CN210145667U

CN210145667U - Recycled concrete sewage sedimentation tank

Info

Publication number: CN210145667U
Application number: CN201920625156.7U
Authority: CN
Inventors: 陈志军
Original assignee: SHENGZHOU JINLONG CONCRETE Co Ltd
Current assignee: SHENGZHOU JINLONG CONCRETE Co Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-03-17
Anticipated expiration: 2029-05-05

Abstract

The utility model discloses a recycled concrete sewage sedimentation tank, which comprises a sewage tank and a treatment tank, wherein the sewage tank is positioned above the treatment tank, a permeable plate is arranged between the sewage tank and the treatment tank, the permeable plate penetrates through a driven shaft, one side of the driven shaft is fixedly connected with a driving wheel, the outer surface of the driving wheel is rotatably connected with a belt pulley, the rear side of the driven shaft is provided with a rotating shaft, one side of the rotating shaft is fixedly connected with a driven wheel, the driven wheel is rotatably connected with the other side of the belt pulley, the driven wheel is penetrated with a driven shaft, two sides of the driven shaft are fixedly connected with a first rotating rod, the top end of the first rotating rod is rotatably connected with a second rotating rod, the top end of the rotating rod is fixedly connected with a supporting rod, a baffle plate is fixedly connected between the supporting rods at two sides, one side of the, the time of separating sewage by the permeable plate can be prolonged, and the sewage purification quality is improved.

Description

Recycled concrete sewage sedimentation tank

Technical Field

The utility model relates to a deposit technical field, in particular to recycled concrete sewage sedimentation tank.

Background

At the construction site, after concrete tank car finishes concrete transportation work, need to wash the concrete that remains on the tank car automobile body or in the agitator tank, the staff drives the tank car to special concrete separation tank department and washs the tank car usually, concrete that contains in the lotion after wasing can recycle, generally collect deposit (but recycle's grit and cement) after separating solid and liquid step by step through the separation tank, but when collecting the solid, the staff shovels the cement to separation tank one side and shovels out the separation tank again through using the shovel, its work efficiency is low, to the cement of separation tank bottom or glue the cement at the separation tank inner wall, the staff need get into the separation tank and shovels the collection with the cement, its operation is not convenient, high labor strength.

According to chinese patent publication No. CN207641055U, a sedimentation tank is disclosed, including the cell body, be provided with the mounting bracket on the cell body lateral wall, the slip is provided with two filters that are used for filtering aquatic debris on the mounting bracket, and two filters separate into pond one, pond two that rivers loop through with the cell body, pond one and pond two are the step form that rises in proper order, are provided with the mechanism of drawing water that is used for taking the water in pond two out on the pond two, and the mechanism of drawing water includes the outlet pipe of wearing to establish on the apron, connects the water pump that is used for drawing water on the outlet pipe, and outlet pipe water inlet department is provided with.

However, in the above scheme, the sandstone and the moisture carried out are naturally precipitated and separated, the precipitation time is too long due to the mode, the precipitation separation efficiency is not high, and the waste recycling period is too long, so that a solution is provided below for the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a recycled concrete sewage sedimentation tank has the advantage that precipitation separation efficiency is fast, and purification efficiency is high.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a recycled concrete sewage sedimentation tank comprises a sewage tank and a treatment tank, wherein the sewage tank is positioned above the treatment tank, a water outlet is formed in the bottom of the sewage tank, a water permeable plate is arranged between the sewage tank and the treatment tank and positioned under the water outlet, a driven shaft penetrates through the water permeable plate, a driving wheel is fixedly connected to one side of the driven shaft, the outer surface of the driving wheel is rotatably connected with a belt pulley, the rear side of the driven shaft is provided with a rotating shaft, one side of the rotating shaft is fixedly connected with a driven wheel, the driven wheel is rotatably connected with the other side of the belt pulley, a driven shaft penetrates through the driven wheel, the two sides of the driven shaft are fixedly connected with a rotating rod I, the top end of the rotating rod I is rotatably connected with a rotating rod II, the top end of the rotating rod is fixedly connected with a, the baffle both sides fixedly connected with movable pulley, the driven shaft is kept away from action wheel one side fixedly connected with passive structure, passive structure one side fixedly connected with passive board, the sliding tray has been seted up on the passive board surface, sliding connection has the slider in the sliding tray, passive structure is kept away from action wheel one side and is provided with the initiative structure, initiative structure one side fixedly connected with initiative strip, the length of initiative strip is half of the length of sliding tray, initiative strip top fixedly connected with initiative piece, initiative piece and slider cooperation, initiative structure one side is rotated and is connected with and is used for the driven motor.

By adopting the technical scheme, the permeable plate can separate sand and moisture contained in sewage flowing out of the water outlet, the sand and the moisture are remained on the surface of the permeable plate, the moisture flows downwards into the treatment, the motor is started, the motor output shaft drives the driving block in the driving structure to do circular motion, when the driving block rotates to be connected with the sliding block, the driving block drives the sliding block to do circular motion, when the sliding block rotates to the top end of the sliding rail, the sliding block automatically slides downwards to the bottom end of the sliding rail due to the influence of gravity, so that the driving block cannot drive the driving block to passively rotate, when the driving block rotates to the bottom end, the driving block is connected with the sliding block again to drive the sliding block to rotate, the driving block rotates for a circle and the sliding block rotates for a half circle, so that the sliding block rotates discontinuously, because the sliding block rotates discontinuously, the subsequent rotating structure both runs discontinuously, and, the driven shaft drives the permeable plate to run discontinuously, which can prolong the separation of sand and water in the sewage by the permeable plate and improve the purification effect, meanwhile, the driven shaft drives the driving wheel to rotate discontinuously, the driving wheel drives the driven wheel to rotate through the belt pulley, the driven wheel drives the driven shaft to rotate, the driven shaft drives the rotating rod to rotate, when the first rotating rod drives the second rotating rod to rotate circumferentially and the first rotating rod drives the second rotating rod to be close to one side of the motor, the second rotating rod drives the baffle plate to move forwards through the support rod, when the first rotating rod drives the second rotating rod to be far away from one side of the motor, the second rotating rod drives the baffle plate to move backwards through the support rod, because dwang two carries out the discontinuity and rotates, the baffle carries out synchronous discontinuity operation with the porous disk for the baffle can be discontinuous block the outlet and open the sewage mouth and excrete, make things convenient for grit and moisture in the porous disk separation sewage.

As preferred, the treatment tank includes purifying tank and grit pond, the equal symmetry in purifying tank top both ends is provided with fixed horizontal pole, fixed horizontal pole includes preceding fixed horizontal pole and back fixed horizontal pole, preceding fixed horizontal pole is two with back fixed horizontal pole quantity, the vertical fixedly connected with front connecting rod in preceding fixed horizontal pole top, one side the motor output shaft has been cup jointed to the front connecting rod top, the opposite side the driven shaft has been cup jointed to the front connecting rod, the vertical fixedly connected with back connecting rod in back fixed horizontal pole top, both sides the back connecting rod has been cup jointed the driven shaft.

Adopt above-mentioned technical scheme, can fixed motor and porous disk through preceding connecting rod, stability when improving the motor operation and the porous disk rotates, the driven shaft can be fixed to the back connecting rod for it is more steady when the driven shaft operates.

Preferably, the two sides of the water outlet are provided with slide rails, the two sides of the baffle are fixedly connected with slide wheels, and the slide wheels are in sliding connection with the slide rails.

By adopting the technical scheme, the sliding wheels move in the sliding mode, so that the fluency of the baffle in the moving process can be improved, and meanwhile the sliding wheels support the baffle.

Preferably, the treatment pool comprises a purification pool and a gravel pool, permeable plates are arranged above the purification pool and the gravel pool, a filter plate is rotatably connected to the top of the same pool wall of the purification pool and the gravel pool, and the filter plate is arranged in an inclined mode by taking one side close to the gravel pool as the highest point.

Adopt above-mentioned technical scheme, the grit after the porous disk separation can fall into the grit pond automatically, and the filter can separate the sewage after the porous disk separation once more, and the grit of sewage remains in the filter up end, remains in the grit of filter up end with the automatic sliding in grit pond, moisture inflow purification tank in.

As preferred, grit pond inside pool wall fixedly connected with liquid level sensor, grit pond outside pool wall fixedly connected with and liquid level sensor electric connection's suction pump, the end fixed connection drinking-water pipe of intaking of suction pump, the drinking-water pipe other end is located inside the grit pond, suction pump opposite side fixedly connected with conveyer pipe, conveyer pipe and effluent water sump intercommunication.

Adopt above-mentioned technical scheme, when the porous disk rotated, can go into the grit pond with a small amount of hosepipes in, detect the liquid level through level sensor and be higher than when setting for the liquid level automatic transmission for the suction pump signal, the suction pump begins to extract the moisture in the grit pond through the drinking-water pipe, until the moisture liquid level in the grit pond is less than and sets for the liquid level, the water of extraction carries out the repeated filtration in passing through conveyer pipe flow direction sewage pond.

Preferably, the equal fixedly connected with spout in grit bottom both ends of pool, spout surface sliding connection has the grit case, the grit pond is close to grit case one side and articulates there is the pond board, the pond board area is the same with grit case area.

Adopt above-mentioned technical scheme, conveniently pull out the grit case through setting up outside pulling pool board and handle the grit, the grit case is conveniently removed to the slide rail, and the grit case is conveniently concentrated and is collected the processing grit, and the leakproofness in grit pond can be guaranteed to the pool board.

Preferably, a drain pipe is arranged on one side of the purification tank, which is far away from the sandstone tank, and an activated carbon plate is fixedly connected in the drain pipe.

Adopt above-mentioned technical scheme, the drain pipe can discharge the moisture in the purification tank, and the grit that contains in the active carbon board can the adsorbed moisture improves purifying effect.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is an exploded view of an embodiment;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is a sectional view of the embodiment.

Reference numerals: 1. a sewage tank; 2. a water permeable plate; 3. a driven shaft; 4. a driving wheel; 5. a belt pulley; 6. a rotating shaft; 7. a driven wheel; 8. a driven shaft; 9. rotating the first rod; 10. rotating the second rod; 11. a support bar; 12. a baffle plate; 13. a sliding wheel; 14. a passive structure; 1401. a passive plate; 1402. a sliding groove; 1403. a slider; 15. an active structure; 1501. an active strip; 1502. an active block; 16. an electric motor; 17. fixing the cross bar; 1701. a front fixed cross bar; 1702. a rear fixed cross bar; 1703. a front connecting rod; 1704. a rear connecting rod; 18. a water outlet; 19. a slide rail; 20. a treatment tank; 21. a purification tank; 22. a sand-stone pool; 23. a filter plate; 24. a liquid level sensor; 25. a water pump; 26. a water pumping pipe; 27. a delivery pipe; 28. a chute; 29. a sand box; 30. a pool plate; 31. a drain pipe; 32. an activated carbon plate.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

As shown in fig. 1 to 4, a recycled concrete sewage sedimentation tank comprises a sewage tank 1 and a treatment tank 20, wherein the sewage tank 1 is located above the treatment tank 20, a water outlet 18 is formed in the bottom of the sewage tank 1, a water permeable plate 2 is arranged between the sewage tank 1 and the treatment tank 20, the water permeable plate 2 is located under the water outlet 18, the water permeable plate 2 can separate sand and moisture from sewage flowing out of the water outlet 18, the sand and the moisture are remained on the surface of the water permeable plate 2, and the moisture flows downwards into the treatment tank.

The porous disk 2 runs through driven

shaft

3, 3 one side fixedly connected with action wheel 4 of driven shaft, 4 surface rotations of action wheel are connected with belt pulley 5, 3 rear sides of driven shaft set up axis of

rotation

6, 6 one side fixedly connected with of axis of rotation follow driving wheel 7, it is connected to rotate from driving wheel 7 with belt pulley 5 opposite side, wear to be equipped with driven shaft 8 from driving wheel 7, 8 both sides fixedly connected with dwang 9 of driven shaft, 9 top of dwang is rotated and is connected with dwang two 10, 10 top fixedly connected with bracing pieces 11 of dwang, fixedly connected with baffle 12 between the bracing piece 11 of both sides, 12 both sides fixedly connected with movable pulley 13 of baffle, outlet 18 both sides are provided with

slide rail

19, 12 both sides fixedly connected with movable pulley 13 of baffle,

movable pulley

13 and 19 sliding connection, the smooth degree when movable pulley 13 removes baffle 12 in the slip can improve, simultaneously movable pulley 13 plays.

Driven shaft 3 is far away from 4 one side fixedly connected with passive structure 14 of action wheel, 14 one side fixedly connected with passive board 1401 of passive structure, sliding tray 1402 has been seted up on passive board 1401 surface, sliding tray 1402 sliding connection has slider 1403, slider 1403 is located the sliding tray 1402 top, it can freely slide to the sliding tray 1402 bottom to receive the influence of gravity, passive structure 14 is far away from 4 one side of action wheel and is provided with

initiative structure

15, 15 one side fixedly connected with initiative strip 1501 of initiative structure, the length of initiative strip 1501 is half of the length of sliding tray 1402, initiative strip 1501 top fixedly connected with initiative piece 1502, initiative piece 1502 cooperates with

slider

1403, 15 one side of initiative structure is rotated and is connected with and is used for driven motor 16. Starting the motor 16, driving the driving strip 1501 on the driving structure 15 to do circular motion by the output shaft of the motor 16, driving the driving block 1502 to do circular motion by the driving strip 1501, when the driving block 1502 contacts the sliding block 1403, the driving block 1502 drives the sliding block 1403 to do circular motion, the sliding block 1403 drives the driven plate 1401 to do circular motion by the driven plate 14, when the sliding block 1403 is driven to the top end of the sliding groove 1402 by the driving block 1502, the sliding block 1403 automatically falls to the bottom end of the sliding groove 1402 under the influence of gravity, the driving block 1502 is separated from the sliding block 1403, the driven structure 14 stops circular motion, when the driving block 1502 rotates to the bottom end, the sliding block 1403 is driven to do circular motion by the contact with the sliding block 1403 again, so that the driving structure 15 rotates for one circle, the driven structure 14 rotates twice to form discontinuous operation, and because the driven structure 14 does discontinuous operation, the subsequent rotating structures, the driven structure 14 drives the driven shaft 3 to operate, and the driven shaft 3 can drive the water permeable plate 2 to operate.

When the driven shaft 3 rotates, the driven shaft 3 drives the driving wheel 4 to rotate, the driving wheel 4 drives the driven wheel 7 to rotate through the belt pulley 5, the driven wheel 7 drives the driven shaft 8 to rotate, the driven shaft 8 drives the first rotating rods 9 on two sides to do circular motion, when the first rotating rods 9 drive the second rotating rods 10 to do circular motion, and the first rotating rods 9 drive the second rotating rods 10 to be close to one side of the driven shaft 3, the second rotating rods 10 drive the baffle plate 12 to move forwards through the supporting rods 11, because the baffle plate 12 is tightly attached to the lower part of the water outlet 18, the area of the baffle plate 12 covering the water outlet 18 is gradually increased, the flow of the water outlet 18 is gradually reduced, when the first rotating rods 9 drive the second rotating rods 10 to be far away from one side of the driven shaft 3, the second rotating rods 10 drive the baffle plate 12 to move backwards through, the flow of the water outlet 18 can be controlled by moving the baffle plate 12 back and forth, the baffle plate 12 and the permeable plate 2 are synchronously operated through the belt pulley 5, when the baffle plate 12 gradually leaves the water outlet 18, the sewage discharge amount of the water outlet 18 is gradually increased, the permeable plate 2 and the baffle plate 12 are gradually in a parallel state, the permeable plate 2 can separate sand and moisture in sewage, sand and stone are remained on the upper end surface of the permeable plate 2, when the permeable plate 2 and the baffle plate 12 are parallel, the driving block 1502 is separated from the slide block 1403, the permeable plate 2 stops rotating for a period of time, meanwhile, the baffle plate 12 is far away from the water outlet 18, the sand and moisture in sewage separated by the permeable plate 2 are prolonged, then the slide block 1403 is driven to rotate again actively, the permeable plate 2 with sand and stone continues rotating, the baffle plate 12 also gradually covers the water outlet 18, the sewage discharge amount of the water outlet 18 is gradually reduced, the sand automatically falls down and the flap 12 completely covers the drain opening 18 and the drain opening 18 no longer continues to drain. So set up, grit is avoided blockking up and is slowed down separation efficiency in the hole of permeating water can not be remained on its surface to discontinuity upset porous disk 2 for sewage separation efficiency improves the quality of sewage separation every time.

The equal symmetry in purification pond 21 top both ends is provided with fixed horizontal pole 17, fixed horizontal pole 17 is including preceding fixed horizontal pole 1701 and back fixed horizontal pole 1702, preceding fixed horizontal pole 1701 is two with back fixed horizontal pole 1702 quantity, connecting rod 1703 before the vertical fixedly connected with in preceding fixed horizontal pole 1701 top, connecting rod 1703 has cup jointed the 16 output shaft of motor before one side, connecting rod 1703 has cup jointed driven shaft 3 before the opposite side, connecting rod 1704 after the vertical fixedly connected with in back fixed horizontal pole 1702 top, connecting rod 1704 has cup jointed driven shaft 8 behind both sides, preceding connecting rod 1703 can fixed motor 16 and water permeable plate 2, stability when improving motor 16 operation and water permeable plate 2 and rotate, driven shaft 8 can be fixed to back connecting rod 1704, make driven shaft 8 more steady when moving.

Handle pond 20 including purifying tank 21 and grit pond 22, purifying tank 21 all is provided with the porous disk 2 with grit pond 22 top, purifying tank 21 rotates with the same pool wall top in grit pond 22 and is connected with filter 23, filter 23 is the slope setting of peak with being close to grit pond 22 one side, grit after 2 separations of porous disk can fall into grit pond 22 automatically, filter 23 can separate the sewage after 2 separations of porous disk once more, the grit of sewage remains in the filter 23 up end, the grit of remaining on the filter 23 up end will automatic sliding into grit pond 22 in, moisture flows into in purifying tank 21.

Pool wall fixedly connected with liquid level sensor 24 in grit pond 22, grit pond 22 outside pool wall fixedly connected with and liquid level sensor 24 electric connection's suction pump 25, the end fixed connection drinking-water pipe 26 that intakes of suction pump 25, the drinking-water pipe 26 other end is located grit pond 22 inside, suction pump 25 opposite side fixedly connected with conveyer pipe 27, conveyer pipe 27 and effluent water sump 1 intercommunication, when porous disk 2 rotates, can bring a small amount of water into in grit pond 22, detect that the liquid level is higher than and set for the liquid level through liquid level sensor 24 and transmit for the suction pump 25 signal automatically, suction pump 25 begins to extract the moisture in grit pond 22 through drinking-water pipe 26, until the moisture liquid level in grit pond 22 is less than and sets for the liquid level, the water of extraction carries out repeated filtration in flowing to effluent water sump 1 through conveyer pipe 27.

The equal fixedly connected with spout 28 in grit pond 22 bottom both ends, spout 28 surface sliding connection has grit case 29, and grit pond 22 is close to that grit case 29 one side is articulated to have a pool board 30, and pool board 30 area is the same with grit case 29 area, through setting up the convenient grit case 29 of pulling out of outside pulling pool board 30 and handle the grit, slide rail 19 conveniently removes grit case 29, and grit case 29 is conveniently concentrated and is collected and handle the grit, and the leakproofness of grit pond 22 can be guaranteed to pool board 30.

The purification tank 21 is kept away from grit pond 22 one side and has been seted up drain pipe 31, and fixedly connected with active carbon plate 32 in the drain pipe 31, the moisture in the purification tank 21 can be discharged to drain pipe 31, and the grit that contains in the active carbon plate 32 can adsorb moisture improves purifying effect.

Claims

1. The recycled concrete sewage sedimentation tank comprises a sewage tank (1) and a treatment tank (20), and is characterized in that the sewage tank (1) is positioned above the treatment tank (20), a water outlet (18) is formed in the bottom of the sewage tank (1), a water permeable plate (2) is arranged between the sewage tank (1) and the treatment tank (20), the water permeable plate (2) is positioned under the water outlet (18), a driven shaft (3) penetrates through the water permeable plate (2), a driving wheel (4) is fixedly connected to one side of the driven shaft (3), a belt pulley (5) is rotatably connected to the outer surface of the driving wheel (4), a rotating shaft (6) is arranged on the rear side of the driven shaft (3), a driven wheel (7) is fixedly connected to one side of the rotating shaft (6), the driven wheel (7) is rotatably connected to the other side of the belt pulley (5), and a driven shaft (8) is penetrated through the driven wheel (7), the driven shaft (8) is fixedly connected with a first rotating rod (9) on two sides, the top end of the first rotating rod (9) is rotatably connected with a second rotating rod (10), the top end of the second rotating rod (10) is fixedly connected with a supporting rod (11), the two sides of the supporting rod (11) are fixedly connected with a baffle (12), the baffle (12) is tightly attached to the lower part of a water outlet (18), one side of the driven shaft (3) far away from the driving wheel (4) is fixedly connected with a driven structure (14), one side of the driven structure (14) is fixedly connected with a driven plate (1401), the surface of the driven plate (1401) is provided with a sliding groove (1402), the sliding groove (1402) is internally connected with a sliding block (1403) in a sliding manner, one side of the driven structure (14) far away from the driving wheel (4) is provided, the length of the driving strip (1501) is half of the length of the sliding groove (1402), the top end of the driving strip (1501) is fixedly connected with a driving block, the driving block is matched with the sliding block (1403), and one side of the driving structure (15) is rotatably connected with a motor (16) used for driving.

2. The recycled concrete sewage sedimentation basin according to claim 1, the treatment tank (20) comprises a purification tank (21) and a gravel tank (22), fixed cross rods (17) are symmetrically arranged at both ends above the purification tank (21), the fixed crossbar (17) comprises a front fixed crossbar (1701) and a rear fixed crossbar (1702), the number of the front fixed cross bar (1701) and the number of the rear fixed cross bar (1702) are both two, the top end of the front fixed cross bar (1701) is vertically and fixedly connected with a front connecting rod (1703), the top end of the front connecting rod (1703) at one side is sleeved with an output shaft of a motor (16), the front connecting rod (1703) at the other side is sleeved with a driven shaft (3), the top end of the rear fixed cross rod (1702) is vertically and fixedly connected with a rear connecting rod (1704), and the rear connecting rods (1704) on two sides are sleeved with a driven shaft (8).

3. The recycled concrete sewage sedimentation tank according to claim 2, wherein slide rails (19) are arranged on both sides of the water discharge port (18), slide wheels (13) are fixedly connected to both sides of the baffle plate (12), and the slide wheels (13) are slidably connected with the slide rails (19).

4. The recycled concrete sewage sedimentation tank according to claim 3, wherein a filter plate (23) is rotatably connected to the top of the tank wall at the same position of the purification tank (21) and the gravel tank (22), and the filter plate (23) is obliquely arranged with the highest point close to one side of the gravel tank (22).

5. The recycled concrete sewage sedimentation tank of claim 4, wherein the tank wall inside the gravel tank (22) is fixedly connected with a liquid level sensor (24), the tank wall outside the gravel tank (22) is fixedly connected with a water suction pump (25) electrically connected with the liquid level sensor (24), the water inlet end of the water suction pump (25) is fixedly connected with a water suction pipe (26), the other end of the water suction pipe (26) is located inside the gravel tank (22), the other side of the water suction pump (25) is fixedly connected with a delivery pipe (27), and the delivery pipe (27) is communicated with the sewage tank (1).

6. The recycled concrete sewage sedimentation tank according to claim 5, wherein sliding grooves (28) are fixedly connected to both ends of the bottom of the gravel pool (22), gravel boxes (29) are slidably connected to the surfaces of the sliding grooves (28), a pool plate (30) is hinged to one side, close to the gravel boxes (29), of the gravel pool (22), and the area of the pool plate (30) is the same as that of the gravel boxes (29).

7. The recycled concrete sewage sedimentation tank according to claim 6, wherein a drain pipe (31) is provided at a side of the purification tank (21) away from the gravel tank (22), and an activated carbon plate (32) is fixedly connected in the drain pipe (31).