Negative pressure deodorization gravity sewage device

Abstract

The utility model relates to a kind of negative pressure deodorization gravity sewage device, including first sewage pipeline, second sewage pipeline, air duct, the head of the first sewage pipeline is connected with the tail of second sewage pipeline, the tail of air duct is communicated, the tail of the first sewage pipeline is communicated with slaughterhouse deodorization system, the head of the second sewage pipeline is communicated with one side of slaughterhouse scraping pit bottom, the head of air duct vertically extends to slaughter workshop, axial flow fan in air duct is installed, air in slaughter workshop is sent into the first sewage pipeline, double convex surface self-opening and closing valve plate is installed in the head of the first sewage pipeline, liquid level switch is installed in the tail of the second sewage pipeline, liquid level switch is connected with the controller of axial flow fan by delay circuit.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology in slaughterhouses, and in particular to a negative pressure odor-proof gravity sewage discharge device. Background Technology

[0002] The dehairing pit in a slaughterhouse is a critical area for processing animal hides and fur. The processes of scalding the hair with high-temperature water and decomposing organic matter generate large amounts of foul-smelling gases such as hydrogen sulfide and ammonia, accompanied by the accumulation of a mixture of hair, grease, and wastewater. Traditional dehairing pits have the following drawbacks: their open or simply covered structures cannot effectively prevent the spread of odors, affecting worker health and the air quality inside and outside the slaughterhouse; reliance on power pumps for wastewater discharge makes them prone to clogging by hair and grease; and single negative pressure or gravity-based wastewater discharge devices cannot effectively address both odor prevention and wastewater discharge. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide a negative pressure odor prevention gravity sewage discharge device.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0005] A negative pressure odor-proof gravity sewage discharge device includes a first sewage discharge pipe, a second sewage discharge pipe, and an exhaust pipe. The head of the first sewage discharge pipe is connected to the tail of the second sewage discharge pipe and the tail of the exhaust pipe. The tail of the first sewage discharge pipe is connected to the deodorization system of a slaughterhouse. The head of the second sewage discharge pipe is connected to one side of the bottom of the slaughterhouse's scraping pit. The head of the exhaust pipe extends vertically upward into the slaughterhouse. An axial flow fan is installed in the exhaust pipe to deliver air from the slaughterhouse into the first sewage discharge pipe. A double-convex self-opening and closing valve plate is installed on the inner side of the head of the first sewage discharge pipe. A liquid level switch is installed at the tail of the second sewage discharge pipe. The liquid level switch is connected to the controller of the axial flow fan through a delay circuit.

[0006] The top of the air duct is equipped with a single convex air inlet hood, and the convex side of the single convex air inlet hood faces downward.

[0007] The second sewage pipe slopes downward from the slaughterhouse scraping pit toward the first sewage pipe, and the slope of the second sewage pipe is at least 5%.

[0008] The inner walls of the first sewage pipe, the inner walls of the second sewage pipe, and the surface of the double-convex self-opening and closing valve plate are respectively provided with superhydrophobic coatings.

[0009] The delay circuit includes a time delay relay. The input circuit of the time delay relay is connected to the signal output terminal of the liquid level switch via a wire, and the output circuit of the time delay relay is connected to the controller of the axial flow fan via a wire.

[0010] The level switch is a normally open level switch.

[0011] The bottom of the double-convex self-opening and closing valve plate is equipped with a stainless steel counterweight.

[0012] The beneficial effects of this utility model are:

[0013] This negative pressure odor-proof gravity sewage discharge device combines negative pressure odor discharge with gravity sewage discharge, preventing odor from spreading in the slaughterhouse and improving the air environment in the slaughterhouse. Gravity sewage discharge avoids the use of power pumps; and a double convex self-opening and closing valve plate is set to prevent sewage in the first sewage discharge pipe from flowing back to the second sewage discharge pipe. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the negative pressure odor prevention gravity sewage discharge device with the double convex self-opening and closing valve plate in a vertical state in this utility model.

[0016] Figure 2 This is a schematic diagram of the negative pressure odor prevention gravity sewage discharge device with the double convex self-opening and closing valve plate in a horizontal state in this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the axial flow fan installed on the exhaust duct in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the double-convex self-opening and closing valve plate in this utility model;

[0019] Explanation of the numbers in the diagram: 1. First sewage pipe; 2. Second sewage pipe; 3. Exhaust pipe; 4. Axial flow fan; 5. Double convex self-opening and closing valve plate; 6. Hinge shaft; 7. Liquid level switch; 8. Single convex air inlet hood; 9. Time delay relay; 10. Stainless steel counterweight; 100. Slaughterhouse deodorization system; 200. Slaughterhouse scraping pit; 300. Slaughterhouse workshop. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 4As shown, a negative pressure odor-proof gravity sewage discharge device includes a first sewage discharge pipe 1, a second sewage discharge pipe 2, and an exhaust pipe 3. The head of the first sewage discharge pipe 1 is connected to the tail of the second sewage discharge pipe 2 and the tail of the exhaust pipe 3.

[0022] The tail end of the first sewage pipe 1 is connected to the deodorization system 100 of the slaughterhouse. A double-convex self-closing valve plate 5 is installed on the inner side of the head of the first sewage pipe 1. A hinge shaft 51 is provided on each side of the double-convex self-closing valve plate 5. The hinge shaft is hinged to the hinge hole opened on the inner side of the head of the first sewage pipe 1, so that the double-convex self-closing valve plate 5 can be flipped in the first sewage pipe 1. A stainless steel counterweight 9 is installed at the bottom of the double-convex self-closing valve plate 5. Under the action of negative pressure attraction generated by the absence of water flow impact force and airflow, the double-convex self-closing valve plate 5 can be flipped to a vertical state under the gravity of the stainless steel counterweight 9.

[0023] When the double-convex self-opening and closing valve plate 5 is in a vertical position, the stainless steel counterweight 9 is in contact with the bottom inner side of the first sewage pipe 1; when the double-convex self-opening and closing valve plate 5 is in a horizontal position, the top of the double-convex self-opening and closing valve plate 5 is in contact with the tail end of the second sewage pipe 2.

[0024] The head of the second sewage pipe 2 is connected to the bottom side of the slaughterhouse scraping pit 200. The second sewage pipe 2 slopes downward from the slaughterhouse scraping pit 200 toward the first sewage pipe 1, and the slope of the second sewage pipe 2 is at least 5%, so as to drain the sewage in the slaughterhouse scraping pit 200 and avoid some sewage remaining in the slaughterhouse scraping pit 200, which would lead to bacterial growth.

[0025] The head of the exhaust duct 3 extends vertically upward into the slaughterhouse 300. An axial flow fan 4 is installed in the exhaust duct 3 to send air from the slaughterhouse 300 into the first sewage pipe 1. A single convex air inlet hood 7 is installed at the top of the exhaust duct 3, and the convex surface of the single convex air inlet hood 7 faces downward.

[0026] 4. Select a variable frequency axial flow fan, with the air velocity controlled between 0.5 and 1 m / s.

[0027] A level switch 6 is installed at the end of the second sewage pipe 2. The level switch 6 is connected to the controller of the axial flow fan 4 via a time delay circuit. Specifically, the time delay circuit includes a time delay relay 8. The input circuit of the time delay relay 8 is connected to the signal output terminal of the level switch 6 via a wire, and the output circuit of the time delay relay 8 is connected to the controller of the axial flow fan 4 via a wire. The level switch 6 is a normally open level switch.

[0028] The delay time of the time delay relay 8 is in the range of 3 to 6 minutes, with 5 minutes being the best, in order to remove the odor from the slaughterhouse scraping pit 200 as much as possible.

[0029] The inner walls of the first sewage pipe 1, the second sewage pipe 2, and the surface of the double-convex self-opening and closing valve plate 5 are respectively provided with superhydrophobic coatings. The superhydrophobic coatings reduce the adhesion of grease to the inner walls of the first sewage pipe 1, the second sewage pipe 2, and the surface of the double-convex self-opening and closing valve plate 5.

[0030] In this embodiment, the superhydrophobic coating is a polytetrafluoroethylene coating.

[0031] When there is wastewater in the slaughterhouse scraping pit, the wastewater enters the first drain pipe through the second drain pipe, pushing the lower part of the double-convex self-opening and closing valve plate towards the slaughterhouse deodorization system 100, causing the double-convex self-opening and closing valve plate to flip. The wastewater flows into the slaughterhouse deodorization system along the first drain pipe. At the same time, the wastewater triggers the liquid level sensor to send a control signal to the axial flow fan. The axial flow fan works to send air from the slaughterhouse into the exhaust duct and blow it into the first drain pipe. On the one hand, it directly sends the odorous air from the slaughterhouse into the slaughterhouse deodorization system. On the other hand, it uses the principle of pneumatic conveying to send the odorous air from the slaughterhouse scraping pit into the slaughterhouse deodorization system through the second drain pipe.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A negative pressure odor-proof gravity sewage discharge device, characterized in that: The system includes a first sewage pipe, a second sewage pipe, and an exhaust duct. The head of the first sewage pipe is connected to the tail of the second sewage pipe and the tail of the exhaust duct. The tail of the first sewage pipe is connected to the deodorization system of the slaughterhouse. The head of the second sewage pipe is connected to one side of the bottom of the slaughterhouse's scraping pit. The head of the exhaust duct extends vertically upward into the slaughterhouse. An axial flow fan is installed in the exhaust duct to deliver air from the slaughterhouse into the first sewage pipe. A double-convex self-closing valve plate is installed on the inner side of the head of the first sewage pipe. A liquid level switch is installed at the tail of the second sewage pipe. The liquid level switch is connected to the controller of the axial flow fan through a delay circuit.

2. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: The top of the air duct is equipped with a single convex air inlet hood, and the convex side of the single convex air inlet hood faces downward.

3. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: The second sewage pipe slopes downward from the slaughterhouse scraping pit toward the first sewage pipe, and the slope of the second sewage pipe is at least 5%.

4. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: The inner walls of the first sewage pipe, the inner walls of the second sewage pipe, and the surface of the double-convex self-opening and closing valve plate are respectively provided with superhydrophobic coatings.

5. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: The delay circuit includes a time delay relay. The input circuit of the time delay relay is connected to the signal output terminal of the liquid level switch via a wire, and the output circuit of the time delay relay is connected to the controller of the axial flow fan via a wire.

6. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: The level switch is a normally open level switch.

7. The negative pressure odor-proof gravity sewage discharge device according to claim 1, characterized in that: A stainless steel counterweight is installed at the bottom of the double-convex self-opening and closing valve plate.

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