JP6688541B2 - Drain trap, interceptor with drain trap - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drain trap used for an interceptor, a box, or the like that separates and collects oils and fats from wastewater before the oils and fats contained in the drainage flow into sewage.

Install an interceptor at an effective position when drainage containing oil, gasoline, earth and sand, etc. is directly fed to sewage and there is a risk that it will block or damage the sewer pipe, etc. Is obliged to do. An example of the interceptor is a grease interceptor that separates and collects oils and fats from wastewater discharged from a kitchen of a restaurant.

  The grease interceptor has a storage tank main body, and has a drainage inflow chamber with a basket that removes residues and dust that are mixed in the wastewater that has flowed into the storage tank body from the side groove or pipe. A separation chamber that separates oils and fats from the drained wastewater and a drainage trap that prevents odors and insects from entering the drainage pipe are provided at the outlet that discharges the wastewater from which the oils and fats have been separated to the sewer pipe. To be

The grease interceptor may be installed on the floor of the kitchen or under the floor, but most of it is installed under the floor. When it is installed under the floor, there are differences in construction methods depending on the difference in the building structure of the building in which the kitchen exists, including burial, reinforced concrete burying (hereinafter referred to as "mass boosting"), and floor mounting. It is installed either by form burying (hereinafter referred to as "floor suspension") or the like (SHASE-S217. Air Conditioning and Sanitary Engineering Society standard. Hereinafter referred to as "SHASE standard"). The construction method will be described later.

In addition, the storage tank body of the grease interceptor installed under the floor is either deep (height) or shallow (shallow) depending on the construction method. Either shallow type is selected. In addition, there are various types of drain traps to be adopted depending on not only the height of the storage tank body but also the shape of the structure of the building and the arrangement of pipes in the building. There are P type, one type, T type, elbow type, and bulkhead type (Regulations and rules of Japan Interceptor Industry Association / Grease Interceptor Certification Committee). This will also be described in detail later.

  First, the construction method will be described. As shown in FIG. 9 (a), burying means a method of digging the soil in accordance with the size of the reservoir main body 100 and installing the interceptor when the kitchen is on the lowest floor of the building. Buried is a construction method that is possible only when the kitchen is on the lowest floor of the building, because the storage tank is buried in the soil. Further, as shown in FIG. 9 (b), the additional hitting does not penetrate the slab concrete layer 101, which is the structure of the building, and the cinder concrete layer 102 cast on the slab concrete layer 102 has a shallow storage The tank body 103 is embedded. Since the reinforcement does not need to make a hole in the slab concrete layer 101 which is the structure of the building, the construction is easy and the arrangement place is highly flexible. This is the preferred construction method for kitchens on the floors and above.

  However, there is a case where the flow rate required for wastewater treatment is insufficient in the shallow storage tank body used for additional hits, and in that case, even in the kitchen on the second floor or above of the building, deep storage is required. It may be necessary to adopt a tank. In that case, a method called floor hanging is used as a construction method. The floor suspension is, as shown in FIG. 9C, penetrated through the slab concrete layer 101, which is the structure of the building, and an anchor (not shown) attached to the interceptor body is welded to the reinforcing bar 104 in the slab concrete layer. Alternatively, the other end of the support fitting such as the hanging bolt 105 that is driven into the slab concrete layer is attached to the support fitting such as the L steel (angle support) 106 along the bottom of the storage tank body, and the grease interceptor is attached. It is a construction method that supports the whole.

  Here, the height position of the outlet provided in the storage tank main body is determined according to the arrangement of the piping equipment connected to the sewer pipe downstream of the storage tank main body. As shown in (a) and (b), in most cases, the outlet 107 is provided at the same level as the water surface of the waste water stored in the storage tank body (referred to as the standard water level surface WL) or at a position where the pipe core is slightly higher. . On the other hand, in the floor suspension, the piping equipment connected to the sewer pipe is often provided under the slab concrete layer 101 which is the structure of the building, and accordingly, the outlet 108 provided in the main body of the storage tank has the standard water level surface. It is often provided at a position considerably lower than WL.

  As shown in FIGS. 8 (c) and 8 (d), the drain trap attached to the outlet provided at the same height as the standard water surface or at a height where the pipe core is slightly higher is a trap such as a T-shaped or elbow-shaped trap. Is suitable, and a partition type is one of them, as shown in FIG. On the other hand, the drain trap used when the outlet is provided at a position lower than the standard water level surface WL is typically a P type or a one type, as shown in FIGS. In some cases, a partition type as shown in FIG. 8 (f) may be adopted.

Utility model registration No. 3056258 JP, 2004-257081, A

  In the P-type and one-type drain traps used when the outlet of the storage tank main body is provided at a position lower than the standard water level surface, as shown in FIGS. Since it flows down the straight pipe portion 109 and flows down along the inner peripheral surface of the curved pipe portion 110 on the bending direction side, it collides with the bottom surface of the curved pipe portion 110 and bounces back, and it is turbulent by hitting the drainage that also flows downward from above. It may cause flow and may accumulate or partly flow backwards. At this time, the drainage that has accumulated / backflowed in the curved pipe section 110 becomes a water plug by blocking a part of the space in the curved pipe section 110 to form a sealed region in the vertical straight pipe section 109 and further flow down. The air in the sealed area is pulled downstream by the incoming drainage, causing a negative pressure state, and all the drainage in the drain trap is pulled and drawn downstream, which often breaks the sealing water (breaking). Occur. It is known that when comparing the P-type and the One-type, the P-type has a higher possibility of causing the sealing phenomenon than the One-type.

  Further, also in the partition type drain trap, when the outlet is provided at a position lower than the standard water level surface as shown in FIG. 8 (f), like the P type and one type drain traps, A negative pressure state is caused in the outflow portion 111, and although it is less likely than the P-type and one-type drain traps, they may be broken.

Therefore, in order to prevent a negative pressure state from occurring in the P-type drain trap and breaking the seal, in Patent Document 1, as shown in FIG. The angle between the connection pipe portion and the axis line Y-Y in the drainage direction is eccentric to 50 to 75 degrees. Further, as shown in FIG. 11, in Patent Document 2, the axial line angle of the pipe axis Y′-Y ′ of the rising portion of the drain trap 113 is set to an angle of 10 to 80 degrees with respect to the vertical direction YY. It is inclined.

  Referring to FIG. 10, generally, in a grease interceptor, the ratio of the surface area of the separation chamber 114 that separates oils and fats from the waste water in the reservoir main body is as large as possible. The efficiency of oil / fat separation (interception efficiency) is increased. Further, in the SHASE standard, as a general rule, a partition plate 116 is provided between the middle part of the storage tank (corresponding to a separation chamber for floating and separating oils and fats from waste water) and the waste water outflow portion 115 including the waste water trap 112. Is recommended.

  Further, conventionally, in the SHASE standard, the allowable inflow flow rate determined to maintain the processing ability of the grease interceptor is set to 75% of the amount of water that can be stored in the storage tank body (hereinafter, referred to as “practical amount”). However, such restrictions are now abolished, and the allowable inflow flow rate is left to the manufacturers to determine the flow rate if the interception efficiency required by the SHASE standard can be maintained.

When the P-type drain traps 112 and 113 according to Patent Documents 1 and 2 are adopted, as compared with a conventional one-type or P-type drain trap having a typical conventional drain trap shape as shown in FIG. Although the possibility of breaking the seal is somewhat reduced, the space required for the drain trap becomes large and the outflow portion must be wide, and the proportion of the separation chamber in the storage tank main body is reduced accordingly. Further, as shown in FIG. 12, the outlet provided in the storage tank main body may be provided not only on a straight line from the inlet, but also on the side surface of the storage tank main body. Depending on the size of the storage tank, the P-type drain trap according to Patent Documents 1 and 2 may not be attached.

  Also, from the viewpoint of taking the separation chamber as wide as possible, it is necessary to provide a partition plate over the width of the storage tank even in a partition type drain trap that is relatively unlikely to be ruptured. As in the case of the mold type drain trap, it is inevitable that the space required for the outflow portion becomes large and the proportion of the separation chamber in the storage tank main body becomes small.

  Therefore, it is an object of the present invention to provide a drain trap and a grease interceptor that minimize the possibility of breaking even if the allowable inflow rate increases and maintain high interception efficiency.

The interceptor of the present invention comprises, at least in the reservoir main body of the interceptor, a basket into which drainage flows, a separation chamber for floating and separating oil and fat by utilizing the difference in specific gravity between water and oil, and drainage flowing out to a sewer pipe. An outlet that allows the outlet, and a drain trap that is connected to the outlet and that prevents the entry of odors and insects from the outlet downstream ,
The drain trap has a vertical straight pipe portion in which a flow path is formed in a vertical direction, and a top end of the vertical straight pipe portion while maintaining a space for allowing drainage to enter from an upper end opening of the vertical straight pipe portion. Equipped with a water sealing cap that covers the part,
On the downstream side of the vertical straight pipe portion, a curved pipe portion that changes the drainage flow path from the vertical direction to the horizontal direction is connected,
The water sealing cap is characterized in that its central axis is eccentric to the outlet side from the central axis of the vertical straight pipe portion.

Further, the interceptor of the present invention may be provided with a partition plate surrounding the outflow portion including the drain trap. Further, this partition plate may be formed into a three-dimensional shape having three surfaces excluding the outlet side so as to surround the outlet part including the drain trap by being locked to the outlet side inner surface in the storage tank body .

Further, the water sealing cap may be placed and positioned on the partition wall.

Further, the drain trap may be provided such that an inner peripheral surface of the water sealing cap and an outer peripheral surface of an upper end of the vertical straight pipe portion are in contact with each other on a side opposite to the outlet side.

Further, the water-sealing cap that is eccentric to the outlet side can be further eccentric in its center axis in either the left or right direction. By eccentricizing the central axis of the drainage cap to the outlet side in this way, a drainage passage is formed between the water sealing cap and the vertical pipe, and the upper end opening of the vertical pipe enters the water trap. The inflowing drainage flows down along the inner wall on the opposite side of the drainage passage between the sealing cap and the vertical pipe portion, and does not block the space in the curved pipe portion.

  Accordingly, it is possible to provide a drain trap and an interceptor that can minimize the possibility of breaking even if the allowable inflow flow rate increases and can maintain high interception efficiency.

It is the (a) front sectional view of the one type drain trap which concerns on 1st embodiment of this invention, and the (b) (a) top sectional view seen from A-A 'of the front sectional view. It is a top view which shows the variation of the eccentric angle of the one type drain trap which concerns on 1st embodiment of this invention. It is (a) front sectional drawing of the one type drain trap which concerns on 2nd embodiment of this invention, and (b) top view. It is (a) front sectional drawing of the one type drain trap which concerns on 3rd embodiment of this invention, and (b) top view. It is the front view of the (a) water-sealing cap of the one type drain trap which concerns on 3rd embodiment of this invention, and the perspective view of the (b) partition plate. It is (a) front sectional drawing of the one type drain trap which concerns on 4th embodiment of this invention, and (b) top view. It is a top view showing the grease interceptor which attached the one type drain trap concerning the present invention. It is a conventional figure which shows the kind of drain trap. It is sectional drawing which shows the construction method of a grease interceptor, (a) embedding, (b) reinforced concrete embedding, (c) floor suspension type embedding. It is a figure showing the conventional trap attached to the grease interceptor, and is a (a) front view and a (b) top view. It is a front view which shows the conventional trap. It is a figure which shows the position of the outflow port of a grease interceptor, (a) Straight ahead direction, (b) Left direction (it sees from an inflow direction), (c) Right direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same or corresponding parts are designated by the same reference numerals.

  Reference numeral 1 in FIG. 1 is a one-type drain trap according to the first embodiment of the present invention. The drain trap 1 has a vertical pipe portion 2 in which a flow path is formed in a vertical direction, and a bent pipe such as an elbow that is connected to a lower end of the vertical pipe portion 2 to change the flow path of the drainage from the vertical direction to the horizontal direction. It has a portion 3 and a water sealing cap 5 attached so as to cover the upper end opening 4 of the vertical straight pipe portion 2 from above, and the curved pipe portion 3 has the standard water level surface WL of the reservoir tank body 100 of the grease interceptor. It is connected to the outlet 108 provided at a lower position.

The water-sealing cap 5 has a cylindrical shape whose diameter is sufficiently larger than the diameter of the vertical straight pipe portion 2, has an upper surface portion 5a and a cylindrical portion 5b, and has an opening similar to when the bowl is turned upside down. 5c is directed downward, and is attached via a locking member 6 so as to cover the upper end opening 4 of the vertical straight pipe portion 2. At that time, the water sealing cap 5 is attached to the vertical straight pipe portion 2 with the central axis 5L of the water sealing cap 5 eccentric from the central axis 2L of the vertical straight pipe portion 2 toward the bending direction side.

By eccentricizing the central axis 5L of the water sealing cap 5 toward the outlet 108 side, the upper end outer peripheral portion 2a of the vertical straight pipe portion 2 on the opposite side to the advancing direction (bending direction) of drainage in the curved pipe portion 3 is formed. The drainage cap 5 can be mounted on the vertical straight pipe portion 2 so that the inner peripheral portion 5d of the drainage cap 5 opposite to the bending direction of the tubular portion 5b contacts. As a result, a gap G serving as a drainage passage is formed between the inner peripheral surface 5e of the water sealing cap 5 on the bending direction side and the outer peripheral surface 2b of the vertical straight pipe portion 2 on the bending direction side.

As shown by the arrow in FIG. 1, the drainage flows into the upper end opening 4 from the gap G formed on the outlet 108 side (the bending direction side or the flow passage direction side), and the outlet of the vertical straight pipe portion 2 is discharged. Since it flows down along the inner wall on the side opposite to 108, it can be guided to the outflow port 108 and flow without blocking the space inside the curved pipe section 3.

  In addition, as shown in FIG. 1, the lower end 5f of the water sealing cap 5 is installed at a position deeper than the upper end 2c of the vertical straight pipe portion 2, and the overlapping vertical distance is required by the SHASE standard. The water depth is SW.

The locking member 6 shown in FIG. 1 is a plate-like member having a notch 6a aligned with the upper space S of the upper end opening 4, and is crossed as shown in FIG. Fix it. Thereby, the drainage is guided from the gap G through the upper space S into the upper end opening 4.

  FIG. 2 is a diagram in which the eccentric angle of the water sealing cap 5 of the one-type drain trap 1 according to the first embodiment is changed. The central axis 5L of the water sealing cap 5 is up to 90 degrees to the left (sealing cap 5'and its central axis 5L ') from the bending direction (flow path direction) side, or 90 degrees to the right (sealing cap 5 It is also possible to cover the vertical pipe portion 2 up to ″ and its central axis 5L ″, that is, in a state in which the central axis 5L of the water sealing cap 5 is rotated within a maximum range of 180 degrees from the flow path direction.

FIG. 3 is a diagram showing a second embodiment according to the present invention, in which reference numeral 11 is a one-type drain trap. As in the first embodiment, the vertical straight pipe portion 12, the curved pipe portion 13, and the water sealing cap 15 are provided. However, as shown in FIG. A locking member 16 that locks the water sealing cap 15 is formed on the outer peripheral portion of the upper end on the opposite side in the bending direction. The locking member 16 may be provided anywhere as long as it is an outer periphery other than the bending direction of the vertical straight tube portion 12. In the present embodiment, the locking member 16 is provided on the outer circumference in three directions, but it may be provided only on the outer circumference on the bending direction side, or the locking member may be provided on the reservoir main body 100 side. I don't care. Further, the vertical straight tube portion 12 is not limited to a rectangular shape in a plan view, and may be a rectangular shape in a plan view or a circular shape in a plan view.

  The water-sealing cap 15 has a rectangular box shape in a plan view, the opening 15c is directed downward and the tubular portion 15b is fitted into the locking member 16 as when the bowl is turned upside down. . The center axis 15L of the water sealing cap 15 is eccentric from the center axis 12L of the vertical straight tube portion 12 toward the bending direction side, and drainage is in the bending direction inner circumference of the water sealing cap 15 and the bending direction of the vertical straight tube portion 12. It flows into the upper end opening 14 from the gap G provided between the outer peripheries. At this time, since there is nothing that blocks the space S above the upper end opening 14 and does not interfere with the flow of drainage flowing from the gap G, turbulent flow and retention are less likely to occur. The drainage also flows smoothly along the inner wall of the vertical pipe portion 12 as shown by the arrow.

  4 and 5 are views showing a third embodiment according to the present invention. As shown in FIG. 4A, reference numeral 21 is a one-type drain trap. Similar to the first embodiment, it has a cylindrical vertical straight pipe portion 22, a curved pipe portion 23 such as an elbow, and a water sealing cap 25.

  FIG. 5A is a front view of the water sealing cap 25, which includes an upper surface portion 25a and a cylindrical tubular portion 25b having a diameter sufficiently larger than the diameter of the vertical straight pipe portion 22, and the central axis 25L of the tubular portion 25b. Is eccentric to the bending direction side (outlet 108 side) with respect to the central axis 22L of the vertical straight pipe portion 22 to cover the vertical straight pipe portion 22 while maintaining the space S above the upper end opening 24 of the vertical straight pipe portion 22.

  The storage tank body 100 of the grease interceptor using the drain trap 25 of the present embodiment is provided with a partition plate 26 surrounding the outflow portion 100D including the drain trap 25. As shown in FIGS. 4 (b) and 5 (b), the partition plate 26 has a three-dimensional shape having partition plates on three surfaces excluding the outlet port 108 side (the bending direction side). The flange 26a is formed. A locking member 100a is provided on the inner surface of the storage tank body 100 on the side of the outlet 108, and the partition plate 26 is slid from above to lock the flange 26a of the partition plate 26 to the locking member 100a of the storage tank body. Let

  The space surrounded by the partition plate 26 forms the outflow portion 100D, and the lower ends 26b of the three surfaces of the partition plate 26 are configured to be in contact with the bottom surface of the storage tank main body 100, but notches 26c are formed below the three surfaces. It is provided. Through the notch 26c and the opening 26d formed in the bottom surface of the storage tank main body 100, the waste water after the oils and fats are separated in the separation chamber 100E flows in. Although FIG. 5 (b) discloses that the notches 26c are provided on all three surfaces, the notches 26c may be provided only on both sides, or may be provided only on the opposite surface in the bending direction. I don't care. The notch 26c is provided at a position lower than the lower end of the tubular portion of the water sealing cap 25 of the drain trap 21. Even if the notch 26c is broken, oil and fat in the separation chamber will flow out from the outlet. I did not try to do it.

  As shown in FIG. 4B, the upper surface portion 25a of the water sealing cap 25 has a rectangular shape in a plan view, and a peripheral edge 25c thereof is bent in the vertical direction on the same side as the three surfaces of the partition plate 26, and is opposite to the bending direction. By placing the upper surface portion 25a on the upper end 26e of the partition plate 26 so that the inner surface of the peripheral edge 25c of the container and the outer surface of the partition plate 26 are in contact with each other, the peripheral edge 25c determines the position of the water sealing cap 25 and The drainage cap 25 can be mounted on the vertical straight pipe portion 22 so that the inner peripheral portion 25d on the side opposite to the bending direction and the upper end outer peripheral portion 22a of the vertical straight pipe portion 22 are in contact with each other.

  Similar to the second embodiment, there is nothing that blocks the upper space S of the upper end opening 24, and the drainage is the inner peripheral surface 25e of the sealing cap 25 on the bending direction side and the outer circumference of the vertical straight pipe portion 22 on the bending direction side. From the gap G formed between the surfaces 22b, the flow is not obstructed and flows into the upper end opening 24, and along the inner wall of the vertical pipe portion 12 as shown by the arrow in FIG. 4 (a). Flows smoothly and is less likely to cause turbulence or retention. As a result, the likelihood of negative pressure in the drain trap is significantly reduced.

  Further, in the partition plate provided over the full width of the reservoir tank body 100 of the grease interceptor as used in the P-type or partition-type drainage trap in FIG. 8, the ratio of the outflow portion to the reservoir tank body 100 is large. The larger one adopts the one-type drain trap 21 according to the present invention, and further adopts the partition plate 26 that surrounds the drain trap 21 from the three sides. As a result, as shown in FIG. The place that was the outflow portion can be used as the separation chamber 100E, and when compared with the storage tanks having the same capacity, the interception efficiency is increased and the allowable inflow flow rate can be increased.

  FIG. 6 is a diagram showing a fourth embodiment according to the present invention. Similar to the first and third embodiments, the drain trap 31 has a cylindrical vertical straight pipe portion 32 and a curved pipe portion 33 such as an elbow connected to the outlet 108. Similar to the partition plate 26 of the second embodiment, the water sealing cap 35 has a three-dimensional shape having partition plates on three surfaces excluding the outflow port 108 side (bending direction side), and the partition plate 36 on the outflow port 108 side. Form a flange 36a.

A locking member 100a is provided on the inner surface of the reservoir main body 100 on the side of the outlet 108, and the partition plate 36 is slid from above so that the flange 36a of the partition plate 36 is locked by the retaining member 100a of the storage tank main body. The lower end 36b of the partition plate 36 of the fourth embodiment is locked away from the bottom surface of the reservoir main body 100. The lower end 36b is provided at a position lower than the lower end of the tubular portion of the water sealing cap 35 of the drain trap 31, so that even if the lower end 36b is broken, oils and fats in the separation chamber will not flow out from the outflow port. It was done like this. From the space below the lower end 36b of the partition plate 36, the drainage after the separation of oils and fats in the separation chamber 100E flows into the outflow portion 100D which is the space surrounded by the partition plate 36.

  In addition, the water sealing cap 35 has a rectangular box shape in a plan view, and the opening 35c is directed downward to maintain the space S above the vertical pipe portion 32 as when the bowl is turned upside down. It is attached to cover. The central axis 35L of the water sealing cap 35 is eccentric to the bending direction side from the central axis 32L of the vertical straight tube portion 32, and the drainage is the inner circumference in the bending direction of the water sealing cap 35 and the bending direction of the vertical straight tube portion 32. The flow from the gap G provided between the outer peripheries to the upper end opening 34 is the same as in all the embodiments described above.

  A flange 35g is formed on the peripheral edge of the upper surface portion 35a of the water sealing cap 35, and the flange 35g is placed on a flange 36e provided on the upper end of the partition plate opposite to the bending direction of the partition plate 36. By fixing the drainage cap 35 by fixing it, the drainage cap 35 is positioned so that the inner peripheral portion 35d on the side opposite to the bending direction and the upper end outer peripheral portion 32a of the vertical straight pipe portion 32 are in contact with each other. Mount on the part 32.

  It is needless to say that the flanges 35g and 36e for locking and positioning the water sealing cap 35 and the partition plate 36 are not limited to those shown in FIG. 6, but may be provided on other peripheral edges. . Further, the vertical straight pipe portion 32 and the curved pipe portion 33 may have a rectangular shape instead of the cylindrical shape.

  As shown in FIG. 7, the drain traps 1 and 11 shown in the first embodiment and the second embodiment can also be adopted as a grease interceptor by surrounding them with a partition wall 46.

  Further, although all the water sealing caps have disclosed an embodiment in which the upper surface portion and the tubular portion are integrally formed, it is sufficient to remove the water sealing cap and clean the inside of the vertical pipe portion, and only the upper surface portion can be detached. Alternatively, the upper surface may be provided with a detachable lid.

The center axis of the water sealing cap is eccentric in the bending direction compared to the center axis of the vertical pipe section, so the drainage flowing from the bending direction side of the upper end opening is opposite to the bending direction of the vertical pipe section. Since it flows down along the inner wall on the side, it collides with the bottom surface of the curved pipe part and bounces back, and it collides with the drainage that also flows down from the top to cause turbulent flow, drastically reduce retention and partial backflow. Of. Therefore, the generation of water plugs, such as blocking a part of the space in the curved pipe section due to drainage, is drastically reduced, and the sealed area is not created in the vertical pipe section, so that the air in the sealed area is pulled downstream. Since the possibility of causing a negative pressure condition is also drastically reduced, the possibility that all the drainage in the drain trap is pulled and drawn downstream and ruptured is greatly reduced, and the oils and fats floating in the separation tank are drained into the sewage. The possibility of outflow is greatly reduced.

In the grease interceptor adopting the drain trap of the present invention, the allowable inflow flow rate is increased and the interception efficiency of oils and fats is remarkably increased as compared with the storage tank having the same capacity.

Furthermore, since the central axis of the water sealing cap of the present invention is only eccentric in the bending direction as compared with the central axis of the vertical pipe portion, the partition plate which has conventionally been widened to the full width of the storage tank. Since it becomes possible to adopt a partition plate that surrounds the drain trap by maintaining only the gap necessary for the drain to flow around the drain trap, the ratio of the surface area of the separation chamber to the main body of the storage tank. Therefore, the allowable inflow flow rate is increased and the oil and fat interception efficiency is remarkably increased as compared with a storage tank having the same capacity.

  Further, as shown in FIG. 12, the water sealing trap of the present invention is highly versatile and can be attached to the straight-ahead portion or the left and right side surfaces of the storage tank body.

1, 11, 21, 31 Drain trap 2, 12, 22, 32 Vertical straight pipe part 3, 13, 23, 33 Curved pipe part 4, 14, 24, 34 Upper end opening 5, 15, 25, 35 Sealing cap 6, 16 Locking members 26, 36, 46 Partition plate 100 Storage tank body 108 Outlet ports 2L, 12L, 22L, 32L Central axis 5L, 15L, 25L, 35L of vertical straight pipe section Central axis G of sealing cap G S Upper space WL Standard water level surface SW Sealing depth

Claims (3)

At least a basket into which waste water flows, a separation chamber for floating and separating oil and fat by utilizing a difference in specific gravity between water and oil, an outlet for discharging waste water to a sewer pipe, A drainage trap, which is connected to the outlet and prevents the inflow of odors and insects from the outlet downstream,
A partition plate surrounding the outflow portion including the drain trap is provided in the storage tank body, and the partition plate is locked to the inner surface on the outlet side in the storage tank body and flows out including the drain trap. A three-dimensional shape having three surfaces excluding the outlet side so as to surround the portion,
The drain trap has a vertical straight pipe portion in which a flow path is formed in a vertical direction, and a top end of the vertical straight pipe portion while maintaining a space for allowing drainage to enter from an upper end opening of the vertical straight pipe portion. Equipped with a water sealing cap that covers the part,
On the downstream side of the vertical straight pipe portion, a curved pipe portion that changes the flow of the drainage from the vertical direction to the horizontal direction is connected,
The interceptor is characterized in that the central axis of the water sealing cap is eccentric to the outlet side from the central axis of the vertical pipe portion, and is further positioned and positioned on the partition plate . The drain trap is provided so that an inner peripheral surface of the water sealing cap and an upper outer peripheral surface of the vertical straight pipe portion are in contact with each other on a side opposite to the outlet side. The interceptor according to 1. The water-sealing cap can further cover the upper end portion of the vertical straight pipe portion in a state in which the central axis is eccentric to the left or right direction from the flow path direction. Interceptor described.