CN221987621U - Boric acid feeding device for nuclear power station - Google Patents

Abstract

The utility model discloses a boric acid feeding device of a nuclear power station, which comprises a frame, a feeding mechanism and a feeding mechanism, wherein the feeding mechanism is arranged on the frame; the feeding mechanism is positioned in the frame and comprises a hopper; the feeding mechanism comprises a conveying pipe which is partially positioned in the frame, the conveying pipe is provided with a feeding end and a discharging end which are opposite, a feeding channel is arranged on the side wall of the feeding end of the conveying pipe, and the feeding inlet of the feeding channel is connected with the outlet of the hopper; the bottom of the side wall of the feeding end of the conveying pipe is provided with a discharge opening, and the discharge opening is provided with a sealing element; the transmission pipe is internally provided with a transmission shaft and a spiral sheet arranged on the transmission shaft, and the transmission shaft is connected with the first driving assembly. According to the utility model, the boric acid crystal is crushed and transported, the device is convenient to use, the manual labor of personnel is reduced, the boric acid crystal is prevented from being scattered in the manual transportation process, the industrial safety risk is reduced, and the boron production is more convenient and efficient.

Description

Boric acid feeding device for nuclear power station

Technical Field

The utility model relates to the technical field of boric acid preparation of nuclear power stations, in particular to a boric acid feeding device of a nuclear power station.

Background

At present, a boric acid solution preparation tank is adopted by a nuclear power plant to prepare a boric acid solution meeting requirements, boric acid crystals and nuclear island desalted water are added into the tank in the preparation process of the boric acid solution, but the following problems exist: when the boric acid solution is prepared, a large number of boric acid crystals need to be manually conveyed, so that the efficiency is low and the burden is heavy; boric acid crystals scatter in the carrying process, so that the ground becomes slippery, personnel fall easily, and a large industrial safety risk exists; the stock boric acid crystal is caked and not easy to melt, and the nuclear island desalted water is required to be used for washing for a long time to melt, so that the boron production period is prolonged, the boron production efficiency is reduced, and the unavailable period of the boric acid solution storage tank during the maintenance of the nuclear fuel replacement of the reactor is prolonged; the filter screen of the boric acid solution preparation tank is low in position, so that the foreign matters are not easy to find and clean, and the risk that the foreign matters enter the system exists.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a boric acid feeding device for a nuclear power station.

The technical scheme adopted for solving the technical problems is as follows: a boric acid feeding device of a nuclear power station comprises a frame, a feeding mechanism and a feeding mechanism;

the feeding mechanism is positioned in the frame and comprises a hopper;

The feeding mechanism comprises a conveying pipe which is partially positioned in the frame, the conveying pipe is provided with a feeding end and a discharging end which are opposite, a feeding channel is arranged on the side wall of the feeding end of the conveying pipe, and the feeding inlet of the feeding channel is connected with the outlet of the hopper; the bottom of the side wall of the feeding end of the conveying pipe is provided with a discharge opening, and the discharge opening is provided with a sealing element; the transmission pipe is internally provided with a transmission shaft and a spiral sheet arranged on the transmission shaft, and the transmission shaft is connected with the first driving assembly.

Preferably, the feed inlet is provided with a crushing assembly comprising a rotating shaft and crushing blades mounted on the rotating shaft, the rotating shaft being connected to the second drive assembly.

Preferably, the sealing member is a sealing plate, one side of the sealing plate is rotatably connected to the side wall of the conveying pipe, and the other side of the sealing plate is in snap connection or is connected to the side wall of the conveying pipe through a fastener.

Preferably, the discharge opening extends downwardly to form a discharge channel, the seal being a valve mounted at the outlet of the discharge channel.

Preferably, a charging container is arranged below the discharge opening, and is positioned at the bottom in the frame.

Preferably, the discharge end of the conveying pipe is provided with an ingress pipe, and the conveying pipe is detachably connected or fixedly connected with the ingress pipe.

Preferably, a cover plate is arranged on the top end surface of the hopper, the cover plate is detachably connected with the hopper, and one side of the cover plate is rotationally connected with the side edge of the hopper; or the cover plate is of a separate structure.

Preferably, the included angle between the central axis of the transmission pipe and the horizontal plane is 38-48 degrees, and the rotating speed of the transmission shaft is 300-400rpm.

Preferably, the first drive assembly and the second drive assembly each comprise a servo motor.

Preferably, the frame is provided with a moving assembly, and the moving assembly comprises a plurality of moving wheels.

The utility model has the beneficial effects that: in the boric acid feeding device of the nuclear power station, the foreign matters are found and cleaned in the hopper by feeding the boric acid through the hopper, the spiral sheets in the conveying pipe are used for transporting and crushing the boric acid crystals, and the residual materials in the conveying pipe are discharged through the discharge opening.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a boric acid loading apparatus for a nuclear power plant in some embodiments of the utility model;

FIG. 2 is a cross-sectional view of a transfer tube at a discharge port in the boric acid loading apparatus of the nuclear power plant of FIG. 1;

FIG. 3 is a schematic structural view of a boric acid loading apparatus for a nuclear power plant according to other embodiments of the present utility model;

The reference numerals in the drawings are as follows: 1. a frame; 2. a feed mechanism; 21. a hopper; 22. a cover plate; 3. a feeding mechanism; 31. a transfer tube; 311. a transmission shaft; 312. a spiral sheet; 313. a discharge port; 3131. a discharge channel; 314. a seal; 3141. a sealing plate; 3142. a valve; 32. a feed channel; 321. a feed inlet; 33. a crushing assembly; 331. crushing the blades; 332. a rotating shaft; 34. a charging container; 35. an ingress pipe; 41. a first drive assembly; 42. a second drive assembly; 5. and a moving assembly.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Fig. 1-3 illustrate a boric acid loading apparatus for a nuclear power plant for boric acid loading a boric acid solution formulation tank during a boric acid solution preparation process in some embodiments of the utility model. Referring to fig. 1, fig. 1 is a schematic structural diagram of a boric acid feeding device of a nuclear power plant, where the boric acid feeding device of the nuclear power plant includes a frame 1, a feeding mechanism 2 and a feeding mechanism 3. Wherein the feeding mechanism 2 is located in the frame 1, the feeding mechanism 2 comprises a hopper 21. The feeding mechanism 3 comprises a conveying pipe 31 partially positioned in the frame 1, the conveying pipe 31 is provided with a feeding end and a discharging end which are opposite, a feeding channel 32 is arranged on the side wall of the feeding end of the conveying pipe 31, and a feeding inlet 321 of the feeding channel 32 is connected to an outlet of the hopper 21.

In some embodiments, the side wall of the hopper 21 is inclined inwards, the shape of the inner cavity of the hopper 21 can be an inverted trapezoid or an inverted cone, the shape of an outlet formed at the lower end of the hopper 21 can be rectangular or circular, and the shape of the outlet of the hopper 21 is matched with the shape of the feed inlet 321 of the feed channel 32. The boric acid crystal enters the boric acid solution preparation tank through the hopper 21, so that foreign matters can be found and cleaned before feeding, and meanwhile, operators do not need to carry a large amount of boric acid crystal to a dosing platform of the boric acid solution preparation tank for feeding, and the material can be fed in the hopper 21. In some embodiments, a cover plate 22 is arranged on the top end surface of the hopper 21 to prevent foreign matters from entering the hopper 21, the cover plate 22 is detachably connected with the hopper 21, and one side of the cover plate 22 is rotatably connected with the side edge of the hopper 21; or the cover plate 22 may be a separate structure.

The transmission pipe 31 is internally provided with a transmission shaft 311 and a spiral sheet 312 arranged on the transmission shaft 311, the transmission shaft 311 is connected with the first driving component 41, the first driving component 41 is started and then is provided with the transmission shaft 311 and the spiral sheet 312 to synchronously rotate, the spiral sheet 312 conveys materials from the feeding end to the discharging end of the transmission pipe 31, and the spiral sheet 312 also has a crushing function, so that boric acid crystals can be crushed into powder in the conveying process, and the boric acid crystals are convenient to dissolve.

Since boric acid crystals are easily agglomerated, transportation and pulverization are not facilitated, and the boric acid crystals need to be first pulverized. The feed inlet 321 of the feed channel 32 is provided with a crushing assembly 33, the crushing assembly 33 comprises a rotating shaft 332 and crushing blades 331 arranged on the rotating shaft 332, the crushing blades 331 can be blades, the rotating shaft 332 is connected with a second driving assembly 42, and the second driving assembly 42 drives the rotating shaft 332 and the crushing blades 331 to synchronously rotate after being started, so that boric acid crystals falling into the feed channel 32 are crushed rapidly.

In some embodiments, to increase the degree of breakage of the boric acid crystals, a breaker (not shown) is provided in the hopper 21 to pre-break the boric acid crystals before they fall into the feed channel 32, and to avoid blocking the outlet of the hopper 21 by the larger boric acid crystals. The breaking member may be a breaking hammer; or the inner wall of the hopper 21 is provided with a crushing blade, so that boric acid crystals falling into the hopper 21 can be crushed directly. In other embodiments, the inner wall of the hopper 21 is provided with protrusions to trap larger volumes of boric acid crystals or foreign matter, and then break up or clean the foreign matter. The boric acid crystals are crushed and smashed successively, so that the problem that the boric acid crystals are agglomerated and are required to be washed by desalted water of a nuclear island for a long time to be dissolved is avoided, and the boron production period is shortened.

The plane of the discharge end of the transfer tube 31 is above the plane of the feed end, which is located in the frame 1 below the hopper 21. The central axes of the transfer tube 31 and the drive shaft 311 coincide, and in some embodiments the angle between the central axis of the transfer tube 31 and the horizontal plane is 38 ° -48 °, i.e. the rising angle of the helical fins 312 in the transfer tube 31 is also 38 ° -48 °, preferably 43 °; the rotation speed of the transmission shaft 311 is 300-400rpm, preferably 360rpm, so that the transfer tube 31 has a good material transfer capacity.

The bottom of the side wall of the feeding end of the conveying pipe 31 is provided with a discharge opening 313, the discharge opening 313 is used for discharging the residual materials in the conveying pipe 31 after the conveying pipe 31 stops working, the discharge opening 313 is provided with a sealing element 314, and the sealing element 314 is used for sealing the discharge opening 313 so as to prevent the materials from leaking from the conveying pipe 31 in the transportation process. Referring to fig. 2, fig. 2 is a cross-sectional view of a transfer tube 31 of a boric acid loading device of a nuclear power plant at a discharge opening 313, a sealing member 314 of the transfer tube 31 is a sealing plate 3141, one side of the sealing plate 3141 is rotatably connected to a side wall of the transfer tube 31, and the other side of the sealing plate 3141 is connected to the side wall of the transfer tube 31 in a snap-fit manner or by a fastener. A sealing plate 3141 covers the outside of the discharge opening 313 to ensure complete sealing of the discharge opening 313. Referring to fig. 3, fig. 3 is a schematic structural diagram of a boric acid feeding device of a nuclear power plant in another embodiment, where a discharge opening 313 of a conveying pipe 31 extends downward to form a discharge channel 3131, a sealing member 314 is a valve 3142, and the valve 3142 is installed at an outlet of the discharge channel 3131. In some embodiments, a loading container 34, such as a loading tray, is provided below the discharge opening 313 for collecting the discharge from the discharge opening 313 and adding the discharge to the boric acid solution preparation tank, the loading container 34 being located at the bottom within the frame 1.

The delivery pipe 31 has a delivery port provided with an introduction pipe 35, an inlet of the introduction pipe 35 is connected to an outlet of the delivery pipe 31, and the introduction pipe 35 is positioned above a dosing port of the boric acid solution preparation tank. In some embodiments, the outlet of the transfer tube 31 is located in the sidewall of the discharge end with the opening facing downward, or the outlet of the transfer tube 31 extends slightly vertically downward along the sidewall of the discharge end. Preferably, the introduction pipe 35 is disposed perpendicularly to the horizontal plane so that boric acid in the transfer pipe 31 falls into the boric acid solution preparation tank rapidly. The ingress pipe 35 may employ a bellows in some embodiments. The conveying pipe 31 and the ingress pipe 35 are detachably connected or fixedly connected, wherein the conveying pipe 31 and the ingress pipe 35 can be in threaded connection, specifically, an outlet of a discharge end of the conveying pipe 31 is provided with internal threads, and an inlet periphery of the ingress pipe 35 is provided with external threads which are in threaded fit; or the transfer tube 31 and the introduction tube 35 may be welded.

In some embodiments, the first drive assembly 41 and the second drive assembly 42 each comprise a servo motor. The servo motor may have a forward and reverse driving function, specifically, after the servo motor of the first driving assembly 41 is started, the forward driving shaft 311 is driven to perform boric acid feeding, and after the feeding of the conveying pipe 31 is stopped, the servo motor drives the driving shaft 311 in a reverse direction to transfer the residual material in the conveying pipe 31 to the feeding end of the conveying pipe 31, so that the material is discharged through the discharging opening 313 of the feeding end.

In some embodiments, the frame 1 is provided with a moving assembly 5, and the moving assembly 5 may include a plurality of moving wheels. In some embodiments, the moving wheel may be a universal wheel and is provided with a braking device to brake the boric acid feeding device. The movement assembly 5 may in other embodiments also comprise a wheel carrier to connect the movement wheel with the frame 1.

The boric acid feeding device of the nuclear power station works as follows:

S1, preparing: the cover plate 22 was opened, the hopper 21 was checked for the absence of foreign matter, the seal 314 was checked to close the discharge port 313, and the outlet of the introduction tube 35 was placed above the dosing port of the boric acid solution preparation tank.

S2, power transmission: the first driving assembly 41 and the second driving assembly 42 are started, boric acid crystals are added into the hopper 21, the crushing member and the crushing assembly 33 crush the larger boric acid crystals, and the conveying pipe 31 crushes and conveys the boric acid crystals.

S3, processing the remainder: after boric acid transmission is finished, the second driving component 42 stops running, the sealing element 314 on the discharge opening 313 is opened, the first driving component 41 drives the transmission shaft 311 of the conveying pipe 31 reversely, so that the residual materials in the conveying pipe 31 are discharged to the charging container 34 through the discharge opening 313, after the discharging is finished, the first driving component 41 stops running, the discharge opening 313 is closed, and then boric acid in the charging container 34 is added into the boric acid solution preparation tank.

S4, ending the work: the charge container 34 rests under the discharge opening 313 and closes the cover plate 22.

According to the boric acid feeding device for the nuclear power station, disclosed by the utility model, the boric acid crystals are crushed and transported, wherein the feeding of the boric acid crystals through the hopper 21 is beneficial to finding and cleaning foreign matters in the hopper 21, the spiral slices 312 in the conveying pipe 31 are used for transporting and crushing the boric acid crystals, and the discharge openings 313 are used for discharging the residual materials in the conveying pipe 31, so that the device is convenient to use, a large number of boric acid crystals are not required to be carried by personnel, the manual labor of the personnel is reduced, the boric acid crystals are reduced to be scattered in the manual carrying process, the industrial safety risk is reduced, and the boron making is more convenient and efficient.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The boric acid feeding device of the nuclear power station is characterized by comprising a frame (1), a feeding mechanism (2) and a feeding mechanism (3);

The feeding mechanism (2) is positioned in the frame (1), and the feeding mechanism (2) comprises a hopper (21);

The feeding mechanism (3) comprises a conveying pipe (31) which is partially positioned in the frame (1), the conveying pipe (31) is provided with a feeding end and a discharging end which are opposite, a feeding channel (32) is arranged on the side wall of the feeding end of the conveying pipe (31), and a feeding hole (321) of the feeding channel (32) is connected with an outlet of the hopper (21); a discharge opening (313) is formed in the bottom of the side wall of the feeding end of the conveying pipe (31), and a sealing piece (314) is arranged on the discharge opening (313); a transmission shaft (311) and a spiral sheet (312) arranged on the transmission shaft (311) are arranged in the transmission pipe (31), and the transmission shaft (311) is connected with the first driving component (41).

2. Boric acid feeding device according to claim 1, characterized in that the feed opening (321) is provided with a crushing assembly (33), the crushing assembly (33) comprising a rotating shaft (332) and crushing blades (331) mounted on the rotating shaft (332), the rotating shaft (332) being connected to a second driving assembly (42).

3. The boric acid feeding device of a nuclear power plant according to claim 1, wherein the sealing member (314) is a sealing plate (3141), one side of the sealing plate (3141) is rotatably connected to the side wall of the conveying pipe (31), and the other side of the sealing plate (3141) is connected to the side wall of the conveying pipe (31) in a snap-fit manner or by a fastener.

4. The boric acid loading device according to claim 1, wherein the discharge opening (313) extends downwards to form a discharge channel (3131), the sealing member (314) is a valve (3142), and the valve (3142) is arranged at an outlet of the discharge channel (3131).

5. Boric acid feeding device according to claim 1, characterized in that a charging container (34) is provided below the discharge opening (313), which charging container (34) is located at the bottom inside the frame (1).

6. Boric acid feeding device according to claim 1, characterized in that the discharge end of the transfer pipe (31) is provided with an ingress pipe (35), and the transfer pipe (31) is detachably or fixedly connected with the ingress pipe (35).

7. The boric acid feeding device of a nuclear power plant according to claim 1, wherein a cover plate (22) is arranged on the top end surface of the hopper (21), the cover plate (22) is detachably connected with the hopper (21), and one side of the cover plate (22) is rotatably connected with the side edge of the hopper (21); or the cover plate (22) is of a separate structure.

8. Boric acid feeding device according to claim 1, wherein the angle between the central axis of the transfer pipe (31) and the horizontal plane is 38 ° -48 °, and the rotational speed of the transmission shaft (311) is 300-400rpm.

9. The boric acid feeding device according to claim 2, wherein the first driving assembly (41) and the second driving assembly (42) each comprise a servo motor.

10. Boric acid feeding device according to claim 1, characterized in that the frame (1) is provided with a moving assembly (5), the moving assembly (5) comprising a plurality of moving wheels.