Gearbox shell air tightness detection device

Abstract

The invention discloses a gearbox shell airtightness detection device, and relates to the technical field of automobile part detection, the gearbox shell airtightness detection device comprises an operation table, the operation table is divided into an upper layer and a lower layer, two electric sliding rails are fixedly installed on the upper layer of the operation table, and two sealing shells are installed between the two electric sliding rails and the operation table through adjusting structures; the two sealing shells are symmetrically arranged, a gearbox is jointly installed in the two sealing shells in a clamped mode, and an oxygen filling structure used in cooperation with the gearbox and an argon filling structure used in cooperation with the two sealing shells are installed on the operation table. The gearbox leakage point detection device has the advantages that the gearbox is sealed in a relatively small space for a vacuum simulation experiment, the use amount of argon is reduced, the existence position of a gearbox leakage point is accurately observed and the leakage point is rapidly positioned by using an oxidation discoloration test of iron ions, and the accuracy and the detection speed of gearbox leakage point detection are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts detection, and in particular to a gearbox housing air tightness detection device. Background Art

[0002] The gearbox is an important part of the vehicle's power transmission system. The inside of the gearbox is filled with liquid (usually gearbox oil or hydraulic oil). If the airtightness of the gearbox is not good, liquid leakage may occur, which will not only damage the internal parts of the gearbox, but may also leave oil stains on the vehicle chassis or other parts, affecting the vehicle's performance and environment. Therefore, it is crucial to conduct strict testing of the sealing of the gearbox during the production process.

[0003] The airtightness tester can simulate the working environment inside the gearbox by applying a certain pressure or vacuum, and monitor the changes in pressure or vacuum to evaluate the sealing performance of the gearbox. During the test, the gearbox is placed in the test chamber of the airtightness tester, and then the pressure in the test chamber is changed by pressurizing or vacuuming. By monitoring the changes in the pressure in the test chamber, it can be determined whether the gearbox has leakage or poor sealing. However, the pressure gauge has a certain degree of accuracy during the test process, for example, the test result can only be accurate to 0.1, so the 4Fe 2+ +O2+4H + =4Fe 3+ +2H2O, the light green turns into brown-yellow to carry out auxiliary detection of air tightness, which can effectively improve the leakage efficiency of the gearbox and detect the location of the gearbox leakage point. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a gearbox casing air tightness detection device, which solves the problem that the location of the leakage point cannot be detected as mentioned in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A gearbox housing air tightness detection device comprises an operating table, the operating table is divided into an upper and lower layer, two electric slide rails are fixedly installed on the upper layer of the operating table, two sealing shells are installed between the two electric slide rails and the operating table through an adjustment structure, and the two sealing shells are symmetrically arranged, a gearbox is installed in the two sealing shells, and an oxygen filling structure used in conjunction with the gearbox and an argon filling structure used in conjunction with the two sealing shells are installed on the operating table; Slide grooves are provided on both sides of the two sealed shells, a sealing shielding structure is installed between the two slide grooves in the two sealed shells, a ferrous sulfate solution tank is fixedly installed in the two sealed shells, and a detection structure for use with the gearbox is installed between the two ferrous sulfate solution tanks and the corresponding sealed shells.

[0006] Furthermore, observation windows are provided on both sides of the operating table, a lighting lamp is fixedly installed on the top of the operating table, and a control computer is fixedly installed on the upper layer of the operating table.

[0007] Furthermore, the adjustment structure includes a slide plate slidably mounted on two electric slide rails, and one of the sealing shells is fixedly mounted on the slide plate, a mounting side panel is fixedly mounted on the upper layer of the operating table, a bracket is fixedly mounted on one side of the mounting side panel, two electric push rods are fixedly mounted on the lower surface of the bracket, and another sealing shell is fixedly mounted on the driving ends of the two electric push rods.

[0008] Furthermore, two sealing rubber pads are fixedly mounted on the adjacent sides of the two sealing shells, and the two sealing shells are in a sealed state when connected.

[0009] Furthermore, the oxygen-filled structure includes grooves opened on two sealed shells, a ventilation pipe is commonly mounted between the two grooves, and the ventilation pipe is fixedly mounted in the groove below, a pressure pipe is mounted between the two sealed shells, and the pressure pipe is fixed on the sealed shell below, the upper end of the pressure pipe extends to the outside of the two sealed shells and a pressure gauge is fixedly mounted thereon, and one end of the ventilation pipe and the pressure pipe located in the sealed shell is in a sealed connection with the gearbox, and an oxygen supply mechanism is installed on the lower layer of the operating table.

[0010] Furthermore, the oxygen supply mechanism includes an oxygen cylinder fixedly installed on the lower layer of the operating table, the oxygen cylinder is fixedly connected with a connecting pipe, and the connecting pipe passes through the operating table and is fixedly connected with the ventilation pipe, the oxygen cylinder is provided with a solenoid valve, and the solenoid valve is electrically connected to the control computer.

[0011] Furthermore, the argon filling structure includes gas pipes fixedly connected to two sealed shells respectively, an argon tank is fixedly connected between the two gas pipes, and the argon tank is fixedly installed on the operating table, a valve is provided on the argon tank, and an exhaust port is opened on one side of the sealed shell below, and a sealing plug is sealed in the exhaust port.

[0012] Furthermore, the sealing shielding structure includes a motor slot and two gear slots opened on both sides of the sealing shell, and the motor slot, the slide slot and the corresponding two gear slots are connected. Motors are fixedly installed in the two motor slots, and the motors are electrically connected to the control computer. The driving ends of the two motors are fixedly installed with rotating shafts, and two spur gears are fixedly installed on the rotating shafts, and the two spur gears rotate in the corresponding gear slots respectively. Sealing plates are sealed and slid in the two gear slots, and two tooth plates are fixedly installed on the lower surfaces of the two sealing plates, and the tooth plates are respectively meshed with the corresponding spur gears.

[0013] Furthermore, a sealing groove is provided on one side of the two sealing plates that are close to each other, and a sealing rubber belt is fixedly installed in the two sealing grooves.

[0014] Further, the detection structure includes a plurality of electric telescopic rods 1, a plurality of electric telescopic rods 2 and a plurality of electric telescopic rods 3 fixedly mounted on the bottom of the sealed shell, the driving ends of the plurality of electric telescopic rods 1 are commonly fixedly mounted with a rectangular atomizing spray plate, the driving ends of the corresponding two electric telescopic rods 2 are commonly fixedly mounted with a U-shaped atomizing spray plate 2, the driving ends of the corresponding two electric telescopic rods 3 are commonly fixedly mounted with a U-shaped atomizing spray plate 1, the upper surface of the U-shaped atomizing spray plate 1, the rectangular atomizing spray plate and the U-shaped atomizing spray plate 2 The surfaces are all provided with liquid outlet holes, the upper surfaces of the U-shaped atomizing spray plate 1, the rectangular atomizing spray plate and the U-shaped atomizing spray plate 2 are all fixedly installed with liquid absorbing cloths, the ferrous sulfate solution tank is fixedly installed with a pump, and the pump is electrically connected to the control computer, the pump is fixedly connected with two pipes, the upper ends of the two pipes have two upper ports, one of the upper ports on each of the pipes is fixedly connected with the corresponding U-shaped atomizing spray plate 2, and the other upper port on each of the pipes is fixedly connected with the corresponding U-shaped atomizing spray plate 1.

[0015] Compared with the prior art, the present invention has the following advantages: 1: This testing equipment has the advantages of ensuring internal sealing and improving detection accuracy when testing the air tightness of the gearbox. Through the setting of two sealing shells, the relative sealing of the gearbox detection can be guaranteed, and the space required to maintain the vacuum state is small, which can reduce the amount of argon gas used, ensure the sealing of the two sealing shells on the gearbox, and improve the accuracy and speed of subsequent leakage point detection.

[0016] 2: This testing equipment has the advantage of detecting the location of leakage points when testing the air tightness of the gearbox. The shape settings of the U-shaped atomizing spray plate 1, the rectangular atomizing spray plate and the U-shaped atomizing spray plate 2 can improve the fit between the absorbent cloth and the gearbox. At the same time, the color change after the oxidation of iron ions can be used to effectively observe the location of the gearbox leakage point and quickly locate the leakage point.

[0017] In summary, the present invention seals the gearbox in a relatively small space to conduct a vacuum simulation experiment, reduces the use of argon gas, and uses the oxidation discoloration test of iron ions to accurately observe the existence position of the gearbox leakage point, quickly locate the leakage point, and improve the accuracy and speed of gearbox leakage point detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a gearbox housing air tightness detection device proposed by the present invention; Figure 2 It is a schematic diagram of the structure inside the operating table; Figure 3 It is a schematic diagram of the structure of the vent pipe and the gearbox; Figure 4 for Figure 3 A top view of the structure in the middle; Figure 5 for Figure 4 Structural cross-section view in the AA direction; Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure; Figure 7 It is a structural schematic diagram of the slideway and the gear groove; Figure 8 It is a structural diagram of spur gear and motor; Fig. 9 It is a schematic diagram of the structure of a rectangular atomizing spray plate and a U-shaped atomizing spray plate 2.

[0019] In the figure: 1. operating table; 2. observation window; 3. lighting; 4. control computer; 5. oxygen cylinder; 6. solenoid valve; 7. pressure gauge; 8. electric slide rail; 9. electric push rod; 10. bracket; 11. argon tank; 12. slide plate; 13. sealing shell; 14. ventilation pipe; 15. gearbox; 16. groove; 17. exhaust port; 18. sealing rubber pad; 19. ferrous sulfate solution tank; 20. pump; 21. electric telescopic rod 1; 22. spur gear; 23. U-shaped atomizing spray plate 1; 24. sealing plate; 25. motor; 26. U-shaped atomizing spray plate 2; 27. liquid absorbing cloth; 28. tooth plate; 29. ​​slide groove; 30. gear groove; 31. sealing groove; 32. rectangular atomizing spray plate. DETAILED DESCRIPTION

[0020] Reference Figure 1-Figure 3A gearbox housing air tightness detection device includes an operating table 1, observation windows 2 are arranged on both sides of the operating table 1, and the observation windows 2 can observe the operation conditions inside the operating table 1. The front side of the operating table 1 is a rotatable cabinet door, and the operating table 1 is divided into an upper and lower layer. A control computer 4 is fixedly installed on the left side of the upper layer of the operating table 1, and an installation side panel and two electric slide rails 8 are fixedly installed on the right side of the upper layer of the operating table 1, and the installation side panel is located between the two electric slide rails 8. A lighting lamp 3 is fixedly installed on the top of the operating table 1, and the lighting lamp 3 can better observe the internal detection conditions.

[0021] A bracket 10 is fixedly installed on one side of the side panel, a slide plate 12 is slidably installed between the two electric slide rails 8, a sealing shell 13 is fixedly installed on the slide plate 12, two electric push rods 9 are fixedly installed on the lower surface of the bracket 10, the driving ends of the two electric push rods 9 and the upper surface of the slide plate 12 are fixedly installed with sealing shells 13, and the two sealing shells 13 are symmetrically arranged, and the sides close to each other are opened, and the internal structures of the two sealing shells 13 are the same.

[0022] A gearbox 15 is mounted in the two sealed shells 13, and the supporting point of the gearbox 15 is located on the lower sealed shell 13. In the initial state, the two sealed shells 13 are in a separated state. After the gearbox 15 is locked and placed inside the lower sealed shell 13, the slide plate 12 is controlled by the control computer 4 to slide on the two electric slide rails 8, so that the slide plate 12 drives the lower sealed shell 13 to move to just below the upper sealed shell 13. At this time, the driving ends of the two electric push rods 9 are driven to extend to drive the upper sealed shell 13 to engage with the lower sealed shell 13, thereby realizing the engagement and sealing of the two sealed shells 13 to the gearbox 15.

[0023] Two sealing rubber pads 18 are fixedly arranged on the side where the two sealing shells 13 are close to each other, and rubber pads are arranged at the positions where the two sealing shells 13 are clamped and installed with the gearbox 15. The arrangement of the two sealing rubber pads 18 and the rubber pads can enhance the sealing between the two sealing shells 13; grooves 16 are opened on the two sealing shells 13, and a vent pipe 14 is clamped and installed between the two grooves 16, and the vent pipe 14 is fixedly clamped in the groove 16 below. A pressure pipe is also clamped and installed between the two sealing shells 13, and the pressure pipe is fixed at the bottom. On the sealing shell 13, the upper end of the pressure tube extends to the outside of the two sealing shells 13 and is fixedly installed with a pressure gauge 7. The ventilation pipe 14 and one end of the pressure tube located in the sealing shell 13 are both provided with a plastic sealing ring or a rubber ring, and the gearbox 15 is provided with two air inlet holes (the existing setting on the gearbox 15). The ventilation pipe 14 and one end of the pressure tube located in the sealing shell 13 are both in a sealed connection with the two air inlet holes on the gearbox 15. The setting of the plastic sealing ring or the rubber ring makes the ventilation pipe 14, the pressure tube and the gearbox 15 in a more sealed state.

[0024] An oxygen cylinder 5 is fixedly installed on the lower layer of the operating table 1. A connecting pipe is fixedly connected to the oxygen cylinder 5, and the connecting pipe runs through the operating table 1 and is fixedly connected to the ventilation pipe 14. A solenoid valve 6 is arranged at the position where the connecting pipe is connected to the oxygen cylinder 5. The solenoid valve 6 is opened by controlling the computer 4 to control the oxygen in the oxygen cylinder 5 to be injected into the gearbox 15 through the connecting pipe and the ventilation pipe 14 in sequence, and the data changes on the pressure gauge 7 are observed. After a certain pressure of oxygen is filled into the gearbox 15, the solenoid valve 6 is closed and left for a period of time, and then the pressure gauge 7 is used to observe whether there is a change in the internal pressure of the gearbox 15 (the assembly input pressure is 0-50kpa, and the leakage rate is 30-50cc / min for a qualified state. The total volume of the gearbox 15 in this device is 6.606L. The airtightness detection parameters are initially determined as follows: the inflation pressure is 25kPa, the inflation time is 5s, the air pressure balance + detection time is 20s, and the pressure drop during the test is ≤16Pa. The leakage is then recorded by the pressure gauge 7. The leakage within 30-50cc / min meets the technical requirements).

[0025] Gas pipes are fixedly connected between the two sealed shells 13 and the mounting side plates, respectively. An argon gas tank 11 is fixedly connected between the two gas pipes. The argon gas tank 11 is fixedly installed on the operating table 1. A valve is arranged on the argon gas tank 11. An exhaust port 17 is arranged on one side of the lower sealed shell 13. A sealing plug is mounted in the exhaust port 17. The valve on the argon gas tank 11 is opened to allow argon gas to enter the two sealed shells 13 through the two gas pipes. At the same time, the sealing plug in the exhaust port 17 is opened to discharge the air in the sealed shell 13 to prevent the oxygen contained in the air in the sealed shell 13 from interfering with the detection. After the argon gas is introduced for a period of time, the sealing plug is engaged in the exhaust port 17 (the exhaust port 17 is closed). After waiting for a period of time (to prevent a small amount of air from still being contained in the two sealed shells 13), the valve of the argon gas tank 11 is closed.

[0026] Reference Figure 4-Figure 9 , both sides of the sealing shell 13 are provided with a slide groove 29 and two gear grooves 30, and the two gear grooves 30 are connected with the corresponding slide grooves 29, each slide groove 29 is sealed and slid with a sealing plate 24, and the two sealing plates 24 are also sealed and slid in the sealing shell 13, and the adjacent parts of the two sealing plates 24 are provided with a sealing groove 31, and the two sealing grooves 31 are fixedly installed with a sealing rubber belt. In the initial state, the two sealing plates 24 are in a sealed state (the two sealing rubber belts are attached to each other), and the sealing plates 24 in the two sealing shells 13 slide on the upper and lower sides of the gearbox 15 respectively.

[0027] Motor slots are respectively provided on both sides of the sealing shell 13, and the motor slots are connected to the corresponding slide slots 29. Motors 25 are fixedly installed in the motor slots. A rotating shaft is fixedly installed at the driving end of the motor 25. Two spur gears 22 are fixedly installed on the rotating shaft, and the two spur gears 22 rotate in the corresponding gear slots 30 respectively. Two tooth plates 28 are fixedly installed on the lower surface of each sealing plate 24, and the tooth plates 28 are respectively meshed with the corresponding spur gears 22.

[0028] By controlling the computer 4, the driving ends of the motors 25 on both sides of the same sealing shell 13 can be controlled to rotate in opposite directions, thereby driving the two spur gears 22 on both sides to rotate in opposite directions, and driving the corresponding two sealing plates 24 to slide away from each other in the slide groove 29 through the toothed plate 28, until the sealing plates 24 are driven to move to a position not directly below the gearbox 15 (the sealing plates 24 do not block the gearbox 15).

[0029] The bottom of the sealed shell 13 is fixedly installed with a ferrous sulfate solution tank 19, multiple electric telescopic rods 1 21, multiple electric telescopic rods 2 and multiple electric telescopic rods 3. The driving ends of the multiple electric telescopic rods 1 21 are fixedly installed with a rectangular atomizing spray plate 32. The driving ends of the corresponding two electric telescopic rods 2 are fixedly installed with a U-shaped atomizing spray plate 26. The two U-shaped atomizing spray plates 26 are respectively located on both sides of the rectangular atomizing spray plate 32. The driving ends of the corresponding two electric telescopic rods 3 are fixedly installed with a U-shaped atomizing spray plate 23. The two U-shaped atomizing spray plates 26 are respectively located on both sides of the rectangular atomizing spray plate 32. 3 are respectively located on both sides of the two U-shaped atomizing spray plates 26, the U-shaped atomizing spray plate 1 23, the rectangular atomizing spray plate 32 and the U-shaped atomizing spray plate 26 are all hollow and have a plurality of evenly distributed liquid outlet holes on their upper surfaces, and the upper surfaces of the U-shaped atomizing spray plate 1 23, the rectangular atomizing spray plate 32 and the U-shaped atomizing spray plate 26 are all fixedly mounted with liquid absorbing cloth 27, and the shapes of the U-shaped atomizing spray plate 1 23, the rectangular atomizing spray plate 32 and the U-shaped atomizing spray plate 26 are all fitted according to the shape of the gearbox 15, so as to ensure the fit between the liquid absorbing cloth 27 and the gearbox 15.

[0030] A pump 20 is fixedly installed on the ferrous sulfate solution tank 19, and two pipes are fixedly connected on the pump 20. The upper ends of the two pipes have two upper ports, one of the upper ports on each pipe is fixedly connected to the U-shaped atomizing spray plate 26, and the other upper port on each pipe is fixedly connected to the U-shaped atomizing spray plate 1 23.

[0031] The pump 20 is started by controlling the computer 4, so that the ferrous sulfate solution in the ferrous sulfate solution tank 19 is transported to the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26 and the rectangular atomizing spray plate 32 through the pipeline, and the ferrous sulfate solution is contaminated on the upper liquid-absorbing cloth 27 through the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26 and the rectangular atomizing spray plate 32, and then the driving ends of the electric telescopic rod 1 21, the electric telescopic rod 2 and the electric telescopic rod 3 are controlled to extend, so as to push the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26 and the rectangular atomizing spray plate 32 to move the ferrous sulfate solution to the liquid-absorbing cloth 27. The rectangular atomizing spray plate 32 makes the absorbent cloth 27 sprayed with ferrous sulfate solution contact with the gearbox 15 and leave it for a while, then start the electric telescopic rod 1 21, the electric telescopic rod 2 and the electric telescopic rod 3 to pull the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 2 26, and the rectangular atomizing spray plate 32 to separate from the gearbox 15, then start the motor 25 to re-engage the two sealing plates 24, start the electric push rod 9 to separate the upper sealing shell 13 from the lower sealing shell 13, take out the gearbox 15, and then take out the absorbent cloth 27.

[0032] Take advantage of 4Fe 2+ +O2+4H + =4Fe 3+ +2H2O reddish brown turns to brownish yellow, check whether there is any area with color change (from light green to brownish yellow) on the absorbent cloth 27, especially check around the possible leakage point. If there is an area with color change, then these areas may be gas leakage points of the gearbox 15 (the absorbent cloth 27 is used for detection because the pressure accuracy detected by the pressure gauge 7 is limited, and other methods are used for re-detection to ensure that there is no gas leakage in the gearbox 15).

[0033] The specific operation steps of this device are as follows: Start the control computer 4, control the slide plate 12 to slide on the electric slide rail 8 through the control computer 4, place the gearbox 15 in the sealing shell 13 below, then move the gearbox 15 and the sealing shell 13 below to just below the electric push rod 9 through the slide plate 12, start the electric push rod 9, and make the electric push rod 9 push the sealing shell 13 above to engage with the sealing shell 13 on the slide plate 12; Exhaust the air inside the two sealed shells 13: open the valve on the argon tank 11 to allow the argon gas to enter the sealed shell 13 through the gas pipe. At the same time, open the exhaust port 17 to exhaust the air inside the sealed shell 13. After passing the argon gas for a period of time, close the exhaust port 17, wait for a period of time, and then close the valve on the argon tank 11; Spraying fabric: The ferrous sulfate solution tank 19 is pre-mixed with an appropriate acidic regulator (such as dilute hydrochloric acid, dilute sulfuric acid, etc.) to stabilize the divalent iron ions and provide sufficient hydrogen ions for the chemical reaction, promoting the smooth generation of trivalent iron ions. The color of trivalent iron ions in aqueous solution depends on the pH value, concentration, and the presence of other ions. For example, when the pH is <1, the trivalent iron ions mainly exist in the form of lavender hexahydrate iron ions. However, when the pH value rises to 2-3, the solution will appear yellow-brown due to hydrolysis. When the pH value is increased, the color of the solution changes to reddish brown, and finally forms a reddish brown iron hydroxide precipitate, which is obviously different from the light green color of the stable ferrous sulfate solution under acidic conditions; the pump 20 is started to transport the ferrous sulfate solution in the ferrous sulfate solution tank 19 to the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26 and the rectangular atomizing spray plate 32 through the pipeline, and the ferrous sulfate solution is stained on the upper liquid absorption cloth 27 through the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26 and the rectangular atomizing spray plate 32; Determine whether there is leakage inside the gearbox 15 by using the pressure gauge 7: control the solenoid valve 6 to open by the control computer 4, and the oxygen in the oxygen cylinder 5 enters the gearbox 15 through the ventilation pipe 14, and observe the data changes on the pressure gauge 7. After a certain pressure of oxygen is filled into the gearbox 15, close the solenoid valve 6, leave it for a while, and then observe whether the internal pressure of the gearbox 15 changes through the pressure gauge 7; Detect the leakage point: start the motor 25, the motor 25 drives the spur gear 22 to rotate through the rotating shaft, and the spur gear 22 drives the sealing plate 24 to move through the tooth plate 28. When the sealing plates 24 on both sides move into the slide groove 29, the driving ends of the electric telescopic rod 1 21, the electric telescopic rod 2 and the electric telescopic rod 3 are controlled to extend, so that the electric telescopic rod 1 21, the electric telescopic rod 2 and the electric telescopic rod 3 push the rectangular atomizing spray plate 32, the U-shaped atomizing spray plate 2 26 and the U-shaped atomizing spray plate 1 respectively. 23 makes the absorbent cloth 27 sprayed with ferrous sulfate solution contact with the gearbox 15 and leave it for a while, then starts the electric telescopic rod 1 21, the electric telescopic rod 1 21 pulls the U-shaped atomizing spray plate 1 23, the U-shaped atomizing spray plate 26, and the rectangular atomizing spray plate 32 to separate from the gearbox 15, then starts the motor 25 to re-engage the two sealing plates 24, starts the electric push rod 9 to separate the upper sealing shell 13 from the lower sealing shell 13, and takes out the gearbox 15, and then takes out the absorbent cloth 27; Inspection results: Check whether there are areas with color changes on the absorbent cloth 27, especially around possible leakage points. If there are areas with color changes, then these areas may be gas leakage points of the device; at the same time, when there is no obvious change in the pressure in the gearbox 15, start the electric push rod 9 to separate the upper sealing shell 13 from the lower sealing shell 13, and take out the gearbox 15 to release the gas in the gearbox 15.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A gearbox housing air tightness detection device, comprising an operating table (1), characterized in that: The operating table (1) is divided into two layers, an upper layer and an lower layer. Two electric slide rails (8) are fixedly installed on the upper layer of the operating table (1). Two sealed shells (13) are installed between the two electric slide rails (8) and the operating table (1) through an adjustment structure. The two sealed shells (13) are symmetrically arranged. A gearbox (15) is installed in the two sealed shells (13). An oxygen filling structure used in conjunction with the gearbox (15) and an argon filling structure used in conjunction with the two sealed shells (13) are installed on the operating table (1); Slide grooves (29) are provided on both sides of the two sealed shells (13), a sealing shielding structure is installed between the two slide grooves (29) in the two sealed shells (13), a ferrous sulfate solution tank is fixedly installed in the two sealed shells (13), and a detection structure used in conjunction with the gearbox (15) is installed between the two ferrous sulfate solution tanks and the corresponding sealed shells (13).

2. The gearbox housing air tightness detection device according to claim 1, characterized in that: Observation windows (2) are provided on both sides of the operating table (1), a lighting lamp (3) is fixedly installed on the top of the operating table (1), and a control computer (4) is fixedly installed on the upper layer of the operating table (1).

3. The gearbox housing air tightness detection device according to claim 1, characterized in that: The adjustment structure includes a slide plate (12) slidably mounted on two electric slide rails (8), and one of the sealing shells (13) is fixedly mounted on the slide plate (12); a mounting side plate is fixedly mounted on the upper layer of the operating table (1); a bracket (10) is fixedly mounted on one side of the mounting side plate; two electric push rods (9) are fixedly mounted on the lower surface of the bracket (10), and another sealing shell (13) is fixedly mounted on the driving ends of the two electric push rods (9).

4. The gearbox housing air tightness detection device according to claim 1, characterized in that: Two sealing rubber pads (18) are fixedly mounted on the adjacent sides of the two sealing shells (13), and the two sealing shells (13) are in a sealed state when connected.

5. The gearbox housing air tightness detection device according to claim 2, characterized in that: The oxygen filling structure includes grooves (16) provided on two sealed shells (13), a ventilation pipe (14) is mounted between the two grooves (16), and the ventilation pipe (14) is fixedly mounted in the lower groove (16), a pressure pipe is mounted between the two sealed shells (13), and the pressure pipe is fixed on the lower sealed shell (13), the upper end of the pressure pipe extends to the outside of the two sealed shells (13) and is fixedly mounted with a pressure gauge (7), and the ventilation pipe (14) and one end of the pressure pipe located in the sealed shell (13) are in a sealed communication state with the gearbox (15), and an oxygen supply mechanism is mounted on the lower layer of the operating table (1).

6. The gearbox housing air tightness detection device according to claim 5, characterized in that: The oxygen supply mechanism includes an oxygen cylinder (5) fixedly mounted on the lower layer of the operating table (1), a connecting pipe fixedly connected to the oxygen cylinder (5), and the connecting pipe passes through the operating table (1) and is fixedly connected to the ventilation pipe (14), and a solenoid valve (6) is provided on the oxygen cylinder (5), and the solenoid valve (6) is electrically connected to the control computer (4).

7. The gearbox housing air tightness detection device according to claim 1, characterized in that: The argon filling structure comprises gas pipes fixedly connected to two sealed shells (13), the two gas pipes being fixedly connected to an argon tank (11), and the argon tank (11) being fixedly mounted on the operating table (1). A valve is provided on the argon tank (11), and an exhaust port (17) is provided on one side of the sealed shell (13) below, and a sealing plug is sealed in the exhaust port (17).

8. The gearbox housing air tightness detection device according to claim 2, characterized in that: The sealing shielding structure includes a motor slot and two gear slots (30) opened on both sides of the sealing shell (13), and the motor slot, the slide slot (29) and the corresponding two gear slots (30) are connected. The two motor slots are fixedly installed with a motor (25), and the motor (25) is electrically connected to the control computer (4). The driving ends of the two motors (25) are fixedly installed with a rotating shaft, and two spur gears (22) are fixedly installed on the rotating shaft, and the two spur gears (22) rotate in the corresponding gear slots (30) respectively. The two gear slots (30) are sealed and slid with a sealing plate (24), and the lower surfaces of the two sealing plates (24) are fixedly installed with two tooth plates (28), and the tooth plates (28) are respectively engaged with the corresponding spur gears (22).

9. The gearbox housing air tightness detection device according to claim 8, characterized in that: A sealing groove (31) is provided on one side of the two sealing plates (24) adjacent to each other, and a sealing rubber belt is fixedly installed in each of the two sealing grooves (31).

10. The gearbox housing air tightness detection device according to claim 2, characterized in that: The detection structure comprises a plurality of electric telescopic rods (1) (21), a plurality of electric telescopic rods (2) and a plurality of electric telescopic rods (3) fixedly mounted on the bottom of the sealing shell (13); the driving ends of the plurality of electric telescopic rods (21) are fixedly mounted with a rectangular atomizing spray plate (32); the driving ends of the corresponding two electric telescopic rods (2) are fixedly mounted with a U-shaped atomizing spray plate (26); the driving ends of the corresponding two electric telescopic rods (3) are fixedly mounted with a U-shaped atomizing spray plate (23); the upper surfaces of the U-shaped atomizing spray plate (23), the rectangular atomizing spray plate (32) and the U-shaped atomizing spray plate (26) are all provided with a Liquid hole, the upper surfaces of the U-shaped atomizing spray plate 1 (23), the rectangular atomizing spray plate (32) and the U-shaped atomizing spray plate 2 (26) are fixedly installed with a liquid absorbing cloth (27), the ferrous sulfate solution tank (19) is fixedly installed with a pump (20), and the pump (20) is electrically connected to the control computer (4), and the pump (20) is fixedly connected to two pipes, and the upper ends of the two pipes have two upper ports, one of the upper ports on each of the pipes is fixedly connected to the corresponding U-shaped atomizing spray plate 2 (26), and the other upper port on each of the pipes is fixedly connected to the corresponding U-shaped atomizing spray plate 1 (23).

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