JP4744372B2 - Inspection device for floating detector - Google Patents

Description

  The present invention relates to an inspection apparatus for a floating detection apparatus.

  As shown in FIG. 9, in a facility 200 such as an electric power plant using an oil-filled device 210 such as a power plant or a substation, oil leaking from the oil-filled device 210 is discharged from the outlet 220 of the facility 200. The floating type detection device 100 for detecting the thickness of the oil film is provided so that the oil film does not flow out of the facility 200. For example, the number of facilities 200 managed by Chugoku Electric Power Co. is several hundred. Since one facility is provided with at least one floating detection device, the number of floating detection devices 100 is equal to or greater than the number of facilities 200.

  For example, the floating detection device 100 is always floating in a drainage pit 240 that stores drainage 230 provided between the oil-filled device 210 and the discharge port 220 of the facility 200, and when a predetermined amount of oil is detected, A warning is given to the worker who maintains the facility 200, and the drainage control device (not shown) stops the drainage 230 containing oil from flowing from the drainage pit 240 to the outside of the facility 200 through the discharge port 220. Send a signal. As such a floating type detection apparatus 100, trade name “Eporam C” (CSi-3005) of Asahi Kasei Techno System Co., Ltd. can be used.

  As shown in FIG. 10, the floating type detection apparatus 100 sets the detection layer t in the range of 3 mm to 5 mm. The floating detection device 100 floats in contact with the surface fw so that the tip of the detection electrode 101 is located at a depth of about 2 mm from the surface fw. The floating detection device 100 includes a high-frequency oscillation circuit 102, an AC bridge circuit 103, a switching circuit 104, and a constant voltage power circuit 105. A high frequency voltage of about 1 MHz is applied to the AC bridge circuit 103. A part of the AC bridge circuit 103 is connected in parallel to the three electrodes. Thereby, the change in electrostatic capacitance around the detection electrode 101 can be detected by the AC bridge circuit 103.

  When the oil o flows into the surface fw and the inflowing oil o comes into contact with the detection electrode 101, the floating detection device 100 has a capacitance between the detection electrode 101 and the ground E, in other words, around the detection electrode 101. The capacitance changes greatly, and the balance of the AC bridge circuit 103 is reversed. The switching circuit 104 detects and amplifies that the balance of the AC bridge circuit 103 has been reversed, and the constant voltage power supply circuit 105 converts the current signal into a current signal and sends the signal to a converter (not shown). The floating detection device 100 outputs a high current signal (DC of about 14 mA) when oil is not detected, and outputs a low current signal (DC of about 4 mA) when oil is detected.

  Such a floating type detection apparatus 100 performs an operation confirmation test at a frequency of once a year. For the operation confirmation test, in “8-3. Actual liquid test” section of Non-Patent Document 1, “(1) Bring a container near the float, float water, float the apolarum C, and pour oil into the container. It is performed based on the description of "Measure the oil layer at the time." Specifically, the operation confirmation test is performed according to the procedure shown in FIG.

  First, a predetermined amount of liquid w necessary for floating the floating detection device 100 is stored in a transparent container 110, and the floating detection device 100 is floated in the container 110.

  Next, the inspector gradually injects the oil o contained in the inspection oil-filled container 120 into the container 110, and gradually increases the thickness of the oil film formed on the surface fw. Since the floating type detection device 100 has to detect oil leaked from the oil-filled equipment, the oil o used in the oil-filled equipment such as turbine oil is used as the oil o contained in the inspection oil-filled container 120.

  Next, the inspector monitors a current signal output from the constant voltage power supply circuit 105, for example. The inspector measures the thickness of the oil film when the floating detection device 100 detects oil, and compares the thickness of the oil film with the detection layer.

  Then, the inspector collects the oil injected into the container 110 into a waste liquid container.

The above operation confirmation test is performed three times or more for one floating detection device 100, and the pass / fail determination of the floating detection device 100 is performed based on the comprehensive determination.
Issued by Asahi Kasei Technosystem Co., Ltd., Oil Leak Detector Epolam C: CSi-3005 (Capacitance Type) Instruction Manual, 7th Edition Rev. 1.7, 22p (As of May 19, 2006, the same information is addressed. (http://www.asahi-kasei.co.jp/ats/pdf/epo-inst.pdf)

  In order to determine whether the floating detector 100 is acceptable or not, every time an operation check test is performed, an injection operation for injecting the oil o into the container 110 and a recovery operation for recovering the oil o into the waste liquid container must be performed. The burden of waste liquid treatment of oil o used in the confirmation test occurs.

  In the operation confirmation test, since oil is only injected into the container 110, it is easy to increase the thickness of the oil film, but it is not easy to reduce the thickness of the oil film. Therefore, it is necessary to carefully perform the operation of injecting oil, and it is difficult to say that the operation confirmation test can be easily performed because the test time of the operation confirmation test is long.

  An object of the present invention is to provide an inspection apparatus for a floating detection apparatus that can easily perform an operation confirmation test.

  In order to achieve the above object, the inventor made the following invention in view of the fact that the thickness of the oil film is inversely proportional to the surface area of the oil film in a state where the amount of oil is kept constant.

  (1) An inspection device for a floating detection device that detects the thickness of an oil film, and a liquid storage unit that can store a predetermined amount of non-oil-based liquid necessary for floating the floating detection device A liquid storage unit for storing the oil in a predetermined storage range so that a surface area of an oil film formed by oil on the surface of the liquid becomes a predetermined area, and a storage range changing means for expanding or narrowing the storage range An inspection device for a floating detection device.

  According to the invention described in (1), the inspection device can increase or decrease the surface area of the oil in a state of being suspended on the surface of the liquid by the floating detection device. In other words, the storage range can be expanded or narrowed on the gradually increasing inner peripheral surface. For this reason, the thickness of the oil film changes according to the surface area of the oil. As a result, it is not necessary to add or remove oil during the operation confirmation test, so that the test time for the operation confirmation test is shortened.

  (2) The liquid storage unit is capable of storing a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and is movable in the vertical direction inside the liquid tank. The storage range changing means has a moving device for moving the internal container up and down, and the internal container has a non-water-immersed portion in which the upper port and the lower port are not immersed in the liquid, respectively. And a through passage that is opened to a water-immersed portion that is immersed in the liquid, and the through passage gradually increases in diameter toward the inner surface of the through passage from one side of the through passage toward the other. And the gradually increasing inner peripheral surface has a size capable of floating the floating type detection device in the liquid that has entered from the lower port of the liquid, and the gradually increasing inner peripheral surface What is the surface of the liquid entering from the lower mouth? To storing the oil in the predetermined storage range, the inspection apparatus according to (1).

  According to the invention described in (2), since oil is stored in the gradually increasing inner peripheral surface of the inner container, the storage range is expanded on the gradually increasing inner peripheral surface by moving the inner container up and down by the moving device. Or narrow. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  (3) The liquid storage unit is disposed in a liquid tank capable of storing a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and is relatively immovable inside the liquid tank. The storage range changing means has a pump for injecting and discharging the liquid into the liquid tank, and the internal container has an upper port and a lower port immersed in the liquid, respectively. A through passage that opens to a non-water-immersed portion and a submerged portion that is immersed in the liquid, and the through passage gradually increases in inner diameter of the inner peripheral surface of the through passage from one of the through passages to the other. The gradually increasing diameter inner peripheral surface has a size capable of floating the floating type detection device in the liquid that has entered from the lower opening of the liquid, and the gradually increasing diameter. Liquid entering from the inner peripheral surface and the lower opening The surface cooperate to store the oil in the predetermined storage range, the inspection apparatus according to (1).

  According to the invention described in (3), since oil is stored in the gradually increasing inner peripheral surface of the inner container, by gradually injecting and discharging liquid into the liquid tank by a pump, the gradually increasing inner peripheral surface The storage range can be expanded or narrowed. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  (4) The inspection apparatus for a floating type detection apparatus according to (2) or (3), wherein a ball check valve that does not allow the oil to pass through is provided in the lower opening.

  According to the invention described in (4), it is possible to prevent the oil stored in the predetermined storage range from flowing from the lower port in cooperation with the gradually increasing inner peripheral surface and the surface of the liquid entering from the lower port. it can.

  (5) The liquid storage unit is a through-passage that can store a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and is not immersed in the liquid and the liquid. A liquid supply means for injecting the liquid into the through passage or discharging the liquid from the through passage. An inner peripheral surface of the through passage has a gradually increasing inner peripheral surface in which an inner diameter of the through passage increases from one side of the through passage toward the other, and an inner peripheral surface of the gradually increasing inner peripheral surface And the surface of the liquid supplied by the liquid supply means can jointly store oil, the inspection apparatus according to (1).

  According to the invention described in (5), since the liquid supply means injects liquid into the through passage or discharges liquid from the through passage, the oil is stored in the inner circumferential surface of the gradually increasing diameter of the through passage, and gradually The storage range can be expanded or narrowed on the increased inner peripheral surface. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  (6) The floating-type detection device inspection apparatus according to any one of (2) to (5), wherein a scale for measuring a distance in the vertical direction is attached to the gradually increasing inner peripheral surface.

  According to the invention described in (6), since the oil film is formed in contact with the gradually increasing inner peripheral surface, the thickness of the oil film can be accurately measured.

  (7) The inspection apparatus for a floating type detection apparatus according to any one of (2) to (6), wherein the gradually increasing inner diameter surface has a funnel shape.

  (8) The liquid storage section includes a recess that can store a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and has recesses having side surfaces that face each other in parallel. A tank and a slide plate arranged inside the liquid tank so as to slide the side surface while dividing the vicinity of the surface of the liquid into two, and a surface area of an oil film formed on the surface of the liquid is predetermined. The oil is stored in a predetermined storage range by the side surface and the slide plate so as to have an area, and the storage range changing means prevents the oil from leaking between the slide plate and the side surface of the recess. The inspection apparatus according to (1), further including a sliding portion that slides along the side surface.

  According to the invention described in (8), since the oil is stored in the storage range formed by the side surface of the liquid tank and the slide plate, the storage range can be expanded by sliding the slide plate along the side surface. It can be narrowed. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  (9) The liquid storage unit includes a recess that can store a predetermined amount of non-oil-based liquid necessary for floating the floating detection device and has side surfaces that face each other in parallel. A tank and a slide plate disposed inside the liquid tank so that the side surface slides in a watertight manner, and the side surface of the oil film formed on the surface of the liquid has a predetermined area. And the slide plate store the oil in a predetermined storage range, and the storage range changing means is arranged along the side surface so that the oil and the liquid do not leak from between the slide plate and the side surface of the recess. The inspection apparatus according to (1), including a moving device that slides.

  According to the invention described in (9), the storage range is widened by sliding the slide plate along the side surface so that oil and liquid do not leak from between the slide plate and the side surface of the recess by the moving device. Or narrow. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  According to the present invention, the inspection apparatus can increase or decrease the surface area of the oil film in a state where the floating detection apparatus is suspended on the surface of the liquid. In other words, the storage range can be widened or narrowed on the gradually increasing inner peripheral surface. For this reason, the thickness of the oil film can be changed according to the surface area of the oil film. Thereby, it is not necessary to add or remove oil during the operation confirmation test, so that the test time of the operation confirmation test can be shortened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 are schematic views showing an inspection apparatus 10 of the floating type detection apparatus 100 according to the first embodiment of the present invention.

  As shown in FIG. 1, the inspection apparatus 10 that inspects the floating detection apparatus 100 can store a predetermined amount of non-oil-based liquid w necessary for floating the floating detection apparatus 100. Is provided. The liquid storage unit 30 stores the oil o in a predetermined storage range so that the surface area of the oil film fo formed on the surface of the liquid w becomes a predetermined area. The inspection apparatus 10 further includes storage range changing means 50 that expands or narrows the storage range.

  The liquid storage unit 30 is disposed so as to be able to store a predetermined amount of non-oil-based liquid w necessary for floating the floating detection device 100, and to be movable in the vertical direction inside the liquid tank 20. And an inner container 40. An example of the liquid w is water.

  The liquid tank 20 has a rectangular parallelepiped outer shape, for example. The liquid tank 20 has a recess 21. The recess 21 has an opening 22 having a size that allows the inner container 40 and the floating detection device 100 to be inserted from above. In the vicinity of the bottom 23 of the recess 21, a pipe 24 for discharging the liquid w stored in the recess 21 is provided. A valve 24 a is provided at the tip of the pipe 24. The liquid tank 20 is preferably formed of a transparent material such as transparent plastic.

  The inner container 40 includes a through passage 46 having an upper port 41 and a lower port 42. The through passage 46 has a gradually increasing inner peripheral surface 45 in which the inner diameter of the inner peripheral surface of the through passage 46 increases from one side of the through passage 46 to the other. The gradually increasing inner diameter surface 45 has such a size that the floating type detection device 100 can be suspended in the liquid w that enters the lower port 42. In the present embodiment, the inner diameter surface of the inner diameter surface 45 of the gradually increasing diameter increases from the lower side to the upper side of the through path 46 so that the inner diameter of the inner peripheral surface of the through path 46 increases.

  The gradually increasing inner peripheral surface 45 has a funnel shape so that the liquid area changes temporarily according to the change in the water level of the surface fw in the gradually increasing inner peripheral surface 45. Further, the gradually increasing inner peripheral surface 45 is provided with a scale (not shown) for measuring the distance in the vertical direction.

  As will be described later, water is passed through the lower opening 42 so that the oil o gradually injected into the inner circumferential surface 45 of the increased diameter does not flow out of the recess 21 and the pipe 24 from the lower opening 42. No ball check valve 43 is provided.

  The storage range changing means 50 has a moving device 60 that moves the inner container 40 up and down inside the recess 21.

  The moving device 60 includes a plurality of male screws 61 extending in the vertical direction, a plurality of rotary bearings 62 each indicating that one end of each male screw 61 is rotatable, and a relative rotation to the other end of each male screw 61. A plurality of timing pulleys 63 that are impossiblely assembled, a handle 64 that is relatively non-rotatably assembled to one other end of the plurality of male screws 61, and a timing belt 65 that spans the plurality of timing pulleys 63. . The rotary bearing 62 is assembled to the bottom 23.

  The plurality of male screws 61 are screwed into female screws 44 formed on a flange 47 extending from the periphery of the upper opening 41 of the inner container 40 toward the outer periphery. Accordingly, the moving device 60 holds the inner container 40 so as to move the inner container 40 up and down as the handle 64 rotates clockwise or counterclockwise.

  The above inspection apparatus 10 is used according to the following procedure, for example.

  First, the inspector confirms that the valve 24a is closed.

  Next, the handle 64 is rotated, and the lower opening 42 of the inner container 40 is moved to the bottom 23 of the recess 21 so that the distance between the upper part of the inner container 40 and the bottom of the liquid tank 20 at this time becomes the dimension h1. To approach. Accordingly, the inner container 40 is disposed in the recess 21 so that a gap c is formed between the lower port 42 and the bottom 23 so that the liquid w can flow from the lower port 42.

  Next, the liquid w is poured into the recess 21 of the liquid tank 20. The liquid w is preferably collected from the wastewater collected in the drainage pit in which the floating detection device 100 to be inspected is installed so that the liquid w after the inspection can be returned to the drainage pit as it is.

  As the liquid w is poured, the surface fw of the liquid w rises and enters the through passage 46 from the lower opening 42 through the ball check valve 43. The liquid w is poured until the surface fw of the liquid w is positioned in the vicinity of the upper portion of the gradually increasing inner peripheral surface 45. Thereby, a non-immersed part A that is not immersed in the liquid w and a submerged part B that is immersed in the liquid w are formed in the through-passage 46 and the gradually increasing inner peripheral surface 45. Further, the upper port 41 and the lower port 42 of the through-passage 46 are opened to the non-water-immersed part A that is not immersed in the liquid w and the water-immersed part B that is immersed in the liquid w, respectively.

  Next, the inspector floats the floating detection device 100 in the liquid w on the gradually increasing inner peripheral surface 45. In addition, the inspector operates the floating type detection device 100 that has floated so that the floating type detection device 100 detects oil. As a result, the floating detection device 100 is in a state in which a predetermined amount of oil o is stored on the surface fw of the liquid w, and an oil film fo having a predetermined thickness can be detected. The determination as to whether or not the floating detection device 100 has detected the oil film fo is made by measuring a current signal output from the floating detection device 100.

  Next, the inspector makes the thickness t1 of the oil film fo thinner than the detection layer t (see FIG. 10) of the floating type detection device 100 in the through passage 46 and then the gradually increasing inner diameter surface 45 from the upper opening 41. Inject a quantity of oil o. The oil o at this time forms an oil film fo having a surface area a1. That is, the gradually increasing diameter inner peripheral surface 45 and the surface fw of the liquid w entering from the lower port 42 jointly store the oil o in a predetermined storage range.

  The oil o is prepared in advance in an oil storage container provided in the inspection apparatus 1 with a small amount of test oil, and after the operation test of the floating detection apparatus 100 is completed, the oil o is installed in a facility such as another electric station. It is preferable to store it again in an oil storage container so that it can be used for the operation test of the installed floating detector, or to collect it as a test oil containing some moisture.

  When a predetermined amount of oil o is injected, an oil film fo having a thickness t1 is formed in the radially increased inner peripheral surface 45. At this time, since the thickness t1 is thinner than the detection layer t, the floating detection device 100 cannot detect the oil film fo and outputs a high current signal.

  Next, as shown in FIG. 2, the inspector slowly rotates the handle 64 so that the distance between the upper portion of the inner container 40 and the bottom portion of the liquid tank 20 at this time becomes the dimension h2. Thereby, the range of the non-immersed part A of the inner container 40 is widened, and the range of the flooded part B is narrowed. Accordingly, the position of the surface fw of the liquid w in the gradually increasing inner peripheral surface 45 is lowered on the gradually increasing inner peripheral surface 45, and the oil o forms an oil film fo having a surface area a2 smaller than the surface area a1. . That is, even if the inner container 40 moves up and down, the volume of the oil o does not change, so the thickness t2 of the oil film fo increases as the surface area of the oil film fo decreases. In other words, the surface area of the oil film fo and the thickness of the oil film fo have an inversely proportional relationship.

  When the inner container 40 is further raised, the thickness t2 of the oil film fo eventually reaches the detection layer t of the floating detection device 100, and the floating detection device 100 outputs a low current signal.

  Then, the inspector measures the thickness t2 of the oil film fo when a low current signal is output, and determines whether the floating detection device 100 is acceptable.

  That is, the inspection apparatus 10 increases the surface area of the oil film fo in a state where the floating type detection apparatus 100 is floated on the surface of the liquid w by simply rotating the handle 64 without adding or removing the oil o. (Surface area a1) or narrow (surface area a2). In other words, the storage range can be increased or decreased on the gradually increasing inner peripheral surface 45. For this reason, the thickness of the oil film fo can be changed according to the surface area of the oil film fo. Thereby, it is not necessary to add the oil o or extract the oil o during the operation confirmation test, so that the test time of the operation confirmation test can be shortened.

  3 and 4 are schematic views showing an inspection apparatus 10A of the floating type detection apparatus 100 according to the second embodiment of the present invention.

  As shown in FIG. 3, the inspection apparatus 10A includes a liquid storage unit 30A and a storage range changing unit 50A.

  The liquid storage section 30A is relatively immovable inside the liquid tank 20A capable of storing a predetermined amount of non-oil-based liquid w necessary for floating the floating detection device 100 and the recess 21 of the liquid tank 20A. And an inner container 40A.

  The storage range changing means 50 of the inspection apparatus 10A includes a pump 26 that injects and discharges the liquid w into the liquid tank.

  The inner container 40A includes a through passage 46 in which the upper port 41 and the lower port 42 are opened to the non-immersed part A that is not immersed in the liquid w and the immersed part B that is immersed in the liquid w, respectively.

  One end of the pipe 24 is provided so as to open near the bottom 23 of the recess 21. The other end of the pipe 24 is provided, for example, in the drainage 230 collected in the drainage pit 240 so that the pump 26 can inject and discharge the liquid w. The pump 26 is provided between both ends of the pipe 24. Thereby, according to the operation of the pump 26, the water level of the liquid w in the liquid tank 20A, that is, the dimension h3 can be increased or decreased.

  The inner container 40A is disposed by the fixing means 70 so as not to move relative to the inside of the recess 21 of the liquid tank 20A. Specifically, the fixing means 70 includes a plurality of columns 71 extending in the vertical direction, and a plurality of fixing portions 72 that are each assembled to one end of each column 71 for relative movement. The plurality of fixing portions 72 are assembled to the bottom portion 23 of the recess 21 so as not to be relatively movable. The inner container 40 </ b> A has a flange 47. The flange 47 has a plurality of fitting portions 48 that are fitted to the other ends of the plurality of pillars 71 so as not to move relative to each other. Therefore, the pillar 71 supports the inner container 40 </ b> A via the fitting portion 48.

  The above inspection apparatus 10A is used, for example, according to the following procedure.

  First, the inspector puts the other end of the pipe 24 into the drainage 230 stored in the drainage pit 240, for example.

  Next, the inspector operates the pump 26 to pump the drainage 230 accumulated in the drainage pit 240 into the recess 21 as the liquid w. The liquid w pumped up into the recess 21 enters the through passage 46 from the lower opening 42 through the ball check valve 43. Thereby, a non-immersed part A that is not immersed in the liquid w and a submerged part B that is immersed in the liquid w are formed in the through-passage 46 and the gradually increasing inner peripheral surface 45. Further, the upper port 41 and the lower port 42 of the through-passage 46 are opened to the non-water-immersed part A that is not immersed in the liquid w and the water-immersed part B that is immersed in the liquid w, respectively.

  Next, the inspector stops the operation of the pump 26 once when the distance between the surface fw of the liquid w and the bottom 23 of the recess 21 reaches the dimension h3. Thereby, the surface fw of the liquid w is positioned in the vicinity of the upper portion of the gradually increasing inner peripheral surface 45. Since the inner diameter of the gradually increasing inner peripheral surface 45 decreases as it goes downward, the surface fw of the liquid w becomes narrower.

  Next, the inspector floats the floating detection device 100 in the liquid w on the gradually increasing inner peripheral surface 45. In addition, the inspector operates the floating type detection device 100 that has floated so that the floating type detection device 100 detects oil.

  Next, the inspector puts an amount of oil o in which the thickness t3 of the oil film fo is thinner than the detection layer t of the floating type detection device 100 from the upper opening 41 into the through passage 46 and thus the inside surface 45 of the gradually increasing diameter. inject. As a result, the gradually increasing inner peripheral surface 45 and the surface fw of the liquid w entering from the lower port 42 jointly store the oil o in a predetermined storage range.

  When a predetermined amount of oil o is injected, an oil film fo having a thickness t3 is formed in the radially increased inner peripheral surface 45. At this time, since the thickness t3 is thinner than the detection layer t, the floating detection device 100 cannot detect the oil film fo and outputs a high current signal.

  Next, as shown in FIG. 4, the inspector uses the pump 26 to discharge the liquid w so that the distance between the upper portion of the inner container 40 and the bottom portion 23 of the recess 21 at this time becomes the dimension h4. Operate slowly. Thereby, the range of the non-immersed part A of the inner container 40 is widened, and the range of the flooded part B is narrowed. Accordingly, on the gradually increasing inner peripheral surface 45, the position of the surface fw of the liquid w in the gradually increasing inner peripheral surface 45 is lowered, and the oil o forms an oil film fo having a narrower surface area.

  That is, since the volume of the oil o does not change even when the water level of the liquid w moves up and down, the thickness t4 of the oil film fo increases as the surface area of the oil film fo decreases.

  Further, when the water level of the liquid w is lowered, the thickness t4 of the oil film fo eventually reaches the detection layer t of the floating detection device 100, and the floating detection device 100 outputs a low current signal.

  Then, the inspector measures the thickness t4 of the oil film fo when a low current signal is output, and determines whether the floating detection device 100 is acceptable.

  That is, the inspection apparatus 10A increases the surface area of the oil film fo in a state where the floating type detection apparatus 100 is suspended on the surface of the liquid w only by operating the pump 26 without adding or removing the oil o. Or narrow. In other words, the storage range can be increased or decreased on the gradually increasing inner peripheral surface 45. For this reason, the thickness of the oil film fo can be changed according to the surface area of the oil film fo. Thereby, it is not necessary to add the oil o or extract the oil o during the operation confirmation test, so that the test time of the operation confirmation test can be shortened.

  5 and 6 are schematic views showing an inspection apparatus 10B of the floating type detection apparatus 100 according to the third embodiment of the present invention.

  As shown in FIG. 5, the inspection apparatus 10B includes a liquid storage unit 30B and a storage range changing unit 50B.

  The liquid storage unit 30B includes an external container 80 having a through-passage 86 that can store a predetermined amount of non-oil-based liquid w necessary for floating the floating type detection device 100. In the through passage 86, a non-immersed part A that is not immersed in the liquid w and a submerged part B that is immersed in the liquid w are formed.

  Specifically, the outer container 80 has a through passage 86 formed therein. The through passage 86 has an upper port 81 formed in the non-immersed part A and a lower port 82 formed in the submerged part B.

  The storage range changing unit 50 </ b> B includes an infusion pump 87 that injects the liquid w into the through passage 86 and a drain valve 89 that discharges the liquid w from the through passage 86. The injection pump 87 and the drain valve 89 act as liquid supply means.

  In the upper port 81, the tip of the injection pipe 88 of the liquid w pumped up by the injection pump 87 is arranged so as to face the inside of the through passage 86. Therefore, when the injection pump 87 is operated, the liquid w is injected into the through passage 86, so that the water level of the liquid w in the liquid storage unit 30B can be raised.

  The lower port 82 is connected to the drain valve 89. Therefore, when the drain valve 89 is actuated, the liquid w is discharged from the through passage 86, so that the water level of the liquid w in the liquid storage unit 30B can be lowered. A ball check valve 43 that does not allow oil to pass is disposed in the lower opening 82.

  The inner peripheral surface of the through passage 86 has a gradually increasing inner peripheral surface 85 in which the inner diameter of the through passage 86 increases from one side of the through passage 86 to the other. In the present embodiment, the inner diameter surface 85 of the gradually increasing diameter increases the inner diameter of the through passage 86 from the lower side to the upper side of the through passage 86.

  The above inspection apparatus 10B is used according to the following procedure, for example.

  First, the inspector confirms that the drain valve 89 is closed. Further, the end portion of the injection pipe 88 is put into, for example, the drainage 230 accumulated in the drainage pit 240.

  Next, the inspector operates the infusion pump 87 to pump the drainage 230 accumulated in the drainage pit 240 into the through passage 86 as the liquid w. The liquid w pumped up inside the through passage 86 forms a non-immersed portion A that is not immersed in the liquid w and a submerged portion B that is immersed in the liquid w in the through passage 86 and, consequently, the gradually increasing diameter inner peripheral surface 85. . Further, the upper port 81 and the lower port 82 of the through-passage 86 are released to the non-immersed part A not immersed in the liquid w and the immersed part B immersed in the liquid w, respectively.

  Next, the inspector stops the operation of the infusion pump 87 when the distance between the surface fw of the liquid w and the bottom of the outer container 80 reaches the dimension h5. As a result, the surface fw of the liquid w is positioned in the vicinity of the upper portion of the gradually increasing inner peripheral surface 85. Since the inner diameter of the gradually increasing inner circumferential surface 85 becomes smaller downward, the surface fw of the liquid w becomes narrower.

  Next, the inspector floats the floating detection device 100 in the liquid w on the gradually increasing inner peripheral surface 45. In addition, the inspector operates the floating type detection device 100 that has floated so that the floating type detection device 100 detects oil.

  Next, the inspector puts an amount of oil o in which the thickness t5 of the oil film fo is thinner than the detection layer t of the floating type detection device 100 from the upper port 81 into the through-passage 86 and the inside surface 85 of the gradually increasing diameter. inject. Thereby, the gradually increasing inner peripheral surface 85 and the surface fw of the liquid w injected by the injection pump 87 jointly store the oil o in a predetermined storage range.

  When a predetermined amount of oil o is injected, an oil film fo having a thickness t5 is formed in the gradually increasing diameter inner peripheral surface 85. At this time, since the thickness t5 is thinner than the detection layer t, the floating detection device 100 cannot detect the oil film fo and outputs a high current signal.

  Next, as shown in FIG. 6, the inspector slowly opens the drain valve 89 so that the liquid w is discharged so that the distance between the surface fw of the liquid w and the bottom of the outer container 80 is the dimension h6. Let open. Thereby, the range of the non-immersed part A of the through-passage 86 and the gradually increasing diameter inner peripheral surface 85 is widened, and the range of the flooded part B is narrowed. Accordingly, on the gradually increasing inner peripheral surface 85, the position of the surface fw of the liquid w in the gradually increasing inner peripheral surface 85 is lowered, and the oil o forms an oil film fo having a narrower surface area.

  That is, since the volume of the oil o does not change even if the water level of the liquid w moves up and down, the thickness t6 of the oil film fo increases as the surface area of the oil film fo decreases.

  Further, when the water level of the liquid w is lowered, the thickness t6 of the oil film fo eventually reaches the detection layer t of the floating detection device 100, and the floating detection device 100 outputs a low current signal.

  Then, the inspector measures the thickness t6 of the oil film fo when a low current signal is output, and determines whether the floating detection device 100 is acceptable.

  Since the injection pump 87 can inject liquid into the through-passage and the drain valve 89 can discharge the liquid w from the through-passage 86, the oil o is stored in the gradually increasing inner diameter surface 85 of the through-passage 86, and The storage range can be expanded or narrowed in the gradually increasing inner peripheral surface 85. For this reason, since the thickness of the oil o can be changed, there is no need to add or remove oil during the operation check test. Test time is shortened.

  FIG. 7 is a schematic diagram showing an inspection apparatus for a floating type detection apparatus according to the fourth embodiment of the present invention.

  The inspection apparatus 10C includes a liquid storage unit 30C and a storage range changing unit 50C.

  The liquid storage unit 30C has a liquid tank 20C. 20 C of liquid tanks have the recessed part 21 which can store the predetermined amount non-oil-type liquid w required in order to make the floating type | mold detection apparatus 100 float. The recess 21 has a pair of side surfaces 21a and 21a that face each other in parallel. The liquid storage unit 30C further includes a slide plate 92 disposed inside the liquid tank 20C so as to slide the side surfaces 21a and 21a while dividing the vicinity of the surface of the liquid w into the region A1 and the region A2. The liquid storage unit 30C stores the oil o in a predetermined storage range by the side surfaces 21a and 21a and the slide plate 92 so that the surface area of the oil film fo formed on the surface fw of the liquid w becomes a predetermined area.

  The liquid tank 20C is preferably formed of a transparent plastic. Further, it is preferable that the liquid tank 20C is formed with a scale 29a having equal intervals in the vertical direction and a scale 29b having equal intervals in the horizontal direction.

  The storage range changing means 50C includes a sliding portion 91 that slides along the side surfaces 21a and 21a so that oil o does not leak from between the slide plate 92 and the side surfaces 21a and 21a of the recess 21. The storage range changing means 50C further includes a packing 97 formed between the slide plate 92 and the sliding portion 91 so that the oil o does not leak.

  An opening / closing mechanism 90 is formed on the slide plate 92. The opening / closing mechanism 90 is formed on the gate 93 formed in the vicinity of the lower end portion of the slide plate 92, a lid portion 95 that closes the gate 93, an arm 94 that slides the lid portion 95 in the vertical direction, and the arm 94. And a handle 96.

  The above inspection apparatus 10C is used in accordance with the following procedure, for example.

  First, the inspector confirms that the valve 24a is closed.

  Next, the inspector pours the liquid w into the recess 21 of the liquid tank 20C. Since the gate 93 is formed on the slide plate 92, the liquid w poured into the recess 21 flows into the region A1 and the region A2 through the gate 93. The inspector pours the liquid w into the recess 21 by a predetermined amount.

  Next, the inspector floats the floating detection device 100 in the region A1. Further, the inspector operates the suspended floating type detection device 100 so that the floating type detection device 100 detects oil. As a result, the floating detection device 100 is in a state in which a predetermined amount of oil o is stored on the surface fw of the liquid w in the region A1, and an oil film fo having a predetermined thickness can be detected. . The determination as to whether or not the floating detection device 100 has detected the oil film fo is made by measuring a current signal output from the floating detection device 100.

  Next, the inspector slides the slide plate 92 in a direction away from the floating detection device 100 so that the area A1 is maximized in a range in which the floating detection device 100 can float.

  Next, the inspector injects an amount of oil o into the region A1 so that the thickness t1 of the oil film fo is thinner than the detection layer t of the floating detection device 100. The oil o at this time forms an oil film fo having a surface area when the region A1 is viewed from above. That is, part of the side surface 21a of the recess 21, the slide plate 92, and the surface fw of the liquid w jointly store the oil o in a predetermined storage range.

  Here, when a predetermined amount of oil o is injected, an oil film fo having a predetermined thickness is formed in the region X which is the storage range. Since the thickness at this time is thinner than the detection layer t, the floating type detection device 100 cannot detect the oil film fo and outputs a high current signal.

  Next, the inspector pulls the handle 96 so that the lid portion 95 slides from the gate 93 and connects the region A1 and the region A2 via the gate 93.

  Next, the inspector slides the slide plate 92 in a direction approaching the floating detection device 100. At this time, since the gate 93 is open, the liquid w in the region A1 enters the region A2 through the gate 93. Therefore, the water level in the region A1 and the water level in the region A2 hardly change.

  However, since the surface area of the region A1 as viewed from above becomes narrow, the thickness of the oil film fo increases as the slide plate 92 approaches the floating detection device 100. That is, even if the slide plate 92 slides, the volume of the oil o does not change, so the thickness of the oil film fo increases as the surface area of the oil film fo decreases.

  Further, when the slide plate 92 is brought closer to the floating detection device 100, the thickness of the oil film fo eventually reaches the detection layer t of the floating detection device 100, and the floating detection device 100 outputs a low current signal.

  Then, the inspector measures the thickness of the oil film fo when the low current signal is output using the scale 29a, and determines whether the floating type detection device 100 is acceptable or not.

  Since the oil o is stored in the storage range formed by the side surface 21a of the liquid tank 20C and the slide plate 92, and hence in the region X, the slide plate 92 is slid along the side surface 21a to widen the region X and thus the storage range. Or narrow. For this reason, since the thickness of the oil o can be changed, there is no need to add or remove oil during the operation check test. Test time is shortened.

  FIG. 8 is a schematic view showing an inspection apparatus for a floating type detection apparatus according to the fifth embodiment of the present invention.

  The inspection device 10D of the floating detection device 100 includes a liquid tank 20D and a liquid storage unit 30D.

  The liquid storage unit 30D includes a liquid tank 20D. The liquid tank 20 </ b> D has a recess 21 that can store a predetermined amount of non-oil-based liquid w necessary for floating the floating detection device 100. The recess 21 has side surfaces 21a and 21a that face each other in parallel. The liquid storage unit 30D includes a slide plate 92a disposed inside the liquid tank 20D so as to slide the side surfaces 21a and 21a in a watertight manner. The liquid storage unit 30D stores the oil o in a predetermined storage range by the side surfaces 21a and 21a and the slide plate 92a so that the surface area of the oil film fo formed on the surface fw of the liquid w becomes a predetermined area.

  The storage range changing unit 50D includes a moving device 60D that slides the slide plate 92a along the side surface 21a so that oil o and liquid w do not leak from between the slide plate 92a and the side surface 21a of the recess 21.

  The moving device 60D includes a plurality of male screws 61a extending in the horizontal direction, a plurality of rotary bearings 62a each assembled to one end of each male screw 61 so as to be relatively rotatable, and each of the male screws 61a being connected to the other end of each male screw 61a. A plurality of timing pulleys 63a assembled in a relatively non-rotatable manner, a timing belt 65a hung on the plurality of timing pulleys 63a, a handle 64a for rotating one of the plurality of male screws 61a, and each male screw 61a And a plurality of female screws 66a to be screwed together. The plurality of rotary bearings 62a are assembled to the slide plate 92a. The plurality of female screws 66a are assembled to the side wall of the recess.

  Therefore, the slide plate 92a slides along the side surface 21a by rotating the handle 64a.

  The above inspection apparatus 10D is used in the following procedure, for example.

  First, the inspector confirms that the valve 24a is closed.

  Next, the inspector rotates the handle 64a to slide the slide plate 92a away from the valve 24a. As a result, the liquid w is poured into the region Y on the side where the valve 24a is located, of the two regions of the recess 21 divided into two by the slide plate 92a. Since the slide plate 92a is disposed inside the recess 21 so as to slide in a watertight manner on the side surface 21a of the recess 21, the liquid w poured into the region Y does not flow into the region Z. The inspector pours the liquid w into the region Y by a predetermined amount.

  Next, the inspector floats the floating detection device 100 in the region Y. Further, the inspector operates the suspended floating type detection device 100 so that the floating type detection device 100 detects oil. As a result, the floating detection apparatus 100 is in a state where it can detect that a predetermined amount of oil o is stored on the surface fw of the liquid w in the region Y and an oil film fo having a predetermined thickness is formed. .

  Next, the inspector injects into the region Y an amount of oil o in which the thickness t1 of the oil film fo is thinner than the detection layer t of the floating detection device 100. The oil o at this time forms an oil film fo having a surface area when the region Y is viewed from above. That is, a part of the side surface 21a of the recess 21, the slide plate 92a, and the surface fw of the liquid w together form a storage range in which the oil o is stored in a predetermined storage range.

  Here, when a predetermined amount of oil o is injected, an oil film fo having a predetermined thickness is formed in the region Y that is the storage range. Since the thickness at this time is thinner than the detection layer t, the floating type detection device 100 cannot detect the oil film fo and outputs a high current signal.

  Next, the inspector rotates the handle 64 a to slide the slide plate 92 a in a direction approaching the floating detection device 100. At this time, the opening like a gate is not formed in the slide plate 92a, and the liquid w in the region Y does not enter the region Z. Accordingly, the water level in the region Y is increased by the sliding of the slide plate 92a.

  However, since the surface area of the region Y viewed from above becomes narrow, the thickness of the oil film fo increases as the slide plate 92a approaches the floating detection device 100.

  Further, when the slide plate 92a is brought closer to the floating detection device 100, the thickness of the oil film fo eventually reaches the detection layer t of the floating detection device 100, and the floating detection device 100 outputs a low current signal.

  Then, the inspector measures the thickness of the oil film fo when the low current signal is output using the scale 29a, and determines whether the floating type detection device 100 is acceptable or not.

  By moving the slide plate 92a along the side surface 21a so that the oil o and the liquid w do not leak between the slide plate 92a and the side surface 21a of the recess 21 by the moving device 60D, the storage range is widened or narrowed. Can be. For this reason, since the thickness of the oil film can be changed, there is no need to add or remove oil during the operation confirmation test. Reduce time.

  It should be noted that the effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a schematic diagram which shows the inspection apparatus of the floating type | mold detection apparatus in the 1st Embodiment of this invention. It is a schematic diagram which shows the state of the inspection apparatus following FIG. It is a schematic diagram which shows the inspection apparatus of the floating type | mold detection apparatus in the 2nd Embodiment of this invention. It is a schematic diagram which shows the state of the inspection apparatus following FIG. It is a schematic diagram which shows the inspection apparatus of the floating type | mold detection apparatus in the 3rd Embodiment of this invention. It is a schematic diagram which shows the state of the inspection apparatus following FIG. It is a schematic diagram which shows the inspection apparatus of the floating type | mold detection apparatus in the 4th Embodiment of this invention. It is a schematic diagram which shows the inspection apparatus of the floating type | mold detection apparatus in the 5th Embodiment of this invention. It is a schematic diagram which shows the installation in which the floating type | mold detection apparatus is installed. FIG. 10 is an electric circuit diagram of the floating detection device shown in FIG. 9. It is a schematic diagram which shows the inspection method of the floating type | mold detection apparatus shown in FIG.

Explanation of symbols

A Non-immersed part B Submerged part A1, A2, X, Y, Z Area fo Oil film fw Liquid surface o Oil w Liquid 10, 10A, 10B, 10C, 10D Inspection device 20, 20A, 20C, 20D Liquid tank 21 Recessed part 21a Side surface 22 of the recess 23 Opening 23 Bottom 24 Pipe 24a Valve 26 Pumps 29a, 29b Scale 30, 30A, 30B, 30C, 30D Liquid reservoir 40, 40A Inner container 41, 81 Upper port 42, 82 Lower port 43 Ball check valve 44 Female Screws 45, 85 Gradually increasing inner peripheral surface 46 Through passage 47 Flange 48 Fitting portions 50, 50A, 50B, 50C, 50D Storage range changing means 60, 60D Moving device 61, 61a Male screw 62, 62a Rotary bearing 63, 63a Timing pulley 64, 64a Handle 65, 65a Timing belt 66a Female screw 70 Fixing means 71 Column 72 Fixing portion 80 External container 86 Through passage 87 Injection pump 88 Injection pipe 89 Drain valve 90 Opening / closing mechanism 91 Sliding portion 92, 92a Slide plate 93 Gate 94 Arm portion 95 Handle 97 Packing 100 Floating type detection device 230 Drainage 240 Drainage pit

Claims (9)

An inspection device for a floating detection device that detects the thickness of an oil film,
A liquid storage unit capable of storing a predetermined amount of non-oil-based liquid necessary for floating the floating-type detection device so that a surface area of an oil film formed by oil on the surface of the liquid becomes a predetermined area. A liquid storage section for storing the oil in a predetermined storage range;
An inspection apparatus for a floating detection device, comprising storage range changing means for expanding or narrowing the storage range. The liquid storage unit is disposed in a liquid tank capable of storing a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and is movable in the vertical direction inside the liquid tank. An internal container,
The storage range changing means has a moving device for moving the inner container up and down,
The inner container includes a through path that opens to a non-immersed part in which the upper port and the lower port are not immersed in the liquid and a submerged part that is immersed in the liquid, respectively.
The through passage has a gradually increasing inner peripheral surface in which the inner diameter of the inner peripheral surface of the through passage increases from one to the other of the through passage,
The gradually increasing inner peripheral surface has a size capable of floating the floating detection device in the liquid that has entered from the lower opening of the liquid,
The inspection apparatus according to claim 1, wherein the gradually increasing inner peripheral surface and the surface of the liquid entering from the lower port jointly store the oil in the predetermined storage range. The liquid storage unit includes a liquid tank capable of storing a predetermined amount of non-oil-based liquid necessary for floating the floating type detection device, and an interior disposed in a relatively immovable manner inside the liquid tank. A container,
The storage range changing means has a pump for injecting and discharging the liquid into the liquid tank,
The inner container includes a through path that opens to a non-immersed part in which the upper port and the lower port are not immersed in the liquid and a submerged part that is immersed in the liquid, respectively.
The through passage has a gradually increasing inner peripheral surface in which the inner diameter of the inner peripheral surface of the through passage increases from one to the other of the through passage,
The gradually increasing inner peripheral surface has a size capable of floating the floating detection device in the liquid that has entered from the lower opening of the liquid,
The inspection apparatus according to claim 1, wherein the gradually increasing inner peripheral surface and the surface of the liquid entering from the lower port jointly store the oil in the predetermined storage range.   The inspection apparatus for a floating type detection apparatus according to claim 2 or 3, wherein a ball check valve that does not allow the oil to pass through is provided in the lower opening. The liquid storage unit is a through-passage that can store a predetermined amount of non-oil-based liquid necessary for floating the floating detection device, and is immersed in the liquid and a non-immersed part that is not immersed in the liquid. An external container having a through passage formed with a submerged part,
The storage range changing means includes a liquid supply means for injecting the liquid into the through passage or discharging the liquid from the through passage,
The inner peripheral surface of the through passage has a gradually increasing inner peripheral surface in which the inner diameter of the through passage increases as it goes from one of the through passages to the other,
The inspection apparatus according to claim 1, wherein the inner peripheral surface of the gradually increasing inner peripheral surface and the surface of the liquid supplied by the liquid supply unit can jointly store oil.   The inspection apparatus for a floating type detection apparatus according to any one of claims 2 to 5, wherein a scale for measuring a distance in a vertical direction is attached to the gradually increasing inner peripheral surface.   The inspection apparatus for a floating detection device according to claim 2, wherein the gradually increasing inner peripheral surface has a funnel shape. The liquid storage unit is a recess that can store a predetermined amount of non-oil-based liquid necessary for floating the floating type detection device, and includes a recess having side surfaces that face each other in parallel. And a slide plate disposed inside the liquid tank so as to slide the side surface while dividing the vicinity of the surface of the liquid into two, and the surface area of the oil film formed on the surface of the liquid has a predetermined area And storing the oil in a predetermined storage range by the side surface and the slide plate,
The inspection apparatus according to claim 1, wherein the storage range changing unit includes a sliding portion that slides along the side surface so that the oil does not leak from between the slide plate and the side surface of the recess. The liquid storage unit is a recess that can store a predetermined amount of non-oil-based liquid necessary for floating the floating type detection device, and includes a recess having side surfaces that face each other in parallel. A slide plate disposed inside the liquid tank so as to slide the side surface in a watertight manner, and the side surface and the slide so that a surface area of an oil film formed on the surface of the liquid becomes a predetermined area. The oil is stored in a predetermined storage range by means of a plate,
The inspection according to claim 1, wherein the storage range changing unit includes a moving device that slides the slide plate along the side surface so that the oil and the liquid do not leak from between the slide plate and the side surface of the recess. apparatus.

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