Green sand molding sand recycling processing equipment

Abstract

The present application relates to the field of molding sand recycling processing, and provides a kind of green foundry molding sand recycling processing equipment, including molding sand recovery cylinder, the vertical section of drive mounting seat is fixedly connected with the molding sand recovery cylinder, the horizontal section of drive mounting seat is erected in the upper end of the filter disc, drive mounting seat is rotatably connected with connecting shaft corresponding the center position of filter disc, the connecting shaft is fixedly connected with installation rod that extends along the radial direction of connecting shaft in the upper end of filter disc, installation rod is fixedly connected with filter mechanism in the position corresponding filter disc, the lower end of the filter disc is fixedly connected with processing cylinder.The setting of reciprocating mechanism, the rotation of rotating roller drives the movement of feeding belt, the baffle on feeding belt is up and down to the sand, so that the sand above is moved to the lower, while the sand below is brought to the upper, so as to improve the uniformity of sand heating.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of green sand recycling processing equipment. BACKGROUND

[0002] Casting industry is an industry with large resource and energy consumption, and easy to cause environmental pollution, and the commitment to energy saving and emission reduction, and promoting resource recycling is the duty of every foundry worker. About 90% of the sand in the wet type can be reused in the sand treatment system after pouring, and only less than 10% is discharged outside the system as waste sand, and other sand types must be regenerated after pouring or simply discharged outside the system as waste sand, so the main solid waste of sand casting production is waste sand, and a large amount of waste sand not only wastes resources, but also causes great harm to the environment around the foundry.

[0003] The recycling of waste sand is mainly by three ways: dry method, wet method and heating, and the dry method and wet method have greater impact on the environment, so in order to sustainable development, the heating method is generally used to remove the binder in the sand, but the existing regeneration processing equipment may not fully receive the heat of the sand below during use, and the internal sand is more difficult to heat after stacking, so the overall processing efficiency is poor. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a green sand recycling processing equipment, which comprises a sand recycling cylinder, the upper end of the sand recycling cylinder is fixedly connected with a filter disc, the lower end of the sand recycling cylinder is provided with a discharge port, the upper end of the sand recycling cylinder is provided with a driving mounting seat, the driving mounting seat is U-shaped, the vertical section of the driving mounting seat is fixedly connected with the sand recycling cylinder, the horizontal section of the driving mounting seat is arranged on the upper end of the filter disc, the center position of the filter disc is rotatably connected with a connecting shaft, the connecting shaft is fixedly connected with an installation rod extending radially along the connecting shaft at the upper end of the filter disc, the installation rod is fixedly connected with a filter mechanism at the position corresponding to the filter disc, and the lower end of the filter disc is fixedly connected with a grinding cylinder.

[0005] The filter mechanism comprises a mounting bracket, the mounting bracket is a U-shaped bracket, the mounting bracket is fixedly connected with the installation rod, a plurality of filter rollers are rotatably connected between the two side ends of the mounting bracket, a filter cloth is commonly rotatably connected with all the filter rollers, a plurality of groups of filter rods are uniformly distributed on the filter cloth, each group of filter rods comprises a plurality of filter rods arranged transversely on the filter cloth, and a driving shaft is fixedly connected with one of the filter rollers on the mounting bracket.

[0006] Furthermore: the connecting mounting plate is fixedly connected to the end of the drive shaft, and a drive pulley is rotatably connected to the upper and lower sides of the connecting mounting plate. The drive pulley on the upper side passes through the connecting mounting plate and is fixedly connected to the drive shaft. The two drive pulleys are connected by a connecting belt, and the driven gear is coaxially fixedly connected to the drive pulley on the lower side.

[0007] Furthermore: a drive gear is fixedly connected to the upper end of the filter disc, the drive gear is fixedly sleeved on the outside of the filter disc, the drive gear meshes with the driven gear, and a filter plate that tilts downward and extends to the outside of the molding sand recovery cylinder is suspended at the lower end of the mounting frame, the filter plate corresponding to the lower end of the upper side of the filter cloth.

[0008] Furthermore: a plurality of processing rods are evenly installed on the connecting shaft along its circumference, and a processing scraper is rotatably connected to the end of the processing rod. The processing scraper is in contact with the inner side of the grinding cylinder, and a reciprocating mechanism for material return is provided between the processing cylinder and the connecting shaft.

[0009] Furthermore: the reciprocating mechanism includes a main gear, a driven gear, a connecting and fixing plate, a rotating roller, and a feeding belt. The connecting and fixing plate is fixedly installed vertically on the inner side wall of the processing barrel. The upper end of the connecting and fixing plate extends towards the upper end of the grinding cylinder. A rotating roller is rotatably connected to each of the upper and lower ends of the connecting and fixing plate. The upper and lower rotating rollers are connected by a feeding belt. A baffle is fixedly provided on the outer side of the feeding belt. The driven gear is coaxially fixedly connected to the lower rotating roller. The main gear is coaxially fixedly connected to the connecting shaft. The driven gear meshes with the main gear.

[0010] Furthermore: both the connecting shaft and the processing rod are telescopic rods with built-in springs, and a first connecting block is fixedly connected to the lower end of the connecting shaft. A rotating rod is fixedly connected to the lower end of the first connecting block, and a second connecting block is provided below the first connecting block and rotatably connected to the rotating rod. The lower part of the second connecting block is fixedly connected to the bottom end of the molding sand recovery cylinder. An annular groove is formed on the upper surface of the second connecting block. The height of the left side of the groove is lower than the height of the right side. During the circumferential rotation of the connecting shaft, the first connecting block and the rotating rod at its lower end rotate synchronously. The rotating rod rotates along the groove on the surface of the second connecting block. Due to the different depths of the grooves, the connecting shaft is extended and retracted. At the same time, the processing scraper also moves up and down with the connecting shaft, which can change the range of action of the processing scraper.

[0011] Further, the lower end of the connecting shaft is provided with a discharging mechanism, the discharging mechanism comprises a first gear, a second gear, a connecting rotating shaft and a swing rod, the first gear is coaxially fixedly connected with the connecting shaft, the inner side wall of the processing barrel is rotationally provided with the connecting rotating shaft, the tail end of the connecting rotating shaft is fixedly connected with the second gear, the second gear is engaged with the first gear, the middle of the connecting rotating shaft is outwardly provided with a section, and the section is rotationally connected with the swing rod.

[0012] Further, the outer sides of the main gear and the slave gears are commonly provided with a dust cover, the outer sides of the first gear and the second gear are commonly provided with a dust cover, and the upper end and the lower end of the dust cover are rotationally connected with the connecting shaft, the side surface of the upper dust cover is rotationally connected with the outer sides of all the slave gears, and the side surface of the lower dust cover is rotationally connected with all the second gears.

[0013] Compared with the related art, the green sand recycling processing equipment has the following beneficial effects:

[0014] 1、The filter rod on the filter cloth can screen large-particle impurities, and the impurities are transported from the filter disc to the upper end of the mounting frame, fall into the filter plate below the filter cloth, and are transported along the filter plate to the outside of the sand recycling cylinder, so that the large-particle impurities in the sand are pretreated quickly.

[0015] 2、The reciprocating mechanism is provided, the upper sand is moved to the lower side by the rotation of the rotating roller and the up-and-down stirring of the baffle on the feeding belt, and the lower sand is brought to the upper side, so that the uniformity of sand heating is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the present application.

[0017] Figure 2 It is Figure 1 It is a local enlarged structure schematic view of A in the middle.

[0018] Figure 3 It is Figure 1 It is a local enlarged structure schematic view of B in the middle.

[0019] Figure 4 It is Figure 1 It is a sectional view of the installation position of the filter roller and the filter cloth in the middle.

[0020] Figure 5 It is Figure 3 It is a local enlarged structure schematic view of C in the middle.

[0021] Figure 6A sectional view of the reciprocating mechanism of the present application.

[0022] Figure 7 A plan view of the present application.

[0023] Figure 8 A sectional view of the structure in the present application Figure 1 An enlarged view of the first connecting block portion structure in the present application.

[0024] Figure 9 A sectional view of the structure in the present application Figure 8

[0025] Reference numerals in the drawing: 1, sand recycling cylinder; 2, filter disc; 11, discharge port; 12, drive mounting seat; 3, grinding cylinder; 4, connecting shaft; 41, first connecting block; 42, second connecting block; 43, rotating rod; 44, grinding plate; 5, drive shaft; 6, filtering mechanism; 61, connecting belt; 611, connecting mounting plate; 612, driving pulley; 614, driving gear; 615, driven gear; 62, filter roller; 63, filter cloth; 631, filter rod; 64, mounting frame; 65, filter plate; 7, processing rod; 71, processing scraper; 8, discharging mechanism; 81, first gear; 82, second gear; 83, connecting rotating shaft; 84, swing rod; 9, reciprocating mechanism; 91, main gear; 92, driven gear; 93, connecting fixed plate; 94, rotating roller; 95, feeding belt; 96, dust cover; 10, discharging disc. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0027] The specific implementation of the present application is described in detail below in combination with specific examples.

[0028] As Figure 1 , Figure 2 and Figure 3 ​As shown, the present application provides a kind of green foundry sand recycling processing equipment, including sand recovery cylinder 1, the upper end of the sand recovery cylinder 1 is fixedly connected with filter disc 2, the lower end of the sand recovery cylinder 1 is provided with discharge port 11, the upper end of the sand recovery cylinder 1 is provided with drive mounting seat 12, the drive mounting seat 12 is U-shaped, the vertical section of the drive mounting seat 12 is fixedly connected with the sand recovery cylinder 1, the horizontal section of the drive mounting seat 12 is erected on the upper end of the filter disc 2, the center position of the drive mounting seat 12 corresponding filter disc 2 is rotatably connected with connecting shaft 4, the connecting shaft 4 is fixedly connected with mounting rod extending along the radial direction of connecting shaft 4 on the upper end of filter disc 2, the mounting rod is fixedly connected with filter mechanism 6 at the position corresponding to filter disc 2, the lower end of the filter disc 2 is fixedly connected with grinding cylinder 3.

[0029] Before heating treatment is carried out to the sand, first, the sand is added to filter disc 2, then the rotation of connecting shaft 4 is driven by external driving element such as driving motor, connecting shaft 4 drives filter mechanism 6 to rotate circumferentially, filter mechanism 6 screens and cleans larger impurities in the sand, so that the sand can fall into grinding cylinder 3 from the through hole on filter disc 2, after falling into grinding cylinder 3, the sand is accumulated in grinding cylinder 3, the sand recovery cylinder 1 is structured with heat preservation layer on the outer layer and electric heating pipe installed inside, the inside of grinding cylinder 3 is brought to high temperature state by electric heating pipe, after heating of the sand is completed, the sand after heating is taken out by opening discharge port 11.

[0030] As shown in Figure 1 , Figure 2 and Figure 7 , the filter mechanism 6 includes mounting bracket 64, the mounting bracket 64 is U-shaped bracket, the mounting bracket 64 is fixedly connected with the mounting rod, a plurality of filter rollers 62 are rotatably connected between the two side ends of the mounting bracket 64, filter cloth 63 is commonly rotatably connected with all the filter rollers 62, a plurality of groups of filter rods 631 are uniformly distributed on the filter cloth 63, each group of filter rods 631 includes a plurality of filter rods 631 arranged transversely on the filter cloth 63, drive shaft 5 is fixedly connected with one of the filter rollers 62 on the mounting bracket 64.

[0031] As shown in Figure 1 , Figure 2 and Figure 6 , connecting mounting plate 611 is fixedly connected at the end of drive shaft 5, one driving pulley 612 is rotatably connected on each of the upper and lower sides of connecting mounting plate 611, the driving pulley 612 on the upper side is fixedly connected through connecting mounting plate 611 and drive shaft 5, the two driving pulleys 612 are connected by connecting belt 61, and the driving pulley 612 on the lower side is coaxially fixedly connected with driven gear 615.

[0032] As shown in Figure 1、 Figure 2 and Figure 6 As shown in the figure, the upper end of the filter disc 2 is fixedly connected with a driving gear 614, the driving gear 614 is fixedly sleeved on the outer side of the filter disc 2, the driving gear 614 is engaged with the driven gear 615, and the lower end of the mounting frame 64 is hung with a filter plate 65 which is inclined downward and extends to the outside of the sand recycling cylinder 1, and the filter plate 65 corresponds to the lower end of the upper side of the filter cloth 63.

[0033] In the process of the filtering mechanism 6 moving around the connecting shaft 4, the driven gear 615 is engaged with the driving gear 614 to rotate, the driven gear 615 drives the driving pulley 612 fixedly connected therewith to rotate, the driving pulley 612 drives the other driving pulley 612 to rotate through the connecting belt 61, and then the filter roller 62 rotates, the filter roller 62 drives the filter cloth 63 to rotate, the filter rod 631 on the filter cloth 63 screens the larger impurities, and the impurities are transported from the filter disc 2 to the upper end of the mounting frame 64 and fall on the filter plate 65 below the filter cloth 63, and finally are transported along the filter plate 65 to the outside of the sand recycling cylinder 1.

[0034] As shown in the figure, Figure 1 and Figure 3 A plurality of processing rods 7 are uniformly installed on the connecting shaft 4 along the circumference thereof, the distal end of the processing rod 7 is connected with a processing scraper 71, the processing scraper 71 is in close contact with the inner side of the grinding cylinder 3, and a reciprocating mechanism 9 for returning materials is arranged between the processing barrel 3 and the connecting shaft 4.

[0035] As shown in the figure, Figure 1 , Figure 4 , Figure 5 and Figure 6 The reciprocating mechanism 9 comprises a main gear 91, a driven gear 92, a connecting fixed plate 93, a rotating roller 94 and a feeding belt 95, the connecting fixed plate 93 is fixedly installed on the inner side wall of the processing barrel 3 in the vertical direction, the upper end of the connecting fixed plate 93 extends to the upper end of the grinding cylinder 3, one rotating roller 94 is rotatably connected to each of the upper and lower ends of the connecting fixed plate 93, the upper and lower rotating rollers 94 are connected through the feeding belt 95, the outer side of the feeding belt 95 is fixedly provided with a baffle, the lower rotating roller 94 is coaxially fixedly connected with the driven gear 92, the connecting shaft 4 is coaxially fixedly connected with the main gear 91, and the driven gear 92 is engaged with the main gear 91.

[0036] During the rotation of the connecting shaft 4, the processing rod 7 rotates with the connecting shaft 4, the processing scraper 71 on the processing rod 7 rubs against the inner side wall of the grinding cylinder 3, thereby scraping the sand adhering to the inner side wall of the grinding cylinder 3, the connecting shaft 4 drives the main gear 91 to rotate, the main gear 91 drives the from gear 92 to rotate, the from gear 92 drives the rotating roller 94 to rotate, the rotating roller 94 drives the feeding belt 95 to move, the baffle on the feeding belt 95 stirs the sand up and down, so that the sand above is moved to the lower, and the sand below is brought to the upper, thereby improving the uniformity of sand heating.

[0037] As shown in Figure 1 , Figure 8 and Figure 9 , the connecting shaft 4 and the processing rod 7 are both telescopic rods with built-in springs, and the lower end of the connecting shaft 4 is fixedly connected with a first connecting block 41, the lower end of the first connecting block 41 is fixedly connected with a rotating rod 43, and the lower side of the first connecting block 41 is provided with a second connecting block 42 rotatably connected with the rotating rod 43, the lower side of the second connecting block 42 is fixedly connected with the bottom end of the sand recycling cylinder 1, the upper end surface of the second connecting block 42 is provided with an annular groove, the height of the left side of the groove is lower than that of the right side, and during the circumferential rotation of the connecting shaft 4, the first connecting block 41 and the rotating rod 43 at the lower end of the connecting shaft 4 rotate synchronously, the rotating rod 43 rotates along the groove on the surface of the second connecting block 42, and because the depths of the grooves are different, the connecting shaft 4 is driven to expand and contract, and at the same time, the processing scraper 71 also moves up and down with the connecting shaft 4, so that the effective range of the processing scraper 71 can be changed.

[0038] As shown in Figure 1 , Figure 4 , Figure 5 and Figure 6 , the lower end of the connecting shaft 4 is provided with a discharging mechanism 8, the discharging mechanism 8 comprises a first gear 81, a second gear 82, a connecting shaft 83 and a swing rod 84, the first gear 81 is coaxially fixedly connected with the connecting shaft 4, the inner side wall of the processing barrel 3 is rotatably provided with the connecting shaft 83, the distal end of the connecting shaft 83 is fixedly connected with the second gear 82, the second gear 82 is engaged with the first gear 81, and the middle of the connecting shaft 83 has a section protruding outward, and the section is rotatably connected with the swing rod 84.

[0039] The upper end of the swing rod 84 is rotationally connected with a discharging disc 10, the discharging disc 10 is slidingly connected with the inner side wall of the processing barrel 3, and the connection is kept sealed to avoid sand falling from the connection, the upper end surface of the discharging disc 10 is tightly attached with the lower end surface of a grinding plate 44 vertically slidingly installed on the side wall of the connecting shaft 4, the grinding plate 44 is connected with the connecting shaft 4 with a spring, the longitudinal section of the grinding plate 44 is in an inverted trapezoidal structure, so that the sand enters between the grinding plate 44 and the discharging disc 10, the first gear 81 is rotationally connected with the grinding plate 44 following the connecting shaft 4, the grinding plate 44 can mill the sand accumulated on the discharging disc 10, at the same time, the first gear 81 drives the second gear 82 to rotate, the second gear 82 drives the rotation of the connecting rotating shaft 83, the connecting rotating shaft 83 makes the discharging disc 10 vibrate up and down through the swing rod 84, so that the sand passes through the through hole on the discharging disc 10 without accumulation.

[0040] As shown in Figure 1 , Figure 4 , Figure 5 and Figure 6 , the outer sides of the main gear 91 and the slave gear 92 are commonly sleeved with a dust cover 96, the outer sides of the first gear 81 and the second gear 82 are commonly sleeved with a dust cover 96, and the upper end and the lower end of the dust cover 96 are rotationally connected with the connecting shaft 4, the side surface of the upper dust cover 96 is rotationally connected with the outer sides of all the slave gears 92, and the side surface of the lower dust cover 96 is rotationally connected with all the second gears 82.

[0041] Working principle: before the sand is heated, the sand is first added to the filter disc 2, then the rotation of the connecting shaft 4 is driven by the external connecting belt 61 such as a driving motor, the connecting shaft 4 drives the filter mechanism 6 to rotate circumferentially, the connecting belt 61 drives the filter mechanism 6 to screen and clean the larger impurities in the sand, so that the sand can fall into the grinding cylinder 3 from the through hole on the filter disc 2, the sand is accumulated in the grinding cylinder 3 after falling into the grinding cylinder 3, the sand recycling cylinder 1 is provided with a heat preservation layer on the outer layer and an electric heating pipe installed inside, in the heating process, the inside of the grinding cylinder 3 reaches a high temperature state through the electric heating pipe, and after the heating of the sand is completed, the sand after heating is taken out through the opening of the discharge port 11;

[0042] In the process that the filtering mechanism 6 moves around the connecting shaft 4, the driven gear 615 is engaged with the driving gear 614 to rotate, the driven gear 615 drives the driving pulley 612 fixedly connected therewith to rotate, the driving pulley 612 drives the pulley fixedly connected with the filtering roller 62 through the connecting belt 61 to rotate, and then the filtering roller 62 rotates, the filtering roller 62 drives the filtering cloth 63 to rotate, the filtering rods 631 on the filtering cloth 63 screen the larger impurities, and the impurities are transported from the filtering disc 2 to the upper end of the mounting frame 64 and then fall into the filtering plate 65 below the filtering cloth 63 and are transported along the filtering plate 65 to the outside of the sand recycling cylinder 1;

[0043] In the process that the sand is milled by the processing rod 7, the processing rod 7 rotates with the connecting shaft 4, the processing scraper 71 on the processing rod 7 is pressed with the inner wall of the milling cylinder 3, so that the sand between the processing scraper 71 and the inner wall of the milling cylinder 3 is milled, the connecting shaft 4 drives the rotation of the main gear 91, the main gear 91 drives the rotation of the driven gear 92, the driven gear 92 drives the rotation of the rotating roller 94, and the rotation of the rotating roller 94 drives the movement of the feeding belt 95, the baffle on the feeding belt 95 stirs the sand up and down, so that the sand on the upper side is moved to the lower side, and the sand on the lower side is moved to the upper side, thereby improving the milling efficiency of the sand;

[0044] In the process that the filtering disc 2 is vertically vibrated by the discharging mechanism 8, the first gear 81 rotates with the connecting shaft 4, the first gear 81 drives the rotation of the second gear 82, the second gear 82 drives the rotation of the connecting shaft 83, and the connecting shaft 83 drives the up-and-down vibration of the discharging disc 10 through the swing rod 84, so that the sand passes through the through hole on the discharging disc 10 without accumulation.

[0045] The circuit and the control involved in the present application are prior art, and will not be described in detail here.

[0046] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation according to the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A green foundry molding sand recycling equipment, comprising a molding sand recycling cylinder (1), characterized in that, The upper end of the molding sand recovery cylinder (1) is fixedly connected to a filter disc (2), the lower end of the molding sand recovery cylinder (1) is provided with a discharge port (11), the upper end of the molding sand recovery cylinder (1) is provided with a drive mounting seat (12), the drive mounting seat (12) is U-shaped, the vertical section of the drive mounting seat (12) is fixedly connected to the molding sand recovery cylinder (1), the horizontal section of the drive mounting seat (12) is mounted on the upper end of the filter disc (2), the drive mounting seat (12) is rotatably connected to a connecting shaft (4) at the center position of the filter disc (2), the connecting shaft (4) is fixedly connected to an installation rod extending radially along the connecting shaft (4) at the upper end of the filter disc (2), the installation rod is fixedly connected to a filter mechanism (6) at the position corresponding to the filter disc (2), and the lower end of the filter disc (2) is fixedly connected to a grinding cylinder (3). The filtration mechanism (6) includes a mounting frame (64), which is a U-shaped frame. The mounting frame (64) is fixedly connected to the mounting rod. Multiple filter rollers (62) are rotatably connected between the two ends of the mounting frame (64). The filter rollers (62) are rotatably connected to a filter cloth (63). Multiple sets of filter rods (631) are evenly distributed on the filter cloth (63). Each set of filter rods (631) includes multiple filter rods (631) arranged laterally along the filter cloth (63). A drive shaft (5) is fixedly connected to one of the filter rollers (62) on the mounting frame (64). The lower end of the connecting shaft (4) is equipped with a feeding mechanism (8). The feeding mechanism (8) includes a first gear (81), a second gear (82), a connecting shaft (83), and a swing rod (84). The first gear (81) is coaxially and fixedly connected to the connecting shaft (4). The inner side wall of the grinding cylinder (3) is rotatably equipped with the connecting shaft (83). The end of the connecting shaft (83) is fixedly connected with the second gear (82). The second gear (82) meshes with the first gear (81). The middle of the connecting shaft (83) has an outwardly protruding section, and this section is rotatably connected to the swing rod (84). The upper end of the swing rod (84) is rotatably connected to the feeding disc (10).

2. The green foundry sand recycling equipment according to claim 1, characterized in that, The end of the drive shaft (5) is fixedly connected to a connecting mounting plate (611). Each of the upper and lower sides of the connecting mounting plate (611) is rotatably connected to a drive pulley (612). The drive pulley (612) on the upper side passes through the connecting mounting plate (611) and is fixedly connected to the drive shaft (5). The two drive pulleys (612) are connected by a connecting belt (61). The drive pulley (612) on the lower side is coaxially fixedly connected to a driven gear (615).

3. The green foundry sand recycling equipment according to claim 2, characterized in that, The upper end of the filter disc (2) is fixedly connected to a drive gear (614), the drive gear (614) is fixedly sleeved on the outside of the filter disc (2), the drive gear (614) meshes with the driven gear (615), and the lower end of the mounting bracket (64) is suspended with a filter plate (65) that tilts downward and extends to the outside of the molding sand recovery cylinder (1), the filter plate (65) corresponds to the lower end of the upper side of the filter cloth (63).

4. The green foundry sand recycling equipment according to claim 2, characterized in that, Multiple processing rods (7) are evenly installed on the connecting shaft (4) along its circumference. A processing scraper (71) is provided below the processing rod (7). The processing rod (7) is fixedly installed on the connecting shaft (4). The processing scraper (71) is rotatably connected to the end of the processing rod (7). The processing scraper (71) is in contact with the inner side of the grinding cylinder (3). A reciprocating mechanism (9) for material return is provided between the grinding cylinder (3) and the connecting shaft (4).

5. The green foundry sand recycling equipment according to claim 4, characterized in that, The reciprocating mechanism (9) includes a main gear (91), a driven gear (92), a connecting plate (93), a rotating roller (94), and a feeding belt (95). The connecting plate (93) is fixedly installed on the inner wall of the grinding cylinder (3) in a vertical direction. The upper end of the connecting plate (93) extends to the upper end of the grinding cylinder (3). A rotating roller (94) is rotatably connected to each of the upper and lower ends of the connecting plate (93). The rotating rollers (94) are connected to each other through the feeding belt (95). A baffle is fixedly provided on the outer side of the feeding belt (95). The driven gear (92) is coaxially fixedly connected to the lower rotating roller (94). The main gear (91) is coaxially fixedly connected to the connecting shaft (4). The driven gear (92) meshes with the main gear (91).

6. The green foundry sand recycling equipment according to claim 5, characterized in that, The connecting shaft (4) and the processing rod (7) are both telescopic rods with built-in springs. The lower end of the connecting shaft (4) is fixedly connected to a first connecting block (41), the lower end of the first connecting block (41) is fixedly connected to a rotating rod (43), and a second connecting block (42) is provided below the first connecting block (41) and rotatably connected to the rotating rod (43).

7. The green foundry sand recycling equipment according to claim 6, characterized in that, A dust cover (96) is fitted on the outer side of the main gear (91) and the driven gear (92). A dust cover (96) is fitted on the outer side of the first gear (81) and the second gear (82). The upper and lower ends of the dust cover (96) are rotatably connected to the connecting shaft (4).

8. The green foundry sand recycling equipment according to claim 1, characterized in that, The feeding disc (10) is slidably connected to the inner wall of the grinding cylinder (3). The upper end face of the feeding disc (10) is in close contact with the lower end face of the grinding plate (44) which is vertically slidably installed on the side wall of the connecting shaft (4). A spring is connected between the grinding plate (44) and the connecting shaft (4).

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