Porcelain insulator blank sieving equipment and sieving method

Abstract

The invention discloses porcelain insulator blank sieving equipment and a sieving method, and relates to the technical field of porcelain insulator processing.The porcelain insulator blank sieving method comprises the following operation steps that S1, water and raw materials for manufacturing blanks are mixed, pulped and subjected to ball milling treatment, and slurry is obtained; s2, the slurry is subjected to screening, iron removal, mud squeezing and pugging treatment, and pug is obtained; s21, during screening and feeding, slurry is subjected to shaking treatment; s22, guiding the slurry to reduce accumulation; s3, the pug is subjected to electric shade drying, cutting and drying, and a blank is obtained; s4, performing glazing treatment on the blank, wherein the glazing treatment sequentially comprises preheating, glazing and drying; and S5, putting the blank into a furnace to be sintered into a porcelain body, and installing a hardware fitting on the porcelain body to obtain the insulator. According to the porcelain insulator blank sieving equipment and the sieving method, the processing and manufacturing efficiency of an electric porcelain insulator is improved by arranging the operations of auxiliary sieving feeding, preheating, drying and the like.

Description

Technical Field

[0001] The invention relates to the technical field of porcelain insulator processing, and in particular to a porcelain insulator blank screening device and a screening method. Background Art

[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 of different potentials or between conductors and ground potential components. They can withstand voltage and mechanical stress and are a special type of insulating control.

[0003] In the prior art, when porcelain insulators are processed and manufactured, since the porcelain insulator slurry has a certain viscosity, the sieve feed is easily blocked and usually has to be cleaned manually, which affects the feed speed. In addition, there is a lack of preheating step before glazing, which reduces the processing efficiency of the porcelain insulators.

[0004] Therefore, it is necessary to propose a porcelain insulator blank screening device and a screening method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a screening device and a screening method for porcelain insulator blanks, so as to solve the problems in the prior art that, during the processing and manufacturing of electric porcelain insulators, the sieving feed is easily blocked due to the certain viscosity of the porcelain insulator slurry, and is usually cleaned manually, which affects the feeding speed, and there is a lack of a preheating step before glazing, which reduces the processing efficiency of the electric porcelain insulators.

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

[0007] S1, mixing water with raw materials for making blanks, beating and ball milling to obtain slurry;

[0008] S2, screening, iron removal, mud pressing and mud kneading the slurry to obtain mud material;

[0009] S21, when screening and feeding, the slurry is shaken;

[0010] S22, the slurry is guided to reduce accumulation;

[0011] S23, combining vibration screening with push-scrape screening;

[0012] S3, subjecting the clay material to electric drying, cutting, and drying to obtain a blank;

[0013] S4, the blank is glazed, which includes: preheating, glazing and drying;

[0014] S5. Put the blank into a furnace to burn it into a porcelain body, and install hardware on the porcelain body to obtain an insulator.

[0015] Preferably, when the blank is glazed, a heating device is used for preheating and drying, and the heating device includes a heating box, a mounting plate is fixedly connected to the interior of the heating box, a driving motor is fixedly connected to the bottom of the mounting plate, a circular hole is provided on the mounting plate for the driving shaft of the driving motor to pass through, a tray is fixedly connected to the driving shaft of the driving motor, an air box is fixedly connected to an inner wall on one side of the heating box, an air outlet slot is provided on the air box, a support block is fixedly connected to the bottom end of the air box, 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, a torsion spring is mounted on the round rod, a strip plate is fixedly connected to the bottom end 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] The present invention also discloses a porcelain insulator blank screening device, which is applied to the above-mentioned porcelain insulator blank screening method, and also includes a base frame, a screen box is arranged above the base frame, and a screen cover is matched on the top of the screen box, the screen box and the screen cover are inclined, and a feed trough is opened on the top of the screen cover, and the feed trough is located at an end of the screen cover that is inclined upward, and a feed hopper is fixedly connected to the upper surface of the screen cover, and the feed hopper is correspondingly connected to the feed trough, and a scraper box is slidably arranged inside the feed hopper, the scraper box is in a mouth shape, and the scraper box is attached to the inner wall of the feed hopper, and a first airbag is fixedly connected to the scraper box, and the first airbag is connected to the scraper box, and the scraper box drives the first airbag to move up and down, and the first airbag switches between contraction and expansion for accelerating slurry feeding, and at the same time, the scraper box pushes and scrapes the inner wall of the feed hopper, and a second airbag is fixedly connected to the lower surface of the top of the screen cover, and the wall thickness of the second airbag close to the feed trough decreases from top to bottom, and when the second airbag expands, it is used to guide the slurry.

[0017] Preferably, a vertical box is fixedly connected to the top of the scraper box, the vertical box is in an inverted L shape, the vertical box is communicated with the scraper box, the upper surface of the screen cover is fixedly connected to a first electric push rod, and the top end 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, the second air bag is connected to a third air duct, one end of the third air duct away from the second air bag extends to the outside of the sieve cover, and a second solenoid valve is fixedly mounted on the third air duct.

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

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

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

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

[0024] Technical effects and advantages of the present invention:

[0025] 1. The present invention improves the efficiency of manufacturing electric porcelain insulators by providing auxiliary sieving, feeding, preheating, drying and other operations;

[0026] 2. The present invention provides a scraper box, a first airbag and other structures. The first airbag moves up and down synchronously with the shaking to expand the stirring area. At the same time, the scraper box is attached to the inner wall of the feed hopper to push and scrape, thereby avoiding blockage and improving the use efficiency of the porcelain insulator blank screening equipment.

[0027] 3. The second airbag switches between expansion and contraction, plays the role of slurry guidance, and produces a shaking effect to avoid accumulation and blockage at the connection between the screen and the feed trough;

[0028] 4. After screening, when cleaning the feed hopper, the scraper box can be pressed against the inner wall of the feed hopper to scrape and assist in cleaning;

[0029] 5. The swing bar is attached to the screen and pushes and scrapes back and forth to speed up the turning of the blank. The vibration screening is combined with the push and scrape screening to improve the screening efficiency.

[0030] 6. The swing bar is wavy. When the swing bar is pressed against the screen and scraped back and forth, the slurry moves irregularly, further increasing the screening speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a flow chart of the method for screening porcelain insulator blanks.

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

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

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

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

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

[0037] Figure 7 It is a schematic diagram of the structure of the feed hopper and the first air bag of the present invention.

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

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

[0040] Fig.10 For the present invention Figure 8 Enlarged schematic diagram of the structure at D in the middle

[0041] Fig.11 It is a schematic diagram of the screen box and screen structure of the present invention.

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

[0043] In the figure: 1, base frame; 2, screen box; 3, screen; 4, screen cover; 5, vibration motor; 6, feed trough; 7, feed hopper; 8, scraper box; 9, first air bag; 10, vertical box; 11, first electric push rod; 12, fan; 13, first air duct; 14, three-way joint; 15, second air duct; 16, first solenoid valve; 17, third air duct; 18, second solenoid valve; 19, second air bag; 20, swing bar; 21, groove; 22, slide; 23, slide; 24, second electric push rod; 25, spring; 26, first discharge barrel; 27, second discharge barrel; 28, heating box; 29, mounting plate; 30, tray; 31, wind box; 32, air outlet trough; 33, support block; 34, round rod; 35, elastic strip; 36, torsion spring; 37, strip plate; 38, bump; 39, drive motor. DETAILED DESCRIPTION

[0044] The present invention provides Figures 1 to 4 A method for screening porcelain insulator blanks is shown, comprising the following steps:

[0045] S1, mixing water with raw materials for making blanks, beating and ball milling to obtain slurry;

[0046] S2, screening, iron removal, mud pressing and mud kneading the slurry to obtain mud material;

[0047] S21, when screening and feeding, the slurry is shaken;

[0048] S22, the slurry is guided to reduce accumulation;

[0049] S23, combining vibration screening with push-scrape screening;

[0050] S3, subjecting the clay material to electric drying, cutting, and drying to obtain a blank;

[0051] S4, the blank is glazed, which includes: preheating, glazing and drying;

[0052] S5. Put the blank into a furnace to burn it into a porcelain body, and install hardware on the porcelain body to obtain an insulator.

[0053] When the blank is glazed, heating equipment is used for preheating and drying.

[0054] The heating device includes a heating box 28, and is provided with a door panel (not shown in the figure). A mounting plate 29 is fixedly connected to the interior of the heating box 28, and a driving motor 39 is fixedly connected to the bottom of the mounting plate 29. A circular hole for the driving shaft of the driving motor 39 to pass through is opened on the mounting plate 29, and a tray 30 is fixedly connected to the driving shaft of the driving motor 39. When in use, the blank is placed on the tray 30, and the driving motor 39 drives the blank to rotate through the tray 30. A clamping assembly can also be provided on the tray 30 to fix the blank. The clamping assembly includes structures such as a clamping plate to improve the stability of the blank rotation.

[0055] A wind box 31 is fixedly connected to the inner wall of one side of the heating box 28. An air outlet slot 32 is opened on the wind box 31, and the wind box 31 is connected to the high-temperature gas air supply duct of the factory. The side of the heating box 28 away from the wind box 31 is connected to the factory's suction duct, forming a high-temperature airflow inside the heating box 28, thereby facilitating preheating and drying operations.

[0056] In order to expand the air supply area, a support block 33 is fixedly connected to the bottom end of the air box 31, and a round rod 34 is rotatably connected to the support block 33. The round rod 34 is distributed corresponding to the air outlet slots 32, and an elastic strip 35 is fixedly connected to the round rod 34. There are multiple elastic strips 35. A torsion spring 36 is set on the round rod 34, one end of the torsion spring 36 is fixedly connected to the support block 33, and the other end of the torsion spring 36 is fixedly connected to the round rod 34. A strip board 37 is fixedly connected to the bottom end of the round rod 34, and a protrusion 38 is fixedly connected to the outer ring of the tray 30. There are multiple protrusions 38, which are evenly distributed around the tray 30, and the protrusions 38 cooperate with the strip board 37.

[0057] During preheating, the blank is placed on the tray 30, and the driving motor 39 drives the blank to rotate through the tray 30, and the wind box 31 and the air outlet slot 32 transport high-temperature gas to the blank, forming a high-temperature airflow inside the heating box 28 to preheat the blank, which helps the glaze to adhere to the blank better, reduces the risk of peeling or cracking, and improves the yield rate; when the protrusion 38 contacts the strip plate 37, it will squeeze the strip plate 37 to swing, and the elastic strip 35 will swing synchronously, and when the protrusion 38 is staggered from the strip plate 37, the restoring force of the torsion spring 36 causes the strip plate 37 to reset, and the elastic strip 35 to reset synchronously. As the tray 30 continues to rotate, the elastic strip 35 shows a reciprocating swinging effect, stirring the high-temperature gas blown out from the air outlet slot 32, thereby expanding the range of action.

[0058] When drying, the above steps are followed, and the glaze is first naturally dried to ensure that the glaze does not drip, and then placed on a tray 30 for drying. The high-temperature airflow inside the heating box 28 accelerates the drying speed.

[0059] The present invention provides Figures 5 to 12The porcelain insulator blank screening equipment shown in the figure also includes a base frame 1, which is fixedly installed on the ground. A screen box 2 is arranged above the base frame 1, and a screen mesh 3 is fixedly connected to the inside of the screen box 2. A screen cover 4 is matched with the top of the screen box 2. The screen box 2, the screen mesh 3 and the screen cover 4 are arranged obliquely. A feed trough 6 is opened on the top of the screen cover 4. The feed trough 6 is located at one end of the screen cover 4 that is inclined upward. A feed hopper 7 is fixedly connected to the upper surface of the screen cover 4, and the feed hopper 7 is correspondingly connected to the feed trough 6.

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

[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 an operator or a feeding device, which includes a conveying pipe and other structures. The feeding device is a common existing technology and will not be described in detail here.

[0062] The slurry enters the screen box 2 from the feed trough 6 and falls on the screen 3; at the same time, the vibration motor 5 is started, so that the screen box 2, the screen 3, etc. begin to vibrate, and the screen 3 is set at an angle, so that the slurry on the screen 3 is vibrated and screened. The slurry is screened by the screen 3, and 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 barrel 27; the smaller slurry particles fall downward through the sieve holes of the screen 3 to the bottom of the screen box 2, and finally be discharged outward through the first discharge barrel 26.

[0063] Taking into account that the porcelain insulator slurry has a certain viscosity, it is easy to get blocked during feeding and is usually cleaned manually. In order to improve the screening efficiency, a scraper box 8 is slidably arranged inside the feed hopper 7. The scraper box 8 is in a mouth shape and is attached to the inner wall of the feed hopper 7. The scraper box 8 is attached to the inner wall of the feed hopper 7 to push and scrape, so as to prevent the slurry from adhering and accumulating on the inner wall of the feed hopper 7, thereby avoiding blockage caused by continuous accumulation.

[0064] After the screening is completed, when the feed hopper 7 is cleaned, the scraper box 8 can be attached to the inner wall of the feed hopper 7 to push and scrape to assist in cleaning.

[0065] The top of the scraper box 8 is fixedly connected with a vertical box 10, which is in an inverted L shape and communicates with the scraper box 8. The upper surface of the screen cover 4 is fixedly connected with 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 scraper box 8 is driven to move up and down inside the feed hopper 7 by the first electric push rod 11 and the vertical box 10.

[0066] The scraper box 8 is fixedly connected with the first airbag 9, which is in communication with the scraper box 8. The top of the vertical box 10 is in communication with the second air duct 15, and the second air duct 15 is a telescopic hose, which does not affect the up and down movement of the vertical box 10. The first solenoid valve 16 is fixedly installed on the second air duct 15. Specifically, gas is delivered into the first airbag 9 to inflate and expand the first airbag 9; the gas inside the first airbag 9 is sucked to exhaust and shrink the first airbag 9. The inflation and exhaust operations are repeated many times, and the first airbag 9 will produce a shaking effect, which can stir the slurry inside the feed hopper 7.

[0067] The lower surface of the top of the screen cover 4 is fixedly connected with a second airbag 19. The wall thickness of the second airbag 19 close to the feed trough 6 decreases from top to bottom. When the second airbag 19 is expanded, it is used to guide the slurry. Figure 5 The wall thickness of the second air bag 19 on the side close to the feed trough 6 decreases from top to bottom. When inflated, the deformation degree of the bottom end near the feed trough 6 will be greater than that of the top end. The second air bag 19 is connected to the third air duct 17. The end of the third air duct 17 away from the second air bag 19 extends to the outside of the sieve cover 4. The third air duct 17 is fixedly installed with a second solenoid valve 18.

[0068] 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, and the wind power assembly includes a fan 12, a first air duct 13 and a three-way joint 14. The fan 12 is fixedly mounted on the base frame 1, and the fan 12 can switch between air supply and suction. One end of the first air duct 13 is connected to the fan 12, the other end of the first air duct 13 is connected to the three-way joint 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 joint 14, and the end of the third air duct 17 away from the second air bag 19 is connected to the other joint of the three-way joint 14.

[0069] In actual use, during the process of feeding from the feed hopper 7 and the feed trough 6 to the interior of the screen box 2, the fan 12 is started, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, and the air supply operation of the fan 12 is controlled. The fan 12 transports gas to the interior of the first air bag 9 through the first air duct 13, the second air duct 15, the vertical box 10 and the scraper box 8, so that the first air bag 9 is inflated and expanded; then the fan 12 is controlled to operate in suction. The fan 12 sucks the gas inside the first air bag 9 through the first air duct 13, the second air duct 15, the vertical box 10 and the scraper box 8, so that the first air bag 9 is exhausted and shrinks.

[0070] According to the above steps, the inflation and exhaust operations are repeated for multiple times, so that the first airbag 9 produces a shaking effect, stirring the slurry inside the feed hopper 7 to avoid blockage.

[0071] At the same time, the telescopic end of the first electric push rod 11 is controlled to extend, and the scraper box 8 and the first air bag 9 are driven to move upward inside the feed hopper 7 through the vertical box 10, and the scraper box 8 is attached to the inner wall of the feed hopper 7 to push and scrape upward; then the telescopic end of the first electric push rod 11 is controlled to be retracted, and the scraper box 8 and the first air bag 9 are driven to move downward inside the feed hopper 7 through the vertical box 10, and the scraper box 8 is attached to the inner wall of the feed hopper 7 to push and scrape downward, and the telescopic end of the first electric push rod 11 is extended and retracted repeatedly for many times, 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 to and accumulating on the inner wall of the feed hopper 7, thereby further avoiding blockage.

[0072] In addition, the up and down movement of the first airbag 9 is synchronized with the inflation and exhaust operations, thereby expanding the stirring area and improving the dredging effect.

[0073] By setting up structures such as the scraper box 8 and the first air bag 9, the first air bag 9 moves up and down synchronously with the shaking to expand the stirring area. At the same time, the scraper box 8 is pressed against the inner wall of the feed hopper 7 to push and scrape to avoid blockage, thereby improving the use efficiency of the porcelain insulator slurry screening equipment.

[0074] When the instantaneous feed is large, in order to avoid excessive accumulation affecting the screening efficiency, the air supply operation of the fan 12 is controlled, and the fan 12 transports 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 expanded, the feed hopper 7 is isolated, and the feeding is stopped.

[0075] During specific use, a pressure sensor may be arranged 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 fan 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 on the side close to the feed trough 6 decreases from top to bottom, and the deformation degree of the bottom end is greater than that of the top end. Therefore, the side of the second airbag 19 close to 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 deviate to the left side, play a guiding role, expand the range of the slurry falling on the screen 3, and is not easy to accumulate.

[0078] When the fan 12 sucks the gas inside the second air bag 19 through the first air duct 13 and the third air duct 17 , the second air bag 19 shrinks and becomes smaller, and the slurry falls vertically from the feed trough 6 .

[0079] The second airbag 19 switches between expansion and contraction to guide the slurry and produce a shaking effect to avoid accumulation and blockage at the connection between the screen 3 and the feed trough 6.

[0080] A swing bar 20 is slidably provided on the upper surface of the screen 3, a slide groove 22 is provided on the side wall of the screen box 2, a slide bar 23 is slidably provided inside the slide 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] A groove 21 is provided at the bottom of the swing bar 20. There are multiple grooves 21, and the multiple grooves 21 are evenly distributed. The multiple grooves 21 make the bottom end of the swing bar 20 serrated, which is convenient for moving the slurry.

[0082] The swing bar 20 is wavy in shape, which enlarges the contact area with the slurry and makes the slurry move irregularly.

[0083] When the slurry on the screen 3 is vibrated and screened, the telescopic end of the second electric push rod 24 is controlled to extend, driving the slide bar 23 to slide outward from the slide groove 22, and the telescopic end of the second electric push rod 24 is controlled to be retracted, driving the slide bar 23 to slide inward from the slide groove 22, so that the swing bar 20 fits on the screen 3 and pushes and scrapes back and forth, accelerating the turning of the slurry, combining vibration screening with push-scraping screening, and improving the screening efficiency.

[0084] At the same time, the swing bar 20 is wavy. When the swing bar 20 is pressed against the screen 3 and pushed and scraped back and forth, the slurry moves irregularly, further improving the screening speed.

[0085] Working principle: the operator or the loading device conveys the slurry to the inside of the feed hopper 7, the slurry enters the screen box 2 through the feed trough 6, and falls on the screen 3; at the same time, the vibration motor 5 is started, so that the screen box 2, the screen 3, etc. begin to vibrate, and the screen 3 is set at an angle, so as to perform vibration screening on the slurry on the screen 3. The slurry is screened by the screen 3, and the larger slurry particles will reach the end away from the feed hopper 7 along the screen 3, and finally be discharged outwardly through the second discharge barrel 27; the smaller slurry particles fall downward through the sieve holes of the screen 3 to the bottom of the screen box 2, and finally be discharged outwardly through the first discharge barrel 26.

[0086] During the process of feeding from the feed hopper 7 and the feed trough 6 to the interior of the screen box 2, the fan 12 is started, the first solenoid valve 16 is opened, the second solenoid valve 18 is closed, and the air supply operation of the fan 12 is controlled. The fan 12 transports gas to the interior of the first air bag 9 through the first air duct 13, the second air duct 15, the vertical box 10 and the scraper box 8, so that the first air bag 9 is inflated and expanded; then the fan 12 is controlled to suction. The fan 12 sucks the gas inside the first air bag 9 through the first air duct 13, the second air duct 15, the vertical box 10 and the scraper box 8, so that the first air bag 9 is exhausted and shrinks; according to the above steps, the inflation and exhaust operations are repeated many times, so that the first air bag 9 produces a shaking effect, and the slurry inside the feed hopper 7 is stirred to avoid blockage. At the same time, the telescopic end of the first electric push rod 11 is controlled to extend, and the scraper box 8 and the first air bag 9 are driven to move upward inside the feed hopper 7 through the vertical box 10, and the scraper box 8 is attached to the inner wall of the feed hopper 7 to push and scrape upward; then the telescopic end of the first electric push rod 11 is controlled to be retracted, and the scraper box 8 and the first air bag 9 are driven to move downward inside the feed hopper 7 through the vertical box 10, and the scraper box 8 is attached to the inner wall of the feed hopper 7 to push and scrape downward, and the telescopic end of the first electric push rod 11 is extended and retracted repeatedly for many times, 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 to and accumulating on the inner wall of the feed hopper 7, thereby further avoiding blockage; in addition, the up and down movement of the first air bag 9 is synchronized with the inflation and exhaust operations to expand the stirring area and improve the dredging effect.

[0087] When the instantaneous feed is large, in order to avoid excessive accumulation affecting the screening efficiency, the air supply operation of the fan 12 is controlled, and the fan 12 transports 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 expanded, the feed hopper 7 is isolated, and the feeding is stopped.

[0088] During the feeding process, the second solenoid valve 18 is opened, and the fan 12 delivers gas to the interior of the second air bag 19 through the first air duct 13 and the third air duct 17. Figure 5 The wall thickness of the second airbag 19 near the feed trough 6 decreases from top to bottom, and the deformation degree of the bottom end is greater than that of the top end. 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, the slurry will move to the left under the action of the inclined surface and expansion thrust of the second airbag 19, playing a guiding role; when the fan 12 sucks the gas inside the second airbag 19 through the first air duct 13 and the third air duct 17, the second airbag 19 shrinks and becomes smaller, and the slurry falls vertically from the feed trough 6. The second airbag 19 switches between expansion and contraction, plays a role in guiding the slurry, and produces a shaking effect to avoid accumulation and blockage at the connection between the screen 3 and the feed trough 6.

[0089] When the slurry on the screen 3 is vibrated and screened, the telescopic end of the second electric push rod 24 is controlled to extend, driving the slide bar 23 to slide outward from the slide groove 22, and the telescopic end of the second electric push rod 24 is controlled to be retracted, driving the slide bar 23 to slide inward from the slide groove 22, so that the swing bar 20 is pressed against the screen 3 to push and scrape back and forth, thereby accelerating the turning of the slurry, combining vibration screening with push and scrape screening, and improving the screening efficiency; at the same time, the swing bar 20 is wavy, and when the swing bar 20 is pressed against the screen 3 to push and scrape back and forth, the slurry moves irregularly, further improving the screening speed.

Claims

1. A method for screening porcelain insulator blanks, characterized in that: The steps include: S1, mixing water with raw materials for making blanks, beating and ball milling to obtain slurry; S2, screening, iron removal, mud pressing and mud kneading the slurry to obtain mud material; S21, when screening and feeding, the slurry is shaken; S22, the slurry is guided to reduce accumulation; S23, combining vibration screening with push-scrape screening; S3, subjecting the clay material to electric drying, cutting, and drying to obtain a blank; S4, the blank is glazed, which includes: preheating, glazing and drying; S5. Put the blank into a furnace to burn it into a porcelain body, and install hardware on the porcelain body to obtain an insulator.

2. A method for screening porcelain insulator blanks according to claim 1, characterized in that: When the blank is glazed, a heating device is used for preheating and drying. The heating device includes a heating box (28). A mounting plate (29) is fixedly connected to the interior of the heating box (28). A driving motor (39) is fixedly connected to the bottom of the mounting plate (29). A circular hole is provided on the mounting plate (29) for the driving shaft of the driving motor (39) to pass through. A tray (30) is fixedly connected to the driving shaft of the driving motor (39). A wind box (31) is fixedly connected to the inner wall of one side of the heating box (28). An air outlet slot (32) is provided, the bottom end of the air box (31) is fixedly connected to a support block (33), a round rod (34) is rotatably connected to the support block (33), the round rod (34) is distributed correspondingly to the air outlet slot (32), an elastic strip (35) is fixedly connected to the round rod (34), a torsion spring (36) is sleeved on the round rod (34), a strip plate (37) is fixedly connected to the bottom end of the round rod (34), and a convex block (38) is fixedly connected to the outer ring of the tray (30), and the convex block (38) cooperates with the strip plate (37).

3. A porcelain insulator blank screening device, applied to the porcelain insulator blank screening method according to any one of claims 1 to 2, further comprising a base frame (1), characterized in that: A screen box (2) is arranged above the base frame (1), and a screen cover (4) is arranged on the top of the screen box (2). The screen box (2) and the screen cover (4) are arranged in an inclined manner. A feed trough (6) is arranged on the top of the screen cover (4), and the feed trough (6) is located at one end of the screen cover (4) that is inclined upward. A feed hopper (7) is fixedly connected to the upper surface of the screen cover (4), and the feed hopper (7) is correspondingly connected to the feed trough (6). A scraper box (8) is slidably arranged inside the feed hopper (7), and the scraper box (8) is in a mouth shape and fits on 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 communicated with the scraper box (8), the scraper box (8) drives the first airbag (9) to move up and down, and the first airbag (9) switches between contraction and expansion to accelerate the slurry feeding, and at the same time the scraper box (8) pushes and scrapes the inner wall of the feed hopper (7), and a second airbag (19) is fixedly connected to the lower surface of the top of the screen cover (4), and the wall thickness of the second airbag (19) close to the feed trough (6) decreases from top to bottom. When the second airbag (19) expands, it is used to guide the slurry.

4. The porcelain insulator blank screening device according to claim 3 is characterized in that: The top of the scraper box (8) is fixedly connected to a vertical box (10), the vertical box (10) is in an inverted L shape, and the vertical box (10) is communicated with the scraper box (8). The upper surface of the screen cover (4) is fixedly connected to a first electric push rod (11), and the top end of the vertical box (10) is fixedly connected to the telescopic end of the first electric push rod (11).

5. The porcelain insulator blank screening device according to claim 4, characterized in that: The top of the vertical box (10) is connected to a second air duct (15), and a first solenoid valve (16) is fixedly mounted on the second air duct (15).

6. The porcelain insulator blank screening device according to claim 5, characterized in that: The second air bag (19) is connected to a third air duct (17), one end of the third air duct (17) away from the second air bag (19) extends to the outside of the sieve cover (4), and a second solenoid valve (18) is fixedly mounted on the third air duct (17).

7. The porcelain insulator blank screening device according to claim 6, characterized in that: The base frame (1) is provided with a wind power component that cooperates with the second air duct (15) and the third air duct (17), and the wind power component comprises a fan (12), a first air duct (13) and a three-way joint (14); the fan (12) is fixedly mounted on the base frame (1); one end of the first air duct (13) is connected to the fan (12); the other end of the first air duct (13) is connected to the three-way joint (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 joint (14); the end of the third air duct (17) away from the second air bag (19) is connected to the other joint of the three-way joint (14).

8. The porcelain insulator blank screening device according to claim 3, characterized in that: A screen (3) is fixedly connected to the inside of the screen box (2), and a swing bar (20) is slidably arranged on the upper surface of the screen (3). A slide groove (22) is opened on the side wall of the screen box (2), and a slide bar (23) is slidably arranged inside the slide groove (22). The swing bar (20) is fixedly connected to one end of the slide bar (23) located inside the screen box (2), and 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).

9. The porcelain insulator blank screening device according to claim 8, characterized in that: A groove (21) is provided at the bottom of the swing bar (20), and the groove (21) is provided in plurality, and the plurality of grooves (21) are evenly distributed.

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

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