Testing device for PV valve of marine liquid cargo tank

Abstract

The utility model relates to the technical field of chemical and oil and gas ship building, in particular to a marine liquid cargo tank PV valve testing device, which comprises a base, a connecting piece, a pressure vacuum device and a liquid level display unit, and is characterized in that the base comprises supporting legs and a mounting plate, the supporting legs support the mounting plate, the mounting plate is of a rectangular structure, and a mounting position is arranged on the mounting plate; the installation position is composed of a plurality of kidney-shaped holes arrayed along the circumference, and the extending square of the kidney-shaped holes penetrates through the circle center of the circumference. The connecting piece installs the PV valve to be tested to the installation position; the pressure vacuum device is arranged on one side of the base and is connected with the PV valve to be tested through an air inlet pipe; and the liquid level display unit is arranged on one side of the base and is connected with the PV valve to be detected through a liquid level pipe. By means of the kidney-shaped holes and the connecting pieces, quick disassembly and test installation of PV valves with different drift diameters can be achieved, universality is high, meanwhile, the structure is simple, use and operation are convenient, and quick tests of the PV valves with different drift diameters are effectively achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical, oil and gas ship repair and construction, and particularly relates to a test device for a liquid cargo tank PV valve of a ship. BACKGROUND

[0002] Currently, in the process of chemical, oil and gas ship repair and construction, the PV valve of each liquid cargo tank needs to be repaired, maintained and tested. Each cabin generally has two PV valves, and each PV valve is composed of a pressure valve and a vacuum valve to control the pressure or vacuum degree of the cabin and ensure the safety of the cabin structure.

[0003] The pass diameter of the PV valve of an oil and gas ship is generally from DN50 to DN300, and in order to adapt to the test of PV valves of different pass diameters, the traditional PV valve pressure test platform uses a short connecting pipe with a similar size head as a transition joint. When in use, the short connecting pipe needs to be constantly disassembled and replaced.

[0004] The transition short connecting pipe is not only of many types and heavy, but also is time-consuming and laborious to disassemble and assemble frequently, has low efficiency, consumes materials, occupies a large space and has other defects. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a test device for a liquid cargo tank PV valve of a ship, which is suitable for PV valves of different models and pass diameters, has strong universality, is simple in structure, convenient to use and operate, can quickly and conveniently test the PV valve, greatly reduces the labor intensity of constructors and shortens the repair period.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a test device for a liquid cargo tank PV valve of a ship, which comprises a base, a connecting piece, a pressure vacuum device and a liquid level display unit. The base comprises legs and a mounting plate, the legs support the mounting plate, the mounting plate has a rectangular structure, the mounting plate is provided with mounting positions, the mounting positions are composed of a plurality of waist-shaped holes arranged along a circumference, and the extension square of the waist-shaped hole passes through the center of the circumference. The connecting piece is used to install the PV valve to be tested to the mounting position. The pressure vacuum device is arranged on one side of the base, and the pressure vacuum device is connected to the PV valve to be tested through an air inlet pipe. The liquid level display unit is arranged on one side of the base, and the liquid level display unit is connected to the PV valve to be tested through a liquid level pipe.

[0007] Further, the mounting plate is provided with an air inlet joint hole and a liquid level joint hole, the air inlet pipe is connected to the PV valve to be tested through the air inlet joint hole, and the liquid level pipe is connected to the PV valve to be tested through the liquid level joint hole.

[0008] Further, the waist-shaped hole comprises a proximal end and a distal end, the proximal ends of the plurality of waist-shaped holes are connected to enclose a circular region, and the air inlet joint hole and the liquid level joint hole are located in the circular region.

[0009] Further, the installation plate is provided with a bleed joint hole, and a bleed valve pipe passes through the bleed joint hole and is connected with the PV valve to be tested.

[0010] Further, the bleed joint hole is located in the circular area, and the centers of the air inlet joint hole, the liquid level joint hole and the bleed joint hole form an equilateral triangle.

[0011] Further, the installation plate is provided with a plurality of installation positions along the length direction, each installation position is identical in structure, and the PV valve to be tested on each installation position can be connected with the pressure vacuum device and the liquid level display unit.

[0012] Further, when a plurality of PV valves to be tested are installed on the installation positions, the plurality of PV valves to be tested are in parallel connection.

[0013] Further, the pressure vacuum device comprises a pressure vacuum device and a silencer, the pressure vacuum device provides negative pressure, and the silencer silences.

[0014] Further, the liquid level display unit comprises a U-shaped pipe section, a liquid adding valve, a scale, a flat plate and a fixing support.

[0015] Further, the test device for the marine liquid cargo tank PV valve further comprises a transition washer, and the PV valve to be tested is installed on the installation position through the transition washer.

[0016] The beneficial effects of the utility model lie in:

[0017] 1. The installation plate is provided with installation positions, the installation positions are composed of a plurality of waist-shaped holes arranged along the circumference, the extension square of the waist-shaped hole passes through the center of the circumference, and the connecting piece can pass through the waist-shaped hole to fix the PV valve to be tested on the installation position. In the application, the waist-shaped hole and the connecting piece are arranged, the quick disassembly and test installation of PV valves with different diameters can be realized, the universality is high, the structure is simple, the operation is convenient, and the quick test of PV valves with different diameters is effectively solved.

[0018] 2. The waist-shaped hole comprises a proximal end and a distal end, the proximal ends of the plurality of waist-shaped holes are connected to form a circular area, the air inlet joint hole, the liquid level joint hole and the bleed joint hole are located in the circular area. The centers of the air inlet joint hole, the liquid level joint hole and the bleed joint hole form an equilateral triangle, the structure is compact, the space is fully utilized, and the installation of the air inlet pipe, the liquid level pipe and the bleed valve pipe is facilitated.

[0019] 3. The installation plate is provided with a plurality of installation positions along the length direction, each installation position is identical in structure, the PV valve to be tested on each installation position can be connected with the pressure vacuum device and the liquid level display unit, and the synchronous test of a plurality of PV valves to be tested can be realized. The plurality of PV valves to be tested are in parallel connection, and are independently tested without interference. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art 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.

[0021] Figure 1 A schematic diagram of the overall structure of a test device for a marine liquid cargo tank PV valve provided for an embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the overall structure of the base used in the test device for a marine liquid cargo tank PV valve provided in this embodiment of the utility model;

[0023] Figure 3 A schematic diagram showing the installation position of the transition gasket used in the test device for a marine liquid cargo tank PV valve provided in this embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the overall structure of the transition gasket used in the test device for a marine liquid cargo tank PV valve provided in this embodiment of the utility model;

[0025] Figure 5 A schematic diagram of the overall structure of the pressure vacuum device used in the test apparatus for a marine liquid cargo tank PV valve provided in this embodiment of the utility model;

[0026] Figure 6 A schematic diagram of the overall structure of the liquid level display unit used in the test device for a marine liquid cargo tank PV valve provided in this embodiment of the utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Base; 11. Pad; 12. Support leg; 13. Mounting plate; 14. Mounting position; 141. Oblong hole; 142. Air inlet port; 143. Liquid level port; 144. Drain port; 2. Transition gasket; 21. Circular steel plate; 22. Sealing gasket; 3. Pressure vacuum device; 31. Pressure vacuum device; 32. Silencer; 33. Matching pipeline; 34. Valves; 35. Protective housing; 4. Liquid level display unit; 41. U-shaped pipe section; 42. Liquid filling valve; 43. Scale; 44. Flat plate; 45. Fixing bracket; 5. PV valve to be tested. Detailed Implementation

[0029] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside 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.

[0032] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0033] Reference Figures 1 to 6 As a kind of test device of marine liquid cargo tank PV valve provided in the embodiments of the present application, including base 1, connecting piece, pressure vacuum device 3 and liquid level display unit 4, base 1 includes supporting leg 12 and mounting plate 13, supporting leg 12 supports mounting plate 13, mounting plate 13 is rectangular structure, mounting plate 13 is equipped with installation site 14, installation site 14 is composed of multiple waist-shaped holes 141 along the circumferential array, the extension square of waist-shaped hole 141 passes through the circumferential center;Connecting piece installs the PV valve 5 to be measured to installation site 14;Pressure vacuum device 3 is located at one side of base 1, and pressure vacuum device 3 is connected with the PV valve 5 to be measured through air inlet pipe;Liquid level display unit 4 is located at one side of base 1, and liquid level display unit 4 is connected with the PV valve to be detected through liquid level pipe.

[0034] The mounting plate 13 is provided with a mounting position 14, which is composed of a plurality of waist-shaped holes 141 arranged along the circumference, and the extension of the waist-shaped hole 141 passes through the center of the circumference. The connecting piece can pass through the waist-shaped hole to fix the PV valve 5 to be tested in the mounting position 14. In the present application, by arranging the waist-shaped hole and the connecting piece, the quick disassembly and test installation of PV valves with different diameters can be realized, which has strong universality, simple structure, convenient operation, and effectively solves the problem of quick test of PV valves with different diameters.

[0035] Specifically, the base 1 further includes a pad 11, and the supporting legs 12 are fixed on the pad 11. The connecting part of the supporting leg 12 and the mounting plate 13 is welded with a reinforcing rib. The mounting position 14 is composed of eight waist-shaped holes 141 arranged along the circumference, and the eight waist-shaped holes are uniformly distributed. The distance between the adjacent two waist-shaped holes is reasonably arranged according to the outline of the commonly used PV valve with the largest diameter, so as to provide sufficient operation space during the test of different PV valves. The connecting piece is a bolt, and the waist-shaped hole is a waist-shaped hole. According to the size of the commonly used PV valve with different diameters, the layout design is arranged to meet the fixation of PV valves with different diameters. The mounting plate 13 is provided with an air inlet joint hole 142 and a liquid level joint hole 143. The air inlet pipe passes through the air inlet joint hole 142 and is connected with the PV valve 5 to be tested. The liquid level pipe passes through the liquid level joint hole 143 and is connected with the PV valve to be tested. The mounting plate 13 is provided with a discharge joint hole 144. The discharge valve pipe passes through the discharge joint hole 144 and is connected with the PV valve 5 to be tested. The waist-shaped hole 141 includes a proximal end and a distal end. The proximal ends of the plurality of waist-shaped holes 141 are connected to form a circular region. The air inlet joint hole 142, the liquid level joint hole 143 and the discharge joint hole 144 are located in the circular region. The center lines of the air inlet joint hole 142, the liquid level joint hole 143 and the discharge joint hole 144 form an equilateral triangle. The structure is compact, the space is fully utilized, and the installation of the air inlet pipe, the liquid level pipe and the discharge valve pipe is facilitated.

[0036] Among them, the air inlet pipe, the liquid level pipe and the discharge valve pipe are all located below the mounting plate 13. The air inlet pipe is provided with an on-off valve V4, the liquid level pipe is provided with an on-off valve V5, and the discharge valve pipe is provided with an on-off valve V6. Through the cooperation of the on-off valves V4, V5 and V6, the effective test of the PV valve 5 to be tested can be realized.

[0037] Further, the mounting plate 13 is provided with a plurality of mounting positions 14 along the length direction. Each mounting position 14 has the same structure, and each PV valve 5 to be tested on each mounting position 14 can be connected with the pressure vacuum device 3 and the liquid level display unit 4, so as to realize the synchronous test of a plurality of PV valves 5 to be tested. When a plurality of PV valves 5 to be tested are installed in the plurality of mounting positions 14, the plurality of PV valves 5 to be tested are in parallel relationship and are independently tested without interference.

[0038] Further, the test device for the marine liquid cargo tank PV valve further includes a transition washer 2, and the PV valve to be tested is installed to the mounting position 14 through the transition washer 2.

[0039] Specifically, the transition gasket 2 is composed of a circular ring steel plate 21 and a sealing gasket 22, the upper and lower end faces of the circular ring steel plate 21 are fixed with the sealing gasket 22, and the sealing gasket 22 is fixed by using non-dry adhesive. The transition gasket 2 is made according to the flange sealing surface of the PV valve of different diameter, so as to adapt to the tightness test of the PV valve of different diameter. For the PV valve with diameter DN < 100, the thickness of the transition gasket 2 is not less than 100 mm, and the steel plate or phenolic resin can be used to avoid the obstacles such as the switch handle on the side of the PV valve. For the PV valve with diameter DN ≥ 100, the thickness of the circular ring steel plate 21 is not less than 12 mm, so as to meet the air tightness requirement.

[0040] Further, the pressure vacuum device 3 includes a pressure vacuum device 31, a silencer 32, a matching pipeline 33, a valve 34 and a protective shell 35. The pressure vacuum device 31 provides negative pressure, and the silencer 32 silences. The protective shell 35 is located outside the whole machine and plays a protective role. The matching pipeline 33 plays a role in connecting the gas circuit, which is convenient for providing vacuum negative pressure to carry out the test. The valve 34 is arranged on the matching pipeline 33, and the valve 34 includes a bypass valve V0, an inlet and outlet valve V1 and an inlet and outlet valve V2.

[0041] Further, the liquid level display unit 4 includes a U-shaped pipe section 41, a liquid adding valve 42, a scale 43, a flat plate 44 and a fixed support 45. The U-shaped pipe section 41 is bent from a transparent hose, and the pressurizing valve can pressurize the U-shaped pipe section 41. The scale 43 is fixed on the U-shaped pipe section 41 to measure the height of the page. The U-shaped pipe section 41 is fixed on the flat plate 44, and the flat plate 44 plays a supporting role. The fixed frame plays a role in fixedly installing the whole liquid level display unit 4. In the embodiment, the mounting plate 13 is provided with a plurality of mounting positions 14, and a plurality of PV valves 5 to be tested can be tested, so the liquid level display unit 4 is provided with a plurality of groups, and each group works independently.

[0042] The use process of the marine liquid cargo tank PV valve test device in the embodiment is as follows:

[0043] ①, check whether the whole test device is intact. According to the size of the PV flange sealing surface to be tested, select the appropriate transition gasket 2, and confirm that the sealing gaskets 22 on the upper and lower end faces of the gasket are intact. Check the clean mounting surface of the mounting plate 13, the waist-shaped hole of each group and the sealing surface of the flange of the PV valve 5 to be tested.

[0044] ②, first place the transition gasket 2 on each waist-shaped hole of the mounting plate 13, adjust the center, then hoist each PV valve 5 to be tested to the transition gasket 2, and adjust the waist-shaped hole center. Each PV valve 5 to be tested is respectively symmetrically and diagonally installed with a connecting piece, and the PV valve 5 to be tested and the transition gasket 2 are installed on the mounting position 14 of the mounting plate 13.

[0045] ③, open the switch valve V4 on the corresponding inlet pipe of the tested PV valve, open the switch valve V5 on the liquid level pipe, and close the release valve V6 on the release pipe.

[0046] ④, first test the pressure function of the tested PV valve 5: open the bypass valve V0 of the gas source of the pressure vacuum device 3, confirm and close the inlet valve V1 and the outlet valve V2 of the pressure vacuum pump, directly inject gas into the tested PV valve 5, and check the height of the liquid level water column to ensure that it is within the design pressure range. If the PV valve leaks, rework the sealing part until the sealing meets the requirements. If it opens in advance or overpressure opens, re-adjust the counterweight of the PV valve core to ensure that the opening pressure of the tested PV valve 5 meets the design requirements. After the test is completed, close the bypass valve V0 of the pressure vacuum device 3, open the release valve V6, and ensure that the inner cavity of the tested PV valve 5 is balanced with the atmospheric pressure.

[0047] ⑤, then test the vacuum function of the PV valve: close the release valve V6, close the bypass valve V0 of the gas source of the pressure vacuum device 3, open the inlet valve V1 and the outlet valve V2 of the pressure vacuum pump, use the pressure vacuum device 3 to pump the tested PV valve 5, and check the height of the liquid level water column to ensure that the vacuum degree is within the design range. If the PV valve leaks, rework the sealing part until the sealing meets the requirements. If it opens in advance or overpressure opens, re-adjust the counterweight of the PV valve core to ensure that the opening pressure of the PV valve meets the design requirements.

[0048] ⑥, close the inlet valve V1 and the outlet valve V2 of the pressure vacuum pump, open the release valve V6, and ensure that the inner cavity of the tested PV valve 5 is balanced with the atmospheric pressure.

[0049] Similarly, the test processes of the remaining groups of tested PV valves 5 are the same, so they will not be described again.

[0050] The embodiments of the specific implementation are the preferred embodiments of the utility model, which do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A test device for a PV valve of a liquid cargo tank of a ship, characterized in that, The utility model relates to a PV valve test bench, which comprises a base (1) and a connecting piece. The base (1) comprises a supporting leg (12) and a mounting plate (13), the supporting leg (12) supports the mounting plate (13), the mounting plate (13) has an oblong structure, and the mounting plate (13) is provided with mounting positions (14) formed by a plurality of waist-shaped holes (141) arranged in a circumferential array, and the extension of the waist-shaped holes (141) passes through the circumferential center. The connecting piece is used for mounting a PV valve (5) to be tested to the mounting positions (14). A pressure vacuum device (3) is arranged on one side of the base (1), and the pressure vacuum device (3) is connected to the PV valve (5) to be tested through an air inlet pipe. A liquid level display unit (4) is arranged on one side of the base (1), and the liquid level display unit (4) is connected to the PV valve to be tested through a liquid level pipe.

2. A test device for a PV valve of a liquid cargo tank of a ship according to claim 1, characterized in that The mounting plate (13) is provided with an air inlet connector hole (142) and a liquid level connector hole (143), the air inlet pipe passes through the air inlet connector hole (142) and is connected to the PV valve (5) to be tested, and the liquid level pipe passes through the liquid level connector hole (143) and is connected to the PV valve to be tested.

3. A test arrangement for a PV valve of a liquid cargo tank of a ship according to claim 2, characterized in that The waist-shaped holes (141) comprise proximal ends and distal ends, the proximal ends of the plurality of waist-shaped holes (141) are connected to form a circular region, and the air inlet connector hole (142) and the liquid level connector hole (143) are located in the circular region.

4. A test arrangement for a PV valve of a liquid cargo tank of a ship according to claim 3, characterized in that The mounting plate (13) is provided with a bleed connector hole (144), and a bleed valve pipe passes through the bleed connector hole (144) and is connected to the PV valve (5) to be tested.

5. A test arrangement for a PV valve of a liquid cargo tank of a ship as claimed in claim 4, characterized in that The bleed connector hole (144) is located in the circular region, and the centers of the air inlet connector hole (142), the liquid level connector hole (143), and the bleed connector hole (144) form an equilateral triangle.

6. The testing device for a PV valve of a liquid cargo tank of a ship according to claim 1, characterized in that, The mounting plate (13) is provided with a plurality of mounting positions (14) along the length direction, each mounting position (14) has the same structure, and the PV valve (5) to be tested on each mounting position (14) can be connected to the pressure vacuum device (3) and the liquid level display unit (4).

7. A test arrangement for a PV valve of a liquid cargo tank of a ship according to claim 6, characterized in that When a plurality of PV valves (5) to be tested are mounted on the plurality of mounting positions (14), the plurality of PV valves (5) to be tested are in a parallel relationship.

8. The testing device for a PV valve of a liquid cargo tank of a ship according to claim 1, characterized in that, The pressure vacuum device (3) comprises a pressure vacuum device (31) and a silencer (32), the pressure vacuum device (31) provides negative pressure, and the silencer (32) silences.

9. The testing device for a PV valve of a liquid cargo tank of a ship according to claim 1, characterized in that, The liquid level display unit (4) comprises a U-shaped pipe section (41), a liquid adding valve (42), a scale (43), a flat plate (44), and a fixing support (45).

10. The testing device for a PV valve of a liquid cargo tank of a ship according to claim 1, characterized in that, The utility model further comprises a transition gasket (2), and the PV valve to be tested is mounted to the mounting position (14) through the transition gasket (2).

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