Elastic material collecting device and dynamic material discharging method

Abstract

The invention relates to an elastic material gathering and collecting device and a dynamic material discharging method. The technical scheme is that a rectangular frame which slides up and down in the height direction is arranged in a box body, an upper bag body is arranged between the upper part of the rectangular frame and the inner wall of the box body top plate, a lower bag body is suspended at the lower part of the rectangular frame, the upper bag body, the rectangular frame and the lower bag body together form a loading space, a material opening which is connected to the inside and the outside is opened at the center of the box body top plate where the loading space is located, a driving sleeve is rotatably inserted on the material opening, a torsion spring for storing or releasing the torque between the upper sleeve body and the lower sleeve body is between the upper sleeve body and the lower sleeve body, a steel wire rope is connected to the four corners of the rectangular frame on the inside of the upper bag body, the upper end of the steel wire rope is wound around the corresponding fixed pulleys and then wound in the winding groove on the outer wall of the lower sleeve body. The invention can collect materials without residue, greatly improve the efficiency of unloading, shorten the unloading time, save the unloading cost, and is an innovation in the powder material transportation device.

Description

Technical Field

[0001] The invention relates to an elastic material collecting device for powder (granular material) loading and unloading and a dynamic material discharging method. Background Art

[0002] Most industrial powder materials have fine particles, strong fluidity, easy to lose and be contaminated. At present, this kind of powder materials are often shipped in car boxes and ship holds. When unloading, the powder materials are sucked out by the fan through the discharge channel extending into the discharge port on the top of the car. When the wind discharges, the powder materials far away from the discharge channel remain and are difficult to be sent out. Usually, the final residual amount reaches 10%-30% of the total amount, and it is necessary to manually enter the car to clean it up later, which is time-consuming and labor-intensive. In addition, the overall material collection speed is slow and the efficiency is low. Its improvement and innovation are imperative. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide an elastic material gathering and collecting device and a dynamic material discharging method, which can effectively solve the problems of large residual amount and low discharging efficiency of wind-powered material discharging in the carriage.

[0004] The technical solution provided by the present invention is:

[0005] A flexible material gathering and collecting device comprises a box body, which is a hollow structure. A rectangular frame that slides up and down in the height direction is arranged in the box body. An upper bag body is arranged between the upper part of the rectangular frame and the inner wall of the box body top plate. The upper edge of the upper bag body is sealed to the inner wall of the box body top plate, and the lower edge of the upper bag body is sealed to the rectangular frame. A lower bag body is suspended at the lower part of the rectangular frame. The lower bag body is a hollow structure with an upper opening, and its upper opening is sealed to the lower part of the rectangular frame. The upper bag body, the rectangular frame and the lower bag body together form a loading space. A material opening that is connected to the inside and outside is opened at the center of the box body top plate where the loading space is located. A driving sleeve is rotatably inserted on the material opening, and a feeding channel that is connected to the top and bottom is opened in the center of the driving sleeve. The lower end of the driving sleeve extends into the loading space along the material opening, and the outer wall of the driving sleeve that extends into the part An upper sleeve body is fixedly connected to the upper part and extends toward a direction away from the axis center. A lower sleeve body that rotates relatively is sleeved on the lower part of the upper sleeve body. The inner edge of the lower sleeve body is separated from the driving sleeve. A winding groove is arranged on the outer wall of the lower sleeve body. A torsion spring is used to store or release the torque between the upper and lower sleeve bodies. A steel wire rope is connected to the four corners of the rectangular frame on the inside of the upper bag body. The lower end of the steel wire rope is fixed to the rectangular frame. The upper end of the steel wire rope is wound around corresponding fixed pulleys and then installed in the winding groove on the outer wall of the lower sleeve body. A limiting pipe protruding upward is arranged on the upper surface of the box body outside the material port. A ratchet is fixed on the outer wall of the driving sleeve extending out of the material port. A pawl corresponding to the ratchet is rotatably arranged on the inner wall of the limiting pipe, forming a unidirectional rotation structure of the driving sleeve.

[0006] A method for dynamically discharging powder materials using the elastic material gathering and collecting device comprises the following steps:

[0007] 1. Loading

[0008] Load the powder material into the loading space from the material channel in the center of the driving sleeve, and then install a sealing cover that matches the upper opening of the limiting pipe to seal it, and the loading is completed;

[0009] 2. Torsion spring preload

[0010] After the box is transported to the destination, the sealing cover is opened, and the driving sleeve is rotated clockwise to drive the upper sleeve to rotate clockwise. Due to the heavy weight of the powder material, the wire rope is pressed, causing the lower sleeve to be unable to rotate. Therefore, during the rotation of the upper sleeve, the torsion spring between the upper and lower sleeves is pre-tightened. Finally, the ratchet is clamped by the pawl, so that the upper sleeve cannot rotate counterclockwise to release the pre-tightening force of the torsion spring, and the torsion spring pre-tightening is completed;

[0011] 3. Unloading

[0012] Insert the feeding pipeline from the feeding channel in the center of the driving sleeve into the loading space, and start the exhaust fan on the feeding pipeline at the same time. Under the action of wind pressure, the powder material in the loading space rolls under negative pressure, and is finally sent out from the lower port of the feeding pipeline under the action of negative pressure. As the powder material is sent out, the powder material in the center of the loading chamber is sent out first, so that a groove is gradually formed in the center. At the same time, the feeding pipeline is continuously moved downward during the discharging process. As the groove increases, the powder material on the surroundings keeps concentrating in the middle. Since the powder material on the surroundings is moved in the vertical direction The thickness of the bag keeps shrinking, that is, the weight of the powder material around it keeps decreasing, and the elastic preload of the torsion spring is released through the steel wire rope, driving the lower sleeve to rotate, and driving the steel wire rope to continuously rotate and wind in the winding groove of the lower sleeve, pulling the rectangular frame upward, and finally the lower bag bodies around it are lifted up under the traction of the rectangular frame, thereby forming a downward slope from the surrounding of the loading space to the center, and the powder material is continuously concentrated along the slope to the center and sent out from the lower port of the feeding pipeline, so that all the powder material in the loading cavity is cleaned up, so that there is no residue when collecting the material.

[0013] The invention has a novel and unique structure, is simple and reasonable, easy to produce and easy to operate. By arranging a torsion spring between the upper sleeve and the lower sleeve which can rotate relatively, the gravity of the powder material itself is cleverly used to limit the rotation of the lower sleeve, so that the torsion spring is pre-tightened by the rotation of the upper sleeve, and the bag body is retracted and released by the pre-tightening force; the upper bag body, the rectangular frame and the lower bag body form a closed loading space, so that wind-force material collection can be achieved by air pressure, and as the material collection proceeds, the weight of the surrounding powder material continues to decrease, and the elastic pre-tightening force of the torsion spring is released through the steel wire rope, and the rectangular frame is retracted and released. The rack is pulled upward to form a downward slope from the four sides of the loading space to the center. The powder material is continuously concentrated along the slope toward the center and sent out from the lower end of the feeding pipe, so that all the powder material in the loading space is cleaned up and there is no residue when collecting the material. When collecting the material by traditional wind feeding method, there will often be 10%-30% residue, which needs to be cleaned manually. The technical solution of the present application achieves almost no residue, greatly improves the unloading efficiency, shortens the unloading time, saves the unloading cost, is easy to use, has good effect, and is an innovation in powder material loading and unloading equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a sectional front view of the present invention.

[0015] Figure 2-4 The following are the cross-sectional front views of the material receiving process of the present invention in use state. Figure 2 , Figure 3 The rectangular frame is not lifted up and is at the lower limit position. Figure 4 The rectangular frame is lifted up and is located at the upper limit position.

[0016] Figure 5 All of them are cross-sectional bottom views of the box body of the present invention.

[0017] Figure 6 It is a cross-sectional top view of the rectangular frame of the present invention.

[0018] Figure 7 For the present invention Figure 6 A partial enlarged view of point A in the middle.

[0019] Figure 8 It is a partial enlarged cross-sectional view of the drive sleeve of the present invention.

[0020] Fig. 9 , 10 FIG. 1 is a top view of the ratchet of the present invention. Fig. 9 The pawl is stuck in the tooth groove of the ratchet. Fig.10 The pawl is disengaged from the tooth groove of the ratchet wheel. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0022] Depend on Figure 1-10 The present invention comprises a box body 1, which is a hollow structure. A rectangular frame 8 which slides up and down in the height direction is arranged in the box body 1. An upper bag body 9a is arranged between the upper part of the rectangular frame 8 and the inner wall of the box top plate. The upper edge of the upper bag body 9a is sealedly connected to the inner wall of the box top plate, and the lower edge of the upper bag body 9a is sealedly connected to the rectangular frame 8. A lower bag body 9b is suspended at the lower part of the rectangular frame 8. The lower bag body 9b is a hollow structure with an upper opening, and its upper opening is sealedly connected to the lower part of the rectangular frame 8. The upper bag body 9a, the rectangular frame 8 and the lower bag body 9b together form a loading space 9. A material port 1a which is connected to the inside and outside is opened at the center of the box top plate where the loading space 9 is located. A driving sleeve 2 is rotatably inserted on the material port 1a. A feeding channel 2a which is connected up and down is opened in the center of the driving sleeve 2. The lower end of the driving sleeve 2 extends into the loading space 9 along the material port, and the outer wall of the driving sleeve which extends into the material port is provided with a material port. An upper sleeve body 4 extending away from the axis is fixedly connected, and a lower sleeve body 5 rotating relatively is sleeved on the lower part of the upper sleeve body 4. The inner edge of the lower sleeve body 5 is separated from the driving sleeve, and a winding groove 5a is arranged on the outer wall of the lower sleeve body 5. A torsion spring 6 for storing or releasing the torque between the upper and lower sleeve bodies is arranged between the upper sleeve body 4 and the lower sleeve body 5. A steel wire rope 12 is connected to the inner side of the upper bag body 9a at the four corners of the rectangular frame 8, and the lower end of the steel wire rope 12 is fixed to the rectangular frame, and the upper end of the steel wire rope 12 is wound around the corresponding fixed pulleys 11 and then installed in the winding groove 5a on the outer wall of the lower sleeve body. A limiting pipe 13 protruding upward is arranged on the upper surface of the box body outside the material port 1a, and a ratchet 3 is fixed on the outer wall of the driving sleeve 2 extending out of the material port, and a ratchet pawl 7 corresponding to the ratchet 3 is rotatably arranged on the inner wall of the limiting pipe 13, forming a unidirectional rotation structure of the driving sleeve.

[0023] To ensure the use effect, the upper bag body and the lower bag body are both made of airtight deformable materials, such as rubber tarpaulin, aramid cloth covered with rubber on the surface and other deformable airtight materials. When the rectangular frame rises, the upper bag body will be compressed and deformed; the box body is a rectangular compartment and can be made of steel plates.

[0024] The sealing connection between the upper end of the upper bag body 9a and the box body can be suspended in the box body by adhesive connection, and the sealing connection between the lower edge of the upper bag body and the upper edge of the lower bag body and the rectangular frame can be glued.

[0025] The driving sleeve 2 includes a driving sleeve body 21 and a limiting top plate 22 fixedly connected to the top outer wall of the driving sleeve body. The driving sleeve body 21 is inserted into the loading space 9 along the material port 1a, and the upper sleeve body 4 is fixed together with the outer wall of the driving sleeve body extending into the loading space; the limiting top plate 22 falls on the surface of the box body, the driving sleeve body is inserted along the material port and the outer diameter of the driving sleeve body is smaller than the inner diameter of the material port, so the driving sleeve can rotate relative to the material port. In order to facilitate the relative rotation of the two, in actual production, a guiding component such as a ring guide rail, a slider, a pulley, etc. can also be set between the limiting top plate and the surface of the box body.

[0026] The limit top plate 22 is fixed with a rotating handle 18 extending upward; open the sealing cover 14, enter from the limit pipe 13, hold the rotating handle to rotate the drive sleeve 2 relative to the material inlet, thereby driving the upper sleeve body 4 to rotate, facilitating the torsion spring pre-tightening operation.

[0027] A vertically arranged rotating shaft 71 is fixed between the inner wall of the limiting pipe 13 and the ratchet 3, and the ratchet 7 is rotatably connected to the rotating shaft 71. A limiting block 72 fixed to the driving sleeve is arranged on one side of the ratchet 7; the ratchet is moved to insert the stop pawl at the end of the ratchet into the tooth groove of the ratchet (such as Fig. 9 As shown in the figure), by rotating the handle to rotate the drive sleeve clockwise, the stop claw of the pawl slides on the back of the ratchet tooth without affecting its clockwise rotation, thereby pre-tightening the torsion spring between the upper and lower sleeve bodies. After the pre-tightening is completed, the pawl is close to the limit block and the pawl is stuck in the tooth groove of the ratchet, so that the drive sleeve cannot rotate counterclockwise. After the material is collected, push the pawl outward to disengage the ratchet tooth groove (as shown in the figure). Fig.10 As shown), the driving sleeve can be released to allow the rectangular frame to drop and reset.

[0028] The four corners of the rectangular frame 8 are provided with rollers 17 rolling in the vertical direction, and the inner walls on both sides of the box body 1 are provided with tracks 15 arranged in the vertical direction. The rollers are placed in the tracks and slide up and down along the length direction, forming a guiding structure for the upper edge of the lower bag body to slide up and down.

[0029] The four corners of the rectangular frame 8 are respectively connected with roller support plates 171 , and the roller 17 is rotatably connected to the roller support plate 171 via a rotating shaft, and the roller 17 is slidably arranged in the track 15 .

[0030] The four corners inside the upper bag body 9a are respectively fixed with hooks 18 for fixing and connecting the wire rope, and the lower end of the wire rope 12 is fixedly connected to the hook. The fixed pulley is fixed to the top plate of the box body through a pulley support plate.

[0031] A sealing cover 14 for sealing the upper opening of the position limiting pipe 13 is screwed on the upper opening.

[0032] A feeding pipeline 16 extending into the loading space 9 is inserted in the center of the feeding channel 2a, and an exhaust fan is installed at one end of the feeding pipeline 16 extending out of the box.

[0033] A powder flow meter can be set on the feeding pipeline 16 to monitor its flow rate. As the discharging proceeds, the feeding pipeline is moved downward. It can be lifted manually or by arranging a conventional clamping mechanism on the outside of the box, such as a manipulator or a hydraulic cylinder clamping mechanism to set a guide sleeve. The feeding pipeline passes through the center hole of the guide sleeve and is clamped by the telescopic rod of the hydraulic cylinder. When it needs to be lowered, the hydraulic cylinder is released and the feeding pipeline descends under the action of gravity. The powder flow meter can monitor the flow of powder materials in real time. It is a prior art. For example, the HDLDG-06 powder flow meter sold by Wuhan Huadelin Technology Co., Ltd. can be used. The flow rate is monitored by the powder flow meter to determine the lifting and lowering. If the flow rate continues to decrease, the feeding pipeline is lowered so that it always maintains a small distance (3-5cm) from the material surface to ensure the release of pressure and facilitate discharging.

[0034] The height of the lower limit position of the rectangular frame 8 is 1 / 3 of the total height of the box cavity, and the height of the upper limit position of the rectangular frame 8 is 2 / 3 of the total height of the box cavity; this limit position is determined by the length and height position of the track 15, and this height position is defined as a preferred embodiment. The initial state is as follows Figure 1 , 2 As shown, when the lower bag falls onto the bottom plate of the box, and the rectangular frame lifts the lower bag from the 1 / 3 position to the 2 / 3 position of the box height, the upper edge of the lower bag around it can be lifted, forming a slope (a trapezoidal body with a larger top and a smaller bottom) around it, and the powder materials around it are concentrated toward the center along the slope.

[0035] A method for dynamically discharging powder materials using the elastic material gathering and collecting device comprises the following steps:

[0036] 1. Loading

[0037] The powder material 10 is loaded into the loading space 9 from the material channel 2a at the center of the driving sleeve 2, and then a sealing cover 14 matching the upper opening of the limiting pipe 13 is installed to seal the loading;

[0038] 2. Torsion spring preload

[0039] After the box is transported to the destination, the sealing cover 14 is opened, and the driving sleeve 2 is rotated clockwise to drive the upper sleeve 4 to rotate clockwise. Since the powder material 10 is heavy and compresses the wire rope, the lower sleeve 5 cannot rotate. Therefore, during the rotation of the upper sleeve, the torsion spring between the upper and lower sleeves is pre-tightened. Finally, the ratchet is clamped by the pawl, so that the upper sleeve 4 cannot rotate counterclockwise to release the pre-tightening force of the torsion spring, and the torsion spring pre-tightening is completed.

[0040] 3. Unloading

[0041] The feeding pipe 16 is inserted into the charging space 9 from the feeding channel 2a at the center of the driving sleeve 2, and the exhaust fan on the feeding pipe 16 is started at the same time. The powder material in the charging space is rolled under the negative pressure under the action of the wind pressure, and finally sent out from the lower end of the feeding pipe 16 under the action of the negative pressure. As the powder material is sent out, the powder material in the center of the charging cavity is sent out first, so that a groove is gradually formed in the center (such as Figure 3 As shown in the figure, the feeding pipeline is continuously moved downward during the discharging process. As the groove increases, the powder materials on the surrounding sides are continuously concentrated in the middle. As the thickness of the powder materials on the surrounding sides along the vertical direction is continuously reduced, that is, the weight of the powder materials on the surrounding sides is continuously reduced, the elastic preload of the torsion spring is released through the wire rope, driving the lower sleeve to rotate, driving the wire rope to continuously rotate and wind in the winding groove 5a of the lower sleeve, pulling the rectangular frame upward, and finally the lower bag bodies on the surrounding sides are lifted up under the traction of the rectangular frame. The middle part is not lifted up due to the heavy weight of the powder materials and the limit at the lower end of the feeding pipeline, thereby forming a downward slope from the surrounding of the loading space to the center (as shown in the figure). Figure 4 As shown in the figure, the powder material is continuously concentrated toward the center along the slope and sent out from the lower opening of the feeding pipeline, so that all the powder material in the charging chamber is cleaned up and there is no residue when receiving the material.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] 1. By setting a torsion spring between the relatively rotatable upper sleeve and the lower sleeve, the gravity of the powder material itself is cleverly used to limit the rotation of the lower sleeve, so that the torsion spring is pre-tightened by the rotation of the upper sleeve, and the bag body is retracted and released by the pre-tightening force;

[0044] 2. The upper bag body, the rectangular frame and the lower bag body form a closed loading space, so that the wind-forced material collection can be achieved through air pressure, and as the material collection proceeds, the weight of the powder material around it continues to decrease, and the elastic preload of the torsion spring is released through the wire rope, pulling the rectangular frame upward, forming a downward slope from the surrounding of the loading space to the center, and the powder material is continuously concentrated along the slope to the center and sent out from the lower port of the feeding pipeline, so that all the powder material in the loading space is cleaned up, so that there is no residue when collecting the material. When the traditional wind feeding method is used for collecting the material, there is often 10%-30% residue, which needs to be cleaned manually. The technical solution of this application achieves almost no residue;

[0045] 3. Since the bag body is lifted up by wind pressure to form a slope, the efficiency of collecting materials is greatly improved. After practical application, the same or similar technical effects have been achieved. Taking 60 tons of alumina powder as an example, it takes more than 80-90 minutes to unload. The dynamic air bag material gathering and collecting device of the present application takes only 20-25 minutes to collect materials, which greatly improves the efficiency of unloading, shortens the unloading time, and saves the unloading cost.

[0046] 4. There is only one material port on the top of the box, which takes into account both loading and unloading;

[0047] 5. The discharge pipeline is detachable and does not need to be transported with the vehicle, nor does it need to be fixed on the discharge port all the time. This also avoids the risk of blockage of the discharge pipeline during transportation.

[0048] The applicant also needs to point out that what is mentioned above in this application is merely an embodiment and is not intended to limit the scope of protection of this application. Any technical solution that is essentially the same as the technical solution of this application made by equivalent or equivalent alternative means shall fall within the scope of protection of this application.

Claims

1. An elastic material collecting device, comprising a box (1), characterized in that: The box body (1) is a hollow structure. A rectangular frame (8) is arranged inside the box body (1) and slides up and down in the height direction. An upper bag body (9a) is arranged between the upper part of the rectangular frame (8) and the inner wall of the box body top plate. The upper edge of the upper bag body (9a) is sealed and connected to the inner wall of the box body top plate. The lower edge of the upper bag body (9a) is sealed and connected to the rectangular frame (8). A lower bag body (9b) is suspended at the lower part of the rectangular frame (8). The lower bag body (9b) is a hollow structure with an upper opening, and its upper opening is connected to the rectangular frame. The upper bag body (9a), the rectangular frame (8) and the lower bag body (9b) are sealed and connected to each other at the bottom, and the upper bag body (9a), the rectangular frame (8) and the lower bag body (9b) together enclose a loading space (9). A material port (1a) that is connected to the inside and outside is opened at the center of the top plate of the box body where the loading space (9) is located. A driving sleeve (2) is rotatably inserted on the material port (1a). A feeding channel (2a) that is connected to the top and bottom is opened at the center of the driving sleeve (2). The lower end of the driving sleeve (2) extends into the loading space (9) along the material port, and a material port (2a) that is connected to the driving sleeve (2) is fixedly connected to the outer wall of the extending portion. An upper sleeve (4) extends in a direction away from the axis, a lower sleeve (5) is sleeved on the lower part of the upper sleeve (4) and is relatively rotatable, the inner edge of the lower sleeve (5) is separated from the driving sleeve, a winding groove (5a) is arranged on the outer wall of the lower sleeve (5), a torsion spring (6) is provided between the upper sleeve (4) and the lower sleeve (5) for storing or releasing the torque between the upper and lower sleeves, a steel wire rope (12) is connected to the four corners of the rectangular frame (8) on the inner side of the upper bag body (9a), and the lower end of the steel wire rope (12) is provided with a spring (6) for storing or releasing the torque between the upper and lower sleeves. The ends are fixed together with the rectangular frame, the upper ends of the steel wire ropes (12) are wound around the corresponding fixed pulleys (11) and then wound in the winding grooves (5a) on the outer wall of the lower casing body, an upwardly protruding limiting pipe (13) is arranged on the upper surface of the box body outside the material port (1a), a ratchet (3) is fixed on the outer wall of the driving sleeve (2) extending out of the material port, and a ratchet pawl (7) corresponding to the ratchet (3) is rotatably arranged on the inner wall of the limiting pipe (13), forming a unidirectional rotating structure of the driving sleeve.

2. The elastic material collecting device according to claim 1, characterized in that: The driving sleeve (2) comprises a driving sleeve body (21) and a limiting top plate (22) fixedly connected to the top outer wall of the driving sleeve body. The driving sleeve body (21) is inserted into the loading space (9) along the material opening (1a), and the upper sleeve body (4) is fixed together with the outer wall of the driving sleeve body extending into the loading space.

3. The elastic material collecting device according to claim 2, characterized in that: A rotating handle (18) extending upward is fixed on the position-limiting top plate (22).

4. The elastic material collecting device according to claim 1, characterized in that: A vertically arranged rotating shaft (71) is fixed between the inner wall of the limiting pipe (13) and the ratchet (3), the ratchet (7) is rotatably connected to the rotating shaft (71), and a limiting block (72) fixed to the driving sleeve is arranged on one side of the ratchet (7).

5. The elastic material gathering and collecting device according to claim 1, characterized in that: The four corners of the rectangular frame (8) are provided with rollers (17) that roll in the vertical direction. The inner walls on both sides of the box body (1) are provided with tracks (15) arranged in the vertical direction. The rollers are placed in the tracks and slide up and down along the length direction thereof, forming a guide structure for the upper edge of the lower bag body to slide up and down.

6. The elastic material gathering and collecting device according to claim 1, characterized in that: The upper opening of the position-limiting pipe (13) is screwed with a sealing cover (14) for sealing the upper opening.

7. The elastic material gathering and collecting device according to claim 1, characterized in that: A feeding pipeline (16) extending into the loading space (9) is inserted in the center of the feeding channel (2a), and an exhaust fan is installed at one end of the feeding pipeline (16) extending out of the box body.

8. The elastic material gathering and collecting device according to claim 1, characterized in that: The height of the lower limit position of the rectangular frame (8) is 1 / 3 of the total height of the inner cavity of the box body, and the height of the upper limit position of the rectangular frame (8) is 2 / 3 of the total height of the inner cavity of the box body.

9. A method for dynamically discharging powder materials using the elastic material collecting device of claim 2, characterized in that: The following steps are involved:

1. Loading The powder material (10) is loaded into the loading space (9) from the material channel (2a) at the center of the driving sleeve (2), and then a sealing cover (14) matching the upper opening of the limiting pipe (13) is installed to seal the space, thereby completing the loading; 2. Torsion spring preload After the box is transported to the destination, the sealing cover (14) is opened, and the driving sleeve (2) is rotated clockwise, driving the upper sleeve (4) to rotate clockwise. Since the powder material (10) is heavy, it compresses the steel wire rope, making the lower sleeve (5) unable to rotate. Therefore, during the rotation of the upper sleeve, the torsion spring between the upper and lower sleeves is pre-tightened. Finally, the ratchet wheel is clamped by the pawl, so that the upper sleeve (4) cannot rotate counterclockwise to release the pre-tightening force of the torsion spring, thereby completing the pre-tightening of the torsion spring.

3. Unloading The feeding pipe (16) is inserted into the loading space (9) from the feeding channel (2a) at the center of the driving sleeve (2), and the exhaust fan on the feeding pipe (16) is started at the same time. Under the action of wind pressure, the powder material in the loading space is rolled under negative pressure, and finally sent out from the lower opening of the feeding pipe (16) under the action of negative pressure. As the powder material is sent out, the powder material in the center of the loading chamber is sent out first, so that a groove is gradually formed in the center. At the same time, the feeding pipe is continuously moved downward during the discharge process. As the groove increases, the powder material on the surroundings is continuously concentrated to the center. The thickness of the powder material in the vertical direction is continuously reduced, that is, the weight of the powder material around is continuously reduced, and the elastic preload of the torsion spring is released through the steel wire rope, driving the lower sleeve to rotate, driving the steel wire rope to continuously rotate and wind in the winding groove (5a) of the lower sleeve, pulling the rectangular frame upward, and finally the lower bag bodies around are pushed upward under the traction of the rectangular frame, thereby forming a downward slope from the surrounding of the loading space to the center, and the powder material is continuously concentrated along the slope to the center and sent out from the lower opening of the feeding pipeline, so that all the powder material in the loading chamber is cleaned up, so that there is no residue when collecting the material.

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