Injection solution raw material feeding device

Abstract

The utility model relates to injection production equipment technical field especially, and it is injection raw material feeding device, a kind of injection raw material feeding device, including frame, the frame is provided with gripper by clamping mechanism, the inside of gripper is clamped with cylinder, the cylinder has first working position and second working position when adding raw material, the upper portion of frame is provided with the drive mechanism of driving cylinder overturn to first working position, the upper portion of drive mechanism is provided with sensor, the sensor is used to identify the weight change of raw material inside cylinder, to decide the opportunity of cylinder overturn from first working position to second working position.

Description

Technical Field

[0001] This utility model relates to the technical field of injection production equipment, and in particular to an injection raw material feeding device. Background Technology

[0002] In the production of injectable solutions, the feeding of raw materials is a critical step with extremely high requirements for safety, precision, and sterility. Raw materials are typically stored and transported in drum-shaped containers, and during production, they need to be aseptically and safely transferred from the drums to the reaction vessel or mixing equipment. To improve feeding efficiency and automation, existing technologies often employ a tilting and unloading mechanism. This mechanism includes a wheeled frame, a clamping mechanism mounted on the upper part of the frame, and a tilting mechanism. The clamping mechanism secures the raw material drum, while the tilting mechanism drives the drum to rotate in space, thus discharging the raw material.

[0003] However, in practice, to completely empty the remaining injection solution material from the container, the tilting mechanism often needs to tilt the container to a large angle (e.g., greater than 90°, typically around 135°). When the container is tilted to such an angle, its gravity will generate a lateral force, which can easily cause the container to slip or even fall off in the clamping mechanism. This slippage can not only damage the equipment, but more seriously, in the production environment of injection solutions, which has strict requirements for cleanliness and container integrity, the accidental detachment or severe friction of the container may introduce contamination risks, generate particulate matter, and even lead to the scrapping of expensive raw materials, posing significant safety and quality hazards.

[0004] While theoretically, increasing the clamping force of the clamping mechanism can improve friction, the materials used in injection solution raw material containers (such as specific grades of plastic or coated metal linings) must meet the compatibility and safety requirements of pharmaceutical packaging, thus limiting their pressure resistance and deformation resistance. Excessive clamping force may cause container deformation and damage to the inner coating, thereby increasing the risk of contamination. Therefore, the clamping force of the clamping mechanism has a strict upper limit, and simply increasing the clamping force is not a feasible solution for injection solution production.

[0005] To address the aforementioned issues, existing technologies lack an intelligent control mechanism that can simultaneously ensure thorough dispensing and operational safety. Some general solutions attempt to adjust the tilting angle through mechanical limits or time control, but these cannot detect real-time weight changes of the injection liquid raw materials inside the container. This results in either incomplete dispensing affecting the accuracy of the proportioning, or excessive tilting causing slippage risks, neither of which can meet the stringent requirements for precise dispensing and absolute safety in injection liquid production. Utility Model Content

[0006] To overcome the problems in existing technologies where the injection raw material container slips and falls off due to excessive tilting angle during the tilting and unloading process, and where it is impossible to ensure complete unloading while maintaining operational safety, this utility model provides an injection raw material feeding device. This device uses sensors to monitor changes in the weight of the raw material in real time and intelligently controls the tilting mechanism to tilt in two stages, thereby achieving the technical effects of preventing the raw material container from slipping off, ensuring thorough unloading, and ensuring safe and reliable operation.

[0007] The technical solution adopted by this utility model to solve its technical problem is: an injection liquid raw material feeding device, including a frame, the frame is provided with a clamping claw through a clamping mechanism, the inner side of the clamping claw holds a cylinder, the cylinder has a first working position and a second working position when adding raw materials, the upper part of the frame is provided with a driving mechanism for driving the cylinder to flip to the first working position, the upper part of the driving mechanism is provided with a sensor, the sensor is used to identify the weight change of the raw materials inside the cylinder, so as to determine the timing of the cylinder flipping from the first working position to the second working position.

[0008] The aforementioned injection raw material feeding device includes a clamping mechanism comprising a frame plate that abuts against the cylinder, wherein the grippers are symmetrically arranged on the outside of the frame plate and are hinged to it.

[0009] The aforementioned injection raw material feeding device includes a drive mechanism comprising a swing arm rotatably connected to the frame, wherein the swing arm is fixedly connected to the frame plate via a connecting rod.

[0010] In the aforementioned injection raw material feeding device, a first hydraulic cylinder is hinged between the swing arm and the vehicle frame, and the sensor is connected in series in the rodless chamber oil circuit of the first hydraulic cylinder through a three-way pipe.

[0011] In the above-mentioned injection raw material feeding device, a second hydraulic cylinder is connected between the grippers to control the opening and closing of the grippers on the cylinder.

[0012] The aforementioned injection raw material feeding device has a frame plate that is adapted to the outer wall of the cylinder in a semi-circular shape.

[0013] In the above-mentioned injection raw material feeding device, the sensor is a hydraulic pressure sensor.

[0014] The aforementioned injection raw material feeding device has movable casters arranged at intervals under the frame.

[0015] The beneficial effects of this utility model are: 1. Effectively prevent slippage and detachment: By setting two fixed flipping working positions, and tilting most of the raw materials in the first working position (such as the horizontal state), the raw material bucket has no lateral slippage force, which fundamentally avoids the risk of slippage caused by its large weight in the initial stage.

[0016] 2. Ensure complete emptying of raw materials: When the sensor detects that the raw material has decreased to a safe threshold, the system is then controlled to flip to the second working position (such as a large-angle tilt state) so that the small amount of raw material remaining in the container can be completely poured out, ensuring the accuracy of the injection solution preparation.

[0017] 3. Achieve intelligent safety control: The timing of the flipping is automatically controlled by real-time monitoring of the raw material weight through sensors, replacing the single mechanical limit or time control. This makes the operation safe and reliable, and can adapt to different initial weights of raw materials, with a high degree of intelligence.

[0018] 4. Compact structure and cost optimization: The weight sensing function is integrated into the hydraulic circuit of the drive mechanism itself, eliminating the need for an additional complex weighing mechanism. While achieving the core function, the structure is simplified and the manufacturing cost is reduced. Attached Figure Description

[0019] The present invention will be further described below with reference to the embodiments and examples.

[0020] Figure 1 This is a schematic diagram of the initial state structure of the cylinder.

[0021] Figure 2 This is a schematic diagram of the initial state structure of an embodiment.

[0022] Figure 3 This is a schematic diagram of the first working position state structure of an embodiment.

[0023] Figure 4 This is a schematic diagram of the second working position state structure in an embodiment.

[0024] Figure 5 This is a schematic diagram of the working process of the first hydraulic cylinder.

[0025] In the diagram: 1. Frame; 2. Cylinder; 3. Frame plate; 4. Gripper; 5. Second hydraulic cylinder; 6. Swing arm; 7. Connecting rod; 8. First hydraulic cylinder; 9. Sensor. Detailed Implementation

[0026] The core of the injection raw material feeding device provided by this utility model lies in the intelligent sensing of the weight change of the raw material by the sensor 9, and the control of the flipping mechanism to flip in two stages, thereby ensuring that the raw material is completely poured out, while effectively preventing the raw material container from slipping and falling off due to excessive gravity during the flipping process. It is particularly suitable for the injection production field where safety and operational precision are extremely important.

[0027] like Figure 1-5As shown, the injection liquid raw material feeding device of this embodiment mainly includes a frame 1, which serves as the main support for the entire device. Multiple movable casters are arranged at intervals below the frame 1, allowing the device to move flexibly to different workstations for feeding operations. A clamping mechanism is located on the upper part of the frame 1 to reliably clamp the cylinder 2 containing the injection liquid raw material. A drive mechanism is located on the upper part of the frame 1 to drive the entire clamping mechanism and the cylinder 2 it clamps to rotate.

[0028] The clamping mechanism mainly includes a frame plate 3 and grippers 4. The frame plate 3 is designed as a semi-circle to fit the outer wall of the cylinder 2, providing good initial positioning and support. The grippers 4 are symmetrically arranged on the outside of the frame plate 3 and are hinged to the frame plate 3 through a hinge shaft. A second hydraulic cylinder 5 is connected between the two grippers 4. When the piston rod of the second hydraulic cylinder 5 extends or retracts, it can drive the two grippers 4 to rotate around the hinge shaft, thereby realizing the clamping or releasing operation of the cylinder 2.

[0029] The drive mechanism mainly includes a swing arm 6, a connecting rod 7, and a first hydraulic cylinder 8. One end of the swing arm 6 is rotatably connected to the frame of the vehicle frame 1 via a rotating shaft. The connecting rod 7 is fixedly connected between the swing arm 6 and the frame plate 3 of the clamping mechanism, and is used to transmit the rotation of the swing arm 6 to the clamping mechanism so that it rotates synchronously. The cylinder body of the first hydraulic cylinder 8 is hinged to the vehicle frame 1, and the end of its piston rod is hinged to the swing arm 6. By extending and retracting the piston rod of the first hydraulic cylinder 8, the swing arm 6 can be driven to swing around the rotating shaft, and then the clamping mechanism and the cylinder 2 are rotated as a whole through the connecting rod 7.

[0030] In this embodiment, the sensor 9 is preferably a hydraulic pressure sensor 9, which is connected in series with the oil circuit of the rodless chamber of the first hydraulic cylinder 8 through a three-way pipe. Its working principle is as follows: when the cylinder 2 is in a flipped state, its gravitational torque will generate a reverse force on the piston rod of the first hydraulic cylinder 8, and this force will be directly reflected in the hydraulic pressure of the rodless chamber of the first hydraulic cylinder 8. Therefore, by monitoring the change in hydraulic pressure of the rodless chamber, the total weight change of the cylinder 2 and the raw materials inside it can be indirectly and accurately calculated.

[0031] The control logic for sensor 9 is as follows: System calibration: Before sensor 9 is put into use, a simple calibration is required. First, without placing a raw material barrel on the clamping mechanism, flip it to the first working position (90° horizontal), and the control system records the pressure value at this time as the empty reference pressure P_empty. Then, clamp a standard full-load raw material barrel and flip it to the same position, and record the pressure value as the full-load pressure P_full. Based on these two calibration values, the system calculates the critical pressure threshold P_threshold corresponding to when the remaining amount of raw material is one-third (or other preset proportion).

[0032] Real-time monitoring and judgment: Basic working principle: When the tilting mechanism is stationary or rotating slowly at a constant speed, the product of the hydraulic pressure P in the rodless chamber of the main hydraulic cylinder and the effective area A of the piston, i.e., the resulting thrust F, must be balanced with the torque formed by the gravity of the entire tilted part (clamping mechanism and raw material barrel). Therefore, at any fixed tilting angle, the hydraulic pressure P is directly proportional to the total weight G of the raw material barrel and its internal materials. By monitoring the change in pressure P, the change in total weight can be accurately and indirectly sensed. Control logic execution: During the process of unloading material from the raw material barrel while it is stable in the first working position, the hydraulic pressure sensor 9 continuously monitors the real-time pressure value P_current in the rodless chamber of the main hydraulic cylinder; the control system continuously compares P_current with the pre-calibrated and stored critical pressure threshold P_threshold; if P_current > P_threshold, it is determined that there is still a large amount of raw material remaining, and the control system keeps the main hydraulic cylinder in position and continues unloading material from the first working position; if P_current ≤ P_threshold, it is determined that the raw material has been reduced to the safety threshold, and the potential sliding force generated by the remaining self-weight is no longer sufficient to pose a risk, so it is triggered and flipped to the second working position. After the principle of unloading is completed, the drive mechanism resets.

[0033] Referring to the accompanying drawings, the working process of this device is as follows: 1. Initial state and preparation: The device moves to the target workstation; the second hydraulic cylinder 5 of the clamping mechanism is activated, driving the gripper 4 to close, reliably clamping the cylinder 2 filled with injection liquid raw material between the frame plate 3 and the gripper 4; at this time, the cylinder 2 is in the initial vertical position; 2. Start and flip to the first working position: The operator or the central control system issues a start command; the first hydraulic cylinder 8 starts working, driving the swing arm 6 to rotate, which in turn drives the clamping mechanism and the cylinder 2 to start flipping through the connecting rod 7; when flipped to about ninety degrees (i.e. the first working position), the cylinder 2 is in a horizontal state, and the raw material begins to tilt stably; in this position, the direction of gravity of the cylinder 2 is vertically downward, and it hardly generates a component force that causes it to slide laterally relative to the gripper 4, so the clamping is the most stable and reliable; 3. Real-time monitoring and judgment by sensor 9: During the process of the cylinder 2 being in the first working position and pouring material, the hydraulic pressure sensor 9 continuously monitors the real-time pressure value of the rodless chamber of the first hydraulic cylinder 8. Loop judgment: The control system continuously compares the real-time pressure value with a preset critical pressure value; the critical pressure value corresponds to the state when the weight of the raw material in the cylinder 2 drops to a safe threshold (e.g., half or one-third of the initial total weight); If the real-time pressure value is greater than the critical value, it indicates that there is still a lot of raw material remaining in the cylinder, and the potential risk of slippage caused by its own weight still exists; the control system controls the first hydraulic cylinder 8 to maintain the current position, so that the material pouring process continues in the first working position; If the real-time pressure value is less than or equal to the critical value, it means that most of the material in the cylinder has been poured out and the remaining weight has been significantly reduced, reaching the preset safety threshold. At this time, even if it is further turned over, the lateral sliding force generated by the weight of the remaining material is small and cannot overcome the maximum static friction of the clamping mechanism. 4. Trigger and flip to the second working position: When the real-time pressure value meets the condition of being less than or equal to the critical value, the sensor 9 feeds back the signal to the control system; the control system then restarts the first hydraulic cylinder 8, and the drive mechanism continues to move, flipping the cylinder 2 further from the first working position to about 135 degrees (i.e., the second working position); in this final tilted position, it can be ensured that the small amount of injection liquid raw material remaining on the inner wall of the cylinder 2 is completely and thoroughly emptied, meeting the high requirements of injection liquid production for the accuracy of raw material feeding; since the total weight of the cylinder 2 and its remaining raw material is very small at this time, the lateral sliding force generated is insufficient to overcome the static friction of the gripper 4, thus perfectly solving the contradiction between thoroughly emptying the material and preventing slippage.

[0034] 5. Reset: After feeding is completed, the first hydraulic cylinder 8 moves in the reverse direction, driving the cylinder 2 to return to the vertical initial position via the second working position and the first working position; the second hydraulic cylinder 5 of the clamping mechanism is activated, the gripper 4 is released, and a new raw material barrel can be replaced to prepare for the next operation.

[0035] This specific embodiment cleverly integrates the hydraulic pressure sensor 9 into the oil circuit of the first hydraulic cylinder 8 that drives the tilting process, achieving indirect, reliable, and low-cost real-time monitoring of the raw material weight. Based on this monitoring data, the tilting process is intelligently divided into two stages, perfectly balancing material discharge efficiency, thoroughness, and operational safety. It is particularly suitable for feeding scenarios such as injectable liquid raw materials, which have stringent requirements for cleanliness, safety, and feeding accuracy.

Claims

1. A device for feeding raw materials for injection solutions, characterized in that: The device includes a frame, which is equipped with grippers via a clamping mechanism. The grippers hold a cylinder on their inner side. The cylinder has a first working position and a second working position when adding raw materials. The upper part of the frame is equipped with a drive mechanism that drives the cylinder to flip to the first working position. The upper part of the drive mechanism is equipped with a sensor that is used to identify the weight change of the raw materials inside the cylinder in order to determine when the cylinder flips from the first working position to the second working position.

2. The injection raw material feeding device according to claim 1, characterized in that: The clamping mechanism includes a frame plate that abuts against the cylinder, and the grippers are symmetrically arranged on the outside of the frame plate and hinged to it.

3. The injection raw material feeding device according to claim 2, characterized in that: The drive mechanism includes a swing arm that is rotatably connected to the frame, and the swing arm is fixedly connected to the frame plate by a connecting rod.

4. The injection raw material feeding device according to claim 3, characterized in that: A first hydraulic cylinder is hinged between the swing arm and the frame, and the sensor is connected in series with the rodless chamber oil circuit of the first hydraulic cylinder through a three-way pipe.

5. The injection raw material feeding device according to claim 1 or 2, characterized in that: A second hydraulic cylinder is connected between the grippers to control the opening and closing of the grippers on the cylinder.

6. The injection raw material feeding device according to claim 2, characterized in that: The frame plate is semi-circular and adapts to the outer wall of the cylinder.

7. The injection raw material feeding device according to claim 1 or 4, characterized in that: The sensor is a hydraulic pressure sensor.

8. The injection raw material feeding device according to claim 1, characterized in that: The frame is equipped with spaced casters for easy movement.

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