CN217846016U - Vapor phase inhibitor monitoring device for heat-insulating pipeline - Google Patents

Abstract

The utility model belongs to the technical field of pipeline corrosion prevention, and provides a vapor phase corrosion inhibitor monitoring device for a heat preservation pipeline, wherein the heat preservation pipeline comprises a conveying pipe for conveying liquid, a protection cylinder sleeved on the conveying pipe, and a heat preservation layer arranged between the conveying pipe and the protection cylinder; the gas phase corrosion inhibitor monitoring device comprises a reaction container, a first pipeline and a second pipeline, wherein the reaction container is provided with an inner container and is used for storing a corrosion inhibitor, the first pipeline is used for conveying nitrogen to the inner container, the second pipeline is used for communicating the inner container and the heat-insulating layer, and the second pipeline conveys the atomized corrosion inhibitor in the reaction container to the heat-insulating layer; and a monitoring sensor for monitoring the corrosion inhibitor is arranged on the heat-insulating layer. The utility model provides a vapor phase inhibitor monitoring devices, simple structure can effectively reduce personnel's scene and patrol and examine, confirms to add the medicine cycle, improves the availability factor of inhibitor, promotes insulating pipeline's reliability.

Description

Vapor phase inhibitor monitoring device for heat-insulating pipeline

Technical Field

The utility model belongs to the technical field of the pipeline is anticorrosive, more specifically say, relate to a vapor phase inhibitor monitoring devices for insulating pipeline.

Background

The gas phase corrosion inhibitor is also called as volatile corrosion inhibitor or gas phase antirust agent, can automatically volatilize components with corrosion inhibition effect at normal temperature, is diffused and dissolved into thin electrolyte on the surface of metal and is adsorbed on the surface of the metal, thereby inhibiting the corrosion of the metal. When the vapor phase corrosion inhibitor is used, the surface, the groove, the gap and other parts of a metal product can be well protected under the condition of not directly contacting the metal surface, and the vapor phase corrosion inhibitor has the characteristics of good corrosion prevention effect, simple and convenient operation, lower cost and the like, thereby being particularly suitable for the non-coating protection of metal products and components with complex structures. At present, the vapor phase corrosion inhibitor is widely applied to the rust prevention treatment of metal materials, products, industrial equipment, instruments and the like.

The chilled water conveying pipeline of the nuclear power station is put into operation for many years, and with the increase of the operation years, the heat-insulating pipeline in the chilled water conveying pipeline is damaged to a certain extent, so that water vapor condensation in the pipeline, pipeline coating damage, pipeline corrosion and the like occur, and the safety production of the nuclear power station is influenced; in order to inhibit the corrosion under the heat-insulating layer of the heat-insulating pipeline, a vapor phase corrosion inhibitor can be added into the heat-insulating layer; the vapor phase corrosion inhibitor is influenced by the corrosion inhibition release time and the steam pressure, and the corrosion inhibition effect of the vapor phase corrosion inhibitor needs to be monitored and evaluated in real time in order to ensure the corrosion prevention effect of the heat preservation pipeline. In the prior art, application No.: CN201710179618.2 provides a monitoring device for performance of a corrosion inhibitor film, which is used for slow release effect and evaluation of a liquid corrosion inhibitor on the inner wall of a petrochemical transportation pipeline, so as to monitor performance of the corrosion inhibitor film, further predict the service life of the corrosion inhibitor film at each monitoring part, and mainly solve the problem that the monitoring position of the existing monitoring mode of the liquid corrosion inhibitor film has limitation; however, the device cannot be used for monitoring the corrosion inhibition effect of the vapor phase corrosion inhibitor. Application No.: CN201611224267.4 provides a system for evaluating corrosion inhibition efficiency of a corrosion inhibitor, which is used in the field of petrochemical gas production engineering layers, for simulating corrosion conditions of high-temperature and high-pressure corrosion environment and high-gas erosion, and dynamically evaluating slow release performance of a liquid corrosion inhibitor; the system for evaluating the corrosion inhibition efficiency of the corrosion inhibitor has a complex structure and is fussy to control, and cannot be used for evaluating the solid-state vapor phase corrosion inhibitor. Application No.: CN201410373349.X provides a device and a method for evaluating a gas phase corrosion inhibitor, which are used for evaluating the corrosion inhibitor of a corrosion environment of an oil refinery, the device is provided with a reaction kettle, a water bath, a corrosion test piece rack, a hydrogen sulfide gas cylinder, a carbon dioxide gas cylinder, a nitrogen gas cylinder, a buffer tank, a tail gas absorption tank and the like, the structure is relatively complex, a static hanging piece structure is adopted for corrosion inhibitor evaluation, the slow release effect evaluation time is long, and the device and the method are suitable for laboratory slow release rating work of a gas environment containing hydrogen sulfide and carbon dioxide. Application No.: CN201910040205.5 provides an integrated corrosion inhibitor evaluation device and a using method thereof, which are used for laboratory evaluation of liquid slow release, have complex structures and mechanisms, and cannot be used for field monitoring and evaluation and other works. In summary, the monitoring device of the vapor phase corrosion inhibitor in the prior art has a complex structure, has a long evaluation time on the corrosion inhibition effect, is limited by objective conditions such as technology and application scenes, and cannot timely and effectively monitor and evaluate the corrosion inhibition effect of the vapor phase corrosion inhibitor in real time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vapor phase inhibitor monitoring devices for insulating pipeline to there is the structure complicacy in the vapor phase inhibitor monitoring devices who exists among the solution prior art, long to inhibition effect evaluation time, receives objective condition restrictions such as technique and application scene, can't in time carry out the technical problem of real-time supervision and evaluation to vapor phase inhibitor's inhibition effect effectively.

In order to achieve the above object, the utility model adopts the following technical scheme: the monitoring device for the vapor phase corrosion inhibitor for the heat-insulating pipeline is provided, wherein the heat-insulating pipeline comprises a conveying pipe for conveying liquid, a protection cylinder sleeved on the conveying pipe, and a heat-insulating layer arranged between the conveying pipe and the protection cylinder; the gas phase corrosion inhibitor monitoring device comprises a reaction container, a first pipeline and a second pipeline, wherein the reaction container is provided with an inner container and is used for storing a corrosion inhibitor, the first pipeline is used for conveying nitrogen to the inner container, the second pipeline is used for communicating the inner container and the heat-insulating layer, and the second pipeline conveys the corrosion inhibitor which is atomized in the reaction container to the heat-insulating layer; and a monitoring sensor for monitoring the corrosion inhibitor is arranged on the heat-insulating layer.

In one embodiment, the reaction vessel comprises a vessel body for storing the corrosion inhibitor, a sealing cover and a connecting assembly for detachably connecting the vessel body and the sealing cover, the vessel body is provided with a feed inlet for communicating the inner container and the outside, and the vessel body is provided with the sealing cover on the feed inlet cover.

In one embodiment, the connecting assembly includes a first flange plate disposed on the container body, a second flange plate disposed on the sealing cover, and a plurality of connecting members for connecting the first flange plate and the second flange plate.

In one embodiment, the coupling assembling includes a plurality of joint portions that evenly lay along the circumference of sealed lid, set up in the surface of vessel and with a plurality of joint arch of joint portion looks adaptation, and set up in vessel with the sealing washer between the sealed lid.

In one embodiment, a first valve for controlling the connection or disconnection of the first pipeline is arranged on the first pipeline, and a second valve for controlling the connection or disconnection of the second pipeline is arranged on the second pipeline.

In one embodiment, the first valve and the second valve are both solenoid valves.

In one embodiment, the monitoring sensor is an electrochemical sensor, and the monitoring sensor comprises a circuit board and a metal coating arranged on the circuit board.

In one embodiment, the vapor phase corrosion inhibitor monitoring device further comprises a sampling pipeline for communicating the inner container with the outside, and a third valve for controlling the communication or disconnection of the sampling pipeline is arranged on the sampling pipeline.

In one embodiment, a fourth valve for controlling the connection or disconnection of the sampling pipeline is arranged between one end of the sampling pipeline, which is connected with the inner container, and the third valve.

In one embodiment, the insulation layer is a polyurethane insulation layer or a rock wool insulation layer.

The utility model provides a vapor phase inhibitor monitoring devices for insulating pipeline's beneficial effect lies in: compared with the prior art, the vapor phase corrosion inhibitor monitoring device of the utility model is used for corrosion protection of the heat preservation pipeline, and the heat preservation pipeline comprises a conveying pipe for conveying liquid, a protection cylinder sleeved on the conveying pipe, and a heat preservation layer arranged between the conveying pipe and the protection cylinder; the gas phase corrosion inhibitor monitoring device comprises a reaction container, a first pipeline and a second pipeline, wherein the reaction container is provided with an inner container and used for storing a corrosion inhibitor, the first pipeline is used for conveying nitrogen to the inner container, the second pipeline is used for communicating the inner container and an insulating layer, the nitrogen is conveyed to the inner container of the reaction container through the first pipeline, the corrosion inhibitor stored in the inner container is atomized, the atomized corrosion inhibitor in the reaction container is conveyed to the insulating layer of the insulating pipeline through the second pipeline, and the corrosion problem of the surface of the conveying pipe under the insulating layer is solved; meanwhile, a monitoring sensor for monitoring the corrosion inhibitor is arranged on the heat insulation layer to monitor the corrosion inhibition effect of the corrosion inhibitor in real time, and the vapor phase corrosion inhibitor monitoring device is simple in structure, can effectively reduce on-site inspection of personnel, determines the dosing period, improves the use efficiency of the corrosion inhibitor, and improves the reliability of the heat insulation pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions 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 the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a vapor phase corrosion inhibitor monitoring device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a monitoring sensor of a vapor phase corrosion inhibitor monitoring device according to an embodiment of the present invention.

Wherein, in the figures, the various reference numbers:

1. a reaction vessel; 11. an inner container; 12. a container body; 13. a sealing cover; 14. a connecting assembly; 141. a first flange plate; 142. a second flange plate; 143. a connecting member; 2. a first conduit; 21. a first valve; 3. a second pipe; 31. a second valve; 4. a heat-insulating pipeline; 41. a delivery pipe; 42. a protective cylinder; 43. a heat-insulating layer; 5. monitoring a sensor; 51. a circuit board; 52. coating a metal film; 6. a sampling pipe; 61. a third valve; 62. and a fourth valve.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the vapor phase corrosion inhibitor monitoring device provided in this embodiment is used for corrosion protection of a thermal insulation pipeline 4, where the thermal insulation pipeline 4 includes a conveying pipe 41 for conveying liquid, a protection cylinder 42 sleeved on the conveying pipe 41, and a thermal insulation layer 43 disposed between the conveying pipe 41 and the protection cylinder 42; the gas phase corrosion inhibitor monitoring device comprises a reaction container 1 which is provided with an inner container 11 and used for storing a corrosion inhibitor, a first pipeline 2 used for conveying nitrogen to the inner container 11, and a second pipeline 3 used for communicating the inner container 11 and a heat preservation layer 43, wherein the nitrogen is conveyed to the inner container 11 of the reaction container 1 through the first pipeline 2, the corrosion inhibitor stored in the inner container 11 is atomized, and the atomized corrosion inhibitor in the reaction container 1 is conveyed to the heat preservation layer 43 of the heat preservation pipeline 4 through the second pipeline 3, so that the corrosion problem of the surface of a conveying pipe 41 under the heat preservation layer 43 is treated; meanwhile, the monitoring sensor 5 for monitoring the corrosion inhibitor is arranged on the heat insulation layer 43, the corrosion inhibition effect of the corrosion inhibitor is monitored in real time, the vapor phase corrosion inhibitor monitoring device is simple in structure, the field inspection of personnel can be effectively reduced, the dosing period is determined, the use efficiency of the corrosion inhibitor is improved, and the reliability of the heat insulation pipeline 4 is improved.

Referring to fig. 1, as a specific embodiment of the vapor phase corrosion inhibitor monitoring device provided in this embodiment, a reaction vessel 1 of the vapor phase corrosion inhibitor monitoring device is a stainless steel vessel with a volume of 6 liters. Reaction vessel 1 is including the vessel 12 that is used for storing the corrosion inhibitor, sealed lid 13, and be used for dismantling coupling assembling 14 who connects vessel 12 and sealed lid 13, set up intercommunication inner bag 11 and external charge door on vessel 12, vessel 12 is located the charge door and is equipped with sealed lid 13, through set up intercommunication inner bag 11 and external charge door on vessel 12 at reaction vessel 1, the operating personnel can in time supply the corrosion inhibitor in vessel 12 through the charge door, it is connected with sealed lid 13 to be dismantled to be located the charge door at vessel 12, make reaction vessel 1's inner bag 11 form a sealed space, and then provide the operation environment for the corrosion inhibitor in the inner bag 11 provides atomizing treatment, the operating personnel can be through opening reaction vessel 1's sealed lid 13, supply the corrosion inhibitor of storage in vessel 12, and carry nitrogen gas to reaction vessel 1's inner bag 11 by first pipeline 2, carry out atomizing treatment to the corrosion inhibitor. The specific structure of the connecting assembly 14 for detachably connecting the container body 12 and the sealing cap 13 is not limited thereto. Optionally, the connecting assembly 14 includes a first flange 141 disposed on the container body 12, a second flange 142 disposed on the sealing cover 13, and a plurality of connecting members 143 for connecting the first flange 141 and the second flange 142, the first flange 141 and the second flange 142 are connected by the plurality of connecting members 143, a flange pad is disposed between the first flange 141 and the second flange 142, the container body 12 and the sealing cover 13 of the reaction container 1 are fixedly connected by a detachable connection manner of flange connection, and the sealing performance of the reaction container 1 is ensured while the stable connection between the container body 12 and the sealing cover 13 is ensured; optionally, the plurality of connecting members 143 for connecting the first flange 141 and the second flange 142 are connecting bolts, and the first flange 141 and the second flange 142 are detachably connected by a threaded connection, so that the assembling and disassembling by an operator are facilitated. Optionally, coupling assembling 14 includes a plurality of joint portions that evenly lay along the circumference of sealed lid 13, set up at the surface of vessel 12 and protruding with a plurality of joints of a plurality of joint looks adaptations, and set up the sealing washer between vessel 12 and sealed lid 13, be connected with the protruding buckle of a plurality of joints on vessel 12 through a plurality of joint portions on the sealed lid 13, and be provided with the sealing washer between vessel 12 and sealed lid 13, utilize the detachable connection mode fixed connection reaction vessel 1's vessel 12 and sealed lid 13 of buckle connection, when guaranteeing to stabilize between vessel 12 and the sealed lid 13 and being connected, guarantee reaction vessel 1's sealing performance, the operating personnel of being convenient for simultaneously equipment and dismantlement, improve the operating efficiency.

Referring to fig. 1, in the present embodiment, the first pipe 2 and the second pipe 3 of the vapor phase corrosion inhibitor monitoring device both use stainless steel pipes with an inner diameter of 3 mm. Optionally, a first valve 21 for controlling the connection or disconnection of the first pipeline 2 is arranged on the first pipeline 2, and the connection or disconnection of the first pipeline 2 is controlled by the first valve 21, so that the time for the first pipeline 2 to convey high-purity nitrogen into the reaction vessel 1 is controlled, and further the corrosion inhibitor in the reaction vessel 1 is controlled to be atomized. Optionally, a second valve 31 for controlling the connection or disconnection of the second pipeline 3 is arranged on the second pipeline 3, and the connection or disconnection of the second pipeline 3 is controlled by the second valve 31, so that the second pipeline 3 is controlled to convey the atomized corrosion inhibitor in the reaction vessel 1 to the heat insulation layer 43, and the dosing operation is performed in time. Optionally, the first valve 21 and the second valve 31 are both solenoid valves, so that the first valve 21 and the second valve 31 can adopt a programmable logic controller to realize expected control, the control precision is guaranteed, an operator can automatically adjust and set according to actual dosing logic, and the atomization time and dosing period of the corrosion inhibitor are automatically controlled.

Referring to fig. 1 to 2, in the present embodiment, the insulation layer 43 of the insulation assembly is a polyurethane insulation layer 43 or a rock wool insulation layer 43, which has the characteristics of heat insulation and cold insulation, and is beneficial to ensure the temperature of the chilled water conveyed by the conveying pipe 41 of the insulation pipeline 4. A monitoring sensor 5 for monitoring the corrosion inhibitor is arranged on the heat preservation layer 43, so that the corrosion inhibition effect of the corrosion inhibitor is monitored in real time; optionally, the monitoring sensor 5 is an electrochemical sensor, has short measurement period and high sensitivity, and can realize real-time monitoring; the electrochemical sensor works by reacting with the measured gas and generating an electrical signal proportional to the gas concentration; the electrochemical sensor consists of a sensing electrode (or working electrode) and a counter electrode, and is separated by a thin electrolyte layer, gas firstly reacts with the sensor through tiny capillary-shaped openings, then a hydrophobic barrier layer finally reaches the surface of the electrode, and by adopting the method, a proper amount of gas can be allowed to react with the sensing electrode to form a sufficient electric signal, and meanwhile, electrolyte is prevented from leaking out of the sensor; the gas diffusing through the barrier reacts with the sensing electrode, which may employ an oxidation mechanism or a reduction mechanism, catalyzed by an electrode material designed for the gas to be measured, and a current proportional to the concentration of the gas to be measured flows between the positive and negative electrodes through a resistor connected between the electrodes, and the gas concentration is determined by measuring the current. Optionally, the monitoring sensor 5 includes a circuit board 51 and a metal coating 52 disposed on the circuit board 51, and the metal coating 52 may be replaced according to requirements, and may be made of copper, platinum, gold, or other metals.

Referring to fig. 1, in the present embodiment, the vapor phase corrosion inhibitor monitoring apparatus further includes a sampling pipeline 6 for communicating the inner container 11 with the outside, the atomized corrosion inhibitor in the reaction container 1 can be transported to the outside by using the sampling pipeline 6, and an operator can independently monitor and evaluate the corrosion inhibition effect of the corrosion inhibitor by sampling at regular time, and at the same time, indirectly verify the corrosion inhibition effect of the corrosion inhibitor in the insulating layer 43, check the accuracy of the data of the monitoring sensor 5, and effectively improve the reliability of the vapor phase corrosion inhibitor monitoring apparatus; optionally, a third valve 61 for controlling the connection or disconnection of the sampling pipeline 6 is arranged on the sampling pipeline 6, the connection or disconnection of the sampling pipeline 6 is controlled through the third valve 61, so that the connection or disconnection of the inner container 11 of the reaction container 1 and the outside is controlled, an operator opens the third valve 61 according to a sampling requirement, the inner container 11 of the reaction container 1 is communicated with the outside, and the atomized corrosion inhibitor is conveyed to the outside through the sampling pipeline 6 for sampling by the operator. Optionally, a fourth valve 64 for controlling the connection or disconnection of the sampling pipe 6 is arranged between the end of the sampling pipe 6, which is located at the inner container 11, and the third valve 61, and the connection or disconnection of the sampling pipe 6 is controlled by additionally arranging the fourth valve 64, so that the collected corrosion inhibitor samples which have been subjected to atomization treatment can be stagnated in the sampling pipe 6 for a certain period of time, the corrosion inhibitor samples with different concentrations are fully mixed, the accuracy of corrosion inhibition effect data obtained by independent sampling is favorably ensured, and the reliability of the gas phase corrosion inhibitor monitoring device is further improved. Optionally, the third valve 61 and the fourth valve 64 are both solenoid valves, so that the third valve 61 and the fourth valve 64 can be controlled by a programmable logic controller to ensure control accuracy.

The operation steps of the vapor phase corrosion inhibitor monitoring device for corrosion inhibitor sampling verification are as follows:

initial state: the first, second and third valves 21, 31 and 61 are closed and the fourth valve 64 is open;

when in use: s1, opening a first valve 21, conveying nitrogen into an inner container 11 of a reaction container 1 through a first pipeline 2, atomizing a corrosion inhibitor stored in the inner container 11, and closing after 5 seconds;

s2, standing for 24 hours, closing the fourth valve 64, opening the third valve 61 to convey the atomized corrosion inhibitor in the reaction vessel 1 into the sampling pipeline 6, closing the third valve 61 after 5 seconds, standing for 24 hours, and opening the fourth valve 64 to convey the corrosion inhibitor staying in the sampling pipeline 6 to the outside for sampling by operators;

s3, repeating the step S2 until the corrosion inhibition effect of the corrosion inhibitor is independently monitored and evaluated to meet the requirement;

s4, opening the first valve 21, conveying nitrogen to the inner container 11 of the reaction container 1 through the first pipeline 2, atomizing the corrosion inhibitor stored in the inner container 11, opening the second valve 31 after 10 days, conveying the atomized corrosion inhibitor in the reaction container 1 to the heat-insulating layer 43 through the second pipeline 3, treating the corrosion problem of the surface of the conveying pipe 41 below the heat-insulating layer 43, and closing the second valve 31 after 1 hour.

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

Claims (10)

1. The utility model provides a vapor phase inhibitor monitoring devices for insulating tube, insulating tube establishes including conveyer pipe, the cover that is used for carrying liquid a protection section of thick bamboo on the conveyer pipe, and set up the conveyer pipe with heat preservation between the protection section of thick bamboo, its characterized in that: the gas phase corrosion inhibitor monitoring device comprises a reaction container, a first pipeline and a second pipeline, wherein the reaction container is provided with an inner container and is used for storing a corrosion inhibitor, the first pipeline is used for conveying nitrogen to the inner container, the second pipeline is used for communicating the inner container and the heat-insulating layer, and the second pipeline conveys the corrosion inhibitor which is atomized in the reaction container to the heat-insulating layer; and a monitoring sensor for monitoring the corrosion inhibitor is arranged on the heat-insulating layer.

2. The vapor phase corrosion inhibitor monitoring apparatus of claim 1, wherein: the reaction vessel comprises a vessel body for storing the corrosion inhibitor, a sealing cover and a connecting assembly for detachably connecting the vessel body and the sealing cover, the vessel body is provided with a feed inlet communicated with the inner container and the outside, and the vessel body is positioned on the feed inlet cover and provided with the sealing cover.

3. The vapor phase corrosion inhibitor monitoring apparatus of claim 2, wherein: coupling assembling establishes including the cover first ring flange on the vessel body, the cover is established sealed epaxial second ring flange of covering, and be used for connecting first ring flange with a plurality of connecting pieces of second ring flange.

4. The vapor phase corrosion inhibitor monitoring apparatus of claim 2, wherein: coupling assembling includes along a plurality of joint portions that sealed circumference of lid was evenly laid, set up be in vessel's surface and with a plurality of joint portion looks adaptation are protruding, and set up vessel with sealing washer between the sealed lid.

5. The vapor phase corrosion inhibitor monitoring apparatus of claim 1, wherein: the first pipeline is provided with a first valve for controlling the connection or disconnection of the first pipeline, and the second pipeline is provided with a second valve for controlling the connection or disconnection of the second pipeline.

6. The vapor phase corrosion inhibitor monitoring device of claim 5, wherein: the first valve and the second valve are both solenoid valves.

7. A vapor phase corrosion inhibitor monitoring device according to any one of claims 1 to 6, wherein: the monitoring sensor is an electrochemical sensor and comprises a circuit board and a metal coating arranged on the circuit board.

8. A vapor phase corrosion inhibitor monitoring apparatus according to any one of claims 1 to 6, wherein: the vapor phase inhibitor monitoring device also comprises a sampling pipeline for communicating the inner container and the outside, and a third valve for controlling the communication or disconnection of the sampling pipeline is arranged on the sampling pipeline.

9. The vapor phase corrosion inhibitor monitoring device of claim 8, wherein: and a fourth valve for controlling the connection or disconnection of the sampling pipeline is arranged between one end of the sampling pipeline, which is connected with the inner container, and the third valve.

10. A vapor phase corrosion inhibitor monitoring device according to any one of claims 1 to 6, wherein: the heat-insulating layer is a polyurethane heat-insulating layer or a rock wool heat-insulating layer.

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