A casting sand screening device for stainless steel pipe fittings

Abstract

This utility model discloses a stainless steel pipe fitting casting sand screening device, including a rotatable drum screen. An inclined collection trough is located below the drum screen. A discharge pipe head with an open end is horizontally positioned at the bottom right side of the collection trough along the front-back direction. The portion of the discharge pipe head inside the collection trough has a feed notch, which is adapted to the shape of the bottom structure of the collection trough. A conveying pipe is installed at the open end of the discharge pipe head. Conveying augers are installed inside both the discharge pipe head and the conveying pipe. This utility model, by setting an inclined drum screen below the drum screen and installing conveying augers in the discharge pipe head and conveying pipe at the lower end of the drum screen, allows for the conveying of recovered molding sand. The conveying pipe can extend directly into the molding sand storage cylinder, thus achieving simultaneous screening and conveying, eliminating manual handling and greatly facilitating molding sand recycling.

Description

Technical Field

[0001] This utility model relates to the technical field of molding sand screening equipment, specifically to a molding sand screening device for stainless steel pipe fittings. Background Technology

[0002] Casting is a method of pouring molten metal into a molded cavity that conforms to the shape of the part, and then allowing it to cool and solidify to obtain the part or blank. Sand casting uses molding sand as the mold material. After use, molding sand generally needs to be recycled. However, after multiple reuses, the molding sand will contain a certain amount of coarse sand, fragments, and other impurities. These impurities affect the quality of subsequent molding. Therefore, the molding sand needs to be screened to filter out the fine sand that meets the standards and remove the impurities. Currently, trommel screens are generally used for screening molding sand to separate the repeatedly used sand. Molding sand is poured into a rotary drum screen. After being screened, the molding sand that meets the composite requirements falls through the filter holes on the drum screen, while impurities slide along the inclined inner wall of the drum screen and are discharged. The molding sand that meets the composite requirements falls into the collection trough at the bottom of the drum screen. However, after collecting the molding sand, workers need to move the collection box to the molding sand storage hopper. The whole process requires the use of a trolley. Since the collection trough is full of molding sand, hoisting equipment is sometimes needed to move the material, which greatly increases the workload of the workers. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a stainless steel pipe casting sand screening device to solve the aforementioned technical problems.

[0004] The present invention adopts the following technical solution: a stainless steel pipe fitting casting sand screening device, including a drum screen rotatably mounted on a frame, a V-shaped collection trough below the drum screen, the collection trough being inclined from left to right and located directly below the drum screen with a screen mesh, a discharge pipe head with an open end is horizontally placed at the bottom of the lower right end of the collection trough along the front-back direction, the part of the discharge pipe head located inside the collection trough is provided with a feed notch, the feed notch is adapted to the shape of the bottom structure of the collection trough, a conveying pipe is provided at the open end of the discharge pipe head, and a conveying auger is provided inside the discharge pipe head and the conveying pipe.

[0005] Furthermore, the conveying pipe is a plastic flexible hose, and the conveying auger is a shaftless screw conveyor.

[0006] Furthermore, the discharge pipe head is equipped with a drive motor at its closed end, and the shaft of the drive motor is fixedly connected to the end of the conveying auger, which rotates under the drive of the drive motor.

[0007] Furthermore, a vibrator is installed on the outer wall of the collection trough.

[0008] Furthermore, the material collection trough is provided with support legs at its bottom.

[0009] Furthermore, a drive motor is provided on the outer side of the frame at a position corresponding to one end of the drum screen. Both the shaft of the drive motor and the shaft at one end of the drum screen are provided with transmission wheels, and the two transmission wheels are connected by a transmission belt.

[0010] Furthermore, a feed hopper is provided on the side of the frame away from the drive motor, and the feed hopper extends into the interior of the drum screen.

[0011] The above-mentioned technical solution of this utility model has the following beneficial effects: This utility model sets an inclined drum screen below the drum screen, and sets a discharge pipe head and a conveying pipe at the low end of the drum screen. The two pipe sections are equipped with conveying augers, so as to convey the recovered molding sand. The conveying pipe can directly extend into the storage cylinder of the molding sand, thereby realizing the simultaneous screening and conveying, saving the workers from handling operations, and bringing great convenience to the recycling of molding sand. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the main plan view structure of an embodiment of this utility model;

[0014] Figure 2 This is a side cross-sectional view of the material collection trough in an embodiment of the present invention;

[0015] Figure 3 This is a top view of the material collection trough in an embodiment of the present invention. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figure 1-3 As shown, this utility model embodiment provides a stainless steel pipe fitting casting sand screening device, including a drum screen 2 rotatably mounted on a frame 1. A V-shaped collection trough 3 is provided below the drum screen 2. The collection trough 3 is arranged at an inclination with the left side higher than the right side, directly below the drum screen 2 with the screen mesh. A discharge pipe head 4 with one end open is horizontally placed at the bottom of the lower right end of the collection trough 3 along the front-back direction. The part of the discharge pipe head 4 located inside the collection trough 3 is provided with a feeding notch 4a. The feeding notch 4a is adapted to the shape of the bottom structure of the collection trough 3. A conveying pipe 5 is provided at the open end of the discharge pipe head 4. A conveying auger 6 is provided inside the discharge pipe head 4 and the conveying pipe 5.

[0019] Preferably, the conveying pipe 5 is a plastic flexible hose, and the conveying auger 6 is a shaftless screw conveyor. The flexible hose structure of the conveying pipe 5 allows it to be offset in multiple directions when connected to the molding sand storage tank, making installation more convenient. The shaftless screw conveyor can change shape along with the shape of the conveying pipe 5, thereby improving the adaptability of the conveying pipe 5 assembly.

[0020] The discharge pipe head 4 is equipped with a drive motor 7 at its closed end. The shaft of the drive motor 6 is fixedly connected to the end of the conveying auger 6, and the conveying auger 6 rotates under the drive of the drive motor 7.

[0021] Preferably, the discharge pipe head 4 is provided with a rotating shaft at one of its closed ends, one end of the conveying auger 6 is connected to the rotating shaft, and the shaft of the drive motor 7 is connected to the other end of the rotating shaft.

[0022] A vibrator 8 is installed on the outer wall of the collection trough 3. The vibrator 8 can make the collection trough 3 vibrate, so that the molding sand can move along the slope at the bottom of the collection trough 3 towards the discharge pipe head 4.

[0023] The material collection trough 3 is equipped with support legs 9 at its bottom.

[0024] A drive motor 10 is installed on the outer side of the frame 1 at one end of the corresponding drum screen 2. Both the shaft of the drive motor 10 and the shaft at one end of the drum screen 2 are equipped with transmission wheels 11, and the two transmission wheels 11 are connected by a transmission belt 12.

[0025] A feed hopper 12 is provided on the side of the frame 1 away from the drive motor 10, and the feed hopper 12 extends into the interior of the drum screen 2.

[0026] The feed hopper 12 is located at the raised end of the drum screen 2, and the drive motor 10 is located at the lowered end of the drum screen 2.

[0027] The working principle of this utility model is as follows: Reusable molding sand is fed into the feed hopper 12 and enters the interior of the drum screen 2. The drive motor 10 rotates the drum screen 2, causing the molding sand to move along the inclined drum screen 2 towards its downward-facing opening. During this movement, reusable molding sand falls through the mesh of the drum screen 2 and is collected by the collection trough 3. Larger impurities are discharged through the opening at the end of the drum screen 2. A waste bin is located below the downward-facing end of the drum screen, where the filtered impurities fall. The screened molding sand falls into the collection trough 3. The vibrator 8 on the trough 3 operates, causing the screened molding sand to move along the inclined bottom wall of the trough 3 towards the discharge pipe head 4. At this time, the molding sand enters the discharge pipe head 4 through the feed notch 4a. Meanwhile, the drive motor 7 drives the conveying auger 6 to rotate. As the conveying auger 6 rotates, its spiral blades transport the screened molding sand to the end of the conveying pipe 5 with the discharge port, leading the discharge port of the conveying pipe 5 into the molding sand storage cylinder. In this way, the screened molding sand can be directly transported into the storage cylinder, eliminating the need for workers to handle the trough 3, reducing the workload of workers, and improving the conveying efficiency of molding sand.

[0028] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A stainless steel pipe fitting casting sand screening device, characterized in that: The device includes a rotary screen rotatably mounted on a frame. A V-shaped collection trough is located below the rotary screen. The collection trough is arranged at an angle, higher on the left and lower on the right, directly below the screen section. A discharge pipe head with an open end is horizontally positioned at the bottom of the lower right end of the collection trough along the front-back direction. The portion of the discharge pipe head inside the collection trough has a feed notch that matches the shape of the bottom structure of the collection trough. A conveying pipe is provided at the open end of the discharge pipe head, and a conveying auger is installed inside the discharge pipe head and the conveying pipe.

2. The stainless steel pipe fitting casting sand screening device according to claim 1, characterized in that: The conveying pipe is a plastic flexible hose, and the conveying auger is a shaftless screw conveyor.

3. The stainless steel pipe fitting casting sand screening device according to claim 2, characterized in that: The discharge pipe head is equipped with a drive motor at its closed end. The shaft of the drive motor is fixedly connected to the end of the conveying auger, and the conveying auger rotates under the drive of the drive motor.

4. The stainless steel pipe fitting casting sand screening device according to claim 1, characterized in that: A vibrator is installed on the outer wall of the collection trough.

5. The stainless steel pipe fitting casting sand screening device according to claim 1, characterized in that: The material collection trough is equipped with support legs at its bottom.

6. The stainless steel pipe fitting casting sand screening device according to claim 1, characterized in that: A drive motor is installed on the outer side of the frame at one end corresponding to the drum screen. Both the shaft of the drive motor and the shaft at one end of the drum screen are equipped with transmission wheels, which are connected by a transmission belt.

7. The stainless steel pipe fitting casting sand screening device according to claim 6, characterized in that: A feed hopper is provided on the side of the frame away from the drive motor, and the feed hopper extends into the interior of the drum screen.

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