Online detection device for breather valve of atmospheric pressure storage tank in petrochemical industry

Abstract

The utility model discloses an online detection device for a breather valve of a petrochemical atmospheric storage tank, which comprises a first sealing disc, a first pressurizing disc, a second sealing disc, a second pressurizing disc, an inflation pipeline, an exhaust pipeline, a pressurizing needle valve, an exhaust needle valve, a vacuum pump, a first pressure gauge and a second pressure gauge, the inflation pipeline is connected with a suction valve of the breather valve through a first sealing disc and a first pressurization disc, the exhaust pipeline is connected with an exhalation valve of the breather valve through a second sealing disc and a second pressurization disc, the pressurization needle valve is arranged on the inflation pipeline, the exhaust needle valve and the vacuum pump are arranged on the exhaust pipeline, and two first pressure gauges are arranged on the first pressurization disc. And two second pressure gauges are arranged at the second pressurizing disc. The atmospheric sides of the suction valve and the exhalation valve are pressurized through the inflation pipeline and the exhaust pipeline respectively, and the pressure change condition in the tank is simulated, so that whether the suction valve and the exhalation valve are normally opened or not is judged, the working state of the breather valve is detected on line, the detection efficiency of the breather valve is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of breathing valve detection, in particular to an online detection device for a breathing valve of a petrochemical atmospheric pressure storage tank. Background Art

[0002] As of 2023, my country's oil production and storage capacity is about 3.9 billion tons / year, with about 35,000 petroleum and petrochemical storage tanks and a total tank capacity of about 350 million cubic meters. These storage tanks and pipelines are an important part of my country's strategic energy reserve system. Petroleum products are usually flammable, explosive, and toxic, so they must be reasonably controlled during storage and transportation to ensure their safety, and the storage safety of petroleum products is a key factor in ensuring the safe production of enterprises.

[0003] At present, many companies are negligent in the management of tank areas, and there are weak links, making it an important safety shortcoming in the hazardous chemicals industry. As a major source of danger, once an accident occurs, it will bring huge losses. The safety risk classification of storage tanks mainly includes overpressure, negative pressure, overtemperature, corrosion and other aspects. Among them, overpressure and negative pressure phenomena may cause deformation and failure of the tank body. This risk is mainly eliminated by achieving a balance between the pressure inside and outside the storage tank, and the pressure balance is mainly achieved through the breather valve. The failure of the breather valve may cause serious equipment accidents, so the breather valve needs to be inspected regularly.

[0004] At present, the main means of testing breathing valves in China is disassembly testing. However, due to the volume of atmospheric pressure storage tanks used in petrochemicals, the weight of the breathing valves themselves, and the safety requirements of explosion-proof areas, disassembly and installation require considerable expenses. Testing using existing online testing methods requires a large amount of initial investment in the early stages of tank construction.

[0005] To sum up, in order to strengthen the management of petrochemical tank areas, implement relevant standards, improve the level of tank area management and hidden danger control of each unit, and promote new technologies in petrochemical storage and transportation tank areas, it is necessary to develop special online detection equipment for the breathing valves of petrochemical storage tanks to improve the current situation. Utility Model Content

[0006] To solve the above technical problems, the utility model discloses an online detection device for a breathing valve of a petrochemical atmospheric pressure storage tank, comprising a first sealing disk, a first pressurizing disk, a second sealing disk, a second pressurizing disk, an inflation pipeline, an exhaust pipeline, a pressurizing needle valve, an exhaust needle valve, a vacuum pump, a first pressure gauge and a second pressure gauge. The inflation pipeline is connected to the suction valve of the breathing valve through the first sealing disk and the first pressurizing disk, the exhaust pipeline is connected to the exhalation valve of the breathing valve through the second sealing disk and the second pressurizing disk, the pressurizing needle valve is arranged on the inflation pipeline, the exhaust needle valve and the vacuum pump are arranged on the exhaust pipeline, two first pressure gauges are arranged at the first pressurizing disk, and two second pressure gauges are arranged at the second pressurizing disk.

[0007] Furthermore, the first sealing disk is arranged at the air inlet of the suction valve through a first sealing sleeve, a first through hole is provided at the center of the first sealing disk, a first baffle is provided on the inner side of the first through hole, and the first pressure disk is arranged in the first through hole through a first sealing ring.

[0008] Furthermore, the second sealing disk is arranged at the air outlet of the exhalation valve through a second sealing sleeve, a second through hole is provided at the center of the second sealing disk, a second baffle is provided on the inner side of the second through hole, and the second pressure disk is arranged in the second through hole through a second sealing ring.

[0009] Furthermore, the first sealing disk and the second sealing disk are both made of transparent plastic sheets.

[0010] Furthermore, a sealing valve is provided on the air extraction pipeline between the vacuum pump and the exhalation valve.

[0011] Furthermore, one end of the inflation pipeline and the exhaust pipeline is connected to a gas cylinder via a common pipeline, and a main valve is also provided on the common pipeline.

[0012] Furthermore, a pressure reducing valve is also provided on the common pipeline on the other side of the main valve.

[0013] Furthermore, the inflation pipeline and the exhaust pipeline are both provided with grounding wires.

[0014] Furthermore, the vacuum pump is also provided with a muffler.

[0015] The beneficial effects of the utility model are:

[0016] The atmospheric sides of the suction valve and the exhalation valve are pressurized respectively through the inflation pipeline and the exhaust pipeline to simulate the pressure change in the tank, so that the suction valve and the exhalation valve reach the opening pressure respectively, and then the movement of the valve plates of the suction valve and the exhalation valve are observed through the first sealing disk and the second sealing disk, and the readings of the first pressure gauge and the second pressure gauge are recorded to determine whether the suction valve and the exhalation valve are opened normally, thereby realizing online detection of the working status of the breathing valve without disassembling the valve body, thereby improving the detection efficiency of the breathing valve, reducing the disassembly and assembly investment and a large amount of equipment investment in the initial construction, and thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1It is the structural principle diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the breathing valve in the utility model.

[0020] Reference numerals:

[0021] 1-first sealing disk, 2-first pressurizing disk, 3-second sealing disk, 4-second pressurizing disk, 5-inflating pipeline, 6-exhaust pipeline, 7-pressurizing needle valve, 8-exhaust needle valve, 9-vacuum pump, 10-sealing valve, 11-first pressure gauge, 12-second pressure gauge, 13-common pipeline, 14-gas cylinder, 15-main valve, 16-pressure reducing valve, 17-grounding wire, 18-breathing valve, 18a-inhalation valve, 18b-exhalation valve, 19-muffler, 20-first sealing sleeve, 21-first through hole, 22-first baffle, 23-first sealing ring, 24-second sealing sleeve, 25-second through hole, 26-second baffle, 27-second sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0025] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or it can be connected through an intermediate medium, or it can be a communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] like Figure 1-2As shown, the breathing valve online detection device of the petrochemical atmospheric pressure storage tank in this embodiment includes a first sealing disk 1, a first pressurizing disk 2, a second sealing disk 3, a second pressurizing disk 4, an inflation pipeline 5, an exhaust pipeline 6, a pressurizing needle valve 7, an exhaust needle valve 8, a vacuum pump 9, a sealing valve 10, a first pressure gauge 11, a second pressure gauge 12, a common pipeline 13, a gas cylinder 14, a main valve 15, a pressure reducing valve 16 and a grounding wire 17.

[0027] The inflation pipeline 5 is connected to the suction valve 18a of the breathing valve 18 through the first sealing disk 1 and the first pressurizing disk 1, and the exhaust pipeline 6 is connected to the exhalation valve 18b of the breathing valve 18 through the second sealing disk 3 and the second pressurizing disk 4. The other ends of the inflation pipeline 5 and the exhaust pipeline 6 are connected to the common pipeline 13, and the other end of the common pipeline 13 is connected to the gas cylinder 14, which contains inert compressed gas, such as nitrogen, helium, etc.

[0028] The main valve 15 is arranged on the common pipeline 13 at one side close to the gas cylinder 14 , and the pressure reducing valve 16 is arranged at the other side of the main valve 15 .

[0029] The pressurizing needle valve 7 is arranged on the inflation pipeline 5, the exhaust needle valve 8 and the vacuum pump 9 are arranged on the exhaust pipeline 6, and the vacuum pump 9 is also provided with a muffler 19 for weakening the noise generated when the vacuum pump 9 is working; two first pressure gauges 11 are arranged at the first pressurizing plate 2, and two second pressure gauges 12 are arranged at the second pressurizing plate 4; the purpose of setting two pressure gauges is, on the one hand, to use the readings of the two pressure gauges as a reference to each other, so as to ensure the accuracy of the pressure value, and on the other hand, to avoid one of the pressure gauges being damaged and unable to obtain the pressure value.

[0030] The sealing valve 10 is arranged on the exhaust pipe 6 between the vacuum pump 9 and the exhalation valve 18b. Since the device adopts compressed gas as the power source, in order to prevent static electricity ignition, a grounding wire 17 is provided on the charging pipe 5 and the exhaust pipe 6 to release static electricity.

[0031] The first sealing disk 1 is arranged at the air inlet of the suction valve 18a through the first sealing sleeve 20. A first through hole 21 is provided at the center of the first sealing disk 1. A first baffle 22 is provided on the inner side of the first through hole 21. The first pressure disk 2 is arranged in the first through hole 21 through the first sealing ring 23.

[0032] The second sealing disk 3 is arranged at the air outlet of the exhalation valve 18b through the second sealing sleeve 24. A second through hole 25 is provided at the center of the second sealing disk 3. A second baffle 26 is provided on the inner side of the second through hole 25. The second pressure disk 4 is arranged in the second through hole 25 through the second sealing ring 27.

[0033] Wherein, the first sealing disk 1 and the second sealing disk 3 are both made of transparent plastic plates, such as PMMA plates, PC plates, PP plates, PE plates, etc.

[0034] The detection principle of this device is to use the pressurization method and reverse pressure difference method in Appendix C3.3.1 of the standard "T / CCSAS 042-2023 Technical Specifications for Inspection and Applicability Evaluation of In-service Atmospheric Storage Tanks" for online inspection. It only detects whether the valve can be opened normally. The discharge volume can be calculated based on the opening pressure difference and the diameter to obtain the corresponding data.

[0035] The detection process of the breathing valve by this device is as follows:

[0036] 1. Suction valve detection

[0037] (1) Connect the first sealing disc 1 to the atmosphere side of the suction valve 18a through the first sealing sleeve 20 and press it tightly to ensure the sealing surface fits;

[0038] (2) Connect the inflation pipeline 5 to the first pressure plate 2 and the gas cylinder 14 through a quick connector;

[0039] (3) Open the main valve 15 to provide a high-pressure gas source for the entire system, and then open the pressure reducing valve 16 to reduce the high-pressure gas source in the gas cylinder 14 to a normal operating pressure;

[0040] (4) Open the pressurizing needle valve 7 and slowly pressurize the atmospheric side of the suction valve 18a so that the pressure difference between the inside and outside reaches the opening pressure;

[0041] (5) Observe the valve plate movement of the suction valve 18a through the first sealing disk 1, record the reading changes of the two first pressure gauges 11, and confirm whether the suction valve 18a is operating normally;

[0042] (6) Close the pressurizing needle valve 7 and observe whether the valve plate of the suction valve 18a falls back normally;

[0043] (7) Repeat steps (3) to (6) to confirm again whether the suction valve 18a is operating normally.

[0044] 2. Exhalation valve detection

[0045] (1) Connect the second sealing disk 3 to the atmosphere side of the call valve 18b and press it tightly to ensure the sealing surface fits;

[0046] (2) Connect the air extraction pipeline 6 to the second pressure plate 4 and the gas cylinder 14 through a quick connector;

[0047] (3) Open the main valve 15 to provide a high-pressure gas source for the entire system, and then open the pressure reducing valve 16 to reduce the high-pressure gas source in the gas cylinder 14 to a normal operating pressure;

[0048] (4) Open the exhaust needle valve 8, start the vacuum pump 9, open the sealing valve 10, and start to extract the gas on the atmospheric side of the exhalation valve 18b so that the internal and external pressure difference reaches the opening pressure;

[0049] (5) Observe the valve plate movement of the call valve 18b through the second sealing disk 3, record the reading changes of the two second pressure gauges 12, and confirm whether the call valve 18b is operating normally;

[0050] (6) Close the sealing valve 10 and observe whether the valve plate of the call valve 18b falls back normally;

[0051] (7) Repeat steps (3) to (6) to confirm again whether the call valve 18b is operating normally.

[0052] In summary, the device pressurizes the atmospheric side of the suction valve 18a and the exhalation valve 18b through the inflation pipeline 5 and the exhaust pipeline 6 respectively, simulates the pressure change in a common storage tank, makes the suction valve 18a and the exhalation valve 18b reach the opening pressure respectively, and then observes the valve plate movement status of the suction valve 18a and the exhalation valve 18b through the first sealing disk 1 and the second sealing disk 3, and records the readings of the two first pressure gauges 11 and the second pressure gauges 12, so as to judge whether the suction valve 18a and the exhalation valve 18b are opened normally, thereby realizing online detection of the working status of the breathing valve, without disassembling the valve body, improving the detection efficiency of the breathing valve, and reducing the disassembly and assembly investment and a large amount of equipment investment in the initial construction, thereby saving costs.

[0053] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. An online detection device for a breathing valve of a petrochemical atmospheric pressure storage tank, characterized in that: The breathing valve comprises a first sealing plate, a first pressurizing plate, a second sealing plate, a second pressurizing plate, an inflation pipeline, an exhaust pipeline, a pressurizing needle valve, an exhaust needle valve, a vacuum pump, a first pressure gauge and a second pressure gauge. The inflation pipeline is connected to the suction valve of the breathing valve through the first sealing plate and the first pressurizing plate, the exhaust pipeline is connected to the exhalation valve of the breathing valve through the second sealing plate and the second pressurizing plate, the pressurizing needle valve is arranged on the inflation pipeline, the exhaust needle valve and the vacuum pump are arranged on the exhaust pipeline, two first pressure gauges are arranged at the first pressurizing plate, and two second pressure gauges are arranged at the second pressurizing plate.

2. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 1 is characterized in that: The first sealing disk is arranged at the air inlet of the suction valve through a first sealing sleeve, a first through hole is arranged at the center of the first sealing disk, a first baffle is arranged inside the first through hole, and the first pressure disk is arranged in the first through hole through a first sealing ring.

3. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 2 is characterized in that: The second sealing disk is arranged at the air outlet of the exhalation valve through a second sealing sleeve, a second through hole is arranged at the center of the second sealing disk, a second baffle is arranged inside the second through hole, and the second pressure disk is arranged in the second through hole through a second sealing ring.

4. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 3 is characterized in that: The first sealing disk and the second sealing disk are both made of transparent plastic sheets.

5. The breathing valve online detection device for petrochemical atmospheric pressure storage tank according to claim 1 is characterized in that: A sealing valve is arranged on the air extraction pipeline between the vacuum pump and the exhalation valve.

6. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 1 is characterized in that: One end of the gas charging pipeline and the gas exhaust pipeline is connected to a gas cylinder via a common pipeline, and a main valve is also arranged on the common pipeline.

7. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 6 is characterized in that: A pressure reducing valve is also provided on the public pipeline on the other side of the main valve.

8. The breathing valve online detection device for petrochemical atmospheric pressure storage tank according to claim 1 is characterized in that: The inflation pipeline and the exhaust pipeline are both provided with grounding wires.

9. The breathing valve online detection device for a petrochemical atmospheric pressure storage tank according to claim 1 is characterized in that: The vacuum pump is also provided with a muffler.

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