CN114292002A - Environment-friendly sewage treatment plant uses sludge treatment equipment - Google Patents

Abstract

The invention provides an environment-friendly sludge treatment device for a sewage treatment plant. The environment-friendly sewage treatment plant uses sludge treatment equipment includes: a body; the centrifugal structure is arranged in the machine body and comprises a centrifugal drum for centrifugally dewatering sludge and a sealing assembly for sealing one side of the centrifugal drum. The invention provides environment-friendly sludge treatment equipment for a sewage treatment plant, which is mainly used for sealing the outer side of a centrifugal roller by arranging a sealing component on the outer side of the centrifugal roller, and simultaneously can realize the automatic cleaning function of automatically cleaning sludge in the centrifugal roller.

Description

An environmentally friendly sewage treatment plant with sludge treatment equipment

technical field

The invention relates to the field of sludge treatment, in particular to an environment-friendly sludge treatment device for a sewage treatment plant.

Background technique

Sludge is the solid precipitation material produced by the water and sewage treatment process, and sludge treatment is the reduction, stabilization and harmlessness of sludge by concentration, conditioning, dehydration, stabilization, drying or incineration. In the process of processing, the higher the degree of sewage treatment, the more sludge residues will be generated that need to be treated. For modern sewage treatment plants, sludge treatment and disposal has become the most complicated and costly operation of sewage treatment systems. a part of.

In the process of sludge treatment, special sludge treatment equipment is required. When dewatering sludge, sludge centrifugal dewatering equipment is generally used. The water in the mud is quickly thrown out, thereby realizing the rapid dehydration function.

In the related art, in the process of sludge centrifugal dewatering equipment, after each batch of sludge dewatering operation is completed, the sludge dehydrated from the inside of the centrifugal drum needs to be taken out, and due to the lack of sludge cleaning in the centrifugal drum. The mechanism relies on manual cleaning. During the cleaning process, the sealing cover needs to be opened first, and then the cleaning tool is used to clean the sludge outward. The entire cleaning process is time-consuming and laborious, inconvenient, and the workload is large and the cleaning speed is high. Slow, if the sludge treatment volume is large, frequent manual cleaning will easily cause physical fatigue, which will gradually slow down the work speed.

Therefore, it is necessary to provide an environmentally friendly sewage treatment plant sludge treatment equipment to solve the above technical problems.

SUMMARY OF THE INVENTION

The invention provides an environment-friendly sludge treatment equipment for a sewage treatment plant, which solves the problems of time-consuming, labor-intensive and inconvenient to manually clean the sludge.

In order to solve the above-mentioned technical problems, the environment-friendly sewage treatment plant sludge treatment equipment provided by the present invention includes:

body;

Centrifugal structure, the centrifugal structure is arranged inside the body, and the centrifugal structure includes a centrifugal drum for centrifugal dewatering of sludge, a sealing component for sealing one side of the centrifugal drum, and a centrifugal drum for driving the a drive assembly for rotating the centrifugal drum inside the body, and a pulley block for providing stable support for the outside of the centrifugal drum;

Wherein, the sealing assembly includes an outer sealing cover and a telescopic assembly for driving the outer sealing cover to move in the horizontal direction, the telescopic end of the telescopic assembly is fixedly installed with the outer side of the outer sealing cover, and the outer sealing cover Installed on the outer side of the body, the inner side of the outer sealing cover is rotatably connected with a sealing connector, one side of the sealing connector is closely attached to one side of the centrifugal drum, and one side of the sealing connector is in close contact with the centrifugal drum. A cleaning member for cleaning the sludge inside the centrifugal drum to the outside is fixedly installed on the side.

Preferably, the centrifugal drum is horizontally arranged inside the body, the pulley set is composed of four pulleys, and the four pulleys are respectively located on the left and right sides of the top and bottom of the inner wall of the body, and all the pulleys are The outside of the pulley is in rolling connection with the chute outside the centrifugal drum.

Preferably, the drive assembly includes a drive motor and a rotating member, the drive motor is installed on one side of the body, the rotating member is fixedly installed on the outer side of the centrifugal drum, and the output end of the drive motor is connected to the Drive wheels are fixedly installed on the outside of the rotating parts, and the outside of the two drive wheels are connected by a drive belt.

Preferably, the outer side of the outer sealing cover is provided with an introduction pipe connected to the sludge introduction pipe, the cleaning member includes a cleaning plate and two connecting rods, the cleaning plate is attached to the inner side of the centrifugal drum, Two of the connecting rods are located between the opposite sides of the cleaning plate and the sealing connector.

Preferably, a treatment liquid storage tank is arranged on the outer side of the body, one side of the treatment liquid storage tank is connected to a cylinder input pipeline, a control valve is arranged on the input pipeline, and one end of the input pipeline is connected to the rotating member turn the connection on one side.

Preferably, a mud guide hopper is fixedly installed on one side of the body and below the outer sealing cover, and a collection truck for collecting sludge is provided on one side of the body and just below the mud guide hopper.

Preferably, the telescopic assembly is provided with an electric telescopic rod, and the telescopic assembly is horizontally installed on the top of the body.

Preferably, one side of the outer sealing cover is provided with an introduction structure, the introduction structure includes a mixing cylinder, one side of the mixing cylinder is fixedly installed with one side of the outer sealing cover, and the inner side of the mixing cylinder is installed There are screw turns.

Preferably, a sludge pipeline connection head is fixedly installed on the outer side of the mixing drum, and a control valve for controlling the sludge flow rate is arranged on the sludge pipeline connection head.

Preferably, an elastic connecting pipe is installed between the mixing cylinder and the treatment liquid storage tank, and one end of the elastic connecting pipe connecting with the treatment liquid storage tank is a retractable elastic part, and the elastic connecting pipe is on the elastic part. Set the control valve used to control the flow of the treatment fluid.

Compared with the related art, the environment-friendly sewage treatment plant sludge treatment equipment provided by the present invention has the following beneficial effects:

The invention provides a sludge treatment equipment for an environment-friendly sewage treatment plant. By arranging a sealing component on the outer side of the centrifugal drum, it is mainly used for sealing the outer side of the centrifugal drum, and at the same time, automatic cleaning of the sludge inside the centrifugal drum can be realized. Function, after the sludge dewatering is completed, it is extended through the telescopic component, and finally the cleaning part can move horizontally outwards inside the centrifugal drum, and then the sludge flows outwards to the inside of the collecting vehicle, completing the automatic cleaning of the sludge, changing the Manual manual cleaning operation is adopted, which makes the sludge cleaning operation more convenient, labor-saving and faster;

By using the outer sealing cover in conjunction with the cleaning element, the cleaning element can automatically clean the sludge while the outer sealing cover is opened, thereby realizing a one-step operation in place, further shortening the cleaning time, and improving work efficiency.

Description of drawings

1 is a schematic structural diagram of the first embodiment of the sludge treatment equipment for an environment-friendly sewage treatment plant provided by the present invention;

Fig. 2 is the structural representation inside the body shown in Fig. 1;

3 is a schematic structural diagram of the outside of the centrifugal structure shown in FIG. 1;

Fig. 4 is the exploded schematic diagram of the centrifugal structure shown in Fig. 3;

5 is a schematic structural diagram of the back of the housing shown in FIG. 1;

Fig. 6 is the enlarged schematic diagram of A part shown in Fig. 1;

7 is a schematic structural diagram of the second embodiment of the sludge treatment equipment for an environmentally friendly sewage treatment plant provided by the present invention;

FIG. 8 is a schematic diagram of the structure outside the import structure shown in FIG. 7

FIG. 9 is a schematic view of the internal structure of the mixing drum shown in FIG. 8 .

Labels in the figure

1. The body;

2. Centrifugal structure;

21. Centrifugal drum, 22, Seal assembly, 23, Drive assembly, 24, Pulley block;

221, outer sealing cover, 222, telescopic assembly, 223, sealing connector, 224, cleaning part;

231, drive motor, 232, rotating parts, 233, transmission wheel;

3. Treatment liquid storage tank, 4. Input pipeline;

5. Guide mud bucket, 6. Collecting vehicle;

61, body, 62, connecting shaft;

7. Import structure;

71. Mixing cylinder, 72, Spiral rotating piece, 73, Connector, 74, Elastic connecting pipe;

8. Connecting plate, 9. Connecting groove.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

first embodiment

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, wherein, Fig. 1 is a schematic structural diagram of the first embodiment of the sludge treatment equipment for an environmentally friendly sewage treatment plant provided by the present invention; Fig. 2 1 is a schematic diagram of the structure inside the body shown in FIG. 1; FIG. 3 is a schematic structural diagram of the outside of the centrifugal structure shown in FIG. 1; FIG. 4 is an exploded schematic diagram of the centrifugal structure shown in FIG. 3; Schematic diagram of the structure of the back of the body; FIG. 6 is an enlarged schematic diagram of part A shown in FIG. 1 . Sludge treatment equipment for environmentally friendly sewage treatment plants, including:

body 1;

Centrifugal structure 2, the centrifugal structure 2 is arranged inside the body 1, the centrifugal structure 2 includes a centrifugal drum 21 for centrifugal dewatering of sludge, and the centrifugal drum 21 is horizontally arranged inside the body 1 , by connecting with the drive assembly 23, it can rotate in the horizontal direction inside the body 1, and the outside of the centrifugal drum 21 is evenly provided with water outlet holes for discharging the water in the sludge;

A sealing assembly 22 for sealing one side of the centrifugal drum 21, the sealing assembly 22 includes an outer sealing cover 221 and a telescopic assembly 222 for driving the outer sealing cover 221 to move in a horizontal direction. The telescopic end of 222 is fixedly installed with the outer side of the outer sealing cover 221. The outer sealing cover 221 is installed on the outer side of the body 1. The outer sealing cover 221 is used for sealing and clamping the opening on the outer side of the body 1. The telescopic assembly 222 is connected. When the telescopic assembly 222 expands and contracts, it can drive the outer sealing cover 221 to close or open the body 1 at the same time. The telescopic assembly 222 is an electric telescopic rod, which is externally connected with a power supply, and its expansion and contraction is controlled by an external switch. For other horizontally retractable components, a sealing connector 223 is rotatably connected to the inner side of the outer sealing cover 221, and one side of the sealing connector 223 is closely attached to one side of the centrifugal drum 21. 21 and one side of the sealing connector 223 are provided with a sealing ring, so that when the sealing connector 223 is closely connected with the centrifugal drum 21, the sealing between the two is ensured, and the sewage is prevented from flowing out, and the two are tightly attached to the card. Then, when the centrifugal drum 21 rotates, the sealing connector 223 can be driven to rotate, and the sealing connector 223 can also be supported on the outside of the centrifugal drum 21 when the centrifugal drum 21 rotates, so that it is more stable when rotating. One side is fixedly installed with a cleaning member 224 for cleaning the sludge inside the centrifugal drum 21 to the outside, the outer side of the outer sealing cover 221 is provided with an introduction pipe connected to the sludge introduction pipe, and the cleaning member 224 includes A cleaning plate and two connecting rods, the cleaning plate is attached to the inner side of the centrifugal drum 21, the two connecting rods are located between the cleaning plate and the opposite side of the sealing connector 223, the cleaning plate It is a circular plate that fits with the inner diameter of the centrifugal drum 21 and can be closely attached to the inner wall of the centrifugal drum 21. When cleaning the sludge inside the centrifugal drum 21, the sealing connector 223 is driven to move by the outer sealing cover 221, Then, the cleaning member 224 can be moved horizontally inside the centrifugal drum 21, and the sludge accumulated on the inner wall of the centrifugal drum 21 is pushed outward at one time, thereby realizing the automatic cleaning of the sludge while the outer sealing cover 221 is opened. Makes cleaning more convenient and less hassle;

A drive assembly 23 for driving the centrifugal drum 21 to rotate inside the body 1, the drive assembly 23 includes a drive motor 231 and a rotating member 232, the drive motor 231 is installed on one side of the body 1, and drives The motor 231 is externally connected with a power supply, and its operation is controlled by an external controller, which is mainly used to drive the two transmission wheels 233 to rotate, thereby enabling the rotating member 232 to rotate. The rotating member 232 is fixedly installed on the outside of the centrifugal drum 21, while The rotating member 232 is a metal cylinder, one end of which extends to the interior of the centrifugal drum 21, and the other end thereof is rotatably connected to the input pipe, and is kept in communication, so that the treatment liquid in the treatment liquid storage tank 3 can enter the centrifugal drum 21, and pass through. The treatment liquid is mixed with the sludge for preliminary treatment. The output end of the drive motor 231 and the outside of the rotating member 232 are fixedly installed with a transmission wheel 233, and the outer parts of the two transmission wheels 233 pass through Belt drive connection.

The pulley block 24 is used to provide stable support for the outside of the centrifugal drum 21. The pulley block 24 is composed of four pulleys. The left and right sides outside the centrifugal drum 21 are provided with chutes adapted to the pulleys. Four pulleys can effectively limit the centrifugal drum 21, so that it can stably rotate inside the body 1, and the four pulleys are located on the left and right sides of the top and bottom of the inner wall of the body 1, respectively, And the outside of the pulley is in rolling connection with the chute outside the centrifugal drum 21;

The outer side of the body 1 is provided with a treatment liquid storage tank 3, one side of the treatment liquid storage tank 3 is connected to a cylinder input pipe 4, a control valve is arranged on the input pipe 4, and one end of the input pipe 4 is connected to the One side of the rotating member 232 is rotatably connected, and the inside of the treatment liquid storage tank 3 is stored as treatment liquid for preliminary treatment of the sludge.

A mud guide hopper 5 is fixedly installed on one side of the body 1 and below the outer sealing cover 221 . , so that it can enter into the collection vehicle 6, a collection vehicle 6 for collecting sludge is provided on one side of the body 1 and located directly under the mud guide bucket 5, and the collection vehicle 6 includes a collection vehicle body. 61, the left and right sides of the front end of the vehicle body 61 are fixedly installed with connecting shafts 62, both sides of the collection vehicle body 61 are provided with rolling wheels, and the two sides of the body 1 are fixedly installed with connecting shafts 62. A connecting groove 9 is formed on one side of the connecting plate 8, the front end of the collecting vehicle body 61 is located between the two connecting plates 8, and the outside of the two connecting shafts 62 are respectively connected with the two connecting plates 8. The inside of the slot 9 is clamped, and the connecting slot 9 is designed in an L shape. When the front end of the collecting car body 61 is connected and fixed to the outside of the body 1, the collecting car body 61 needs to be rotated first, so that the connecting shaft 62 on the outside is kept with the connecting slot 9. Align, and then directly push the collecting car body 61, so that the connecting shaft 62 can be snapped into the connecting groove 9 until the connecting shaft 62 moves to the inside thereof, and then release the collecting car body 61 to rotate under the action of gravity, thereby making the The connecting shaft 62 moves to the position below the connecting groove 9 and engages with the inside thereof to complete the quick installation and fixation of the collecting vehicle body 61. When the collecting vehicle body 61 is released from fixing, it is only necessary to rotate the collecting vehicle body 61 upward to make the connecting shaft 62 Move upward, and no longer remain in the state of being clamped with the connecting groove 9, the collecting car body 61 can be pulled outward to complete the separation of the two. The collecting car 6 can be quickly installed and disassembled from the outside of the body 1, which greatly saves installation It can be set in the form of a cart, after the sludge is full, the collection cart 6 can be directly pushed to move to the next processing position, so as to realize the rapid transfer of the sludge and make the sludge transfer easier and more convenient Also more labor-saving.

The working principle of the sludge treatment equipment for the environment-friendly sewage treatment plant provided by the present invention is as follows:

During use, the sludge to be dewatered is transported to the interior of the centrifugal drum 21 by connecting the conveying pump with the connecting head outside the outer sealing cover 221, and the centrifugal structure 21 is activated at the same time, and the two transmission wheels are rotated by the driving motor 231. 233 rotate at the same time, so that the rotating member 232 can drive the centrifugal drum 21 to rotate, and at the same time, the valve on the input pipeline 4 is opened, and the treatment liquid in the treatment liquid storage tank 3 is transported to the interior of the centrifugal drum 21. The sludge is mixed with the treatment liquid, and the sludge is preliminarily treated by the treatment liquid, and the sewage in the sludge can be quickly dehydrated and thrown out through the rotation of the centrifugal drum 21, and the thrown sewage flows out through the discharge pipeline inside the body 1;

After the dehydration is completed, the internal sludge cleaning of the centrifugal drum 21 starts, and the telescopic assembly 222 is activated to make it start to stretch, thereby driving the outer sealing cover 221 to separate from the outer side of the body 1, and at the same time, the sealing connector 223 drives the cleaning member 224. It moves horizontally on the inner side of the centrifugal drum 21, thereby pushing the sludge inside the centrifugal drum 21 to move outward until the telescopic assembly 222 is stretched to the maximum state, so that the cleaning member 224 just moves to the outer side of the centrifugal drum 21 to remove the sludge. All are cleaned out, and the sludge is introduced into the collecting vehicle 6 through the sludge guide hopper 5 to complete the cleaning operation of the sludge. After the cleaning is completed, it is shortened by the telescopic assembly 222, so that the outer sealing cover 221 is reset.

Compared with the related art, the environment-friendly sewage treatment plant sludge treatment equipment provided by the present invention has the following beneficial effects:

The sealing component 22 is provided on the outside of the centrifugal drum 21, which is mainly used for sealing the outside of the centrifugal drum 21, and at the same time, the automatic cleaning function of the sludge inside the centrifugal drum 21 can be realized. 222 is elongated, so that the cleaning member 224 can move horizontally outward in the centrifugal drum 21, and then the sludge flows outward to the inside of the collecting vehicle 6 to complete the automatic cleaning of the sludge. The mud cleaning operation is more convenient, labor-saving and faster;

By using the outer sealing cover 221 in conjunction with the cleaning member 224, the cleaning member 224 can automatically clean the sludge while the outer sealing cover 221 is opened, thereby realizing a one-step operation in place, further shortening the cleaning time, and providing work efficiency.

Second Embodiment

Please refer to FIGS. 7-9 , based on the first embodiment of the present invention, an environmentally friendly sewage treatment plant sludge treatment equipment, the second embodiment of the present invention provides another environmentally friendly sewage treatment plant sludge treatment equipment , wherein the second embodiment does not prevent the independent implementation of the technical solutions of the first embodiment.

Specifically, the present invention provides another kind of environment-friendly sewage treatment plant sludge treatment equipment that is different in that:

One side of the outer sealing cover 221 is provided with an introduction structure 7, the introduction structure 7 includes a mixing cylinder 71, one side of the mixing cylinder 71 is fixedly installed with one side of the outer sealing cover 221, and the mixing cylinder 71 is fixedly installed. The inside of 71 is installed with a screw rotating member 72, and the outer side of the mixing drum 71 is fixedly installed with a sludge pipeline connection head 73. The sludge pipeline connection head 73 is provided with a control valve for controlling the flow of sludge. An elastic connection pipe 74 is installed between the cylinder 71 and the treatment liquid storage tank 3 , and the end of the elastic connection pipe 74 connected with the treatment liquid storage tank 3 is a retractable elastic part, and the elastic connection pipe 74 is on the Set the control valve used to control the flow of the treatment fluid.

The introduction structure 7 is connected to the treatment liquid storage tank 3 and the outer sealing cover 221, so that the treatment liquid can be transported to the inside of the centrifugal drum 21. The mixing drum 71 is the position for sludge sewage and treatment and mixing, and the screw rotating member 72 is a conventional When the mixture of treatment liquid and sewage sludge passes through the screw rotating member 72, it can drive the screw rotating member 72 to rotate at the same time, and under the rotating action of the screw rotating member 72, the mixing of the treatment liquid and sewage sludge can be realized. Pre-mixing is carried out so that the two can be fully contacted, so that the treatment liquid can better play its role. The connecting head 73 is connected with the pipeline of the feeding pump, and the sludge and sewage mixture can be transported to the inside of the mixing cylinder 71. The introduction Structure 7 changes the original introduction method of treatment liquid and sludge sewage. By centrally introducing the two into the mixing drum 71 , the generated flow force can drive the rotating screw 72 to rotate, thereby achieving effective mixing of the two at the same time.

The above descriptions are only embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. The utility model provides an environment-friendly is sludge treatment equipment for sewage treatment plant which characterized in that includes:

a body (1);

the centrifugal structure (2) is arranged inside the machine body (1), and the centrifugal structure (2) comprises a centrifugal drum (21) for centrifugally dewatering sludge, a sealing assembly (22) for sealing one side of the centrifugal drum (21), a driving assembly (23) for driving the centrifugal drum (21) to rotate inside the machine body (1), and a pulley block (24) for providing stable support for the outside of the centrifugal drum (21);

the sealing assembly (22) comprises an outer side sealing cover (221) and a telescopic assembly (222) used for driving the outer side sealing cover (221) to move in the horizontal direction, the telescopic end of the telescopic assembly (222) is fixedly mounted on the outer side of the outer side sealing cover (221), the outer side sealing cover (221) is mounted on the outer side of the machine body (1), a sealing connecting piece (223) is rotatably connected to the inner side of the outer side sealing cover (221), one side of the sealing connecting piece (223) is tightly attached to one side of the centrifugal roller (21), and a cleaning piece (224) used for cleaning sludge inside the centrifugal roller (21) outwards is fixedly mounted on one side of the sealing connecting piece (223).

2. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 1, wherein the centrifugal roller (21) is horizontally arranged inside the machine body (1), the pulley block (24) is composed of four pulleys, the four pulleys are respectively arranged on the left side and the right side of the top and the bottom of the inner wall of the machine body (1), and the outer part of the pulley is in rolling connection with a sliding groove on the outer part of the centrifugal roller (21).

3. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 1, wherein the driving assembly (23) comprises a driving motor (231) and a rotating member (232), the driving motor (231) is installed at one side of the machine body (1), the rotating member (232) is fixedly installed at the outer side of the centrifugal drum (21), the output end of the driving motor (231) and the outer part of the rotating member (232) are both fixedly installed with a driving wheel (233), and the outer parts of the two driving wheels (233) are connected through a transmission belt.

4. The environment-friendly sludge treatment equipment for sewage treatment plants as recited in claim 1 wherein the outside of said outside sealing cover (221) is provided with an inlet pipe connected with a sludge inlet pipe, said cleaning member (224) comprises a cleaning plate and two connecting rods, said cleaning plate is attached to the inside of said centrifugal drum (21), and said two connecting rods are located between the cleaning plate and the side opposite to said sealing connecting member (223).

5. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 3, wherein a treatment liquid storage tank (3) is arranged outside the machine body (1), one side of the treatment liquid storage tank (3) is connected with a cylinder input pipeline (4), a control valve is arranged on the input pipeline (4), and one end of the input pipeline (4) is rotatably connected with one side of the rotating member (232).

6. The environment-friendly sludge treatment equipment for sewage treatment plants as claimed in claim 1, wherein a sludge guide hopper (5) is fixedly installed at one side of the machine body (1) and below the outer sealing cover (221), and a collecting vehicle (6) for collecting sludge is arranged at one side of the machine body (1) and right below the sludge guide hopper (5).

7. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 1, wherein the telescopic assembly (222) is provided with an electric telescopic rod, and the telescopic assembly (222) is horizontally installed on the top of the machine body (1).

8. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 5, wherein one side of the outer sealing cover (221) is provided with a leading-in structure (7), the leading-in structure (7) comprises a mixing cylinder (71), one side of the mixing cylinder (71) is fixedly installed with one side of the outer sealing cover (221), and a spiral rotating piece (72) is installed inside the mixing cylinder (71).

9. The environment-friendly sludge treatment equipment for sewage treatment plants as claimed in claim 8, wherein a sludge pipeline connector (73) is fixedly installed at the outer side of the mixing drum (71), and a control valve for controlling the flow of sludge is arranged on the sludge pipeline connector (73).

10. The environment-friendly sludge treatment equipment for sewage treatment plants according to claim 9, wherein an elastic connecting pipe (74) is installed between the mixing drum (71) and the treatment liquid storage tank (3), one end of the elastic connecting pipe (74) connected with the treatment liquid storage tank (3) is a telescopic elastic part, and a control valve for controlling the flow of the treatment liquid is arranged on the elastic connecting pipe (74).

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