CN213036051U

CN213036051U - Chemical ship cargo hold PV valve pressure test device

Info

Publication number: CN213036051U
Application number: CN202021164823.5U
Authority: CN
Inventors: 颜廷乐; 陈愉庆; 陆文俊; 张立威; 孙凯; 施健; 郑志敏; 张航
Original assignee: Hudong Zhonghua Shipbuilding Group Co Ltd
Current assignee: Hudong Zhonghua Shipbuilding Group Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-04-23
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a chemicals ship cargo hold PV valve pressure test device, including base, setting in the base top and through the PV valve that fastener and base are fixed mutually and through the pressure vacuum apparatus that intake hose and bleed hose are connected with the base, pressure vacuum apparatus links to each other with the air supply, be provided with seal gasket between base and the PV valve, the valve pocket and the intake hose and the bleed hose of PV valve are linked together. The utility model discloses simple structure, use convenient operation link together pressure vacuum apparatus and PV valve and base through adopting the hose, the take-off pressure of test PV valve that can be quick, convenient.

Description

Chemical ship cargo hold PV valve pressure test device

Technical Field

The utility model relates to a shipbuilding technical field especially relates to a chemicals ship cargo hold PV valve pressure test device.

Background

In order to safely carry out loading and unloading operations and normal navigation and ensure that the cargo tank structure is not damaged and exploded, a venting system is provided in each cargo tank to limit the pressure or vacuum in the cargo tank. When the ship is underway and parked, the steam Pressure in the cargo hold changes along with the change of the outside temperature and the change of the temperature of goods in the cargo hold, so that the volume expands or contracts, the PV valve is needed to be utilized, and when the Pressure of the cargo hold is overhigh, the PV valve discharges redundant steam to reduce the Pressure of the cargo hold; when the pressure is too low, the PV valve sucks in air, raising the cabin pressure. The take-off pressure of the PV valve is determined according to the design pressure of a cargo compartment structure, at the moment, the accurate take-off of the PV valve is a key factor for guaranteeing the safety of the cargo compartment, a manufacturer often performs a pressure test before leaving a factory and provides a related test report, but before installing the PV valve on a ship, the shipowner often requires the shipyard to perform a test again when checking the ship so as to guarantee absolute safety.

The conventional pressure test has the following defects:

1. the pressure testing device is complex and large in occupied space, a pressure buffer tank needs to be prepared, and a pressure gauge and a PV valve are arranged on the pressure buffer tank and connected with a hand pump through a pipeline.

2. Traditional pressure test device pressure unstable when the test, though be provided with the baffle-box, pressure still fluctuates greatly during the test, hardly accurate test take-off pressure.

3. The traditional pressure testing device is suitable for the single type of the PV valve, each type of PV valve needs to be prepared separately to be connected with a tool joint and a box body matched with the PV valve, and the PV valve needs to be continuously disassembled, assembled and replaced.

4. The hand pump ensures the pressure supply of the system, and needs continuous pressurization, thereby increasing the workload of the test.

Disclosure of Invention

In view of this, the utility model provides a chemicals ship cargo hold PV valve pressure test device can reduce the site operation degree of difficulty, the safe operation and the use of assurance system at the take-off pressure of the quick accurate test PV valve on the ship.

The utility model provides a chemical boat cargo hold PV valve pressure test device, includes the base, sets up in the base top and through the PV valve that fastener and base are fixed mutually and the pressure vacuum apparatus that is connected with the base through air intake hose and air exhaust hose, pressure vacuum apparatus links to each other with the air supply, be provided with seal gasket between base and the PV valve, the valve pocket and the air intake hose of PV valve and air exhaust hose are linked together.

Preferably, the base comprises a bottom plate and supporting legs fixed at the bottom of the bottom plate, and the bottom plate is provided with a fixing hole for fixing the PV valve, an air inlet connected with an air inlet hose and an air outlet connected with an air exhaust hose.

Preferably, the fixing hole is a kidney-shaped hole.

Preferably, the fastening piece comprises a pressing plate, a fastening nut and a fastening bolt, the pressing plate is arranged on the PV valve, and the fastening bolt sequentially penetrates through a flange hole of the PV valve and a fixing hole of the base and is locked and fixed through the fastening nut pressing the pressing plate.

Preferably, the fastening nut is a wing nut.

Preferably, the air source is 7bar compressed air commonly used on ships.

The utility model has the advantages that:

the utility model discloses simple structure, use convenient operation link together pressure vacuum apparatus and PV valve and base through adopting the hose, the take-off pressure of test PV valve that can be quick, convenient. Just the utility model is suitable for a PV valve of different models, the commonality is strong, work load when the on-the-spot test that can significantly reduce.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a plan view of the present invention.

Fig. 3 is a schematic structural diagram of the base of the present invention.

The reference numerals in the figures have the meaning:

the device comprises a base 1, a sealing gasket 2, a PV valve 3, a pressure plate 4, a fastening bolt 5, an air inlet hose 6, an air exhaust hose 7, a pressure vacuum device 8, an air source 9, a bottom plate 10, supporting legs 11, fixing holes 12, an air inlet 13, an air outlet 14 and a fastening nut 15.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be clear that the described embodiments are only some, but not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

The utility model provides a chemicals ship cargo hold PV valve pressure test device, including base 1, set up in base 1 top and through fastener and base 1 fixed PV valve 3 mutually and through the pressure vacuum apparatus 8 that intake hose 6 and air exhaust hose 7 are connected with base 1, pressure vacuum apparatus 8 links to each other with air supply 9.

And a sealing gasket 2 is arranged between the base 1 and the PV valve 3. The base 1 includes a bottom plate 10 and legs 11 fixed to the bottom of the bottom plate 10. The base plate 10 is provided with a fixing hole 12 for fixing the PV valve 3, an air inlet 13 connected with the air inlet hose 6 and an air outlet 14 connected with the air exhaust hose 7, and the air inlet hose 6 and the air exhaust hose 7 are both communicated with a valve cavity of the PV valve 3.

The PV valve 3 is fixed to the base 1 by fasteners. The fastening member includes a pressing plate 4, a fastening nut 15, and a fastening bolt 5. The pressing plate 4 is arranged on the PV valve 3, and the fastening bolt 5 sequentially penetrates through a flange hole of the PV valve 3 and a fixing hole 12 of the base 1 and is locked and fixed through a fastening nut 15 pressing the pressing plate 4.

In this embodiment, the mounting holes 12 in the base plate 10 are arranged as slots, so that the position of the pressure plate 4 can be adjusted to suit different types of PV valves. The fastening nut 15 is a wing nut.

During the use, will the utility model discloses a test device links to each other with the air supply that has the general 7bar compressed air on the ship. Then, the pressure vacuum device 8 is activated, the PV valve 3 is charged through the intake hose 6, the positive pressure is maintained in the PV valve 3, and when the PV valve 3 jumps, the first jump-up pressure indicated on the pressure vacuum device 8 is recorded. Then, the air intake hose 6 is closed, air is drawn through the air suction hose 7 to maintain a negative pressure in the PV valve 3, and when the PV valve 3 jumps, a second jump-off pressure indicated on the pressure vacuum apparatus 8 is recorded.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The pressure test device for the PV valve of the cargo hold of the chemical carrier is characterized by comprising a base, a PV valve which is arranged above the base and fixed with the base through a fastener, and a pressure vacuum device which is connected with the base through an air inlet hose and an air exhaust hose, wherein the pressure vacuum device is connected with an air source, a sealing gasket is arranged between the base and the PV valve, and a valve cavity of the PV valve is communicated with the air inlet hose and the air exhaust hose.

2. The chemical ship cargo hold PV valve pressure test apparatus of claim 1, wherein the base comprises a bottom plate, legs fixed to the bottom of the bottom plate, the bottom plate having a fixing hole for fixing the PV valve, an air inlet for connecting to an air inlet hose, and an air outlet for connecting to an air exhaust hose.

3. The chemical tanker cargo hold PV valve pressure test apparatus of claim 2, wherein said securing holes are kidney shaped holes.

4. The chemical tanker cargo hold PV valve pressure test device of claim 1, wherein the fasteners comprise a pressure plate, a fastening nut and a fastening bolt, the pressure plate is arranged on the PV valve, and the fastening bolt sequentially penetrates through a flange hole of the PV valve and a fixing hole of the base and is locked and fixed through the fastening nut pressing the pressure plate.

5. The chemical tanker cargo hold PV valve pressure test apparatus of claim 4, wherein said fastening nuts are wing nuts.

6. The chemical tanker cargo hold PV valve pressure test rig of claim 1, wherein said source of gas is 7bar compressed air commonly available onboard.