Grading control screening device for molding sand

Abstract

The invention relates to the technical field of molding sand screening devices, in particular to a molding sand grading control screening device which comprises a supporting frame, a screening barrel is rotationally matched with the inner wall of the supporting frame, a driving motor is arranged on the upper side of the supporting frame, and a linkage assembly is arranged between the output end of the driving motor and the screening barrel. Through the arrangement of the driving motor, the linkage assembly, the sweeping rod, the brush, the driving gear, the driven gear and other parts, in the rotating process of the screening barrel, the driving gear can correspondingly rotate along with the screening barrel, then the driving gear drives the driven gear to rotate, and the sweeping rod and the brush are driven to correspondingly rotate; in this way, in the screening process, gaps of the screening cylinder are cleaned in a rolling mode, particles blocking or blocking the gaps are brushed off in time, the screening cylinder is kept smooth all the time, it is guaranteed that molding sand can smoothly pass through the screen to be screened, the normal screening function of the screening cylinder is maintained, and the screening efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molding sand screening devices, in particular to a molding sand grading control and screening device. Background Art

[0002] Molding sand is the molding material used to make sand molds in foundry production. During the mining, transportation, storage and recycling processes, molding sand is often mixed with various impurities, such as fine mud, wood chips, metal chips, etc. If these impurities are not removed, they may be integrated into the casting when pouring the molten metal, forming inclusions, reducing the mechanical properties of the casting, and even causing the casting to be scrapped in severe cases. Usually, a screening device is needed to separate these impurities from the molding sand, making the molding sand purer and meeting the strict requirements of the casting process for molding sand quality. Among them, the molding sand screening device is used to grade the particle size of the molding sand for casting and remove impurities to ensure the quality and performance of the molding sand. Its principle is usually to feed the molding sand from the feed port into the rotating drum screen. Under the rotation of the drum, the molding sand rolls and moves in the drum, and is screened by screens of different apertures. The molding sand particles that meet the aperture requirements pass through the screen and fall, while the larger particles continue to move in the drum until they are discharged from the discharge port.

[0003] Through searching, Chinese patent application number CN202322787172.5 discloses a casting sand screening device for casting, which relates to the field of casting sand screening technology. The casting sand screening device comprises a base, the upper surface of the base is an inclined surface and is connected to hollow fixed plates on both sides, the inner surfaces of the two fixed plates are rotatably connected to rotating plates, and two hollow connecting plates are arranged between the two rotating plates. Through the provided screen and rotating plate and other structures, after the molding sand enters the screen, the dual-axis motor will drive the screen to rotate and screen the molding sand. The molding sand will pass through three screens in sequence. Since the sieve holes of the three screens are increased in sequence, the molding sand will be screened in order from small to large particle size. Compared with the prior art, the molding sand of different particle sizes is screened in sequence by screens with different sieve hole diameters, so that the molding sand particle size screened by the device is no longer single, which can meet the demand for different molding sand particle sizes when casting different castings.

[0004] Regarding the above-mentioned related technologies, the inventors found the following defects: during use, when there are more impurities mixed in the molding sand, such as fine mud blocks, wood chips, resin residues, etc., these impurities may get stuck in the screen holes, or stick to and accumulate with the molding sand particles, and gradually clog the screen over time, so that the screening function of the drum screen is blocked and filtering is inconvenient. At the same time, in the process of screening the molding sand, since the screening relies on vibration, rotation and other methods to drive the molding sand to move on the screen to achieve screening, the molding sand is constantly thrown and turned over during the screening process, and a large number of fine particles are suspended in the air, generating dust, polluting the environment, and affecting the health of the operators. Summary of the Invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a molding sand classification control and screening device.

[0006] The present invention provides a molding sand grading control and screening device, which adopts the following technical solution: comprising a support frame, the inner wall of which is rotatably engaged with a screening drum, a drive motor being provided on the upper side of the support frame, and a linkage assembly being provided between the output end of the drive motor and the screening drum;

[0007] A cleaning rod is rotatably engaged with one side of the inner wall of the support frame, a brush is fixedly connected to the cleaning rod, a driving gear is provided on the outer side of the screening cylinder, and a driven gear that cooperates with the driving gear is fixedly connected to the cleaning rod, a grading screening assembly is provided on the lower side of the inner wall of the support frame, a dust extraction assembly is provided on the upper side of the support frame, and a sealing plate is slidably engaged with one side of the support frame.

[0008] Optionally, the linkage assembly includes a driving sprocket fixedly connected to the output end of the driving motor, an outer sprocket fixedly connected to the screening drum, and a chain arranged on the outside of the driving sprocket and the outer sprocket.

[0009] Optionally, the grading screening assembly includes a support block fixedly connected to the inner wall of the support frame, multiple springs fixedly connected to the upper side of the support block, an assembly frame fixedly connected to the upper ends of the multiple springs, a filter screen arranged on the inner wall of the assembly frame, a collection frame slidingly fitted on the lower side of the inner wall of the support frame and located on the lower side of the filter screen, and two vibration motors fixedly connected to the upper side of the assembly frame.

[0010] Optionally, the dust extraction assembly includes a flow port opened on the upper side of the support frame, a guide frame fixedly connected to the inner wall of the flow port, a maintenance port opened on the upper side of the guide frame, a filter frame arranged on the inner wall of the maintenance port, and two air pumps fixedly connected to one side of the wire frame.

[0011] Optionally, two guide grooves are provided on one side of the support frame, and the inner walls of the two guide grooves are slidably fitted with guide blocks fixedly connected to the sealing plate, and the upper side of the sealing plate is fixedly connected to two limit blocks.

[0012] Optionally, a force-bearing plate is fixedly connected to one side of the support frame, two locking holes are opened on one side of the force-bearing plate, a mounting block is fixedly connected to one side of the sealing plate, the inner wall of the mounting block is slidably fitted with a locking pin that cooperates with the locking hole, and a tension spring is arranged between the locking pin and the mounting block.

[0013] Optionally, a protective box is rotatably fitted on one side of the support frame, and a flow hole is opened on one side of the protective box.

[0014] Optionally, an observation port is provided on one side of the sealing plate, and a transparent plate is fixedly connected to the inner wall of the observation port.

[0015] In summary, the present invention has the following beneficial technical effects:

[0016] 1. The present invention is provided with components such as a driving motor, a linkage assembly, a cleaning rod, a brush, a driving gear, and a driven gear. During the rotation of the screening drum, the driving gear will follow and rotate accordingly, and then the driven gear will be driven to rotate by the driving gear, thereby driving the cleaning rod and the brush to rotate accordingly, thereby achieving rolling cleaning of the gaps of the screening drum during the screening process, timely brushing off particles that are blocking or have already blocked the gaps, keeping the screening drum unobstructed at all times, ensuring that the molding sand can pass through the screen smoothly and complete screening, maintaining the normal screening function of the screening drum, and improving screening efficiency.

[0017] 2. The present invention sets a dust extraction component, which can start the vacuum pump to extract air from the inside of the guide frame, and the sealing plate seals one side of the support frame. The gas enters from one side of the screening cylinder, and the air drives the dust generated during the screening process to pass through the filter frame for filtration, effectively reducing the number of dust particles suspended in the air, reducing the dust concentration, making the air in the workshop fresher, and improving the air quality of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the rear-view stereoscopic cross-section structure of an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a side-view stereoscopic structure of an embodiment of the present invention;

[0021] Figure 4 In the embodiment of the present invention Figure 3 A schematic diagram of the structure enlarged in the middle;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the support frame in an embodiment of the present invention;

[0023] Figure 6 In the embodiment of the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0024] Figure 7 It is a structural schematic diagram of a three-dimensional cross-section of a guide frame in an embodiment of the present invention.

[0025] Figure markings: 1. support frame; 2. screening cylinder; 3. driving motor; 4. linkage assembly; 401. driving sprocket; 402. outer sprocket; 403. chain; 5. cleaning rod; 6. brush; 7. driving gear; 8. driven gear; 9. graded screening assembly; 901. support block; 902. spring; 903. assembly frame; 904. filter screen; 905. collecting frame; 906. vibration motor; 10. dust extraction assembly; 101. flow port; 102. guide frame; 103. maintenance port; 104. filter frame; 105. vacuum pump; 11. sealing plate; 12. guide groove; 13. guide block; 14. limit block; 15. force plate; 16. locking hole; 17. mounting block; 18. locking pin; 19. tension spring; 20. protective box; 21. flow hole; 22. observation port; 23. transparent plate. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 —7 The present invention is described in further detail.

[0027] The embodiment of the present invention discloses a molding sand classification control and screening device. Figure 1-7 As shown, it includes a support frame 1, the inner wall of which is rotatably engaged with a screening drum 2, a drive motor 3 is provided on the upper side of the support frame 1, and a linkage assembly 4 is provided between the output end of the drive motor 3 and the screening drum 2; a cleaning rod 5 is rotatably engaged on one side of the inner wall of the support frame 1, a brush 6 is fixedly connected to the cleaning rod 5, a driving gear 7 is provided on the outer side of the screening drum 2, and a driven gear 8 that cooperates with the driving gear 7 is fixedly connected to the cleaning rod 5, a grading screening assembly 9 is provided on the lower side of the inner wall of the support frame 1, a dust extraction assembly 10 is provided on the upper side of the support frame 1, and a sealing plate 11 is slidably engaged on one side of the support frame 1.

[0028] See also Figure 3 The linkage assembly 4 includes a driving sprocket 401 fixedly connected to the output end of the driving motor 3, an outer sprocket 402 fixedly connected to the screening drum 2, and a chain 403 arranged on the outside of the driving sprocket 401 and the outer sprocket 402. When the driving motor 3 is started, the driving sprocket 401 rotates accordingly, and the corresponding outer sprocket 402 is driven to rotate through the chain 403, thereby driving the screening drum 2.

[0029] See also Figure 5 and Figure 6The grading screening component 9 includes a support block 901 fixedly connected to the inner wall of the support frame 1, a plurality of springs 902 fixedly connected to the upper side of the support block 901, an assembly frame 903 fixedly connected to the upper ends of the plurality of springs 902, a filter screen 904 arranged on the inner wall of the assembly frame 903, a collecting frame 905 slidingly fitted on the lower side of the inner wall of the support frame 1 and located under the filter screen 904, and two vibration motors 906 fixedly connected to the upper side of the assembly frame 903. When the vibration motor 906 is started, the assembly frame 903 shakes under the action of the spring 902, causing the filter screen 904 in the assembly frame 903 to vibrate, thereby achieving secondary screening. The filter screen 904 can be placed inside the assembly frame 903.

[0030] See also Figure 2 The dust extraction assembly 10 includes a flow port 101 opened on the upper side of the support frame 1, a guide frame 102 fixedly connected to the inner wall of the flow port 101, a maintenance port 103 opened on the upper side of the guide frame 102, a filter frame 104 arranged on the inner wall of the maintenance port 103, and two air pumps 105 fixedly connected to one side of the guide frame 102. The air pump 105 is used to extract the inside of the guide frame 102 to guide the internal gas of the support frame 1, and then the impurities in the flowing air are filtered through the filter frame 104 in the maintenance port 103 to collect dust during screening.

[0031] See also Figure 5 Two guide grooves 12 are provided on one side of the support frame 1. The inner walls of the two guide grooves 12 are slidably fitted with guide blocks 13 fixedly connected to the sealing plate 11. Two limit blocks 14 are fixedly connected to the upper side of the sealing plate 11. When the sealing plate 11 moves up and down, the limit blocks 14 slide in the corresponding guide blocks 13 to guide the sealing plate 11.

[0032] See also Figure 4 A force-bearing plate 15 is fixedly connected to one side of the support frame 1, and two locking holes 16 are opened on one side of the force-bearing plate 15. A mounting block 17 is fixedly connected to one side of the sealing plate 11. The inner wall of the mounting block 17 is slidably fitted with a locking pin 18 that cooperates with the locking hole 16. A tension spring 19 is provided between the locking pin 18 and the mounting block 17. The locking pin 18 is pulled by the tension spring 19, so that the mounting block 17 is inserted into the corresponding locking hole 16 on the force-bearing plate 15, thereby temporarily fixing the sealing plate 11.

[0033] See also Figure 3 One side of the support frame 1 is rotatably matched with a protective box 20, and a flow hole 21 is opened on one side of the protective box 20. The protective box 20 falls vertically, which can reduce the caliber of the air intake of the screening cylinder 2.

[0034] See also Figure 3An observation port 22 is provided on one side of the sealing plate 11 , and a transparent plate 23 is fixedly connected to the inner wall of the observation port 22 . The transparent plate 23 in the observation port 22 can be used to conveniently observe the interior of the support frame 1 .

[0035] The implementation principle of a molding sand grading control screening device according to an embodiment of the present invention is as follows: when in use, molding sand can be placed inside the screening drum 2, and the driving motor 3 is started to drive the active sprocket 401 to rotate, and then the active sprocket 401 drives the outer sprocket 402 to rotate through the chain 403, thereby turning the screening drum 2 over. During the turning process, the screening drum 2 performs a primary screening of the sand, and then the screened sand falls into the filter screen 904. The corresponding collection frame 905 is started to drive the assembly frame 903 and the filter screen 904 to vibrate, thereby performing a secondary filtration of the sand to achieve graded filtration.

[0036] During the rotation of the screening drum 2, its driving gear 7 will rotate accordingly, and then the driving gear 7 will drive the driven gear 8 to rotate, so as to drive the cleaning rod 5 and the brush 6 to rotate accordingly, so as to realize rolling cleaning of the gap of the screening drum 2 during the screening process, and timely brush off the particles that are blocking or have blocked the gap, so that the screening drum 2 is always kept unobstructed, ensuring that the molding sand can pass through the screen smoothly and complete the screening, maintaining the normal screening function of the screening drum 2 and improving the screening efficiency;

[0037] During the screening process, the vacuum pump 105 is started to evacuate the inside of the guide frame 102, and the sealing plate 11 seals one side of the support frame 1. The gas enters from one side of the screening cylinder 2. The air drives the dust generated during the screening process to pass through the filter frame 104 for filtration, effectively reducing the number of dust particles suspended in the air, reducing the dust concentration, making the air in the workshop fresher, and improving the air quality of the working environment.

[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A molding sand classification control and screening device, comprising a support frame (1), characterized in that: The inner wall of the support frame (1) is rotatably engaged with a screening drum (2), a driving motor (3) is provided on the upper side of the support frame (1), and a linkage assembly (4) is provided between the output end of the driving motor (3) and the screening drum (2); A cleaning rod (5) is rotatably engaged with one side of the inner wall of the support frame (1), a brush (6) is fixedly connected to the cleaning rod (5), a driving gear (7) is provided on the outer side of the screening cylinder (2), a driven gear (8) that cooperates with the driving gear (7) is fixedly connected to the cleaning rod (5), a graded screening assembly (9) is provided on the lower side of the inner wall of the support frame (1), a dust extraction assembly (10) is provided on the upper side of the support frame (1), and a sealing plate (11) is slidably engaged with one side of the support frame (1).

2. The molding sand classification control and screening device according to claim 1, characterized in that: The linkage assembly (4) comprises a driving sprocket (401) fixedly connected to the output end of the drive motor (3), an outer sprocket (402) fixedly connected to the screening drum (2), and a chain (403) arranged outside the driving sprocket (401) and the outer sprocket (402).

3. The molding sand classification control and screening device according to claim 1, characterized in that: The grading screening assembly (9) comprises a support block (901) fixedly connected to the inner wall of the support frame (1), a plurality of springs (902) fixedly connected to the upper side of the support block (901), an assembly frame (903) fixedly connected to the upper ends of the plurality of springs (902), a filter screen (904) arranged on the inner wall of the assembly frame (903), a collection frame (905) slidably fitted on the lower side of the inner wall of the support frame (1) and located below the filter screen (904), and two vibration motors (906) fixedly connected to the upper side of the assembly frame (903).

4. The molding sand classification control and screening device according to claim 1, characterized in that: The dust extraction assembly (10) comprises a flow port (101) provided on the upper side of the support frame (1), a guide frame (102) fixedly connected to the inner wall of the flow port (101), a maintenance port (103) provided on the upper side of the guide frame (102), a filter frame (104) arranged on the inner wall of the maintenance port (103), and two air extraction pumps (105) fixedly connected to one side of the wire frame (102).

5. The molding sand classification control and screening device according to claim 1, characterized in that: Two guide grooves (12) are provided on one side of the support frame (1), and the inner walls of the two guide grooves (12) are slidably fitted with guide blocks (13) fixedly connected to the sealing plate (11), and the upper side of the sealing plate (11) is fixedly connected to two limit blocks (14).

6. The molding sand classification control and screening device according to claim 1, characterized in that: A force-bearing plate (15) is fixedly connected to one side of the support frame (1), and two locking holes (16) are provided on one side of the force-bearing plate (15). A mounting block (17) is fixedly connected to one side of the sealing plate (11), and a locking pin (18) that is matched with the locking hole (16) is slidably fitted on the inner wall of the mounting block (17), and a tension spring (19) is provided between the locking pin (18) and the mounting block (17).

7. The molding sand classification control and screening device according to claim 1, characterized in that: A protective box (20) is rotatably fitted on one side of the support frame (1), and a flow hole (21) is provided on one side of the protective box (20).

8. The molding sand classification control and screening device according to claim 1, characterized in that: An observation port (22) is provided on one side of the sealing plate (11), and a transparent plate (23) is fixedly connected to the inner wall of the observation port (22).

Images