Ventilation device for metallurgical manual sand mold casting

Abstract

The utility model belongs to the field of casting ventilation, and discloses a ventilation device for metallurgical manual sand mold casting. Comprising a closed pouring room provided with a working channel, a plurality of air supply outlets formed in the top of the pouring room, an air supply pipeline communicated with each air supply outlet, an air supply device connected with the air supply pipeline, a plurality of air exhaust outlets formed in the side face of the pouring room, an air exhaust pipeline communicated with each air exhaust outlet and an air exhaust device connected with the air exhaust pipeline. The inner wall of the top plate of the pouring room separates the air supply outlets through a plurality of partition plates, and air distribution assemblies are arranged below the partition plates. Laminar flow ventilation of the pouring room is achieved, the height of pollutants is controlled by adjusting the air supply amount and the air exhaust amount, and therefore the upper portion of the body of a production operator is located in a clean area, limited clean ventilation is achieved, and the purpose of protecting the body health of the production operator is achieved.

Description

Technical Field

[0001] The utility model relates to the field of casting ventilation, in particular to a ventilation device for metallurgical manual sand casting. Background Art

[0002] The sand casting process is divided into several steps: wooden mold making - sand casting - melting - pouring - sand falling - removal of pouring risers - cleaning - inspection and warehousing. A certain amount of harmful waste gas containing dust, carbon monoxide and ammonia will be generated during the sand casting and pouring process, but the concentration is not too large. This type of workshop generally uses organized natural ventilation and mobile fans to carry out job ventilation.

[0003] As environmental protection and occupational health requirements become increasingly stringent, higher requirements are placed on enterprises to save energy and reduce emissions and protect the occupational health of employees. Traditional ventilation methods can no longer meet production needs. How to solve such problems at a low cost has been highly valued by relevant companies, but in the process of implementation, the ventilation effect is often poor due to limited airflow control, especially in the manual casting of small pieces. Unreasonable ventilation methods often cause smoke in the workshop, which has a negative impact on on-site operators to a certain extent and does not meet environmental protection requirements.

[0004] Based on this, the present invention provides a ventilation device for metallurgical manual sand casting, which focuses on solving the ventilation problem of manual pouring of small metallurgical parts. Utility Model Content

[0005] The utility model aims to solve the problem that the traditional ventilation method often makes the workshop full of smoke, which has a certain adverse effect on the on-site operators and does not meet the environmental protection requirements. To this end, the utility model provides a ventilation device for metallurgical manual sand casting, which uses the most economical ventilation method to meet the occupational health and environmental protection requirements of the casting section, and achieves the purpose of protecting the health of production operators.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Provided is a ventilation device for metallurgical manual sand casting, comprising a closed casting room with a working channel, a plurality of air supply ports arranged on the top of the casting room, an air supply duct connected to each of the air supply ports, an air supply device connected to the air supply duct, a plurality of exhaust ports arranged on the side of the casting room, an exhaust duct connected to each of the exhaust ports, and an exhaust device connected to the exhaust duct; the inner wall of the top plate of the casting room separates each of the air supply ports by a plurality of partitions, and an air distribution component is provided below the partition.

[0008] Preferably, the air distribution assembly is composed of a diamond-shaped steel wire mesh and a 100-mesh steel wire mesh, and the steel wire mesh is fixedly laid on the upper surface of the steel wire mesh.

[0009] Preferably, the height of the partition is not less than 350 mm.

[0010] Preferably, the casting room is welded with light steel, and the working channel and the exhaust port are arranged along the length direction of the casting room.

[0011] Preferably, a multi-leaf split regulating valve is provided on the exhaust branch pipe connecting the exhaust port and the exhaust duct.

[0012] Preferably, the caliber of the exhaust duct increases from the blind end to the exhaust end, and a pressure sensor is provided at the exhaust end of the exhaust duct.

[0013] Preferably, both the air supply device and the air exhaust device adopt variable frequency fans.

[0014] Preferably, the air inlet end and the air outlet end of the exhaust device are also provided with an exhaust gas treatment device and an exhaust pipe respectively.

[0015] Preferably, a cooling device is further provided on the air inlet side of the air supply device, and the cooling device is a wet curtain device, a spray device, or an air conditioning device.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model adopts the method of supplying air from the top of the casting room, and evenly distributes the air through an air distribution component. At the same time, both the air supply device and the exhaust device adopt variable frequency fans, which is convenient for controlling the air supply volume to be smaller than the exhaust volume. The working channel is used as a channel for balancing the air volume, thereby realizing laminar flow ventilation in the casting room. The height of pollutants is controlled by adjusting the air volume of the supply and exhaust air, so that the upper part of the body of the production workers is in a clean area, realizing limited clean ventilation, and achieving the purpose of protecting the health of the production workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a plan view of a ventilation device for metallurgical manual sand casting provided by the utility model;

[0020] Figure 2 yes Figure 1 AA section view provided;

[0021] Figure 3 yes Figure 2BB cross-section view provided.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1—casting room, 1.0—working channel, 1.1—air supply port, 1.2—exhaust port, 2—air supply device, 3—air supply duct, 4—exhaust duct, 5—exhaust device, 6—waste gas treatment device, 7—exhaust pipe, 8—partition, 9—air distribution assembly, 9.1—wire mesh, 9.2—wire mesh, 10—pressure sensor, 11—multi-leaf split regulating valve. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; the terms "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Embodiment 1

[0029] This embodiment provides a ventilation device for metallurgical manual sand casting, as shown in the attached Figure 1and attached Figure 2 As shown, it includes a casting room 1, an air supply device 2, an air supply duct 3, an exhaust duct 4 and an exhaust device 5, wherein:

[0030] The casting room 1 is a closed casting room made of light steel welded and provided with a working channel 1.0. The small sand casting section is arranged in the casting room. The net height of the casting room can be set to 2200mm, and the net height of the open corresponding to the working channel can be set to 1900mm. The top and side of the casting room 1 are respectively provided with multiple air supply ports 1.1 and exhaust ports 1.2, wherein the air supply ports 1.1 are horizontal air outlets, and the working channel 1.0 and the exhaust ports 1.2 are arranged along the length direction of the casting room 1. The air supply duct 3 is connected to each air supply port 1.1 through multiple air supply branch pipes, and the air supply device 2 is connected to the air supply duct 3 to supply air to the casting room 1. The exhaust duct 3 is connected to each exhaust port 1.2 through multiple exhaust branch pipes, and the exhaust device 5 is connected to the exhaust duct 4, which is used to actively extract the air in the casting room 1, and the exhausted air is discharged after being treated by the exhaust gas treatment device. Therefore, in this embodiment, an exhaust gas treatment device 6 and an exhaust pipe 7 are respectively provided at the air inlet end and the air outlet end of the exhaust device.

[0031] Preferably, in order to achieve uniform air distribution in the casting room 1, as shown in the attached Figure 2 As shown, in this embodiment, each of the air supply ports 1.1 is separated by a plurality of partitions 8 on the inner wall of the top plate of the casting room 1, the height of the partitions 1.1 is not less than 350 mm, and an air distribution component 9 is provided below the partitions 8. In this embodiment, the air inlet area of ​​the casting room is formed into a static pressure box chamber structure through the partitions, and the air distribution component can form a uniform air distribution for the casting.

[0032] Preferably, as attached Figure 3 As shown, the air distribution assembly 9 is composed of a diamond-shaped steel mesh 9.1 and a 100-mesh steel wire mesh 9.2, and the steel mesh is fixedly laid on the upper surface of the steel wire mesh.

[0033] Preferably, the air supply device 2 and the exhaust device 5 of this embodiment both use variable frequency fans. This design can effectively adjust the air supply volume and exhaust volume. It is convenient to control the air supply volume to be less than the exhaust volume, and the working channel is used as a channel for balancing the air volume to achieve laminar ventilation in the casting room, and the height of pollutants can be controlled by adjusting the air supply and exhaust air volumes.

[0034] Preferably, as attached Figure 1 As shown, the diameter of the exhaust duct 4 increases from the blind end to the exhaust end, and this design makes the exhaust duct have the characteristic of uniform exhaust. Further, the exhaust end of the exhaust duct 4 is provided with a pressure sensor 10, which can detect the pressure of the exhaust duct through the pressure sensor, and perform frequency conversion adjustment on the exhaust device through pressure changes. This control process can be realized by a PLC controller.

[0035] Preferably, as attached Figure 1 As shown, a multi-leaf split regulating valve 11 is provided on the exhaust branch pipe connecting the exhaust port 1.2 and the exhaust duct 4, so as to facilitate the adjustment of the exhaust volume of the exhaust port.

[0036] In specific implementation, the air supply device can be frequency-controlled according to the flow pattern of the polluted airflow, and the air supply volume can be controlled to be 50% less than the exhaust volume, so that the upper body of the production worker is in the clean area. The specific operation can adjust the air supply volume according to the actual situation, and it only needs to control the pollutants to be located at the lower part of the worker's body.

[0037] Embodiment 2

[0038] On the basis of the first embodiment, this embodiment further provides a cooling device on the air inlet side of the air supply device, and the cooling device is a wet curtain device, a spray device, or an air conditioning device. Specifically, the wet curtain device, the spray device, or the air conditioning device is provided on the air inlet side of the air supply device, and the air inlet of the air supply fan is cooled by the wet curtain device, the spray device, or the air conditioning device before being sent into the casting room by the air supply device.

[0039] It is worth noting that the wet curtain device or the spray device or the air-conditioning device in this embodiment are all direct applications of the prior art and will not be elaborated here. They can be directly purchased and installed externally, and are intended to cool the surrounding air on the air inlet side of the air supply device. The present application may not include a cooling device, which does not affect the use of the technical solution of the present application.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A ventilation device for metallurgical manual sand casting, characterized in that: It comprises a closed casting room provided with a working channel, a plurality of air supply ports provided on the top of the casting room, an air supply duct connected to each of the air supply ports, an air supply device connected to the air supply duct, a plurality of air exhaust ports provided on the side of the casting room, an air exhaust duct connected to each of the air exhaust ports, and an air exhaust device connected to the air exhaust duct; The inner wall of the top plate of the casting room is used to separate each of the air supply ports by a plurality of partitions, and an air distribution component is provided below the partition.

2. The ventilation device for metallurgical manual sand casting according to claim 1, characterized in that: The air distribution assembly is composed of a diamond-shaped steel wire mesh and a 100-mesh steel wire mesh, and the steel wire mesh is fixedly laid on the upper surface of the steel wire mesh.

3. The ventilation device for metallurgical manual sand casting according to claim 1, characterized in that: The height of the partition is not less than 350 mm.

4. The ventilation device for metallurgical manual sand casting according to claim 1, characterized in that: The casting room is welded with light steel, and the working channel and the exhaust port are arranged along the length direction of the casting room.

5. The ventilation device for metallurgical manual sand casting according to claim 1, characterized in that: A multi-leaf split regulating valve is arranged on the exhaust branch pipe connecting the exhaust port and the exhaust duct.

6. The ventilation device for metallurgical manual sand casting according to claim 5, characterized in that: The caliber of the exhaust duct increases from the blind end to the exhaust end, and a pressure sensor is provided at the exhaust end of the exhaust duct.

7. The ventilation device for metallurgical manual sand casting according to claim 1, characterized in that: The air supply device and the air exhaust device both adopt variable frequency fans.

8. The ventilation device for metallurgical manual sand casting according to any one of claims 1 to 7, characterized in that: The air inlet end and the air outlet end of the exhaust device are also provided with a waste gas treatment device and an exhaust pipe respectively.

9. The ventilation device for metallurgical manual sand casting according to any one of claims 1 to 7, characterized in that: The air inlet side of the air supply device is also provided with a cooling device, and the cooling device is a wet curtain device, a spray device or an air conditioning device.

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