CN218196064U

CN218196064U - Automatic washing unit of hopper under commercial concrete mixer ash unloading

Info

Publication number: CN218196064U
Application number: CN202221864633.3U
Authority: CN
Inventors: 罗强; 王虽新; 王晓东; 周志明; 李刚; 马建军
Original assignee: Lanzhou Qilianshan Cement Concrete Co ltd
Current assignee: Lanzhou Qilianshan Cement Concrete Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2023-01-03
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to an automatic washing unit of hopper under commercial concrete mixer ash unloading, including flushing pipe, external connection pipe, washer pump, water tank and washer pump control system, wherein: the flushing pipeline is arranged at the top of the inner side wall of the discharging hopper in a surrounding manner and is connected with the water tank through an external connecting pipe, and a plurality of nozzles are arranged on the flushing pipeline at intervals; the flushing pump is arranged on the external connecting pipe, and a motor of the flushing pump is connected with a main power supply live wire through a contact terminal of the contactor; a control system of a flushing pump comprises a manual/automatic switching knob switch, a starting button, a stopping button, a PLC, an intermediate relay coil, an intermediate relay contact, a contactor coil and a concrete outlet door limit switch. The device provided by the utility model, can reduce the waste material of piling up of hopper down, and degree of automation is high, cleaning efficiency is high, the clearance waste material is effectual, has guaranteed the play machine quality of concrete and has ensured production high efficiency and continuity, has improved production facility's production efficiency.

Description

Automatic washing unit of hopper under commercial concrete mixer ash unloading

Technical Field

The utility model relates to a commercial concrete production technical field especially relates to an automatic washing unit of hopper under commercial concrete mixer ash unloading.

Background

The concrete is artificial stone which is prepared by taking cement as a main cementing material, mixing water, sand, stones, chemical additives and mineral admixtures as necessary, mixing the materials according to a proper proportion, uniformly stirring, compacting, forming, curing and hardening. When concrete is produced, a plurality of materials need to be mixed by a corresponding stirrer. When the concrete mixture is stirred and discharged, the concrete freely falls down to impact a discharging opening of the discharging hopper, and if the concrete mixture is not cleaned in time, a small part of the concrete mixture splashes on the inner side wall of the discharging hopper, so that bonding accumulation is easily formed, and unnecessary waste is caused; the accumulated waste material can affect the blanking speed, and the blanking port can be blocked if the waste material is not cleaned for a long time; piling up all around when the waste material hopper still can make the mixer go out the unable normal switch of concrete door, cause the hourglass thick liquid problem, thereby it influences the performance and the quality of concrete to lead to each component of concrete stirring inhomogeneous.

According to investigation, most enterprises in the field of commercial concrete production industry all over the country at present adopt a mode of regular manual cleaning to clean the concrete waste accumulated on the inner side wall of the discharging hopper, but the manual cleaning efficiency is low, in order to ensure that the inner side wall of the discharging hopper cannot form adhesive accumulation, an operator needs to frequently enter the discharging hopper to clean the inner side wall, the physical labor intensity of the operator is increased, and potential safety hazards exist; although a small part of enterprises are additionally provided with a flushing pump or a mechanical cleaning device, the automatic flushing cannot be realized because a control system is not connected, and the automation degree is not high.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that exists among the prior art, the utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading.

The utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading, including flushing pipe, external connection pipe, washer pump, water tank and washer pump control system, wherein:

the flushing pipeline is arranged at the top of the inner side wall of the blanking hopper in a surrounding manner and is connected with the water tank through an external connecting pipe, and a plurality of nozzles are arranged on the flushing pipeline at intervals; the flushing pump is arranged on the external connecting pipe, and a motor of the flushing pump is connected with a main power supply live wire through a contactor contact;

the control system of the flushing pump comprises a manual/automatic switching knob switch, a starting button, a stopping button, a PLC (programmable logic controller), an intermediate relay coil, an intermediate relay contact, a contactor coil and a concrete outlet door limit switch;

one end of the contact of the intermediate relay is connected with a main power supply live wire, and the other end of the contact of the intermediate relay is connected with a main power supply zero line through a contactor coil;

the concrete outlet door limit switch, the manual/automatic switching knob switch, the starting button and the stopping button are connected with the input end of the PLC, and the intermediate relay coil is connected with the output end of the PLC.

Furthermore, the control system of the flushing pump also comprises a control power supply knob switch which is connected between the contact of the intermediate relay and the main power supply in series.

Furthermore, the control system of the flushing pump also comprises an indicator light and an indicator light, the indicator light is connected in parallel with a branch formed after the intermediate relay contact and the contactor coil are connected in series, one end of the indicator light is connected with a main power live wire through a control power knob switch, and the other end of the indicator light is connected with a main power zero line.

Furthermore, the PLC is in communication connection with an upper computer, so that on-off control over an intermediate relay contact is achieved through an intermediate relay coil according to instructions of the upper computer.

Furthermore, one end of the intermediate relay coil is connected with the output end of the PLC, and the other end of the intermediate relay coil is connected with a main power supply zero line; and one end of the concrete outlet door limit switch, the manual/automatic switching knob switch, the starting button and the stopping button is respectively connected with one input end of the PLC, and the other end of the concrete outlet door limit switch, the manual/automatic switching knob switch, the starting button and the stopping button is connected with a GND terminal of the PLC.

Furthermore, the nozzle is a stainless steel universal fan-shaped nozzle.

Furthermore, the device also comprises a water valve which is arranged on the external connecting pipe and is positioned between the washing pump and the water tank.

Further, the control system of the flushing pump further comprises a thermal relay, the thermal relay comprises a thermal relay main contact and a thermal relay normally closed contact, one end of the thermal relay main contact is connected with a contactor coil, the other end of the thermal relay main contact is connected with a main power zero line, and the thermal relay normally closed contact is connected between a flushing pump motor and a contactor contact in series.

Furthermore, go out concrete door limit switch and include out concrete door opening switch and go out concrete door closing switch.

The utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading has following beneficial effect at least:

(1) Utilize the utility model provides an automatic washing unit of hopper under merchant's concrete mixer ash discharge can in time clear up the accumulational waste material of hopper down, has solved because of the accumulational waste material of hopper makes the mixer go out the hourglass thick liquid problem that the unable normal switch of concrete door caused under the mixer, and then has avoided having guaranteed the play machine quality of concrete because of the inhomogeneous performance and the quality that influence the concrete of each component stirring of concrete.

(2) The utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading has increased the flushing pump control system, utilizes the PLC controller can realize manual control and the automatic control of flushing pump. In the actual use process, when the waste materials at the feed opening are accumulated due to the failure of the stirrer, the accumulated materials can be cleaned in time in a manual mode; when the mixer normally produced, utilize automatic mode, after every car concrete loading was accomplished, detect out the concrete door and close, control the flush pump promptly and start, realize full self-cleaning. The utility model provides an automatic flushing device simple and practical easy operation, cleaning efficiency are higher, degree of automation is higher, and has guaranteed the washing effect, can effectively reduce the waste material of piling up of hopper down. Furthermore, because the utility model provides an automatic flushing device can replace artifical realization to the clearance of hopper down, consequently in commercial concrete production process, uses the utility model provides an automatic flushing device can reduce the number of times of personnel's clearance hopper down, has ensured production high efficiency and continuity, has improved production facility's production efficiency, has also guaranteed the safe and healthy of operation personnel simultaneously.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an automatic flushing device for an ash discharge hopper of a blender according to an embodiment of the present invention;

fig. 2 is a control schematic diagram of a flush pump control system according to an embodiment of the present invention;

fig. 3 is a schematic top view of the discharging hopper in the embodiment of the present invention;

fig. 4 is a schematic view of a control box panel in an embodiment of the present invention;

fig. 5 is a PLC control ladder diagram in an embodiment of the present invention;

1-flushing pipeline, 2-external connecting pipe, 3-flushing pump, 4-water tank, 5-nozzle, S01-manual/automatic switching knob switch, S02-control power knob switch, SB 2-starting button, SB 3-stopping button, KA 1-intermediate relay, KM 1-contactor, SQ 1-concrete outlet door closing switch and SQ 2-concrete outlet door opening switch.

Detailed Description

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

In an embodiment of the present invention, as shown in fig. 1-3, there is provided an automatic flushing device for ash discharge hopper of commercial concrete mixer, comprising a flushing pipe 1, an external connecting pipe 2, a flushing pump 3, a water tank 4 and a flushing pump control system, wherein: the flushing pipe 1 is arranged on the top of the inner side wall of the lower hopper in a surrounding mode and is connected with the water tank 4 through the external connecting pipe 2, and a plurality of nozzles 5 are arranged on the flushing pipe 1 at intervals. And the flushing pump 3 is arranged on the external connecting pipe 2, and the motor of the flushing pump is connected with a main power live wire through a contact of the contactor. In this embodiment, the operation of the motor of the flush pump is controlled by the flush pump control system, thereby realizing the control of the flushing of the nozzle.

Specifically, the flushing pipe can adopt 1 cun galvanized pipe fitting, when the installation, utilizes 50 angle steel 5 to do the support, and is fixed with the pipe strap, and the distance of mounted position and the feed opening position of hopper down can set up to 1050mm. Preferably, the flushing pump can be selected to have the power of 3kw, the head of 44m and the flow rate of 5.9m ³ In the high-lift low-flow pipeline pump, on one hand, the high-lift flushing pump has higher pressure during working, and high-pressure water sprayed by the nozzles can completely cover and flush the walls of the four inner side walls of the discharge opening and the whole discharge hopper, so that thorough cleaning is ensured; on the other hand, select for use foretell high-lift, low flow's tubing pump, can reduce the washing water consumption when guaranteeing the washing effect, make automatic flushing device can be ignored to the influence of concrete strength. The actual water consumption of the single-side concrete can influence the water-cement ratio of the concrete, so that the strength of the concrete is influenced. Consider to increase on merchant concrete mixer the utility model provides an automatic washing unit after, nozzle spun water can make the concrete actual water consumption increase when automatic washing (actual water consumption = predetermine ratio water consumption + automatic water consumption that washes), chooses for use the tubing pump of the high lift of the aforesaid mentioning, low discharge, through calculating, when the washout time is 5 seconds, theoretical water consumption is 8.19kgIs spread evenly at 12m ³ In the concrete, the actual water consumption of each formula is only increased by 0.7kg, and the influence on the strength of the concrete is negligible. Furthermore, in order to reduce the influence on the quality of the concrete caused by the flushing feed opening to the maximum extent, when an operator manages the production mix proportion, the preset proportion water consumption of the single-side concrete can be properly reduced, so that the actual water consumption of the single-side concrete flushed by the automatic flushing device is basically consistent with the actual water consumption when the automatic flushing device is not added, the water-cement ratio of the concrete is not influenced, and the adverse influence on the quality of the produced concrete is avoided.

When installing nozzle 5, the delivery port of nozzle 5 is down, can make during the installation nozzle erection joint parallel with a hopper lateral wall that the nozzle corresponds, and the nozzle can be chooseed for use from the nozzle of taking 60 inclination, and when the nozzle was from the nozzle of taking 60 inclination, the spun water under high pressure of nozzle and its hopper lateral wall that corresponds formed 120 contained angles, and spun water under high pressure becomes umbelliform fan-shaped to can guarantee to wash the area, realize better washing effect. More specifically, can use tee bend, elbow and loose joint etc. can dismantle the pipe fittings of change and connect between washing pipeline and the outside connecting pipe, between washing pipeline and the nozzle to make the later stage change easy maintenance.

The control system of the flushing pump comprises a manual/automatic switching knob switch S01, a starting button SB2, a stopping button SB3, a PLC (programmable logic controller), an intermediate relay KA1 coil, an intermediate relay KA1 contact, a contactor KM1 coil and a concrete outlet door limit switch. As shown in fig. 4, a manual/automatic switching knob switch S01, a start button SB2, and a stop button SB3 are provided on a console box panel at the work site.

One end of a contact of the intermediate relay KA1 is connected with a main power supply live wire, and the other end of the contact of the intermediate relay KA1 is connected with a main power supply zero line through a coil of a contactor KM 1; the concrete outlet door limit switch, the manual/automatic switching knob switch S01, the starting button SB2 and the stopping button SB3 are connected with the input end of the PLC, and the coil of the intermediate relay KA1 is connected with the output end of the PLC. Specifically, one end of a coil of the intermediate relay KA1 is connected with an output end Y0 of the PLC, and the other end of the coil of the intermediate relay KA1 is connected with a main power supply zero line; go out concrete door limit switch, manual/automatic switch knob switch S01, start button SB2, stop button SB3 one end and be connected with an input of PLC controller respectively, the other end is connected with the GND terminal of PLC controller. More specifically, it includes concrete door opening switch SQ2 and concrete door closing switch SQ1 to go out concrete door limit switch. As shown in fig. 2, the manual/automatic switching knob switch S01 is connected to an input terminal X0 of the PLC controller, the start button SB2 is connected to an input terminal X1 of the PLC, the stop button SB3 is connected to an input terminal X2 of the PLC, the concrete outlet door opening switch SQ2 is connected to an input terminal X4 of the PLC, and the concrete outlet door closing switch SQ1 is connected to an input terminal X3 of the PLC.

The manual/automatic switching knob switch S01 is used to switch between a manual mode and an automatic mode.

When the mode is switched to the manual mode (that is, S01 shown in fig. 2 is disconnected), an operator can press a start button SB2, so that the PLC controller controls the coil of the intermediate relay KA1 to be powered on, the contact of the intermediate relay KA1 is closed, the coil of the contactor KM1 is powered on, the contact of the contactor KM1 is closed, and the washing pump motor is powered on and switched on, so that the nozzle 5 washes the inner side wall of the discharging hopper; if wash and finish, the operating personnel can press stop button SB3 for PLC controller control auxiliary relay KA1 coil outage, the disconnection of auxiliary relay KA1 contact, the outage of contactor KM1 coil, the disconnection of contactor KM1 contact, the outage of washer pump motor is closed, thereby lets nozzle 5 stop to wash the inside wall of hopper down, accomplishes the cleanness of hopper inside wall down.

When switching to automatic mode (also be that S01 shown in figure 2 switches on), because the last dish of material of each car is beaten the back, the mixer goes out the concrete door and closes, it will be closed to go out concrete door closing switch SQ1 this moment, it will break off to go out concrete door opening switch SQ2, PLC controller detects out concrete door closing switch SQ 1' S the turn-on signal, then control makes auxiliary relay KA1 coil electrified, auxiliary relay KA1 contact closure, make contactor KM1 coil electrified, contactor KM1 contact closure, the circular telegram of washer pump motor is opened, thereby let nozzle 5 wash the inside wall of hopper down. Furthermore, under automatic mode, can set up the washing time and be 10s, the washing time can be adjusted by the host computer that technical staff utilized and be connected with the PLC controller, and when the washing time arrived, the PLC controller control washing pump automatic shutdown. It should be understood that manual operation (pressing the start button or stop button) is not effective in the automatic mode.

In this embodiment, by providing the flush pump control system, the manual control and the automatic control of the flush pump can be realized by using the PLC controller. In the actual use process, the manual mode and the automatic mode are switched through the manual/automatic switching knob switch, so that the manual/automatic switching knob switch is convenient for operators to use, when the material accumulation at the feed opening is caused by the failure of the stirring machine, the operator does not need to wait for reaching the set flushing condition (the concrete outlet door is closed), can directly clear the accumulated material in the manual mode and flush the feeding hopper in time; when the mixer normally produces, utilize automatic mode to clear up, the last dish of material of every car is beaten (the loading of every car concrete is accomplished the back), the PLC controller realizes the automatic control of washing pump motor opening through detecting out the concrete door closure signal when the mixer goes out the concrete door and closes to after reaching the flush time of settlement, realize the automatic control of closing the washing pump motor, and then realize the automatic control of nozzle washing, degree of automation is higher. Because under the condition that the stirrer normally produces, the last dish of each car is beaten, all carries out self-cleaning, and high pressure water cleaning frequency is high, so the feed opening is difficult for forming long-pending material.

The utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading can reduce hopper number of times under piling up waste material and the personnel's clearance of hopper down, and degree of automation is high, cleaning efficiency is high, the clearance waste material is effectual, has guaranteed the play machine quality of concrete and has ensured production efficiency and continuity, has improved production facility production efficiency.

The utility model discloses a in still another embodiment, the PLC controller is connected with the host computer communication to according to host computer instruction, realize the on-off control to the auxiliary relay KA1 contact through auxiliary relay KA1 coil. In this embodiment, the flush pump control system adds a third mode of operation-a supervisory manual mode of operation. The setting of the upper computer manual operation mode is performed in an automatic mode, namely the upper computer manual operation mode, and is realized when the manual/automatic switching knob S01 is switched on, and the upper computer has no operation permission in the manual mode. Further, when the manual/automatic switching knob S01 is switched on, the upper computer sends an instruction to the PLC, and the washing pump motor can be directly driven to start and stop, so that the remote control of the upper computer can be realized.

In combination with the above embodiment, the utility model provides an automatic washing unit of hopper has three kinds of mode under commercial concrete mixer ash unloading: manual mode, automatic mode, host computer manual operation mode, for the convenience of the skilled person in the art to understand the utility model provides a control flow of washer pump in hopper automatic flushing device under commercial concrete mixer ash unloading, the following combines fig. 5 (PLC ladder diagram) to carry out further explanation to the control flow of washer pump under the three kinds of working modes (manual mode, automatic mode, host computer manual operation mode) mentioned in the above-mentioned embodiment. The operator can select the corresponding working mode (default: automatic mode) through a manual/automatic switching knob switch S01 on the panel of the control box.

1. Manual mode: in a manual mode (a channel 0.02/a knob switch S01 is not conducted), an operator can directly control the starting of the washing pump by using a starting button SB2 on a control box panel of a working site and can directly control the stopping of the washing pump by using a stopping button SB3, when a PLC (programmable logic controller) detects a channel 0.00 rising edge signal, the stopping button SB3 (the channel 0.01) is not pressed down, a manual starting washing pump mark (the channel W0.00) is conducted, then the washing pump (the channel 100.00) starts to work, and when the stopping button SB3 (the channel 0.01 is conducted) is pressed down, the washing pump stops working. In addition, the upper computer has no operation authority in the manual mode.

2. Automatic mode: under the automatic mode, manual/automatic switch knob switch S01 switches on, and every car material is last one to beat the back, and the mixer goes out the concrete door and closes, and PLC detects out concrete door closing switch SQ 1' S the signal that switches on (passageway W0.04) and switches on, and flushing pump KA1 (relay and contactor) switches on simultaneously, and the flushing pump automatic work, and flushing time (D2) can adjust through the host computer, the utility model discloses do not do the restriction to this, preferred sets up acquiescence flushing time and is 10 seconds.

3. The manual operation mode of the upper computer is as follows: in the automatic mode, the manual/automatic switching knob switch S01 is turned on, and the upper computer directly sends an instruction to the PLC to directly drive the start (register D0= 2) and stop (register D0= 3) of the flush pump. When the register D0=2, the channel W0.01 is turned on, and the flush pump starts to operate, and when the register D0=3, the channel W0.02 is turned on, and the channel W0.03 is turned off, and the flush pump stops operating. In the automatic mode, the manual operation by the operator via the start button SB2 and the stop button SB3 is disabled.

In another embodiment of the present invention, as shown in fig. 2, the control system of the washing pump further includes a thermal relay, the thermal relay includes a main contact of the thermal relay and a normally closed contact of the thermal relay, one end of the main contact of the thermal relay is connected to the coil of the contactor KM1, the other end of the main contact of the thermal relay is connected to the zero line of the main power, and the normally closed contact of the thermal relay is connected in series between the motor of the washing pump and the contact of the contactor KM 1.

In another embodiment of the present invention, as shown in fig. 2, the flushing pump control system further includes a control power knob switch S02, and the control power knob switch S02 is connected in series between the contact of the intermediate relay KA1 and the main power source.

Specifically, control power knob switch S02 also sets up on the control box panel of job site, and under any circumstance, when control power knob switch was closed (disconnection), the flush pump motor stopped work immediately to make things convenient for the operating personnel can directly to close the flush pump motor through control power knob switch under emergency.

In another embodiment of the utility model, the control system of the flushing pump further comprises an indicator light, and the branch road that forms after establishing ties with auxiliary relay KA1 contact and contactor KM1 coil is parallelly connected, and one end is passed through control power knob switch and is connected with the main power live wire, and the other end is connected with the main power zero line. The indicator light can prompt the operator whether the current control power is on.

In yet another embodiment of the present invention, the nozzle is a stainless steel universal fan nozzle. The spray angle of the nozzle can be adjusted. Furthermore, in order to increase the washing effect and reduce the water consumption, the nozzle with the aperture of 3mm is selected. Further, in one implementation, 14 nozzles may be provided, with a spacing of 500mm between adjacent nozzles, depending on the actual size of the discharge hopper.

In a further embodiment of the invention, the device further comprises a water valve 6, the water valve 6 being arranged on the external connection pipe 2 and being located between the washer pump 3 and the water tank 4.

The present invention has been further described above with reference to specific embodiments, but it should be understood that the specific description herein should not be read as limiting the spirit and scope of the invention. Various modifications of the above-described embodiments, which would occur to persons skilled in the art upon reading this description, are within the scope of the invention.

Claims

1. The utility model provides an automatic washing unit of hopper under commercial concrete mixer ash unloading which characterized in that, including wash pipe, external connection pipe, flush pump, water tank and flush pump control system, wherein:

the flushing pipeline is arranged on the top of the inner side wall of the discharging hopper in a surrounding mode and is connected with the water tank through the external connecting pipe, and a plurality of nozzles are arranged on the flushing pipeline at intervals; the flushing pump is arranged on the external connecting pipe, and a motor of the flushing pump is connected with a main power supply live wire through a contactor contact;

the flushing pump control system comprises a manual/automatic switching knob switch, a starting button, a stopping button, a PLC (programmable logic controller), an intermediate relay coil, an intermediate relay contact, a contactor coil and a concrete outlet door limit switch;

one end of the contact of the intermediate relay is connected with the live wire of the main power supply, and the other end of the contact of the intermediate relay is connected with the zero line of the main power supply through the coil of the contactor;

the concrete outlet door limiting switch, the manual/automatic switching knob switch, the starting button and the stopping button are connected with the input end of the PLC, and the intermediate relay coil is connected with the output end of the PLC.

2. The automatic flushing device for the ash discharging and discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein the flushing pump control system further comprises a control power supply knob switch, and the control power supply knob switch is connected in series between the contact of the intermediate relay and the main power supply.

3. The automatic washing unit of hopper under unloading of merchant concrete mixer of claim 2, characterized in that, the flushing pump control system still includes the pilot lamp, with the branch road that forms after the auxiliary relay KA1 contact and contactor coil establish ties is parallelly connected, one end through control power knob switch with main power live wire is connected, the other end with main power zero line is connected.

4. The automatic flushing device for the ash discharging and discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein the PLC is in communication connection with an upper computer so as to realize on-off control of an intermediate relay contact through an intermediate relay coil according to the instruction of the upper computer.

5. The automatic flushing device for the ash discharging and discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein one end of the coil of the intermediate relay is connected with the output end of the PLC controller, and the other end of the coil of the intermediate relay is connected with the zero line of the main power supply; go out concrete door limit switch, manual/automatic switch knob switch, start button, stop button one end respectively with an input of PLC controller is connected, the other end with the GND terminal of PLC controller is connected.

6. The automatic flushing device for the ash discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein the nozzle is a stainless steel universal fan nozzle.

7. The automatic flushing device for the ash discharge hopper of the commercial concrete mixer as claimed in claim 1, wherein said device further comprises a water valve, said water valve is disposed on said external connection pipe and is located between said flushing pump and said water tank.

8. The automatic flushing device of the ash discharging and discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein the flushing pump control system further comprises a thermal relay, the thermal relay comprises a thermal relay main contact and a thermal relay normally closed contact, one end of the thermal relay main contact is connected with the contactor coil, the other end of the thermal relay main contact is connected with the main power zero line, and the thermal relay normally closed contact is connected in series between the flushing pump motor and the contactor contact.

9. The automatic flushing device for the ash discharging and discharging hopper of the commercial concrete mixer as claimed in claim 1, wherein the concrete outlet door limit switch comprises a concrete outlet door opening switch and a concrete outlet door closing switch.