CN111546497A - Special-shaped blanking cone hopper device - Google Patents

Special-shaped blanking cone hopper device Download PDF

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Publication number
CN111546497A
CN111546497A CN202010341241.8A CN202010341241A CN111546497A CN 111546497 A CN111546497 A CN 111546497A CN 202010341241 A CN202010341241 A CN 202010341241A CN 111546497 A CN111546497 A CN 111546497A
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CN
China
Prior art keywords
special
shaped
batching
cone
mixing
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Granted
Application number
CN202010341241.8A
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Chinese (zh)
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CN111546497B (en
Inventor
张玉囤
商敬金
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Zhangqiu Huaming Cement New Building Material Co ltd
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Zhangqiu Huaming Cement New Building Material Co ltd
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Priority to CN202010341241.8A priority Critical patent/CN111546497B/en
Publication of CN111546497A publication Critical patent/CN111546497A/en
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Publication of CN111546497B publication Critical patent/CN111546497B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04Supplying or proportioning the ingredients
    • B28C7/0481Plant for proportioning, supplying or batching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0007Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02Controlling the operation of the mixing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00Large containers
    • B65D88/54Large containers characterised by means facilitating filling or emptying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00Large containers
    • B65D88/54Large containers characterised by means facilitating filling or emptying
    • B65D88/64Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/66Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention aims to provide a special-shaped blanking cone hopper device which is used for solving the technical problem of feeding. A special-shaped blanking cone hopper device comprises a special-shaped cone mechanism and a batching mechanism; the special-shaped cone mechanism comprises a special-shaped cone cylinder and a metering electric control valve, the taper of the lower side part of the special-shaped cone cylinder is smaller than that of the upper side part, and a discharge port at the lower end of the special-shaped cone cylinder is communicated with the upper end of a batching box of the batching mechanism; the metering electric control valve is arranged on a discharge port at the lower end of the special-shaped conical cylinder, and a discharge port at the lower end of the batching box is positioned above the conveyor; the lower end discharge port of the batching box is provided with a discharge electric control valve.

Description

Special-shaped blanking cone hopper device
Technical Field
The invention relates to the technical field of cement material proportioning devices, in particular to a special-shaped blanking cone hopper device.
Background
In cement production, in order to improve cement performance, cement materials need multiple component proportions. In the prior art, the hopper for proportioning cement materials is mostly in a conical shape, and the hopper with the conical structure is easy to shed materials at a discharge port below the hopper due to the adoption of a centrosymmetric structure. Once the shed material condition occurs, the material is difficult to move downwards.
Disclosure of Invention
The invention aims to provide a special-shaped blanking cone hopper device which is used for solving the technical problem of feeding.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a special-shaped blanking cone hopper device comprises a special-shaped cone mechanism and a batching mechanism;
the special-shaped cone mechanism comprises a special-shaped cone cylinder and a metering electric control valve, the taper of the lower side part of the special-shaped cone cylinder is smaller than that of the upper side part, and a discharge port at the lower end of the special-shaped cone cylinder is communicated with the upper end of a batching box of the batching mechanism; the metering electric control valve is arranged on a discharge port at the lower end of the special-shaped conical cylinder, and a discharge port at the lower end of the batching box is positioned above the conveyor; the lower end discharge port of the batching box is provided with a discharge electric control valve.
Preferably, the special-shaped cone is provided with a vibrator.
Preferably, the abnormal shape awl mechanism includes tapering regulating plate and tapering actuating cylinder, and the tapering regulating plate sets up in abnormal shape awl section of thick bamboo downside, and the lower extreme in the lower tip of tapering regulating plate and abnormal shape awl section of thick bamboo downside is articulated, and tapering actuating cylinder establishes in the upper end downside of tapering regulating plate.
Preferably, the upper end of the taper adjusting plate is connected with the upper end in the lower side part of the special-shaped taper cylinder through a flexible connecting piece.
Preferably, a discharging detection photoelectric switch is arranged at a discharging port at the lower end of the special-shaped cone cylinder.
Preferably, the batching mechanism comprises a dredging mechanism, and the dredging mechanism is arranged on the side of the upper end of the batching box and corresponds to a discharge hole at the lower end of the special-shaped conical cylinder; the dredging mechanism comprises a high-pressure pneumatic nozzle and a dredging steering motor, and the high-pressure pneumatic nozzle is arranged on the rotary power output end of the dredging steering motor through a bracket.
Preferably, the batching mechanism comprises a batching and mixing mechanism, and the batching and mixing mechanism comprises a mixing motor, a mixing shaft and a mixing frame; the mixing shaft adopts a variable-pitch screw and is rotatably and transversely arranged on the batching box; the mixing motor is arranged outside the batching box, the rotary power output end of the mixing motor is connected with the rotary power input end of the mixing shaft, and the mixing frame is arranged on the circumferential surface of the mixing shaft;
the mixing frame comprises a plurality of mixing rods with different lengths.
Preferably, a vacuum generator is arranged on the batching box.
Preferably, the batching box adopts no upper cover structure, and the batching box is provided with ventilative dustproof cloth.
Preferably, the special-shaped blanking cone hopper device is further provided with a dust removal mechanism, and the dust removal mechanism comprises a first dust removal pipe, a first dust removal electric control valve, a second dust removal pipe and a second dust removal electric control valve; the dust removal port of the first dust removal pipe is communicated with the upper end of the batching box, and the first dust removal electric control valve is arranged on the first dust removal pipe; the dust removal port of the second dust removal pipe is positioned at the conveyor below the batching box, and the second dust removal electric control valve is installed on the second dust removal pipe.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and the technical solution has the following advantages or beneficial effects:
1. according to the technical scheme, the material can smoothly move downwards by adopting the special-shaped cone structure.
2. When the materials can not move downwards under the unexpected condition, the materials can be ensured to move downwards through the combined action of the vibrator, the taper adjusting plate and the taper adjusting cylinder.
3. A discharge detection photoelectric switch is arranged at a discharge hole at the lower end of the special-shaped cone cylinder, and whether a material falls is detected; after a discharge hole at the lower end of the special-shaped conical cylinder is blocked, dredging treatment can be carried out through a dredging mechanism of the batching mechanism.
4. The batching mixing mechanism of batching mechanism can realize stirring the space of material diversely through the mixing arm of different length and mix, and the removal of material on transversely can be realized to the mixing shaft of variable pitch screw rod structure to improve mixed effect.
5. The vacuum generator and the dust removal mechanism that the batching box set up can effectively avoid the diffusion of material powder.
6. The working mode of the dust removing mechanism is that when the special-shaped cone cylinder unloads, the first dust removing pipe works and the second dust removing pipe is cut off; when the batching box unloads, the second dust removal pipe works and the first dust removal pipe is cut off; so as to reduce the dust removal energy consumption.
Drawings
FIG. 1 is a schematic side cross-sectional view of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
in the figure: 1. a main frame; 2. a special-shaped cone; 21. discharging detection photoelectric switch; 3. a vibrator; 4. a taper adjusting plate; 5. a taper adjusting cylinder; 6. a metering electric control valve; 7. a flexible connector; 8. a batching box; 81. a dust cloth; 9. a vacuum generator; 10. a discharge electric control valve; 11. a high pressure pneumatic nozzle; 12. dredging a steering motor; 13. a hybrid motor; 14. a mixing shaft; 15. a mixing frame; 16. a first dust removal pipe; 17. a second dust removal pipe; 18. a conveyor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to be construed as only or implying relative importance.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, a special-shaped blanking cone hopper device comprises a control system, and a special-shaped cone mechanism, a batching mechanism and a dust removing mechanism which are electrically connected with the control system and are arranged on a main frame 1; the special-shaped cone mechanisms are provided with a plurality of sets which are respectively communicated and arranged above the batching mechanism and used for conveying materials; the batching mechanism is used for receiving materials from the special-shaped cone mechanism, stirring and mixing various materials, and transmitting the stirred and mixed materials to the outside from the lower conveyor 18; the dust removing mechanism is used for adsorbing the volatile powder in the material mixing mechanism and the volatile powder on the conveyor 18.
The special-shaped cone mechanism comprises a special-shaped cone barrel 2, a vibrator 3, a taper adjusting plate 4, a taper adjusting cylinder 5, a metering electric control valve 6 and a discharge detection photoelectric switch 21. The conicity of the lower side part of the special-shaped conical cylinder 2 is smaller than that of the upper side part, so that the situation of lower-end shed material is prevented under the condition of smooth discharging. The taper adjusting plate 4 is arranged in the lower side part of the special-shaped conical barrel 2, the lower end part of the taper adjusting plate 4 is hinged with the lower end in the lower side part of the special-shaped conical barrel 2, and the upper end of the taper adjusting plate 4 is connected with the upper end in the lower side part of the special-shaped conical barrel 2 through a flexible connecting piece 7 (such as canvas). The taper adjusting cylinder 5 is arranged on the lower side of the upper end of the taper adjusting plate 4 and used for adjusting the inclination angle of the taper adjusting plate 4 in the special-shaped taper barrel 2 when materials cannot smoothly slide off. The vibrator 3 is arranged below the side of the taper adjusting plate 4 and used for vibrating and beating the taper adjusting plate 4 so as to facilitate the sliding of materials. The metering electric control valve 6 is arranged at a discharge port at the lower end of the special-shaped cone 2 and is used for metering and controlling the discharging or stopping of the special-shaped cone 2. The discharging detection photoelectric switch 21 is also arranged at the discharging port at the lower end of the special-shaped cone cylinder 2 and is positioned below the metering electric control valve 6; and after the metering electric control valve 6 is opened, detecting whether the material falls.
The batching mechanism comprises a batching box 8, a batching mixing mechanism, a dredging mechanism, a vacuum generator 9 and an electric discharging valve 10. The batching box 8 adopts a structure without an upper cover, and the upper end of the batching box 8 is respectively communicated with the discharge hole of the special-shaped conical cylinder 2. In order to prevent excessive volatilization of the powder of the material, the upper end of the batching box 8 can be provided with a breathable dustproof cloth 81. The dredging mechanism is arranged on the side of the upper end of the batching box 8 and corresponds to a discharge hole at the lower end of the special-shaped conical cylinder 2; when the discharge detection photoelectric switch 21 detects that the discharge hole of the special-shaped cone cylinder 2 is blocked, the special-shaped cone cylinder is used for dredging the special-shaped cone cylinder. The dredging mechanism comprises a high-pressure pneumatic nozzle 11 and a dredging steering motor 12, the high-pressure pneumatic nozzle 11 is arranged on the rotary power output end of the dredging steering motor 12 through a bracket and is used for enabling the high-pressure pneumatic nozzle 11 to be far away from or close to the lower part of the discharge hole of the special-shaped conical barrel 2; the high-pressure pneumatic nozzle 11 is connected with an external air supply device through a pipeline and an electric control air valve. The ingredient mixing mechanism comprises a mixing motor 13, a mixing shaft 14 and a mixing frame 15; the mixing shaft 14 adopts a variable-pitch screw rod and is rotatably and transversely arranged on the batching box 8; the mixing motor 13 is installed outside the batching box 8, and the rotary power output end of the mixing motor 13 is connected with the rotary power input end of the mixing shaft 14. The mixing frame 15 includes a plurality of mixing rods of different lengths, which are mounted on a circumferential surface of the mixing shaft 14. Mixing rod of different length can realize stirring the space of material diversely and mix, and the removal of material on transversely can be realized to the mixing shaft 14 of variable pitch screw rod structure to improve mixed effect. Vacuum generator 9 installs on batching box 8, realizes the interior negative pressure state of batching box 8, reduces outwards volatilizing of material. And the discharging electric control valve 10 is arranged on a discharging port at the lower end of the batching box 8 and is used for controlling the discharging or stopping of the batching box 8.
The dust removal mechanism comprises a first dust removal pipe 16, a first dust removal electric control valve, a second dust removal pipe 17 and a second dust removal electric control valve; a dust removal port of the first dust removal pipe 16 is communicated with the upper end of the batching box 8 and is used for adsorbing volatile powder during unloading of the special-shaped cone barrel 2, and the first dust removal electric control valve is arranged on the first dust removal pipe 16; the dust removal port of the second dust removal pipe 17 is positioned at the conveyor 18 below the batching box 8 and used for adsorbing the volatile powder in the unloading process of the batching box 8, and the second dust removal electric control valve is arranged on the second dust removal pipe 17. The first dust removing pipe 16 and the second dust removing pipe 17 are respectively communicated with an external dust removing device through a dust removing header pipe. The working mode of the dust removing mechanism is that when the special-shaped cone 2 unloads, the first dust removing pipe 16 works and the second dust removing pipe 17 is cut off; when the batching box 8 discharges materials, the second dust removing pipe 17 works and the first dust removing pipe 16 is cut off; so as to reduce the dust removal energy consumption.
The control system comprises a controller, a control panel and a control box, wherein the controller is electrically connected with each corresponding related control functional component.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A special-shaped blanking cone hopper device is characterized by comprising a special-shaped cone mechanism and a batching mechanism;
the special-shaped cone mechanism comprises a special-shaped cone cylinder and a metering electric control valve, the taper of the lower side part of the special-shaped cone cylinder is smaller than that of the upper side part, and a discharge port at the lower end of the special-shaped cone cylinder is communicated with the upper end of a batching box of the batching mechanism; the metering electric control valve is arranged on a discharge port at the lower end of the special-shaped conical cylinder, and a discharge port at the lower end of the batching box is positioned above the conveyor; the lower end discharge port of the batching box is provided with a discharge electric control valve.
2. The special-shaped blanking cone bucket device as claimed in claim 1, wherein the special-shaped cone cylinder is provided with a vibrator.
3. The special-shaped blanking cone bucket device as claimed in claim 1, wherein the special-shaped cone mechanism comprises a taper adjusting plate and a taper adjusting cylinder, the taper adjusting plate is arranged in the lower side portion of the special-shaped cone barrel, the lower end portion of the taper adjusting plate is hinged with the lower end in the lower side portion of the special-shaped cone barrel, and the taper adjusting cylinder is arranged below the upper end portion of the taper adjusting plate.
4. The special-shaped blanking cone bucket device as claimed in claim 3, wherein the upper end of the taper adjusting plate is connected with the upper end in the lower side part of the special-shaped cone cylinder through a flexible connecting piece.
5. The special-shaped blanking cone hopper device as claimed in claim 1, wherein a discharging detection photoelectric switch is arranged at a discharging port at the lower end of the special-shaped cone cylinder.
6. The special-shaped blanking cone hopper device as claimed in claim 1, wherein the batching mechanism comprises a dredging mechanism, the dredging mechanism is arranged on the side of the upper end of the batching box and corresponds to a discharge hole at the lower end of the special-shaped cone cylinder; the dredging mechanism comprises a high-pressure pneumatic nozzle and a dredging steering motor, and the high-pressure pneumatic nozzle is arranged on the rotary power output end of the dredging steering motor through a bracket.
7. The special-shaped blanking cone hopper device as claimed in claim 1, wherein the batching mechanism comprises a batching and mixing mechanism, and the batching and mixing mechanism comprises a mixing motor, a mixing shaft and a mixing frame; the mixing shaft adopts a variable-pitch screw and is rotatably and transversely arranged on the batching box; the mixing motor is arranged outside the batching box, the rotary power output end of the mixing motor is connected with the rotary power input end of the mixing shaft, and the mixing frame is arranged on the circumferential surface of the mixing shaft;
the mixing frame comprises a plurality of mixing rods with different lengths.
8. The special-shaped blanking cone hopper device as claimed in claim 1, wherein a vacuum generator is arranged on the batching box.
9. The special-shaped blanking cone hopper device as claimed in claim 1, wherein the batching box is of a structure without an upper cover, and is provided with air-permeable dustproof cloth.
10. The special-shaped blanking cone hopper device as claimed in claim 1, wherein the special-shaped blanking cone hopper device is further provided with a dust removing mechanism, and the dust removing mechanism comprises a first dust removing pipe, a first dust removing electric control valve, a second dust removing pipe and a second dust removing electric control valve; the dust removal port of the first dust removal pipe is communicated with the upper end of the batching box, and the first dust removal electric control valve is arranged on the first dust removal pipe; the dust removal port of the second dust removal pipe is positioned at the conveyor below the batching box, and the second dust removal electric control valve is installed on the second dust removal pipe.
CN202010341241.8A 2020-04-26 2020-04-26 Special-shaped blanking cone hopper device Active CN111546497B (en)

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Application Number Priority Date Filing Date Title
CN202010341241.8A CN111546497B (en) 2020-04-26 2020-04-26 Special-shaped blanking cone hopper device

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CN111546497B CN111546497B (en) 2021-08-17

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383725A (en) * 1989-10-02 1995-01-24 Cmi Corporation Asphalt/dust/rubber processing equipment
DE29723746U1 (en) * 1997-11-04 1999-02-04 Hoffmann Manfred Device for ensuring the concrete quality in the mixing drum of a ready-mixed concrete vehicle
CN201148384Y (en) * 2008-01-18 2008-11-12 上海德源水处理工程有限公司 Powdery lime automatic metering and preparing apparatus
CN202185979U (en) * 2011-07-21 2012-04-11 麻双青 Combined mortar stirring equipment with metering function
CN202186645U (en) * 2011-07-26 2012-04-11 中国神华能源股份有限公司 Discharge funnel of silo and silo
CN202462631U (en) * 2012-02-27 2012-10-03 山东金石源节能科技有限公司 Foam concrete decrement counting and forming device
CN104691987A (en) * 2015-02-27 2015-06-10 福建工程学院 Dust hopper device and ash loosening method adopting dust hopper device
CN208201149U (en) * 2018-04-24 2018-12-07 珠海盛田实业有限公司 Anticlogging alumina blanking system
CN208453869U (en) * 2018-06-04 2019-02-01 大厂金隅涂料有限责任公司 A kind of coating material production metering conveyor
CN209438556U (en) * 2019-01-23 2019-09-27 青岛合盛源重工科技有限公司 A kind of powder grain material matches material conveying device
CN110902325A (en) * 2019-12-07 2020-03-24 江苏冠图基础工程有限公司 Device for preventing pipe discharging blockage

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383725A (en) * 1989-10-02 1995-01-24 Cmi Corporation Asphalt/dust/rubber processing equipment
DE29723746U1 (en) * 1997-11-04 1999-02-04 Hoffmann Manfred Device for ensuring the concrete quality in the mixing drum of a ready-mixed concrete vehicle
CN201148384Y (en) * 2008-01-18 2008-11-12 上海德源水处理工程有限公司 Powdery lime automatic metering and preparing apparatus
CN202185979U (en) * 2011-07-21 2012-04-11 麻双青 Combined mortar stirring equipment with metering function
CN202186645U (en) * 2011-07-26 2012-04-11 中国神华能源股份有限公司 Discharge funnel of silo and silo
CN202462631U (en) * 2012-02-27 2012-10-03 山东金石源节能科技有限公司 Foam concrete decrement counting and forming device
CN104691987A (en) * 2015-02-27 2015-06-10 福建工程学院 Dust hopper device and ash loosening method adopting dust hopper device
CN208201149U (en) * 2018-04-24 2018-12-07 珠海盛田实业有限公司 Anticlogging alumina blanking system
CN208453869U (en) * 2018-06-04 2019-02-01 大厂金隅涂料有限责任公司 A kind of coating material production metering conveyor
CN209438556U (en) * 2019-01-23 2019-09-27 青岛合盛源重工科技有限公司 A kind of powder grain material matches material conveying device
CN110902325A (en) * 2019-12-07 2020-03-24 江苏冠图基础工程有限公司 Device for preventing pipe discharging blockage

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