Portable dosing device for nuclear power plant

Abstract

The utility model discloses a nuclear power plant portable dosing device which comprises a gas cylinder, a pressure regulating assembly, a liquid storage bottle, a gas conveying pipe and a liquid outlet pipe, a valve is arranged on the gas cylinder, the pressure regulating assembly comprises a pressure regulating valve, a gas inlet connector of the pressure regulating valve is connected with a gas outlet connector of the valve, and a first pressure gauge is further arranged on the pressure regulating valve; the liquid storage bottle is used for storing chemical agents and provided with a first connector and a second connector, the first end of the gas conveying pipe is connected with the gas outlet connector of the pressure regulating valve, the second end of the gas conveying pipe is connected with the first connector, and one end of the liquid outlet pipe is used for being connected with the second connector. The device can be used in industrial production of a nuclear power plant, a thermal power plant and the like, and for systems and equipment which are not provided with official dosing devices, the portable dosing device of the nuclear power plant can efficiently complete dosing operation when temporary dosing needs exist. The system can be shared by a plurality of system devices and applied in multiple scenes, so that the construction and equipment operation and maintenance cost for configuring a special dosing device is greatly saved. The operation is simple, and the transportation and storage are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a portable chemical dosing device for nuclear power plants. Background Art

[0002] The function of the steam generator (SG) of a pressurized water reactor nuclear power plant is to exchange heat with the primary loop and continuously remove the heat generated by the fission reaction of the core fuel in the primary loop. The steam generator is an important safety device. To ensure safety, an independent auxiliary feed water system (ASG) must be configured to supply qualified demineralized water to the steam generator (SG) of the pressurized water reactor nuclear power plant in case of emergency to ensure the safety of the unit, or to supply wet maintenance liquid to the steam generator (SG) of the pressurized water reactor nuclear power plant during the major overhaul of the unit to ensure that the steam generator (SG) equipment of the pressurized water reactor nuclear power plant does not corrode during the outage of the major overhaul. In the nuclear power units of the related technology, the original design of the auxiliary feed water system (ASG) has three pools connected to the atmosphere. Each pool is required to maintain the pH value in the range of 8.5 - 10. During the operation of the unit at rated power, the water stored in the auxiliary feed water system (ASG) is not used and will not be replaced, and it needs to be stored for about 18 months. Due to being connected to the atmosphere, there is a problem of carbonation of the water quality caused by absorbing carbon dioxide, resulting in the pH value dropping and not meeting the requirements. As the pH value decreases, it will be conducive to the growth of bacteria, which will inevitably pose a safety hazard to the water used in the steam generator (SG) of the pressurized water reactor nuclear power plant.

[0003] The auxiliary feed water system (ASG) is not designed with a fixed formal chemical dosing device, and the system is airtight. Only the overflow port is connected to the atmosphere and it is impossible to directly add chemicals to the water tank. Other methods need to be thought of to carry out chemical dosing. Each unit has 3 water tanks of the auxiliary feed water system (ASG). According to the current plan, each nuclear power plant basically has 6 units, but the chemical dosing frequency is not high, so no formal chemical dosing pipelines and equipment are designed. According to the existing experience, ammonia water needs to be replenished 1 - 2 times every 18 months. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a portable chemical dosing device for nuclear power plants.

[0005] The technical solution adopted by the utility model to solve its technical problem is to construct a portable chemical dosing device for nuclear power plants, which includes a gas cylinder, a pressure regulating component, a liquid storage bottle, an air delivery pipe and a liquid outlet pipe. A valve is provided on the gas cylinder. The pressure regulating component includes a pressure regulating valve. The air inlet interface of the pressure regulating valve is connected to the air outlet interface of the valve. At least one first pressure gauge is also provided on the pressure regulating valve.

[0006] The liquid storage bottle is used to store chemical agents. A first interface and a second interface are provided on the liquid storage bottle. The first end of the air delivery pipe is connected to the air outlet interface of the pressure regulating valve, the second end of the air delivery pipe is connected to the first interface, and one end of the liquid outlet pipe is used to be connected to the second interface.

[0007] In some embodiments, a liquid guide tube is further disposed in the inner cavity of the liquid storage bottle. One end of the liquid guide tube is connected to the second interface, and the other end of the liquid guide tube extends to the bottom of the inner cavity of the liquid storage bottle.

[0008] In some embodiments, a pair of handles are further provided on the liquid storage bottle.

[0009] In some embodiments, the liquid storage bottle includes a bottle body having a liquid injection port with an upward opening;

[0010] The liquid storage bottle further includes a bottle cap for sealing the liquid injection port.

[0011] In some embodiments, the bottle cap includes a cap body, and at least one second pressure gauge and / or at least one pressure relief valve are provided on the cap body.

[0012] In some embodiments, a limiting member for fastening the cap body to the bottle body is further provided on the cap body.

[0013] In some embodiments, a first mounting plate and a second mounting plate are relatively parallel and spaced on the cap body. A first mounting hole is provided on the first mounting plate, and a second mounting hole is provided on the second mounting plate;

[0014] The limiting member includes a first rod portion, a second rod portion, a third rod portion, a fourth rod portion, a fifth rod portion, a sixth rod portion, and a U-shaped portion;

[0015] The first rod portion passes through the first mounting hole. The second rod portion is vertically connected to the first end of the first rod portion, and the third rod portion is vertically connected to the second end of the first rod portion, and the second rod portion and the third rod portion are vertically connected in space;

[0016] The fourth rod portion passes through the second mounting hole. The fifth rod portion is vertically connected to the first end of the fourth rod portion, and the sixth rod portion is vertically connected to the second end of the fourth rod portion, and the fifth rod portion and the sixth rod portion are vertically connected in space; the first rod portion and the fourth rod portion are coaxially arranged. The second rod portion and the fifth rod portion are arranged parallel to each other and both extend downward, and the third rod portion and the sixth rod portion are arranged parallel to each other;

[0017] The two open ends of the U-shaped portion are respectively connected to the end of the third rod portion away from the first rod portion and the end of the sixth rod portion away from the fourth rod portion, and the U-shaped portion extends obliquely downward.

[0018] In some embodiments, a sealing ring is provided between the cap body and the inner wall surface of the liquid injection port.

[0019] In some embodiments, a quick connector is provided at the first end and / or the second end of the gas pipeline.

[0020] In some embodiments, a handle is provided on the gas cylinder.

[0021] Implementing the present utility model has the following beneficial effects: The portable chemical dosing device for nuclear power plants can be used in industrial production such as nuclear power plants and thermal power plants. For systems and equipment without a formal chemical dosing device, when there is a temporary chemical dosing requirement, the portable chemical dosing device for nuclear power plants can efficiently complete the chemical dosing operation. It can be shared by multiple system devices and applied in multiple scenarios, greatly saving the construction and equipment operation and maintenance costs of configuring dedicated chemical dosing devices. It is simple to operate, convenient for transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:

[0023] Figure 1 is a schematic structural diagram of a portable chemical dosing device for a nuclear power plant in some embodiments of the present utility model;

[0024] Figure 2 is an exploded view of a portable chemical dosing device for a nuclear power plant in some embodiments of the present utility model;

[0025] Figure 3 is a cross-sectional view of a portable chemical dosing device for a nuclear power plant in some embodiments of the present utility model;

[0026] Figure 4 is a schematic structural diagram of a bottle cap in some embodiments of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are constructed and operated in a specific orientation, only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When one component is referred to as "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. Terms such as "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the following description, for purposes of illustration and not limitation, specific details such as specific system architectures, technologies, etc. are set forth in order to provide a thorough understanding of embodiments of the present utility model. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to impede the description of the present utility model with unnecessary details.

[0030] Please refer to Figures 1 to 3 , in view of the situation that multiple water tanks in a nuclear power plant need to be dosed but the usage frequency is not high, therefore, the present utility model discloses a portable dosing device for a nuclear power plant, which is applicable to all system equipment that needs to add liquid reagents.

[0031] The portable dosing device for a nuclear power plant may include a gas cylinder 10, a pressure regulating assembly 20, a liquid storage bottle 30, a gas transmission pipe 40, and a liquid outlet pipe 50. A valve 11 is provided on the gas cylinder 10. The pressure regulating assembly 20 includes a pressure regulating valve 21. The air inlet interface of the pressure regulating valve 21 is connected to the air outlet interface of the valve 11. At least one first pressure gauge 22 is further provided on the pressure regulating valve 21. The number of the first pressure gauges 22 can be one, two, or any other number, preferably one or two. When two first pressure gauges 22 are provided, the monitoring accuracy can be improved.

[0032] The liquid storage bottle 30 is used to store chemical agents. A first interface 33 and a second interface 34 are provided on the liquid storage bottle 30. The first end of the gas transmission pipe 40 is connected to the air outlet interface of the pressure regulating valve 21, and the second end of the gas transmission pipe 40 is connected to the first interface 33. One end of the liquid outlet pipe 50 is used to be connected to the second interface 34. The chemical agents include, but are not limited to, ammonia water and boric acid water.

[0033] In some embodiments, the gas cylinder 10 may be generally cylindrical in structure, and a handle 12 is provided on the gas cylinder 10 for easy carrying. The gas cylinder 10 may be, including but not limited to, a high-pressure gas cylinder. The high-pressure gas cylinder may be a standard gas cylinder that can withstand a pressure of 15 MPa. A suitable gas medium, such as compressed air, oxygen, inert gas, etc., is selected according to the dosing system and reagents to be added. The function of the high-pressure gas cylinder is to provide sufficient air pressure to the liquid storage bottle 30 to obtain sufficient power for dosing the dosing system to be added.

[0034] In some embodiments, the pressure regulating assembly 20 is detachably connected to the gas cylinder 10 for easy assembly and storage. The pressure regulating assembly 20 is used for pressure control and adjustment. Different pressure requirements are controlled through the pressure regulating valve 21, the first pressure gauge 22, and the gas transmission pipe 40 of the pressure regulating assembly 20. In actual work, the pressure of the high-pressure gas cylinder is selected according to the pressure of the dosing system to be added, and a stable output pressure is maintained through the pressure regulating valve 21 and the first pressure gauge 22 to meet the dosing requirements of different systems. When regulating the pressure, the pressure-bearing capacity of the liquid storage bottle 30 and the pressure regulating assembly 20 needs to be considered. In some embodiments, the gas transmission pipe 40 may be a metal hose, and quick connectors are provided at the first end and / or the second end of the gas transmission pipe 40, that is, quick connectors may be provided at one end or both ends of the gas transmission pipe 40 for easy and quick connection of the air outlet interface of the pressure regulating valve 21 and the first interface 33. The air outlet interface of the pressure regulating valve 21 and the first interface 33 may both be quick interfaces.

[0035] In some embodiments, a liquid guide pipe 35 is further provided in the inner cavity of the liquid storage bottle 30. One end of the liquid guide pipe 35 is connected to the second interface 34, and the other end of the liquid guide pipe 35 extends to the bottom of the inner cavity of the liquid storage bottle 30, so that the chemical agent in the liquid storage bottle 30 can be output as much as possible. The liquid guide pipe 35 may be a metal hose or a plastic hose.

[0036] In some embodiments, a pair of handles 36 are further provided on the liquid storage bottle 30 for easy carrying and handling of the liquid storage bottle 30. The handles 36 may be generally U-shaped, C-shaped, etc.

[0037] Refer to Figures 2 to 4 In some embodiments, the liquid storage bottle 30 includes a bottle body 31. The bottle body 31 is generally cylindrical in structure. The bottle body 31 has a liquid injection port 311 with an upward opening (see Figure 2 ), and the liquid storage bottle 30 further includes a bottle cap 32 for sealing the liquid injection port 311.

[0038] Refer to Figure 4, in some embodiments, the bottle cap 32 includes a cap body 321, on which at least one second pressure gauge 322 and / or at least one pressure relief valve 323 are provided. The pressure relief valve 323 can relieve the pressure of the liquid storage bottle 30 so that the pressure in the liquid storage bottle 30 meets the requirements.

[0039] Furthermore, a limiting member 324 for fastening the cap body 321 to the bottle body 31 is also provided on the cap body 321.

[0040] A first mounting plate 325 and a second mounting plate 326 are provided on the cap body 321 relatively parallel and spaced apart. A first mounting hole 3251 is provided on the first mounting plate 325, and a second mounting hole 3261 is provided on the second mounting plate 326. The limiting member 324 includes a first rod portion 3241, a second rod portion 3242, a third rod portion 3243, a fourth rod portion 3244, a fifth rod portion 3245, a sixth rod portion 3246, and a U-shaped portion 3247.

[0041] The first rod portion 3241 passes through the first mounting hole 3251. The second rod portion 3242 is vertically connected to the first end of the first rod portion 3241. The third rod portion 3243 is vertically connected to the second end of the first rod portion 3241, and the second rod portion 3242 and the third rod portion 3243 are vertically connected in space.

[0042] The fourth rod portion 3244 passes through the second mounting hole 3261. The fifth rod portion 3245 is vertically connected to the first end of the fourth rod portion 3244. The sixth rod portion 3246 is vertically connected to the second end of the fourth rod portion 3244, and the fifth rod portion 3245 and the sixth rod portion 3246 are vertically connected in space; the first rod portion 3241 and the fourth rod portion 3244 are coaxially arranged. The second rod portion 3242 and the fifth rod portion 3245 are arranged parallel to each other and both extend downward. The third rod portion 3243 and the sixth rod portion 3246 are arranged parallel to each other.

[0043] The two open ends of the U-shaped portion 3247 are respectively connected to the end of the third rod portion 3243 far from the first rod portion 3241 and the end of the sixth rod portion 3246 far from the fourth rod portion 3244, and the U-shaped portion 3247 extends obliquely downward (in the direction taken as an example). Figure 4 as an example).

[0044] Wherein, when the bottle cap 32 is to be set on the liquid injection port 311 of the bottle body 31, the U-shaped part 3247 is rotated downward so that the end of the U-shaped part 3247 abuts against the outer surface of the upper part of the bottle body 31. At this time, the second rod part 3242 and the fifth rod part 3245 also abut downward against the outer surface of the upper part of the bottle body 31, and then the bottle cap 32 and the bottle body 31 are fixedly engaged. When it is necessary to remove the bottle cap 32, the U-shaped part 3247 is rotated upward so that the end of the U-shaped part 3247 leaves the outer surface of the upper part of the bottle body 31. At this time, the second rod part 3242 and the fifth rod part 3245 also leave the outer surface of the upper part of the bottle body 31 upward, and then the bottle cap 32 and the bottle body 31 can be separated. Of course, the limiting member 324 can also adopt a limiting member with other structures, which is not specifically limited here. In some other embodiments, the bottle cap 32 and the bottle body 31 can also be fixedly connected by screw connection or snap connection.

[0045] In some embodiments, a sealing ring 327 is provided between the cover body 321 and the inner wall surface of the liquid injection port 311. The sealing ring 327 can improve the sealing stability. Preferably, the sealing ring 327 can be a silica gel sealing ring.

[0046] Preferably, the liquid storage bottle 30 can be made of a metal material, and the metal material includes but is not limited to stainless steel, aluminum or aluminum alloy. Of course, the liquid storage bottle 30 can also be other metal materials or composite materials, which is not specifically limited here.

[0047] In some embodiments, the liquid outlet pipe 50 can be a metal hose or a plastic hose. One end of the liquid outlet pipe 50 can be provided with a joint or an interface to achieve detachable connection with the second interface 34.

[0048] The portable chemical dosing device for nuclear power plants is applied as follows:

[0049] When adding chemicals to the auxiliary feed water system (ASG), the liquid outlet pipe 50 can be connected to the pipeline on the water tank of the auxiliary feed water system (ASG) (this pipeline can be the instrument pipeline on the water tank), and the chemical agent in the liquid storage bottle 30 is added into the water tank of the auxiliary feed water system (ASG).

[0050] It can be understood that the portable chemical dosing device for nuclear power plants can be used in industrial production such as nuclear power plants and thermal power plants. When liquid reagents need to be replenished in closed equipment such as boxes, tanks, and pipelines, but the original design does not have the function of a formal fixed chemical dosing pipe, the addition requirements of liquid reagents can be conveniently and quickly completed.

[0051] The portable chemical dosing device for nuclear power plants has the following technical effects:

[0052] 1. For systems and equipment without a formal chemical dosing device, when there is a temporary chemical dosing requirement, the portable chemical dosing device for nuclear power plants can efficiently complete the chemical dosing operation.

[0053] 2. It can be shared by multiple system devices and applied in multiple scenarios, greatly saving the construction and equipment operation and maintenance costs of configuring dedicated dosing devices.

[0054] 3. Simple operation, convenient transportation and storage.

[0055] It can be understood that the above embodiments only express the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it cannot be construed as a limitation on 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 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; 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. A portable dosing device for a nuclear power plant, characterized in that: The invention comprises a gas cylinder (10), a pressure regulating assembly (20), a liquid storage bottle (30), a gas transmission pipe (40) and a liquid outlet pipe (50), wherein the gas cylinder (10) is provided with a valve (11), the pressure regulating assembly (20) comprises a pressure regulating valve (21), an air inlet interface of the pressure regulating valve (21) is connected to an air outlet interface of the valve (11), and the pressure regulating valve (21) is also provided with at least one first pressure gauge (22); The liquid storage bottle (30) is used to store chemical agents. A first interface (33) and a second interface (34) are provided on the liquid storage bottle (30). A first end of the gas supply pipe (40) is connected to the gas outlet interface of the pressure regulating valve (21), a second end of the gas supply pipe (40) is connected to the first interface (33), and one end of the liquid outlet pipe (50) is used to be connected to the second interface (34).

2. The portable dosing device for nuclear power plants according to claim 1, characterized in that: The inner cavity of the liquid storage bottle (30) is further provided with a liquid guide tube (35), one end of the liquid guide tube (35) is connected to the second interface (34), and the other end of the liquid guide tube (35) extends to the bottom of the inner cavity of the liquid storage bottle (30).

3. The portable dosing device for nuclear power plants according to claim 1, characterized in that: The liquid storage bottle (30) is also provided with a pair of handles (36).

4. The portable dosing device for nuclear power plants according to claim 1, characterized in that: The liquid storage bottle (30) comprises a bottle body (31), wherein the bottle body (31) has a liquid injection port (311) opening upward; The liquid storage bottle (30) further comprises a bottle cap (32) for sealing the liquid injection port (311).

5. The portable dosing device for nuclear power plants according to claim 4, characterized in that: The bottle cap (32) comprises a cap body (321), and the cap body (321) is provided with at least one second pressure gauge (322) and / or at least one pressure relief valve (323).

6. The portable dosing device for nuclear power plants according to claim 5, characterized in that: The cover body (321) is also provided with a limiting member (324) for fastening the cover body (321) to the bottle body (31).

7. The portable dosing device for nuclear power plants according to claim 6, characterized in that: A first mounting plate (325) and a second mounting plate (326) are provided on the cover body (321) in parallel and at intervals, the first mounting plate (325) is provided with a first mounting hole (3251), and the second mounting plate (326) is provided with a second mounting hole (3261); The limiting member (324) comprises a first rod portion (3241), a second rod portion (3242), a third rod portion (3243), a fourth rod portion (3244), a fifth rod portion (3245), a sixth rod portion (3246) and a U-shaped portion (3247); The first rod portion (3241) is inserted into the first mounting hole (3251), the second rod portion (3242) is vertically connected to the first end of the first rod portion (3241), the third rod portion (3243) is vertically connected to the second end of the first rod portion (3241), and the second rod portion (3242) and the third rod portion (3243) are vertically connected in space; The fourth rod portion (3244) is inserted into the second mounting hole (3261), the fifth rod portion (3245) is vertically connected to the first end of the fourth rod portion (3244), the sixth rod portion (3246) is vertically connected to the second end of the fourth rod portion (3244), and the fifth rod portion (3245) and the sixth rod portion (3246) are vertically connected in space; the first rod portion (3241) and the fourth rod portion (3244) are coaxially arranged, the second rod portion (3242) and the fifth rod portion (3245) are parallel to each other and both extend downward, and the third rod portion (3243) and the sixth rod portion (3246) are parallel to each other; Both ends of the opening of the U-shaped portion (3247) are respectively connected to an end of the third rod portion (3243) away from the first rod portion (3241) and an end of the sixth rod portion (3246) away from the fourth rod portion (3244), and the U-shaped portion (3247) extends downwardly in an inclined manner.

8. The portable dosing device for nuclear power plants according to claim 6, characterized in that: A sealing ring (327) is provided between the cover body (321) and the inner wall surface of the liquid injection port (311).

9. The portable dosing device for nuclear power plants according to claim 6, characterized in that: The first end of the gas delivery pipe (40) and / or the second end of the gas delivery pipe (40) are provided with a quick connector.

10. The portable dosing device for nuclear power plants according to claim 6, characterized in that: The gas cylinder (10) is provided with a handle (12).

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