阅读说明：本技术 一种用于输送筛网的清洗装置 (Cleaning device for conveying screen ) 是由 郭达吉 郭嘉懿 于 2021-10-12 设计创作，主要内容包括：本发明公开了一种用于输送筛网的清洗装置,涉及筛网清洗技术领域,包括：空气喷嘴模块,所述空气喷嘴模块能够喷吹压缩空气,对输送筛网进行反向吹扫；方向调节机构,所述方向调节机构与所述空气喷嘴模块连接,所述方向调节机构能够调节所述空气喷嘴模块的吹气方向；压差传感器,所述压差传感器能够检测所述输送筛网的两侧压力；控制单元,所述压差传感器、所述空气喷嘴模块以及所述方向调节机构均与所述控制单元连接。本发明能够实现对输送筛网的自动清洗,从而能够排除堵塞,提高筛网过滤效率。(The invention discloses a cleaning device for conveying a screen, which relates to the technical field of screen cleaning and comprises the following components: the air nozzle module can spray compressed air to reversely blow the conveying screen; the direction adjusting mechanism is connected with the air nozzle module and can adjust the blowing direction of the air nozzle module; a differential pressure sensor capable of detecting a pressure on both sides of the conveying screen; and the pressure difference sensor, the air nozzle module and the direction adjusting mechanism are all connected with the control unit. The automatic cleaning device can automatically clean the conveying screen, thereby removing blockage and improving the filtering efficiency of the screen.)

1. A belt cleaning device for conveying screen cloth, characterized in that: the method comprises the following steps:

the air nozzle module can spray compressed air to reversely blow the conveying screen;

the direction adjusting mechanism is connected with the air nozzle module and can adjust the blowing direction of the air nozzle module;

a differential pressure sensor capable of detecting a pressure on both sides of the conveying screen;

and the pressure difference sensor, the air nozzle module and the direction adjusting mechanism are all connected with the control unit.

2. A cleaning device for a conveying screen according to claim 1, characterised in that: the air nozzle module comprises a sweeping air knife, the sweeping air knife comprises an air knife high-pressure cavity, an air inlet is formed in the air knife high-pressure cavity and connected with an air source through an air inlet pipe, and a control valve is arranged on the air inlet pipe and connected with the control unit; and the air knife high-pressure cavity is also provided with an air seam which is communicated with the air knife high-pressure cavity.

3. A cleaning device for a conveying screen according to claim 2, characterised in that: the thickness of the air gap is 0.03-0.10 mm.

4. A cleaning device for a conveying screen according to any one of claims 1 to 3, characterised in that: the direction adjusting mechanism comprises an adjusting support, the air nozzle module is rotatably connected with the adjusting support through a rotating shaft, the rotating shaft is connected with a driving motor, and the driving motor can drive the air nozzle module to swing left and right.

5. A cleaning device for a conveying screen according to claim 1, characterised in that: still include the rivers nozzle module, the rivers nozzle module is close to the air nozzle module sets up, the rivers nozzle module includes a plurality of rivers nozzles that set up side by side, the rivers nozzle is connected with the inlet tube, it has the high-pressure pump to advance water piping connection, the high-pressure pump with the control unit is connected.

6. A cleaning device for a conveying screen according to claim 5, characterised in that: the high pressure pump employs a pulse pump that enables the water jet nozzles to back flush the delivery screen in a pulsed manner.

7. A cleaning device for a conveying screen according to claim 6, characterised in that: and a plurality of groups of air nozzle modules and water flow nozzle modules are uniformly distributed.

8. A cleaning device for a conveying screen according to claim 1, characterised in that: the conveying screen is an enclosed screen, an inner cavity is defined by the conveying screen, a negative pressure cavity is arranged in the inner cavity, and the negative pressure cavity is connected with a negative pressure generating box; the upper end opening of the negative pressure cavity is opposite to the lower surface of the upper section of the conveying screen, and the lower section of the conveying screen is positioned below the negative pressure cavity; the air nozzle module is positioned above the lower section of the conveying screen and sweeps the lower section of the conveying screen from top to bottom.

9. A cleaning device for a conveying screen according to claim 8, characterised in that: the negative pressure cavity is further provided with a vibration unit, and the vibration unit can vibrate the conveying screen.

10. A cleaning device for a conveying screen according to claim 1, characterised in that: and a collecting box body is arranged below the conveying screen.

Technical Field

The invention relates to the technical field of screen cleaning, in particular to a cleaning device for conveying a screen.

Background

For traditional solid-liquid separation equipment, mainly through the screen cloth separation to utilize heavy shock dynamo vibrations screen cloth in order to realize the separation of solid phase and liquid phase, but because solid phase and liquid phase have certain adsorptivity, when especially separating to the liquid that viscosity is higher, the screen cloth easily blocks up, consequently needs to wash the screen cloth.

In the prior art, compressed air is generally adopted to directly blow and sweep a screen, so that the energy consumption is high, the on-site noise exceeds 75 decibels, and the defects of limited blowing area, incomplete blowing and the like exist.

Therefore, a new cleaning device for conveying screen is needed to solve the above problems in the prior art.

Disclosure of Invention

The invention aims to provide a cleaning device for a conveying screen, which is used for solving the problems in the prior art and can realize automatic cleaning of the conveying screen, so that blockage can be eliminated and the filtering efficiency of the screen is improved.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a cleaning device for a conveying screen, comprising:

the air nozzle module can spray compressed air to reversely blow the conveying screen;

the direction adjusting mechanism is connected with the air nozzle module and can adjust the blowing direction of the air nozzle module;

a differential pressure sensor capable of detecting a pressure on both sides of the conveying screen;

and the pressure difference sensor, the air nozzle module and the direction adjusting mechanism are all connected with the control unit.

Preferably, the air nozzle module comprises a sweeping air knife, the sweeping air knife comprises an air knife high-pressure cavity, an air inlet is formed in the air knife high-pressure cavity, the air inlet is connected with an air source through an air inlet pipe, a control valve is arranged on the air inlet pipe, and the control valve is connected with the control unit; and the air knife high-pressure cavity is also provided with an air seam which is communicated with the air knife high-pressure cavity.

Preferably, the thickness of the air gap is 0.03-0.10 mm.

Preferably, the direction adjusting mechanism comprises an adjusting support, the air nozzle module is rotatably connected with the adjusting support through a rotating shaft, the rotating shaft is connected with a driving motor, and the driving motor can drive the air nozzle module to swing left and right.

Preferably, still include the rivers nozzle module, the rivers nozzle module is close to the air nozzle module sets up, the rivers nozzle module includes a plurality of rivers nozzles that set up side by side, the rivers nozzle is connected with the inlet tube, the water piping connection has the high-pressure pump, the high-pressure pump with the control unit is connected.

Preferably, the high pressure pump is a pulse pump, and the high pressure pump can enable the water flow nozzle to reversely wash the conveying screen in a pulse mode.

Preferably, the air nozzle module and the water nozzle module are uniformly distributed in multiple groups.

Preferably, the conveying screen is an enclosed screen, an inner cavity is defined by the conveying screen, a negative pressure cavity is arranged in the inner cavity, and the negative pressure cavity is connected with a negative pressure generating box; the upper end opening of the negative pressure cavity is opposite to the lower surface of the upper section of the conveying screen, and the lower section of the conveying screen is positioned below the negative pressure cavity; the air nozzle module is positioned above the lower section of the conveying screen and sweeps the lower section of the conveying screen from top to bottom.

Preferably, a vibration unit is further arranged on the negative pressure cavity and can vibrate the conveying screen.

Preferably, a collection box is arranged below the conveying screen.

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

according to the invention, the pressure difference sensor is arranged to detect the pressure on two sides of the conveying screen, and the control unit judges whether to start the cleaning device or not after comparing with a program set value, so that the cleaning device can be controlled to automatically clean the conveying screen; and the direction adjusting mechanism is arranged, so that the blowing direction of the air nozzle module can be adjusted, the blowing area can be increased, and the filtering efficiency of the screen can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic illustration of the installation of a cleaning apparatus for a conveyor screen according to the present invention;

FIG. 2 is a schematic structural view of a solid-liquid separation apparatus according to the present invention;

FIG. 3 is a schematic structural view of an air nozzle module of the present invention;

FIG. 4 is a schematic control diagram of the cleaning apparatus for a transport screen according to the present invention;

wherein: 1-a filter box assembly; 2-a frame body; 3-a feed tray; 4-negative pressure generating box; 5-a negative pressure cavity; 6-a vibration unit; 7-a conveyor chain; 8-conveying a screen mesh; 9-a pressing wheel; 10-an air nozzle module; 101-air knife high pressure chamber; 102-an air inlet; 103-air gap; 11-water flow nozzle module.

Detailed Description

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

The invention aims to provide a cleaning device for a conveying screen, which is used for solving the problems in the prior art and can realize automatic cleaning of the conveying screen, so that blockage can be eliminated and the filtering efficiency of the screen is improved.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1-4: the embodiment provides a belt cleaning device for transporting screen cloth, includes:

the air nozzle module 10 is used for blowing compressed air to reversely blow the conveying screen 8 by the air nozzle module 10;

the direction adjusting mechanism is connected with the air nozzle module 10 and can adjust the blowing direction of the air nozzle module 10;

a differential pressure sensor capable of detecting pressures on both sides of the conveying screen 8;

the control unit, the differential pressure sensor, the air nozzle module 10 and the direction adjusting mechanism are all connected with the control unit; the control unit can be selected according to the working requirement, such as selecting a PLC control unit.

In this embodiment, through differential pressure sensor real-time detection transport 8 both sides pressure differential, in case pressure differential exceeds the setting value in time automatic start belt cleaning device, rinse many times repeatedly and sweep transport 8 sieves, realize the work of cleaing away and dredging of screen cloth residue.

In this embodiment, the air nozzle module 10 includes a sweeping air knife, the sweeping air knife includes an air knife high-pressure chamber 101, an air inlet 102 is formed in the air knife high-pressure chamber 101, the air inlet 102 is connected to an air source through an air inlet pipe, the air source is a compressed air tank, the compressed air tank can provide compressed air, a control valve is arranged on the air inlet pipe, the control valve is connected to the control unit, and the control unit controls whether the sweeping air knife is turned on to work; the air knife high-pressure cavity 101 is also provided with an air slit 103, the air slit 103 is communicated with the air knife high-pressure cavity 101, and the thickness of the air slit 103 is 0.03-0.10 mm.

In this embodiment, the sweeping air knife uses the fluid coanda effect (coanda effect) to reverse purge the transport screen 8; compressed air enters the air knife high-pressure cavity 101 through the air inlet 102, air flow passes through a narrow and thin (preferably 0.05mm) air gap 103, a balanced air flow sheet is formed in the length direction of the sweeping air knife, the coanda curved surfaces on two sides of the air gap 103 have an air amplification ratio of 40:1, so that the loss of air flow speed is minimum, the pressure is maximum, an air flow sheet with strong impact force and minimum shearing force is generated, the outlet air speed is obviously increased, the air volume is increased, and residual blockage is further removed; wherein, the air current can easily realize large flow, strong impact, low air consumption and low noise (only 69dBA, normal talking 75 dBA).

In this embodiment, direction adjustment mechanism is including adjusting the support, and air nozzle module 10 rotates through the pivot and is connected with adjusting the top of support, and the pivot is connected with driving motor, and driving motor can drive air nozzle module 10 reciprocating swing about to realize air nozzle module 10's direction and adjust, improve and sweep the area.

In this embodiment, still include rivers nozzle module 11, rivers nozzle module 11 is close to the setting of air nozzle module 10, and rivers nozzle module 11 includes a plurality of rivers nozzles that set up side by side, and rivers nozzle is connected with the inlet tube, advances water piping connection and has the high-pressure pump, and the liquid after the filtration can be gone into to the high-pressure pump, and the high-pressure pump is connected with the control unit.

In this embodiment, the high-pressure pump is a pulse pump, which enables the water jet nozzles to back-flush the conveying screen 8 in a pulsed manner.

In the embodiment, high-pressure stamping is adopted, filtered liquid is sprayed out from water flow nozzles arranged according to a specific sequence through a high-pressure pump, the sprayed liquid adopts a high-speed pulse mode, then compressed air is not sprayed in a directional mode, and reverse cleaning and blowing work on the conveying screen 8 is realized through composite blowing of the high-pressure liquid and the compressed air.

In this embodiment, air nozzle module 10 and 11 equipartitions of rivers nozzle module have the multiunit, can carry screen cloth 8 comprehensive reverse washing.

In the embodiment, the conveying screen 8 is a closed screen, the conveying screen 8 is enclosed to form an inner cavity, a negative pressure cavity 5 is arranged in the inner cavity, and the negative pressure cavity 5 is connected with a negative pressure generating box 4 to generate negative pressure; the upper end opening of the negative pressure cavity 5 is opposite to the lower surface of the upper section of the conveying screen 8, and the lower section of the conveying screen 8 is positioned below the negative pressure cavity 5. The differential pressure sensor is arranged at the upper end of the negative pressure cavity 5, and is used for detecting the internal and external differential pressure of the negative pressure cavity 5 (namely the differential pressure of the upper side and the lower side of the working section of the conveying screen 8), when the internal and external differential pressure of the negative pressure cavity 5 is higher than a set value, the blockage area of the conveying screen 8 is larger, the purging is started at the moment, and when the negative pressure returns to a normal value interval, the purging is stopped; the air nozzle module 10 and the water nozzle module 11 are located above the lower section of the conveying screen 8, and perform back flushing and purging on the lower section of the conveying screen 8 from top to bottom. Wherein, the upper segment of conveying screen 8 is the working segment, and the material is sieved at the working segment.

In this embodiment, the negative pressure chamber 5 is further provided with a vibration unit 6, the vibration unit 6 is located below the upper section of the conveying screen 8 and can vibrate the conveying screen 8, and the structure of the vibration unit 6 is selected according to specific work requirements.

In the prior art, when a vibration motor (the vibration motor is fixed on a vibration beam of equipment) is adopted to vibrate the whole equipment, the vibration generates high vibration force, and screening is realized through the high vibration force; in the embodiment, the high-frequency vibration unit 6 is arranged below the conveying screen 8, so that high-frequency low-amplitude vibration of the conveying screen 8 is realized, the main work of the conveying screen 8 is realized by negative pressure, the noise is low, the closed operation of the conveying screen 8 can be realized, and the vibration noise can be further reduced.

In this embodiment, a collection box is provided below the conveyance screen 8, and the blown-out plugs, sewage, and the like can be effectively recovered.

In this embodiment, the control unit may further be connected to an expansion module, and the expansion module may expand the analog quantity, the thermal resistor, the thermocouple unit, and the like according to the work requirement.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.