CN107309203B - Closed type cleaning box and self-cleaning method thereof - Google Patents

Abstract

The invention discloses a closed cleaning box and a self-cleaning method thereof, wherein the closed cleaning box comprises the following steps: the device comprises a cleaning box, a pressure balancing part, a steam part, a communication part, a circulating part and a plurality of valves; the balanced pressure component includes: the device comprises a U-shaped water sealing pipe, a U-shaped pipe water outlet, a pressure stabilizing communicating pipe, a water supplementing pipe and a flow limiting orifice plate; the steam part comprises a steam pipe and a steam heating silencer which are communicated in sequence; the communicating component comprises a first communicating interface, a communicating pipe and a spray pipe which are communicated in sequence; the circulating part comprises a circulating communicating pipe, a filter, a water pump, a flowmeter and an ejector which are sequentially communicated, and the ejector is communicated with the communicating pipe. The invention has novel structure and complete functions, utilizes the U-shaped water sealing pipe to balance pressure, carries out steam cleaning by the steam pipe, and carries out circulating cleaning by matching the communicating part with the circulating part, thereby obtaining high-efficiency cleaning effect.

Description

Closed type cleaning box and self-cleaning method thereof

Technical Field

The invention relates to the technical field of chemical cleaning equipment, in particular to a closed cleaning box.

Background

In the chemical production process, due to the particularity of chemical products, after the production work is finished, the working personnel need to regularly clean the chemical production equipment, so that the cleanness of the chemical production equipment is ensured, the service life of the chemical production equipment is further ensured, the safety of the equipment is ensured, the pollution to the surrounding environment is reduced, and a safe and excellent operation environment is provided for maintenance operators.

The cleaning device used in the chemical cleaning process is more, wherein a cleaning box is an essential main device, the traditional cleaning box is mostly in an open type, and the cleaning box is convenient for adding a cleaning agent and is convenient for checking the liquid level; however, the conventional cleaning tank has two disadvantages: firstly, when the circulation was washd, the case was washd in the poisonous and harmful substance entering of being among the cleaning equipment, and easy volatile materials very easily diffuses, causes all ring edge border ring and harm the site operation personnel healthy, and secondly the washing liquid splashes and constitutes the injury danger to wasing the operative employee.

Disclosure of Invention

The invention aims to provide a closed type cleaning box which is novel in structure and complete in function, pressure is balanced by using a U-shaped water sealing pipe, steam pipe cleaning is carried out, and a communicating part is matched with a circulating part for circulating cleaning, so that a high-efficiency cleaning effect is obtained.

The above object of the present invention is achieved by the following technical solutions.

A closed cleaning tank comprising: the device comprises a cleaning box, a pressure balancing part, a steam part, a communication part, a circulating part and a plurality of valves;

the balance pressure part includes: the cleaning device comprises a U-shaped water sealing pipe, a U-shaped pipe water outlet, a pressure stabilizing communicating pipe, a water replenishing pipe and a flow limiting orifice plate, wherein the U-shaped water sealing pipe is arranged inside a cleaning box, one end of the U-shaped water sealing pipe is arranged outside the cleaning box and is communicated with the U-shaped pipe water outlet through a valve, the other end of the U-shaped water sealing pipe is arranged inside the cleaning box and is sequentially communicated with the flow limiting orifice plate and the water replenishing pipe, the free end of the water replenishing pipe is positioned outside the cleaning box, one end of the pressure stabilizing communicating pipe extends into the cleaning box, the other end of the pressure stabilizing communicating pipe is communicated with the U-shaped pipe water outlet through the valve, and the valve is arranged between the flow limiting orifice plate and the water replenishing pipe;

the steam part comprises a steam pipe and a steam heating silencer which are sequentially communicated, the free end of the steam pipe is positioned outside the washing box, the inside of the washing box is positioned inside the washing box, and the steam pipe is provided with the valve;

the communicating part comprises a first communicating interface, a communicating pipe and a spraying pipe which are sequentially communicated, two valves are arranged on the part of the communicating pipe outside the cleaning box at intervals, and the spraying pipe is positioned inside the cleaning box;

the circulating part is including the circulation communicating pipe, filter, water pump, flowmeter, the ejector that communicate in proper order, the ejector with communicating pipe intercommunication, just the ejector with the intercommunication department of communicating pipe is located communicating two on pipe between the valve, be provided with second intercommunication interface on the ejector, the ejector with be provided with between the second intercommunication interface the valve, circulation communicating pipe passes through the valve with wash incasement portion intercommunication, the water pump be provided with between the flowmeter the valve.

The cleaning box is a main part for cleaning work and is used for containing objects to be cleaned and liquid required by cleaning; the pressure balancing component is used for balancing the hydraulic pressure inside the cleaning tank to be stable, under normal conditions, the pressure stabilizing work can be carried out by means of the U-shaped water sealing pipe, the U-shaped pipe water outlet and the pressure stabilizing communicating pipe, when the water level at one end of the U-shaped water sealing pipe inside the cleaning tank is low, a worker can add water to one end of the U-shaped water sealing pipe inside the cleaning tank through the water supplementing pipe, so that the pressure is increased, and the flow limiting orifice plate is used for limiting the flow so as to avoid excessive water adding; the steam pipe of the steam component is used for cleaning stains which are difficult to remove through steam, the steam heating silencer is used for reducing noise, the noise generated when the steam pipe works is prevented from influencing workers, and the valve on the steam pipe is used for controlling the steam component; the first communication interface, the communication pipe and the spray pipe of the communication part are used for adding liquid into the cleaning box so as to clean the cleaning box; the circulation communicating pipe of the circulating part is used for communicating with the inside of the cleaning box, the filter is used for filtering solid matters, the water pump is used for providing power for water circulation, the flowmeter is used for detecting the flow rate of liquid in the circulating part, and the ejector is used for connecting the circulating part with the communicating part on one hand and adding liquid materials on the other hand, so that a better cleaning effect is obtained; when the device is used, a worker can close the valve between the ejector and the second communication interface, close the valve on the communication pipe close to the first communication interface, open the valve on the communication pipe far away from the first communication interface, close the valves on the drain pipe and the three-way pipe, open the valves on one side of the filter, the water pump and the flow meter, form a closed loop by utilizing the inside of the cleaning box, the communication part and the circulating part, and then utilize the water pump to enable the liquid in the cleaning box, between the communication part and the circulating part to continuously circulate, so that the circulating cleaning work can be carried out; the steam pipe is used for steam cleaning, and the communicating part is matched with the circulating part for circulating cleaning, so that a high-efficiency cleaning effect is obtained.

Further, the washing tank further includes: a pollution discharge part;

the soil exhaust part includes: the cleaning device comprises a blow-off pipe and a three-way pipe, wherein the blow-off pipe is communicated with the inside of the cleaning box through the valve, the three-way pipe is respectively communicated with the blow-off pipe and the circulating communicating pipe, and the valve is arranged at the free end of the three-way pipe;

the staff can close or open suitable the valve as required to carry out the blowdown of dope or the process of discharge liquid, avoid wash incasement portion and cause the jam.

Specifically, a plurality of spray holes are formed in the spray pipe, and the length direction of the spray pipe is parallel to the bottom surface of the cleaning box;

when the working personnel add powder or liquid materials into the cleaning box, the liquid flowing out of the spray holes under the driving of the water pump can be utilized to accelerate the dissolution of the powder materials or the uniform mixing of the liquid materials in the cleaning box.

Specifically, the spray pipe comprises two spray hole strips which are arranged in parallel, the length direction of each spray hole strip is consistent with that of the spray pipe, and the central axes of the two spray hole strips are respectively vertical to two planes formed by the central axes of the spray pipe; the length direction of the spray pipe is parallel to the bottom surface of the cleaning box;

the spray hole strip consists of a plurality of rectangular spray nozzles which are arranged at intervals;

because the length direction of the spray pipe is parallel to the bottom surface of the cleaning box, and the length direction of the spray hole strips is consistent with that of the spray pipe, the respective central axes of the two spray hole strips are respectively vertical to two planes formed by the central axes of the spray pipe;

when the working personnel add powder or liquid materials into the cleaning box, the liquid flowing out of the spray hole strips under the driving of the water pump can be utilized to drive the original liquid in the cleaning box to continuously circulate, so that the dissolution of the powder or the uniform mixing of the liquid materials is accelerated.

Furthermore, a liquid level observation component is arranged on one side of the cleaning box;

the liquid level observation part is a liquid level meter, and specifically can adopt a magnetic turning plate liquid level meter, so that workers can clearly observe the liquid level of the cleaning box.

Further, a manhole is arranged on the top surface of the cleaning box;

the manhole is a hole with a cover, and a worker can enter and exit the inside of the cleaning box through the hole to clean and maintain the inside of the cleaning box.

Further, one side of the cleaning box is provided with a temperature measuring component;

the temperature measuring component is used for detecting the temperature inside the cleaning box, so that data basis is provided for workers to adjust the temperature inside the cleaning box.

Further, a pressure measuring component is arranged on the cleaning box;

the pressure measurement component is used for detecting the air pressure inside the cleaning box, so that data basis is provided for workers to adjust the air pressure inside the cleaning box.

Further, the lateral wall of wasing the case is provided with DN65 fire control joint, needs the team as the staff wash the inside liquid of case and excrete fast or when carrying out the fire control processing, usable DN65 fire control joint is connected with external equipment to excrete fast or the fire control processing work carries out.

Further, the self-cleaning method of the closed cleaning box comprises the following steps:

s1: closing all communication parts of the cleaning box which are communicated with the outside;

s2: opening the valve on the communicating pipe, opening the valve between the circulating communicating pipe and the filter, and opening the valve between the water pump and the flowmeter;

s3: ensuring that the valve on the first communication port is in a closed state;

s4: starting the water pump to carry out circulating cleaning;

s5: and after the cleaning of the cleaning box is confirmed to be finished, discharging the waste water.

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

1. the steam pipe is used for steam cleaning, and the communicating part is matched with the circulating part for circulating cleaning, so that a high-efficiency cleaning effect is obtained.

2. The manhole provided by the invention is convenient for workers to directly observe the internal condition of the cleaning tank, and can directly enter the cleaning tank through the manhole to operate when needed.

Drawings

Fig. 1 is a schematic structural view of a closed cleaning tank according to embodiment 1.

Fig. 2 is a schematic structural view of the nozzle according to embodiment 2.

Fig. 3 is a schematic structural view of the nozzle according to embodiment 3.

Fig. 4 is a schematic view of the internal structure of the nozzle according to embodiment 3.

Fig. 5 is a block flow diagram of a self-cleaning method of a closed cleaning tank according to embodiment 4.

In the figure: 1. a cleaning tank; 101. a liquid level observing member; 102. a manhole; 103. a temperature measuring part; 104. a pressure measurement component; 105. DN65 fire joint; 2. a pressure balancing component; 201. a U-shaped water sealing pipe; 202. a U-shaped pipe water outlet; 203. a voltage stabilizing communicating pipe; 204. a water replenishing pipe; 205. a restriction orifice plate; 3. a steam component; 301. a steam pipe; 302. a steam heating muffler; 4. a communication member; 401. a first communication interface; 402. a communicating pipe; 403. a nozzle; 4031. spraying a hole; 404. spraying a hole strip; 4041. a rectangular spout; 5. a circulating part; 501. a circulating communicating pipe; 502. a filter; 503. a water pump; 504. a flow meter; 505. an ejector; 6. a valve; 7. a pollution discharge part; 701. a sewage discharge pipe; 702. a three-way pipe.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable 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 creation of the present invention can be understood in specific cases by those of ordinary skill in the art.

The invention is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Example 1

As shown in fig. 1, a hermetic cleaning tank includes: a cleaning box 1, a balance pressure part 2, a steam part 3, a communication part 4, a circulating part 5 and a plurality of valves 6; the balance pressure member 2 includes: the cleaning device comprises a U-shaped water sealing pipe 201, a U-shaped pipe water outlet 202, a pressure stabilizing communicating pipe 203, a water replenishing pipe 204 and a flow limiting pore plate 205, wherein the U-shaped water sealing pipe 201 is arranged inside a cleaning box 1, one end of the U-shaped water sealing pipe 201 is arranged outside the cleaning box 1 and is communicated with the U-shaped pipe water outlet 202 through a valve 6, the other end of the U-shaped water sealing pipe is arranged inside the cleaning box 1 and is sequentially communicated with the flow limiting pore plate 205 and the water replenishing pipe 204, the free end of the water replenishing pipe 204 is positioned outside the cleaning box 1, one end of the pressure stabilizing communicating pipe 203 extends into the cleaning box 1, the other end of the pressure stabilizing communicating pipe 203 is communicated with the U-shaped pipe water outlet 202 through the valve 6, and the valve 6 is arranged between the flow limiting pore plate 205 and the water replenishing pipe 204; the steam part 3 comprises a steam pipe 301 and a steam heating silencer 302 which are sequentially communicated, the free end of the steam pipe 301 is positioned outside the washing tank 1, the inside of the washing tank 1 is positioned inside the washing tank 1, and a valve 6 is arranged on the steam pipe 301; the communicating component 4 comprises a first communicating interface 401, a communicating pipe 402 and a spray pipe 403 which are sequentially communicated, two valves 6 are arranged on the part of the communicating pipe 402 outside the cleaning tank 1 at intervals, and the spray pipe 403 is positioned inside the cleaning tank 1; the circulating part 5 comprises a circulating communicating pipe 501, a filter 502, a water pump 503, a flow meter 504 and an ejector 505 which are sequentially communicated, the ejector 505 is communicated with the communicating pipe 402, the communicating part of the ejector 505 and the communicating pipe 402 is positioned between two valves 6 on the communicating pipe 402, a second communicating interface 506 is arranged on the ejector 505, the valve 6 is arranged between the ejector 505 and the second communicating interface 506, the circulating communicating pipe 501 is communicated with the inside of the cleaning tank 1 through the valve 6, and the valve 6 is arranged between the water pump 503 and the flow meter 504.

The cleaning box 1 in the invention is a main part for cleaning work and is used for containing objects to be cleaned and liquid required by cleaning; the balance pressure component 2 is used for balancing the hydraulic pressure inside the cleaning tank 1 to be stable, under normal conditions, the pressure stabilizing work can be performed by means of the U-shaped water sealing pipe 201, the U-shaped pipe water outlet 202 and the pressure stabilizing communicating pipe 203, when the water level at one end, located inside the cleaning tank 1, of the U-shaped water sealing pipe 201 is low, a worker can add water to one end, located inside the cleaning tank 1, of the U-shaped water sealing pipe 201 through the water supplementing pipe 204, so that the pressure is increased, and the flow limiting pore plate 205 is used for limiting the flow and avoiding excessive water adding; the steam pipe 301 of the steam component 3 is used for cleaning stains which are difficult to remove through steam, the steam heating silencer 302 is used for reducing noise, the noise generated when the steam pipe 301 works is prevented from affecting workers, and the valve 6 on the steam pipe 301 is used for controlling the steam component 3; the first communication interface 401, the communication pipe 402 and the nozzle 403 of the communication part 4 are used for adding liquid into the cleaning tank 1 for cleaning; a circulation communicating pipe 501 of the circulating part 5 is used for communicating with the inside of the cleaning tank 1, a filter 502 is used for filtering solid matters, a water pump 503 is used for providing power for water circulation, a flow meter 504 is used for detecting the liquid flow rate in the circulating part 5, and a jet device 505 is used for connecting the circulating part 5 with the communicating part 4 on one hand and adding liquid materials on the other hand, so that a better cleaning effect is obtained; when the circulating cleaning device is used, a worker can close the valve 6 between the ejector 505 and the second communicating connector 506, close the valve 6 on the communicating pipe 402 close to the first communicating connector 401, open the valve 6 on the communicating pipe 402 far away from the first communicating connector 401, close the valves 6 on the sewage drain pipe 701 and the three-way pipe 702, open the valve 6 on one side of the filter 502, the valve 6 between the water pump 503 and the flowmeter 504, form a closed loop by utilizing the inside of the cleaning tank 1, the communicating part 4 and the circulating part 5, and continuously circulate liquid among the inside of the cleaning tank 1, the communicating part 4 and the circulating part 5 by utilizing the water pump 503, so that the circulating cleaning work can be carried out; the steam cleaning device is novel in structure and complete in function, pressure is balanced by the U-shaped water sealing pipe 201, the steam pipe 301 is used for steam cleaning, and the communicating part 4 is matched with the circulating part 5 for circulating cleaning, so that a high-efficiency cleaning effect is achieved.

In this embodiment, the present invention further includes: a soil discharge part 7; the soil exhaust member 7 includes: the cleaning device comprises a sewage draining pipe 701 and a three-way pipe 702, wherein the sewage draining pipe 701 is communicated with the inside of the cleaning box 1 through a valve 6, the three-way pipe 702 is respectively communicated with the sewage draining pipe 701 and the circulating communicating pipe 501, and the valve 6 is arranged at the free end of the three-way pipe 702;

the staff can close or open suitable valve 6 as required to carry out the blowdown of dope or the process of discharge liquid, avoid wasing case 1 inside and cause the jam.

In this embodiment, a liquid level observation unit 101 is provided on one side of the cleaning tank 1; the liquid level observation part 101 is a liquid level meter, and specifically, a magnetic turning plate liquid level meter can be adopted, so that the liquid level of the cleaning tank 1 can be observed more clearly by workers.

In this embodiment, a manhole 102 is provided on the top surface of the cleaning tank 1; the manhole 102 is a hole with a cover, and a worker can get in and out of the cleaning tank 1 through the hole to clean and maintain the inside of the cleaning tank 1.

In this embodiment, a temperature measuring part 103 is provided on one side of the cleaning tank 1; the temperature measuring part 103 is used for detecting the temperature inside the cleaning tank 1, thereby providing a data basis for the staff to adjust the temperature inside the cleaning tank 1.

In this embodiment, the cleaning tank 1 is provided with a pressure measuring part 104; the pressure measuring part 104 is used for detecting the air pressure inside the cleaning tank 1, thereby providing data basis for the staff to adjust the air pressure inside the cleaning tank 1.

In this embodiment, wash the lateral wall of case 1 and be provided with DN65 fire control joint 105, when the staff needs the team to wash the inside liquid of case 1 and excrete fast or carry out the fire control and handle, usable DN65 fire control joint 105 is connected with external equipment to excrete fast or the fire control is handled the work.

Example 2

As shown in fig. 2, the present embodiment provides a closed type cleaning tank, which is different from embodiment 1 in that a plurality of spray holes 4031 are provided on a spray pipe 403, and a length direction of the spray pipe 403 is parallel to a bottom surface of the cleaning tank 1;

when the staff adds powder or liquid materials into the cleaning box 1, the liquid flowing out of the spray holes 4031 under the driving of the water pump 503 can be used for accelerating the dissolution of the powder or the uniform mixing of the liquid materials in the cleaning box 1.

Example 3

As shown in fig. 3 and 4, this embodiment provides a closed cleaning tank, which is different from embodiments 1 and 2 in that the spray pipe 403 includes two parallel spray nozzle strips 404, the length direction of the spray nozzle strips 404 is the same as the length direction of the spray pipe 403, and the central axes of the two spray nozzle strips 404 are perpendicular to two planes formed by the central axes of the spray pipe 403; the length direction of the spray pipe 403 is parallel to the bottom surface of the cleaning tank 1; the nozzle strip 404 is composed of a plurality of rectangular nozzles 4041 arranged at intervals;

because the length direction of the spray pipe 403 is parallel to the bottom surface of the cleaning tank 1, and the length direction of the spray hole strips 404 is consistent with that of the spray pipe 403, the respective central axes of the two spray hole strips 404 are respectively vertical to two planes formed by the central axes of the spray pipe 403;

when the staff through to washing case 1 inside when adding powder or liquid material, can utilize under the drive of water pump 503 to drive from the liquid that orifice strip 404 flows at washing case 1 and drive the inside original liquid of washing case 1 and constantly circulate for the homogeneous mixing of the dissolution of powder or liquid material.

Example 4

As shown in fig. 5, the present embodiment provides a self-cleaning method for a sealed cleaning tank described in embodiment 1, 2 or 3, including the steps of:

s1: closing all communication parts of the washing tank 1 communicating with the outside;

s2: opening a valve 6 on the communicating pipe 402, opening a valve 6 between the circulating communicating pipe 501 and the filter 502, and opening a valve 6 between the water pump 503 and the flow meter 504;

s3: ensuring that the valve 6 on the first communication port 401 is in a closed state;

s4: starting a water pump 503 for circular cleaning;

s5: after the cleaning of the cleaning box 1 is confirmed to be finished, the waste water is discharged;

this embodiment utilizes washing case 1, spray tube 403, communicating pipe 402, ejector 505, flowmeter 504, water pump 503, filter 502, circulation communicating pipe 501 to communicate in proper order, forms a closed return circuit to utilize the power of water pump 503 self to drive the water in the washing case 1, accomplish the scouring action, and then reach self-cleaning's effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the technical solutions of the inventive embodiments of the present invention.

Claims (8)

1. A closed cleaning tank, characterized in that said cleaning tank comprises: the device comprises a cleaning box, a pressure balancing part, a steam part, a communication part, a circulating part and a plurality of valves;

the balance pressure part includes: the cleaning device comprises a U-shaped water sealing pipe, a U-shaped pipe water outlet, a pressure stabilizing communicating pipe, a water replenishing pipe and a flow limiting orifice plate, wherein the U-shaped water sealing pipe is arranged inside a cleaning box, one end of the U-shaped water sealing pipe is arranged outside the cleaning box and is communicated with the U-shaped pipe water outlet through a valve, the other end of the U-shaped water sealing pipe is arranged inside the cleaning box and is sequentially communicated with the flow limiting orifice plate and the water replenishing pipe, the free end of the water replenishing pipe is positioned outside the cleaning box, one end of the pressure stabilizing communicating pipe extends into the cleaning box, the other end of the pressure stabilizing communicating pipe is communicated with the U-shaped pipe water outlet through the valve, and the valve is arranged between the flow limiting orifice plate and the water replenishing pipe;

the steam part comprises a steam pipe and a steam heating silencer which are sequentially communicated, the free end of the steam pipe is positioned outside the washing box, the inside of the washing box is positioned inside the washing box, and the steam pipe is provided with the valve;

the communicating part comprises a first communicating interface, a communicating pipe and a spraying pipe which are sequentially communicated, two valves are arranged on the part of the communicating pipe outside the cleaning box at intervals, and the spraying pipe is positioned inside the cleaning box;

the circulating component comprises a circulating communicating pipe, a filter, a water pump, a flowmeter and an ejector which are sequentially communicated, the ejector is communicated with the communicating pipe, the communication position of the ejector and the communicating pipe is positioned between two valves on the communicating pipe, a second communication interface is arranged on the ejector, the valve is arranged between the ejector and the second communication interface, the circulating communicating pipe is communicated with the inside of the cleaning box through the valve, and the valve is arranged between the water pump and the flowmeter;

the sewage discharge part comprises a sewage discharge pipe and a three-way pipe, the sewage discharge pipe is communicated with the inside of the cleaning box through the valve, the three-way pipe is respectively communicated with the sewage discharge pipe and the circulating communicating pipe, and the valve is arranged at the free end of the three-way pipe;

the spraying pipe is provided with a plurality of spraying holes, and the length direction of the spraying pipe is parallel to the bottom surface of the cleaning box.

2. The hermetic cleaning tank as claimed in claim 1, wherein the nozzle tube comprises two parallel nozzle strips, the length direction of the nozzle strips is the same as the length direction of the nozzle tube, and the central axes of the two nozzle strips are perpendicular to two planes formed by the central axis of the nozzle tube; the length direction of the spray pipe is parallel to the bottom surface of the cleaning box.

3. A hermetic cleaning tank as in claim 2, wherein the nozzle strip is composed of a plurality of rectangular nozzles arranged at intervals.

4. A closed washing tank as in claim 1, characterized in that one side of the washing tank is provided with a liquid level observing part.

5. A closed cleaning tank as claimed in claim 1, characterized in that the top surface of the tank is provided with a manhole.

6. A closed washing tank as in claim 1, characterized in that one side of the washing tank is provided with a temperature measuring part.

7. A hermetic washing tank as in claim 1, characterized in that it is provided with pressure measuring means.

8. A self-cleaning method for a closed cleaning tank, characterized in that the self-cleaning method for a closed cleaning tank according to claim 1 or 2 comprises the steps of:

s1: closing all communication parts of the cleaning box which are communicated with the outside;

s2: opening the valve on the communicating pipe, opening the valve between the circulating communicating pipe and the filter, and opening the valve between the water pump and the flowmeter;

s3: ensuring that the valve on the first communication port is in a closed state;

s4: starting the water pump for circular cleaning;

s5: and after the cleaning of the cleaning box is confirmed to be finished, discharging the waste water.

Images