Feeding device for materials easy to harden

Abstract

The utility model relates to a feeding device for materials easy to harden, which is applied to the technical field of feeding equipment and comprises a metering bin, a transition hopper, a feeding bin, a first material sealing screw conveyor and a discharging pipe. When the device is used, the discharging pipe is closed through the ball valve, the inlet of the metering bin is closed through the valve at the top of the metering bin, the exhaust valve on the first material sealing screw conveyor is opened, nitrogen is introduced into the device through the first nitrogen inlet and the second nitrogen inlet, and air in the device is extruded out to the exhaust valve to be exhausted. According to the feeding device, the air in the feeding device is replaced, then the materials are conveyed into the metering bin, due to the fact that the circulation space of the whole device is filled with the nitrogen, the air content is extremely low, the probability that the materials react with the air to cause hardening is reduced, the circulation fluency of the materials in the feeding device is improved as much as possible, and the feeding efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding equipment, in particular to a feeding device for materials that are prone to hardening. Background Art

[0002] Powders are widely used in production and processing, and are generally loaded through loading devices.

[0003] Because some powders are easily reacted with the air in the feeding device during transportation, resulting in compaction. For example, when phosphorus pentoxide comes into contact with humid air, it may absorb moisture and form agglomerates, causing blockage of the feeding device pipeline and affecting processing efficiency.

[0004] In view of this, there is an urgent need for a feeding device for materials that are prone to hardening to solve the above problems. Summary of the Invention

[0005] In order to help solve the problems existing in the prior art, the utility model provides a feeding device for materials that are easy to harden, which adopts the following technical solution: it includes: a metering silo, a transition hopper, a feeding silo, a first material-sealed screw conveyor and a discharge pipe. The metering silo, the transition hopper, the feeding silo, the first material-sealed screw conveyor and the discharge pipe are arranged in sequence from top to bottom and connected. A ball valve is provided on the discharge pipe, a first nitrogen inlet is provided on the metering silo, a second nitrogen inlet is provided on the discharge pipe, and an exhaust valve is provided on the first material-sealed screw conveyor.

[0006] It is further characterized in that

[0007] The inlet of the transition hopper is provided with a first butterfly valve, and the outlet of the transition hopper is provided with a second butterfly valve.

[0008] A weight loss scale is provided in the metering silo.

[0009] A low material level meter is provided in the feeding silo.

[0010] A pressure equalizing pipe is provided between the top of the transition hopper and the top of the metering silo.

[0011] The discharge port of the metering silo is provided with a second material-sealing screw conveyor, and the second material-sealing screw conveyor is used to convey the material in the metering silo to the transition hopper.

[0012] A flexible hose is provided between the discharge port of the second material sealing screw conveyor and the feed port of the transition hopper.

[0013] The discharge port of the first material sealing screw conveyor is arranged on the side of the discharge pipe, a clearing piston is arranged in the discharge pipe, a cylinder is arranged at the top of the discharge pipe, and the output end of the cylinder is connected to the clearing piston.

[0014] A cylinder bracket is provided on the discharge pipe, and the cylinder is provided on the cylinder bracket.

[0015] A sealing component is provided between the cylinder and the discharge pipe.

[0016] The above structure of the utility model can achieve the following beneficial effects:

[0017] When in use, the discharge pipe is closed by the ball valve, the inlet of the metering silo is sealed by the valve on the top of the metering silo, the exhaust valve on the first material sealing screw conveyor is opened, and nitrogen is introduced into the device through the first nitrogen inlet and the second nitrogen inlet to squeeze the air in the device to the exhaust valve for discharge, thereby completing the replacement of the air inside the device, and then the material is transported to the metering silo. Since the circulation space of the entire device is filled with nitrogen, the air content is extremely small, which reduces the probability of material and air reacting to cause compaction, and improves the smoothness of the material flow in the feeding device as much as possible, which is conducive to improving the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a structural diagram of the discharge pipe in the utility model.

[0020] Figure numerals: 1. Measuring silo; 11. First nitrogen inlet; 12. Weight loss scale; 2. Transition hopper; 21. First butterfly valve; 22. Second butterfly valve; 3. Feeding silo; 31. Low material level meter; 4. First material seal screw conveyor; 5. Discharge pipe; 51. Ball valve; 52. Second nitrogen inlet; 53. Cylinder bracket; 54. Clearing piston; 6. Pressure equalizing pipeline; 7. Second material seal screw conveyor; 8. Flexible hose; 9. Cylinder. DETAILED DESCRIPTION

[0021] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or equipment.

[0023] The following is combined with Figure 1-2 The utility model is described in further detail.

[0024] Reference Figure 1-2 A feeding device for easily hardened materials comprises: a metering silo 1, a transition hopper 2, a feeding silo 3, a first material-sealed screw conveyor 4 and a discharge pipe 5. The metering silo 1, the transition hopper 2, the feeding silo 3, the first material-sealed screw conveyor 4 and the discharge pipe 5 are arranged in sequence from top to bottom and are connected. A ball valve 51 is provided on the discharge pipe 5, a first nitrogen inlet 11 is provided on the metering silo 1, a second nitrogen inlet 52 is provided on the discharge pipe 5, and an exhaust valve is provided on the first material-sealed screw conveyor 4. In this way, when in use, the discharge pipe 5 is closed by the ball valve 51, and the gas passes through the metering silo. 1. The valve at the top closes the inlet of the metering silo 1, and the exhaust valve (not shown in the figure) on the first material sealing screw conveyor 4 is opened. Nitrogen is introduced into the device through the first nitrogen inlet 11 and the second nitrogen inlet 52, and the air in the device is squeezed out to the exhaust valve for discharge, completing the replacement of the air inside the device. Then the material is conveyed into the metering silo 1. Since the circulation space of the entire device is filled with nitrogen, the air content is extremely small, which reduces the reaction between the material and the air and the probability of compaction. The smoothness of the material circulation in the feeding device is improved as much as possible, which is conducive to improving the feeding efficiency.

[0025] like Figure 1 As shown, in order to prevent the inlet and outlet of the transition hopper 2 from being opened or closed, a first butterfly valve 21 is provided at the inlet of the transition hopper 2 and a second butterfly valve 22 is provided at the outlet of the transition hopper 2 .

[0026] like Figure 1As shown, in order to accurately control the feeding weight, a weight loss scale 12 is provided in the metering silo 1. In actual use, the powder silo is located above the metering silo 1, and a discharge rotary valve is installed at the bottom of the powder silo to add material to the feeding weight. The discharge amount is weighed by the weight loss scale 12. When the weight of the material reaches the high material level weight set by the weight loss scale 12, the rotary valve stops, and then the material in the metering silo 1 is discharged into the transition hopper 2. In order to ensure that the material can be discharged into the transition hopper 2 smoothly, the discharge port of the metering silo 1 is provided with a second material sealing spiral conveyor. Conveyor 7, a flexible hose 8 is arranged between the discharge port of the second material-sealed screw conveyor 7 and the feed port of the transition hopper 2, and the material in the metering hopper 1 is transported to the transition hopper 2 through the second material-sealed screw conveyor 7. By shaking the flexible hose 8, it can be ensured that all the materials enter the transition hopper 2, making the quantitative feeding more accurate. In order to avoid the air pressure at the top of the transition hopper 2 from becoming higher (positive pressure) or the air pressure in the metering hopper 1 from becoming lower (negative pressure), which makes it difficult for the material to enter the transition hopper 2, a pressure equalizing pipe 6 is arranged between the top of the transition hopper 2 and the top of the metering hopper 1.

[0027] A further optimization is that a low material level meter 31 is provided in the feeding silo 3 for monitoring the material amount in the feeding silo 3 .

[0028] like Figure 1-2 As shown, in order to avoid residual material in the discharge pipe 5, the discharge port of the first material sealing screw conveyor 4 is arranged on the side of the discharge pipe 5, and a cleaning piston 54 is arranged in the discharge pipe 5. The top of the discharge pipe 5 is provided with a cylinder 9, and the output end of the cylinder 9 is connected to the cleaning piston 54. The specific installation method of the cylinder 9 can be to set a cylinder bracket 53 on the discharge pipe 5, and set the cylinder 9 on the cylinder bracket 53. In this way, during the discharge process of the discharge pipe 5, the cylinder 9 drives the cleaning piston 54 to reciprocate in the discharge pipe 5, and all the material in the discharge pipe 5 is discharged without residue, thereby further improving the accuracy of quantitative feeding. In order to improve the sealing performance, a sealing component, such as a sealing ring, is provided between the cylinder 9 and the discharge pipe 5 during the specific implementation.

[0029] This application can be used for quantitative loading. The following is an example of the specific loading process:

[0030] Nitrogen filling before feeding: Before feeding for the first time, close the manual ball valve on the upper part of the reactor (to prevent the gas in the reactor from rising), open several nitrogen inlet valves to flush in nitrogen, open the exhaust valve on the first material sealing screw conveyor 4 (connected to the environmental protection pipeline), and replace the air inside the equipment after tens of seconds;

[0031] 2. Feeding from weight loss scale: The first butterfly valve 21 is closed, and the rotary valve above the weight loss scale 12 is started to feed. When the material discharge amount reaches the high material level weight set by the weight loss scale 12, the rotary valve stops;

[0032] 3. Unload the material to transition hopper 2: start the pre-production cycle, assuming 2 minutes / cycle and feeding amount 10kg / cycle;

[0033] The second butterfly valve 22 is closed, the first butterfly valve 21 is opened, the third butterfly valve between the second material-sealed screw conveyor 7 and the flexible hose 8 is opened, the second material-sealed screw conveyor 7 discharges the material in the metering hopper 1 into the transition hopper 2, and then the third butterfly valve is closed (at this time, the third butterfly valve controls the feeding accuracy at 5-6g / beat), and the second material-sealed screw conveyor 7 stops at the same time;

[0034] 4. The transition hopper 2 discharges the powder into the feeding silo 3: the second butterfly valve 22 is opened, and the flow-aiding device of the transition hopper 2 (a pneumatic vibrator can be used as an option) is started to ensure that all the powder falls. At this time, the 10kg powder only occupies a part of the feeding silo 3 and has not reached the low material level.

[0035] 5. The above steps are repeated several times until the powder in the feeding silo 3 exceeds the low material level. At this time, the material level reaches the material sealing position (the powder is pressed tightly by its own weight to prevent the upward surge of slightly pressurized gas);

[0036] 6. Open the manual ball valve between the discharge end of the discharge pipe 5 and the upper part of the reactor, start the first material-sealed screw conveyor 4, and feed the material into the reactor. When the material level in the feeding silo 3 drops to the low material level, the first material-sealed screw conveyor 4 stops;

[0037] 7. The pre-production cycle is completed, and the formal continuous production cycle begins: the weight loss scale feeds 10 kg of material to the transition hopper 2, with a design duration of 1 minute and 20 seconds (40 seconds are reserved for the refilling time of the weight loss scale 12 after several cycles. During the refilling period, the second material sealing screw conveyor 7 cannot discharge material to ensure feeding accuracy); the transition hopper 2 unloads the material into the feeding hopper 3, which takes 10 seconds; the material in the feeding hopper 3 is higher than the low material level, and the first material sealing screw conveyor 4 starts to feed the material evenly to the reactor. The material is lower than the low material level, and the first material sealing screw conveyor 4 stops (the material stored in the feeding hopper 3 is basically the same), which takes 1 minute and 45 seconds (15 seconds are reserved for the pipe cleaning mechanism (cylinder 9 drives the cleaning piston 54 to move) to prevent powder from accumulating in the discharge pipe 5); when the time is full for 2 minutes, the next feeding cycle begins.

[0038] In summary, when in use, the discharge pipe 5 is closed through the ball valve 51, the inlet of the metering silo 1 is closed through the valve on the top of the metering silo 1, the exhaust valve on the first material sealing screw conveyor 4 is opened, and nitrogen is introduced into the device through the first nitrogen inlet 11 and the second nitrogen inlet 52, and the air in the device is squeezed out to the exhaust valve for discharge, completing the replacement of the air inside the device, and then the material is transported to the metering silo 1. Since the circulation space of the entire device is filled with nitrogen, the air content is extremely small, which reduces the reaction between the material and the air, resulting in the probability of compaction, and improves the smoothness of the material circulation in the feeding device as much as possible, which is conducive to improving the feeding efficiency.

[0039] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A feeding device for materials prone to hardening, characterized in that: include: A metering silo (1), a transition hopper (2), a feeding silo (3), a first material-sealed screw conveyor (4) and a discharge pipe (5); the metering silo (1), the transition hopper (2), the feeding silo (3), the first material-sealed screw conveyor (4) and the discharge pipe (5) are sequentially arranged and connected from top to bottom; a ball valve (51) is provided on the discharge pipe (5); a first nitrogen inlet (11) is provided on the metering silo (1); a second nitrogen inlet (52) is provided on the discharge pipe (5); and an exhaust valve is provided on the first material-sealed screw conveyor (4).

2. A feeding device for easily hardened materials according to claim 1, characterized in that: The inlet of the transition hopper (2) is provided with a first butterfly valve (21), and the outlet of the transition hopper (2) is provided with a second butterfly valve (22).

3. A feeding device for easily hardened materials according to claim 2, characterized in that: A weight loss scale (12) is provided in the metering silo (1).

4. A feeding device for easily hardened materials according to claim 3, characterized in that: A low material level meter (31) is provided in the feeding bin (3).

5. The feeding device for easily hardened materials according to claim 1, characterized in that: A pressure equalizing pipe (6) is provided between the top of the transition hopper (2) and the top of the metering silo (1).

6. The feeding device for easily hardened materials according to claim 1, characterized in that: The discharge port of the metering silo (1) is provided with a second material-sealed screw conveyor (7), and the second material-sealed screw conveyor (7) is used to convey the material in the metering silo (1) to the transition hopper (2).

7. A feeding device for easily hardened materials according to claim 6, characterized in that: A flexible hose (8) is provided between the discharge port of the second material sealing screw conveyor (7) and the feed port of the transition hopper (2).

8. The feeding device for easily hardened materials according to claim 1, characterized in that: The discharge port of the first material sealing screw conveyor (4) is arranged on the side of the discharge pipe (5), a clearing piston (54) is arranged in the discharge pipe (5), and a cylinder (9) is arranged at the top end of the discharge pipe (5), and the output end of the cylinder (9) is connected to the clearing piston (54).

9. A feeding device for easily hardened materials according to claim 8, characterized in that: A cylinder bracket (53) is provided on the discharge pipe (5), and the cylinder (9) is provided on the cylinder bracket (53).

10. The feeding device for easily hardened materials according to claim 8, characterized in that: A sealing component is provided between the cylinder (9) and the discharge pipe (5).

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