CN112591819B

CN112591819B - Livestock-raising mixed sewage treatment integrated system

Info

Publication number: CN112591819B
Application number: CN202011494915.4A
Authority: CN
Inventors: 戴祝青; 邹佳骊; 陈为
Original assignee: Great Yangtze River Environmental Engineering Technology Co ltd
Current assignee: Great Yangtze River Environmental Engineering Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-11-04
Anticipated expiration: 2040-12-17
Also published as: CN112591819A

Abstract

The invention discloses a livestock breeding mixed sewage treatment integrated system which comprises a frame body, wherein a control center and a monitoring module are arranged in the frame body, an electric telescopic rod and an infrared sensor are arranged in the frame body, a scanning probe is rotatably connected in the frame body through the electric telescopic rod, a partition plate is arranged in the frame body, a treatment box is fixedly arranged in the frame body and positioned below the partition plate, the bottom of the partition plate is rotatably connected with a stirring rod, and one end, far away from the partition plate, of the stirring rod extends into the treatment box and is rotatably connected with the treatment box. According to the invention, the first discharge pipe and the second discharge pipe in the sewage treatment process can be touched by adding the touch mechanism in the treatment box in the sewage treatment process, so that the problem that the first discharge pipe and the second discharge pipe are easily blocked by livestock manure in sewage in the sewage treatment process can be effectively solved.

Description

Livestock-raising mixed sewage treatment integrated system

Technical Field

The invention relates to the technical field of livestock breeding, in particular to a livestock breeding mixed sewage treatment integrated system.

Background

The livestock breeding utilizes the physiological functions of animals such as livestock and poultry which are domesticated by human beings or wild animals such as deer, musk, fox, mink, otter, quail and the like, and converts pasture, feed and other plants into animal energy through artificial feeding and reproduction so as to obtain animal products such as meat, eggs, milk, wool, cashmere, skin, silk, medicinal materials and the like.

In the process of livestock breeding, the phenomenon that excrement and urine produced by livestock breeding and sewage are mixed can occur, the livestock breeding process is caused, the sewage is difficult to treat, when the mixed sewage produced by livestock breeding is treated, the phenomenon often occurs, the condition that the sewage treatment pipe is blocked by the excrement mixed in the sewage, the sewage backflow is caused, the phenomenon that an livestock breeding house is submerged by the sewage is caused, the livestock breeding industry is reduced, the living environment of livestock breeding is reduced, the output of livestock breeding is reduced, the long-time life is in the environment with the sewage, the health condition of the livestock breeding is seriously damaged, the development of the livestock breeding industry is not facilitated, and therefore, the livestock breeding mixed sewage treatment integrated system is provided.

Disclosure of Invention

The invention aims to solve the defect that excrement in mixed sewage easily blocks a sewage treatment pipe in the prior art, and provides an integrated system for treating the mixed sewage in livestock breeding.

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

the utility model provides a mixed sewage treatment integrated system of livestock-raising, includes the framework, the inside of framework contains control center and monitoring module, the internally mounted of framework has electric telescopic handle and infrared inductor, the inside of framework is rotated through electric telescopic handle and is connected with scanning probe, the inside of framework is equipped with the baffle, the inside of framework is located baffle below fixed mounting and is handled the case, the bottom of baffle is rotated and is connected with the puddler, the one end that the baffle was kept away from to the puddler extends to the inside of handling the case and is connected with handling the case rotation, the side fixedly connected with driving motor of framework, driving motor's output fixedly connected with head rod, the head rod passes through bevel gear and puddler rotation connection, the puddler is connected with the dwang through the bevel gear meshing, the dwang runs through the framework and is connected with the framework rotation, the bottom of handling the case has the ejector pad through reset spring sliding connection, the bottom fixedly connected with fixed block of ejector pad, fixedly connected with first discharging pipe on the baffle, first discharging pipe runs through the baffle and with handling case fixed connection, the bottom of handling the case is equipped with the second discharging pipe, the one end of handling the case runs through the side of pushing mechanism, the inside of handling the case is equipped with the mechanism.

Preferably, pushing mechanism includes and rotates the first roll roller of being connected with the framework side, the framework side rotates and is connected with the second roll roller, first roll roller is connected through the conveyer belt transmission with the second roll roller, fixed cover has connect the stay cord on the first roll roller, the bottom of handling the case is equipped with holds the chamber, the inside sliding connection that holds the chamber has the stopper, the stay cord is kept away from the one end of first roll roller and is passed through second roll roller and stopper fixed connection.

Preferably, the trigger mechanism includes a fixed frame fixedly connected with the frame body, the fixed frame is far away from a limit frame fixedly connected with one end of the frame body, a sliding plate is slidably connected inside the fixed frame, two second connecting rods are rotatably connected to the sliding plate, a contact rod is slidably connected in the fixed frame, one end of the second connecting rod, far away from the sliding plate, is rotatably connected with the corresponding contact rod, a sliding rod is fixedly connected with one end of the sliding plate, far away from the contact rod, is slidably connected with the limit frame, one of the contact rod penetrates through the inside of the first discharging pipe, and the other contact rod penetrates through the inside of the second discharging pipe.

Preferably, the first connecting rod penetrates through the frame body and is connected with the frame body in a rotating mode, the limiting block is in contact with the fixing block, the first connecting rod is fixedly sleeved with a first cylindrical gear, and the first cylindrical gear is meshed with the first rolling roller.

Preferably, the side face of the frame body is rotatably connected with a second cylindrical gear through a rotating shaft, the second cylindrical gear is rotatably connected with a third connecting rod through the rotating shaft, one end, far away from the second cylindrical gear, of the third connecting rod is rotatably connected with the sliding rod, and the second cylindrical gear is connected with a fourth connecting rod through meshing of the third cylindrical gear.

Preferably, the active carbon pole has been cup jointed in the rotation on the dwang, the side fixedly connected with collecting box of framework, a plurality of dwangs pass through gear engagement in the collecting box and connect, the dwang passes through gear engagement with the fourth connecting rod and is connected.

Preferably, the inside of the treatment box is provided with an air duct, and one end of the air duct, which is far away from the treatment box, extends to the inside of the collection box.

Preferably, signal connection between control center and the monitoring module, the inside of framework contains scanning module, adjusting module, control module, response module, processing module, signal connection between scanning module and the adjusting module, signal connection between adjusting module and the control module, signal connection between control module and the response module, signal connection between response module and the processing module.

Preferably, the scanning module includes scanning probe, the regulation module includes electric telescopic handle, control module includes driving motor, the response module includes infrared inductor, processing module includes the active carbon pole.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the first discharging pipe and the second discharging pipe in the sewage treatment process can be touched by adding the touch mechanism in the treatment box in the sewage treatment process, so that the problem that the first discharging pipe and the second discharging pipe are easily blocked by livestock excrement in sewage in the sewage treatment process can be effectively solved, the phenomenon of sewage backflow in the sewage treatment process can be avoided, the problem of environmental pollution in an livestock breeding house caused by sewage can be effectively avoided, meanwhile, when the livestock sewage treatment is carried out, the pushing block is utilized to push mixed sewage in the treatment box, the sewage treatment speed is effectively increased, meanwhile, the pushing block can be used for scraping the bottom of the treatment box, the phenomenon that the excrement in the mixed sewage remains in the treatment box is avoided, the cleaning of the inside of the treatment box is effectively improved, the phenomenon that the sediment in the treatment box is difficult to clean in the traditional sewage treatment process is solved, and the phenomenon that the sewage is in contact with the inside of the treatment box for a long time and the inner side wall of the treatment box is oxidized is further avoided, and the phenomenon that the second treatment pipe is blocked can be further avoided.

2. Stir mixing sewage through the puddler to can stir excrement and urine in the sewage, let the excrement and urine at utmost in mixing sewage dissolve in water, so that mix the flow of sewage, avoid mixing the poultry excrement and urine in the sewage and cause the condition of jam, accelerate the treatment rate of sewage, thereby can further promote the treatment effeciency of sewage.

3. Set up the active carbon pole in the side of sewage treatment case, utilize the active carbon pole can purify harmful gas and the smell that poultry excrement and urine produced in the mixed sewage, promote the environment of livestock-raising life to effectual promotion livestock-raising industry's industrial efficiency, whole in-process utilizes a driving motor to drive, has practiced thrift the resource, has certain economic efficiency.

4. Through the cooperation work between scanning module, adjusting module, control module, response module and the processing module, realize poultry and mix the sewage treatment system, this individual system can the effectual solution mix the sewage treatment in-process, can't carry out real-time processing's drawback to mixing sewage, simultaneously, can effectually avoid mixing the sewage treatment in-process, the condition of jam appears.

Drawings

FIG. 1 is a schematic structural diagram of a livestock breeding mixed wastewater treatment integrated system according to the present invention;

FIG. 2 is a left side view of the first and second wind-up rollers of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 1;

FIG. 4 is an enlarged view at B of FIG. 1;

FIG. 5 is a bottom plan view of the reciprocator of FIG. 4;

fig. 6 is a schematic block diagram of a livestock breeding mixed sewage treatment integrated system according to the present invention.

In the figure: the device comprises a frame body 1, a partition plate 2, a scanning probe 3, a driving motor 4, a first connecting rod 5, a stirring rod 6, a first cylindrical gear 7, a first rolling roller 8, a second rolling roller 9, a first discharging pipe 10, a second discharging pipe 11, a pushing block 12, a fixed block 13, a limited block 14, an activated carbon rod 15, a gas guide pipe 16, a processing box 17, a fixed frame 18, a touch rod 19, a second connecting rod 20, a sliding plate 21, a limited frame 22, a sliding rod 23, a third connecting rod 24, a second cylindrical gear 25, a fourth connecting rod 26 and a third cylindrical gear 27.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-6, a mixed sewage treatment integrated system for livestock breeding comprises a frame body 1, the inside of the frame body 1 comprises a control center and a monitoring module, an electric telescopic rod and an infrared sensor are installed inside the frame body 1, a scanning probe 3 is rotatably connected inside the frame body 1 through the electric telescopic rod, a partition plate 2 is arranged inside the frame body 1, a treatment box 17 is fixedly installed inside the frame body 1 below the partition plate 2, a stirring rod 6 is rotatably connected to the bottom of the partition plate 2, one end of the stirring rod 6, which is far away from the partition plate 2, extends into the treatment box 17 and is rotatably connected with the treatment box 17, a driving motor 4 is fixedly connected to the side surface of the frame body 1, a first connecting rod 5 is fixedly connected to the output end of the driving motor 4, the first connecting rod 5 is rotatably connected with the stirring rod 6 through a bevel gear, the stirring rod 6 is connected with a rotating rod through bevel gear meshing, the rotating rod penetrates through the frame body 1 and is rotatably connected with the frame body 1, the bottom of the treatment box 17 is connected with a push block 12 through a reset spring in a sliding manner, the bottom of the push block 12 is fixedly connected with a fixed block 13, a first discharge pipe 10 is fixedly connected onto the partition plate 2, the first discharge pipe 10 penetrates through the partition plate 2 and is fixedly connected with the treatment box 17, a second discharge pipe 11 is arranged at the bottom of the treatment box 17, one end, far away from the treatment box 17, of the second discharge pipe 11 penetrates through the side surface of the frame body 1, an air guide pipe 16 is arranged inside the treatment box 17, one end, far away from the treatment box 17, of the air guide pipe 16 extends into the inside of the collection box, mixed sewage is stirred through the stirring rod 6, so that excrement in the sewage can be stirred, the excrement in the mixed sewage is dissolved in water to the maximum degree, the flow of the mixed sewage is convenient, the blocking condition caused by the livestock excrement in the mixed sewage is avoided, the sewage treatment speed is accelerated, thereby further improving the sewage treatment efficiency.

The inside of handling the case 17 is equipped with pushing mechanism, pushing mechanism includes and rotates the first roll roller 8 of being connected with 1 side of framework, 1 side of framework rotates and is connected with second roll roller 9, first roll roller 8 is connected through the conveyer belt transmission with second roll roller 9, fixed the cup joint has the stay cord on the first roll roller 8, the bottom of handling the case 17 is equipped with and holds the chamber, the inside sliding connection who holds the chamber has stopper 14, the one end that first roll roller 8 was kept away from to the stay cord passes through second roll roller 9 and stopper 14 fixed connection, head rod 5 runs through framework 1 and is connected with 1 rotation of framework, stopper 14 and fixed block 13 contact, fixed cup joint has first cylindrical gear 7 on the head rod 5, first cylindrical gear 7 meshes with first roll roller 8, can strike off the bottom of handling the case 17 through ejector pad 12, avoid the bottom to appear deposiing, cause the excrement and urine to remain the condition of handling the incasement portion of handling, effectual promotion is to the clearance of 17 the inside, the traditional sewage treatment in-process has been solved, the phenomenon of handling the case 17 internal sediment of handling, thereby further avoided the contact with the long-time oxidation treatment case bottom to further, thereby the second inner wall 11 that can avoid further taking place the oxidation phenomenon of handling the oxidation to take place.

The inside of the processing box 17 is provided with a touch mechanism, the touch mechanism comprises a fixed frame 18 fixedly connected with the frame body 1, one end of the fixed frame 18 far away from the frame body 1 is fixedly connected with a limit frame 22, the inside of the fixed frame 18 is slidably connected with a sliding plate 21, the sliding plate 21 is rotatably connected with two second connecting rods 20, a touch rod 19 is slidably connected in the fixed frame 18, one end of each second connecting rod 20 far away from the sliding plate 21 is rotatably connected with the corresponding touch rod 19, one end of the sliding plate 21 far away from the touch rod 19 is fixedly connected with a slide rod 23, and the slide rod 23 is slidably connected with the limit frame 22, one of the contact rods 19 penetrates through the first discharging pipe 10, the other contact rod 19 penetrates through the second discharging pipe 11, the side surface of the frame body 1 is rotatably connected with a second cylindrical gear 25 through a rotating shaft, the second cylindrical gear 25 is rotatably connected with a third connecting rod 24 through a rotating shaft, one end, far away from the second cylindrical gear 25, of the third connecting rod 24 is rotatably connected with a sliding rod 23, the second cylindrical gear 25 is connected with a fourth connecting rod 26 through a third cylindrical gear 27 in a meshing manner, the active carbon rod 15 is rotatably sleeved on the rotating rod, the side surface of the frame body 1 is fixedly connected with a collecting box, a plurality of rotating rods in the collecting box are connected through gear meshing, the rotating rods are connected with the fourth connecting rod 26 through gear meshing, and in the sewage treatment process, the touch mechanism is added in the treatment box, so that the touch of the first discharge pipe 10 and the second discharge pipe 11 in the sewage treatment process can be realized, thereby effectively solving the problem that the livestock manure in the sewage is easy to block the first discharge pipe 10 and the second discharge pipe 11 in the sewage treatment process, thereby can avoid among the sewage treatment process, the phenomenon of sewage backward flow appears, can effectually avoid sewage to cause the problem of livestock-raising room internal environment pollution.

It should be noted that, signal connection between control center and the monitoring module, frame 1's inside contains scanning module, adjusting module, control module, response module, processing module, signal connection between scanning module and the adjusting module, signal connection between adjusting module and the control module, signal connection between control module and the response module, signal connection between response module and the processing module, scanning module includes scanning probe 3, adjusting module includes electric telescopic handle, control module includes driving motor 4, response module includes infrared inductor, processing module includes activated carbon pole 15, set up activated carbon pole 15 in the side of sewage case treatment, utilize activated carbon pole 15 can purify harmful gas and smell that poultry excrement and urine produced in the mixed sewage, promote the environment of poultry life, thereby the effectual industry efficiency that promotes the livestock-raising industry, in the whole process, utilize a driving motor 4 to drive, resources have been practiced thrift, certain economic efficiency has, through scanning module, adjusting module, control module, cooperation work between response module and the processing module, realize the mixed sewage treatment system of poultry, this individual system can effectual mixed sewage treatment, the mixed sewage treatment that can not solve in real time, the mixed sewage treatment can's the mixed defect, the mixed sewage treatment in-time, the mixed sewage treatment can the while, the mixed treatment circumstances of the mixed sewage can avoid the mixed sewage to appear the jam.

The invention can be illustrated by the following operating modes:

rais livestock or poultry and produce have faecal mixed sewage and pass through the inside that first discharging pipe 10 on the baffle got into processing case 17, scanning probe 3 carries out real-time detection to 1 inside of framework, control driving motor 4's switch operation, when the mixed sewage in processing case 17 reaches a certain amount and not through second discharging pipe 11 when flowing out, at this moment, the position of the first air duct 16 of the degree of depth of the inside sewage of processing case 17, driving motor 4 drives head rod 5 and rotates, because puddler 6 passes through bevel gear respectively with head rod 5 and dwang meshing, therefore, head rod 5's rotation, can further drive the rotation of puddler 6, thereby can further drive the rotation of dwang, because activated carbon rod 15 rotates and cup joints on the dwang, therefore, the rotation of dwang, can further drive the rotation of activated carbon rod 15.

Meanwhile, the rotation of the first connecting rod 5 can drive the first cylindrical gear 7 fixedly sleeved on the first rotating rod 5 to rotate, because the first rolling roller 8 is meshed with the first cylindrical gear 7, and the limiting block 14 is connected with the accommodating cavity in a sliding manner, the limiting block 14 is connected with the first rolling roller 8 through a pull rope, therefore, when the first rolling roller 8 is driven by the first cylindrical gear 7 to rotate, the limiting block 14 can be driven to slide, because the limiting block 14 is contacted with the pushing block 12 through the fixed block 13, it needs to be explained that the airtightness between the fixed block 13 and the processing box 17 is good, therefore, the movement of the limiting block 14 can further drive the pushing block 12 to move in the processing box 17.

Because the rotating rod is meshed with the fourth connecting rod 26, the fourth connecting rod 26 is meshed with the second cylindrical gear 25, therefore, the rotating rod can further drive the second cylindrical gear 25 to rotate, because the third connecting rod 24 is rotatably connected with the second cylindrical gear 25 through the rotating shaft on the second cylindrical gear 25, the third connecting rod 24 is rotatably connected with the sliding rod 23, the sliding rod 23 slides in the limit frame 22, the sliding rod 23 is fixedly connected with the sliding plate 21, and the contact rod 19 is connected with the sliding plate 21 through the corresponding second connecting rod 20, therefore, when the driving motor 4 runs, the sliding plate 21 can be driven to slide back and forth in the fixed frame 18 to do reciprocating motion, so that the contact rod 19 can touch blockages in the first discharging pipe 10 and the second discharging pipe 11, when the infrared sensor detects that the first discharging pipe 10 is blocked with the second discharging pipe 11, the contact rod 19 is automatically controlled to move, and because the rotating rod 15 is rotatably connected with the rotating rod, the rotating rod 15 cannot drive the rotating rod to rotate.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The livestock breeding mixed sewage treatment integrated system comprises a frame body (1) and is characterized in that the inside of the frame body (1) comprises a control center and a monitoring module, an electric telescopic rod and an infrared sensor are installed inside the frame body (1), a scanning probe (3) is connected to the inside of the frame body (1) through the electric telescopic rod in a rotating mode, a partition plate (2) is arranged inside the frame body (1), a treatment box (17) is fixedly installed below the partition plate (2) inside the frame body (1), a stirring rod (6) is connected to the bottom of the partition plate (2) in a rotating mode, one end, far away from the partition plate (2), of the stirring rod (6) extends to the inside of the treatment box (17) and is connected with the treatment box (17) in a rotating mode, a driving motor (4) is fixedly connected to the side face of the frame body (1), a first connecting rod (5) is fixedly connected to the output end of the driving motor (4), the first connecting rod (5) is connected with the stirring rod (6) through a bevel gear in a rotating mode, the stirring rod (6) is connected with a rotating mode through bevel gear meshing, a reset block (12) is connected with the bottom of the bevel gear (17) in a sliding mode, a first discharge pipe (10) is fixedly connected to the partition plate (2), the first discharge pipe (10) penetrates through the partition plate (2) and is fixedly connected with a treatment box (17), a second discharge pipe (11) is arranged at the bottom of the treatment box (17), one end, far away from the treatment box (17), of the second discharge pipe (11) penetrates through the side face of the frame body (1), a pushing mechanism is arranged inside the treatment box (17), and a triggering mechanism is arranged inside the treatment box (17);

the trigger mechanism comprises a fixed frame (18) fixedly connected with the frame body (1), one end, far away from the frame body (1), of the fixed frame (18) is fixedly connected with a limiting frame (22), a sliding plate (21) is slidably connected inside the fixed frame (18), the sliding plate (21) is rotatably connected with two second connecting rods (20), contact rods (19) are slidably connected inside the fixed frame (18), one end, far away from the sliding plate (21), of each second connecting rod (20) is rotatably connected with the corresponding contact rod (19), one end, far away from the contact rod (19), of each sliding plate (21) is fixedly connected with a sliding rod (23), the sliding rods (23) are slidably connected with the limiting frame (22), one contact rod (19) penetrates through the inside of the first discharge pipe (10), and the other contact rod (19) penetrates through the inside of the second discharge pipe (11);

a second cylindrical gear (25) is rotatably connected to the side face of the frame body (1) through a rotating shaft, a third connecting rod (24) is rotatably connected to the second cylindrical gear (25) through the rotating shaft, one end, far away from the second cylindrical gear (25), of the third connecting rod (24) is rotatably connected with the sliding rod (23), and the second cylindrical gear (25) is connected with a fourth connecting rod (26) through a third cylindrical gear (27) in a meshed mode;

the active carbon pole (15) have been cup jointed in the rotation on the dwang, the side fixedly connected with collecting box of framework (1), a plurality of dwangs pass through gear engagement in the collecting box and connect, the dwang passes through gear engagement with fourth connecting rod (26) and is connected.

2. The livestock breeding mixed sewage treatment integrated system according to claim 1, wherein the pushing mechanism comprises a first rolling roller (8) rotatably connected with the side surface of the frame body (1), a second rolling roller (9) is rotatably connected with the side surface of the frame body (1), the first rolling roller (8) and the second rolling roller (9) are connected through a conveyor belt transmission, a pull rope is fixedly sleeved on the first rolling roller (8), a containing cavity is arranged at the bottom of the treatment box (17), a limiting block (14) is slidably connected inside the containing cavity, and one end of the pull rope, which is far away from the first rolling roller (8), is fixedly connected with the limiting block (14) through the second rolling roller (9).

3. The livestock breeding mixed sewage treatment integrated system according to claim 2, wherein the first connecting rod (5) penetrates through the frame body (1) and is rotatably connected with the frame body (1), the limiting block (14) is in contact with the fixed block (13), the first connecting rod (5) is fixedly sleeved with the first cylindrical gear (7), and the first cylindrical gear (7) is meshed with the first rolling roller (8).

4. The livestock breeding mixed sewage treatment integrated system according to claim 1, wherein the treatment tank (17) is provided with a gas-guide tube (16) inside, and one end of the gas-guide tube (16) far away from the treatment tank (17) extends to the inside of the collection tank.

5. The livestock-raising mixed sewage treatment integrated system according to claim 1, wherein the control center is in signal connection with the monitoring module, the frame body (1) comprises a scanning module, a regulating module, a control module, a sensing module and a processing module, the scanning module is in signal connection with the regulating module, the regulating module is in signal connection with the control module, the control module is in signal connection with the sensing module, and the sensing module is in signal connection with the processing module.

6. A livestock-raising mixed sewage treatment integrated system according to claim 5, characterized in that said scanning module comprises a scanning probe (3), said adjusting module comprises an electric telescopic rod, said control module comprises a driving motor (4), said sensing module comprises an infrared sensor, and said processing module comprises an activated carbon rod (15).