Portable mobile dosing device for nuclear power station

Abstract

The utility model discloses a portable mobile dosing device for a nuclear power station. The portable mobile dosing device comprises a mobile trolley; the weighing assembly is arranged on the moving trolley; the dosing box is arranged on the weighing assembly, and a containing cavity used for storing liquid medicine and a medicine outlet communicated with the containing cavity are formed in the dosing box; the power pump is arranged on the moving trolley, one end of the power pump is communicated with the pesticide outlet, and the power pump is used for providing power to pump out pesticide liquid in the pesticide adding box; a pressure gauge is mounted at the other end of the power pump and used for monitoring the pressure of an outlet of the power pump; and the injection pipeline is communicated with the other end of the power pump and is used for injecting the liquid medicine pumped out by the power pump into the system to be added with the medicine. According to the embodiment of the utility model, the dosing device is movable, so that the cost is saved; accurate proportioning of liquid medicine is achieved through the weighing assembly, and the success rate of medicine adding is increased; meanwhile, the device is convenient, safe and reliable, the problems of pipe explosion and water leakage are effectively avoided, and the safety of operators is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant chemical medicine addition technical field, especially nuclear power station portable mobile dosing device. BACKGROUND

[0002] When wet maintenance of the steam generator is carried out, the ASG system (emergency water supply system) usually provides desalted water, and the dosing system provides ammonia water and hydrazine, which are then injected into the steam generator. However, since the dosing system is currently unavailable, the steam generator cannot be directly configured and filled with wet maintenance liquid (the liquid is composed of ammonia water, hydrazine and desalted water in a specific ratio). In the face of this situation, the ammonia water and hydrazine can only be added to the ASG water tank manually, and after stirring evenly, the mixed liquid is injected into the steam generator through the ASG system.

[0003] However, ammonia water has strong volatility and a pungent odor, which may cause ammonia gas diffusion during manual dosing into the ASG water tank, and the pungent odor may spread to most areas of the safety plant through the ventilation system, adversely affecting the operating environment of the operator, causing the operator to be unable to work normally, and there is a certain industrial risk. At the same time, since the dosing device cannot be moved, each dosing device needs to be equipped with a fixed dosing device for each dosing device in the nuclear power plant, which requires more manpower and greatly increases the production cost. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a kind of nuclear power station portable mobile dosing device, to solve the problems that manual dosing mode of prior art causes operator to be unable to work normally and requires more manpower.

[0005] The utility model provides a kind of nuclear power station portable mobile dosing device, it includes:

[0006] A weighing assembly is arranged on the mobile trolley.

[0007] A dosing tank is arranged on the weighing assembly, and the dosing tank is provided with a containing cavity for storing liquid medicine and a medicine outlet opening communicated with the containing cavity.

[0008] A power pump is arranged on the mobile trolley, one end of the power pump is communicated with the medicine outlet opening, and the power pump is used to provide power to pump out the liquid medicine in the dosing tank. The other end of the power pump is provided with a pressure gauge for monitoring the pressure of the outlet of the power pump.

[0009] An injection pipeline is communicated with the other end of the power pump, and is used to inject the liquid medicine pumped out by the power pump into the dosing system.

[0010] Optionally, the other end of the power pump is further provided with an exhaust pipeline, which is located between the pressure gauge and the injection pipeline, and is used for exhausting air.

[0011] Optionally, a control valve is arranged between the exhaust pipeline and the other end of the power pump.

[0012] Optionally, a check valve is arranged between the pressure gauge and the exhaust pipeline.

[0013] Optionally, a plurality of dosing tanks are arranged, and each of the dosing outlets is in communication with one end of the power pump.

[0014] Optionally, a communication valve is arranged between each of the dosing tanks and one end of the power pump, and the communication valve has a plurality of inlets in communication with each of the dosing outlets and one outlet in communication with one end of the power pump.

[0015] Optionally, a filter is arranged between each of the dosing tanks and the communication valve.

[0016] Optionally, the filter is a screen filter.

[0017] Optionally, a plurality of weighing assemblies are arranged, and each of the dosing tanks is arranged on a corresponding weighing assembly.

[0018] Optionally, the power pump is a plunger metering pump.

[0019] The utility model discloses a portable mobile dosing device of nuclear power station, which comprises a mobile trolley, a weighing assembly arranged on the mobile trolley, a dosing tank arranged on the weighing assembly, a containing cavity for storing liquid medicine and a dosing outlet in communication with the containing cavity arranged on the dosing tank, a power pump arranged on the mobile trolley, one end of the power pump in communication with the dosing outlet, the power pump being used for providing power to pump out the liquid medicine in the dosing tank, the other end of the power pump being provided with a pressure gauge for monitoring the pressure of the outlet of the power pump, and an injection pipeline in communication with the other end of the power pump for injecting the liquid medicine pumped out by the power pump into a system to be dosed. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure diagram of the portable mobile dosing device for nuclear power plant is provided.

[0022] The identification in the figure is:

[0023] 100, mobile trolley; 200, weighing assembly; 300, dosing box; 301, containing cavity; 302, medicine outlet; 400, power pump; 500, pressure gauge; 600, injection pipeline; 700, exhaust pipeline; 800, control valve; 900, check valve; 1000, communication valve; 2000, filter. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0025] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0026] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0028] Please refer to Figure 1The embodiment of the present application provides a portable mobile dosing device for a nuclear power plant, which comprises a mobile trolley 100, a weighing assembly 200 arranged on the mobile trolley 100, a dosing box 300 arranged on the weighing assembly 200, wherein the dosing box 300 is provided with a containing cavity 301 for storing liquid medicine and a medicine outlet 302 communicating with the containing cavity 301, a power pump 400 arranged on the mobile trolley 100, wherein one end of the power pump 400 communicates with the medicine outlet 302, and the power pump 400 is used for providing power to pump out the liquid medicine in the dosing box 300, a pressure gauge 500 installed at the other end of the power pump 400 and used for monitoring the pressure of the outlet of the power pump 400, and an injection pipeline 600 communicating with the other end of the power pump 400 and used for injecting the liquid medicine pumped out by the power pump 400 into a system to be dosed.

[0029] In the embodiment, the bottom of the dosing box 300 is configured with the weighing assembly 200 (the weighing assembly 200 can be an electronic scale), the electronic scale is used for calculating the weight of the chemical medicine before being injected into the system to be dosed, then the concentration is matched according to the calculated weight, the dosing amount is accurately controlled, the over-dosing or under-dosing situation is avoided, and precise matching is realized. The pressure gauge 500 monitors the pressure of the outlet of the power pump 400 in real time, which helps the operator to know the pressure change in the liquid medicine conveying process in time, and ensures the stability and safety of the conveying process. The mobile trolley 100 allows the dosing device to be flexibly moved inside the nuclear power plant system to reach the specified position where the liquid medicine needs to be added.

[0030] In summary, the design of the mobile trolley 100 makes the device flexible to move inside the nuclear power plant, greatly improving the convenience of operation; the weighing assembly 200 and the pressure gauge 500 ensure the accurate control of the dosing amount and the stability of the conveying process, avoid the problems of pipe explosion or water leakage, and ensure the safety of the operator during the dosing process; at the same time, the number of fixed dosing devices is greatly reduced, and the cost is saved.

[0031] It should be noted that the material and structure of the dosing box 300 are corrosion-resistant and easy to clean, which ensures the purity of the liquid medicine and the long-term stable operation of the system. The mobile trolley 100 can be used in various systems of the nuclear power plant, such as RCV (chemical and volume control system), RRI (equipment cooling water system), ASG (emergency water supply system), ASP (secondary side passive residual heat removal system), DEL (safety refrigeration water system), DER (operating refrigeration water system) and conventional island system.

[0032] Further, the other end of the power pump 400 is also provided with an exhaust pipeline 700, which is located between the pressure gauge 500 and the injection pipeline 600, and is used to exhaust air. In the embodiment, during the delivery of the liquid medicine, air may be mixed due to the injection of the liquid medicine and the arrangement of the injection pipeline 600. The entry of the air into the system to be medicated may cause the performance of the system to be degraded, the equipment to be damaged, and even a safety accident to occur. The arrangement of the exhaust pipeline 700 can effectively exhaust the air, avoid the air entering the system to be medicated along the injection pipeline, and effectively avoid potential risks.

[0033] Further, a control valve 800 is arranged between the exhaust pipeline 700 and the other end of the power pump 400. In the embodiment, a suitable control valve 800 or adjusting device should be arranged between the exhaust pipeline 700 and the other end of the power pump 400, so that the exhaust pipeline 700 can be flexibly opened or closed, and the exhaust of the air can be controlled according to actual needs. Specifically, when the exhaust pipeline 700 is closed, the control valve 800 can effectively prevent the liquid medicine from leaking to the outside environment (outside the mobile trolley 100) through the exhaust pipeline 700, and protect the environment and the safety of the operator.

[0034] Further, a check valve 900 is arranged between the pressure gauge 500 and the exhaust pipeline 700. In the embodiment, the main purpose of the arrangement of the check valve 900 is to prevent the liquid medicine in the system from leaking to the outside of the mobile trolley 100 from the exhaust pipeline 700.

[0035] Specifically, during the delivery of the liquid medicine, when the liquid medicine is output from the power pump 400 and passes through the pressure gauge 500, if the pressure is large enough to overcome the opening pressure of the check valve 900, the liquid medicine will continue to flow to the injection pipeline 600 and be delivered to the system to be medicated; and if the flow direction of the liquid medicine is reversed (for example, the power pump 400 stops working or the power pump 400 fails to normally operate), the check valve 900 can prevent the liquid medicine from leaking to the outside environment through the exhaust pipeline 700, and also prevent the liquid medicine in the system to be medicated from flowing back.

[0036] In an embodiment, a plurality of medicating boxes 300 are arranged, and each medicine outlet 302 is in communication with one end of the power pump 400. In the embodiment, the plurality of medicating boxes 300 can carry more liquid medicine, reduce the frequency of replenishing the liquid medicine, and improve the work efficiency; at the same time, the plurality of medicating boxes 300 can also load different types of liquid medicine according to actual needs, and increase the flexibility of medicating.

[0037] Further, a communication valve 1000 is arranged between each of the dosing tanks 300 and one end of the power pump 400. The communication valve 1000 has multiple inlets respectively communicating with the dosing outlets 302 of the dosing tanks 300 and one outlet communicating with one end of the power pump 400. In the embodiment, two dosing tanks 300 are arranged, and the communication valve 1000 is a three-way valve, which is a valve having three interfaces, two of which (inlets) respectively communicate with the dosing outlets 302 of the two dosing tanks 300, and the other one (inlet) communicates with one end of the power pump 400. By arranging the three-way valve, simultaneous control of each of the dosing tanks 300 can be achieved. When dosing, the power pump 400 is only needed to be started, and the dosing liquid in the multiple dosing tanks 300 that have been metered is all injected into the system to be dosed.

[0038] In addition, the three-way valve can be a valve that realizes selective communication, i.e., a valve having a switching function, so as to switch the dosing tanks 300 connected, for example, the three-way valve includes two inlets and one outlet, and then one of the inlets and the outlet can be selectively communicated, while the other inlet is disconnected; or the other inlet and the outlet are selectively communicated, while one inlet is disconnected; in this way, the three-way valve itself can realize adjustment of the dosing liquid addition sequence of different dosing tanks 300 to meet specific dosing requirements, and at the same time, the problem of easy air mixing when the dosing liquid weights of different dosing tanks 300 are different can be avoided. Therefore, during the dosing liquid delivery process, the interface connected with the dosing outlet 302 of a certain dosing tank 300 can be selectively opened or closed according to actual needs, so as to control the dosing liquid extraction from which dosing tank 300.

[0039] In addition, compared with multiple independent valves, the design of the three-way valve greatly simplifies the pipeline layout, making the entire dosing device more compact and easy to maintain.

[0040] Further, a filter 2000 is arranged between each of the dosing tanks 300 and the communication valve 1000. In the embodiment, since the quality requirements of the dosing liquid of the nuclear power plant are extremely high, any small impurities can cause adverse effects on the normal operation of the equipment. Therefore, the filter 2000 needs to be arranged between each of the dosing tanks 300 and the communication valve 1000. The main function of the filter 2000 is to remove impurities and particulate matters in the dosing liquid, to ensure that no foreign matter enters the system to be dosed, and at the same time, to ensure the purity and quality of the dosing liquid. During the dosing process, after the dosing liquid flows out of the dosing tank 300, it is first filtered by the filter 2000, and then flows to the power pump 400 through the communication valve 1000, and finally, the filtered dosing liquid is injected into the system to be dosed from the injection pipeline 600.

[0041] It should be noted that the filter 2000 is designed to be detachable and washable, which is convenient for maintenance and replacement during use. When the filter 2000 is clogged or reaches the replacement period, it can be easily detached and cleaned or replaced.

[0042] Specifically, the filter 2000 is a screen filter. In the present embodiment, the screen filter adopts precise screen material, which can effectively remove impurities, particulate matter, microorganisms and the like in the chemical liquid, and ensure the purity and quality of the chemical liquid. The screen filter has higher filtering effect, which can meet the strict requirements of nuclear power plants on the quality of chemical liquid, and is suitable for various types of chemical liquid.

[0043] In addition, the structure design of the screen filter is relatively simple, and easy to install and maintain. During use, when the screen is blocked or reaches the replacement period, the screen can be conveniently removed for cleaning or replacement, to ensure the continuous and effective work of the filter 2000.

[0044] Further, the weighing assembly 200 is provided in plurality, and each chemical feeding tank 300 is arranged on a corresponding weighing assembly 200. In the present embodiment, the weighing assembly 200 is designed in plurality, and the number thereof matches the number of the chemical feeding tanks 300. Each chemical feeding tank 300 is correspondingly arranged on a weighing assembly 200, to ensure that the amount of chemical liquid of each chemical feeding tank 300 can be independently and accurately measured. The weighing assembly 200 adopts high-precision sensors and measurement technology, which can measure the weight of the chemical liquid of each chemical feeding tank 300 in real time and accurately. In addition, the weighing assembly 200 is also equipped with a display screen or a digital interface, which can display the weight of the chemical liquid of each chemical feeding tank 300 in real time. In this way, the operator can intuitively understand the state of each chemical feeding tank 300, so as to timely add chemicals or adjust.

[0045] Specifically, the power pump 400 is a plunger metering pump. In the present embodiment, the plunger metering pump plays an important role in the chemical feeding system of the nuclear power plant due to its high precision and high reliability, and wide flow adjustment range. The maximum flow of the plunger metering pump is 500L / h, and the flow adjustment range is 10%-100%. In addition, the outlet pressure of the plunger metering pump can be as high as 2.0MPa, which ensures sufficient lift, so that the plunger metering pump can overcome the resistance of the pipeline, and ensure that the chemical liquid can be smoothly delivered to the system to be fed.

[0046] In a specific embodiment, all the devices of the portable mobile dosing device of the nuclear power plant are loaded on the mobile trolley 100, and the mobile trolley 100 can meet the dosing requirements of most systems in the whole plant. Two dosing boxes 300 are arranged on the trolley, one dosing box 300 loads SED water (a solvent or diluent mixed with chemical drugs), and the other dosing box 300 loads chemical drugs. The bottom of each dosing box 300 is provided with an electronic scale for calculating the weight of the chemical drugs injected into the system to be dosed, so as to calculate the mixing concentration. The outlet 302 of each dosing box 300 is provided with a filter screen filter to prevent foreign matter from entering the system. After filtration, a three-way valve is connected between each dosing box 300 and one end of the power pump 400, and the three-way valve is used to switch the water source of the dosing box 300. The chemical drugs are delivered to the system to be dosed by the plunger metering pump, a pressure gauge 500 is installed at the outlet of the plunger metering pump for pressure monitoring, and an exhaust pipeline 700 is also installed at the outlet of the plunger metering pump. Before use, the valve of the control valve 800 on the exhaust pipeline 700 can be opened to exhaust air to prevent air from being injected into the system to be dosed.

[0047] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0048] It should also be noted that in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive.

[0049] include, so that the process, method, article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.

Claims

1. A portable mobile dosing device for a nuclear power plant, characterized in that, The application relates to a mobile trolley for adding liquid medicine, comprising: a mobile trolley; a weighing assembly arranged on the mobile trolley; a medicine adding box arranged on the weighing assembly, the medicine adding box being provided with a containing cavity for storing liquid medicine and a medicine outlet communicating with the containing cavity; a power pump arranged on the mobile trolley, one end of the power pump communicating with the medicine outlet, the power pump being used for providing power to pump out the liquid medicine in the medicine adding box; the other end of the power pump is provided with a pressure gauge for monitoring the pressure of the outlet of the power pump; an injection pipeline communicating with the other end of the power pump, the injection pipeline being used for injecting the liquid medicine pumped out by the power pump into a system to be added with medicine.

2. The portable mobile reagent feeder for nuclear power plants according to claim 1, characterized in that, the other end of the power pump is further provided with an exhaust pipeline, the exhaust pipeline being located between the pressure gauge and the injection pipeline, and the exhaust pipeline being used for exhausting air.

3. The portable mobile chemical addition device for a nuclear power plant of claim 2, wherein, a control valve is arranged between the other end of the power pump and the exhaust pipeline.

4. The portable mobile chemical addition device for a nuclear power plant of claim 2, wherein, a check valve is arranged between the pressure gauge and the exhaust pipeline.

5. The portable mobile chemical addition device for a nuclear power plant of claim 1, wherein, a plurality of medicine adding boxes are arranged, and each medicine outlet communicates with one end of the power pump.

6. The portable mobile chemical addition device for a nuclear power plant of claim 5, wherein, a communication valve is arranged between each medicine adding box and one end of the power pump, the communication valve having a plurality of inlets respectively communicating with each medicine outlet and one outlet communicating with one end of the power pump.

7. The portable mobile chemical addition device for a nuclear power plant of claim 6, wherein, a filter is arranged between each medicine adding box and the communication valve.

8. The portable mobile chemical addition device for a nuclear power plant of claim 7, wherein, the filter is a screen filter.

9. The portable mobile chemical addition device for a nuclear power plant of claim 5, wherein, a plurality of weighing assemblies are arranged, and each medicine adding box is arranged on a corresponding weighing assembly.

10. The portable mobile reagent feeder for nuclear power plants according to claim 1, characterized in that, the power pump is a plunger metering pump.

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