A sieving device and method for porcelain insulator blanks

Abstract

This invention discloses a sieving device and method for porcelain insulator blanks, relating to the field of porcelain insulator processing technology. The method includes the following steps: S1, mixing water with the raw materials for blank preparation, pulping, and ball milling to obtain a slurry; S2, sieving the slurry, removing iron, pressing, and kneading it to obtain a clay material; S21, shaking the slurry during sieving; S22, guiding the slurry to reduce accumulation; S3, electro-drying, cutting, and drying the clay material to obtain a blank; S4, glazing the blank, including preheating, glazing, and drying; S5, firing the blank in a furnace to form a porcelain body, and installing fittings on the porcelain body to obtain an insulator. This sieving device and method for porcelain insulator blanks improves the efficiency of porcelain insulator processing and manufacturing by incorporating auxiliary sieving feeding, preheating, and drying operations.

Description

Technical Field

[0001] This invention relates to the field of porcelain insulator processing technology, and in particular to a porcelain insulator blank screening equipment and screening method. Background Technology

[0002] Porcelain insulators have good insulation and mechanical strength. They are mainly made of porcelain or glass electrical insulating materials. They can be installed between conductors at different potentials or between a conductor and a ground potential component. They can withstand voltage and mechanical stress and are a special type of insulating control.

[0003] In the existing technology, during the processing and manufacturing of porcelain insulators, the porcelain insulator slurry has a certain viscosity, which easily causes clogging of the sieve feed. This clogging is usually done manually, which affects the feeding speed. Furthermore, there is a lack of a preheating step before glazing, which reduces the processing efficiency of porcelain insulators.

[0004] Therefore, it is necessary to propose a sieving device and method for porcelain insulator blanks to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a sieving device and method for porcelain insulator blanks, in order to solve the problems in the prior art where, during the processing and manufacturing of porcelain insulators, the porcelain insulator slurry has a certain viscosity, which easily causes clogging of the sieving feed, and is usually cleaned manually, affecting the feeding speed. In addition, there is a lack of a preheating step before glazing, which reduces the processing efficiency of porcelain insulators.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for sieving porcelain insulator blanks, comprising the following operational steps:

[0007] S1. Mix water with the raw materials for making blanks, then pulp and ball mill to obtain a slurry;

[0008] S2. The slurry is screened, iron removed, pressed and kneaded to obtain mud.

[0009] S21. During the screening and feeding process, the slurry is shaken.

[0010] S22. The slurry undergoes a guiding treatment to reduce accumulation;

[0011] S23. Combination of vibrating screening and push scraping screening;

[0012] S3. The clay is subjected to electric drying, cutting, and drying to obtain the blank;

[0013] S4. Glazing treatment of the blank, which includes preheating, glazing and drying in sequence;

[0014] S5. Place the blank into the furnace and fire it into a porcelain body. Install the hardware on the porcelain body to obtain an insulator.

[0015] Preferably, during the glazing process of the blank, preheating and drying are performed using a heating device, which includes a heating chamber. An installation plate is fixedly connected inside the heating chamber, and a drive motor is fixedly connected to the bottom of the installation plate. A circular hole is provided on the installation plate for the drive shaft of the drive motor to pass through. A tray is fixedly connected to the drive shaft of the drive motor. An air box is fixedly connected to one inner wall of the heating chamber, and an air outlet slot is provided on the air box. A support block is fixedly connected to the bottom of the air box, and a round rod is rotatably connected to the support block. The round rod is distributed correspondingly to the air outlet slot. An elastic strip is fixedly connected to the round rod, and a torsion spring is fitted onto the round rod. A strip plate is fixedly connected to the bottom of the round rod. A protrusion is fixedly connected to the outer ring of the tray, and the protrusion cooperates with the strip plate.

[0016] This invention also discloses a porcelain insulator blank screening device, applied to the aforementioned porcelain insulator blank screening method. It further includes a base frame, a screen box mounted on top of the base frame, and a screen cover fitted to the top of the screen box. The screen box and screen cover are inclined. A feed chute is opened on the top of the screen cover, located at the upwardly inclined end of the screen cover. A feed hopper is fixedly connected to the upper surface of the screen cover, and the feed hopper is correspondingly connected to the feed chute. A scraper box is slidably mounted inside the feed hopper. The scraper box is U-shaped and adheres to the inner wall of the feed hopper. A first airbag is fixedly connected to the scraper box, and the first airbag is connected to the scraper box. The scraper box drives the first airbag to move up and down, and the first airbag switches between contraction and expansion to accelerate the feeding of slurry. Simultaneously, the scraper box pushes and scrapes the inner wall of the feed hopper. A second airbag is fixedly connected to the lower surface of the top of the screen cover. The wall thickness of the second airbag near the feed chute decreases from top to bottom. When the second airbag expands, it guides the slurry.

[0017] Preferably, a vertical box is fixedly connected to the top of the scraper box. The vertical box is inverted L-shaped and communicates with the scraper box. A first electric push rod is fixedly connected to the upper surface of the screen cover. The top of the vertical box is fixedly connected to the telescopic end of the first electric push rod.

[0018] Preferably, the top of the vertical box is connected to a second air duct, and a first solenoid valve is fixedly installed on the second air duct.

[0019] Preferably, a third air duct is connected to the second airbag, and the end of the third air duct away from the second airbag extends to the outside of the screen cover. A second solenoid valve is fixedly installed on the third air duct.

[0020] Preferably, the base frame is provided with a wind power assembly that cooperates with the second air duct and the third air duct. The wind power assembly includes a fan, a first air duct, and a T-joint. The fan is fixedly installed on the base frame. One end of the first air duct is connected to the fan, and the other end of the first air duct is connected to the T-joint. The end of the second air duct away from the vertical box is connected to one of the joints of the T-joint, and the end of the third air duct away from the second airbag is connected to the other joint of the T-joint.

[0021] Preferably, a screen is fixedly connected inside the screen box, a swing bar is slidably arranged on the upper surface of the screen, a sliding groove is opened on the side wall of the screen box, a sliding strip is slidably arranged inside the sliding groove, the swing bar is fixedly connected to one end of the sliding strip located inside the screen box, a second electric push rod is fixedly connected to the outer wall of the screen box, and the sliding strip is fixedly connected to the telescopic end of the second electric push rod.

[0022] Preferably, the bottom of the swing bar has a groove, and the groove is provided in multiple ways and the multiple grooves are evenly distributed.

[0023] Preferably, the screen box is connected to a first discharge cylinder and a second discharge cylinder, and springs are fixedly connected to the four corners of the bottom of the screen box. The bottom ends of the springs are fixedly connected to the base frame, and a vibration motor is installed at the bottom of the screen box.

[0024] The technical effects and advantages of this invention are as follows:

[0025] 1. This invention improves the efficiency of porcelain insulator processing and manufacturing by setting up auxiliary sieving feeding, preheating, drying and other operations;

[0026] 2. By setting up structures such as scraper box and first airbag, the first airbag moves up and down synchronously with shaking, expanding the stirring area. At the same time, the scraper box adheres to the inner wall of the feed hopper to push and scrape, avoiding blockage and improving the efficiency of the porcelain insulator blank screening equipment.

[0027] 3. The second airbag switches between expansion and contraction, which serves as a guide for the slurry and also produces a shaking effect to prevent accumulation and blockage at the connection between the screen and the feed chute;

[0028] 4. After sieving, when cleaning the feed hopper, the scraper box can be placed against the inner wall of the feed hopper to assist in cleaning.

[0029] 5. The swing bars are attached to the screen and push and scrape back and forth, which speeds up the turning of the billet. The combination of vibrating screening and pushing and scraping screening improves the screening efficiency.

[0030] 6. The wavy bar is attached to the screen and pushes back and forth, causing the slurry to move irregularly, which further improves the screening speed. Attached Figure Description

[0031] Figure 1 This is a flowchart of the method for sieving porcelain insulator blanks according to the present invention.

[0032] Figure 2 This is a schematic diagram of the heating box and mounting plate structure of the present invention.

[0033] Figure 3 This is a schematic diagram of the heating box and air box structure of the present invention.

[0034] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0035] Figure 5 This is a schematic diagram of the sieve cover and sieve box structure of the present invention.

[0036] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B.

[0037] Figure 7 This is a schematic diagram of the feed hopper and the first airbag structure of the present invention.

[0038] Figure 8 This is a schematic diagram of the structure of the screen cover and feed hopper of the present invention.

[0039] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C.

[0040] Figure 10 For the present invention Figure 8 Enlarged schematic diagram of the structure at point D

[0041] Figure 11 This is a schematic diagram of the sieve box and sieve structure of the present invention.

[0042] Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at point D.

[0043] In the diagram: 1. Base frame; 2. Screen box; 3. Screen mesh; 4. Screen cover; 5. Vibrating motor; 6. Feed chute; 7. Feed hopper; 8. Scraper box; 9. First airbag; 10. Vertical box; 11. First electric push rod; 12. Fan; 13. First air duct; 14. T-joint; 15. Second air duct; 16. First solenoid valve; 17. Third air duct; 18. Second solenoid valve; 19. Second airbag; 20. Swing bar; 21. Groove; 22. Slide groove; 23. Slide bar; 24. Second electric push rod; 25. Spring; 26. First discharge cylinder; 27. Second discharge cylinder; 28. Heating box; 29. ​​Mounting plate; 30. Tray; 31. Air box; 32. Air outlet slot; 33. Support block; 34. Round rod; 35. Elastic strip; 36. Torsion spring; 37. Strip plate; 38. Protrusion; 39. Drive motor. Detailed Implementation

[0044] This invention provides, for example Figures 1-4 The method for sieving porcelain insulator blanks shown includes the following steps:

[0045] S1. Mix water with the raw materials for making blanks, then pulp and ball mill to obtain a slurry;

[0046] S2. The slurry is screened, iron removed, pressed and kneaded to obtain mud.

[0047] S21. During the screening and feeding process, the slurry is shaken.

[0048] S22. The slurry undergoes a guiding treatment to reduce accumulation;

[0049] S23. Combination of vibrating screening and push scraping screening;

[0050] S3. The clay is subjected to electric drying, cutting, and drying to obtain the blank;

[0051] S4. Glazing treatment of the blank, which includes preheating, glazing and drying in sequence;

[0052] S5. Place the blank into the furnace and fire it into a porcelain body. Install the hardware on the porcelain body to obtain an insulator.

[0053] During the glazing process, heating equipment is used for preheating and drying of the blanks.

[0054] The heating equipment includes a heating chamber 28 and a door panel (not shown in the figure). An installation plate 29 is fixedly connected inside the heating chamber 28. A drive motor 39 is fixedly connected to the bottom of the installation plate 29. The installation plate 29 has a circular hole through which the drive shaft of the drive motor 39 passes. A tray 30 is fixedly connected to the drive shaft of the drive motor 39. In actual use, the billet is placed on the tray 30, and the drive motor 39 drives the billet to rotate through the tray 30. A clamping assembly, including clamping plates and other structures, can also be installed on the tray 30 to fix the billet in place, improving the stability of the billet's rotation.

[0055] A wind box 31 is fixedly connected to one inner wall of the heating box 28. The wind box 31 has an air outlet slot 32 and is connected to the high-temperature gas supply pipe of the factory. The side of the heating box 28 away from the wind box 31 is connected to the suction pipe of the factory, forming a high-temperature airflow inside the heating box 28, which facilitates preheating and drying operations.

[0056] To expand the air supply area, a support block 33 is fixedly connected to the bottom of the air box 31. A round rod 34 is rotatably connected to the support block 33, and the round rod 34 is distributed correspondingly to the air outlet slot 32. Multiple elastic strips 35 are fixedly connected to the round rod 34. A torsion spring 36 is fitted onto the round rod 34, with one end of the torsion spring 36 fixedly connected to the support block 33 and the other end fixedly connected to the round rod 34. A strip plate 37 is fixedly connected to the bottom of the round rod 34. Multiple protrusions 38 are fixedly connected to the outer ring of the tray 30, and the protrusions 38 are evenly distributed around the tray 30, cooperating with the strip plate 37.

[0057] During preheating, the blank is placed on the tray 30, and the drive motor 39 drives the blank to rotate through the tray 30. High-temperature gas is delivered to the blank through the air box 31 and the air outlet 32, forming a high-temperature airflow inside the heating box 28 to preheat the blank. This helps the glaze to adhere better to the blank, reduces the risk of peeling or cracking, and improves the yield. When the protrusion 38 contacts the strip 37, it will squeeze the strip 37 to swing, and the elastic strip 35 will swing synchronously. When the protrusion 38 and the strip 37 are misaligned, the reset force of the torsion spring 36 will reset the strip 37, and the elastic strip 35 will reset synchronously. As the tray 30 continues to rotate, the elastic strip 35 exhibits a reciprocating swing effect, which agitates the high-temperature gas blown out by the air outlet 32 ​​and expands the range of action.

[0058] During drying, follow the same steps as above, but first allow the glaze to air dry naturally to ensure that it does not drip. Then place it on tray 30 for drying, and use the high-temperature airflow inside the heating box 28 to accelerate the drying speed.

[0059] This invention provides, for example Figures 5-12The porcelain insulator blank screening device shown includes a base frame 1, which is fixedly installed on the ground. A screen box 2 is set above the base frame 1. A screen mesh 3 is fixedly connected inside the screen box 2. A screen cover 4 is fitted on the top of the screen box 2. The screen box 2, screen mesh 3 and screen cover 4 are set at an inclination. A feed chute 6 is opened on the top of the screen cover 4. The feed chute 6 is located at the upward inclination end of the screen cover 4. A feed hopper 7 is fixedly connected to the upper surface of the screen cover 4. The feed hopper 7 is correspondingly connected to the feed chute 6.

[0060] The screen box 2 is connected to the first discharge cylinder 26 and the second discharge cylinder 27. Springs 25 are fixedly connected to the four corners of the bottom of the screen box 2. The bottom end of the springs 25 is fixedly connected to the base frame 1. A vibration motor 5 is installed at the bottom of the screen box 2.

[0061] During the manufacturing process of porcelain insulator blanks, the blank raw materials (slurry) can be transported to the inside of the feed hopper 7 by the operator or the feeding device. The feeding device includes structures such as conveying pipes. The feeding device is a common existing technology and will not be described in detail here.

[0062] The slurry enters the screen box 2 through the feed chute 6 and falls onto the screen 3. At the same time, the vibration motor 5 is started, causing the screen box 2 and screen 3 to start vibrating. The screen 3 is set at an angle, thereby vibrating and screening the slurry on the screen 3. As the slurry passes through the screen 3, larger slurry particles will travel along the screen 3 to the end away from the feed hopper 7, and finally be discharged outward through the second discharge cylinder 27. Smaller slurry particles fall downward through the screen holes of the screen 3 to the bottom of the screen box 2, and finally be discharged outward through the first discharge cylinder 26.

[0063] Considering that the porcelain insulator slurry has a certain viscosity and is prone to clogging during feeding, and is usually cleaned manually, in order to improve the screening efficiency, a scraper box 8 is slidably installed inside the feed hopper 7. The scraper box 8 is U-shaped and is attached to the inner wall of the feed hopper 7. The scraper box 8 pushes and scrapes against the inner wall of the feed hopper 7 to prevent the slurry from adhering and accumulating on the inner wall of the feed hopper 7, thus avoiding clogging caused by continuous accumulation.

[0064] Furthermore, after sieving, when cleaning the feed hopper 7, the scraper box 8 can be attached to the inner wall of the feed hopper 7 to push and scrape, assisting in the cleaning.

[0065] A vertical box 10 is fixedly connected to the top of the scraper box 8. The vertical box 10 is inverted L-shaped and communicates with the scraper box 8. A first electric push rod 11 is fixedly connected to the upper surface of the screen cover 4. The top of the vertical box 10 is fixedly connected to the telescopic end of the first electric push rod 11. The scraper box 8 moves up and down inside the feed hopper 7 through the first electric push rod 11 and the vertical box 10.

[0066] A first airbag 9 is fixedly connected to the scraper box 8, and the first airbag 9 is connected to the scraper box 8. A second air duct 15 is connected to the top of the vertical box 10, and the second air duct 15 is a telescopic flexible hose that does not affect the vertical movement of the vertical box 10. A first solenoid valve 16 is fixedly installed on the second air duct 15. Specifically, gas is supplied into the first airbag 9, causing the first airbag 9 to inflate and expand; the gas inside the first airbag 9 is sucked out, causing the first airbag 9 to deflate and contract. The inflation and deflation operations are repeated multiple times, and the first airbag 9 will produce a shaking effect, which can agitate the slurry inside the feed hopper 7.

[0067] A second airbag 19 is fixedly connected to the lower surface of the top of the screen cover 4. The wall thickness of the second airbag 19 near the feed trough 6 decreases from top to bottom. When the second airbag 19 inflates, it is used to guide the slurry. (Refer to...) Figure 5 The wall thickness of the second airbag 19 on the side near the feed trough 6 decreases from top to bottom. When inflated, the deformation at the bottom of the side near the feed trough 6 is greater than that at the top. A third air duct 17 is connected to the second airbag 19. The end of the third air duct 17 away from the second airbag 19 extends to the outside of the screen cover 4. A second solenoid valve 18 is fixedly installed on the third air duct 17.

[0068] The base frame 1 is equipped with a wind power assembly that cooperates with the second air duct 15 and the third air duct 17. The wind power assembly includes a fan 12, a first air duct 13, and a three-way connector 14. The fan 12 is fixedly mounted on the base frame 1 and can switch between air supply and suction. One end of the first air duct 13 is connected to the fan 12, and the other end of the first air duct 13 is connected to the three-way connector 14. The end of the second air duct 15 away from the vertical box 10 is connected to one of the joints of the three-way connector 14, and the end of the third air duct 17 away from the second airbag 19 is connected to the other joint of the three-way connector 14.

[0069] In actual use, during the feeding process from the feed hopper 7 and feed trough 6 into the screen box 2, the blower 12 is started, the first solenoid valve 16 is opened, and the second solenoid valve 18 is closed, controlling the blower 12 to supply air. The blower 12 delivers gas into the first airbag 9 through the first air duct 13, the second air duct 15, the vertical box 10, and the scraper box 8, causing the first airbag 9 to inflate and expand. Then, the blower 12 is controlled to perform a suction operation, and the blower 12 draws the gas inside the first airbag 9 through the first air duct 13, the second air duct 15, the vertical box 10, and the scraper box 8, causing the first airbag 9 to deflate and contract.

[0070] Following the above steps, the inflation and deflation operations are repeated multiple times, which causes the first airbag 9 to vibrate and agitate the slurry inside the feed hopper 7, thus preventing blockage.

[0071] Simultaneously, the telescopic end of the first electric push rod 11 is extended, driving the scraper box 8 and the first airbag 9 to move upward inside the feed hopper 7 via the vertical box 10. The scraper box 8 adheres to the inner wall of the feed hopper 7 and pushes upward. Then, the telescopic end of the first electric push rod 11 is retracted, driving the scraper box 8 and the first airbag 9 to move downward inside the feed hopper 7 via the vertical box 10. The scraper box 8 adheres to the inner wall of the feed hopper 7 and pushes downward. The telescopic end of the first electric push rod 11 extends and retracts repeatedly, and the scraper box 8 pushes and scrapes the inner wall of the feed hopper 7 up and down to prevent the slurry from adhering and accumulating on the inner wall of the feed hopper 7, further avoiding blockage.

[0072] In addition, the first airbag 9 moves up and down in sync with the inflation and deflation operations, expanding the agitation area and improving the unblocking effect.

[0073] By setting up structures such as scraper box 8 and first airbag 9, the first airbag 9 moves up and down synchronously with shaking, expanding the stirring area. At the same time, scraper box 8 adheres to the inner wall of feed hopper 7 to push and scrape, avoiding blockage and improving the efficiency of porcelain insulator slurry screening equipment.

[0074] When there is a large amount of material being fed at any given time, in order to avoid excessive accumulation and affect the screening efficiency, the blower 12 is controlled to deliver air. The blower 12 delivers gas to the inside of the first air bag 9 through the first air duct 13 and the second air duct 15, so that the first air bag 9 is fully inflated, which isolates the feed hopper 7 and stops the feeding.

[0075] In practical use, a pressure sensor can be installed inside the first airbag 9 to monitor the gas pressure inside the first airbag 9.

[0076] During the feeding process, the second solenoid valve 18 is opened, and the blower 12 delivers gas to the interior of the second airbag 19 through the first air duct 13 and the third air duct 17. This process can be synchronized with the inflation of the first airbag 9.

[0077] Reference Figure 5 The wall thickness of the second airbag 19 near the feed trough 6 decreases from top to bottom, and the deformation at the bottom is greater than that at the top. Therefore, the side of the second airbag 19 near the feed trough 6 will be inclined. When the slurry enters the screen box 2 from the feed trough 6, under the action of the inclined surface of the second airbag 19 and the expansion thrust, the slurry will move to the left, which plays a guiding role, expands the range of slurry falling on the screen 3, and makes it less likely to accumulate.

[0078] When the blower 12 draws gas from the inside of the second airbag 19 through the first air duct 13 and the third air duct 17, the second airbag 19 contracts and becomes smaller, and the slurry falls vertically from the feed trough 6.

[0079] The second airbag 19 switches between expansion and contraction, serving as a guide for the slurry and producing a shaking effect to prevent accumulation and blockage at the connection between the screen 3 and the feed trough 6.

[0080] A swing bar 20 is slidably mounted on the upper surface of the screen 3. A groove 22 is provided on the side wall of the screen box 2, and a slide bar 23 is slidably mounted inside the groove 22. The swing bar 20 is fixedly connected to one end of the slide bar 23 located inside the screen box 2. A second electric push rod 24 is fixedly connected to the outer wall of the screen box 2, and the slide bar 23 is fixedly connected to the telescopic end of the second electric push rod 24. The second electric push rod 24 drives the swing bar 20 to slide back and forth through the slide bar 23.

[0081] The bottom of the swing bar 20 is provided with a groove 21. Multiple grooves 21 are provided and evenly distributed. The multiple grooves 21 make the bottom end of the swing bar 20 serrated, which facilitates the movement of the slurry.

[0082] The wave-shaped bar 20 expands the contact area with the slurry and causes the slurry to move irregularly.

[0083] When vibrating and screening the slurry on the screen 3, the extension end of the second electric push rod 24 is extended, driving the slide bar 23 to slide outward from the slide groove 22. The extension end of the second electric push rod 24 is retracted, driving the slide bar 23 to slide inward from the slide groove 22. This causes the swing bar 20 to stick to the screen 3 and push and scrape back and forth, accelerating the slurry turning. The combination of vibrating screening and pushing and scraping screening improves the screening efficiency.

[0084] Meanwhile, the swing bar 20 is wavy. When the swing bar 20 is attached to the screen 3 and pushes and scrapes back and forth, the slurry moves irregularly, which further improves the screening speed.

[0085] Working principle: The slurry is conveyed to the inside of the feed hopper 7 by the operator or the feeding device. The slurry enters the screen box 2 through the feed chute 6 and falls onto the screen 3. At the same time, the vibration motor 5 is started, which makes the screen box 2, screen 3 and so on start vibrating. The screen 3 is set at an angle, so as to vibrate and screen the slurry on the screen 3. The larger slurry particles will go along the screen 3 to the end away from the feed hopper 7, and finally be discharged outward through the second discharge cylinder 27. The smaller slurry particles fall down to the bottom of the screen box 2 through the screen holes of the screen 3, and finally be discharged outward through the first discharge cylinder 26.

[0086] During the feeding process from the feed hopper 7 and feed trough 6 into the screen box 2, the blower 12 is started, the first solenoid valve 16 is opened, and the second solenoid valve 18 is closed. The blower 12 is controlled to supply air, and the blower 12 delivers gas into the first airbag 9 through the first air duct 13, the second air duct 15, the vertical box 10, and the scraper box 8, causing the first airbag 9 to inflate and expand. Then, the blower 12 is controlled to perform a suction operation, and the blower 12 draws gas from the first air duct 13, the second air duct 15, the vertical box 10, and the scraper box 8, causing the first airbag 9 to deflate and contract. The inflation and deflation operations are repeated multiple times according to the above steps, thereby causing the first airbag 9 to vibrate and agitate the slurry inside the feed hopper 7, preventing blockage. Simultaneously, the telescopic end of the first electric push rod 11 is extended, driving the scraper box 8 and the first airbag 9 to move upward inside the feed hopper 7 via the vertical box 10. The scraper box 8 adheres to the inner wall of the feed hopper 7 and pushes upward. Then, the telescopic end of the first electric push rod 11 is retracted, driving the scraper box 8 and the first airbag 9 to move downward inside the feed hopper 7 via the vertical box 10. The scraper box 8 adheres to the inner wall of the feed hopper 7 and pushes downward. The extension and retraction of the telescopic end of the first electric push rod 11 is repeated multiple times, and the scraper box 8 pushes up and down against the inner wall of the feed hopper 7 to prevent the slurry from adhering and accumulating on the inner wall of the feed hopper 7, further avoiding blockage. In addition, the up and down movement of the first airbag 9 is synchronized with the inflation and deflation operations, expanding the agitation area and improving the unblocking effect.

[0087] When there is a large amount of material being fed at any given time, in order to avoid excessive accumulation and affect the screening efficiency, the blower 12 is controlled to deliver air. The blower 12 delivers gas to the inside of the first air bag 9 through the first air duct 13 and the second air duct 15, so that the first air bag 9 is fully inflated, which isolates the feed hopper 7 and stops the feeding.

[0088] During the feeding process, the second solenoid valve 18 is opened, and the blower 12 delivers gas from the first air duct 13 and the third air duct 17 into the interior of the second airbag 19. (Refer to...) Figure 5 The wall thickness of the second airbag 19 near the feed trough 6 decreases from top to bottom, with greater deformation at the bottom than at the top. Therefore, the side of the second airbag 19 near the feed trough 6 is inclined. When the slurry enters the screen box 2 from the feed trough 6, the inclined surface of the second airbag 19 and the expansion thrust cause the slurry to shift to the left, acting as a guide. When the blower 12 draws gas from inside the second airbag 19 through the first air duct 13 and the third air duct 17, the second airbag 19 contracts, and the slurry falls vertically from the feed trough 6. The second airbag 19 switches between expansion and contraction, guiding the slurry and creating a shaking effect to prevent blockage at the connection between the screen 3 and the feed trough 6.

[0089] When vibrating and screening the slurry on screen 3, the extension end of the second electric push rod 24 is extended, driving the slide bar 23 to slide outward from the slide groove 22. The extension end of the second electric push rod 24 is retracted, driving the slide bar 23 to slide inward from the slide groove 22. This causes the swing bar 20 to stick to the screen 3 and push and scrape back and forth, accelerating the slurry agitation. The combination of vibrating screening and pushing and scraping screening improves the screening efficiency. At the same time, the swing bar 20 is wavy. When the swing bar 20 sticks to the screen 3 and pushes and scrapes back and forth, it causes the slurry to move irregularly, further increasing the screening speed.

Claims

1. A sieving device for porcelain insulator blanks, comprising a base frame (1), characterized in that: A screen box (2) is provided above the base frame (1). A screen cover (4) is fitted on the top of the screen box (2). The screen box (2) and the screen cover (4) are inclined. A feed chute (6) is provided on the top of the screen cover (4). The feed chute (6) is located at the upward inclined end of the screen cover (4). A feed hopper (7) is fixedly connected to the upper surface of the screen cover (4). The feed hopper (7) is correspondingly connected to the feed chute (6). A scraper box (8) is slidably arranged inside the feed hopper (7). The scraper box (8) is U-shaped and fits against the feed hopper (7). On the inner wall, a first airbag (9) is fixedly connected to the scraper box (8). The first airbag (9) is connected to the scraper box (8). The scraper box (8) drives the first airbag (9) to move up and down. The first airbag (9) switches between contraction and expansion to accelerate the feeding of slurry. At the same time, the scraper box (8) pushes and scrapes the inner wall of the feed hopper (7). A second airbag (19) is fixedly connected to the lower surface of the top of the screen cover (4). The wall thickness of the second airbag (19) on the side near the feed trough (6) decreases from top to bottom. When the second airbag (19) expands, it is used to guide the slurry. The top of the scraper box (8) is fixedly connected to a vertical box (10), which is inverted L-shaped. The vertical box (10) is connected to the scraper box (8). The upper surface of the sieve cover (4) is fixedly connected to a first electric push rod (11), and the top of the vertical box (10) is fixedly connected to the telescopic end of the first electric push rod (11). The top of the vertical box (10) is connected to a second air duct (15), and a first solenoid valve (16) is fixedly installed on the second air duct (15). The second airbag (19) is connected to a third air duct (17), and the end of the third air duct (17) away from the second airbag (19) extends to the outside of the screen cover (4). A second solenoid valve (18) is fixedly installed on the third air duct (17). The base frame (1) is provided with a wind power assembly that cooperates with the second air duct (15) and the third air duct (17). The wind power assembly includes a fan (12), a first air duct (13) and a three-way connector (14). The fan (12) is fixedly installed on the base frame (1). One end of the first air duct (13) is connected to the fan (12), and the other end of the first air duct (13) is connected to the three-way connector (14). The end of the second air duct (15) away from the vertical box (10) is connected to one of the joints of the three-way connector (14), and the end of the third air duct (17) away from the second airbag (19) is connected to the other joint of the three-way connector (14).

2. The porcelain insulator blank screening equipment according to claim 1, characterized in that: A screen (3) is fixedly connected inside the sieve box (2). A swing bar (20) is slidably arranged on the upper surface of the screen (3). A sliding groove (22) is opened on the side wall of the sieve box (2). A sliding strip (23) is slidably arranged inside the sliding groove (22). The swing bar (20) is fixedly connected to one end of the sliding strip (23) located inside the sieve box (2). A second electric push rod (24) is fixedly connected to the outer wall of the sieve box (2). The sliding strip (23) is fixedly connected to the telescopic end of the second electric push rod (24).

3. The porcelain insulator blank screening equipment according to claim 2, characterized in that: The bottom of the swing bar (20) is provided with a groove (21), and the groove (21) is provided in multiple ways and the multiple grooves (21) are evenly distributed.

4. The porcelain insulator blank screening equipment according to claim 3, characterized in that: The screen box (2) is connected to the first discharge cylinder (26) and the second discharge cylinder (27). Springs (25) are fixedly connected to the four corners of the bottom of the screen box (2). The bottom end of the springs (25) is fixedly connected to the base frame (1). A vibration motor (5) is installed at the bottom of the screen box (2).

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