Current transformer glue filling machine suitable for closed-loop control and automatic feeding

Abstract

The utility model relates to be suitable for closed loop control and automatic feeding's current transformer glue filling machine, including be used for A material stirring's A material stirring jar, be used for B material stirring's B material stirring jar and be used for A material and B material mixing's mixer, A material stirring jar is equipped with be used for connecting A material ton barrel's A material feed pipe, A material feed pipe is equipped with A material feed pump, B material stirring jar is equipped with be used for connecting B material ton barrel's B material feed pipe, B material feed pipe is equipped with B material feed pump, the mixer is equipped with be used for connecting A material stirrer export's A material delivery pipe, be used for connecting B material stirrer export's B material delivery pipe and be used for the discharge outlet of discharging, A material delivery pipe and B material delivery pipe are equipped with A material delivery pump and B material delivery pump respectively, A material stirring jar and B material stirring jar all are equipped with be used for the electronic scale of real -time detection its weight. The utility model can be better applicable to epoxy resin A, B raw material form of ton barrel package, make things convenient for on -the -spot use, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to a current transformer glue dispensing machine suitable for closed-loop control and automatic feeding. Background Technology

[0002] In existing instrument transformers, the iron core and coils are typically cast into the housing using epoxy resin to achieve good fixation, sealing, and insulation. There are two types of raw materials for epoxy resin casting: component A (or A glue) and component B (or B glue), consisting of two parts, A and B. Component A mainly consists of the epoxy resin itself, typically including low molecular weight, high epoxy value epoxy resins such as E-44, E-51, or mixtures thereof. These epoxy resins are mixed with a monomeric solvent containing glycidyl ether as an active diluent, resulting in a colorless, transparent, viscous colloid. Component B is mainly a curing agent, primarily composed of aliphatic or aromatic amines, such as diethylenetriamine, triethylenetetramine, and diethanolamine, and is usually a relatively viscous, colorless to pale yellow liquid. Chinese patent document CN119159730A discloses an epoxy resin vacuum casting machine, including a mixing tank, a support frame, a sealing cap, a drive motor, a filling pipe, a vacuum pump, a rotatable mixing and crushing frame structure, a guide-type real-time monitoring vacuum pipe structure, and a unidirectional discharge anti-backflow pipe structure. The support frame is bolted to the left and right sides of the bottom of the mixing tank; the sealing cap is bolted to the top of the mixing tank. With the development of specialized collaboration, ton-sized epoxy resin A and B components can be directly purchased from the market as raw materials. During use, the two components are mixed to form epoxy resin raw materials for casting. However, existing epoxy resin casting equipment cannot well adapt to this raw material form, which is not conducive to fully utilizing the advantages of this raw material and restricts the improvement of production efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a current transformer dispensing machine suitable for closed-loop control and automatic feeding, so as to better suit the epoxy resin AB raw material form of ton drum packaging, facilitate on-site use, and improve production efficiency.

[0004] The technical solution of this utility model is: a current transformer glue dispensing machine suitable for closed-loop control and automatic feeding, comprising:

[0005] A material mixing tank, used for mixing material A, is equipped with a material A inlet pipe for connecting to a material A ton, and a material A inlet pump is installed on the material A inlet pipe;

[0006] A B-material mixing tank is used for mixing B-material and is equipped with a B-material inlet pipe for connecting to a B-material ton container. A B-material inlet pump is installed on the B-material inlet pipe.

[0007] A mixer for mixing material A and material B is provided with a material A conveying pipe for connecting to the outlet of the material A mixer, a material B conveying pipe for connecting to the outlet of the material B mixer, and a discharge port for discharging the material. Material A conveying pump and material B conveying pump are respectively provided on the material A conveying pipe and the material B conveying pipe.

[0008] Preferably, the A material feed pump is a high-viscosity gear pump.

[0009] Preferably, the feed pump for material B is a high-viscosity gear pump.

[0010] Preferably, the A material conveying pump is a screw metering pump.

[0011] Preferably, the B material conveying pump is a screw metering pump.

[0012] Preferably, the mixing tank for material A is equipped with a stirring device, such as a spiral stirrer.

[0013] Preferably, the agitator of the A material mixing tank is provided with a wall scraping structure (e.g., a wall scraping blade that can fit against / approach the inner wall of the tank during operation).

[0014] Preferably, the mixing tank for material B is equipped with a stirring device, such as a spiral mixer.

[0015] Preferably, the agitator of the B material mixing tank is provided with a wall scraping structure (e.g., a wall scraping blade that can fit against / approach the inner wall of the tank during operation).

[0016] Preferably, the mixing tank for material A is equipped with a heating and insulation structure.

[0017] Preferably, the heating and insulation structure of the A material mixing tank is an electric heating structure (e.g., an electric heating tape) or a steam heating structure (e.g., a sandwich structure for steam circulation).

[0018] Preferably, the mixing tank for material B is equipped with a heating and insulation structure.

[0019] Preferably, the heating and insulation structure of the B material mixing tank is an electric heating structure (e.g., an electric heating tape) or a steam heating structure (e.g., a sandwich structure for steam flow).

[0020] Preferably, the mixer is equipped with a heating and heat preservation structure.

[0021] Preferably, the heating and insulation structure of the mixer is an electric heating structure (e.g., an electric heating tape) or a steam heating structure (e.g., a sandwich structure for steam flow).

[0022] Preferably, the A material feed pipe is equipped with a heating and insulation structure.

[0023] Preferably, the heating and insulation structure of the A material feed pipe is an electric heat tracing structure (e.g., an electric heat tracing tape) or a steam heat tracing structure (e.g., a sandwich structure for steam flow).

[0024] Preferably, the feed pipe for material B is equipped with a heating and insulation structure.

[0025] Preferably, the heating and insulation structure of the B material feed pipe is an electric heat tracing structure (e.g., an electric heat tracing tape) or a steam heat tracing structure (e.g., a sandwich structure for steam flow).

[0026] Preferably, the material A conveying pipe is equipped with a heating and insulation structure.

[0027] Preferably, the heating and insulation structure of the A material conveying pipe is an electric heat tracing structure (e.g., an electric heat tracing tape) or a steam heat tracing structure (e.g., a sandwich structure for steam flow).

[0028] Preferably, the B material conveying pipe is equipped with a heating and insulation structure.

[0029] Preferably, the heating and insulation structure of the B material conveying pipe is an electric heat tracing structure (e.g., an electric heat tracing tape) or a steam heat tracing structure (e.g., a sandwich structure for steam flow).

[0030] Preferably, the mixing tank for material A is equipped with an electronic scale (or electronic scale sensor, which may be a weight sensor or a pressure sensor) for real-time detection of its weight.

[0031] Preferably, an electronic scale for real-time detection of the weight of the A material mixing tank is positioned between the A material mixing tank and its base.

[0032] Preferably, the mixing tank for material B is equipped with an electronic scale (weight sensor) for real-time detection of its weight.

[0033] Preferably, an electronic scale for real-time detection of the weight of the B material mixing tank is located between the B material mixing tank and the B material mixing tank base.

[0034] The beneficial effects of this utility model are as follows: Through the system combination of related equipment, the ton containers storing epoxy resin AB components can be used as raw material tanks. Materials can be directly fed from the corresponding ton containers through the feed pipes of each component, better adapting to the ton container packaging form, simplifying the feeding process, and eliminating the need to stop subsequent production processes due to material addition, thus better adapting to continuous production lines; the use of a high-viscosity gear pump as the feed pump better adapts to the characteristics of the AB component raw materials, ensuring reliable conveying; the use of an electronic scale to weigh the mixing tank, with the real-time weight of the mixing tank as the basis for feeding control, allows for automatic feeding control to maintain the amount of raw material in each component mixing tank, facilitating stable system operation and overcoming the problem of unclear material quantity due to blurred glass sight glasses on the tank; the use of electronic scales to weigh the mixing tank, using the real-time weight of the mixing tank as the basis for feeding control, ensures the amount of raw material in each component mixing tank is maintained, promoting stable system operation and overcoming the problem of unclear material quantity due to blurred glass sight glasses on the tank; the use of electronic scales to weigh the mixing tank, with the real-time weight of the mixing tank as the basis for feeding control, ensures the amount of raw material in each component mixing tank is maintained automatically, promoting stable system operation and overcoming the problem of unclear material quantity due to blurred glass sight glasses on the tank; and the use of electronic scales to weigh the mixing tank, with the use of electronic scales to weigh the mixing tank, facilitates the system's stable operation and overcoming the problem of unclear material quantity due to blurred glass sight glasses. The sub-scales are positioned between the mixing tank and its support. Specifically, three electronic scales, evenly spaced (equiangularly spaced), support the mixing tank, allowing for real-time monitoring of the total weight of the tank and its contents while maintaining tank stability. This ensures real-time monitoring of the material quantity (weight / mass) within the tank. The agitator's wall-scraping structure prevents materials from adhering to the tank wall for extended periods, thus guaranteeing mixing efficiency and output quality. The use of metering pumps, particularly screw metering pumps, to feed the A and B components to the mixer ensures the accuracy and reliability of the component dosages and their proportions. Furthermore, electric heating tracing on equipment (e.g., mixing tank, mixer) and pipelines allows for heating and temperature control as needed, ensuring smooth system operation.

[0035] This invention is applicable to epoxy resin casting of current transformers, and also to the potting operations of other suitable products and other suitable AB materials. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of a device and pipeline connection method according to this utility model;

[0038] Figure 3 This is a front view schematic diagram of one embodiment of the present invention;

[0039] Figure 4 Is with Figure 3 Corresponding top view diagram;

[0040] Figure 5 Is with Figure 3 Corresponding side view diagram;

[0041] The diagram shows the following components: 10. Container; 11. Mixing tank for component A; 12. Mixing tank for component B; 16. Mixing device; 18. Electronic scale; 19. Electronic scale foundation; 20. Control box; 24. Gear high viscosity pump; 26. Screw metering pump; 28. Two-position three-way valve; 31. Static mixer; 33. Discharge port; 41. Component A ton container; 42. Component B ton container; 51. Cleaning tank; 53. Compressed air inlet pipe. Detailed Implementation

[0042] See Figures 1 to 5 This dispensing machine includes a chassis 10, a component A mixing tank 11, a component B mixing tank 12, a screw metering pump 26, a high-viscosity gear pump 24, a static mixer 31, and a cleaning tank 51. Each mixing tank is connected to component A ton 41 and component B ton 42 via its own feed pipe. The material in the ton 41 is fed into the mixing tank by activating the corresponding high-viscosity gear pump. Pipelines and valves can be installed according to actual needs. A compressed air source can be connected via a compressed air inlet pipe 53 to introduce compression control according to process requirements. Pipeline switching control can be achieved via a two-position three-way valve 28, a three-position three-way valve 29, etc., to optimize or save on pipeline layout and control the material transfer within the pipeline.

[0043] The control box 20 can be installed on the machine body. A controller and display can be configured according to usage requirements. The controller can utilize any suitable existing technology, such as a PLC programmable controller, and implement corresponding controls based on the actual process flow. The outputs of the electronic scales (electronic scale sensors) 18, used to weigh each mixing tank in real time, are connected to the controller and used to control the high-viscosity gear pumps. When the real-time weight of the mixing tank / the real-time material level in the tank is below the lower limit, the corresponding high-viscosity gear pump is started to feed material. When the real-time weight of the mixing tank / the real-time material level in the tank reaches the upper or lower limit, the corresponding high-viscosity gear pump is shut down. Solenoid valves, frequency converters, contactors, operation buttons, and indicator lights can be configured based on existing technology and actual needs. For example, by using PLC programming for automatic control, the screw metering pump achieves precise flow rate measurement by changing the motor speed. Components A and B are then delivered to the static mixer. The epoxy resin, after being uniformly mixed in the static mixer, is discharged from outlet 33 and used to cast the current transformer. Through precise measurement of components A and B, the ratio and flow rate of components A and B are ensured to meet process requirements and guarantee casting quality.

[0044] Each mixing tank, as well as each feed pipe and conveying pipe, is equipped with heating and insulation functions (e.g., using electric heat tracing technology). Each mixing tank is equipped with a mixing function, such as a mechanical agitator 16, which may be equipped with wall scraping blades. Two electronic scale controller displays are linked to the PLC programmable controller via RS485 to feed back the resin weight information of the tank to the PLC programmable controller, ensuring stable operation of the system.

[0045] Protection functions can be configured via a PLC programmable controller. For example, a low-pressure interlock function can be implemented, triggering an alarm and stopping operation when the pressure drops below 0.4 MPa. Similarly, through corresponding interlock function settings, alarms can be issued to stop operation and an anti-curing alarm function for the mixer can be implemented in situations such as temperature below a set value, lack of mixing in the mixing tank, or material levels below the lower limit. Appropriate sensors can be configured according to control requirements (including interlock functions) to obtain basic data for real-time control.

[0046] A cleaning system can be set up based on existing technology, including a cleaning tank 51 for storing the cleaning fluid, as well as corresponding pipelines, valves, pumps, etc. After the pouring work is completed, the static mixer is automatically cleaned by operating the buttons on the control box.

[0047] The dispensing machine has a storage tank with a capacity of 50 liters. To meet the needs of continuous operation in 3 shifts 24 hours a day, an automatic feeding system is designed. Components A and B are stored in ton containers. The ton containers are connected to the high-viscosity gear pump and the corresponding A and B component mixing tanks of the dispensing machine through pipelines. The electronic scale of the dispensing machine has upper and lower limit setting functions. When the value is lower than the lower limit, the high-viscosity gear pump is started to automatically feed the material. When the value is reached, the pump automatically stops.

[0048] Electronic scales can be set up to measure the real-time weight of each mixing tank based on actual needs. For example, the top of the base of the mixing tank of material A is provided with three electronic scale bases (e.g., three protrusions on the top surface of the base, or three support rods or other support structures extending upwards from the base)19, which are distributed on the same circumference at equal intervals (equiangular distances). Alternatively, an annular bracket can be used to mount the electronic scales. The top surface shape of the electronic scale base is adapted to the installation and fixation of the electronic scales. The three electronic scales used to detect the weight of the mixing tank of material A in real time are fixedly installed on their respective electronic scale bases or fixedly mounted on the annular bracket (e.g., an annular support structure that can support the annular bracket is provided on the side wall of the electronic scale base). The mixing tank of material A is set on these three electronic scales, and its weight is entirely supported by these three electronic scales. Therefore, the sum of the weights measured by these three electronic scales is the weight of the mixing tank of material A.

[0049] Similarly, the top of the B material mixing tank base is provided with three electronic scale bases (e.g., three protrusions on the top surface of the base, or three support rods or other support structures extending upwards from the base)19, which are distributed at equal intervals (equiangular distances) on the same circumference, or an annular bracket for mounting the electronic scales. The top surface shape of the electronic scale base is adapted to the installation and fixation of the electronic scales. The three electronic scales used to detect the weight of the B material mixing tank in real time are respectively fixedly installed on their respective electronic scale bases or fixedly mounted on the annular bracket (e.g., an annular support structure that can support the annular bracket is provided on the side wall of the electronic scale base). The B material mixing tank is set on these three electronic scales, and its weight is entirely supported by these three electronic scales. Thus, the sum of the weights weighed by these three electronic scales is the weight of the B material mixing tank.

[0050] Before injecting material (material A or material B), the weight of each mixing tank (material A mixing tank and material B mixing tank) is obtained based on the readings of the corresponding electronic scale. After injecting the material, the weight of the mixing tank before injecting the material is subtracted from the real-time weight of the mixing tank (which can be called the self-weight of the mixing tank), which gives the real-time weight of the material inside the tank. To ensure data comparability, other weight-related conditions (e.g., other components connected or installed on the tank) should remain consistent, except before or after injecting the material. Alternatively, other calibration methods can be used to calibrate the weight of the material weighed by the electronic scale. For example, after injecting a determined weight of material (which can be determined before or after injecting the material into the tank), the self-weight of the mixing tank can be calculated based on the electronic scale reading (the weight of the mixing tank including the material weight) and the material weight, which is used for material weight calculation during real-time material weight detection.

[0051] The electronic scale / material weight controller in the mixing tank can be set in the control box to display the weight of the resin in the tank. The electronic scale controllers and corresponding displays (showers) for the two mixing tanks are connected to the PLC programmable controller via RS485. The weight information of the resin in the tank is fed back to the PLC programmable controller. Through logic calculation, it is ensured that the weight of the resin flowing into and out of the metering pump is the same, so as to realize closed-loop control.

[0052] An automatic start terminal can be reserved on the control device to facilitate connection with the production line.

[0053] Compared with existing equipment, this utility model has the following characteristics:

[0054] 1) The mixing tank is equipped with an electronic scale sensor. The electronic scale controller on the control box can display the weight of the material (resin) in the tank in real time. The weight of the material in the tank can be obtained by simple calculation through the electronic scale reading, without having to rely solely on the glass sight glass installed on the tank to observe how much material is in the tank. In particular, since the resin material will adhere to the inner wall of the glass sight glass, it will become difficult to see clearly through the glass sight glass after a long period of use.

[0055] 2) A feeding system is installed that allows direct feeding from the ton containers. When the material is used up, there is no need to stop the machine to add more material, enabling continuous operation under closed-loop control. Components A and B can be stored in ton containers. The ton containers are connected to the corresponding mixing tank in the dispensing machine via pipelines and a high-viscosity gear pump. The control device can be set with upper and lower limit settings for the electronic scale (or the material in the tank). The output of the electronic scale is connected to the control device. When the weight of the material in the tank is lower than the lower limit, the control device starts the high-viscosity gear pump to automatically feed the material. When the upper limit is reached, the pump automatically stops, thus meeting the requirements for 24-hour, 3-shift continuous operation.

[0056] 3) Based on actual needs and existing technology, interlocking functions can be added to address situations such as non-compliant air pressure, non-compliant temperature, lack of mixing in the mixing tank, and material levels in the mixing tank below the lower limit, thus ensuring product quality. For example, a low-pressure interlocking function can be set up, triggering an alarm and stopping operation when the air pressure drops below 0.4 MPa. Similarly, alarms can be issued to stop operation when the temperature is below the set value, the mixing tank is not mixing, or the material levels in the mixing tank are below the lower limit, along with an anti-curing alarm function for the mixer.

[0057] Unless otherwise specified, the preferred and optional technical means disclosed in this utility model can be arbitrarily combined to form several different specific embodiments when one preferred or optional technical means is a further limitation of another technical means.

Claims

1. A current transformer glue-dispensing machine suitable for closed-loop control and automatic feeding, characterized in that, include: A material mixing tank, used for mixing material A, is equipped with a material A inlet pipe for connecting to a material A ton, and a material A inlet pump is installed on the material A inlet pipe; A B-material mixing tank is used for mixing B-material and is equipped with a B-material inlet pipe for connecting to a B-material ton container. A B-material inlet pump is installed on the B-material inlet pipe. A mixer for mixing material A and material B is provided with a material A conveying pipe for connecting to the outlet of the material A mixer, a material B conveying pipe for connecting to the outlet of the material B mixer, and a discharge port for discharging the material. Material A conveying pump and material B conveying pump are respectively provided on the material A conveying pipe and the material B conveying pipe.

2. The current transformer glue-dispensing machine as described in claim 1, characterized in that, Both the A-material feed pump and the B-material feed pump are high-viscosity gear pumps.

3. The current transformer glue-dispensing machine as described in claim 1, characterized in that, Both the A-material conveying pump and the B-material conveying pump are screw metering pumps.

4. The current transformer glue-dispensing machine as described in claim 1, characterized in that, Both the A-material mixing tank and the B-material mixing tank are equipped with a mixing device.

5. The current transformer glue-dispensing machine as described in claim 1, characterized in that, The mixing tanks for material A and material B, as well as the mixer, are all equipped with heating and insulation structures.

6. The current transformer glue-dispensing machine as described in claim 5, characterized in that, The heating and insulation structures of the A-material mixing tank, B-material mixing tank, and mixer are electric heating structures or steam heating structures.

7. The current transformer dispensing machine as described in claim 1, characterized in that, The A material feed pipe, B material feed pipe, A material conveying pipe, and B material conveying pipe are all equipped with heating and insulation structures.

8. The current transformer glue-dispensing machine as described in claim 7, characterized in that, The heating and insulation structure of the A material feed pipe, B material feed pipe, A material conveying pipe and B material conveying pipe is an electric heat tracing structure or a steam heat tracing structure.

9. The current transformer glue-dispensing machine as described in any one of claims 1-8, characterized in that, Both the A-material mixing tank and the B-material mixing tank are equipped with electronic scales for real-time weight monitoring.

10. The current transformer glue-dispensing machine as described in claim 9, characterized in that, An electronic scale for real-time detection of the weight of material A mixing tank is installed between material A mixing tank and its base, and an electronic scale for real-time detection of the weight of material B mixing tank is installed between material B mixing tank and its base.

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