Vacuum blanking device

Abstract

The utility model discloses a vacuum blanking device, which belongs to the technical field of metallurgical equipment and comprises a first-stage blanking component, a second-stage blanking component and a first-stage and third-stage blanking component. The first-stage discharging assembly comprises a storage hopper and a first electromagnetic vibration feeder. The second-stage discharging assembly comprises a weighing hopper and a second electromagnetic vibration feeder. The third-stage discharging assembly comprises a material storage elephant trunk, a first pneumatic vacuum gate valve, a second pneumatic vacuum gate valve and a vacuum pneumatic conical gate valve. A two-stage electromagnetic vibration feeder is adopted to control feeding, quick response to start and stop can be achieved, and precise control over stopping and precise feeding are achieved. A two-stage pneumatic vacuum gate valve is adopted to control blanking, and sealing is built-in, so that the production accident that sealing is damaged due to blanking and vacuumizing cannot be carried out finally is effectively avoided. The pneumatic vacuum gate valve and the electromagnetic vibration feeder are both arranged on the outer side, and daily point inspection and maintenance can be conveniently and directly carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, in particular to a vacuum blanking device. Background Art

[0002] The vacuum alloy feeding system of the RH furnace is a complex system that integrates functions such as material handling, quantitative distribution and automatic control. It is designed to achieve efficient, safe and accurate supply of molten steel and alloy materials to meet the strict requirements of the RH furnace refining process.

[0003] Existing RH furnace vacuum feeding systems usually have the following three types: the first type consists of an upper hopper, a lower hopper, a vacuum pneumatic cone valve, an electric vibrating feeder, a weighing unit, etc., and feeding is carried out by the vibration of the electric vibrating feeder; the second type consists of an upper hopper, a lower hopper, a vacuum pneumatic cone valve, a weighing unit, a re-pressure control system, etc., and feeding is carried out by the cooperation of the upper vacuum pneumatic cone valve and the lower vacuum cone valve; the third type consists of an upper hopper, a lower hopper, a rotary feeder, a pressure equalizing pipe, a weighing unit, etc., and feeding is carried out by the rotation of the rotary feeder.

[0004] The first method involved a vacuum pneumatic conical gate valve that could become stuck after loading, leading to leaks and production accidents such as inability to vacuum. Other issues included inaccurate and inaccurate material discharge under vacuum conditions. Furthermore, a significant discrepancy between the set and actual material weights was observed. The vibrating feeder also experienced material leakage during discharge. Because the weighing unit, vacuum pneumatic conical gate valve, and vibrating feeder—all key components enclosed within the system—troubleshooting was difficult and inconvenient for routine inspection and maintenance.

[0005] The second type of vacuum feeding system switches the vacuum and negative pressure systems back and forth multiple times. It has two upper and lower vacuum pneumatic conical plug-in valves with a relatively complex structure and an extremely large size. Feeding is only done by switching the conical valve once, resulting in poor feeding accuracy and greater difficulty in control. The seal of the lower vacuum pneumatic conical valve is easily affected by material erosion and friction, resulting in poor sealing.

[0006] The third type of feeding system uses a high-precision rotary feeder with encoder counting to perform multiple vacuum feedings. Compared with the first and second feeding methods, the feeding amount is well controllable, the structure is relatively compact, and the rotary feeder is easy to maintain. However, there is also the problem that after long-term and frequent feeding, the fluororubber seal is prone to wear, fall off, deformation or displacement, resulting in a decrease in the sealing performance of the conical valve and leading to air leakage and failure to vacuum. Utility Model Content

[0007] The purpose of the utility model is to provide a vacuum blanking device to solve the problems raised in the above-mentioned prior art.

[0008] A vacuum blanking device is provided, comprising:

[0009] A first-stage unloading assembly, comprising a storage hopper and a first electromagnetic vibrating feeder;

[0010] A secondary unloading assembly, comprising a weighing hopper and a second electromagnetic vibrating feeder, wherein the weighing hopper receives the material output by the first electromagnetic vibrating feeder;

[0011] The three-stage unloading assembly includes a material storage chute, a first pneumatic vacuum plug-in valve, a second pneumatic vacuum plug-in valve, and a vacuum pneumatic conical plug-in valve. The material storage chute receives the material output by the second electromagnetic vibrating feeder. The first pneumatic vacuum plug-in valve and the second pneumatic vacuum plug-in valve are respectively arranged in the middle of the path of the material storage chute. The vacuum pneumatic conical plug-in valve is connected to the output end of the material storage chute.

[0012] Furthermore, the first electromagnetic vibrating feeder is connected to the storage hopper via a first flexible connection flange. The first flexible connection flange provides a flexible connection while enabling material conveyance, preventing vibration energy from being transferred to the storage hopper when the first electromagnetic vibrating feeder vibrates, and improving the sealing effect between the storage hopper and the first electromagnetic vibrating feeder.

[0013] Furthermore, the first electromagnetic vibrating feeder is suspended below the storage hopper by a plurality of soft ropes, and the first electromagnetic vibrating feeder is fixed by the suspension of the soft ropes without interfering with the vibration of the first electromagnetic vibrating feeder.

[0014] Furthermore, a first weighing unit is provided between the storage hopper and the fixed frame. The storage hopper performs a first weighing on the material, and the weighing hopper performs a second weighing on the material. The weighing units on the weighing hopper and the storage hopper will each perform a weighing and comparison, thereby avoiding large deviations in material discharge due to inaccurate weighing units.

[0015] Furthermore, the second electromagnetic vibrating feeder and the weighing hopper are connected via a second flexible connection flange. The second flexible connection flange provides a flexible connection while enabling material conveyance, preventing vibration energy from being transferred to the weighing hopper when the second electromagnetic vibrating feeder vibrates, and improving the sealing effect between the weighing hopper and the second electromagnetic vibrating feeder.

[0016] Furthermore, the second electromagnetic vibrating feeder is suspended below the weighing hopper by a plurality of soft ropes, and the second electromagnetic vibrating feeder is fixed by the suspension of the soft ropes without interfering with the vibration of the second electromagnetic vibrating feeder.

[0017] Furthermore, the material storage chute between the first and second pneumatic vacuum gate valves is tilted at an angle of 45° to 70°. The central portion of the material storage chute is tilted, forming an angle of 45° to 70° with the horizontal plane, effectively reducing the force exerted by the material on the second pneumatic vacuum gate valve and protecting the gate of the second pneumatic vacuum gate valve.

[0018] Furthermore, the first pneumatic vacuum gate valve is located outside the storage chute and is connected to the storage chute via a flange. The first pneumatic vacuum gate valve is arranged outside the storage chute, which facilitates inspection and maintenance of the first pneumatic vacuum gate valve.

[0019] Furthermore, the second pneumatic vacuum gate valve is located outside the storage chute and is connected to the storage chute via a flange. The second pneumatic vacuum gate valve is arranged outside the storage chute, which facilitates inspection and maintenance of the second pneumatic vacuum gate valve.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] A two-stage electromagnetic vibrating feeder controls feeding, enabling rapid start and stop response, precise control of stopping, and accurate feeding. A two-stage pneumatic vacuum gate valve controls unloading, with built-in seals, effectively preventing seal damage caused by unloading, which could ultimately lead to production accidents such as vacuum failure. Both the pneumatic vacuum gate valve and electromagnetic vibrating feeder are located externally, allowing for direct access for daily inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of a vacuum blanking device;

[0024] Figure 2 This is a structural schematic diagram of the vacuum pneumatic conical plug-in valve provided by the utility model.

[0025] In the figure: 1. First-stage unloading assembly; 11. Storage hopper; 12. First electromagnetic vibrating feeder; 13. First flexible connection flange; 2. Second-stage unloading assembly; 21. Weighing hopper; 22. Second electromagnetic vibrating feeder; 23. Second flexible connection flange; 3. Third-stage unloading assembly; 31. Storage chute; 32. First pneumatic vacuum gate valve; 33. Second pneumatic vacuum gate valve; 34. Vacuum pneumatic conical gate valve; 4. Flexible rope. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0027] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0028] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of substantially identical structures may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Furthermore, the drawings and the following description are provided to facilitate a thorough understanding of this application by those skilled in the art and are not intended to limit the subject matter recited in the claims.

[0029] See also Figure 1-2As shown, in an embodiment of the present invention, a vacuum unloading device includes a first-stage unloading component 1, a second-stage unloading component 2, and a first- and third-stage unloading component 3. The first-stage unloading component 1 includes a storage hopper 11 and a first electromagnetic vibrating feeder 12. The second-stage unloading component 2 includes a weighing hopper 21 and a second electromagnetic vibrating feeder 22. The weighing hopper 21 receives the material output by the first electromagnetic vibrating feeder 12. The third-stage unloading component 3 includes a storage chute 31, a first pneumatic vacuum plug-in valve 32, a second pneumatic vacuum plug-in valve 33, and a vacuum pneumatic conical plug-in valve 34. The storage chute 31 receives the material output by the second electromagnetic vibrating feeder 22. The first pneumatic vacuum plug-in valve 32 and the second pneumatic vacuum plug-in valve 33 are respectively and sequentially arranged in the middle of the path of the storage chute 31. The vacuum pneumatic conical plug-in valve 34 is connected to the output end of the storage chute 31.

[0030] The material enters from the storage hopper 11 and is transported to the weighing hopper 21 under the vibration of the first electromagnetic vibrating feeder 12, which provides driving force to the material to control the material discharge speed and prevent blockage during discharge. The material in the weighing hopper 21 is transported to the storage chute 31 by the vibration of the second electromagnetic vibrating feeder 22. A weighing unit is provided between the storage hopper 11 and the frame of the fixed storage hopper 11, and a weighing unit is provided between the weighing hopper 21 and the frame of the fixed weighing hopper 21. When the storage hopper 11 is prepared in advance and when the first electromagnetic vibrating feeder 12 is adding material to the weighing hopper 21, the weighing units on the weighing hopper 21 and the storage hopper 11 will be weighed and compared respectively to avoid large deviations in material discharge due to inaccurate weighing units. Therefore, a two-stage discharge assembly is provided to improve the accuracy of material discharge.

[0031] The first electromagnetic vibrating feeder 12 and the second electromagnetic vibrating feeder 22 use the periodically changing electromagnetic force generated by the electromagnetic exciter to make the feeding trough vibrate back and forth to feed. Existing electric vibrating feeders control the feeding speed by rotating the motor, driving the eccentric blocks on both sides of the motor to rotate and collide with the conveyor channel to generate vibration. When the motor stops, it is often unable to stop immediately due to inertia, and the feeding accuracy is not high. Even if improvements are made by adding braking resistors, the influence of the motor inertia cannot be completely eliminated. However, as long as the power is cut off and the electromagnetic force disappears, the electromagnetic vibrating feeder can immediately stop vibrating and feeding. It has a fast response speed and can achieve precise feeding control.

[0032] When the second electromagnetic vibrating feeder 22 is feeding material into the storage chute 31, the gate of the first pneumatic vacuum gate valve 32 opens, while the gate of the second pneumatic vacuum gate valve 33 closes. The material is then weighed twice by the first and second unloading assemblies 1 and 2 and conveyed to the second pneumatic vacuum gate valve 33. The first pneumatic vacuum gate valve 32 is then closed, and the second pneumatic vacuum gate valve 33 is opened. The accurately weighed material falls toward the vacuum pneumatic conical gate valve 34, the bottom of which is connected to the vacuum tank. At this point, the first pneumatic vacuum gate valve 32 can pre-receive the material conveyed by the second electromagnetic vibrating feeder 22, achieving continuous material conveying and improving conveying efficiency.

[0033] The first electromagnetic vibrating feeder 12 is connected to the hopper 11 via a first flexible connection flange 13. The first flexible connection flange 13 is a flange connection made of a rubber hose or a metal hose. When the first electromagnetic vibrating feeder 12 vibrates, it provides a shock-absorbing and vibration-damping effect on the hopper 11. The first electromagnetic vibrating feeder 12 is suspended from the bottom of the hopper 11 by a number of flexible cables 4. The flexible cables 4 can be steel ropes, chains, or springs. These cables provide a support platform for the first electromagnetic vibrating feeder 12 while not interfering with its vibration.

[0034] Similarly, the second electromagnetic vibrating feeder 22 is connected to the weighing hopper 21 via a second flexible connection flange 23. The second flexible connection flange 23, a flange connection made of a rubber or metal hose, provides a shock-absorbing and vibration-damping effect on the weighing hopper 21 when the second electromagnetic vibrating feeder 22 vibrates. The second electromagnetic vibrating feeder 22 is suspended below the weighing hopper 21 via a number of flexible cables 4, providing a support platform for the second electromagnetic vibrating feeder 22 while not interfering with its vibration.

[0035] A first pneumatic vacuum gate valve 32 and a second pneumatic vacuum gate valve 33 are installed on the outside of the middle section of the storage chute 31. These pneumatic gate valves utilize a pneumatic source to drive a cylinder, causing the gates to extend and retract. Specifically, a CCQ pneumatic gate valve from Shanghai Jianqiao Valve Manufacturing Co., Ltd. can be used. Both valves are connected to the storage chute 31 via flanges, which are sealed with gaskets.

[0036] See also Figure 2 As shown, the vacuum pneumatic conical plug-in valve 34 is a device in which a telescopic cylinder drives the bottom conical valve to open and close the valve. A sealing strip is provided between the conical valve and the discharge pipe. The discharge control can be achieved by controlling the lifting height of the conical valve.

[0037] Compared to the vacuum pneumatic conical valve 34, the pneumatic vacuum valve has an internal sealing strip, which prevents damage, deformation, and air leakage caused by material erosion. The vacuum pneumatic conical valve 34, the first pneumatic vacuum valve 32, and the second pneumatic vacuum valve 33 are combined for material discharging, effectively preventing vacuum failures caused by damaged or leaking sealing strips. Furthermore, the first and second electromagnetic vibrating feeders 12, 22, first and second pneumatic vacuum valves 32, 33 are all located outside the valve, facilitating routine inspection, repair, and maintenance, making troubleshooting easier.

[0038] The material storage chute 31 located between the first pneumatic vacuum gate valve 32 and the second pneumatic vacuum gate valve 33 is arranged in an inclined shape, and the impact force of the material on the pneumatic vacuum gate valve can be effectively reduced through the buffering of the slope.

[0039] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A vacuum blanking device, characterized in that: include: A first-stage unloading assembly (1), comprising a storage hopper (11) and a first electromagnetic vibrating feeder (12); A secondary unloading assembly (2) includes a weighing hopper (21) and a second electromagnetic vibrating feeder (22), wherein the weighing hopper (21) receives the material output by the first electromagnetic vibrating feeder (12); The three-stage unloading assembly (3) includes a material storage chute (31), a first pneumatic vacuum plug-in valve (32), a second pneumatic vacuum plug-in valve (33) and a vacuum pneumatic conical plug-in valve (34). The material storage chute (31) receives the material output by the second electromagnetic vibrating feeder (22). The first pneumatic vacuum plug-in valve (32) and the second pneumatic vacuum plug-in valve (33) are respectively and sequentially arranged in the middle of the path of the material storage chute (31). The vacuum pneumatic conical plug-in valve (34) is connected to the output end of the material storage chute (31).

2. A vacuum blanking device according to claim 1, characterized in that: The first electromagnetic vibrating feeder (12) is connected to the storage hopper (11) via a first flexible connection flange (13).

3. A vacuum blanking device according to claim 2, characterized in that: The first electromagnetic vibrating feeder (12) is suspended below the storage hopper (11) via a plurality of soft ropes (4).

4. A vacuum blanking device according to claim 1, characterized in that: The second electromagnetic vibrating feeder (22) is connected to the weighing hopper (21) via a second flexible connection flange (23).

5. A vacuum blanking device according to claim 4, characterized in that: The second electromagnetic vibrating feeder (22) is suspended below the weighing bucket (21) via a plurality of soft ropes (4).

6. A vacuum blanking device according to claim 1, characterized in that: The material storage chute (31) located between the first pneumatic vacuum plug-in valve (32) and the second pneumatic vacuum plug-in valve (33) is arranged in an inclined shape, with an inclination angle of 45° to 70°.

7. The vacuum blanking device according to claim 1, characterized in that: The first pneumatic vacuum gate valve (32) is located outside the material storage chute (31) and is connected to the material storage chute (31) via a flange.

8. The vacuum blanking device according to claim 1, characterized in that: The second pneumatic vacuum gate valve (33) is located outside the material storage chute (31) and is connected to the material storage chute (31) via a flange.

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