Automatic cleaning system for breather valve

Abstract

The utility model discloses a breather valve automatic cleaning system, and relates to the technical field of breather valves, and the breather valve automatic cleaning system comprises a storage tank, a steam conveying pipeline, a nitrogen conveying pipeline, a three-way solenoid valve, a decentralized control cabinet, a bleeder, a gas opening valve, a gas closing valve, a breather valve, a normally open root valve, a first connecting pipeline, a second connecting pipeline and a pressure detector; a decentralized control system is arranged in the decentralized control cabinet, the pressure detector is arranged at the top of the storage tank, the decentralized control system is connected with the pressure detector and the three-way electromagnetic valve, the two ends of the first connecting pipeline are connected with the storage tank and the breather valve respectively, the gas stop valve is arranged on the first connecting pipeline, and one end of the diffusing pipe is communicated with the first connecting pipeline; the three-way electromagnetic valve is arranged at the joint of the steam conveying pipeline, the nitrogen conveying pipeline and the second connecting pipeline, and the output end of the second connecting pipeline is connected to the breather valve. The cleaning efficiency of the breather valve can be effectively improved, meanwhile, the cleaning cost of the breather valve is reduced, and the operation risk of workers is also reduced.

Description

Technical Field

[0001] The present application relates to the technical field of breathing valves, and in particular to an automatic cleaning system for breathing valves. Background Art

[0002] At present, chemical companies install breathing valves on the top of atmospheric pressure storage tanks to balance the air pressure in the tanks, reduce medium volatilization, and meet safety and environmental protection requirements. In order to prevent the breathing valve from being blocked and causing the tank to be pressurized or absorb negative pressure and cause production safety accidents, the breathing valve usually needs to be manually removed and cleaned once a month, and once a week in winter.

[0003] However, this method of cleaning the breathing valve has the following problems: whether the breathing valve is blocked can only be discovered after it is removed, the cleaning efficiency of the breathing valve is low, the escape of toxic and harmful gases during the removal process can easily cause certain safety risks for the workers, and the personnel need to be equipped with corresponding labor protection equipment when removing the breathing valve, which wastes material resources, and the frequent pipeline opening operations increase the safety risks of special operations. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an automatic breathing valve cleaning system, which can effectively improve the cleaning efficiency of the breathing valve, while reducing the cleaning cost of the breathing valve and reducing the operating risks of the staff.

[0005] The present application provides a breathing valve automatic cleaning system, comprising: a storage tank, a steam delivery pipeline, a nitrogen delivery pipeline, a three-way solenoid valve, a decentralized control cabinet, a vent pipe, an air-open valve, an air-close valve, a breathing valve, a normally open root valve, a first connecting pipeline, a second connecting pipeline and a pressure detector;

[0006] The distributed control cabinet is provided with a distributed control system, the pressure detector is provided on the top of the storage tank, the distributed control system is respectively connected to the pressure detector and the three-way solenoid valve, the two ends of the first connecting pipe are respectively connected to the storage tank and the breathing valve, the air-off valve is provided on the first connecting pipe, and the air-off valve is provided close to the breathing valve, one end of the vent pipe is communicated with the first connecting pipe, the vent pipe is provided between the storage tank and the air-off valve, and the air-on valve is provided on the vent pipe;

[0007] The output end of the steam delivery pipeline and the output end of the nitrogen delivery pipeline are both connected to the input end of the second connecting pipeline. The three-way solenoid valve is arranged at the connection between the steam delivery pipeline, the nitrogen delivery pipeline and the second connecting pipeline. The output end of the second connecting pipeline is connected to the breathing valve.

[0008] According to the automatic cleaning system of the breathing valve of the embodiment of the present application, at least the following beneficial effects are achieved: the pressure detector is used to detect whether the pressure in the storage tank reaches the preset pressure threshold, and generates a pressure detection signal after reaching the preset threshold and outputs the pressure detection signal to the distributed control system; the distributed control system is used to control the steam delivery pipeline to be connected with the second connecting pipeline through the three-way solenoid valve according to the pressure detection signal, so that the steam can be delivered to the breathing valve through the steam delivery pipeline and the second connecting pipeline in turn and the breathing valve is purged for the first preset time, at this time, the gas closing valve is closed, and the gas in the storage tank drives the gas opening valve to open and can be discharged from the venting pipeline to avoid abnormal pressure release of the storage tank; after the breathing valve is purged with steam to the first preset time, it is discharged from the common exhaust port of the breathing valve, and the distributed control system controls the nitrogen delivery pipeline to be connected with the second connecting pipeline through the three-way solenoid valve, and the nitrogen is delivered to the breathing valve from the nitrogen delivery pipeline and the second connecting pipeline in turn and the breathing valve is purged for the second preset time. Through this setting, the present application can effectively improve the cleaning efficiency of the breathing valve, while reducing the cleaning cost of the breathing valve and reducing the operation risk of the staff.

[0009] According to some embodiments of the present application, the breathing valve automatic cleaning system also includes a flame arrester, which is arranged on the vent pipe, and the air-opening valve is located between the flame arrester and the first connecting pipe.

[0010] According to some embodiments of the present application, the breathing valve automatic cleaning system also includes a normally open root valve, which is arranged on the first connecting pipe, the normally open root valve is arranged close to the storage tank, and the vent pipe is arranged between the normally open root valve and the air shut-off valve.

[0011] According to some embodiments of the present application, the breathing valve automatic cleaning system also includes a purge gas input pipe, and both ends of the purge gas input pipe are respectively connected to a purge gas inlet opened on the breathing valve and an output end of the second connecting pipe.

[0012] According to some embodiments of the present application, the storage tank is a normal pressure storage tank.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 A schematic diagram of the structure of the automatic cleaning system for the breathing valve provided in the embodiment of the present application;

[0016] Figure 2 A schematic diagram of the structure of a breathing valve provided in an embodiment of the present application.

[0017] Reference numerals:

[0018] Storage tank 110, first connecting pipe 111, normally open root valve 112, vent pipe 113, air-on valve 114, flame arrester 115, air-off valve 116, breathing valve 117, purge gas input pipe 118, exhaust port 119;

[0019] Distributed control cabinet 120 , pressure detector 121 , steam delivery pipeline 122 , nitrogen delivery pipeline 123 , three-way solenoid valve 124 , and second connecting pipeline 125 . DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0021] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0024] At present, chemical companies install breathing valves on the top of atmospheric pressure storage tanks to balance the air pressure in the tanks, reduce medium volatilization, and meet safety and environmental protection requirements. In order to prevent the breathing valve from being blocked and causing the tank to be pressurized or absorb negative pressure and cause production safety accidents, the breathing valve usually needs to be manually removed and cleaned once a month, and once a week in winter.

[0025] However, this method of cleaning the breathing valve has the following problems: whether the breathing valve is blocked can only be discovered after it is removed, the cleaning efficiency of the breathing valve is low, the escape of toxic and harmful gases during the removal process can easily cause certain safety risks for the workers, and the personnel need to be equipped with corresponding labor protection equipment when removing the breathing valve, which wastes material resources, and the frequent pipeline opening operations increase the safety risks of special operations.

[0026] In order to solve the above-mentioned problems, the present application proposes an automatic cleaning system for a breathing valve. The embodiments of the present application are further explained below in conjunction with the accompanying drawings.

[0027] Reference Figure 1 The present application provides an automatic cleaning system for a breathing valve, comprising: a storage tank 110, a steam delivery pipeline 122, a nitrogen delivery pipeline 123, a three-way solenoid valve 124, a distributed control cabinet 120, a vent pipe 113, an air-open valve 114, an air-close valve 116, a breathing valve 117, a normally open root valve 112, a first connecting pipeline 111, a second connecting pipeline 125 and a pressure detector 121; a distributed control system is provided in the distributed control cabinet 120, the pressure detector 121 is provided at the top of the storage tank 110, the distributed control system is respectively connected to the pressure detector 121 and the three-way solenoid valve 124, and both ends of the first connecting pipeline 111 are respectively connected to the storage tank 110, The breathing valve 117 is connected, the air-off valve 116 is arranged on the first connecting pipe 111, and the air-off valve 116 is arranged close to the breathing valve 117, one end of the vent pipe 113 is connected to the first connecting pipe 111, the vent pipe 113 is arranged between the storage tank 110 and the air-off valve 116, and the air-on valve 114 is arranged on the vent pipe 113; the output end of the steam delivery pipe 122 and the output end of the nitrogen delivery pipe 123 are both connected to the input end of the second connecting pipe 125, the three-way solenoid valve 124 is arranged at the connection between the steam delivery pipe 122, the nitrogen delivery pipe 123 and the second connecting pipe 125, and the output end of the second connecting pipe 125 is connected to the breathing valve 117.

[0028] It should be noted that the air-open valve 114 refers to a control valve in which the opening of the regulating valve increases when the air pressure signal input to the valve increases, and the valve is closed when there is no input air pressure signal; the air-close valve 116 refers to a control valve in which the opening of the regulating valve decreases until it is closed when the air pressure signal input to the valve increases, and the valve is opened when there is no input air pressure signal; by setting the air-close valve 116, the nitrogen or steam introduced into the breathing valve 117 is prevented from entering the storage tank 110.

[0029] It should be noted that the vent pipe 113 is a device used to discharge the gas inside the storage tank 110 when cleaning the breathing valve 117 to avoid abnormal gas pressure in the storage tank 110.

[0030] In the present application, the pressure detector 121 is used to detect whether the pressure in the storage tank 110 reaches a preset pressure threshold, and generates a pressure detection signal after reaching the preset threshold and outputs the pressure detection signal to the distributed control system; the distributed control system is used to control the steam delivery pipeline 122 to be connected with the second connecting pipeline 125 through the three-way solenoid valve 124 according to the pressure detection signal, so that the steam can be sequentially delivered to the breathing valve 117 through the steam delivery pipeline 122 and the second connecting pipeline 125 and the breathing valve 117 is purged for a first preset time, at which time the air shut-off valve 116 is closed, and the storage tank 110 is in a state of being ... The gas in 10 drives the gas-opening valve 114 to open and can be discharged from the vent pipe 113 to avoid abnormal pressure release of the storage tank 110; after the breathing valve 117 is purged with steam to the first preset time, it is discharged from the common exhaust port 119 of the breathing valve 117, and the distributed control system controls the nitrogen delivery pipeline 123 to be connected with the second connecting pipeline 125 through the three-way solenoid valve 124. Nitrogen is successively delivered to the breathing valve 117 from the nitrogen delivery pipeline 123 and the second connecting pipeline 125, and the breathing valve 117 is purged for the second preset time and then discharged. At this time, the gas-closing valve 116 is also in a closed state. Through this setting, the present application can effectively improve the cleaning efficiency of the breathing valve 117, while reducing the cleaning cost of the breathing valve 117 and reducing the operating risks of the staff.

[0031] In this embodiment, the first preset time is 5 minutes, and the second preset time is 2 minutes. In other embodiments, the first preset time and the second preset time may also be set to other times, and are not limited to the embodiments of the present application.

[0032] Reference Figure 1 It can be understood that the breathing valve automatic cleaning system also includes a flame arrester 115, which is arranged on the discharge pipe 113, and the air-opening valve 114 is located between the flame arrester 115 and the first connecting pipe 111.

[0033] It should be noted that the flame arrester 115 on the discharge pipe 113 is a fire protection device specifically used to prevent the flame from extending downward. Its principle is to convert the normally discharged gas into an upward airflow through the discharge pipe 113, thereby forming an area to block the rising flame and effectively prevent the spread of fire.

[0034] Reference Figure 1 It can be understood that the breathing valve automatic cleaning system also includes a normally open root valve 112, which is arranged on the first connecting pipe 111, the normally open root valve 112 is arranged close to the storage tank 110, and the vent pipe 113 is arranged between the normally open root valve 112 and the air shut-off valve 116.

[0035] Reference Figure 2It can be understood that the breathing valve automatic cleaning system also includes a purge gas input pipe 118, and the two ends of the purge gas input pipe 118 are respectively connected to the purge gas inlet opened on the breathing valve 117 and the output end of the second connecting pipe 125.

[0036] It should be noted that, by opening a purge gas inlet on the breathing valve 117 and providing a purge gas input pipe 118 , steam and nitrogen can be introduced into the breathing valve 117 .

[0037] It can be understood that the storage tank 110 is a normal pressure storage tank.

[0038] It should be noted that the atmospheric pressure storage tank refers to a steel welded storage tank 110 with a design pressure less than or equal to 1 / 3 atmospheric pressure (gauge), built on the ground, and storing non-artificially refrigerated, non-highly toxic liquid media such as petroleum and chemicals.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

[0041] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An automatic cleaning system for a breathing valve, characterized in that: include: Storage tank, steam delivery pipeline, nitrogen delivery pipeline, three-way solenoid valve, decentralized control cabinet, vent pipe, air-open valve, air-close valve, breathing valve, normally open root valve, first connecting pipeline, second connecting pipeline and pressure detector; The distributed control cabinet is provided with a distributed control system, the pressure detector is provided on the top of the storage tank, the distributed control system is respectively connected to the pressure detector and the three-way solenoid valve, the two ends of the first connecting pipe are respectively connected to the storage tank and the breathing valve, the air-off valve is provided on the first connecting pipe, and the air-off valve is provided close to the breathing valve, one end of the vent pipe is communicated with the first connecting pipe, the vent pipe is provided between the storage tank and the air-off valve, and the air-on valve is provided on the vent pipe; The output end of the steam delivery pipeline and the output end of the nitrogen delivery pipeline are both connected to the input end of the second connecting pipeline. The three-way solenoid valve is arranged at the connection between the steam delivery pipeline, the nitrogen delivery pipeline and the second connecting pipeline. The output end of the second connecting pipeline is connected to the breathing valve.

2. The automatic cleaning system for the breathing valve according to claim 1 is characterized in that: The automatic cleaning system for the breathing valve further comprises a flame arrester, which is arranged on the discharge pipe, and the air-opening valve is located between the flame arrester and the first connecting pipe.

3. The automatic cleaning system for the breathing valve according to claim 1 is characterized in that: The automatic cleaning system for the breathing valve also includes a normally open root valve, which is arranged on the first connecting pipe. The normally open root valve is arranged close to the storage tank, and the vent pipe is arranged between the normally open root valve and the air shut-off valve.

4. The automatic cleaning system for the breathing valve according to claim 1 is characterized in that: The automatic cleaning system for the breathing valve further comprises a purge gas input pipe, and two ends of the purge gas input pipe are respectively connected to a purge gas inlet provided on the breathing valve and an output end of the second connecting pipe.

5. The automatic cleaning system for the breathing valve according to claim 1 is characterized in that: The storage tank is a normal pressure storage tank.

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