Breather valve verification tool

Abstract

The utility model discloses a breather valve verification tool, and belongs to the field of verification tools. A breather valve verification tool comprises a suitcase and a lining fixedly installed in the suitcase, and further comprises a nitrogen cylinder installed on the lining, the gas outlet end of the nitrogen cylinder is fixedly communicated with a pressure reducing valve, the end, away from the nitrogen cylinder, of the pressure reducing valve is fixedly communicated with a hose, and the hose is fixedly communicated with the nitrogen cylinder. The end, away from the pressure reducing valve, of the hose is fixedly communicated with a stop valve, and the end, away from the hose, of the stop valve is fixedly communicated with a pressure testing blind plate. According to the utility model, the nitrogen cylinder and the stop valve are installed in the suitcase, which is convenient for a worker to carry, so that the worker can check the breather valve on site, then the positive pressure of the breather valve can be checked by opening the nitrogen cylinder, and the hose close to one side of the pressure reducing valve is taken down and is connected to the air inlet end of the air pump, so that the check valve can check the positive pressure of the breather valve. The negative pressure of the breather valve can be verified.

Description

Technical Field

[0001] This utility model relates to the field of calibration tooling technology, and in particular to a calibration tooling for a breather valve. Background Technology

[0002] A breather valve is a type of valve that ensures the storage tank space is isolated from the atmosphere within a certain pressure range, while also allowing communication with the atmosphere when the pressure exceeds or falls below this range. Its function is to prevent damage to the storage tank due to overpressure or vacuum, and at the same time, it can reduce the evaporation loss of the stored liquid. Installing a breather valve can not only reduce the emission of gas from inside the tank, thereby reducing pollution to the atmosphere, but also prevent the storage tank from being damaged due to overpressure or unstable due to excessive vacuum, thus playing a certain role in promoting safety and environmental protection.

[0003] Traditionally, when calibrating a breather valve, it is necessary to remove the valve from the storage tank, then install it on a calibration bench. The inlet of the breather valve is closed, the outlet is opened, and pressure is slowly increased until it reaches 90% of the positive opening pressure. This pressure is maintained for 5 minutes, and the pressure gauge is observed for a pressure drop. If no pressure drop occurs, pressure is increased to the positive opening pressure and maintained for 1 minute. The sealing between the valve disc and seat is checked to obtain the corresponding positive pressure calibration result. Next, the outlet of the breather valve is closed, the inlet is opened, and a vacuum is slowly drawn from the valve, gradually increasing the vacuum level to 90% of the negative opening pressure. This vacuum is maintained for 5 minutes, and the vacuum gauge is observed for a vacuum drop. If no drop occurs, vacuum is drawn to the negative opening pressure and maintained for 1 minute. The sealing between the valve disc and seat is checked to obtain the corresponding negative pressure calibration result.

[0004] However, disassembling and testing not only adversely affects the sealing performance of the breather valve, reducing its sealing performance, but also necessitates stopping the normal operation of the storage tank, thereby causing production interruption and resulting in direct economic losses for the user. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, the breathing valve calibration fixture is not convenient to carry and requires the breathing valve to be disassembled from the storage tank for calibration, thereby reducing production efficiency. Therefore, a breathing valve calibration fixture is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A breathing valve calibration fixture includes a carrying case and a liner fixedly installed inside the carrying case. It also includes a nitrogen cylinder mounted on the liner, wherein a pressure reducing valve is fixedly connected to the outlet of the nitrogen cylinder, a flexible tube is fixedly connected to the end of the pressure reducing valve away from the nitrogen cylinder, a shut-off valve is fixedly connected to the end of the flexible tube away from the pressure reducing valve, and a test pressure blind plate is fixedly connected to the end of the shut-off valve away from the flexible tube; a vacuum pump is mounted on the liner, and a digital pressure gauge is installed on the liner.

[0008] To protect the nitrogen cylinder, preferably, a vibration isolation pad is fixedly installed on the inner liner. The vibration isolation pad is arc-shaped, and the inner arc surface of the vibration isolation pad is in contact with the nitrogen cylinder.

[0009] To facilitate the securing of the nitrogen cylinder, preferably, an elastic band is fixedly connected to the inner liner, and the elastic band is sleeved on the nitrogen cylinder.

[0010] To facilitate the storage of the hose, preferably, a winding roller is fixedly connected inside the liner, and the hose is wound around the winding roller.

[0011] To improve the protective performance of the suitcase, preferably, corner protectors are fixedly connected to all four corners of the suitcase, and the corner protectors are made of rubber.

[0012] To facilitate the storage of vacuum pumps, nitrogen cylinders, etc., preferably, the inner lining is provided with a molding groove.

[0013] Compared with the prior art, the present invention provides a breather valve calibration fixture, which has the following beneficial effects:

[0014] 1. This breathing valve calibration fixture, through its arc-shaped shock-absorbing pad, can protect the nitrogen cylinder from damage caused by impacts during transport.

[0015] 2. This breather valve calibration fixture, through the setting of the winding roller, can wind and store the hose, improving the practicality of the hose for carrying.

[0016] All parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model, by installing nitrogen cylinders and shut-off valves in a carrying case, makes it easy for staff to carry and allows staff to calibrate the breathing valve on-site. Secondly, by opening the nitrogen cylinder, the positive pressure of the breathing valve can be calibrated. By removing the hose near the pressure reducing valve and connecting it to the air inlet of the air pump, the negative pressure of the breathing valve can be calibrated. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of the structure of a breather valve calibration fixture proposed in this utility model;

[0018] Figure 2This is a schematic diagram showing the disassembled inner lining structure of a breather valve calibration fixture proposed in this utility model.

[0019] Figure 3 This is a partial isometric view of a breather valve calibration fixture proposed in this utility model;

[0020] Figure 4 This is an isometric schematic diagram of the vibration isolation pad structure of a breather valve calibration fixture proposed in this utility model.

[0021] In the diagram: 1. Suitcase; 2. Lining; 3. Nitrogen cylinder; 4. Pressure reducing valve; 5. Hoses; 6. Shut-off valve; 7. Test pressure blind flange; 8. Vacuum pump; 9. Digital pressure gauge; 10. Vibration isolation pad; 11. Elastic band; 12. Winding roller; 13. Corner protector. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example:

[0025] Reference Figures 1-4 A breathing valve calibration fixture includes a carrying case 1 and an inner liner 2 fixedly installed inside the carrying case 1. The inner liner 2 has a molding groove and is made of pearl cotton. The molding groove design can limit the movement of nitrogen cylinder 3 and pressure reducing valve 4, improving the safety of carrying. It also includes: a nitrogen cylinder 3 installed on the inner liner 2, with an elastic band 11 fixedly connected to the inner liner 2. The elastic band 11 is sleeved on the nitrogen cylinder 3. The outlet end of the nitrogen cylinder 3 is fixedly connected to the pressure reducing valve 4. The end of the pressure reducing valve 4 away from the nitrogen cylinder 3 is fixedly connected to the hose 5. The end of the hose 5 away from the pressure reducing valve 4 is fixedly connected to the shut-off valve 6. The end of the shut-off valve 6 away from the hose 5 is fixedly connected to the test pressure blind plate 7; a vacuum pump 8 installed on the inner liner 2; and a digital pressure gauge 9 installed on the inner liner 2.

[0026] Specifically, by installing nitrogen cylinder 3 and shut-off valve 6 inside carrying case 1, it is easy for staff to carry and allows staff to calibrate the breathing valve on site. Secondly, by opening nitrogen cylinder 3, the positive pressure of the breathing valve can be calibrated. By removing the hose 5 near the pressure reducing valve 4 and connecting it to the air inlet of the air pump 8, the negative pressure of the breathing valve can be calibrated.

[0027] A vibration isolation pad 10 is fixedly installed on the inner liner 2. The vibration isolation pad 10 is arc-shaped, and the inner arc surface of the vibration isolation pad 10 is in contact with the nitrogen cylinder 3.

[0028] Specifically, the arc-shaped shock-absorbing pad 10 can protect the nitrogen cylinder 3 and prevent it from being damaged by bumps during transport.

[0029] A winding roller 12 is fixedly connected inside the liner 2, and a hose 5 is wound around the winding roller 12.

[0030] Specifically, the winding roller 12 can be used to wind and store the hose 5, improving the practicality of carrying the hose 5.

[0031] The four corners of the suitcase 1 are fixedly connected with corner protectors 13, which are made of rubber.

[0032] Specifically, the rubber corner protectors 13 can protect the four corners of the suitcase 1, preventing it from being bumped and damaged during carrying.

[0033] Working principle: When calibrating the breathing valve, the operator opens the nitrogen cylinder 3 switch. The first-level pressure gauge displays the remaining nitrogen pressure in the nitrogen cylinder 3. The pressure reducing valve 4 switch is rotated counterclockwise, and the second-level pressure gauge displays the calibration gas pressure. The shut-off valve 6 is opened, and the digital pressure gauge 9 displays the current calibration pressure. The pressure is adjusted according to the working pressure on the breathing valve nameplate to obtain the corresponding positive pressure calibration result. The hose 5 near the pressure reducing valve 4 is removed and connected to the air inlet of the air pump 8. The air pump 8 switch is pressed, and the digital pressure gauge 9 displays the current calibration pressure. The pressure is adjusted according to the working pressure on the breathing valve nameplate to obtain the corresponding negative pressure calibration result.

[0034] After the test is completed, the air pump 8 and other equipment are placed in the liner 2 and the carrying case 1 is closed. The calibration fixture can then be carried and used. It is convenient, accurate, and suitable for the calibration of equipment with breather valves, such as crude oil storage tanks.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A breathing valve calibration fixture, comprising a carrying case (1) and an inner liner (2) fixedly installed inside the carrying case (1), characterized in that, Also includes: A nitrogen cylinder (3) is installed on the liner (2). The outlet of the nitrogen cylinder (3) is fixedly connected to a pressure reducing valve (4), the end of the pressure reducing valve (4) away from the nitrogen cylinder (3) is fixedly connected to a hose (5), the end of the hose (5) away from the pressure reducing valve (4) is fixedly connected to a shut-off valve (6), and the end of the shut-off valve (6) away from the hose (5) is fixedly connected to a pressure testing blind plate (7). An air pump (8) is installed on the liner (2), and a digital pressure gauge (9) is installed on the liner (2).

2. The breathing valve calibration fixture according to claim 1, characterized in that, A vibration isolation pad (10) is fixedly installed on the liner (2). The vibration isolation pad (10) is arc-shaped, and the inner arc surface of the vibration isolation pad (10) is in contact with the nitrogen cylinder (3).

3. The breathing valve calibration fixture according to claim 1, characterized in that, An elastic band (11) is fixedly connected to the liner (2), and the elastic band (11) is sleeved on the nitrogen cylinder (3).

4. The breather valve calibration fixture according to claim 1, characterized in that, A winding roller (12) is fixedly connected inside the liner (2), and the hose (5) is wound around the winding roller (12).

5. The breather valve calibration fixture according to claim 1, characterized in that, The four corners of the suitcase (1) are fixedly connected with corner protectors (13), and the corner protectors (13) are made of rubber.

6. The breather valve calibration fixture according to claim 1, characterized in that, The inner lining (2) has a forming groove.

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