CN219502038U

CN219502038U - Central transmission mud scraper for sewage treatment

Info

Publication number: CN219502038U
Application number: CN202320079318.8U
Authority: CN
Inventors: 黄震宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-08-11
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses a central transmission mud scraper for sewage treatment, which is characterized in that a spring is arranged to push a first sliding block downwards, so that the first sliding block downwards presses a plurality of groups of supporting rods through a plurality of groups of spring telescopic columns respectively, the plurality of groups of first scraping plates strengthen the adhesion strength with the bottom surface of a cavity, the effect of scraping mud at the bottom end inside the cavity is improved, the cleaning efficiency of mud is improved, the upward and downward moving position of a second sliding block is adjusted by rotating a plurality of groups of studs, the pressing strength of the first sliding block on the plurality of groups of supporting rods is adjusted, the adjustment convenience of the device on the scraping strength of mud is improved, and the operation flexibility of the device is improved; including water pitcher, first mud pipe, mounting bracket, support, driving motor, multiunit bracing piece, first slider, multiunit spring telescopic column, second slider, spring, external member, multiunit double-screw bolt and drain pipe, be provided with the cavity in the water pitcher to the bottom of cavity sets up to the inclined plane.

Description

Central transmission mud scraper for sewage treatment

Technical Field

The utility model relates to the field of sewage treatment, in particular to a central transmission mud scraper for sewage treatment.

Background

A center drive sludge scraper for sewage treatment is an auxiliary device for sewage treatment, which is widely used in the field of sewage treatment; in the use of the existing central transmission mud scraper, the sewage treatment is found to be a process of purifying the sewage which is discharged into a certain water body or reused, the sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy, petrochemical industry, environmental protection, urban landscapes, medical treatment, catering and the like, the sewage treatment is generally divided into production sewage treatment and domestic sewage treatment, the production sewage comprises industrial sewage, agricultural sewage, medical sewage and the like, the domestic sewage is sewage produced in daily life, namely complex mixtures of inorganic matters and organic matters in various forms,

at present, when a central transmission sludge scraping device for sewage treatment scrapes sludge in a sedimentation tank, the sludge scraping effect of the device on the bottom of the sedimentation tank is poor, and the scraping force adjustment convenience of the device on the sludge is poor, so that the sludge scraping efficiency of the device is low, and the practicability of the device is poor.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a central transmission mud scraper for sewage treatment, which is characterized in that a spring is arranged to push a first sliding block downwards, so that the first sliding block downwards presses a plurality of groups of supporting rods through a plurality of groups of spring telescopic columns, the plurality of groups of first scraping plates strengthen the adhesion strength with the bottom surface of a cavity, the sludge scraping effect at the bottom end inside the cavity is improved, the sludge cleaning efficiency is improved, the elastic force of the spring is adjusted by rotating a plurality of groups of studs to enable a second sliding block to move up and down, the pressing strength of the first sliding block on the plurality of groups of supporting rods is adjusted, the convenience of the device for adjusting the scraping strength of the sludge is improved, the operation flexibility of the device is improved, and the practicability of the device is improved.

In order to achieve the aim, the utility model designs a central transmission mud scraper for sewage treatment, which comprises a water tank, a first mud pipe, a mounting frame, a bracket, a driving motor, a plurality of groups of first supporting rods, a first sliding block, a plurality of groups of spring telescopic columns, a second sliding block, springs, a sleeve, a plurality of groups of studs and a drain pipe, wherein a cavity is arranged in the water tank, the bottom end of the cavity is provided with an inclined plane, a water inlet, an opening and a drain outlet are arranged in the cavity, the water inlet, the opening and the drain outlet are all communicated with the cavity, the top end of the first mud pipe is connected with the bottom end of the water tank and communicated with the drain outlet of the cavity, the bottom end of the mounting frame is connected with the top end of the water tank and is arranged at the opening of the cavity, the bracket is arranged on the inner side wall of the first mud pipe, the driving motor is arranged at the top end of the mounting frame, the output end of the bottom end of the driving motor is longitudinally provided with a rotating shaft, and the bottom end of the rotating shaft is rotatably connected with the top end of the bracket, the right ends of the plurality of groups of first supporting rods are respectively and rotatably connected with the outer side wall of the rotating shaft, the bottom ends of the plurality of groups of first supporting rods are respectively provided with a plurality of groups of first scraping plates, the plurality of groups of first scraping plates are respectively arranged in the cavity, the bottom ends of the plurality of groups of first scraping plates are respectively and tightly attached to the bottom ends of the inner side walls of the cavity, the first sliding blocks can be vertically and slidably sleeved on the outer side wall of the rotating shaft, the bottom ends of the plurality of groups of spring telescopic columns are respectively and rotatably connected with the outer side wall of the first sliding blocks, the top ends of the plurality of groups of spring telescopic columns are respectively and rotatably connected with the top ends of the plurality of groups of first supporting rods, the second sliding blocks can be vertically and slidably sleeved on the outer side wall of the rotating shaft, the springs are matched and arranged on the outer side wall of the rotating shaft and between the first sliding blocks and the second sliding blocks, the sleeve is fixedly sleeved on the outer side wall of the rotating shaft, the upper parts of the plurality of groups of studs are respectively and rotatably arranged inside the sleeve, the lower parts of the plurality of groups of studs are respectively provided with threads, the lower parts of the plurality of groups of studs are respectively and rotatably arranged in the second sliding block, and the drain pipe is arranged on the outer side wall of the water tank and communicated with the cavity.

Further, still include mud case, second mud pipe, flange, the puddler, helical blade and second scraper blade, but mud case top and the bottom of first mud pipe are connected, be provided with the cavity in the mud case, be provided with water inlet and outlet in the cavity, water inlet and outlet all communicate with each other in the cavity, and cavity water inlet and first mud pipe intercommunication, the second mud pipe is installed on the lateral wall of mud case, and the input and the cavity outlet intercommunication of second mud pipe, flange intercommunication sets up on the output of second mud pipe, the puddler vertically sets up in the cavity inside, but puddler bottom and the inside wall swivelling joint of mud case, but the top swivelling set up in the support inside and be connected with the bottom of pivot, helical blade installs on the lateral wall of puddler and sets up in the cavity, multiunit second scraper blade is installed respectively on the lateral wall of puddler, and multiunit second scraper blade's epitaxy is closely with the inside wall of cavity respectively.

Still further, the second bracing piece, the third scraper blade, baffle and material case, the second bracing piece is installed on the lateral wall of pivot, the third scraper blade is installed in the bottom of second bracing piece and flushes with the liquid level highest point of sewage, be provided with the sediment mouth on the lateral wall of water pitcher, the sediment mouth communicates with each other with the cavity in, the baffle is installed on the inside wall of cavity and communicates with the sediment mouth, the material case is installed on the lateral wall of water pitcher, be provided with the cavity in the material case, the cavity top is provided with the opening, the cavity bottom is provided with the discharge port, opening and discharge port all communicate with the cavity in to cavity opening and sediment mouth intercommunication.

Still further still include the dredge pump, dredge pump input communicates with the output of second row mud pipe through flange.

Still further still, still include multiunit sterilamp, multiunit sterilamp installs in the bottom of mounting bracket respectively.

Still further still, still include multiunit light, multiunit light is installed in the bottom of mounting bracket respectively.

Still further, still include the measuring apparatu, the measuring apparatu is installed on the lateral wall of water pitcher and communicates with the cavity.

The utility model has the beneficial effects that:

according to the utility model, sewage to be treated is discharged into the chamber through the water inlet of the chamber, the sludge deposited in the chamber falls to the bottom end of the chamber, the driving motor is opened to drive the rotating shaft to rotate, the rotating shaft drives the plurality of groups of first scrapers to scrape the sludge at the bottom end of the chamber through the plurality of groups of support rods, the scraped sludge falls to the sewage outlet of the chamber through the inclined plane at the bottom end of the chamber and is discharged through the first sludge discharge pipe, the sewage in the chamber is discharged through the water discharge pipe, the first slide block is pushed downwards through the set spring, the first slide block is respectively pushed downwards through the plurality of groups of spring telescopic columns, so that the plurality of groups of first scrapers strengthen the adhesion strength with the bottom surface of the chamber, the scraping effect of the sludge at the bottom end of the chamber is improved, the cleaning efficiency of the sludge is improved, the elastic force of the second slide block is adjusted through rotating the plurality of groups of studs to move up and down, the pressing strength of the first slide block on the plurality of groups of support rods is adjusted, the convenience in adjusting the scraping strength of the sludge of the device is improved, the operation flexibility of the device is improved, and the practicability of the device is improved.

Drawings

FIG. 1 is a schematic diagram of a center drive sludge scraper for sewage treatment;

FIG. 2 is an enlarged schematic view of the connection of the first slider to the spring telescoping post or the like;

FIG. 3 is an enlarged schematic view of the connection of the stirring rod to the helical blade or the like;

FIG. 4 is an enlarged schematic view of the connection of the support bar to the third screed, etc.;

in the figure: 1-a water tank; 2-a first sludge discharge pipe; 3-mounting rack; 4-a bracket; 5-driving a motor; 6-rotating shaft; 7-a first support bar; 8-a first scraper; 9-a first slider; 10-a spring telescoping post; 11-a second slider; 12-a spring; 13-kit; 14-stud; 15-a drain pipe; 16-a sludge tank; 17-a second sludge discharge pipe; 18-connecting flanges; 19-stirring rod; 20-helical blades; 21-a second squeegee; 22-a second support bar; 23-a third scraper; 24-baffle; 25-a material box; 26-a mud pump; 27-sterilizing lamps; 28-lighting lamp; 29-measuring instrument.

Detailed Description

The present utility model is described in further detail below in conjunction with specific embodiments for understanding by those skilled in the art.

The central transmission mud scraper for sewage treatment shown in figures 1-4 comprises a water tank 1, a first mud pipe 2, a mounting frame 3, a bracket 4, a driving motor 5, a plurality of groups of supporting rods 7, a first sliding block 9, a plurality of groups of spring telescopic columns 10, a second sliding block 11, springs 12, a sleeve 13, a plurality of groups of studs 14 and a drain pipe 15, wherein a cavity is arranged in the water tank 1, the bottom end of the cavity is provided with an inclined plane, a water inlet, an opening and a drain outlet are arranged in the cavity, the water inlet, the opening and the drain outlet are all communicated with the cavity, the top end of the first mud pipe 2 is connected with the bottom end of the water tank 1 and communicated with the drain outlet of the cavity, the bottom end of the mounting frame 3 is connected with the top end of the water tank 1 and is arranged at the opening of the cavity, the bracket 4 is arranged on the inner side wall of the first mud pipe 2, the driving motor 5 is arranged at the top end of the mounting frame 3, and the output end of the bottom end of the driving motor 5 is longitudinally provided with a rotating shaft 6, the bottom end of the rotating shaft 6 is rotatably connected with the top end of the support 4, the right ends of the plurality of groups of support rods 7 are respectively rotatably connected with the outer side wall of the rotating shaft 6, the bottom ends of the plurality of groups of support rods 7 are respectively provided with a plurality of groups of first scraping plates 8, the plurality of groups of first scraping plates 8 are respectively arranged in the cavity, the bottom ends of the plurality of groups of first scraping plates 8 are respectively tightly adhered to the bottom ends of the inner side walls of the cavity, the first sliding blocks 9 can be vertically and slidably sleeved on the outer side wall of the rotating shaft 6, the bottom ends of the plurality of groups of spring telescopic columns 10 are respectively rotatably connected with the outer side wall of the first sliding blocks 9, the top ends of the plurality of groups of spring telescopic columns 10 are respectively rotatably connected with the top ends of the plurality of groups of support rods 7, the second sliding blocks 11 can be vertically and slidably sleeved on the outer side wall of the rotating shaft 6, the springs 12 are matched and are arranged on the outer side wall of the rotating shaft 6 and between the first sliding blocks 9 and the second sliding blocks 11, and the sleeve 13 is fixedly sleeved on the outer side wall of the rotating shaft 6, the upper parts of the plurality of groups of studs 14 are respectively rotatably arranged in the sleeve 13, the lower parts of the plurality of groups of studs 14 are respectively provided with threads, the lower parts of the plurality of groups of studs 14 are respectively rotatably arranged in the second slide block 11, and the drain pipe 15 is arranged on the outer side wall of the water tank 1 and communicated with the cavity; firstly, sewage to be treated is discharged to the inside of a cavity through a cavity water inlet, the sewage is precipitated in the cavity and then falls to the bottom end of the cavity, a driving motor 5 is opened to drive a rotating shaft 6 to rotate, the rotating shaft 6 drives a plurality of groups of first scraping plates 8 to scrape the sludge at the bottom end of the cavity through a plurality of groups of supporting rods 7, the scraped sludge falls to a sewage outlet of the cavity through an inclined plane at the bottom end of the cavity and is discharged through a first sludge discharge pipe 2, the sewage in the cavity is discharged through a water discharge pipe 15, the first sliding blocks 9 are pushed downwards through a spring 12, the first sliding blocks 9 are respectively pressed downwards through a plurality of groups of spring telescopic columns 10, so that the plurality of groups of first scraping plates 8 strengthen the tight adhesion force with the bottom surface of the cavity, the effect of scraping the sludge at the bottom end of the cavity is improved, the cleaning efficiency of the sludge is improved, the upward and downward movement position of a second sliding block 11 is adjusted through rotating a plurality of groups of studs 14, so that the pressing strength of the first sliding blocks 9 to the plurality of groups of supporting rods 7 is adjusted, the scraping force of the sludge is improved, the operation flexibility of the device is improved, and the practicability of the device is improved.

The top end of the sludge box 16 is connected with the bottom end of the first sludge discharge pipe 2, a cavity is arranged in the sludge box 16, a water inlet and a water outlet are arranged in the cavity, the water inlet and the water outlet are communicated with the cavity, the cavity water inlet is communicated with the first sludge discharge pipe 2, a second sludge discharge pipe 17 is arranged on the outer side wall of the sludge box 16, the input end of the second sludge discharge pipe 17 is communicated with the cavity water outlet, a connecting flange 18 is arranged on the output end of the second sludge discharge pipe 17 in a communicated manner, a stirring rod 19 is longitudinally arranged in the cavity, the bottom end of the stirring rod 19 is rotatably connected with the inner side wall of the sludge box 16, the top end of the stirring rod 19 is rotatably arranged in the bracket 4 and is connected with the bottom end of the rotating shaft 6, a plurality of sets of second scraping plates 21 are respectively arranged on the outer side wall of the stirring rod 19, and the extension of the plurality of sets of second scraping plates 21 are respectively attached to the inner side wall of the cavity; the mud is discharged to the cavity inside through first mud pipe 2, drive puddler 19 simultaneously in the rotatory in-process of pivot 6, thereby make puddler 19 stir the mud in the cavity, prevent that the mud deposit is difficult to discharge, inside the mud after stirring was discharged the cavity through second mud pipe 17, drive helical blade 20 and rotate in the time of puddler 19 is rotatory, thereby make helical blade 20 carry the inside mud of first mud pipe 2 to the cavity in, prevent that mud from blocking up first mud pipe 2, improve the conveying speed of mud in first mud pipe 2, improve the collection efficiency of the interior mud of cavity, clear up the cavity inner wall through setting up multiunit second scraper blade 21, reduce the mud deposit in the cavity, improve the clean effect of mud emission, the practicality of device is improved.

The second support rod 22 is arranged on the outer side wall of the rotating shaft 6, the third scraping plate 23 is arranged at the bottom end of the second support rod 22 and is flush with the highest point of the liquid level of sewage, a slag discharging port is arranged on the outer side wall of the water tank 1, the slag discharging port is communicated with the inside of the chamber, the baffle 24 is arranged on the inner side wall of the chamber and is communicated with the slag discharging port, the material box 25 is arranged on the outer side wall of the water tank 1, a cavity is arranged in the material box 25, the top end of the cavity is provided with an opening, the bottom end of the cavity is provided with a discharge port, the opening and the discharge port are communicated with the cavity, and the cavity opening is communicated with the slag discharging port; the rotatory in-process of pivot 6 drives second bracing piece 22 rotation simultaneously, and second bracing piece 22 is rotatory to strike off the floater on sewage liquid level top through third scraper blade 23, and the dross after striking off gets into baffle 24 inside, discharges to material case 25 inside through the cavity slag notch, through setting up third scraper blade 23, improves the convenience of sewage dross clearance, improves the purifying effect of sewage, improves the device practicality.

The input end of the mud pump 26 is communicated with the output end of the second mud pipe 17 through a connecting flange 18; by providing the sludge pump 26, the efficiency of sludge discharge in the cavity is improved, and the convenience of sludge discharge is improved.

A plurality of groups of disinfection lamps 27 are respectively arranged at the bottom end of the installation frame 3; by arranging a plurality of groups of disinfection lamps 27, the disinfection effect of sewage is improved, the propagation of sewage plankton is reduced, and the purification effect of sewage is improved.

A plurality of groups of illuminating lamps 28 are respectively arranged at the bottom end of the mounting frame 3; by providing a plurality of groups of illumination lamps 28, the illumination effect inside the device is improved, and the convenience of illumination is improved.

The measuring instrument 29 is arranged on the outer side wall of the water tank 1 and communicated with the chamber; by arranging the measuring instrument 29, the convenience of the sewage water quality detection in the chamber is improved.

The working process of the central transmission mud scraper for sewage treatment comprises the following steps:

during operation, sewage to be treated is firstly discharged to the inside of the cavity through the cavity water inlet, the sewage is deposited in the cavity and then falls to the bottom end of the cavity, the driving motor 5 is opened to drive the rotating shaft 6 to rotate, the rotating shaft 6 drives the plurality of groups of first scraping plates 8 to scrape the sludge at the bottom end of the cavity through the plurality of groups of supporting rods 7, the scraped sludge falls to the sewage outlet of the cavity through the inclined plane at the bottom end of the cavity and is discharged through the first sludge discharging pipe 2, sewage in the cavity is discharged through the water discharging pipe 15, then the sludge is discharged to the inside of the cavity through the first sludge discharging pipe 2, the stirring rod 19 is simultaneously driven to rotate in the rotating process of the rotating shaft 6, so that the stirring rod 19 stirs the sludge in the cavity, the stirring rod 19 is rotated and simultaneously drives the spiral blades 20 to rotate, so that the spiral blades 20 convey the sludge in the inside of the first sludge discharging pipe 2 to the cavity, the sludge is cleaned up through the plurality of groups of second scraping plates 21, the sludge is reduced in the cavity inner wall, then the second supporting rods 22 are simultaneously driven to rotate in the rotating process of the rotating shaft 6, the second supporting rods 22 rotates the sewage to scrape the top end of the sludge through the third scraping plates 23, the sludge in the cavity is discharged into the inside of the cavity through the floating material through the third scraping plates 23, and the floating materials in the cavity, and the floating materials in the cavity are discharged through the floating materials in the cavity, and the floating materials in the cavity, and the floating materials in the inside the floating materials, and the inside the floating materials in the cavity.

The installation mode, the connection mode or the setting mode of the central transmission mud scraper for sewage treatment are all common mechanical modes, and can be implemented as long as the beneficial effects of the central transmission mud scraper can be achieved; the driving motor 5, the mud pump 26, the sterilizing lamp 27, the illuminating lamp 28 and the measuring instrument 29 of the central transmission mud scraper for sewage treatment are purchased in the market, and the man skilled in the art only needs to install and operate according to the attached using instruction.

Other parts not described in detail are prior art. Although the foregoing embodiments have been described in some, but not all, embodiments of the utility model, it should be understood that other embodiments may be devised in accordance with the present embodiments without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a central transmission mud scraper for sewage treatment, its characterized in that includes water pitcher (1), first row mud pipe (2), mounting bracket (3), support (4), driving motor (5), multiunit first bracing piece (7), first slider (9), multiunit spring telescopic column (10), second slider (11), spring (12), external member (13), multiunit double-screw bolt (14) and drain pipe (15), be provided with the cavity in water pitcher (1) to the bottom of cavity sets up to the inclined plane, is provided with water inlet, opening and drain in the cavity respectively, water inlet, opening and drain all are with the cavity in-phase, first row mud pipe (2) top is connected and is linked together with the cavity drain in the bottom of water pitcher (1), the top of mounting bracket (3) and the top of water pitcher (1) are connected and are set up in the cavity opening part, support (4) are installed on the inside wall of first row mud pipe (2), the top of mounting bracket (3) is installed in driving motor (5), driving motor (5) bottom output is provided with vertically to be provided with inclined plane, and bottom and the bottom of support bracket (6) and a multiunit pivot (6) are rotatable in the side wall (6) respectively with the side wall of a plurality of rotatory support bar (7), the bottom of multiunit first bracing piece (7) is provided with multiunit first scraper blade (8) respectively, multiunit first scraper blade (8) set up respectively in the cavity, and multiunit first scraper blade (8) the bottom paste tightly with the bottom of the inside wall of cavity respectively, first slider (9) slide jacket about on the lateral wall of pivot (6), multiunit spring telescopic column (10) one end respectively with the lateral wall swivelling joint of first slider (9), multiunit spring telescopic column (10) the other end respectively with multiunit first bracing piece (7) the top swivelling joint, second slider (11) slide jacket about on the lateral wall of pivot (6) about, spring (12) cooperation is installed on the lateral wall of pivot (6) and is set up between first slider (9) and second slider (11), the fixed suit of external wall on pivot (6), multiunit double-screw bolt (14) top in the inside of respectively swivelling mount is installed in 13 respectively, multiunit double-screw bolt (14) lower part is provided with the screw thread respectively, and multiunit (14) the lower part is rotatable in the external water tank (1) and the external wall of the external water tank (11) is installed at the inside of multiunit (1).

2. The center drive sludge scraper for sewage treatment according to claim 1, further comprising a sludge tank (16), a second sludge discharge pipe (17), a connecting flange (18), a stirring rod (19), a helical blade (20) and a second scraper (21), wherein the top end of the sludge tank (16) is connected with the bottom end of the first sludge discharge pipe (2), a cavity is arranged in the sludge tank (16), a water inlet and a water outlet are arranged in the cavity, the water inlet and the water outlet are communicated with the cavity, the cavity water inlet is communicated with the first sludge discharge pipe (2), the second sludge discharge pipe (17) is arranged on the outer side wall of the sludge tank (16), the input end of the second sludge discharge pipe (17) is communicated with the cavity water outlet, the connecting flange (18) is arranged on the output end of the second sludge discharge pipe (17), the stirring rod (19) is longitudinally arranged in the cavity, the bottom end of the stirring rod (19) is rotatably connected with the inner side wall of the sludge tank (16), the top end of the stirring rod (19) is rotatably arranged in the bracket (4) and is connected with the helical blade (6) on the outer side wall (21) of the second sludge discharge pipe (19), a plurality of groups of stirring blades (19) are respectively arranged on the outer side wall (19), and the extension of the plurality of groups of second scrapers (21) is respectively tightly attached to the inner side wall of the cavity.

3. The central transmission mud scraper for sewage treatment according to claim 2, wherein the second supporting rod (22), the third scraping plate (23), the baffle (24) and the material box (25), the second supporting rod (22) is installed on the outer side wall of the rotating shaft (6), the third scraping plate (23) is installed at the bottom end of the second supporting rod (22) and is flush with the highest point of the liquid level of sewage, the slag discharging port is arranged on the outer side wall of the water tank (1), the slag discharging port is communicated with the inner side of the cavity, the baffle (24) is installed on the inner side wall of the cavity and is communicated with the slag discharging port, the material box (25) is installed on the outer side wall of the water tank (1), a cavity is arranged in the material box (25), an opening is arranged at the top end of the cavity, the opening is communicated with the cavity, and the opening and the slag discharging port are communicated with the slag discharging port.

4. A centre drive sludge scraper for sewage treatment according to claim 3, further comprising a sludge pump (26), the input of the sludge pump (26) being in communication with the output of the second sludge discharge pipe (17) via a connecting flange (18).

5. The center drive sludge scraper for sewage treatment according to claim 4, further comprising a plurality of groups of disinfection lamps (27), wherein the plurality of groups of disinfection lamps (27) are respectively installed at the bottom end of the installation frame (3).

6. The center drive sludge scraper for sewage treatment according to claim 5, further comprising a plurality of groups of illuminating lamps (28), wherein the plurality of groups of illuminating lamps (28) are respectively arranged at the bottom end of the mounting frame (3).

7. The center drive sludge scraper for sewage treatment as claimed in claim 6, further comprising a measuring instrument (29), wherein the measuring instrument (29) is installed on the outer side wall of the water tank (1) and communicates with the chamber.