Drying machine waste heat waste gas recovery device with check valve

Abstract

The drying machine waste heat waste gas recovery device with the check valve comprises a filter body, a filter cavity is formed in the filter body, a filter element assembly is arranged in the filter cavity, an air supplement assembly is arranged at one end of the filter body, and an exhaust pipe opening used for exhausting waste gas is formed in the other end of the filter body. An input pipe opening connected with a drying machine and a material collecting pipe opening used for collecting waste materials are formed in the filtering main body; a check valve plate is rotationally arranged in the exhaust pipe opening, when the drying machine is in a working state, the check valve plate rotates so as to communicate the filtering cavity with the exhaust pipe opening, and when the drying machine is in a stopping state, the check valve plate keeps static so as to isolate the filtering cavity from the exhaust pipe opening.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a waste heat recovery device for a dryer with a check valve. Background Technology

[0002] An injection molding machine dryer is a piece of equipment used in plastic processing. It is mainly used to remove moisture from plastic granules or powder to ensure the quality of plastic products.

[0003] Existing injection molding machine dryers mainly evaporate moisture from plastic granules or powders through heating and ventilation. During the drying process, the injection molding machine dryer generates exhaust gas and blows out some plastic dust, causing environmental pollution and harm to human health.

[0004] Therefore, the dryer needs to be connected to an exhaust gas filter to filter the exhaust gas. However, the existing filter lacks a check valve structure. When the dryer stops working, external air can still enter the dryer through the filter, causing moisture from the external environment to enter the dryer and affecting the dryness inside the dryer. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a dryer waste heat recovery device with a check valve.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A waste heat recovery device for a dryer with a check valve includes a filter body, a filter chamber, a filter element assembly, a make-up air assembly at one end of the filter body, an exhaust port for discharging waste gas at the other end, and an input port for connecting to the dryer and a receiving port for collecting waste material on the filter body.

[0008] A check valve plate is installed inside the exhaust pipe. When the dryer is in operation, the check valve plate rotates to connect the filter chamber and the exhaust pipe. When the dryer is stopped, the check valve plate remains stationary to isolate the filter chamber from the exhaust pipe.

[0009] Preferably, the exhaust pipe includes an output section and a connecting section. The check valve is disposed in the output section, and the connecting section has a plurality of connection ports. With the above improvements, the connecting ports on the connecting section can be used to connect with the induced draft fan. When the dryer is in working condition, the induced draft fan will work to make the check valve rotate, and the filtered exhaust gas can be discharged through the exhaust pipe.

[0010] Preferably, the output end of the input pipe is provided with an arc-shaped air guide vane, and the arc-shaped air guide vane and the inner wall of the filter body form an air intake channel connecting the input pipe. With the above improvement, when exhaust gas and dust enter the filter chamber through the input pipe, the exhaust gas and dust enter the filter chamber from the air intake channel under the action of the arc-shaped air guide vane. The exhaust gas and dust move along the inner wall of the filter body and are filtered by the filter assembly. The filtered exhaust gas can be output through the exhaust pipe and the dust can be collected through the collection pipe.

[0011] Preferably, a rotating shaft is provided inside the exhaust pipe, and the check valve plate is rotated on the rotating shaft. When the dryer is in a stopped state, the check valve plate is vertically installed inside the exhaust pipe under the action of gravity to isolate the filter chamber and the exhaust pipe. Through the above improvement, the check valve plate is used to control the connection between the filter chamber and the exhaust pipe, so as to prevent external airflow from entering the dryer through the exhaust pipe when the dryer is in a stopped state, causing the dryer to become damp and affecting the drying effect.

[0012] Preferably, the check valve plate has a connecting protrusion, the connecting protrusion has a connecting hole, and the rotating shaft is inserted into the connecting hole. Through the above improvements, the stability of the check valve plate during rotation is enhanced.

[0013] Preferably, a rotating shaft is provided inside the exhaust pipe port, and the check valve plate is rotatably mounted on the rotating shaft. An elastic element is provided on the rotating shaft, with one end of the elastic element abutting against the exhaust pipe port and the other end abutting against the check valve plate, so that the check valve plate always has a tendency to rotate in the direction of isolating the filter chamber and the exhaust pipe port. Furthermore, a blocking protrusion is formed inside the exhaust pipe port, and the blocking protrusion abuts against the check valve plate, so that the check valve plate is kept in a vertical state. Through the above improvements, the sealing performance of the check valve plate is greatly improved.

[0014] Preferably, the air supply assembly includes a cover disposed at the end of the filter body and an air inlet hood inserted thereon. The air inlet hood forms an air inlet channel, and a filter sheet is disposed at the input end of the air inlet hood. A first filter element is disposed inside the air inlet channel. Through the above improvements, the air is first filtered by the filter sheet and then filtered a second time by the first filter element, thus preventing impurities in the air from entering the interior of the filter body.

[0015] Preferably, the filter element assembly includes a second filter element and a filter screen disposed at the end of the second filter element. The second filter element is located between the inlet and the outlet, and is connected to the air inlet channel. The filter screen is placed inside the air inlet channel. With the above improvements, after the plastic dust is filtered by the second filter element, it is deposited in the filter chamber and removed through the outlet for recycling. Since the second filter element is hollow, the exhaust gas passes through the second filter element for filtration and is discharged along the exhaust pipe. It can also be connected to the air inlet channel as part of the air inlet channel.

[0016] Preferably, the output end of the receiving pipe is connected to a collecting cup, and the collecting cup is threadedly connected to the receiving pipe. Through the above improvements, the convenience of installing and disassembling the collecting cup is enhanced, thereby improving the daily convenience for operators.

[0017] Preferably, the filter body is provided with a dust blowing pipe, which has a plurality of air jet holes, and the dust blowing pipe is spirally arranged around the outer periphery of the second filter element along the length direction of the second filter element. Through the above improvements, the dust blowing pipe can blow away the dust attached to the second filter element and avoid the occurrence of dust residue.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] By setting a filter chamber within the filter body, a filter element assembly is installed inside the filter body. One end of the filter body has an air supply component, and the other end forms an exhaust port for discharging exhaust gas. The filter body also has an input port for connecting to the dryer and a receiving port for collecting waste material. Exhaust gas and dust are filtered through the filter element assembly. The purified exhaust gas is discharged from the air supply port and reintroduced into the dryer, saving electricity and allowing for reuse. Dust, after filtration, can be discharged from the receiving port for collection and recycling, while the exhaust gas is purified, reducing emissions. To prevent air pollution, a check valve is installed inside the exhaust pipe. When the dryer is stopped, the check valve remains stationary to isolate the filter chamber and the exhaust pipe, thus preventing moisture from the external environment from entering the dryer. This ensures the dryness of the dryer's interior and guarantees the drying effect on the plastic particles. Furthermore, in the event of a dryer fan malfunction, causing the heating pipe to overheat and burn inside the air inlet pipe, the check valve can prevent outside air from entering the dryer, effectively preventing the materials inside the dryer from catching fire and further enhancing the dryer's safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 2This is a cross-sectional view of the entire embodiment of this utility model;

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of part A in the middle;

[0023] Figure 4 This is a schematic diagram of the internal structure of the filter chamber in Embodiment 1 of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the check valve plate according to Embodiment 1 of this utility model;

[0025] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0026] In the diagram: 1. Filter body; 2. Filter chamber; 3. Filter element assembly; 4. Air supply assembly; 5. Exhaust port; 6. Inlet port; 7. Receiving port; 8. Check valve; 1.1. Output section; 1.2. Connecting section; 1.3. Connecting port; 1.4. Arc-shaped air guide; 1.5. Air inlet channel; 2.1. Rotating shaft; 2.2. Connecting protrusion; 2.3. Connecting hole; 3.1. Elastic element; 3.2. Blocking protrusion; 4.1. Cover; 4.2. Air inlet hood; 4.3. Air inlet channel; 4.4. Filter plate; 4.5. First filter element; 5.1. Second filter element; 5.2. Filter screen; 6.1. Collection cup; 6.2. Dust blowing pipe; 6.3. Air jet hole; 6.4. Fixing base; Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0029] Example 1

[0030] like Figure 1-5As shown, a dryer waste heat recovery device with a check valve includes a filter body 1, a filter chamber 2 is formed inside the filter body 1, a filter element assembly 3 is provided in the filter chamber 2, a make-up air assembly 4 is provided at one end of the filter body 1, and an exhaust pipe port 5 for discharging waste gas is formed at the other end. The filter body 1 also has an input pipe port 6 for connecting to the dryer and a receiving pipe port 7 for collecting waste materials.

[0031] In the entire exhaust gas filtration process, the exhaust gas and dust are first filtered through the filter element assembly 3. The purified exhaust gas is discharged from the exhaust pipe 5 and reintroduced into the dryer, which can save power consumption. The dust can be discharged from the receiving pipe 7 after filtration, and the dust is collected and recycled. This not only purifies the exhaust gas and reduces air pollution, but also greatly improves the air quality in the workshop.

[0032] Furthermore, a check valve plate 8 is installed inside the exhaust port 5. When the dryer is in operation, the check valve plate 8 rotates to connect the filter chamber 2 and the exhaust port 5. When the dryer is stopped, the check valve plate 8 remains stationary to isolate the filter chamber 2 and the exhaust port 5, thereby preventing moisture from the external environment from entering the dryer and ensuring the dryness of the dryer, thus ensuring the drying effect on the plastic particles.

[0033] In addition, when the dryer fan malfunctions and stops operating, the heating pipes continue to heat up, causing high-temperature combustion inside the air inlet pipe. The check valve can prevent outside air from entering the dryer, effectively preventing the materials inside the dryer from catching fire.

[0034] like Figure 2 As shown, as a further explanation of the embodiment of the exhaust port 5, the exhaust port 5 includes a connected output section 1.1 and a connecting section 1.2. The check valve plate 8 is disposed in the output section 1.1, and a plurality of connection ports 1.3 are formed on the connecting section 1.2. The exhaust port 1.3 on the connecting section 1.2 is connected to the induced draft fan. When the dryer is in working condition, the induced draft fan will work, causing the check valve plate 8 to rotate, and the filtered exhaust gas can be discharged through the exhaust port 5.

[0035] Preferably, the exhaust port 5 is filled with a desiccant to further absorb moisture in the hot air and ensure the dryness of the hot air returned to the dryer.

[0036] like Figure 2 , Figure 3As shown in the following further explanation regarding the installation of the check valve plate 8 in this embodiment, a rotating shaft 2.1 is provided inside the exhaust port 5, and the check valve plate 8 is rotatably mounted on the rotating shaft 2.1. When the dryer is in a stopped state, the check valve plate 8 is vertically mounted inside the exhaust port 5 under the action of gravity to isolate the filter chamber 2 and the exhaust port 5, thereby preventing external airflow from entering the dryer through the exhaust port 5 when the dryer is in a stopped state, causing the dryer to become damp and affecting the drying effect.

[0037] Specifically, a connecting protrusion 2.2 is formed on the check valve plate 8, and a connecting hole 2.3 is formed on the connecting protrusion 2.2. The rotating shaft 2.1 is inserted into the connecting hole 2.3, which improves the stability of the check valve plate 8 during rotation.

[0038] like Figure 1 , Figure 2 As shown, to further explain the air supply component 4, the air supply component 4 includes a cover 4.1 disposed at the end of the filter body 1, and an air inlet hood 4.2 inserted on it. The air inlet hood 4.2 forms an air inlet channel 4.3, and a filter 4.4 is disposed at the input end of the air inlet hood 4.2. A first filter element 4.5 is disposed inside the air inlet channel 4.3. The air inlet hood 4.2 can be connected to a fresh air system. The air first passes through the filter 4.4 for the first filtration, and then through the first filter element 4.5 for the second filtration, to prevent impurities in the air from entering the filter body 1, thereby realizing the air supply function.

[0039] Among them, the filter screen 5.2 can not only filter, but can also be placed in the air inlet channel 4.3 to improve the stability of the installation of the second filter element 5.1.

[0040] Further explanation of the implementation of the filter element assembly 3: The filter element assembly 3 includes a second filter element 5.1 and a filter screen 5.2 disposed at the end of the second filter element 5.1. The second filter element 5.1 is located between the inlet port 6 and the receiving port 7. The second filter element 5.1 is connected to the air inlet channel 4.3, serving as part of the air inlet channel 4.3, and the filter screen 5.2 is placed inside the air inlet channel 4.3. After the plastic dust is filtered by the second filter element 5.1, it is deposited in the filter chamber 2 and removed through the receiving port 7 for recycling. Since the second filter element 5.1 is hollow, the exhaust gas passes through the second filter element 5.1 for filtration and is discharged along the exhaust port 5, thereby achieving the filtration of exhaust gas.

[0041] Preferably, a fixing seat 6.4 is formed inside the filter body 1, one end of the second filter element 5.1 is inserted into the fixing seat 6.4, and the filter screen 5.2 at the other end of the second filter element 5.1 has a protruding snap-fit ​​part, which is inserted into the air inlet channel 4.3 to ensure the stability of the installation of the second filter element 5.1.

[0042] Preferably, the output end of the inlet 6 is provided with an arc-shaped air guide 1.4, and the arc-shaped air guide 1.4 and the inner wall of the filter body 1 form an air intake channel 1.5 connecting the inlet 6. When the exhaust gas and dust enter the filter chamber 2 through the inlet 6, the exhaust gas and dust enter the filter chamber 2 from the air intake channel 1.5 under the action of the arc-shaped air guide 1.4. The exhaust gas and dust move along the inner wall of the filter body 1 and are filtered by the filter assembly. The filtered exhaust gas can be output through the exhaust port 5 and the dust can be collected through the collection port 7.

[0043] like Figure 2 As shown, preferably, the output end of the receiving pipe 7 is connected to a collecting cup 6.1, and the collecting cup 6.1 is threadedly connected to the receiving pipe 7, which improves the convenience of installing and disassembling the collecting cup 6.1, thereby improving the daily convenience of operators.

[0044] like Figure 2 As shown, in some other embodiments, the filter body 1 is provided with a dust blowing pipe 6.2, which has a plurality of air jet holes 6.3. The dust blowing pipe 6.2 is spirally arranged around the outer periphery of the second filter element 5.1 along the length direction of the second filter element 5.1. The dust blowing pipe 6.2 can blow away the dust attached to the second filter element 5.1, thus avoiding the occurrence of dust residue.

[0045] Example 2

[0046] like Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that a rotating shaft 2.1 is provided inside the exhaust port 5, and the check valve plate 8 is rotatably mounted on the rotating shaft 2.1. An elastic element 3.1 is provided on the rotating shaft 2.1. One end of the elastic element 3.1 abuts against the exhaust port 5, and the other end abuts against the check valve plate 8, so that the check valve plate 8 always has a tendency to rotate in the direction of isolating the filter chamber 2 and the exhaust port 5. Furthermore, a blocking protrusion 3.2 is formed inside the exhaust port 5, and the blocking protrusion 3.2 abuts against the check valve plate 8, so that the check valve plate 8 is kept in a vertical state, thereby greatly improving the sealing performance between the check valve plate 8 and the exhaust port 5.

[0047] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A dryer waste heat off-gas recovery device having a check valve, characterized by, The utility model provides a filter device for drying machine, including filter main part (1), constitute filter cavity (2) in filter main part (1), be provided with filter core subassembly (3) in filter cavity (2), filter main part (1) one end is provided with air supplement subassembly (4), the other end constitutes the exhaust pipe mouth (5) for discharging exhaust gas, and constitute the input pipe mouth (6) for connecting drying machine and the material collecting pipe mouth (7) for collecting waste material on filter main part (1); The exhaust pipe mouth (5) is rotatably provided with a check valve plate (8), when the drying machine is in a working state, the check valve plate (8) rotates to connect the filter cavity (2) and the exhaust pipe mouth (5), and when the drying machine is in a stop state, the check valve plate (8) remains stationary to isolate the filter cavity (2) and the exhaust pipe mouth (5).

2. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The exhaust pipe mouth (5) includes a jointed output section (1.1) and a connecting section (1.2), the check valve plate (8) is arranged in the output section (1.1), and a plurality of connecting openings (1.3) are formed in the connecting section (1.2).

3. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The output end of the input pipe mouth (6) is provided with an arc-shaped air guide vane (1.4), and the arc-shaped air guide vane (1.4) and the inner wall of the filter main part (1) form an air inlet channel (1.5) that communicates with the input pipe mouth (6).

4. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The exhaust pipe mouth (5) is provided with a rotating shaft (2.1), and the check valve plate (8) is rotatably arranged on the rotating shaft (2.1), when the drying machine is in a stop state, the check valve plate (8) is vertically arranged in the exhaust pipe mouth (5) under the action of gravity to isolate the filter cavity (2) and the exhaust pipe mouth (5).

5. A dryer waste heat recovery device having a check valve according to claim 4, characterized in that, The check valve plate (8) is formed with a connecting protrusion (2.2), the connecting protrusion (2.2) is formed with a connecting hole (2.3), and the rotating shaft (2.1) is inserted into the connecting hole (2.3).

6. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The exhaust pipe mouth (5) is provided with a rotating shaft (2.1), and the check valve plate (8) is rotatably arranged on the rotating shaft (2.1), the rotating shaft (2.1) is provided with an elastic element (3.1), one end of the elastic element (3.1) abuts against the exhaust pipe mouth (5), and the other end abuts against the check valve plate (8), so that the check valve plate (8) always has a movement trend of rotating towards the direction of isolating the filter cavity (2) and the exhaust pipe mouth (5), and the exhaust pipe mouth (5) is formed with a blocking protrusion (3.2) that abuts against the check valve plate (8) to keep the check valve plate (8) in a vertical state.

7. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The air supplement subassembly (4) includes a cover (4.1) arranged at the end of the filter main part (1) and an air inlet cover (4.2) inserted thereon, the air inlet cover (4.2) forms an air inlet channel (4.3), the air inlet cover (4.2) is provided with a filter sheet (4.4) at the input end, and the air inlet channel (4.3) is provided with a first filter core (4.5).

8. A dryer waste heat recovery device having a check valve according to claim 7, characterized in that, The filter core assembly (3) comprises a second filter core (5.1) and a filter screen (5.2) arranged at the end of the second filter core (5.1), the second filter core (5.1) is arranged between the input pipe (6) and the material collecting pipe (7), the second filter core (5.1) is communicated with the air inlet channel (4.3), and the filter screen (5.2) is arranged in the air inlet channel (4.3).

9. The dryer waste heat recovery device with check valve according to claim 1, characterized in that, The output end of the material collecting pipe (7) is connected with a collecting cup (6.1), and the collecting cup (6.1) is threadedly connected with the material collecting pipe (7).

10. The dryer waste heat recovery device with check valve according to claim 8, characterized in that, A dust blowing pipe (6.2) is arranged in the filter main body (1), a plurality of air injection holes (6.3) are arranged on the dust blowing pipe (6.2), and the dust blowing pipe (6.2) is spirally arranged outside the second filter core (5.1) along the length direction of the second filter core.

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