CN213144086U - Water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure - Google Patents

Abstract

The utility model discloses a semi-automatic factory of economizing on water sprays and encloses fender with making an uproar dust removal, it sprays and encloses fender technical field to relate to the dust removal, for solving current factory with enclosing that keep off noise reduction is not good enough, and when removing dust through spray set, and avoid the water level low excessively to cause the high-pressure pump to inhale futilely and damage, thereby it often goes to observe the water storage box water level to need the staff, make the staff too tired, thereby it can not retrieve the problem of water conservation inadequately to enclose the fender after spraying now. The fixed fender body that encloses that is provided with in one side of base top, the preceding terminal surface that encloses the fender body all fixes with the rear end face and is provided with the abatvoix, the front end that encloses the fender body is provided with retrieves the frame, and retrieves frame and base fixed connection, retrieve the rear end face of frame and enclose the abatvoix laminating of keeping off the preceding terminal surface of body, the front end that encloses one side of keeping off the body is provided with retaining mechanism, the fixed connecting block that is provided with in top of terminal surface before the abatvoix, and the connecting block is provided with four.

Description

Water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure

Technical Field

The utility model relates to a remove dust and spray and enclose fender technical field, specifically be a semi-automatic factory of water conservation sprays and encloses the fender with falling the dust removal of making an uproar.

Background

On the other side of the highway, the going of coming and going vehicle can produce the raise dust, and the raise dust can be along with the air a large amount of drift to the factory inside, thereby make the inside air quality variation in factory, and the vehicle on the highway traveles and can produce great noise, the noise can influence the official working of the inside personnel in factory, consequently must control and reduce the other raise dust and the noise of highway, mainly take at present to enclose around the factory to keep off and block noise and dust, and the fence in factory installs spray set, thereby combine through the raise dust in spray set spun water smoke and the air, thereby make the specific gravity increase of raise dust fall into the building site, reduce the pollution to the environment.

The existing enclosure for the plant area has poor noise reduction effect, and when dust is removed through a spraying device, the damage caused by dry suction of a high-pressure pump due to too low water level is avoided, so that a worker is required to frequently observe the water level of a water storage tank, the worker is too tired, and the existing enclosure cannot recover water after spraying, so that water is not saved; therefore, the existing requirements are not met, and a water-saving semi-automatic plant area noise-reducing and dust-removing spraying enclosure is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a semi-automatic factory of water conservation sprays and encloses fender with making an uproar dust removal to current factory that proposes in solving above-mentioned background art is with enclosing that to keep off noise reduction effect not good enough, and when removing dust through spray set, and avoid the water level low excessively to cause the high-pressure pump to inhale futilely and damage, thereby it often goes to observe the water storage box water level to need the staff, make the staff too tired, thereby it can not retrieve the problem of water conservation inadequately to enclose the fender after spraying now.

In order to achieve the above object, the utility model provides a following technical scheme: a noise-reducing, dust-removing and spraying enclosure for a water-saving semi-automatic factory comprises a base, an enclosure body is fixedly arranged on one side above the base, acoustic panels are fixedly arranged on the front end face and the rear end face of the enclosure body, a recovery frame is arranged at the front end of the enclosure body and fixedly connected with the base, the rear end face of the recovery frame is attached to the acoustic panels on the front end face of the enclosure body, a water storage mechanism is arranged at the front end of one side of the enclosure body, connecting blocks are fixedly arranged above the front end face of the acoustic panels, four connecting blocks are arranged, connecting holes are formed in the four connecting blocks, a guide pipe is arranged between the connecting holes, the four guide pipes are arranged, one ends of the four guide pipes are fixedly connected with each other through tee joints respectively, the outer walls of the guide pipes are inserted in the connecting holes, a spraying pipe is arranged above the guide pipes, and one end of the spray pipe is fixedly connected with the guide pipe through a three-way joint, and a spray head is fixedly arranged above the spray pipe.

Preferably, retaining mechanism comprises water storage box, high pressure water pump, drinking-water pipe, inlet tube, mounting panel and PLC controller, water storage box fixed connection is in one side of base top, and the water storage box is located the front end that encloses fender body one side, high pressure water pump fixed mounting is in the top of water storage box, flange fixed connection is passed through with high pressure water pump's water inlet to the one end of drinking-water pipe, the other end of drinking-water pipe extends to the inside below of water storage box, inlet tube fixed connection is in the top of water storage box one side, mounting panel fixed connection is in one side of water storage box up end, PLC controller fixed connection is in the top of mounting panel.

Preferably, the fixed installation piece that is provided with of top inner wall of water storage box, the below fixed mounting of installation piece has electronic type level gauge, and electronic type level gauge's probe extends to the inside below of water storage box, pass through wire electric connection between electronic type level gauge and the PLC controller, one side of water storage box is provided with the storage water tank, and storage water tank and base fixed connection, the other end of inlet tube extends to the inside below of storage water tank, the storage water tank link up mutually through the inlet tube with the inside of water storage box, be provided with the suction pump between water storage box and the storage water tank, and suction pump fixed mounting is on the body of inlet tube, flange fixed connection is passed through with the delivery port of high pressure water pump to the one end of pipe.

Preferably, the fixed pipe that is provided with in top of storage water tank, the fixed cover that intakes that is provided with in top of fixed pipe, the inside of the cover that intakes link up mutually through fixed pipe with the inside of storage water tank, the inner wall of the cover that intakes is fixed respectively with the inside of retrieving the frame and is provided with the grafting piece, and the grafting piece is provided with four respectively, four the inserting groove has all been seted up to the inside of grafting piece, the inside of the cover that intakes all is provided with first filtration cotton board with the inside of retrieving the frame, the below of first filtration cotton board is provided with the second and filters cotton board, and the both sides of first filtration cotton board and second filtration cotton board are all pegged graft in the inside of inserting groove.

Preferably, the fixed raceway that is provided with in top of storage water tank one side, and the inside of raceway link up with the inside of storage water tank mutually, the one end threaded connection of raceway has sealed lid, retrieve the preceding terminal surface of frame and the preceding terminal surface of cover that intakes and all seted up logical groove, the front end that leads to the groove is provided with the apron, the apron passes through screw fixed connection with intake cover and recovery frame respectively, the rear end face of apron is fixed to be provided with sealed glue, and sealed glue laminate with the preceding terminal surface of intake cover and recovery frame respectively.

Preferably, retrieve the fixed connecting pipe that is provided with in below of frame one side, and the other end of connecting pipe and the outer wall fixed connection of water storage box, retrieve the inside of frame and water storage box and link up mutually through the connecting pipe, the below inner wall of retrieving the frame is the hypotenuse, and retrieves the hypotenuse of frame below inner wall and to the slope of water storage box direction, the fixed drain pipe that is provided with in top of water storage box rear end, and the inside of drain pipe and the inside of water storage box link up mutually, the one end threaded connection of drain pipe has sealed lid.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a through enclosing preceding terminal surface and the rear end face of keeping off the body and all fixedly being provided with the abatvoix, because the abatvoix has the characteristics of initiatively inhaling the sound, thereby absorb the noise through the characteristics of abatvoix, thereby make the noise that spreads into the interior of factory diminish, avoid the too big official working that influences personnel in the interior of factory of vehicle on the highway driving noise, and through setting up retaining mechanism, storage water tank, inlet tube, suction pump, electronic type level gauge, PLC controller, pipe, shower and atomising head, thereby when needing the spraying dust fall, can be through starting high pressure water pump, high pressure water pump pumps the water in the water storage box to the inside of pipe through the suction pipe, and produce high pressure rivers, spout high pressure rivers through shower and atomising head, thereby through spraying the dust fall, and liquid level electronic type ware can monitor the water level in the water storage box, when the inside water level of water storage box descends to the water inlet that is close to the drinking-water pipe, electronic type level gauge can be with signal transmission to the inside of PLC controller, thereby later the PLC controller can open the suction pump, thereby extract the inside water of storage water tank to the inside of water storage box through suction pump and inlet tube, thereby avoid the inside water level of water storage box to hang down excessively, make the high pressure water pump dry suction and damage, thereby the water storage box can be intake according to the water level automatically, need not the inside water level of staff's regular observation water storage box, thereby make the more automation of device, make staff's light more.

2. By arranging the recovery frame, the water inlet cover, the first filtering cotton plate and the second filtering cotton plate, after the water is sprayed out by the spray head, the spray water can carry dust to fall into the recovery frame, so that the spray water can be filtered by the first filtering cotton plate and the second filtering cotton plate, the dust in the spray water can be filtered and stays above the first filtering cotton plate and the second filtering cotton plate, the filtered spray water can flow to the inside of the connecting pipe through the bevel edge of the inner wall below the recovery frame, and then flows to the inside of the water storage tank through the connecting pipe, thereby reducing the loss of the spray water, recycling part of the spray water, achieving the purpose of saving water, and by arranging the water inlet cover, when raining, the rainwater can enter the water storage tank through the water inlet cover to be stored, so that the device saves resources more, and set up first filtration cotton board and the cotton board of second filtration through the inside at the cover of intaking to impurity that can avoid in the rainwater and the outside air enters into the inside of storage water tank, thereby cause the inlet tube to block up.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is a schematic top view of the water storage tank and water storage tank of the present invention;

FIG. 4 is a schematic view of a top-down structure of the recycling frame of the present invention;

FIG. 5 is a schematic top view of the water inlet cover of the present invention;

fig. 6 is a schematic view of the right side structure of the connecting block of the present invention;

FIG. 7 is a schematic view of the recycling frame and the cover plate of the present invention;

FIG. 8 is a schematic view of the structure of the cover plate and the water inlet cover of the present invention;

in the figure: 1. a base; 2. a fence body; 3. a sound-absorbing panel; 4. a recovery frame; 5. a water storage mechanism; 6. connecting blocks; 7. connecting holes; 8. a conduit; 9. a three-way joint; 10. a shower pipe; 11. a spray head; 12. mounting blocks; 13. an electronic level gauge; 14. a water storage tank; 15. a water pump; 16. a fixed tube; 17. a water inlet cover; 18. an insertion block; 19. inserting grooves; 20. a first filter cotton sheet; 21. a second filter cotton plate; 22. a water delivery pipe; 23. a sealing cover; 24. a through groove; 25. a cover plate; 26. sealing glue; 27. a connecting pipe; 28. a drain pipe; 501. a water storage tank; 502. a high pressure water pump; 503. a water pumping pipe; 504. a water inlet pipe; 505. mounting a plate; 506. a PLC controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-8, the present invention provides an embodiment: a water-saving semi-automatic plant area noise-reducing dust-removing spraying enclosure comprises a base 1, an enclosure body 2 is fixedly arranged on one side above the base 1, acoustic panels 3 are fixedly arranged on the front end face and the rear end face of the enclosure body 2, the acoustic panels 3 can absorb noise on a road so as to reduce noise entering a plant area, a recovery frame 4 is arranged at the front end of the enclosure body 2, the recovery frame 4 is fixedly connected with the base 1, the rear end face of the recovery frame 4 is attached to the acoustic panels 3 on the front end face of the enclosure body 2, a water storage mechanism 5 is arranged at the front end of one side of the enclosure body 2, connecting blocks 6 are fixedly arranged above the front end face of the acoustic panels 3, four connecting holes 7 are formed in the four connecting blocks 6, guide pipes 8 are arranged among the connecting holes 7, the guide pipes 8 are provided with four guide pipes 8, one ends of the four guide pipes 8 are fixedly connected with each other through three-way joints 9 respectively, and the outer wall of the conduit 8 is inserted in the connecting hole 7, a spray pipe 10 is arranged above the conduit 8, one end of the spray pipe 10 is fixedly connected with the conduit 8 through a three-way joint 9, and a spray head 11 is fixedly arranged above the spray pipe 10.

Further, the water storage mechanism 5 comprises a water storage tank 501, a high-pressure water pump 502, a water pumping pipe 503, a water inlet pipe 504, a mounting plate 505 and a PLC (programmable logic controller) 506, wherein the water storage tank 501 is fixedly connected to one side above the base 1, the water storage tank 501 is located at the front end of one side of the enclosure body 2, the high-pressure water pump 502 is fixedly mounted above the water storage tank 501, one end of the water pumping pipe 503 is fixedly connected with a water inlet of the high-pressure water pump 502 through a flange, the other end of the water pumping pipe 503 extends to the lower portion inside the water storage tank 501, the water inlet pipe 504 is fixedly connected to the upper portion of one side of the water storage tank 501, the mounting plate 505 is fixedly connected to one side of the upper end face of the water storage tank 501, the PLC.

Further, the upper inner wall of the water storage tank 501 is fixedly provided with an installation block 12, the lower part of the installation block 12 is fixedly provided with an electronic type liquid level device 13, the model of the electronic type liquid level device 13 is BZ2402, a probe of the electronic type liquid level device 13 extends to the lower part inside the water storage tank 501, the electronic type liquid level device 13 is electrically connected with the PLC controller 506 through a lead, one side of the water storage tank 501 is provided with a water storage tank 14, the water storage tank 14 is fixedly connected with the base 1, the other end of the water inlet pipe 504 extends to the lower part inside the water storage tank 14, the water storage tank 14 is mutually communicated with the inside of the water storage tank 501 through the water inlet pipe 504, a water suction pump 15 is arranged between the water storage tank 501 and the water storage tank 14, the water suction pump 15 is fixedly installed on the pipe body of the.

Further, the fixed pipe 16 that is provided with in top of storage water tank 14, the fixed cover 17 that intakes that is provided with in top of fixed pipe 16, the inside of cover 17 that intakes is link up mutually through fixed pipe 16 with the inside of storage water tank 14, the inner wall of cover 17 that intakes is fixed respectively with the inside of retrieving frame 4 and is provided with the grafting piece 18, and grafting piece 18 is provided with four respectively, inserting groove 19 has all been seted up to the inside of four grafting pieces 18, the inside of cover 17 that intakes and the inside of retrieving frame 4 all are provided with first filtration cotton board 20, the below of first filtration cotton board 20 is provided with second filtration cotton board 21, and the inside at inserting groove 19 is all pegged graft to the both sides of first filtration cotton board 20 and second filtration cotton board 21, the filtration cotton material of first filtration cotton board 20 is the first filtration cotton, the filtration cotton material of second filtration cotton board 21 is the medium efficiency filtration cotton.

Further, the fixed raceway 22 that is provided with in top of storage water tank 14 one side, and the inside of raceway 22 and storage water tank 14's inside link up mutually, the one end threaded connection of raceway 22 has sealed lid 23, through setting up raceway 22, thereby can add water into storage water tank 14's inside through raceway 22 and store, logical groove 24 has all been seted up with the preceding terminal surface of intaking cover 17 to the preceding terminal surface of retrieving frame 4, the front end of logical groove 24 is provided with apron 25, apron 25 passes through screw fixed connection with intaking cover 17 and retrieving frame 4 respectively, the fixed sealed glue 26 that is provided with of rear end face of apron 25, through setting up sealed glue 26, make when closing apron 25, sealed glue 26 makes the leakproofness between apron 25 and the logical groove 24 higher, and sealed glue 26 laminate with the preceding terminal surface of intaking cover 17 and retrieving frame 4 respectively.

Further, the fixed connecting pipe 27 that is provided with in below of retrieving frame 4 one side, and the other end of connecting pipe 27 and the outer wall fixed connection of water storage box 501, retrieve the inside of frame 4 and water storage box 501 and link up each other through connecting pipe 27, the below inner wall of retrieving frame 4 is the hypotenuse, and the hypotenuse of retrieving the inside wall of frame 4 below inclines to water storage box 501 direction, the fixed drain pipe 28 that is provided with in top of water storage box 501 rear end, and the inside of drain pipe 28 and the inside of water storage box 501 link up each other, the one end threaded connection of drain pipe 28 has sealed lid 23, through setting up drain pipe 28, thereby make when the rainwater enters into the inside of water storage box 501 through the inside of retrieving frame 4, the inside water of water storage box 501 is after full, the inside water of water storage box 501 can discharge through.

The working principle is as follows: when the electronic type liquid level device 13 is used, firstly, water is respectively added into the water storage tank 14 and the water storage tank 501 through the water conveying pipe 22 and the water discharging pipe 28 for storage, the upper limit height and the lower limit height monitored by the electronic type liquid level device 13 are adjusted, then, when dust fall is needed, the high-pressure water pump 502 is started, the water in the water storage tank 501 is pumped into the conduit 8 through the water pumping pipe 503 by the high-pressure water pump 502, high-pressure water flow is generated, the high-pressure water flow is sprayed out through the spraying pipe 10 and the spraying head 11, dust fall is realized through spraying, the water level in the water storage tank 501 is monitored by the electronic type liquid level device 13, when the water level in the water storage tank 501 is reduced to be close to the water inlet of the water pumping pipe 503, the electronic type liquid level device 13 transmits signals into the PLC controller 506, then, the water pumping pump 15 is started by the PLC controller 506, so that the water in the water storage tank, thereby avoiding the water level inside the water storage tank 501 from being too low, causing the high pressure water pump 502 to suck and damage, when the water level inside the water storage tank 501 reaches the upper limit height adjusted by the electronic level device 13, the electronic level device 13 will close the water pump 15 through the PLC controller 506, and after the spray head 11 sprays water, the spray water will carry dust to fall into the inside of the recovery frame 4, so that the spray water can be filtered through the first filter cotton plate 20 and the second filter cotton plate 21, causing the dust inside the spray water to be filtered and stayed above the first filter cotton plate 20 and the second filter cotton plate 21, thereby the filtered spray water can flow to the inside of the connecting pipe 27 through the bevel edge of the inner wall below the recovery frame 4, and then flow to the inside of the water storage tank 501 through the connecting pipe 27, thereby reducing the loss of the spray water, and causing a part of the spray water to be recycled, reach the purpose of water conservation, and through setting up into water cover 17, make when raining, the rainwater can enter into the inside of storage water tank 14 through into water cover 17 and store, make the device more save the resource, and through setting up first filtration cotton board 20 and the cotton board 21 of second filtration in the inside of intaking cover 17, thereby impurity in can avoiding the rainwater and the impurity in the outside air enter into the inside of storage water tank 14, thereby cause inlet tube 504 to block up, and abatvoix 3 can absorb the noise on the highway, thereby reduce the noise that gets into the factory.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a semi-automatic factory of economizing on water sprays and encloses fender with making an uproar dust removal of falling, includes base (1), its characterized in that: the acoustic board is characterized in that an enclosing body (2) is fixedly arranged on one side above the base (1), acoustic boards (3) are fixedly arranged on the front end face and the rear end face of the enclosing body (2), a recovery frame (4) is arranged at the front end of the enclosing body (2), the recovery frame (4) is fixedly connected with the base (1), the rear end face of the recovery frame (4) is attached to the acoustic boards (3) on the front end face of the enclosing body (2), a water storage mechanism (5) is arranged at the front end of one side of the enclosing body (2), connecting blocks (6) are fixedly arranged above the front end face of the acoustic boards (3), four connecting holes (7) are formed in the connecting blocks (6), guide pipes (8) are arranged between the connecting holes (7), the guide pipes (8) are arranged in four, and one ends of the four guide pipes (8) are fixedly connected with one another through tee joints (9) respectively, and the outer wall of the conduit (8) is inserted into the connecting hole (7), a spray pipe (10) is arranged above the conduit (8), one end of the spray pipe (10) is fixedly connected with the conduit (8) through a three-way joint (9), and a spray head (11) is fixedly arranged above the spray pipe (10).

2. The water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure according to claim 1, characterized in that: the water storage mechanism (5) is composed of a water storage tank (501), a high-pressure water pump (502), a water pumping pipe (503), a water inlet pipe (504), a mounting plate (505) and a PLC (programmable logic controller) (506), the water storage tank (501) is fixedly connected to one side above the base (1), the water storage tank (501) is positioned at the front end of one side of the enclosure body (2), the high-pressure water pump (502) is fixedly arranged above the water storage tank (501), one end of the water pumping pipe (503) is fixedly connected with a water inlet of the high-pressure water pump (502) through a flange, the other end of the water pumping pipe (503) extends to the lower part of the inside of the water storage tank (501), the water inlet pipe (504) is fixedly connected above one side of the water storage tank (501), the mounting plate (505) is fixedly connected with one side of the upper end surface of the water storage tank (501), the PLC controller (506) is fixedly connected above the mounting plate (505).

3. The water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure according to claim 2, characterized in that: the water storage tank is characterized in that an installation block (12) is fixedly arranged on the inner wall of the upper portion of the water storage tank (501), an electronic type liquid level device (13) is fixedly arranged below the installation block (12), a probe of the electronic type liquid level device (13) extends to the lower portion of the interior of the water storage tank (501), the electronic type liquid level device (13) is electrically connected with the PLC (506) through a lead, a water storage tank (14) is arranged on one side of the water storage tank (501), the water storage tank (14) is fixedly connected with the base (1), the other end of the water inlet pipe (504) extends to the lower portion of the interior of the water storage tank (14), the water storage tank (14) and the interior of the water storage tank (501) are communicated with each other through the water inlet pipe (504), a water suction pump (15) is arranged between the water storage tank (501) and the water storage tank (14), and the water, one end of the conduit (8) is fixedly connected with the water outlet of the high-pressure water pump (502) through a flange.

4. The water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure according to claim 3, characterized in that: the improved water storage tank is characterized in that a fixed pipe (16) is fixedly arranged above the water storage tank (14), a water inlet cover (17) is fixedly arranged above the fixed pipe (16), the inside of the water inlet cover (17) is communicated with the inside of the water storage tank (14) through the fixed pipe (16), insertion blocks (18) are fixedly arranged on the inner wall of the water inlet cover (17) and the inside of the recovery frame (4) respectively, the insertion blocks (18) are four in number respectively, insertion grooves (19) are formed in the inside of the insertion blocks (18), first filtering cotton plates (20) are arranged in the inside of the water inlet cover (17) and the inside of the recovery frame (4), second filtering cotton plates (21) are arranged below the first filtering cotton plates (20), and the two sides of the first filtering cotton plates (20) and the second filtering cotton plates (21) are arranged in the insertion grooves (19).

5. The water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure according to claim 4, characterized in that: the fixed raceway (22) that is provided with in top of storage water tank (14) one side, and the inside of raceway (22) link up with the inside of storage water tank (14) mutually, the one end threaded connection of raceway (22) has sealed lid (23), it all has seted up logical groove (24) with the preceding terminal surface of intaking cover (17) to retrieve preceding terminal surface of frame (4), the front end that leads to groove (24) is provided with apron (25), apron (25) pass through screw fixed connection with intaking cover (17) and retrieving frame (4) respectively, the rear end face of apron (25) is fixed and is provided with sealed glue (26), and sealed glue (26) laminate with the preceding terminal surface of intaking cover (17) and retrieving frame (4) respectively.

6. The water-saving semi-automatic factory noise-reducing and dust-removing spraying enclosure according to claim 1, characterized in that: retrieve the fixed connecting pipe (27) that is provided with in below of frame (4) one side, and the other end of connecting pipe (27) and the outer wall fixed connection of water storage box (501), retrieve the inside of frame (4) and water storage box (501) and link up each other through connecting pipe (27), the below inner wall of retrieving frame (4) is the hypotenuse, and retrieves the hypotenuse of frame (4) below inner wall and to water storage box (501) direction slope, the top of water storage box (501) rear end is fixed and is provided with drain pipe (28), and the inside of drain pipe (28) link up each other with the inside of water storage box (501), the one end threaded connection of drain pipe (28) has sealed lid (23).

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