JP2020193524A - Pump facility - Google Patents

Abstract

To curb oil drainage from an inside of a building of a pump facility to outside with a simple and compact structure.SOLUTION: A pump facility 1 of this invention includes a pump that pumps up a liquid and a building floor 41 on which the pump and instruments that needs oil for operation are arranged. The building floor 41 is provided with a drain channel 50 including a drain ditch 42, a drain pit 43 where a liquid in the drain ditch 42 is collected, and a drain pump 44 that discharges the liquid collected in the drain pit 43 to outside. A unit type oil separation bath 60 is provided to the drain channel 50 upstream of the drain pump 44, the oil separation bath separating the oil included in the liquid making use of specific gravity difference.SELECTED DRAWING: Figure 3

Description

The present invention relates to pump equipment.

Conventionally, a pump facility that is equipped with a pump driven by an internal combustion engine, an electric motor, or the like and operates for the purpose of flood control in heavy rain or the like has been known. Such pump equipment needs to operate reliably in the event of a flood, and in order to ensure the soundness of the equipment, pumps and auxiliary equipment are often placed inside the building. In this building, on the building floor where the pump is placed, the leaked liquid such as water leakage from the pump shaft sealing part, handling liquid, drain water, etc. is collected and stored for a long time, and the collected liquid is to some extent. A drainage pump is provided to drain the water to the outside in a short time when the amount is accumulated.

By the way, since the internal combustion engine and the electric motor, which are arranged on the same building floor as the pump, are devices that handle oil, there is a concern about oil leakage. When an oil leak occurs, the oil may be drained to the outside together with the leaked liquid or the like by the above drainage route, which may cause damage to the surrounding ecosystem. In order to prevent this, in the conventional drainage facilities as described in Patent Documents 1 and 2 below, an oil-water separation tank is installed outside the building to separate the oil and then drain the liquid. ..

JP-A-2018-83152 Japanese Patent No. 5274633

However, the conventional oil-water separation tank is a very large facility in order to stably separate oil from a large amount of liquid flowing out from the drainage facility, and its application to the pump facility was considered. In that case, there is no choice but to place it outdoors. In addition, a large amount of liquid drained from the building floor to the outside through the drainage path of the pump equipment is discharged in large quantities by the drainage pump, so that a large oil-water separation tank is required and the amount of discharged water (the momentum of the water flow). ), Oil may be caught in the water flow, and the oil-water separation tank may not function, which may cause oil to flow out.

The present invention has been made in view of the above problems, and an object of the present invention is to suppress the outflow of oil from the inside of a pump facility to the outside with a simple and compact configuration.

The pump equipment according to one aspect of the present invention includes a pump for pumping liquid and a building floor on which the pump and equipment for handling oil are arranged, and the building floor includes a drainage groove and the drainage groove. A drainage path including a drainage pit for collecting the liquid of the above and a drainage pump for draining the liquid collected in the drainage pit to the outside is provided, and the specific gravity is given to the drainage path on the upstream side of the drainage pump. A unit-type oil separation tank is provided to separate the oil contained in the liquid by utilizing the difference.

Further, in the pump equipment, the building floor may be formed with a gradient inclined toward the drainage ditch.
Further, in the pump equipment, the drainage ditch may be a gutter formed near the wall of the building floor.
Further, in the pump facility, the drainage pump may drain the liquid collected in the drainage pit to an outdoor river.
Further, in the pump equipment, the unit type oil separation tank may be provided at a liquid outflow portion from the drainage ditch to the drainage pit.
Further, in the pump equipment, a weir may be provided around the drainage pit except for the outflow portion.
Further, in the pump equipment, the unit type oil separation tank has two or more oil separation flow paths for separating oil contained in a liquid by utilizing the specific gravity difference, or the oil separation flow paths have two. A plurality of units may be combined so as to connect one or more units.
Further, the pump equipment may have an oil detector that detects the oil contained in the unit type oil separation tank.
Further, the pump equipment may have a control device for controlling the drive of the drainage pump based on the detection result of the oil detector.
Further, in the pump equipment, the unit type oil separation tank may be provided in the middle of the drainage ditch.
Further, in the pump equipment, in the drainage ditch on the upstream side of the unit type oil separation tank provided in the middle of the drainage ditch, a gate type pedestal erected in the drainage ditch and the gate type pedestal are provided. A simple oil adsorption device including a weight placed on the weight and an oil adsorption sheet placed on the weight may be provided.

According to the above aspect of the present invention, it is possible to suppress the outflow of oil from the inside of the pump facility to the outside with a simple and compact configuration.

It is a block diagram of the pump equipment 1 which concerns on one Embodiment. It is a top view of the building floor 41 which concerns on one Embodiment. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. It is a figure which looked at the unit type oil separation tank 60 which concerns on one Embodiment from the outlet side (drainage pit 43 side). It is a top view of the unit type oil separation tank 60 which concerns on one Embodiment. FIG. 2 is a cross-sectional view taken along the line BB shown in FIG. It is a side view of the unit type oil separation tank 60 provided in the middle of the drainage groove 42 which concerns on one Embodiment, and the simple type oil adsorption device 90 provided on the upstream side thereof. FIG. 7 is a cross-sectional view taken along the line CC shown in FIG. It is a top view which shows the arrangement of the unit type oil separation tank 60 with respect to the drainage pit 43 which concerns on one Embodiment. 9 is a cross-sectional view taken along the line DD shown in FIG. It is a top view which shows the arrangement of the unit type oil separation tank 60 with respect to the drainage pit 43 which concerns on one Embodiment. It is sectional drawing which shows the structure of the unit type oil separation tank 60 which concerns on one Embodiment. It is sectional drawing which shows the structure of the unit type oil separation tank 60 which concerns on one Embodiment.

Hereinafter, the pump equipment according to the embodiment of the present invention will be described with reference to the drawings. In the following description, as an application example of the present invention, a pump facility (pump station) that operates for the purpose of flood control in heavy rain or the like will be illustrated.

FIG. 1 is a configuration diagram of a pump facility 1 according to an embodiment.
The pump equipment 1 shown in FIG. 1 includes a main pump 10 (pump) and an auxiliary machine 20 for operating the main pump 10. The pump equipment 1 of the present embodiment includes a horizontal axis pump as the main pump 10, but may be a vertical axis pump.

The main pump 10 includes a casing 11 having a suction port 11a that opens into the suction water tank 2 and a discharge port 11b that opens into the discharge water tank 3. The suction water tank 2 and the discharge water tank 3 are provided with water level gauges 2a and 3a for measuring the water levels on the suction side and the discharge side. A pump shaft 12 extending in the lateral direction (horizontal direction) is inserted into the casing 11. An impeller (impeller) (not shown) is connected to the pump shaft 12. Further, a discharge valve 13 is provided on the downstream side of the impeller and on the upstream side of the discharge port 11b.

The main pump 10 is driven by a rotating machine 4 such as an internal combustion engine (diesel engine) or an electric motor. A speed reducer 5 is connected to the drive shaft 4a of the rotary machine 4, and a pump shaft 12 of the main pump 10 is connected to the speed reducer 5. By driving the rotary machine 4, the pump shaft 12 rotates via the speed reducer 5, the water in the suction water tank 2 is pumped by the main pump 10, and the water is discharged to the discharge water tank 3. ing.

The vacuum pump 21 sucks the air in the casing 11 when the main pump 10 is started, and fills the casing 11 with priming water. The vacuum pump 21 is connected to the casing 11 via an intake line 30 (intake pipe). The intake line 30 is provided with a full water detector 14 for detecting the fullness of the priming water in the casing 11 and an intake valve 31 (electric valve or solenoid valve) for opening and closing the intake line 30. The vacuum pump 21 is, for example, a water-sealed (specifically, Nash-type) vacuum pump driven by an electric motor 21a.

In the pump equipment 1 having the above configuration, the main pump 10 is arranged in the building 40. In the building 40, on the building floor 41 where the main pump 10 is arranged, equipment (rotary machine 4, speed reducer 5, etc.) that handles oil for the purpose of lubrication, cooling, or the like is arranged. On the building floor 41, water may leak (including pump handling liquid and flushing water) from the shaft sealing portion where the pump shaft 12 is inserted into the casing 11. Therefore, the building floor 41 is provided with a drainage ditch 42 or the like.

FIG. 2 is a plan view of the building floor 41 according to the embodiment. In FIG. 2, the main pump 10, the rotating machine 4, the speed reducer 5, and the like are not shown in order to improve visibility. FIG. 3 is a cross-sectional view taken along the line AA shown in FIG.
As shown in FIG. 2, the building floor 41 is provided with a drainage path 50 including a drainage ditch 42, a drainage pit 43, a drainage pump 44, and a drainage pipe 45.

The drainage ditch 42 is a gutter formed near a wall surrounding all four sides of the building floor 41. The drainage groove 42 may have a small groove width and groove depth of, for example, about 10 cm. The drainage ditch 42 is formed at a position lower than the floor surface of the building floor 41. Further, a slope (indicated by reference numeral 41a) inclined toward the drainage groove 42 is formed on the floor surface of the building floor 41. The slope of the building floor 41 of the present embodiment is formed in all directions from the central portion of the building floor 41 toward the drainage ditch 42 surrounding the four sides of the building floor 41.

The drainage pit 43 is a water collecting basin that collects the liquid that has fallen into the drainage ditch 42. The drainage pit 43 of the present embodiment is formed in one of the four corners of the building floor 41. The bottom surface of the drainage groove 42 may be inclined toward the drainage pit 43. As shown in FIG. 3, the drainage pit 43 is formed at a position lower than the drainage groove 42.

The drainage pump 44 is provided in the drainage pit 43. As shown in FIG. 2, two drainage pumps 44 of the present embodiment are provided in the drainage pit 43 including a spare machine, but one may be used. The drainage pump 44 drains the liquid collected in the drainage pit 43 to the outside of the building 40 via the drainage pipe 45. The drain pipe 45 extends to, for example, an outdoor river. Alternatively, the drainage pipe 45 extends to an outdoor drainage ditch (waterway) for draining liquid into the river. That is, the liquid collected in the drainage pit 43 is drained to an outdoor river.

As shown in FIG. 3, the drainage path 50 on the upstream side of the drainage pump 44 is provided with a unit type oil separation tank 60 that separates oil contained in the liquid by utilizing the difference in specific gravity between water and oil. .. The unit type oil separation tank 60 shown in FIG. 3 is provided in the liquid outflow portion 60A from the drainage groove 42 to the drainage pit 43. In this embodiment, there are two outflow portions 60A as shown in FIG. 2, and a unit type oil separation tank 60 is provided in each of the two locations.

FIG. 4 is a view of the unit type oil separation tank 60 according to the embodiment as viewed from the outlet side (drainage pit 43 side). FIG. 5 is a plan view of the unit type oil separation tank 60 according to the embodiment.
As shown in FIGS. 4 and 5, the unit type oil separation tank 60 is formed in a rectangular box shape. The unit type oil separation tank 60 has a size that can be easily installed and replaced in the drainage path 50, and is preferably a palm-sized small box that matches the width of the drainage groove 42. Further, it is preferable that the unit type oil separation tank 60 is formed of lightweight plastic or the like rather than being formed of metal.

The unit type oil separation tank 60 has a bottom wall 61, a pair of side walls 62, a front wall 63, and a rear wall 64. The bottom wall 61 is formed in the shape of a rectangular plate in a plan view shown in FIG. The pair of side walls 62, the front wall 63, and the rear wall 64 are erected upward from all sides of the bottom wall 61. As shown in FIG. 3, the front wall 63 forms a wall portion on the side (drainage groove 42 side) on which the liquid of the unit type oil separation tank 60 flows. The rear wall 64 forms a wall portion on the side where the liquid flows out from the unit type oil separation tank 60 (drainage pit 43 side).

The upper end of the front wall 63 is located above the upper end of the rear wall 64. That is, the front wall 63 is higher than the rear wall 64. As a result, the liquid in the unit type oil separation tank 60 overflows from the rear wall 64 and falls into the drainage pit 43 before overflowing from the front wall 63. In this way, a stable flow of liquid (drainage to the drainage pit 43) is ensured by utilizing the height difference, and the liquid is prevented from overflowing from the drainage groove 42.

The pair of side walls 62 extend in the front-rear direction of the unit type oil separation tank 60, connect between the front wall 63 and the rear wall 64, and extend above the front wall 63 and the rear wall 64. A separation wall 66 is supported by the pair of side walls 62. The separation wall 66 is arranged between the front wall 63 and the rear wall 64, and extends from the upper ends of the pair of side walls 62 toward the bottom wall 61.

The lower end 66a of the separation wall 66 is located at least below the upper end of the rear wall 64. Further, the lower end 66a of the separation wall 66 is separated from the bottom wall 61 in the vertical direction. That is, a space (flow path) is formed between the lower end 66a of the separation wall 66 and the bottom wall 61, and the space is filled with liquid. As a result, the unit type oil separation tank 60 is formed with an oil separation flow path 68 that separates oil from the liquid by utilizing the difference in specific gravity between water and oil.

An oil adsorption sheet 67 is attached to the surface of the separation wall 66 facing the front wall 63. The oil adsorption sheet 67 may have a size such that the lower end is located below the upper end of the rear wall 64 and the upper end is located above the upper end of the front wall 63. Further, as shown in FIG. 5, the oil adsorption sheet 67 is preferably the same size as the entire width of the separation wall 66, that is, the space width of the pair of side walls 62.

As shown in FIG. 3, the unit-type oil separation tank 60 having the above configuration is provided in the liquid outflow portion 60A from the drainage groove 42 to the drainage pit 43, so that the amount of water on the upstream side of the drainage pump 44 is smaller (flow). Oil-water separation treatment can be performed in the drainage route 50 (slow), and oil can be suitably separated from the liquid. That is, by installing the unit type oil separation tank 60 in the outflow portion 60A, the liquid before falling from the drainage groove 42 into the drainage pit 43 can be introduced into the unit type oil separation tank 60.

As shown in FIG. 3, the liquid introduced into the unit type oil separation tank 60 beyond the upper end of the front wall 63 of the unit type oil separation tank 60 is stored in advance between the rear wall 64 and the front wall 63. The liquid is stored in the space between the separation wall 66 and the front wall 63. Here, the oil contained in the liquid is separated from the water by the specific gravity, becomes the supernatant liquid of the water, and is adsorbed on the oil adsorption sheet 67 attached to the separation wall 66.

From below the space (reservoir) between the separation wall 66 and the front wall 63, water having a specific gravity heavier than oil passes through the lower end 66a of the separation wall 66 and is behind the separation wall 66. Move to the space between 66 and the rear wall 64. Here, since oil has a lighter specific gravity than water, even if there is excess oil that is not adsorbed by the oil adsorption sheet 67, it will not flow to the lower end 66a of the separation wall 66. Therefore, the liquid stored in the space between the separation wall 66 and the rear wall 64 does not contain oil.

The liquid stored in the space between the separation wall 66 and the rear wall 64 overflows from the upper end of the rear wall 64 and falls into the drainage pit 43. A drainage pump 44 is arranged in the drainage pit 43, and the drainage pump 44 drains the liquid collected in the drainage pit 43 to an outdoor river or the like via the drainage pipe 45. Since this wastewater does not contain oil, there is no risk of damaging the river ecosystem or environment.

As described above, in the present embodiment, in the drainage path 50 on the upstream side of the drainage pump 44, the oil is separated by the water flow (small amount of water) from the drainage groove 42, so that the unit type oil separation tank 60 can be remarkably miniaturized. It is possible, and since the flow velocity is much slower than the discharge water flow on the downstream side of the drainage pump 44 (for example, a flow velocity of about 3 m / s), oil entrainment by the water flow (oil from the unit type oil separation tank 60) Outflow) can be suppressed.
That is, according to the present embodiment, it is possible to suppress the outflow of oil from the inside of the building 40 of the pump facility 1 to the outside with a simple and compact configuration.

Further, as shown in FIG. 3, it is preferable to provide an oil detector 70 for detecting the oil contained in the unit type oil separation tank 60. The oil detector 70 projects the detection light toward the liquid surface of the liquid stored in the space between the separation wall 66 and the front wall 63 of the unit type oil separation tank 60, and receives the reflected light. Detects oil. As a result, the presence or absence of oil leakage can be detected. The detection result of the oil detector 70 may be displayed in the control room of the pump equipment 1. This makes it possible to notify the administrator of the presence or absence of oil leakage (fault or abnormality of equipment or the like).

Further, as shown in FIG. 3, it is preferable to provide a control device 80 that controls the drive of the drainage pump 44 based on the detection result of the oil detector 70. The control device 80 is configured to store, for example, a program for stopping or interlocking (not starting) the drainage pump 44 based on the detection result of the oil detector 70, and execute the program. .. As a result, even if the oil exceeding the allowable amount of the unit type oil separation tank 60 is collected, it is possible to prevent the oil from leaking or spilling into the outdoor river without waiting for the manager. it can.

Further, as shown in FIGS. 2 and 6, it is preferable to provide a weir 46 around the drainage pit 43, excluding the liquid outflow portion 60A from the drainage groove 42 to the drainage pit 43. FIG. 6 is a cross-sectional view taken along the line BB shown in FIG. In this way, by providing the weir 46 that is higher than the floor surface of the building floor 41 around the drainage pit 43, it is possible to reliably prevent the inflow of liquid into the drainage pit 43 from other than the drainage groove 42, and the unit The oil collection efficiency in the mold oil separation tank 60 can be improved, and the equipment can be made highly reliable.

Further, as shown in FIG. 2, it is preferable to provide the unit type oil separation tank 60 not only in the outflow portion 60A but also in the middle of the drainage groove 42 (indicated by reference numeral 60B). This improves the certainty of preventing oil leakage, and makes it easier to determine from which part (where) of the building floor 41 the oil leakage is occurring, which is the root cause of the oil leakage. Parts (equipment) can be easily restored and repaired, and the equipment will be highly reliable.

Further, as shown in FIG. 7, it is preferable to provide a simple oil adsorption device 90 in the drainage groove 42 on the upstream side of the unit type oil separation tank 60 provided in the middle of the drainage groove 42. FIG. 7 is a side view of a unit type oil separation tank 60 provided in the middle of the drainage groove 42 according to the embodiment and a simple type oil adsorption device 90 provided on the upstream side thereof. FIG. 8 is a cross-sectional view taken along the line CC shown in FIG.

As shown in FIG. 8, the simple oil adsorption device 90 has a gate type pedestal 91 erected in the drainage groove 42, a weight 92 mounted on the gantry type pedestal 91, and an oil adsorption device placed on the weight 92. It has a sheet 93 and. The gate-shaped pedestal 91 is formed in a substantially clog shape having two legs 91a separated in the width direction of the drainage groove 42 and a pedestal 91b supported by the two legs 91a. Since it is not necessary to match the width of the drainage groove 42 with the gate type pedestal 91, for example, it may be an inverted U-shaped compact one.

A weight 92 is placed on the pedestal 91b. As the weight 92, a sand bag or the like that can be adjusted according to the width dimension of the drainage groove 42 can be preferably used. Instead of the sand bag, a bag containing a liquid or a solid solution having a specific gravity heavier than that of water may be used. An oil adsorption sheet 93 is attached on the weight 92. The oil adsorption sheet 93 may be the same as the oil adsorption sheet 67 of the unit type oil separation tank 60.

According to the above configuration, as shown in FIG. 7, since the oil can be adsorbed on the upstream side of the unit type oil separation tank 60, it is possible to prevent the collection of oil exceeding the allowable amount of the unit type oil separation tank 60. Therefore, the certainty of preventing oil leakage is further improved. Furthermore, by using a sand bag or the like as the weight 92, it is possible to adjust according to the width dimension of the drainage groove 42, and it is possible to construct a simple oil adsorption device 90 using a material that can be obtained locally at low cost. Become.

Further, as shown in FIGS. 9 and 10, the unit type oil separation tank 60 has two or more oil separation flow paths 68 for separating oil contained in the liquid by utilizing the difference in specific gravity, or the oil separation flow. It is preferable that a plurality of units are combined so that two or more roads 68 are connected. FIG. 9 is a plan view showing the arrangement of the unit type oil separation tank 60 with respect to the drainage pit 43 according to the embodiment. FIG. 10 is a cross-sectional view taken along the line DD shown in FIG. Although FIGS. 9 and 10 show an example in which two unit-type oil separation tanks 60 are combined, two separation walls 66 may be arranged in one unit-type oil separation tank 60. Further, although FIGS. 9 and 10 show an example in which two unit type oil separation tanks 60 are combined, the reliability may be further improved by combining two or more units.

As shown in FIG. 9, by combining two unit type oil separation tanks 60 and extending / integrating the oil separation flow path 68, the oil contained in the liquid can be separated more reliably. Further, as shown in FIG. 10, the same unit type oil separation tank is provided so that the upper end of the rear wall 64 of the front unit type oil separation tank 60 and the upper end of the front wall 63 of the rear unit type oil separation tank 60 are aligned. By combining two 60s, the oil separation flow path 68 can be easily extended and integrated. As shown in FIG. 9, such a unit type oil separation tank 60 may be installed by using the side wall surface 43a on the building 40 side forming the drainage pit 43. Alternatively, as shown in FIG. 11, the unit type oil separation tank 60 may be installed using the side wall surface 42b on the weir 46 side surrounding the drainage pit 43.

Further, as shown in FIG. 12, the oil adsorption sheet 67 may be attached not only to the separation wall 66 but also to the rear wall 64 over the upper end thereof. As a result, even if oil flows to the downstream side of the separation wall 66, it is possible to prevent the oil from flowing into the drainage pit 43, and the reliability can be increased. Further, as shown in FIG. 12, a drain pipe 69a may be connected to the bottom of the unit type oil separation tank 60 to provide a drain valve 69b so as to be openable and closable. As a result, even when sand or the like collects on the bottom of the unit type oil separation tank 60, cleaning can be performed by opening the drain valve 69b, and the maintenance of the unit type oil separation tank 60 becomes easy. As shown in FIG. 13, the bottom wall 61 of the unit type oil separation tank 60 has a downwardly convex curved shape, and a drain pipe 69a is connected to the lowermost end of the bottom wall 61 so that the drain valve 69b can be opened and closed. It may be provided. As a result, the liquid can be smoothly discharged from the bottom of the unit type oil separation tank 60.

Although preferred embodiments of the present invention have been described and described above, it should be understood that these are exemplary of the present invention and should not be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the invention. Therefore, the present invention should not be considered limited by the above description, but is limited by the claims.

For example, in the above embodiment, the drainage groove 42 is described as a gutter formed near the wall of the building floor 41, but the drainage groove 42 is a place other than the wall side of the building floor 41, for example, the drainage groove 42 is the building floor. It may be formed so as to cross the center of 41.
Further, if the drainage ditch 42 is located near the place where the liquid (oil) leaks, it is not always necessary to form a gradient inclined toward the drainage ditch 42 on the building floor 41.

Further, for example, in the above embodiment, the oil is collected and the oil is detected after waiting for the natural leakage of the liquid (oil), but water is actively flowed to the building floor 41 with a small amount of oil. Even if there is, it may be configured so that it can be collected and detected immediately.
For example, a pipe extending from a predetermined water source to the floor surface of the building floor 41 is installed, an electromagnetic valve, an electric valve, or the like is provided in the pipe, and the valve is periodically opened as cleaning water for the floor surface of the building floor 41. It may be adopted. As the predetermined water source, the discharge water tank 3 shown in FIG. 1 (preferably having a water level higher than the floor surface of the building floor 41), the cooling water expansion tank for cooling the rotary machine 4 shown in the figure, and the like (not shown). It is preferable to use the drain pipe of the tank or the like), or the drain pit 43 (preferably a configuration in which the drain pipe 45 is provided with an electric three-way valve and the branched pipe is returned (circulated) to the floor surface of the building floor 41). It may be.

1 Pump equipment 10 Main pump (pump)
40 Building 41 Building floor 42 Drainage ditch 43 Drainage pit 44 Drainage pump 46 Dam 50 Drainage path 60 Unit type oil separation tank 60A Outflow part 68 Oil separation flow path 70 Oil detector 80 Control device 90 Simple oil adsorption device 91 Gate type stand 92 Weight 93 Oil adsorption sheet

Claims (11)

A pump that pumps liquid and
It is equipped with a building floor on which the pump and equipment for handling oil are arranged.
The building floor is provided with a drainage channel including a drainage ditch, a drainage pit for collecting the liquid in the drainage ditch, and a drainage pump for draining the liquid collected in the drainage pit to the outside.
A pump facility characterized in that a unit-type oil separation tank for separating oil contained in a liquid by utilizing a difference in specific gravity is provided in the drainage path on the upstream side of the drainage pump. The pump facility according to claim 1, wherein a slope inclined toward the drainage ditch is formed on the building floor. The pump equipment according to claim 1 or 2, wherein the drainage ditch is a gutter formed near a wall of the building floor. The pump equipment according to any one of claims 1 to 3, wherein the drainage pump drains the liquid collected in the drainage pit to an outdoor river. The pump equipment according to any one of claims 1 to 4, wherein the unit type oil separation tank is provided at a liquid outflow portion from the drainage ditch to the drainage pit. The pump equipment according to claim 5, wherein a weir is provided around the drainage pit excluding the outflow portion. The unit-type oil separation tank has two or more oil separation channels for separating oil contained in a liquid by utilizing the difference in specific gravity, or a plurality of units so that the two or more oil separation channels are connected. The pump equipment according to any one of claims 1 to 6, wherein the pump equipment is made by combining the above. The pump equipment according to any one of claims 1 to 7, further comprising an oil detector that detects oil contained in the unit-type oil separation tank. The pump equipment according to any one of claims 1 to 8, further comprising a control device for controlling the drive of the drainage pump based on the detection result of the oil detector. The pump equipment according to any one of claims 1 to 9, wherein the unit type oil separation tank is provided in the middle of the drainage ditch. In the drainage ditch on the upstream side of the unit type oil separation tank provided in the middle of the drainage ditch, a gate type pedestal erected in the drainage ditch, a weight mounted on the gate type pedestal, and the above. The pump equipment according to any one of claims 1 to 10, wherein a simple oil adsorption device including an oil adsorption sheet placed on a weight is provided.

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