Casting molding sand crushing and screening device

Abstract

The invention relates to the technical field of molding sand crushing equipment, and particularly discloses a casting molding sand crushing and screening device which comprises a crushing mechanism and a screening mechanism, the screening mechanism is arranged below the crushing mechanism, a conveying mechanism is arranged below the screening mechanism, and the crushing mechanism comprises a first support, a shell, a side plate, a discharging hopper, a crushing knife roll and a grid plate. The screening mechanism comprises a second support, a limiting plate, a connecting rod, a screening basket and a servo telescopic rod, the conveying mechanism comprises a third support and an electric conveying belt, a worker can conveniently observe the operation condition of related parts in the crushing mechanism, so that when a crushing knife roll is blocked or damaged, the worker can respond in time, and the working efficiency is improved. According to the molding sand crushing and screening device, the fault removing efficiency is improved, components in the crushing and screening device are convenient to clean and maintain, crushed molding sand particles can be discharged from the lower portion of the crushing mechanism in time, coherence of molding sand crushing operation is guaranteed, and the molding sand crushing operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molding sand crushing equipment, and in particular discloses a molding sand crushing and screening device for casting. Background Art

[0002] Molding sand for casting is a special material, mainly composed of raw sand, binder, additives and water. It is used to make the outer mold and internal support structure of the casting. The main component of molding sand for casting is silicon dioxide, which makes the molding sand have high refractoriness and strength, and can withstand the thermal effect of high-temperature liquid metal during the casting process. The binder in the molding sand is usually clay, which is used to bond the raw sand particles together to form molding sand with certain plasticity and strength. In the process of casting production, in order to save resources, it is necessary to use a molding sand crushing device to crush and screen the blocky molding sand after the casting is demolded, so that the crushed molding sand can be reused.

[0003] The Chinese patent with the patent number CN213245064U discloses a crushing device for foundry sand, including a crushing box, the upper surface of which is connected to a feed port, the four corners of the lower surface of which are fixedly connected to support legs, the lower surface of which is provided with a collecting box, the top of the left side of which is fixedly connected to a driving motor, and the output end of which is fixedly connected to a first rotating gear. The crushing device for foundry sand drives the first crushing wheel and the second crushing wheel to rotate by the driving motor to perform primary crushing of the sand, which can more effectively crush large particles of sand, improve the crushing effect of the sand, improve the recycling rate of the sand, and improve the convenience of use. The crushing knife is driven by the rotating motor to rotate to perform secondary crushing of the sand, which has a better crushing effect, can fully crush the sand, and greatly improve the crushing quality of the sand. However, during the use of the above-mentioned crushing device, it is not convenient for workers to observe the operation of the relevant components inside the crushing device, resulting in that when the crushing wheel is stuck or damaged, the workers cannot observe the operation of the relevant components inside the crushing device. People are unable to find and eliminate the above-mentioned problems in time, which is not conducive to workers' understanding of the inventory of large-particle molding sand in the mobile screen in the above-mentioned crushing device, affecting the efficiency of molding sand screening. In addition, during the use of the above-mentioned crushing device, when the collection box is full, workers are required to shut down the above-mentioned crushing device, pull out the collection box from the bottom of the above-mentioned crushing device, take out the crushed molding sand particles in the collection box, and then put the collection box back under the above-mentioned crushing device, which increases the workload of workers and affects the continuity of the molding sand crushing operation, thereby affecting the efficiency of the molding sand crushing. Therefore, in order to solve the above-mentioned problems, the present invention proposes a molding sand crushing and screening device for casting. Summary of the invention

[0004] The present invention aims to provide a casting sand crushing and screening device, which is convenient for workers to observe the operation of relevant components inside the crushing mechanism, so that when the crushing knife roller is stuck or damaged, the workers can respond in time, thereby improving the efficiency of troubleshooting and facilitating the cleaning and maintenance of the components in the crushing and screening device. The crushed molding sand particles can be discharged from the bottom of the crushing mechanism in time, ensuring the continuity of the molding sand crushing operation and improving the efficiency of the molding sand crushing operation.

[0005] The present invention is achieved through the following technical solutions: A foundry sand crushing and screening device comprises a crushing mechanism and a screening mechanism, wherein a screening mechanism is arranged below the crushing mechanism, and a conveying mechanism is arranged below the screening mechanism, wherein the crushing mechanism comprises a first bracket, an outer shell, a side plate, a lower hopper, a crushing knife roller and a grid plate, wherein the screening mechanism comprises a second bracket, a limit plate, a connecting rod, a screen basket and a servo telescopic rod, and wherein the conveying mechanism comprises a third bracket and an electric conveyor belt.

[0006] As a further configuration of the above scheme, the upper end of the first bracket is connected to an outer shell, and a feed hopper is arranged above the outer shell to facilitate putting the crushed lump sand into the outer shell. Both sides of the outer shell are detachably connected with side panels, and two transparent observation panels are arranged inside the side panels to facilitate observing the operation of the crushing knife rollers and grid plates inside the outer shell and the side panels, and to facilitate cleaning and maintenance of the crushing knife rollers and grid plates. A lower hopper is detachably connected to the bottom of the outer shell to facilitate discharging the crushed sand into the screening mechanism. Four crushing knife rollers are arranged on the inner side of the outer shell to fully crush the lump sand.

[0007] As a further arrangement of the above scheme, the two ends of the crushing knife roller respectively pass through the two sides of the shell and are rotatably connected to the shell; one end of the crushing knife roller is connected to a motor, so that the motor can be used to drive the crushing knife roller to rotate and crush the block sand; the outside of the motor is connected to a mounting seat, which can provide a stable operation for the motor; a protective cover is provided at the end of the crushing knife roller away from the motor, which can keep the other end of the crushing knife roller clean and tidy, and prevent impurities such as dust and molding sand powder from adhering to the end of the crushing knife roller away from the motor and affecting the smooth rotation of the crushing knife roller; the mounting seat and the protective cover are both detachably connected to the shell, which is convenient for the installation and maintenance of the mounting seat and the protective cover; the inner lower end of the shell is detachably connected to a grid plate, which can break up the crushed molding sand particles before entering the lower hopper, to ensure that the molding sand particles are smoothly discharged from the lower hopper to the crushing mechanism.

[0008] As a further arrangement of the above scheme, a plurality of first universal brake wheels are connected to the bottom of the second bracket to facilitate adjustment of the position and fixation of the screening mechanism; a plurality of first threaded holes are provided on both sides of the bottom of the second bracket to facilitate installation of the first threaded rod; two long holes are provided on both sides of the top of the first bracket; the internal threads of the first threaded holes are connected to the first threaded rod; the lower end of the first threaded rod is connected to a first anti-slip pad; after the position of the screening mechanism is initially fixed by stepping on the brake of the first universal brake wheel, the screening mechanism can be further fixed through the friction between the first anti-slip pad and the ground, so that the screening mechanism remains stable during use; a limit plate is connected to one end of the bottom of the second bracket to limit the position of the conveying mechanism, thereby simplifying the alignment method of the conveying mechanism and the screening mechanism and saving the alignment time of the conveying mechanism and the screening mechanism.

[0009] As a further configuration of the above scheme, the upper part of the second bracket is detachably connected to two connecting rods, and the lower part of the connecting rods is connected to a plurality of toggling rods, which can break up the molding sand particles that fall into the screen basket to avoid the accumulation of molding sand particles in the screen basket, thereby ensuring the quality of screening and improving the efficiency of screening. A screen basket is arranged on the inner side of the upper part of the second bracket, which can concentrate the crushed molding sand on the inner side of the screen basket to ensure the cleanliness of the screening working environment. Discharge ports are provided on both sides of one end of the screen basket to facilitate the discharge of larger particles of molding sand from the screen basket. The inner side of the discharge port is detachably connected to A sealing plate is provided to seal the discharge port during the operation of the screen basket to prevent molding sand particles from falling from the screen basket through the discharge port, thereby reducing the workload of cleaning the molding sand particles. Two supporting shafts are provided on both sides of the screen basket. The supporting shafts pass through the interior of the long holes and are slidably connected to the long holes, thereby providing support for the screen basket while limiting the moving direction of the screen basket to ensure the stability of the operation of the screen basket. Two servo telescopic rods are connected to one end of the screen basket to provide power for the reciprocating motion of the screen basket. The outer side of the servo telescopic rod is connected to the second bracket to facilitate the installation and maintenance of the servo telescopic rod.

[0010] As a further arrangement of the above scheme, a plurality of second universal brake wheels are connected to both sides of the lower part of the third bracket to facilitate adjusting the position of the conveying mechanism; a plurality of second threaded holes are opened on both sides of the lower part of the third bracket; a second threaded rod is connected to the internal thread of the second threaded hole; a second anti-slip pad is connected to the lower end of the second threaded rod, and the conveying mechanism can be further fixed by the friction between the second anti-slip pad and the ground, so that the conveying mechanism remains stable during use and the quality of the conveying of molding sand particles is ensured; an electric conveyor belt is connected to the top of the third bracket to convey the crushed and screened molding sand particles from the bottom of the crushing mechanism and the screening mechanism to ensure the continuity of the molding sand crushing and screening operations and improve the efficiency of the screening under the molding sand crushing; baffles are connected to both sides of the electric conveyor belt to prevent the molding sand from falling from the electric conveyor belt during the conveying process.

[0011] As a further configuration of the above scheme, a controller is provided on one side of the crushing mechanism to facilitate the control of the operation of the motor, servo telescopic rod and electric conveyor belt in the crushing and screening device, thereby ensuring that the crushing and screening device can smoothly perform the crushing and screening functions of the molding sand.

[0012] The foundry sand crushing and screening device, during use, uses a controller to start the motor, so that two adjacent motors located at the same height rotate toward each other, and the two motors reverse, driving the two crushing knife rollers to reverse, and uses the controller to start the servo telescopic rod and the electric conveyor belt, so that the servo telescopic rod regularly retracts and retracts, driving the screen basket to reciprocate on the inner side of the second bracket, and the block sand to be crushed is continuously fed from the feed hopper into the crushing mechanism, and the block sand is initially crushed by the two crushing knife rollers located above and then falls. In the process of falling, the two crushing knife rollers located below further crush the sand to form sand particles, and the crushed sand particles fall to the inner side of the grid plate. , and then fall into the lower hopper after being broken up by the grid plate, and then fall into the screen basket after being discharged from the crushing mechanism through the lower hopper for screening. During the screening process, the toggle rod breaks up the molding sand particles in the screen basket, so that the smaller molding sand particles can smoothly leak from the sieve holes in the screen basket to the electric conveyor belt, and are sent out from the bottom of the crushing mechanism and the screening mechanism. The larger molding sand particles remain in the screen basket. After a period of time, when a sufficient amount of large-diameter molding sand particles have accumulated in the screen basket, turn off the motor and the servo telescopic rod, remove the sealing plate from the discharge port, and after the large-diameter molding sand particles in the screen basket are cleaned out of the screen basket through the discharge port, the sealing plate is reset, and then the motor and the servo telescopic rod are started to continue the crushing and screening operations of the molding sand.

[0013] The present invention has the following beneficial effects in practical application: 1. The split design of the crushing mechanism, screening mechanism and conveying mechanism in the device facilitates the assembly and maintenance of the above three mechanisms, so that the above three mechanisms can be combined to form a complete molding sand crushing and screening device, and can also be used independently as needed, thereby improving the utilization rate of the above three mechanisms and saving resources.

[0014] 2. The combination of the upper and lower groups of two crushing knife rollers and the motor in the crushing mechanism can fully crush the lump sand to ensure the quality of the sand crushing. The use of the grid plate can break up the crushed sand particles before entering the lower hopper to ensure that the sand particles are smoothly discharged from the lower hopper to the crushing mechanism. The use of the transparent observation plate is convenient for workers to observe the operation of the crushing knife rollers and grid plates in the crushing mechanism, so that when the crushing knife rollers and grid plates are damaged, the crushing mechanism can be shut down in time and respond. The detachable connection between the two side panels and the outer shell is convenient for cleaning and maintenance of the internal components of the crushing mechanism.

[0015] 3. The combination of the first universal brake wheel and the first threaded rod in the screening mechanism facilitates the adjustment and fixing of the position of the screening mechanism, so that the screening mechanism can be used independently as a daily screening device, so that the screening mechanism remains stable during use. The use of the limit plate helps to limit the position of the conveying mechanism and simplify the alignment method of the conveying mechanism and the screening mechanism. The combination of two connecting rods and multiple toggle rods can break up the molding sand particles inside the screen basket during the reciprocating motion of the screen basket, thereby improving the efficiency of molding sand screening. The combination of two discharge ports and a sealing plate facilitates the discharge of larger particles of molding sand from the screen basket. The discharge port can be sealed during the operation of the screen basket to prevent molding sand particles from falling from the screen basket through the discharge port, thereby reducing the workload of cleaning the molding sand particles.

[0016] 4. The combination of the second universal brake wheel and the second threaded rod in the conveying mechanism facilitates the adjustment and fixing of the position of the conveying mechanism, so that the conveying mechanism can be used independently as a daily article conveying mechanism, thereby improving the utilization rate of the conveying mechanism. The combination of the electric conveyor belt and the baffle can continuously deliver the crushed molding sand from under the crushing mechanism and the screening mechanism, thereby ensuring the continuity of the operation of the crushing and screening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 is a first perspective view of the present invention; Figure 2 is a second perspective view of the present invention; Figure 3 It is a third perspective view of the present invention; Figure 4 It is a first combined perspective view of the pulverizing mechanism and the controller in the present invention; Figure 5 A second combined perspective view of the pulverizing mechanism and the controller of the present invention; Figure 6 is a perspective view of the screening mechanism of the present invention; Figure 7 It is a perspective view of the conveying mechanism in the present invention.

[0019] In the figure: 1, crushing mechanism; 2, screening mechanism; 3, conveying mechanism; 4, controller; 11, first bracket; 12, housing; 121, feed hopper; 13, side plate; 131, transparent observation plate; 14, lower hopper; 15, crushing knife roller; 16, motor; 161, mounting seat; 17, protective cover; 18, grid plate; 21, second bracket; 211, first universal brake wheel; 212, first threaded hole; 213, long Strip hole; 22, first threaded rod; 221, first anti-skid pad; 23, limit plate; 24, connecting rod; 241, toggle rod; 25, screen basket; 251, discharge port; 252, support shaft; 253, sealing plate; 26, servo telescopic rod; 31, third bracket; 311, second universal brake wheel; 312, second threaded hole; 32, second threaded rod; 321, second anti-skid pad; 33, electric conveyor belt; 34, baffle. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 7 , and describes the application in detail with reference to embodiments.

[0022] The embodiment discloses a molding sand crushing and screening device for casting, comprising a crushing mechanism 1 and a screening mechanism 2, wherein the screening mechanism 2 is arranged below the crushing mechanism 1, and a conveying mechanism 3 is arranged below the screening mechanism 2, the crushing mechanism 1 comprises a first bracket 11, an outer shell 12, a side plate 13, a lower hopper 14, a crushing knife roller 15 and a grid plate 18, the screening mechanism 2 comprises a second bracket 21, a limit plate 23, a connecting rod 24, a screen basket 25 and a servo telescopic rod 26, and the conveying mechanism 3 comprises a third bracket 31 and an electric conveyor belt 33.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the upper end of the first bracket 11 is connected to the shell 12, and a feed hopper 121 is arranged above the shell 12 to facilitate the placement of crushed lump sand into the shell 12. Both sides of the shell 12 are detachably connected with side panels 13, and two transparent observation panels 131 are arranged inside the side panels 13 to facilitate observation of the operation of the crushing roller 15 and the grid plate 18 inside the shell 12 and the side panels 13, and to facilitate cleaning and maintenance of the crushing roller 15 and the grid plate 18. The lower part of the shell 12 is detachably connected with a lower hopper 14 to facilitate the discharge of the crushed sand into the screening mechanism 2. Four crushing rollers 15 are arranged on the inner side of the shell 12 to fully crush the lump sand.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the two ends of the crushing knife roller 15 respectively pass through the two sides of the shell 12 and are rotatably connected to the shell 12, one end of the crushing knife roller 15 is connected to a motor 16, so that the motor 16 can be used to drive the crushing knife roller 15 to rotate and crush the block sand, the outer side of the motor 16 is connected to a mounting seat 161, which can provide a stable operation for the motor 16, and the end of the crushing knife roller 15 away from the motor 16 is provided with a protective cover 17, which can keep the other end of the crushing knife roller clean and tidy, and prevent dust and impurities such as molding sand powder from adhering to the end of the crushing knife roller away from the motor 16 to affect the smooth rotation of the crushing knife roller, the mounting seat 161 and the protective cover 17 are both detachably connected to the shell 12, which is convenient for the installation and maintenance of the mounting seat 161 and the protective cover 17, and the inner lower end of the shell 12 is detachably connected with a grid plate 18, which can break up the crushed molding sand particles before entering the lower hopper 14, so as to ensure that the molding sand particles are smoothly discharged from the lower hopper 14 to the crushing mechanism 1.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, a plurality of first universal brake wheels 211 are connected to the bottom of the second bracket 21 to facilitate adjustment of the position and fixation of the screening mechanism 2, a plurality of first threaded holes 212 are provided on both sides of the bottom of the second bracket 21 to facilitate installation of the first threaded rod 22, two long strip holes 213 are provided on both sides of the top of the first bracket 11, the first threaded holes 212 are internally threadedly connected to the first threaded rod 22, the lower end of the first threaded rod 22 is connected to a first anti-skid pad 221, after the first universal brake wheel 211 is braked to initially fix the position of the screening mechanism 2, the screening mechanism 2 can be further fixed by the friction between the first anti-skid pad 221 and the ground, so that the screening mechanism 2 remains stable during use, and a limiting plate 23 is connected to one end of the bottom of the second bracket 21 to limit the position of the conveying mechanism 3, simplify the alignment method of the conveying mechanism 3 and the screening mechanism 2, and save the alignment time of the conveying mechanism 3 and the screening mechanism 2.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the upper part of the second bracket 21 is detachably connected to two connecting rods 24, and the lower part of the connecting rods 24 is connected to a plurality of toggling rods 241, which can break up the molding sand particles falling into the sieve basket 25 to prevent the molding sand particles from accumulating in the sieve basket 25, thereby ensuring the quality of screening and improving the efficiency of screening. A sieve basket 25 is arranged on the inner side of the upper part of the second bracket 21, which can concentrate the crushed molding sand on the inner side of the sieve basket 25 to ensure the cleanliness of the screening working environment. Discharge ports 251 are arranged on both sides of one end of the sieve basket 25 to facilitate the discharge of larger particles of molding sand from the sieve basket 25. A sealing plate 253 is detachably connected to the inner side of the discharge port 251, which can be used in the sieve basket 2 During the operation, the discharge port 251 is sealed to prevent the molding sand particles from falling from the sieve basket 25 through the discharge port 251, thereby reducing the workload of cleaning the molding sand particles. Two support shafts 252 are arranged on both sides of the sieve basket 25. The support shafts 252 penetrate the interior of the long holes 213 and are slidably connected to the long holes 213, which can provide support for the sieve basket 25 while limiting the moving direction of the sieve basket 25, thereby ensuring the stable operation of the sieve basket 25. Two servo telescopic rods 26 are connected to one end of the sieve basket 25 to provide power for the reciprocating motion of the sieve basket 25. The outer side of the servo telescopic rod 26 is connected to the second bracket 21, which is convenient for the installation and maintenance of the servo telescopic rod 26.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, a plurality of second universal brake wheels 311 are connected to both sides of the lower part of the third bracket 31, which are convenient for adjusting the position of the conveying mechanism 3; a plurality of second threaded holes 312 are opened on both sides of the lower part of the third bracket 31; the second threaded holes 312 are internally threadedly connected to the second threaded rod 32; the lower end of the second threaded rod 32 is connected to the second anti-skid pad 321, which can further fix the conveying mechanism 3 through the friction between the second anti-skid pad 321 and the ground, so that the conveying mechanism 3 remains stable during use and the quality of the conveying of the molding sand particles is ensured; an electric conveyor belt 33 is connected to the top of the third bracket 31, which can convey the crushed and screened molding sand particles from the bottom of the crushing mechanism 1 and the screening mechanism 2 to ensure the continuity of the molding sand crushing and screening operations and improve the efficiency of the screening under the molding sand crushing; baffles 34 are connected to both sides of the electric conveyor belt 33 to prevent the molding sand from falling from the electric conveyor belt 33 during the conveying process.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a controller 4 is provided on one side of the crushing mechanism 1 to facilitate the control of the operation of the motor 16, the servo telescopic rod 26 and the electric conveyor belt 33 in the crushing and screening device, so as to ensure that the crushing and screening device can smoothly perform the crushing and screening functions of the molding sand.

[0029] The foundry sand crushing and screening device disclosed in the present embodiment, during use, uses the controller 4 to simultaneously start the four motors 16, so that the two adjacent motors 16 located at the same height rotate toward the side close to each other, and the two motors 16 are reversed to drive the two crushing knife rollers 15 to rotate toward the side close to each other, and the controller 4 is used to start the servo telescopic rod 26 and the electric conveyor belt 33, so that the servo telescopic rod 26 is regularly extended and retracted, and the screen basket 25 is driven to reciprocate on the inner side of the second bracket 21, and the block sand to be crushed is continuously fed from the feed hopper 121 into the crushing mechanism 1. The block sand is initially crushed by the two crushing knife rollers 15 located above during the falling process and then continues to fall. The two crushing knife rollers 15 located below further crush the sand to form sand particles. The crushed sand particles fall to the inner side of the grid plate 18, collide with the grid bars inside the grid plate 18, are broken up by the grid bars, and then fall into the lower hopper 14, and are discharged through the lower hopper 14. The sand particles are sieved in the sieve basket 25. During the reciprocating motion of the sieve basket 25 to sieve the sand particles, the sand particles collide with the toggle rod 241, so that the toggle rod 241 breaks up the sand particles in the sieve basket 25, so that the sand particles with small diameters can smoothly flow through the sieve holes in the sieve basket 25 onto the electric conveyor belt 33. Under the operation of the electric conveyor belt 33, the sand particles with small diameters are sent out from below the crushing mechanism 1 and the screening mechanism 2, and the larger sand particles remain in the sieve basket 25. After a while, observe the large-diameter molding sand particles in the screen basket 25. When a sufficient amount of large-diameter molding sand particles have accumulated in the screen basket 25, use the controller 4 to turn off the motor 16 and the servo telescopic rod 26, remove the sealing plate 253 from the discharge port 251, and after the large-diameter molding sand particles in the screen basket 25 are cleaned out of the screen basket 25 through the discharge port 251, reset the sealing plate 253, and then use the controller 4 to start the motor 16 and the servo telescopic rod 26 again to continue the crushing and screening operations of the molding sand.

[0030] During the crushing and screening process, the operation of the crushing roller 15 and the grid plate 18 in the crushing mechanism can be observed in real time through the transparent observation plate 131. When the crushing roller 15 and the grid plate 18 are stuck or damaged, the controller 4 is used in time to shut down the motor 16, the servo telescopic rod 26 and the electric conveyor belt 33, and the two side plates 13 are removed from both sides of the shell 12 to inspect the crushing roller 15 and the grid plate 18. After the problem is solved, the connection between the side plate 13 and the shell 12 is restored, and the sand crushing and screening operation can be continued.

[0031] Since the driving mechanisms of the servo telescopic rod 26 and the electric conveyor belt 33 are conventional technologies in the field, the schematic diagram here is only for indicating the installation positions of the telescopic rod 267 and the electric conveyor belt 33, and therefore, the driving mechanisms of the above components are not drawn in the figure.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the invention should be included in the protection scope of the present invention.

Claims

1. A foundry sand crushing and screening device, comprising a crushing mechanism and a screening mechanism, characterized in that: A screening mechanism is arranged below the crushing mechanism, and a conveying mechanism is arranged below the screening mechanism. The crushing mechanism includes a first bracket, an outer shell, a side plate, a lower hopper, a crushing knife roller and a grid plate. The screening mechanism includes a second bracket, a limit plate, a connecting rod, a screen basket and a servo telescopic rod. The conveying mechanism includes a third bracket and an electric conveyor belt.

2. A foundry sand crushing and screening device according to claim 1, characterized in that: The upper end of the first bracket is connected to a shell, a feed hopper is arranged above the shell, side panels are detachably connected to both sides of the shell, two transparent observation panels are arranged inside the side panels, a lower hopper is detachably connected to the bottom of the shell, and four crushing knife rollers are arranged on the inner side of the shell.

3. A foundry sand crushing and screening device according to claim 2, characterized in that: The two ends of the crushing knife roller respectively pass through the two sides of the outer shell and are rotatably connected to the outer shell, one end of the crushing knife roller is connected to a motor, the outer side of the motor is connected to a mounting seat, and the end of the crushing knife roller away from the motor is provided with a protective cover, the mounting seat and the protective cover are both detachably connected to the outer shell, and the inner lower end of the outer shell is detachably connected to a grid plate.

4. The foundry sand crushing and screening device according to claim 1, characterized in that: A plurality of first universal brake wheels are connected to the lower part of the second bracket, a plurality of first threaded holes are provided on both sides of the lower part of the second bracket, two long holes are provided on both sides of the upper part of the first bracket, the internal threads of the first threaded holes are connected to the first threaded rod, the lower end of the first threaded rod is connected to the first anti-slip pad, and the lower end of the second bracket is connected to a limiting plate.

5. A casting sand crushing and screening device according to claim 4, characterized in that: Two connecting rods are detachably connected to the upper part of the second bracket, and a plurality of toggle rods are connected to the lower part of the connecting rods. A screen basket is arranged on the inner side of the upper part of the second bracket, and discharge ports are provided on both sides of one end of the screen basket, and a sealing plate is detachably connected to the inner side of the discharge port. Two supporting shafts are arranged on both sides of the screen basket, and the supporting shafts pass through the interior of the long hole and are slidably connected to the long hole. Two servo telescopic rods are connected to one end of the screen basket, and the outer side of the servo telescopic rod is connected to the second bracket.

6. The foundry sand crushing and screening device according to claim 1, characterized in that: A plurality of second universal brake wheels are connected to both sides of the lower part of the third bracket, a plurality of second threaded holes are opened on both sides of the lower part of the third bracket, the internal threads of the second threaded holes are connected to second threaded rods, the lower ends of the second threaded rods are connected to second anti-slip pads, an electric conveyor belt is connected to the top of the third bracket, and baffles are connected to both sides of the electric conveyor belt.

7. The foundry sand crushing and screening device according to claim 1, characterized in that: A controller is arranged on one side of the pulverizing mechanism.

Images