CN112919703A

CN112919703A - Waste water treatment device for building engineering

Info

Publication number: CN112919703A
Application number: CN202110090754.0A
Authority: CN
Inventors: 王涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-06-08

Abstract

The invention discloses a wastewater treatment device for constructional engineering, belongs to the technical field of constructional engineering, solves the problem of poor treatment effect of the conventional wastewater treatment device for constructional engineering, and has the technical key points that: including first processing case, put into first processing incasement with waste water, first motor starts, order about movable fill reciprocating motion, the stirring turns over the board rotation and stirs, the third motor starts, order about first crushing roller and the rotatory broken handle that carries out of second crushing roller, vibrating motor drive sieve carries out vibration screening, the second motor starts, make the rotatory leading-in first collecting box of solid matter such as rubbish of flood dragon blade, the magnet stick carries out the absorption of iron fillings, first cylinder starts, order about the brush and clean, the water pump starts, extract waste water, annotate the liquid pipe and pour into the antiseptic solution, the second cylinder starts, order about the third and stir epaxial stirring leaf corotation and contrarotation of stirring, the activated carbon layer, microstrainer layer and waterproof sterilamp disinfect, have the advantage that the treatment effect is good.

Description

Waste water treatment device for building engineering

Technical Field

The invention relates to the field of constructional engineering, in particular to a wastewater treatment device for constructional engineering.

Background

The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and also can be a process of changing various lines on a design drawing into a real object at a specified place. The method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like. The site of the construction work is called a "construction site" or "job site", also called a worksite.

Can produce a lot of waste water at the in-process of building construction, direct discharge sewage can cause environmental pollution, waste water resource, current building engineering effluent treatment plant is when handling waste water, be difficult for mud in the waste water, the grit, solid impurity such as rubbish carries out shredding, and solid impurity after smashing is difficult to arrange the external world, cause solid impurity to block up purification treatment equipment easily, it is not enough to lead to purification treatment, wastewater treatment's effect has been influenced, can't satisfy the in-service use needs, it is from top to bottom visible, current effluent treatment plant for building engineering has the shortcoming that treatment effect is poor, be difficult to obtain popularization and application.

Therefore, it is necessary to provide a wastewater treatment apparatus for construction engineering, aiming at solving the above problems.

Disclosure of Invention

In view of the defects in the prior art, an embodiment of the present invention is directed to a wastewater treatment apparatus for construction engineering to solve the above problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a wastewater treatment device for construction engineering comprises a first treatment box, wherein a feed hopper is arranged on the first treatment box, a movable hopper is movably connected below the feed hopper, a first stirring shaft and a stirring turning plate which are convenient for stirring are arranged in the movable hopper, a linear reciprocating driving assembly is arranged on the outer side of the movable hopper, the linear reciprocating driving assembly comprises a second connecting rod, a roller, a cam, a first connecting rod, a movable block and a spring, the movable block is connected on a sliding rod in a sliding manner, a first gear and a first rack which are connected through a gear are arranged at two ends of the first stirring shaft, a crushing assembly is arranged below the movable hopper, the crushing assembly comprises a first crushing roller and a second crushing roller, the first crushing roller and the second crushing roller are rotationally connected through a second gear and a third gear, and a material conveying assembly is arranged below the crushing assembly, the material conveying assembly comprises a material conveying shaft and dragon blades, a sieve plate and a vibrating motor which are convenient for vibrating screening are arranged below the dragon blades, a first collecting box is communicated with one end of the sieve plate at the upper oblique direction through a pipeline, a first stirring assembly is arranged in the first collecting box and comprises a second stirring shaft and a third motor, a plurality of stirring blades are arranged on the second stirring shaft, a magnet rod which is convenient for adsorbing scrap iron is fixedly connected onto the second stirring shaft, the second stirring shaft is rotatably connected with a rotating shaft of a first crushing roller through a synchronous belt, a sand cleaning assembly is arranged below the sieve plate and comprises a first air cylinder, a brush and a sandstone filtering layer, one end of the sandstone filtering layer at the lower oblique direction is communicated with a second collecting box which is convenient for storage through a pipeline, and the bottom of the first processing box is communicated with a second processing box through a pipeline and a water pump, the second is handled and is provided with second stirring subassembly in the incasement, second stirring subassembly includes second cylinder, third (mixing) shaft, second rack and fourth gear, be provided with a plurality of stirring leaves on the third (mixing) shaft, the below of second stirring subassembly is provided with activated carbon layer, micro-filtration rete and the waterproof sterilamp of being convenient for adsorb the sterilization.

As a further scheme of the invention, the stirring turning plate is fixedly connected to a first stirring shaft, two ends of the first stirring shaft are fixedly connected with first gears, the first gears are connected with first rack gears, one side of the movable hopper is fixedly connected with a second connecting rod, the second connecting rod is connected to the inside of the first treatment box in a sliding manner, one end of the second connecting rod is rotatably connected with a roller, the roller is in contact with a cam, and the cam is fixedly connected with an output shaft of a first motor.

As a further scheme of the invention, the other side of the movable bucket is hinged with one end of a first connecting rod through a connecting plate, the other end of the first connecting rod is hinged on a movable block respectively, one side of the movable block is provided with a spring respectively, and the slide rod is fixedly connected inside the first treatment box through a mounting plate.

As a further scheme of the invention, the flood dragon blades are fixedly connected to a conveying shaft, the conveying shaft is rotatably connected to the inside of the first treatment box, one end of the conveying shaft is fixedly connected with an output shaft of a second motor, a vibration motor convenient for vibration is arranged below the sieve plate, the second stirring shaft is fixedly connected with an output shaft of a third motor, and a slag discharge door is arranged on the outer side of the first collection box.

As a further scheme of the invention, the hairbrush is fixedly connected with a piston rod of the first air cylinder, and a valve is arranged on a pipeline which is communicated with the second collecting box and obliquely below the sand filtering layer.

As a further scheme of the invention, a liquid injection pipe convenient for adding disinfectant is arranged above the second treatment box, the third stirring shaft is rotatably connected to a piston rod of the second cylinder through a bearing, two ends of the third stirring shaft are respectively and fixedly connected with a fourth gear, and the fourth gear is meshed with the second rack.

As a further scheme of the invention, one end of the bottom of the second treatment box is fixedly communicated with a liquid outlet pipe, and a valve is arranged on the liquid outlet pipe.

In summary, compared with the prior art, the embodiment of the invention has the following beneficial effects:

the invention puts the waste water into a first treatment box through a feed hopper, a first motor is started to drive a cam to rotate, a moving block at one side of a movable hopper is driven to compress a spring to move in a reciprocating way under the eccentric action of the cam, first gear wheels at two ends of a first stirring shaft are connected to a first rack while the movable hopper moves, so that a stirring turning plate in the movable hopper is driven to rotate to stir the waste water from the feed hopper, the waste water is uniformly scattered into a first crushing roller and a second crushing roller below the first crushing roller, a third motor is started to drive a second stirring shaft to rotate, the first crushing roller and the second crushing roller are driven to rotate to crush substances such as solid garbage in the waste water under the driving action of a synchronous belt and the connection relation of the second gear and the third gear wheels, a vibrating motor is started to drive a sieve plate to vibrate and sieve sand and water, and the filtered sand falls into the lower part, the second motor is started to drive the dragon blade on the conveying shaft to rotate, solid matters such as garbage and the like are guided into the first collecting box, the stirring blade on the second stirring shaft is used for stirring, the magnet rod is used for adsorbing scrap iron, the first cylinder is started to drive the brush to perform reciprocating cleaning, sand and stone are pushed into the second collecting box for collection, the water pump is started to pump wastewater at the bottom of the first processing box through a pipeline, a liquid injection pipe on the second processing box is used for injecting disinfectant, the second cylinder is started to drive the fourth gear wheels at two ends of the third stirring shaft to be connected onto the second rack, so that the stirring blade on the third stirring shaft is driven to rotate forward and backward to stir the wastewater which comes down, the wastewater is fully mixed with the disinfectant, the activated carbon layer and the microfiltration membrane layer are used for adsorption sterilization, the waterproof ultraviolet sterilization lamp is used for ultraviolet sterilization and disinfection, and healthy water is discharged from the liquid outlet pipe, has the advantage of treatment effect.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the invention.

FIG. 2 is an enlarged view of A in the example of the present invention.

FIG. 3 is an enlarged view of B in the embodiment of the present invention.

Fig. 4 is a schematic sectional structure diagram of the connection of the movable bucket in the embodiment of the invention.

FIG. 5 is a schematic sectional view showing the connection between the first crushing roller and the second crushing roller in the embodiment of the present invention.

Fig. 6 is an axial structural view of the cam in the embodiment of the invention.

Reference numerals: 1-a first treatment box, 2-a feed hopper, 3-a movable hopper, 4-a first stirring shaft, 5-a stirring turnover plate, 6-a first gear, 7-a first rack, 8-a connecting plate, 9-a first connecting rod, 10-a moving block, 11-a sliding rod, 12-a spring, 13-a second connecting rod, 14-a roller, 15-a cam, 16-a first motor, 17-a first crushing roller, 18-a second gear, 19-a third gear, 20-a second crushing roller, 21-a synchronous belt, 22-a material conveying shaft, 23-a dragon blade, 24-a second motor, 25-a sieve plate, 26-a first collecting box, 27-a third motor, 28-a second stirring shaft, 29-a magnet rod, 30-a sand filtration layer, 31-brush, 32-first cylinder, 33-water pump, 34-second collecting box, 35-second processing box, 36-second rack, 37-fourth gear, 38-third stirring shaft, 39-second cylinder, 40-activated carbon layer, 41-micro-filtration layer, 42-waterproof ultraviolet germicidal lamp, 43-liquid outlet pipe and 44-vibration motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Example 1

Referring to fig. 1 to 6, a wastewater treatment device for construction engineering comprises a first treatment tank 1, a feed hopper 2 is arranged on the first treatment tank 1, a movable hopper 3 is movably connected below the feed hopper 2, a first stirring shaft 4 and a stirring turning plate 5 which are convenient for stirring are arranged in the movable hopper 3, a linear reciprocating driving component is arranged outside the movable hopper 3, the linear reciprocating driving component comprises a second connecting rod 13, a roller 14, a cam 15, a first connecting rod 9, a moving block 10 and a spring 12, the moving block 10 is slidably connected on a sliding rod 11, a first gear 6 and a first rack 7 which are connected by gears are arranged at two ends of the first stirring shaft 4, a crushing component is arranged below the movable hopper 3, the crushing component comprises a first crushing roller 17 and a second crushing roller 20, the first crushing roller 17 and the second crushing roller 20 are rotatably connected by a second gear 18 and a third gear 19, a material conveying component is arranged below the crushing component and comprises a material conveying shaft 22 and flood dragon blades 23, a sieve plate 25 convenient for vibration sieving and a vibration motor 44 are arranged below the flood dragon blades 23, one end of the sieve plate 25 at the upper oblique side is communicated with a first collecting box 26 through a pipeline, a first stirring component is arranged in the first collecting box 26, the first stirring component comprises a second stirring shaft 28 and a third motor 27, a plurality of stirring blades are arranged on the second stirring shaft 28, the second stirring shaft 28 is fixedly connected with a magnet bar 29 which is convenient for adsorbing scrap iron, the second stirring shaft 28 is rotationally connected with a rotating shaft of the first crushing roller 17 through a synchronous belt 21, a sand cleaning component is arranged below the sieve plate 25, the sand cleaning component comprises a first air cylinder 32, a brush 31 and a sand filtering layer 30, one end of the inclined lower part of the sand filtering layer 30 is communicated with a second collecting box 34 which is convenient for storage through a pipeline.

Further, the stirring turning plate 5 is fixedly connected to the first stirring shaft 4, the two ends of the first stirring shaft 4 are fixedly connected with the first gear 6, the first gear 6 is in gear connection with the first rack 7, one side of the movable hopper 3 is fixedly connected with the second connecting rod 13, the second connecting rod 13 is connected to the inside of the first processing box 1 in a sliding mode, one end of the second connecting rod 13 is rotatably connected with the roller 14, the roller 14 is in contact with the cam 15, and the cam 15 is fixedly connected with an output shaft of the first motor 16.

Further, the other side of the movable hopper 3 is hinged with one end of a first connecting rod 9 through a connecting plate 8, the other end of the first connecting rod 9 is hinged on a movable block 10, one side of the movable block 10 is provided with a spring 12, and the sliding rod 11 is fixedly connected inside the first treatment box 1 through a mounting plate.

Further, flood dragon blade 23 fixed connection is on defeated material axle 22, defeated material axle 22 rotates to be connected in the inside of first processing case 1, the one end fixedly connected with second motor 24's of defeated material axle 22 output shaft, the below of sieve 25 is provided with the vibrating motor 44 of the vibration of being convenient for, second (mixing) shaft 28 fixedly connected with third motor 27's output shaft, the outside of first collecting box 26 is provided with the deslagging door.

Further, the brush 31 is fixedly connected with a piston rod of a first cylinder 32, and a valve is arranged on a pipeline which is communicated with a second collecting box 34 and obliquely below the sand filtering layer 30.

Preferably, waste water is placed into the first treatment box 1 through the feed hopper 2, the first motor 16 is started to drive the cam 15 to rotate, the moving block 10 on one side of the moving hopper 3 is driven to compress the spring 12 to move in a reciprocating manner under the eccentric action of the cam 15, and the first gears 6 at two ends of the first stirring shaft 4 are connected to the first rack 7 through gears while the moving hopper 3 moves, so that the stirring turning plate 5 in the moving hopper 3 is driven to rotate to stir the waste water from the feed hopper 2, and the waste water is uniformly scattered into the first crushing roller 17 and the second crushing roller 20 below.

Preferably, the third motor 27 is started to drive the second stirring shaft 28 to rotate, and under the driving action of the synchronous belt 21 and the gear connection relationship between the second gear 18 and the third gear 19, the first crushing roller 17 and the second crushing roller 20 are driven to rotate to crush solid waste and other substances in the wastewater.

Preferably, the vibrating motor 44 is started to drive the sieve plate 25 to perform vibrating sieving, the sieved sand and water are filtered and fall into the lower part, the second motor 24 is started to drive the dragon blades 23 on the material conveying shaft 22 to rotate, solid matters such as garbage are guided into the first collecting box 26, the stirring blades on the second stirring shaft 28 perform stirring, and the magnet rods 29 perform iron scrap adsorption.

Preferably, the first cylinder 32 is actuated to drive the brush 31 to perform a reciprocating sweep to push the sand into the second collection bin 34 for collection.

Example 2

Referring to fig. 1 to 6, the wastewater treatment device for the construction engineering comprises a first treatment tank 1 and a second collection tank 34, wherein the bottom of the first treatment tank 1 is communicated with a second treatment tank 35 through a pipeline and a water pump 33, a second stirring component is arranged in the second treatment tank 35, the second stirring component comprises a second cylinder 39, a third stirring shaft 38, a second rack 36 and a fourth gear 37, a plurality of stirring blades are arranged on the third stirring shaft 38, and an activated carbon layer 40, a microfiltration membrane layer 41 and a waterproof ultraviolet germicidal lamp 42 which are convenient for adsorption and sterilization are arranged below the second stirring component.

Further, a liquid injection pipe convenient for adding disinfectant is arranged above the second treatment box 35, the third stirring shaft 38 is rotatably connected to a piston rod of the second cylinder 39 through a bearing, two ends of the third stirring shaft 38 are fixedly connected with fourth gears 37 respectively, and the fourth gears 37 are meshed with the second rack 36.

Further, a liquid outlet pipe 43 is fixedly communicated with one end of the bottom of the second treatment box 35, and a valve is arranged on the liquid outlet pipe 43.

Preferably, the water pump 33 is started, the wastewater at the bottom of the first treatment tank 1 is extracted through the pipeline, the disinfectant is injected into the liquid injection pipe on the second treatment tank 35, the second air cylinder 39 is started, and the fourth gears 37 at the two ends of the third stirring shaft 38 are in gear connection with the second rack 36, so that the wastewater coming down through the forward and reverse rotation of the stirring blades on the third stirring shaft 38 is stirred and is sufficiently mixed with the disinfectant.

Preferably, the activated carbon layer 40 and the microfiltration membrane layer 41 are subjected to adsorption sterilization, and the waterproof ultraviolet germicidal lamp 42 is subjected to ultraviolet sterilization and disinfection, so that healthy water is discharged from the liquid outlet pipe 43.

The rest of the structure of this example is the same as example 1.

The working principle of the invention is as follows: waste water is put into a first treatment box 1 through a feed hopper 2, a first motor 16 is started, a driving cam 15 rotates, a moving block 10 on one side of a movable hopper 3 is driven to compress a spring 12 to move in a reciprocating manner under the eccentric action of the cam 15, a first gear 6 at two ends of a first stirring shaft 4 is connected to a first rack 7 through gears while the movable hopper 3 moves, so that a stirring turning plate 5 in the movable hopper 3 is driven to rotate to stir the waste water discharged from the feed hopper 2, the waste water is uniformly scattered onto a first crushing roller 17 and a second crushing roller 20 below, a third motor 27 is started to drive a second stirring shaft 28 to rotate, and under the driving action of a synchronous belt 21 and the gear connection relationship between the second gear 18 and a third gear 19, the first crushing roller 17 and the second crushing roller 20 are driven to rotate to crush solid garbage and other substances in the waste water, the vibrating motor 44 is started to drive the sieve plate 25 to perform vibrating screening, the screened sand and water are filtered and fall below, the second motor 24 is started to drive the auger blades 23 on the conveying shaft 22 to rotate, solid matters such as garbage and the like are guided into the first collecting box 26, the stirring blades on the second stirring shaft 28 are stirred, the magnet rods 29 are used for adsorbing iron filings, the first air cylinder 32 is started to drive the brush 31 to perform reciprocating cleaning, sand and stones are pushed into the second collecting box 34 to be collected, the water pump 33 is started to pump the wastewater at the bottom of the first processing box 1 through a pipeline, the liquid injection pipe on the second processing box 35 is filled with disinfectant, the second air cylinder 39 is started to drive the fourth gears 37 at the two ends of the third stirring shaft 38 to be connected to the second rack 36, so that the stirring blades on the third stirring shaft 38 are driven to rotate positively and negatively to stir the wastewater, and the wastewater is fully mixed with the disinfectant, the activated carbon layer 40 and the microfiltration membrane layer 41 perform adsorption sterilization, and the waterproof ultraviolet germicidal lamp 42 performs ultraviolet sterilization disinfection, so that healthy water is discharged from the liquid outlet pipe 43.

It should be noted that, in the present application, all the components are common standard components or components known to those skilled in the art, and the design of the movable hopper 3, the linear reciprocating driving component, the crushing component, the material conveying component, the sieve plate 25, the vibration motor 44, the first stirring component, the magnet rod 29, the sand cleaning component, the second stirring component, the activated carbon layer 40, the microfiltration membrane layer 41 and the waterproof ultraviolet germicidal lamp 42 is applied to a wastewater treatment device for construction engineering in combination, which is an innovative point of the present application, and effectively solves the problem of poor treatment effect of the existing wastewater treatment device for construction engineering.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A wastewater treatment device for constructional engineering comprises a first treatment box (1), wherein a feed hopper (2) is arranged on the first treatment box (1), and is characterized in that a movable hopper (3) is movably connected below the feed hopper (2), a first stirring shaft (4) and a stirring turning plate (5) which are convenient for stirring are arranged in the movable hopper (3), a linear reciprocating driving assembly is arranged on the outer side of the movable hopper (3), the linear reciprocating driving assembly comprises a second connecting rod (13), a roller (14), a cam (15), a first connecting rod (9), a moving block (10) and a spring (12), the moving block (10) is slidably connected on a sliding rod (11), a first gear (6) and a first rack (7) which are connected through gears are arranged at two ends of the first stirring shaft (4), and a crushing assembly is arranged below the movable hopper (3), the crushing component comprises a first crushing roller (17) and a second crushing roller (20), the first crushing roller (17) and the second crushing roller (20) are rotatably connected through a second gear (18) and a third gear (19), a material conveying component is arranged below the crushing component, the material conveying component comprises a material conveying shaft (22) and a flood dragon blade (23), a sieve plate (25) and a vibrating motor (44) which are convenient for vibrating and screening are arranged below the flood dragon blade (23), one end of the oblique upper part of the sieve plate (25) is communicated with a first collecting box (26) through a pipeline, a first stirring component is arranged in the first collecting box (26), the first stirring component comprises a second stirring shaft (28) and a third motor (27), a plurality of stirring blades are arranged on the second stirring shaft (28), and a magnet rod (29) which is convenient for adsorbing scrap iron is fixedly connected to the second stirring shaft (28), second (mixing) shaft (28) are rotated the pivot that is connected with first crushing roller (17) through hold-in range (21), the below of sieve (25) is provided with the sand removal subassembly, the sand removal subassembly includes first cylinder (32), brush (31) and grit filter layer (30), the oblique below one end of grit filter layer (30) has second collecting box (34) of being convenient for to accomodate through the pipeline intercommunication, the bottom of first processing case (1) has second processing case (35) through pipeline and water pump (33) intercommunication, be provided with second stirring subassembly in second processing case (35), second stirring subassembly includes second cylinder (39), third (mixing) shaft (38), second rack (36) and fourth gear (37), be provided with a plurality of stirring leaves on third (mixing) shaft (38), the below of second stirring subassembly is provided with activated carbon layer (40) of being convenient for adsorption and sterilization, A micro-filter film layer (41) and a waterproof ultraviolet germicidal lamp (42).

2. The wastewater treatment device for the construction engineering as claimed in claim 1, wherein the stirring turning plate (5) is fixedly connected to a first stirring shaft (4), two ends of the first stirring shaft (4) are fixedly connected with first gears (6), the first gears (6) are in gear connection with a first rack (7), one side of the movable hopper (3) is fixedly connected with a second connecting rod (13), the second connecting rod (13) is in sliding connection with the inside of the first treatment box (1), one end of the second connecting rod (13) is rotatably connected with a roller (14), the roller (14) is in contact with a cam (15), and the cam (15) is fixedly connected with an output shaft of a first motor (16).

3. The wastewater treatment device for the construction engineering as claimed in claim 2, wherein the other side of the movable bucket (3) is hinged with one end of a first connecting rod (9) through a connecting plate (8), the other end of the first connecting rod (9) is hinged on a movable block (10) respectively, one side of the movable block (10) is provided with a spring (12) respectively, and the sliding rod (11) is fixedly connected inside the first treatment box (1) through a mounting plate.

4. The wastewater treatment device for the building engineering according to claim 3, characterized in that flood dragon blade (23) fixed connection is on defeated material axle (22), defeated material axle (22) rotate to be connected in the inside of first processing case (1), the output shaft of the one end fixedly connected with second motor (24) of defeated material axle (22), the below of sieve (25) is provided with vibrating motor (44) of being convenient for the vibration, the output shaft of second (28) fixedly connected with third motor (27), the outside of first collecting box (26) is provided with the scum door.

5. The wastewater treatment device for construction engineering according to claim 4, wherein the brush (31) is fixedly connected with a piston rod of a first cylinder (32), and a valve is arranged on a pipeline which is communicated with a second collection tank (34) and is obliquely arranged below the sand filter layer (30).

6. The wastewater treatment device for the construction engineering as claimed in claim 1, wherein a liquid injection pipe for facilitating the addition of disinfectant is arranged above the second treatment tank (35), the third stirring shaft (38) is rotatably connected to a piston rod of a second cylinder (39) through a bearing, both ends of the third stirring shaft (38) are respectively and fixedly connected with a fourth gear (37), and the fourth gear (37) is meshed with the second rack (36).

7. The wastewater treatment device for construction engineering as claimed in claim 6, wherein one end of the bottom of the second treatment tank (35) is fixedly communicated with a liquid outlet pipe (43), and a valve is arranged on the liquid outlet pipe (43).