Rotary dust treatment device and system for large castings pouring and cooling

Abstract

The utility model discloses a kind of rotary smoke treatment devices and systems for large casting pouring cooling, it is related to casting dust removal technical field, and it includes: dust hood is set on the top of pit pouring mold, with support air pipe intercommunication, for capturing smoke dust;Support air pipe, one end is rotatably connected with dust hood, and the other end is connected with the pipeline of dust removal system;Telescopic air cylinder is installed on the top of support air pipe by fixing frame, rotatably connected with dust hood top, for driving dust hood 90 ° rotation;The utility model is in normal state dust hood is in vertical state, does not affect the modeling process in pit, before large resin sand mold pouring, telescopic air cylinder extends and drives dust hood to rotate 90 ° to horizontal state, is located just above pouring mold, can filter purification collection treatment to the smoke and dust generated during mold pouring and cooling process, effectively improve smoke dust capturing capacity, reduce workshop environmental pollution, realize the purpose of green environmental protection, energy saving and emission reduction.

Description

Technical Field

[0001] This utility model relates to the field of casting dust removal technology, specifically to a rotary dust treatment device and system for cooling large castings. Background Technology

[0002] Currently, in the foundry industry, large castings are generally made using resin sand molding. Due to the large volume and weight of the molding molds for large castings, for safety and dust control purposes, the molding molds are usually placed in a pit and arranged along both sides of the pit. During pouring and cooling, large resin sand molds generate a large amount of dust and smoke, emitting strong fumes and odors. Furthermore, due to the baking effect of the high-temperature molten iron, the fumes contain not only dust, CO, SO2, H25, ammonia, cyanide, benzene, and polycyclic aromatic hydrocarbons, but also highly viscous resin volatiles. These resin volatiles, when mixed with the dust, produce a highly viscous and flammable black grease, severely polluting the workshop environment and endangering the health of workers.

[0003] Currently, there are two main methods for dust collection during the resin sand casting and cooling process of large castings: side suction and top suction. Side suction involves installing a suction hood horizontally away from the casting mold on the side of the casting station. This method has relatively weak dust capture capabilities and poor dust treatment results. Top suction involves installing a suction hood on the ceiling of the pit casting station. Because it needs to avoid obstructing the molding and casting operations, the top-mounted suction hood needs to be vertically away from the casting mold. This method also has relatively weak dust capture capabilities, often requiring increased exhaust fan power to achieve a certain dust treatment effect, resulting in high power consumption. Utility Model Content

[0004] In view of one or more shortcomings of the existing technology, the present invention provides a rotary dust treatment device and system for cooling large castings, which can perform top suction dust collection at the casting pit at close range, and can be rotated and retracted without hindering the molding and casting process, greatly improving the dust treatment effect, saving energy, and solving the technical problems existing in the prior art.

[0005] To achieve the above objectives, this utility model adopts one or more of the following technical solutions:

[0006] In a first aspect, a rotary fume treatment device for cooling large castings is provided for pit casting, comprising:

[0007] The dust collection hood is vertically installed above the casting mold in the pit and connected to the supporting air duct to capture smoke and dust.

[0008] A horizontally arranged support duct is rotatably connected at one end to the dust collection hood and at the other end to the duct of the dust removal system.

[0009] A telescopic cylinder is mounted above the supporting air duct via a fixed frame and is rotatably connected to the dust collection hood.

[0010] The telescopic cylinder can move between a contracted state and an extended state. When the telescopic cylinder changes from a contracted state to an extended state, it drives the dust collection hood to rotate from a vertical direction to a horizontal direction.

[0011] As a further implementation, the fixing frame is an I-shaped support, the bottom of the fixing frame is fixedly connected to the supporting air duct, and a first hinge seat is provided on the side of the fixing frame. The telescopic cylinder is rotatably connected to the fixing frame through the first hinge seat.

[0012] As a further implementation, a second hinge seat is fixedly installed on the dust collection hood, and the second hinge seat is rotatably connected to the telescopic rod of the telescopic cylinder.

[0013] As a further implementation, the end of the supporting air duct is provided with a rotating shaft, and the supporting air duct and the dust collection hood are rotatably connected through the rotating shaft.

[0014] As a further implementation, a spring self-locking pin is installed on one side of the dust collection hood, and a pin hole corresponding to the spring self-locking pin is opened on the rotating shaft to lock the dust collection hood in the vertical direction.

[0015] As a further implementation, a pull ring is fixedly provided at the outer end of the spring self-locking pin to facilitate unlocking the spring self-locking pin.

[0016] As a further implementation, the supporting duct includes a horizontally arranged rectangular duct section and a vertically arranged transition duct section. The fixing frame is installed on the upper part of the rectangular duct section, and the top of the transition duct section is sealed to the duct of the dust removal system.

[0017] As a further implementation, the bends of the rectangular tube segment are rounded to create a smooth transition, which reduces stress concentration and facilitates the flow of gas carrying dust, thereby improving dust collection and removal efficiency.

[0018] On the other hand, a rotary dust treatment system for cooling large castings is provided, comprising a rotary dust treatment device for cooling large castings as described in any of the above claims. The system further comprises a dust collection pipe, a fan, a purification device, an exhaust chimney, and a controller. One end of the dust collection pipe is connected to a supporting duct, and the other end is connected to the purification device. The output end of the purification device is equipped with a fan and an exhaust chimney. The fan provides the power to attract dust, and the gas purified by the purification device is discharged through the exhaust chimney. The controller controls the entire system to operate according to a program.

[0019] As a further implementation, multiple rotating dust collection devices are arranged in two rows on both sides of the pit, with multiple sets in each row, so as to collect dust from both sides during the pouring process, effectively improving the dust collection capacity and the dust treatment effect.

[0020] As a further implementation, the purification device includes a pulse jet filter dust collector, a pneumatic spray tower, and an activated carbon adsorption box. The pulse jet filter dust collector includes a box body, a pulse jet cleaning device, filter cartridges, and a dust discharge device. The pneumatic spray tower consists of a tower body, a cyclone device, a spray device, and a water circulation device. The activated carbon adsorption box consists of a cabinet body, an activated carbon layer, filter components, and a fan system.

[0021] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0022] 1. The rotary dust collection device of this utility model, through the cooperation of a dust collection hood, a telescopic cylinder, and a supporting air duct, allows the dust collection hood to be installed close to the casting station in the pit. Under normal conditions, the dust collection hood is in a vertical position, which does not affect the molding process in the pit. Before the casting of large casting resin sand molds, the telescopic cylinder is extended to rotate the dust collection hood 90° to a horizontal position, located directly above the casting mold. This allows for the filtration, purification, and collection of smoke and dust generated during the casting and cooling process, which is then passed through the supporting air duct to subsequent purification treatment. This effectively improves the dust capture capacity, greatly reduces dust escape, and alleviates environmental pollution in the workshop. At the same time, it does not require a significant increase in suction power, saving electricity while achieving clean operation. This achieves the goals of green environmental protection, energy conservation, and emission reduction, and is conducive to creating a good workshop environment and protecting the health of workers.

[0023] 2. This utility model uses a cylinder to drive the dust collection hood to rotate for dust collection and reset, which does not affect the molding process. It has the advantages of small air volume, high efficiency, low energy consumption, and convenient operation. In addition, the drive structure is easy to install and use, and the manufacturing cost is low. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the spring self-locking pin structure according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the dust collection hood in operation according to an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the dust collection hood in its reset state according to an embodiment of the present invention.

[0030] In the diagram: 1. Dust collection hood; 2. Supporting duct; 21. Rectangular duct section; 22. Transition duct section; 3. Telescopic cylinder; 4. Fixing frame; 5. First hinge seat; 6. Second hinge seat; 7. Rotating shaft; 8. Spring self-locking pin; 81. Pin head; 82. Connecting plate; 83. Compression spring; 84. Fixing plate; 85. Pull ring; 86. Connecting rope; 87. Slider; 9. Fixing base;

[0031] 1000. Casting mold. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0034] Example 1

[0035] In one typical embodiment of this application, a rotary fume treatment device for cooling large castings is provided, used for pit casting, such as... Figure 1-5 As shown, it includes:

[0036] Dust collection hood 1 is vertically installed directly above the casting mold in the pit and is connected to the supporting air duct 2 to capture smoke and dust;

[0037] The horizontally installed support duct 2 is rotatably connected at one end to the dust collection hood 1 and at the other end to the duct of the dust removal system;

[0038] The telescopic cylinder 3 is mounted above the supporting air duct 2 via the fixing frame 4 and is rotatably connected to the top of the dust collection hood 1;

[0039] The telescopic cylinder 3 can move between the contracted state and the extended state. When the telescopic cylinder 3 changes from the contracted state to the extended state, it drives the dust collection hood 1 to rotate from the vertical direction to the horizontal direction.

[0040] Specifically, such as Figure 1 As shown, the supporting duct 2 has a bent structure and is fixedly installed on the factory building columns. The supporting duct 2 includes a horizontally arranged rectangular section 21 and a vertically arranged transition section 22. The rectangular section 21 is connected to the dust collection hood 1. The bottom cross-section of the transition section 22 is rectangular and connected to the rectangular section. The top cross-section of the transition section 22 is circular and is used for a sealed connection with the dust removal system's pipeline. Smoke and dust can be drawn into the dust collection hood by the fan of the dust removal system, and then transported to the dust removal system's pipeline through the supporting duct for subsequent purification and dust removal treatment. The supporting duct 2 is welded from SGCC galvanized steel plate, which ensures lightweight construction, facilitates processing and installation, and has good rigidity. It can provide stable support for the top fixing frame and cylinder without deformation, enhancing the overall reliability of the device.

[0041] In this embodiment, as Figure 1 As shown, the bends of the supporting duct 2 are rounded to achieve a smooth transition, thereby reducing stress concentration, extending the service life of the structure, and allowing the absorbed smoke and dust to flow more smoothly, improving dust collection and removal efficiency.

[0042] Specifically, such as Figure 1 As shown, a fixed frame 4 is installed on the top of the supporting duct 2. One end of the telescopic cylinder 3 is hinged to the fixed frame 4, and the other end is hinged to the top of the dust collection hood 1. When the telescopic cylinder 3 extends or retracts, it drives the dust collection hood 1 to rotate around the rotating shaft 7, thereby realizing the angle adjustment of the dust collection hood. The rotation range of the dust collection hood can be controlled by setting the stroke of the telescopic cylinder, thereby realizing the switching between the working state and the non-working state of the dust collection hood. In this embodiment, the telescopic cylinder adopts the QGB series multi-stage sleeve telescopic cylinder, with a cylinder diameter of 150mm-320mm and a stroke of 1000mm-3000mm. It can achieve a long stroke in a small installation space, with a compact structure. Furthermore, through the multi-stage sleeve design, it can gradually extend and retract, and the output force is stable.

[0043] In this embodiment, combined with Figure 1As shown, the fixing frame 4 adopts a vertically arranged I-shaped bracket, which is fixedly connected to the supporting air duct 2. A first hinge seat 5 is fixedly installed on one side of the fixing frame 4 by bolts, and the first hinge seat 5 is rotatably connected to the telescopic cylinder 3. In order to increase the structural support strength, in the preferred embodiment of this application, a fixing base 9 is provided at the bottom of the fixing frame leg. The top of the fixing base 9 is welded to the fixing frame 4, and is also installed to the supporting air duct 2 by bolts. This increases the contact area with the supporting air duct, thereby improving the stability of the telescopic cylinder support. At the same time, the bolt fixing facilitates installation and disassembly.

[0044] Combination Figure 4 and Figure 5 As shown, the dust collection hood is installed directly above the casting mold in the pit, used in conjunction with the dust removal system to capture and extract smoke and dust generated during the molding and cooling process. In this embodiment, the dust collection hood 1 has a right-angled trapezoidal shape on its side, with an outline dimension of 4000mm wide × 7000mm long, completely covering the casting mold 1000 directly above it, drawing as much smoke and dust generated during casting and cooling as possible into the dust collection hood to prevent leakage. The dust collection hood 1 and the supporting air duct 2 are rotatably connected via a rotating shaft 7, and the support is pulled by a telescopic cylinder 3. A second hinge seat 6 is fixedly installed on the top of the dust collection hood 1, and the end of the telescopic rod of the telescopic cylinder 3 is rotatably connected to the second hinge seat 6. The dust collection hood is made of SGCC galvanized steel plate, which has good corrosion resistance, extends the service life of the pipe, and is environmentally friendly and safe. In this embodiment, one end of the dust collection hood 1 connected to the rotating shaft 7 is hollowed out, and the end of the supporting air duct near the dust collection hood is machined with rounded corners to prevent interference with the end of the supporting air duct during rotation.

[0045] It should be noted that in other embodiments, the number of telescopic cylinders can be increased adaptively according to the size and weight of the dust collection hood to better meet the actual needs of workshop production.

[0046] Specifically, in order to improve on-site safety in the workshop and prevent the dust collection hood from falling when the telescopic cylinder is closed, spring self-locking pins 8 are respectively provided on both sides of the dust collection hood in this embodiment to limit the dust collection hood and keep it in a vertical state under normal conditions. Only after the spring self-locking pins are unlocked can the telescopic cylinder be driven to rotate, thereby eliminating safety hazards, preventing the dust collection hood from falling automatically and injuring workers, and providing a guarantee for safe production.

[0047] In this embodiment, combined with Figure 2 and Figure 3 As shown, the spring-loaded self-locking pin 8 is installed at the end of the dust collection hood 1, including a pin head 81, a connecting plate 82, a compression spring 83, a fixing plate 84, and a pull ring 85. The fixing plate 84 is located on the outside of the dust collection hood 1 and is fixedly connected to the dust collection hood 1. The inner side of the fixing plate 84 is fixedly connected to one end of the compression spring 83, and the other end of the compression spring 83 is fixedly connected to the connecting plate 82. Figure 3As shown, sliders 87 are symmetrically fixed to both horizontal sides of the connecting plate 82. A linear track is provided inside the dust collection hood at a position corresponding to the slider, forming a sliding pair. The pin head 81 and the connecting plate 82 can move linearly relative to the dust collection hood 1 through the cooperation of the slider 87 and the linear track under the action of a compression spring or external force. The connecting plate 82 is fixedly connected to a pull ring 85 via a connecting rope 86. The connecting rope 86 passes through the fixed plate 84, and the pull ring 85 is located outside the fixed plate 84 for easy operation. The pin head 81 is fixedly connected to the side of the connecting plate away from the spring. A pin hole is provided at a corresponding position on the rotating shaft 7 to cooperate with the pin head. When the pin head of the spring self-locking pin extends into the pin hole under the elastic force of the compression spring, the dust collection hood is restricted to a vertical position and cannot rotate further. When the pull ring is pulled to release the pin head from the pin hole and enter the unlocked state, the spring self-locking pin can rotate with the dust collection hood under the drive of the telescopic cylinder. In this embodiment, as shown... Figure 1 and Figure 5 As shown, when the dust collection hood 1 is in a vertical position, the pull ring 85 hangs down, making it easy for the staff to pull the pull ring to unlock the spring self-locking pin from the pin hole.

[0048] The working principle of this embodiment is as follows:

[0049] Combination Figures 4-5 As shown, under normal conditions, the telescopic rod of the telescopic cylinder 3 is in the retracted state. At this time, the dust collection hood 1 is vertical, and the pin head 81 of the spring self-locking pin 8 is locked in the pin hole under the elastic force of the compression spring 83, preventing the dust collection hood from falling down accidentally and causing a safety accident.

[0050] Once the casting mold 1000 is in place in the pit, when casting is required, pull the pull ring 85 to unlock the spring self-locking pin 8, and then start the telescopic cylinder 3. The telescopic cylinder 3 rotates the dust collection hood 1 90° to a horizontal position according to the set stroke or is controlled by the program, covering the top of the casting mold 1000. This can accurately and efficiently collect the smoke and dust and transport it to the pipeline of the dust removal system for subsequent treatment, so that the gas emissions meet the standards.

[0051] In addition, this application also provides a rotary dust treatment system for cooling large castings. The system includes the rotary dust treatment device for cooling large castings as described in the above embodiments, and further includes: a dust removal pipe, a fan, a purification device, an exhaust chimney, and a controller. Specifically, one end of the dust removal pipe is connected to a supporting duct, and the other end is connected to the purification device. The output end of the purification device is equipped with a fan and an exhaust chimney. The fan provides the power to draw in the dust, improving the dust removal efficiency. At the same time, the dust collection hood better captures the smoke and dust. The captured smoke and dust enter the purification device through the supporting duct and the dust removal pipe. The purified gas is discharged to the atmosphere through the exhaust chimney. The controller is used to control the entire system to operate according to the program, and the telescopic cylinder can be connected to the controller.

[0052] In a preferred embodiment, the rotating dust collection devices are arranged in two rows on both sides of the pit, with multiple sets in each row, so as to collect dust from both sides during the pouring process, effectively improving the dust capture capacity and the dust treatment effect. The dust treatment system can be connected to multiple sets of rotating dust collection devices through dust removal pipes.

[0053] In a further embodiment, the purification treatment device includes a pulse jet filter dust collector, a pneumatic spray tower, and an activated carbon adsorption box, which sequentially treat the flue gas transported through the dust collection pipe. The pulse jet filter dust collector consists of a housing, a pulse jet cleaning device, filter cartridges, and a dust discharge device; the pneumatic spray tower consists of a tower body, a cyclone device, a spray device, and a water circulation device; and the activated carbon adsorption box consists of a cabinet body, an activated carbon layer, filter components, and a fan system. All of these are existing technologies and will not be described in detail here.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it. Those skilled in the art should understand that this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary dust treatment device for cooling large castings, used for pit casting, characterized in that, include: The dust collection hood is vertically installed directly above the casting mold in the pit and is connected to the supporting air duct to capture smoke and dust. A horizontally arranged support duct is rotatably connected at one end to the dust collection hood and at the other end to the duct of the dust removal system. A telescopic cylinder is mounted above the supporting air duct via a fixed frame and is rotatably connected to the dust collection hood. The telescopic cylinder can move between a contracted state and an extended state. When the telescopic cylinder changes from a contracted state to an extended state, it drives the dust collection hood to rotate from a vertical direction to a horizontal direction.

2. The rotary dust treatment device for cooling large castings as described in claim 1, characterized in that, The fixed frame is an I-shaped support, and the bottom of the fixed frame is fixedly connected to the supporting air duct. A first hinge seat is provided on the side of the fixed frame, and the telescopic cylinder is rotatably connected to the fixed frame through the first hinge seat.

3. The rotary dust treatment device for cooling large castings as described in claim 1, characterized in that, A second hinge seat is fixedly installed on the dust collection hood, and the second hinge seat is rotatably connected to the telescopic rod of the telescopic cylinder.

4. The rotary dust treatment device for cooling large castings as described in claim 1, characterized in that, The end of the supporting air duct is provided with a rotating shaft, and the supporting air duct and the dust collection hood are rotatably connected through the rotating shaft.

5. The rotary dust treatment device for cooling large castings as described in claim 4, characterized in that, A spring-loaded self-locking pin is installed on one side of the dust collection hood, and a pin hole corresponding to the spring-loaded self-locking pin is opened on the rotating shaft to lock the dust collection hood in the vertical direction.

6. The rotary dust treatment device for cooling large castings as described in claim 5, characterized in that, A pull ring is fixed to the outer end of the spring self-locking pin.

7. The rotary dust treatment device for cooling large castings as described in claim 1, characterized in that, The supporting duct includes a horizontally arranged rectangular duct section and a vertically arranged transition duct section. The fixing frame is installed on the upper part of the rectangular duct section, and the top of the transition duct section is sealed to the duct of the dust removal system.

8. The rotary dust treatment device for cooling large castings as described in claim 7, characterized in that, The rectangular tube section has rounded corners at the bends.

9. A rotary dust treatment system for cooling large castings, characterized in that, The system includes a rotary dust removal device for cooling large castings as described in any one of claims 1-8. The system further includes a dust removal pipe, a fan, a purification device, an exhaust chimney, and a controller. One end of the dust removal pipe is connected to a supporting duct, and the other end is connected to the purification device. The output end of the purification device is equipped with a fan and an exhaust chimney. The fan provides the power to attract dust, and the gas purified by the purification device is discharged through the exhaust chimney. The controller controls the entire system to operate according to the program.

10. A rotary dust treatment system for cooling large castings as described in claim 9, characterized in that, Multiple rotating dust treatment devices are arranged in two rows on both sides of the pit, with multiple sets in each row.

Images