A pipeline bidirectional pneumatic feeder, positioning detection method and use method thereof

Abstract

The application discloses a pipeline bidirectional pneumatic feeder, a positioning detection method and a use method thereof, and comprises a supporting sleeve, which is centrally symmetrical in length and has a first stepped hole, a second stepped hole and a third stepped hole; the second stepped hole is provided with an air inlet hole connected with a high-pressure air source; the third stepped hole is a taper angle with a necking towards a symmetry center; one end of a feeding pipe close to the symmetry center is a tapered structure and is matched with the third stepped hole, and the middle part is sealingly and slidably connected with the first stepped hole; when the feeding pipe moves axially through a driving assembly and one end thereof is sealingly contacted with the third stepped hole, the second stepped hole and the tapered structure of the feeding pipe form a sealed inner cavity; when the feeding pipe moves axially and one end thereof is separated from the third stepped hole, the inner cavity is communicated with the third stepped hole. The application has the advantages of simple structure, convenient operation, realization of bidirectional conveying of pipeline air force, suitability for different conveying environments, guarantee of stability of the same air force conveying before and after switching, and effective prevention of material blockage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipeline conveying, in particular to a pipeline bidirectional pneumatic feeder, a positioning detection method and a use method thereof. BACKGROUND

[0002] Pipeline pneumatic conveying is a process of driving the movement of powder materials in the pipeline by using the energy of airflow as the conveying medium in a sealed pipeline, which is suitable for powder conveying in food, chemical industry and other industries; the corresponding pneumatic conveying system includes air source, feeding system, conveying pipeline, bin pump system and other parts.

[0003] The commonly used conveying mode is one-way feeding, that is, the air source is connected with the conveying pipeline, and the material is conveyed in a single direction by positive pressure or negative pressure. This mode cannot be adjusted to meet the demand of bidirectional feeding. In addition, some feeders are improved on the basis of one-way feeding to realize bidirectional conveying, that is, a pair of valves are used to switch. However, the switching process is complicated, and there is a problem of material blockage in the conveying system before and after switching. SUMMARY

[0004] The present application aims to provide a pipeline bidirectional pneumatic feeder, which is simple in structure, convenient to operate, realizes bidirectional conveying of pipeline air, is suitable for different conveying environments, and can ensure the stability of the same air conveying before and after switching, effectively avoiding material blockage.

[0005] To achieve the above-mentioned purpose, the pipeline bidirectional pneumatic feeder comprises:

[0006] The support sleeve has three coaxial first, second and third stepped holes with gradually decreasing diameters at the length center;

[0007] The second stepped hole is provided with an air inlet hole connected with the high-pressure air source, and the third stepped hole is a tapered angle towards the center of symmetry;

[0008] The feeding pipe is a pair of pipes symmetrically arranged at both ends of the support sleeve and slidably sealed at the other end of the conveying pipeline;

[0009] One end of each feeding pipe near the center of symmetry is a conical structure matched with the third stepped hole, and the middle part is sealed and slid with the first stepped hole; when the feeding pipe moves axially by the driving assembly, one end is in sealing contact with the third stepped hole, and the second stepped hole and the conical structure of the feeding pipe form a sealed inner cavity; when the feeding pipe moves axially, one end is separated from the third stepped hole, and the inner cavity is communicated with the third stepped hole.

[0010] Further, the feeding pipe is threadedly connected with the inner wall of the first stepped hole of the support sleeve.

[0011] The driving assembly has a motor fixed on the supporting sleeve, a driving wheel connected with the output end of the motor, and a driven wheel fixed outside the feeding pipe;

[0012] The driving wheel and the driven wheel are in meshing connection.

[0013] Further, the first sensor is arranged at the end of the feeding pipe, and the second sensor is arranged in the first stepped hole;

[0014] The first sensor and the second sensor are both used for detecting the axial movement position of the feeding pipe and are connected with the controller;

[0015] The controller controls the action of the motor.

[0016] Further, the feeding pipe is provided with a limiting ring connected in a threaded mode outside;

[0017] When one end of the feeding pipe is in sealing contact with the third stepped hole, the limiting ring is in contact with the end side of the supporting sleeve, and at this time, the outside of the feeding pipe is kept a certain distance from the second sensor.

[0018] Further, the contact position between the tapered end of the feeding pipe and the third stepped hole is an alloy port.

[0019] The angle between the taper of the end of the feeding pipe and the horizontal plane is 10°-20°.

[0020] Further, the driving wheel and the driven wheel are both helical gears.

[0021] A plurality of sliding sealing rings are arranged between the feeding pipe and the feeding pipe.

[0022] The purpose of the present application is also to provide a positioning detection method of a pipeline bidirectional pneumatic feeder, which records the flow at the air inlet hole through the flow meter and measures the flow at the feeding pipe in real time, selects the position with the maximum real-time flow or the position with the maximum flow difference as the best feeding position, and is suitable for different density gases or different feeding requirements.

[0023] A positioning detection method of a pipeline bidirectional pneumatic feeder, specifically comprising the following steps:

[0024] S1, the left and right feeding pipes are correspondingly connected to the left and right feeding pipes, respectively, and the left and right motors are driven to make the left and right cavities in a closed state;

[0025] S2, when testing the material conveying from left to right, the left conveying pipe is communicated with the atmosphere, the right conveying pipe is connected with the flowmeter first and then communicated with the atmosphere, the high-pressure gas is steadily introduced from the left gas inlet hole, the flow q1 is recorded by the flowmeter at the left gas inlet hole, then the controller controls the left motor to start, the left feeding pipe shaft is moved axially by the driving wheel and the driven wheel until the left feeding pipe shaft moves to the leftmost position, at this time, the left cavity is gradually opened;

[0026] The flow Q1 of the right conveying pipe is measured in real time, and the real-time flow difference AQ1 is obtained according to the formula q1-Q1, when the flow Q1 and AQ1 reach the maximum value, the axial movement position of the left feeding pipe shaft or the rotation angle of the left driven wheel is recorded;

[0027] S3, when testing the material conveying from right to left, the right conveying pipe is communicated with the atmosphere, the left conveying pipe is connected with the flowmeter first and then communicated with the atmosphere, the high-pressure gas is steadily introduced from the right gas inlet hole, the flow q2 is recorded by the flowmeter at the right gas inlet hole, then the controller controls the right motor to start, the right feeding pipe shaft is moved axially by the driving wheel and the driven wheel until the right feeding pipe shaft moves to the rightmost position, at this time, the right cavity is gradually opened;

[0028] The flow Q2 of the left conveying pipe is measured in real time, and the real-time flow difference AQ2 is obtained according to the formula q2-Q2, when the flow Q2 and AQ2 reach the maximum value, the axial movement position of the right feeding pipe shaft or the rotation angle of the right driven wheel is recorded;

[0029] S4, for different density gases or different conveying requirements, the real-time flow maximum position or the flow difference maximum position is selected as the best conveying position.

[0030] The application also aims to provide a use method of the pipeline bidirectional pneumatic feeder, the feeding pipe is axially moved under the action of the driving assembly, the inner cavity formed by the second stepped hole of the supporting sleeve and the tapered structure of the feeding pipe is opened and closed, the bidirectional switching of the corresponding pipeline pneumatic conveying is realized, and the pipeline bidirectional pneumatic feeder is suitable for different conveying environments.

[0031] A use method of a pipeline bidirectional pneumatic feeder, specifically comprising the following steps:

[0032] S1, the left and right feeding pipes are connected with the conveying pipes in a sealed manner and kept axially movable;

[0033] When the conveying pipe is in normal use, the left and right motors are started, and the corresponding driving wheels and driven wheels drive the feeding pipes to move axially towards the symmetrical center axis, and the second sensor detects the positioning, so that the tapered structure of the left and right feeding pipes is in complete contact and sealing with the third stepped hole, at this time, the second stepped hole and the outside of the feeding pipe form a sealed inner cavity, and the high-pressure gas source connected with the air inlet hole cannot be passed in, and the pipe bidirectional pneumatic feeder is only used as a venturi tube or a variable diameter pipe;

[0034] The material is conveyed from one side of the conveying pipe through the left feeding pipe or the right feeding pipe, and then enters the other side of the conveying pipe for normal conveying;

[0035] S2, when unidirectional conveying to the right is performed, the tapered structure of the right feeding pipe is in complete contact and sealing with the third stepped hole, the left motor is started to drive the left feeding pipe to move axially away from the symmetrical center axis, and the corresponding first sensor detects the positioning, the tapered structure of the left feeding pipe is separated from the third stepped hole, and the inner cavity is in an open state, high-pressure gas enters from the air inlet hole and the inner cavity, and the high-pressure gas is unidirectionally conveyed from left to right along the tapered outer wall;

[0036] S3, when unidirectional conveying to the left is performed, the tapered structure of the left feeding pipe is in complete contact and sealing with the third stepped hole, the right motor is started to drive the right feeding pipe to move axially away from the symmetrical center axis, and the corresponding first sensor detects the positioning, the tapered structure of the right feeding pipe is separated from the third stepped hole, and the inner cavity is in an open state, high-pressure gas enters from the air inlet hole and the inner cavity, and the high-pressure gas is unidirectionally conveyed from right to left along the tapered outer wall;

[0037] S4, according to the positioning detection method of the pipe bidirectional pneumatic feeder, when unidirectional conveying is performed, the driven wheel drives the feeding pipe to rotate at an angle, positions the axial movement position of the corresponding feeding pipe, and selects the position with the maximum real-time flow or the position with the maximum flow difference as the best conveying position according to different working conditions and use environments.

[0038] Compared with the prior art, the pipe bidirectional pneumatic feeder can realize bidirectional switching of pneumatic conveying of the corresponding pipe by moving a pair of feeding pipes axially under the action of a driving assembly, so that the inner cavity formed by the second stepped hole and the tapered structure of the feeding pipe on the supporting sleeve is opened and closed, high-pressure gas can enter the feeding pipe from the air inlet and the inner cavity, and the pipe bidirectional pneumatic feeder is suitable for different conveying environments;

[0039] Since the feeding pipe is controlled by the controller to drive the motor to drive the driving wheel and the driven wheel to move axially, the overall operation is simple, a pair of feeding pipes are symmetrically arranged, and the conveying forms are the same, so that the stability of pneumatic conveying before and after reversing can be ensured; when the inner cavity and the third stepped hole are in an open state, the high-pressure gas is unidirectionally conveyed along the tapered outer wall, which effectively avoids material blockage and airflow reversal;

[0040] The high-pressure gas enters from the other inner cavity, the flow rate is measured in real time by recording the flow meter at the conveying pipeline, and the flow rate at the gas inlet hole is measured, the axial position or the rotation angle of the feeding pipe corresponding to the maximum position of the real-time flow rate or the maximum position of the flow rate difference is selected as the optimal conveying position, which can be applied to different density gases or different conveying environments. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is the overall structure schematic diagram of the present application;

[0042] Figure 2 is the schematic diagram of the left part of the symmetry center in the present application;

[0043] Figure 3 is the schematic diagram of the support sleeve structure in the present application;

[0044] Figure 4 is the schematic diagram of the sealing contact between the feeding pipe and the third stepped hole in the present application;

[0045] Figure 5 is Figure 2 is the local enlarged schematic diagram of A in the present application;

[0046] Figure 6 is the schematic diagram of the relationship between the rotation angle of the feeding pipe and the gas in and out amount when the driving assembly works in the embodiment of the present application;

[0047] Figure 7 is the schematic diagram of the relationship between the rotation angle of the feeding pipe and the flow rate difference when the driving assembly works in the embodiment of the present application.

[0048] In the figure, 10, conveying pipeline;

[0049] 20, feeding pipe, 21, sealing ring, 22, conical structure, 23, alloy port, 24, limiting ring;

[0050] 30, support sleeve, 31, gas inlet hole, 32, inner cavity, 33, first stepped hole, 34, second stepped hole, 35, third stepped hole;

[0051] 40, driving assembly, 41, motor, 42, driving wheel, 43, driven wheel;

[0052] 50, support shell;

[0053] 61, first sensor, 62, second sensor. DETAILED DESCRIPTION

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] like Figures 1 to 4 As shown, this bidirectional pneumatic feeder for pipelines includes:

[0056] The support sleeve 30 has three coaxial stepped holes 33, 34, and 35 with gradually decreasing diameters, symmetrical about the length center.

[0057] The second step hole 34 is provided with an air inlet 31 connected to the high-pressure air source, and the third step hole 35 is a cone angle that narrows towards the center of symmetry.

[0058] The feeding pipes 20 are a pair and are symmetrically arranged at both ends of the support sleeve 30;

[0059] Each feed tube 20 has a tapered structure 22 at one end near the center of symmetry, which matches the third stepped hole 35, and the middle part slides in a sealed manner with the first stepped hole 33; when the feed tube 20 moves axially through the drive assembly 40 and one end is in sealed contact with the third stepped hole 35, the second stepped hole 34 and the tapered structure 22 of the feed tube 20 form a sealed inner cavity 32; when the feed tube 20 moves axially and one end is disengaged from the third stepped hole 35, the inner cavity 32 communicates with the third stepped hole 35.

[0060] The other end of the feeding pipe 20 is slidably sealed on the conveying pipe 10;

[0061] Specifically, the support sleeve 30 is used for support and connection, and the air inlet 31 on it can use the same high-pressure air source. For example, the air inlet 31 is connected to the high-pressure air source through an air nozzle and an air inlet pipe, and a flow valve for controlling the air intake is provided on the air inlet pipe.

[0062] One end of the feeding pipe 20 is connected to the conveying pipe 10 and the other end is connected to the support sleeve 30. This means that the axial movement of the feeding pipe 20 can maintain the sealing of the connection, for example, through the contact of the sealing ring 21.

[0063] For ease of description, such as Figure 1 As shown, a pair of feed pipes 20mm in diameter are symmetrically arranged for illustration.

[0064] The bidirectional pneumatic feeder is installed on the conveying pipe 10, that is, the left and right feed pipes 20 move axially and are sealed to the conveying pipe 10, and the sealing movement between them is located at both ends of the support sleeve 30, and each feed pipe 20 is moved by the drive assembly 40.

[0065] When the conveying pipe 10 is normally used, the driving assembly 40 controls the left and right feeding pipes 20 to move towards the symmetry center, at this time the tapered structure 22 of the feeding pipe 20 is in contact with the third stepped hole 35 to seal, that is, the second stepped hole 34 forms a sealed inner cavity 32 with the outside of the feeding pipe 20, and the high-pressure gas source connected with the air inlet hole 31 cannot pass in, the pipe bidirectional pneumatic feeder is only used as a venturi or a reducer at this time, and the material can enter the left feeding pipe 20 or the right feeding pipe 20 from one side of the conveying pipe 10 and then be discharged from the other end of the conveying pipe 10, so that the normal conveying of the material is realized;

[0066] When the unidirectional conveying is carried out, taking the conveying of the material from left to right as an example for description, the right driving assembly 40 is started to drive the right feeding pipe 20 to move towards the symmetry center, so that the tapered structure 22 at the left end of the right feeding pipe 20 is in contact with the third stepped hole 35 to seal, the right inner cavity 32 is closed, and the high-pressure gas source cannot enter the feeding pipe 20; the left driving assembly 40 is started to drive the left feeding pipe 20 to move away from the symmetry center, at this time the tapered structure 22 of the left feeding pipe 20 is separated from the third stepped hole 35, and the inner cavity 32 is in an open state, the high-pressure gas enters from the air inlet hole 31 and the inner cavity 32, and under the action of the tapered structure 22 of the left feeding pipe 20, the high-pressure gas is conveyed from left to right along the tapered outer wall, so that the accelerated conveying of the material is realized;

[0067] Correspondingly, when the left feeding pipe 20 moves towards the symmetry center to close the inner cavity 32 and the right feeding pipe 20 moves away from the symmetry center to open the inner cavity 32, the high-pressure gas is conveyed from right to left along the tapered outer wall, so that the accelerated conveying of the material is realized;

[0068] The pipe bidirectional pneumatic feeder is axially moved by a pair of feeding pipes 20 under the action of the driving assembly 40, so that the inner cavity 32 formed by the second stepped hole 34 of the supporting sleeve 30 and the tapered structure 22 of the feeding pipe 20 is opened and closed, the bidirectional switching of the corresponding pipe pneumatic conveying is realized, it is suitable for different conveying environments, and the whole operation is simple, and the stability of the conveying of the same gas before and after the switching can be ensured; when the inner cavity 32 and the third stepped hole 35 are in the open state, the high-pressure gas is unidirectionally conveyed along the tapered outer wall, so that the material blockage is effectively avoided.

[0069] As shown in Figure 2 , Figure 4 , preferably, the feeding pipe 20 is threadedly connected with the inner wall of the first stepped hole 33 of the supporting sleeve 30;

[0070] The driving assembly 40 has a motor 41 fixed on the supporting sleeve 30, a driving wheel 42 connected with the output end of the motor 41, and a driven wheel 43 fixed on the outside of the feeding pipe 20;

[0071] The driving wheel 42 and the driven wheel 43 are kept in engagement connection;

[0072] Specifically, the motor 41 is fixedly installed outside the support sleeve 30, and the output end is connected with the driving wheel 42 through the reducer, that is, the driving wheel 42 and the output shaft of the reducer are positioned and fixed by using the positioning end cover, and the power is transmitted by using the flat key between the assemblies;

[0073] The driving wheel 42 is engaged with the driven wheel 43, preferably, the number of teeth of the driving wheel 42 is less than that of the driven wheel 43, the driven wheel 43 is fixed on the feeding pipe 20 for linkage, and the driven wheel 43 and the shaft shoulder of the feeding pipe 20 can be positioned and fixed by using the retaining ring;

[0074] The motor 41 is started, the feeding pipe 20 is driven to rotate by the driving wheel 42 and the driven wheel 43, so that the feeding pipe 20 is axially moved on the support sleeve 30 in a threaded manner; in addition, the motor 41, the reducer, and the driving wheel 42 are sealed by the support shell 50 installed on the conveying pipeline 10 and the support sleeve 30 through bolts.

[0075] As shown in Figure 2 Further, the first sensor 61 is arranged at the end of the conveying pipeline 10, and the second sensor 62 is arranged in the first stepped hole 33;

[0076] The first sensor 61 and the second sensor 62 are both used for detecting the axial movement position of the feeding pipe 20 and are connected with the controller;

[0077] The controller controls the action of the motor 41;

[0078] Specifically, the first sensor 61 and the second sensor 62 can be distance sensors or photoelectric sensors, the controller receives the position signal of the feeding pipe 20, and controls the action of the motor 41, which includes starting and stopping, forward and reverse rotation, and speed adjustment;

[0079] The second sensor 62 is located in the first stepped hole 33, and a through hole can be arranged on the support sleeve 30 for leading out the lead of the second sensor 62, and the through hole is sealed to avoid backflow of high-pressure gas from the through hole;

[0080] When the feeding pipe 20 moves towards the center of symmetry, the second sensor 62 detects that the feeding pipe 20 reaches the appropriate position, that is, the end of the feeding pipe 20 contacts the third stepped hole 35 to be completely sealed, and the controller receives the signal to control the motor 41 to stop rotating; correspondingly, when the feeding pipe 20 moves away from the center of symmetry, the first sensor 61 detects that the feeding pipe 20 reaches the appropriate position, that is, the driven wheel 43 on the feeding pipe 20 approaches the conveying pipeline 10 to make the inner cavity 32 completely open, and the controller receives the signal to control the motor 41 to stop rotating.

[0081] As shown in Figure 5As shown, further, the outer side of the feeding pipe 20 is provided with a threaded limiting ring 24, when one end of the feeding pipe 20 is in sealing contact with the third stepped hole 35, the limiting ring 24 is in contact with the end side of the supporting sleeve 30, at this time, the outer side of the feeding pipe 20 is away from the second sensor 62 by a certain distance;

[0082] Specifically, the position of the limiting ring 24 is adjusted to position the feeding pipe 20 to the symmetric center position, when one end of the feeding pipe 20 is in sealing contact with the third stepped hole 35, the limiting ring 24 is in contact with the end side of the supporting sleeve 30, at this time, the outer side of the feeding pipe 20 is away from the second sensor 62 by a certain distance, which can effectively protect the second sensor 62 from being extruded by the feeding pipe 20.

[0083] Further, the driving wheel 42 and the driven wheel 43 are bevel gears;

[0084] A plurality of sliding sealing rings 21 are arranged between the conveying pipe 10 and the feeding pipe 20;

[0085] Specifically, the purpose of using bevel gears is that when the driving wheel 42 drives the driven wheel 43 to rotate, the driven wheel 43 can bear a certain axial force, and since the feeding pipe 20 is threadedly connected with the supporting sleeve 30, the feeding pipe 20 can better move axially under the action of the driving assembly 40;

[0086] The sealing ring 21 can ensure the sealing of the connection between the feeding pipe 20 and the supporting sleeve 30, so as to avoid leakage of materials and high-pressure gas when the feeding pipe 20 rotates and moves axially. It is to be explained that the sealing ring 21 is only an embodiment, and in actual assembly, the sealing ring 21 can be installed at other positions.

[0087] As shown in the figure, Figure 4 Further, the tapered end of the feeding pipe 20 is in contact with the alloy port 23 at the position of the third stepped hole 35;

[0088] The angle between the tapered end of the feeding pipe 20 and the horizontal plane is 10°-20°, preferably 15°;

[0089] The alloy port 23 is welded to the tapered structure 22 of the feeding pipe 20 by using rotary friction welding technology, and the alloy port 23 is made of high-strength wear-resistant alloy material to reduce the wear between the alloy port 23 and the third stepped hole 35.

[0090] Before installation and use, the best conveying position is positioned, that is, when the feeding pipe 20 moves axially, the conveying gas amount of the high-pressure gas input from the inner cavity 32 is related to the axial position of the feeding pipe 20, and the axial position of the feeding pipe 20 can be converted into the rotation angle of the feeding pipe 20;

[0091] Specifically, the method comprises the following steps:

[0092] S1, the left and right feeding tubes 20 in the feeder are connected to the left and right conveying pipes 10, respectively, and the left and right motors 41 are driven to make the left and right inner cavities 32 in a closed state;

[0093] S2, when testing the material conveying from left to right, the left conveying pipe 10 is connected to the atmosphere, the right conveying pipe 10 is first connected to the flowmeter and then connected to the atmosphere, the high-pressure gas is stably introduced from the left gas inlet hole 31, the flow rate q1 is recorded by the flowmeter at the left gas inlet hole 31, then the controller controls the left motor 41 to start, the left feeding tube 20 is axially moved until it moves to the leftmost side by the driving of the driving wheel 42 and the driven wheel 43, and at this time the left inner cavity 32 is gradually opened;

[0094] When the high-pressure gas enters from the left inner cavity 32, the flow rate Q1 is measured by the flowmeter at the right conveying pipe 10 in real time, and the real-time flow rate difference AQ1 is obtained according to the formula q1-Q1, when the flow rate Q1 and AQ1 reach the maximum value, the axial movement position of the left feeding tube 20 or the rotation angle of the left driven wheel 43 is recorded;

[0095] S3, when testing the material conveying from right to left, the right conveying pipe 10 is connected to the atmosphere, the left conveying pipe 10 is first connected to the flowmeter and then connected to the atmosphere, the high-pressure gas is stably introduced from the right gas inlet hole 31, the flow rate q2 is recorded by the flowmeter at the right gas inlet hole 31, then the controller controls the right motor 41 to start, the right feeding tube 20 is axially moved until it moves to the rightmost side by the driving of the driving wheel 42 and the driven wheel 43, and at this time the right inner cavity 32 is gradually opened;

[0096] When the high-pressure gas enters from the right inner cavity 32, the flow rate Q2 is measured by the flowmeter at the left conveying pipe 10 in real time, and the real-time flow rate difference AQ2 is obtained according to the formula q2-Q2, when the flow rate Q2 and AQ2 reach the maximum value, the axial movement position of the right feeding tube 20 or the rotation angle of the right driven wheel 43 is recorded;

[0097] S4, for different density gases or different conveying requirements, the real-time flow rate maximum position or the flow rate difference maximum position is selected as the best conveying position. The left and right best conveying position positioning detection methods are the same, and after the feeder is used for a period of time or frequently switches the conveying direction, the best conveying position needs to be adjusted regularly. If the maximum value of the real-time flow rate Q or the real-time flow rate difference AQ is not obvious, it indicates that the inner wall of the feeding tube 20 is seriously worn and the gas inlet pipe needs to be replaced in time;

[0098] Embodiment

[0099] As Figure 6 , Figure 7As shown, initially, the left and right inner cavities 32 are in a fully closed state, i.e., the feeding pipe 20 is close to the center of symmetry, defining the rotation angle of the driven wheel 43 as 0°, and the left conveying pipe 10 is in communication with the atmosphere, and the right conveying pipe 10 is in communication with the atmosphere after being connected to the flow meter;

[0100] The high-pressure gas is stably introduced from the left inlet hole 31, the left motor 41 is started, the left feeding pipe 20 is axially moved gradually by the driving wheel 42 and the driven wheel 43 until it is moved to the left, the driven wheel 43 rotates from 0° to 1080°, and 45° is one degree for testing, and the real-time flow rate Q1 of the right flow meter and the flow rate value q1 of the inlet are recorded;

[0101] Table 1: Calibration experiment data table of the vacuum conveyor

[0102]

[0103] As shown in Figure 6 , Figure 7 When the driven wheel 43 rotates at an angle of 540°, the real-time flow rate Q1 reaches a maximum of 226Nm 3 / h; when the driven wheel 43 rotates at an angle of 315°, the real-time flow rate difference AQ1 reaches a maximum of 92Nm 3 / h;

[0104] By driving the feeding pipe 20 to move axially by the driving assembly 40, the optimal conveying position of the feeder can be found to adapt to different working conditions and use environments.

[0105] The pipeline bidirectional pneumatic feeder in use specifically includes the following steps:

[0106] S1, the left and right feeding pipes 20 are sealed and connected to the conveying pipe 10, and the axial movement thereof is maintained;

[0107] When the conveying pipe 10 is used normally, the left and right motors 41 are started, the feeding pipes 20 are axially moved towards the center of symmetry by the corresponding driving wheels 42 and driven wheels 43, and the positioning is detected by the second sensor 62, so that the conical structure 22 of the left and right feeding pipes 20 is in complete contact and sealing with the third stepped hole 35, at this time, the second stepped hole 34 and the outside of the feeding pipe 20 form a sealed inner cavity 32, and the high-pressure gas source connected to the inlet hole 31 cannot be introduced, the pipeline bidirectional pneumatic feeder is only used as a Venturi tube or a reducer, and the material is conveyed from one side of the conveying pipe 10 through the left feeding pipe 20 or the right feeding pipe 20, and then enters the other side of the conveying pipe 10 for normal conveying;

[0108] S2, when the right unidirectional conveying is carried out, the tapered structure 22 of the right feeding pipe 20 is in complete contact and sealing with the third stepped hole 35, the left motor 41 is started to drive the left feeding pipe 20 to move away from the symmetrical center axis, and the positioning is detected through the corresponding first sensor 61, the tapered structure 22 of the left feeding pipe 20 is separated from the third stepped hole 35, the inner cavity 32 is in an open state, the high-pressure gas enters from the air inlet hole 31 and the inner cavity 32, and the high-pressure gas is unidirectionally conveyed from left to right along the tapered outer wall;

[0109] S3, when the left unidirectional conveying is carried out, the tapered structure 22 of the left feeding pipe 20 is in complete contact and sealing with the third stepped hole 35, the right motor 41 is started to drive the right feeding pipe 20 to move away from the symmetrical center axis, and the positioning is detected through the corresponding first sensor 61, the tapered structure 22 of the right feeding pipe 20 is separated from the third stepped hole 35, the inner cavity 32 is in an open state, the high-pressure gas enters from the air inlet hole 31 and the inner cavity 32, and the high-pressure gas is unidirectionally conveyed from right to left along the tapered outer wall;

[0110] S4, according to the detection method of the pipe bidirectional pneumatic feeder, the optimal conveying position is positioned before installation and use, when the unidirectional conveying is carried out, the driven wheel 43 drives the feeding pipe 20 to rotate at an angle, the corresponding feeding pipe 20 is positioned to move in the axial direction, and according to different working conditions and use environments, the real-time flow maximum position or the flow difference maximum position is selected as the optimal conveying position.

[0111] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

Claims

1. A pipe bidirectional pneumatic feeder, characterized by, It comprises: A support sleeve (30) with three coaxial and gradually decreasing diameter stepped holes (33), (34), (35) in length center symmetry; An air inlet hole (31) connected with a high-pressure air source is arranged at the second stepped hole (34), and the third stepped hole (35) is a tapered hole with a taper angle towards the center of symmetry; A pair of feeding tubes (20) are symmetrically arranged at both ends of the support sleeve (30) and are slidably sealed on the conveying pipeline (10) at the other end; Each feeding tube (20) has a tapered structure (22) at one end close to the center of symmetry and is matched with the third stepped hole (35), and the middle part is in sealing sliding with the first stepped hole (33); when the feeding tube (20) moves axially by the driving assembly (40) and one end is in sealing contact with the third stepped hole (35), the second stepped hole (34) and the tapered structure (22) of the feeding tube (20) form a sealed inner cavity (32); when the feeding tube (20) moves axially and one end is separated from the third stepped hole (35), the inner cavity (32) is in communication with the third stepped hole (35).

2. A bidirectional pneumatic pipe feeder according to claim 1, characterized in that The feeding tube (20) is threadedly connected with the inner wall of the first stepped hole (33) of the support sleeve (30); The driving assembly (40) has a motor (41) fixed on the support sleeve (30), a driving wheel (42) connected with the output end of the motor (41), and a driven wheel (43) fixed on the outside of the feeding tube (20); The driving wheel (42) and the driven wheel (43) are in meshing connection.

3. A ducted bidirectional pneumatic feeder according to claim 2, characterized in that A first sensor (61) is arranged at the end of the conveying pipeline (10), and a second sensor (62) is arranged in the first stepped hole (33); Both the first sensor (61) and the second sensor (62) are used for detecting the axial movement position of the feeding tube (20) and are connected with a controller; The controller controls the action of the motor (41).

4. A ducted bidirectional pneumatic feeder according to claim 3, characterized in that A limiting ring (24) is arranged on the outside of the feeding tube (20) in threaded connection; When one end of the feeding tube (20) is in sealing contact with the third stepped hole (35), the limiting ring (24) is in contact with the end side of the support sleeve (30), and at this time the outside of the feeding tube (20) is away from the second sensor (62) by a certain distance.

5. A bidirectional pneumatic pipe feeder according to any one of claims 1 to 3, characterized in that The contact position of the tapered end of the feeding tube (20) with the third stepped hole (35) is an alloy port (23); The angle between the tapered end of the feeding tube (20) and the horizontal plane is 10°-20°.

6. A ducted bidirectional pneumatic feeder according to claim 2, characterized in that Both the driving wheel (42) and the driven wheel (43) are helical gears; A plurality of sliding sealing rings (21) are arranged between the conveying pipeline (10) and the feeding tube (20).

7. A method of detecting the position of a pipe bidirectional pneumatic feeder according to claim 3, characterized in that, Specifically comprising the following steps: S1, connect the left and right feeding tubes (20) to the left and right conveying pipelines (10) respectively, drive the left and right motors (41) respectively, so that the left and right inner cavities (32) are in closed state; S2, when the material from left to right conveying test, left side conveying pipe (10) with the atmosphere, right side conveying pipe (10) first connect flowmeter and then with the atmosphere, high pressure gas from left side inlet hole (31) stable into, through the flowmeter of left side inlet hole (31) record its flow q1, then the controller control left side motor (41) start, through the driving wheel (42), driven wheel (43) drive left side feeding pipe (20) axial movement until moving to the left side, at this time left side inner cavity (32) gradually open; Right side conveying pipe flowmeter real-time measurement flow Q1, and according to the formula q1-Q1 obtain real-time flow difference ΔQ1, when the flow Q1, ΔQ1 reaches the maximum value, record left side feeding pipe (20) axial movement position, or left side driven wheel (43) rotation angle; S3, when the material from right to left conveying test, right side conveying pipe (10) with the atmosphere, left side conveying pipe (10) first connect flowmeter and then with the atmosphere, high pressure gas from right side inlet hole (31) stable into, through the flowmeter of right side inlet hole (31) record its flow q2, then the controller control right side motor (41) start, through the driving wheel (42), driven wheel (43) drive right side feeding pipe (20) axial movement until moving to the right side, at this time right side inner cavity (32) gradually open; Left side conveying pipe flowmeter real-time measurement flow Q2, and according to the formula q2-Q2 obtain real-time flow difference ΔQ2, when the flow Q2, ΔQ2 reaches the maximum value, record right side feeding pipe (20) axial movement position, or right side driven wheel (43) rotation angle; S4, for different density of gas or different conveying requirements, select real-time flow maximum position or flow difference maximum position as the best conveying position.

8. A method of using the bidirectional pneumatic feeder of claim 3, wherein, Specifically includes the following steps: S1, left and right side feeding pipe (20) sealing and conveying pipe (10) connection, and keep its axial movement; When the conveying pipe (10) normal use, left and right motor (41) start, through the corresponding driving wheel (42), driven wheel (43) drive feeding pipe (20) axial movement to the symmetry center, through the second sensor (62) detection positioning, so that the left and right feeding pipe (20) taper structure (22) and the third step hole (35) completely contact sealing, at this time the second step hole (34) and feeding pipe (20) outside form sealed inner cavity (32), with the inlet hole (31) connection high pressure gas source can't into, pipe bidirectional pneumatic feeder only as venturi or reducer use; Material from one side of the conveying pipe (10) through the left side feeding pipe (20) or right side feeding pipe (20), and then enter the other side of the conveying pipe (10) for normal conveying; S2, when the right unidirectional conveying is carried out, the tapered structure (22) of the right feeding pipe (20) is in complete contact and sealing with the third stepped hole (35), the left motor (41) is started to drive the left feeding pipe (20) to move away from the symmetry center axis, and the positioning is detected through the corresponding first sensor (61), the tapered structure (22) of the left feeding pipe (20) is separated from the third stepped hole (35), the inner cavity (32) is in an open state, the high-pressure gas enters from the air inlet hole (31) and the inner cavity (32), and the high-pressure gas is unidirectionally conveyed from left to right along the tapered outer wall; S3, when the left unidirectional conveying is carried out, the tapered structure (22) of the left feeding pipe (20) is in complete contact and sealing with the third stepped hole (35), the right motor (41) is started to drive the right feeding pipe (20) to move away from the symmetry center axis, and the positioning is detected through the corresponding first sensor (61), the tapered structure (22) of the right feeding pipe (20) is separated from the third stepped hole (35), the inner cavity (32) is in an open state, the high-pressure gas enters from the air inlet hole (31) and the inner cavity (32), and the high-pressure gas is unidirectionally conveyed from right to left along the tapered outer wall; S4, the positioning detection method of the pipe bidirectional pneumatic feeder according to claim 7, when the unidirectional conveying is carried out, the driven wheel (43) drives the feeding pipe (20) to rotate an angle, positions the axial movement position of the corresponding feeding pipe (20), and according to different working conditions and use environments, selects the real-time flow maximum position or the flow difference maximum position as the best conveying position.

Images