Exhaust device and exhaust method thereof

Abstract

The invention discloses an exhaust device and an exhaust method thereof. The exhaust device comprises a water filling system, and the water filling system comprises a water filling auxiliary subsystem and a pressurizing subsystem for pressurizing water; the water filling auxiliary subsystem comprises a water storage container, a water outlet connector, a water inlet connector, a water filling switch valve, a one-way valve and a water filling connector. The first end of the water outlet interface is communicated with the water storage container, the second end of the water outlet interface and the first end of the water inlet interface are respectively connected with the pressurization subsystem, the second end of the water inlet interface is connected with the water filling interface through the water filling switch valve and the one-way valve, and the conduction direction of the one-way valve faces the water filling interface; and the water filling interface is used for externally connecting a differential pressure transmitter system. The water filling system can carry out on-line water filling and air exhausting on a high-temperature and high-pressure differential pressure transmitter system, workers and an air exhausting device can be prevented from making contact with high-temperature and high-pressure water, and the water filling system is safe and reliable. In addition, the exhaust device adopts a modular component design, so that the moving portability of the exhaust device of the unit under different working conditions can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument maintenance, and particularly to an exhaust device and an exhaust method thereof. Background Art

[0002] With the continuous development of industry, the exhaust device, as an auxiliary device, is widely used in the industrial field. Its main function is to fill water and exhaust air for fluid pipelines or fluid equipment, enabling the equipment to operate normally.

[0003] For an instrument measurement system, since the instrument parameters need to be measured by taking pressure from an on-line system, when there is air in the pressure-taking pipeline or inside the instrument, due to the greater compressibility of gas relative to water, under the condition of process system pressure fluctuation, the gas volume will produce elastic fluctuation like a spring effect, resulting in frequent fluctuation of the instrument pressure measurement, affecting the reliable performance, accurate performance and service life of the instrument measurement system. Therefore, in order to ensure the reliable performance of the instrument measurement system, it is necessary to fill water and exhaust air for the instrument measurement system.

[0004] The current main operation method for the water filling and exhausting work of the instrument measurement system is that after the instrument maintenance work is completed, the system medium is exported from the process system to fill the instrument pipeline with the medium and exhaust the air in the instrument pipeline and inside the instrument. The main problem faced by this water filling and exhausting method is that in the case of high temperature and high pressure in the instrument measurement system, the discharge of high temperature and high pressure medium will harm the human body and damage the instrument. Therefore, the difficult problem to be solved is how to exhaust the air in the instrument pipeline and inside the instrument under the condition of high temperature and high pressure in the instrument measurement system, and the exhaust device needs to work in an environment of ≥350°C and ≥16 Mpa. The exhaust devices of related technologies cannot perform on-line water filling and exhausting for high temperature and high pressure systems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an exhaust device and an exhaust method thereof for at least one defect existing in the related technologies mentioned in the above background art: the exhaust devices of related technologies cannot perform on-line water filling and exhausting for high temperature and high pressure systems.

[0006] The technical solution adopted by the present invention to solve its technical problem is to construct an exhaust device, including a water filling system, and the water filling system includes a water filling auxiliary subsystem and a pressure boosting subsystem for boosting water pressure;

[0007] The water filling auxiliary subsystem includes a water storage container, a water outlet interface, a water inlet interface, a water filling switch valve, a one-way valve and a water filling interface;

[0008] The first end of the water outlet interface is communicated with the water storage container. The second end of the water outlet interface and the first end of the water inlet interface are respectively connected to the pressurization subsystem. The second end of the water inlet interface is connected to the water filling interface through the water filling switch valve and the one-way valve, and the conduction direction of the one-way valve faces the water filling interface. The water filling interface is used for externally connecting a differential pressure transmitter system.

[0009] In some embodiments, the water filling auxiliary subsystem further includes a safety valve.

[0010] The first end of the safety valve is connected to the pipeline between the water filling switch valve and the one-way valve, and the second end of the safety valve is connected to the water storage container.

[0011] In some embodiments, the water filling auxiliary subsystem further includes a first pressure measuring element and a second pressure measuring element.

[0012] The first pressure measuring element is connected to the pipeline between the one-way valve and the water filling interface. The second pressure measuring element is connected to the pipeline between the second end of the water inlet interface and the water filling switch valve.

[0013] In some embodiments, the pressurization subsystem includes a water inlet, a water outlet, a gas-driven hydraulic pump, and an air compressor for driving the gas-driven hydraulic pump to pressurize water.

[0014] The first end of the water inlet is connected to the second end of the water outlet interface. The second end of the water inlet is communicated with the inlet of the gas-driven hydraulic pump. The outlet of the gas-driven hydraulic pump is connected to the first end of the water outlet. The second end of the water outlet is connected to the first end of the water inlet interface.

[0015] In some embodiments, the exhaust device further includes a drainage system. The drainage system includes a drainage interface, a heat dissipation device for cooling water, a pressure reduction device for reducing the pressure of water, a drainage switch valve, a regulating device for regulating the water flow rate, and a waste water container connected in sequence.

[0016] In some embodiments, the drainage system further includes a third pressure measuring element and a fourth pressure measuring element. The third pressure measuring element is connected to the pipeline between the drainage interface and the heat dissipation device. The fourth pressure measuring element is connected to the pipeline between the drainage switch valve and the regulating device.

[0017] The present invention also constructs an exhaust method for the exhaust device described in any one of the above, which is applied to a differential pressure transmitter system. The exhaust method of the exhaust device includes a system pipeline water filling and exhaust method. The system pipeline water filling and exhaust method includes a water filling step, and the water filling step includes:

[0018] Connect the water filling interface to the high-pressure side three-way valve on the high-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system or the low-pressure side three-way valve on the low-pressure side pipeline.

[0019] Open the water filling switch valve and the high-pressure side three-way valve on the high-pressure side pipeline or the low-pressure side three-way valve on the low-pressure side pipeline.

[0020] Control the pressurization subsystem to increase the pressure.

[0021] When the liquid level in the water storage container drops to the first preset liquid level, control the pressurization subsystem to relieve pressure.

[0022] Close the water filling switch valve and the high-pressure side three-way valve on the high-pressure side pipeline or the low-pressure side three-way valve on the low-pressure side pipeline, and the water filling is completed.

[0023] In some embodiments, the method for filling and exhausting the system pipeline further includes a pre-water filling step, and the pre-water filling step includes:

[0024] Connect the water filling auxiliary subsystem and the pressurization subsystem, and add water to the water storage container.

[0025] Fix the water filling interface at a position higher than the water surface in the water storage container.

[0026] Open the water filling switch valve.

[0027] Control the pressurization subsystem to increase the pressure until water flows out of the water filling interface.

[0028] Close the water filling switch valve, and the pre-water filling is completed.

[0029] In some embodiments, the exhaust device further includes the drainage system, and the exhaust method of the exhaust device further includes a drainage and exhaust method, and the drainage and exhaust method includes the following steps:

[0030] Before connecting to the differential pressure transmitter system, confirm that the high-pressure side three-way valve on the high-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system or the low-pressure side three-way valve on the low-pressure side pipeline is in the closed state, and confirm that the drainage switch valve is in the closed state.

[0031] Adjust the pressure reducing device and adjust it to the minimum output pressure.

[0032] Adjust the regulating device and adjust the flow rate to the minimum.

[0033] Connect the drainage interface to the high-pressure side three-way valve on the high-pressure side pipeline or the low-pressure side three-way valve on the low-pressure side pipeline.

[0034] Open the drainage switch valve, and open the high-pressure side three-way valve on the high-pressure side pipeline or the low-pressure side three-way valve on the low-pressure side pipeline;

[0035] When the liquid level in the waste water container rises to the second preset liquid level, close the drainage switch valve, close the high-pressure side three-way valve on the high-pressure side pipeline or the low-pressure side three-way valve on the low-pressure side pipeline, and the drainage ends.

[0036] In some embodiments, the exhaust method of the exhaust device further includes a differential pressure transmitter water filling and exhaust method, and the differential pressure transmitter water filling and exhaust method includes the following steps:

[0037] Close the high-pressure side isolation valve on the high-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system, and close the low-pressure side isolation valve on the low-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system;

[0038] Open the balance valve between the high-pressure side pipeline and the low-pressure side pipeline;

[0039] Open the high-pressure side exhaust valve of the differential pressure transmitter in the differential pressure transmitter system;

[0040] Connect the water filling interface to the low-pressure side three-way valve on the low-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system, and open the low-pressure side three-way valve to fill water into the low-pressure side pipeline until water flows out of the high-pressure side exhaust valve of the differential pressure transmitter;

[0041] Close the high-pressure side exhaust valve of the differential pressure transmitter, and open the low-pressure side exhaust valve of the differential pressure transmitter in the differential pressure transmitter system;

[0042] Close the low-pressure side three-way valve on the low-pressure side pipeline, remove the water filling interface, connect the water filling interface to the high-pressure side three-way valve on the high-pressure side pipeline of the differential pressure transmitter in the differential pressure transmitter system, and open the high-pressure side three-way valve until water flows out of the low-pressure side exhaust valve of the differential pressure transmitter;

[0043] Close the low-pressure side exhaust valve of the differential pressure transmitter, close the high-pressure side three-way valve on the high-pressure side pipeline, close the balance valve between the high-pressure side pipeline and the low-pressure side pipeline, reopen the high-pressure side isolation valve on the high-pressure side pipeline, and reopen the low-pressure side isolation valve on the low-pressure side pipeline, and the water filling ends.

[0044] By implementing the present invention, the following beneficial effects are achieved:

[0045] The water filling system of the present invention can perform on-line water filling and exhaust for the differential pressure transmitter system under high temperature and high pressure. During the entire exhaust process, the staff only needs to operate the exhaust device and does not need to operate the differential pressure transmitter system. Moreover, its check valve can prevent the reverse flow of high temperature and high pressure water, avoiding the staff and the exhaust device from coming into contact with high temperature and high pressure water, playing a role of medium isolation protection, being safe and reliable, and ensuring the safety of the staff. In addition, the exhaust device adopts a modular component design, which can meet the portability of the exhaust device movement under different working conditions of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0047] Figure 1 shows the logical structure diagram of an embodiment in the water filling auxiliary subsystem of the present invention;

[0048] Figure 2 shows the logical structure diagram of an embodiment in the pressurization subsystem of the present invention;

[0049] Figure 3 shows the logical structure diagram of an embodiment in the drainage system of the present invention;

[0050] Figure 4 shows the logical structure diagram of an embodiment in the differential pressure transmitter system of the present invention;

[0051] Figure 5 shows the flowchart of an embodiment in the water filling step of the method for filling and exhausting water in the system pipeline of the present invention;

[0052] Figure 6 shows the flowchart of an embodiment in the pre-water filling step of the method for filling and exhausting water in the system pipeline of the present invention;

[0053] Figure 7 shows the flowchart of an embodiment in the drainage and exhaust method of the present invention;

[0054] Figure 8 shows the flowchart of an embodiment in the method for filling and exhausting water in the differential pressure transmitter of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0056] It should be noted that the flowcharts shown in the drawings are only illustrative and do not necessarily include all the contents and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined. Therefore, the actual execution order may be changed according to the actual situation.

[0057] The block diagrams shown in the drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0058] Differential pressure transmitters are used in many scenarios in power plants. The differential pressure transmitter can be used for pressure measurement of high-temperature and high-pressure media, and can achieve stable performance at an ambient temperature of 191°C. The temperature and pressure parameters of the measuring medium of the instruments related to the primary loop can reach 15.5 Mpa and 350°C.

[0059] As Figure 4 shown, the differential pressure transmitter system 4 includes a main pipeline 40 and a differential pressure transmitter 41. The differential pressure transmitter 41 is connected to the main pipeline 40 through a high-pressure side pipeline 42 and a low-pressure side pipeline 43, and obtains an accurate measurement value of the water pressure in the main pipeline 40. A high-pressure side isolation valve 44 is provided on the high-pressure side pipeline 42, and a low-pressure side isolation valve 45 is provided on the low-pressure side pipeline 43. The connection or disconnection with the main pipeline 40 is achieved by switching the isolation valves. In addition, a balance valve 46 is provided between the high-pressure side pipeline 42 and the low-pressure side pipeline 43, and the connection or disconnection between the high-pressure side pipeline 42 and the low-pressure side pipeline 43 is achieved by switching the balance valve 46. A high-pressure side three-way valve 47 is also provided on the high-pressure side pipeline 42 between the high-pressure side isolation valve 44 and the differential pressure transmitter 41, and a low-pressure side three-way valve 48 is also provided on the low-pressure side pipeline 43 between the low-pressure side isolation valve 45 and the differential pressure transmitter 41. In addition, a high-pressure side exhaust valve 411 communicating with the high-pressure side pipeline 42 and a low-pressure side exhaust valve 412 communicating with the low-pressure side pipeline 43 are provided on the differential pressure transmitter 41.

[0060] In some conventional usage scenarios, the differential pressure transmitter system 4 can drain water and discharge gas by opening the high-pressure side exhaust valve 411 and the low-pressure side exhaust valve 412. However, when the water inside the differential pressure transmitter system 4 is in a high-temperature or high-pressure state (≥360°C, ≥16 Mpa), if the gas is directly exhausted through the exhaust valve, the water inside the differential pressure transmitter system 4 will spray outwards, easily causing casualties and equipment damage.

[0061] Therefore, the core of the present invention is to construct an exhaust device that can exhaust the differential pressure transmitter system 4 in different environments. In addition to working safely and reliably, the exhaust device also needs to consider reliable protection measures to ensure the safety of the staff and avoid scalding the staff with high-temperature and high-pressure water when using the exhaust device. At the same time, the exhaust device does not belong to a part of the differential pressure transmitter system 4 and is only used when the differential pressure transmitter system 4 needs to be overhauled. Therefore, while ensuring the reliability of the exhaust device, it is also necessary to consider whether the exhaust device is convenient for transportation and installation.

[0062] The differential pressure transmitter system 4 may operate in a conventional environment (with relatively low pressure and temperature ≤ 120°C), or it may operate in an extreme high-temperature and high-pressure environment (≥ 360°C, ≥ 16 Mpa). In both scenarios, the exhaust device should be able to complete the exhaust function normally.

[0063] In a conventional environment, the exhaust device can use the water drainage method to exhaust the main pipeline 40 in the differential pressure transmitter system 4. Since the temperature and pressure of the water in the main pipeline 40 are not high at this time, the exhaust device includes a heat dissipation device 31 for cooling the water, a pressure reduction device 32 for reducing the pressure of the water, and a regulating device 34 for adjusting the water flow rate, so that the pressure, temperature, and flow rate of the water discharged from the main pipeline 40 through the exhaust device reach the safety threshold.

[0064] In an extreme environment, the exhaust device can use the water filling method to exhaust the main pipeline 40 in the differential pressure transmitter system 4. Since the temperature and pressure of the water in the main pipeline 40 are very high at this time, reliable fluid equipment, valves, and interfaces can generally withstand relatively high pressures (≥ 20 Mpa), but it is difficult to operate stably in a high-temperature and high-pressure environment (≥ 20 Mpa, ≥ 150°C) for a long time. Even if it can withstand, keeping the equipment in an extreme high-temperature and high-pressure environment for a long time will easily cause aging and equipment damage, thus bringing greater safety hazards.

[0065] On the other hand, from the perspective of safe use, since the staff directly operates the exhaust device, if high-temperature and high-pressure water flows into the exhaust device, it is equivalent to exposing the staff to an extreme environment. Unless the exhaust device can quickly reduce the pressure and temperature of the outflowing water, and since a large cooling component needs to be installed in the exhaust device to quickly cool the high-temperature water, this will make the exhaust device not portable. Considering the above factors, it should be avoided that high-temperature and high-pressure water flows into the exhaust device. Using the water filling method for exhaust, normal temperature water is pressurized and injected into the main pipeline 40 of the differential pressure transmitter system 4 to squeeze out the gas in the main pipeline 40, and high-temperature and high-pressure water will not flow into the exhaust device during the entire operation process.

[0066] In addition, the exhaust device can also use the water filling method to exhaust the differential pressure transmitter 41 after the water temperature inside the differential pressure transmitter 41 has cooled down.

[0067] Therefore, the exhaust device mainly consists of two systems: the drainage system 3 and the water filling system. Both systems can exhaust the main pipeline 40 of the differential pressure transmitter system 4. The drainage system 3 is relatively simple and easy to operate, mainly used in conventional environments. Since the water filling system needs to use the pressurization subsystem 2 to pressurize the water to a pressure greater than that of the differential pressure transmitter system 4 and then inject the water into the differential pressure transmitter system 4, its operation is relatively complex and it is mainly used in high-temperature and high-pressure environments. The two systems are suitable for use in different scenarios, which on the one hand fully ensures the reliability and operational safety of the exhaust device, and on the other hand also reduces the complexity of the exhaust device.

[0068] The functions of both the drainage system 3 and the water filling system are to discharge the gas in the main pipeline 40 of the differential pressure transmitter system 4, and the water filling system also discharges the gas in the differential pressure transmitter 41 of the differential pressure transmitter system 4. The drainage system 3 and the water filling system are not used simultaneously in actual scenarios. The water filling system and the exhaust system can be used as two independent systems respectively, or can be integrated into one system for coordinated use.

[0069] The two systems have different usage scenarios. The drainage system 3 is mainly used for drainage. Through drainage, the gas in the main pipeline 40 of the differential pressure transmitter system 4 is discharged with the water flow. Since the discharged water has a certain pressure and temperature, the drainage system 3 mainly considers cooling and depressurizing the water. While the water filling system mainly considers how to reliably pressurize the external water to the required pressure and inject it into the differential pressure transmitter system 4, and at the same time ensure that the high-temperature and high-pressure water inside the differential pressure transmitter system 4 does not flow back to the exhaust device during the water injection process.

[0070] Some embodiments of the present invention disclose an exhaust device, including a water filling system, and the water filling system includes a water filling auxiliary subsystem 1 as shown in Figure 1 and a pressurization subsystem 2 for pressurizing water as shown in Figure 2 .

[0071] As shown in Figure 1 , the water filling auxiliary subsystem 1 includes a water storage container 10, a water outlet interface 11, a water inlet interface 12, a water filling switch valve 13, a one-way valve 14 and a water filling interface 15.

[0072] The water storage container 10 is used to provide a water source. The first end of the water outlet interface 11 is connected to the water storage container 10, and the second end of the water outlet interface 11 and the first end of the water inlet interface 12 are respectively connected to the pressurization subsystem 2. The second end of the water inlet interface 12 is connected to the water filling interface 15 through the water filling switch valve 13 and the one-way valve 14, and the conduction direction of the one-way valve 14 is towards the water filling interface 15. The water filling interface 15 is used to connect to the differential pressure transmitter system 4 externally. For example, the water filling switch valve 13 is a stop valve. The stop valve here is only an example and does not limit the present application. It can also be others.

[0073] The water filling system can perform on-line water filling and air exhausting for the differential pressure transmitter system 4 under high temperature and high pressure. During the entire air exhausting process, the staff only needs to operate the air exhausting device and does not need to operate the differential pressure transmitter system 4. Moreover, its check valve 14 can prevent the backflow of high temperature and high pressure water, avoiding the staff and the air exhausting device from coming into contact with high temperature and high pressure water, playing a role in medium isolation and protection, being safe and reliable, and ensuring the safety of the staff. In addition, the air exhausting device adopts a modular component design, which can meet the portability requirements of the air exhausting device movement under different working conditions of the unit.

[0074] In some embodiments, both the water filling auxiliary subsystem 1 and the pressurization subsystem 2 are configured as a portable toolbox, and the two subsystems need to be used in combination to complete the water injection function. Dividing the water filling system into two subsystems is mainly considered from the following aspects: one is to make the system portable. Since the volume of the pressurization subsystem 2 is relatively large, if the two subsystems are integrated into a portable toolbox, the volume and weight of the entire portable toolbox will increase, which is not conducive to the staff carrying; the second is to facilitate the direct upgrade of the pressurization subsystem 2 in the future, while the water filling auxiliary subsystem 1 can remain unchanged; the third is to facilitate subsequent production testing. The pressurization equipment can adopt standard equipment and can be tested through standard equipment.

[0075] In some embodiments, as Figure 1 shown, the water filling auxiliary subsystem 1 further includes a safety valve 16. The first end of the safety valve 16 is connected to the pipeline between the water filling switch valve 13 and the check valve 14, and the second end of the safety valve 16 is connected to the water storage container 10. The safety valve 16 relieves pressure under high pressure to ensure that the pressure of the water filling auxiliary subsystem 1 does not exceed the standard, avoiding damage to the water filling auxiliary subsystem 1 caused by excessive high-pressure water.

[0076] In some embodiments, as Figure 1 shown, the water filling auxiliary subsystem 1 further includes a first pressure measuring element 17 and a second pressure measuring element 18. The first pressure measuring element 17 is connected to the pipeline between the check valve 14 and the water filling interface 15, and the first pressure measuring element 17 is used for the water pressure at the differential pressure transmitter system 4 end. The second pressure measuring element 18 is connected to the pipeline between the second end of the water inlet interface 12 and the water filling switch valve 13, and the second pressure measuring element 18 is used to measure the water filling pressure of the water filling auxiliary subsystem 1.

[0077] In some embodiments, as Figure 1 shown, the water filling auxiliary subsystem 1 further includes a return flow switch valve 19. The first end of the return flow switch valve 19 is connected to the pipeline between the water filling switch valve 13 and the check valve 14, and the second end of the return flow switch valve 19 is connected to the water storage container 10. For example, the return flow switch valve 19 is a globe valve. The globe valve here is only an example and does not limit the present application. It can also be others.

[0078] In some embodiments, the main function of the pressurization subsystem 2 is to increase the pressure of the input water to meet the requirements of the water filling auxiliary subsystem 1 (i.e., the water filling pressure is greater than the water pressure at the 4 - end of the differential pressure transmitter system), then inject the high - pressure water into the water filling auxiliary subsystem 1, and then inject it into the differential pressure transmitter system 4 through the water filling auxiliary subsystem 1 for exhaust. As Figure 2 shown, the pressurization subsystem 2 includes a water input port 20, a water output port 21, a gas - driven hydraulic pump 22, and an air compressor 23 (also known as an air compressor) used to drive the gas - driven hydraulic pump 22 to pressurize water. The first end of the water input port 20 is connected to the second end of the water outlet interface 11, the second end of the water input port 20 is in communication with the inlet of the gas - driven hydraulic pump 22, the outlet of the gas - driven hydraulic pump 22 is in communication with the first end of the water output port 21, and the second end of the water output port 21 is connected to the first end of the water inlet interface 12.

[0079] Using the gas - driven hydraulic pump 22 can reduce the volume and weight of the working box, and the mechanical structure of the gas - driven hydraulic pump 22 is simple and stable, not prone to mechanical failures, which can fully ensure the stability and reliability of the system. The air compressor 23 can be an AC - DC dual - use air compressor, which can be powered by AC or by DC power supply of a lithium battery.

[0080] The gas - driven hydraulic pump 22 requires the air compressor 23 to provide a power source for it. Therefore, when using the gas - driven hydraulic pump 22, an additional air compressor 23 needs to be configured. By adjusting the pressure of the air compressor 23, the pressure of the gas - driven hydraulic pump 22 can be indirectly adjusted. The small gas - driven hydraulic pump 22 + small air compressor 23 can increase the water pressure to a specified pressure, has the functions of voltage stabilization and pressure holding, the water flow rate of pressurized water injection can meet the system liquid filling requirements, and its volume and weight meet the system's portable and mobile requirements. For example, the liquid can be pressurized to 20 Mpa and the flow rate can reach 1 L / min.

[0081] In some other embodiments, the gas - driven hydraulic pump 22 and the air compressor 23 can also be replaced with an electric hydraulic pump.

[0082] In some embodiments, the exhaust device further includes a filtration system (not shown) for filtering impurities, and the water filling interface 15 is connected to the filtration system. When using the water filling system to inject water into the differential pressure transmitter system 4, it is necessary to filter the water to prevent impurities from entering the differential pressure transmitter system 4 and causing damage to the differential pressure transmitter 41.

[0083] In some embodiments, for the convenience of installation, the water outlet interface 11, the water inlet interface 12, the water input port 20, the water output port 21, and the water filling interface 15 can adopt quick - connect interfaces. The quick - connect interfaces are simple to operate and can ensure the reliability of the interface connection.

[0084] In some embodiments, such as Figure 1As shown, in order to facilitate connection, the pipeline between the one-way valve 14 and the water filling interface 15 is a flexible hose. When the water filling system is used in a high-temperature and high-pressure environment, the flexible hose will not come into contact with high-temperature and high-pressure water during this process.

[0085] In some embodiments, such as Figure 3 As shown, the exhaust device further includes a drainage system 3. The drainage system 3 can be an independent system and can be used as a portable toolbox alone. Using this portable toolbox can complete the drainage function alone. The drainage system 3 includes a drainage interface 30, a heat dissipation device 31 for cooling water, a pressure reducing device 32 for reducing the pressure of water, a drainage switch valve 33, an adjusting device 34 for adjusting the water flow rate, and a waste water container 35, which are connected in sequence. For example, the drainage switch valve 33 is a globe valve, and the pressure reducing device 32 is a pressure reducing valve. The globe valve and the pressure reducing valve here are only examples and do not limit the present application. It can also be others.

[0086] The main function of the drainage system 3 is to drain water and exhaust air from the main pipeline 40 of the differential pressure transmitter system 4. The drainage operation process is simple and does not require an external power supply, which is convenient for operation. The high-temperature and high-pressure water enters the heat dissipation device 31 through the drainage interface 30 for cooling, and then passes through the pressure reducing device 32 to reduce the pressure. The high-temperature and high-pressure water will become low-temperature and low-pressure water. The low-temperature and low-pressure water is adjusted to a suitable flow rate through the adjusting device 34 and then discharged. When the drainage volume reaches a certain amount, the gas will also be discharged together.

[0087] In some embodiments, such as Figure 3 As shown, the drainage system 3 further includes a third pressure measuring element 36 and a fourth pressure measuring element 37. The third pressure measuring element 36 is connected to the pipeline between the drainage interface 30 and the heat dissipation device 31, and the fourth pressure measuring element 37 is connected to the pipeline between the drainage switch valve 33 and the adjusting device 34.

[0088] In some embodiments, such as Figure 3 As shown, the pipeline between the drainage interface 30 and the heat dissipation device 31 is a flexible hose. The flexible hose is used to facilitate the connection between the drainage system 3 and the differential pressure transmitter system 4, but it is difficult for the flexible hose to be resistant to both high temperature and high pressure at the same time. Since the drainage system 3 and the water filling system will not be used simultaneously, different materials of flexible hoses can be used for the drainage system 3 and the water filling system during system design. A high-temperature resistant hose (pressure resistance ≤ 5 Mpa, temperature resistance ≤ 150 °C) is used during drainage; a high-pressure resistant hose (pressure resistance ≥ 16 Mpa, temperature resistance ≤ 60 °C) is used during water filling.

[0089] In some embodiments, the drainage system 3 is mainly used in an environment where the water temperature is less than or equal to 120°C. Since the pipes of the drainage system 3 are relatively thin and the flow rate can be reduced by adjusting the adjusting device 34, the water inside the pipes can be cooled by water cooling. That is, the heat dissipation device 31 is a heat exchange pipe located in the pool, and the heat exchange pipe is of a bent structure, such as a U shape, to increase the heat dissipation area and fully cool the water flowing into the pipes.

[0090] The installation position of the pressure reducing device 32 is behind the heat dissipation device 31, which can reduce the impact of high-pressure water on the adjusting device 34. The function of the adjusting device 34 is to adjust the flow rate, and it also plays a certain protective role when the pressure reducing device 32 fails.

[0091] Some embodiments of the present invention disclose an exhaust method for the exhaust device described in any of the above embodiments, which is applied to the differential pressure transmitter system 4. In an extreme environment, when there is gas in the main pipeline 40 of the differential pressure transmitter system 4 and exhaust is required, the exhaust method of the exhaust device includes a system pipeline water filling and exhaust method, and the system pipeline water filling and exhaust method includes a water filling step, as Figure 5 shown, the water filling step includes:

[0092] S11: Connect the water filling interface 15 to the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43 of the differential pressure transmitter 41 in the differential pressure transmitter system 4;

[0093] S12: Open the water filling switch valve 13, open the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, and make the water filling system access the main pipeline 40 through the high-pressure side pipeline 42 or the low-pressure side pipeline 43;

[0094] S13: Control the booster subsystem 2 to increase the pressure; specifically: control the booster subsystem 2 to increase the pressure at a first preset speed until the pressure measured by the second pressure measuring element 18 is greater than the pressure measured by the first pressure measuring element 17. When the pressure increase exceeds the standard, pressure relief can be performed through the safety valve 16;

[0095] S14: When the liquid level in the water storage container 10 drops to the first preset liquid level, control the booster subsystem 2 to relieve pressure; specifically: when observing that the liquid level scale of the water storage container 10 drops to the first preset liquid level, control the booster subsystem 2 to relieve pressure at a second preset speed until the pressure relief reaches the minimum, and then close the booster subsystem 2;

[0096] S15: Close the water filling switch valve 13, close the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, and the water filling ends.

[0097] In some embodiments, such as Figure 6As shown, the system pipeline water filling and air exhausting method further includes a pre-water filling step, and the pre-water filling step includes:

[0098] S21: Connect the water filling auxiliary subsystem 1 and the pressurizing subsystem 2, and add water to the water storage container 10;

[0099] S22: Fix the water filling interface 15 at a position higher than the water surface of the water storage container 10; specifically: raise and fix the water filling interface 15 of the hose. At this time, the water filling interface 15 is not connected to the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, and the water filling interface 15 is higher than the water surface of the water storage container 10, for example, 30 cm higher;

[0100] S23: Open the water filling switch valve 13, and in some embodiments, also close the reflux switch valve 19;

[0101] S24: Control the pressurizing subsystem 2 to increase the pressure until water flows out of the water filling interface 15; specifically: control the pressurizing subsystem 2 to increase the pressure at a third preset speed. When water flows out of the water filling interface 15, maintain the pressure until water flows out of the water filling interface 15 within the first preset time period, indicating that the air in the pipeline of the water filling system has been exhausted;

[0102] S25: Close the water filling switch valve 13, and the pre-water filling ends. Next, implement the water filling step according to the process. (Since the water pressure output is small at this time, the water filling switch valve 13 can also not be closed, and directly dock the water filling interface 15 with the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43 during the water filling step).

[0103] In some embodiments, in a conventional environment, when there is gas inside the main pipeline 40 of the differential pressure transmitter system 4 and air exhausting is required, the air exhausting method of the air exhausting device further includes a drainage and air exhausting method, such as Figure 7 As shown, the drainage and air exhausting method includes the following steps:

[0104] S31: Before accessing the differential pressure transmitter system 4, ensure that the water temperature inside the differential pressure transmitter system 4 is less than or equal to 120 °C, confirm that the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43 of the differential pressure transmitter 41 in the differential pressure transmitter system 4 is in the closed state, and confirm that the drainage switch valve 33 is in the closed state;

[0105] S32: Adjust the pressure reducing device 32 and adjust the pressure reducing device 32 to the minimum output pressure;

[0106] S33: Adjust the regulating device 34 and adjust the flow rate to the minimum;

[0107] S34: Connect the drain interface 30 to the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43;

[0108] S35: Open the drain switch valve 33, and open the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, so that the water in the main pipeline 40 is discharged through the high-pressure side pipeline 42 or the low-pressure side pipeline 43;

[0109] S36: When the liquid level in the waste water container 35 rises to the second preset liquid level, close the drain switch valve 33, and close the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 or the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, and the drainage ends.

[0110] In some embodiments, step S35 further includes: according to the pressure measured by the fourth pressure measuring element 37, confirm whether the output pressure is normal. If it is normal, adjust the regulating device 34 to increase the flow rate.

[0111] In some embodiments, only the gas in the main pipeline 40 of the differential pressure transmitter system 4 can be discharged by draining or filling water. When there is gas inside the differential pressure transmitter 41 in the differential pressure transmitter system 4 and exhaust is required, the exhaust method of the exhaust device further includes the differential pressure transmitter water filling and exhaust method. As Figure 8 shown, the differential pressure transmitter water filling and exhaust method includes the following steps:

[0112] S41: Close the high-pressure side isolation valve 44 on the high-pressure side pipeline 42 of the differential pressure transmitter 41 in the differential pressure transmitter system 4, and close the low-pressure side isolation valve 45 on the low-pressure side pipeline 43 of the differential pressure transmitter 41 in the differential pressure transmitter system 4;

[0113] S42: Open the balance valve 46 between the high-pressure side pipeline 42 and the low-pressure side pipeline 43;

[0114] S43: Open the high-pressure side exhaust valve 411 of the differential pressure transmitter 41 in the differential pressure transmitter system 4 (if the water in the differential pressure transmitter 41 is high-temperature water, wait for the water to cool down before opening the high-pressure side exhaust valve 411);

[0115] S44: Connect the water filling interface 15 of the water filling system to the low-pressure side three-way valve 48 on the low-pressure side pipeline 43 of the differential pressure transmitter 41 in the differential pressure transmitter system 4, and open the low-pressure side three-way valve 48 to connect the water filling system to the low-pressure side pipeline 43, and fill water into the low-pressure side pipeline 43 until water flows out from the high-pressure side exhaust valve 411 of the differential pressure transmitter 41, specifically, water flows out within the second preset time period;

[0116] S45: Close the high-pressure side exhaust valve 411 of the differential pressure transmitter 41, and open the low-pressure side exhaust valve 412 of the differential pressure transmitter 41 in the differential pressure transmitter system 4 (if the liquid in the differential pressure transmitter 41 is a high-temperature liquid, wait for the liquid to cool down before opening the low-pressure side exhaust valve 412);

[0117] S46: Close the low-pressure side three-way valve 48 on the low-pressure side pipeline 43, remove the water filling interface 15, connect the water filling interface 15 to the high-pressure side three-way valve 47 on the high-pressure side pipeline 42 of the differential pressure transmitter 41 in the differential pressure transmitter system 4, and open the high-pressure side three-way valve 47 to connect the water filling system to the high-pressure side pipeline 42 and fill water into the high-pressure side pipeline 42 until water flows out from the low-pressure side exhaust valve 412 of the differential pressure transmitter 41, specifically, water flows out within the second preset time period;

[0118] S47: Close the low-pressure side exhaust valve 412 of the differential pressure transmitter 41, close the high-pressure side three-way valve 47 on the high-pressure side pipeline 42, close the balance valve 46 between the high-pressure side pipeline 42 and the low-pressure side pipeline 43, reopen the high-pressure side isolation valve 44 on the high-pressure side pipeline 42, and reopen the low-pressure side isolation valve 45 on the low-pressure side pipeline 43. The water filling is completed.

[0119] It should be noted here that the differential pressure transmitter 41 can be exhausted by first connecting to the high-pressure side pipeline 42 or by first connecting to the low-pressure side pipeline 43. The order is not limited here.

[0120] It can be understood that the above embodiments only represent some implementation manners of the present invention, and the description is relatively specific and detailed, but it cannot be construed as a limitation to the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention, that is, the embodiments described in "in some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An exhaust device, characterized in that, It includes a water filling system, and the water filling system includes a water filling auxiliary subsystem (1) and a pressurizing subsystem (2) for pressurizing water. The water filling auxiliary subsystem (1) includes a water storage container (10), a water outlet interface (11), a water inlet interface (12), a water filling switch valve (13), a check valve (14), and a water filling interface (15). The first end of the water outlet interface (11) is communicated with the water storage container (10), the second end of the water outlet interface (11) and the first end of the water inlet interface (12) are respectively connected to the pressurizing subsystem (2), the second end of the water inlet interface (12) is connected to the water filling interface (15) through the water filling switch valve (13) and the check valve (14), and the conduction direction of the check valve (14) is towards the water filling interface (15); the water filling interface (15) is used for externally connecting a differential pressure transmitter system (4).

2. The exhaust device according to claim 1, characterized in that, The water filling auxiliary subsystem (1) further includes a safety valve (16). The first end of the safety valve (16) is connected to the pipeline between the water filling switch valve (13) and the check valve (14), and the second end of the safety valve (16) is connected to the water storage container (10).

3. The exhaust device according to claim 1, wherein, The water filling auxiliary subsystem (1) further includes a first pressure measuring element (17) and a second pressure measuring element (18). The first pressure measuring element (17) is connected to the pipeline between the check valve (14) and the water filling interface (15); the second pressure measuring element (18) is connected to the pipeline between the second end of the water inlet interface (12) and the water filling switch valve (13).

4. The exhaust device according to claim 1, characterized in that, The pressurizing subsystem (2) includes a water input port (20), a water output port (21), a gas-driven hydraulic pump (22), and an air compressor (23) for driving the gas-driven hydraulic pump (22) to pressurize water. The first end of the water input port (20) is connected to the second end of the water outlet interface (11), the second end of the water input port (20) is communicated with the inlet of the gas-driven hydraulic pump (22), the outlet of the gas-driven hydraulic pump (22) is connected to the first end of the water output port (21), and the second end of the water output port (21) is connected to the first end of the water inlet interface (12).

5. The exhaust device according to claim 1, characterized in that, The exhaust device further includes a drainage system (3), and the drainage system (3) includes a drainage interface (30), a heat dissipation device (31) for cooling water, a pressure reducing device (32) for reducing the pressure of water, a drainage switch valve (33), an adjusting device (34) for adjusting the water flow rate, and a waste water container (35) connected in sequence.

6. The exhaust device according to claim 5, characterized in that, The drainage system (3) further includes a third pressure measuring element (36) and a fourth pressure measuring element (37), the third pressure measuring element (36) is connected to the pipeline between the drainage interface (30) and the heat dissipation device (31), and the fourth pressure measuring element (37) is connected to the pipeline between the drainage switch valve (33) and the adjusting device (34).

7. An exhaust method for the exhaust device according to any one of claims 1-6, characterized in that, Applied to the differential pressure transmitter system (4), the exhaust method of the exhaust device includes a method for filling and exhausting water from the system pipeline, and the method for filling and exhausting water from the system pipeline includes a water filling step, and the water filling step includes: Connect the water filling interface (15) to the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43) of the differential pressure transmitter (41) in the differential pressure transmitter system (4); Open the water filling switch valve (13), and open the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43); Control the booster subsystem (2) to increase the pressure; When the liquid level in the water storage container (10) drops to the first preset liquid level, control the booster subsystem (2) to depressurize; Close the water filling switch valve (13), close the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43), and the water filling ends.

8. The exhaust method of the exhaust device according to claim 7, characterized in that, The method for filling and exhausting water from the system pipeline further includes a pre-water filling step, and the pre-water filling step includes: Connect the water filling auxiliary subsystem (1) and the booster subsystem (2), and add water to the water storage container (10); Fix the water filling interface (15) at a position higher than the water surface of the water storage container (10); Open the water filling switch valve (13); Control the booster subsystem (2) to increase the pressure until water flows out of the water filling interface (15); Close the water filling switch valve (13), and the pre-water filling ends.

9. The exhaust method of the exhaust device according to claim 7, characterized in that, The exhaust device further includes the drainage system (3), and the exhaust method of the exhaust device further includes a drainage and exhaust method, and the drainage and exhaust method includes the following steps: Before accessing the differential pressure transmitter system (4), confirm that the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43) of the differential pressure transmitter (41) in the differential pressure transmitter system (4) is in the closed state, and confirm that the drainage switch valve (33) is in the closed state; Adjust the pressure reducing device (32) and adjust the pressure reducing device (32) to the minimum output pressure; Adjust the regulating device (34) and adjust the flow rate to the minimum; Connect the drainage interface (30) to the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43); Open the drainage switch valve (33), and open the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43); When the liquid level in the waste water container (35) rises to the second preset liquid level, close the drainage switch valve (33), close the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) or the low-pressure side three-way valve (48) on the low-pressure side pipeline (43), and the drainage ends.

10. The exhaust method of the exhaust device according to claim 7, characterized in that, The exhaust method of the exhaust device further includes a water filling and exhaust method for the differential pressure transmitter, and the water filling and exhaust method for the differential pressure transmitter includes the following steps: Close the high-pressure side isolation valve (44) on the high-pressure side pipeline (42) of the differential pressure transmitter (41) in the differential pressure transmitter system (4), and close the low-pressure side isolation valve (45) on the low-pressure side pipeline (43) of the differential pressure transmitter (41) in the differential pressure transmitter system (4); Open the balance valve (46) between the high-pressure side pipeline (42) and the low-pressure side pipeline (43); Open the high-pressure side exhaust valve (411) of the differential pressure transmitter (41) in the differential pressure transmitter system (4); Connect the water filling interface (15) to the low-pressure side three-way valve (48) on the low-pressure side pipeline (43) of the differential pressure transmitter (41) in the differential pressure transmitter system (4), and open the low-pressure side three-way valve (48) to fill water into the low-pressure side pipeline (43) until water flows out from the high-pressure side exhaust valve (411) of the differential pressure transmitter (41); Close the high-pressure side exhaust valve (411) of the differential pressure transmitter (41), and open the low-pressure side exhaust valve (412) of the differential pressure transmitter (41) in the differential pressure transmitter system (4); Close the low-pressure side three-way valve (48) on the low-pressure side pipeline (43), remove the water filling interface (15), connect the water filling interface (15) to the high-pressure side three-way valve (47) on the high-pressure side pipeline (42) of the differential pressure transmitter (41) in the differential pressure transmitter system (4), and open the high-pressure side three-way valve (47) until water flows out from the low-pressure side exhaust valve (412) of the differential pressure transmitter (41); Close the low-pressure side exhaust valve (412) of the differential pressure transmitter (41), close the high-pressure side three-way valve (47) on the high-pressure side pipeline (42), close the balance valve (46) between the high-pressure side pipeline (42) and the low-pressure side pipeline (43), reopen the high-pressure side isolation valve (44) on the high-pressure side pipeline (42), and reopen the low-pressure side isolation valve (45) on the low-pressure side pipeline (43), and the water filling is completed.

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