A molding sand recycling device

Abstract

The utility model discloses a casting type sand recovery device, with set up in the sand pit of ground below, the sand pit bottom surface is set into automatic slide sand structure, and the upper mouth portion of sand pit is provided with a circle of support step, and a layer of sand screen is equipped with on the support step top, and the area of sand screen is in harmony with the upper port of sand pit, and a plurality of vibration exciters are evenly spaced and arranged on the support step, and each vibration exciter is vertically arranged, and the vibration exciter is connected with the bottom surface edge of sand screen and forms vibration transmission, and a plurality of supporting springs are further arranged between the support step and the bottom surface of sand screen, the utility model discloses through the vibration exciter of sand screen design and carries out vibration treatment, so that the sand on the sand screen can be directly cleaned through the vibration mode, and the staff does not need to operate and clean additionally, and the manpower and material resources are saved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for casting large pipe fittings, and in particular to a casting sand recovery device. Background Technology

[0002] In the production of large cast iron pipes, these cast iron pipe workpieces are generally quite large, with some pipes having a diameter of 1.5m to 2.5m. Therefore, their production must be carried out by casting in large sand boxes to achieve the final shape. Due to the huge size of the castings, the sand boxes are usually filled with a large amount of molding sand. After each casting is completed, the molding sand needs to be recycled and reused. In the casting workshop, the entire sand box is usually lifted by a crane to the sand pit for collecting molding sand. Then, the entire sand box, along with the castings inside, is poured onto a filter screen. After the sand falls through, the castings are lifted away. The molding sand collected in the sand pit is then scooped up by workers using a forklift and repacked for reuse. The above method has several problems in actual operation: 1. When receiving sand boxes and castings through the filter screen, a large amount of molding sand is poured onto the screen surface at the same time, which can easily lead to accumulation. Workers need to use shovels to push the molding sand into the pit, which increases the workload and labor intensity of the workers; 2. After the molding sand in the sand box is poured into the sand pit, it needs to be shoveled up again if it is to be used again, which is relatively troublesome and increases the workload. Utility Model Content

[0003] The purpose of this utility model is to provide a foundry sand recovery device in response to the above-mentioned situation. This device reduces the workload of operators and improves production efficiency through simple and easy-to-implement improvement measures.

[0004] The specific solution of this utility model is as follows: a casting sand recycling device, which has a sand pit set under the ground. The bottom surface of the sand pit is set as an automatic sand sliding structure. A ring of supporting steps is set at the upper opening of the sand pit. A layer of filter screen is set above the supporting steps. The area of ​​the filter screen matches the upper opening of the sand pit. Several vibrators are evenly spaced on the supporting steps. Each vibrator is vertically installed. The vibrators are connected to the bottom edge of the filter screen and form a vibration transmission with it. Several supporting springs are also set between the supporting steps and the bottom surface of the filter screen.

[0005] Furthermore, the automatic sand-sliding structure described in this utility model has a sand-lowering trough that descends to one side, and an extending chute extending outward from the bottom of the sand pit, which transfers the molding sand in the sand pit to an externally mounted molding sand collecting belt.

[0006] Furthermore, in this invention, the vibrator is connected to the bottom of the filter screen via an elastic support member.

[0007] Furthermore, the elastic support member described in this utility model is made of wear-resistant rubber columnar pads or springs.

[0008] Furthermore, the sand pit described in this utility model is a rectangular sand pit with a depth of 1.5 to 2 meters.

[0009] Furthermore, the filter screen described in this utility model is made of strip steel plates assembled and welded together, and the mesh size of the filter screen is 1.5cm*2.5cm.

[0010] This utility model has the following beneficial effects:

[0011] This invention utilizes a vibrator designed for the filter screen to excite and clean the accumulated molding sand directly from the screen, eliminating the need for manual cleaning and saving manpower and resources. Furthermore, an automatic sand-sliding structure is incorporated at the bottom of the sand pit, allowing the falling molding sand to be transferred to a conveyor belt via an extended chute for easy transport and reuse. Additionally, the vibrator can also be used to clean molding sand adhering to cast pipe workpieces, achieving a dual-purpose machine. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model from the main view (including cross-sectional section).

[0013] Figure 2 This is a top view structural diagram of this utility model;

[0014] Figure 3 yes Figure 1 Enlarged schematic diagram of the structure at point K;

[0015] Figure 4 This is a schematic diagram of the utility model in use.

[0016] In the diagram: 1—sand pit, 2—lower sand trough, 3—supporting step, 4—filter screen, 5—extension chute, 6—vibrator, 7—supporting spring, 8—cast pipe workpiece, 9—molding sand. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] See Figures 1-3 This utility model relates to a foundry sand recycling device, comprising a sand pit 1 located underground. The bottom of the sand pit is configured with an automatic sand-sliding structure. A supporting step 3 is recessed at the upper opening of the sand pit. A filter screen 4 is installed above the supporting step, the area of ​​which matches the upper opening of the sand pit. Several vibrators 6 are evenly spaced on the supporting step, each vibrator being vertically mounted and connected to the bottom edge of the filter screen to form a vibration transmission. Several supporting springs 7 are also installed between the supporting step and the bottom surface of the filter screen. Furthermore, the automatic sand-sliding structure of this utility model has a lower sand trough 2 that descends to one side. The lower sand trough has an extending chute 5 extending outward from the bottom of the sand pit, which transfers the molding sand in the sand pit to an externally mounted molding sand collection belt (not shown in the figure).

[0020] Furthermore, in this embodiment, the vibrator and the bottom of the filter screen are connected by an elastic support. Furthermore, the elastic support in this invention is made of wear-resistant rubber cylindrical pads or springs. Furthermore, the sand pit in this invention is a rectangular sand pit with a depth of 1.5–2 m. Furthermore, the filter screen in this invention is made of strip steel plates assembled and welded together, and the mesh size of the filter screen is 1.5 cm * 2.5 cm.

[0021] When this utility model is in use, its usage state is as follows: Figure 4 As shown, the casting sand box and the cast pipe workpiece 8 inside are poured onto the filter sand screen. Then, the vibrator is started to vibrate the filter sand screen. The molding sand 9 on top falls into the lower sand trough at the bottom of the sand pit through vibration. Since the lower sand trough is designed to be inclined to one side, the molding sand will continue to be transported outwards towards the extension chute 5 due to its own gravity. Finally, it falls onto the externally connected sand conveyor belt for outward transport. Finally, the workers pour it back into the sand box for reuse.

[0022] The sand filter screen in this invention also has a screening function. During the casting process, some large-sized impurities may be mixed in the molding sand. The sand filter screen can also filter out these impurities.

[0023] This invention utilizes a vibrator designed for the filter screen to excite and clean the accumulated molding sand directly from the screen, eliminating the need for manual cleaning and saving manpower and resources. Furthermore, an automatic sand-sliding structure is incorporated at the bottom of the sand pit, allowing the falling molding sand to be transferred to a conveyor belt via an extended chute for easy transport and reuse. Additionally, the vibrator can also be used to clean molding sand adhering to cast pipe workpieces, achieving a dual-purpose machine.

Claims

1. A foundry sand recovery device, characterized in that: The device includes a sand pit located underground. The bottom of the sand pit is designed with an automatic sand-sliding structure. A supporting step is recessed at the upper opening of the sand pit. A filter screen is installed above the supporting step, and the area of ​​the filter screen matches the upper opening of the sand pit. Several vibrators are evenly spaced on the supporting step. Each vibrator is vertically installed and connected to the bottom edge of the filter screen to form a vibration transmission. Several supporting springs are also installed between the supporting step and the bottom surface of the filter screen.

2. The foundry sand recovery device according to claim 1, characterized in that: The automatic sand-sliding structure has a sand-lowering trough that descends to one side. The sand-lowering trough has an extension chute extending outward from the bottom of the sand pit. The extension chute transfers the molding sand in the sand pit to an external molding sand collection belt.

3. The foundry sand recovery device according to claim 1, characterized in that: The vibrator is connected to the bottom of the filter screen by an elastic support.

4. The foundry sand recovery device according to claim 3, characterized in that: The elastic support is made of wear-resistant rubber columnar pads or springs.

5. A foundry sand recovery device according to claim 1, characterized in that: The sand pit is rectangular and has a depth of 1.5 to 2 meters.

6. The foundry sand recovery device according to claim 1, characterized in that: The filter screen is made of strip steel plates assembled and welded together, and the mesh size of the filter screen is 1.5cm*2.5cm.

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