Rotary precoated sand feeding device

Abstract

The utility model relates to a precoated sand rotary feeding device, which relates to the field of precoated sand production and processing devices, and comprises a shell, a feeding pipe and a discharging pipe which are communicated with the shell, a spiral conveying mechanism arranged in the shell, an anti-blocking mechanism arranged in the feeding pipe, and a dredging mechanism arranged in the discharging pipe, the anti-blocking mechanism comprises a first mounting plate arranged in the feeding pipe and a first transmission motor arranged on the first mounting plate, a transmission shaft of the first transmission motor is connected with a rotating rod, and a spiral blade is arranged on the rotating rod; a mounting hole is formed in the discharging pipe, the dredging mechanism comprises a dredging rod, one end of the dredging rod is connected with a driving assembly, the other end of the dredging rod is connected with a dredging head, the dredging rod penetrates through the mounting hole and is slidably connected with the discharging pipe, and the driving assembly drives the dredging rod to stretch out and draw back. The precoated sand processing device has the effects that the phenomenon that the feeding device is blocked is reduced, and the processing efficiency of precoated sand is improved.

Description

Technical Field

[0001] The present application relates to the field of coated sand production and processing equipment, and in particular to a coated sand rotary feeding device. Background Art

[0002] Coated sand is a type of molding sand or core sand that is covered with a layer of solid resin film before molding. The coating process of coated sand is mainly divided into two methods: cold method and hot method. In the cold method, ethanol is used to dissolve the resin, and hexamethylenetetramine is added during the sand mixing process, so that the two are coated on the surface of the sand particles, and the ethanol evaporates to obtain coated sand; in the hot method, the sand is preheated to a certain temperature, the resin is added to melt it, and the resin is stirred to coat the surface of the sand particles, and a hexamethylenetetramine aqueous solution and a lubricant are added, and the coated sand is obtained by cooling, crushing, and screening.

[0003] During the processing, the coated sand needs to enter various processing equipment through the feeding device. However, the coated sand will be in a viscous fluid state before it is completely dry. The viscous coated sand fluid is easy to accumulate in the feed pipe and discharge pipe of the feeding device, causing the feeding device to be blocked, thereby reducing the conveying efficiency of the coated sand and reducing the processing efficiency of the coated sand.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the coated sand is easily accumulated in the feed pipe and the discharge pipe, which reduces the conveying efficiency of the coated sand and thus reduces the processing efficiency of the coated sand. Utility Model Content

[0005] In order to solve the problem that coated sand easily accumulates in the feed pipe and the discharge pipe, reducing the conveying efficiency of the coated sand and thus reducing the processing efficiency of the coated sand, the present application provides a rotary feeding device for coated sand.

[0006] The present application provides a coated sand rotary feeding device, which adopts the following technical solution:

[0007] A rotary feeding device for coated sand comprises a shell, a feed pipe and a discharge pipe connected to the shell, a spiral conveying mechanism arranged in the shell, an anti-clogging mechanism arranged in the feed pipe and a dredging mechanism arranged in the discharge pipe; the anti-clogging mechanism comprises a first mounting plate arranged in the feed pipe and a first transmission motor arranged on the first mounting plate, the transmission shaft of the first transmission motor is connected with a rotating rod, and the rotating rod is provided with spiral blades; a mounting hole is opened on the discharge pipe, and the dredging mechanism comprises a dredging rod, one end of the dredging rod is connected with a driving assembly, and the other end is connected with a dredging head, the dredging rod passes through the mounting hole and is slidably connected with the discharge pipe, and the driving assembly drives the dredging rod to extend and retract.

[0008] By adopting the above technical solution, the first transmission motor drives the rotating rod and the spiral blade to rotate, and the spiral blade transports the coated sand in the feed pipe, thereby reducing the accumulation of coated sand in the feed pipe. The driving component drives the dredging rod and the dredging head to perform telescopic movement, so that the dredging head and the dredging rod dredge the coated sand blocked in the discharge pipe, thereby reducing the accumulation of coated sand in the discharge pipe. The anti-blocking mechanism and the dredging mechanism reduce the accumulation and blockage of coated sand in the feed pipe and the discharge pipe, thereby improving the transportation efficiency of the coated sand, and then improving the processing efficiency of the coated sand.

[0009] Optionally, a connecting rod is connected to the rotating rod, and a scraper is connected to one end of the connecting rod away from the rotating rod, and the scraper abuts against the inner wall of the feeding pipe.

[0010] By adopting the above technical solution, the rotating rod drives the connecting rod and the scraper to rotate when rotating, and the scraper scrapes off the coated sand adhering to the inner wall of the feed pipe, thereby reducing the accumulation of the coated sand and increasing the conveying efficiency of the coated sand.

[0011] Optionally, the driving assembly includes a second mounting plate arranged on the outer tube wall of the discharge pipe and an electric telescopic rod arranged on the second mounting plate, and one end of the electric telescopic rod away from the second mounting plate is connected to the dredging rod.

[0012] By adopting the above technical solution, the electric telescopic rod drives the dredging rod and the dredging head to perform telescopic movement, so that the dredging head and the dredging rod can dredge and clean the coated sand accumulated in the discharge pipe.

[0013] Optionally, a second transmission motor is connected to one end of the electric telescopic rod away from the second mounting plate, and a transmission shaft of the second transmission motor is connected to the dredging rod.

[0014] By adopting the above technical scheme, the second transmission motor drives the dredging rod to rotate, and the dredging rod and the dredging head rotate while extending and retracting, thereby improving the efficiency of the dredging head and the dredging rod in inserting the agglomerated coated sand, thereby improving the dredging and cleaning efficiency of the dredging rod and the dredging head in the discharge pipe.

[0015] Optionally, the dredging head is rotatably connected to a dredging plate at one end close to the dredging rod, a side of the dredging plate close to the dredging rod is connected to a limiting spring, and an end of the limiting spring away from the dredging plate is connected to the dredging rod.

[0016] By adopting the above technical solution, during the process of inserting the coated sand into the dredging head, the dredging plate rotates towards the dredging rod. When the electric telescopic rod drives the dredging rod to retract, the dredging plate is subjected to the resistance of the coated sand and rotates away from the dredging rod, thereby opening the dredging plate. The limit spring limits the dredging plate, so that the dredging plate takes away part of the coated sand during the retraction process, thereby causing part of the coated sand to fall off. The dredging rod reciprocates and retracts several times, and the coated sand accumulated in the discharge pipe can be cleaned up. The setting of the dredging plate increases the dredging efficiency of the dredging mechanism, thereby increasing the conveying efficiency of the coated sand.

[0017] Optionally, there are multiple dredging plates, and the multiple dredging plates are arranged in a circular array.

[0018] By adopting the above technical solution, multiple dredging plates increase the amount of coated sand taken away, thereby improving the dredging efficiency of the discharge pipe.

[0019] Optionally, a plurality of pressure relief grooves are provided on the side wall of the dredging head, and the plurality of pressure relief grooves are evenly distributed on the dredging head.

[0020] By adopting the above technical solution, the provision of the pressure relief groove reduces the resistance encountered by the dredging head during the insertion of the agglomerated coated sand, improves the dredging efficiency of the dredging head, reduces the wear on the dredging head, and increases the service life of the dredging head.

[0021] Optionally, a protective cover is connected to the first mounting plate, and the protective cover is arranged above the first transmission motor.

[0022] By adopting the above technical solution, the protective cover protects the first transmission motor, reduces the wear or blockage of the first transmission motor by the coated sand, and thus increases the service life of the first transmission motor.

[0023] Optionally, a sealing gasket is provided in the mounting hole, and the dredging rod is slidably connected to the sealing gasket.

[0024] By adopting the above technical solution, the setting of the sealing gasket reduces the phenomenon of the coated sand falling into the installation hole, thereby reducing the phenomenon of the coated sand causing the installation hole to be blocked and then causing the dredging rod to be not smoothly extended and retracted, thereby improving the dredging efficiency of the dredging mechanism for the discharge pipe.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The first transmission motor drives the rotating rod and the spiral blade to rotate, and the coated sand in the feed pipe is transported. The rotating rod drives the scraper to rotate, and the scraper scrapes off the coated sand on the inner wall of the feed pipe, thereby increasing the dredging efficiency of the feed pipe and reducing the blockage of the feed pipe;

[0027] 2. The second transmission motor drives the dredging rod to rotate, and the electric telescopic rod drives the dredging rod to extend and retract, thereby improving the dredging efficiency of the discharge pipe;

[0028] 3. The setting of the dredging plate enables the dredging rod to take away part of the coated sand when it retracts, thereby realizing rapid dredging of the discharge pipe, improving the dredging efficiency of the discharge pipe, and thus improving the conveying efficiency of the coated sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the cross-sectional structure of a rotary feeding device for coated sand;

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of the feed pipe and the anti-blocking mechanism;

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of the discharge pipe and the dredging mechanism;

[0032] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0033] Explanation of the reference numerals: 1. Shell; 2. Feed pipe; 3. Discharge pipe; 31. Mounting hole; 32. Sealing gasket; 4. Screw conveying mechanism; 41. Drive motor; 42. Conveying rod; 43. Conveying blade; 5. Anti-blocking mechanism; 51. First mounting plate; 52. First transmission motor; 53. Rotating rod; 54. Spiral blade; 55. Connecting rod; 56. Scraper; 57. Protective cover; 6. Dredge mechanism; 61. Dredge rod; 62. Drive assembly; 621. Second mounting plate; 622. Electric telescopic rod; 623. Second transmission motor; 63. Dredge head; 631. Pressure reducing groove; 64. Dredge plate; 65. Limit spring. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses a rotary feeding device for coated sand.

[0036] Reference Figure 1 and Figure 2 A rotary feeding device for coated sand includes a shell 1, a feeding pipe 2 and a discharging pipe 3 fixedly connected to the shell 1, a spiral conveying mechanism 4 arranged in the shell 1, an anti-blocking mechanism 5 arranged in the feeding pipe 2 and a dredging mechanism 6 arranged in the discharging pipe 3.

[0037] The screw conveying mechanism 4 includes a driving motor 41 fixedly connected to the housing, a driving shaft of the driving motor 41 is fixedly connected to a conveying rod 42, and a conveying blade 43 is fixedly connected to the conveying rod 42. One end of the conveying rod 42 away from the driving motor 41 is rotatably connected to the housing 1 through a bearing.

[0038] The anti-blocking mechanism 5 includes a first mounting plate 51 fixedly arranged in the feed pipe 2 and a first transmission motor 52 fixedly arranged on the first mounting plate 51. The transmission shaft of the first transmission motor 52 is fixedly connected with a rotating rod 53, and a spiral blade 54 is fixedly arranged on the rotating rod 53. A connecting rod 55 is fixedly connected to the rotating rod 53, and a scraper 56 is fixedly connected to one end of the connecting rod away from the rotating rod 53, and the scraper 56 abuts against the inner wall of the feed pipe 2. A protective cover 57 is fixedly connected to the first mounting plate 51, and the protective cover 57 is arranged above the first transmission motor 52.

[0039] Reference Figure 3 and Figure 4 The dredging mechanism 6 includes a dredging rod 61, one end of which is connected to a driving assembly 62, and the other end is fixedly connected to a dredging head 63. A mounting hole 31 is provided on the discharge pipe 3, and the dredging rod 61 passes through the mounting hole 31. A sealing gasket 32 ​​is fixedly provided in the mounting hole 31, and the dredging rod 61 is slidably connected to the sealing gasket 32. The driving assembly 62 drives the dredging rod 61 to extend and retract. In the embodiment of the present application, the number of dredging mechanisms 6 is two, and the two dredging mechanisms 6 are symmetrically arranged in the discharge pipe 3.

[0040] The driving assembly 62 includes a second mounting plate 621 fixedly mounted on the outer wall of the discharge pipe 3 and an electric telescopic rod 622 fixedly mounted on the second mounting plate 621. The electric telescopic rod 622 is fixedly connected to a second transmission motor 623 at one end away from the second mounting plate 621. The transmission shaft of the second transmission motor 623 is fixedly connected to the dredging rod 61. The dredging rod 61, the electric telescopic rod 622 and the second transmission motor 623 are all arranged obliquely and in a straight line. The obliquely arranged dredging rod 61 is conducive to improving the dredging efficiency of the discharge pipe 3.

[0041] The end of the dredging head 63 close to the dredging rod 61 is rotatably connected to the dredging plate 64 through a hinge, and the side of the dredging plate 64 close to the dredging rod 61 is fixedly connected to the limit spring 65, and the end of the limit spring 65 away from the dredging plate 64 is fixedly connected to the dredging rod 61. In the embodiment of the present application, the number of dredging plates 64 is four, and the four dredging plates 64 are arranged in a circular array. Four decompression grooves 631 are opened on the side wall of the dredging head 63, and the four decompression grooves 631 are evenly distributed on the dredging head 63.

[0042] The implementation principle of a rotary feeding device for coated sand in an embodiment of the present application is as follows: a first transmission motor 52 drives a rotating rod 53 to rotate, the rotating rod 53 drives a spiral blade 54 and a scraper 56 to rotate, the spiral blade 54 pushes the coated sand in the feed pipe 2 to move, and the scraper 56 scrapes off the coated sand adhering to the inner wall of the feed pipe 2, thereby allowing the coated sand to pass through the feed pipe 2 smoothly, reducing the phenomenon of coated sand being blocked in the feed pipe 2. When the discharge pipe 3 is clogged by accumulated coated sand, the electric telescopic rod 622 drives the dredging rod 61 to extend and retract, and the second transmission motor 623 drives the dredging rod 61 to rotate, so that the dredging head 63 and the dredging rod 61 are inserted into the coated sand, and the dredging plate 64 rotates in the direction close to the dredging rod 61 as the dredging rod 61 is inserted into the coated sand. When the dredging rod 61 retracts, the dredging plate 64 is subjected to resistance and rotates in the direction away from the dredging rod 61, thereby increasing the contact area between the dredging plate 64 and the coated sand. When the dredging rod 61 retracts, the dredging plate 64 opens, and the limit spring 65 limits the dredging plate 64, so that the dredging plate 64 takes away part of the coated sand, and part of the coated sand falls and leaves the discharge pipe 3. The dredging rod 61 reciprocates and extends several times, so that all the accumulated coated sand falls, thereby achieving dredging of the discharge pipe 3.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotary feeding device for coated sand, characterized in that: The invention comprises a housing (1), a feed pipe (2) and a discharge pipe (3) connected to the housing (1), a screw conveying mechanism (4) arranged in the housing (1), an anti-blocking mechanism (5) arranged in the feed pipe (2), and a dredging mechanism (6) arranged in the discharge pipe (3); the anti-blocking mechanism (5) comprises a first mounting plate (51) arranged in the feed pipe (2) and a first transmission motor (52) arranged on the first mounting plate (51); the first transmission motor (52) The transmission shaft is connected to a rotating rod (53), and a spiral blade (54) is arranged on the rotating rod (53); a mounting hole (31) is opened on the discharge pipe (3); the dredging mechanism (6) comprises a dredging rod (61), one end of the dredging rod (61) is connected to a driving component (62), and the other end is connected to a dredging head (63); the dredging rod (61) passes through the mounting hole (31) and is slidably connected to the discharge pipe (3); the driving component (62) drives the dredging rod (61) to extend and retract.

2. A coated sand rotary feeding device according to claim 1, characterized in that: The rotating rod (53) is connected to a connecting rod (55), and one end of the connecting rod away from the rotating rod (53) is connected to a scraper (56), and the scraper (56) abuts against the inner wall of the feeding pipe (2).

3. The coated sand rotary feeding device according to claim 1, characterized in that: The driving assembly (62) comprises a second mounting plate (621) arranged on the outer tube wall of the discharge tube (3) and an electric telescopic rod (622) arranged on the second mounting plate (621), and one end of the electric telescopic rod (622) away from the second mounting plate (621) is connected to the dredging rod (61).

4. A coated sand rotary feeding device according to claim 3, characterized in that: One end of the electric telescopic rod (622) away from the second mounting plate (621) is connected to a second transmission motor (623), and a transmission shaft of the second transmission motor (623) is connected to the dredging rod (61).

5. The coated sand rotary feeding device according to claim 4, characterized in that: One end of the dredging head (63) close to the dredging rod (61) is rotatably connected to a dredging plate (64); one side of the dredging plate (64) close to the dredging rod (61) is connected to a limit spring (65); and one end of the limit spring (65) away from the dredging plate (64) is connected to the dredging rod (61).

6. A coated sand rotary feeding device according to claim 5, characterized in that: The number of the dredging plates (64) is multiple, and the multiple dredging plates (64) are arranged in a circular array.

7. A coated sand rotary feeding device according to claim 6, characterized in that: A plurality of pressure relief grooves (631) are provided on the side wall of the dredging head (63), and the plurality of pressure relief grooves (631) are evenly distributed on the dredging head (63).

8. The coated sand rotary feeding device according to claim 1, characterized in that: A protective cover (57) is connected to the first mounting plate (51), and the protective cover (57) is arranged above the first transmission motor (52).

9. The coated sand rotary feeding device according to claim 1, characterized in that: A sealing gasket (32) is provided in the mounting hole (31), and the dredging rod (61) is slidably connected to the sealing gasket (32).

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