CN210825713U - Multistage sewage treatment device - Google Patents

Abstract

The utility model discloses a multistage sewage treatment device, which comprises a housin, the left side fixedly connected with riser at casing inner chamber top, the front side, rear side and the bottom of riser all with the inner wall fixed connection of casing, the right side fixedly connected with L template at casing inner chamber top, the front side, rear side and the right side of L template all with the inner wall fixed connection of casing, the right side fixedly connected with water collection sheet of riser, the through-hole has been seted up at water collection sheet's top, water collection sheet's front side, rear side and right side all with the inner wall fixed connection of casing, water collection sheet is located the below of L template. The utility model discloses possess the advantage to sewage multiple treatment, it is poor to the sewage treatment effect to have solved present multistage sewage treatment device, can not make sewage treatment not up to standard to sewage multiple treatment to cause the pollution to the water resource, influence people's quality of life and healthy problem.

Description

Multistage sewage treatment device

Technical Field

The utility model relates to a sewage treatment technical field specifically is a multistage sewage treatment device.

Background

Along with the continuous development of social and economic levels and the promotion of urbanization, the total discharge amount of urban industrial wastewater and domestic sewage is increased year by year, and a lot of untreated wastewater, sewage and sludge in the sewage are directly discharged, so that the water quality and soil of rivers and underground water are seriously polluted, the existing multi-stage sewage treatment equipment has poor sewage treatment effect, can not treat sewage for multiple times, and can not reach the standard in sewage treatment, so that the pollution to water resources is caused, and the life quality and the body health of people are influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage sewage treatment device possesses the advantage to sewage multiple treatment, and it is poor to sewage treatment effect to have solved present multistage sewage treatment device, can not make sewage treatment not up to standard to sewage multiple treatment to cause the pollution to the water resource, influence people's quality of life and healthy problem.

In order to achieve the above object, the utility model provides a following technical scheme: a multistage sewage treatment device comprises a shell, wherein a vertical plate is fixedly connected to the left side of the top of an inner cavity of the shell, the front side, the rear side and the bottom of the vertical plate are fixedly connected with the inner wall of the shell, an L-shaped plate is fixedly connected to the right side of the top of the inner cavity of the shell, the front side, the rear side and the right side of the L-shaped plate are fixedly connected with the inner wall of the shell, a water collecting plate is fixedly connected to the right side of the vertical plate, a through hole is formed in the top of the water collecting plate, the front side, the rear side and the right side of the water collecting plate are fixedly connected with the inner wall of the shell, the water collecting plate is positioned below the L-shaped plate, a water inlet pipe is fixedly communicated to the left side of the shell, a resin box is fixedly connected to the left side of the shell, a short pipe is fixedly communicated to the, the bottom of the motor rotating shaft penetrates into the inner cavity of the shell and is fixedly connected with a long rod, the two sides of the long rod are fixedly connected with stirring plates, the left side of the vertical plate is fixedly connected with a funnel, the front side, the right side and the left side of the funnel are fixedly connected with the inner wall of the shell, the bottom of the funnel is fixedly communicated with a round pipe, the surface of the round pipe is provided with a solenoid valve, the left side of the vertical plate is movably connected with a filter plate, the front side, the rear side and the left side of the filter plate are movably connected with the inner wall of the shell, the filter plate is positioned below the round pipe, the left bottom of the shell is fixedly connected with a water pump through a support, a water inlet pipe of the water pump is fixedly communicated with the left bottom of the shell, a water outlet pipe of the water pump is fixedly communicated with a water pipe, one, the top on the right side of the vertical plate is fixedly connected with a reaction layer, the right side of the reaction layer is fixedly connected with the left side of the L-shaped plate, the front side and the rear side of the reaction layer are fixedly connected with the inner wall of the shell, the reaction layer is positioned below the water spraying plate, the top on the right side of the L-shaped plate is fixedly connected with a hydrogen peroxide box, the front side, the rear side, the right side and the top of the hydrogen peroxide box are fixedly connected with the inner wall of the shell, the right side of the top of the shell is fixedly communicated with a liquid adding pipe, the bottom of the liquid adding pipe penetrates through the inner cavity of the hydrogen peroxide box, the bottom of the left side of the hydrogen peroxide box is fixedly communicated with a liquid conveying pipe, one end of the liquid conveying pipe, which is far away from the hydrogen peroxide box, penetrates through the L-shaped plate to extend to the inner cavity of the shell and, the one end that ozone generator was kept away from to the air feed pipe runs through the L template and extends to the inner chamber of casing and with the fixed intercommunication in bottom on reaction layer, the bottom fixedly connected with activated carbon adsorption layer on riser right side, activated carbon adsorption layer's front side, right side and right side all with the inner wall fixed connection of casing, the fixed intercommunication in bottom on casing right side has the drain pipe.

Preferably, the number of the through holes is several, and the through holes are circular.

Preferably, the front left side of the shell is movably connected with a first box door through a hinge, a first handle is fixedly connected to the front top of the first box door, grooves are formed in the left side of an inner cavity of the shell and the left side of a vertical plate, sliding blocks are fixedly connected to the two sides of the filter plate, and one ends, close to the grooves, of the sliding blocks penetrate through the inner cavity of the grooves and are in sliding connection with the grooves.

Preferably, the reaction layer is honeycomb-shaped, and is made of polytetrafluoroethylene material.

Preferably, the controller is fixedly connected to the top of the front face of the shell and is electrically connected with the motor, the electromagnetic valve, the water pump and the ozone generator respectively.

Preferably, the left side fixedly connected with observation window at casing positive top, the front spraying of observation window has the scale mark.

Preferably, the right side of the top of the front surface of the shell is movably connected with a second box door through a hinge, and the left side of the second box door is fixedly connected with a second handle.

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

1. the utility model discloses a casing, the riser, the L template, the water-collecting plate, the through-hole, the inlet tube, the resin case, the nozzle stub, including a motor, an end cap, a controller, and a cover plate, the stock, the stirring board, the funnel, the pipe, the solenoid valve, the filter, a water pump, the water pipe, the water spray board, the reaction layer, the hydrogen peroxide case, the liquid feeding pipe, the transfer line, ozone generator, the induction-pipe, activated carbon adsorption layer and drain pipe cooperate, possess the advantage to sewage multiple treatment, it is poor to sewage treatment effect to have solved present multistage sewage treatment equipment, can not handle sewage multiple times, make sewage treatment not up to standard, thereby cause the pollution to the water resource, influence people's quality of life and healthy.

2. The utility model discloses a set up the motor, stock and stirring board, stir the sewage of adding the resin, make the resin better adsorb the heavy metal ion in the sewage, through setting up the funnel, make the resin and the deposit that heavy metal ion formed, can smoothly enter the filter through the pipe and filter, through setting up hydrogen peroxide case, ozone generator and active carbon adsorption layer, ozone gas and the hydroxyl radical that hydrogen peroxide solution produced remove the difficult degradation organic matter in the sewage, and remove the suspended solid through the active carbon adsorption layer, can effectively remove the organic matter in the sewage, through setting up water-collecting plate and through-hole, be favorable to passing through the sewage of reaction layer can pass through whole active carbon adsorption layer, increase the utilization ratio of active carbon adsorption layer, through setting up recess and slider, support the filter, facilitate the installation of filter, through setting up first chamber door, the filter is conveniently taken out, clear up or change, through setting up the reaction layer, the reaction layer is inside to be cellular, increase ozone and hydrogen peroxide and the contact probability of sewage, make the reaction more abundant, the reaction layer is made by polytetrafluoroethylene material, polytetrafluoroethylene material has strong corrosion resistance, can resist the erosion of ozone, hydrogen peroxide and sewage, through setting up the observation window, conveniently observe the condition of intaking of casing sewage, through setting up the second chamber door, make things convenient for maintenance personal to maintain ozone generator.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the present invention;

fig. 3 is an enlarged schematic view of a in fig. 1 according to the present invention.

In the figure: the device comprises a shell 1, a vertical plate 2, a 3L-shaped plate, a water collecting plate 4, a through hole 5, a water inlet pipe 6, a resin box 7, a short pipe 8, a motor 9, a long rod 10, a stirring plate 11, a funnel 12, a round pipe 13, an electromagnetic valve 14, a filter plate 15, a water pump 16, a water pipe 17, a water spraying plate 18, a reaction layer 19, a hydrogen peroxide box 20, a liquid adding pipe 21, a liquid conveying pipe 22, an ozone generator 23, an air feeding pipe 24, an activated carbon adsorption layer 25, a water discharging pipe 26, a groove 27, a sliding block 28 and a controller 29.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses a casing 1, riser 2, L template 3, water-collecting plate 4, through-hole 5, inlet tube 6, resin case 7, nozzle stub 8, motor 9, stock 10, stirring board 11, funnel 12, pipe 13, solenoid valve 14, filter 15, water pump 16, water pipe 17, water spray plate 18, reaction layer 19, hydrogen peroxide case 20, filling tube 21, transfer line 22, ozone generator 23, air supply pipe 24, active carbon adsorption layer 25, drain pipe 26, recess 27, slider 28 and controller 29 part are general standard or the part that technical staff in the field knows, its structure and principle all can all be known or can be known through conventional experimental method for this technical staff through the technical manual.

Referring to fig. 1-3, a multistage sewage treatment device comprises a shell 1, wherein a vertical plate 2 is fixedly connected to the left side of the top of an inner cavity of the shell 1, the front side, the rear side and the bottom of the vertical plate 2 are fixedly connected with the inner wall of the shell 1, an L-shaped plate 3 is fixedly connected to the right side of the top of the inner cavity of the shell 1, the front side, the rear side and the right side of the L-shaped plate 3 are fixedly connected with the inner wall of the shell 1, a water collecting plate 4 is fixedly connected to the right side of the vertical plate 2, a through hole 5 is formed in the top of the water collecting plate 4, the front side, the rear side and the right side of the water collecting plate 4 are fixedly connected with the inner wall of the shell 1, the water collecting plate 4 is positioned below the L-shaped plate 3, a water inlet pipe 6 is fixedly communicated with the left side of the shell 1, a resin tank 7 is fixedly, the left side of the top of the shell 1 is fixedly connected with a motor 9, the bottom of a rotating shaft of the motor 9 penetrates through the inner cavity of the shell 1 and is fixedly connected with a long rod 10, both sides of the long rod 10 are fixedly connected with a stirring plate 11, the left side of a vertical plate 2 is fixedly connected with a funnel 12, the front side, the right side and the left side of the funnel 12 are fixedly connected with the inner wall of the shell 1, the bottom of the funnel 12 is fixedly communicated with a round pipe 13, the surface of the round pipe 13 is provided with an electromagnetic valve 14, the left side of the vertical plate 2 is movably connected with a filter plate 15, the front side, the rear side and the left side of the filter plate 15 are movably connected with the inner wall of the shell 1, the filter plate 15 is positioned below the round pipe 13, the bottom of the left side of the shell 1 is fixedly connected with a water pump 16 through a support, a water inlet pipe 6 of the water pump 16 is fixedly, the water spraying plate 18 is positioned between the vertical plate 2 and the L-shaped plate 3, the top on the right side of the vertical plate 2 is fixedly connected with a reaction layer 19, the right side of the reaction layer 19 is fixedly connected with the left side of the L-shaped plate 3, the front side and the rear side of the reaction layer 19 are both fixedly connected with the inner wall of the shell 1, the reaction layer 19 is positioned below the water spraying plate 18, the top on the right side of the L-shaped plate 3 is fixedly connected with a hydrogen peroxide box 20, the front side, the rear side, the right side and the top of the hydrogen peroxide box 20 are all fixedly connected with the inner wall of the shell 1, the right side of the top of the shell 1 is fixedly communicated with a liquid feeding pipe 21, the bottom of the liquid feeding pipe 21 penetrates through the inner cavity of the hydrogen peroxide box 20, the bottom on the left side of the hydrogen peroxide box 20 is fixedly communicated with a liquid conveying pipe 22, one end of the liquid conveying pipe 22, far away, an air supply pipe 24 is fixedly communicated with the left side of an ozone generator 23, one end of the air supply pipe 24, which is far away from the ozone generator 23, penetrates through an L-shaped plate 3, extends to an inner cavity of a shell 1 and is fixedly communicated with the bottom of a reaction layer 19, an activated carbon adsorption layer 25 is fixedly connected with the bottom of the right side of a vertical plate 2, the front side, the right side and the right side of the activated carbon adsorption layer 25 are fixedly connected with the inner wall of the shell 1, a drain pipe 26 is fixedly communicated with the bottom of the right side of the shell 1, a motor 9, a long rod 10 and a stirring plate 11 are arranged to stir sewage added with resin, so that the resin can better adsorb heavy metal ions in the sewage, a funnel 12 is arranged to enable the resin and the heavy metal ions to form precipitates, the resin and the heavy metal ions can smoothly enter a filter plate 15 through a circular pipe 13 to be filtered, and through the arrangement of a hydrogen peroxide box 20, the ozone generator 23 and, suspended matters are removed through the activated carbon adsorption layer 25, organic matters in sewage can be effectively removed, the number of the through holes 5 is a plurality, the through holes 5 are circular, the water collection plate 4 and the through holes 5 are arranged, the sewage passing through the reaction layer 19 can pass through the whole activated carbon adsorption layer 25, the utilization rate of the activated carbon adsorption layer 25 is increased, the front left side of the shell 1 is movably connected with a first box door through a hinge, the front top of the first box door is fixedly connected with a first handle, the left side of the inner cavity of the shell 1 and the left side of the vertical plate 2 are both provided with grooves 27, the two sides of the filter plate 15 are both fixedly connected with sliding blocks 28, one end of each sliding block 28 close to each groove 27 penetrates through the inner cavity of the groove 27 and is in sliding connection with the groove 27, the filter plate 15 is supported by arranging the grooves 27 and the sliding blocks 28, the installation of the filter plate 15 is, the cleaning or replacement is carried out, the reaction layer 19 is cellular, the reaction layer 19 is made of polytetrafluoroethylene materials, the reaction layer 19 is arranged, the reaction layer 19 is cellular, the contact probability of ozone and hydrogen peroxide with sewage is increased, the reaction is more sufficient, the reaction layer 19 is made of polytetrafluoroethylene materials, the polytetrafluoroethylene materials have strong corrosion resistance and can resist the erosion of the ozone, the hydrogen peroxide and the sewage, the controller 29 is fixedly connected to the top of the front face of the shell 1, the controller 29 is respectively and electrically connected with the motor 9, the electromagnetic valve 14, the water pump 16 and the ozone generator 23, the left side of the top of the front face of the shell 1 is fixedly connected with an observation window, the front face of the observation window is sprayed with scale marks, the observation window is arranged to facilitate the observation of the water inlet condition of the sewage of the shell 1, the right side of the top of the front face of the shell 1 is movably connected with a second box door through a hinge, and the, through setting up the second chamber door, make things convenient for maintenance personal to maintain ozone generator 23, through casing 1, riser 2, L template 3, water-collecting plate 4, through-hole 5, inlet tube 6, resin box 7, nozzle stub 8, motor 9, stock 10, stirring board 11, funnel 12, pipe 13, solenoid valve 14, filter 15, water pump 16, water pipe 17, water spray plate 18, reaction layer 19, hydrogen peroxide case 20, liquid feeding pipe 21, transfer line 22, ozone generator 23, air feed pipe 24, active carbon adsorption layer 25 and drain pipe 26 cooperate, possess the advantage of handling sewage many times, it is poor to sewage treatment effect to have solved present multistage sewage treatment equipment, can not handle sewage many times, make sewage treatment not up to standard, thereby cause the pollution to the water resource, influence the problem of the quality of life and the healthy of people.

When in use, sewage enters the inner cavity of the shell 1 through the water inlet pipe 6, resin in the resin box 7 enters the inner cavity of the shell 1 through the short pipe 8 and falls into the sewage, the controller 29 controls the operation of the rotating shaft of the motor 9, the rotating shaft of the motor 9 drives the long rod 10 to rotate, the rotation of the long rod 10 drives the stirring plate 11 to rotate, the sewage is stirred, so that the resin can better adsorb heavy metal ions in the sewage, after the adsorption is completed, the controller 29 controls the opening of the electromagnetic valve 14, the sewage and sediments enter the filter plate 15 through the circular pipe 13 to be filtered, the sediments are gathered above the filter plate 15, the sewage enters the bottom of the inner cavity of the shell 1, the controller 29 controls the operation of the water pump 16, the sewage at the bottom of the inner cavity of the shell 1 enters the water spraying plate 18 through the water pipe 17 to be sprayed, the sprayed sewage enters the reaction layer 19, the controller 29 controls the operation of the ozone generator, ozone that ozone generator 23 produced enters into reaction layer 19 through the air feed pipe, hydrogen peroxide in hydrogen peroxide case 20 passes through transfer line 22 and enters into reaction layer 19, ozone gas and the hydroxyl free radical that hydrogen peroxide solution produced remove the difficult degradation organic matter in the sewage, form the suspended solid, suspended solid and sewage advance water-collecting plate 4, the suspended solid and the sewage that enter into water-collecting plate 4 enter into active carbon adsorption layer 25 through-hole 5 and adsorb, get rid of the suspended solid through active carbon adsorption layer 25, sewage enters into the bottom of casing 1 inner chamber through active carbon adsorption layer 25, sewage discharges through the drain pipe.

In summary, the following steps: this multistage sewage treatment device, through casing 1, riser 2, L template 3, water-collecting plate 4, through-hole 5, inlet tube 6, resin tank 7, nozzle stub 8, motor 9, stock 10, stirring board 11, funnel 12, pipe 13, solenoid valve 14, filter 15, water pump 16, water pipe 17, water spray plate 18, reaction layer 19, hydrogen peroxide tank 20, filling tube 21, transfer line 22, ozone generator 23, blast pipe 24, active carbon adsorption layer 25 and drain pipe 26 cooperate, it is poor to the sewage treatment effect to have solved present multistage sewage treatment device, can not handle sewage many times, make sewage treatment not up to standard, thereby cause the pollution to the water resource, influence people's quality of life and healthy problem.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a multistage sewage treatment device, includes casing (1), its characterized in that: the water collecting device is characterized in that a vertical plate (2) is fixedly connected to the left side of the top of an inner cavity of the shell (1), the front side, the rear side and the bottom of the vertical plate (2) are fixedly connected with the inner wall of the shell (1), an L-shaped plate (3) is fixedly connected to the right side of the top of the inner cavity of the shell (1), the front side, the rear side and the right side of the L-shaped plate (3) are fixedly connected with the inner wall of the shell (1), a water collecting plate (4) is fixedly connected to the right side of the vertical plate (2), a through hole (5) is formed in the top of the water collecting plate (4), the front side, the rear side and the right side of the water collecting plate (4) are fixedly connected with the inner wall of the shell (1), the water collecting plate (4) is located below the L-shaped plate (3), a water inlet pipe (6) is fixedly communicated with the left side of the top of the shell (1), a resin tank (7, the right end of the short pipe (8) penetrates through the inner cavity of the shell (1), the left side of the top of the shell (1) is fixedly connected with a motor (9), the bottom of a rotating shaft of the motor (9) penetrates through the inner cavity of the shell (1) and is fixedly connected with a long rod (10), the two sides of the long rod (10) are fixedly connected with a stirring plate (11), the left side of the vertical plate (2) is fixedly connected with a funnel (12), the front side, the right side and the left side of the funnel (12) are fixedly connected with the inner wall of the shell (1), the bottom of the funnel (12) is fixedly communicated with a round pipe (13), the surface of the round pipe (13) is provided with an electromagnetic valve (14), the left side of the vertical plate (2) is movably connected with a filter plate (15), the front side, the rear side and the left side of the filter plate (15) are movably connected with the inner wall of the shell (1, the device is characterized in that a water pump (16) is fixedly connected to the left bottom of the shell (1) through a support, a water inlet pipe (6) of the water pump (16) is fixedly communicated with the left bottom of the shell (1), a water outlet pipe of the water pump (16) is fixedly communicated with a water pipe (17), one end, far away from the water pump (16), of the water pipe (17) penetrates through an inner cavity of the shell (1) and is fixedly connected with a water spraying plate (18), the water spraying plate (18) is located between a vertical plate (2) and an L-shaped plate (3), a reaction layer (19) is fixedly connected to the top of the right side of the vertical plate (2), the right side of the reaction layer (19) is fixedly connected with the left side of the L-shaped plate (3), the front side and the rear side of the reaction layer (19) are fixedly connected with the inner wall of the shell (1), the reaction layer (19) is located below the water spraying plate (18), and, the front side, the rear side, the right side and the top of the hydrogen peroxide box (20) are fixedly connected with the inner wall of the shell (1), the right side of the top of the shell (1) is fixedly communicated with a liquid adding pipe (21), the bottom of the liquid adding pipe (21) is penetrated through to the inner cavity of the hydrogen peroxide box (20), the left bottom of the hydrogen peroxide box (20) is fixedly communicated with a liquid conveying pipe (22), one end of the liquid conveying pipe (22), which is far away from the hydrogen peroxide box (20), is penetrated through the L-shaped plate (3) and is extended to the inner cavity of the shell (1) and is fixedly communicated with the top of the reaction layer (19), the top of the L-shaped plate (3) is fixedly connected with an ozone generator (23), the left side of the ozone generator (23) is fixedly communicated with a gas conveying pipe (24), one end of the gas conveying pipe (24), which is far away from the ozone generator (23), is penetrated through the L-shaped plate (3) and is, the bottom fixedly connected with active carbon adsorption layer (25) on riser (2) right side, the front side, the right side and the right side of active carbon adsorption layer (25) all with the inner wall fixed connection of casing (1), the bottom fixed intercommunication on casing (1) right side has drain pipe (26).

2. The multistage sewage treatment apparatus according to claim 1, wherein: the number of the through holes (5) is a plurality, and the shape of the through holes (5) is circular.

3. The multistage sewage treatment apparatus according to claim 1, wherein: the utility model discloses a filter screen, including casing (1), riser (2), the equal fixedly connected with slider (28) in both sides of filter (15), the one end that slider (28) are close to recess (27) run through to the inner chamber of recess (27) and with recess (27) sliding connection, the positive left side of casing (1) has first chamber door through hinge swing joint, the positive top fixedly connected with first in command of first chamber door, recess (27) are all seted up to the left side of casing (1) inner chamber and the left side of riser (2).

4. The multistage sewage treatment apparatus according to claim 1, wherein: the reaction layer (19) is honeycomb-shaped, and the reaction layer (19) is made of polytetrafluoroethylene materials.

5. The multistage sewage treatment apparatus according to claim 1, wherein: the top of the front surface of the shell (1) is fixedly connected with a controller (29), and the controller (29) is respectively and electrically connected with the motor (9), the electromagnetic valve (14), the water pump (16) and the ozone generator (23).

6. The multistage sewage treatment apparatus according to claim 1, wherein: the left side fixedly connected with observation window at casing (1) positive top, the front spraying of observation window has the scale mark.

7. The multistage sewage treatment apparatus according to claim 1, wherein: the right side of the top of the front surface of the shell (1) is movably connected with a second box door through a hinge, and the left side of the second box door is fixedly connected with a second handle.

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