Device for preventing exhaust gas backflow of diesel generating set

Abstract

The utility model relates to the technical field of diesel generating sets, and discloses a device for preventing exhaust gas backflow of a diesel generating set, which comprises a backflow prevention base, an air inlet is fixedly arranged at the bottom of the backflow prevention base, and an air outlet is fixedly arranged at the top end of the backflow prevention base. The air inlet and the air outlet are both communicated with the anti-backflow base, an anti-backflow device is arranged in the anti-backflow base, the anti-backflow device is composed of an exhaust channel and a blocking part which is arranged at an outlet of the exhaust channel and can automatically reset, and the blocking part can completely cover the outlet of the exhaust channel. According to the utility model, when exhaust is not carried out, the exhaust gas is attached to the wall surface of the anti-backflow base through self-elasticity to form a one-way channel, so that the function of preventing exhaust gas backflow is achieved, and waste gas can only be exhausted from bottom to top and cannot flow in reversely by utilizing the gravity of hard materials, so that the function of preventing the exhaust gas from flowing back is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel generator sets, in particular to a device for preventing exhaust gas backflow of diesel generator sets. Background Art

[0002] If the exhaust gas generated by the diesel generator set during operation flows back, it will cause harm to the unit itself. The exhaust gas backflow may cause corrosion and pollution to the internal components of the diesel generator set, affecting its normal operation and service life. For example, particulate matter (PM) and nitrogen oxides (NOx) may be deposited inside the engine, increasing wear and reducing combustion efficiency.

[0003] Existing exhaust gas backflow devices, such as Chinese patent publication No. CN201910912768.9, discloses a desulfurization and denitrification tower for preventing exhaust gas backflow, including a desulfurization and denitrification tower, a demister, a desulfurization device and a denitrification device. Anti-backflow devices are arranged under the desulfurization equipment and the denitrification equipment. The anti-backflow device includes a mounting seat, a gas pipe fitting and a water pipe fitting. The mounting seat includes a partition, a partition sealing gasket and a support ring. The partition is a circular groove plate, and a drainage outlet is opened in the center of the partition.

[0004] This type of exhaust gas backflow prevention is achieved by lowering the exhaust port into accumulated water, but the accumulated water will evaporate during use, especially the exhaust gas with heat, which accelerates the evaporation process. Once the water level is lower than the exhaust port, the exhaust gas backflow prevention function cannot be achieved.

[0005] To this end, we propose a device for preventing exhaust gas backflow from a diesel generator set. Utility Model Content

[0006] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a device for preventing exhaust gas backflow of a diesel generator set.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for preventing exhaust gas backflow from a diesel generator set, comprising an anti-backflow base, an air inlet is fixedly installed at the bottom of the anti-backflow base, an air outlet is fixedly installed at the top of the anti-backflow base, the air inlet and the air outlet are both communicated with the anti-backflow base, an anti-backflow device is arranged inside the anti-backflow base, the anti-backflow device consists of an exhaust channel and a blocking part arranged at the outlet of the exhaust channel, the exhaust channel is vertically arranged from bottom to top, the blocking part can completely cover the outlet of the exhaust channel, the blocking part is opened under pressure during exhaust, and the blocking part fits with the outlet of the exhaust channel after the exhaust is completed.

[0008] Preferably, a bracket is fixedly installed inside the anti-backflow base, a center plate is fixedly installed at the center of the bracket, an exhaust channel is formed between the center plate and the anti-backflow base, an anti-backflow spring is fixedly installed at the edge of the center plate, the anti-backflow spring is a blocking part, the anti-backflow spring is made of rubber, and the outer edge of the anti-backflow spring is interference fit with the anti-backflow base.

[0009] Preferably, a bracket is fixedly installed inside the anti-backflow base, a center plate is fixedly installed at the center of the bracket, an exhaust channel is formed between the center plate and the anti-backflow base, a one-way spring clip is fixedly installed at the edge of the center plate, the one-way spring clip is a blocking part, and the thickness of the one-way spring clip gradually decreases as it extends toward the end.

[0010] Preferably, a bracket is fixedly mounted on the side wall of the backflow prevention base, the bracket is an annular ring, and a bracket groove cooperating with the bracket is provided in the middle of the one-way spring sheet.

[0011] Preferably, the cross section of the bracket is sawtooth-shaped, and the bracket groove is a groove with a sawtooth-shaped inner surface.

[0012] Preferably, a bracket is fixedly installed inside the anti-backflow base, a center plate is fixedly installed at the center of the bracket, a ventilation ring is fixedly installed between the edge of the center plate and the inner wall of the anti-backflow base, and air passages that penetrate the ventilation ring are evenly opened on the ventilation ring, and the air passages form exhaust passages. A rotating bracket is fixedly installed at the position of the center plate corresponding to the air passage, and a connecting block that can rotate around the axis of the rotating bracket is movably installed on the rotating bracket, and a pressure plate is fixedly installed on one end of the connecting block close to the air passage, the pressure plate is a fan-shaped plate with an L-shaped cross section, and the pressure plate is a blocking part, and the pressure plate completely covers the air passage in the vertical projection.

[0013] Preferably, the upper surface of the ventilation ring gradually rises from the inside to the outside to form a slope, and a filter is fixedly installed on the surface of the ventilation channel.

[0014] Beneficial Effects

[0015] The utility model provides a device for preventing exhaust gas backflow from a diesel generator set.

[0016] Beneficial effects:

[0017] (1) The device for preventing exhaust gas backflow from a diesel generator set achieves the function of preventing exhaust gas backflow by installing an anti-backflow base at the exhaust port of the diesel generator set and arranging an anti-backflow device that can only flow in one direction inside the anti-backflow base. Specifically, the elastic force of the anti-backflow spring sheet and the one-way spring sheet is utilized to separate from the anti-backflow base when subjected to pressure shock during exhaust. When not exhausting, the elastic force of the one-way spring sheet fits with the wall surface of the anti-backflow base to form a one-way channel, thereby achieving the function of preventing exhaust gas backflow. The gravity of the hard material itself can also be utilized to make the exhaust gas only discharged from bottom to top and unable to flow in reverse, thereby achieving the function of preventing exhaust gas backflow. In addition, this exhaust method from bottom to top is conducive to smooth exhaust and has stronger reliability in preventing exhaust gas backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

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

[0022] Figure 3 This is a structural cross-sectional view of the second embodiment of the utility model;

[0023] Figure 4 This is a structural sectional view of embodiment 3 of the present utility model.

[0024] Legend:

[0025] 1. Anti-backflow base; 2. Air inlet; 3. Air outlet; 4. Bracket; 5. Center plate; 6. Anti-backflow spring; 7. One-way spring; 8. Bracket; 9. Bracket; 10. Ventilation ring; 11. Ventilation duct; 12. Rotating bracket; 13. Connecting block; 14. Pressing plate; 15. Filter. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] A device for preventing exhaust gas backflow from a diesel generator set, such as Figure 1 As shown, it includes an anti-backflow base 1, which is a hollow shell. An air inlet 2 is fixedly installed at the bottom of the anti-backflow base 1, and an air outlet 3 is fixedly installed at the top of the anti-backflow base 1. The air inlet 2 and the air outlet 3 are both connected to the anti-backflow base 1. When in use, the air inlet 2 is connected to the exhaust pipe of the diesel generator set, and the air is discharged from the air outlet 3 after being processed by the anti-backflow device inside the anti-backflow base 1. The anti-backflow device consists of an exhaust channel and a blocking part that can be self-reset and is arranged at the outlet of the exhaust channel, wherein the blocking part can completely cover the outlet of the exhaust channel.

[0028] In the first embodiment, Figure 2 As shown, the backflow prevention device includes a bracket 4 fixedly installed inside the backflow prevention base 1, the bracket 4 is a cross-shaped structure, a center plate 5 is fixedly installed at the center of the bracket 4, the center plate 5 is a circular plate, an exhaust channel is formed between the center plate 5 and the backflow prevention base 1, and an anti-backflow spring 6 is fixedly installed at the edge of the center plate 5. The backflow prevention spring 6 is a blocking part. The backflow prevention spring 6 is made of elastic material, which is rubber in this embodiment, and can also be made of silicone. The outer edge of the backflow prevention spring 6 is interference fit with the backflow prevention base 1. When the exhaust gas enters the backflow prevention base 1 from the air inlet 2, the exhaust gas rushes to the backflow prevention spring 6, so that the edge of the backflow prevention spring 6 bounces toward the center to form a channel, and the exhaust gas passes through it. When the exhaust gas discharge pressure is insufficient, the backflow prevention spring 6 is sealed with the side wall of the backflow prevention base 1 under the action of its own elastic force, so that the exhaust gas cannot flow back, thereby achieving the function of preventing the backflow of exhaust gas.

[0029] In the second embodiment, Figure 3 As shown, the backflow prevention device includes a bracket 4 fixedly installed inside the backflow prevention base 1, the bracket 4 is a cross-shaped structure, a center plate 5 is fixedly installed at the center of the bracket 4, the center plate 5 is a circular plate, an exhaust channel is formed between the center plate 5 and the backflow prevention base 1, a one-way spring 7 is fixedly installed at the edge of the center plate 5, the one-way spring 7 is a blocking part, in this embodiment, the thickness of the one-way spring 7 gradually decreases during the extension toward the end, and when preventing backflow, the thinner end fits more closely with the backflow prevention base 1.

[0030] Furthermore, since the thickness of the end of the one-way spring piece 7 is reduced, when the exhaust gas flows back, the end of the one-way spring piece 7 is easily rebound to the lower end of the center plate 5, causing air leakage. Therefore, a bracket 9 is fixedly installed on the side wall of the anti-backflow base 1. The bracket 9 is an annular ring, and a bracket 8 cooperating with the bracket 9 is opened in the middle of the one-way spring piece 7. When the exhaust gas flows back, the bracket 9 cooperates with the bracket 8 to block the rebound of the end of the one-way spring piece 7, so that the end of the one-way spring piece 7 cannot be rushed to the lower end of the center plate 5.

[0031] In this embodiment, the bracket 9 is a circular ring with a rectangular cross section, and the bracket 8 is a right-angle groove, and the blocking effect is general. In a more preferred embodiment, the cross section of the bracket 9 is serrated, and the bracket 8 is a serrated groove with a serrated inner surface. The friction force is higher when fitted together and can withstand stronger backflow impact.

[0032] In the third embodiment, Figure 4 As shown, the backflow prevention device includes a bracket 4 fixedly installed inside the backflow prevention base 1, the bracket 4 is a cross-shaped structure, a center plate 5 is fixedly installed at the center of the bracket 4, the center plate 5 is a circular plate, a ventilation ring 10 is fixedly installed between the edge of the center plate 5 and the inner wall of the backflow prevention base 1, and ventilation channels 11 that penetrate the ventilation ring 10 are evenly opened on the ventilation ring 10, and the ventilation channels 11 form an exhaust channel, and a rotating bracket 12 is fixedly installed at the position of the center plate 5 corresponding to the ventilation channel 11, and a rotating bracket 12 is movably installed on the rotating bracket 12. The connecting block 13 rotates along the axis, and a pressure plate 14 is fixedly installed at one end of the connecting block 13 close to the air duct 11. The pressure plate 14 is a fan-shaped plate and has an L-shaped cross section. The pressure plate 14 is a blocking part. The pressure plate 14 completely covers the air duct 11 in the vertical projection. When the exhaust gas is discharged, the pressure plate 14 is pushed up. In other cases, the pressure plate 14 fits with the air duct 11 under the action of gravity to seal the air duct 11, and the reflowing exhaust gas is blocked by the pressure plate 14 and cannot flow back. There is no situation where the one-way spring 7 ages and needs frequent maintenance.

[0033] The upper surface of the ventilation ring 10 gradually rises from the inside to the outside to form a slope, which gathers the debris that falls into the backflow prevention base 1.

[0034] A filter screen 15 is fixedly installed on the surface of the air passage 11 to prevent debris from passing through the filter screen 15 and falling into the backflow prevention base 1 .

[0035] The working principle of the utility model is as follows: by installing an anti-backflow base 1 at the exhaust port of the diesel generator group, and arranging an anti-backflow device that can only flow in one direction inside the anti-backflow base 1, the function of preventing exhaust gas from flowing back is achieved. Specifically, the elastic force of the anti-backflow spring piece 6 and the one-way spring piece 7 is utilized to separate from the anti-backflow base 1 when subjected to pressure shock during exhaust. When not exhausting, the elastic force of the anti-backflow spring piece 6 and the one-way spring piece 7 form a one-way channel by fitting with the wall of the anti-backflow base 1 due to their own elastic force, thereby achieving the function of preventing exhaust gas from flowing back. In addition, the gravity of the hard material itself can be utilized so that the exhaust gas can only be discharged from bottom to top and cannot flow in reverse, thereby achieving the function of preventing exhaust gas from flowing back.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for preventing exhaust gas backflow from a diesel generator set, comprising a backflow prevention base (1), an air inlet (2) being fixedly mounted at the bottom of the backflow prevention base (1), an air outlet (3) being fixedly mounted at the top of the backflow prevention base (1), the air inlet (2) and the air outlet (3) both being in communication with the backflow prevention base (1), characterized in that: The backflow prevention base (1) is provided with a backflow prevention device inside, and the backflow prevention device is composed of an exhaust channel and a blocking portion arranged at the outlet of the exhaust channel. The exhaust channel is arranged vertically from bottom to top, and the blocking portion can completely cover the outlet of the exhaust channel. The blocking portion is opened under pressure during exhaust, and the blocking portion fits with the outlet of the exhaust channel after the exhaust is completed.

2. The device for preventing exhaust gas backflow of a diesel generator set according to claim 1, characterized in that: A bracket (4) is fixedly installed inside the anti-backflow base (1), a center plate (5) is fixedly installed at the center of the bracket (4), an exhaust channel is formed between the center plate (5) and the anti-backflow base (1), and an anti-backflow spring sheet (6) is fixedly installed at the edge of the center plate (5), the anti-backflow spring sheet (6) is a blocking part, the anti-backflow spring sheet (6) is made of rubber, and the outer edge of the anti-backflow spring sheet (6) is interference fit with the anti-backflow base (1).

3. The device for preventing exhaust gas backflow from a diesel generator set according to claim 1, characterized in that: A bracket (4) is fixedly mounted inside the backflow prevention base (1); a center plate (5) is fixedly mounted at the center of the bracket (4); an exhaust passage is formed between the center plate (5) and the backflow prevention base (1); a one-way spring sheet (7) is fixedly mounted at the edge of the center plate (5); the one-way spring sheet (7) is a blocking portion; and the thickness of the one-way spring sheet (7) gradually decreases as it extends toward the end.

4. The device for preventing exhaust gas backflow from a diesel generator set according to claim 3, characterized in that: A bracket (9) is fixedly mounted on the side wall of the backflow prevention base (1); the bracket (9) is an annular ring; a bracket groove (8) cooperating with the bracket (9) is provided in the middle of the one-way spring sheet (7).

5. The device for preventing exhaust gas backflow from a diesel generator set according to claim 4, characterized in that: The cross section of the bracket (9) is sawtooth-shaped, and the bracket groove (8) is a groove with a sawtooth-shaped inner surface.

6. The device for preventing exhaust gas backflow of a diesel generator set according to claim 1, characterized in that: A bracket (4) is fixedly installed inside the anti-backflow base (1), a center plate (5) is fixedly installed at the center of the bracket (4), a ventilation ring (10) is fixedly installed between the edge of the center plate (5) and the inner wall of the anti-backflow base (1), and ventilation channels (11) that penetrate the ventilation ring (10) are evenly opened on the ventilation ring (10), and the ventilation channels (11) form an exhaust channel. A rotating bracket (12) is fixedly installed on the center plate (5) at a position corresponding to the ventilation channel (11), and a connecting block (13) that can rotate around the axis of the rotating bracket (12) is movably installed on the rotating bracket (12), and a pressure plate (14) is fixedly installed at one end of the connecting block (13) close to the ventilation channel (11), and the pressure plate (14) is a fan-shaped plate with an L-shaped cross section. The pressure plate (14) is a blocking part, and the pressure plate (14) completely covers the ventilation channel (11) in a vertical projection.

7. The device for preventing exhaust gas backflow from a diesel generator set according to claim 6, characterized in that: The upper surface of the ventilation ring (10) gradually rises from the inside to the outside to form a slope, and a filter screen (15) is fixedly installed on the surface of the ventilation channel (11).

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