A multi-point feeding system capable of realizing online screening and vacuum conveying

Abstract

The present invention discloses a multi-point feeding system capable of realizing online screening and vacuum conveying, comprising a dust-free feeding station, an online screening horizontal airflow screen and a vacuum feeder which are sealed and connected in sequence through a material conveying pipeline along the material conveying direction. The vacuum feeder is sealed and connected to a vacuum pump arranged on one side of the vacuum feeder through a gas exchange valve and a gas conveying pipeline, which is used to form a negative pressure environment in the vacuum feeder and then convey the powder material from the online screening horizontal airflow screen to the vacuum feeder under negative pressure. The bottom discharge end of the vacuum feeder is sealed and connected with a rotary joint, and the bottom discharge end of the rotary joint is sealed and connected with a switching feeding pipeline, and the feeding pipeline is switched by rotating to realize unloading into multiple receiving devices respectively. The present invention can realize dust-free feeding, large online ultrafine screening output, automatic negative pressure feeding, cache saving labor multi-point transportation, convenient and fast operation and flexible multi-point receiving operation.

Description

Technical Field

[0001] The invention belongs to the technical field of multi-point feeding systems for powder materials, and in particular relates to a multi-point feeding system capable of realizing online screening and vacuum transportation. Background Art

[0002] At present, in the production process of food, medicine, chemical industry, etc., many materials are in powder state, and there will be a lot of dust in the feeding process. Especially in the food and medicine industry, the material fineness is getting finer and finer, and ordinary rotary vibrating screens have certain difficulties in screening ultra-fine materials. Usually there are shortcomings such as large dust, low output and easy mesh rot. At the same time, when manually transporting multiple points of receiving materials, the labor operation intensity of workers is high, the cost is high, and it is difficult to switch flexibly when feeding at multiple points. Summary of the invention

[0003] The technical problem solved by the invention is to provide a multi-point feeding system which has reasonable structural design and flexible and convenient operation and can realize online screening and vacuum transportation.

[0004] In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a multi-point feeding system capable of realizing online screening and vacuum conveying, characterized in that it comprises a dust-free feeding station, an online screening horizontal airflow screen and a vacuum loader which are sealed and connected in sequence through material conveying pipelines along the material conveying direction; the vacuum loader is sealed and connected to a vacuum pump arranged on one side of the vacuum loader through an air exchange valve and a gas conveying pipeline, so as to form a negative pressure environment in the vacuum loader and then convey the powder material from the online screening horizontal airflow screen to the vacuum loader under negative pressure; a rotary joint is sealed and connected to the bottom discharge end of the vacuum loader; a switching feeding pipeline is sealed and connected to the bottom discharge end of the rotary joint; and unloading into multiple receiving devices is realized by rotating the switching feeding pipeline.

[0005] It is further defined that the dust-free feeding station includes a frame, a storage bin arranged on the frame and a double-vibration source straight-discharge screen arranged at the bottom of the storage bin, a charging bin door is arranged on one side of the storage bin, and a dust removal fan linked with the charging bin door is arranged on the top of the storage bin, which is used to automatically start the dust removal fan when the charging bin door is opened and automatically stop the dust removal fan when the charging bin door is closed, the air inlet pipe of the dust removal fan extends to the interior of the storage bin and a powder filtering device is installed at the end of the air inlet pipe, and a pulse backblowing device is arranged on the storage bin opposite to the charging bin door, which is linked with the charging bin door to realize backblowing of the powder filtering device, Now, after closing the charging bin door, the pulse backblowing device is automatically started and automatically stops after the pulse backblowing device works for the set time. The upper feed end of the dual-vibration source in-line screen is sealed with the bottom discharge end of the storage bin through a soft connection. The dual-vibration source in-line screen is fixed to the supporting surface at the bottom of the frame through a shock absorbing mechanism. The bottom of the dual-vibration source in-line screen is connected with an adapter, which consists of a discharge pipe and a conical discharge hopper fixed on the discharge pipe, wherein the upper feed end of the conical discharge hopper is sealed with the bottom discharge end of the dual-vibration source in-line screen through a clamp, and the discharge pipe is sealed with the material conveying pipeline through a corrugated hose and a quick clamp.

[0006] It is further defined that the online screening horizontal air flow screen includes a frame and a screen box arranged on the frame, a feed port is provided on one side of the screen box above the frame, the feed port is sealed with the material conveying pipeline through a quick clamp, a pull-out transmission shaft is installed on the inner side of the feed port from the outside of the screen box to the inside of the screen box, a mesh cage with a tightening frame on the outer end is installed on the screen box corresponding to the other end of the transmission shaft to the outer side of the blades of the transmission shaft, a rear end cover fixed by a hinge is provided on the screen box wall outside the tightening frame, a powder hopper is provided at the bottom of the screen box below the mesh cage, a fine material outlet is provided at the bottom of the powder hopper, the fine material outlet is sealed with the feed port of the vacuum loader through the material conveying pipeline, and a coarse material outlet is provided at the bottom of the screen box at the rear end of the mesh cage, and the coarse material outlet is sealed with the quick-opening barrel through a manual quick-opening butterfly valve.

[0007] It is further defined that the vacuum loader and the vacuum pump are both arranged on a supporting platform, and a staircase is provided on one side of the supporting platform for the operator to climb onto the supporting platform to operate and maintain the vacuum loader. The vacuum loader comprises a negative pressure cylinder, a feed cylinder and a pneumatic butterfly valve which are sealed and connected upper and lower. A ventilation valve which is connected to the inner cavity of the negative pressure cylinder is provided on the side wall of the negative pressure cylinder, and the air outlet at the other end of the ventilation valve is sealed and connected to the vacuum pump through a gas conveying pipe, and is used to provide a negative pressure environment for negative pressure feeding of materials and a positive pressure environment for smooth unloading of materials by switching the ventilation valve. A feed port which is sealed and connected to the material conveying pipe is provided on the outer wall of the feed cylinder, and the lower part of the feed cylinder is a conical necking structure. A pneumatic butterfly valve is provided at the bottom of the feed cylinder, and the bottom outlet of the pneumatic butterfly valve is sealed and connected to the upper feed port of the rotary joint.

[0008] It is further defined that a plurality of receiving devices are provided at the lower part of the vacuum loader, and the feeding ends of the plurality of receiving devices are respectively opposite to the bottom discharge ends of the switching feeding pipe, and are used to rotate the switching feeding pipe to the receiving port of the corresponding receiving device by manually operating the switching feeding pipe, and unload the material into the corresponding receiving device by opening the pneumatic butterfly valve.

[0009] It is further defined that the material receiving equipment is a dough mixer, a mixer, a turnover silo or a blender.

[0010] It is further defined that a glass pipe sight glass is provided on the material conveying pipe between the online screening horizontal air flow screen and the vacuum loader, for observing the flow of materials in the material conveying pipe through the glass pipe sight glass, and a large radius elbow is provided at the turning point of the material conveying pipe, for effectively reducing the conveying resistance of the material conveying pipe.

[0011] It is further defined that the feed cylinder of the vacuum loader is provided with a manhole for cleaning the material inside the feed cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention can realize dust-free feeding, large online ultrafine screening output, negative pressure automatic feeding, buffering and labor-saving multi-point transfer, convenient and fast operation and flexible multi-point receiving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a side view of the present invention.

[0015] In the figure: 1-dust-free feeding station, 2-online screening horizontal airflow screen, 3-material conveying pipeline, 4-vacuum loader, 5-feeding barrel, 6-pneumatic butterfly valve, 7-rotating joint, 8-switching feeding pipeline, 9-1# dough mixer, 10-2# dough mixer, 11-support platform, 12-gas conveying pipeline, 13-dual vibration source straight screen, 14-adapter, 15-powder hopper, 16-manual quick-opening butterfly valve, 17-quick-opening barrel, 18-vacuum pump. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described in detail with reference to the accompanying drawings. Figure 1-2As shown, a multi-point feeding system capable of realizing online screening and vacuum conveying includes a dust-free feeding station 1, an online screening horizontal airflow screen 2 and a vacuum loader 4, which are sealed and connected in sequence through a material conveying pipeline 3 along the material conveying direction. The vacuum loader 4 is sealed and connected to a vacuum pump 18 arranged on one side of the vacuum loader 3 through a ventilation valve and a gas conveying pipeline 12, so as to form a negative pressure environment in the vacuum loader 4 and then negatively convey the powder material from the online screening horizontal airflow screen 2 to the vacuum loader 4. The bottom discharge end of the vacuum loader 4 is sealed and connected to a rotary joint 7, and the bottom discharge end of the rotary joint 7 is sealed and connected to a switching feeding pipeline 8, and the switching feeding pipeline 8 is rotated to realize unloading into multiple receiving devices respectively.

[0017] The dust-free feeding station 1 of the present invention comprises a frame, a storage bin arranged on the frame and a double-vibration source straight-discharge screen 13 arranged at the bottom of the storage bin, a charging bin door is arranged on one side of the storage bin, a dust removal fan linked with the charging bin door is arranged on the top of the storage bin, which is used to automatically start the dust removal fan when the charging bin door is opened and automatically stop the dust removal fan when the charging bin door is closed, an air inlet pipe of the dust removal fan extends to the interior of the storage bin and a powder filtering device is installed at the end of the air inlet pipe, and a pulse back-blowing device linked with the charging bin door to realize back-blowing of the powder filtering device is arranged on the storage bin opposite to the charging bin door, which is used to realize back-blowing of the powder filtering device when the charging bin door is closed The pulse back-blowing device automatically starts behind the bin door and automatically stops after the pulse back-blowing device works for the set time. The upper feed end of the dual-vibration source in-line screen 13 is sealed with the discharge end at the bottom of the storage bin through a soft connection. The dual-vibration source in-line screen 13 is fixed to the supporting surface at the bottom of the frame through a shock-absorbing mechanism. The bottom of the dual-vibration source in-line screen 13 is connected with an adapter 14, which consists of a discharge pipe and a conical discharge hopper fixed on the discharge pipe, wherein the upper feed end of the conical discharge hopper is sealed with the bottom discharge end of the dual-vibration source in-line screen 13 through a clamp, and the discharge pipe is sealed with the material conveying pipeline 3 through a corrugated hose and a quick clamp.

[0018] The online screening horizontal air flow screen 2 described in the present invention includes a frame and a screen box arranged on the frame, a feed port is provided on one side of the screen box above the frame, the feed port is sealed with a material conveying pipe 3 through a quick clamp, a pull-out transmission shaft is installed from the outside of the screen box to the inside of the screen box on the inner side of the feed port, a mesh cage with a tightening frame on the outer end is installed on the screen box corresponding to the other end of the transmission shaft to the outer side of the blades of the transmission shaft, a rear end cover fixed by a hinge is provided on the screen box wall outside the tightening frame, a powder hopper 15 is provided at the bottom of the screen box below the mesh cage, a fine material outlet is provided at the bottom of the powder hopper 15, the fine material outlet is sealed with the feed port of the vacuum loader 4 through the material conveying pipe 3, and a coarse material outlet is provided at the bottom of the screen box at the rear end of the mesh cage, the coarse material outlet is sealed with a quick-opening barrel 17 through a manual quick-opening butterfly valve 16.

[0019] The vacuum loader 4 and the vacuum pump 18 described in the present invention are both arranged on a supporting platform 11. A staircase is provided on one side of the supporting platform 11 for operators to climb onto the supporting platform 11 to operate and repair the vacuum loader 3. The vacuum loader 4 includes a negative pressure cylinder, a feed cylinder 5 and a pneumatic butterfly valve 6 that are sealed and connected up and down. A ventilation valve connected to the inner cavity of the negative pressure cylinder is provided on the side wall of the negative pressure cylinder. The other end of the ventilation valve is sealed and connected to the vacuum pump 18 through a gas conveying pipe 12, and is used to provide a negative pressure environment for negative pressure feeding of materials and a positive pressure environment for smooth unloading of materials by switching the ventilation valve. A feed port that is sealed and connected to the material conveying pipe 3 is provided on the outer wall of the feed cylinder 5. The lower part of the feed cylinder 5 is a conical necking structure. A pneumatic butterfly valve 6 is provided at the bottom of the feed cylinder 5, and the bottom outlet of the pneumatic butterfly valve 6 is sealed and connected to the upper feed port of the rotary joint 7.

[0020] The lower part of the vacuum loader 4 described in the present invention is provided with multiple receiving devices, and the feeding ends of the multiple receiving devices are respectively opposite to the bottom discharge ends of the switching feeding pipe 8, which are used to switch the feeding pipe 8 by manual operation to rotate the switching feeding pipe 8 to the receiving port of the corresponding receiving device, and unload the material into the corresponding receiving device by opening the pneumatic butterfly valve 6.

[0021] The material receiving equipment of the present invention is a dough mixer, a mixer, a turnover silo or a stirrer.

[0022] A glass pipe sight glass is provided on the material conveying pipe 3 between the online screening horizontal airflow screen 2 and the vacuum loader 4 of the present invention, which is used to observe the flow of materials in the material conveying pipe 3 through the glass pipe sight glass. A large radius elbow is provided at the turning point of the material conveying pipe 3, which is used to effectively reduce the conveying resistance of the material conveying pipe 3.

[0023] The feeding cylinder 5 of the vacuum feeder 4 of the present invention is provided with a manhole for cleaning the material inside the feeding cylinder.

[0024] The specific use process of the present invention is as follows: the raw materials are manually fed into the dust-free feeding station 1, and then pre-screened through the dual-vibration source linear screen 13 below the dust-free feeding station 1 to achieve the purpose of large particle removal. The materials are efficiently screened by the negative pressure power of the lower adapter 14 of the dust-free feeding station 1 and the vacuum feeder 4, and the powder finished materials are fed into the feeding cylinder 5 of the vacuum feeder 4 through the negative pressure power and the material conveying pipeline 3. The unqualified materials screened by the online screening horizontal airflow screen 2 enter the inside of the quick-opening barrel 17 through the manual quick-opening butterfly valve 16. The powder finished material entering the feeding cylinder 5 of the vacuum feeder 4 enters the receiving equipment (1# dough mixer 9) by opening the pneumatic butterfly valve 6. The feeding pipeline 8 can also be switched manually by rotating the rotary joint 7 before the pneumatic butterfly valve 6 is opened. The pneumatic butterfly valve 6 is opened to allow the powder finished material to enter another receiving equipment (2# dough mixer 10). After the unloading is completed, the pneumatic butterfly valve 6 is closed, and the above operation cycle is continued to feed the next receiving point.

[0025] In the operation process of the entire feeding system of the present invention, only one worker is required to operate the dust-free feeding station. During the feeding process, the material is dust-free and pre-screened by a dual-vibration source linear screen, which intercepts impurities and large particles in the material well, so that the next process of the online screening horizontal airflow screen can be more effectively screened. The screening link is automatically transported to the receiving equipment through the negative pressure power of the vacuum feeder. In addition to the 1# dough mixer and the 2# dough mixer, the receiving equipment can also be a mixer, a turnover silo, a blender and other receiving equipment. The transportation process greatly saves the labor intensity and number of workers of manual handling operations. The multi-point feeding system described in the present invention can freely switch between multiple receiving points while increasing production, greatly increasing the flexibility of operation and saving operating costs.

[0026] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which all fall within the scope of the present invention to be protected.

Claims

1. A multi-point feeding system capable of achieving online screening and vacuum conveying, characterized in that The utility model comprises a dust-free feeding station, an online screening horizontal airflow screen and a vacuum feeder which are sealed and connected in sequence through a material conveying pipeline along the material conveying direction. The vacuum feeder is sealed and connected to a vacuum pump arranged on one side of the vacuum feeder through an air exchange valve and a gas conveying pipeline, which is used to form a negative pressure environment in the vacuum feeder and then convey the powder material from the online screening horizontal airflow screen to the vacuum feeder under negative pressure. The bottom discharge end of the vacuum feeder is sealed and connected to a rotary joint, and the bottom discharge end of the rotary joint is sealed and connected to a switching feeding pipeline, and the feeding pipeline is switched by rotation to realize unloading into multiple receiving devices respectively; the dust-free feeding station comprises a frame, a device A storage bin placed on the frame and a double-vibration source straight-discharge screen arranged at the bottom of the storage bin, a feeding bin door is arranged on one side of the storage bin, and a dust removal fan linked with the feeding bin door is arranged on the top of the storage bin, which is used to automatically start the dust removal fan when the feeding bin door is opened and automatically stop the dust removal fan when the feeding bin door is closed. The air inlet pipe of the dust removal fan extends to the interior of the storage bin and a powder filtering device is installed at the end of the air inlet pipe. A pulse back-blowing device is arranged on the storage bin opposite to the feeding bin door, which is linked with the feeding bin door to realize back-blowing of the powder filtering device, which is used to automatically start the pulse back-blowing device after closing the feeding bin door and stop the dust removal fan when the pulse back-blowing device is set. It stops automatically after a certain time has passed. The upper feed end of the dual-vibration source in-line screen is sealed with the bottom discharge end of the storage bin through a soft connection. The dual-vibration source in-line screen is fixed to the supporting surface at the bottom of the frame through a shock-absorbing mechanism. The bottom of the dual-vibration source in-line screen is connected with an adapter, which consists of a discharge pipe and a conical discharge hopper fixed on the discharge pipe, wherein the upper feed end of the conical discharge hopper is sealed with the bottom discharge end of the dual-vibration source in-line screen through a clamp, and the discharge pipe is sealed with the material conveying pipeline through a corrugated hose and a quick clamp; the online screening horizontal airflow screen comprises a frame and a screen box arranged on the frame, a feed port is provided on one side of the screen box above the frame, and the The feed port is sealed and connected to the material conveying pipeline through a quick clamp. A pull-out drive shaft is installed on the inner side of the feed port from the outside of the screen box to the inside of the screen box. A mesh cage with a top-tightening frame on the outer end is installed on the screen box corresponding to the other end of the drive shaft to the outer side of the blades of the drive shaft in a clearance fit. A rear end cover fixed by a hinge is provided on the screen box wall outside the top-tightening frame. A powder hopper is provided at the bottom of the screen box under the mesh cage. A fine material outlet is provided at the bottom of the powder hopper. The fine material outlet is sealed and connected to the feed port of the vacuum feeder through the material conveying pipeline. A coarse material outlet is provided at the bottom of the screen box at the rear end of the mesh cage. The coarse material outlet is sealed and connected to the quick-opening barrel through a manual quick-opening butterfly valve.The vacuum feeder and the vacuum pump are both arranged on a supporting platform, and a staircase is provided on one side of the supporting platform for the convenience of the operator to climb onto the supporting platform to operate and repair the vacuum feeder. The vacuum feeder comprises a negative pressure cylinder, a feeding cylinder and a pneumatic butterfly valve which are sealed and connected up and down. A ventilation valve which is connected to the inner cavity of the negative pressure cylinder is provided on the side wall of the negative pressure cylinder. The air outlet at the other end of the ventilation valve is sealed and connected to the vacuum pump through a gas delivery pipeline, and is used to provide a negative pressure environment for negative pressure feeding of materials and a positive pressure environment for smooth unloading of materials by switching the ventilation valve. The outer wall is provided with a feed port sealed with the material conveying pipeline, the lower part of the feed cylinder is a conical contraction type structure, the bottom of the feed cylinder is provided with a pneumatic butterfly valve, the bottom discharge port of the pneumatic butterfly valve is sealed with the upper feed port of the rotary joint; the lower part of the vacuum feeder is provided with multiple receiving devices, the feed ends of the multiple receiving devices are respectively opposite to the bottom discharge end of the switching feed pipe, and the switching feed pipe is used to rotate the switching feed pipe to the receiving port of the corresponding receiving device by manually operating the switching feed pipe, and discharge the material into the corresponding receiving device by opening the pneumatic butterfly valve. ; 2. The multi-point feeding system capable of realizing online screening and vacuum conveying according to claim 1, characterized in that: The material receiving equipment is a dough mixer, a mixer, a turnover silo or a blender.

3. The multi-point feeding system capable of realizing online screening and vacuum conveying according to claim 1, characterized in that: A glass pipe sight glass is provided on the material conveying pipe between the online screening horizontal airflow screen and the vacuum loader, which is used to observe the flow of materials in the material conveying pipe through the glass pipe sight glass. A large radius elbow is provided at the turning point of the material conveying pipe, which is used to effectively reduce the conveying resistance of the material conveying pipe.

4. The multi-point feeding system capable of realizing online screening and vacuum conveying according to claim 1, characterized in that: The feeding cylinder of the vacuum feeder is provided with a manhole for cleaning the materials inside the feeding cylinder.

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