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CN-122016023-A - Semi-automatic equipment and weighing method for high-precision weighing of powder and liquid

CN122016023ACN 122016023 ACN122016023 ACN 122016023ACN-122016023-A

Abstract

The invention discloses semi-automatic equipment and a weighing method for high-precision weighing of powder and liquid, wherein the equipment comprises a solid feeding component (1), a liquid feeding component (2), a weighing component (3), a control system and a PLC (programmable logic controller), wherein the solid feeding component (1), the liquid feeding component (2), the weighing component (3) and the control system are respectively connected with the PLC, the solid feeding component (1) and the liquid feeding component (2) are respectively used for conveying solid materials and liquid materials into a material container (10) on the weighing component (3), and the weighing component (3) is used for weighing the weight of the materials. According to the invention, the liquid feeding system, the solid feeding system and the weighing system are organically combined, and the technical means of intelligent temperature monitoring, intelligent electrostatic monitoring and advanced control system are adopted, so that the unmanned weighing process is realized, and the safety and automation of the material weighing process in the chemical industry are comprehensively improved.

Inventors

  • JIANG NAN
  • LU QINGHUI

Assignees

  • 江苏智仁景行新材料研究院有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. The semi-automatic equipment for high-precision weighing of powder and liquid is characterized by comprising a solid feeding component (1), a liquid feeding component (2), a scale component (3), a control system and a PLC, wherein the solid feeding component (1), the liquid feeding component (2), the scale component (3) and the control system are respectively connected with the PLC; The solid feeding component (1) and the liquid feeding component (2) are respectively used for conveying solid materials and liquid materials into a material container (10) on the weighing component (3), and the weighing component (3) is used for weighing the materials.
  2. 2. Semi-automatic device for high precision weighing of powders and liquids according to claim 1, characterized in that said solid feeding assembly (1) comprises an electromagnetic vibratory feeder (101), a feeding hopper (102), a solid feeding stand (103), an electrostatic detection bar (105), an electrostatic monitoring sensor (108); The electromagnetic vibration feeder (101) and the feeding hopper (102) are fixed on the solid feeding platform (103), the static detection rod (105) is arranged in the middle of a hopper cover of the feeding hopper (102) and is inserted into powder in the feeding hopper (102), and the static monitoring sensor (108) is fixed on the back surface of the solid feeding platform (103).
  3. 3. The semiautomatic apparatus for high-precision weighing of powders and liquids according to claim 2, characterized in that said solid feeding assembly (1) further comprises a solid feeding table base (104), a staple bolt (106), a nylon guide block (107), a ground wire (109) and four stainless steel foot cups (110); The solid feeding platform base (104) is located solid feeding platform (103) bottom, four stainless steel foot cups (110) are located respectively four angles in the bottom of solid feeding platform base (104), static electricity detection stick (105) are located through staple bolt (106) locking limit hopper cover of feed hopper (102), static electricity detection stick (105) with be provided with between the hopper cover of feed hopper (102) nylon guide block (107) so that static electricity in feed hopper (102) powder can be led into in static electricity monitoring sensor (108), the corner of solid feeding platform (103) is provided with earth connection (109).
  4. 4. A semiautomatic apparatus for high-precision weighing of powder and liquid according to claim 2 or 3, characterized in that the liquid feeding assembly (2) comprises a peristaltic pump (203), a liquid feeding table (204), an incoming container (205) and a silicone tube (206), the peristaltic pump (203) and the incoming container (205) are positioned on the liquid feeding table (204), the liquid material is contained in the incoming container (205), the incoming container (205) is connected with the peristaltic pump (203) through a conveying tube, and the peristaltic pump (203) is connected with the liquid container (210) on the weighing system through the silicone tube (206).
  5. 5. The semiautomatic apparatus for high-precision weighing of powder and liquid according to claim 4, wherein the liquid feeding assembly (2) further comprises a liquid feeding table base (201), an adjustable bracket (207), a test tube holder (208), a temperature sensor (211), a temperature-sensitive transition block (212), and a mounting plate (213), the liquid feeding table base (201) is located at the bottom of the liquid feeding table (204), the mounting plate (213) is fixed on the side surface of the liquid feeding table (204), the temperature-sensitive transition block (212) is mounted on the back surface of the peristaltic pump (203), the temperature sensor (211) is fixed on the mounting plate (213), a probe of the temperature sensor (211) is fixedly connected with the temperature-sensitive transition block (212), the test tube holder (208) is mounted on the adjustable bracket (207), and the tail end of the silica tube (206) is clamped on the test tube holder (208).
  6. 6. The semiautomatic apparatus for high-precision weighing of powders and liquids according to claim 5, characterized in that said weighing assembly (3) comprises an electronic balance (215), a weighing tray (209) and an electronic ceiling (217), said electronic balance (215) being located on the electronic ceiling (217), said weighing tray (209) being located on the electronic balance (215), said weighing tray (209) being for placing the material container (10), said adjustable support (207) being located on the electronic ceiling (217).
  7. 7. The semiautomatic equipment for high-precision weighing of powder and liquid according to claim 6, wherein the weighing assembly (3) further comprises four weighing limiting blocks (214), a tray error-proofing plate (216) and an electronic platform base (202), wherein the electronic platform base (202) is positioned at the bottom of an electronic platform (217), the four weighing limiting blocks (214) are positioned on the electronic platform (217) and are arranged at the bottoms of four corners of the electronic balance (215), and the tray error-proofing plate (216) is positioned at one side of the electronic balance (215) and is connected with the electronic platform (217).
  8. 8. The semiautomatic equipment for high-precision weighing of powder and liquid according to claim 7, characterized in that the equipment further comprises an explosion-proof touch screen (6) and a scale display instrument (9), wherein the explosion-proof touch screen (6) and the scale display instrument (9) are arranged on an electronic platform (217), the explosion-proof touch screen (6) is used for displaying the running state of the equipment or alarming, and the scale display instrument (9) is used for displaying the reading of the electronic balance (215).
  9. 9. The semiautomatic equipment for high-precision weighing of powder and liquid according to claim 8, wherein the top of the explosion-proof touch screen (6) is provided with a tri-color lamp (61), the middle is provided with an explosion-proof touch screen (62), and a physical button (63) is arranged below the explosion-proof touch screen (62).
  10. 10. The method for weighing semi-automatic equipment for high-precision weighing of powder and liquid according to any one of claims 4 to 9, wherein the weighing comprises powder weighing and liquid weighing, and when the powder is weighed, the powder feeding of the electromagnetic vibration feeder (101) is divided into a quick stage and a slow stage, wherein the amplitude of the quick feeding stage is 0.7 mm-1.2 mm before the powder feeding reaches 90-5 g of a target nominal value after a weighing program is started, the amplitude of the quick feeding stage is 0.1 mm-0.3 mm after the quick feeding stage, and the powder feeding is regulated to be 0.05 g-2.00 g, and when the powder feeding is stopped immediately after the powder feeding is stopped, the powder floating in the air falls into a material container (10) from the target nominal value; When the liquid is weighed, the liquid feeding of the peristaltic pump (203) is divided into three stages of a quick stage, a medium speed stage and a slow stage, wherein the quick feeding stage comprises a quick feeding stage, a quick feeding stage and a quick feeding stage, the rotating speed is 100-250 rpm after a weighing program is started, the quick feeding stage comprises a step before the quick feeding stage reaches 90-5 g of a target nominal value, a step 2 comprises a step 2 of adjusting the rotating speed to the medium speed feeding after the quick feeding stage is finished and before the quick feeding stage reaches 98-2 g of the target nominal value, the rotating speed is 5-10 rpm, a step 3 comprises a step 3 of adjusting the rotating speed to the slow feeding stage, the rotating speed is 0.1-1 rpm, and a step 4 comprises a step 4 of immediately adjusting the pump head to rotate when the target nominal value is reached, the rotating speed is 0.1-1 rpm, and the pump head stops rotating after the liquid is sucked back for 1-5 s, so that liquid dripping is avoided.

Description

Semi-automatic equipment and weighing method for high-precision weighing of powder and liquid Technical Field The invention belongs to the technical field of fine chemical production equipment, and particularly relates to semi-automatic equipment and a weighing method for high-precision weighing of powder and liquid. Background In the field of energy-containing chemical production, the production process generally needs to mix different materials according to a certain proportion and then carry out the next processing. In order to ensure that the actual application effect and the design theory of the product are as close as possible, the proportion of the materials is very accurate, the materials for production are required to be weighed by a weighing procedure, and the weighed weight is required to be as close as possible to the weight of the process design. Materials often relate to energetic powders and energetic liquids, which have high electrostatic sensitivity and mechanical sensitivity due to their own characteristics, and can explode when impact, extrusion and electrostatic strength are sufficient. In the actual production process, materials are added into a container of an electronic balance in a manual operation mode. The liquid uses tools such as droppers, and the powder uses tools such as medicine spoons. When the materials are excessively fed, the materials are manually taken out from the container until the readings of the electronic balance are consistent with the target values. The production mode has a plurality of defects, such as: (1) And the risk of explosive explosion. The manual operation is a process of directly contacting materials, and the unavoidable repeated feeding and material reduction in the weighing process can cause explosive explosion due to equipment static electricity, human static electricity and improper operation; (2) And risk of deviation of weighing accuracy. In the actual production process, whether the weighing weight is qualified or not is completely judged by manpower. Operators may have errors in manual reading of the indication of the electronic balance due to factors such as fatigue, so that the actual weight of materials in the electronic balance and the target weight deviate uncontrollably, and the follow-up production and the use after the production are affected. (3) And (5) risk of material mixing. Because of the complex formulation of the explosives and powders, various materials participate in the explosive. The actual production is completely dependent on manual judgment whether the current material type is matched with the target. When operators operate wrongly, and throw non-corresponding materials into a container of the electronic balance, the phenomena of early warning and error information are not prevented. (4) Occupational disease risk. Since the liquid material is partly volatile and toxic, such as tris (2-methylaziridine) phosphine oxide, the powder material may also be at risk of dust inhalation contamination, due to the production of the desired material. During weighing, the process of repeatedly adding and subtracting materials clearly increases the damage to the health of operators. Disclosure of Invention The invention aims to provide semi-automatic equipment and a weighing method for high-precision weighing of powder and liquid so as to solve the defects of the traditional manual weighing equipment in the aspects of safety, weighing precision, stability and the like. The technical scheme adopted by the invention is as follows: the semi-automatic equipment for high-precision weighing of powder and liquid comprises a solid feeding component, a liquid feeding component, a scale component, a control system and a PLC, wherein the solid feeding component, the liquid feeding component, the scale component and the control system are respectively connected with the PLC; The solid feeding component and the liquid feeding component are respectively used for conveying solid materials and liquid materials into a material container on the weighing component, and the weighing component is used for weighing out the materials. Further, the solid feeding component comprises an electromagnetic vibration feeder, a feeding hopper, a solid feeding platform, an electrostatic detection rod and an electrostatic monitoring sensor; The electromagnetic vibration feeder and the feeding hopper are fixed on the solid feeding platform, the static detection rod is arranged in the middle of a hopper cover of the feeding hopper and is inserted into powder in the feeding hopper, and the static detection sensor is fixed on the back of the solid feeding platform. Further, the solid feeding assembly further comprises a solid feeding platform base, a hoop, a nylon guide block, a grounding wire and four stainless steel foot cups; the solid feeding platform base is located solid feeding platform bottom, four stainless steel foot cups are located respectively four angles in the