Automatic cleaning powder and particle material sampling system

Abstract

The utility model discloses an automatic cleaning powder and particle material sampling system, which relates to the technical field of powder and particle material conveying, and is characterized in that a sampling pipeline is arranged at an opening of a material pipeline between a tank car and a bin body, a collecting device is arranged at the output end of the sampling pipeline, and a dust remover is arranged at the top of the collecting device; an air purifying chamber of the dust remover is connected with an inlet of an exhaust fan of the bin body through a negative pressure pipeline, an air door is arranged on the negative pressure pipeline, and after the air door is opened, negative pressure is formed on the collecting device under the suction action generated by operation of the exhaust fan; when the tank car unloads materials into the bin body, the materials in the unloading process are sampled and collected through the negative pressure in the collecting device and the micro-positive pressure in the pipeline from the tank car to the bin body, so that samples reach the collecting device from the sampling pipeline; before sampling, sampling can be carried out after the interior of the collecting device is purged, so that the authenticity and representativeness of sampling can be ensured, and the reliability of sampling is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder and particle material conveying technical field, especially a kind of automatic cleaning powder and particle material sampling system. BACKGROUND

[0002] In water treatment process, powder and particle material is usually prepared into solution of corresponding concentration, and manual sampling and testing are usually carried out when powder medicine arrives at factory, and the specific sampling method is to open the tank truck top cover to manually extract sample or to open hole on tank truck discharge pipe to connect valve and pipeline to manually sample.

[0003] Because of pressure in tank truck, the method of opening tank truck top cover has safety risk, and the method of opening hole on discharge pipe to connect valve has actual problems such as valve opening degree not easy to control, pipeline pressure easy to cause pollution and personal injury, and both sampling methods are not representative and authentic.

[0004] Therefore, how to make sampling process safe and pollution-free, and sample representative and authentic, is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of automatic cleaning powder and particle material sampling system, and sample representative and authentic, and the sampling process is safe and pollution-free.

[0006] To solve the above technical problems, the utility model embodiment provides a kind of automatic cleaning powder and particle material sampling system, including tank truck, warehouse body and the opening hole of material pipeline between the tank truck and the warehouse body Sampling pipeline and collecting device arranged at the output end of the sampling pipeline, the top of the collecting device is provided with dust remover, the clean gas chamber of the dust remover is connected with the inlet of the exhaust fan of the warehouse body through negative pressure pipeline, and the damper is arranged on the negative pressure pipeline, after the damper is opened, the suction effect generated by the operation of the exhaust fan forms negative pressure in the collecting device, and when the tank truck is discharged to the warehouse body, the material in the discharge process is sampled and collected by the negative pressure in the collecting device and the slight positive pressure in the pipeline from the tank truck to the warehouse body, so that sample reaches the collecting device from the sampling pipeline.

[0007] Wherein, it also includes compressed air cleaning and emptying device with inlet connected with the inlet of the collecting device, for dust cleaning by outputting compressed air before or after sampling of the collecting device and the sampling pipeline.

[0008] Wherein, the dust remover is bag dust collector, and the bag dust collector is gas tank pulse bag dust collector, DMC bag dust collector or gas tank pulse bag dust collector.

[0009] The cloth bag dust collector comprises a shell, a dust removal cloth bag, a bag cage, and a compressed air blowing device, the bag cage is a bag cage with gradually expanded cross-sectional dimensions, the largest cross-sectional end of the bag cage is arranged on a flower plate, the cross-sectional area of the dust removal cloth bag is matched with the cross-sectional area of the bag cage, and the bag cage is connected with the flower plate through a compression plate connected with a locking flange plate on the flower plate.

[0010] The collecting device comprises a transition section and a sample collecting tank arranged at the bottom of the transition section, the dust collector is arranged at the top of the transition section, the transition section comprises a vertical extension section and a converging section, the cross section of the vertical extension section is constant between the top and the bottom, the top is provided with the dust collector, and the bottom is connected with the top of the converging section in a smooth transition mode, the cross section of the converging section gradually decreases from the top to the bottom, and the outlet of the converging section is connected with the sample collecting tank through a sampling output pipeline.

[0011] The collecting device is a cyclone separator structure collecting device, the sample output from the sampling pipeline is separated by the cyclone separator structure collecting device, and the separated powdery material is accumulated at the bottom of the converging section.

[0012] The automatic cleaning powder particle material sampling system comprises a manual feeding valve and an electromagnetic feeding valve arranged on the sampling pipeline, the electromagnetic feeding valve is located between the manual feeding valve and the collecting device, a compressed air exhaust electromagnetic valve arranged on the negative pressure pipeline, a compressed air pipeline arranged between the dust collector and the material pipeline, the connection position of the compressed air pipeline and the material pipeline is located between the connection position of the sampling pipeline and the material pipeline and the bin body, the compressed air pipeline and the sampling pipeline are connected through a cleaning pipeline, the cleaning pipeline is provided with a compressed air inlet electromagnetic valve, the compressed air pipeline between the cleaning pipeline and the dust collector is provided with a compressed air blowing electromagnetic valve, and the outlet of the converging section is provided with a discharge valve.

[0013] The automatic cleaning powder particle material sampling system comprises a manual feeding valve and an electromagnetic feeding valve arranged on the sampling pipeline, the electromagnetic feeding valve is located between the manual feeding valve and the collecting device, a compressed air exhaust electromagnetic valve arranged on the negative pressure pipeline, a compressed air pipeline arranged between the dust collector and the material pipeline, the connection position of the compressed air pipeline and the material pipeline is located between the connection position of the sampling pipeline and the material pipeline and the bin body, the compressed air pipeline and the sampling pipeline are connected through a cleaning pipeline, the cleaning pipeline is provided with a compressed air inlet electromagnetic valve, the compressed air pipeline between the cleaning pipeline and the dust collector is provided with a compressed air blowing electromagnetic valve, and the outlet of the converging section is provided with a discharge valve.

[0014] Compared with the prior art, the automatic cleaning powder particle material sampling system has the following advantages:

[0015] The automatic cleaning powder and particle material sampling system provided by the embodiment of the utility model, through setting sampling pipeline at the opening of material pipeline between tank car and the bin body, setting collecting device at the output end of sampling pipeline, setting dust remover at the top of collecting device, connecting the clean gas chamber of dust remover with the inlet of exhaust fan of bin body through negative pressure pipeline, setting air door on negative pressure pipeline, after opening air door, the suction effect of exhaust fan operation forms negative pressure at collecting device, when tank car unloads to the bin body, through the negative pressure in collecting device and the micro positive pressure in the pipeline from tank car to the bin body, the material in unloading process is sampled and collected, so that the sample reaches collecting device from the sampling pipeline, and through setting dust remover, sampling can be carried out after blowing and cleaning the inside of collecting device, the authenticity and representativeness of sampling can be ensured, the sampling process is not polluted, and the reliability of sampling is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, below will briefly introduce the drawings needed to be used in the embodiments or the prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Fig. 1 The structure schematic view of one embodiment of the automatic cleaning powder and particle material sampling system provided by the embodiment of the utility model is provided.

[0018] Fig. 2 The structure schematic view of cloth bag dust remover of one embodiment of the automatic cleaning powder and particle material sampling system provided by the embodiment of the utility model is provided.

[0019] Wherein, 1-bin body, 10-dust remover, 2-air door, 20-collecting device, 30-sampling pipeline, 5-hand feeding valve, 6-electromagnetic feeding valve, 4-compressed air exhaust electromagnetic valve, 3-compressed air inlet electromagnetic valve, 8-compressed air blowing electromagnetic valve, 7-discharge valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Please refer to Figs. 1-2 , Fig. 1The utility model discloses an automatic cleaning powder particle material sampling system, which comprises a tank truck, a warehouse body and a sampling pipeline arranged at an opening of a material pipeline between the tank truck and the warehouse body. Fig. 2 The utility model discloses an automatic cleaning powder particle material sampling system, which comprises a tank truck, a warehouse body and a sampling pipeline arranged at an opening of a material pipeline between the tank truck and the warehouse body.

[0022] In one embodiment, the automatic cleaning powder particle material sampling system comprises a tank truck, a warehouse body 1, a sampling pipeline 30 arranged at an opening of a material pipeline between the tank truck and the warehouse body 1, and a collecting device 20 arranged at an output end of the sampling pipeline 30. A dust remover 10 is arranged at the top of the collecting device 20. A clean air chamber of the dust remover 10 is connected to an inlet of an exhaust fan of the warehouse body 1 through a negative pressure pipeline. A damper 2 is arranged on the negative pressure pipeline. After the damper 2 is opened, a suction effect generated by the operation of the exhaust fan forms a negative pressure in the collecting device 20. When the tank truck is unloading material into the warehouse body 1, the material in the unloading process is sampled and collected through the negative pressure in the collecting device 20 and a slight positive pressure in the pipeline between the tank truck and the warehouse body 1, so that the sample reaches the collecting device 20 from the sampling pipeline 30.

[0023] By arranging the sampling pipeline 30 at the opening of the material pipeline between the tank truck and the warehouse body 1, arranging the collecting device 20 at the output end of the sampling pipeline 30, arranging the dust remover 10 at the top of the collecting device 20, and connecting the clean air chamber of the dust remover 10 to the inlet of the exhaust fan of the warehouse body 1 through the negative pressure pipeline, the damper 2 is arranged on the negative pressure pipeline. After the damper 2 is opened, the suction effect generated by the operation of the exhaust fan forms a negative pressure in the collecting device 20. When the tank truck is unloading material into the warehouse body 1, the material in the unloading process is sampled and collected through the negative pressure in the collecting device 20 and a slight positive pressure in the pipeline between the tank truck and the warehouse body 1, so that the sample reaches the collecting device 20 from the sampling pipeline 30. At the same time, by arranging the dust remover 10, the inside of the collecting device 20 can be blown clean before sampling, which can ensure the authenticity and representativeness of sampling, the sampling process is pollution-free, and the reliability of sampling is improved.

[0024] In order to further improve the authenticity and representativeness of sampling, in one embodiment, the automatic cleaning powder particle material sampling system further comprises a compressed air cleaning and emptying device connected to the inlet of the collecting device 20, which is used to clean dust in the collecting device 20 and the sampling pipeline through output compressed air before or after sampling.

[0025] The compressed air cleaning and emptying device is used to clean the collecting device 20 and the sampling pipeline by outputting compressed air manually before or after sampling, so that there is no pollutant in the pipeline before sampling, the possibility of pollution during sampling is eliminated, and after sampling, the residual sample pollutant in the sampling pipeline 30 is eliminated, and the reliability of the sampling pipeline 30 is ensured.

[0026] The structure and cleaning process of the compressed air cleaning and emptying device are not limited in the application.

[0027] It should be noted that in the application, the pipeline can also be cleaned by a solution such as an alcohol solution, and then cleaned by compressed air to improve the cleanliness of the pipeline, or other cleaning methods, and the compressed air cleaning can use normal temperature compressed gas or high temperature compressed gas. The use of high temperature compressed gas can effectively evaporate the solution in it and improve the cleaning efficiency. During the cleaning process using compressed air, pulse cleaning, continuous cleaning, or other cleaning methods can be used.

[0028] The structure of the dust collector 10 is not limited in the application. The dust collector 10 is a bag dust collector 10, which is a gas tank pulse bag dust collector 10, a DMC bag dust collector 10, or a gas tank pulse bag dust collector 10, or other types of dust collectors 10.

[0029] The bag dust collector 10 uses compressed air as the cleaning power, releases compressed air in an instant using a pulse blowing mechanism, induces several times of secondary air to be injected at high speed into the filter bag, makes the filter bag swell sharply, and relies on impact vibration and reverse airflow to clean dust.

[0030] The specific structure of the bag dust collector 10 is not limited in the application. In one embodiment, the bag dust collector 10 includes a shell, a dust removal bag, a bag cage, and a compressed air blowing device. The bag cage is a bag cage with gradually expanding cross-sectional dimensions. The largest cross-sectional end of the bag cage is arranged on the flower plate. The cross-sectional area of the dust removal bag is adapted to the cross-sectional dimension of the bag cage. The bag cage is connected to the flower plate through a locking flange plate on the pressing plate to be fastened.

[0031] By using a bag cage with gradually expanding cross-sectional dimensions, the large end is connected to the plate. The bag cage is connected to the flower plate through a locking flange plate on the pressing plate to be fastened. The connection method is simple, the sealing performance is good, and subsequent replacement operations can be performed according to requirements, which is simple to operate.

[0032] The bag dust collector 10 structure in the application includes but is not limited to the above.

[0033] The compressed air blowing device in the application can be arranged in parallel with the compressed air cleaning and emptying device described above to realize mutual cleaning, or one of them can be used to realize reasonable function and reduce the complexity of installation, which is not limited in the application.

[0034] The structure of the transition device in the application is not limited, in order to improve the collection efficiency of the sample, in an embodiment, the collection device 20 includes a transition section and a sample collection tank arranged at the bottom of the transition section, the dust collector 10 is arranged at the top of the transition section, the transition section includes a vertical extension and a converging section, the cross section between the top and the bottom of the vertical extension is constant, the top is provided with the dust collector 10, and the bottom is connected to the top of the converging section smoothly, the cross section of the converging section gradually decreases from the top to the bottom, and the outlet of the converging section is connected to the sample collection tank through a sampling output pipeline.

[0035] By arranging the vertical extension and the converging section, the structure of the dust collector 10 described above can be corresponded, and finally the outlet of the converging section at the bottom is connected to the sample collection tank through a sampling output pipeline, so that the sample can be quickly collected, and the outlet size is small and easy to control.

[0036] The collection device 20 structure in the application includes but is not limited to the above.

[0037] In order to further improve the sample collection effect, in an embodiment, the collection device 20 is a cyclone separator structure collection device 20, the sample output from the sampling pipeline 30 is separated by the cyclone separator structure collection device 20, and the separated powdery material is accumulated at the bottom of the converging section.

[0038] By using the cyclone separator structure collection device 20, the sample output from the sampling pipeline 30 is separated by the cyclone separator structure collection device 20, and the separated powdery material is accumulated at the bottom of the converging section, which improves the sampling efficiency, and at the same time, the different substances have different centrifugal forces and falling speeds under the action of gravity, so that the separation efficiency of the sample and impurities can be improved.

[0039] The specific structure of the cyclone separator structure collection device 20 in the application is not limited.

[0040] In order to further improve the efficiency of automatic control in the sampling process, in an embodiment, the automatic cleaning powder and particle material sampling system further comprises a manual feeding valve 5 arranged in the sampling pipeline 30 and an electromagnetic feeding valve 6 arranged between the manual feeding valve 5 and the collecting device 20, a compressed air exhaust electromagnetic valve 4 arranged in the negative pressure pipeline, and a compressed air pipeline arranged between the dust collector 10 and the material pipeline, wherein the connection between the compressed air pipeline and the material pipeline is located between the connection between the sampling pipeline 30 and the material pipeline and the bin body 1, the compressed air pipeline is connected with the sampling pipeline 30 through a cleaning pipeline, the cleaning pipeline is provided with a compressed air inlet electromagnetic valve 3, the compressed air pipeline between the cleaning pipeline and the dust collector 10 is provided with a compressed air blowing electromagnetic valve 8, and the outlet of the tight part is provided with a discharge valve 7.

[0041] By arranging a plurality of electromagnetic valves and a manual valve, after manual opening confirmation or closing is completed, automatic control of the electromagnetic valve can be realized to realize the sampling and pipeline cleaning process, thereby improving the control efficiency.

[0042] In order to further improve the management efficiency, in an embodiment, the automatic cleaning powder and particle material sampling system further comprises a PLC controller and a display connected with the collecting device 20, the air door 2, the exhaust fan, the dust collector 10, the electromagnetic feeding valve 6, the compressed air exhaust electromagnetic valve 4, the compressed air inlet electromagnetic valve 3, and the compressed air blowing electromagnetic valve 8, for controlling and displaying the operating states of the collecting device 20, the air door 2, the exhaust fan, the dust collector 10, the electromagnetic feeding valve 6, the compressed air exhaust electromagnetic valve 4, the compressed air inlet electromagnetic valve 3, and the compressed air blowing electromagnetic valve 8.

[0043] By arranging a PLC controller and a display, the corresponding device components are controlled and displayed, thereby improving the control efficiency and the management efficiency.

[0044] The collecting device 20 is blown clean by compressed air before sampling, which can ensure the authenticity of the sampling, and the abandoned material after blowing is discharged to the bin body 1 through the pipeline.

[0045] The bag-type dust collector 10 at the top of the collecting device 20 is provided with a compressed air blowing ash removal device. The bag-type dust collector 10 is composed of a shell, a dust removal bag, a bag cage, and a compressed air blowing device. Due to the small space, in order to meet the dust removal bag contact area and facilitate ash removal, the bag cage is arranged in a gradually expanding structure, and the largest size cross section is arranged on the flower plate. The cross-sectional size of the dust removal bag is matched with the size of the bag cage, and the bag cage is fastened through the locking flange plate on the flower plate by a compression plate.

[0046] In one embodiment, the automatic cleaning powder particle material sampling system comprises a sampling pipeline 30, a collecting device 20, a negative pressure pipeline, a bag dust collector 10, a compressed air cleaning and emptying system, and a sample collection tank. The sampling pipeline 30 is arranged on the pipeline through which the tank car unloads to the warehouse body 1, and is connected to the collecting device 20. The collecting device 20 is connected to the inlet of the exhaust fan of the warehouse body 1 through the bag dust collector 10 arranged at the top. The collecting device 20 is of a cyclone separator structure. A manual valve and a sample collection tank are arranged at the bottom of the collecting device 20. The sample collection tank is connected to the pipeline after the manual valve through a flexible connection. The air inlet of the compressed air cleaning and emptying system is arranged at the inlet of the collecting device 20, and the air outlet is arranged at the front of the manual valve of the bottom device and is connected to the top of the warehouse body 1, so that the material blown by the compressed air can be discharged to the warehouse body 1 for collection.

[0047] Two valves are arranged at the inlet of the collecting device 20, i.e., a sampling device manual feeding valve 5 and a sampling device feeding electromagnetic valve. One valve is arranged at the outlet of the collecting device 20, i.e., a collecting device 20 outlet valve 7.

[0048] One compressed air blowing electromagnetic valve 8 is arranged at the dust collector 10 of the collecting device 20. A damper 2 is arranged at the negative pressure pipeline from the clean gas chamber of the dust collector 10 to the exhaust fan at the top of the warehouse, which is used for discharging the exhaust gas of the dust collector 10 to the powder warehouse.

[0049] Two electromagnetic valves are arranged in the compressed air cleaning and emptying system, i.e., a compressed air inlet electromagnetic valve 3 and a compressed air outlet electromagnetic valve 4.

[0050] During sampling, the dust collector 10 is first blown and cleaned (the inlet and outlet valves 7 of the collecting device 20 are closed, the damper 2 from the dust collector 10 to the powder warehouse is closed, the compressed air outlet electromagnetic valve 4 is opened, the dust blowing is opened, and after a delay of 15 seconds, the dust blowing is closed, the compressed air cleaning and emptying of the system are performed to ensure the cleanliness of the sampling system, so that the sampling is true.

[0051] During the blowing process, the inlet and outlet valves 7 of the collecting device 20 are closed, the damper 2 from the dust collector 10 to the powder warehouse is closed, the compressed air outlet electromagnetic valve 4, the sampling electromagnetic valve, and the compressed air inlet electromagnetic valve 3 are sequentially opened. After the cleaning and emptying are completed, the compressed air outlet electromagnetic valve 4, the dust blowing, the sampling electromagnetic valve, and the compressed air inlet electromagnetic valve 3 are closed.

[0052] The sampling process is started. The damper 2 from the dust collector 10 to the powder warehouse is opened, the inlet valve of the collecting device 20 is opened, the sampling is performed by operating the feeding electromagnetic valve, the manual sampling is performed after the sampling is completed, and the dust collector 10 is cleaned and the collecting device 20 is cleaned and emptied again after the sampling is completed, so as to avoid that the material in the collecting device 20 is dampened, blocked, and the system is blocked.

[0053] In summary, the automatic cleaning powder particle material sampling system provided by the embodiments of the present application, by setting the sampling pipeline at the opening of the material pipeline between the tank car and the bin body, setting the collecting device at the output end of the sampling pipeline, setting the dust collector at the top of the collecting device, connecting the clean gas chamber of the dust collector with the inlet of the exhaust fan of the bin body through the negative pressure pipeline, setting the air door on the negative pressure pipeline, after the air door is opened, the suction effect generated by the operation of the exhaust fan forms negative pressure in the collecting device, when the tank car is unloading to the bin body, the material in the unloading process is sampled and collected through the negative pressure in the collecting device and the slight positive pressure in the pipeline from the tank car to the bin body, so that the sample reaches the collecting device from the sampling pipeline, and meanwhile, through the setting of the dust collector, the inside of the collecting device can be blown clean before sampling, the authenticity and representativeness of sampling can be ensured, the sampling process is not polluted, and the reliability of sampling is improved.

[0054] The automatic cleaning powder particle material sampling system provided by the embodiments of the present application is described in detail. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An automatic cleaning of a powder and granule material sampling system, characterized by, The invention relates to a sampling device for a tank truck, a bin body and a sampling pipe arranged at an opening of a material pipe between the tank truck and the bin body, and a collecting device arranged at an outlet end of the sampling pipe, a dust remover is arranged at a top of the collecting device, a clean gas chamber of the dust remover is connected with an inlet of an exhaust fan of the bin body through a negative pressure pipe, a damper is arranged on the negative pressure pipe, after the damper is opened, a suction effect generated by operation of the exhaust fan forms a negative pressure in the collecting device, when the tank truck is unloading to the bin body, a material in an unloading process is sampled and collected through the negative pressure in the collecting device and a slight positive pressure in the pipe between the tank truck and the bin body, so that a sample reaches the collecting device from the sampling pipe, the invention further relates to a compressed air cleaning and emptying device with an air inlet end connected with an inlet of the collecting device, the device is used for dust cleaning of the collecting device and a sampling pipe through output compressed air before or after sampling of the collecting device.

2. The automatic cleaning powder particle material sampling system according to claim 1, wherein, The dust remover is a bag dust remover, the bag dust remover is a gas tank pulse bag dust remover, a DMC bag dust remover or a gas tank pulse bag dust remover.

3. The automatic cleaning powder particle material sampling system according to claim 2, wherein, The bag dust remover comprises a shell, a dust removal bag, a bag cage and a compressed air blowing device, the bag cage is a bag cage with gradually expanded cross section, a largest cross section end of the bag cage is arranged on a flower plate, a cross section size of the dust removal bag is matched with a cross section size of the bag cage, the bag cage is connected with the flower plate after fastening through a locking flange plate on the flower plate by a pressing plate.

4. The automatic cleaning powder and particle material sampling system according to any one of claims 1 to 3, characterized in that, The collecting device comprises a transition section and a sample collecting tank arranged at a bottom of the transition section, the dust remover is arranged at a top of the transition section, the transition section comprises a vertical extension section and a constricted section, a cross section between a top and a bottom of the vertical extension section is constant, the bottom is provided with the dust remover, the top is connected with a top of the constricted section through a smooth transition, a cross section of the constricted section gradually decreases from the top to the bottom, an outlet of the constricted section is connected with the sample collecting tank through a sampling output pipe.

5. The automatic cleaning powder particle material sampling system according to claim 4, wherein, The collecting device is a cyclone separator structure collecting device, after sample output from the sampling pipe is separated by the cyclone separator structure collecting device, separated powdery material is accumulated at a bottom of the constricted section.

6. The automatic cleaning powder particle material sampling system according to claim 5, wherein, The invention further relates to a manual feeding valve and an electromagnetic feeding valve arranged at the sampling pipe, the electromagnetic feeding valve is located between the manual feeding valve and the collecting device, a compressed air exhaust electromagnetic valve arranged at the negative pressure pipe, a compressed air pipe arranged between the dust remover and the material pipe, a connection of the compressed air pipe and the material pipe is located between the sampling pipe and the material pipe and the bin body, the compressed air pipe is connected with the sampling pipe through a cleaning pipe, the cleaning pipe is provided with a compressed air inlet electromagnetic valve, the compressed air pipe between the cleaning pipe and the dust remover is provided with a compressed air blowing electromagnetic valve, an outlet of the constricted section is provided with a discharge valve.

7. The automatic cleaning powder material sampling system according to claim 6, wherein, Also included is a PLC controller and display connected to the collection device, damper, exhaust fan, dust collector, electromagnetic feed valve, compressed air exhaust electromagnetic valve, compressed air intake electromagnetic valve, compressed air blow electromagnetic valve for controlling and displaying the operational status of the collection device, damper, exhaust fan, dust collector, electromagnetic feed valve, compressed air exhaust electromagnetic valve, compressed air intake electromagnetic valve, compressed air blow electromagnetic valve.

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