surface of the plug.

[0018] By adopting the above technical solution, the stepped surface in the drainage pipe can position the plug to prevent the plug from moving excessively downward in the drainage pipe.

[0019] The present invention is further configured as follows: the cross-sectional outer diameter of the plug is greater than the cross-sectional outer diameter of the connecting column, and a limiting rod for abutting against the upper end of the plug is provided on the inner wall of the lower end of the separation tank.

[0020] By adopting the above technical solution, when the connecting column drives the plug to move upward, the limit rod is used to locate the position of the plug after it moves upward.

[0021] The present invention is further configured as follows: an iron block is provided at the upper end of the connecting column, the piston rod of the lifting cylinder is made of a magnetic material for being attracted to the iron block, a magnetic elimination plate extending in a vertical direction is provided in the pressing sleeve and between the iron block and the lifting cylinder, and gaps are left between the magnetic elimination plate and the iron block, and between the magnetic elimination plate and the lifting cylinder.

[0022] By adopting the above technical solution, when the piston rod of the lifting cylinder drives the pressing sleeve to move downward and filters out the paint degreasing liquid, as the pressing sleeve moves downward until the magnetic plate passes over the iron block, suction is generated between the iron block and the piston rod of the lifting cylinder. However, since the downward movement of the plug is positioned by the stepped surface, the continued downward movement of the pressing sleeve will not drive the connecting column to move downward.

[0023] When the infusion hose has finished extracting the paint degreasing liquid and the plug on the discharge pipe needs to be opened, the lifting cylinder drives the compression sleeve to move upward. Since the iron block is attracted to the piston rod, the lifting cylinder can also drive the connecting column to move upward, so that the plug is pulled out of the discharge pipe. Then the discharge pipe can discharge the impurities and excess paint degreasing liquid into the collection box.

[0024] At the same time, as the connecting column moves upward, when the upper end of the plug hits the limit rod, the connecting column can stop moving upward, and under the suction of the iron block, the plug can keep hitting the limit rod. During the time when the plug hits the limit rod, impurities and excess paint degreasing liquid can be discharged into the collection box.

[0025] As the pressing sleeve continues to move upward, when the magnetic elimination plate moves to the height of the iron block, since there are gaps between the magnetic elimination plate and the iron block, and between the magnetic elimination plate and the lifting cylinder, the magnetic elimination plate can block the magnetic attraction between the iron block and the piston rod. At this time, after losing the suction effect, the connecting column can move downward under its own gravity, so that the plug is embedded in the discharge pipe again, and finally it can facilitate the next feeding in the separation tank.

[0026] The present invention also aims to provide an inspection method for an automobile steering knuckle blank paint degreasing liquid inspection device, which can conveniently measure the concentration of the paint degreasing liquid.

[0027] The above technical purpose of the present invention is achieved through the following technical solutions: an inspection method of a vehicle steering knuckle blank paint degreasing liquid inspection device, comprising the following steps:

[0028] S1: Separating impurities and paint degreasing liquid using a separation component;

[0029] S2: Start the delivery pump to deliver the paint degreasing liquid separated by the separation component into the test cup, and obtain 10 ml of the paint degreasing liquid according to the scale line on the test cup;

[0030] S3: Press the elastic pressure ball on the indicator bottle to drip 2-3 drops of phenolphthalein indicator into the test cup to turn the solution in the test cup red. Then open the burette and titrate with 0.1mol / L HCL standard solution until the red color of the solution just disappears. Read the number of milliliters of HCL standard solution consumed, which is the number of free alkali "points". Then you can calculate the concentration of the paint degreasing solution.

[0031] By adopting the above technical solution, the paint degreasing liquid separated by the separation component is transported into the detection cup, and then the phenolphthalein indicator is dropped into it, so that the color of the paint degreasing liquid solution in the detection cup turns red. The chemical substances in the paint degreasing liquid have alkaline properties, so the HCL standard solution can react with it until the red color just disappears, which means that the paint degreasing liquid is completely consumed, and finally the concentration of the paint degreasing liquid can be calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a structural plan view of the present invention;

[0034] Figure 2 It is a structural cross-sectional view of the separation assembly in the present invention, in which the compression sleeve is located at the upper end of the separation tank and closes the sewage pipe;

[0035] Figure 3 It is a structural cross-sectional view of the separation assembly in the present invention, at this time, the pressing sleeve moves downward in the separation tank, and the paint degreasing liquid enters the pressing sleeve from the gap between the filter hole and the connecting column, and the iron block and the piston rod are in an attraction state;

[0036] Figure 4 It is a structural cross-sectional view of the separation assembly in the present invention. At this time, the compression sleeve moves upward in the separation tank, and the piston rod drives the connecting column upward due to the suction force, so that the plug is pulled out of the discharge pipe, and the plug abuts against the limit rod.

[0037] In the figure, 1. degreasing tank; 11. drain pipe; 2. separation component; 21. separation tank; 211. limit rod; 22. drain pipe; 221. stepped surface; 23. pressing sleeve; 231. magnetic demagnetizing plate; 24. filter hole; 25. collecting box; 26. control part; 261. connecting column; 2611. iron block; 262. plug; 27. lifting cylinder; 3. detection component; 31. detection seat; 32. bracket; 33. detection cup; 34. delivery pump; 35. infusion hose; 36. liquid inlet hose; 37. indicator bottle; 38. elastic pressure ball; 39. indicator tube; 301. burette. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0039] A device for inspecting paint degreasing liquid for automobile steering knuckle blanks, referring to Figure 1 The inspection device for paint degreasing liquid of automobile steering knuckle blank comprises a degreasing tank 1, wherein the degreasing tank 1 is used for degreasing and cleaning the steering knuckle and contains paint degreasing liquid, and the lower end of the degreasing tank 1 is funnel-shaped, and a drain pipe 11 is arranged at the lower end of the degreasing tank 1; at the same time, a separation component 2 for separating impurities and paint degreasing liquid is arranged at one end of the drain pipe 11 away from the degreasing tank 1, and a detection component 3 for detecting the alkalinity of the paint degreasing liquid is also arranged on one side of the separation component 2.

[0040] Reference Figure 1The detection assembly 3 includes a detection seat 31, a bracket 32, a detection cup 33, a delivery pump 34, an infusion hose 35, a liquid inlet hose 36, an indicator bottle 37, an elastic pressure ball 38, an indicator tube 39, and a burette 301, wherein the bracket 32 ​​is fixed to the detection seat 31 by bolts, and the detection cup 33 is placed in the middle of the detection seat 31, and the delivery pump 34 is fixed to the bracket 32 ​​by bolts, and one end of the infusion hose 35 is connected to the inlet end of the delivery pump 34 and the other end is connected to the paint degreasing liquid separated in the separation assembly 2, and the liquid inlet hose 36 is connected to the outlet end of the delivery pump 34 at one end and the other end is connected to the outlet end of the delivery pump 34 at the other end. The end enters the detection cup 33, wherein the indicator bottle 37 is connected to the bracket 32 ​​through a clamp and contains phenolphthalein indicator, and the elastic pressure ball 38 is bonded to the indicator bottle 37, and the indicator tube 39 is arranged at the lower end of the indicator bottle 37 and extends into the detection cup 33, and the phenolphthalein indicator in the indicator bottle 37 can be dripped down along the indicator tube 39 by pressing the elastic pressure ball 38; wherein the burette 301 is connected to the bracket 32 ​​through a clamp, and the burette 301 contains 0.1 mol / L HCL standard solution, and the outer walls of the detection cup 33 and the burette 301 are provided with scale lines.

[0041] Reference Figure 1 , Figure 2 , the separation assembly 2 includes a separation tank 21, a drain pipe 22, a compression sleeve 23, a filter hole 24, a collection box 25, a control member 26 and a lifting cylinder 27, wherein the upper end of the separation tank 21 is connected to the drain pipe 11, and the drain pipe 22 is integrally arranged at the lower end of the separation tank 21, and a stepped surface 221 is integrally arranged in the drain pipe 22; at the same time, the compression sleeve 23 is embedded in the separation tank 21, and the filter hole 24 is opened at the center of the lower end of the compression sleeve 23, and the filter hole 24 can allow the paint degreasing liquid to enter the compression sleeve 23, wherein the collection box 25 is located below the drain pipe 22, and the control member 26 is arranged at the drain pipe 22. The control part 26 is on the discharge pipe 22 and is used to control the discharge of the discharge pipe 22. The control part 26 includes a connecting column 261 and a plug 262. The connecting column 261 is arranged at the center of the separation tank 21 and passes through the filter hole 24, and the connecting column 261 and the filter hole 24 are clearance-matched. At the same time, the plug 262 is integrally arranged at the lower end of the connecting column 261, and the plug 262 is embedded in the discharge pipe 22 and the lower end face abuts on the stepped surface 221, and the cross-sectional outer diameter of the plug 262 is larger than the cross-sectional outer diameter of the connecting column 261, wherein a limiting rod 211 for abutting against the upper end of the plug 262 is welded on the inner wall of the lower end of the separation tank 21.

[0042] Reference Figure 1 , Figure 2The lifting cylinder 27 is fixed to the external wall at the upper end and connected to the inner wall of the pressing sleeve 23 at the lower end by bolts, wherein an iron block 2611 is fixed to the upper end of the connecting column 261 by bolts, and the piston rod of the lifting cylinder 27 is made of iron material for being attracted to the iron block 2611, and at the same time, a demagnetizing plate 231 extending in the vertical direction is bonded in the pressing sleeve 23 and between the iron block 2611 and the lifting cylinder 27, and there are gaps between the demagnetizing plate 231 and the iron block 2611, and between the demagnetizing plate 231 and the lifting cylinder 27. According to common knowledge, the iron plate can shield magnetic force like a shield, because the material structure of iron makes its ability to absorb and distribute magnetic fields better than other materials; wherein the end of the infusion hose 35 away from the delivery pump 34 is connected to the inner wall of the pressing sleeve 23 by bolts and extends into the lower end of the pressing sleeve 23.

[0043] An inspection method for a paint degreasing liquid inspection device for a car steering knuckle blank comprises the following steps:

[0044] S1: Separating impurities and paint degreasing liquid by using separation component 2;

[0045] S2: Start the delivery pump 34 to deliver the paint degreasing liquid separated by the separation component 2 into the detection cup 33, and obtain the paint degreasing liquid of standard 10 ml according to the scale line on the detection cup 33;

[0046] S3: Press the elastic pressure ball 38 on the indicator bottle 37 to drip 2-3 drops of phenolphthalein indicator into the detection cup 33 to make the solution in the detection cup 33 turn red. Then open the burette 301 and titrate with 0.1 mol / L HCL standard solution until the red color of the solution just disappears. The number of milliliters of HCL standard solution consumed is the number of free alkali "points", and then the concentration of the paint degreasing solution can be calculated.

[0047] Principle: Since the paint degreasing liquid in the degreasing tank 1 is used to clean the steering knuckle, more impurities are deposited in the lower end of the degreasing tank 1, and these deposited impurities can be discharged using the sewage pipe 11, and at the same time, a part of the paint degreasing liquid is mixed in the discharged impurities.

[0048] Therefore, when measuring the solution concentration of the paint degreasing liquid in the degreasing tank 1, the piston rod of the lifting cylinder 27 is first used to drive the pressing sleeve 23 to move upward, so that the pressing sleeve 23 moves to the top of the sewage pipe 11, and the sewage pipe 11 can discharge impurities and paint degreasing liquid into the separation tank 21; then the piston rod of the lifting cylinder 27 is used to drive the pressing sleeve 23 to move downward, and the paint degreasing liquid can be filtered out in the gap between the connecting column 261 and the filter hole 24, so that the paint degreasing liquid enters the pressing sleeve 23; then the paint degreasing liquid in the pressing sleeve 23 can be transported through the delivery pump 34, the delivery hose and the liquid inlet hose 36 The paint degreasing liquid is sent to the detection cup 33, wherein the paint degreasing liquid entering the detection cup 33 is controlled to be 10 ml, and then the elastic pressure ball 38 on the indicator bottle 37 is pressed, so that 2-3 drops of phenolphthalein indicator are dripped into the detection cup 33 to make the solution in the detection cup 33 turn red, and then the burette 301 is opened, and 0.1 mol / L HCL standard solution is titrated until the red color of the solution just disappears, and the milliliters of the consumed HCL standard solution are read as the number of free alkali "points", and then the solution concentration of the paint degreasing liquid can be calculated, and finally the solution concentration of the paint degreasing liquid can be conveniently measured.

[0049] As the pressing sleeve 23 moves downward until the magnetic demagnetizing plate 212 passes over the iron block 2611, suction will be generated between the iron block 2611 and the piston rod of the lifting cylinder 27. However, since the plug 262 moves downward and is positioned by the step surface 221, the continued downward movement of the pressing sleeve 23 will not drive the connecting column 261 to move downward; and when the infusion hose 35 has extracted the paint degreasing liquid and the plug 262 on the discharge pipe 22 needs to be opened, the lifting cylinder 27 drives the pressing sleeve 23 to move upward. Since the iron block 2611 is attracted to the piston rod, the lifting cylinder 27 can also drive the connecting column 261 to move upward, so that the plug 262 is pulled out of the discharge pipe 22, and then the discharge pipe 22 can discharge impurities and excess paint degreasing liquid into the collection box 25.

[0050] At the same time, as the connecting column 261 moves upward, when the upper end of the plug 262 abuts against the limit rod 211, the connecting column 261 can stop moving upward, and under the suction of the iron block 2611, the plug 262 can maintain the state of abutting against the limit rod 211. During the duration that the plug 262 abuts against the limit rod 211, impurities and excess paint degreasing liquid can be discharged into the collection box 25.

[0051] As the pressing sleeve 23 continues to move upward, when the magnetic demagnetizing plate 212 moves to the height of the iron block 2611, since there are gaps between the magnetic demagnetizing plate 212 and the iron block 2611, and between the magnetic demagnetizing plate 212 and the lifting cylinder 27, the magnetic demagnetizing plate 212 can block the magnetic attraction between the iron block 2611 and the piston rod. At this time, after losing the attraction, the connecting column 261 can move downward under the action of its own gravity, so that the plug 262 is embedded in the discharge pipe 22 again, and finally the next feeding in the separation tank 21 and the next concentration measurement of the paint degreasing liquid can be facilitated.

[0052] Finally, the concentration of the paint degreasing liquid in the degreasing tank 1 can be measured at intervals and at regular intervals, and a portion of the impurities accumulated at the bottom of the degreasing tank 1 can be discharged while the concentration is measured, so that the paint degreasing liquid remaining in the impurities can be reasonably utilized while the impurities are discharged.

Claims

1. An inspection device for paint degreasing liquid of automobile steering knuckle blank, characterized by: The invention comprises a degreasing tank (1) for degreasing a steering knuckle and containing a paint degreasing liquid inside, wherein a drain pipe (11) is arranged at the lower end of the degreasing tank (1), and a separation component (2) for separating impurities and the paint degreasing liquid is arranged at one end of the drain pipe (11) away from the degreasing tank (1), and a detection component (3) for detecting the alkalinity of the paint degreasing liquid is arranged on one side of the separation component (2), wherein the detection component (3) comprises a detection seat (31), a bracket (32) located on the detection seat (31), a detection cup (33) placed on the detection seat (31), a delivery pump (34) arranged on the bracket (32) and located above the detection cup (33), and a delivery pump (34) having one end connected to the inlet end of the delivery pump (34). A liquid infusion hose (35) having one end connected to the paint degreasing liquid separated in the separation component (2) and the other end connected to the paint degreasing liquid separated in the separation component (2); a liquid inlet hose (36) having one end connected to the outlet end of the delivery pump (34) and the other end entering the detection cup (33); an indicator bottle (37) arranged on the bracket (32) and containing a phenolphthalein indicator; an elastic pressure ball (38) arranged at the upper end of the indicator bottle (37); an indicator tube (39) arranged at the lower end of the indicator bottle (37) and extending into the detection cup (33); and a burette (301) arranged on the bracket (32) and containing a 0.1 mol / L HCL standard solution; and scale lines are arranged on the outer walls of the detection cup (33) and the burette (301).

2. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 1 is characterized in that: The separation assembly (2) comprises a separation tank (21) whose upper end is connected to a sewage discharge pipe (11), a discharge pipe (22) arranged at the lower end of the separation tank (21), a compression sleeve (23) embedded in the separation tank (21), a filter hole (24) opened in the lower end of the compression sleeve (23) and allowing paint degreasing liquid to enter the compression sleeve (23), a collection box (25) located below the discharge pipe (22), and a control member (26) arranged on the discharge pipe (22) and used to control the discharge of the discharge pipe (22); and the end of the infusion hose (35) away from the delivery pump (34) is connected to the inner wall of the compression sleeve (23) and extends into the lower end of the compression sleeve (23).

3. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 2 is characterized in that: The separation assembly (2) further comprises a lifting cylinder (27) whose upper end is fixed to the external wall surface and whose lower end is connected to the inner wall of the pressing sleeve (23).

4. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 3 is characterized in that: The control member (26) comprises a connecting column (261) arranged at the center of the separation tank (21) and passing through the filter hole (24), and a plug (262) arranged at the lower end of the connecting column (261) and embedded in the discharge pipe (22), and the connecting column (261) and the filter hole (24) are clearance-fitted.

5. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 4 is characterized in that: The drainage pipe (22) is provided with a stepped surface (221) which abuts against the lower end surface of the plug (262).

6. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 5, characterized in that: The cross-sectional outer diameter of the plug (262) is greater than the cross-sectional outer diameter of the connecting column (261), and a limiting rod (211) for contacting the upper end of the plug (262) is provided on the inner wall of the lower end of the separation tank (21).

7. The inspection device for paint degreasing liquid of automobile steering knuckle blank according to claim 6, characterized in that: An iron block (2611) is arranged at the upper end of the connecting column (261); the piston rod of the lifting cylinder (27) is made of a magnetic material for being attracted to the iron block (2611); a magnet-eliminating plate (231) extending in a vertical direction is arranged in the pressing sleeve (23) and between the iron block (2611) and the lifting cylinder (27); and gaps are left between the magnet-eliminating plate (231) and the iron block (2611), and between the magnet-eliminating plate (231) and the lifting cylinder (27).

8. The inspection method of the automobile steering knuckle blank paint degreasing liquid inspection device according to claim 1 is characterized in that: The steps include: S1: Separating impurities and paint degreasing liquid using a separation component (2); S2: starting the delivery pump (34) to deliver the paint degreasing liquid separated by the separation component (2) into the detection cup (33), and obtaining a standard 10 ml of paint degreasing liquid according to the scale line on the detection cup (33); S3: Press the elastic pressure ball (38) on the indicator bottle (37) to drip 2-3 drops of phenolphthalein indicator into the detection cup (33) to make the solution in the detection cup (33) turn red. Then open the burette (301) and titrate with 0.1 mol / L HCL standard solution until the red color of the solution just disappears. The number of milliliters of HCL standard solution consumed is the number of free alkali "points", and then the concentration of the paint degreasing solution can be calculated.

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