A sealing structure for a breather valve

Abstract

The utility model discloses a breathing valve sealing technical field's a kind of sealing structure for breathing valve, including storage tank, and there is suction valve and exhaust valve on storage tank, and suction valve is connected with liquid seal device, and liquid seal device includes connecting pipe, liquid seal tank and suction pipe, and connecting pipe one end is communicated with suction valve, and other end is communicated with liquid seal tank, and suction pipe is installed in liquid seal tank, and suction pipe free end is equipped with sealing device;Sealing device includes sealing plate and fixed lid, and sealing plate is used to block suction pipe free end, and fixed to suction pipe by fixed lid, and still be equipped with oiling device and several exhaust device on sealing plate;When positive pressure appears in storage tank, and storage tank can be discharged via exhaust valve, but still part of storage tank gas is mixed with aldehyde, alcohol medium and flows out via suction valve, at this moment, liquid seal device can absorb the gas mixed with aldehyde, alcohol medium, so as not to make the gas mixed with aldehyde, alcohol medium volatilize to outside, cause on-site environment smell big.

Description

Technical Field

[0001] This utility model relates to the field of breather valve sealing technology, specifically a sealing structure for a breather valve. Background Technology

[0002] During normal operation of the atmospheric pressure storage tank, an N2 channel is introduced through the top of the tank, with a set pressure of 1-1.3 kPa to ensure a slight positive pressure inside the tank. The working range of the breather valve is +200 mmH2O to -50 mmH2O. When the working pressure inside the tank exceeds +200 mmH2O, the exhalation valve of the breather valve starts working, venting the gas inside the tank to the waste gas collector, ensuring that the pressure inside the tank does not exceed the limit and damage the equipment. When the working pressure inside the tank is below -50 mmH2O, the inhalation valve of the breather valve starts working, drawing air from the atmosphere into the tank, ensuring that the tank does not collapse due to negative pressure. To ensure equipment safety when the tank is under negative pressure, the inhalation valve of the breather valve has a light counterweight, ranging from 0.5 to 1 kg. The mating material of the sealing surface is designed as PTFE to stainless steel, and the seal is a knife-type seal. The sealing principle relies on the counterweight pressing on the guide valve to achieve the sealing effect. While this type of seal ensures safety under negative pressure, the pressure range under positive pressure is larger than that under negative pressure. This causes gas inside the tank to leak out from the lighter-weight air intake. Combined with the volatility of aldehydes and alcohols, this results in a strong odor in the on-site environment.

[0003] Chinese Patent Publication No. CN205315790U discloses a "Sealing Structure for a Breathing Valve," which includes an intake valve and a liquid sealing device connected to the port of the intake valve. The liquid sealing device includes a liquid sealing tank, an oil filling port, and an exhaust port. A gas inlet on one side of the liquid sealing tank is connected to the intake valve, and an oil filling port and an exhaust port are located on the other side of the liquid sealing tank. The liquid sealing tank is internally divided into an oil storage chamber and an intake chamber, with the lower parts of the two chambers connected. This device allows the sealing liquid in the liquid storage tank of the liquid sealing device to seal off any leaked gaseous medium, while simultaneously preventing the sealing liquid in the liquid sealing device from contaminating the medium stored in the tank. The use of the liquid sealing device reduces pollution at the source, improves resource utilization efficiency, and reduces or avoids the generation and emission of pollutants during production and use, thereby mitigating or eliminating harm to employee health and the environment.

[0004] However, the aforementioned existing technology does not provide specific descriptions of the cap, filling port, and venting device. The installation method of the cap, the form of the filling port and venting device are not described in detail. The filling port needs to adopt a certain sealing method. In order to increase practicality, convenience also needs to be taken into account.

[0005] Based on this, the present invention designs a sealing structure for a breathing valve to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a sealing structure for a breather valve, in order to solve the problems mentioned above. Currently, there is no specific description of the cap, filling port and exhaust device. The installation method of the cap, the form of the filling port and exhaust device are not described in detail. The filling port needs to adopt a certain sealing method. In order to increase practicality, convenience also needs to be taken into account.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A sealing structure for a breathing valve includes a storage tank, on which an inhalation valve and an exhaust valve are installed. The inhalation valve is connected to a liquid sealing device, which includes a connecting pipe, a liquid sealing tank, and an inhalation pipe. One end of the connecting pipe is connected to the inhalation valve, and the other end is connected to the liquid sealing tank. The inhalation pipe is installed inside the liquid sealing tank, and a sealing device is installed at the free end of the inhalation pipe.

[0009] The sealing device includes a sealing plate and a fixing cover. The sealing plate is used to block the free end of the air intake pipe and is fixed to the air intake pipe by the fixing cover. The sealing plate is also provided with an oiling device and several exhaust devices.

[0010] As a further embodiment of this utility model: the liquid-sealed tank has an oil storage chamber, which contains a sealing liquid made of white oil and is connected to the suction valve through the connecting pipe. The suction pipe has a suction chamber and is inserted into the sealing liquid. The oil storage chamber is isolated from the suction chamber through the sealing liquid. The sealing plate has several sets of exhaust ports, lifting chambers, and exhaust channels corresponding to the exhaust device. The lifting chamber is located above the exhaust port and is connected to the suction chamber through the exhaust port. The exhaust channel is connected to the lifting chamber. The sealing plate has a refueling channel that is connected to the refueling device.

[0011] As a further embodiment of this utility model: the exhaust device includes a lifting plate, a first sealing gasket, a connecting rod, an arc-shaped plate, a lifting rod, and a first spring, wherein: the lifting plate is slidably connected within the lifting cavity and is used to drive the first sealing gasket; the first sealing gasket is fixedly installed on the bottom surface of the lifting plate and is used to seal the exhaust port to isolate the exhaust port from the exhaust channel; one end of the connecting rod is fixedly installed on the lifting plate, and the other end is fixedly connected to the arc-shaped plate; the lifting rod is fixedly installed on the end of the lifting plate away from the connecting rod and is slidably connected within the sealing plate; the first spring is sleeved outside the lifting rod and is located between the inner wall of the lifting cavity and the lifting plate.

[0012] As a further embodiment of this utility model: the exhaust device further includes an exhaust wall, an exhaust cover, and exhaust holes, wherein: the exhaust wall is fixedly installed on the sealing plate and located at the free end of the exhaust channel; the exhaust cover is installed on the top of the exhaust wall and is used for rain protection; a plurality of exhaust holes are provided and opened on the exhaust wall, and the two ends of the exhaust holes are respectively connected to the exhaust channel and the outside.

[0013] As a further embodiment of this utility model: the refueling device includes a refueling shell, a refueling port, a telescopic cavity, a refueling hole, a telescopic plate, and a second sealing gasket, wherein: the refueling shell is fixedly installed on the sealing plate and located at the free end of the refueling channel; the refueling port, the telescopic cavity, and the refueling hole are formed on the refueling shell, the telescopic cavity is located above the refueling port and communicates with the refueling channel through the refueling port, and the refueling hole communicates with the telescopic cavity; the telescopic plate is slidably connected in the telescopic cavity and is used to drive the second sealing gasket; the second sealing gasket is fixedly installed below the telescopic plate and is used to seal the refueling port to isolate the refueling port and the refueling hole.

[0014] As a further embodiment of this utility model: the refueling device further includes a pull rod, a second spring, and a handle, wherein: the pull rod is inserted into the refueling housing, and one end is fixedly connected to the telescopic plate, and the other end is fixedly connected to the handle, and the handle drives the telescopic plate through the pull rod; the second spring is sleeved on the pull rod and is located between the inner wall of the telescopic cavity and the telescopic plate.

[0015] As a further embodiment of this utility model: the top end of the suction pipe is provided with an installation groove, the installation groove is matched with the sealing plate and is used to accommodate the sealing plate, the outer side of the suction pipe is provided with an external thread, the inner wall of the fixing cover is provided with an internal thread that matches the external thread, and the fixing cover is threadedly connected to the suction pipe; the fixing cover is provided with a flange, and the flange is provided with a sealing ring for sealing the gap between the sealing plate and the suction pipe.

[0016] As a further embodiment of this utility model: the liquid sealing tank is provided with an observation device for observing the height of the sealing liquid, and the bottom of the liquid sealing tank is provided with a discharge plug for discharging the sealing liquid.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this invention, the suction valve is connected to the liquid sealing device. When a negative pressure occurs in the storage tank, outside air enters the storage tank through the suction valve after passing through the liquid sealing device, ensuring that the storage tank is not sucked out due to the negative pressure. When a positive pressure occurs in the storage tank, the gas inside the storage tank will be discharged through the exhaust valve. However, some gas in the storage tank, mixed with aldehydes and alcohols, will still flow out through the suction valve. At this time, the liquid sealing device can absorb the gas mixed with aldehydes and alcohols, preventing the gas mixed with aldehydes and alcohols from evaporating into the outside and causing a strong odor in the environment.

[0019] In this invention, some of the gas in the storage tank contains aldehydes and alcohols. After flowing out through the suction valve, the gas enters the oil storage chamber through the connecting pipe and is absorbed by the white oil in the oil storage chamber, preventing it from evaporating into the outside environment and causing a strong odor. The suction pipe is inserted into the sealing liquid, which isolates the oil storage chamber and the suction chamber, so that a certain pressure is formed in the oil storage chamber. This pressure can offset part of the positive pressure in the storage tank and reduce the leakage of gas from the storage tank.

[0020] In this invention, the sealing plate is used to block the free end of the suction pipe; the fixing cover is used to fix the sealing plate to the suction pipe; the oiling device is used to add sealing fluid to the oil storage chamber; and the exhaust device is used to allow the suction chamber to exchange gases with the outside space. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the liquid sealing device in this utility model;

[0023] Figure 3 This is a schematic diagram of the sealing device in this utility model;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0026] In the diagram: 1. Storage tank; 2. Suction valve; 3. Exhaust valve; 4. Liquid seal device; 41. Connecting pipe; 42. Liquid seal tank; 43. Suction pipe; 44. Observation device; 45. Drain plug; 46. Oil storage chamber; 47. Suction chamber; 48. Mounting groove; 5. Sealing device; 51. Sealing plate; 52. Fixing cover; 53. Sealing ring; 54. Exhaust port; 55. Lifting chamber; 56. Exhaust passage; 57. Refueling passage; 6. Exhaust device; 61. Lifting plate; 62. First sealing gasket; 63. Connecting rod; 64. Arc plate; 65. Lifting rod; 66. First spring; 67. Exhaust wall; 68. Exhaust cover; 69. Exhaust hole; 7. Refueling device; 71. Refueling shell; 72. Refueling port; 73. Telescopic chamber; 74. Refueling hole; 75. Telescopic plate; 76. Second sealing gasket; 77. Pull rod; 78. Second spring; 79. Handle. Detailed Implementation

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This embodiment;

[0029] A sealing structure for a breather valve, please refer to [link / reference]. Figures 1-5 It includes a storage tank 1, on which a suction valve 2 and an exhaust valve 3 are installed, and the suction valve 2 is connected to a liquid seal device 4.

[0030] Through the above technical solution, the suction valve 2 and the liquid sealing device 4 are connected in this utility model. When a negative pressure occurs in the storage tank 1, the outside air enters the storage tank 1 through the suction valve 2 after passing through the liquid sealing device 4, ensuring that the storage tank 1 is not sucked down due to the negative pressure. When a positive pressure occurs in the storage tank 1, the gas in the storage tank 1 will be discharged through the exhaust valve 3. However, some gas in the storage tank 1 mixed with aldehyde and alcohol media will still flow out through the suction valve 2. At this time, the liquid sealing device 4 can absorb the gas mixed with aldehyde and alcohol media, so that the gas mixed with aldehyde and alcohol media will not evaporate to the outside and cause a strong odor in the on-site environment.

[0031] In some examples, refer to Figure 1-5As shown, the liquid sealing device 4 includes a connecting pipe 41, a liquid sealing tank 42, and a suction pipe 43. One end of the connecting pipe 41 is connected to the suction valve 2, and the other end is connected to the liquid sealing tank 42. The suction pipe 43 is installed inside the liquid sealing tank 42. An oil storage chamber 46 is provided inside the liquid sealing tank 42. The oil storage chamber 46 contains a sealing liquid made of white oil and is connected to the suction valve 2 through the connecting pipe 41. A suction chamber 47 is provided inside the suction pipe 43 and is inserted into the sealing liquid. The oil storage chamber 46 is isolated from the suction chamber 47 by the sealing liquid.

[0032] Through the above technical solution, in this utility model, the gas in part of the storage tank 1, mixed with aldehydes and alcohols, flows out through the suction valve 2 and enters the oil storage chamber 46 through the connecting pipe 41. It is absorbed by the white oil in the oil storage chamber 46 and will not volatilize to the outside, causing a strong odor in the environment. The suction pipe 43 is inserted into the sealing liquid, which isolates the oil storage chamber 46 and the suction chamber 47, so that the oil storage chamber 46 forms a certain pressure. This pressure can offset part of the positive pressure in the storage tank 1 and reduce the overflow of gas in the storage tank 1.

[0033] In some examples, refer to Figure 1-5 As shown, the liquid seal tank 42 is equipped with an observation device 44, which is used to observe the height of the sealing liquid. The bottom of the liquid seal tank 42 is equipped with a drain plug 45, which is used to drain the sealing liquid.

[0034] Through the above technical solution, the change in the sealing fluid height in the oil storage chamber 46 can be observed by the observation device 44; the discharge plug 45 facilitates the discharge of sealing fluid that has been used multiple times for a long time.

[0035] In some examples, refer to Figure 1-5 As shown, a sealing device 5 is installed at the free end of the suction pipe 43. The sealing device 5 includes a sealing plate 51 and a fixing cover 52. The sealing plate 51 is used to block the free end of the suction pipe 43 and is fixed to the suction pipe 43 by the fixing cover 52. The sealing plate 51 is also provided with a lubrication device 7 and several exhaust devices 6.

[0036] Through the above technical solution, the sealing plate 51 in this utility model is used to block the free end of the suction pipe 43; the fixing cover 52 is used to fix the sealing plate 51 to the suction pipe 43; the oiling device 7 is used to add sealing liquid to the oil storage chamber 46; and the exhaust device 6 is used to enable the suction chamber 47 to exchange gases with the outside space.

[0037] Working process of storage tank 1:

[0038] When negative pressure occurs in storage tank 1, air in oil storage chamber 46 enters storage tank 1 through air intake valve 2, ensuring that storage tank 1 is not sucked out due to negative pressure.

[0039] When positive pressure occurs in storage tank 1, a portion of the gas mixed with aldehydes and alcohols in storage tank 1 is discharged through exhaust valve 3, and another portion of the gas mixed with aldehydes and alcohols in storage tank 1 flows out through intake valve 2 and is absorbed by the sealing liquid in oil storage chamber 46, so that the gas mixed with aldehydes and alcohols does not volatilize into the outside world and cause a strong odor in the site environment.

[0040] In some examples, refer to Figure 1-5 As shown, the top end of the suction pipe 43 is provided with an installation groove 48, which matches the sealing plate 51 and is used to accommodate the sealing plate 51. The outer side of the suction pipe 43 is provided with an external thread, and the inner wall of the fixing cover 52 is provided with an internal thread that matches the external thread. The fixing cover 52 is threadedly connected to the suction pipe 43. The fixing cover 52 is provided with a flange, and a sealing ring 53 is provided inside the flange to seal the gap between the sealing plate 51 and the suction pipe 43.

[0041] Through the above technical solution, the mounting groove 48 of this utility model matches the sealing plate 51, so that the sealing plate 51 can be perfectly installed at the top of the suction pipe 43; the fixing cover 52 is threadedly connected to the external thread of the suction pipe 43 through the internal thread, and the sealing plate 51 is fixed to the mounting groove 48 on the suction pipe 43 by the flange; the sealing ring 53 is installed between the flange and the sealing plate 51 and the suction pipe 43. When the fixing cover 52 is fixed to the suction pipe 43, the sealing ring 53 will change shape after being compressed, filling the gap between the sealing plate 51 and the suction pipe 43, and improving the airtightness.

[0042] Installation process of sealing device 5:

[0043] First, install the sealing plate 51 into the mounting groove 48. Then, connect the fixing cover 52 to the external thread of the suction pipe 43 through the internal thread. Fix the sealing plate 51 into the mounting groove 48 on the suction pipe 43 through the flange on the fixing cover 52.

[0044] In some examples, refer to Figure 1-5 As shown, the sealing plate 51 has several sets of exhaust ports 54, lifting chambers 55 and exhaust channels 56 corresponding to the exhaust device 6. The lifting chamber 55 is located above the exhaust port 54 and is connected to the intake chamber 47 through the exhaust port 54. The exhaust channel 56 is connected to the lifting chamber 55.

[0045] Through the above technical solution, in this utility model, the lifting chamber 55 is connected to the air intake chamber 47 through the exhaust port 54, and is connected to the outside air through the exhaust channel 56.

[0046] In some examples, refer to Figure 1-5As shown, the exhaust device 6 includes a lifting plate 61, a first sealing gasket 62, a connecting rod 63, an arc-shaped plate 64, a lifting rod 65, and a first spring 66. The lifting plate 61 is slidably connected within the lifting cavity 55 and is used to drive the first sealing gasket 62. The first sealing gasket 62 is fixedly installed on the bottom surface of the lifting plate 61 and is used to seal the exhaust port 54, thus isolating the exhaust port 54 from the exhaust channel 56. One end of the connecting rod 63 is fixedly installed on the lifting plate 61, and the other end is fixedly connected to the arc-shaped plate 64. The lifting rod 65 is fixedly installed on the end of the lifting plate 61 away from the connecting rod 63 and is slidably connected within the sealing plate 51. The first spring 66 is sleeved outside the lifting rod 65 and is located between the inner wall of the lifting cavity 55 and the lifting plate 61.

[0047] Through the above technical solution, under normal circumstances, the first spring 66 drives the first sealing gasket 62 to seal the exhaust port 54 through the lifting plate 61, thereby isolating the exhaust port 54 and the exhaust channel 56. When positive pressure occurs in the storage tank 1, the gas in the storage tank 1 flows out through the suction valve 2 and is absorbed by the sealing liquid in the oil storage chamber 46. During the absorption process, the sealing liquid is squeezed and enters the suction chamber 47 in the suction pipe 43. The sealing liquid squeezes the gas in the suction chamber 47, and the pressurized gas drives the connecting rod 63 through the arc plate 64. The connecting rod 63 drives the lifting plate 61 to move upward, and the lifting plate 61 drives the first sealing gasket 62 to release the blockage of the exhaust port 54, so that the exhaust port 54, the lifting chamber 55 and the exhaust channel 56 are connected, which facilitates the gas exchange between the suction chamber 47 and the outside space. The lifting rod 65 is set to maintain the stability of the lifting plate 61 during the sliding process.

[0048] In some examples, refer to Figure 1-5 As shown, the exhaust device 6 also includes an exhaust wall 67, an exhaust cover 68, and an exhaust hole 69, wherein: the exhaust wall 67 is fixedly installed on the sealing plate 51 and is located at the free end of the exhaust channel 56; the exhaust cover 68 is installed on the top of the exhaust wall 67 and is used for rain protection; a plurality of exhaust holes 69 are provided and opened on the exhaust wall 67, and the two ends of the exhaust holes 69 are respectively connected to the exhaust channel 56 and the outside.

[0049] Through the above technical solution, the exhaust channel 56 of this utility model is connected to the outside air through the inner cavity of the exhaust wall 67 and the exhaust hole 69, and the exhaust cover 68 is used to prevent rainwater or impurities from blocking the exhaust channel 56.

[0050] The exhaust process of exhaust device 6:

[0051] When positive pressure occurs in storage tank 1, the gas in storage tank 1 flows out through suction valve 2 and is absorbed by the sealing liquid in oil storage chamber 46. During the absorption process, the sealing liquid is squeezed and enters suction chamber 47 in suction pipe 43. The sealing liquid squeezes the gas in suction chamber 47. The pressurized gas drives connecting rod 63 through arc plate 64. Connecting rod 63 drives lifting plate 61 to move upward and compresses first spring 66 at the same time. Lifting plate 61 drives first sealing gasket 62 to release the blockage of exhaust port 54, so that exhaust port 54, lifting chamber 55 and exhaust channel 56 are connected. Exhaust channel 56 is connected to the outside air through the inner cavity of exhaust wall 67 and exhaust hole 69, so that suction chamber 47 can exchange gases with the outside space.

[0052] In some examples, refer to Figure 1-5 As shown, a refueling channel 57 is provided on the sealing plate 51, which is connected to the refueling device 7. The refueling device 7 includes a refueling housing 71, a refueling port 72, a telescopic cavity 73, a refueling hole 74, a telescopic plate 75, and a second sealing gasket 76. The refueling housing 71 is fixedly installed on the sealing plate 51 and is located at the free end of the refueling channel 57. The refueling port 72, the telescopic cavity 73, and the refueling hole 74 are provided on the refueling housing 71. The telescopic cavity 73 is located above the refueling port 72 and is connected to the refueling channel 57 through the refueling port 72. The refueling hole 74 is connected to the telescopic cavity 73. The telescopic plate 75 is slidably connected in the telescopic cavity 73 and is used to drive the second sealing gasket 76. The second sealing gasket 76 is fixedly installed below the telescopic plate 75 and is used to seal the refueling port 72 to isolate the refueling port 72 from the refueling hole 74.

[0053] Through the above technical solution, in this utility model, the telescopic plate 75 drives the second sealing gasket 76 to seal the oil filling port 72, thereby isolating the oil filling port 72 and the oil filling hole 74, so that the air intake chamber 47 is in a sealed state; the telescopic plate 75 drives the second sealing gasket 76 to release the seal on the oil filling port 72, so that the oil filling hole 74 is connected to the air intake chamber 47 through the telescopic chamber 73 and the oil filling port 72, which facilitates the addition of sealing fluid.

[0054] In some examples, refer to Figure 1-5 As shown, the refueling device 7 also includes a pull rod 77, a second spring 78, and a handle 79. The pull rod 77 is inserted into the refueling housing 71, and one end is fixedly connected to the telescopic plate 75, and the other end is fixedly connected to the handle 79. The handle 79 drives the telescopic plate 75 through the pull rod 77. The second spring 78 is sleeved on the pull rod 77 and is located between the inner wall of the telescopic cavity 73 and the telescopic plate 75.

[0055] Through the above technical solution, in this utility model, the second spring 78 drives the second sealing gasket 76 to seal the oil filling port 72 through the telescopic plate 75, thereby isolating the oil filling port 72 and the oil filling hole 74, so that the air intake chamber 47 is in a sealed state; the handle 79 drives the telescopic plate 75 to rise through the pull rod 77, and the telescopic plate 75 drives the second sealing gasket 76 to release the seal on the oil filling port 72, so that the oil filling hole 74 is connected to the air intake chamber 47 through the telescopic chamber 73 and the oil filling port 72, which facilitates the addition of sealing fluid.

[0056] The refueling process of refueling device 7:

[0057] Under normal circumstances, the second spring 78 drives the second sealing gasket 76 to seal the oil filler port 72 via the telescopic plate 75;

[0058] When sealant needs to be added, the handle 79 drives the lever 77 to rise, the lever 77 drives the telescopic plate 75 to rise along the telescopic cavity 73, the telescopic plate 75 drives the second sealing gasket 76 to release the seal on the filling port 72, so that the filling hole 74 is connected to the air intake cavity 47 through the telescopic cavity 73 and the filling port 72, which facilitates the addition of sealant.

[0059] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sealing structure for a breathing valve, comprising a storage tank (1), wherein an intake valve (2) and an exhaust valve (3) are installed on the storage tank (1), and the intake valve (2) is connected to a liquid sealing device (4), characterized in that: The liquid sealing device (4) includes a connecting pipe (41), a liquid sealing tank (42), and a suction pipe (43). One end of the connecting pipe (41) is connected to the suction valve (2), and the other end is connected to the liquid sealing tank (42). The suction pipe (43) is installed inside the liquid sealing tank (42), and a sealing device (5) is installed at the free end of the suction pipe (43). The sealing device (5) includes a sealing plate (51) and a fixing cover (52). The sealing plate (51) is used to block the free end of the suction pipe (43) and is fixed to the suction pipe (43) by the fixing cover (52). The sealing plate (51) is also provided with a filling device (7) and several exhaust devices (6).

2. The sealing structure for a breather valve according to claim 1, characterized in that: The liquid seal tank (42) has an oil storage chamber (46) inside, and the oil storage chamber (46) contains a sealing liquid made of white oil. It is connected to the suction valve (2) through the connecting pipe (41). The suction pipe (43) has a suction chamber (47) inside and is inserted into the sealing liquid. The oil storage chamber (46) is isolated from the suction chamber (47) through the sealing liquid. The sealing plate (51) is provided with a plurality of exhaust ports (54), lifting chambers (55) and exhaust channels (56) corresponding to the exhaust device (6). The lifting chamber (55) is located above the exhaust port (54) and is connected to the intake chamber (47) through the exhaust port (54). The exhaust channel (56) is connected to the lifting chamber (55). The sealing plate (51) has a refueling channel (57) which is connected to the refueling device (7).

3. The sealing structure for a breather valve according to claim 2, characterized in that: The exhaust device (6) includes a lifting plate (61), a first sealing gasket (62), a connecting rod (63), an arc-shaped plate (64), a lifting rod (65), and a first spring (66), wherein: The lifting plate (61) is slidably connected in the lifting cavity (55) and is used to drive the first sealing gasket (62); The first sealing gasket (62) is fixedly installed on the bottom surface of the lifting plate (61) and is used to seal the exhaust port (54) to isolate the exhaust port (54) from the exhaust channel (56); One end of the connecting rod (63) is fixedly installed on the lifting plate (61), and the other end is fixedly connected to the arc plate (64); The lifting rod (65) is fixedly installed at the end of the lifting plate (61) away from the connecting rod (63) and is slidably connected inside the sealing plate (51); The first spring (66) is sleeved outside the lifting rod (65) and located between the inner wall of the lifting cavity (55) and the lifting plate (61).

4. The sealing structure for a breather valve according to claim 3, characterized in that: The exhaust device (6) further includes an exhaust wall (67), an exhaust cover (68), and an exhaust port (69), wherein: The exhaust wall (67) is fixedly installed on the sealing plate (51) and located at the free end of the exhaust channel (56); The exhaust cover (68) is installed on the top of the exhaust wall (67) and is used for rain protection; The exhaust holes (69) are provided in a plurality of manner and are opened on the exhaust wall (67). The two ends of the exhaust holes (69) are respectively connected to the exhaust channel (56) and the outside.

5. A sealing structure for a breather valve according to claim 4, characterized in that: The refueling device (7) includes a refueling shell (71), a refueling port (72), a telescopic cavity (73), a refueling hole (74), a telescopic plate (75), and a second sealing gasket (76), wherein: The refueling shell (71) is fixedly installed on the sealing plate (51) and located at the free end of the refueling channel (57); The filling port (72), the telescopic cavity (73) and the filling hole (74) are formed on the filling shell (71). The telescopic cavity (73) is located above the filling port (72) and is connected to the filling channel (57) through the filling port (72). The filling hole (74) is connected to the telescopic cavity (73). The telescopic plate (75) is slidably connected in the telescopic cavity (73) and is used to drive the second sealing gasket (76); The second sealing gasket (76) is fixedly installed below the telescopic plate (75) and is used to seal the oil filling port (72) to separate the oil filling port (72) from the oil filling hole (74).

6. A sealing structure for a breather valve according to claim 5, characterized in that: The refueling device (7) further includes a pull rod (77), a second spring (78), and a handle (79), wherein: The pull rod (77) is inserted into the refueling housing (71), and one end is fixedly connected to the telescopic plate (75), and the other end is fixedly connected to the handle (79). The handle (79) drives the telescopic plate (75) through the pull rod (77). The second spring (78) is sleeved on the pull rod (77) and located between the inner wall of the telescopic cavity (73) and the telescopic plate (75).

7. A sealing structure for a breather valve according to claim 6, characterized in that: The top end of the suction pipe (43) is provided with an installation groove (48), the installation groove (48) matches the sealing plate (51) and is used to accommodate the sealing plate (51), the outer side of the suction pipe (43) is provided with an external thread, the inner wall of the fixing cover (52) is provided with an internal thread that matches the external thread, and the fixing cover (52) is threadedly connected to the suction pipe (43). The fixed cover (52) has a flange inside, and the flange has a sealing ring (53) for sealing the gap between the sealing plate (51) and the suction pipe (43).

8. A sealing structure for a breather valve according to claim 7, characterized in that: The liquid seal tank (42) is equipped with an observation device (44) for observing the height of the sealing liquid. The bottom of the liquid seal tank (42) is equipped with a drain plug (45) for draining the sealing liquid.

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