KR102018647B1 - Sewage treatment vehicle - Google Patents

Abstract

The present invention is to provide a sewage treatment vehicle, which separates and filters water after vacuum-sucking sediments and wastewater stacked in an underground structure. To this end, the sewage treatment vehicle of the present invention comprises: a wastewater tank for sucking wastewater in an underground structure with a suction hose using a negative pressure of a vacuum pump; a stirring tank for forming floc by receiving the wastewater of the wastewater tank through a pumping action of a transfer pump, and receiving and mixing a water purifying agent; a chemical feeder for feeding the water purifying agent into the stirring tank in a predetermined amount; a dehydrating tank for receiving the wastewater from the stirring tank to filter and remove sediments or floating matters contained in the wastewater; at least one fiber yarn filter for receiving the wastewater of the dehydrating tank by the pumping action of the transfer pump to filter the same; at least one washing water tank for receiving the water having the sediment filtered by the fiber yarn filter by the pumping action of the transfer pump, and storing the same; and a high-pressure washer for discharging washing water of the washing water tank at a high pressure using a hydraulic pump.

Description

Sewage Treatment Trucks {SEWAGE TREATMENT VEHICLE}

The present invention relates to a sewage treatment car that sprays water at a high pressure to a fixed sediment such as sludge or dirt and foreign matter accumulated in an underground structure such as a sewage pipe, and breaks, dilutes or washes down the sediment with its power, and removes it by vacuum suction. More specifically, a sewage treatment vehicle for vacuuming sediment and wastewater accumulated in an underground structure, and separating and filtering the water to pierce a blocked portion of the underground structure or reuse it as washing water for dilution and rinsing to suck up the sediment. will be.

In general, underground structures, such as sewer pipes, underground pipelines, underground cavities, underground drainage channels, underground tanks, sewage treatment facilities, and underground power plants, are placed on the road for human access for cleaning, inspection, repair, and repair. Manholes are installed at regular intervals.

Through such manholes, when sludge, dirt, etc., and foreign matters such as garbage, leaves, and soil accumulate in heavy rains, flooding, backwater damage, as well as odor generation and pest habitat environment, etc. Due to the high level of concern, dredging works are being carried out periodically to remove deposits in underground structures.

For example, a so-called dredging car that pumps high-pressure water to sediment, such as sludge and dirt in an underground structure, smashes it with its power, washes it, dilutes it, and then vacuums it inside the tank with a vacuum pump to suck up the sediment. The dredging work used is common.

Referring to FIG. 1, the conventional dredging vehicle 1 is equipped with a sludge tank 5 and a vacuum pump 6 for suctioning and removing sediment, and water to pierce a blockage or crush and dilute the sediment and suck it out. Equipped with a high pressure water pump to inject water stored in the tank at high pressure.

However, this has to be discharged to the outside when the sludge tank (5) is full of sediment and sewage and there is a problem that the hassle and inconvenience to fill the water tank from time to time, the efficiency and economic efficiency of the work is inferior.

Here, the above-described background or the prior art is merely to help the present inventors understand or understand the technical meaning of the present invention as information obtained in the process of deriving the present invention, and the technology to which the present invention belongs before the application of the present invention. It does not mean that the technology is widely known in the field.

KR 10-1093207 B1 (2011.12.06) KR 10-0421443 B1 (2004.02.23) KR 10-1839817 B1 (2018.03.13)

Accordingly, the present inventors focus on solving the limitations and problems of the existing dredging vehicle while comprehensively considering the above-mentioned matters, and vacuum suction the sediment and wastewater accumulated in the underground structure, and then effectively separate and filter the water to underground structure. While trying to develop a new sewage treatment vehicle that can be reused as a high-pressure wash water for diluting and rinsing out the clogged portion or sucking the sediment, the present invention was continuously studied as a result. Was created.

Therefore, the technical problem and object to be solved by the present invention is to vacuum the sediment and waste water accumulated in the underground structure to separate and remove the sediment and to filter the waste water, and the purified water to break and dilute the sediment accumulated in the underground structure It is to provide a sewage treatment vehicle that can be reused as the washing water for the purpose of washing or washing.

The technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

Specific means according to an embodiment of the present invention for achieving the object as described above and to solve the technical problem is a waste water tank for sucking the waste water in the underground structure with a suction hose using the negative pressure of the vacuum pump, the waste water of the waste water tank Is supplied by the pumping action of the transfer pump and supplied with a water purifier to mix to form a floc (floc), a chemical injector for inputting a certain amount of water purifier into the stirring tank, the waste water is supplied from the stirring tank into the waste water Dehydration tank for trapping and removing the sediment or suspended matter present, at least one fiber yarn filter for receiving and filtering the waste water of the dehydration tank by the pumping action of the transfer pump, the pumping action of the water transported by the sediment filtered in the fiber yarn filter At least one wash water tank and the wash water The present invention proposes a sewage treatment vehicle which includes a high pressure washing machine for discharging washing water of a tank at a high pressure using a hydraulic pump.

As a result, the present invention can coagulate and dehydrate the sediment and wastewater accumulated in the underground structure by vacuum suction together, separate and remove the sludge cake, and then filter the sediment accumulated in the underground structure by rinsing, diluting or washing it. .

In a preferred embodiment of the present invention, the agitation tank is supplied with the waste water and the water purifier from the chemical feeder from the waste water tank, and the rapid impeller is settled in the rapid stirring bath and the rapid stirring bath in which the high speed rotation is mixed with the driving force of the first motor. The slow impeller includes a slow stirring tank, which is slowly rotated and mixed with the driving force of the second motor to form a floc in the wastewater and water purification agent mixture transferred to the phenomenon, and the dehydration tank includes a support angle mounted on the inner circumference and the slow speed. An overflow guide installed on the wall between the agitator tank and overflowing the waste water and the floc in the upper portion of the slow stirring tank, and installed with the upper portion mounted on the bearing angle, and filtering the waste water transferred through the overflow guide and adsorbing the floc. The sludge blanket and separating the sludge cake by By including a drain valve for discharging the purified water filtered out through the rug blanket, the waste water and the water purifier are subjected to flash mixing in a rapid stirring tank, transferred to a slow stirring tank, and forms a floc, thereby further depositing sediment or foreign matter. Can be separated and filtered more quickly and effectively.

In a preferred embodiment of the present invention, the fiber yarn filter has a casing having a wastewater inlet and a backwash water outlet formed on both sides thereof and a connecting pipe for wastewater discharge and backwash water inflow formed thereon, and the connecting pipe and a central portion of the casing. A strainer installed to pass through and having a plurality of voids arranged in the circumference thereof, a plurality of fine fiber yarn bundles arranged to surround the strainer in the casing, a floating hole located below the fine fiber yarn bundles in the casing, and the fine fiber Air for supplying compressed air at high pneumatic pressure through the air supply pipe through the air supply pipe and the air supply pipe for blowing the compressed air under the float to increase the air gap under the float to relax the yarn bundle. It consists of a compressor, which is attached to the fiber bundle Fine deposits can be removed quickly with backwash to prevent clogging.

In a preferred embodiment of the present invention, the high pressure washer is connected to the washing water tank and the hydraulic pump to form a long length while being parallel with the nozzle gun and the nozzle gun and connected to the waste water tank and the vacuum pump. It is possible to maximize the efficiency of the operation by further comprising a suction pipe for sucking the washing water and waste water scattered by the high pressure injection action of the nozzle gun.

A preferred embodiment of the present invention is further provided with an air nozzle for supplying oxygen to the waste water in the agitator tank to cause aeration, thereby increasing oxygen in the water due to air injection and at the same time mixing the water purification agent more effectively, thereby improving sludge solidification. It can be done quickly and efficiently separate excess harmful contaminants that are difficult to separate from waste water.

In another preferred embodiment of the present invention, a support is provided which can be folded or unfolded on one side of the vehicle body, and the support is equipped with a chain block for lifting and lowering the manhole cover with a small force to close the entrance and exit of the underground structure during operation. The manhole cover can be opened easily and easily.

Embodiments of the present invention having a means and a configuration for achieving the above object and the technical problem is, by vacuum suction the sediment and waste water accumulated in the underground structure, and then physically and chemically aggregated various contaminants such as sludge cake Can be separated and removed, and filtered using a secondary pressure fiber yarn filter to send it to the stream in a clean state, or to reuse it as washing water for breaking, diluting or washing down the deposits accumulated in underground structures. .

Therefore, there is no hassle and inconvenience of filling clean water from time to time, unlike conventional water, thereby improving the efficiency and economic efficiency of the work.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an exemplary view showing a sewage treatment difference according to the prior art.
2 is a configuration diagram schematically showing a sewage treatment difference according to an embodiment of the present invention.
3 is a side view schematically showing a sewage treatment difference according to an embodiment of the present invention.
4 is a plan view schematically showing a sewage treatment difference according to an embodiment of the present invention.
5 is a side view showing a part of a high pressure washer among the components constituting the sewage treatment difference according to an embodiment of the present invention.
6 is a plan view schematically showing a stirring tank and a dehydration tank among the components constituting the sewage treatment difference according to an embodiment of the present invention.
7 and 8 are cross-sectional views schematically showing a stirring tank and a dehydration tank among the components constituting the sewage treatment difference according to an embodiment of the present invention.
9 is a cross-sectional view schematically showing a fiber yarn filter among the components constituting the sewage treatment difference according to an embodiment of the present invention.
10 is a cross-sectional view schematically showing a state of use of the fiber yarn filter of the components constituting the sewage treatment difference according to an embodiment of the present invention.
11 is a side view showing a local part of the sewage treatment car according to another embodiment of the present invention.
12 is a side view showing a state in which the support is unfolded among the components of the sewage treatment vehicle according to another embodiment of the present invention.
FIG. 13 is a rear view illustrating a state in which a support stand is folded among components of a sewage treatment vehicle according to another embodiment of the present invention. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms to be described below are defined in consideration of functions in the present invention, which clearly indicates that the concept is to be interpreted in a concept consistent with the technical spirit of the present invention and commonly used or commonly recognized in the art.

In addition, when it is determined that the detailed description of known functions or configurations related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings are exaggerated or simplified in order to explain and explain the structure and operation of the technology for convenience and clarity, and it is to be understood that each component does not exactly match the actual size and shape.

In addition, as used herein, the term and / or means a combination of a plurality of related items or any item of a plurality of related items, and when a part includes any component, this is a particularly opposite description. Unless otherwise indicated, it does not exclude other components, which means that other components may be further included.

In other words, it means that there is a feature, number, steps, actions, components, parts or a combination thereof described in the present specification, one or more other features or numbers, step action components, parts or a combination thereof It should be understood that they do not exclude the presence or the possibility of adding them.

In addition, the terms "unit" and "unit" mean a module form that functions as a unit or a role that processes at least one function or any certain operation desired in a system, and is a combination of hardware or software or a combination of hardware and software. It can be implemented as a device or an assembly capable of performing independent operations or the like through means.

Terms such as top, bottom, top, bottom, or top, bottom, top, bottom, etc. are used for convenience to distinguish relative positions in each component. For example, the upper part of the drawing may be named and the lower part of the bottom.

In addition, terms such as first and second may be used to describe various components. That is, terms such as first and second may be used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as the second component without departing from the scope of the present invention, and the second component may also be referred to as the first component.

As shown in Figure 2 to 4, the sewage treatment car according to the present invention is largely a waste water tank 10, a stirring tank 20, a chemical input device 30, a dehydration tank 40, a fiber yarn filter 50, It comprises a wash water tank 60 and a high pressure washer (70).

First, the waste water tank 10 is provided to suck and temporarily store the sediment and waste water in the underground structure by the suction hose 12 by using the negative pressure of the vacuum pump 11.

That is, the waste water tank 10 has a vacuum inside the operation of the vacuum pump 11, so that the negative pressure is generated by the suction hose 12 to suck the sediment and waste water and various foreign substances in the underground structure at the same time. It is provided.

The agitation tank 20 receives the waste water of the waste water tank 10 by the pumping action of the transfer pump P1 and receives a predetermined amount of water purifier from the chemical input device 30 so as to form a floc. It is equipped.

That is, the stirring tank 20 is provided with a rapid stirring tank 21 for receiving a predetermined amount of water purification agent from the waste water and the chemical injector 30 from the waste water tank 10, as shown in Figures 6 to 8, The rapid stirring tank 21 is equipped with a rapid impeller 22 which rotates at a high speed by the driving force of the first electric motor 23 and mixes the waste water and the water purification agent.

And a slow stirring tank 24 for temporarily storing the waste water and the water purifier mixture which is transferred to the sedimentation phenomenon in the rapid stirring tank 21 with the quick stirring tank 21 and the partition wall therebetween is provided. The slow impeller 25 which rotates at low speed by the driving force of the 2nd electric motor 26 and forms a floc is provided in 24.

In addition, the agitation tank 20 may be further provided with an air nozzle 28 for supplying oxygen to the waste water to cause aeration.

That is, the air nozzle 28 receives compressed air from an air compressor 59 or the like which supplies compressed air at a high pneumatic pressure, or is forcibly supplied with an air pump to spray the waste water in the agitation tank 20. The sludge solidification can be achieved quickly as the water purification agent is mixed more effectively while increasing the oxygen, and it is also possible to efficiently separate excess harmful contaminants which are difficult to separate from the waste water.

Here, the first and second motors 23 and 26 obtain rotational power by converting electrical energy into mechanical energy, and are easily started (driven) and operated by a signal current from a controller or the like, and suitable for load. It is easy to select, a normal electric motor with little noise and vibration and no exhaust pollution can be adopted.

For example, it is possible to employ a servo motor which changes the voltage input according to the control signal of the controller to the rotation angle and quickly stops and reverses the operation, or a step motor that rotates at a predetermined angle in response to a pulse. It is also possible to employ a geared motor including a speed reducer to adjust the speed to output with the force required for driving.

The chemical injector 30 is provided so that a predetermined amount of the water purifier may be added on the stirring vessel 20.

That is, the chemical injector 30 is a device for temporarily storing the water purification agent and supplying the fixed amount to the stirring vessel 20 through a conveying means such as an electric screw conveyor or an electric belt conveyor. It is made to maintain the installation state firmly and stably by the fixed frame connected in the form.

Here, the chemical feeder 30 may employ a screw feeder structure for transporting the granular material coming from the hopper by the screw rotating in the cylindrical groove.

In addition, the drug injector 30 may be equipped with a valve for automatically adjusting the discharge of the water purifier according to a sensing signal such as weight measurement.

In addition, it is preferable to employ a water purification agent having both organic and inorganic coagulant properties and having a fast floc formation and a short settling time. For example, minerals such as calcium may be added to polyglutamic acid to apply PGα21Ca having a high crosslinking density and harmless to humans and the environment.

The dehydration tank 40 is equipped to remove the sediment or suspended matter and floc contained in the waste water moving in the action direction by the action of gravity or centrifugal force in the stirring tank 20.

That is, the support angle 41 is fixed to the inner circumference of the dewatering tank 40, and the overflow guide for overflowing the waste water and the floc on the upper portion of the slow stirring tank 24 on the wall between the slow stirring tank 24 ( 42) is installed.

And inside the dehydration tank 40, the sludge blanket 43 for filtering and removing the sludge cake by filtering the waste water transferred through the overflow guide 42 and adsorbing and dehydrating the floc, the upper portion of the support angle 41 It is built on top of it.

Further, a drain valve 44 for discharging the purified water filtered out through the sludge blanket 43 to the lower portion of the dewatering tank 40 is mounted.

Here, the dehydration tank 40 is preferably formed integrally side by side with the agitator 20 and the partition wall so that the waste water and the floc can be smoothly flow, but may be formed by combining and combining with each other.

That is, the size and shape of the agitation tank 20 and the dehydration tank 40 can be variously changed, and can be installed while accommodating the rapid impeller 22, slow impeller 25 and the sludge blanket 43 therein. It would be natural to be included in the technical scope of the present invention if possible.

In addition, the overflow guide 42 is slow agitated so that both sides of the overflow guide 42 can be folded as necessary to prevent contact interference when lifting and removing the sludge blanket 43 in the dewatering tank 40 using a crane or the like. It is preferable to connect to the partition wall with the tank 24 by hinged joints.

In addition, the upper part of the sludge blanket 43 placed on the support angle 41, that is, the rim of the agar part is firmly fixed by a metal frame, and the eye bolts can be easily and stably loaded and unloaded using cranes on all sides. And attaching a chain or shackle, such as a shackle, or a device used to tie a rope.

The fiber yarn filter 50 is provided to filter the waste water of the dehydration tank 40 by being supplied by the pumping action of the transfer pump P2.

That is, the fiber yarn filter 50 has a waste water inlet 52 and a backwash water outlet 53 formed at both circumferences as shown in FIGS. 9 and 10, and a connection for wastewater discharge and backwash water inflow at the upper portion thereof. The casing 51 in which the pipe 54 is formed is provided.

In the central portion of the casing 51 is provided so as to communicate with the connecting pipe 54, a plurality of voids are arranged around the periphery of the casing 51 is fitted with a strainer 55 to prevent the intrusion of various foreign substances and to accept only water.

In the casing 51, a plurality of fine fiber yarn bundles 56 are arranged around the outer periphery of the strainer 55.

That is, the fiber yarn bundle 56 is made into a narrow bundle form between the non-woven fiber yarns is pressed to a thickness of about 6 ~ 10cm on the surface of the porous strainer 55.

A floating port 57 is attached to the lower portion of the fiber bundle 56 in the casing 51, and blows compressed air under the floating port 57 to relax the fiber bundle 56 and increase the voids. The air supply pipe 58 is inserted into the buoyancy to increase, and the air compressor 59 for supplying compressed air at high pneumatic pressure is provided inside the floating port 57 through the air supply pipe 58.

That is, when a clogging phenomenon occurs in the fiber bundle 56, the compressed air is blown into the inside of the floating port 57 through the air supply pipe 58 as shown in FIG. 56) widen the gap, the air gap can be increased, and in this state, the backwash water is introduced at a high pressure through the connecting pipe 54 to reduce the fine sludge and the like, thereby increasing the filtration efficiency and extending the service life. have.

The wash water tank 60 is provided to store and receive some or all of the filtrate filter 50 by the pumping action of the transfer pump P2 to recycle the filtered water to the wash water.

Here, the wash water tank 60 may be installed side by side on both sides of the waste water tank 10.

The high pressure washer 70 is provided to discharge the washing water of the washing water tank 60 at a high pressure using the hydraulic pump 71.

That is, the high pressure washer 70 is provided with a nozzle gun 72 connected to the hose through the washing water tank 60 and the hydraulic pump 71 to spray the washing water, as shown in FIG. The suction pipe 73 is provided with a long length while being parallel with 72).

Here, the suction pipe 73 is connected to the hose through the waste water tank 10 and the vacuum pump 11 so as to suck the washing water and the waste water scattered by the high pressure injection action of the nozzle gun 72.

As described above, the sewage treatment car according to the present invention collects sediment and wastewater accumulated in the underground structure by vacuum suction, coagulates and dehydrates them, separates and removes the sludge cake, and then filters and discharges the sewage to the stream in a clean state. The wash water can be reused for breaking up, diluting or washing off the accumulated sediment.

11 and 12, the sewage treatment vehicle according to the present invention is provided with a support 80 that can be folded or unfolded on one side of the vehicle body (car chassis), and the support 80 has a small force on the manhole cover. A chain block 81 is mounted for lifting and lowering by pulling.

In particular, the support 80 is a first section steel 82 having a cross-sectional shape of a 'c' shape, a second section steel 84 that can be folded or unfolded as if overlapped with the first section steel 82, and a chain block ( The rail 86 with the rail 86 and the chain block 81 fixed to the upper surface of the first steel 82 so as to smoothly and stably slide along the longitudinal direction of the first steel 82. It comprises a slider 87 which moves along the position.

Here, one end portion in the longitudinal direction of the first shaped steel 82 is attached to one side of the vehicle body by a hinge H, and slot holes 83 are formed on both sides in the longitudinal direction.

And guides and guides so as to be folded or unfolded into the inner space of the first steel (82) while moving along the long hole (83) at one end in the longitudinal direction of the second steel (84) The guide pin 85 is attached.

In addition, the chain block 81 can quickly and easily change the position in the longitudinal direction of the first shaped steel 82.

That is, the support 80 guides the chain block 81 to reciprocate along its longitudinal direction within a predetermined range by the sliding motion of the rail 86 and the slider 87, and at the same time, the inertial force and the unloading force according to the transfer. It distributes the power of the back to support smooth and stable operation.

Here, the chain block 81 is composed of a gear reduction device, a winding tube (drum), etc., and rotates the winding cylinder with a reduction gear to wind a hoisting rope or chain, and a manhole cover with a hook or magnet mounted at the end thereof. It is possible to adopt a structure of lifting or attaching by lifting or by magnetic force.

In addition, the lengths of the first and second steels 82 and 84 can be freely folded or unfolded to stably support the chain block 81, and also to sufficiently move the chain block 81 to the upper part of the manhole cover. You can change it as far as possible.

As described above, the sewage treatment vehicle according to the present invention can lift and lower the manhole cover that closes the entrance and exit of the underground structure with a small force when using the support 80 and the chain block 81 to raise and lower the work efficiency and convenience. You can.

Here, among the components related to the sewage treatment difference according to the second embodiment of the present invention, the components having the same or similar effects as those of the first embodiment described above use the same reference numerals as those of the first embodiment described above, Detailed description will be omitted.

On the other hand, the present invention is not limited by the above-described embodiments and the accompanying drawings, and various modifications and applications that are not illustrated within the scope not departing from the technical spirit of the present invention, as well as of each component It is apparent to those skilled in the art that the present invention may be widely applied by changing to other embodiments equivalent to substitution.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included in the technical spirit and scope of the present invention.

10: wastewater tank 11: vacuum pump
20: stirring tank 21: rapid stirring bath
22: Rapid Impeller 23: First Motor
24: slow stirring 25: slow impeller
26: second motor 30: chemical injection
40: dehydration tank 41: support angle
42: Overflow Guide 43: Sludge Blanket
44: drain valve 50: fiber yarn strainer
51: casing 52: wastewater inlet
53: backwash water outlet 54: connector
55: strainer 56: fiber yarn bundle
57: floating port 58: air supply pipe
59: air compressor 60: wash water tank
70: high pressure cleaner 71: hydraulic pump
72: nozzle gun 73: suction line

Claims (7)

A waste water tank 10 which sucks sediment and waste water in the underground structure to the suction hose 12 by using the negative pressure of the vacuum pump 11; A stirring tank 20 for forming a floc by supplying the sediment and the waste water of the waste water tank 10 by the pumping action of the transfer pump and receiving the water purifier; A chemical injector 30 for introducing a predetermined amount of water purifier into the stirring tank 20; A dehydration tank 40 for removing suspended substances and flocs contained in waste water moving in the stirring vessel 20; At least one fiber yarn filter (50) for receiving and filtering waste water from the dehydration tank (40) by a pumping action of a transfer pump; At least one washing water tank (60) for receiving and storing water filtered out of the fiber filter (50) by the pumping action of a transfer pump; And a high pressure washer 70 for discharging the washing water of the washing water tank 60 at a high pressure by using a hydraulic pump 71;
The agitation tank 20 is supplied with wastewater from the wastewater tank 10 and a water purifier from the chemical injector 30, and the rapid impeller 22 rotates at high speed by the driving force of the first electric motor 23 for mixing. Stirring tank 21; And a slow stirring tank (24) in which the slow impeller (25) rotates at a low speed with the driving force of the second electric motor (26) to form flocs in the wastewater and water purification agent mixture transferred to the sedimentation phenomenon in the rapid stirring tank (21). Further comprises;
The dehydration tank 40, the support angle 41 mounted on the inner circumference; An overflow guide (42) installed on the wall between the slow stirring tank (24) and overflowing the waste water and the floc on the upper of the slow stirring tank (24); A sludge blanket (43) which is built with the upper part mounted on the support angle (41) and filters the waste water transferred through the overflow guide 42, and separates and removes the sludge cake by absorbing and dehydrating flocs; And a drain valve (44) for discharging the purified water filtered out through the sludge blanket (43).
delete delete delete delete The method of claim 1,
A support (80) is provided which can be folded or unfolded on one side of the vehicle body of the sewage treatment vehicle, and the support (80) is equipped with a chain block (81) for pulling up and down by pulling a manhole cover with a small force;
The support 80 has a cross-sectional shape of a 'c' shape, and one end of the longitudinal direction is attached to one side of the vehicle body by a hinge (H) joint, and a slot hole (83) on both sides along the longitudinal direction (83) (1) is formed first steel (82); A second section steel 84 which can be folded or unfolded as if overlapped with the first section steel 82 and equipped with a guide pin 85 at one end of the longitudinal direction so as to be movable along the long hole 83; A rail (86) fixed to an upper surface of the first steel (82) such that the chain block (81) slides along the longitudinal direction of the first steel (82); And a slider (87) moving along the rail (86) with the chain block (81) mounted thereon.
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