Airflow blowing type cotton conveying device

Abstract

The present application relates to cotton conveying technical field, especially a kind of airflow blowing type cotton conveying device, define the area that the cotton conveying pipeline is easily blocked as easily blocked section, the easily blocked section is equipped with blockage detection equipment, the cotton conveying pipeline is located easily blocked section and is opened along the direction of cotton conveying with several air inlets that can be opened and closed one by one, the first opening and the second opening are communicated and installed with temporary pipeline, the airflow that blows out through the temporary pipeline can make the area of the cotton conveying pipeline between the second opening and easily blocked section form negative pressure channel.The device is set in the corresponding temporary pipeline in easily blocked section, and the airflow that blows in temporary pipeline forms negative pressure area downstream of easily blocked section, and under the action of negative pressure suction, the cotton of easily blocked section is pumped to the downstream of second opening little by little, with the cotton of easily blocked section being gradually sucked away, make easily blocked section gradually be dredged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cotton conveying, in particular to an air flow blowing type cotton conveying device. BACKGROUND

[0002] At present, the research on the flow characteristics of cotton in the conveying pipeline of the cotton picker is less, and the numerical simulation research on the cotton pneumatic conveying device is less. Different materials have different gas material characteristics when using pneumatic conveying, and the flow characteristics in the pipeline and the simulation model for simulating the pipeline flow characteristics are very different. Therefore, it is very important to select a suitable conveying device. The main types of cotton pneumatic conveying device are suction type, blowing type and composite type.

[0003] The suction type pneumatic conveying device is: air inlet-material-conveying pipe-separator-fan. The characteristic of this form is that the fan is installed downstream of the conveying pipe and the separator, the gas flow in the pipe is negative pressure pipe flow, and the negative pressure energy is used to complete the conveying of the material. This conveying method is suitable for centralized conveying from multiple places to one place, and there is no dust flying in the pipe gap during the conveying process, the material does not pass through the fan, and the conveying distance is generally not more than 40m. Moreover, the sealing of the pipe joint needs to be strengthened to reduce the air leakage of the negative pressure pipe;

[0004] The blowing type pneumatic conveying device is: fan-material-conveying pipe-separator. The characteristic of this form is that the fan is installed upstream of the conveying pipe and the separator, the gas flow in the pipe is positive pressure pipe flow, and the energy of the positive pressure air is used to complete the conveying. The material does not pass through the fan, which can avoid the wear of the material on the fan, and the conveying distance can be lengthened. This form is suitable for dispersed conveying from one place to multiple places.

[0005] The composite type pneumatic conveying device is: there are both positive pressure and negative pressure in the same conveying system, which utilizes the advantages of two different systems to complete the relatively complex conveying. The composite system can be a pressure-conveying type or a conveying-pressing type conveying combination system.

[0006] The longer the pipe length and the more the bends, the greater the friction resistance of the gas flowing through the pipe, which leads to the decrease of the gas pressure and the blockage of the cotton conveying pipe. SUMMARY

[0007] The purpose of the present application is to solve the problem of blockage of the cotton conveying pipe, and an air flow blowing type cotton conveying device is provided.

[0008] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0009] The application discloses an air flow blowing type cotton conveying device, which comprises a cotton conveying pipe, a fan arranged at the front end of the cotton conveying pipe, a cotton feeding device capable of feeding cotton to the cotton conveying pipe, a blocked section defined as a section of the cotton conveying pipe which is prone to be blocked, a blocking detection device arranged at the blocked section, a plurality of air inlet holes capable of being opened and closed one by one and arranged at the blocked section along the cotton conveying direction, a first opening arranged at the upstream of the blocked section, a second opening arranged at the downstream of the blocked section, and a temporary pipe arranged between the first opening and the second opening and in communication with the first opening and the second opening, wherein the air flow blown out of the temporary pipe can form a negative pressure channel in the section of the cotton conveying pipe between the second opening and the blocked section.

[0010] The first opening is provided with a first switch valve, the section between the first opening and the upstream of the blocked section is provided with a third switch valve, and the second opening is provided with a second switch valve.

[0011] The air flow blown out of the temporary pipe is inclined to be blown into the cotton conveying pipe along the direction of the cotton conveying pipe.

[0012] Each of the air inlet holes is provided with a blocking block, and the conveying device comprises a power device capable of driving the blocking blocks to open or close the air inlet holes one by one.

[0013] The blocking block is a ferromagnetic plug, a tension spring is connected between the ferromagnetic plug and the cotton conveying pipe, the power device comprises a walking track fixedly arranged opposite to the cotton conveying pipe, the walking track is arranged along the direction of the blocked section of the cotton conveying pipe, an electric walking device is arranged on the walking track, a magnet is fixedly arranged on the electric walking device, and the magnet can magnetically attract the ferromagnetic plug to open the air inlet hole when the magnet passes through the ferromagnetic plug.

[0014] The magnet is a permanent magnet or an electromagnet.

[0015] The blocking detection device comprises a first air pressure sensor and a second air pressure sensor arranged in the cotton conveying pipe, the second air pressure sensor is arranged at the upstream of the blocked section, and the first air pressure sensor is arranged at the downstream of the blocked section.

[0016] The air flow blowing type cotton conveying device has the beneficial effects that the corresponding temporary pipe is arranged at the blocked section, the air flow blown out of the temporary pipe forms a negative pressure area at the downstream of the blocked section, and the cotton in the blocked section is gradually sucked to the downstream of the second opening under the negative pressure, so that the blocked section is gradually dredged as the cotton in the blocked section is gradually sucked away. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of the application;

[0018] Figure 2 Structure diagram of the temporary pipeline in the cotton conveying pipeline.

[0019] In the figure: first opening 1, first switch valve 2, temporary pipeline 3, second switch valve 4, second opening 5, first air pressure sensor 6, negative pressure channel 7, air inlet hole 8, electric walking device 9, magnet 10, ferromagnetic plug 11, tension spring 12, walking track 13, easily blocked section 14, second air pressure sensor 15, third switch valve 16. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0021] Reference Figures 1-2 A cotton conveying device of air flow blowing type, comprising a cotton conveying pipeline, a fan located at the front end of the cotton conveying pipeline, and a cotton feeding device capable of feeding cotton to the cotton conveying pipeline, wherein an area of the cotton conveying pipeline that is prone to be blocked is defined as an easily blocked section 14, some pipeline sections that are frequently blocked in a factory are the easily blocked section 14, such as a bending section, a section with a narrowed diameter, a final conveying section, etc., the easily blocked section 14 is provided with a blockage detection device, the cotton conveying pipeline located at the easily blocked section 14 is provided with a plurality of air inlet holes 8 capable of being opened and closed one by one along the direction of cotton conveying, the cotton conveying pipeline located upstream of the easily blocked section 14 is provided with a first opening 1, and the cotton conveying pipeline located downstream of the easily blocked section 14 is provided with a second opening 5, a temporary pipeline 3 is installed in communication between the first opening 1 and the second opening 5, and the air flow blown out through the temporary pipeline 3 can form a negative pressure channel 7 in the area of the cotton conveying pipeline between the second opening 5 and the easily blocked section 14.

[0022] In order to facilitate the control of the flow direction of the air flow, the first opening 1 is provided with a first switch valve 2, the first opening 1 and the upstream of the easily blocked section 14 are provided with a third switch valve 16, and the second opening 5 is provided with a second switch valve 4.

[0023] Reference Figure 1When the clogging detection device detects that a certain clogging-prone section 14 is clogged, the third switch valve 16 is closed, and the first switch valve 2 and the second switch valve 4 are opened, so that the airflow drives the cotton through the first opening 1 into the temporary pipeline 3, and from the temporary pipeline 3 to the second opening 5 back into the cotton conveying pipeline, and the airflow blown out of the temporary pipeline 3 into the inside of the cotton conveying pipeline, the fast-flowing airflow constantly sucks away the air around the second opening 5, so that the channel between the clogging-prone section 14 and the second opening 5 forms a negative pressure channel 7, and then the air inlets 8 are opened one by one from the downstream to the upstream of the clogging-prone section 14, because the channel from the clogging-prone section 14 to the second opening 5 is in a negative pressure state, as the air inlets 8 are opened one by one, the external airflow blows towards the cotton in the clogging-prone section 14 through the air inlets 8, and under the action of the negative pressure suction, the cotton in the clogging-prone section 14 is gradually sucked to the downstream of the second opening 5, and as the cotton in the clogging-prone section 14 is gradually sucked away, the clogging-prone section 14 is gradually unblocked, and after unblocking, the first switch valve 2 and the second switch valve 4 are closed, and the third switch valve 16 is opened, so that the temporary pipeline 3 is closed again, and the cotton conveying pipeline returns to the normal operating state.

[0024] As an embodiment, the airflow blown out of the temporary pipeline 3 is inclined to blow into the cotton conveying pipeline in the direction of the cotton conveying pipeline, and the airflow of the second opening 5 is inclined to blow into the cotton conveying pipeline, which is beneficial to form greater negative pressure suction in the area of the negative pressure channel 7.

[0025] As an embodiment, a blocking block is installed in each air inlet 8, and the conveying device includes a power device capable of driving the blocking block to open or close the air inlet 8 one by one; the blocking block is a ferromagnetic plug 11, and a tension spring 12 is connected between the ferromagnetic plug 11 and the cotton conveying pipeline, and when the magnetic force disappears, the tension spring 12 drives the ferromagnetic plug 11 to close the air inlet 8 again, the power device includes a walking track 13 fixedly arranged opposite to the cotton conveying pipeline, the walking track 13 is arranged in the direction of the clogging-prone section 14 of the cotton conveying pipeline, an electric walking device 9 is installed on the walking track 13, a magnet 10 is fixedly installed on the electric walking device 9, and when the magnet 10 passes through the ferromagnetic plug 11, the magnet 10 can magnetically attract the ferromagnetic plug 11 to open the air inlet 8.

[0026] The electric walking device 9 and the magnet 10 are located downstream of the easily clogged section 14 in the initial state. After detecting that the easily clogged section 14 is clogged, the third on-off valve 16 is closed, and the first on-off valve 2 and the second on-off valve 4 are opened, so that the airflow drives the cotton to pass through the first opening 1 into the temporary pipeline 3, and then from the temporary pipeline 3 to pass through the easily clogged section 14 and return to the cotton feeding pipeline from the second opening 5. When the airflow blown from the temporary pipeline 3 enters the inside of the cotton feeding pipeline, the airflow flowing fast makes the air around the second opening 5 be continuously sucked away, so that the passage between the easily clogged section 14 and the second opening 5 forms the negative pressure passage 7. At the same time, the electric walking device 9 is started to drive the magnet 10 to move slowly from the downstream to the upstream. When the magnet 10 moves to the position right above the corresponding ferromagnetic plug 11, the ferromagnetic plug 11 is moved upward under the action of the magnetic force, so that the corresponding air inlet hole 8 is opened. The airflow from outside passes through the clogged cotton and drives the cotton to enter the cotton feeding pipeline downstream of the second opening 5. With the movement of the magnet 10, the air inlet holes 8 are opened and closed one by one, so that the clogged area is gradually dredged.

[0027] The magnet 10 is a permanent magnet or an electromagnet.

[0028] As a detection method for detecting whether the easily clogged section 14 is in a clogged state, the clogging detection device includes a first air pressure sensor 6 and a second air pressure sensor 15 installed in the cotton feeding pipeline. The second air pressure sensor 15 is located upstream of the easily clogged section 14, and the first air pressure sensor 6 is located downstream of the easily clogged section 14. When the difference between the first air pressure sensor 6 and the second air pressure sensor 15 is greater than a set threshold value, it is judged that the easily clogged section 14 is clogged, and then the above-mentioned dredging step is started. Of course, other detection devices for judging whether the cotton feeding pipeline is clogged in the prior art can also be used, as long as the above-mentioned functions of the present application can be realized.

[0029] Reference Figure 2 The dredging devices of a plurality of easily clogged sections 14 can be connected to one controller, and the operation of the related dredging devices can be controlled by the controller.

[0030] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can obtain technical solutions, concepts and designs within the technical range disclosed by the present application according to the technical solutions and the inventive concept of the present application, and the obtained technical solutions, concepts and designs should be covered within the protection scope of the present application.

Claims

1. A pneumatic cotton conveying device, comprising a cotton feeding pipe, a fan located at the front end of the cotton feeding pipe, and a cotton feeding device capable of feeding cotton into the cotton feeding pipe, characterized in that, The area of ​​the cotton delivery pipe that is prone to blockage is defined as the blockage section (14). The blockage section (14) is equipped with a blockage detection device. The cotton delivery pipe is located in the blockage section (14) and has several air inlets (8) that can be opened and closed one by one along the cotton delivery direction. The cotton delivery pipe has a first opening (1) upstream of the blockage section (14) and a second opening (5) downstream of the blockage section (14). A temporary pipe (3) is installed between the first opening (1) and the second opening (5). The airflow blown out through the temporary pipe (3) can make the area between the second opening (5) and the blockage section (14) of the cotton delivery pipe form a negative pressure channel (7).

2. The airflow blowing cotton conveying device according to claim 1, characterized in that, The first opening (1) is equipped with a first switching valve (2), a third switching valve (16) is installed between the first opening (1) and the upstream of the easily blocked section (14), and the second opening (5) is equipped with a second switching valve (4).

3. The airflow blowing type cotton conveying device according to claim 1, characterized in that, The airflow blown out by the temporary pipe (3) is inclined and blown into the cotton delivery pipe along the direction of the cotton delivery pipe.

4. The airflow blowing type cotton conveying device according to claim 1, characterized in that, Each of the air inlets (8) is equipped with a sealing block, and the conveying device includes a power device that can drive the sealing blocks to open or close the air inlets (8) one by one.

5. The airflow blowing type cotton conveying device according to claim 4, characterized in that, The sealing block is a ferromagnetic plug (11). A tension spring (12) is connected between the ferromagnetic plug (11) and the cotton feeding pipe. The power device includes a walking track (13) that is fixedly arranged relative to the cotton feeding pipe. The walking track (13) is arranged along the direction of the easily blocked section (14) of the cotton feeding pipe. An electric walking device (9) is installed on the walking track (13). A magnet (10) is fixedly installed on the electric walking device (9). When the magnet (10) passes the ferromagnetic plug (11), it can magnetically attract the ferromagnetic plug (11) to open the air inlet (8).

6. The airflow blowing type cotton conveying device according to claim 5, characterized in that, The magnet (10) is a permanent magnet or an electromagnet.

7. A pneumatic cotton conveying device according to any one of claims 1-6, characterized in that, The blockage detection device includes a first air pressure sensor (6) and a second air pressure sensor (15) installed in the cotton feeding pipe. The second air pressure sensor (15) is located upstream of the blockage-prone section (14), and the first air pressure sensor (6) is located downstream of the blockage-prone section (14).

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