A sand mixing device for processing cast grinding balls

Abstract

The invention relates to a sand mixing device for casting grinding ball processing in the field of industrial processing technology, comprising a sand mixing frame, the inner wall of the sand mixing frame is rotatably connected with a rotating rod, and the two ends of the rotating rod extend through and extend to the outside of the sand mixing frame, the surface of the rotating rod is surrounded by a mixing and stirring plate arranged at equal intervals, the surface of the mixing and stirring plate is installed with a follower plug rod arranged in an array, the surface of the follower plug rod is sleeved with an air jacket layer and a movable sleeve ring, and the top of the movable sleeve ring is connected to the bottom end of the air jacket layer, the top wall of the follower plug rod is inlaid with a top wall electromagnetic block, the inside of the follower plug rod is slidably connected with a driving magnetic block, and there is a magnetic attraction between the driving magnetic block and the movable sleeve ring. During the sand mixing process, when encountering agglomeration, the invention can make the air jacket layer inside the agglomeration expand to have an effect of outward cracking of the agglomeration, and at the same time, the air jacket layers on the upper and lower sides of the agglomeration will have an extrusion effect on the agglomeration sandwiched in the middle when expanding, so as to effectively improve the cracking quality of the agglomerates in the adhesion state.

Description

Technical Field

[0001] The invention relates to a sand mixing device for processing cast grinding balls, in particular to a sand mixing device for processing cast grinding balls applied in the technical field of industrial processing. Background Art

[0002] When processing casting grinding balls, a sand mixer is needed to evenly mix the components in the molding sand and effectively coat the surface of the sand particles with the relevant binders. It is the main equipment for mixing molding sand in foundry sand processing. The existing sand mixers are mainly used for stirring and mixing. The molding sand and other materials are mixed relatively evenly, but a sticky state will be formed, resulting in some molding sand being unusable.

[0003] In order to solve the adhesion problem that occurs during the stirring and mixing process, a certain sand mixer on the market adopts a design that separates stirring and crushing, and has a certain market share.

[0004] The specification of Chinese invention patent CN115647286B discloses a casting sand mixer, including: a sand mixer having a sand mixing chamber, a feed port and a discharge port, both of which are connected to the sand mixing chamber; a stirring device is arranged in the sand mixer, and the stirring device is used to stir the molding sand; a telescopic member is arranged on the sand mixer, and is located above the sand mixing chamber; a lifting plate is arranged on the telescopic member, and after the telescopic member drives the lifting plate to descend, the lifting plate is located in the sand mixing chamber; there are several crushing members, and the crushing members are all arranged on the side of the lifting plate close to the sand mixing chamber, and the crushing members include a support rod and a crushing needle, one end of the support rod is arranged on the lifting plate, and the other end of the crushing needle is arranged on the support rod. Through the above technical scheme, the problem of poor effect of sand mixing in the prior art sand mixer is solved.

[0005] However, when the above-mentioned sand mixer is working, the crushing work performed by the crushing rod is relatively simple. When the adhered agglomerates have a certain thickness, the crushing rod can only achieve a cutting-type crushing process in the vertical direction, but the cracking effect in the horizontal direction cannot be achieved, which leads to certain limitations in the cracking effect. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to comprehensively improve the cracking effect of the sticky agglomerates during the sand mixing process.

[0007] In order to solve the above problems, the present invention provides a sand mixing device for casting grinding ball processing, comprising a sand mixing frame, the inner wall of the sand mixing frame is rotatably connected with a rotating rod, and the two ends of the rotating rod extend through and extend to the outside of the sand mixing frame, the surface of the rotating rod is surrounded by equidistantly arranged mixing and stirring plates, the surface of the mixing and stirring plates is installed with an array-arranged follower plug rod, the surface of the follower plug rod is sleeved with an air jacket layer and a movable sleeve ring, and the top of the movable sleeve ring is connected to the bottom of the air jacket layer, the top wall of the follower plug rod is inlaid with a top wall electromagnetic block, the interior of the follower plug rod is slidably connected with a driving magnetic block, and there is a magnetic attraction between the driving magnetic block and the movable sleeve ring, a driving motor is installed below the sand mixing frame, a conveying box is installed on one side of the driving motor, and a conveyor belt is installed inside the conveying box, and the driving motor is transmission-connected to one end of the rotating rod through the conveyor belt.

[0008] In the above-mentioned sand mixing device for processing cast grinding balls, when agglomeration occurs during the sand mixing process, the mixing and stirring plate, rotating rod, follower rod, air jacket layer, driving magnetic block, top wall electromagnetic block and movable ring are coordinated to expand the air jacket layer inside the agglomerate to achieve the effect of outward cracking of the agglomerate. At the same time, the air jacket layers on the upper and lower sides of the agglomerate will have a squeezing effect on the agglomerate sandwiched in the middle when expanding, thereby effectively improving the cracking quality of the agglomerates in the adhesion state.

[0009] As a further improvement of the present application, the top of the air sleeve layer is fixedly connected to a position on the surface of the follower rod near the top, and the remaining part of the air sleeve layer is in sliding contact with the surface of the follower rod, the inner surface of the movable ring is in fit contact with the surface of the follower rod, and the air sleeve layer is made of wear-resistant elastic material.

[0010] As a further improvement of the present application, the upper part of the sand mixing frame is a rectangular frame and the lower part is a semi-cylindrical design, and there is a gap between the tail end of the mixing plate and the inner wall of the semi-cylindrical lower part of the sand mixing frame.

[0011] As a further improvement of the present application, a discharge hopper is installed through the bottom of the sand mixing frame, a feeding motor is installed on the surface of the discharge hopper, a discharge pipe of a built-in auger is connected through the other surface of the discharge hopper, and the output end of the feeding motor is connected to the end of the auger, and the driving motor is located on one side of the feeding motor.

[0012] As a further improvement of the present application, a feed screen is installed on the inner wall of the sand mixing frame, and the vertical distance between the feed screen and the rotating rod is greater than the length of the follower plug rod.

[0013] As a further improvement of the present application, a scraper is connected to the tail end of the mixing plate, and the scraper is in close contact with the inner wall of the sand mixing frame, and the length of the scraper is the same as the inner cross-sectional length of the sand mixing frame.

[0014] As another improvement of the present application, the top of the follower rod is equipped with a pointed cone top with an annular hollow interior, and a spiral spring located in the annular hollow interior is installed inside the pointed cone top. The movable end of the spiral spring is connected to a spring metal rope that passes through the bottom of the pointed cone top, and an electromagnetic ring is installed on the top of the movable ring, and the tail end of the spring metal rope is adsorbed and connected to the surface of the movable ring.

[0015] As another improvement supplement of the present application, the tail end diameter of the pointed cone top is larger than the diameter of the follower rod, and the surface of the spring metal rope is coated with a corrosion-resistant coating, and the diameter value of the spring metal rope in the initial state is larger than the radius difference between the pointed cone top and the follower rod.

[0016] As another improvement supplement of the present application, the electromagnetic ring is electrically connected to the top wall electromagnetic block, a metal shielding ring is installed at the bottom of the electromagnetic ring, and the horizontal axis of the bottom of the metal shielding ring coincides with the horizontal axis of the top of the driving magnetic block.

[0017] To summarize, the present invention is equipped with a mixing and stirring plate, a rotating rod, a follower rod, an air jacket layer, a driving magnetic block, a top wall electromagnetic block and a movable ring. During the sand mixing process, when agglomeration occurs, the agglomerates mixed in the molding sand will be plugged into the surface of the follower rod, and the top wall electromagnetic block will be started to drive the driving magnetic block and the movable ring to move upward, so that the air jacket layer will undergo stacking expansion and deformation. During this process, the expansion of the air jacket layer on the inner side of the agglomerate has the effect of outward cracking of the agglomerate. At the same time, the air jacket layers on the upper and lower sides of the agglomerate will have a squeezing effect on the agglomerate sandwiched in the middle when expanding, thereby having a double cracking and crushing effect on the agglomerate, effectively improving the cracking quality of the agglomerates in the adhesion state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the sand mixing frame of the first and second embodiments of the present application;

[0019] Figure 2 This is a schematic diagram of the installation of the sand mixing frame and the discharge pipe of the first and second embodiments of the present application;

[0020] Figure 3 This is a diagram of the installation structure of the mixing and stirring plate, the rotating rod and the follower rod of the first and second embodiments of the present application;

[0021] Figure 4 This is a schematic diagram of the installation of the follower rod, the air jacket layer, the driving magnetic block, the top wall electromagnetic block and the moving collar of the first embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the working state of the air jacket layer in the first embodiment of the present application;

[0023] Figure 6This is a schematic diagram of the installation of the pointed cone top and the follower rod of the second embodiment of the present application;

[0024] Figure 7 For the second implementation of this application Figure 6 A is an enlarged schematic diagram;

[0025] Figure 8 This is a schematic diagram of the installation of a spiral spring and a spring metal rope according to the second embodiment of the present application;

[0026] Fig. 9 This is a state diagram of the spring metal rope retracting and breaking in the second embodiment of the present application.

[0027] Description of the numbers in the figure:

[0028] 1. Sand mixing frame; 2. Feeding motor; 3. Driving motor; 4. Conveying box; 5. Discharging hopper; 6. Discharging pipe; 7. Feeding screen; 8. Mixing stirring plate; 9. Rotating rod; 81. Follow-up plug rod; 82. Air jacket layer; 83. Driving magnetic block; 84. Top wall electromagnetic block; 85. Moving sleeve ring; 86. Cone top; 87. Spring metal rope; 88. Vortex spring. DETAILED DESCRIPTION

[0029] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-Figure 5 The invention discloses a sand mixing device for processing cast grinding balls, comprising a sand mixing frame 1, the inner wall of the sand mixing frame 1 is rotatably connected with a rotating rod 9, and the two ends of the rotating rod 9 extend through and extend to the outside of the sand mixing frame 1, the surface of the rotating rod 9 is surrounded by equidistantly arranged mixing and stirring plates 8, the surface of the mixing and stirring plates 8 is installed with an array-arranged follower plug rod 81, the surface of the follower plug rod 81 is sleeved with an air jacket layer 82 and a movable sleeve ring 85, and the top of the movable sleeve ring 85 is connected to the bottom end of the air jacket layer 82, the top wall of the follower plug rod 81 is inlaid with a top wall electromagnetic block 84, the inside of the follower plug rod 81 is slidably connected with a driving magnetic block 83, and there is a magnetic attraction between the driving magnetic block 83 and the movable sleeve ring 85, a driving motor 3 is installed below the sand mixing frame 1, a conveying box 4 is installed on one side of the driving motor 3, and a conveyor belt is installed inside the conveying box 4, and the driving motor 3 is transmission-connected to one end of the rotating rod 9 through the conveyor belt.

[0032] The top of the air jacket layer 82 is fixedly connected to a position on the surface of the follower rod 81 near the top, and the remaining part of the air jacket layer 82 is in sliding contact with the surface of the follower rod 81. The inner surface of the movable ring 85 is in contact with the surface of the follower rod 81. The air jacket layer 82 is made of wear-resistant elastic material.

[0033] Specifically, there are two working states between the top wall electromagnetic block 84 and the driving magnetic block 83, one is mutual attraction and the other is mutual repulsion;

[0034] The rotating rod 9 drives the mixing and stirring plate 8 to mix and stir the materials in the sand mixing frame 1. During the sand mixing process, when agglomeration occurs, the agglomerates mixed in the molding sand will be plugged into the surface of the follower plug 81 to form a serial design. Thereafter, the top wall electromagnetic block 84 is started to drive the driving magnetic block 83 to move upward. At this time, with the help of the adsorption effect between the moving ring 85 and the driving magnetic block 83 made of magnetic material, the moving ring 85 moves upward synchronously with the driving magnetic block 83 (because the top of the moving ring 85 is covered with a metal shielding layer, the magnetic interference effect of the top wall electromagnetic block 84 on the moving ring 85 can be isolated). Then, the air jacket layer 82 originally vertically attached to the surface of the follower plug rod 81 is lifted, so that the air jacket layer 82 is stacked, expanded and deformed. In this process, the air jacket layer 82 on the inner side of the cluster is constrained by the cluster and its expansion and deformation degree is smaller than that of other parts, so a wavy stacked fold shape can be formed. The expansion of the air jacket layer 82 on the inner side of the cluster has an effect of outward cracking of the cluster. At the same time, the air jacket layers 82 on the upper and lower sides of the cluster will squeeze the cluster sandwiched in the middle when expanding, thereby having a double cracking and crushing effect on the cluster, effectively improving the cracking quality of the cluster in the adhesion state.

[0035] Afterwards, the top wall electromagnetic block 84 switches its working state, so that the driving magnetic block 83 drives the movable ring 85 to move downward, and at the same time stretches the air jacket layer 82, so that the air jacket layer 82 returns to a flat state, so as to continue the plug-in, agglomeration and cracking operations.

[0036] The upper part of the sand mixing frame 1 is a rectangular frame and the lower part is a semi-cylindrical design, and there is a gap between the tail end of the mixing and stirring plate 8 and the semi-cylindrical inner wall of the lower part of the sand mixing frame 1. The tail end of the mixing and stirring plate 8 is connected to a scraper, and the scraper is in close contact with the inner wall of the sand mixing frame 1. The length of the scraper is the same as the internal cross-sectional length of the sand mixing frame 1.

[0037] Specifically, the design of the scraper facilitates it to scrape off part of the inner wall of the sand mixing frame 1 as it rotates with the mixing and stirring plate 8, thereby reducing the workload of subsequent cleaning of the inner wall of the sand mixing frame 1.

[0038] A discharge hopper 5 is installed through the bottom of the sand mixing frame 1, and a feeding motor 2 is installed on the surface of the discharge hopper 5. A discharge pipe 6 with a built-in auger is connected to the other surface of the discharge hopper 5, and the output end of the feeding motor 2 is connected to the end of the auger. The driving motor 3 is located on one side of the feeding motor 2.

[0039] Specifically, after the sand mixing is completed, the feeding motor 2 is started, and the molding sand transferred to the discharge hopper 5 can be transferred out of the sand mixing frame 1 through the discharge pipe 6 by the auger.

[0040] A feed screen 7 is installed on the inner wall of the sand mixing frame 1 , and the vertical distance between the feed screen 7 and the rotating rod 9 is greater than the length of the follower rod 81 .

[0041] Specifically, the feed screen 7 is used to assist in feed screening so as to intercept dry lumps in the mixture, and the design of the installation position of the feed screen 7 can avoid interference with the screening work of the feed screen 7 when the mixing and stirring plate 8 rotates.

[0042] Second implementation method:

[0043] Figure 6-Figure 9 It is shown that the top of the follower rod 81 is equipped with a pointed cone top 86 with an annular hollow interior, and the inside of the pointed cone top 86 is equipped with a spiral spring 88 located in the annular hollow. The movable end of the spiral spring 88 is connected to a spring metal rope 87 that passes through the bottom of the pointed cone top 86. An electromagnetic ring is installed on the top of the movable ring 85, and the tail end of the spring metal rope 87 is adsorbed and connected to the surface of the movable ring 85.

[0044] The diameter of the tail end of the pointed cone top 86 is larger than the diameter of the follower rod 81 , and the surface of the spring metal rope 87 is coated with a corrosion-resistant coating. The diameter value of the spring metal rope 87 in the initial state is larger than the radius difference between the pointed cone top 86 and the follower rod 81 .

[0045] The electromagnetic ring is electrically connected to the top wall electromagnetic block 84 , a metal shielding ring is installed at the bottom of the electromagnetic ring, and the horizontal axis of the bottom of the metal shielding ring coincides with the horizontal axis of the top of the driving magnetic block 83 .

[0046] Specifically, in this embodiment, the top wall electromagnetic block 84 and the driving magnetic block 83 have only one working state, that is, the attraction state, and the top wall electromagnetic block 84 and the electromagnetic ring are in an open and closed state, that is, the two are not in a state of being opened at the same time;

[0047] When performing the cracking and crushing operation of inserting the agglomerate on the surface of the follower plug rod 81, the design of the pointed cone top 86 can be used to make it more smoothly inserted and transferred to the surface of the follower plug rod 81 (because the bottom diameter of the pointed cone top 86 is larger than the diameter of the follower plug rod 81, after the insertion process of the pointed cone top 86, the diameter of the hole in the agglomerate is larger than the follower plug rod 81 in a non-tightly fitting and adhering state, which is convenient for keeping the surface of the follower plug rod 81 free of residue later);

[0048] During the process of plugging into a string, the electromagnetic ring is in the start state, and the top wall electromagnetic block 84 is in the close state. At this time, the movable ring 85 attracts and pulls the tail end of the spring metal rope 87 so that it falls as far as possible within the projection range of the pointed cone top 86 in the vertical direction;

[0049] Start the top wall electromagnetic block 84 and close the electromagnetic ring. At this time, the spring metal rope 87 moves upward autonomously under the action of its elastic potential energy. At the same time, due to the loss of restraint, the spiral spring 88 drives the spring metal rope 87 to rotate, so the spring metal rope 87 is in a state of rotational retraction, which is equivalent to rotational cracking in the cluster (because the diameter of the spring metal rope 87 after it is out of the stretched state and restored to the initial state is larger than the radius difference between the pointed cone top 86 and the follower plug rod 81, it can effectively crack the cluster that is swaying in series on the surface of the follower plug rod 81 and has a diameter larger than the follower plug rod 81). At the same time, the magnetic block 83 is driven to move upward, driving the movable ring 85 to gradually approach the tail end of the spring metal rope 87 until it contacts and starts the electromagnetic ring again, closing the top wall electromagnetic block 84, driving the magnetic block 83 to fall autonomously to the surface of the mixing plate 8 under the action of gravity, and driving the spring metal rope 87 to stretch again.

[0050] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A sand mixing device for processing cast grinding balls, comprising a sand mixing frame (1), characterized in that: The inner wall of the sand mixing frame (1) is rotatably connected to a rotating rod (9), and both ends of the rotating rod (9) extend through the outer side of the sand mixing frame (1). The surface of the rotating rod (9) is surrounded by equidistantly arranged mixing plates (8), and the surface of the mixing plates (8) is equipped with array-arranged follower plug rods (81). The surface of the follower plug rods (81) is sleeved with an air jacket layer (82) and a movable sleeve ring (85), and the top end of the movable sleeve ring (85) is connected to the bottom end of the air jacket layer (82). A top wall electromagnetic block (84) is embedded and installed on the top wall of the moving plug rod (81); a driving magnetic block (83) is slidably connected inside the follower plug rod (81); and there is a magnetic attraction between the driving magnetic block (83) and the moving ring (85); a driving motor (3) is installed below the sand mixing frame (1); a conveying box (4) is installed on one side of the driving motor (3); and a conveyor belt is installed inside the conveying box (4); and the driving motor (3) is transmission-connected to one end of the rotating rod (9) via the conveyor belt.

2. The sand mixing device for casting grinding balls according to claim 1, characterized in that: The top end of the air jacket layer (82) is fixedly connected to a position on the surface of the follower rod (81) near the top end, and the remaining part of the air jacket layer (82) is in sliding contact with the surface of the follower rod (81), and the inner surface of the movable ring (85) is in contact with the surface of the follower rod (81), and the air jacket layer (82) is made of a wear-resistant elastic material.

3. The sand mixing device for casting grinding balls according to claim 1, characterized in that: The upper part of the sand mixing frame (1) is a rectangular frame and the lower part is a semi-cylindrical design, and there is a gap between the tail end of the mixing and stirring plate (8) and the inner wall of the semi-cylindrical lower part of the sand mixing frame (1).

4. The sand mixing device for casting grinding balls according to claim 1, characterized in that: A discharge hopper (5) is installed through the bottom of the sand mixing frame (1), a feeding motor (2) is installed on the surface of the discharge hopper (5), a discharge pipe (6) with a built-in auger is connected through the other surface of the discharge hopper (5), and the output end of the feeding motor (2) is connected to the end of the auger, and the driving motor (3) is located on one side of the feeding motor (2).

5. The sand mixing device for casting grinding balls according to claim 1, characterized in that: A feed screen (7) is installed on the inner wall of the sand mixing frame (1), and the vertical distance between the feed screen (7) and the rotating rod (9) is greater than the length of the follower plug rod (81).

6. The sand mixing device for casting grinding balls according to claim 3, characterized in that: The rear end of the mixing and stirring plate (8) is connected to a scraper, and the scraper is in close contact with the inner wall of the sand mixing frame (1), and the length of the scraper is the same as the length of the inner cross section of the sand mixing frame (1).

Images