An easy-to-clean exhaust gas recirculation system

Abstract

This utility model relates to the technical field of exhaust gas recirculation systems, specifically an easy-to-clean exhaust gas recirculation system, including a control valve body. The control valve body is provided with an air inlet, an air outlet, and an inner cavity. An air inlet hole is fixed in the inner cavity in the direction of the air inlet. A circular valve is provided in the inner cavity at the position of the air inlet hole. A driving device is installed on the control valve body. A connecting rod is fixed downward at the output end of the driving device. The connecting rod is located in the inner cavity. The connecting rod and the circular valve are connected and fixed by a quick-release assembly. The quick-release assembly includes a locking head and a limiting rod. This easy-to-clean exhaust gas recirculation system, by setting up a quick-release assembly, fixes the circular valve with the cooperation of the locking head, the limiting rod, and the threaded column. The linkage limiting groove and the open groove enable quick disassembly of the circular valve, solving the problem of obstruction to the cleaning of the control valve and realizing quick disassembly of the control valve for easy cleaning.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas recirculation systems, specifically an exhaust gas recirculation system that is easy to clean. Background Technology

[0002] Drying equipment mainly uses the hot air generated by the dryer to dry the material. Since the dryer produces a large amount of high-temperature exhaust gas during operation, and the exhaust gas carries not only the moisture and a small amount of powder particles from the dried material, but also a large amount of heat energy, the existing exhaust gas circulation system recycles and reuses the exhaust gas to reduce energy waste.

[0003] A tail gas recirculation system typically refers to a device connected to a dryer via pipelines to recover and recycle tail gas. The system is equipped with control valves to regulate the tail gas flow rate, ensuring it doesn't overload. However, during tail gas collection, small amounts of other substances carried over from the dried material, and even some powdery particles from the dried material, may remain in the tail gas. Over time, this can cause blockages in the tail gas recirculation system, requiring regular cleaning. However, due to the complex internal structure of the control valves in the tail gas recirculation system and the limitations imposed by the valves within them, cleaning is difficult and often incomplete. To address these issues, this application designs a tail gas recirculation system that is easy to clean. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, this utility model provides an exhaust gas recirculation system that is easy to clean.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-clean exhaust gas recirculation system, comprising a control valve body, wherein the control valve body is provided with an air inlet, an air outlet, and an inner cavity, an air inlet hole fixed in the direction of the air inlet in the inner cavity, a circular valve disposed in the inner cavity at the position of the air inlet hole, a drive device mounted on the control valve body, a connecting rod fixed downward at the output end of the drive device, the connecting rod being located in the inner cavity, and the connecting rod and the circular valve being connected and fixed through a quick-release assembly. The assembly includes a locking head and a limiting rod. Two limiting rods are provided and symmetrically fixed on both sides of the locking head. A threaded post is fixed to the bottom end of the connecting rod. The threaded post passes through a circular valve to achieve a sliding connection. The threaded post is threadedly connected to the locking head. A reinforcing assembly is provided on the locking head. Two limiting grooves are symmetrically opened on the inner wall of the inner cavity. The limiting rod is slidably connected to the limiting groove. An open groove is opened at the air inlet position in the inner cavity. The open groove communicates with the limiting groove. A limiting assembly is provided on the open groove.

[0008] To prevent the circular valve from loosening, the present invention includes an improvement in which the reinforcing component comprises a contact ring and a spring. The contact ring is located above the locking head and contacts the bottom end of the circular valve. The spring is fixed between the contact ring and the locking head.

[0009] To prevent the limiting rod from sliding out of the limiting groove, the present invention is improved by including a mounting groove and a retaining spring in the limiting component. The mounting groove is formed on the open groove, and the retaining spring is fixed on the mounting groove.

[0010] To improve the sealing performance of the circular valve when closed, this invention includes an improvement where a sealing ring is fixed to the top of the circular valve.

[0011] To facilitate installation, this utility model is improved by providing flanges for both the air inlet and the air outlet.

[0012] To reduce the adsorption of fine particles in the exhaust gas into the inner cavity, this invention is improved by providing an antistatic coating on the inner wall of the inner cavity.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides an easy-to-clean exhaust gas recirculation system, which has the following beneficial effects:

[0015] This easy-to-clean exhaust gas recirculation system uses a quick-release assembly to fix the circular valve in place with the cooperation of the locking head, limit rod, and threaded column. The linkage limit slide and open groove enable quick disassembly of the circular valve, eliminating its obstruction to the cleaning of the control valve and facilitating its quick disassembly for cleaning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first main view structure of this utility model;

[0017] Figure 2 This is a first partial structural schematic diagram of the present invention in cross-section;

[0018] Figure 3 This is a second partial structural schematic diagram in cross-section of the present invention;

[0019] Figure 4 This is a schematic diagram of the third part of the structure of this utility model.

[0020] In the diagram: 1. Control valve body; 2. Air inlet; 3. Air outlet; 4. Inner cavity; 5. Air inlet hole; 6. Circular valve; 7. Drive device; 8. Connecting rod; 9. Locking head; 10. Limiting rod; 11. Threaded column; 12. Limiting groove; 13. Open groove; 14. Contact ring; 15. Spring; 16. Mounting groove; 17. Snap ring; 18. Sealing ring; 19. Flange. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 A tail gas recirculation system that is easy to clean includes a control valve body 1. The control valve body 1 is provided with an air inlet 2, an air outlet 3, and an inner cavity 4. An air inlet hole 5 is fixed in the inner cavity 4 in the direction of the air inlet 2. A circular valve 6 is provided in the inner cavity 4 at the position of the air inlet hole 5. A drive device 7 is installed on the control valve body 1. A connecting rod 8 is fixed downward at the output end of the drive device 7. The connecting rod 8 is located in the inner cavity 4. The connecting rod 8 and the circular valve 6 are connected and fixed by a quick-release assembly. The quick-release assembly includes a locking head 9 and a limiting rod 10. Two limiting rods 10 are provided and symmetrically fixed on both sides of the locking head 9. A threaded post 11 is fixed at the bottom end of the connecting rod 8. The threaded post 11 passes through the circular valve 6 to achieve a sliding connection. The threaded post 11 is threadedly connected to the locking head 9. A reinforcing component is provided on the locking head 9. Two limiting grooves 12 are symmetrically opened on the inner wall of the inner cavity 4. The limiting rod 10 is slidably connected to the limiting groove 12. An open groove 13 is opened in the inner cavity 4 at the position of the air inlet 2. The open groove 13 communicates with the limiting groove 12. A limiting component is provided on the open groove 13.

[0023] In use, the drive device 7 employs a pneumatic or mechanical linkage device, both existing mature technologies. During normal operation, the locking head 9 is threaded onto the threaded post 11, and the limiting rod 10 is slidably connected to the limiting groove 12. The drive device 7 drives the connecting rod 8 and the circular valve 6 to move up and down. This movement of the circular valve 6, in turn, causes the locking head 9 and the limiting rod 10 to move up and down as well. The limiting rod 10 slides on the limiting groove 12, which simultaneously restricts its rotation, preventing the locking head 9 from rotating. Disconnect from the threaded post 11, adjust the distance between the circular valve 6 and the air inlet hole 5 to adjust the exhaust gas intake. When cleaning is required, first remove the retaining ring 17, so that the drive device 7 drives the circular valve 6 to move downward, which in turn drives the locking head 9 and the limiting rod 10 to move downward, and makes the limiting rod 10 slide out of the limiting groove 12 and into the open groove 13. The limiting groove 12 no longer restricts the limiting rod 10, so the locking head 9 and the limiting rod 10 can be rotated, so that the locking head 9 disconnects from the threaded post 11, and the circular valve 6 can be disconnected from the connecting rod 8, making it convenient to clean the inner cavity 4.

[0024] In actual use, it was found that the locking head 9 is threaded to the threaded post 11 to fix the circular valve 6 to the connecting rod 8. However, the rotation angle of the locking head 9 is limited by the limiting rod 10 and the limiting slide groove 12, which may cause the circular valve 6 to shake. In order to avoid the above problem, in this embodiment, the reinforcing component includes a contact ring 14 and a spring 15. The contact ring 14 is located above the locking head 9 and contacts the bottom end of the circular valve 6. The spring 15 is fixed between the contact ring 14 and the locking head 9.

[0025] In actual use, it was found that when the locking head 9 and the limiting rod 10 move up and down, the limiting rod 10 may slip off the limiting groove 12. In order to avoid the above problem, in this embodiment, the limiting component includes a mounting groove 16 and a retaining spring 17. The mounting groove 16 is opened on the open groove 13, and the retaining spring 17 is fixed on the mounting groove 16.

[0026] In actual use, it was found that when the circular valve 6 is closed with the air inlet hole 5, exhaust gas is prone to leaking at the gap. In order to solve the above problem, in this embodiment, a sealing ring 18 is fixed to the top of the circular valve 6.

[0027] In actual use, it was found that, in order to facilitate the connection and installation of the control valve body 1 and the exhaust gas recirculation system, in this embodiment, both the air inlet 2 and the air outlet 3 are provided with flanges 19.

[0028] In actual use, it was found that in order to reduce the electrostatic adsorption of fine particles in the exhaust gas into the inner cavity 4, in this embodiment, an antistatic coating is provided on the inner wall of the inner cavity 4.

[0029] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0030] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0031] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tail gas recycle system for easy cleaning comprising a control valve body (1) characterized by: The control valve body (1) is provided with an air inlet (2), an air outlet (3), and an inner cavity (4). An air inlet hole (5) is fixed in the inner cavity (4) in the direction of the air inlet (2). A circular valve (6) is provided in the inner cavity (4) at the position of the air inlet hole (5). A drive device (7) is installed on the control valve body (1). A connecting rod (8) is fixed downward at the output end of the drive device (7). The connecting rod (8) is located in the inner cavity (4). The connecting rod (8) and the circular valve (6) are connected and fixed by a quick-release assembly. The quick-release assembly includes a locking head (9) and a limiting rod (10). The limiting rod (10) is provided with two... The locking head (9) is symmetrically fixed on both sides of the locking head (9). The bottom end of the connecting rod (8) is fixed with a threaded post (11). The threaded post (11) passes through the circular valve (6) to achieve a sliding connection. The threaded post (11) is threadedly connected to the locking head (9). The locking head (9) is provided with a reinforcing component. Two limiting grooves (12) are symmetrically opened on the inner wall of the inner cavity (4). The limiting rod (10) is slidably connected to the limiting groove (12). An open groove (13) is opened in the inner cavity (4) at the air inlet (2). The open groove (13) is connected to the limiting groove (12). A limiting component is provided on the open groove (13).

2. The cleanable tail gas recycle system of claim 1, wherein: The reinforcement assembly includes a contact ring (14) and a spring (15). The contact ring (14) is located above the locking head (9) and contacts the bottom end of the circular valve (6). The spring (15) is fixed between the contact ring (14) and the locking head (9).

3. The cleanable tail gas recycle system of claim 1, wherein: The limiting component includes a mounting groove (16) and a retaining ring (17), the mounting groove (16) being formed in the open slot (13), and the retaining ring (17) being fixed in the mounting groove (16).

4. The cleanable tailgas recycle system of claim 1, wherein: A sealing ring (18) is fixed to the top of the circular valve (6).

5. The cleanable exhaust gas recirculation system of claim 1, wherein: Both the air inlet (2) and the air outlet (3) are equipped with flanges (19).

6. The cleanable exhaust gas recirculation system of claim 1, wherein: An antistatic coating is provided on the inner wall of the inner cavity (4).

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