Material conveying device for polyacrylamide preparation and operation method

Abstract

The invention relates to the technical field of material conveying devices, in particular to a material conveying device for polyacrylamide preparation and an operation method.The material conveying device comprises a material conveying barrel, a spiral shaft is rotationally connected into the material conveying barrel, a feeding hopper is installed at the bottom end of the material conveying barrel, and the top of the material conveying barrel is sleeved with a protective cover; a plurality of heating pipes are fixedly arranged on the outer side of the conveying barrel in a sleeving mode, a movable frame is slidably connected between the protective cover and the conveying barrel, a screw rod is in threaded connection with the surface of the movable frame, one end of the screw rod is rotationally connected to the end of the protective cover, a plurality of mounting grooves are formed in the inner ring face of the movable frame, and knocking blocks are inserted into the mounting grooves; a spring is fixed between the knocking block and the mounting groove; the device has the beneficial effects that by arranging the moving frame, the knocking block, the spring, the heating pipe and other structures, in the reciprocating movement process of the moving frame, the knocking block periodically knocks the outer wall of the material conveying barrel through the elastic effect of the spring and blocking of the heating pipe, and therefore materials, close to the inner wall of the material conveying barrel, for preparing polyacrylamide are vibrated off.

Description

Technical Field

[0001] This invention relates to the field of material conveying devices, specifically to a material conveying device and its operating method for preparing polyacrylamide. Background Technology

[0002] Material conveying is a crucial step in the production of polyacrylamide. However, existing material conveying systems for polyacrylamide production suffer from numerous problems in practical use.

[0003] On the one hand, during material conveying, some materials tend to adhere to the inner wall of the conveying cylinder. Over time, these adhered materials gradually accumulate, not only affecting the effective volume of the conveying cylinder and reducing conveying efficiency, but also potentially causing uneven material conveying, affecting the stability of subsequent production processes and product quality. Moreover, cleaning these materials adhering to the inner wall of the conveying cylinder is quite difficult, requiring a significant amount of manpower and time, thus increasing production costs.

[0004] On the other hand, the materials used in the preparation of polyacrylamide have certain requirements regarding temperature and dryness during transportation. Existing conveying devices struggle to achieve uniform drying and effective heat preservation of the materials during transport. Uneven drying may alter the material's properties, affecting the final performance of the polyacrylamide; conversely, poor heat preservation may cause the material's temperature to drop during transport, hindering subsequent processing. Furthermore, the heating device on the outer wall of the conveying cylinder lacks effective protective measures, making it susceptible to interference and damage from external factors, thus affecting heating efficiency and service life. Summary of the Invention

[0005] The purpose of this invention is to provide a material conveying device and operating method for preparing polyacrylamide, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a material conveying device for preparing polyacrylamide, comprising a conveying cylinder, a spiral shaft rotatably connected inside the conveying cylinder, a feeding hopper installed at the bottom end of the conveying cylinder, a protective cover fitted on the top of the conveying cylinder, multiple heating tubes fixedly fitted on the outer side of the conveying cylinder, a movable frame slidably connected between the protective cover and the conveying cylinder, a screw threaded onto the surface of the movable frame, one end of the screw rotatably connected to the end of the protective cover, multiple mounting grooves opened on the inner ring surface of the movable frame, a striking block inserted into the inside of the mounting groove, and a spring fixed between the striking block and the mounting groove; During the reciprocating movement of the screw-driven moving frame inside the feed cylinder and protective cover, when the spring passes the heating tube, the striking block is squeezed and compressed into the mounting groove by the heating tube, squeezing the spring. After the striking block passes the heating tube, the spring rebounds and pushes the striking block to strike the feed cylinder. A retaining ring is fixedly fitted on the outside of the conveying cylinder, sealing one end of the protective cover. A cavity is opened inside the feeding hopper. A reserved groove is opened on the surface of the screw shaft. Multiple through holes are opened on the surface of the reserved groove. A first air supply pipe is inserted and fixed to the surface of the retaining ring. One end of the first air supply pipe is inserted into the cavity. A second air supply pipe is inserted and fixed to the surface of the feeding hopper. One end of the second air supply pipe passes through the bottom plate of the conveying cylinder and is inserted into the reserved groove. The high-temperature gas between the protective cover and the conveying cylinder is injected into the cavity through the first air supply pipe. The gas flows through the second air supply pipe into the reserved groove and then dissipates through the through holes.

[0007] Preferably, a servo motor is fixed to the top of the feeding cylinder, and the top of the spiral shaft passes through the top plate of the feeding cylinder and is connected to the power output end of the servo motor. A bearing is sleeved at the bottom of the spiral shaft and fixed to the bottom plate of the feeding cylinder. An insertion port is opened at the top of the feeding cylinder, and a discharge pipe is inserted into the insertion port. A threaded sleeve is screwed onto the outside of the discharge pipe and fixed to the outer wall of the feeding cylinder. A handle is fixed at the opening of the threaded sleeve. The outer wall of the discharge pipe is provided with external threads, and the external threads are connected to the internal threads of the inner ring of the threaded sleeve.

[0008] Preferably, the protective cover is a cylindrical structure with an "L" shaped cross-section. Multiple screws are fixed at one end of the protective cover, and multiple insertion holes are opened on the surface of the retaining ring. The insertion holes and screws correspond one-to-one. After the screw passes through the corresponding insertion hole, a screw nut is sleeved at the end.

[0009] Preferably, a one-way air inlet valve is inserted and fixed to the surface of the retaining ring, a pressure relief valve is inserted and fixed to the top plate of the conveying cylinder, and an air pump is fixed to the top plate of the conveying cylinder. The air outlet pipe of the air pump passes through the top plate of the conveying cylinder and extends into the space between the conveying cylinder and the protective cover. The cavity is an annular groove, and the top end of the second air pipe is inserted into the cavity.

[0010] Preferably, the outer wall of the protective cover has a reserved opening, and a limit ring is fixed to the outer wall of the protective cover. The limit ring is sleeved on the tube body of the discharge pipe, and multiple hand-tightening screws are screwed to the outer wall of the limit ring. The hand-tightening screws pass through the limit ring and are screwed to the outer wall of the discharge pipe.

[0011] Preferably, a second servo motor is fixed on the top plate of the protective cover, the top end of the lead screw is connected to the power output end of the second servo motor, a connecting block is fixed on the inner wall of the protective cover, a guide post is fixed on the surface of the guide post, the guide post passes through the movable frame, and a second bearing is sleeved on the bottom end of both the guide post and the lead screw, and the second bearing is fixed on the surface of the retaining ring.

[0012] Preferably, the surface of the movable frame is provided with screw holes and through holes, the lead screw passes through and is screwed into the screw holes, and the guide post passes through the through holes.

[0013] Preferably, the height of the striking block is greater than the thickness of the heating tube, and the end of the striking block extending out of the mounting groove has a frustum structure.

[0014] An operating method for a material conveying device for polyacrylamide preparation, the operating method comprising the following steps: After the screw shaft is started, it conveys the polyacrylamide preparation material fed from the feeding hopper upwards. After passing through the protective cover, the material is discharged into the production equipment through the discharge pipe. During this process, the heating pipe is turned on, and the heating pipe generates heat to heat the conveying cylinder. The conveying cylinder keeps the polyacrylamide preparation material inside warm and dries it. The high-temperature gas between the protective cover and the conveying cylinder is injected into the reserved groove through the gas conveying pipe one and gas conveying pipe two. The gas is diffused into the interior of the conveying cylinder through the through hole, so that the polyacrylamide preparation material inside the conveying cylinder is dried evenly. Simultaneously, the lead screw is activated, and as the lead screw drives the moving frame to reciprocate between the feeding cylinder and the protective cover, the striking block repeatedly strikes the feeding cylinder, causing the polyacrylamide preparation material near the inner wall of the feeding cylinder to fall off.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The material conveying device and operating method for polyacrylamide preparation proposed in this invention, through the arrangement of a moving frame, a striking block, springs, and heating tubes, utilizes the elasticity of the springs and the obstruction of the heating tubes during the reciprocating movement of the moving frame to cause the striking block to periodically strike the outer wall of the conveying cylinder, thereby shaking off the polyacrylamide preparation material close to the inner wall of the conveying cylinder. This design avoids the accumulation of material on the inner wall of the conveying cylinder, ensures the effective volume of the conveying cylinder, improves the uniformity and efficiency of material conveying, and reduces the labor and time costs incurred in cleaning the inner wall.

[0016] Air is injected into the annular space between the conveying cylinder and the protective cover using an air pump. The heating element heats the air in the annular space while simultaneously heating the material inside the conveying cylinder. The hot air is then injected into the cavity of the feeding hopper through air delivery pipe one, preheating and drying the material fed into the hopper. Simultaneously, the hot air in the cavity is injected into a pre-reserved groove on the screw shaft through air delivery pipe two, and then dispersed into the interior of the conveying cylinder through through-holes, achieving multi-directional and uniform drying of the material during the conveying process. This drying method ensures that the material maintains a suitable degree of dryness during conveying, avoiding the impact of uneven drying on the performance of polyacrylamide.

[0017] Multiple heating tubes installed on the outer wall of the conveying cylinder can heat and insulate the material inside the cylinder, ensuring that the material is within a suitable temperature range during conveying, which is beneficial for subsequent processing. Meanwhile, the protective cover design not only provides effective protection for the heating tubes, preventing them from being interfered with or damaged by external factors and extending their service life, but also creates a relatively independent space between the conveying cylinder and the protective cover, which is conducive to the circulation and utilization of hot air and improves energy efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point D; Figure 6 for Figure 2 Enlarged schematic diagram of the structure at point E in the middle; Figure 7 This is a schematic diagram of the retaining ring structure of the present invention; Figure 8 This is a schematic diagram of the mobile frame structure of the present invention; Figure 9 This is a schematic diagram of the material conveying cylinder structure of the present invention.

[0019] In the diagram: 1. Feeding cylinder, 101. Servo motor 1, 102. Screw shaft, 103. Bearing 1, 104. Insert, 105. Discharge pipe, 106. Reserved groove, 107. Through hole, 108. Retaining ring, 109. Insertion hole, 110. 2. Protective cover, 201. Servo motor 2, 202. Lead screw, 203. Bearing 2, 204. Guide post, 205. Screw, 206. Nut, 207. Limiting ring, 208. Hand-tightening screw, 209. Connecting block, 210. One-way air inlet valve, 211. Pressure relief valve, 212. Heating tube, 3. Moving frame, 4. Screw hole, 401. Through hole, 402. Mounting groove, 403. Striking block, 404. Spring, 405. Feeding hopper, 5. Cavity, 501. Air pipe 1, 502. Air pipe 2, 503. Air pump, 6. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0021] Example 1, please refer to Figures 1 to 9This invention provides a technical solution: a material conveying device for preparing polyacrylamide, comprising a conveying cylinder 1, a spiral shaft 102 rotatably connected inside the conveying cylinder 1, a feeding hopper 5 installed at the bottom end of the conveying cylinder 1, a servo motor 101 fixed at the top end of the conveying cylinder 1, the top end of the spiral shaft 102 passing through the top plate of the conveying cylinder 1 and being driven and connected to the power output end of the servo motor 101, a bearing 103 sleeved at the bottom end of the spiral shaft 102, the bearing 103 fixed to the bottom plate of the conveying cylinder 1, an insertion port 104 opened at the top of the conveying cylinder 1, a discharge pipe 106 inserted into the insertion port 104, a threaded sleeve 105 screwed onto the outside of the discharge pipe 106, the threaded sleeve 105 fixed to the outer wall of the conveying cylinder 1, a handle fixed at the opening of the threaded sleeve 105, and an external thread on the outer wall of the discharge pipe 106, the external thread engaging with the internal thread of the inner ring of the threaded sleeve 105. The feeding cylinder 1 is installed at the front end of the polyacrylamide production equipment. After the feeding cylinder 1 is installed, the discharge pipe 106 is located at the feeding port of the production equipment. The material for preparing polyacrylamide is fed from the feeding hopper 5 into the feeding cylinder 1, triggering the switch of the servo motor 101. During the process of the servo motor 101 driving the spiral shaft 102 to rotate, the spiral shaft 102 conveys the material for preparing polyacrylamide inside the feeding cylinder 1 upward. After the material for preparing polyacrylamide reaches the top of the feeding cylinder 1, it is fed into the production equipment from the discharge pipe 106.

[0022] In order to fix the protective cover 2 onto the conveyor cylinder 1, the following was proposed: A retaining ring 109 is fixedly fitted on the outer side of the conveying cylinder 1, and the retaining ring 109 seals one end of the protective cover 2. The protective cover 2 is a cylindrical structure with an "L" shaped cross section. Multiple screws 205 are fixed to one end of the protective cover 2. Multiple insertion holes 110 are opened on the surface of the retaining ring 109. The insertion holes 110 and screws 205 correspond one-to-one. After the screws 205 pass through the corresponding insertion holes 110, screw nuts 206 are fitted at the ends. A reserved opening 208 is opened on the outer wall of the protective cover 2. A limiting ring 207 is fixed on the outer wall of the protective cover 2. The limiting ring 207 is fitted on the tube body of the discharge pipe 106. Multiple hand-tightening screws 209 are screwed to the outer wall of the limiting ring 207. The hand-tightening screws 209 pass through the limiting ring 207 and are screwed to the outer wall of the discharge pipe 106.

[0023] Before installing the protective cover 2, screw the discharge pipe 106 into the conveying cylinder 1 to prevent the discharge pipe 106 from extending and affecting the installation of the protective cover 2. After the protective cover 2 is put on from the top of the conveying cylinder 1, push the protective cover 2 down onto the retaining ring 109. At this time, the screw 205 passes through the corresponding insertion hole 110. After the nut 206 is screwed onto the corresponding screw 205, it is locked. At this time, the top plate of the protective cover 2 is tightly pressed against the top plate of the conveying cylinder 1. The conveying cylinder 1 and the protective cover 2 form an annular space, and the protective cover 2 protects the heating pipe 3 on the outer wall of the conveying cylinder 1. After the protective cover 2 is installed, put your hand through the reserved opening 208 and hold the handle. Screw the discharge pipe 106 to extend it out of the reserved opening 208. Then screw the hand screw 209 to clamp the discharge pipe 106 for braking.

[0024] To achieve the goal of driving the striking block 404 to strike the conveying cylinder 1 during the reciprocating movement of the moving frame 4 between the conveying cylinder 1 and the protective cover 2, thereby shaking off the polyacrylamide preparation material near the inner wall of the conveying cylinder 1, the following is proposed: A protective cover 2 is fitted over the top of the feeding cylinder 1. Multiple heating tubes 3 are fixedly fitted over the outside of the feeding cylinder 1, with the heating temperature of the heating tubes 3 being below 80 degrees Celsius. A movable frame 4 is slidably connected between the protective cover 2 and the feeding cylinder 1. A screw 205 is screwed onto the surface of the movable frame 4, with one end of the screw 205 rotatably connected to the end of the protective cover 2. Multiple mounting grooves 403 are formed on the inner ring surface of the movable frame 4. A striking block 404 is inserted into the inside of each mounting groove 403, and a spring 405 is fixed between the striking block 404 and the mounting groove 403. During the reciprocating movement of the movable frame 4 within the feeding cylinder 1 and the protective cover 2, as the spring 405 passes the heating tubes 3, the striking block 404 is compressed into the mounting groove 403 by the heating tubes 3, thus compressing the spring 405. The striking block 404 then passes over the heating tubes 3. Afterwards, the spring 405 rebounds and pushes the striking block 404 to strike the feed cylinder 1; a servo motor 201 is fixed on the top plate of the protective cover 2, and the top end of the lead screw 202 is connected to the power output end of the servo motor 201; a connecting block 210 is fixed on the inner wall of the protective cover 2; a guide post 204 is fixed on the surface of the guide post 204; the guide post 204 passes through the moving frame 4; and a bearing 203 is sleeved on the bottom end of both the guide post 204 and the lead screw 202; the bearing 203 is fixed on the surface of the retaining ring 109; a screw hole 401 and a through hole 402 are opened on the surface of the moving frame 4; the lead screw 202 passes through and is screwed into the screw hole 401; the guide post 204 passes through the through hole 402; the height of the striking block 404 is greater than the thickness of the heating tube 3; and the end of the striking block 404 extending out of the mounting groove 403 has a frustum structure.

[0025] Servo motor 201 employs dual drive motors. Servo motor 201 is pre-programmed to switch between forward and reverse rotation of the lead screw 202. After the moving frame 4 moves from the retaining ring 109 to the top of the feed cylinder 1, the program switches to drive the lead screw 202 to move the moving frame 4 from the top of the feed cylinder 1 to above the retaining ring 109, repeating this process. During the movement of the moving frame 4, when spring 405 is in its initial state, spring 405 supports the striking block 404, causing one end of the striking block 404 to contact the outer wall of the feed cylinder 1. When the striking block 404 moves to... The heating tube 3 continues to move forward after moving to one side. The heating tube 3 pushes the striking block 404 into the mounting groove 403. The striking block 404 retracts into the mounting groove 403 and compresses the spring 405 elastically. After the striking block 404 passes the heating tube 3, the spring 405 rebounds and pushes the striking block 404 back. The striking block 404 rebounds and strikes the conveying cylinder 1. The multiple heating tubes 3 arranged on the outer wall of the conveying cylinder 1 not only meet the requirements of heating and heat preservation of the material inside the conveying cylinder 1, but also cooperate with the striking block 404 to complete the striking work, so as to shake off the polyacrylamide preparation material close to the inner wall of the conveying cylinder 1.

[0026] To achieve uniform drying of the material used in the preparation of polyacrylamide from inside the feed cylinder 1, the following proposed method is proposed: The feeding hopper 5 has an internal cavity 501. A pre-drilled groove 107 is formed on the surface of the screw shaft 102, and multiple through holes 108 are formed on the surface of the pre-drilled groove 107. A first air supply pipe 502 is inserted and fixed to the surface of the retaining ring 109, with one end of the first air supply pipe 502 inserted into the cavity 501. A second air supply pipe 503 is inserted and fixed to the surface of the feeding hopper 5, with one end of the second air supply pipe 503 penetrating the bottom plate of the conveying cylinder 1 and then inserting into the pre-drilled groove 107. High-temperature gas between the protective cover 2 and the conveying cylinder 1 is transported through the pre-drilled groove 107. After the gas pipe 502 is injected into the cavity 501, the gas flows through the gas pipe 503 and is injected into the reserved groove 107 before being discharged through the through hole 108. A one-way air inlet valve 211 is inserted and fixed to the surface of the retaining ring 109. A pressure relief valve 212 is inserted and fixed to the top plate of the conveying cylinder 1. An air pump 6 is fixed to the top plate of the conveying cylinder 1. The air outlet pipe of the air pump 6 passes through the top plate of the conveying cylinder 1 and extends into the space between the conveying cylinder 1 and the protective cover 2. The cavity 501 is an annular groove, and the top end of the gas pipe 503 is inserted into the cavity 501.

[0027] When the air pump 6 is triggered, it injects air into the annular space between the conveying cylinder 1 and the protective cover 2. During the process of heating and keeping the conveying cylinder 1 warm by the heating pipe 3, the heating pipe 3 also heats the air in the annular space. After being heated, the air is injected into the cavity 501 through the first air supply pipe 502. The feeding hopper 5 is heated by the gas inside the cavity 501, which achieves a certain degree of drying effect on the polyacrylamide preparation material fed into the feeding hopper 5. The hot air inside the cavity 501 is injected into the reserved groove 107 through the second air supply pipe 503, and dispersed into the polyacrylamide preparation material inside the conveying cylinder 1 through the through hole 108, so as to achieve multi-directional drying of the polyacrylamide preparation material inside the conveying cylinder 1. When the air pressure between the conveying cylinder 1 and the protective cover 2 is too high, the pressure is released through the pressure relief valve 212.

[0028] Example 2, based on Example 1, proposes an operation method for a material conveying device for polyacrylamide preparation, including the following steps: Material conveying: Install the conveying cylinder 1 at the front end of the polyacrylamide production equipment, ensuring that the discharge pipe 106 is positioned at the feeding port of the production equipment. Feed the polyacrylamide preparation material from the feeding hopper 5 into the conveying cylinder 1. Trigger the switch of the servo motor 101; the servo motor 101 drives the screw shaft 102 to rotate. The screw shaft 102 conveys the polyacrylamide preparation material inside the conveying cylinder 1 upwards. After reaching the top of the conveying cylinder 1, the material is discharged from the discharge pipe 106 into the production equipment.

[0029] Installation of the protective cover: Before installing the protective cover 2, screw the discharge pipe 106 into the conveying cylinder 1 to prevent the discharge pipe 106 from protruding and affecting the installation of the protective cover 2. Slide the protective cover 2 onto the top of the conveying cylinder 1 and push it down onto the retaining ring 109. At this time, the screw 205 passes through the corresponding insertion hole 110. Screw the nut 206 onto the corresponding screw 205 and tighten it. At this time, the top plate of the protective cover 2 is tightly pressed against the top plate of the conveying cylinder 1, and an annular space is formed between the conveying cylinder 1 and the protective cover 2. The protective cover 2 also protects the heating pipe 3 on the outer wall of the conveying cylinder 1. After the protective cover 2 is installed, hold the handle through the reserved opening 208, screw the discharge pipe 106 out of the reserved opening 208, and then screw the hand screw 209 to clamp the discharge pipe 106 for braking.

[0030] Material dropping: Servo motor 201 is pre-programmed to allow it to drive the lead screw 202 to switch between forward and reverse rotation, enabling the moving frame 4 to reciprocate between the retaining ring 109 and the top of the conveying cylinder 1. Triggering the switch of servo motor 201 causes it to drive the lead screw 202 to rotate, which in turn causes the moving frame 4 to reciprocate within the conveying cylinder 1 and the protective cover 2. During the movement of the moving frame 4, when the spring 405 is in its initial state, the top support knocking block 404 makes one end of it contact the outer wall of the conveying cylinder 1; when the knocking block 404 moves to one side of the heating tube 3 and continues to move forward, the heating tube 3 pushes the knocking block 404 into the mounting groove 403, and the knocking block 404 retracts into the mounting groove 403 to compress the spring 405 elastically; when the knocking block 404 passes the heating tube 3, the spring 405 rebounds and pushes the knocking block 404 back, and the knocking block 404 rebounds and knocks the conveying cylinder 1, thereby shaking off the polyacrylamide preparation material close to the inner wall of the conveying cylinder 1.

[0031] Material Drying: The air pump 6 is activated, injecting air into the annular space between the conveying cylinder 1 and the protective cover 2. The heating pipe 3 heats and maintains the temperature of the conveying cylinder 1 while simultaneously heating the air in the annular space. The heated air is then injected into the cavity 501 through the first air supply pipe 502. The feeding hopper 5 is heated by the gas inside the cavity 501, thus drying the polyacrylamide preparation material fed into the feeding hopper 5 to a certain extent. The hot air inside the cavity 501 is injected into the reserved groove 107 through the second air supply pipe 503 and dispersed into the polyacrylamide preparation material inside the conveying cylinder 1 through the through hole 108, achieving multi-directional drying of the polyacrylamide preparation material from inside the conveying cylinder 1. When the air pressure between the conveying cylinder 1 and the protective cover 2 is too high, the pressure is released through the pressure relief valve 212.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material conveying device for preparing polyacrylamide, comprising a conveying cylinder (1), a spiral shaft (102) rotatably connected inside the conveying cylinder (1), and a feeding hopper (5) installed at the bottom end of the conveying cylinder (1), characterized in that: The top of the feeding cylinder (1) is fitted with a protective cover (2), and multiple heating tubes (3) are fixedly fitted on the outside of the feeding cylinder (1). A movable frame (4) is slidably connected between the protective cover (2) and the feeding cylinder (1). A screw (205) is screwed onto the surface of the movable frame (4). One end of the screw (205) is rotatably connected to the end of the protective cover (2). Multiple mounting slots (403) are opened on the inner ring surface of the movable frame (4). A striking block (404) is inserted into the inside of the mounting slot (403). A spring (405) is fixed between the striking block (404) and the mounting slot (403). During the process of the lead screw (202) driving the moving frame (4) to reciprocate inside the feed cylinder (1) and the protective cover (2), when the spring (405) passes the heating tube (3), the striking block (404) is squeezed into the mounting groove (403) by the heating tube (3) to compress the spring (405). After the striking block (404) passes the heating tube (3), the spring (405) rebounds and pushes the striking block (404) to strike the feed cylinder (1). A retaining ring (109) is fixedly fitted on the outside of the feeding cylinder (1). The retaining ring (109) seals one end of the protective cover (2). A cavity (501) is opened inside the feeding hopper (5). A reserved groove (107) is opened on the surface of the screw shaft (102). Multiple through holes (108) are opened on the surface of the reserved groove (107). An air supply pipe (502) is inserted and fixed on the surface of the retaining ring (109). One end of the air supply pipe (502) is inserted into the... The feed hopper (5) is connected to the surface of the cavity (501) and the second gas pipe (503) is inserted and fixed. One end of the second gas pipe (503) passes through the bottom plate of the feed cylinder (1) and is inserted into the reserved groove (107). The high temperature gas between the protective cover (2) and the feed cylinder (1) is injected into the cavity (501) through the first gas pipe (502), and the gas flows through the second gas pipe (503) into the reserved groove (107) and then dissipates through the through hole (108).

2. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The top of the feeding cylinder (1) is fixed with a servo motor (101). The top of the spiral shaft (102) passes through the top plate of the feeding cylinder (1) and is connected to the power output end of the servo motor (101). The bottom end of the spiral shaft (102) is fitted with a bearing (103). The bearing (103) is fixed on the bottom plate of the feeding cylinder (1). The top of the feeding cylinder (1) is provided with an insertion port (104). The insertion port (104) is connected to the inside of the insertion port (104). The outside of the insertion port (106) is fitted with a threaded sleeve (105). The threaded sleeve (105) is fixed to the outer wall of the feeding cylinder (1). A handle is fixed at the opening of the threaded sleeve (105). The outer wall of the insertion port (106) is provided with an external thread. The external thread and the internal thread of the inner ring of the threaded sleeve (105) are connected in a cooperative manner.

3. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The protective cover (2) has an L-shaped cylindrical structure. One end of the protective cover (2) is fixed with multiple screws (205). The surface of the retaining ring (109) is provided with multiple insertion holes (110). The insertion holes (110) and screws (205) correspond one to one. After the screws (205) pass through the corresponding insertion holes (110), a screw nut (206) is sleeved at the end.

4. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The surface of the retaining ring (109) is fixed with a one-way air inlet valve (211), the top plate of the conveying cylinder (1) is fixed with a pressure relief valve (212), and the top plate of the conveying cylinder (1) is fixed with an air pump (6). The air outlet pipe of the air pump (6) passes through the top plate of the conveying cylinder (1) and extends into the space between the conveying cylinder (1) and the protective cover (2). The cavity (501) is an annular groove, and the top end of the second air pipe (503) is inserted into the cavity (501).

5. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The outer wall of the protective cover (2) is provided with a reserved opening (208). A limiting ring (207) is fixed on the outer wall of the protective cover (2). The limiting ring (207) is sleeved on the tube body of the discharge pipe (106). Multiple hand-tightening screws (209) are screwed to the outer wall of the limiting ring (207). The hand-tightening screws (209) pass through the limiting ring (207) and are screwed to the outer wall of the discharge pipe (106).

6. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: Servo motor 2 (201) is fixed on the top plate of the protective cover (2). The top end of the lead screw (202) is connected to the power output end of the servo motor 2 (201). A connecting block (210) is fixed on the inner wall of the protective cover (2). A guide post (204) is fixed on the surface of the guide post (204). The guide post (204) passes through the moving frame (4). The bottom ends of the guide post (204) and the lead screw (202) are both fitted with bearing 2 (203). The bearing 2 (203) is fixed on the surface of the retaining ring (109).

7. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The surface of the movable frame (4) is provided with screw holes (401) and through holes (402), the lead screw (202) passes through and is screwed into the screw hole (401), and the guide post (204) passes through the through hole (402).

8. The material conveying device for polyacrylamide preparation according to claim 1, characterized in that: The height of the striking block (404) is greater than the thickness of the heating tube (3), and the end of the striking block (404) extending out of the mounting groove (403) has a frustum structure.

9. A method for operating a material conveying device for polyacrylamide preparation, used in the material conveying device for polyacrylamide preparation according to any one of claims 1-8, characterized in that: The operation method includes the following steps: After the screw shaft (102) is started, the screw shaft (102) conveys the polyacrylamide preparation material fed from the feeding hopper (5) upward. After the material is conveyed through the protective cover (2), it is fed into the production equipment through the discharge pipe (106). During this process, the heating pipe (3) is turned on. After the heating pipe (3) is working, it generates heat to heat the conveying cylinder (1). The conveying cylinder (1) keeps the polyacrylamide preparation material conveyed inside warm and dries it. The high temperature gas between the protective cover (2) and the conveying cylinder (1) is injected into the reserved groove (107) through the gas pipe one (502) and the gas pipe two (503). The gas is dispersed into the interior of the conveying cylinder (1) through the through hole (108), so that the polyacrylamide preparation material inside the conveying cylinder (1) is dried evenly. At the same time, the lead screw (202) is started. The lead screw (202) drives the moving frame (4) to move back and forth between the feed cylinder (1) and the protective cover (2). During this process, the striking block (404) repeatedly strikes the feed cylinder (1) to shake off the polyacrylamide preparation material close to the inner wall of the feed cylinder (1).

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