Anaerobic tank methane collection leakage prevention device

Abstract

The utility model relates to biogas anti -leakage technical field discloses an anaerobic tank biogas collection anti -leakage device, including delivery pump, delivery pipe, valve, collection jar and expansion type sealing mechanism, the air inlet of delivery pump links with anaerobic tank through pipeline, the gas outlet of delivery pump links with collection jar through delivery pipe, is installed with valve on the delivery pipe, and expansion type sealing mechanism is connected between delivery pipe and valve. The utility model discloses through inside and outside double expansion type sealing, and the sealing effect is better, and it has pressure compensation function, prevents the leakage that the shrinkage of low temperature brought.

Description

Technical Field

[0001] This utility model relates to the field of biogas leakage prevention technology, and in particular to a biogas collection and leakage prevention device for anaerobic ponds. Background Technology

[0002] Anaerobic digesters produce biogas during fermentation, which is typically collected for use. Common biogas collection equipment includes pumps, pipes, valves, and storage tanks. Generally, pipe and valve connections use a single-layer seal from the inside with a sealing ring, which is not sufficiently reliable. In cold weather, the sealing ring contracts, easily creating gaps and causing leaks. Therefore, there is an urgent need to develop an anaerobic digester biogas collection leak-proof device that uses a double-expansion seal (internal and external) for better sealing, with pressure compensation to prevent leaks caused by low-temperature contraction. This would overcome the shortcomings of current applications and meet current needs. Utility Model Content

[0003] The purpose of this invention is to provide a biogas collection and leakage prevention device for anaerobic ponds to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anaerobic digester biogas collection and leak-proof device includes a delivery pump, a delivery pipe, a valve, a collection tank, and an expansion sealing mechanism. The inlet of the delivery pump is connected to the anaerobic digester via a pipe, and the outlet of the delivery pump is connected to the collection tank via the delivery pipe. A valve is installed on the delivery pipe, and an expansion sealing mechanism connects the delivery pipe and the valve. The expansion sealing mechanism includes an outer expansion sealing ring, an inner expansion sealing ring, a pressure compensation pipe, a piston, and a spring. The inner expansion sealing ring is fixed inside the outer expansion sealing ring and the two are interconnected. The inner expansion sealing ring is inserted between the contact surfaces of the delivery pipe and the valve. The outer expansion sealing ring is fitted to the outer side of the contact surface of the delivery pipe and the valve. The pressure compensation pipe is fixed to the outer expansion sealing ring and is interconnected with it. The volume of the outer expansion sealing ring is five times the volume of the pressure compensation pipe. The pressure compensation pipe is made of rigid plastic, and a piston is slidably installed inside the pressure compensation pipe. The piston is elastically connected to the inner wall of the pressure compensation pipe via a spring. The outer expansion sealing ring, the inner expansion sealing ring, and the pressure compensation pipe are all filled with high-pressure gas.

[0006] Preferably, the delivery pipe and the valve are detachably fixed together by bolts and nuts.

[0007] Preferably, both the outer expansion sealing ring and the inner expansion sealing ring are made of fluororubber.

[0008] Preferably, a first air inlet pipe is fixed to and connected to the external expansion sealing ring, and a first one-way valve is installed on the first air inlet pipe.

[0009] Preferably, a second air inlet pipe is fixedly connected to the pressure compensation pipe, and a second one-way valve is installed on the second air inlet pipe.

[0010] The beneficial effects of this utility model are as follows: When using this anaerobic digester biogas collection and leak-proof device, the inner expansion sealing ring is inserted between the contact surfaces of the conveying pipe and the valve, and the outer expansion sealing ring is attached to the outer side of the contact surfaces of the conveying pipe and the valve. The conveying pipe and the valve are then fixed together with bolts and nuts. An inflation device is then used to inflate both the outer and inner expansion sealing rings from the first air inlet pipe. This ensures that the inner and outer expansion sealing rings, after expansion, tightly adhere to the inner side of the conveying pipe and the valve, achieving a double seal. Finally, air is injected into the pressure compensation pipe from the second air inlet pipe, ensuring the pressure compensation... The pressure inside the pressure compensation tube and the outer expansion sealing ring is the same. In cold weather, because the volume of the outer expansion sealing ring is five times that of the pressure compensation tube, the air inside the outer expansion sealing ring is more affected by the "contraction" phenomenon. The pressure drop inside the outer expansion sealing ring is greater than the pressure drop inside the pressure compensation tube, resulting in a pressure difference between the pressure inside the pressure compensation tube and the pressure inside the outer expansion sealing ring. This pressure difference causes the piston inside the pressure compensation tube to be squeezed downwards, compressing the air inside the outer expansion sealing ring, thereby increasing the air pressure inside the outer expansion sealing ring and reducing the volume shrinkage of both the outer and inner expansion sealing rings due to cold contraction, preventing leakage. In summary, this invention, through double expansion sealing, provides a better sealing effect and has a pressure compensation function, preventing leakage caused by low-temperature contraction. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a partial structural schematic diagram of the present invention.

[0013] Figure 3 This utility model Figure 2 A diagram illustrating the split state.

[0014] Figure 4 This is a perspective view of the expansion sealing mechanism in this utility model.

[0015] Figure 5 This is an internal cross-sectional view of the expansion sealing mechanism in this utility model.

[0016] Legend:

[0017] 1. Delivery pump; 2. Delivery pipe; 3. Valve; 4. Collection tank; 5. Expansion sealing mechanism; 501. External expansion sealing ring; 5011. First air inlet pipe; 5012. First one-way valve; 502. Internal expansion sealing ring; 503. Pressure compensation pipe; 5031. Second air inlet pipe; 5032. Second one-way valve; 504. Piston; 505. Spring. Detailed Implementation

[0018] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Specific implementation examples are given below.

[0020] See Figures 1-5 In this embodiment of the utility model, an anaerobic digester biogas collection and leak prevention device includes a delivery pump 1, a delivery pipe 2, a valve 3, a collection tank 4, and an expansion sealing mechanism 5. The air inlet of the delivery pump 1 is connected to the anaerobic digester through a pipe, and the air outlet of the delivery pump 1 is connected to the collection tank 4 through the delivery pipe 2. The collection tank 4 is used to collect and store biogas. The valve 3 is installed on the delivery pipe 2, and the delivery pipe 2 and the valve 3 are detachably fixed by bolts and nuts. An expansion sealing mechanism 5 is connected between the delivery pipe 2 and the valve 3 to prevent air leakage at the connection between the delivery pipe 2 and the valve 3.

[0021] The expansion sealing mechanism 5 includes: an outer expansion sealing ring 501, an inner expansion sealing ring 502, a pressure compensation tube 503, a piston 504, and a spring 505. The inner expansion sealing ring 502 is fixed to the inner side of the outer expansion sealing ring 501 and the two are interconnected. Both the outer expansion sealing ring 501 and the inner expansion sealing ring 502 are made of fluororubber. The inner expansion sealing ring 502 is inserted between the contact surfaces of the delivery pipe 2 and the valve 3, and the outer expansion sealing ring 501 is attached to the outer side of the contact surface of the delivery pipe 2 and the valve 3, thereby achieving double sealing. The pressure compensation tube 503 is fixed to the outer expansion sealing ring 501 and is interconnected with it. The volume of the outer expansion sealing ring 501 is five times the volume of the pressure compensation tube 503. The pressure compensation tube 503 is made of rigid plastic, and a piston 504 is slidably installed inside the pressure compensation tube 503. The piston 504 is elastically connected to the inner wall of the pressure compensation tube 503 through a spring 505. The expansion sealing ring 501, the inner expansion sealing ring 502, and the pressure compensation pipe 503 are all filled with high-pressure gas. At normal temperature, the gas pressure inside the outer expansion sealing ring 501 is the same as that inside the pressure compensation pipe 503. However, in cold weather, since the volume of the outer expansion sealing ring 501 is five times that of the pressure compensation pipe 503, the air inside the outer expansion sealing ring 501 is more affected by the "cold contraction" phenomenon. The pressure drop inside the outer expansion sealing ring 501 is greater than the pressure drop inside the pressure compensation pipe 503, resulting in a pressure difference between the pressure compensation pipe 503 and the outer expansion sealing ring 501. Under the action of this pressure difference, the piston 504 inside the pressure compensation pipe 503 is squeezed downwards, compressing the air inside the outer expansion sealing ring 501. This increases the gas pressure inside the outer expansion sealing ring 501, reduces the volume shrinkage of the outer expansion sealing ring 501 and the inner expansion sealing ring 502 under the cold contraction phenomenon, and prevents air leakage.

[0022] An external expansion sealing ring 501 is fixed with a first air inlet pipe 5011 connected to it. A first one-way valve 5012 is installed on the first air inlet pipe 5011. The first one-way valve 5012 ensures that air can only enter the external expansion sealing ring 501 through the first one-way valve 5012, and vice versa. A second air inlet pipe 5031 is fixed with a pressure compensation pipe 503 and connected to it. A second one-way valve 5032 is installed on the second air inlet pipe 5031. The second one-way valve 5032 ensures that air can only enter the pressure compensation pipe 503 through the second one-way valve 5032, and vice versa.

[0023] Working Principle: This anaerobic digester biogas collection and leak-proof device works by inserting the inner expansion sealing ring 502 between the contact surfaces of the conveying pipe 2 and the valve 3, and attaching the outer expansion sealing ring 501 to the outside of the contact surfaces of the conveying pipe 2 and the valve 3. The conveying pipe 2 and the valve 3 are then secured together with bolts and nuts. An inflation device is then used to inflate the outer expansion sealing ring 501 and the inner expansion sealing ring 502 from the first air inlet pipe 5011. This inflates the inner expansion sealing ring 502 tightly against the inside of the conveying pipe 2 and the valve 3, and the outer expansion sealing ring 501 tightly against the inside of the conveying pipe 2 and the valve 3, achieving a double seal. Then, air is inflated from the second air inlet pipe 5031 into the pressure compensation pipe 503, causing the pressure compensation pipe 503 to... The air pressure inside the external expansion seal ring 501 is the same. When encountering low temperatures, since the volume of the external expansion seal ring 501 is five times the volume of the pressure compensation pipe 503, the air inside the external expansion seal ring 501 is more affected by the "cold contraction" phenomenon. The pressure drop inside the external expansion seal ring 501 is greater than the pressure drop inside the pressure compensation pipe 503. This results in the pressure difference between the pressure compensation pipe 503 and the external expansion seal ring 501. Under the action of the pressure difference, the piston 504 inside the pressure compensation pipe 503 is squeezed downward, thereby compressing the air inside the external expansion seal ring 501. This increases the air pressure inside the external expansion seal ring 501, reduces the volume reduction of the external expansion seal ring 501 and the internal expansion seal ring 502 under the cold contraction phenomenon, and prevents air leakage.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A biogas collection and leakage prevention device for anaerobic digesters, characterized in that, The system includes a delivery pump (1), a delivery pipe (2), a valve (3), a collection tank (4), and an expansion sealing mechanism (5). The air inlet of the delivery pump (1) is connected to the anaerobic tank through a pipe, and the air outlet of the delivery pump (1) is connected to the collection tank (4) through the delivery pipe (2). A valve (3) is installed on the delivery pipe (2), and an expansion sealing mechanism (5) is connected between the delivery pipe (2) and the valve (3). The expansion sealing mechanism (5) includes an outer expansion sealing ring (501), an inner expansion sealing ring (502), a pressure compensation pipe (503), a piston (504), and a spring (505). The inner expansion sealing ring (502) is fixed inside the outer expansion sealing ring (501), and the two are interconnected. 02) Inserted between the contact surfaces of the delivery pipe (2) and the valve (3), the outer expansion sealing ring (501) is attached to the outside of the contact surface of the delivery pipe (2) and the valve (3), the pressure compensation pipe (503) is fixed on the outer expansion sealing ring (501) and communicates with it, the volume of the outer expansion sealing ring (501) is five times the volume of the pressure compensation pipe (503), the pressure compensation pipe (503) is made of hard plastic, a piston (504) is slidably installed inside the pressure compensation pipe (503), the piston (504) is elastically connected to the inner wall of the pressure compensation pipe (503) through a spring (505), and the outer expansion sealing ring (501), the inner expansion sealing ring (502) and the pressure compensation pipe (503) are all filled with high-pressure gas.

2. The anaerobic digester biogas collection and leakage prevention device according to claim 1, characterized in that, The delivery pipe (2) and the valve (3) are detachably fixed together by bolts and nuts.

3. The anaerobic digester biogas collection and leakage prevention device according to claim 1, characterized in that, Both the outer expansion sealing ring (501) and the inner expansion sealing ring (502) are made of fluororubber.

4. The anaerobic digester biogas collection and leakage prevention device according to claim 1, characterized in that, The outer expansion sealing ring (501) is fixed with a first air inlet pipe (5011) that is connected to it, and a first one-way valve (5012) is installed on the first air inlet pipe (5011).

5. The anaerobic digester biogas collection and leakage prevention device according to claim 1, characterized in that, The pressure compensation pipe (503) is fixed with a second air inlet pipe (5031) connected thereto, and a second one-way valve (5032) is installed on the second air inlet pipe (5031).

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