A grinding device for calcium hydrogen phosphate with screening function

Abstract

The present invention discloses a grinding device for calcium hydrogen phosphate with a screening function, and relates to the technical field of grinding devices for calcium hydrogen phosphate. It comprises a drum, a discharge port, a bracket, a feed pipe and an anti-blocking screen. The present invention utilizes a curved screen rod to form a dish-shaped material-bearing structure to support the mixture, so that qualified phosphate rock fragments and slurry fall from the gap in the inner concave part, and unqualified phosphate rock fragments slide down the slope and crush, thereby achieving the effect of screening. The centrifugal force generated by the rotation of the material screening screen is utilized to make the unqualified fragments slide into the gap between the convex ring and the crushing ring. Through the cam design of the convex ring and the inner wall of the crushing ring, the unqualified fragments are secondary crushed, ensuring that the particle size of the supplied fragments is uniform and improving the subsequent grinding efficiency. The conversion rod is utilized to drive the rotating sleeve to rotate in the opposite direction, so that the shaft assembly can drive the material screening screen and the convex ring to rotate in the opposite direction under a single drive, ensuring that the vibrator in the convex ring can be in cyclic contact with the vibrator ring of the material screening screen.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment for calcium hydrogen phosphate, in particular to grinding equipment for calcium hydrogen phosphate with a screening function. Background Art

[0002] As an important inorganic compound, dicalcium phosphate is widely used in food additives, pharmaceutical excipients, feed nutrient supplements, and toothpaste abrasives. In its production, ball mills are commonly used to wet-grind phosphate rock containing magnesium salts. Prior to grinding, the ore must be initially crushed. The crushed phosphate rock is then mixed with a slurry and fed into the ball mill for grinding.

[0003] However, existing wet grinders still present numerous technical challenges when grinding phosphate rock. Crushing the phosphate rock in a crusher can lead to variations in the size of the crushed material. If the grinding time is too short, the material will not be ground properly, resulting in substandard finished product quality. Increasing the grinding time in a ball mill not only increases production time and reduces efficiency, but can also lead to over-grinding of some of the crushed material. Furthermore, existing ball mills are prone to problems such as overflow, backflow, and clogging during the production process. Summary of the Invention

[0004] The object of the present invention is to provide a grinding device for calcium hydrogen phosphate with a screening function to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a grinding device for calcium hydrogen phosphate with a screening function, comprising a bracket and a drive motor, a drum rotatably mounted on the bracket, a discharge port provided at one end of the drum, grinding steel balls provided in the drum, a feed pipe provided at the other end of the drum, an anti-blocking screen connected to the feed pipe, a transmission gear provided on the side of the drum close to the feed pipe, a drive gear mounted on the output shaft of the drive motor, and the drive gear meshing with the transmission gear for transmission.

[0006] The transmission gear is sleeved on the roller, and the drive motor is located near the transmission gear.

[0007] The grinding equipment is connected to a control cabinet, which is used to control the entire grinding equipment.

[0008] The mixed material enters the drum from the feed pipe, and the control system starts the drive motor. The output shaft of the drive motor drives the drive gear to rotate, and the drive gear drives the transmission gear meshing with it to rotate. The transmission gear drives the drum to rotate, causing the grinding steel balls in the drum to perform parabolic motion. The grinding steel balls at the bottom grind the phosphate rock fragments, and the grinding steel balls thrown out crush the fragments. The ground fragments are mixed with slurry and discharged from the discharge port on one side, thus completing the grinding of the phosphate rock.

[0009] Furthermore, the anti-blocking screen includes a screen shell, a feed motor is installed on the top of the screen shell, the output shaft of the feed motor passes through the screen shell and is installed with a rotating shaft assembly, a distributor is installed on the rotating shaft assembly, a crushing ring is installed in the screen shell, an anti-overflow assembly is installed at the bottom of the crushing ring, a feeding port is provided at the top of the screen shell, and a fixed frame is connected to the outside of the screen shell.

[0010] The fixing frame is used to maintain the stability of the screening shell.

[0011] The sealing sleeve on the gear rod drives the sieve to rotate via the sliding sleeve. The connecting sleeve on the gear cylinder drives the convex ring to rotate in the opposite direction via the connecting rod. The mixed material falls from the feed port into the central recess of the sieve. The slurry and phosphate rock fragments that meet the crushing diameter fall through the gaps in the curved screen rods and are fed into the feed pipe by the feed screw. Phosphate rock fragments that do not meet the crushing diameter remain in the recess of the sieve. As the sieve rotates, centrifugal force forces the larger fragments from the recess toward the outer edge of the sieve, ultimately sliding along the outer slope into the gap between the convex ring and the crushing ring. The convex ring and crushing ring work together to perform a secondary crushing of the unqualified fragments, ensuring a uniform particle size and improving subsequent grinding efficiency. The crushed fragments fall through the gap between the convex ring and the crushing ring and are fed into the feed pipe by the feed screw.

[0012] Furthermore, the material distributor includes a convex ring, a number of vibrators are installed in the convex ring, a material distribution screen is slidably installed on the convex ring, a connecting rod is installed on the convex ring, one end of the connecting rod is connected to the rotating shaft assembly, the material distribution screen is slidably connected to the rotating shaft assembly, the convex ring adopts a cam structure, and a slope is provided on the convex ring.

[0013] When the convex ring rotates, due to its cam structure design, the convex ring rotates eccentrically around the rotating shaft assembly, and the inclined surface of the convex ring and the side surface of the crushing ring crush the unqualified large-size crushed materials, causing the unqualified crushed materials to be crushed again.

[0014] Furthermore, an annular groove is provided on the convex ring, the vibrator is installed in the annular groove, and the material dividing screen is slidably connected to the annular groove; the vibrator includes a support, and a vibrator wheel is rotatably installed on the support.

[0015] Since the sieve rotates in opposite directions to the convex ring, when the vibrator in the annular groove is located in the groove of the wave groove, the sieve is in a sinking state under the action of its own gravity and the impact of the mixed material. When the vibrator wheel rotates along the bottom end of the vibrator ring to the convex part of the wave groove, the vibrator wheel lifts up the entire sieve, and so on, so that the sieve rotates and slides up and down, and the sieve produces a vibrating effect. Under the action of the vibrating effect, the mixed material is accelerated to pass through the gap between the curved screen bars. During the screening process, the material discharge speed is guaranteed, and the phosphate rock fragments are prevented from being blocked between the curved screen bars.

[0016] Furthermore, the material dividing screen includes a vibrating ring, a wave groove is provided at the bottom end of the vibrating ring, the vibrating ring is slidably installed in the annular groove, a number of curved screen rods are installed on the vibrating ring, a sliding sleeve is installed at one end of the curved screen rod, the sliding sleeve is slidably connected to the rotating shaft assembly, and the several curved screen rods form a dish-shaped structure, the center of the dish-shaped structure is concave, and the outer edge of the dish-shaped structure is an oblique slope.

[0017] Furthermore, the rotating shaft assembly includes a driving rod and a conversion rod. The top end of the driving rod is connected to the output shaft of the feed motor, the bottom end of the conversion rod passes through the feed pipe and is connected to the fixed frame, the conversion rod is engaged with the driving rod for transmission, and a rotating sleeve is rotatably installed on the conversion rod. The rotating sleeve is engaged with the conversion rod for transmission, the rotating sleeve is connected to the connecting rod, and the driving rod is slidably connected to the sliding sleeve.

[0018] Phosphate ore containing magnesium salts is crushed into small pieces and then added to a slurry to form a mixture. This mixture is then fed into the feed port at the top of the sub-screen housing via an external feeder. The control system activates the feed motor, and the motor's output shaft rotates the drive rod. The upper teeth at the bottom of the rack drive the reversing gear on the rotating rod. The reversing gear, through its lower teeth, drives the gear cylinder on the fixed rod. Driven by the reversing gear, the gear cylinder rotates in the opposite direction of the rack.

[0019] Furthermore, the rotating sleeve includes a gear cylinder, which is rotatably installed on the conversion rod. The top of the gear cylinder is provided with lower end teeth, which engage with the conversion rod for transmission. A feeding spiral is provided on the gear cylinder, and a connecting sleeve is provided at the top of the gear cylinder. The connecting sleeve is rotatably connected to the drive rod, and the connecting sleeve is connected to the connecting rod.

[0020] When the rotating sleeve rotates, the feeding screw is driven to rotate synchronously, and the feeding screw feeds the mixed material to the feeding pipe.

[0021] Furthermore, the conversion rod includes a fixed rod, which passes through the feed pipe and is connected to the fixed frame. A rotating rod is provided at the top of the fixed rod, and a reversing gear is rotatably installed on the rotating rod. The reversing gear is engaged with the lower end teeth for transmission, and the fixed rod is rotatably connected to the rotating sleeve.

[0022] Furthermore, the driving rod includes a gear rod, the top end of which is connected to the output shaft of the feed motor, a sealing sleeve is provided on the gear rod, the sliding sleeve is slidably connected to the sealing sleeve, the bottom end of the gear rod is provided with upper end teeth, the upper end teeth are engaged with the reversing gear for transmission, and the gear rod is rotatably connected to the connecting sleeve.

[0023] The sliding sleeve can only move up and down in the sealing sleeve. When the sealing sleeve rotates with the driving rod, it will drive the sliding sleeve to rotate together.

[0024] Furthermore, the anti-overflow component includes an elastic sealing ring and a transmission bottom ring. The elastic sealing ring is installed at the bottom end of the crushing ring. A sliding ring is installed on the transmission bottom ring. The sliding ring is slidably installed at the bottom end of the crushing ring. A pusher head is installed on the sliding ring. A diaphragm is installed in the crushing ring, and piezoelectric ceramics are installed between the diaphragms.

[0025] The elastic sealing ring is made of lightweight elastic material.

[0026] When an abnormal situation of return material overflow occurs, the overflowed slurry overflows from the feed pipe and enters the sub-screen shell. The large volume design of the sub-screen shell can accommodate short-term overflow; when there is too much overflow and the slurry reaches the height of the anti-overflow component, the overflow generates buoyancy on the elastic sealing ring. Since the elastic sealing ring is made of lightweight elastic material, under the action of buoyancy, the elastic sealing ring begins to deform upward and drives the transmission bottom ring to lift upward. The transmission bottom ring drives the sliding ring to slide upward in the crushing ring, and the sliding ring drives the push head upward to hit the piezoelectric ceramic in the diaphragm, causing the piezoelectric ceramic to be pressurized and generate an electrical signal. After receiving the electrical signal, the control system increases the speed of the feed motor, and the feed motor accelerates the rotation of the shaft assembly, so that the gear cylinder drives the discharge screw to rotate faster, thereby increasing the discharge speed and allowing the overflowed slurry to quickly return. When the electrical signal disappears, the control system gradually restores the speed of the feed motor. When the electrical signal is further strengthened, the control system automatically shuts down the feeding device, suspends feeding, and issues an alarm to the staff.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. When an abnormal situation of material overflow occurs, the large volume design of the sub-screen shell can accommodate short-term overflow and improve overflow tolerance; when the overflow reaches the height of the anti-overflow component, the buoyancy generated by the overflow on the elastic sealing ring is converted into deformation of the elastic sealing ring, and then the deformation is converted into displacement of the transmission bottom ring and the sliding ring, which eventually drives the push head to hit the piezoelectric ceramic to generate an electrical signal, thereby realizing the detection of excessive overflow; the control system accelerates the speed of the shaft assembly, making the feeding screw rotate faster, increasing the feeding speed, and allowing the overflowed slurry to quickly return, achieving the purpose of reflux control based on overflow detection.

[0029] 2. When the vibrator wheel rotates to the raised part of the wave groove, the vibrator wheel on the vibrator is used to lift the entire material screen. When the vibrator wheel rotates to the groove part of the wave groove, the material screen automatically sinks under its own gravity and the impact of the mixture. This reciprocating process makes the material screen vibrate. Through the vibration effect, the mixture is accelerated to pass through the gap between the curved screen bars. During the screening process, the material discharge speed is guaranteed, and at the same time, the phosphate rock fragments are prevented from being blocked between the curved screen bars, thereby achieving the purpose of anti-blocking.

[0030] 3. Utilizing curved screen bars to form a dish-shaped support structure, the mixed material is supported, allowing qualified phosphate rock fragments and slurry to fall through the gap in the inner concave area, while unqualified phosphate rock fragments slide down the slope and break, achieving a screening effect. The centrifugal force generated by the rotating sieve causes unqualified fragments to slide into the gap between the convex ring and the crushing ring. The cam design of the convex ring, in conjunction with the inner wall of the crushing ring, causes the unqualified fragments to undergo a secondary crushing, ensuring a uniform particle size of the supplied fragments and improving subsequent grinding efficiency.

[0031] 4. Use the conversion rod to drive the rotating sleeve to rotate in the opposite direction, so that the rotating shaft assembly can drive the material screen and the convex ring to rotate in the opposite direction under a single drive, ensuring that the vibrator in the convex ring can cyclically contact with the vibrator ring of the material screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an overall three-dimensional diagram of the grinding equipment of the present invention;

[0033] Figure 2 A perspective view of the anti-blocking screen of the present invention;

[0034] Figure 3 For the present invention Figure 2 A partial enlarged view of area A in the middle;

[0035] Figure 4 It is a three-dimensional diagram of the distributor of the present invention;

[0036] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle B area;

[0037] Figure 6 is a three-dimensional diagram of the convex ring of the present invention;

[0038] Figure 7 A perspective view of the material dividing screen of the present invention;

[0039] Figure 8 is a three-dimensional diagram of the shaft assembly of the present invention;

[0040] Figure 9 A perspective view of a rotating sleeve according to the present invention;

[0041] Figure 10 A perspective view of a conversion rod according to the present invention;

[0042] Figure 11 It is a three-dimensional diagram of the driving rod of the present invention.

[0043] In the figure: 1. drum; 2. discharge port; 3. bracket; 4. feed pipe; 5. anti-blocking screen; 6. transmission gear; 51. screen housing; 52. shaft assembly; 53. distributor; 54. anti-overflow assembly; 55. crushing ring; 56. feed motor; 531. distributor; 532. convex ring; 533. connecting rod; 534. vibrator; 5341. support; 5342. vibrator wheel; 5311. sliding sleeve; 5312. curved screen rod; 5313. vibrator ring; 5314. wave trough; 52 1. Driving rod; 522. Conversion rod; 523. Rotating sleeve; 5231. Gear cylinder; 5232. Feeding screw; 5233. Lower end teeth; 5234. Connecting sleeve; 5221. Fixed rod; 5222. Rotating rod; 5223. Reversing gear; 5211. Gear rod; 5212. Sealing sleeve; 5213. Upper end teeth; 541. Elastic sealing ring; 542. Transmission bottom ring; 543. Sliding ring; 544. Pushing head; 545. Diaphragm; 546. Piezoelectric ceramic; 5321. Annular groove. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] like Figures 1-11 As shown, the present invention provides a technical solution for grinding calcium hydrogen phosphate with a screening function. The grinding equipment includes a bracket 3 and a drive motor. A drum 1 is rotatably mounted on the bracket 3. A discharge port 2 is provided at one end of the drum 1. Grinding steel balls are installed in the drum 1. A feed pipe 4 is mounted at the other end of the drum 1. The feed pipe 4 is connected to an anti-blocking screener. A transmission gear 6 is provided on the side of the drum 1 near the feed pipe 4. A drive gear is mounted on the output shaft of the drive motor and meshes with the transmission gear 6 for transmission. The grinding equipment is connected to a control cabinet for controlling the entire grinding equipment.

[0046] The transmission gear 6 is sleeved on the drum, and the drive motor is located near the transmission gear 6 .

[0047] The anti-blocking screen 5 includes a screen housing 51, with a feed motor 56 mounted on the top of the screen housing 51. The output shaft of the feed motor 56 passes through the screen housing 51 and is mounted on a shaft assembly 52. ​​A distributor 53 is mounted on the shaft assembly 52. ​​A crushing ring 55 is mounted within the screen housing 51, and an overflow prevention assembly 54 is mounted at the bottom of the crushing ring 55. A feed port is provided at the top of the screen housing 51, and a fixed bracket is connected to the outside of the screen housing 51. The fixed bracket is used to maintain the stability of the screen housing 51.

[0048] The material distributor 53 includes a convex ring 532, in which a number of vibrators 534 are installed. A material distributor 531 is slidably installed on the convex ring 532. A connecting rod 533 is installed on the convex ring 532. One end of the connecting rod 533 is connected to the rotating shaft assembly 52. ​​The material distributor 531 is slidably connected to the rotating shaft assembly 52. ​​The convex ring 532 adopts a cam structure and is provided with an inclined surface.

[0049] When the convex ring 532 rotates, due to its cam structure design, the convex ring 532 rotates eccentrically around the rotating shaft assembly 52, and the inclined surface of the convex ring 532 and the side of the crushing ring 55 crush the unqualified large-particle crushed materials, causing the unqualified crushed materials to be crushed again.

[0050] An annular groove 5321 is provided on the convex ring 532 , and the vibrator 534 is installed in the annular groove 5321 . The material separation screen 531 is slidably connected to the annular groove 5321 . The vibrator 534 includes a support 5341 , and a vibrator wheel 5342 is rotatably mounted on the support 5341 .

[0051] The material dividing screen 531 includes a vibration ring 5313, a wave groove 5314 is provided at the bottom end of the vibration ring 5313, the vibration ring 5313 is slidably installed in the annular groove 5321, and a plurality of curved screen rods 5312 are installed on the vibration ring 5313. A sliding sleeve 5311 is installed at one end of the curved screen rod 5312. The sliding sleeve 5311 is slidably connected to the rotating shaft assembly 52. ​​The plurality of curved screen rods 5312 form a dish-shaped structure, the center of the dish-shaped structure is concave, and the outer edge of the dish-shaped structure is an oblique slope.

[0052] The rotating shaft assembly 52 includes a driving rod 521 and a conversion rod 522. The top end of the driving rod 521 is connected to the output shaft of the feeding motor 56. The bottom end of the conversion rod 522 passes through the feeding pipe 4 and is connected to the fixed frame. The conversion rod 522 is engaged with the driving rod 521 for transmission. A rotating sleeve 523 is rotatably installed on the conversion rod 522. The rotating sleeve 523 is engaged with the conversion rod 522 for transmission. The rotating sleeve 523 is connected to the connecting rod 533. The driving rod 521 is slidably connected to the sliding sleeve 5311.

[0053] The rotating sleeve 523 includes a gear cylinder 5231, which is rotatably mounted on the conversion rod 522. A lower end tooth 5233 is provided at the top of the gear cylinder 5231, and the lower end tooth 5233 is engaged with the conversion rod 522 for transmission. A feeding screw 5232 is provided on the gear cylinder 5231, and a connecting sleeve 5234 is provided at the top of the gear cylinder 5231. The connecting sleeve 5234 is rotatably connected to the driving rod 521, and the connecting sleeve 5234 is connected to the connecting rod 533.

[0054] When the rotating sleeve 523 rotates, the unloading screw 5232 is driven to rotate synchronously, and the unloading screw 5232 rotates and feeds the mixed material to the feeding pipe 4.

[0055] The conversion rod 522 includes a fixed rod 5221, which passes through the feed pipe 4 and is connected to the fixed frame. A rotating rod 5222 is provided at the top of the fixed rod 5221. A reversing gear 5223 is rotatably installed on the reversing rod 5222. The reversing gear 5223 is engaged with the lower end teeth 5233 for transmission, and the fixed rod 5221 is rotatably connected to the rotating sleeve 523.

[0056] The driving rod 521 includes a gear rod 5211, the top end of the gear rod 5211 is connected to the output shaft of the feed motor 56, a sealing sleeve 5212 is provided on the gear rod 5211, the sliding sleeve 5311 is slidingly connected to the sealing sleeve 5212, the bottom end of the gear rod 5211 is provided with an upper end tooth 5213, the upper end tooth 5213 is engaged with the reversing gear 5223 for transmission, and the gear rod 5211 is rotatably connected to the connecting sleeve 5234.

[0057] The sliding sleeve 5311 can only move up and down in the sealing sleeve 5212. When the sealing sleeve 5212 rotates along with the driving rod 521, it will drive the sliding sleeve 5311 to rotate together.

[0058] Overflow prevention assembly 54 includes an elastic sealing ring 541 and a transmission bottom ring 542. Elastic sealing ring 541 is mounted on the bottom end of crushing ring 55. Sliding ring 543 is mounted on transmission bottom ring 542. Sliding ring 543 is slidably mounted on the bottom end of crushing ring 55. Sliding ring 543 is mounted on pusher head 544. A diaphragm 545 is mounted within crushing ring 55, and piezoelectric ceramics 546 are installed between diaphragms 545. Elastic sealing ring 541 is made of a lightweight elastic material.

[0059] The working principle of the present invention is as follows: Operators crush phosphate rock containing magnesium salts into crushed material and then add slurry to form a mixture. The mixture is then fed into the feed port at the top of the sub-screen housing 51 via an external feeding device. The control system activates the feed motor 56, and the output shaft of the feed motor 56 drives the drive rod 521 to rotate. The upper end teeth 5213 at the bottom end of the gear rod 5211 drive the reversing gear 5223 to rotate on the rotating rod 5222. The reversing gear 5223 drives the gear cylinder 5231 to rotate on the fixed rod 5221 via the lower end teeth 5233. Under the transmission action of the reversing gear 5223, the gear cylinder 5231 rotates in the opposite direction relative to the gear rod 5211.

[0060] The sealing sleeve 5212 on the gear rod 5211 drives the sieving screen 531 to rotate via the sliding sleeve 5311. The connecting sleeve 5234 on the gear cylinder 5231 drives the convex ring 532 to rotate in the opposite direction via the connecting rod 533. The mixed material falls from the feed port into the central concave portion of the sieving screen 531. The slurry and phosphate rock crushed materials that meet the crushing diameter fall through the gaps between the curved sieve rods 5312 and are fed into the feed pipe 4 by the feed screw 5232. The phosphate rock crushed materials that do not meet the crushing diameter remain in the concave portion of the sieving screen 531. Due to the rotating sieving screen 531, the centrifugal force causes the larger particles to move from the concave portion toward the outer edge of the sieving screen 531, finally sliding along the outer edge slope into the gap between the convex ring 532 and the crushing ring 55. The convex ring 532 and the crushing ring 55 cooperate to perform secondary crushing on the unqualified crushed materials, ensuring a uniform particle size of the supplied crushed materials and improving subsequent grinding efficiency. The crushed materials fall from the gap between the convex ring 532 and the crushing ring 55 and are fed into the feed pipe 4 by the feeding screw 5232.

[0061] Since the dividing screen 531 and the convex ring 532 rotate in opposite directions, when the vibrator 534 in the annular groove 5321 is located in the groove of the wave groove 5314, the dividing screen 531 is in a sinking state under its own gravity and the impact of the mixed material. When the vibrator wheel 5342 rotates along the bottom end of the vibrator ring 5313 to the convex part of the wave groove 5314, the vibrator wheel 5342 lifts the entire dividing screen 531, and so on. The dividing screen 531 rotates and slides up and down reciprocatingly, and the dividing screen 531 produces a vibrating effect. Under the action of the vibrating effect, the mixed material is accelerated to pass through the gap of the curved screen rod 5312. During the screening process, the material discharge speed is guaranteed, and the phosphate rock fragments are prevented from being blocked between the curved screen rods 5312.

[0062] When the abnormal situation of overflow of return material occurs, the overflowed slurry overflows from the feed pipe 4 and enters the sub-screening shell 51. The large volume design of the sub-screening shell 51 can accommodate short-term overflow. When the overflow is too much and the slurry reaches the height of the overflow prevention component 54, the overflow generates buoyancy on the elastic sealing ring 541. Since the elastic sealing ring 541 is made of light elastic material, under the action of buoyancy, the elastic sealing ring 541 begins to deform upward and drives the transmission bottom ring 542 to lift upward. The transmission bottom ring 542 drives the sliding ring 543 to slide upward in the crushing ring 55, and the sliding ring 543 drives the push ring 543 to slide upward in the crushing ring 55. The head 544 hits the piezoelectric ceramic 546 in the diaphragm 545 upward, causing the piezoelectric ceramic 546 to be pressurized and generate an electrical signal. After receiving the electrical signal, the control system increases the speed of the feed motor 56. The feed motor 56 accelerates the rotation of the shaft assembly 52, causing the gear cylinder 5231 to drive the discharge screw 5232 to rotate faster, thereby increasing the discharge speed and allowing the overflowed slurry to quickly flow back. When the electrical signal disappears, the control system gradually restores the speed of the feed motor 56. When the electrical signal is further strengthened, the control system automatically turns off the feeding device, suspends feeding, and issues an alarm to the staff.

[0063] The mixed material enters the drum 1 through the feed pipe 4, and the control system starts the drive motor. The output shaft of the drive motor drives the drive gear to rotate, and the drive gear drives the transmission gear 6 engaged with it to rotate. The transmission gear 6 drives the drum 1 to rotate, causing the grinding steel balls in the drum 1 to perform parabolic motion. The grinding steel balls at the bottom grind the phosphate rock fragments, and the grinding steel balls thrown out crush the fragments. The ground fragments are mixed with slurry and discharged from the discharge port 2 on one side, thereby completing the grinding of the phosphate rock.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A grinding device for calcium hydrogen phosphate with a screening function, characterized in that: The grinding equipment includes a bracket and a drive motor. A drum is rotatably mounted on the bracket. A discharge port is provided at one end of the drum. Grinding steel balls are provided in the drum. A feed pipe is installed at the other end of the drum. An anti-blocking screen is connected to the feed pipe. A transmission gear is provided on the side of the drum close to the feed pipe. A drive gear is installed on the output shaft of the drive motor. The drive gear meshes with the transmission gear for transmission. The anti-blocking screen includes a screen housing, a feed motor is installed on the top of the screen housing, the output shaft of the feed motor passes through the screen housing and is installed with a rotating shaft assembly, a distributor is installed on the rotating shaft assembly, and a crushing ring is installed in the screen housing; The material distributor includes a convex ring, a material distributor screen is slidably mounted on the convex ring, a connecting rod is mounted on the convex ring, a plurality of vibrators are mounted inside the convex ring, the convex ring adopts a cam structure, and an inclined surface is provided on the convex ring; The convex ring is provided with an annular groove, and the vibrator is installed in the annular groove; the vibrator includes a support, and a vibrator wheel is rotatably installed on the support; The bottom end of the vibration ring is provided with a wave groove, and the vibration ring is slidably installed in the annular groove; The material dividing screen includes a vibrating ring, on which a plurality of curved screen bars are mounted, and a sliding sleeve is mounted at one end of the curved screen bar; The rotating shaft assembly includes a driving rod and a conversion rod, a rotating sleeve is rotatably mounted on the conversion rod, and the driving rod is slidably connected to the sliding sleeve; The rotating sleeve includes a gear cylinder, the top of which is provided with lower end teeth, a feeding spiral is provided on the gear cylinder, and a connecting sleeve is provided on the top of the gear cylinder, which is connected to the connecting rod; The conversion rod includes a fixed rod, which passes through the feed pipe and is connected to the fixed frame. A rotating rod is provided at the top of the fixed rod. A reversing gear is rotatably installed on the rotating rod. The reversing gear meshes with the lower end teeth for transmission. The fixed rod is rotatably connected to the gear cylinder. The driving rod includes a gear rod, the top end of which is connected to the output shaft of the feed motor, a sealing sleeve is provided on the gear rod, the sliding sleeve is slidably connected to the sealing sleeve, the bottom end of the gear rod is provided with an upper end tooth, the upper end tooth is meshed with the reversing gear for transmission, and the gear rod is rotatably connected to the connecting sleeve; The sliding sleeve can only move up and down in the sealing sleeve. When the sealing sleeve rotates with the driving rod, it will drive the sliding sleeve to rotate together.

2. The grinding device for calcium hydrogen phosphate with a screening function according to claim 1, characterized in that: An anti-overflow component is installed at the bottom of the crushing ring, a feeding port is provided at the top of the sub-screening shell, and a fixing frame is connected to the outside of the sub-screening shell.

3. The grinding device for calcium hydrogen phosphate with a screening function according to claim 1, characterized in that: A plurality of curved screen bars form a dish-shaped structure, the center of the dish-shaped structure is concave, and the outer edge of the dish-shaped structure is in the shape of an oblique slope.

4. The grinding device for calcium hydrogen phosphate with a screening function according to claim 2, characterized in that: The anti-overflow component includes an elastic sealing ring and a transmission bottom ring. The elastic sealing ring is installed at the bottom end of the crushing ring. A sliding ring is installed on the transmission bottom ring. The sliding ring is slidably installed at the bottom end of the crushing ring. A pusher head is installed on the sliding ring. A diaphragm is installed in the crushing ring, and piezoelectric ceramics are installed between the diaphragms.

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