Self-weight type water seal device and anaerobic fermentation tank
By using a self-weight water seal device made of stainless steel, which is installed on the top of the anaerobic fermenter by its own weight, the problem of complex assembly of existing water seal devices is solved, and the effects of simplified assembly and improved durability are achieved.
Patent Information
- Application Number
- CN202422692227.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-05
AI Technical Summary
The existing water seal device is too light to achieve a seal with the water tank of the anaerobic fermenter by its own weight, resulting in a complex and difficult assembly structure.
The self-weight water seal device, made of stainless steel, is installed on the top of the anaerobic digester by its own weight. It is equipped with biogas interface, positive and negative pressure protector interface and gas sampling port, simplifying the assembly structure.
This simplifies the assembly of the water seal device, reduces assembly difficulty and cost, and improves the device's durability and sealing effect.
Smart Images
Figure CN223522496U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of water seal, and more particularly relates to a self-weight type water seal device and an anaerobic fermentation tank. BACKGROUND
[0002] In order to prevent biogas leakage, the anaerobic fermentation tank is generally provided with a water seal device at the top. However, the weight of the existing water seal device is relatively light, and the water seal device cannot rely on its own gravity to realize sealing with the water tank of the anaerobic fermentation tank. Therefore, the water seal device needs to be locked on the top of the anaerobic fermentation tank through a locking structure, resulting in a complex structure and difficult assembly. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the embodiment of the application is to provide a self-weight type water seal device and an anaerobic fermentation tank, so as to solve the technical problem of the complex assembly structure of the water seal device in the prior art, which leads to difficult assembly.
[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is to provide a self-weight type water seal device for preventing biogas leakage by being installed on the top of an anaerobic fermentation tank. The self-weight type water seal device comprises a water seal body and a cover plate. The top center of the water seal body is provided with a maintenance opening. The cover plate is arranged on the maintenance opening and is locked through a fastener. The water seal body and the cover plate are both made of stainless steel material. The circumferential sidewall of the water seal body is further provided with a biogas interface, a positive and negative pressure protector interface and a gas sampling port. The biogas interface is used for connecting an external biogas tank. The positive and negative pressure protector interface is used for connecting an external positive and negative pressure protector. The gas sampling interface is used for sampling and detecting the gas generated in the anaerobic fermentation tank.
[0005] In some embodiments, the circumferential sidewall of the water seal body is further provided with a flushing interface for flushing the anaerobic fermentation tank and a pressure detection port for detecting the pressure inside the anaerobic fermentation tank.
[0006] In some embodiments, the water seal body is in a cylindrical shape. The biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port are sequentially and spacedly distributed along the circumference of the water seal body, and are all located at the same height position of the water seal body.
[0007] In some embodiments, the biogas interface, the positive and negative pressure protector interface, the flushing interface and the pressure detection port are sequentially and equally spacedly arranged along the circumference of the water seal body. Along the circumference of the water seal body, the gas sampling port is located at the intermediate position between the positive and negative pressure protector interface and the flushing interface.
[0008] In some embodiments, the water seal body corresponds to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, each of which extends outwardly with an extension pipe, and the extension pipe is fixedly sleeved with a connecting flange.
[0009] In some embodiments, the water seal body corresponds to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, each of which extends outwardly with an extension pipe, and the extension pipe is fixedly sleeved with a connecting flange.
[0010] In some embodiments, the water seal body corresponds to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, each of which extends outwardly with an extension pipe, and the extension pipe is fixedly sleeved with a connecting flange.
[0011] In some embodiments, the water seal body includes a top plate, a lower surrounding plate and an upper surrounding plate; the top plate has a central hole, the lower surrounding plate extends vertically downward from the lower side periphery of the top plate, and the upper surrounding plate extends vertically upward from the position of the top plate corresponding to the central hole; the cover plate is arranged on the upper surrounding plate and is locked by a plurality of circumferentially distributed fasteners; the biogas interface, the positive and negative pressure protector interface and the gas sampling port are formed in the lower surrounding plate.
[0012] In some embodiments, the water seal body corresponds to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, each of which extends outwardly with an extension pipe, and the extension pipe is fixedly sleeved with a connecting flange.
[0013] In some embodiments, the water seal body corresponds to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, each of which extends outwardly with an extension pipe, and the extension pipe is fixedly sleeved with a connecting flange.
[0014] The self-weight type water seal device and the anaerobic fermentation tank provided by the application have the beneficial effects that: the water seal body and the cover plate are made of stainless steel material, so that the weight of the self-weight type water seal device is larger than that of the self-weight type water seal device made of concrete, the self-weight type water seal device can be assembled on the top of the anaerobic fermentation tank by its own gravity, without the need of locking by the locking structure, the assembly structure of the self-weight type water seal device is simplified, the assembly process of the self-weight type water seal device is simpler, the cost is cheaper, and the self-weight type water seal device is durable. Meanwhile, the biogas interface, the positive and negative pressure protector interface and the gas sampling port are arranged on the water seal body, the size of the self-weight type water seal device relative to the tank body is much smaller, the manufacturing process of the self-weight type water seal device is simpler, so that the biogas interface, the positive and negative pressure protector interface and the gas sampling port do not need to be arranged in the tank body of the anaerobic fermentation tank, the structure and the manufacturing difficulty of the tank body are simplified. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0016] Figure 1 A side structure schematic view of the self-weight type water seal device provided by the embodiments of the application;
[0017] Figure 2 Another side structure schematic view of the self-weight type water seal device provided by the embodiments of the application;
[0018] Figure 3 A top view structure schematic view of the self-weight type water seal device provided by the embodiments of the application;
[0019] Figure 4 A structure schematic view of the hanging ear in the self-weight type water seal device provided by the embodiments of the application.
[0020] In the drawings, various reference signs represent:
[0021] 1. The self-weight type water seal device; 100. water seal body; 110. top plate; 111. center hole; 120. lower surrounding plate; 121. biogas interface; 122. positive and negative pressure protector interface; 123. gas sampling port; 124. flushing interface; 125. pressure detection port; 126. hanging ear; 1261. hanging hole; 127. extension pipe; 128. inner extension pipe; 1281. horizontal section; 1282. vertical section; 129. reinforcing arm; 130. upper surrounding plate; 131. maintenance port; 140. locking plate; 200. cover plate; 210. handle; 300. fastener; 400. connecting flange; 2. tank body; 21. annular water tank. DETAILED DESCRIPTION
[0022] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0025] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0026] Please refer to Figures 1 to 3 The self-weight type water seal device 1 provided by the embodiments of the present application will be described. The self-weight type water seal device 1 is used to be installed on the top of the anaerobic fermentation tank to prevent biogas leakage.
[0027] The self-weight type water seal device 1 comprises a water seal body 100 and a cover plate 200, the top center of the water seal body 100 is provided with a maintenance opening 131, the cover plate 200 is covered on the maintenance opening 131 and is locked by a fastener 300, and the water seal body 100 and the cover plate 200 are both made of stainless steel material; the circumferential wall of the water seal body 100 is further provided with a biogas interface 121, a positive and negative pressure protector interface 122 and a gas sampling opening 123, wherein the biogas interface 121 is used for connecting an external biogas tank, the positive and negative pressure protector interface 122 is used for connecting an external positive and negative pressure protector, and the gas sampling interface is used for sampling and detecting the gas generated in the anaerobic fermentation tank.
[0028] When the self-weight type water seal device 1 is assembled to the top of the tank body 2 of the anaerobic fermentation tank, only the bottom end of the water seal body 100 is inserted into the annular water groove 21 of the tank body 2, and the self-weight type water seal device 1 is sealed and assembled to the top of the tank body 2 by the self-weight of the self-weight type water seal device 1.
[0029] It should be noted that the maintenance opening 131 is used for workers to drill into the anaerobic fermentation tank to maintain the structure inside the anaerobic fermentation tank, and the size of the maintenance opening 131 is generally designed to be able to drill into an adult. For example, the inner diameter of the maintenance opening 131 can be set to 800 mm, and of course the maintenance opening 131 can be set to be greater than or less than 800 mm, as long as the workers can drill in and the occupied area is not too large.
[0030] It should be noted that the biogas interface 121 is connected with an external biogas tank, the biogas generated by anaerobic fermentation in the anaerobic fermentation tank can be transported to the biogas tank through the biogas interface 121 for storage and subsequent use. The positive and negative pressure protector interface 122 is connected with an external positive and negative pressure protector, which is used for opening in an emergency, and can effectively release the biogas pressure and prevent the external air from being sucked into the anaerobic fermentation tank. The gas sampling opening 123 is used for sampling equipment to sample the gas generated in the anaerobic fermentation tank, so as to understand the composition and purity of the gas.
[0031] The self-weight type water seal device 1 in the embodiment of the present application is made of stainless steel material, so that the weight of the self-weight type water seal device 1 is larger than that of the water seal device made of concrete, and the self-weight type water seal device 1 can be assembled on the top of the anaerobic fermentation tank by its own gravity without the need of locking by the locking structure, which simplifies the assembly structure of the self-weight type water seal device 1 and makes the assembly process of the self-weight type water seal device 1 simpler and cheaper and more durable. Meanwhile, the biogas interface 121, the positive and negative pressure protector interface 122 and the gas sampling port 123 are arranged on the water seal body 100, and the size of the self-weight type water seal device 1 is much smaller than that of the tank body 2, so that the self-weight type water seal device 1 is simpler in manufacturing process, and the biogas interface 121, the positive and negative pressure protector interface 122 and the gas sampling port 123 do not need to be arranged in the tank body 2 of the anaerobic fermentation tank, which simplifies the structure and manufacturing difficulty of the tank body 2.
[0032] In some embodiments, referring to Figure 2 and Figure 3 , the circumferential side wall of the water seal body 100 further has a flushing interface 124 for flushing the anaerobic fermentation tank. When foam is generated in the anaerobic fermentation process, the flushing device can be used to add cleaning liquid into the anaerobic fermentation tank through the flushing interface 124 to flush the foam in the anaerobic fermentation tank.
[0033] In some embodiments, referring to Figure 1 and Figure 3 , the circumferential side wall of the water seal body 100 further has a pressure detection port 125 for detecting the pressure inside the anaerobic fermentation tank. Specifically, the pressure detection port 125 is provided with a pressure detection gauge, which can be used to detect the pressure in the anaerobic fermentation tank in real time. When the pressure is too large, the positive and negative pressure protector can be used to release the pressure to ensure that the anaerobic fermentation tank always works within a preset pressure range and explosion does not occur due to too large pressure.
[0034] In some embodiments, referring to Figures 1 to 3 , the water seal body 100 is in a cylindrical shape, and the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125 are sequentially and spacedly arranged along the circumference of the water seal body 100 and are located at the same height position of the water seal body 100.
[0035] It should be noted that the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125 are located at the same height position of the water seal body 100 along the center line of the water seal body 100, that is, the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125 are located at the same height position of the water seal body 100 along the center line of the water seal body 100.
[0036] The above arrangement is that the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125 are arranged at intervals along the circumference of the water seal body 100, so as to facilitate the connection of the biogas tank, the positive and negative pressure protector, the sampling device, the flushing device and the pressure detection meter, etc. to the interfaces, avoid structural interference of the biogas tank, the positive and negative pressure protector, the sampling device, the flushing device and the pressure detection meter, and make the surface of the entire water seal body 100 neat and beautiful, and facilitate the manufacturing.
[0037] Alternatively, the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125 are located at the height positions of 1000mm, 1100mm, 1200mm, 1300mm and 1400mm along the axial direction of the water seal body 100. Specifically, the distance from the center line of each interface to the bottom end surface of the water seal body 100.
[0038] In some embodiments, referring to Figure 3 , the biogas interface 121, the positive and negative pressure protector interface 122, the flushing interface 124 and the pressure detection port 125 are arranged at intervals along the circumference of the water seal body 100; along the circumference of the water seal body 100, the gas sampling port 123 is located at the middle position between the positive and negative pressure protector interface 122 and the flushing interface 124.
[0039] Specifically, the biogas interface 121, the positive and negative pressure protector interface 122, the flushing interface 124 and the pressure detection port 125 are located at positions separated by 90 degrees along the circumference of the water seal body 100 in sequence, for example, when the biogas interface 121 and the flushing interface 124 face the front and back directions of the water seal body 100, the positive and negative pressure protector interface 122 and the pressure detection port 125 face the left and right directions of the water seal body 100 respectively. The gas sampling port 123 is located at a position rotated by 45 degrees from the positive and negative pressure protector interface 122.
[0040] In some embodiments, referring to Figures 1 to 3The water seal body 100 corresponds to the biogas interface 121, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124 and the pressure detection port 125, and each interface extends outwardly with an extension pipe 127, and the extension pipe 127 is fixedly sleeved with a connecting flange 400. The extension pipe 127 and the connecting flange 400 are arranged to facilitate the connection of each interface with external equipment, and avoid the uneven and unstable connection position caused by the circular outer peripheral wall of the water seal body 100.
[0041] Optionally, the length of the extension pipe 127 can be 80mm, 90mm, 100mm, 110mm, 120mm, etc.
[0042] In some embodiments, referring to Figure 2 and Figure 3 , the water seal body 100 corresponds to the flushing interface 124 and extends inwardly with an inner extension pipe 128, and the inner extension pipe 128 includes a horizontal section 1281 and a vertical section 1282. The horizontal section 1281 extends horizontally from the flushing interface 124 to the center of the water seal body 100, and the vertical section 1282 extends vertically downward from the horizontal section 1281. Through the arrangement of the inner extension pipe 128, the cleaning liquid input by the flushing equipment can be directly input into the tank body 2, achieving the effect of rapid flushing.
[0043] In addition, in order to ensure the structural strength of the inner extension pipe 128, the inner peripheral wall of the water seal body 100 is further connected with a reinforcing arm 129, the reinforcing arm 129 extends from the inner peripheral wall of the water seal body 100 to the horizontal section 1281 of the inner extension pipe 128 and is connected with the horizontal section 1281. The horizontal section 1281, the reinforcing arm 129 and the inner peripheral wall of the water seal body 100 form a triangle, forming a stable structure.
[0044] Optionally, referring to Figure 2 and Figure 3 , the length of the horizontal section 1281 is 600mm, the outer diameter of the water seal body 100 is 2000mm, and the inner diameter of the maintenance port 131 is 800mm. In this way, the arrangement of the horizontal section 1281 will not hinder the workers entering the tank body 2 through the maintenance port 131, and at the same time, the flushing liquid can be input into the center position of the tank body 2 as much as possible. Of course, in other embodiments, the length of the horizontal section 1281 can also be 400mm, 500mm, 600mm, 700mm or 800mm, etc., as long as it does not cause great hindrance to the workers during maintenance.
[0045] Optionally, the length of the vertical section 1282 can be 300mm, 400mm, 500mm, 600mm, 700mm, etc., as long as it does not extend into the lower end surface of the water seal body 100.
[0046] In some embodiments, referring to Figure 1 ,Figure 3 And Figure 4 The peripheral wall of the water seal body 100 is further provided with a plurality of hanging ears 126, the hanging ears 126 are lower than the pressure detection port 125; along the circumferential direction of the water seal body 100, the hanging ears 126 are located between the biogas interface 121 and the positive and negative pressure protector interface 122; and / or, the hanging ears 126 are located between the flushing interface 124 and the pressure detection port 125; and / or, the hanging ears 126 are located between the pressure detection port 125 and the biogas interface 121. Among them, the plurality of hanging ears 126 can realize the carrying and assembly of the self-weight type water seal device 1 through the hanging ears 126, and the circumferentially staggered arrangement of each hanging ear 126 and each interface can avoid structural interference with each interface during carrying. In addition, by uniformly distributing each hanging ear 126 along the circumferential direction of the water seal body 100, the self-weight type water seal device 1 can be stably carried, and tilting phenomenon during carrying can be avoided.
[0047] Optionally, the peripheral wall of the water seal body 100 is provided with three hanging ears 126, along the circumferential direction of the water seal body 100, the first hanging ear 126 is arranged at the middle position between the biogas interface 121 and the positive and negative pressure protector interface 122, the second hanging ear 126 is arranged at the middle position between the flushing interface 124 and the pressure detection port 125, and the third hanging ear 126 is arranged at the middle position between the pressure detection port 125 and the biogas interface 121, so that the biogas interface 121, the first hanging ear 126, the positive and negative pressure protector interface 122, the gas sampling port 123, the flushing interface 124, the second hanging ear 126, the flushing interface 124, the third hanging ear 126 and the pressure detection port 125 are arranged in sequence along the circumferential direction of the water seal body 100. Each structure is neat and does not interfere with each other.
[0048] Optionally, the height of the hanging ear 126 can be 900mm, 1000mm, 1100mm, 1200mm and 1300mm, etc.
[0049] Optionally, please refer to Figure 4 The hanging ear 126 includes a hanging hole 1261, the hanging rope or chain is penetrated through the hanging hole 1261, so that the self-weight type water seal device can be carried through the hanging rope or chain.
[0050] In some embodiments, please refer to Figure 1 And Figure 2, the water seal body 100 includes a top plate 110, a lower surrounding plate 120 and an upper surrounding plate 130, the top plate 110 has a central hole 111, the lower surrounding plate 120 extends vertically downward from the lower side of the top plate 110, and the upper surrounding plate 130 extends vertically upward from the position corresponding to the central hole 111 of the top plate 110; a maintenance opening 131 is an opening at the top of the upper surrounding plate 130, a cover plate 200 is arranged on the upper surrounding plate 130 and is locked by a plurality of fasteners 300 distributed in the circumferential direction; a biogas interface 121, a positive and negative pressure protector interface 122, a gas sampling opening 123, a flushing interface 124 and a pressure detection opening 125 are all formed in the lower surrounding plate 120. When assembled, the end of the lower surrounding plate 120 away from the top plate 110 is inserted into the annular water tank 21 of the tank body 2 to form a water seal. The above arrangement makes the water seal body 100 simple in structure, and the arrangement of the upper surrounding plate 130 facilitates the sealed and locked connection of the water seal body 100 and the cover plate 200.
[0051] Specifically, please refer to Figure 1 and Figure 2 The periphery of the upper surrounding plate 130 extends outward horizontally with a locking plate 140, and a periphery of the cover plate 200 is attached to the locking plate 140, and the periphery of the cover plate 200 has a plurality of first mounting holes arranged in sequence and spaced apart, and the locking plate 140 has a plurality of second mounting holes arranged in sequence and spaced apart in the circumferential direction, and each fastener 300 passes through the first mounting hole and the second mounting hole in sequence to lock and fix the cover plate 200 and the water seal body 100.
[0052] In addition, a sealing ring can also be abutted between the cover plate 200 and the locking plate 140, and the sealing connection of the cover plate 200 and the water seal body 100 is realized through the sealing ring.
[0053] In some embodiments, please refer to Figures 1 to 3 The side of the cover plate 200 away from the water seal body 100 is provided with a handle 210, and the cover plate 200 is carried through the handle 210. Specifically, the handle 210 has a through slot for the hand or tool of a worker to pass through, so as to facilitate carrying.
[0054] Optionally, the number of handles 210 is two, which facilitates the carrying of the cover plate 200 by the worker with both hands.
[0055] On the other hand, please refer to Figure 2 The application also provides an anaerobic fermentation tank, which comprises a tank body 2 and the above-mentioned self-weight type water seal device 1, and the self-weight type water seal device 1 is installed on the top of the tank body 2 to realize the sealing of the anaerobic fermentation tank.
[0056] Specifically, the top of the tank body 2 is provided with an annular water tank 21, the opening of the annular water tank 21 faces upward, and the annular water tank 21 contains a liquid. When assembled, the bottom end of the lower surrounding plate 120 of the water seal body 100 is inserted into the annular water tank 21, thereby forming a water seal.
[0057] The above descriptions are only the preferred embodiment of the present application, not intended to limit the present application. Any modification, equivalent replacement and improvement made within the principle and technical scope of the present application should be included in the protection scope of the present application.
Claims
1. A self-weight heavy water seal device for installation on the top of an anaerobic fermentation tank to prevent biogas leakage, characterized in that, The self-weight heavy water seal device comprises a water seal body and a cover plate, the top center of the water seal body is provided with a maintenance opening, the cover plate covers the maintenance opening and is locked by fasteners, the water seal body and the cover plate are made of stainless steel material; the peripheral wall of the water seal body is further provided with a biogas interface, a positive and negative pressure protector interface and a gas sampling port, wherein the biogas interface is used for connecting an external biogas tank, the positive and negative pressure protector interface is used for connecting an external positive and negative pressure protector, and the gas sampling interface is used for sampling and detecting the gas generated in the anaerobic fermentation tank.
2. The self-weighted water seal device of claim 1, wherein, The peripheral wall of the water seal body is further provided with a flushing interface for flushing the anaerobic fermentation tank and a pressure detection port for detecting the pressure inside the anaerobic fermentation tank.
3. The self-weighted water seal device of claim 2, wherein, The water seal body is in a cylindrical shape, and the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port are sequentially and spacedly distributed along the circumference of the water seal body and are located at the same height position of the water seal body.
4. The self-weighted water seal device of claim 3, wherein, The biogas interface, the positive and negative pressure protector interface, the flushing interface and the pressure detection port are sequentially and equally spacedly arranged along the circumference of the water seal body; along the circumference of the water seal body, the gas sampling port is located at the intermediate position between the positive and negative pressure protector interface and the flushing interface.
5. A self-weighted water seal device as claimed in any one of claims 2 to 4, wherein, The water seal body is externally extended with an extension pipe corresponding to the biogas interface, the positive and negative pressure protector interface, the gas sampling port, the flushing interface and the pressure detection port, and the extension pipe is fixedly sleeved with a connecting flange.
6. A self-weighted water seal device as claimed in any one of claims 2 to 4, wherein, The water seal body is internally extended with an inner extension pipe corresponding to the flushing interface, and the inner extension pipe comprises a horizontal section and a vertical section, the horizontal section extends horizontally from the flushing interface to the center of the water seal body, and the vertical section extends vertically downward from the horizontal section.
7. The self-weighted water seal device of claim 6, wherein, The inner peripheral wall of the water seal body is further connected with a reinforcing arm connected with the horizontal section, and the reinforcing arm, the horizontal section and the inner peripheral wall of the water seal body enclose a triangle.
8. The self-weight water sealing device according to any one of claims 1 to 4, wherein The water seal body comprises a top plate, a lower surrounding plate and an upper surrounding plate; the top plate is provided with a central hole, the lower surrounding plate extends vertically downward from the lower side periphery of the top plate, and the upper surrounding plate extends vertically upward from the position of the top plate corresponding to the central hole; the cover plate covers the upper surrounding plate and is locked by a plurality of fasteners distributed along the circumference; the biogas interface, the positive and negative pressure protector interface and the gas sampling port are formed in the lower surrounding plate.
9. The self-weighted water seal device according to claim 3 or 4, wherein The peripheral wall of the water seal body is further provided with a plurality of hanging ears, the hanging ears are lower than the pressure detection port; along the circumference of the water seal body, the hanging ears are located between the biogas interface and the positive and negative pressure protector interface; and / or, the hanging ears are located between the flushing interface and the pressure detection port; and / or, the hanging ears are located between the pressure detection port and the biogas interface.
10. An anaerobic fermentation tank, characterized by The self-weight heavy water seal device comprises a water seal body and a cover plate, the top center of the water seal body is provided with a maintenance opening, the cover plate covers the maintenance opening and is locked by fasteners, the water seal body and the cover plate are made of stainless steel material; the peripheral wall of the water seal body is further provided with a biogas interface, a positive and negative pressure protector interface and a gas sampling port, wherein the biogas interface is used for connecting an external biogas tank, the positive and negative pressure protector interface is used for connecting an external positive and negative pressure protector, and the gas sampling interface is used for sampling and detecting the gas generated in the anaerobic fermentation tank.