Movable pit large resin sand casting pouring cooling smoke dust treatment system

Abstract

The utility model relates to the technical field of casting dust removal, in particular to a movable pit pouring cooling smoke dust treatment system for a large resin sand casting, which is characterized by comprising a track, a dust removal device and a dust removal device, the travelling crane mechanism is arranged on the track and is used for moving on the track in a reciprocating manner so as to be respectively close to different casting molds placed in a pit; the smoke dust treatment mechanism is fixedly arranged on the travelling crane mechanism and is used for treating smoke dust; and the smoke dust collecting mechanism is arranged on the traveling mechanism and located above the pouring casting mold, the smoke dust collecting mechanism is connected with the smoke dust treatment mechanism and used for sucking the smoke dust into the smoke dust treatment mechanism, the smoke dust, sparks and harmful gas can be accurately collected, and then atmospheric emission pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casting dust removal, in particular to a mobile pit large resin sand casting pouring cooling smoke treatment system. Background Art

[0002] Resin Sand Casting is a casting process that uses resin as a binder. It is mainly used to manufacture complex-shaped and high-precision metal castings. Currently, phenolic resin and self-hardening furan resin sand molding are widely used in the industry. They can effectively shorten the production cycle and improve production efficiency. They can also improve the appearance quality of castings and are widely used in the foundry industry.

[0003] However, during the pouring and cooling of resin sand molds, a large amount of dust and smoke are generated, and very strong smoke and odor are emitted. Due to the baking of high-temperature molten iron, the smoke components include not only smoke and CO, SO2, H25, ammonia, cyanide, benzene and polycyclic aromatic hydrocarbons, but also resin volatiles with high viscosity. These resin volatiles mixed with smoke will produce highly sticky and flammable black greasy substances. Therefore, smoke needs to be collected and treated during operations in the pouring and cooling area.

[0004] At present, in the process of smoke dust treatment, a fixed smoke dust collection hood device is usually used, which is installed and covered above the casting mold of the production line, and the smoke dust collection hood device is connected to the treatment device through a pipeline, and the smoke dust is sucked in and then treated harmlessly by sedimentation.

[0005] However, for some large castings made of resin sand, the current processing equipment has major drawbacks. Among them, large casting molds are large in size. In order to facilitate pouring and meet safety requirements, a pit is usually set up on the ground. The casting mold is then hoisted in the pit and poured and cooled. This setting method is more convenient and safer, and is currently the main casting arrangement method; but because the casting molds are of different sizes, the positions of the casting molds are not fixed when they are placed. This will cause the existing smoke collection devices to be unable to accurately collect smoke, resulting in emissions that do not meet standards and pollute the atmosphere. Therefore, controlling the smoke and harmful gases generated during the pouring and cooling of large pieces is a difficult problem in the foundry industry, especially in the production process of large castings.

[0006] Therefore, there is a need to improve the existing technology.

[0007] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Utility Model Content

[0008] The utility model provides a mobile pit large resin sand casting cooling smoke and dust treatment system to solve the problems existing in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solutions:

[0010] A mobile pit large resin sand casting cooling smoke and dust treatment system, comprising:

[0011] a track, set adjacent to the pit;

[0012] A traveling mechanism is provided on the track and is used for reciprocating on the track to approach different casting molds placed in the pit respectively;

[0013] A smoke and dust processing mechanism is fixedly arranged on the traveling mechanism and is used to process the smoke and dust;

[0014] and a smoke dust collecting mechanism, which is provided on the traveling mechanism and located above the casting mold; the smoke dust collecting mechanism is connected to the smoke dust processing mechanism and is used for sucking smoke into the smoke dust processing mechanism.

[0015] Preferably, the smoke and dust collection mechanism includes:

[0016] A dust collection hood located above the pouring mold;

[0017] A fan module is arranged in the dust collecting hood;

[0018] and a dust collecting pipe, which is respectively connected to the dust collecting hood and the smoke processing mechanism, and the fan module is used to suck the smoke from the dust collecting hood to the dust collecting pipe.

[0019] Preferably, the smoke treatment mechanism includes:

[0020] a housing having a processing chamber therein;

[0021] A spray assembly is provided inside the spray assembly and is used to spray smoke and dust in the processing chamber;

[0022] and a filter assembly, wherein the shell is provided with an air vent, and the filter assembly is arranged on the shell and located in the air vent for processing the gas.

[0023] Preferably, the spray assembly includes:

[0024] a spray pipe, disposed on the housing and located on the top of the housing;

[0025] a spray pump connected to the spray pipe and used to pump water into the spray pipe;

[0026] and a spray head, which is arranged on the spray pipe and communicated with the spray pipe and is used for spraying mist water.

[0027] Preferably, the filter assembly includes a filter mesh layer, an activated carbon layer and a deodorizing layer that are stacked.

[0028] Preferably, it also includes a sewage discharge module, which includes:

[0029] a sewage pipe, one end of which is connected to the bottom of the shell and communicates with the processing chamber;

[0030] and a sewage pump connected to the other end of the sewage pipe for pumping sewage out of the interior of the treatment chamber.

[0031] Preferably, the driving mechanism includes:

[0032] A base, wherein the smoke processing mechanism and the smoke collecting mechanism are respectively arranged on the base;

[0033] The wheel body is rotatably arranged on the base and rolls with the track;

[0034] and a power source connected to the wheel body for driving the wheel body to rotate.

[0035] Preferably, the driving mechanism further includes an extension rod, the extension rod is rotatably arranged on the base, and the smoke and dust collecting mechanism is arranged on the base through the extension rod.

[0036] Preferably, the number is set to two groups, and they are located on opposite sides of the pit.

[0037] Preferably, it further comprises an audible and visual alarm device, which is arranged on the driving mechanism.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The utility model provides a mobile pit large resin sand casting cooling smoke treatment system, which is aimed at large casting molds. In the process of collecting and treating the smoke, the system first slides on the track through the traveling mechanism, and then drives the smoke collection mechanism to move accurately to the top of the casting mold. At this time, the smoke collection mechanism can collect the smoke generated in the pouring and cooling process into the smoke treatment mechanism, and treat the smoke and harmful gases through the smoke treatment mechanism. In this process, the structure is flexible and can accurately collect smoke and gas to ensure that the emission meets the standard, which well solves the problems existing in the prior art.

[0040] The present invention has other features and advantages, which will be apparent from the accompanying drawings and subsequent detailed descriptions incorporated herein, or will be described in detail in the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a structural diagram of a mobile pit large resin sand casting cooling smoke and dust treatment system provided by a preferred embodiment of the utility model;

[0043] Figure 2 This is a structural diagram of a smoke processing mechanism and a smoke collecting mechanism provided by a preferred embodiment of the present invention;

[0044] Figure 3 This is a structural schematic diagram of a smoke and dust treatment mechanism provided by a preferred embodiment of the present invention from another perspective;

[0045] Figure 4 It is a cross-sectional view of a smoke treatment mechanism provided by a preferred embodiment of the present utility model.

[0046] Reference numerals:

[0047] 1. Track; 2. Traveling mechanism; 21. Base; 22. Wheel body; 23. Power source; 24. Extension rod; 3. Smoke and dust treatment mechanism; 31. Housing; 32. Spray assembly; 321. Spray pipe; 322. Spray pump; 323. Spray head; 33. Filter assembly; 331. Filter mesh layer; 332. Activated carbon layer; 333. Deodorization layer; 34. Sewage module; 341. Sewage pipe; 342. Sewage pump; 4. Smoke and dust collection mechanism; 41. Dust hood; 42. Fan module; 43. Dust collection pipe; 5. Sound and light alarm device. DETAILED DESCRIPTION

[0048] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be a centrally located component.

[0050] In addition, the terms "long", "short", "inside", "outside", etc. that indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientation structure, and should not be understood as a limitation of the present invention.

[0051] The following is combined with Figure 1-4 The technical solution of the utility model is further illustrated through specific implementation methods.

[0052] Reference Figure 1 and Figure 2 This embodiment discloses a mobile underground large-scale resin sand casting cooling smoke treatment system, which includes a track 1, a traveling mechanism 2, a smoke treatment mechanism 3 and a smoke collection mechanism 4.

[0053] Among them, the track 1 is installed on the ground and is arranged adjacent to the pit; wherein, during the casting process, the casting mold needs to be hoisted in the pit first. In this embodiment, preferably, multiple casting molds are placed in the pit along a straight line. On this basis, the track 1 is arranged parallel to the ground along the arrangement direction of the multiple casting molds.

[0054] Based on the above-mentioned arrangement, the traveling mechanism 2 is arranged on the track 1, and the traveling mechanism 2 is used to move back and forth on the track 1 so as to approach different casting molds placed in the pit respectively. At the same time, the smoke collection mechanism 4 and the smoke treatment mechanism 3 are respectively fixedly mounted on the traveling mechanism 2. Driven by the traveling mechanism 2, the smoke treatment mechanism 3 and the smoke collection mechanism 4 can be accurately approached to different casting molds. At this time, the smoke collection mechanism 4 is connected to the smoke treatment mechanism 3, and the smoke collection mechanism 4 is used to suck smoke, sparks and harmful gases into the smoke treatment mechanism 3, and the smoke treatment mechanism 3 is used to treat the smoke.

[0055] In the above scheme, smoke and harmful gases can be sucked out, the structure is flexible and easy to adjust; and, driven by the traveling mechanism 2, the position accuracy during suction can be improved according to the actual placement of the casting mold to reduce the overflow of smoke and harmful gases, making it more environmentally friendly and reliable when used.

[0056] Reference Figure 3 To achieve the position adjustment function, the driving mechanism 2 includes a base 21, wheels 22, and a power source 23. In this embodiment, the base 21 is a seat plate-like structure, arranged horizontally and located directly above the track 1. There are four wheels 22, which are arranged in a rectangular pattern on opposite sides of the base 21. A transmission shaft is installed between two wheels 22 located on different sides but opposite to each other, and a bearing seat for rotatably mounting the transmission shaft is provided at the bottom of the base 21. The wheels 22 are rotatably mounted on the base 21. Furthermore, the wheels 22 are in rolling engagement with the track 1, and can guide the base 21 to move along the track 1.

[0057] Furthermore, the power source 23 is connected to the wheel body 22 for driving the wheel body 22 to rotate. In this embodiment, the power source 23 adopts a motor mechanism capable of outputting forward rotation and reverse rotation, such as a servo motor. The servo motor can provide a precise output angle to control the base 21 to stay precisely on the track 1, which well meets the working conditions. During the specific installation, the power source 23 can be fixedly installed on the base 21, and a pair of mutually meshing gears can be installed at the transmission shaft and the output shaft of the power source 23. At this time, by controlling the start and stop of the power source 23, the transmission shaft and the wheel body 22 can be driven to rotate, thereby realizing the automatic travel function. The structural automation level is good, and the position adjustment is efficient and accurate.

[0058] It should be noted that, in other embodiments, a belt drive method can also be used between the power source 23 and the wheel body 22, which can have an impact-resistant effect and a longer structural life; in addition, the power source 23 can also be adjusted to a hydraulic motor or other types of motor structures according to actual needs. Any structure that can output torque can be tried, and no specific restrictions are made here.

[0059] Reference Figure 4 In order to process smoke and harmful gases, the smoke treatment mechanism 3 includes a shell 31, a spray component 32 and a filter component 33, wherein the shell 31 is fixedly mounted on the base 21, the interior of the shell 31 is hollow, and forms a processing chamber, and an air inlet is provided at the top of the shell 31, and the shell 31 is connected to the smoke collection mechanism 4 through the air inlet.

[0060] Furthermore, a spray assembly 32 is arranged inside the spray assembly 32 for spraying smoke dust in the processing chamber; on the one hand, solid smoke dust will be adsorbed when encountering water droplets, and the water droplets will flow to the bottom of the shell 31 to form sewage, thereby realizing the treatment of smoke dust; on the other hand, in the process of pouring metal fluid into the casting mold, in addition to generating smoke dust and harmful gases, sparks and sparks may also be generated. At this time, the use of spraying can also extinguish the sparks and sparks.

[0061] Specifically, the spray assembly 32 includes a spray pipe 321, a spray pump 322, and a spray head 323. The spray pipe 321 is mounted on the inner wall of the housing 31 and located at the top of the housing 31. Optionally, the spray pipe 321 is arranged horizontally, with both ends spanning opposite sides of the housing 31. This allows the spray pipe 321 to cover the treatment chamber as much as possible, thereby increasing the water delivery distance. At the same time, the spray pump 322 is fixedly mounted on the outside of the housing 31 and is flange-connected to one end of the spray pipe 321. In this case, the spray pump 322 can be connected to a water source and pump water into the spray pipe 321.

[0062] In addition, there are multiple spray heads 323. Preferably, the spray heads 323 are mist spray heads 323. The specific number of spray heads 323 can be three, four or five, which can be adjusted according to actual needs and is not limited here. In this embodiment, the spray heads 323 are fixedly installed on the spray pipe 321. A connecting port is provided on the spray pipe 321. The spray heads 323 are connected to the spray pipe 321 through the connecting port, and the spray heads 323 are arranged vertically downward; under this setting, the water in the spray pipe 321 is driven by pressure to be sprayed out from the spray heads 323 in a mist spray manner, thereby absorbing dust and extinguishing sparks.

[0063] Furthermore, after the smoke is treated, water and dust impurities will settle at the bottom of the shell 31 to form sewage, in order to facilitate regular cleaning of the above-mentioned sediment; the smoke treatment mechanism 3 also includes a sewage discharge module 34, specifically, the sewage discharge module 34 includes a sewage pipe 341 and a sewage pump 342; wherein, one end of the sewage pipe 341 is fixedly connected to the bottom of the shell 31, and a sewage outlet is provided through the bottom of the shell 31, and the sewage pipe 341 is connected to the treatment chamber through the sewage outlet; at the same time, the sewage pump 342 is connected to the other end of the sewage pipe 341. At this time, the sewage pump 342 is started, and the sewage pump 342 can extract sewage from the inside of the treatment chamber, realizing the regular sewage discharge function, which is convenient to use.

[0064] Continue to refer to Figure 4 After the smoke and dust are processed, harmful gases are also sucked into the processing chamber. These harmful gases are removed by the filter assembly 33. Specifically, a ventilation port is provided on one side of the housing 31. The filter assembly 33 is provided on the housing 31 and located within the ventilation port. As the smoke and dust collection mechanism 4 continuously transports smoke and harmful gases to the housing 31, the harmful gases will continuously flow back into the atmosphere through the ventilation port. The filter assembly 33 is used to process the gas and remove the harmful components to meet emission requirements.

[0065] Specifically, in this embodiment, the filter assembly 33 includes a stacked filter mesh layer 331, an activated carbon layer 332 and a deodorizing layer 333. When specifically set up, a mounting frame can be used to achieve stacked installation, wherein two filter mesh layers 331 are set. First, one of the filter mesh layers 331 is fixedly installed on one side of the mounting frame and covers an opening on one side of the mounting frame. At this time, activated carbon is filled on the filter mesh layer 331; then the deodorizing layer 333 is installed and filled on the filter mesh layer 331. Preferably, the deodorizing layer 333 can use a UV photolysis element to decompose harmful gases by photolysis irradiation, thereby achieving a deodorizing effect; finally, the other filter mesh layer 331 is installed on the other side of the mounting frame to form a modular structure, and then the mounting frame is fixedly installed on the outer shell 31 to achieve installation; at this time, the activated carbon layer 332 and the deodorizing layer 333 can adsorb harmful substances and remove harmful gases.

[0066] Optionally, the mounting frame can be mounted on the housing 31 in a detachable manner, so as to facilitate regular replacement of the filter assembly 33 and maintain a good filtering effect.

[0067] Replay Figure 2In order to achieve the suction of smoke and harmful gases, the smoke collecting mechanism 4 is located above the casting mold. Before the suction action is performed, in order to realize the installation and setting of the smoke collecting mechanism 4, the driving mechanism 2 also includes an extension rod 24. The extension rod 24 includes a vertical section and a horizontal section connected to each other. The horizontal section is located at the top of the vertical section. The bottom end of the vertical section is rotatably mounted on the base 21 through a bearing. At this time, the extension rod 24 extends outward, and the smoke collecting mechanism 4 is fixedly mounted on the extension rod 24. At this time, the smoke collecting mechanism 4 is set on the base 21 through the extension rod 24.

[0068] On the one hand, the extension rod 24 can guide the smoke collection mechanism 4 to be set above the casting mold. On the other hand, the extension rod 24 arranged on the base 21 can also adjust the position of the smoke collection mechanism 4 by rotation. The smoke collection mechanism 4 can be fine-tuned according to actual conditions, so that the smoke collection mechanism 4 can be more accurately aligned with the casting mold.

[0069] On this basis, the smoke and dust collection mechanism 4 includes a dust hood 41, a fan module 42 and a dust collecting pipe 43; wherein, the dust hood 41 is fixedly installed on the horizontal section of the extension rod 24, and at this time the dust hood 41 is located above the casting mold, and the opening of the dust hood 41 is set vertically; the fan module 42 is installed on the dust hood 41 for suction. Specifically, the fan module 42 includes an impeller and a motor, the impeller is rotatably installed in the dust hood 41, the motor is fixedly installed in the dust hood 41, and the output shaft of the motor is fixedly connected to the impeller; under this setting condition, the motor can drive the impeller to rotate, thereby forming a pressure difference between the outside and inside of the dust hood 41, and finally forming an airflow.

[0070] In addition, the dust collecting pipe 43 is respectively connected to the dust collecting hood 41 and the smoke treatment mechanism 3. Specifically, the two ends of the dust collecting pipe 43 are connected to the dust collecting hood 41 and the top of the outer shell 31 through flange connections, and the dust collecting pipe 43 is connected to the treatment chamber through the air inlet. Under this setting, the fan module 42 can suck the smoke gathered in the dust collecting hood 41 into the dust collecting pipe 43, and the suction process is efficient.

[0071] Replay Figure 1 In order to improve the treatment efficiency of smoke and harmful gases, in this embodiment, the number of smoke treatment systems is set to two groups, and they are located on opposite sides of the pit, so that the overall treatment efficiency can be improved by alternating suction treatment. It can be understood that smoke and harmful gases need to go through two stages of pouring and cooling, and smoke and harmful gases will be generated in the above two stages. Generally, the smoke treatment time is 5 minutes when pouring large castings and 30 minutes when cooling. Therefore, the smoke treatment system needs to stay for at least 35 minutes to ensure that most of the smoke and harmful gases can be effectively treated.

[0072] Reference Figure 2 In order to improve the safety of on-site construction, the smoke and dust treatment system also includes an audible and visual alarm device 5, which is installed on the driving mechanism 2. During installation, the audible and visual alarm device 5 can be electrically connected to the PLC control system, and the PLC control system can be connected to the driving mechanism 2. When the driving mechanism 2 is operating, it will send an operation signal to the PLC control system. At this time, the PLC control system will send an alarm signal to the audible and visual alarm device 5. The audible and visual alarm device 5 generates an alarm sound and flashes lights based on the alarm signal to remind on-site personnel to avoid, thereby optimizing and improving the on-site construction safety.

[0073] The implementation principle of this embodiment is: according to the actual placement position of different casting molds, by adjusting the position of the traveling mechanism 2 on the track 1, the smoke collection mechanism 4 can be accurately moved to the top of the casting mold, and then the smoke gas can be accurately collected to ensure that the emission meets the standard.

[0074] So far, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mobile pit large resin sand casting cooling smoke treatment system, characterized in that: include: A track (1) is provided adjacent to the pit; A traveling mechanism (2) is arranged on the track (1) and is used for reciprocating on the track (1) to approach different casting molds placed in the pit; A smoke and dust processing mechanism (3) is fixedly arranged on the traveling mechanism (2) and is used for processing smoke and dust; and a smoke dust collecting mechanism (4), which is provided on the traveling mechanism (2) and located above the casting mold; the smoke dust collecting mechanism (4) is connected to the smoke dust processing mechanism (3) and is used to suck smoke into the smoke dust processing mechanism (3).

2. The mobile pit large resin sand casting cooling smoke treatment system according to claim 1 is characterized in that: The smoke and dust collecting mechanism (4) comprises: A dust collecting hood (41) is located above the casting mold; A fan module (42) is arranged on the dust collecting cover (41); and a dust collecting pipe (43) connected to the dust collecting hood (41) and the smoke handling mechanism (3) respectively; the fan module (42) is used to suck the smoke from the dust collecting hood (41) to the dust collecting pipe (43).

3. The mobile pit large resin sand casting cooling smoke treatment system according to claim 1 is characterized in that: The smoke treatment mechanism (3) comprises: a housing (31) having a processing chamber therein; a spray assembly (32), disposed inside the spray assembly (32), and configured to spray smoke and dust in the processing chamber; and a filter assembly (33); a vent is provided on the housing (31); the filter assembly (33) is arranged on the housing (31) and located in the vent for processing gas.

4. The mobile pit large resin sand casting cooling smoke treatment system according to claim 3 is characterized in that: The spray assembly (32) comprises: a spray pipe (321), arranged on the housing (31) and located at the top of the housing (31); a spray pump (322), connected to the spray pipe (321), for pumping water into the spray pipe (321); and a spray head (323) which is arranged on the spray pipe (321) and is in communication with the spray pipe (321) and is used for spraying mist water.

5. The mobile pit large resin sand casting cooling smoke treatment system according to claim 3 is characterized in that: The filter assembly (33) comprises a filter mesh layer (331), an activated carbon layer (332) and a deodorizing layer (333) which are stacked together.

6. The mobile underground large-scale resin sand casting cooling smoke and dust treatment system according to claim 3 is characterized in that: The system further comprises a sewage discharge module (34), wherein the sewage discharge module (34) comprises: a sewage pipe (341), one end of which is connected to the bottom of the housing (31) and communicates with the processing chamber; and a sewage pump (342) connected to the other end of the sewage pipe (341) for pumping sewage out of the interior of the treatment chamber.

7. The mobile underground large-scale resin sand casting cooling smoke and dust treatment system according to claim 1 is characterized in that: The driving mechanism (2) comprises: A base (21), the smoke processing mechanism (3) and the smoke collecting mechanism (4) are respectively arranged on the base (21); A wheel body (22) is rotatably mounted on the base (21) and is in rolling engagement with the track (1); and a power source (23) connected to the wheel body (22) for driving the wheel body (22) to rotate.

8. The mobile underground large-scale resin sand casting cooling smoke and dust treatment system according to claim 7 is characterized in that: The driving mechanism (2) further comprises an extension rod (24), the extension rod (24) being rotatably arranged on the base (21), and the smoke and dust collecting mechanism (4) being arranged on the base (21) via the extension rod (24).

9. The mobile underground large-scale resin sand casting cooling smoke and dust treatment system according to claim 1 is characterized in that: The number is set to two groups, and they are located on opposite sides of the pit.

10. The mobile underground large-scale resin sand casting cooling smoke and dust treatment system according to claim 1, characterized in that: It also includes an audible and visual alarm device (5), which is arranged on the driving mechanism (2).

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