An inert gas purging assembly for an online detection device of a tank breather valve

Abstract

The utility model discloses a kind of inert gas purging subassemblies for storage tank breather valve on-line detection device, it is related to storage tank breather valve on-line detection technical field, including breather valve body, the flange of breather valve body bottom is connected with auxiliary valve body, and auxiliary valve body includes the auxiliary valve body of being set to outside.This application provides a kind of inert gas purging subassemblies for storage tank breather valve on-line detection device, open the positive pressure gas valve on first detection gas path, inert gas in gas cylinder enters into breather valve body from bottom to top by purging interface, first inert gas enters into breather valve body and replaces residual air and medium steam, establishes inert environment, avoids environmental pollution or production loss caused by medium exfiltration in detection process, then executor drives valve plate to close, isolation detection cavity and storage tank inside, then the pressure data of being passed into breather valve body is recorded by pressure gauge, to monitor whether the normality of the positive pressure expiration state of breather valve body is normal from this.

Description

Technical Field

[0001] This utility model relates to the field of online detection technology for breather valves of storage tanks, specifically an inert gas purging assembly for an online detection device for breather valves of storage tanks. Background Technology

[0002] The breather valve is a safe and energy-saving product used to maintain the pressure balance of storage tanks and reduce the evaporation of media. It fully utilizes the pressure-bearing capacity of the storage tank itself to reduce media discharge. It primarily controls the positive pressure of exhaust and the negative pressure of intake through the weight of the positive and negative pressure valve discs. When the pressure of the media inside the tank is within the control operating pressure range of the breather valve, the valve does not operate, maintaining the tank's seal. When media is added to the tank, the pressure in the upper gas space increases, reaching the positive operating pressure of the breather valve. At this point, the pressure valve opens, and gas escapes from the breather valve's outlet, preventing further pressure increases. When media is extracted from the tank, the pressure in the upper gas space decreases, reaching the negative operating pressure of the breather valve. At this point, the outside atmosphere presses against the negative pressure valve disc, allowing outside gas to enter the tank, preventing further pressure decreases and maintaining pressure balance between the inside and outside of the tank, thus protecting the storage tank.

[0003] As can be seen from the above records, the normal operation of the breather valve is an important part of ensuring the safety of oil storage in oil tanks. Therefore, it is necessary to check whether the breather valve is in good condition regularly. However, the current breather valve inspection requires shutting down multiple devices and removing the breather valve for separate inspection, which is inefficient and affects the daily safe operation of the oil tank. Utility Model Content

[0004] The purpose of this invention is to provide an inert gas purging assembly for an online detection device for a storage tank breather valve, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an inert gas purging assembly for an online detection device for a storage tank breather valve, comprising a breather valve body, a secondary valve body connected to the bottom flange of the breather valve body, the secondary valve body including a secondary valve body disposed externally, and a purging port connected to the detection port on the side end of the secondary valve body, and a tank interface connected to the bottom flange of the secondary valve body.

[0006] Furthermore, the purge port is connected to a gas cylinder, and a positive pressure valve is provided on the first detection gas line connected to the gas cylinder. The positive pressure valve is connected to the purge port through a pressure gauge.

[0007] Furthermore, a negative pressure valve is provided on the second detection gas line connected to the gas cylinder, and the negative pressure valve is connected to the purging interface through a vacuum generator.

[0008] Furthermore, the breathing valve body includes a breathing valve body disposed on the outside, a valve cover is bolted to the top of the breathing valve body, and an air outlet is connected to the side end of the breathing valve body.

[0009] Furthermore, the breathing valve body also includes two valve seats disposed inside the breathing valve body, and the valve seats correspond to two valve discs for positive pressure and negative pressure, respectively.

[0010] Furthermore, the secondary valve body also includes an actuator fixedly installed on the side end of the secondary valve body, and the actuator is drivenly connected to a valve plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. When using this utility model, the positive pressure valve on the first detection gas line is opened, and the inert gas in the gas cylinder enters the breathing valve body from bottom to top through the purge port. First, the inert gas enters the breathing valve body and replaces the residual air and medium vapor, establishing an inert environment to avoid environmental pollution or production loss caused by medium leakage during the detection process. Then, the actuator drives the valve plate to close, isolating the detection chamber from the inside of the storage tank. Then, the pressure data entering the breathing valve body is recorded by the pressure gauge, thereby monitoring online whether the positive pressure exhalation state of the breathing valve body is normal.

[0013] 2. When using this utility model, the negative pressure valve on the second detection gas line is opened and the positive pressure valve is closed accordingly. Inert gas is introduced into the vacuum generator to create a vacuum. At this time, the inside of the breathing valve body is under negative pressure, i.e., in a suction state. This is used to detect the valve closing response and vacuum maintenance capability. After the test is completed, the valve plate is opened and the breathing valve body is restored to the connection with the tank interface, ensuring that the breathing function is not affected. Online monitoring can be achieved without shutting down the equipment during the test, making it more applicable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of the device of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the device of this utility model;

[0016] Figure 3 This is a schematic diagram of the gas path arrangement structure of this utility model.

[0017] In the diagram: 1. Breathing valve body; 101. Breathing valve body; 102. Valve cover; 103. Air outlet; 104. Valve seat; 105. Valve disc; 2. Secondary valve body; 201. Secondary valve body; 202. Purge port; 203. Actuator; 204. Valve plate; 3. Tank interface; 4. Gas cylinder; 5. Positive pressure valve; 6. Pressure gauge; 7. Negative pressure valve; 8. Vacuum generator. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] like Figures 1 to 3 As shown, an inert gas purging assembly for an online detection device of a storage tank breather valve includes a breather valve body 1, a secondary valve body 2 connected to the bottom flange of the breather valve body 1, and the secondary valve body 2 including an externally disposed secondary valve body 201. A purging port 202 is connected to the detection port on the side of the secondary valve body 201. A tank interface 3 is connected to the bottom flange of the secondary valve body 201. A gas cylinder 4 is externally connected to the purging port 202. A positive pressure valve 5 is provided on the first detection gas line connected to the gas cylinder 4, and the positive pressure valve 5 is connected to a pressure gauge 6. The purge interface 202 is connected. The breathing valve body 1 includes a breathing valve body 101 disposed on the outside. A valve cover 102 is bolted to the top of the breathing valve body 101, and an air outlet 103 is connected to the side end of the breathing valve body 101. The breathing valve body 1 also includes two valve seats 104 disposed inside the breathing valve body 101, and the valve seats 104 are respectively corresponding to two valve discs 105 for positive pressure and negative pressure. The auxiliary valve body 2 also includes an actuator 203 fixedly installed on the side end of the auxiliary valve body 201, and the actuator 203 is drivenly connected to the valve plate 204.

[0020] The specific operation is as follows: Open the positive pressure valve 5 on the first detection gas line. The inert gas in the gas cylinder 4 enters the breathing valve body 101 from bottom to top through the purge port 202. First, the inert gas enters the breathing valve body 101 and replaces the residual air and medium vapor to establish an inert environment, so as to avoid the leakage of medium during the detection process, which may cause environmental pollution or production loss. Then, the actuator 203 drives the valve plate 204 to close, isolating the detection chamber from the inside of the storage tank. Then, the pressure data entering the breathing valve body 101 is recorded by the pressure gauge 6, thereby monitoring online whether the positive pressure exhalation state of the breathing valve body 1 is normal.

[0021] like Figures 1 to 3 As shown, a negative pressure valve 7 is installed on the second detection gas line connected to the gas cylinder 4, and the negative pressure valve 7 is connected to the purge port 202 through the vacuum generator 8.

[0022] The specific operation is as follows: Open the negative pressure valve 7 on the second detection gas line and close the positive pressure valve 5 accordingly. Inert gas is introduced into the vacuum generator 8 to generate a vacuum. At this time, the inside of the breathing valve body 101 is under negative pressure, i.e., inhalation state. This is used to detect the valve closing response and vacuum maintenance capability. After the test is completed, the valve plate 204 is opened, and the breathing valve body 1 resumes the connection with the tank interface 3, ensuring that the breathing function is not affected. Online monitoring can be achieved without shutting down the equipment during the test, making it more applicable.

[0023] Working principle: The positive pressure valve 5 on the first detection gas line is opened. Inert gas from cylinder 4 enters the breather valve body 101 from bottom to top through purge port 202. First, the inert gas enters the breather valve body 101 and replaces residual air and medium vapor, establishing an inert environment to prevent medium leakage during detection, which could cause environmental pollution or production losses. Then, actuator 203 drives valve plate 204 to close, isolating the detection chamber from the tank interior. Pressure gauge 6 records the pressure data entering the breather valve body 101, thereby monitoring the positive pressure exhalation state of the breather valve body 1 online. The negative pressure valve 7 on the second detection gas line is opened, and the positive pressure valve 5 is closed accordingly. Inert gas is introduced into the vacuum generator 8 to create a vacuum. At this time, the inside of the breather valve body 101 is under negative pressure, i.e., inhalation state, thus detecting the valve closing response and vacuum maintenance capability. After the detection is completed, valve plate 204 opens, and the breather valve body 1 resumes connection with the tank interface 3, ensuring that the breathing function is not affected. Online monitoring can be achieved without shutting down the equipment during the detection process, making it more versatile.

[0024] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An inert gas purging assembly for an online detection device for a storage tank breather valve, comprising a breather valve body (1), characterized in that, The bottom flange of the breathing valve body (1) is connected to a secondary valve body (2), and the secondary valve body (2) includes a secondary valve body (201) disposed externally. A purge port (202) is connected to the detection port on the side end of the secondary valve body (201). The bottom flange of the secondary valve body (201) is connected to a tank port (3). A gas cylinder (4) is connected to the purge port (202). A positive pressure valve (5) is provided on the first detection gas line connected to the gas cylinder (4). The positive pressure valve (5) is connected to the purge port (202) through a pressure gauge (6). The gas cylinder (4) is connected to the first detection gas line. The second detection gas path is provided with a negative pressure valve (7), and the negative pressure valve (7) is connected to the purge port (202) through the vacuum generator (8). The breathing valve body (1) includes a breathing valve body (101) set on the outside. The top of the breathing valve body (101) is bolted with a valve cover (102), and the side end of the breathing valve body (101) is connected to an air outlet (103). The breathing valve body (1) also includes two valve seats (104) set inside the breathing valve body (101), and the valve seats (104) are respectively corresponding to two valve discs (105) for positive pressure and negative pressure.

2. The inert gas purging assembly for an online detection device for a storage tank breather valve according to claim 1, characterized in that, The secondary valve body (2) also includes an actuator (203) fixedly installed on the side of the secondary valve body (201), and the actuator (203) is connected to the valve plate (204).

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