An integrated monitoring outlet valve

Abstract

The utility model discloses an integration monitoring exhale valve, including exhale valve body, flame arrester and be used for monitoring pressure differential pressure transmitter, and the air inlet end and the air outlet end of exhale valve body are equipped with high pressure side short connection and low pressure side short connection respectively, and the flame arrester is integrated in the air inlet channel of high pressure side short connection, is provided with high pressure pressure tapping on the pipe wall of high pressure side short connection, is equipped with low pressure pressure tapping on the pipe wall of low pressure side short connection, and high pressure pressure tapping is located in the downstream of flame arrester, differential pressure transmitter is installed on exhale valve body, and is communicated with high pressure pressure tapping and low pressure pressure tapping through compact connection component, the utility model discloses utilize existing process structure (flame arrester), through integrated differential pressure measurement technology, realizes the real -time monitoring and early warning of exhale valve working condition (open -close frequency, opening time, whether jam, whether internal leakage) and the health state of associated equipment (whether flame arrester pressure drop increases).

Description

Technical Field

[0001] This utility model relates to the technical field of storage tank safety protection equipment, specifically to an integrated monitoring and exhalation valve. Background Technology

[0002] Exhalation valves are key safety devices in the petroleum, chemical, and energy industries that protect storage tanks from overpressure or vacuum damage. Their core function is to automatically maintain the pressure and vacuum inside the tank within a set safe range by opening and reseating the valve disc, thus preventing structural damage to the storage tank due to overpressure or vacuum.

[0003] A traditional exhalation valve is a purely mechanical device, and its working status (such as whether it is opened normally, whether it reseats tightly, and whether it is stuck) is like a "black box" that cannot be detected in real time for a long time.

[0004] Currently, the industry generally relies on periodic offline manual inspections for the maintenance of exhalation valves. Inspectors need to climb to the top of the storage tank and judge the valve status by observing mechanical indicators or through experience. This method is inefficient, labor-intensive, poses safety risks of working at height, and cannot detect hidden faults in the exhalation valve that occur during the inspection intervals.

[0005] Currently, the pressure inside the tank is indirectly inferred by installing a pressure transmitter separately on the top of the tank. However, this method cannot directly and accurately monitor the operating status and performance of the exhalation valve itself, nor can it diagnose specific faults such as internal leakage of the valve disc. In addition, the split-type pressure tap installation method has problems such as easy clogging, response delay, and complicated installation. Summary of the Invention

[0006] In order to fundamentally solve the many problems caused by traditional pressure tapping tubes, this utility model provides an integrated monitoring exhalation valve that deeply integrates differential pressure monitoring function with the exhalation valve body, enabling real-time and direct monitoring of the exhalation valve's working status.

[0007] The technical solution adopted is as follows: An integrated monitoring exhalation valve includes an exhalation valve body, a flame arrester, and a differential pressure transmitter for monitoring pressure. The exhalation valve body has a high-pressure side short circuit and a low-pressure side short circuit at its inlet and outlet ends, respectively. The flame arrester is integrated into the inlet channel of the high-pressure side short circuit. A high-pressure tap is provided on the pipe wall of the high-pressure side short circuit, and a low-pressure tap is provided on the pipe wall of the low-pressure side short circuit. The high-pressure tap is located downstream of the flame arrester. The differential pressure transmitter is mounted on the exhalation valve body and is connected to the high-pressure tap and the low-pressure tap via a compact connection assembly.

[0008] Preferably, the compact connection assembly includes a three-valve group and a pressure tapping pipe. The two ends of the three-valve group are connected to the high-pressure tapping port and the low-pressure tapping port through the pressure tapping pipe. The differential pressure transmitter is mounted on the three-valve group.

[0009] More preferably, the high-pressure tap is a circular hole, and the distance between its central axis and the outlet end face of the flame arrester is not less than one times the nominal diameter of the high-pressure side short circuit.

[0010] In a further preferred embodiment, the distance between the central axis of the high-pressure tap and the outlet end face of the flame arrester is 1 to 2 times the nominal diameter of the high-pressure side short circuit.

[0011] More preferably, the differential pressure transmitter is a micro differential pressure transmitter.

[0012] More preferably, the process interface on the exhalation valve body for connecting to an external pipeline is a standard flange.

[0013] Furthermore, the differential pressure transmitter monitors the pressure difference across the valve disc of the exhalation valve body in real time and outputs an electrical signal related to the pressure difference.

[0014] More preferably, the lengths of the high-pressure side short circuit and the low-pressure side short circuit are 2 to 3 times the nominal diameters of the inlet and outlet ends of the exhalation valve body, respectively.

[0015] The technical solution of this utility model has the following advantages: A. This utility model can accurately capture the entire process of opening, releasing, and reseating the exhalation valve by directly measuring the pressure difference on both sides of the valve disc, and realize real-time monitoring of key performance parameters such as operation frequency, opening pressure, and reseating pressure. It fully retains its original safety characteristics and maintenance convenience. The fire prevention function of the flame arrester and the pressure release function of the exhalation valve are fully retained, and their performance is not affected.

[0016] B. This utility model adopts an integrated connection with an extremely short path or built-in flow channel, which completely eliminates the risk of blockage, condensation, leakage and other failures that exist in traditional long pressure tapping tubes, resulting in faster measurement response and significantly improved system reliability; C. This utility model uses a three-valve assembly installed on the exhalation valve body. The measuring end of the differential pressure transmitter is connected to the high-pressure tap and the low-pressure tap through an extremely short path, thus forming a complete modular unit with a standard installation interface, which can be used "on the spot", greatly simplifying the on-site installation, replacement and calibration process, and facilitating maintenance and installation.

[0017] D. This utility model uses a differential pressure transmitter to monitor the pressure difference changes on both sides of the exhalation valve disc in real time and outputs an electrical signal related to the pressure difference, providing the most direct and reliable data source for subsequent predictive maintenance of the exhalation valve (such as diagnosis of spring performance decay, valve disc jamming, internal leakage of the seal, etc.). Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the exhalation valve provided by this utility model.

[0020] The markings in the image are as follows: 1-Exit valve body, 1a-Valve disc, 11-High-pressure side short circuit, 12-Low-pressure side short circuit 2-Flame arrester; 3-High-pressure tap; 4-Low-pressure tap; 5-Differential pressure transmitter 6- Standard flange; 7- Compact connection assembly; 71- Three-valve manifold; 72- Pressure tap. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] like Figure 1As shown, this utility model provides an integrated monitoring exhalation valve, including an exhalation valve body 1, a flame arrester 2 integrated into the air inlet channel of the exhalation valve body 1, and a differential pressure transmitter 5 for monitoring pressure. The air inlet and outlet ends of the exhalation valve are each integrated with a dedicated pressure tapping short-circuit, namely a high-pressure side short-circuit 11 and a low-pressure side short-circuit 12. These are extension pipe sections with the same diameter as the exhalation valve body 1, and are preferably connected to the exhalation valve body 1 and process pipelines at both ends via standard flanges 6. The lengths of the high-pressure side short-circuit 11 and the low-pressure side short-circuit 12 are 2 to 3 times the nominal diameters of the air inlet and outlet ends of the exhalation valve body 1, respectively. A high-pressure tap 3 is provided on the high-pressure side short circuit 11, and a low-pressure tap 4 is provided on the low-pressure side short circuit 12. The high-pressure tap 3 is located downstream of the flame arrester 2. A differential pressure transmitter 5 is installed on the exhalation valve body 1, preferably a micro differential pressure transmitter, and is connected to the high-pressure tap 3 and the low-pressure tap 4 through a compact connection assembly 7. It can be seen that the high-pressure tap 3 is located between the flame arrester 2 and the valve disc 1a disposed inside the exhalation valve body 1.

[0023] A high-pressure tap 3 is opened on the high-pressure side short circuit 11 to sense the actual pressure inside the storage tank; since the low-pressure side short circuit 12 is installed at the outlet of the exhalation valve body 1, it is located between the valve disc 1a and the atmosphere, and the low-pressure tap 4 here is used to sense the reference pressure of the atmosphere (or the exhaust gas pipeline).

[0024] The compact connection assembly 7 used in this invention includes a three-valve manifold 71 and a pressure tapping pipe 72. The two ends of the three-valve manifold 71 are connected to the high-pressure tapping port 3 and the low-pressure tapping port 4 via the pressure tapping pipe 72. The differential pressure transmitter 5 is mounted on the three-valve manifold 71. The high and low pressure measuring chambers of the differential pressure transmitter 5 are directly connected to the corresponding pressure tapping ports through the three-valve manifold 71 and the pressure tapping pipe 72. The resulting pressure tapping path is extremely short and the response is extremely fast. The integrated differential pressure transmitter 5 and the exhalation valve body 1 form a robust whole, exhibiting good vibration resistance and a compact appearance.

[0025] The high-pressure tap 3 is preferably a circular tap structure, and the distance between its central axis and the outlet end face of the flame arrester 2 is not less than one time the nominal diameter of the high-pressure side short circuit 11, and preferably one to two times the nominal diameter of the high-pressure side short circuit 11. For example, the high-pressure tap 3 is opened on the high-pressure side short circuit 11 at a position approximately 1.5 times the pipe diameter downstream of the flame arrester 2. The high-pressure tap 3 is located in the stable flow field region downstream of the integrated flame arrester 2 to ensure accurate pressure sampling.

[0026] This invention features a low-pressure tap 4 on the low-pressure side short circuit 12. A differential pressure transmitter serves as the core measuring device, directly mounted on the exhalation valve body 1 via a three-valve assembly 71. The two ends of the three-valve assembly 71 are connected to the high-pressure tap 3 and the low-pressure tap 4 respectively via metal pressure-sensing pipes 72. The entire device is connected to the storage tank pipeline via its standard flange 6. After power-on, it can monitor and output the differential pressure signal across the valve disc 1a in real time, thereby achieving online monitoring of the exhalation valve's operating status.

[0027] Example: The nameplate parameters of the exhalation valve of a material storage tank in a chemical plant are as follows: Positive pressure opening setting (PO): +1.5 kPa Positive pressure reseating setting (PR): +1.2 kPa —During a material receiving operation, the differential pressure transmitter recorded the following data:

[0028] Analysis of this action: Duration = 25 seconds (10:05:55 - 10:05:30) Actual opening pressure = 1.5 kPa Actual reseating pressure = 1.2 kPa Maximum overshoot pressure = 1.7 kPa The system allows you to configure settings such as: action counter +1 / alarm prompts, etc.

[0029] This invention deeply integrates differential pressure monitoring with the exhalation valve body, enabling real-time and direct monitoring of the exhalation valve's operating status and fundamentally solving many problems associated with traditional pressure taps. Simultaneously, while providing monitoring functionality, it fully retains the original safety features and ease of maintenance; the flame arrester's fire prevention function and the exhalation valve's pressure relief function are both fully preserved without affecting their performance. The entire exhalation valve unit connects to the storage tank via its standard process interface, allowing for quick replacement or inspection as a single component, ready for immediate use upon disassembly. Through the isolation device set in the three-valve manifold and pressure tap, this invention allows for the isolation, zeroing, or disassembly of the differential pressure transmitter without affecting the storage tank's operation, facilitating daily maintenance and calibration, and achieving convenient maintenance.

[0030] Any aspects not covered in this utility model are applicable to the prior art.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An integrated monitoring exhalation valve, comprising an exhalation valve body (1), a flame arrester (2), and a differential pressure transmitter (5) for monitoring pressure, wherein the inlet and outlet ends of the exhalation valve body (1) are respectively provided with a high-pressure side short circuit (11) and a low-pressure side short circuit (12), and the flame arrester (2) is integrated into the inlet channel of the high-pressure side short circuit (11), characterized in that, A high-pressure tap (3) is provided on the pipe wall of the high-pressure side short circuit (11), and a low-pressure tap (4) is provided on the pipe wall of the low-pressure side short circuit (12). The high-pressure tap (3) is located downstream of the flame arrester (2). The differential pressure transmitter (5) is installed on the exhalation valve body (1) and is connected to the high-pressure tap (3) and the low-pressure tap (4) through a compact connection assembly (7).

2. The integrated monitoring exhalation valve according to claim 1, characterized in that, The compact connection assembly (7) includes a three-valve group (71) and a pressure tap (72). The two ends of the three-valve group (71) are connected to the high-pressure tap (3) and the low-pressure tap (4) through the pressure tap (72). The differential pressure transmitter (5) is installed on the three-valve group (71).

3. The integrated monitoring exhalation valve according to claim 1, characterized in that, The high-pressure tap (3) is a circular hole, and the distance between its central axis and the outlet end face of the flame arrester (2) is not less than one times the nominal diameter of the high-pressure side short circuit (11).

4. The integrated monitoring exhalation valve according to claim 3, characterized in that, The distance between the central axis of the high-pressure tap (3) and the outlet end face of the flame arrester (2) is 1 to 2 times the nominal diameter of the high-pressure side short circuit (11).

5. The integrated monitoring exhalation valve according to claim 1, characterized in that, The differential pressure transmitter (5) is a micro differential pressure transmitter.

6. The integrated monitoring exhalation valve according to claim 1, characterized in that, The process interface on the exhalation valve body (1) for connecting to external pipelines is a standard flange.

7. The integrated monitoring exhalation valve according to any one of claims 1 to 6, characterized in that, The differential pressure transmitter (5) monitors the pressure difference changes on both sides of the valve disc (1a) of the exhalation valve body (1) in real time and outputs an electrical signal related to the pressure difference.

8. The integrated monitoring exhalation valve according to claim 7, characterized in that, The lengths of the high-pressure side short circuit (11) and the low-pressure side short circuit (12) are 2 to 3 times the nominal diameters of the inlet and outlet ends of the exhalation valve body (1), respectively.

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