Mobile PV valve detection device

Abstract

The utility model provides a mobile PV valve detection device, which comprises a box body, two sides of the box body are respectively provided with an air source inlet and a test interface connected with a PV valve, the air source inlet is connected with a pressure regulating valve, an outlet of the pressure regulating valve is provided with a positive pressure branch and a negative pressure branch which are respectively connected with the test interface, and the positive pressure branch and the negative pressure branch are respectively connected with the test interface. A downstream pressure gauge is arranged at an outlet of the pressure regulating valve, a positive pressure valve is installed on the positive pressure branch, and a vacuum generator and a negative pressure valve are installed on the negative pressure branch. According to the utility model, the exhalation opening pressure of the PV valve is detected through the positive pressure input by the air source, and the suction opening pressure of the PV valve is detected through the negative pressure obtained by the vacuum generator, so that the suction and exhalation pressure values of the PV valve are detected, the traditional inspection mode of fuel cabin cleaning before the PV valve is detected and removed is effectively replaced, and the detection efficiency is improved. Additional cost and detection time are reduced, detection efficiency of the PV valve is greatly improved, and field maintenance and detection of the PV valve are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to PV valve detection technical field, especially a mobile PV valve detection device. BACKGROUND

[0002] PV valve is full name pressure vacuum valve, also called P / V valve, breather valve, mechanical breathing valve, it is a kind of valve that can adjust the pressure difference between inside and outside of oil tank, and make the gas inside and outside of oil tank communicate.

[0003] With the formal collection of carbon tax in Europe, various shipping companies have promoted the refitting of existing running ships with new energy methanol fuel power ships and the construction of new methanol fuel power ships.According to the chemical ship classification society specification and the 6.3.4th article of the International Maritime Organization IMO Maritime Safety Committee "Safety Guidelines for Ships Using Methanol / Ethanol as Fuel": each fuel tank should be installed with a pressure vacuum valve to limit the pressure and vacuum value of the fuel tank.

[0004] PV valve is widely used as a device that meets the function of being installed in methanol fuel tank as the last protective measure for the safety of methanol fuel tank pressure.

[0005] The function of PV valve is to open and close at the set tank pressure, adjust the pressure and vacuum of fuel tank, so its main performance index is to ensure that PV valve opens and closes at the set tank pressure value, and prevents accidental opening, so the classification society stipulates that the set tank pressure value of PV valve action should be inspected at least once a year (annual inspection), and the pressure / vacuum value is checked, and it is clearly stipulated that the PV valve must be removed to the workshop for comprehensive inspection and pressure check when the ship special inspection period (5 years) expires.

[0006] Currently, when the PV valve used in the ship (chemical tanker and product oil tanker) is checked, it needs to be removed to the workshop for comprehensive inspection and pressure check, and the liquid cargo tank needs to be cleaned before the PV valve is removed. However, as a methanol fuel power ship, methanol is not used as liquid cargo but as fuel, considering the factor of saving operating cost, if there is no repair project for fuel tank, generally no cleaning of fuel tank is arranged, which makes it impossible to check and check the PV valve according to the requirements of the classification society, and if the requirements of the classification society are met, the ship owner needs to bear high additional cleaning cost of fuel tank, and the efficiency of PV valve check is greatly reduced. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a mobile PV valve detection device to solve the above technical problems.

[0008] The utility model provides a mobile PV valve detection device, including the box, the box both sides are provided with the gas source import and the test interface of PV valve connection, the gas source import is connected with pressure regulating valve, the outlet of pressure regulating valve is provided with positive pressure branch pipe and negative pressure branch pipe respectively with test interface connection, the valve rear pressure gage is provided at the outlet of pressure regulating valve, the positive pressure valve is installed on positive pressure branch pipe, vacuum generator and negative pressure valve are installed on negative pressure branch pipe.

[0009] Further, the gas source inlet is connected to a compressed gas source.

[0010] Further, the inlet of the pressure regulating valve is provided with a valve front pressure gauge.

[0011] Further, the outlet of the positive pressure valve is connected to the test interface.

[0012] Further, the outlet of the negative pressure valve is connected to the test interface.

[0013] Further, the inlet of the negative pressure valve is connected to the vacuum port of the vacuum generator.

[0014] Further, a vacuum test switch is installed on the negative pressure branch pipe, and the vacuum test switch is arranged between the pressure regulating valve and the vacuum generator.

[0015] Further, the outlet of the vacuum test switch is connected to the air inlet of the vacuum generator.

[0016] Further, a flow-through opening is formed in the side wall of the box.

[0017] Further, the dials of the valve front pressure gauge and the valve rear pressure gauge are arranged on the box panel.

[0018] The utility model discloses a kind of mobile PV valve detection devices, including box, the box both sides are provided with the gas source import and the test interface of PV valve connection, the gas source import is connected with pressure regulating valve, the outlet of pressure regulating valve is provided with positive pressure branch pipe and negative pressure branch pipe respectively with test interface connection, the valve rear pressure gage is provided at the outlet of pressure regulating valve, the positive pressure valve is installed on positive pressure branch pipe, vacuum generator and negative pressure valve are installed on negative pressure branch pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a front view of the utility model;

[0021] Figure 2 is a left view of the utility model;

[0022] Figure 3 is a right view of the utility model;

[0023] Figure 4 is a rear view of the internal structure of the utility model;

[0024] Explanation of reference signs:

[0025] In the drawing: 1 - box, 2 - gas inlet, 3 - test interface, 4 - pressure regulating valve, 5 - pressure gauge before valve, 6 - pressure gauge after valve, 7 - positive pressure branch, 8 - positive pressure valve, 9 - negative pressure branch, 10 - vacuum test switch, 11 - vacuum generator, 12 - negative pressure valve, 13 - flow-through port; Specific implementation

[0026] The technical scheme of the utility model will be described below in conjunction with embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relationship shown based on the drawing, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more than two, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Embodiment 1

[0030] As Figures 1-4 shown:

[0031] A mobile PV valve detection device, comprising a box body 1, the two side walls of the box body 1 are respectively provided with a gas source inlet 2 connected with a compressed gas source and a test interface 3 connected with a PV valve, and a flow port 13 is formed in the side wall of the box body 1.

[0032] A pressure regulating valve 4, a pre-valve pressure gauge 5, a post-valve pressure gauge 6, a positive pressure valve 8, a vacuum test switch 10, a vacuum generator 11 and a negative pressure valve 12 are installed on the box body 1.

[0033] The dials of the pre-valve pressure gauge 5 and the post-valve pressure gauge 6 are arranged on the front side panel of the box body 1.

[0034] The adjusting knobs of the pressure regulating valve 4, the positive pressure valve 8 and the negative pressure valve 12 are arranged on the front side panel of the box body 1.

[0035] The button of the vacuum test switch 10 is arranged on the front side panel of the box body 1.

[0036] The gas source inlet 2 is connected with the pressure regulating valve 4 through a gas inlet pipeline, the pre-valve pressure gauge 5 is arranged at the inlet of the pressure regulating valve 4, and the post-valve pressure gauge 6 is arranged at the outlet of the pressure regulating valve 4.

[0037] The pre-valve pressure gauge 5 displays the gas pressure in the gas inlet pipeline, and the post-valve pressure gauge 6 displays the gas pressure regulated by the pressure regulating valve 4.

[0038] The outlet of the pressure regulating valve 4 is provided with a positive pressure branch 7 and a negative pressure branch 9 which are respectively connected with the test interface 3.

[0039] The positive pressure valve 8 is installed on the positive pressure branch 7, the inlet of the positive pressure valve 8 is connected with the outlet of the pressure regulating valve 4, and the outlet of the positive pressure valve 8 is connected with the test interface 3.

[0040] The vacuum test switch 10, the vacuum generator 11 and the negative pressure valve 12 are installed on the negative pressure branch 9, the inlet of the vacuum test switch 10 is connected with the outlet of the pressure regulating valve 4, the outlet of the vacuum test switch 10 is connected with the air inlet of the vacuum generator 11, the inlet of the negative pressure valve 12 is connected with the vacuum port of the vacuum generator 11, and the outlet of the negative pressure valve 12 is connected with the test interface 3.

[0041] The detection of the device includes the following steps:

[0042] 1. Confirm whether the pressure regulating valve 4, the positive pressure valve 8, the vacuum test switch 10 and the negative pressure valve 12 on the front panel of the box body 1 are closed, the pressure regulating valve 4 is adjusted to a free rotating state and is considered to be closed, the gas source inlet 2 is connected with the compressed nitrogen or other compressed air on site, and the test interface 3 is connected with the gas tank of the PV valve.

[0043] 2. Exhalation (positive pressure) pressure test

[0044] The compressed air source is turned on, the pre-valve pressure gauge 5 is observed to reach the required gas source pressure value, the pressure regulating valve 4 is adjusted to observe the post-valve pressure gauge 6 to make the pressure reach the test working pressure value, the positive pressure valve 8 is slowly opened, the compressed gas enters the positive pressure branch 7, and is slowly rotated to hear the exhalation working sound of the measured PV valve, indicating that the PV valve reaches the opening pressure, the rotation of the pressure regulating valve 4 is stopped, and it is confirmed that the value is within the set value range of the opening pressure.

[0045] The pressure regulating valve 4 is slowly rotated, so that the pressure in the positive pressure branch 7 and the PV valve reaches 90% of the opening pressure, at this time the PV valve is in a closed state.

[0046] The pressure and the ambient temperature are recorded, and the PV valve angle is adjusted to 0°, 90° and 180° according to the standard requirements respectively. Three values are recorded for each angle adjustment, and finally nine values are obtained, and the average of the nine values is the positive pressure value of the PV valve.

[0047] The gas tank test outlet of the PV valve can also be connected with a portable water column gauge to observe the opening and closing pressure values of the positive pressure test of the PV valve.

[0048] 3. Inhalation (negative pressure) pressure test

[0049] The compressed air source is kept on to ensure normal supply of compressed gas, the valve is opened according to the angle in the exhalation (positive pressure) pressure test, and does not need to be adjusted again, and the positive pressure valve 8 is closed.

[0050] The vacuum test switch 10 is opened, the compressed gas enters the negative pressure branch 9, and the vacuum generator 11 starts to work. Then the negative pressure valve 12 is slowly opened, and is rotated to hear the weak exhalation working sound of the measured PV valve; and it is confirmed that the value is within the set value range of the opening pressure.

[0051] Record the pressure and ambient temperature, and adjust the PV valve angle to 0°, 90° and 180° according to the standard requirements. Record three values for each angle adjustment, and obtain the average value of the nine values as the negative pressure value of the test.

[0052] 4. Test completion

[0053] Compare the above positive pressure value and negative pressure value data with the setting data provided by the PV valve manufacturer, and the difference should be within the allowable range.

[0054] After the PV valve pressure test is completed, close the regulating valve, vacuum test switch 10, positive pressure valve 8 and negative pressure valve 12 on the front panel of the box 1. Release the system pipeline pressure, disconnect the test interface 3 from the PV valve, and the detection is completed.

[0055] The utility model discloses a gas source input does positive pressure pressure to detect the exhalation opening pressure of PV valve, and the negative pressure pressure is obtained through vacuum generator to detect the inhalation opening pressure of PV valve, thereby the pressure value of the inhalation and exhalation of PV valve is detected, effectively replaces the traditional inspection mode of PV valve detection before removing the fuel tank cleaning, reduces the additional cost and detection time, greatly improves the detection efficiency of PV valve, and conveniently maintains and detects the PV valve on site.

[0056] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them. Although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A mobile PV valve testing apparatus, characterized by The utility model relates to a kind of test box, including box, gas source inlet and test interface connected with PV valve are respectively arranged in the two sides of the box, the gas source inlet is connected with pressure regulating valve, the outlet of the pressure regulating valve is provided with respectively with the test interface connection positive pressure branch and negative pressure branch, the outlet of the pressure regulating valve is provided with valve rear pressure gauge, positive pressure valve is installed on the positive pressure branch, vacuum generator and negative pressure valve are installed on the negative pressure branch.

2. The mobile PV valve inspection apparatus of claim 1, wherein, The gas source inlet is connected to a compressed gas source.

3. The mobile PV valve inspection apparatus of claim 1, wherein, The inlet of the pressure regulating valve is provided with a pre-valve pressure gauge.

4. The mobile PV valve inspection apparatus of claim 1, wherein, The outlet of the positive pressure valve is connected to the test interface.

5. The mobile PV valve inspection apparatus of claim 1, wherein, The outlet of the negative pressure valve is connected to the test interface.

6. The mobile PV valve inspection apparatus of claim 1, wherein, The inlet of the negative pressure valve is connected to the vacuum port of the vacuum generator.

7. The mobile PV valve inspection apparatus of claim 1, wherein, A vacuum test switch is installed on the negative pressure branch, and the vacuum test switch is arranged between the pressure regulating valve and the vacuum generator.

8. The mobile PV valve inspection apparatus of claim 7, wherein, The outlet of the vacuum test switch is connected to the air inlet of the vacuum generator.

9. The mobile PV valve inspection apparatus of claim 1, wherein, A flow-through opening is formed in the side wall of the box.

10. The mobile PV valve inspection apparatus of claim 3, wherein, The dials of the pre-valve pressure gauge and the post-valve pressure gauge are arranged on the front side panel of the box.

Images