Crude lactide crushing device

Abstract

The utility model provides a coarse lactide crushing device which comprises a box body, a spline shaft is arranged on the box body, one end of the spline shaft is directly connected with a power piece capable of driving the spline shaft to rotate, the other end of the spline shaft is sleeved with a hammer handle used for crushing coarse lactide in a sliding mode, the hammer handle is connected with a hammer head, and a crushing plate used for bearing materials is arranged below the hammer head. The hammer handle is fixedly sleeved with a cylindrical cam capable of driving the hammer handle to slide, a sliding groove is formed in the cylindrical cam, a sliding rod is fixed to the box body, and the sliding rod is in sliding connection with the sliding groove. The device is convenient to operate and simple in structure, materials can be hammered and ground, meanwhile, the materials can be screened in time, and the crushing degree and the crushing efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of propylene lactone, specifically relates to a crude propylene lactone crushing device. BACKGROUND

[0002] Propylene lactone (Lactide) as the cyclic dimer of lactic acid is an important intermediate for the synthesis of polylactic acid (PLA), and propylene lactone usually exists in the form of large crystals or blocks, which has poor flowability when directly used, and is not conducive to metering, conveying and mixing. After crushing, fine particles are formed, the particle size distribution is more uniform, and uniform feeding for polymerization reaction is suitable, so that uneven reaction caused by particle size difference is avoided; at the same time, the preparation of propylene lactone (such as lactic acid dehydration and cyclization) is often accompanied by impurities (such as unreacted lactic acid), and after crushing, impurities are more easily removed by purification steps such as recrystallization and washing, so that the purity is improved.

[0003] The patent with publication number CN 208944227 U discloses a crusher for chemical industry, which comprises a base, a crushing tooth is slidably connected to the surface of a first rotating shaft, a compression spring is fixedly connected to one side of the surface of the first rotating shaft, a spring steel plate is fixedly connected to the bottom of an outer frame, sliding blocks are rotatably connected to both ends of the spring steel plate, a moving plate is fixedly connected to one end of a moving rod inside a damping frame, a first spring is fixedly connected between the bottom of the moving plate and the bottom of the inner wall of the damping frame, a top frame is sleeved on the top end of the moving rod, a movable plate is fixedly connected to one end of the moving rod inside the top frame, and a second spring is fixedly connected between the top of the movable plate and the top of the inner wall of the top frame.

[0004] However, the device still has the following problems:

[0005] 1. When crushing the material, only the crushing tooth is relied on to rotate and crush, which can easily cause some materials to accumulate at the bottom or corner, and the crushing degree of the material cannot be guaranteed.

[0006] 2. After crushing, the qualified materials cannot be screened and collected, and the materials that do not meet the crushing requirements cannot be crushed again. INVENTION CONTENTS

[0007] In order to solve the problems existing in the prior art, a crude propylene lactone crushing device is provided to solve the problems in the technical background.

[0008] The technical scheme adopted by the utility model to solve its technical problems is:

[0009] The utility model provides a kind of crude propylene lactone smashing device, including box, the box is provided with spline shaft, the one end of spline shaft is directly connected with the power element that can drive spline shaft rotation, the other end sliding sleeve is equipped with the hammer handle for crude propylene lactone smashing, the hammer handle is connected with hammer head, and the hammer head below is provided with the broken plate for receiving material;Fixed sleeve is equipped with the cylindrical cam that can drive the hammer handle sliding on the hammer handle, the cylindrical cam is opened with sliding slot, the sliding rod is fixed on the box, and the sliding rod is slidably connected with the sliding slot.

[0010] Preferably, the sliding groove includes a falling section, a grinding section and a lifting section, one end of the falling section is communicated with the grinding section and the lifting section, and the other end of the falling section is communicated with the other end of the lifting section.

[0011] Preferably, a pressing section is further arranged between the falling section and the grinding section.

[0012] Preferably, a screen is arranged on one side of the broken plate, a scraper is slidably arranged on the other side of the broken plate, a driving element for driving the scraper to slide is arranged on one side of the scraper, and the scraper can push the material onto the screen for screening.

[0013] Preferably, a rotating shaft is arranged on the broken plate, one end of the screen is fixed with the rotating shaft, the screen and the broken plate have an angle, and a coil spring for driving the screen to maintain the angle is coaxially fixed on the rotating shaft.

[0014] Preferably, an inclined receiving plate is arranged below the screen, a discharge port is arranged on the box, the receiving plate corresponds to the discharge port, and a blocking plate is slidably arranged in the discharge port.

[0015] Preferably, a baffle is fixed on the other end of the screen, and a vibrator is further fixed on the screen.

[0016] Preferably, a storage box is arranged on the top of the box, a discharging pipe is connected to the bottom of the storage box, a feeding disc is rotatably connected in the discharging pipe, and a feeding port is arranged on the feeding disc.

[0017] Preferably, a worm is fixedly sleeved on the spline shaft, a worm wheel is matched on one side of the worm, and the worm wheel is connected with the feeding disc.

[0018] Preferably, an access door is arranged on the box, and a transparent observation window is arranged on the access door.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. The utility model discloses a spline shaft and cylinder cam are provided with, when the power piece drives spline shaft rotation, spline shaft drives cylinder cam rotation, the relative sliding of the slide groove on cylinder cam and slide rod happens, and slide rod is fixed immovably, makes cylinder cam drive hammerhead to lift, can carry out the crushing work to the rough propylene glycol below hammerhead when descending, and hammerhead drops to the bottom, and spline shaft can continue to drive hammerhead to rotate, and make hammerhead grind material, further improve the crushing degree.

[0021] 2. The utility model discloses setting down the section, when the falling section of cylinder cam contacts with slide rod, hammerhead drops and crushes, along with cylinder cam continues to rotate, down the section contacts with slide rod, because slide rod is fixed immovably, down the section is the inclined slide groove, when down the section and slide rod relative slide, hammerhead continues to move a distance downward, so on the basis of the gravity of hammerhead, further exerted pressure to material, until slide rod and grinding section contact, grind material, at this moment, the double effect of gravity and pressure, further improve the crushing effect of material.

[0022] 3. The utility model discloses setting screen and scraper, when material crushes to certain degree, starts drive element, and drive element drives scraper to slide, and scraper slides and drives screen to be inclined downward, and scraper further pushes the material that completely crushes to screen and carries out screening, and the material that reaches the requirement will drop down and be collected, when scraper resets, screen is re-inclined upward to a certain angle, and the material of remaining larger particle will slide to hammerhead below again, and hammerhead lifts again and crushes the material that has not completely crushed, improve the utilization of material. DRAWINGS

[0023] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0024] Figure 1 It is the perspective view of the utility model;

[0025] Figure 2 It is the internal structure schematic view (working state one) of the utility model;

[0026] Figure 3 It is the internal structure schematic view (working state two) of the utility model;

[0027] Figure 4 It is the spring position schematic view of the utility model;

[0028] Figure 5 It is the development diagram of cylinder cam of the utility model.

[0029] DRAWINGS

[0030] 1. Housing; 2. Splined shaft; 3. Hammer; 4. Crushing plate; 5. Cylindrical cam; 6. Slide groove; 7. Slide rod; 8. Screen; 9. Scraper; 10. Gear; 11. Rack; 12. Collection box; 13. Discharge port; 14. Sealing plate; 15. Coil spring; 16. Vibrator; 17. Storage box; 18. Feeding tray; 19. Worm gear; 20. Worm wheel; 21. Electric actuator; 61. Falling section; 62. Grinding section; 63. Lifting section; 64. Pressing section. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] like Figures 1-5 As shown, this embodiment proposes a crude lactide crushing device, including a housing 1, a splined shaft 2 provided in the housing 1, one end of the splined shaft 2 is directly connected to a power component that can drive the splined shaft 2 to rotate, and the other end is slidably fitted with a hammer handle for crushing crude lactide, the hammer handle is connected to a hammer head 3, and a crushing plate 4 for receiving materials is provided below the hammer head 3; a cylindrical cam 5 that can drive the hammer handle to slide is fixedly fitted on the hammer handle, the cylindrical cam 5 has a sliding groove 6, and a sliding rod 7 is fixed on the housing 1, the sliding rod 7 is slidably connected to the sliding groove 6.

[0033] The power component is a motor, which is fixedly connected to housing 1, and the splined shaft 2 is directly connected to the motor.

[0034] When the motor drives the splined shaft 2 to rotate, the splined shaft 2 drives the hammer handle and cylindrical cam 5 to rotate. The sliding groove 6 on the cylindrical cam 5 slides relative to the sliding rod 7, and the sliding rod 7 remains stationary. At this time, the cylindrical cam 5 can drive the hammer head 3 to rise and fall. When the hammer head 3 falls, it can crush the crude lactide below. At the same time, when the hammer head 3 falls, the splined shaft 2 continues to drive the hammer head 3 to rotate, so that the hammer head 3 grinds the material and further improves the degree of crushing.

[0035] The chute 6 includes a falling section 61, a grinding section 62 and a lifting section 63. One end of the falling section 61 is connected to the lifting section 63 through the grinding section 62, and the other end of the falling section 61 is connected to the other end of the lifting section 63.

[0036] When the falling section 61 of the cylindrical cam 5 rotates to the position of the slide bar 7, the width of the falling section 61 is wide enough to meet the needs of the hammer handle and hammer head 3 when rotating and falling. That is, the hammer handle will not contact the slide bar 7 when rotating and falling, so that the hammer head 3 can fall freely and crush the crude lactide material below.

[0037] When the hammer head 3 falls to the bottom, the cylindrical cam 5 drives the hammer head 3 to continue rotating, at this time, the grinding section 62 slides relative to the slide rod 7, the grinding section 62 is in a horizontal state, when the grinding section 62 encounters hard materials, the hammer head 3 cannot move upward under the limiting action of the slide rod 7, and the hammer head 3 grinds the materials by relying on the gravity of the hammer head 3.

[0038] With the continuous rotation of the cylindrical cam 5, the lifting section 63 contacts the slide rod 7, the lifting section 63 is in an inclined state, at this time, the relative contact between the lifting section 63 and the slide rod 7 can drive the hammer head 3 to rise until the falling section 61 contacts the slide rod 7 again, and the hammer head 3 falls again to break.

[0039] The falling section 61 and the grinding section 62 are further provided with a pressing section 64.

[0040] The pressing section 64 is in an inclined state, when the pressing section 64 contacts the slide rod 7, after the hammer head 3 reaches the bottom, the pressing section 64 can drive the hammer head 3 to continue moving downward for a distance, on the basis of the gravity of the hammer head 3, the pressing section 64 can further apply pressure to the materials, and the slide rod 7 contacts the grinding section 62 to grind the materials, under the double action of the gravity of the hammer head 3 and the pressure, the crushing effect on the materials is further improved.

[0041] The crushing plate 4 is provided with a screen 8 on one side, and a scraper 9 slides on the other side of the crushing plate 4, the scraper 9 is provided with a driving member on one side to drive the scraper 9 to slide, and the scraper 9 can push the materials to the screen 8 for screening. The materials meeting the crushing requirements can be screened and collected.

[0042] The driving member is an electric push rod 21, and the electric push rod 21 is fixedly connected with the scraper 9 at the end.

[0043] The crushing plate 4 is rotationally provided with a rotating shaft, one end of the screen 8 is fixedly connected with the rotating shaft, the screen 8 and the crushing plate 4 have an angle, and the rotating shaft is coaxially fixedly connected with a coil spring 15 for driving the screen 8 to maintain the angle; the rotating shaft is further fixedly connected with a gear 10, one side of the gear 10 is matched with a rack 11, and the rack 11 is matched with the scraper 9.

[0044] The rack 11 is slidably connected with the box body 1.

[0045] The screen 8 and the crushing plate 4 have an angle, when some materials are splashed onto the screen 8 during the crushing of the materials, the materials can slide along the inclined screen 8 to the lower side of the hammer head 3, facilitating the continuous crushing, and the scraper 9 arranged on the other side of the hammer head 3 can also reduce the splashing of the materials to a far place.

[0046] The box is provided with a switch for controlling the on-off and current direction of the motor and electric push rod 21, which is a press spring switch generally composed of a press button, a spring, a fixed seat and a conductive contact. The press button is usually made of plastic or metal material and has certain pressing performance and mechanical strength. The spring functions to automatically reset the button and ensure the elasticity of the press. The fixed seat is used to fix the button and spring to ensure their positions unchanged. The conductive contact is a key part of the circuit and is connected by pressing the button to make the contact on or off the circuit, thereby realizing the function of the switch.

[0047] The motor switch can control the on-off of the motor by pressing and releasing, and the electric push rod switch can make the electric push rod pass through forward and reverse currents by pressing and releasing, respectively, so as to make the electric push rod reverse.

[0048] After a certain time of crushing, the motor is first powered off by pressing the motor switch, and then the electric push rod 21 passes through the forward current by pressing the electric push rod switch, so that the electric push rod 21 is elongated and drives the scraper 9 to move towards the direction of the screen 8. When the scraper 9 contacts the rack 11, the rack 11 is pushed to drive the gear 10 to rotate, and the gear 10 drives the screen 8 to rotate through the rotating shaft. At this time, the coiled spring 15 is compressed to store energy, and the screen 8 rotates from the upward inclined angle to the downward inclined angle. At this time, the material pushed by the scraper 9 rolls down along the screen 8, increasing the screening area and stroke.

[0049] The switch of the electric push rod 21 is released, the electric push rod 21 passes through the reverse current, the electric push rod 21 reverses, and the electric push rod 21 is retracted to drive the scraper 9 to disengage from the rack 11. The coiled spring 15 releases the elastic force to drive the gear 10 and the screen 8 to reset, and the screen 8 becomes an upward inclined state. At this time, the material that does not meet the crushing requirements will roll down along the screen 8 again. The motor is powered on by releasing the motor switch to facilitate further crushing.

[0050] A inclined receiving plate is arranged below the screen 8, and a discharge port 13 is formed in the box 1. The receiving plate corresponds to the discharge port 13, and a blocking plate 14 slides in the discharge port 13.

[0051] The screened material can reach the position of the discharge port 13 along the receiving plate, the blocking plate 14 is pulled out, the discharge port 13 is opened, and then the material is collected.

[0052] A collection box 12 is placed below the discharge port 13 to collect the crushed material.

[0053] The other end of the screen 8 is fixed with a baffle, and a vibrator 16 is also fixed on the screen 8.

[0054] The baffle can reduce the probability of large particle materials falling from the gap when the material rolls down and is screened.

[0055] The vibrator 16 is electrically connected with the electric push rod switch. When the switch is pressed, the vibrator 16 starts to work, so that the screen 8 vibrates, and the screening efficiency of the screen 8 is improved.

[0056] The box body 1 is provided with a storage box 17 at the top. The storage box 17 is connected with a feeding pipe at the bottom. The feeding pipe is rotatably connected with a feeding disc 18. The feeding disc 18 is provided with a feeding opening.

[0057] The feeding disc 18 continuously rotates, so that the feeding opening provided on the feeding disc 18 realizes intermittent feeding. This is beneficial to reduce the problem that too much material is put in at one time, and the crushing efficiency is low.

[0058] The spline shaft 2 is fixedly sleeved with a worm 19. The worm 19 is matched with a worm wheel 20 on one side. The worm wheel 20 is connected with the feeding disc 18.

[0059] The box body 1 is provided with an inspection door. The inspection door is provided with a transparent observation window.

[0060] The observation window can enable the operator to observe the crushing condition of the material in time. The operator can press the switch in time to screen the material. This is beneficial to avoid the problem that the material is still accumulated after being crushed, and the crushing of the subsequent falling material is affected.

[0061] Specific working process:

[0062] S1: The storage box 17 is filled with the material to be crushed. Then the power supply is started, and the motor starts to drive the spline shaft 2 to rotate.

[0063] S2: The spline shaft 2 drives the feeding disc 18 to rotate through the worm 19 and the worm wheel 20. The feeding disc 18 intermittently feeds the crushing plate 4 through the feeding pipe.

[0064] S3: The spline shaft 2 drives the hammer handle and the cylindrical cam 5 to rotate. When the falling section 61 cooperates with the slide rod 7, the hammer head 3 freely falls to crush the material on the crushing plate 4. With the continuous rotation of the cylindrical cam 5, the pressing section 64 contacts the slide rod 7. At this time, under the action of the inclined surface of the pressing section 64, the cylindrical cam 5 drives the hammer head 3 to continue to walk downward for a distance. On the basis of the gravity of the hammer head 3, the pressure on the material is further increased.

[0065] S4: The cylindrical cam 5 continues to rotate. The grinding section 62 contacts the slide rod 7. The cylindrical cam 5 drives the hammer head 3 to rotate to grind the material. When the cylindrical cam 5 rotates from the grinding section 62 to the lifting section 63, the lifting section 63 relatively slides with the slide rod 7 to drive the cylindrical cam 5 and the hammer head 3 to ascend. The cylindrical cam 5 and the hammer head 3 continue to rotate until the falling section 61 cooperates with the slide rod 7 again.

[0066] S5: the operator observes that the material is broken to a certain extent, presses the switch of the motor and the electric push rod, the motor is powered off, the electric push rod 21 and the vibrator 16 are powered on, the electric push rod 21 pushes the scraper 9 to slide, and the material reaches the position of the screen 8, the scraper 9 simultaneously makes the screen 8 rotate from the upward inclined angle to the downward inclined angle through the rack 11 and the gear 10, so that the material pushed by the scraper 9 can be sieved downward along the screen 8;

[0067] S6: after the sieving is completed, the switch of the motor and the electric push rod is released, the motor is restarted, the electric push rod 21 is retracted, the scraper 9 is reset, and the screen 8 is also reset under the action of the coil spring 15, at this time, the sieved material falls on the receiving plate, and the blocking plate on the discharge port 13 is opened, so that the sieved material can be collected.

[0068] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A crude lactide pulverizing device, comprising a housing (1), characterized in that, The housing (1) is provided with a spline shaft (2). One end of the spline shaft (2) is directly connected to a power component that can drive the spline shaft (2) to rotate. The other end is slidably fitted with a hammer handle for crushing coarse lactide. The hammer handle is connected to a hammer head (3). A crushing plate (4) for receiving materials is provided below the hammer head (3). A cylindrical cam (5) that can drive the hammer handle to slide is fixedly fitted on the hammer handle. The cylindrical cam (5) has a sliding groove (6). A sliding rod (7) is fixed on the housing (1). The sliding rod (7) is slidably connected to the sliding groove (6).

2. The crude lactide pulverizing device according to claim 1, characterized in that, The chute (6) includes a falling section (61), a grinding section (62) and a lifting section (63). One end of the falling section (61) is connected to the lifting section (63) through the grinding section (62), and the other end of the falling section (61) is connected to the other end of the lifting section (63).

3. The crude lactide pulverizing device according to claim 2, characterized in that, A pressing section (64) is also provided between the falling section (61) and the grinding section (62).

4. The crude lactide pulverizing device according to claim 1, characterized in that, A screen (8) is provided on one side of the crushing plate (4), and a scraper (9) slides on the other side of the crushing plate (4). A driving component is provided on one side of the scraper (9) to drive the scraper (9) to slide. The scraper (9) can push the material onto the screen (8) for screening.

5. The crude lactide pulverizing device according to claim 4, characterized in that, A rotating shaft is provided on the crushing plate (4), one end of the screen (8) is fixed to the rotating shaft, the screen (8) and the crushing plate (4) are at an angle, and a coil spring (15) is coaxially fixed on the rotating shaft to drive the screen (8) to maintain the angle; a gear (10) is also fixedly sleeved on the rotating shaft, and a rack (11) is fitted on one side of the gear (10), and the rack (11) is fitted with the scraper (9).

6. The crude lactide pulverizing device according to claim 5, characterized in that, An inclined receiving plate is provided below the screen (8), and a discharge port (13) is provided on the box (1). The receiving plate corresponds to the discharge port (13), and a sealing plate (14) slides inside the discharge port (13).

7. The crude lactide pulverizing device according to claim 5, characterized in that, A baffle is fixed to the other end of the screen (8), and a vibrator (16) is also fixed on the screen (8).

8. The crude lactide pulverizing device according to claim 1, characterized in that, The top of the box (1) is provided with a storage box (17), the bottom of the storage box (17) is connected to a discharge pipe, and a feeding plate (18) is rotatably connected inside the discharge pipe. The feeding plate (18) has a feeding port.

9. A crude lactide pulverizing device according to claim 8, characterized in that, A worm gear (19) is fixedly sleeved on the spline shaft (2), and a worm wheel (20) is fitted on one side of the worm gear (19). The worm wheel (20) is connected to the feeding disc (18).

10. A crude lactide pulverizing device according to claim 1, characterized in that, The housing (1) is provided with an inspection door, and the inspection door is provided with a transparent observation window.

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