One-way breather valve

Abstract

The utility model relates to the technical field of storage tank VOC (Volatile Organic Compound) recovery equipment, and discloses a one-way breather valve, a storage tank is internally provided with a storage space, and the storage space is internally provided with VOC gas; comprising a one-way respirator communicated with the storage tank, an air channel is formed in the one-way respirator, an outer air port is formed in the outer end of the air channel and communicated with the atmosphere, and an inner air port is formed in the inner end of the air channel and communicated with the storage space. A one-way valve for communicating or closing the air passage is arranged in the air passage; when the VOC gas in the storage tank is extracted, the air pressure of the material storage space in the storage tank is also extracted, and the storage tank supplements the external atmosphere into the material storage space through the air passage in the one-way respirator, so that the VOC gas in the material storage space can be thoroughly extracted; after the VOC gas is sucked, when the air pressure in the material storage space is larger than the atmospheric pressure, the one-way respirator seals the air channel through the one-way valve, and subsequently generated VOC gas leakage is prevented; the problem that suction is not thorough in the VOC matter suction process of the storage tank is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of storage tank VOC recovery equipment, in particular to a one-way breathing valve. Background Art

[0002] With the development of economy and society, the progress of technology, and the improvement of people's living standards, the regulations on air pollution are becoming more and more stringent, and the treatment of VOCs generated in industrial production processes is becoming more and more complicated and demanding; because in the chemical production process, there are many process tanks, the tank medium is not flammable, but the medium contains trace amounts of VOC substances, these VOC substances will overflow the tank medium and become gas gathered on the top of the tank; because there is air in the process tank space, these VOC gases gathered on the top of the tank are mixed with the air in the tank space, which has the possibility of flash explosion. If it is not handled, it will enter the next step of the production process, affecting the next production process or causing the possibility of explosion.

[0003] These accumulated VOC gases need to be collected in a closed manner and treated uniformly. Generally, a top fan is added to suck away the top-filling gas containing VOC substances and send it into a centralized treatment unit for adsorption, removal or incineration.

[0004] Generally, these storage tanks are closed tanks. By adding a fan, when the pressure in the closed tank is higher than the atmospheric pressure, the stored gas can be pumped out. However, when the amount of gas pumped out is too much, the pressure in the closed tank will become lower than the atmospheric pressure. At this time, it is difficult to pump out the gas, and it is even more difficult to pump out the accumulated VOC substances. Utility Model Content

[0005] The utility model aims to provide a one-way breathing valve, aiming to solve the problem of incomplete suction of VOC substances in a storage tank in the prior art.

[0006] The utility model is implemented as follows: a one-way breathing valve, a storage tank having a storage space, the storage space having VOC gas; a one-way respirator connected to the storage tank, the one-way respirator having an airway, the outer end of the airway forming an external air port, the external air port being connected to the atmosphere, the inner end of the airway forming an internal air port, the internal air port being connected to the storage space; a one-way valve for connecting or closing the airway is arranged in the airway;

[0007] When the air pressure in the storage space is greater than the atmospheric pressure, the one-way respirator closes the airway through the one-way valve; when the atmospheric pressure is greater than the air pressure in the storage space, and the difference between the atmospheric pressure and the air pressure in the storage space exceeds the set pressure value, the one-way valve opens and the airway is connected.

[0008] Furthermore, the one-way valve includes a swing door for connecting or closing the airway, and the swing door is connected to the inner wall of the airway by a hinge.

[0009] Furthermore, a protrusion for sealing connection is convexly provided on the swing door.

[0010] Furthermore, an extrusion-deformed sealing ring is provided on the periphery of the raised portion, and the sealing ring is arranged around the periphery of the raised portion. When the swing door is blocked in the airway, the outer wall of the sealing ring presses against the circumferential inner wall of the airway, and the inner wall of the sealing ring presses against the outer periphery of the raised portion.

[0011] Furthermore, a flange connected to the storage tank is provided at the bottom of the one-way respirator, and a sealing gasket is provided on the flange.

[0012] Furthermore, the one-way respirator includes a longitudinally arranged inlet pipe section, the inner air port is located at the bottom of the inlet pipe section, the top of the inlet pipe section has a closing pipe section that is bent away from the inlet pipe section and extends horizontally, the one-way valve is installed in the closing pipe section, and the closing pipe section is connected to the external air port.

[0013] Furthermore, the inner end of the closing pipe section is connected to the introduction pipe section, the outer end of the closing pipe section has an entry pipe section that bends downward and extends horizontally, the inner end of the entry pipe section is connected to the closing pipe section, and the external air port is located on the outer end of the entry pipe section.

[0014] Furthermore, a protective shell is provided on the upper part of the introduction pipe segment, and the protective shell is arranged circumferentially around the upper part of the introduction pipe segment, and the protective shell is arranged circumferentially around the outer periphery of the closing pipe segment and the entry pipe segment.

[0015] Furthermore, the one-way respirator is provided with a filter screen, and the filter screen covers the external air port.

[0016] Furthermore, the one-way respirator is provided with a rain cover, and the rain cover is located above the external air outlet.

[0017] Compared with the prior art, the one-way breathing valve provided by the utility model can extract the air pressure of the storage space in the storage tank during the extraction of the VOC gas in the storage tank, and the storage tank replenishes the external atmosphere into the storage space through the airway in the one-way breathing device, so that the VOC gas in the storage space can be completely sucked out; after the extraction of the VOC gas is completed, when the air pressure in the storage space is greater than the atmospheric pressure, the one-way breathing device uses the one-way valve to close the airway to prevent the leakage of the VOC gas generated subsequently; the problem of incomplete extraction during the extraction of VOC substances by the storage tank is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the one-way breathing valve provided by the utility model;

[0019] Figure 2 It is a structural schematic diagram of the one-way respirator provided by the utility model.

[0020] In the figure: a storage tank 10, a one-way respirator 20, a one-way valve 30, a filter screen 40, a rain cover 50, a storage space 11, an airway 21, a flange 22, an inlet pipe section 23, a closing pipe section 24, an entry pipe section 25, a protective shell 26, a sealing gasket 27, a swing door 31, a hinge 32, a protrusion 33, and a sealing ring 34. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0023] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Reference Figure 1-2 As shown, it is a preferred embodiment provided by the utility model.

[0025] A one-way breathing valve, wherein the storage tank 10 has a storage space 11, and the storage space 11 has VOC gas; the one-way respirator 20 is connected to the storage tank 10, and the one-way respirator 20 has an airway 21, the outer end of the airway 21 forms an external air port, and the external air port is connected to the atmosphere, and the inner end of the airway 21 forms an internal air port, and the internal air port is connected to the storage space 11; the airway 21 is provided with a one-way valve 30 for connecting or closing the airway 21;

[0026] When the air pressure in the storage space 11 is greater than the atmospheric pressure, the one-way respirator 20 closes the airway 21 through the one-way valve 30; when the atmospheric pressure is greater than the air pressure in the storage space 11, and the difference between the atmospheric pressure and the air pressure in the storage space 11 exceeds the set pressure value, the one-way valve 30 opens and the airway 21 is connected.

[0027] With the one-way breathing valve provided above, during the process of VOC gas in the storage tank 10 being extracted, the air pressure of the storage space 11 in the storage tank 10 will also be extracted, and the storage tank 10 replenishes the external atmosphere into the storage space 11 through the airway 21 in the one-way respirator 20, so that the VOC gas in the storage space 11 can be completely sucked out; after the suction of the VOC gas is completed, when the air pressure in the storage space 11 is greater than the atmospheric pressure, the one-way respirator 20 uses the one-way valve 30 to close the airway 21 to prevent the subsequent VOC gas from leaking; the problem of incomplete suction during the process of suctioning VOC substances by the storage tank 10 is solved.

[0028] The one-way respirator 20 is installed around the top cover of the storage tank 10. Four or eight can be installed, depending on the size of the storage tank 10. When the fan of the storage tank 10 is running to extract the VOC gas accumulated in the storage tank 10, the gas pressure in the storage tank 10 will become smaller, and a pressure difference will be generated with the atmospheric pressure. When this pressure difference is greater than the weight of the one-way valve 30, the one-way valve 30 will be opened by the atmospheric pressure, and air will enter the storage space 11 along the airway 21, carrying the VOC gas accumulated in the storage tank 10. The gas is drawn away and enters the next-level processing unit. When the exhaust fan stops running, the pressure in the storage tank 10 will increase. When the pressure difference with the atmospheric pressure cannot lift the one-way valve 30, the one-way valve 30 will fall, isolating the connection between the accumulated gas in the storage tank 10 and the atmosphere, so that the storage tank 10 is always in a safe and environmentally friendly state; when the pressure in the storage tank 10 becomes higher, the one-way valve 30 is subjected to reverse pressure, so that the accumulated gas in the storage tank 10 is completely isolated from the atmosphere, and the greater the pressure in the storage tank 10, the better the sealing effect.

[0029] In this embodiment, the one-way valve 30 includes a swing door 31 for connecting or closing the air passage 21, and the swing door 31 is connected to the inner wall of the air passage 21 through a hinge 32. In this way, the swinging movement of the swing door 31 is facilitated to realize the swinging door 31 connecting or closing the air passage 21.

[0030] In this embodiment, a protrusion 33 for sealing connection is convexly provided on the swing door 31. In this way, the swing door 31 can seal the airway 21 through the protrusion 33.

[0031] In this embodiment, a sealing ring 34 that is squeezed and deformed is provided on the outer periphery of the protrusion 33. The sealing ring 34 is arranged around the outer periphery of the protrusion 33. When the swing door 31 is blocked in the air passage 21, the outer side wall of the sealing ring 34 presses against the circumferential inner side wall of the air passage 21, and the inner side wall of the sealing ring 34 presses against the outer periphery of the protrusion 33. In this way, the protrusion 33 can further increase the sealing performance of the swing door 31 closing the air passage 21 through the sealing ring 34.

[0032] In this embodiment, a flange 22 connected to the storage tank 10 is provided at the bottom of the one-way respirator 20, and a sealing gasket 27 is provided on the flange 22. In this way, the one-way respirator 20 is connected to the storage tank 10 through the flange 22, and the sealing gasket 27 is used to prevent the VOC gas from leaking out of the connection between the one-way respirator 20 and the storage tank 10.

[0033] In this embodiment, the one-way respirator 20 includes a longitudinally arranged inlet pipe section 23, the inner air port is located at the bottom of the inlet pipe section 23, the top of the inlet pipe section 23 has a closing pipe section 24 that is bent away from the inlet pipe section 23 and extends horizontally, the one-way valve 30 is installed in the closing pipe section 24, and the closing pipe section 24 is connected to the external air port.

[0034] The one-way respirator 20 can introduce the atmosphere into the airway 21 through the closing pipe section 24. The closing pipe section 24 can be isolated from the external air port by the one-way valve 30, and the atmosphere can be transitionally introduced into the storage tank 10 through the introduction pipe section 23.

[0035] The inner end of the closing pipe section 24 is connected to the introduction pipe section 23, and the outer end of the closing pipe section 24 has an entry pipe section 25 that is bent downward and extends horizontally. The inner end of the entry pipe section 25 is connected to the closing pipe section 24, and the external air port is located on the outer end of the entry pipe section 25.

[0036] In this embodiment, a protective shell 26 is provided on the upper part of the introduction pipe section 23, and the protective shell 26 is arranged circumferentially around the upper part of the introduction pipe section 23, and the protective shell 26 is arranged circumferentially around the outer circumference of the closing pipe section 24 and the entry pipe section 25. In this way, the protective shell 26 can protect the entry pipe section 25, the closing pipe section 24 and the introduction pipe section 23.

[0037] In this embodiment, a filter screen plate 40 is provided on the one-way respirator 20, and the filter screen plate 40 covers the external air port. In this way, foreign matter in the air can be prevented from entering the airway 21 in the one-way respirator 20.

[0038] In this embodiment, a rain cover 50 is provided on the one-way respirator 20, and the rain cover 50 is located above the external air port. In this way, rainwater can be prevented from entering the airway 21 in the one-way respirator 20.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. One-way breathing valve, the storage tank has a storage space, and the storage space contains VOC gas; characterized in that: A one-way respirator connected to a storage tank is provided in the one-way respirator, wherein an airway is provided, wherein an outer end of the airway forms an outer air port, wherein the outer air port is connected to the atmosphere, and an inner end of the airway forms an inner air port, wherein the inner air port is connected to a material storage space; and a one-way valve is provided in the airway to connect or close the airway; When the air pressure in the storage space is greater than the atmospheric pressure, the one-way respirator closes the airway through the one-way valve; when the atmospheric pressure is greater than the air pressure in the storage space, and the difference between the atmospheric pressure and the air pressure in the storage space exceeds the set pressure value, the one-way valve opens and the airway is connected.

2. The one-way breathing valve according to claim 1, characterized in that: The one-way valve comprises a swing door for connecting or closing the airway, and the swing door is connected to the inner wall of the airway through a hinge.

3. The one-way breathing valve according to claim 2, characterized in that: The swing door is provided with a raised portion for sealing connection.

4. The one-way breathing valve according to claim 3, characterized in that: The outer periphery of the raised portion is provided with an extruded and deformed sealing ring, which is arranged around the outer periphery of the raised portion. When the swing door is blocked in the airway, the outer wall of the sealing ring presses against the circumferential inner wall of the airway, and the inner wall of the sealing ring presses against the outer periphery of the raised portion.

5. The one-way breathing valve according to any one of claims 1 to 4, characterized in that: A flange connected to the storage tank is arranged at the bottom of the one-way respirator, and a sealing gasket is arranged on the flange.

6. The one-way breathing valve according to any one of claims 1 to 4, characterized in that: The one-way respirator comprises a longitudinally arranged inlet pipe section, the inner air port is located at the bottom of the inlet pipe section, the top of the inlet pipe section has a closing pipe section that is bent away from the inlet pipe section and extends horizontally, the one-way valve is installed in the closing pipe section, and the closing pipe section is connected to the outer air port.

7. The one-way breathing valve according to claim 6, characterized in that: The inner end of the closing pipe section is connected to the introduction pipe section, the outer end of the closing pipe section has an entry pipe section that is bent downward and extends horizontally, the inner end of the entry pipe section is connected to the closing pipe section, and the external air port is located on the outer end of the entry pipe section.

8. The one-way breathing valve according to claim 7, characterized in that: A protective shell is arranged on the upper part of the introduction pipe section, and the protective shell is arranged circumferentially along the upper part of the introduction pipe section, and the protective shell is arranged circumferentially along the outer periphery of the closing pipe section and the entry pipe section.

9. The one-way breathing valve according to any one of claims 1 to 4, characterized in that: The one-way respirator is provided with a filter screen plate, and the filter screen plate covers the external air port.

10. The one-way breathing valve according to claim 9, characterized in that: The one-way respirator is provided with a rain cover, and the rain cover is located above the external air outlet.

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