JP2015175267A - Pump and pump system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately check a waste level of a sacrificial anode installed inside a pump.SOLUTION: A liquid pump includes: the sacrificial anode installed inside the pump; a sacrificial anode installation part for installing the sacrificial anode; and a first photoreaction part disposed between the sacrificial anode and the sacrificial anode installation part and having fluorescent property or luminous property reactive to any specific wavelength light.

Description

  The present invention relates to a technique for confirming a consumption state of a sacrificial anode in a pump.

  In vertical shaft pumps used for measures against storm surges, by pumping up water containing seawater, a potential difference is created between the pump impeller (mainly stainless steel) and the pump casing (mainly cast iron or steel). The pump casing that is obsolete will corrode. For this reason, the sacrificial anode method which prevents the corrosion of a pump casing by installing the sacrificial anode which consists of a metal which is base rather than a pump casing in a pump is widely used as an anti-corrosion measure. In this sacrificial anode method, for example, a sacrificial anode is installed in a hanging casing or in a bell mouth below the pump impeller, and a new sacrificial anode is attached when the sacrificial anode is exhausted. .

  In a vertical shaft pump that employs such a sacrificial anode method, the sacrificial anode is attached to the inside of the pump, so that the consumption state of the sacrificial anode cannot be confirmed unless the pump is disassembled. In particular, the vertical shaft pump is placed in a water tank under the floor of the pump station, so it is not possible to check the consumption status of the sacrificial anode with a simple disassembly (for example, visual inspection from a hand hole). Will be needed. In other words, it is not realistic to frequently check the consumption state of the sacrificial anode. For this reason, generally, the pump is pulled up based on the design life of the sacrificial anode (about 3 to 5 years), and the sacrificial anode is uniformly replaced regardless of how the sacrificial anode is consumed. ing.

  Since this method does not replace the sacrificial anode according to the consumption level of the sacrificial anode, there is room for improvement in terms of reliability and economy. Specifically, the consumption of the sacrificial anode greatly depends on the surrounding environment (for example, water quality change, water level, pump operating status, paint deterioration status, etc.). For this reason, the replacement of the sacrificial anode based on the design life is faster than expected, and the replacement of the sacrificial anode is performed after a considerable amount of time has elapsed since the sacrificial anode has been completely consumed. Corrosion will progress. On the other hand, if the sacrificial anode is consumed more slowly than expected and does not necessarily require immediate replacement, an increase in maintenance costs will reduce economics if replacement is performed. For this reason, a small camera with a light source is inserted into the pump, the condition of the sacrificial anode is confirmed by the captured image, and the sacrificial anode is replaced at an appropriate time according to the consumption of the sacrificial anode. Has been developed (for example, Patent Document 1 below).

JP 2009-150262 A

However, an image captured in water is not always clear. For example, when the transparency of water is low and cloudy, it may be difficult to check the consumption of the sacrificial anode from the captured image. Moreover, since the size of the camera and the light source that can be inserted into the pump is limited due to space limitations inside the pump, the light source may be insufficient, and a situation in which the sacrificial anode is not sufficiently confirmed can occur. In addition, since the entire sacrificial anode is not necessarily consumed uniformly, it becomes more difficult to confirm the corrosion status of the entire sacrificial anode under conditions where the light source is insufficient. For this reason, there is a need for a technique that can more accurately confirm the consumption state of the sacrificial anode. Such a problem is not limited to the vertical shaft pump but is common to various liquid pumps.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as, for example, the following forms.

  According to a first aspect of the present invention, a liquid pump is provided. This liquid pump has a sacrificial anode installed inside the liquid pump, a sacrificial anode installation section for installing the sacrificial anode, and a fluorescent or phosphorescent material disposed between the sacrificial anode and the sacrificial anode installation section. And a first photoreactive part.

  According to such a liquid pump, a camera having a light source is inserted into the liquid pump to irradiate light at a location where the sacrificial anode is installed. When the sacrificial anode is consumed and the first photoreactive part is exposed, the first photoreactive part emits light by fluorescence or light storage, so that the sacrificial anode is at least locally localized by imaging the light. In fact, it can be easily confirmed that the battery is completely consumed.

  According to the second embodiment of the present invention, in the first embodiment, a space is formed between the sacrificial anode and the sacrificial anode installation portion, and light is applied to the surface of the sacrificial anode installation portion that forms the space. A reaction part is arranged. According to this aspect, when the sacrificial anode is attached to the sacrificial anode installation part, the first photoreactive part does not come into contact with the sacrificial anode. Therefore, since damage to the first photoreactive portion is suppressed, reliability for confirming the consumption state of the sacrificial anode is improved.

  According to the third aspect of the present invention, in the first or second aspect, the sacrificial anode has a structure in which a plurality of single sacrificial anodes are stacked. Between the single sacrificial anodes, a second photoreactive portion having fluorescence or phosphorescence is disposed. The first photoreactive portion and the second photoreactive portion are different in color. According to such a configuration, the second photoreactive portion is exposed during the consumption of the sacrificial anode, and emits light of a color different from that of the first photoreactive portion. The consumption amount of the sacrificial anode can be grasped before it is consumed and the first photoreactive part is exposed. As a result, it becomes possible to manage the state of the liquid pump and predict the replacement timing of the sacrificial anode, and to accurately design an inspection / replacement plan.

  According to the fourth aspect of the present invention, in the first or second aspect, the sacrificial anode has a structure in which a plurality of single sacrificial anodes are stacked. As viewed from the inside of the liquid pump, a second photoreactive portion having fluorescence or phosphorescence is embedded in the single sacrificial anode in the second layer and thereafter. The first photoreactive portion and the second photoreactive portion are different in color. According to this form, there exists an effect similar to a 3rd form.

  According to the fifth aspect of the present invention, in the third or fourth aspect, the sacrificial anode has a structure in which three or more single sacrificial anodes are stacked. A plurality of second photoreactive parts are arranged in the stacking direction. Each of the plurality of second photoreactive portions has a different color. According to such a form, the consumption amount of the sacrificial anode can be grasped in a plurality of stages. Therefore, an inspection / replacement plan can be made accurately.

  According to the sixth aspect of the present invention, in the first or second aspect, the liquid pump includes an attachment member that penetrates the sacrificial anode in order to fix the sacrificial anode to the sacrificial anode installation part. A second photoreactive portion having fluorescence or phosphorescence is formed on the surface of the mounting member. The first photoreactive portion and the second photoreactive portion are different in color. According to this form, there exists an effect similar to the 3rd or 4th form.

  According to a seventh aspect of the present invention, a liquid pump system is provided. This liquid pump system is a camera for imaging the location of the sacrificial anode where the liquid pump according to any one of the first to sixth embodiments is installed, and a camera having a light source, and for displaying the imaging results of the camera. And a memory for storing the imaging result of the camera, and an image processing unit that performs image processing so that the imaging result stored in the memory and the new imaging result can be compared. According to such a liquid pump system, since past imaging results and new imaging results can be compared, it is possible to accurately check the consumption of the sacrificial anode.

  According to the 8th form of this invention, the maintenance method of a pump is provided. In this method, a first photoreactive part having fluorescence or phosphorescence is disposed between a sacrificial anode and a sacrificial anode installation part of a casing of a liquid pump, and a camera is disposed within the sacrificial anode inside the liquid pump. The specific wavelength irradiated when the first photoreactive part is exposed by the step of irradiating the sacrificial anode to the sacrificial anode and the step of irradiating the sacrificial anode to the sacrificial anode while being inserted near the installation part And a step of confirming the degree of consumption of the sacrificial anode by confirming with a camera whether or not the first light reaction unit emits light in response to light. According to this method, the same effect as in the first aspect is obtained.

  According to a ninth aspect of the present invention, in the eighth aspect, the first photoreactive part is further provided between the end face of the sacrificial anode opposite to the sacrificial anode installation part and the first photoreactive part. A step of arranging second photoreactive portions having different colors; The step of confirming the degree of wear includes the first photoreactive part or the second photoreaction in response to the specific wavelength light irradiated when the first photoreactive part or the second photoreactive part is exposed. This is done by confirming whether the unit emits light. According to this method, the same effects as those of the third embodiment are obtained.

  According to the tenth aspect of the present invention, in the eighth or ninth aspect, the specific wavelength light is black light.

  The present invention can be realized as a method for confirming the consumption state of the sacrificial anode installed inside the liquid pump, in addition to the above-described embodiment.

It is sectional drawing which shows schematic structure of the vertical shaft pump system as one Example of this invention. It is the schematic which shows the structure of the periphery of a sacrificial anode. It is the schematic which shows the alternative structure of the structure around a sacrificial anode. It is the schematic which shows the alternative structure of the structure around a sacrificial anode. It is the schematic which shows the alternative structure of a sacrificial anode. It is the schematic which shows the alternative structure of a sacrificial anode. It is the schematic which shows the alternative structure of the structure around a sacrificial anode. FIG. 7 is a schematic diagram partially showing an alternative configuration of a vertical shaft pump system according to another aspect related to the present invention. It is sectional drawing which shows schematic structure of the vertical shaft pump system of the other aspect relevant to this invention. It is the schematic which shows the structure of the periphery of a sacrificial anode in the aspect shown in FIG.

A. Example:
FIG. 1 shows a schematic configuration of a pump system 20 as an embodiment of the equipment of the present invention. The pump system 20 includes a vertical shaft pump 30, a prime mover 39, monitors 41 and 42, and cameras 43 and 44. The vertical pump 30 includes a suspension pipe 31, a pump bowl 32, a suction bell mouth 33, a shaft 34, an outer bearing 35, an underwater bearing 36, and an impeller 37. The shaft 34 extending in the vertical direction is supported by an outer bearing 35 and an underwater bearing 36. An impeller 37 is provided at the lower end of the shaft 34 inside the pump bowl 32. A prime mover 39 is connected to the upper end of the shaft 34. The prime mover 39 is installed on a prime mover base 39a.

  A pump installation hole 91 that penetrates the pump installation floor 90 is formed in the pump installation floor 90, and a water tank 92 is disposed below the pump installation hole 91. A base 93 is formed at the upper end of the pump installation hole 91 over the entire circumferential direction. The vertical shaft pump 30 is installed on the base 93 so that the suspension pipe 31 is suspended in the water tank 92 from the pump installation hole 91. In the pump system 20, when the shaft 34 is rotated by the driving force provided by the prime mover 39, the impeller 37 is also rotated at the same time, and water is pumped upward from the suction bell mouth 33. In FIG. 1, the water level of the water tank 92 is located in the vicinity of the pump bowl 32, but this water level rises to just below the pump installation hole 91 depending on the situation.

  In the vertical shaft pump 30, sacrificial anodes 50 and 80 are provided in the suspension pipe 31 and the suction bell mouth 33. The sacrificial anodes 50 and 80 are made of a metal (typically zinc) that has a higher ionization tendency than the casing (the suspension pipe 31, the pump bowl 32, and the suction bell mouth 33), and corrodes before the casing. This prevents corrosion of the casing. The sacrificial anodes 50 and 80 are consumable parts. When the sacrificial anodes 50 and 80 are consumed due to corrosion, a new sacrificial anode is installed. In order to determine the timing of installation of this new sacrificial anode, the consumption of the sacrificial anodes 50 and 80 is confirmed by the monitors 41 and 42 and the cameras 43 and 44.

  The cameras 43 and 44 have a light source and are configured to be rotatable. These cameras 43 and 44 are inserted into the vertical pump 30 by an arbitrary method. For example, the camera 43 is inserted from the hand hole 38 formed in the casing (discharge curved pipe) on the ground portion of the vertical shaft pump 30 to the installation location of the sacrificial anode 50. For example, the camera 44 is inserted from the inspection port 94 provided in the vertical shaft 30 near the base 93 to the installation location of the sacrificial anode 80. Guide means for guiding the cameras 44 and 45 to the vicinity of the sacrificial anodes 50 and 80 may be provided inside or outside the vertical shaft pump 30.

  The monitors 41 and 42 are communicably connected to the cameras 43 and 44, respectively, and are configured to display images captured by the cameras 43 and 44. In the present embodiment, the monitors 41 and 42 include a memory for storing images captured by the cameras 44 and 45, a captured image stored in the memory (hereinafter also referred to as an old image), and a new captured image ( (Hereinafter also referred to as “new image”). For example, the image processing unit can be realized as a function of a CPU capable of executing a program stored in a memory. For example, the image processing unit may have a function of generating composite image data of the old image and the new image in order to display the old image and the new image on the monitors 41 and 42 simultaneously.

FIG. 2 is a schematic view showing a configuration around the sacrificial anode 50. A hole 31 a is formed in the suspension pipe 31, and the hole 31 a is closed from the outside of the suspension pipe 31 by a sacrificial anode installation part 70 for installing the sacrificial anode 50. The sacrificial anode installation part 70 is, for example, a plate made of the same material as the suspension pipe 31. The sacrificial anode installation part 70 is fixed to the suspension pipe 31 by, for example, bolts (not shown). A sacrificial anode 50 is provided on the surface inside the pump of the sacrificial anode installation portion 70. A photoreaction unit 60 is provided between the sacrificial anode 50 and the sacrificial anode installation unit 70. In this embodiment, the photoreaction unit 60 is formed of a fluorescent material. The photoreaction unit 60 may be, for example, a coating film formed on the surface of the sacrificial anode installation unit 70 or the sacrificial anode 50, or a sheet-like member sandwiched between the sacrificial anode 50 and the sacrificial anode installation unit 70. There may be. Sacrificial anode 50, photoreaction unit 60, and sacrificial anode installation unit 70
Are fixed to each other by, for example, bolts (not shown) passing through them. As described above, the sacrificial anode 50 can be easily replaced by making the sacrificial anode installation part 70 and the suspension pipe 31 separate structures.

  When the sacrificial anode 50 is completely consumed at least locally due to corrosion, the photoreactive portion 60 is exposed. In this state, when the camera 43 emits black light (invisible light having a wavelength of about 320 to 400 nm) toward the installation location of the sacrificial anode 50, the photoreaction unit 60 emits light by a fluorescent reaction. If this image is picked up by the camera 43, the consumed part of the sacrificial anode 50 can be obtained as a very bright picked-up image. On the other hand, when the sacrificial anode 50 is not completely consumed, if the sacrificial anode 50 is irradiated with black light, the photoreactive portion 60 is not exposed, and thus such a light-emitting image cannot be obtained and is relatively dark. An image will be obtained. In this way, a large brightness difference occurs in the captured image depending on whether or not the sacrificial anode 50 is completely consumed, so it can be correctly confirmed whether or not the sacrificial anode 50 is completely consumed. . Although explanation is omitted, since the sacrificial anode 80 has the same configuration as the sacrificial anode 50, the consumption state of the sacrificial anode 80 can be similarly confirmed using the camera 44.

  Several alternative configurations of the configuration around the sacrificial anode 50 will be described. In the following description and related drawings, components corresponding to the components shown in FIG. 2 are given an alphabet such as “a” at the end of the reference numerals used in FIG. Only differences from FIG. 2 will be described.

  FIG. 3 shows an alternative configuration around the sacrificial anode 50. In this example, the sacrificial anode installation part 70 a includes a flat base 71 a and a protrusion 72 a that protrudes in a ring shape from the base 71 a toward the inside of the suspension tube 31. The sacrificial anode 50a is attached to the projecting portion 72a. As a result, a space 73a is formed between the sacrificial anode 50a and the sacrificial anode installation portion 70a. A light reaction portion 60a is formed on the inner surface (horizontal surface) 74a of the protrusion 72a that forms the space 73a and the inner surface (vertical surface) 75a of the base 71a that forms the space 73a.

  According to this configuration, when the sacrificial anode 50a is attached to the sacrificial anode installation part 70a, the photoreaction part 60a does not come into contact with the sacrificial anode 50a. Therefore, damage to the photoreactive portion 60a due to friction or the like is suppressed, and reliability for confirming the consumption state of the sacrificial anode 50a is improved. In addition, since the photoreactive portion 60a is formed on a plurality of surfaces (inner surfaces 74a and 75a) having different directions, the tolerance of the orientation of the camera 43 when the camera 43 is disposed toward the sacrificial anode 50a is increased. The visibility by the camera 43 is improved.

  FIG. 4 shows another alternative configuration around the sacrificial anode 50. In this example, the sacrificial anode 50b has a structure in which a single sacrificial anode 51b, 52b, 53b is laminated. Further, between the sacrificial anodes 51b, 52b, and 53b, photoreactive portions 61b and 62b are disposed, respectively. Between the sacrificial anode 50b and the sacrificial anode installation part 70, the photoreaction part 63b is arrange | positioned similarly to FIG. Each of the photoreactive portions 61b, 62b, 63b has a different color.

According to such a configuration, when the sacrificial anode 51b is consumed and the sacrificial anode 51b or the sacrificial anode 52b is exposed, the consumption of the sacrificial anode 50b is confirmed by imaging with the camera 43. Since the part 62b emits light of a color different from that of the light reaction part 63b, the consumption amount of the sacrificial anode 50b can be grasped in stages before the sacrificial anode 50b is completely consumed. As a result, it becomes possible to manage the state of the vertical shaft pump 30 and predict the replacement timing of the sacrificial anode 50b, so that an inspection / replacement plan can be made accurately. The sacrificial anode 50b has a three-layer structure, but may have a two-layer structure or a structure of four or more layers.

  FIG. 5 shows another alternative configuration of the sacrificial anode 50. In this example, the sacrificial anode 50c has a structure in which a single sacrificial anode 51c, 52c, 53c is laminated. Among these single sacrificial anodes 51c, 52c, and 53c, the single sacrificial anodes 52c and 53c in the second and subsequent layers from the inside of the vertical pump 30 to the outside are respectively connected to the photoreaction units 61c and 61c, respectively. 62c is embedded. Each of the photoreactive portions 61c and 62c has a different color. Although illustration is omitted, as in FIG. 4, a photoreactive portion having a color different from that of the photoreactive portions 61 c and 62 c is also disposed between the sacrificial anode 50 c and the sacrificial anode installation portion 70. According to such a configuration, the same effect as the configuration shown in FIG. 4 is obtained.

  FIG. 6 shows another alternative configuration of the sacrificial anode 50. In this example, the sacrificial anode 50d has a single layer structure. In order to fix the sacrificial anode 50d to the sacrificial anode mounting portion 70, the surface of the mounting member 55d (for example, a bolt, which is simply illustrated) that penetrates the sacrificial anode 50d in the thickness direction has a different color reaction portion. 61d, 62d, and 63d are formed. The bolt is often made of stainless steel, but the bolt is hardly scraped by corrosion. Since only the sacrificial anode 50d is reduced, the light reaction portions 61d, 62d, and 63d attached to the bolts are exposed one after another. Even with this configuration, the same effects as the configuration shown in FIG. 4 are obtained.

  FIG. 7 shows another alternative configuration around the sacrificial anode 50. In this example, the photoreaction portion 60e is formed by painting on the inner surface of the casing (here, the suspension pipe) 31, and the sacrificial anode 50e is further formed by painting on the surface. In this example, the casing 31 functions as the above-described sacrificial anode installation part 70 (a member for attaching the sacrificial anode 50e).

B. Variation:
B-1. Modification 1:
In the above-described embodiments, the embodiment in which the sacrificial anode is irradiated with the black light is illustrated, but light having an arbitrary wavelength may be irradiated instead of the black light. In this case, a material that causes a fluorescent reaction or a phosphorescent reaction by the irradiated light can be used for the photoreactive portion. For example, the irradiated light may be visible light, for example, illumination light or LED illumination. In this case, a material having a luminous property can be used for the photoreactive portion. Further, in this case, light can be emitted from the camera toward the installation location of the sacrificial anode, and then the light can be turned off to take an image. If the sacrificial anode is consumed and the photoreactive part is exposed, the light emitted by the phosphorescent reaction is imaged by the camera. Blue light (visible light having a wavelength of about 380 to 495 nm) easily scatters because of its short wavelength and high energy in visible light, and further scatters when there are scratches on the wall surface of the irradiated region. For this reason, the presence or absence of scratches can be easily confirmed.

B-2. Modification 2:
It is desirable that the light sources of the cameras 43 and 44 can adjust the wavelength of the irradiation light. For example, it is desirable to be able to change the wavelength within the wavelength range of black light or change from black light to blue light. According to such a configuration, when it is difficult to confirm the light emission with the cameras 43 and 44, the confirmation accuracy can be improved by adjusting the wavelength. Further, the wavelength adjustment is preferably performed by remote operation from the ground. For example, the monitors 41 and 42 may be configured to display a wavelength adjustment GUI (graphical user interface).

B-3. Modification 3:
The configurations shown in FIGS. 4 to 6 are also applicable to a configuration in which the photoreactive portion is not disposed between the sacrificial anode and the sacrificial anode installation portion. For example, in FIG. 4, the photoreaction unit 60b may be composed of only the photoreaction unit 61b and the photoreaction unit 62b. According to such a configuration, the vertical pump 30 can be managed on the safer side, for example, by replacing the sacrificial anode 50b when it is confirmed that the photoreactive portion 62b is exposed.

B-4. Modification 4:
The various configurations described above can be applied not only to the vertical shaft pump 30 but also to any liquid pump, for example, a submersible pump.

C. Other aspects:
C-1. Aspect 1:
FIG. 8 is a schematic diagram partially illustrating an alternative configuration of a vertical shaft pump system according to another aspect relating to the present invention. In this example, the first paint layer 58f is formed on the inner surface of the casing 31 by painting (undercoating), the photoreactive portion 60f is formed on the surface by painting, and further, the surface is painted (final coating). ) To form a second paint layer 57f. In this example, a sacrificial anode is not used. According to such a configuration, when the second paint layer 57f is peeled off due to a collision with a foreign object or the like, it can be confirmed that the photoreactive portion 60f is exposed by the same method as described above. That is, the paint damage can be easily confirmed. As shown in FIGS. 4 to 6, the photoreactive portion 60 f may be formed as a plurality of layers that are separated in the thickness direction of the casing 31. Alternatively, in addition to or instead of the configuration shown in FIG. 8, the photoreactive portion may be formed on the inner wall surface of the casing 31.

C-2. Aspect 2:
FIG. 9 is a cross-sectional view showing a schematic configuration of a vertical shaft pump system 120 according to another aspect related to the present invention. In FIG. 9, the same components as those shown in FIG. 1 are denoted by the same reference numerals as those in FIG. The vertical pump system 120 is different from the pump system 20 shown in FIG. 1 in that an injection tube 110 is provided instead of the photoreaction unit 60 (see FIG. 2). The injection pipe 110 extends from the ground portion to the water tank 92 along the vertical pump 30 outside the vertical pump 30, and is branched into a first injection pipe 111 and a second injection pipe 112 on the way. Yes. The first injection pipe 111 is connected to the vertical pump 30 at a position where the sacrificial anode 50 is provided. The second injection pipe 112 is connected to the vertical pump 30 at a position where the sacrificial anode 80 is provided.

  FIG. 10 is a schematic view showing a configuration around the sacrificial anode 50. Among the constituent elements shown in FIG. 10A, the same constituent elements as those shown in FIG. 3 are denoted by the same reference numerals as those in FIG. As shown in FIG. 10A, the first injection tube 111 passes through the base 71a of the sacrificial anode installation portion 70a and communicates with the space 73a. Although description is omitted, the second injection pipe 112 is also connected to the vertical pump 30 in the same manner. In this embodiment, the consumption level of the sacrificial anode 50a is confirmed as follows. First, a liquid having fluorescence or phosphorescence is injected into the injection tube 110 from the ground. The injected liquid is guided to the first injection tube 111 and the second injection tube 112.

In this case, if the sacrificial anode 50a remaining without being consumed completely covers the space 73a, the liquid guided to the first injection tube 111 stays in the space 73a. In other words, the liquid does not flow into the casing 31. On the other hand, if the sacrificial anode 50a is completely consumed, or if the sacrificial anode 50a is locally consumed and a hole for communicating the inside of the casing 31 and the space 73a is formed, the first injection tube The liquid guided to 111 flows into the casing 31 through the space 73a. If the presence or absence of such an inflow is confirmed by the above-described method using the camera 43, the consumption of the sacrificial anode 50a can be confirmed. According to such a configuration, it is not necessary to provide the photoreaction unit 60 when the vertical pump 30 is initially installed, and the liquid may be injected after a certain period of time has elapsed since the initial installation. In this case, since the fluorescent or phosphorescent substance is unlikely to deteriorate over time, the reliability for confirming the consumption of the sacrificial anode 50a is improved. Although description is omitted, the connection location of the second injection tube 112 can also be confirmed by the same method.

  In the case where the sacrificial anode 50a remaining without being consumed completely covers the space 73a, the liquid once injected into the injection tube 110 remains in the injection tube 110 as it is. For this reason, an arbitrary type of liquid level gauge such as an electrode type or a frit type may be provided in the injection tube 110. According to this configuration, when the sacrificial anode 50a is consumed and the interior of the casing 31 and the space 73a communicate with each other, the liquid level in the injection tube 110 is lowered, so that the consumption of the sacrificial anode 50a can be understood.

  FIG. 10B shows an alternative configuration. In this example, the sacrificial anode 150 has a recess formed on the surface on the sacrificial anode installation portion 70 side, and a space 151 is formed in the recess. The first injection tube 111 passes through the sacrificial anode installation part 70 and communicates with the space 151. Note that the space between the sacrificial anode and the sacrificial anode installation part may be formed on either the sacrificial anode side or the sacrificial anode installation part side.

  Further, the liquid to be injected into the injection tube 110 is not limited to the liquid having fluorescence or phosphorescence, and any liquid can be used. For example, a colored liquid may be used. Also with this configuration, it can be easily confirmed by the cameras 43 and 44 that the liquid flows into the casing 31. Alternatively, when the water level of the water tank 92 is lower than the installation location of the sacrificial anode, as in the location where the sacrificial anode 50 shown in FIG. 9, the liquid injected into the injection tube 110 is simply water. Also good. According to such a configuration, it can be easily confirmed by the cameras 43 and 44 that the liquid flows into the space inside the casing 31 (the space without water).

  The embodiments of the present invention have been described above based on some examples. However, the above-described embodiments of the present invention are for facilitating the understanding of the present invention and limit the present invention. It is not a thing. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. In addition, any combination or omission of each constituent element described in the claims and the specification is possible within a range where at least a part of the above-described problems can be solved or a range where at least a part of the effect is achieved. It is.

20 ... Pump system 30 ... Vertical shaft pump 31 ... Suspension pipe (casing)
31a ... Hole 32 ... Pump bowl 33 ... Suction bell mouth 34 ... Shaft 35 ... Outer bearing 36 ... Underwater bearing 37 ... Impeller 38 ... Hand hole 39 ... Motor 39a ... Motor base 41, 42 ... Monitor 43, 44 ... Camera 50, 50a-50e, 51b-53b, 51c-53c, 80 ... sacrificial anode 55d ... mounting member 57f ... second paint layer 58f ... first paint layer 60, 60a-60f, 61b-63b, 61c, 62c, 61d- 63d ... Photoreaction part 70, 70a ... Sacrificial anode installation part 71a ... Base part 72a ... Projection part 73a ... Space 74a ... Inner surface 90 ... Pump installation floor 91 ... Pump installation hole 92 ... Water tank 93 ... Base 94 ... Inspection port

Claims (10)

A liquid pump,
A sacrificial anode installed inside the liquid pump;
A sacrificial anode installation part for installing the sacrificial anode;
A liquid pump comprising: a sacrificial anode and a first photoreactive portion having fluorescence or phosphorescence disposed between the sacrificial anode and the sacrificial anode installation portion The liquid pump according to claim 1,
A space is formed between the sacrificial anode and the sacrificial anode installation part,
The liquid reaction unit, wherein the photoreaction unit is disposed on a surface of the sacrificial anode installation unit that forms the space. The liquid pump according to claim 1 or 2,
The sacrificial anode has a structure in which a plurality of single sacrificial anodes are stacked,
Between the single sacrificial anode, a second photoreactive part having fluorescence or phosphorescence is disposed,
The first photoreaction unit and the second photoreaction unit have different colors. Liquid pump. The liquid pump according to claim 1 or 2,
The sacrificial anode has a structure in which a plurality of single sacrificial anodes are stacked,
As viewed from the inside of the liquid pump, a second photoreactive portion having fluorescence or phosphorescence is embedded in the single sacrificial anode after the second layer,
The first photoreaction unit and the second photoreaction unit have different colors. Liquid pump. A liquid pump according to claim 3 or claim 4, wherein
The sacrificial anode has a structure in which three or more layers of the single sacrificial anode are laminated,
A plurality of the second photoreaction units are arranged in the stacking direction,
Each of the plurality of second photoreaction units has a different color from each other. The liquid pump according to claim 1 or 2,
An attachment member penetrating the sacrificial anode to fix the sacrificial anode to the sacrificial anode installation part;
On the surface of the mounting member, a second photoreactive part having fluorescence or phosphorescence is formed,
The first photoreaction unit and the second photoreaction unit have different colors. Liquid pump. A liquid pump system,
A liquid pump according to any one of claims 1 to 6,
A camera for imaging the installation location of the sacrificial anode, comprising a light source;
A monitor for displaying the imaging result of the camera;
A memory for storing an imaging result of the camera;
A liquid pump system comprising: an image processing unit that performs image processing so that the imaging result stored in the memory and a new imaging result can be compared. A maintenance method for the pump,
Disposing the first photoreactive part having fluorescence or phosphorescence between the sacrificial anode and the sacrificial anode installation part of the casing of the liquid pump;
Inserting a camera near the sacrificial anode installation part inside the liquid pump and irradiating a specific wavelength light toward the sacrificial anode installation part;
Whether or not the first photoreactive part emits light in response to the irradiated specific wavelength light when the first photoreactive part is exposed due to at least local consumption of the sacrificial anode. And a step of confirming the degree of consumption of the sacrificial anode by confirming in step (a). The pump maintenance management method according to claim 8,
Furthermore, a step of disposing a second photoreactive part having a color different from that of the first photoreactive part between an end surface of the sacrificial anode opposite to the sacrificial anode setting part and the first photoreactive part. With
The step of confirming the degree of consumption includes the first photoreactive part or the second photoreactive part in response to the irradiated specific wavelength light when the second photoreactive part is exposed. The pump maintenance method performed by confirming the presence or absence of light emission by the said 2nd photoreaction part. The pump maintenance method according to claim 8 or 9, wherein
The specific wavelength light is black light.

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