A two-way water seal device

Abstract

The present invention relates to the technical field of water seals, and specifically provides a two-way water seal device. In order to solve the problem that the two valves at the flue gas outlet pipe of the existing bag filter are prone to jamming, a new two-way water seal device is provided, which includes a first water seal assembly, a second water seal assembly, and a water seal cover barrel. The first water seal assembly includes a first water seal pipe, a second water seal pipe, and a third water seal pipe that are coaxially and vertically arranged from the inside out. The second water seal pipe is provided with a horizontal exhaust port. The second water seal assembly includes a fourth water seal pipe, a fifth water seal pipe, and a sixth water seal pipe that are coaxially and vertically arranged. When the second water seal assembly is vertically inserted into the first water seal assembly, the radial position of the fourth water seal pipe is between the first water seal pipe and the second water seal pipe, and the radial position of the fifth water seal pipe is between the second water seal pipe and the third water seal pipe. The water seal cover barrel is located between the fourth water seal pipe and the sixth water seal pipe. The present invention ingeniously uses multiple water seal assemblies in combination to achieve the discharge and sealing of gas.

Description

Technical Field

[0001] The present invention relates to the technical field of water seals, and specifically to a two-way water seal device. Background Art

[0002] In a carbon black production system, it is necessary to send the carbon black flue gas filtered by a bag filter to a desulfurization tower for desulfurization treatment. When production is abnormal, the carbon black flue gas needs to be discharged for emergency. Therefore, as Figure 1 shown, at the flue gas outlet pipe of the existing bag filter, there is a horizontally arranged flue gas grid connection valve and a vertically arranged emergency vent valve connected to the desulfurization tower. When production is normal, the flue gas needs to be discharged horizontally into the desulfurization tower. At this time, the emergency vent valve is closed and the flue gas grid connection valve is opened. When production is abnormal, the flue gas needs to be directly discharged vertically from the top. At this time, the emergency vent valve is opened and the flue gas grid connection valve is closed. Since the carbon black flue gas is corrosive, the emergency vent valve and the flue gas grid connection valve will become stuck if they are not actuated for a long time. When they need to be actuated, they cannot act in time, and the probability of being usable after maintenance is relatively low. As a result, the emergency vent valve and the flue gas grid connection valve will not only affect production efficiency, but also lead to high production costs due to frequent replacement.

[0003] Currently, in addition to valves, the structure with good sealing performance that can play a role in circulation and cut-off is the water seal structure. The conventional water seal structure is a U-shaped water seal. Since the height of the flue gas outlet pipe of the bag filter is 20 meters, if a U-shaped water seal is installed at a high place, it is difficult to install due to the high distance from the ground, high requirements for the connection strength, and difficult water replenishment; if the flue gas outlet pipe of the bag filter is led to the ground, passed through the water seal and then laid to a high place, there will be a problem of pipeline resistance. Summary of the Invention

[0004] In order to solve the problem that the two valves at the flue gas outlet pipe of the existing bag filter are prone to jamming, the present invention provides a new two-way water seal device.

[0005] The present invention is implemented by the following technical solutions:

[0006] A two-way water seal device includes a first water seal assembly, a second water seal assembly, and a water seal cover barrel;

[0007] The first water seal assembly includes a first water seal pipe, a second water seal pipe, and a third water seal pipe that are coaxially and vertically arranged in a nested manner from the inside out. The bottom opening edge of the second water seal pipe is fixedly sealed with the lower part of the outer circumferential surface of the first water seal pipe through a first lower annular sealing plate. When in use, a first layer of water seal is formed between the first water seal pipe and the second water seal pipe. The bottom opening edge of the third water seal pipe is fixedly sealed and connected with the middle part of the outer circumferential surface of the second water seal pipe through a first upper annular sealing plate. When in use, a second layer of water seal is formed between the second water seal pipe and the third water seal pipe. There is a lower axial distance between the bottom of the first upper annular sealing plate and the top opening of the first water seal pipe, and a horizontal exhaust port is provided in the part of the second water seal pipe located at the lower axial distance.

[0008] The second water seal assembly includes a fourth water seal pipe, a fifth water seal pipe, and a sixth water seal pipe that are coaxially and vertically arranged. The fifth water seal pipe is sleeved on the middle part of the fourth water seal pipe, and the top opening edge of the fifth water seal pipe is fixedly sealed with the middle part of the outer circumferential surface of the fourth water seal pipe through a second lower annular sealing plate. The sixth water seal pipe is sleeved on the upper part of the fourth water seal pipe, and the bottom opening edge of the sixth water seal pipe is fixedly sealed and connected with the upper part of the outer circumferential surface of the fourth water seal pipe through a second upper annular sealing plate. When in use, a third layer of water seal is formed between the sixth water seal pipe and the fourth water seal pipe, and there is an upper axial distance between the sixth water seal pipe and the fifth water seal pipe.

[0009] When the second water seal assembly is coaxially and vertically inserted into the first water seal assembly, the radial position of the fourth water seal pipe is between the first water seal pipe and the second water seal pipe, and the radial position of the fifth water seal pipe is between the second water seal pipe and the third water seal pipe. The open end of the water seal cover bucket (as is well known to those skilled in the art, the pipe has openings at both ends, and the bucket has an opening at one end) is arranged downward, and its radial position is between the fourth water seal pipe and the sixth water seal pipe. When the bottom opening of the fourth water seal pipe is above the horizontal exhaust port, the fifth water seal pipe is located in the second layer of water seal as a partition of the second layer of water seal. When the fourth water seal pipe is located in the first layer of water seal as a partition of the first layer of water seal, the fifth water seal pipe is located in the second layer of water seal as a partition of the second layer of water seal.

[0010] When in use, the operation steps are as follows: 1) Sealingly connect the flue gas outlet pipe of the bag filter with the bottom opening of the first water seal pipe; 2) Coaxially and vertically insert the second water seal assembly into the first water seal assembly so that the fourth water seal pipe is between the first water seal pipe and the second water seal pipe, and the fifth water seal pipe is between the second water seal pipe and the third water seal pipe; 3) Coaxially and vertically insert the water seal cover bucket between the fourth water seal pipe and the sixth water seal pipe; 4) Inject water so that a first layer of water seal is formed between the first water seal pipe and the second water seal pipe, a second layer of water seal is formed between the second water seal pipe and the third water seal pipe, and a third layer of water seal is formed between the sixth water seal pipe and the fourth water seal pipe.

[0011] Working principle: When the gas needs to be discharged horizontally, the second water seal assembly moves upward (the second water seal assembly can be moved upward manually or by other conventional means such as a winch, etc.), so that the bottom opening of the fourth water seal pipe is located above the horizontal exhaust port and the fifth water seal pipe is located in the second water seal as a partition of the second water seal. At this time, the horizontal exhaust port is communicated with the first water seal pipe, and the gas is discharged from the horizontal exhaust port; when the gas needs to be discharged vertically, the second water seal assembly moves downward so that the fifth water seal pipe is located in the second water seal as a partition of the second water seal, and the fourth water seal pipe is located in the first water seal as a partition of the first water seal. At this time, the horizontal exhaust port is not communicated with the first water seal pipe. At the same time, the water seal cover barrel moves upward until the water seal cover barrel is separated from the third water seal, and the gas is discharged from the top opening of the fourth water seal pipe.

[0012] Furthermore, the two-way water seal device further includes a lifting assembly. The lifting assembly includes an annular mounting plate fixed to the outer circumferential surface of the fourth water seal pipe at the upper axial distance part, two rotating assemblies respectively located on the upper left and right sides of the annular mounting plate, an external winch, and two fixed pulleys. Each rotating assembly includes a rotating rod, a support frame for supporting the rotating rod, and a linear driver. The support frame is located radially inside the linear driver and is vertically fixed to the annular mounting plate. The middle part of the rotating rod is hinged to the top end of the support frame, and the hinge axis is in the front-rear direction. An avoidance opening for avoiding the rotation of the rotating rod is provided on the support frame. One end of the rotating rod is provided with a bent part, and the other end of the rotating rod is provided with a chute part. When the rotating rod rotates to the horizontal direction, the chute part is arranged obliquely upward. The fixed end of the linear driver is hinged to the annular mounting plate, and the end of the telescopic end of the linear driver is hinged with a slider adapted to the chute part through a connecting rod. The included angle between the connecting rod and the telescopic end of the linear driver is an acute angle. Clamping parts adapted to the bent parts are provided at both left and right ends of the water seal cover barrel. A steel wire rope is fixed between the winch and the water seal cover barrel. One of the fixed pulleys is located directly above the winch, and the other fixed pulley is located directly above the water seal cover barrel and the two fixed pulleys are at the same height. When the rotating rod is in the vertical state, the diameter of the water seal cover barrel is smaller than the distance between the two opposite surfaces of the two bent parts. When the rotating rod rotates from the vertical state to the horizontal state, the two bent parts are just clamped on the clamping parts of the water seal cover barrel, so that when the water seal cover barrel moves upward, the water seal cover barrel drives the second water seal assembly to move upward.

[0013] During operation, when the gas needs to be discharged horizontally, the water seal cover bucket is located in the third water seal. The driving linear actuator is in the extended state, so that the clamping part of the water seal cover bucket catches the bent part of the rotating part. The driving winch is operated to move the second water seal assembly upward with the water seal cover bucket until the bottom opening of the fourth water seal pipe is above the horizontal exhaust port and the fifth water seal pipe is located in the second water seal as a partition of the second water seal. At this time, the gas is discharged from the horizontal exhaust port. When the gas needs to be discharged vertically, the driving winch is operated to move the water seal cover bucket and the second water seal assembly downward until the second water seal assembly moves downward so that the fifth water seal pipe is located in the second water seal as a partition of the second water seal and the fourth water seal pipe is located in the first water seal as a partition of the first water seal. The driving linear actuator is in the retracted state, so that the water seal cover bucket is disengaged from the bent part of the rotating part until the rotating rod is in the vertical state. The driving winch is operated again to move the water seal cover bucket upward until the water seal cover bucket is disengaged from the third water seal, and the gas is discharged from the top opening of the fourth water seal pipe.

[0014] The beneficial effects of the present invention are as follows: 1) The present invention ingeniously uses a two-way water seal to replace two valves, that is, multiple water seal assemblies are used in combination to achieve gas discharge and sealing; 2) The present invention realizes the possibility of using a water seal at a high place; 3) The method of opening or closing the gas outlet of the present invention is simple, that is, only the driving winch and the linear actuator need to be driven; 4) Without considering the evaporation of the water inside the water seal, the present invention can permanently not replenish water. Compared with the U-shaped water seal, it reduces the waste of water resources, and because there is no need for water inlet and outlet, it improves the maintenance efficiency and speeds up the operation switching speed. Brief Description of the Drawings

[0015] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic structural diagram of the prior art

[0018] Figure 2 Schematic structural diagram of the first water seal assembly

[0019] Figure 3 Schematic structural diagram of the second water seal assembly

[0020] Figure 4 Schematic structural diagram of the water seal cover bucket

[0021] Figure 5 Schematic diagram of the two-way water seal device in the present invention Figure 1 ;

[0022] Figure 6 Schematic diagram of the two-way water seal device in the present invention Figure 2 ;

[0023] Figure 7 Schematic diagram of the structure of the two-way water seal device with a lifting component in the present invention Figure 1 ;

[0024] Figure 8 Schematic diagram II of the structure of the two-way water seal device with a lifting component in the present invention;

[0025] Figure 9 Structural principle of the lifting component Figure 1 ;

[0026] Figure 10 Cross-sectional view of the support frame;

[0027] Figure 11 Structural principle of the lifting component Figure 2 .

[0028] In the figure: 1 - First water seal assembly, 101 - First water seal pipe, 102 - Second water seal pipe, 103 - Third water seal pipe, 104 - First lower annular sealing plate, 105 - First upper annular sealing plate, 106 - Horizontal exhaust port, 107 - First layer of water seal, 108 - Second layer of water seal, 2 - Second water seal assembly, 201 - Fourth water seal pipe, 202 - Fifth water seal pipe, 203 - Sixth water seal pipe, 204 - Second lower annular sealing plate, 205 - Second upper annular sealing plate, 206 - Third layer of water seal, 3 - Water seal cover barrel, 4 - Annular mounting plate, 5 - Winch, 6 - Fixed pulley, 7 - Steel wire rope, 8 - Rotating rod, 9 - Support frame, 10 - Linear actuator, 11 - Avoidance port, 12 - Bending part, 13 - Chute part, 14 - Slide block, 15 - Connecting rod, 16 - Clamping part. Embodiment

[0029] In order to more clearly understand the above objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. It should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] As Figures 2 to 10 shown, a two-way water seal device includes a first water seal assembly 1, a second water seal assembly 2, and a water seal cover barrel 3;

[0034] The first water seal assembly 1 includes a first water seal pipe 101, a second water seal pipe 102, and a third water seal pipe 103 that are sequentially sleeved and distributed from the inside to the outside and arranged coaxially and vertically. The bottom opening edge of the second water seal pipe 102 is hermetically fixed to the lower part of the outer circumferential surface of the first water seal pipe 101 through a first lower annular sealing plate 104. When in use, a first layer of water seal 107 is formed between the first water seal pipe 101 and the second water seal pipe 102. The bottom opening edge of the third water seal pipe 103 is hermetically fixed and connected to the middle part of the outer circumferential surface of the second water seal pipe 102 through a first upper annular sealing plate 105. When in use, a second layer of water seal 108 is formed between the second water seal pipe 102 and the third water seal pipe 103. There is a lower axial distance between the bottom of the first upper annular sealing plate 105 and the top opening of the first water seal pipe 101. A horizontal exhaust port 106 is provided at the part of the second water seal pipe 102 located at the lower axial distance.

[0035] The second water seal assembly 2 includes a fourth water seal pipe 201, a fifth water seal pipe 202, and a sixth water seal pipe 203 that are coaxially and vertically arranged. The fifth water seal pipe 202 is sleeved on the middle part of the fourth water seal pipe 201, and the edge of the top opening of the fifth water seal pipe 202 is hermetically fixed to the middle part of the outer circumferential surface of the fourth water seal pipe 201 through a second lower annular sealing plate 204. The sixth water seal pipe 203 is sleeved on the upper part of the fourth water seal pipe 201, and the edge of the bottom opening of the sixth water seal pipe 203 is hermetically fixed and connected to the upper part of the outer circumferential surface of the fourth water seal pipe 201 through a second upper annular sealing plate 205. When in use, a third layer of water seal 206 is formed between the sixth water seal pipe 203 and the fourth water seal pipe 201, and there is an upper axial distance between the sixth water seal pipe 203 and the fifth water seal pipe 202.

[0036] When the second water seal assembly 2 is coaxially and vertically inserted into the first water seal assembly 1, the radial position of the fourth water seal pipe 201 is located between the first water seal pipe 101 and the second water seal pipe 102, and the radial position of the fifth water seal pipe 202 is located between the second water seal pipe 102 and the third water seal pipe 103. The open end of the water seal cover bucket 3 (it is well known to those skilled in the art that a pipe has openings at both ends and a bucket has an opening at one end) is arranged downward, and its radial position is located between the fourth water seal pipe 201 and the sixth water seal pipe 203. When the bottom opening of the fourth water seal pipe 201 is above the horizontal exhaust port 106, the fifth water seal pipe 202 is located in the second layer of water seal 108 as a partition of the second layer of water seal 108. When the fourth water seal pipe 201 is located in the first layer of water seal 107 as a partition of the first layer of water seal 107, the fifth water seal pipe 202 is located in the second layer of water seal 108 as a partition of the second layer of water seal 108.

[0037] When in use, the operation steps are as follows: 1) Hermetically connect the flue gas outlet pipe of the bag filter to the bottom opening of the first water seal pipe 101; 2) Coaxially and vertically insert the second water seal assembly 2 into the first water seal assembly 1 so that the fourth water seal pipe 201 is located between the first water seal pipe 101 and the second water seal pipe 102, and the fifth water seal pipe 202 is located between the second water seal pipe 102 and the third water seal pipe 103; 3) Coaxially and vertically insert the water seal cover bucket 3 between the fourth water seal pipe 201 and the sixth water seal pipe 203; 4) Inject water so that a first layer of water seal 107 is formed between the first water seal pipe 101 and the second water seal pipe 102, a second layer of water seal 108 is formed between the second water seal pipe 102 and the third water seal pipe 103, and a third layer of water seal 206 is formed between the sixth water seal pipe 203 and the fourth water seal pipe 201.

[0038] Working principle: When the gas needs to be discharged horizontally, the second water seal assembly 2 moves upward (the second water seal assembly 2 can be moved upward manually or by other conventional means such as a hoist 5, etc.), so that the bottom opening of the fourth water seal pipe 201 is located above the horizontal exhaust port 106 and the fifth water seal pipe 202 is located in the second-layer water seal 108 as a partition of the second-layer water seal 108. At this time, the horizontal exhaust port 106 is communicated with the first water seal pipe 101, and the gas is discharged from the horizontal exhaust port 106; when the gas needs to be discharged vertically, the second water seal assembly 2 moves downward so that the fifth water seal pipe 202 is located in the second-layer water seal 108 as a partition of the second-layer water seal 108, and the fourth water seal pipe 201 is located in the first-layer water seal 107 as a partition of the first-layer water seal 107. At this time, the horizontal exhaust port 106 is not communicated with the first water seal pipe 101. At the same time, the water seal cover barrel 3 moves upward until the water seal cover barrel 3 is separated from the third-layer water seal 206, and the gas is discharged from the top opening of the fourth water seal pipe 201.

[0039] During specific implementation, the two-way water seal device further includes a lifting assembly. The lifting assembly includes an annular mounting plate 4 located in the upper axial distance part and sleeved on the outer circumferential surface of the fourth water seal pipe 201, two rotating assemblies respectively located on the upper left and right sides of the annular mounting plate 4, an external hoist 5, and two fixed pulleys 6. Each rotating assembly includes a rotating rod 8, a support frame 9 for supporting the rotating rod 8, and a linear driver 10. The support frame 9 is located radially inside the linear driver 10 and the support frame 9 is vertically fixed on the annular mounting plate 4. The middle part of the rotating rod 8 is hinged to the top end of the support frame 9 and the hinge axis is in the front-back direction. An avoidance opening 11 for avoiding the rotation of the rotating rod 8 is formed on the support frame 9. One end of the rotating rod 8 is provided with a bent part 12, and the other end of the rotating rod 8 is provided with a chute part 13. When the rotating rod 8 rotates to the horizontal direction, the chute part 13 is arranged obliquely upward. The fixed end of the linear driver 10 is hinged to the annular mounting plate 4, and the end of the telescopic end of the linear driver 10 is hinged with a slider 14 adapted to the chute part through a connecting rod 15. The included angle between the connecting rod 15 and the telescopic end of the linear driver 10 is an acute angle. Clamping parts 16 adapted to the bent parts 12 are provided at both left and right ends of the water seal cover barrel 3. A steel wire rope 7 is fixed between the hoist 5 and the water seal cover barrel 3. One of the fixed pulleys 6 is located directly above the hoist 5, and the other fixed pulley 6 is located directly above the water seal cover barrel 3 and the two fixed pulleys 6 are at the same height. When the rotating rod 8 is in the vertical state, the diameter of the water seal cover barrel 3 is smaller than the distance between the two opposite surfaces of the two bent parts. When the rotating rod 8 rotates from the vertical state to the horizontal state, the two bent parts 12 just clamp the clamping parts 16 of the water seal cover barrel 3, so that when the water seal cover barrel 3 moves upward, the water seal cover barrel 3 drives the second water seal assembly 2 to move upward.

[0040] During operation, when the gas needs to be discharged horizontally, the water seal cover barrel 3 is located in the third water seal 206, and the linear drive 10 is driven to be in the extended state, so that the water seal cover barrel 3 is stuck with the bent part of the rotating part, and the winch 5 is driven to make the water seal cover barrel 3 drive the second water seal assembly 2 to move up until the bottom opening of the fourth water seal pipe 201 is located above the horizontal exhaust port 106 and the fifth water seal pipe 202 is located in the second water seal 108 as a partition of the second water seal 108, and the gas is discharged from the horizontal exhaust port 106; when the gas needs to be discharged vertically, the winch 5 is driven to make the water seal cover The barrel 3 and the second water seal assembly 2 move downward until the second water seal assembly 2 moves downward so that the fifth water seal tube 202 is located in the second water seal 108 as a partition of the second water seal 108, and the fourth water seal tube 201 is located in the first water seal 107 as a partition of the first water seal 107, and the linear drive 10 is driven to a contracted state, so that the water seal cover barrel 3 is disengaged from the bent portion of the rotating part until the rotating rod 8 is in a vertical state, and the winch 5 is driven again to move the water seal cover barrel 3 upward until the water seal cover barrel 3 is disengaged from the third water seal 206, and the gas is discharged from the top opening of the fourth water seal tube 201.

[0041] In this specific embodiment, the bending portion 12 of the rotating rod 8 is L-shaped, and the clamp 16 of the water seal cover barrel 3 is 7-shaped. When the rotating rod 8 rotates from a vertical state to a horizontal state, the top surface of the clamp 16 of the water seal cover barrel 3 abuts against the bottom surface of the rotating rod 8, and the top surface of the water seal cover barrel 3 abuts against the bottom surface of the bending portion 12, and the structure is concretized, standardized, and stabilized. When in use, when the winch 5 drives the water seal cover barrel 3 to move upward, the water seal cover barrel 3 supports the rotating rod 8 and drives the rotating rod 8 to move upward, thereby driving the second water seal assembly 2 to move upward, so that the bottom end opening of the fourth water seal pipe 201 is located above the horizontal exhaust port 106 and the fifth water seal pipe 202 is located in the second layer of water seal 108 as a partition of the second layer of water seal 108, and the gas is discharged from the horizontal exhaust port 106.

[0042] It is well known to those skilled in the art that, due to the different sizes of the chute portion, the rotating rod 8 may still rotate slightly during the upward movement of the second water seal assembly 2. However, when it rotates to a certain position, such as Figure 11 As shown, the hinge point A between the rotating rod 8 and the support frame 9, the hinge point B between the slider 14 and the connecting rod 15, and the hinge point C between the linear drive 10 and the annular mounting plate 4 form a stable triangle. At this time, the rotating rod 8 cannot rotate, and the second water seal assembly 2 can be smoothly driven to move upward through the water seal cover barrel 3.

[0043] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A two-way water seal device, characterized in that, It includes a first water seal assembly (1), a second water seal assembly (2), and a water seal cover barrel (3); The first water seal assembly (1) includes a first water seal pipe (101), a second water seal pipe (102), and a third water seal pipe (103) that are coaxially and vertically arranged in a nested manner from the inside out. The bottom opening edge of the second water seal pipe (102) is sealed and fixed to the lower part of the outer circumferential surface of the first water seal pipe (101) through a first lower annular sealing plate (104). When in use, a first layer of water seal (107) is formed between the first water seal pipe (101) and the second water seal pipe (102). The bottom opening edge of the third water seal pipe (103) is sealed and fixedly connected to the middle part of the outer circumferential surface of the second water seal pipe (102) through a first upper annular sealing plate (105). When in use, a second layer of water seal (108) is formed between the second water seal pipe (102) and the third water seal pipe (103). There is a lower axial distance between the bottom of the first upper annular sealing plate (105) and the top opening of the first water seal pipe (101). A horizontal exhaust port (106) is provided in the part of the second water seal pipe (102) located at the lower axial distance; The second water seal assembly (2) includes a fourth water seal pipe (201), a fifth water seal pipe (202), and a sixth water seal pipe (203) that are coaxially and vertically arranged. The fifth water seal pipe (202) is sleeved on the middle part of the fourth water seal pipe (201), and the top opening edge of the fifth water seal pipe (202) is sealed and fixed to the middle part of the outer circumferential surface of the fourth water seal pipe (201) through a second lower annular sealing plate (204). The sixth water seal pipe (203) is sleeved on the upper part of the fourth water seal pipe (201), and the bottom opening edge of the sixth water seal pipe (203) is sealed and fixedly connected to the upper part of the outer circumferential surface of the fourth water seal pipe (201) through a second upper annular sealing plate (205). When in use, a third layer of water seal (206) is formed between the sixth water seal pipe (203) and the fourth water seal pipe (201). There is an upper axial distance between the sixth water seal pipe (203) and the fifth water seal pipe (202); When the second water seal assembly (2) is coaxially and vertically inserted into the first water seal assembly (1), the radial position of the fourth water seal pipe (201) is between the first water seal pipe (101) and the second water seal pipe (102), the radial position of the fifth water seal pipe (202) is between the second water seal pipe (102) and the third water seal pipe (103). The open end of the water seal cover barrel (3) is arranged downward and its radial position is between the fourth water seal pipe (201) and the sixth water seal pipe (203). When the bottom opening of the fourth water seal pipe (201) is above the horizontal exhaust port (106), the fifth water seal pipe (202) is located in the second layer of water seal (108) as a partition of the second layer of water seal (108). When the fourth water seal pipe (201) is located in the first layer of water seal (107) as a partition of the first layer of water seal (107), the fifth water seal pipe (202) is located in the second layer of water seal (108) as a partition of the second layer of water seal (108).

2. The two-way water seal device according to claim 1, characterized in that, It further includes a lifting assembly. The lifting assembly includes an annular mounting plate (4) sleeved on the outer circumferential surface of the fourth water seal pipe (201) and located in the upper axial distance part, two rotating assemblies respectively located on the left and right sides above the annular mounting plate (4), an external winch (5), and two fixed pulleys (6). Each rotating assembly includes a rotating rod (8), a support frame (9) for supporting the rotating rod (8), and a linear actuator (10). The support frame (9) is located radially inside the linear actuator (10) and is vertically fixed on the annular mounting plate (4). The middle part of the rotating rod (8) is hinged to the top end of the support frame (9), and the hinge axis is in the front-back direction. An avoidance opening (11) for avoiding the rotation of the rotating rod (8) is formed on the support frame (9). One end of the rotating rod (8) is provided with a bending part (12), and the other end of the rotating rod (8) is provided with a chute part (13). When the rotating rod (8) rotates to the horizontal direction, the chute part (13) is arranged obliquely upward. The fixed end of the linear actuator (10) is hinged on the annular mounting plate (4), and a slider (14) adapted to the chute part is hinged to the end of the telescopic end of the linear actuator (10) through a connecting rod (15). The included angle between the connecting rod (15) and the telescopic end of the linear actuator (10) is an acute angle. Clamping members (16) adapted to the bending parts (12) are provided at both the left and right ends of the water seal cover barrel (3). A steel wire rope (7) is fixed between the winch (5) and the water seal cover barrel (3). One of the fixed pulleys (6) is located directly above the winch (5), and the other fixed pulley (6) is located directly above the water seal cover barrel (3), and the two fixed pulleys (6) are at the same height. When the rotating rod (8) is in the vertical state, the diameter of the water seal cover barrel (3) is smaller than the distance between the two opposite surfaces of the two bending parts (12). When the rotating rod (8) rotates from the vertical state to the horizontal state, the two bending parts (12) are exactly clamped on the clamping members (16) of the water seal cover barrel (3), so that when the water seal cover barrel (3) moves upward, the water seal cover barrel (3) drives the second water seal assembly (2) to move upward.

3. The two-way water seal device according to claim 2, characterized in that, The bending part (12) of the rotating rod (8) is L-shaped, and the clamping member (16) of the water seal cover barrel (3) is 7-shaped.

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