A screening device and screening method

Abstract

The present invention discloses a sifter and a screening method, comprising a cover body, a seat body, a sieve plate fixedly mounted on the seat body, the sieve plate inserted into the seat body, the sieve plate provided with a plurality of sieve holes, a pressing plate mounted on the cover body, the pressing plate located above the sieve plate, the pressing plate connected with a sliding sleeve, the sliding sleeve provided with a second channel, a material tray mounted on the cover body, the material tray provided with a first channel, a conduit connected to the bottom of the material tray, the cover body comprising a plate body, the plate body provided with a feed port, the feed port aligned with the first channel, the first channel communicated with the second channel, the second channel communicated with the sieve hole, a discharge port provided at the bottom of the seat body, the discharge port communicated with the sieve hole; and a guide plate located below the sieve plate, a protrusion provided at the upper end of the guide plate, the protrusion and the sieve hole arranged one-to-one, the guide plate can move up and down, when the guide plate is located at the upper extreme position, the protrusion is inserted into the sieve hole, the upper end surface of the protrusion is flush with the upper end surface of the sieve plate. The present invention provides a sifter and a screening method, which can crush the larger solid particles removed by screening, thereby improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of screening technology, and in particular to a screening device and a screening method. Background Art

[0002] At present, the raw material of iron oxide color paste, iron oxide powder, needs to use pyrite in the preparation process. Pyrite is brittle. Since the raw material particles of pyrite vary in size, it needs to be screened to screen out particles smaller than the standard value for the next process. The standard value is set at about 10mm. In the current screening equipment, after screening out pyrite larger than the standard value, it needs to be taken out and crushed, which is inconvenient. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a sieving device and a sieving method, which can crush the larger solid particles removed by sieving, thereby improving production efficiency.

[0004] The invention discloses a sifter, comprising a cover body and a base body. A sieve plate is fixedly mounted on the base body, the sieve plate is inserted into the base body, the sieve plate is provided with a plurality of sieve holes, a pressure plate is mounted on the cover body, the pressure plate is located above the sieve plate, the pressure plate can move up and down, the pressure plate can be close to the sieve plate, a sliding sleeve is connected to the pressure plate, the sliding sleeve is provided with a channel two, a material tray is also mounted on the cover body, the material tray is provided with a channel one, a conduit is connected to the bottom of the material tray, the cover body comprises a disc body, the disc body is provided with a feed port, the feed port is aligned with the channel one, the channel one is connected with the channel two through the conduit, the channel two is connected with the sieve holes, a discharge port is provided at the bottom of the base body, and the discharge port is connected with the sieve holes; the guide plate is also included, the guide plate is located below the sieve plate, a protrusion is provided on the upper end of the guide plate, the protrusion is arranged in a one-to-one correspondence with the sieve holes, the guide plate can move up and down, when the guide plate is at the upper extreme position, the protrusion is inserted into the sieve holes, and the upper end surface of the protrusion is flush with the upper end surface of the sieve plate.

[0005] Furthermore, the outer diameter of the protrusion is the same as the inner diameter of the sieve hole.

[0006] Furthermore, the guide plate is provided with a plurality of guide holes, and the guide holes penetrate the guide plate up and down so that the sieve hole can be connected with the discharge port.

[0007] Furthermore, the inner wall of the seat body is connected with a guide sleeve through a bearing, the guide sleeve can rotate along its own axis, the guide sleeve is fixedly connected to the cover body, the guide sleeve is installed with a support frame, and the support frame is installed with a material tray.

[0008] Furthermore, the outer wall of the sliding sleeve is slidably connected to the inner wall of the pressure plate, a sleeve seat is installed on the upper end of the pressure plate, the sliding sleeve is sleeved with a spring, the spring is located in the sleeve seat, the upper end of the spring abuts against the upper wall of the sleeve seat, the lower end of the spring abuts against a ring body, the ring body is fixed to the sliding sleeve, and a scraper strip is connected to the bottom of the sliding sleeve, and the scraper strip abuts against the upper end of the screen plate.

[0009] Further, the scraper strip includes an extension portion located at the bottom, and the extension portion can extend into the sieve hole.

[0010] Furthermore, a groove is provided at the bottom of the pressing plate, and the scraper strip can be inserted into the groove.

[0011] The present invention also discloses a screening method, using a screening device, comprising the following steps:

[0012] S1: Screening

[0013] ① The pressing plate moves to the upper limit position, and the guide plate moves to the lower limit position. The solid particles to be screened are injected into the channel 1 of the material tray. The solid particles enter the screening space between the pressing plate and the screen plate along the guide tube and channel 2. The solid particles smaller than the sieve hole diameter are screened through the sieve hole and discharged downward along the guide hole and the discharge port;

[0014] S2: Crushing

[0015] ② The guide plate moves upward, the protrusion of the guide plate is inserted into the sieve hole, the sieve hole is closed, and the pressing plate moves downward close to the sieve plate. As the pressing plate rotates, the pressing plate and the sieve plate crush the solid particles between them and crush them into small particles, and then repeat step S to discharge the material.

[0016] Beneficial effects of the present invention:

[0017] 1. Through the rolling effect caused by the upward and downward squeezing of the pressing plate and the screen plate and the rotation of the pressing plate, the particles with larger outer diameter can be directly crushed during the screening process. After crushing, they are directly dropped through the screen holes through vibration and stirring of the scraper, thereby improving production efficiency.

[0018] 2. The bottom surface of the extension part is set as a spherical surface. The extension part can extend into or out of the sieve hole as the scraper bar rotates, so that some solid particles stuck in the sieve hole are squeezed by the extension part and fall out of the sieve hole, thereby reducing the clogging of the sieve hole and reducing the frequency of cleaning the sieve hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of an embodiment;

[0020] Figure 2 A cross-sectional view of an embodiment Figure 1 ;

[0021] Figure 3 for Figure 2 The enlarged view of point B in the middle;

[0022] Figure 4 The position distribution diagram of the sieve plate and the scraper strip in the embodiment;

[0023] Figure 5 A cross-sectional view of an embodiment Figure 2 ;

[0024] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0025] Figure 7 It is a diagram showing the coordination between the scraper strip and the sieve plate in the embodiment.

[0026] Figure numerals: cover body 1, disc body 11, feed port 111, guide sleeve 12, bearing 121, support frame 13, connector 131, feed tray 14, channel 1 141, conduit 15, seat body 2, bottom plate 21, discharge port 211, cylinder 1 22, motor 3, pressure plate 4, groove 41, through hole 42, sliding sleeve 5, extension rod 51, channel 2 52, scraper strip 53, extension part 531, ring body 54, sleeve seat 6, spring 61, cylinder 7, guide plate 8, protrusion 81, guide hole 82, sieve plate 9, sieve hole 91. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] like Figure 1 , Figure 2 As shown, a screener includes a cover body 1, a base body 2, and a motor 3. The cover body 1 and the base body 2 are arranged up and down, and the cover body 1 can rotate along its own axis. The cover body 1 includes a disc body 11 located at the top, and the disc body 11 is provided with a feed port 111, and the feed port 111 axially penetrates the disc body 11. The motor 3 is located above the disc body 11, and the output shaft of the motor 3 is inserted into the disc body 11 and connected by a key. The disc body 11 is driven by the motor 3 to rotate around its own axis. Figure 2 In the embodiment, an oil cylinder 7 is installed at the bottom of the disc body 11, and an oil pipe connected to the oil cylinder 7 is connected to a swivel joint to prevent the oil pipe from being wound when the oil cylinder 7 rotates with the disc body 11.

[0029] like Figure 2 As shown, the inner wall of the seat body 2 is connected to a guide sleeve 12 through a bearing 121. The guide sleeve 12 can rotate along its own axis. The guide sleeve 12 is fixedly connected to the inner wall of the cover body 1. The guide sleeve 12 is installed with a support frame 13. A material tray 14 is installed on the upper end of the support frame 13. The material tray 14 is provided with a channel 141. The feed port 111 is aligned with the channel 141, and solid particles are poured into the upper end of the feed port 111. The bottom of the material tray 14 is connected to a conduit 15.

[0030] like Figure 5 , Figure 6As shown, the support frame 13 is fixedly installed with a connecting piece 131, and the connecting piece 131 is fixedly installed with a sliding sleeve 5. A second channel 52 is provided on both sides of the sliding sleeve 5. The second channel 52 passes through the sliding sleeve 5 from top to bottom, and the conduit 15 is inserted into the second channel 52. The sliding sleeve 5 includes an extension rod 51 at the bottom, and a scraper strip 53 is installed at the bottom of the extension rod 51. Figure 4 , the scraper strip 53 is a long strip structure.

[0031] like Figure 5 , Figure 6 As shown, the outer wall of the sliding sleeve 5 is slidably connected with a pressing plate 4, the pressing plate 4 is provided with a through hole 42, the sliding sleeve 5 is inserted into the through hole 42, the upper end of the pressing plate 4 is installed with a sleeve seat 6, the sliding sleeve 5 is sleeved with a spring 61, the spring 61 is located in the sleeve seat 6, the upper end of the spring 61 abuts against the upper wall of the sleeve seat 6, the lower end of the spring 61 abuts against a ring body 54, the ring body 54 is fixed to the sliding sleeve 5, and the scraper strip 53 abuts against the upper end of the screen plate 9. A groove 41 is provided at the bottom of the pressing plate 4, and the scraper strip 53 can be inserted into the groove 41.

[0032] The pressing plate 4 is inserted into the guide sleeve 12, the inner wall of the guide sleeve 12 is provided with a groove, and the outer wall of the pressing plate 4 is provided with a corresponding protrusion. The protrusion of the pressing plate 4 is inserted into the groove of the guide sleeve 12, so that when the guide sleeve 12 rotates, it can drive the pressing plate 4 to rotate synchronously, and at the same time, the pressing plate 4 can move up and down along the inner wall of the guide sleeve 12.

[0033] like Figure 5 As shown, a sieve plate 9 is fixedly installed on the inner wall of the seat body 2, and the sieve plate 9 is inserted into the seat body 2. The sieve plate 9 is a circular plate structure, and the surface of the sieve plate 9 is perpendicular to the axis of the seat body 2. Figure 3 , Figure 6 The sieve plate 9 is provided with a plurality of sieve holes 91, and the sieve holes 91 axially penetrate the sieve plate 9. The seat body 2 includes a bottom plate 21 located at the bottom, and the bottom plate 21 is provided with a discharge port 211. The channel 1 141 is connected to the channel 2 52 through the conduit 15, the channel 2 52 is connected to the sieve holes 91, and the discharge port 211 is connected to the sieve holes 91, and together they form a material passage. Figure 2 As shown, a storage space is formed between the sieve plate 9 and the pressing plate 4. The material to be screened enters the storage space. The vibrator is connected to the seat body 2, and the seat body 2 vibrates so that the solid particles in the storage space that are smaller than the aperture of the sieve hole 91 gradually pass through the sieve hole 91. At the same time, when the pressing plate 4 rotates, the sliding sleeve 5 is driven, so that the scraper 53 rotates along the axis of the pressing plate 4, and the scraper 53 forms a stirring on the upper end surface of the sieve plate 9 to speed up the screening process. Figure 7 The scraper bar 53 includes an extension portion 531 at the bottom, the outer diameter of the extension portion 531 is smaller than the sieve hole 91, the bottom surface of the extension portion 531 is a spherical surface, and multiple extension portions 531 are distributed along the length direction of the scraper bar 53. The extension portion 531 can extend into or out of the sieve hole 91 as the scraper bar 53 rotates, so that some solid particles stuck in the sieve hole 91 fall downward out of the sieve hole 91 through the squeezing of the extension portion 531.

[0034] The upper end of the pressing plate 4 is connected to the output end of the oil cylinder 7. The pressing plate 4 is located above the sieve plate 9. The pressing plate 4 can move up and down. When the pressing plate 4 moves downward, it can get close to the sieve plate 9 and squeeze the solid particles between the sieve plate 9 and the pressing plate 4. The sifter also includes a guide plate 8, which is located below the sieve plate 9. The upper end of the guide plate 8 is provided with a protrusion 81, and the protrusion 81 is arranged in a one-to-one correspondence with the sieve hole 91. The guide plate 8 is driven by the cylinder 22 to move up and down. When the guide plate 8 is located at the upper extreme position, the protrusion 81 is inserted into the sieve hole 91. The outer diameter of the protrusion 81 is the same as the inner diameter of the sieve hole 91, and the upper end surface of the protrusion 81 is flush with the upper end surface of the sieve plate 9. When the protrusion 81 is inserted into the sieve hole 91, the pressing plate 4 moves downward, and the pressing plate 4 and the sieve plate 9 squeeze the solid particles up and down, and the solid particles are crushed as the pressing plate 4 rotates, so that the solid particles that cannot pass through the sieve hole 91 are crushed into smaller particles to pass through the sieve hole 91 to complete the screening. The guide plate 8 is provided with a plurality of guide holes 82 , and the guide holes 82 penetrate the guide plate 8 up and down so that the sieve holes 91 can be connected with the discharge port 211 .

[0035] The grooves 41 can be provided to bring the pressing plate 4 and the sieve plate 9 closer together, thereby increasing the squeezing effect of the pressing plate 4 and the sieve plate 9 on the solid particles.

[0036] A screening method, comprising the above-mentioned screening device, comprises the following specific steps:

[0037] S1: Screening

[0038] ① The pressing plate 4 moves to the upper limit position, and the guide plate 8 moves to the lower limit position. The solid particles to be screened are injected into the channel 141 of the material tray 14, and the solid particles enter the screening space between the pressing plate 4 and the screen plate 9 along the conduit 15 and the channel 2 52. The solid particles smaller than the aperture of the screen hole 91 are screened through the screen hole 91 and discharged downward along the guide hole 82 and the discharge port 211.

[0039] S2: Crushing

[0040] ② The guide plate 8 is driven upward by the cylinder 22, and the protrusion 81 of the guide plate 8 is inserted into the sieve hole 91, and the sieve hole 91 is closed. The pressing plate 4 moves downward close to the sieve plate 9 under the action of the cylinder 7. As the pressing plate 4 rotates under the action of the motor 3, the pressing plate 4 and the sieve plate 9 crush the solid particles between the two and crush them into small particles, and then repeat step S1 to discharge the material.

[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sieving device, characterized in that: The invention comprises a cover body (1) and a base body (2), wherein a sieve plate (9) is fixedly mounted on the base body (2), wherein the sieve plate (9) is inserted into the base body (2), wherein the sieve plate (9) is provided with a plurality of sieve holes (91), wherein a pressing plate (4) is mounted on the cover body (1), wherein the pressing plate (4) is located above the sieve plate (9), wherein the pressing plate (4) is capable of moving up and down, wherein the pressing plate (4) is capable of being close to the sieve plate (9), wherein the pressing plate (4) is connected with a sliding sleeve (5), wherein the sliding sleeve (5) is provided with a second channel (52), wherein the cover body (1) is also provided with a material tray (14), wherein the material tray (14) is provided with a plurality of sieve holes (91 ... The disk (14) is provided with a channel 1 (141), the bottom of the material disk (14) is connected with a conduit (15), the cover body (1) comprises a disk body (11), the disk body (11) is provided with a feed port (111), the feed port (111) is aligned with the channel 1 (141), the channel 1 (141) is connected with the channel 2 (52) through the conduit (15), the channel 2 (52) is connected with the sieve hole (91), the bottom of the base body (2) is provided with a discharge port (211), the discharge port (211) is connected with the sieve hole (91); It also comprises a guide plate (8), the guide plate (8) being located below the sieve plate (9), a protrusion (81) being provided at the upper end of the guide plate (8), the protrusion (81) being arranged in one-to-one correspondence with the sieve holes (91), the guide plate (8) being able to move up and down, and when the guide plate (8) is located at the upper extreme position, the protrusion (81) is inserted into the sieve hole (91), and the upper end surface of the protrusion (81) is flush with the upper end surface of the sieve plate (9); The inner wall of the seat body (2) is connected to a guide sleeve (12) via a bearing (121); the guide sleeve (12) is capable of rotating along its own axis; the guide sleeve (12) is fixedly connected to the cover body (1); the guide sleeve (12) is installed with a support frame (13); and the support frame (13) is installed with the material tray (14); The outer wall of the sliding sleeve (5) is slidably connected to the inner wall of the pressure plate (4); a sleeve seat (6) is installed on the upper end of the pressure plate (4); the sliding sleeve (5) is sleeved with a spring (61); the spring (61) is located in the sleeve seat (6); the upper end of the spring (61) abuts against the upper wall of the sleeve seat (6); the lower end of the spring (61) abuts against a ring body (54); the ring body (54) is fixed to the sliding sleeve (5); the bottom of the sliding sleeve (5) is connected to a scraper strip (53); the scraper strip (53) abuts against the upper end of the sieve plate (9).

2. A sifter according to claim 1, characterized in that: The outer diameter of the protrusion (81) is the same as the inner diameter of the sieve hole (91).

3. A sifter according to claim 1, characterized in that: The guide plate (8) is provided with a plurality of guide holes (82), and the guide holes (82) penetrate the guide plate (8) from top to bottom so that the sieve holes (91) can be connected to the discharge port (211).

4. A sifter according to claim 1, characterized in that: The scraper strip (53) comprises an extension portion (531) located at the bottom, and the extension portion (531) can extend into the sieve hole (91).

5. A sifter according to claim 1, characterized in that: The bottom of the pressure plate (4) is provided with a groove (41), and the scraper strip (53) can be inserted into the groove (41).

6. A screening method, using the screening device according to any one of claims 1 to 5, characterized in that: The steps include: S1: Screening ① The pressing plate (4) moves to the upper limit position, and the guide plate (8) moves to the lower limit position. Solid particles to be screened are injected into the channel 1 (141) of the material tray (14). The solid particles enter the screening space between the pressing plate (4) and the screen plate (9) along the guide tube (15) and the channel 2 (52). Solid particles smaller than the aperture of the screen hole (91) are screened through the screen hole (91) and discharged downward along the guide hole (82) and the discharge port (211); S2: Crushing ② The guide plate (8) moves upward, the protrusion (81) of the guide plate (8) is inserted into the sieve hole (91), the sieve hole (91) is closed, and the pressing plate (4) moves downward close to the sieve plate (9). As the pressing plate (4) rotates, the pressing plate (4) and the sieve plate (9) crush the solid particles between them and crush them into small particles, and then repeat step S1 to discharge the material.

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