Superfine powder vibration discharging device and discharging efficiency and precision control method

Abstract

The invention provides an ultrafine powder vibration discharging device and a discharging efficiency and precision control method, and is suitable for the field of ultrafine powder charging in ammunition warhead charging and engine charging. The device comprises a superfine powder container, a discharging support, a vibration feeding mechanism and a weighing module. A conical discharging valve body is installed in the superfine powder container, the vibration feeding mechanism comprises a vibration feeding pipeline and an anti-explosion vibrator, an angle adjusting opening is formed in the vibration feeding pipeline, and the anti-explosion vibrator is connected with the weighing module through damping supporting legs. The method for controlling the discharging efficiency and precision comprises the steps that weighing is started after butt joint of the weighing modules is completed and stable; when single-time weighing reaches a set critical value, the amplitude of the vibration feeding machine is remotely adjusted for accurate feeding; and natural vibration frequency is filtered. By optimizing the angle adjusting range (0-3 degrees) of the vibration feeding pipeline and the fixing mode of the weighing module, efficient and accurate discharging is achieved, and meanwhile the safety and the automation level of the production process are improved.

Description

Technical Field

[0001] The invention relates to the field of ultrafine powder feeding in weapon and ammunition warhead charges and engine charges, including automatic feeding control of ultrafine explosives, ultrafine ammonium perchlorate and other powders, and specifically to an ultrafine powder vibration feeding device and a feeding efficiency and precision control method. Background Art

[0002] In the field of automatic feeding of ultrafine powders in the preparation of PBX casting explosives in warhead charges and composite solid propellants in engine charges, ultrafine explosives, ultrafine ammonium perchlorate and other powders, such as 120 mesh octochrome, 5 types of hexachlorobenzene, ultrafine ammonium perchlorate and other powder materials are increasingly used. The main function of ultrafine explosives is to carry out particle grading with coarse-grained explosives, thereby reducing the viscosity of high-solid content mixed explosive slurry, ensuring the fluidity of the slurry, and meeting the needs of casting charging process. The impact sensitivity of octochrome in PBX casting explosives is 100%, the friction sensitivity is 100%, and the impact sensitivity of hexachlorobenzene is 80±8%, and the friction sensitivity is 76±8%. The sensitivity is relatively high, and the safety risk of the production process is high. Due to the high sensitivity and poor dispersion of explosives in the process of ultrafine explosive feeding, the explosive particles are easy to adhere and agglomerate in the hopper and pipeline, and it is difficult to realize automatic transportation of explosives. In particular, static electricity and dust are easily generated during the transportation of explosives, which brings safety risks. At present, in most cases, dangerous operations such as loading, transporting and adding explosives still need to be performed directly by humans. Therefore, it is urgent to break through the automatic loading process technology of ultra-fine explosives, realize unmanned production process on site, master the technology of automated production process equipment, and improve the inherent safety of the production site. Powder vibration feeding technology has the characteristics of smooth transportation, low noise, and multiple transportation. In view of the poor docking sealing and the inability to control the feeding accuracy and efficiency in the vibration feeding process, one of the technical focuses to solve the above-mentioned problems is to improve the feeding efficiency and control the single feeding accuracy from the structural aspect. Summary of the invention

[0003] The present invention provides an ultrafine powder vibration feeding device and a feeding efficiency and precision control method to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A superfine powder vibrating feeding device comprises an superfine powder container, a feeding bracket, a vibrating feeding mechanism and a weighing module; a conical feeding valve body is installed inside the superfine powder container, the vibrating feeding mechanism comprises a vibrating feeding pipe and an explosion-proof vibrator, an angle adjustment port is provided on the vibrating feeding pipe, and the explosion-proof vibrator is connected to the weighing module through a shock-absorbing leg.

[0005] Furthermore, a feeding channel is provided between the ultrafine powder container and the vibrating feeding pipe of the vibrating feeding mechanism.

[0006] The angle adjustment port can adjust the angle of the vibrating feeding pipe in a range of 0-3°.

[0007] The weighing module is fixed by using a rocker column, an adjusting nut and a high-precision support.

[0008] A method for controlling the feeding efficiency and precision of an ultrafine powder vibrating feeding device comprises the following steps: (1) The ultrafine powder container is docked with the unloading bracket, and the weighing module at the bottom of the unloading bracket starts to record the current powder weight; (2) The weighing module records the amount of material discharged at a time. When the set critical value is reached, the amplitude of the vibration feeding mechanism is remotely adjusted for accurate feeding. (3) Filter the natural vibration frequency between the weighing module and the vibration feeding mechanism; (4) Remotely record the single unloading time and convert it into the unloading speed based on the single unloading amount. The unit is set to kg / min.

[0009] The ultrafine powder container and the unloading bracket are connected in a conical guide positioning process, and the weighing module stably measures the current ultrafine powder weight, and performs weightless weighing according to a single unloading of 40-80kg.

[0010] The weighing module records the single feeding amount and sets the weightless feeding critical value to within 2kg. After reaching the set critical value, the amplitude of the vibration feeder is remotely adjusted to control the feeding speed for precise feeding. After control, the single weighing accuracy is met at 3‰.

[0011] The weighing module can detect the fixed waveform and determine it as normal, and then filter the natural frequency of the vibrating feeder, so as to ensure that the vibration generated during the working process of the vibrating feeder will not affect the weighing module measurement, and assist in controlling the feeding accuracy.

[0012] During the unloading process, the single unloading time is recorded remotely and converted into the unloading speed in combination with the single unloading amount. The unit is set to kg / min and the unloading efficiency of ultrafine powder is controlled to 40-60kg / min.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the conical discharge valve body of the ultrafine powder container is connected to the discharge bracket, and the discharge bracket is installed on the weighing module; the weighing module opens the conical discharge valve body after the reading is stable, and the vibrating feeder stably conveys the ultrafine powder; the weighing module measures the discharge amount of the ultrafine powder, and remotely controls the amplitude of the vibrating feeder to achieve precise weight control. The ultrafine powder vibration discharge efficiency and accuracy control method provided by the present invention can meet the requirements of uniform delivery of ultrafine powders such as ultrafine explosives and ultrafine ammonium perchlorate, and a single discharge accuracy of 3‰, and the overall effect is significant, which has good application value in the field of ultrafine ultrafine powder vibration discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an ultrafine powder vibration feeding device according to the present invention; Figure 2 This is a schematic diagram of the connection between the conical discharge valve body and the discharge bracket of the present invention; Figure 3 This is a schematic diagram of the vibration feeding mechanism of the present invention; Figure 4 for Figure 3 A top view of Figure 5 This is a schematic diagram of the floating design of the weighing module of the present invention; Figure 6 It is a structural schematic diagram of the adjusting nut of the present invention; Figure 7 It is a structural schematic diagram of the rocking column of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is described in detail below in conjunction with specific embodiments.

[0016] Reference Figure 1-7 As shown, a superfine powder vibrating feeding device comprises a superfine powder container 1, a feeding support 2, a vibrating feeding mechanism 3 and a weighing module 4. Figure 2 As shown, a conical discharge valve body 5 is installed inside the ultrafine powder container. Figure 3 As shown, the vibration feeding mechanism includes a vibration feeding pipe 8 and an explosion-proof vibrator 10. An angle adjustment port 9 is provided on the vibration feeding pipe. The explosion-proof vibrator is connected to the weighing module through a shock-absorbing leg 11. The conical discharge valve body is docked with the discharge bracket, and the docking accuracy meets ±0.5mm. After docking, the discharge valve body is directly connected to the discharge bracket. The discharge bracket is installed on the weighing module, and the base of the weighing module adopts a floating design to prevent eccentric load measurement and filter the natural vibration frequency.

[0017] A feeding channel 7 is provided between the ultrafine powder container and the vibrating feeding pipe of the vibrating feeding mechanism. After the weighing module has a stable reading, the conical feeding valve body is opened, and the powder enters the vibrating feeding mechanism through the feeding channel. The vibrating feeding mechanism stably transports the ultrafine powder, and the weighing module records the weight loss. After reaching the weighing critical value, the vibration feeding amplitude is adjusted by remote control, thereby controlling the feeding accuracy.

[0018] The angle adjustment range of the vibration feeding pipe is 0-3°. The shock-absorbing legs and the weighing module are connected with rubber so that the vibration frequency has no effect on the symmetrical display.

[0019] The weighing module is fixed by a rocker column 14 , an adjusting nut 13 , and a high-precision support 12 .

[0020] A method for controlling the feeding efficiency and precision of an ultrafine powder vibrating feeding device comprises the following steps: (1) The ultrafine powder container is docked with the unloading bracket, and the weighing module at the bottom of the unloading bracket starts to record the current powder weight; (2) The weighing module records the amount of material discharged at a time. When the set critical value is reached, the amplitude of the vibration feeding mechanism is remotely adjusted for accurate feeding. (3) Filter the natural vibration frequency between the weighing module and the vibration feeding mechanism; (4) Remotely record the single unloading time and convert it into the unloading speed based on the single unloading amount. The unit is set to kg / min.

[0021] The ultrafine powder container and the unloading bracket are connected in a conical guide positioning process, and the weighing module stably measures the current ultrafine powder weight, and performs weightless weighing according to a single unloading of 40-80kg.

[0022] The weighing module records the single feeding amount and sets the weightless feeding critical value to within 2kg. After reaching the set critical value, the amplitude of the vibration feeder is remotely adjusted to control the feeding speed for precise feeding. After control, the single weighing accuracy is met at 3‰.

[0023] The weighing module can detect the fixed waveform and determine it as normal, and then filter the natural frequency of the vibrating feeder, so as to ensure that the vibration generated during the working process of the vibrating feeder will not affect the weighing module measurement, and assist in controlling the feeding accuracy.

[0024] During the unloading process, the single unloading time is recorded remotely and converted into the unloading speed in combination with the single unloading amount. The unit is set to kg / min and the unloading efficiency of ultrafine powder is controlled to 40-60kg / min.

[0025] In one embodiment, a conical discharge valve body 5 is installed inside the ultrafine powder container 1, and the conical discharge valve body has an inclination angle of 50°, which reduces the contact area with the ultrafine powder, improves the smoothness of ultrafine powder discharge, and has high sealing performance. Figure 2 As shown, after the conical discharge valve body is opened, a discharge space 6 is formed between the conical discharge valve body and the ultrafine powder container 1, and the discharge transition angle is 35° to prevent the ultrafine powder from impacting the weighing module. After the discharge channel 7 is connected, the ultrafine powder enters the vibrating feeding mechanism 3 under the action of gravity, and the ultrafine powder enters the final discharge container through the vibrating feeding pipe 8. The process can be adjusted by adjusting the angle of the vibrating feeding pipe through the angle adjustment port 9, with a maximum adjustment angle of 3°. This control method can effectively improve the discharge efficiency, and the discharge process has a buffer angle to prevent the discharge speed from exceeding the limit. The current ultrafine powder discharge efficiency can be adjusted in the range of 40 to 60 kg / min.

[0026] Reference Figure 1-4 Before unloading the ultrafine powder, first install the weighing module 4, whose four legs are fixed by rocking columns, adjusting nuts, and high-precision supports; after the fixation is completed, the ultrafine powder container 1 is docked with the unloading bracket 2 by three-point positioning and four-point support, and the weighing module 4 displays the current weight; after the ultrafine powder is unloaded, the vibration feeding mechanism 3 turns on the explosion-proof vibrator 10 to transport the ultrafine powder, and the mechanism amplitude generated during transportation is filtered by the shock-absorbing legs 11; to ensure the unloading efficiency, if the amplitude is too large, the rocking column mechanism at the bottom of the weighing module 4 performs secondary vibration filtering to further improve the weighing accuracy. The weighing critical value can be set at the control end. When the weighing module reaches this value, the vibrator 10 immediately adjusts the output voltage to perform refined unloading control. This control method can meet the requirements of uniform ultrafine powder transportation and single unloading accuracy of 3‰.

[0027] The control method for the feeding efficiency of ultrafine powders is as follows: After the ultrafine powder container is docked and positioned with the feeding bracket, the single feeding amount and the vibration frequency of the vibrating feeding mechanism are set in the program interface. After the single feeding amount is set, the weighing module at the bottom of the feeding bracket stably measures the current powder weight, and the weight loss weighing is performed according to the single feeding of 40-80kg. Taking a single 40kg as an example, when the weighing shows that the ultrafine powder has lost weight of 40kg, the vibrating feeding mechanism stops immediately, the powder stops feeding, and the control program records the feeding time and stores it. After the instruction to continue feeding is issued, the feeding mechanism vibrates. If the remaining powder is less than 40kg, and the weighing module shows that the current weight has not changed for more than 10s, it is determined that the feeding is completed, and the empty container is transferred. This control method meets the conveying efficiency of 40-60kg / min.

[0028] The method for controlling the precision of ultrafine powder feeding is as follows: after the ultrafine powder container is docked and positioned with the feeding bracket, the control program sets the vibration frequency of the vibration feeding mechanism and the weight loss feeding critical value. The vibration frequency is mainly enhanced or attenuated by changing the output voltage value. Taking a single 40kg as an example, the control program sets the initial vibration frequency to 100Hz, the precise vibration frequency to 40Hz, and the weight loss feeding critical value to 1kg. The vibration feeding mechanism starts vibrating and feeding. When the weight loss value of the weighing module reaches 39kg, the vibration frequency automatically drops to 40Hz. At this time, the ultrafine powder is accurately conveyed until the displayed weight loss reaches 40kg. The vibration feeding mechanism stops, and the actual value of the single feeding weighing is remotely recorded to achieve refined control of feeding. This control method can meet the requirements of uniform conveying of a certain type of ultrafine powder and a single feeding precision of 3‰.

[0029] The present invention proposes a method for controlling the efficiency and precision of ultrafine powder vibration feeding, which, after debugging and actual use, can achieve the feeding efficiency and precision requirements of ultrafine explosives, ultrafine ammonium perchlorate and other powders, has a significant overall effect, and has good application value in the field of ultrafine powder vibration feeding.

Claims

1. A superfine powder vibrating feeding device, characterized in that: It includes an ultrafine powder container, a feeding bracket, a vibrating feeding mechanism and a weighing module; a conical feeding valve body is installed inside the ultrafine powder container, the vibrating feeding mechanism includes a vibrating feeding pipeline and an explosion-proof vibrator, an angle adjustment port is provided on the vibrating feeding pipeline, and the explosion-proof vibrator is connected to the weighing module through a shock-absorbing leg.

2. The ultrafine powder vibrating feeding device according to claim 1, characterized in that: A feeding channel is provided between the ultrafine powder container and the vibrating feeding pipe of the vibrating feeding mechanism.

3. The ultrafine powder vibration feeding device according to claim 1, characterized in that: The angle adjustment port can adjust the angle of the vibrating feeding pipe in a range of 0-3°.

4. The ultrafine powder vibrating feeding device according to claim 1, characterized in that: The weighing module is fixed by using a rocker column, an adjusting nut and a high-precision support.

5. A method for controlling the feeding efficiency and precision of an ultrafine powder vibration feeding device, characterized in that: The following steps are involved: (1) The ultrafine powder container is docked with the unloading bracket, and the weighing module at the bottom of the unloading bracket starts to record the current powder weight; (2) The weighing module records the amount of material discharged at a time. When the set critical value is reached, the amplitude of the vibration feeding mechanism is remotely adjusted for accurate feeding. (3) Filter the natural vibration frequency between the weighing module and the vibration feeding mechanism; (4) Remotely record the single unloading time and convert it into the unloading speed based on the single unloading amount. The unit is set to kg / min.

6. A method for controlling the feeding efficiency and precision of an ultrafine powder vibration feeding device according to claim 5, characterized in that: The ultrafine powder container and the unloading bracket are connected in a conical guide positioning process, and the weighing module stably measures the current ultrafine powder weight, and performs weightless weighing according to a single unloading of 40-80kg.

7. A method for controlling the feeding efficiency and precision of an ultrafine powder vibration feeding device according to claim 6, characterized in that: The weighing module records the single feeding amount and sets the weightless feeding critical value to within 2kg. After reaching the set critical value, the amplitude of the vibration feeder is remotely adjusted to control the feeding speed for precise feeding. After control, the single weighing accuracy is met at 3‰.

8. The method for controlling the feeding efficiency and precision of an ultrafine powder vibrating feeding device according to claim 6, characterized in that: The weighing module can detect the fixed waveform and determine it as normal, and then filter the natural frequency of the vibrating feeder, so as to ensure that the vibration generated during the working process of the vibrating feeder will not affect the weighing module measurement, and assist in controlling the feeding accuracy.

9. The method for controlling the feeding efficiency and precision of an ultrafine powder vibration feeding device according to claim 6, characterized in that: During the unloading process, the single unloading time is recorded remotely and converted into the unloading speed in combination with the single unloading amount. The unit is set to kg / min and the unloading efficiency of ultrafine powder is controlled to 40-60kg / min.

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