Tail gas collecting system of multiple core making machines

Abstract

The utility model relates to the technical field of tail gas collection of core making machines, in particular to a tail gas collection system for multiple core making machines, which comprises a plurality of folding screens, a plurality of pipeline groups and a main pipeline. The multiple core making machines are arranged in the multiple folding screens respectively, each pipeline set corresponds to one core making machine, each pipeline set comprises a branch pipe, a first branch pipe, a second branch pipe, a branch pipe valve, a branch pipe valve and a draught fan, one end of each first branch pipe and one end of each second branch pipe are communicated with the branch pipe, the other end of each first branch pipe is communicated with an inner cavity of the corresponding folding screen, and the other end of each second branch pipe is communicated with an inner cavity of the corresponding folding screen. The other end of the second branch pipe is communicated with the closed bottom frame of the core box, the branch pipe valve and the fan are arranged on the branch pipes, the branch pipe valve is arranged on the first branch pipe, and the branch pipes are communicated with the tail gas treatment device through the main pipeline. Each core making machine is provided with one fan, so that different requirements of different specifications of core making machines and different stages for the air draft amount can be met, air volume adjustment is achieved, the situation that only one fan is arranged to run at the maximum power all the time is avoided, and energy saving is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas collection of core making machines, in particular to a tail gas collection system for multiple core making machines. Background Art

[0002] During the process of manufacturing sand cores, harmful waste gases (volatile organic compounds generated by catalysts and resin binders) will be generated inside the core making machines, and the tail gas needs to be collected and treated. In the prior art, a set of tail gas treatment devices is used to treat the tail gas of multiple core making machines. However, during operation, in order to achieve the effective effect of pumping tail gas from multiple core making machines, the exhaust fan configured in the tail gas treatment device needs to operate at the maximum exhaust power, which is not energy-saving. Moreover, once the exhaust fan is damaged, the tail gas of multiple core making machines cannot be collected, affecting the overall production progress. In addition, different specifications of core making machines require different exhaust air volumes, and the exhaust air volume requirements of the same core making machine are also different at different stages. Using a high-power exhaust fan cannot output reasonable air volumes at different stages of different core making machines. Content of the Utility Model

[0003] The purpose of the utility model is to provide a tail gas collection system for multiple core making machines, which can meet the exhaust air volume requirements of different specifications of core making machines at different stages and can save energy.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Provide a tail gas collection system for multiple core making machines, including:

[0006] A plurality of enclosures, and multiple core making machines are respectively arranged in the plurality of enclosures;

[0007] A plurality of pipeline groups, each pipeline group corresponds to one of the core making machines, and each pipeline group includes a main pipe, a first branch pipe, a second branch pipe, a main pipe valve, a branch pipe valve and a fan. One end of each of the first branch pipe and the second branch pipe is communicated with the main pipe, the other end of the first branch pipe is communicated with the inner cavity of the enclosure, the other end of the second branch pipe is communicated with the sealed bottom frame of the core box of the core making machine, the main pipe valve and the fan are both arranged on the main pipe, and the branch pipe valve is arranged on the first branch pipe;

[0008] A main pipeline, and the plurality of main pipes are all communicated with a tail gas treatment device through the main pipeline.

[0009] Optionally, a wind speed detection device is arranged on the main pipe of each pipeline group to detect the wind speed in the main pipe.

[0010] Optionally, the second branch pipe communicates with the sub - pipe through the first branch pipe, and the second branch pipe communicates with the downstream lumen of the first branch pipe where the branch valve is provided.

[0011] Optionally, it further includes a controller, and the controller is communicatively connected to multiple core - making machines, multiple sub - pipe valves, multiple branch valves, and multiple blowers.

[0012] Optionally, multiple first branch pipes are provided, and the multiple first branch pipes are respectively communicated with different positions in the inner cavity of the screen.

[0013] Optionally, the branch valve includes a partition plate, the partition plate is rotatably arranged in the first branch pipe, and the partition plate can rotate to a position where its plate surface is perpendicular to the axial direction of the first branch pipe to block the first branch pipe.

[0014] Optionally, the branch valve further includes a rotating shaft, a connecting rod mechanism, and a driving member. One end of the rotating shaft is connected to the partition plate, the other end is hinged to one end of the connecting rod mechanism, and the other end of the connecting rod mechanism is hinged to the output end of the driving member, so that the driving member can drive the rotating shaft and the partition plate to rotate through the connecting rod mechanism.

[0015] Optionally, an auxiliary blower is further provided on the main pipeline.

[0016] Optionally, a switch door is provided on the screen, and the collection position of the first branch pipe in the screen is close to the side wall of the screen opposite to the switch door.

[0017] Optionally, the blower is a variable - frequency blower.

[0018] Advantages of the present utility model:

[0019] The present utility model provides an exhaust gas collection system for multiple core - making machines, including multiple screens, multiple pipeline groups, and a main pipeline. Among them, multiple core - making machines are respectively arranged in multiple screens. Each pipeline group corresponds to one core - making machine, and each pipeline group includes a sub - pipe, a first branch pipe, a second branch pipe, a sub - pipe valve, a branch valve, and a blower. One end of each of the first branch pipe and the second branch pipe communicates with the sub - pipe, the other end of the first branch pipe communicates with the inner cavity of the screen, the other end of the second branch pipe communicates with the sealed bottom frame of the core box of the core - making machine, the sub - pipe valve and the blower are both arranged on the sub - pipe, and the branch valve is arranged on the first branch pipe. Multiple sub - pipes are all communicated with the exhaust gas treatment device through the main pipeline. Setting one blower for each core - making machine can meet the different requirements for the extraction air volume of different - specification core - making machines and different stages, realize air volume adjustment, avoid the situation that only one blower always operates at the maximum power, and achieve energy conservation. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an exhaust gas collection system for multiple core making machines provided in an embodiment of the utility model;

[0021] Figure 2 It is a partial assembly diagram of the branch pipe valve and the first branch pipe provided in the embodiment of the utility model.

[0022] In the figure:

[0023] 1. Screen; 11. Open and close the door;

[0024] 2. Branch; 3. First branch; 4. Second branch; 5. Branch valve;

[0025] 6. branch valve; 61. partition; 62. rotating shaft; 63. connecting rod mechanism; 64. driving member;

[0026] 7. Fan; 8. Main pipe; 9. Wind speed detection device;

[0027] 100. core box; 200. exhaust gas treatment device. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] likeFigure 1 - Figure 2 As shown in the figure, the tail gas collection system of multiple core-making machines in this embodiment includes multiple enclosures 1, multiple pipeline groups, and a main pipeline 8. Among them, multiple core-making machines are respectively arranged in multiple enclosures 1. Each pipeline group corresponds to one core-making machine. Each pipeline group includes a sub-pipeline 2, a first branch pipe 3, a second branch pipe 4, a sub-pipeline valve 55, a branch pipe valve 6, and a fan 7. One end of each of the first branch pipe 3 and the second branch pipe 4 is connected to the sub-pipeline 2. The other end of the first branch pipe 3 is connected to the inner cavity of the enclosure 1. The other end of the second branch pipe 4 is connected to the sealed bottom frame of the core box 100 of the core-making machine. The sub-pipeline valve 5 and the fan 7 are both arranged on the sub-pipeline 2, and the branch pipe valve 6 is arranged on the first branch pipe 3. Optionally, the fan 7 is a variable-frequency fan. Multiple sub-pipelines 2 are all connected to the tail gas treatment device 200 through the main pipeline 8. That is, the tail gas in the enclosure 1 can enter the tail gas treatment device 200 successively through the first branch pipe 3, the sub-pipeline 2, and the main pipeline 8, and the tail gas in the core box 100 can enter the tail gas treatment device 200 successively through the second branch pipe 4, the sub-pipeline 2, and the main pipeline 8. The core box 100 can release harmful waste gas with a relatively high concentration during the core-making blowing stage. Setting the second branch pipe 4 can centrally collect the tail gas in the core box 100. The volume of the core box 100 is much smaller than the volume of the enclosure 1. Compared with releasing this part of the tail gas into the inner cavity of the enclosure 1 and then collecting it, the method of setting the second branch pipe 4 is more energy-efficient.

[0032] Setting one fan 7 for each core-making machine can not only meet the different requirements of core-making machines of different specifications for the air extraction volume, but also meet the different requirements of the same core-making machine for the air extraction volume in different core-making stages, realizing precise adjustment of the air volume, improving the tail gas collection efficiency, avoiding the situation where only one fan 7 always runs at the maximum power, and achieving energy conservation.

[0033] Optionally, a wind speed detection device 9 is arranged on the sub-pipeline 2 of each pipeline group to detect the wind speed in the sub-pipeline 2. Setting the wind speed detection device 9 has at least two functions. One is that during the simulated operation of the fan 7, according to the results detected by the wind speed detection device 9, the most suitable operating power range of the fan 7 for each core-making machine in different core-making stages can be specified. That is, the wind speed detection device 9 can assist in setting the preset power of the fan 7. Another function of the wind speed detection device 9 is that during the actual core-making process, through the result of the wind speed detection device 9, that is, the real-time wind speed in the sub-pipeline 2, it can be verified whether the operation of each pipeline group is normal, whether the fan 7 is turned on, and whether the actual air extraction wind speed is consistent with the set power of the fan 7. If any abnormality is found, an alarm device can be connected to send an alarm in the first time to remind the staff, so as to avoid the situation that harmful tail gas cannot be collected and treated in time.

[0034] Optionally, the second branch pipe 4 is connected to the sub-branch pipe 2 through the first branch pipe 3, and the second branch pipe 4 is connected to the downstream lumen of the first branch pipe 3 where the branch valve 6 is provided. That is, when the branch valve 6 is closed, the power provided by the fan 7 will all be used for collecting the tail gas in the core box 100, further improving the collection efficiency of the tail gas in the core box 100.

[0035] Optionally, it further includes a controller which is communicatively connected to multiple core-making machines, multiple sub-branch valves 5, multiple branch valves 6, and multiple fans 7. Optionally, the controller is also communicatively connected to the above-mentioned wind speed detection device 9 and alarm device. The controller can control the power of the corresponding fan 7, as well as the opening and closing of the corresponding sub-branch valve 5 and branch valve 6 according to the different core-making processes of each core-making machine, realizing efficient linkage control, maximizing the efficiency of tail gas collection, and reducing energy consumption. In this embodiment, the controller can be a single independent single-chip microcomputer, or can be composed of multiple distributed single-chip microcomputers. A control program can run in the single-chip microcomputer, and then according to the different core-making processes of each core-making machine, control the power of the corresponding fan 7, as well as the opening and closing of the corresponding sub-branch valve 5 and branch valve 6. It is known that configuring a controller belongs to conventional technical means and will not be elaborated here.

[0036] Optionally, there are multiple first branch pipes 3, and the multiple first branch pipes 3 are respectively connected to different positions in the inner cavity of the shroud 1, so that the tail gas collection speed at each part of the inner cavity of the shroud 1 is more balanced, avoiding the situation that the concentration of harmful gases is too high in a local area of the shroud 1.

[0037] Optionally, a switch door 11 is provided on the shroud 1 to facilitate opening the shroud 1. Since air enters at the switch door 11, the collection position of the first branch pipe 3 in the inner cavity of the shroud 1 is close to the side wall of the shroud 1 opposite to the switch door 11, that is, far from the switch door 11. That is, the tail gas collection positions of the multiple first branch pipes 3 are all close to the rear inner wall surface of the shroud 1. Such a setting helps to collect all the tail gas in the shroud 1. Of course, in other embodiments, the tail gas collection positions of the multiple first branch pipes 3 can be adjusted according to the position where the switch door 11 is opened.

[0038] As Figure 2 shown, optionally, the branch valve 6 includes a partition plate 61. The partition plate 61 is rotatably arranged in the first branch pipe 3, and the partition plate 61 can rotate to make its plate surface perpendicular to the axial direction of the first branch pipe 3 to block the first branch pipe 3, so that the fan 7 mainly sucks the tail gas in the core box 100. The partition plate 61 can also rotate to not block the first branch pipe 3, so that the fan 7 sucks the tail gas in the shroud 1 at the same time.

[0039] To achieve the automatic adjustment of the rotation of the partition plate 61, optionally, the branch pipe valve 6 further includes a rotating shaft 62, a link mechanism 63, and a driving member 64. One end of the rotating shaft 62 is connected to the partition plate 61, and the other end is hinged to one end of the link mechanism 63. The other end of the link mechanism 63 is hinged to the output end of the driving member 64, so that the driving member 64 can drive the rotating shaft 62 and the partition plate 61 to rotate through the link mechanism 63. Optionally, both the link mechanism 63 and the driving member 64 are located outside the first branch pipe 3, so the other end of the rotating shaft 62 passes through the through hole on the outer wall of the first branch pipe 3 and is hinged to one end of the link mechanism 63.

[0040] Optionally, the link mechanism 63 includes a first rod and a second rod that are hinged to each other. The other end of the first rod is hinged to the rotating shaft 62, and the other end of the second rod is hinged to the output end of the driving member 64. Optionally, the driving member 64 is a cylinder. When the driving member 64 pushes one end of the second rod to move, the angle between the first rod and the second rod changes, and the end of the first rod away from the second rod drives the rotating shaft 62 to rotate, and the partition plate 61 rotates accordingly.

[0041] Optionally, the cylinder is communicatively connected to the controller so that the cylinder can act in real time according to the commands of the controller to open or block the first branch pipe 3 with the partition plate 61.

[0042] If the main pipeline 8 is relatively long, optionally, an auxiliary fan is further provided on the main pipeline 8 to provide auxiliary power to ensure that the tail gas quickly enters the tail gas treatment device 200.

[0043] The control method of the tail gas collection system of the above-mentioned multiple core-making machines includes:

[0044] The controller independently controls the air extraction state of each core-making machine, that is, according to the different specifications and different core-making processes of each core-making machine, the operating power of the fan 7 of each core-making machine, and the opening and closing of the branch pipe valves 5 and the branch pipe valves 6 can be adjusted in real time.

[0045] When the core-making machine is in the preparatory stage, the controller controls the corresponding fan 7 to operate at a first preset frequency so that both the first branch pipe 3 and the second branch pipe 4 are in a negative pressure state. The first preset frequency is a low frequency, and can be specifically set according to parameters such as the specifications of the core-making machine.

[0046] When the core-making machine is in the core-making air-blowing stage, the core box 100 is in a closed state at this time, that is, the core box 100 is not connected to the screen 1. At this time, the controller controls the corresponding fan 7 to operate at a second preset frequency, and the second preset frequency is higher than the first preset frequency, and closes or semi-opens a plurality of branch valves 6 corresponding to the core-making machine. Of course, the branch valve 6 has at least two states: fully open and semi-open. At this time, all the power of the fan 7 is used to suck the harmful exhaust gas with a higher concentration in the core box 100, which can ensure the suction efficiency. The second preset frequency is the intermediate frequency, and can be specifically set according to parameters such as the specifications of the core-making machine.

[0047] When the core-making machine is in the core-making non-air-blowing stage, the core box 100 is in an open state at this time, that is, the core box 100 is connected to the screen 1. At this time, the controller controls a plurality of branch valves 6 corresponding to the core-making machine to open. If the corresponding screen 1 door is closed, the controller controls the corresponding fan 7 to operate at a third preset frequency, and the third preset frequency is higher than the first preset frequency. The third preset frequency is the intermediate frequency, and can be specifically set according to parameters such as the specifications of the core-making machine. If the corresponding screen 1 door is open, in order to prevent the exhaust gas from leaking from the inside of the screen 1 to the outside of the screen 1, the controller controls the corresponding fan 7 to operate at a fourth preset frequency, and the fourth preset frequency is higher than the third preset frequency. The fourth preset frequency is the high frequency, and can be specifically set according to parameters such as the specifications of the core-making machine. That is, through high-frequency suction, it can be ensured that no harmful exhaust gas leaks outside the screen 1.

[0048] Optionally, the control method further includes that when the core-making machine is in the core-making interval stage, that is, after one core-making is completed and waiting to start the next core-making, if the interval duration reaches the first preset duration, the controller controls the corresponding fan 7 to operate at the first preset frequency, that is, the fan 7 enters the frequency-down energy-saving state. If the interval duration is further extended to reach the second preset duration, and the second preset duration is greater than the first preset duration, the controller controls the corresponding fan 7 to stop, which is defaulted that the core-making work is temporarily ended.

[0049] The exhaust gas collection system of the above-mentioned multiple core-making machines can meet the different air extraction volume requirements of core-making machines with different specifications by applying this control method, and can also meet the different air extraction volume requirements of the same core-making machine at different core-making stages, realizing precise adjustment of the air volume, improving the exhaust gas collection efficiency, avoiding the situation where only one fan 7 always operates at the maximum power, and achieving energy conservation. Moreover, the air extraction state of each core-making machine can be precisely controlled according to the core-making process of each core-making machine, effectively improving the effectiveness and real-time nature of the control, and contributing to improving the production efficiency. The fan 7 is designed close to the core-making machine, which also minimizes the pipeline air resistance in the front section and reduces the power consumption of the entire exhaust gas collection system. Even if a single fan 7 is damaged, the other core-making machines can still produce, and the core-making of the entire production line is not affected by the exhaust gas extraction. Centralized air extraction is carried out for the core box 100, which can effectively improve the exhaust gas collection effect and reduce the exhaust gas volume inside the screen 1. The exhaust gas collection system of the multiple core-making machines can also reduce the requirements for the air extraction capacity of the supporting external exhaust gas treatment device 200, avoiding high environmental protection supporting investments.

[0050] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. The tail gas collection system of multiple core making machines is characterized by: include: A plurality of enclosures (1), wherein a plurality of core making machines are respectively arranged in the plurality of enclosures (1); A plurality of pipeline groups, each pipeline group corresponds to one of the core making machines, each pipeline group comprises a branch pipe (2), a first branch pipe (3), a second branch pipe (4), a branch pipe valve (5), a branch pipe valve (6) and a fan (7), one end of each of the first branch pipe (3) and the second branch pipe (4) is connected to the branch pipe (2), the other end of the first branch pipe (3) is connected to the inner cavity of the enclosure (1), the other end of the second branch pipe (4) is connected to the sealed bottom frame of the core box (100) of the core making machine, the branch pipe valve (5) and the fan (7) are both arranged on the branch pipe (2), and the branch pipe valve (6) is arranged on the first branch pipe (3); A main pipe (8), wherein the plurality of branch pipes (2) are connected to the exhaust gas treatment device (200) through the main pipe (8).

2. The tail gas collection system for multiple core making machines according to claim 1, characterized in that: A wind speed detection device (9) is provided on the branch pipe (2) of each pipeline group to detect the wind speed in the branch pipe (2).

3. The tail gas collection system for multiple core making machines according to claim 1, characterized in that: The second branch pipe (4) is connected to the branch pipe (2) through the first branch pipe (3), and the second branch pipe (4) is connected to the downstream lumen of the first branch pipe (3) where the branch pipe valve (6) is arranged.

4. The tail gas collection system for multiple core making machines according to claim 1, characterized in that: It also includes a controller, which is communicatively connected with the plurality of core making machines, the plurality of branch valves (5), the plurality of branch valves (6), and the plurality of fans (7).

5. The tail gas collection system for multiple core making machines according to any one of claims 1 to 4, characterized in that: A plurality of the first branch pipes (3) are provided, and the plurality of the first branch pipes (3) are respectively connected to different positions of the inner cavity of the enclosure (1).

6. The tail gas collection system for multiple core making machines according to any one of claims 1 to 4, characterized in that: The branch pipe valve (6) comprises a partition plate (61), which is rotatably arranged in the first branch pipe (3). The partition plate (61) can be rotated until its plate surface is perpendicular to the axial direction of the first branch pipe (3) to block the first branch pipe (3).

7. The tail gas collection system for multiple core making machines according to claim 6, characterized in that: The branch pipe valve (6) further comprises a rotating shaft (62), a connecting rod mechanism (63) and a driving member (64); one end of the rotating shaft (62) is connected to the partition (61), and the other end is hinged to one end of the connecting rod mechanism (63); the other end of the connecting rod mechanism (63) is hinged to the output end of the driving member (64), so that the driving member (64) can drive the rotating shaft (62) and the partition (61) to rotate through the connecting rod mechanism (63).

8. The tail gas collection system for multiple core making machines according to any one of claims 1 to 4, characterized in that: The main pipe (8) is also provided with an auxiliary fan.

9. The tail gas collection system for multiple core making machines according to any one of claims 1 to 4, characterized in that: The enclosure (1) is provided with a switch door (11), and the collection position of the first branch pipe (3) inside the enclosure (1) is close to the side wall of the enclosure (1) opposite to the switch door (11).

10. The tail gas collection system for multiple core making machines according to any one of claims 1 to 4, characterized in that: The fan (7) is a variable frequency fan.

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