Pressure control system for production standby state of foaming line
By designing a pressure control system including a mainframe frame, a mainframe, a screw extruder and a hydraulic control mechanism, the problem of the difficulty of precise control of the pressure in the standby state of traditional pressure control systems is solved, and more efficient and stable foaming is achieved Line production reduces waste generation.
Patent Information
- Application Number
- CN202411849082.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-02-11
AI Technical Summary
During the foam line production process, the pressure of the traditional pressure control system is difficult to accurately control in standby state, resulting in low production efficiency, unstable quality of foamed materials, and a lot of waste, which increases the waste of manpower and material resources.
A pressure control system including a mainframe frame, a mainframe, a screw extruder and a hydraulic control mechanism is designed. The hydraulic control mechanism can accurately control the pressure at the discharge port through the combination of an overflow valve, a hydraulic cylinder and a valve core, ensuring that the main machine quickly switches from standby to working state and produces qualified products.
By precisely controlling pressure, waste of materials and manpower in standby state is reduced, production efficiency and the quality of foamed materials are improved, waste generation is reduced, and overall production stability and efficiency are improved.
Smart Images
Figure CN119408114A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field related to foaming, and specifically discloses a pressure control system in a foaming line production standby state. Background Art
[0002] During the foaming line production process, it is necessary to maintain a certain pressure on the melt from the extruder to the die head so that a certain degree of foaming can be achieved when the product is formed. In the actual production process, there are often temporary line stops for changing reels, maintenance, etc. The traditional method uses an overflow valve to discharge the molten material extruded by the extruder. At this time, the internal pressure of the extruder is released. When production resumes, it is necessary to maintain pressure again, which reduces production efficiency and leads to unstable quality of the foamed material, resulting in more waste and a waste of manpower and material resources.
[0003] The existing foaming line pressure control has some shortcomings, such as low pressure control accuracy, poor stability, and complex operation. These problems not only affect the production quality and efficiency of the foaming line, but also increase production costs and maintenance difficulties. In addition, when the raw materials are added, small lumps will appear due to the wrapping properties. The small lumps affect the heating during the processing process, thereby affecting the foaming quality. Therefore, we need to make improvements on this. Summary of the invention
[0004] The purpose of the present invention is to solve the problems existing in the background technology, and a pressure control system in a foaming line production standby state is proposed, comprising a main frame and a main machine, a controller is arranged on the upper surface of one end of the main frame, a main machine gear box is arranged at the end of the main frame away from the controller, a main machine motor is installed at the lower part of the main machine gear box, the main machine is arranged above the controller, a screw extruder is arranged inside the main machine, a feeding mechanism is arranged above the screw extruder, and a hydraulic control mechanism is installed at the discharge port at the end of the screw extruder away from the main machine gear box; The hydraulic control mechanism can control the pressure at the discharge port, so that when the host machine switches from the standby state to the working state, it can quickly produce qualified products, avoiding unnecessary waste of materials and manpower; The screw extruder also includes a screw barrel and a screw rod. The screw rod is rotatably arranged inside the screw barrel. One end of the screw rod penetrates the inside of the screw barrel and is connected to a main gear box. A cooling water inlet and outlet are arranged inside the screw barrel.
[0005] Preferably, the hydraulic control mechanism includes an overflow valve connected and installed at the discharge port at one end of the screw extruder away from the main gear box, a hydraulic cylinder is arranged at the lower part of the overflow valve, the telescopic end of the hydraulic cylinder is connected to a valve core, one end of the valve core seals and slides inside the overflow valve, a locking block is arranged on the side of the overflow valve away from the discharge port, a machine head is arranged at the end of the locking block away from the overflow valve, a support column is arranged at the lower end of the machine head, a moving component is arranged on the outer side of the support column, and a pressure measuring mechanism is installed on the outer side of the machine head.
[0006] Preferably, the feeding mechanism includes a connecting bucket installed above the interior of the spiral drum, a support frame is fixedly installed above the connecting bucket, tracks are fixedly installed on both sides of the upper surface of the support frame, two groups of tracks are symmetrically provided with sliders on the outside, a feeding hopper is commonly provided on the upper surfaces of four groups of sliders, a drop opening corresponding to the feeding hopper and the connecting bucket is opened inside the support frame, inclined plates are fixedly installed on both sides of the inner wall of the feeding hopper and close to the drop opening, a groove is opened on the surface of the support frame away from the connecting bucket, guide plates are provided on both sides of the feed hopper, and a rotating barrel is rotatably installed inside the feed hopper and between the two guide plates.
[0007] Preferably, strip openings are provided at equal intervals inside the rotating barrel along the circumferential direction, and a rotating shaft is rotatably installed inside the feed hopper and located inside the rotating barrel.
[0008] Preferably, the moving assembly includes a frame fixedly installed at the lower outer side of the support column, the four outer corners of the frame are fixedly provided with connecting seats, a moving wheel is fixedly provided inside the end of the connecting seat away from the frame, and a support rod is provided at the front end of the outer side of the frame.
[0009] Preferably, an overflow port is provided inside the valve core, the flow channel inside the overflow port is bent, the front section of the overflow port has a smaller diameter, and the rear section has a larger diameter, and a direct current channel is provided inside the overflow valve and at the overflow port.
[0010] Preferably, a plurality of connecting rods are arranged on the outside of the rotating shaft, and a crushing head is arranged at the ends of the plurality of connecting rods. One end of the rotating shaft passes through the rotating barrel and the outside of the feed hopper in sequence, and a second motor is arranged at the end, and the second motor is fixedly connected to the outside of the feed hopper.
[0011] Preferably, a first motor is arranged on the outside of one end of the rotating barrel, the first motor is fixedly mounted on the outside of one end of the feed hopper away from the second motor, and a plurality of heating devices are arranged on one side of the interior of the main machine.
[0012] Compared with the prior art, the present invention has the following beneficial effects: By setting up the feeding assembly, the small lumps in the raw materials can be fully processed, so that they can be more fully heated when rotating inside the spiral drum later.
[0013] Through the hydraulic control mechanism, the pressure of the heated liquid medium can be controlled at the discharge port. The valve core has two channels, one of which is a straight-through channel. By controlling the valve core, when the direct current channel is aligned with the discharge port, the melt flows through the flow head and passes through the overflow port on the lower side of the valve core. The front section of the overflow port is a tiny flow channel port, and the rear section is a fully open flow channel port. In the working state, the controller can calculate the data fed back by the pressure measuring mechanism at the screw extruder and the head, and then control the rotation speed of the screw extruder according to the use requirements, so as to adjust the melt pressure. At the same time, the controller can also control the extension and contraction of the hydraulic cylinder and adjust the position of the valve core to achieve the pressure difference between the screw extruder and the head melt to meet various working requirements. In the overflow state, the hydraulic cylinder drives the valve core so that the overflow port of the valve core is connected to the flow channel of the discharge port of the screw extruder. The extension and contraction of the cylinder is calculated according to the pressure of the hydraulic cylinder to achieve overflow state pressure maintenance control. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 It is a schematic diagram of the connection structure between the overflow valve and the hydraulic cylinder of the present invention; Figure 4 This is a schematic diagram of the valve core connection structure of the present invention; Figure 5 This is a schematic diagram of the flow channel connection structure inside the valve core of the present invention; Figure 6 This is a schematic diagram of the connection structure of the inner part of the feed hopper of the present invention; Figure 7 It is a schematic diagram of the split structure between the rotating barrel and the rotating shaft of the present invention.
[0015] In the figure: 1. main machine frame; 2. main machine motor; 3. controller; 4. support rod; 5. main machine gear box; 6. screw extruder; 7. feed hopper; 8. heating device; 9. main machine; 10. machine head; 11. support column; 12. shift wheel; 13. frame; 14. air injection port; 15. overflow valve; 16. hydraulic cylinder; 17. lock block; 18. valve core; 19. overflow port; 20. rotating barrel; 21. guide plate; 22. first motor; 23. inclined plate; 24. track; 25. support frame; 26. notch; 27. slide block; 28. connecting bucket; 29. second motor; 30. crushing head; 31. strip mouth; 32. connecting rod; 33. rotating shaft; 34. connecting seat; 35. DC channel. DETAILED DESCRIPTION
[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0018] like Figure 1-Figure 7 A pressure control system in a foaming line production standby state is shown, comprising a main frame 1 and a main frame 9, a controller 3 is arranged on the upper surface of one end of the main frame 1, a main frame gear box 5 is arranged at the end of the main frame 1 away from the controller 3, a main frame motor 2 is installed at the lower part of the main frame gear box 5, the main frame 9 is arranged above the controller 3, a screw extruder 6 is arranged inside the main frame 9, a feeding mechanism is arranged above the screw extruder 6, and a hydraulic control mechanism is installed at the discharge port at the end of the screw extruder 6 away from the main frame gear box 5; The hydraulic control mechanism can control the pressure at the discharge port, so that the host machine 9 can quickly produce qualified products in the standby state, avoiding unnecessary waste of materials and manpower; The screw extruder 6 also includes a screw barrel and a screw, the screw is rotatably arranged inside the screw barrel, one end of the screw passes through the inside of the screw barrel and is connected to the main gear box 5, and a cooling water inlet and outlet 14 is arranged inside the screw barrel; The cooling water inlet and outlet 14 can quickly cool down and harden the raw materials; A basic structure gas injection port is set in the middle and rear section of the spiral drum. Gas is injected after the material is fully melted. The gas injection port can be connected to an external air pressure detection probe. By adding an external air pressure control valve, the air pressure inside the spiral drum can be controlled. The main engine motor 2 drives the screw inside the screw extruder 6 to rotate through the main engine gear box 5, so as to push the raw materials inside the spiral barrel.
[0019] The hydraulic control mechanism includes a relief valve 15 connected and installed at the discharge port of the end of the screw extruder 6 away from the main gear box 5, a hydraulic cylinder 16 is arranged below the relief valve 15, a valve core 18 is connected to the telescopic end of the hydraulic cylinder 16, one end of the valve core 18 is sealed and slid inside the relief valve 15, a locking block 17 is arranged on the side of the relief valve 15 away from the discharge port, a machine head 10 is arranged at the end of the locking block 17 away from the relief valve 15, a support column 11 is arranged at the lower end of the machine head 10, a moving component is arranged on the outer side of the support column 11, and a pressure measuring mechanism is installed on the outer side of the machine head 10; Reference Manual Attached Figure 1 , Figure 2 , Figure 3It can be seen that the housing of the hydraulic cylinder 16 is fixed on the valve body of the relief valve 15 , and is connected to the valve core 18 through the provided expansion joint to control the use of the valve core 18 .
[0020] The feeding mechanism includes a connecting bucket 28 connected and installed above the inner part of the spiral drum, a support frame 25 is fixedly installed above the connecting bucket 28, tracks 24 are fixedly installed on both sides of the upper surface of the support frame 25, sliders 27 are symmetrically installed on the outside of the two groups of tracks 24, and a feeding bucket 7 is commonly installed on the upper surface of the four groups of sliders 27. A drop opening corresponding to the feeding bucket 7 and the connecting bucket 28 is opened inside the support frame 25, and inclined plates 23 are fixedly installed on both sides of the inner wall of the feeding bucket 7 and near the drop opening. A notch 26 is opened on the surface of one side of the support frame 25 away from the connecting bucket 28, guide plates 21 are installed on both sides of the inner part of the feeding bucket 7, and a rotating barrel 20 is rotatably installed inside the feeding bucket 7 and between the two guide plates 21; Reference Manual Attached Figure 5 It can be seen that the feed hopper 7 can move horizontally above the support frame 25 by means of the slider 27. When feeding, the feed hopper 7 corresponds to the feeding opening at the connecting hopper 28. When inspecting the inside of the feed hopper 7, in order to prevent the raw materials from falling into the spiral drum, the feed hopper 7 can be pushed to the slot 26; The guide plate 21 and the inclined plate 23 can better guide the raw materials into the connecting bucket 28, thereby allowing the screw extruder 6 to operate.
[0021] The moving assembly includes a frame 13 fixedly installed at the lower outer side of the support column 11, and the four corners of the outer side of the frame 13 are fixedly provided with connecting seats 34, and the end of the connecting seat 34 away from the frame 13 is fixedly provided with a moving wheel 12, and the front end of the outer side of the frame 13 is provided with a supporting rod 4; Reference Manual Attached Figure 1 and Figure 2 It can be seen that the support rod 4, the transfer wheel 12, the support column 11, the frame 13, and the connecting seat 34 can form a movable machine head trolley, which can be more flexible when used.
[0022] An overflow port 19 is provided inside the valve core 18. The flow channel inside the overflow port 19 is bent, and the front section of the overflow port 19 has a smaller diameter, while the rear section has a larger diameter. A direct flow channel 35 is provided inside the overflow valve 15 and at the overflow port 19. Reference Manual Attached Figure 4 and Figure 5It can be seen that the upper section of the flow channel inside the overflow port 19 is narrower, and the lower section is wider. Then, under the extension and contraction of the hydraulic cylinder 16, the valve core 18 is driven by the extension and contraction of the hydraulic cylinder 16, so that the valve core 18 moves up and down, causing the overflow port 19 and the liquid in the discharge port flow channel to be in a variety of staggered states, and the medium flowing inside the flow channel is slightly aligned, partially aligned, and completely aligned. The medium flows out from the overflow port 19. At this time, the pressure measuring mechanism can detect the internal pressure of the host 9, and send the data to the hydraulic cylinder 16 through the external computer program. The hydraulic cylinder 16 can control the valve core 18 and adjust the size of the flow channel to ensure that the internal pressure of the host 9 is as stable as possible to the working pressure, and the waiting production line starts to work, so as to quickly meet the rapid production qualification requirements of the foaming line after standby. The direct flow channel 35 facilitates the flow of liquid medium in a normal working state.
[0023] Strip openings 31 are provided at equal intervals in the circumferential direction inside the rotating barrel 20, a rotating shaft 33 is rotatably installed inside the feed hopper 7 and located inside the rotating barrel 20, a plurality of connecting rods 32 are arranged outside the rotating shaft 33, and a crushing head 30 is arranged at the ends of the plurality of connecting rods 32, one end of the rotating shaft 33 passes through the rotating barrel 20 and the outside of the feed hopper 7 in sequence, and a second motor 29 is arranged at the end, and the second motor 29 is fixedly connected to the outside of the feed hopper 7, a first motor 22 is arranged outside one end of the rotating barrel 20, and the first motor 22 is fixedly installed outside one end of the feed hopper 7 and away from the second motor 29, and a plurality of heating devices 8 are arranged on one side inside the main machine 9; Reference Manual Attached Figure 1 , Figure 2 , Figure 6 , Figure 7 It can be seen that the first motor 22 can directly drive the rotating barrel 20 to rotate, while the second motor 29 drives the rotating shaft 33 and the external multiple groups of crushing heads 30 to rotate. The small lumps enter the rotating barrel 20 through the strip-shaped opening 31, and then contact the rotating crushing heads 30, thereby crushing the small lumps.
[0024] Working principle: the raw material can enter the spiral barrel of the screw extruder 6 from the feed hopper 7. The first motor 22 and the second motor 29 are driven inside the feed hopper 7 to cause the rotating barrel 20 and the rotating shaft 33 to rotate in opposite directions. The finely crushed raw material falls directly into the connecting bucket 28 through the strip opening 31, and the small agglomerates are squeezed between the rotating barrel 20 and the guide plate 21. After some small agglomerates enter through the corresponding strip opening 31, the rotation of the reverse rotating shaft 33 causes the multiple groups of crushing heads 30 on the outer side of the rotating shaft 33 to be continuously squeezed and crushed, and then when entering the spiral barrel for heating, the raw material can be more fully processed by the heating device 8 from the spiral The foaming medium formed at the discharge port of the barrel flows into the overflow valve 15. The pressure of the heated liquid medium can be controlled at the discharge port by means of the provided hydraulic cylinder 16. In the working state, the controller 3 can calculate the data fed back by the pressure measuring mechanism at the screw extruder 6 and the die head 10 through an external computer program, and then control the rotation speed of the screw of the screw extruder 6 according to the use requirements, so as to adjust the pressure of the melt. In the overflow standby state, the hydraulic cylinder 16 can also be driven to move upward, so that the overflow port 19 at the valve core 18 is aligned with the flow channel of the discharge port, and the expansion and contraction amount of the cylinder is calculated according to the pressure of the hydraulic cylinder 16, so as to realize the pressure maintaining control in the overflow state.
[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.
Claims
1. A pressure control system in a foaming line production standby state, comprising a main frame (1) and a main machine (9), characterized in that: A controller (3) is arranged on the upper surface of one end of the main machine frame (1); a main machine gear box (5) is arranged at the end of the main machine frame (1) away from the controller (3); a main machine motor (2) is installed at the lower part of the main machine gear box (5); the main machine (9) is arranged above the controller (3); a screw extruder (6) is arranged inside the main machine (9); a feeding mechanism is arranged at the upper part of the screw extruder (6); and a hydraulic control mechanism is installed at the discharge port of the end of the screw extruder (6) away from the main machine gear box (5); The hydraulic control mechanism can control the pressure at the discharge port, so that when the main machine (9) switches from the standby state to the working state, it can quickly produce qualified products, thereby avoiding unnecessary waste of materials and manpower; The screw extruder (6) further comprises a screw barrel and a screw, wherein the screw is rotatably arranged inside the screw barrel, one end of the screw passes through the inside of the screw barrel and is connected to a main engine gear box (5), and a cooling water inlet and outlet (14) are arranged inside the screw barrel.
2. A pressure control system in a foaming line production standby state according to claim 1, characterized in that: The hydraulic control mechanism comprises a relief valve (15) connected and installed at a discharge port at one end of the screw extruder (6) away from the main engine gear box (5); a hydraulic cylinder (16) is arranged below the relief valve (15); a valve core (18) is connected to the telescopic end of the hydraulic cylinder (16); one end of the valve core (18) is sealed and slid inside the relief valve (15); a locking block (17) is arranged on the side of the relief valve (15) away from the discharge port; a machine head (10) is arranged at the end of the locking block (17) away from the relief valve (15); a support column (11) is arranged at the lower end of the machine head (10); a moving component is arranged on the outer side of the support column (11); and a pressure measuring mechanism is installed on the outer side of the machine head (10).
3. The pressure control system in the foaming line production standby state according to claim 1, characterized in that: The feeding mechanism comprises a connecting bucket (28) connected and installed above the inner part of the spiral drum, a support frame (25) is fixedly installed above the connecting bucket (28), tracks (24) are fixedly installed on both sides of the upper surface of the support frame (25), two groups of tracks (24) are symmetrically provided with sliders (27) on the outside, and a feeding bucket (7) is commonly provided on the upper surface of the four groups of sliders (27), a feeding bucket (7) is provided inside the support frame (25) with a material drop opening corresponding to the feeding bucket (7) and the connecting bucket (28), inclined plates (23) are fixedly installed on both sides of the inner wall of the feeding bucket (7) and near the material drop opening, a groove (26) is provided on the surface of one side of the support frame (25) away from the connecting bucket (28), guide plates (21) are provided on both sides of the inner part of the feeding bucket (7), and a rotating barrel (20) is rotatably installed inside the feeding bucket (7) and between the two guide plates (21).
4. A pressure control system in a foaming line production standby state according to claim 3, characterized in that: The rotating barrel (20) is provided with strip-shaped openings (31) at equal intervals along the circumferential direction, and a rotating shaft (33) is rotatably mounted inside the feed hopper (7) and located inside the rotating barrel (20).
5. A pressure control system in a foaming line production standby state according to claim 2, characterized in that: The moving assembly comprises a frame (13) fixedly mounted on the lower outer side of a support column (11), connecting seats (34) being fixedly arranged at four outer corners of the frame (13), a moving wheel (12) being fixedly arranged inside one end of the connecting seat (34) away from the frame (13), and a supporting rod (4) being arranged at the outer front end of the frame (13).
6. A pressure control system in a foaming line production standby state according to claim 2, characterized in that: An overflow port (19) is provided inside the valve core (18), the flow channel inside the overflow port (19) is bent, the front section of the overflow port (19) has a smaller diameter, and the rear section has a larger diameter, and a direct flow channel (35) is provided inside the overflow valve (15) and at the overflow port (19).
7. A pressure control system in a foaming line production standby state according to claim 4, characterized in that: A plurality of connecting rods (32) are arranged outside the rotating shaft (33), and a crushing head (30) is arranged at the end of each of the plurality of connecting rods (32). One end of the rotating shaft (33) passes through the rotating barrel (20) and the outside of the feed hopper (7) in sequence, and a second motor (29) is arranged at the end thereof. The second motor (29) is fixedly connected to the outside of the feed hopper (7).
8. A pressure control system in a foaming line production standby state according to claim 7, characterized in that: A first motor (22) is disposed on the outside of one end of the rotating barrel (20), and the first motor (22) is fixedly mounted on the outside of one end of the feed hopper (7) away from the second motor (29). A plurality of heating devices (8) are disposed on one side of the interior of the main machine (9).