Exhaust pipe assembly

Abstract

The utility model provides an exhaust pipe assembly. The exhaust pipe assembly comprises an air inlet section, a liquid collecting section and an air outlet section which are sequentially communicated. Wherein the air inlet section is provided with an air inlet, the air outlet section is provided with an air outlet, the middle part of the liquid collecting section is lower than the two end parts of the liquid collecting section, and a liquid outlet is arranged at the lowest part of the liquid collecting section. According to the technical scheme, accumulated liquid in the pipeline can be discharged in time during working, on one hand, exhaust air pressure and air volume attenuation caused by the fact that the accumulated liquid occupies the cross section of the pipeline can be prevented, so that the process fluctuation problem is solved, the possible product quality risk is reduced, and on the other hand, the pipeline can be prevented from being rusted. Compared with a traditional exhaust pipe, the exhaust pipe assembly provided by the utility model does not need to disassemble a pipeline regularly for manual liquid drainage, so that the downtime is shortened, the manpower and material resource cost is saved, and the production efficiency is improved. In addition, the liquid collecting section 3 also plays a role in collecting liquid, so that the liquid can be prevented from flowing back into the equipment, and the damage probability of the equipment is reduced.

Description

Technical Field

[0001] This application relates to the technical field of exhaust air, and more particularly, to an exhaust duct assembly. Background Art

[0002] During industrial production, equipment often needs to exhaust air to the outside through exhaust ducts. For some equipment, such as drying equipment, cleaning equipment, steam generating equipment, or some chemical reaction equipment, the discharged gas usually contains water vapor or other liquid vapors, which are likely to condense inside the exhaust duct, resulting in the problem of liquid accumulation. When the liquid accumulation in the exhaust duct reaches a certain level, the liquid will occupy a large amount of the internal space of the exhaust duct, reducing the effective cross-sectional area of the duct. On the one hand, it will cause a decrease in the gas flow rate through the duct and a decline in the exhaust efficiency, resulting in the equipment being unable to timely discharge the waste gas or moisture generated during the production process, thus affecting the air quality of the entire production environment. On the other hand, it may also cause a decrease in the exhaust pressure, leading to an imbalance in the internal pressure of the equipment, and further causing fluctuations in the process flow. In addition, the liquid accumulation in the exhaust duct may also cause corrosion of the duct, and the backflow of the accumulated liquid may cause damage to the equipment.

[0003] In actual production, in order to ensure product quality and avoid process fluctuations and product quality risks caused by liquid accumulation in the exhaust duct, a common countermeasure is to regularly perform shutdown maintenance on the equipment. However, this method requires disassembling the exhaust duct and manually removing the accumulated liquid in the duct by workers, which requires a large amount of labor and material costs and will increase the downtime of the equipment, affecting production efficiency, and its overall effect is not ideal. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide an exhaust duct assembly that can instantaneously discharge the internal accumulated liquid during operation, help prevent the attenuation of the exhaust air pressure and volume, avoid corrosion of the duct and backflow of the liquid, and can reduce the labor and material costs and downtime required for removing the accumulated liquid.

[0005] This application provides an exhaust duct assembly, which includes an air inlet section, a liquid collection section, and an air outlet section that are connected in sequence. Among them, the air inlet section is provided with an air inlet, the air outlet section is provided with an air outlet, the middle part of the liquid collection section is lower than its two end parts, and a liquid discharge port is provided at the lowest part of the liquid collection section.

[0006] In an implementable solution, the exhaust duct assembly includes a liquid discharge pipe connected to the liquid discharge port.

[0007] In an implementable solution, a one-way valve is provided at the connection between the liquid discharge port and the liquid discharge pipe, and the one-way valve is used to achieve one-way conduction from the liquid collection section to the liquid discharge pipe.

[0008] In an implementable solution, the air inlet section and the air outlet section adopt a flexible bending pipe structure.

[0009] In an implementable solution, an observation window is provided on the liquid collection section for observing the liquid accumulation inside the liquid collection section.

[0010] In an implementable solution, the exhaust duct assembly includes an alarm and a liquid level sensor disposed inside the liquid collection section for detecting the liquid level. The liquid level sensor is communicatively connected to the alarm. When the liquid level sensor detects that the liquid level in the liquid collection section reaches a preset liquid level value, the alarm receives the liquid level signal from the liquid level sensor and issues an alarm message.

[0011] In an implementable solution, the exhaust duct assembly further includes a liquid collector, and the liquid collector is connected to the end of the drain pipe.

[0012] In an implementable solution, the inside of the liquid collector is set to a negative pressure environment.

[0013] In an implementable solution, the exhaust duct assembly further includes an auxiliary exhaust duct, and the auxiliary exhaust duct is connected between the air inlet section and the air outlet section in a manner parallel to the liquid collection section, and the auxiliary exhaust duct is higher than the liquid collection section.

[0014] In an implementable solution, the middle part of the auxiliary exhaust duct is not lower than its two end parts.

[0015] Compared with the prior art, the beneficial effects of the present application at least include:

[0016] The present application provides an exhaust duct assembly, in which a drain port 301 is provided at the lowest part of the liquid collection section 3, so that the liquid accumulated inside the pipe can be discharged immediately. This design can, on the one hand, prevent the attenuation of the exhaust air pressure and air volume caused by the liquid accumulation occupying the cross-section of the pipe, thereby improving the process fluctuation problem and reducing the possible product quality risk. On the other hand, it also helps to avoid the corrosion of the pipe and prevent the damage of the pipe. Compared with the traditional exhaust duct, the exhaust duct assembly provided by the present application does not need to be regularly disassembled to drain the liquid manually, so the downtime is reduced, which helps to save labor and material costs and improve production efficiency. In addition, the liquid collection section 3 also plays a role in converging the liquid, which helps to prevent the liquid from flowing back into the equipment and reduces the probability of equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 FIG. 1 is a schematic diagram of a first exhaust duct assembly shown according to an embodiment of the present application;

[0019] Figure 2 Schematic diagram of the second exhaust duct assembly shown according to an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the third exhaust duct assembly shown according to an embodiment of the present application;

[0021] Figure 4 is Figure 3 Working schematic diagram of the exhaust duct assembly in

[0022] Figure 5 is Figure 3 Working schematic diagram of the exhaust duct assembly in

[0023] In the figure: 1, air inlet section; 2, air outlet section; 3, liquid collection section; 4, liquid discharge pipe; 5, liquid collector; 6, auxiliary exhaust duct; 7, equipment to be exhausted; 8, main exhaust duct; 101, air inlet; 201, air outlet; 301, liquid discharge port; 302, observation window; 401, check valve. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0026] As Figure 1 shown, the present application provides an exhaust duct assembly, including an air inlet section 1, a liquid collection section 3 and an air outlet section 2 that are connected in sequence. Among them, the air inlet section 1 is provided with an air inlet 101, and the air outlet section 2 is provided with an air outlet 201. The middle part of the liquid collection section 3 is lower than its two end parts, and a liquid discharge port 301 is provided at the lowest part of the liquid collection section 3.

[0027] As Figure 4 shown, during use, the air inlet 101 can be directly connected to the exhaust port of the equipment to be exhausted, and the air outlet 201 can be connected to the external main exhaust duct 8, or according to the actual working conditions, the air outlet 201 can also be directly communicated with the outside atmosphere, and no limitation is made here.

[0028] During operation, the air exhaust equipment is required to introduce air flow into the air inlet 101. The air flow first continuously descends after entering the liquid collection section 3, then continuously ascends after reaching the lowest point, and finally flows out of the liquid collection section 3. Specifically, as Figure 1 and Figure 2 shown, the liquid collection section 3 can use elbow pipes such as arc-shaped elbow pipes and U-shaped pipes, and there is no limitation here.

[0029] Since the liquid discharge port 301 is provided at the lowest point of the liquid collection section 3, the liquid formed in the pipeline can be discharged immediately, which helps to avoid the occurrence of liquid accumulation problems. On the one hand, this design can prevent the attenuation of the exhaust air pressure and air volume caused by the liquid accumulation occupying the cross-section of the pipeline, thereby improving the process fluctuation problem and reducing the possible product quality risks. On the other hand, it also helps to avoid the corrosion of the pipeline and prevent the pipeline from being damaged. Compared with the traditional exhaust air pipe, the exhaust air pipe assembly provided in this application does not need to regularly disassemble the pipeline for manual liquid discharge, so the downtime is reduced, which helps to save labor and material costs and improve production efficiency. In addition, the liquid collection section 3 also plays a role in converging the liquid, which helps to prevent the liquid from flowing back into the equipment interior and reduces the probability of equipment damage.

[0030] In one embodiment, as Figure 1 shown, the exhaust air pipe assembly further includes a liquid discharge pipe 4 connected to the liquid discharge port 301.

[0031] In one embodiment, as Figure 1 shown, a check valve 401 is provided at the connection between the liquid discharge port 301 and the liquid discharge pipe 4. The check valve 401 is used to achieve one-way conduction from the liquid collection section 3 to the liquid discharge pipe 4. This design can effectively prevent the liquid from flowing back into the interior of the exhaust air pipe assembly through the liquid discharge pipe 4 under the action of external pressure, and thus eliminates the possibility of the liquid flowing back into the equipment interior, which plays an important role in preventing equipment damage.

[0032] In addition, a switch can be provided for the check valve 401 to control the opening and closing state and the opening degree of the check valve 401 (not shown in the figure). In this way, it can be adjusted specifically according to the severity of the liquid accumulation situation, so as to better meet the needs of different air exhaust equipment to be processed.

[0033] In one embodiment, as Figure 1 shown, the air inlet section 1 and the air outlet section 2 adopt a flexible bending pipeline structure, so that the air inlet 101 and the air outlet 201 can change directions within a preset range. In this way, regardless of the orientation of the air exhaust port of the air exhaust equipment to be processed, the exhaust air pipe assembly can be smoothly docked with the air exhaust equipment to be processed, and it also helps to discharge the gas to a specified position. The flexible bending pipeline structure can be one or more of corrugated pipes, gooseneck pipes or metal hoses, and there is no limitation here. This design gives the air inlet section 1 and the air outlet section 2 greater flexibility and helps to improve the versatility of the exhaust air pipe assembly.

[0034] In one embodiment, a quick connector may be provided at the air inlet 101 for achieving quick connection and disconnection between the air inlet 101 and the exhaust port of the equipment to be exhausted. In addition, a quick connector may also be provided at the air outlet 201. The quick connector should have characteristics such as good sealing performance, pressure resistance, and corrosion resistance. The specific structure and type of the quick connector are not limited here.

[0035] In one embodiment, the air inlet 101 may be set in an adjustable size form to adapt to different sizes of the equipment exhaust ports. Similarly, the air outlet 201 may also be set in an adjustable size form. In addition, the air inlet 101 and / or the air outlet 201 can also be made to be adjustable in size by setting an adapter ring on the air inlet 101 and / or the air outlet 201.

[0036] In one embodiment, as Figure 1 shown, an observation window 302 may be provided on the liquid collection section 3. The observation window 302 is made of a transparent material and can form a good sealing effect with the pipe wall of the liquid collection section 3. During use, the operator can directly see the liquid accumulation situation in the exhaust pipe assembly through the observation window 302, especially the situation near the liquid discharge port 301, so as to observe whether the liquid can be discharged smoothly. If it is observed that there is liquid accumulation in the exhaust pipe assembly, the equipment can be stopped in time to check the exhaust pipe assembly.

[0037] In addition, the liquid collection section 3 may also be made entirely of a transparent material. For example, it may be made of one or more of PVC material, acrylic material, ABS material, and polycarbonate material, which is not limited here. The liquid collection section 3 made entirely of a transparent material does not require an additional observation window, has a simpler structure, lower processing difficulty and cost, and is more convenient for the operator to observe.

[0038] In one embodiment, an alarm may also be provided for the exhaust pipe assembly, and a liquid level sensor (not shown in the figure) for detecting the liquid level may be provided in the liquid collection section 3. Among them, the liquid level sensor is communicatively connected to the alarm. When the liquid level sensor detects that the liquid level in the liquid collection section 3 reaches the preset liquid level value, the alarm receives the liquid level signal from the liquid level sensor and issues an alarm message. The liquid level sensor may be one or more of an optical liquid level sensor, a resistive liquid level sensor, a capacitive liquid level sensor, or an ultrasonic liquid level sensor, which is not limited here. Compared with the manual observation method, this design helps to more efficiently and accurately judge the liquid accumulation situation, and can achieve long-term uninterrupted detection to ensure that the liquid accumulation problem can always be processed in a timely manner at the first time, thereby avoiding greater losses. Further, the liquid level sensor may also be connected to an external control device to summarize and analyze the relevant data of the liquid accumulation situation, which is convenient for subsequent targeted improvement of the exhaust pipe assembly.

[0039] In one embodiment, as Figure 3 shown, it further includes a liquid collector 5. The liquid collector 5 is connected to the end of the drain pipe 4 and is used to hold the discharged liquid. During use, the position of the liquid collector 5 is lower than the position of the drain port 301, facilitating the accumulated liquid to flow naturally into the liquid collector 5 under the action of gravity.

[0040] In one embodiment, the inside of the liquid collector 5 can be set to a negative pressure environment. Specifically, the internal air pressure of the liquid collector 5 is lower than the internal air pressure of the liquid collection section 3. Due to the pressure difference, the accumulated liquid in the liquid collection section 3 can easily enter the liquid collector 5 through the drain pipe 4. An air extraction port can be provided on the liquid collector 5, and a negative pressure environment can be formed inside the liquid collector 3 by means such as pumping air with an air extractor. The specific method is not limited here.

[0041] In one embodiment, as Figure 5 shown, the exhaust duct assembly further includes an auxiliary exhaust duct 6. The auxiliary exhaust duct 6 is connected between the air inlet section 1 and the air outlet section 2 in a parallel manner with the liquid collection section 3, and the auxiliary exhaust duct 6 is higher than the liquid collection section 3. It can be set that the middle part of the auxiliary exhaust duct 6 is not lower than its two ends. For example, the middle part of the auxiliary exhaust duct 6 can bulge upward, or the auxiliary exhaust duct can also be a horizontal straight pipe.

[0042] During use, the two ends of the auxiliary exhaust duct 6 are respectively connected to the air inlet section 1 and the air outlet section 2, and the auxiliary exhaust duct 6 is internally communicated with the air inlet section 1 and the air outlet section 2. In this way, if the exhaust duct assembly fails to discharge the accumulated liquid normally due to some reason, resulting in the accumulated liquid occupying a large amount of the internal space of the exhaust duct assembly or even completely blocking the exhaust duct assembly, at this time, the air flow can still be discharged through the auxiliary exhaust duct 6, and the liquid generated during the exhaust process can continue to flow into the exhaust duct assembly, thus avoiding the normal exhaust of the equipment being affected when the exhaust duct assembly has a liquid discharge failure, and at the same time avoiding the accumulated liquid flowing back and damaging the equipment, providing sufficient time for the operator to solve the problem.

[0043] In one embodiment, the inner wall of the entire exhaust duct assembly can be smoothed to reduce the frictional loss of the air flow. In addition, the inner wall of the entire exhaust duct assembly can be made to transition naturally and smoothly, especially at the interfaces of different components, in order to reduce the local loss caused by the sudden change of the cross-section of the pipeline. This is because if the frictional loss and local loss of the air flow are too large, it may lead to a decrease in the exhaust efficiency, unstable exhaust pressure, and accelerated wear of the inner wall of the pipeline, resulting in a decrease in production efficiency and equipment damage.

[0044] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An exhaust duct assembly, characterized in that, It includes an air inlet section (1), a liquid collecting section (3), and an air outlet section (2) that are connected in sequence; The air inlet section (1) is provided with an air inlet (101); The air outlet section (2) is provided with an air outlet (201); The middle part of the liquid collecting section (3) is lower than its two end parts, and a liquid discharge port (301) is provided at the lowest part of the liquid collecting section (3).

2. The exhaust duct assembly according to claim 1, wherein, It further includes a liquid discharge pipe (4) connected to the liquid discharge port (301).

3. The exhaust duct assembly according to claim 2, wherein A one-way valve (401) is provided at the connection between the liquid discharge port (301) and the liquid discharge pipe (4), and the one-way valve (401) is used to achieve one-way conduction from the liquid collecting section (3) to the liquid discharge pipe (4).

4. The exhaust duct assembly according to claim 1, characterized in that, The air inlet section (1) and the air outlet section (2) adopt a flexible bent pipe structure.

5. The exhaust duct assembly according to claim 1, characterized in that, An observation window (302) for observing the liquid accumulation inside the liquid collecting section (3) is provided on the liquid collecting section (3).

6. The exhaust duct assembly according to claim 1, characterized in that, It includes an alarm and a liquid level sensor arranged inside the liquid collecting section (3) and used for detecting the liquid level. The liquid level sensor is communicatively connected to the alarm; when the liquid level sensor detects that the liquid level in the liquid collecting section (3) reaches a preset liquid level value, the alarm receives the liquid level signal from the liquid level sensor and issues an alarm message.

7. The exhaust duct assembly according to claim 2, wherein It further includes a liquid collector (5), and the liquid collector (5) is connected to the end of the liquid discharge pipe (4).

8. The exhaust duct assembly according to claim 7, characterized in that, The inside of the liquid collector (5) is set to a negative pressure environment.

9. The exhaust duct assembly according to any one of claims 1-8, characterized in that, It further includes an auxiliary exhaust air pipe (6), and the auxiliary exhaust air pipe (6) is connected between the air inlet section (1) and the air outlet section (2) in a parallel manner with the liquid collecting section (3), and the auxiliary exhaust air pipe (6) is higher than the liquid collecting section (3).

10. The exhaust duct assembly according to claim 9, characterized in that, The middle part of the auxiliary exhaust air pipe (6) is not lower than its two end parts.

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