Optical screening machine

Abstract

An optical screening machine relates to the technical field of optical screening, and comprises a frame and a working platform. The working platform is used to install equipment required for detection. The optical screening machine also comprises a vibration reduction device, which is fixed on the frame. The vibration reduction device comprises a plurality of vibration dampers. The working platform is connected to each vibration damper to reduce the vibration transmitted to the working platform by the frame. The present invention adds a vibration reduction device between the working platform and the frame of the optical screening machine, so that most of the vibrations transmitted by the frame and generated by the equipment itself are absorbed and weakened by the vibration reduction device, thereby effectively reducing the vibration received by the working platform.

Description

Technical Field

[0001] The invention relates to the technical field of optical screening, and in particular to an optical screening machine. Background Art

[0002] Optical screening machines, also known as visual inspection systems, are commonly used automated inspection equipment in the manufacturing industry. They are mainly used for high-speed, high-precision appearance defect detection, dimensional measurement, and part identification of products. This type of equipment usually uses a vibrating plate to load materials, then conveys materials through a glass turntable, then uses a high-resolution camera to capture images, and finally uses image processing software analysis to determine whether the product is qualified. The application scenarios of optical screening machines usually have certain limitations. In order to capture high-precision images, the optical screening machine needs to be placed in an environment with low vibration to avoid vibration interference caused by the operation of large mechanical equipment nearby, because continuous or severe vibrations will cause the camera to shake during shooting, making the captured image blurred, affecting the subsequent image analysis and processing accuracy, and may also cause the precision mechanical parts inside the optical screening machine (such as guide rails, lens positioning mechanisms, etc.) to wear faster, affecting the positioning accuracy and service life of the equipment. Therefore, whether the vibration can be effectively controlled and reduced is crucial to ensuring the detection accuracy and extending the service life of the optical screening machine. Summary of the invention

[0003] In view of this, the present invention provides an optical screening machine, which can reduce the impact of vibration on itself and can automatically complete leveling.

[0004] To achieve the above objectives, the present invention provides the following technical solutions.

[0005] The optical screening machine includes a frame and a working platform. The working platform is used to install equipment required for detection. The optical screening machine also includes a vibration reduction device, which is fixed on the frame and includes multiple shock absorbers. The working platform is connected to each shock absorber to reduce the vibration transmitted from the frame to the working platform; the vibration reduction device also includes a leveling mechanism, which includes a main water tank, a diversion pipeline and multiple counterweight water tanks. Each counterweight water tank is connected to the main water tank through a diversion pipeline. The diversion pipeline is provided with a diversion valve. The main water tank is filled with counterweight liquid. Each counterweight water tank is hoisted under the working platform. When the working platform tilts to one side, the diversion valve controls the counterweight liquid in the main water tank to flow to the corresponding counterweight water tank to adjust the center of gravity of the working platform to restore it to a horizontal state.

[0006] Among them, the balancing water tank is provided with an anti-sway pressure cover and a pressure cover driver for driving the anti-sway pressure cover to move up and down. The anti-sway pressure cover moves downward to contact and press the liquid level of the balancing liquid in the balancing water tank to prevent the balancing liquid from swaying in the balancing water tank.

[0007] Among them, the anti-sway pressure cover is provided with an exhaust assembly for exhausting air. When the anti-sway pressure cover moves downward, the air between the liquid surface of the counterweight liquid and the anti-sway pressure cover is pressurized and discharged through the exhaust assembly.

[0008] Among them, the exhaust component includes an exhaust hole and a floating hole plug. The floating hole plug can be pushed upward to block the exhaust hole. The floating hole plug can float on the liquid surface of the balancing weight liquid. When the anti-sway pressure cover moves downward, the air between the liquid surface of the balancing weight liquid and the anti-sway pressure cover is pressurized and discharged through the exhaust hole. After the anti-sway pressure cover contacts and presses the liquid surface of the balancing weight liquid, the floating hole plug is floated by the balancing weight liquid and pushed upward to block the exhaust hole.

[0009] Among them, the leveling mechanism also includes a support frame and multiple induction cylinders. The support frame is located below the working platform and is fixedly connected to the frame. Both ends of the induction cylinder are respectively connected to the support frame and the working platform, so that the induction cylinder can be driven to compress or stretch as the working platform tilts. The induction cylinder is connected to the diverter valve to drive the diverter valve through the air pressure generated when it is compressed or stretched, thereby controlling the balancing weight liquid in the main water tank to flow to the corresponding balancing weight water tank.

[0010] Among them, there are multiple diverter valves, the diverter valve includes a valve body, a sliding valve core and a lever, the valve body is provided with a water inlet and two water outlets, the water inlet is connected to the main water tank, and the two water outlets are respectively connected to two counterweight water tanks, the sliding valve core is provided with two diverter holes and is slidably connected to the valve body, the diverter holes correspond to the water outlets one by one, so that when different diverter holes are aligned with the water inlet, the main water tank is connected to different counterweight water tanks, the lever is fixedly connected to the sliding valve core to drive the sliding valve core to move, and the two sides of the lever are respectively connected to the two sensing cylinders so as to be pushed by air pressure. When the two sensing cylinders on both sides of the lever generate an air pressure difference, the lever is pushed by the air pressure, and the sliding valve core is driven to slide by the lever so that one of the diverter holes is aligned with the water inlet, thereby controlling the counterweight liquid in the main water tank to flow to the counterweight water tank connected to the diverter hole.

[0011] Among them, two counterweight water tanks connected to a diverter valve and two induction cylinders connected on both sides of the diverter valve's lever are symmetrically distributed relative to the center point of the working platform, and they are on the same straight line. When the working platform tilts to one side, the two induction cylinders are respectively compressed and stretched to produce an air pressure difference, and the air pressure drives the diverter valve to connect to the counterweight water tank on the opposite side, so that the counterweight liquid flows to the counterweight water tank on the opposite side, thereby adjusting the center of gravity of the working platform to restore it to a level state.

[0012] Among them, the main water tank is also provided with a lifting drive, which is used to drive the main water tank to rise and fall relative to the counterweight water tank. When the lifting drive drives the main water tank to be higher than the counterweight water tank, the counterweight liquid in the main water tank can flow to the counterweight water tank under the action of gravity. When the lifting drive drives the main water tank to be lower than the counterweight water tank, the counterweight liquid in the counterweight water tank can flow back to the main water tank under the action of gravity.

[0013] Among them, the main water tank is also provided with a reflux guide rod, which is provided with an inclined surface and a guide groove. The inclined surface is used to contact and push the lever to move and guide it into the guide groove, and the guide groove is used to keep the lever centered. When the main water tank drops to the lowest position, the inclined surface contacts and pushes the lever to move into the guide groove, and the sliding valve core is driven to remain centered. The water inlet is connected to the two diversion holes at the same time, so that the balancing liquid in each balancing water tank can flow back to the main water tank through their respective water outlets at the same time.

[0014] The beneficial effect of the present invention is that by adding a vibration reduction device between the working platform and the frame of the optical screening machine, most of the vibrations transmitted by the frame and generated by the equipment itself are absorbed and weakened by the vibration reduction device, thereby effectively reducing the vibration of the working platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the optical screening machine of the present invention.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the vibration reduction device.

[0017] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0018] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the floating water hole plug.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the vibration reduction device from another perspective.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of a single diverter valve.

[0022] Figure 8 It is a three-dimensional structural cross-sectional view of the diverter valve.

[0023] Fig. 9 for Figure 8 Schematic diagram of the cross section in the CC direction.

[0024] Fig.10 This is a schematic diagram of the three-dimensional structure of the reflux guide rod and the lever (part of the structure has been hidden for the convenience of display).

[0025] Fig.11 for Fig.10 Enlarged schematic diagram of point D in the middle.

[0026] Reference numerals include:

[0027] Vibration reduction device 1, shock absorber 11, leveling mechanism 12, main water tank 13, lifting driver 131, reflux guide rod 132, inclined surface 1321, guide groove 1322, switch driver 133, counterweight water tank 14, anti-sway pressure cover 141, exhaust hole 1411, floating hole plug 1412, pressure cover driver 142, diverter pipeline 15, diverter valve 16, sliding valve core 161, diverter hole 1611, lever 162, water injection port 163, water outlet 164, valve body 165, induction cylinder 17, switch pipeline 171, support frame 18;

[0028] Working platform 2, frame 3. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments.

[0030] Combination Figure 1 and Figure 2 The optical screening machine of this embodiment includes a frame 3 and a working platform 2. The working platform 2 is used to install the equipment required for the detection. The optical screening machine also includes a vibration reduction device 1. The vibration reduction device 1 is fixed on the frame 3. The vibration reduction device 1 includes a plurality of vibration dampers 11, such as Figure 2 As shown, this embodiment is provided with four vibration absorbers 11, which are evenly distributed at four positions at the bottom of the working platform 2. The upper ends of the vibration absorbers 11 are hinged to the working platform 2. The working platform 2 is connected to each vibration absorber 11 to reduce the vibration transmitted to the working platform 2 by the frame 3. The working platform 2 is not directly connected to the frame 3. If the working platform 2 is directly connected to the frame 3, the vibration of the ground will be directly transmitted to the working platform 2 through the frame 3. By adding a vibration reduction device 1 between the working platform 2 and the frame 3 of the optical screening machine, most of the vibrations transmitted by the frame 3 and generated by the equipment itself are absorbed and weakened by the vibration reduction device 1, thereby effectively reducing the vibration of the working platform 2.

[0031] Since the various devices installed on the working platform 2 are not symmetrically distributed and the weights of the devices are different, the heavier side will further press down the vibration reduction device 1, causing the working platform 2 to be unbalanced and tilted toward the heavier side. This will affect the lighting and image capture of the product to be tested, thereby reducing the accuracy of screening and testing, and will also affect the coordination with other mechanisms, such as loading and unloading mechanisms. Figure 1 As shown, the vibration reduction device 1 also includes a leveling mechanism 12, combined with Figure 6-Figure 9The leveling mechanism 12 includes a main water tank 13, a diverter pipe 15 and a plurality of counterweight water tanks 14. Each counterweight water tank 14 is connected to the main water tank 13 through a diverter pipe 15. The diverter pipe 15 is provided with a diverter valve 16. The main water tank 13 is filled with counterweight liquid. Each counterweight water tank 14 is hoisted under the working platform 2. When the working platform 2 tilts to one side, the diverter valve 16 controls the counterweight liquid in the main water tank 13 to flow to the corresponding counterweight water tank 14 to adjust the center of gravity of the working platform 2 to restore it to a level state. Figure 6 As shown, in this embodiment, there are 4 counterweight water tanks 14 and 2 diverter valves 16. Figure 7-Figure 9 The diverter valve 16 includes a valve body 165, a lever 162 and a sliding valve core 161. The valve body 165 is provided with a water inlet 163 and two water outlets 164. The water inlet 163 is connected to the main water tank 13, and the two water outlets 164 are respectively connected to the two counterweight water tanks 14. The sliding valve core 161 is slidably connected to the valve body 165 and is provided with two diverter holes 1611. The diverter holes 1611 correspond to the water outlets 164 one by one. When the water inlet 163 is respectively aligned with the two diverter holes 1611, the main water tank 13 is respectively connected to their corresponding counterweight water tanks 14. The lever 162 is fixedly connected to the sliding valve core 161 to drive the sliding valve core 161 to move. The sliding valve core 161 can slide to make the water inlet 163 align with different diverter holes 1611 respectively, so that the main water tank 13 is connected to the corresponding counterweight water tank 14. By setting up a counterweight water tank 14, when the working platform 2 tilts in a certain direction, the corresponding counterweight water tank 14 is triggered to increase weight, so that the working platform 2 is balanced and restored to a horizontal state, thereby avoiding a decrease in screening detection accuracy caused by the tilt of the working platform 2 and avoiding affecting the coordination with other mechanisms.

[0032] The leveling mechanism 12 also includes a support frame 18 and a plurality of induction cylinders 17, Figure 1-Figure 2 In this embodiment, there are four induction cylinders 17, and the support frame 18 is located below the working platform 2 and is fixedly connected to the frame 3. The two ends of the induction cylinder 17 are respectively connected to the support frame 18 and the working platform 2, so that the induction cylinder 17 can be driven to compress or stretch as the working platform 2 tilts. Each induction cylinder 17 is also provided with a switch pipeline 171. Figure 7-Figure 8 The induction cylinder 17 is connected to the lever 162 through the switch pipeline 171, so that when it is compressed or stretched, the air pressure generated drives the lever 162 to drive the sliding valve core 161 to move.

[0033] Combination Figure 3 as well as Figure 6-Figure 9The two sides of the lever 162 are respectively connected to the two sensing cylinders 17 so as to be pushed by air pressure. When the two sensing cylinders 17 generate an air pressure difference, the lever 162 is pushed by the air pressure, and the sliding valve core 161 is driven by the lever 162 to slide, so that one of the diverter holes 1611 is aligned with the water injection port 163, thereby controlling the weight liquid in the main water tank 13 to flow to the weight water tank 14 connected to the diverter hole 1611. Figure 2-Figure 3 As shown, two counterweight water tanks 14 connected by a diverter valve 16 and two induction cylinders 17 connected on both sides of its lever 162 are symmetrically distributed relative to the center point of the working platform 2, and they are on the same straight line. When the working platform 2 tilts to one side, the two induction cylinders 17 are respectively compressed and stretched to generate an air pressure difference, and the air pressure drives the diverter valve 16 to connect to the counterweight water tank 14 on the opposite side, so that the counterweight liquid can flow to the counterweight water tank 14 on the opposite side, thereby adjusting the center of gravity of the working platform 2 to restore it to a level state.

[0034] When there is a large space inside the counterweight water tank 14, the counterweight liquid inside it is easy to shake under a vibration environment, thereby causing the counterweight water tank 14 to shake, which in turn causes the counterweight water tank 14 itself to affect the working platform 2. Figure 3 As shown, the counterweight water tank 14 of this embodiment is provided with an anti-sway pressure cover 141 and a pressure cover driver 142 for driving the anti-sway pressure cover 141 to move up and down. The pressure cover driver 142 of this embodiment is in the form of a cylinder, and it can also be other driving forms such as a hydraulic cylinder or a linear motor. The anti-sway pressure cover 141 moves down to contact and press the liquid surface of the counterweight liquid in the counterweight water tank 14 to prevent the counterweight liquid from shaking in the counterweight water tank 14. By providing the anti-sway pressure cover 141, when the counterweight liquid shakes, the pressure cover driver 142 drives the anti-sway pressure cover 141 to press down to the liquid surface of the counterweight liquid, so that the counterweight liquid loses the space to shake, so that the counterweight liquid can no longer shake.

[0035] Since the counterweight water tank 14 is covered by the anti-shake pressure cover 141, if the counterweight water tank 14 is completely sealed, the counterweight liquid will be difficult to enter the counterweight water tank 14 due to the existence of air pressure. Figure 3-Figure 4 As shown, the anti-sway pressure cover 141 is provided with an exhaust assembly for exhausting air. When the anti-sway pressure cover 141 moves downward, the air between the liquid surface of the counterweight liquid and the anti-sway pressure cover 141 is compressed and discharged through the exhaust assembly. Figure 4 and Figure 5As shown, the exhaust assembly includes an exhaust hole 1411 and a floating hole plug 1412. The floating hole plug 1412 is in a cone shape, and a series of grooves for exhaust are arranged on its side. When the floating hole plug 1412 does not float, air can be discharged from the groove. After the floating hole plug 1412 is pushed upward, its cone surface blocks the exhaust hole 1411. The floating hole plug 1412 is hollow and can float on the liquid surface of the balancing weight liquid. When the anti-sway pressure cover 141 moves downward, the air between the liquid surface of the balancing weight liquid and the anti-sway pressure cover 141 is compressed and discharged through the exhaust hole 1411. After the anti-sway pressure cover 141 contacts and presses the liquid surface of the balancing weight liquid, the floating hole plug 1412 is pushed upward by the floating weight liquid to block the exhaust hole 1411. The exhaust assembly is arranged on the anti-sway pressure cover 141, so that the balancing weight water tank 14 is connected with the external air, so that the balancing weight liquid can flow from the main water tank 13 into the balancing weight water tank 14 more easily. When the anti-sway pressure cover 141 is pressed down, the floating hole plug 1412 is first kept separated from the vent hole under the action of gravity and does not contact each other, so that the air in the counterweight water tank 14 can be discharged from the vent hole. After the anti-sway pressure cover 141 is pressed down until it contacts the surface of the counterweight liquid, the floating hole plug 1412 floats up, contacts and blocks the vent hole. The structure is simple and reliable, and can effectively prevent the counterweight liquid from being discharged from the vent hole due to the pressure of the anti-sway pressure cover 141.

[0036] like Figure 3 As shown, the main water tank 13 is also provided with a lifting driver 131 and a switch driver 133. The lifting driver 131 and the switch driver 133 of this embodiment are both in the form of cylinders. Other driving forms such as hydraulic cylinders or linear motors can also be used. The lifting driver 131 is used to drive the main water tank 13 to rise and fall relative to the counterweight water tank 14. The switch driver 133 is used to open and close the shunt pipeline 15 connected to the main water tank 13. When the lifting driver 131 drives the main water tank 13 to be higher than the counterweight water tank 14, the counterweight liquid in the main water tank 13 can flow to the counterweight water tank 14 under the action of gravity. When the lifting driver 131 drives the main water tank 13 to be lower than the counterweight water tank 14, the counterweight liquid in the counterweight water tank 14 can flow back to the main water tank 13 under the action of gravity. When the anti-sway pressure cover 141 is pressed down to the liquid level of the counterweight liquid, the switch driver 133 closes the shunt pipeline 15 to prevent the counterweight liquid from being accidentally pressed back to the main water tank 13 by the anti-sway pressure cover 141. A lifting drive 131 is provided to drive the main water tank 13 to move up and down, so that the counterweight liquid can automatically flow from the main water tank 13 to the counterweight water tank 14 or flow from the counterweight water tank 14 back to the main water tank 13 under the action of gravity, simply by raising or lowering the main water tank 13. The structure is simple and reliable.

[0037] When the main water tank 13 drops to the lowest position, the sliding valve core 161 may only be connected to a single counterweight water tank 14, resulting in the counterweight liquid in the other counterweight water tank 14 being unable to flow back to the main water tank 13. Fig.10As shown, the main water tank 13 of this embodiment is also provided with two return guide rods 132, and the return guide rod 132 is provided with an inclined surface 1321 and a guide groove 1322. The inclined surface 1321 is used to contact and push the lever 162 to move and guide it into the guide groove 1322. The guide groove 1322 and the water injection port 163 are on the same vertical plane, so that after the lever 162 enters the guide groove 1322, it can drive the sliding valve core 161 to be centered, so that the water injection port 163 is aligned with the two diversion holes 1611 at the same time, and then the two counterweight water tanks 14 can be connected to the main water tank 13 at the same time through the two water outlets 164 corresponding to the two diversion holes 1611. When the main water tank 13 drops to the lowest position, the inclined surface 1321 contacts and pushes the lever 162 to enter the guide groove 1322, and the sliding valve core 161 is driven to connect the two counterweight water tanks 14 at the same time, and the counterweight liquid in the counterweight water tank 14 can flow back to the main water tank 13 at the same time. By setting the reflux guide rod 132, when the main water tank 13 descends, the sliding valve core 161 of the diverter valve 16 is driven by the reflux guide rod 132 to connect the two counterweight water tanks 14 at the same time, ensuring that the counterweight liquid in the counterweight water tanks 14 connected to all the diverter valves 16 can flow back to the main water tank 13 smoothly.

[0038] The specific working process of the optical screening machine provided in this embodiment is as follows:

[0039] When the optical screening machine is working, the vibration generated by the equipment on the working platform 2 is absorbed and weakened by the vibration absorber, and the vibration of the surrounding environment is also transmitted to the vibration absorber 11 through the frame 3 and absorbed and weakened;

[0040] After replacing the equipment on the working platform 2 or adjusting the position of the first-phase equipment, the force on the working platform 2 changes. When the working platform 2 tilts to one side due to unbalanced force, the induction cylinder 17 on that side is compressed, and the induction cylinder 17 on the opposite side is stretched. The pressure difference between them drives the lever 162 through the switch pipeline 171, and the lever 162 drives the sliding valve core 161 to slide, so that one of the diverter holes 1611 is aligned with the water injection port 163, and the counterweight liquid in the main water tank 13 flows through the outlet 164 corresponding to the diverter hole 1611 to the counterweight water tank 14 on the opposite side of the tilt to increase its weight until the forces on both sides of the working platform 2 are balanced and restored to the level. Depending on the direction of the tilt, multiple induction cylinders 17 and counterweight water tanks 14 may be involved in each leveling.

[0041] When the working platform 2 needs to be readjusted, the lifting drive 131 drives the main water tank 13 to descend. When the main water tank 13 descends to the lowest position, the inclined surfaces 1321 of the two return guide rods 132 respectively contact and push the levers 162 of the two diverter valves 16 into the guide groove 1322. The sliding valve cores 161 of the two diverter valves 16 are driven to connect all the counterweight water tanks 14 at the same time. The counterweight liquid in the counterweight water tank 14 flows back to the main water tank 13 at the lower position at the same time under the action of gravity. After the counterweight liquid flows back to the main water tank 13, the lifting drive 131 drives the main water tank 13 to rise to divert the counterweight liquid again, thereby adjusting the working platform 2 again to restore it to a level state.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An optical screening machine, comprising a frame and a working platform, the working platform being used to install equipment required for detection, characterized in that: It also includes a vibration reduction device, which is fixed on the frame and includes a plurality of vibration absorbers. The working platform is connected to each vibration absorber to reduce the vibration transmitted from the frame to the working platform. The vibration reduction device also includes a leveling mechanism, which includes a main water tank, a shunt pipeline and a plurality of counterweight water tanks. Each counterweight water tank is connected to the main water tank through a shunt pipeline. The shunt pipeline is provided with a shunt valve. The main water tank is filled with counterweight liquid. Each counterweight water tank is hoisted under the working platform. The main water tank is in the center. Each counterweight water tank is distributed on the side of the main water tank. There are a plurality of shunt valves. Each shunt valve is connected to two counterweight water tanks. The two counterweight water tanks are symmetrically distributed relative to the center point of the working platform. When the working platform tilts to one side, the shunt valve controls the counterweight liquid in the main water tank to flow to the corresponding counterweight water tank to adjust the center of gravity of the working platform to restore it to a horizontal level. The main water tank is also provided with a lifting drive, which is used to drive the main water tank to rise and fall relative to the counterweight water tank. When the lifting drive drives the main water tank to be higher than the counterweight water tank, the counterweight liquid in the main water tank can flow to the counterweight water tank under the action of gravity. When the lifting drive drives the main water tank to be lower than the counterweight water tank, the counterweight liquid in the counterweight water tank can flow back to the main water tank under the action of gravity.

2. The optical screening machine according to claim 1, characterized in that: The balancing water tank is provided with an anti-sway pressure cover and a pressure cover driver for driving the anti-sway pressure cover to move up and down. The anti-sway pressure cover moves down to contact and press the liquid surface of the balancing liquid in the balancing water tank to prevent the balancing liquid from swaying in the balancing water tank.

3. The optical screening machine according to claim 2, characterized in that: The anti-sway pressure cover is provided with an exhaust assembly for exhausting air. When the anti-sway pressure cover moves downward, the air between the liquid surface of the counterweight liquid and the anti-sway pressure cover is pressurized and discharged through the exhaust assembly.

4. The optical screening machine according to claim 3, characterized in that: The exhaust assembly includes an exhaust hole and a floating hole plug. The floating hole plug is pushed upward to block the exhaust hole. The floating hole plug floats on the liquid surface of the balancing weight liquid. When the anti-sway pressure cover moves downward, the air between the liquid surface of the balancing weight liquid and the anti-sway pressure cover is pressurized and discharged through the exhaust hole. After the anti-sway pressure cover contacts and presses the liquid surface of the balancing weight liquid, the floating hole plug is floated by the balancing weight liquid and pushed upward to block the exhaust hole.

5. The optical screening machine according to claim 1, characterized in that: The leveling mechanism also includes a support frame and multiple induction cylinders. The support frame is located below the working platform and is fixedly connected to the frame. Both ends of the induction cylinder are respectively connected to the support frame and the working platform so that the induction cylinder can be driven to compress or stretch as the working platform tilts. The induction cylinder is connected to the diverter valve so that the diverter valve can be driven by the air pressure generated when it is compressed or stretched, thereby controlling the balancing weight liquid in the main water tank to flow to the corresponding balancing weight water tank.

6. The optical screening machine according to claim 5, characterized in that the diverter valve include: The valve body is provided with a water inlet and two water outlets, the water inlet is connected to the main water tank, and the two water outlets are respectively connected to the two counterweight water tanks; A sliding valve core is provided with two diverter holes and is slidably connected to the valve body, wherein the diverter holes correspond to the water outlets one by one, so that when different diverter holes are aligned with the water inlet, the main water tank is connected to different counterweight water tanks; A lever, which is fixedly connected to the sliding valve core to drive the sliding valve core to move, and two sides of the lever are respectively connected to two induction cylinders to be pushed by air pressure; When the two sensing cylinders on both sides of the lever generate an air pressure difference, the lever is pushed by the air pressure, and the sliding valve core is driven to slide by the lever so that one of the diversion holes is aligned with the water inlet, thereby controlling the weight liquid in the main water tank to flow to the weight water tank connected to the diversion hole.

7. The optical screening machine according to claim 6, characterized in that: Two counterweight water tanks connected by a diverter valve and two induction cylinders connected on both sides of the diverter valve's lever, the two counterweight water tanks and the two induction cylinders are symmetrically distributed relative to the center point of the working platform, and they are on the same straight line. When the working platform tilts to one side, the two induction cylinders are respectively compressed and stretched to generate an air pressure difference, and the air pressure drives the diverter valve to connect to the counterweight water tank on the other side, so that the counterweight liquid in the main water tank flows to the counterweight water tank, thereby adjusting the center of gravity of the working platform to restore it to a level state.

8. The optical screening machine according to claim 6, characterized in that: The main water tank is also provided with a reflux guide rod, which is provided with an inclined surface and a guide groove. The inclined surface is used to contact and push the lever into the guide groove, and the guide groove is used to keep the lever centered. When the main water tank drops to the lowest position, the inclined surface contacts and pushes the lever to move into the guide groove, and the sliding valve core is driven to remain centered. The water inlet is connected to the two diversion holes at the same time, so that the balancing liquid in each balancing water tank can flow back to the main water tank through their respective water outlets at the same time.

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