Central medicine supply system

Abstract

The utility model discloses a central medicine supply system in the technical field of circuit board manufacturing, and aims to solve the problems that in the prior art, the liquid level identification capability of liquid medicine is poor, and the function of controlling overflowing of the liquid medicine needs to be enhanced urgently. The method comprises the steps that a non-contact liquid level meter is adopted to detect the liquid level of a pesticide supply barrel, the non-contact liquid level meter is in signal connection with a control background, anti-overflow control can be conducted in advance, and data integration and analysis can be conducted in the later period; the non-contact liquid level meter is not in direct contact with the liquid medicine, so that the failure probability is reduced; on the basis that a non-contact liquid level meter is adopted to replace a traditional scheme, the height difference is designed for communication points at the two ends of a conveying pipeline, and a liquid medicine lifting pump is used for driving liquid medicine to overcome gravity to be conveyed to a medicine supply barrel; the liquid medicine in the conveying pipeline and part of the liquid medicine exceeding the first warning liquid level in the medicine supply barrel flow back into the liquid medicine storage barrel by means of gravity, and the overflow condition is prevented in a high-reliability mode.

Description

Technical Field

[0001] This utility model relates to a central drug supply system and belongs to the field of circuit board manufacturing technology. Background Technology

[0002] The Central Chemicals Supply and Dispensing Control (CDC) system is a device used in circuit board manufacturing plants to supply chemical solutions. Its control backend can supply the chemical solutions to the production site through corresponding pipelines according to the set ratio.

[0003] However, during the drug supply process, the liquid level in the medicine tank is often too high, or the float valve malfunctions, causing the medicine to overflow.

[0004] Therefore, the existing central drug supply system has poor ability to identify drug liquid level and its function of controlling drug liquid overflow urgently needs to be strengthened. Utility Model Content

[0005] The purpose of this application is to overcome the shortcomings of the prior art and provide a central drug supply system that reliably meets the requirements of drug level identification and effectively prevents drug overflow.

[0006] To achieve the above objectives, this application employs the following technical solution:

[0007] This application provides a central drug supply system, including,

[0008] The system includes a medicine supply tank and a medicine storage tank connected to the medicine supply tank via a delivery pipeline. The delivery pipeline is equipped with a medicine lifting pump for lifting and delivering the medicine to the medicine supply tank. The connection point between the delivery pipeline and the medicine storage tank is lower than the connection point between the delivery pipeline and the medicine supply tank, and the connection point between the delivery pipeline and the medicine supply tank is not higher than the first warning level of the medicine supply tank.

[0009] A non-contact level gauge, used to detect the liquid level in the medicine supply tank;

[0010] The non-contact level gauge and the medicine booster pump are respectively connected to the control backend. The non-contact level gauge is used to transmit the liquid level of the medicine supply tank to the control backend, and the medicine booster pump is started / stopped according to the control signal from the control backend.

[0011] In some embodiments of this application, a liquid level float is also included, which is arranged in the medicine supply tank and is connected to the control backend signal. The liquid level float is used to transmit a liquid level trigger signal to the control backend. The non-contact liquid level gauge is an ultrasonic liquid level gauge.

[0012] In some embodiments of this application, the distance between the level float and the non-contact level gauge exceeds a first threshold, and the arrangement height of the level float corresponds to the second warning level of the drug supply tank, while the body of the non-contact level gauge is fixed to the edge of the drug supply tank.

[0013] In some embodiments of this application, an overflow pipe is also included, which is connected to the drug supply tank and the drug storage tank respectively, and the height of the connection point between the overflow pipe and the drug supply tank is not higher than the third warning liquid level of the drug supply tank.

[0014] In some embodiments of this application, there are multiple medicine supply tanks with different elevations, and the overflow pipe is also used to connect the multiple medicine supply tanks with different elevations.

[0015] In some embodiments of this application, the medicine storage tank is connected to the medicine delivery pipe, and medicine is supplied to the medicine storage tank from the outside through the medicine delivery pipe. The height of the connection point between the medicine delivery pipe and the medicine storage tank exceeds the fourth warning level of the medicine storage tank.

[0016] In some embodiments of this application, the medicine storage tank is equipped with a second level gauge and a level float, which are respectively connected to the control backend. The second level gauge is used to transmit the level of the medicine storage tank to the control backend, and the level float is used to transmit a level trigger signal to the control backend. The medicine delivery pipe is equipped with a medicine delivery pump, which is connected to the control backend and is used to start / stop according to the control signal from the control backend.

[0017] In some embodiments of this application, the control backend is also connected to an alarm signal, and the alarm is used to start / stop according to the control signal from the control backend.

[0018] In some embodiments of this application, the bottom of the drug supply tank is also connected to a drug supply pipe, which supplies the drug liquid to the production site by gravity.

[0019] In some embodiments of this application, the installation height of the medicine supply tank exceeds the usage height of the medicine storage tank.

[0020] Compared with the prior art, the beneficial effects achieved by this application are as follows:

[0021] The central drug supply system provided in this application uses a non-contact level gauge to detect the liquid level in the drug supply tank and connects the non-contact level gauge to the control backend. This not only meets the need for early overflow prevention control but also allows for later data integration and analysis. Since the non-contact level gauge does not come into direct contact with the liquid, the probability of it malfunctioning due to corrosion is reduced. Based on replacing the traditional solution with a non-contact level gauge, the connection point between the delivery pipeline and the drug storage tank is located at a lower height than the connection point between the delivery pipeline and the drug supply tank. A drug lift pump is used to drive the liquid to overcome gravity and deliver it to the drug supply tank. This ensures that when the drug lift pump stops in response to the control signal from the control backend, the liquid in the delivery pipeline and the portion of the liquid in the drug supply tank exceeding the first warning level flow back to the drug storage tank by gravity, reliably preventing overflow. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the central drug supply system provided in this embodiment;

[0024] In the diagram: 1. Medicine delivery pump; 2. Medicine storage tank; 3. Liquid level float; 4.1. Non-contact liquid level gauge; 4.2. Second liquid level gauge; 5. Alarm; 6. Medicine booster pump; 7. Overflow pipe; 8. Medicine supply pipe; 9. Medicine supply tank; 10. Medicine delivery pipe; 11. Control panel; 12. Delivery pipeline. Detailed Implementation

[0025] The technical solutions of this application / the embodiments thereof will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application / the embodiments thereof, and not all embodiments thereof. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application / the application thereof or its application or use. Example 1

[0026] This embodiment provides a central drug supply system to solve the problems of poor reliability in drug liquid level recognition and lack of control over drug liquid overflow in the prior art.

[0027] refer to Figure 1The central drug supply system provided in this embodiment includes a drug supply tank 9 for supplying liquid medicine to the production site and a drug storage tank 2 for centrally storing liquid medicine to be used. Each drug storage tank 2 corresponds to at least one drug supply tank 9. Multiple drug supply tanks 9 are arranged according to the needs of the production line. The drug supply tank 9 and the drug storage tank 2 are connected by a conveying pipeline 12.

[0028] It is worth noting that although this embodiment is named "Central Medicine Supply System", there may be multiple medicine storage tanks 2, and a single medicine supply tank 9 may be connected to multiple medicine storage tanks 2 at the same time.

[0029] The working principle of the level float 3: The level float 3 is usually composed of a hollow spherical object filled with air. When the level float 3 is placed in a liquid, the liquid, due to gravity, will generate an upward buoyancy force on the float, thus triggering a signal. However, unlike other implementation environments, the liquid required by the circuit board is highly corrosive, and the material of the level float 3 is often related to plastic, which is similar to the resin material used in the circuit board. This can cause the level float 3 to become less sensitive after prolonged use.

[0030] To overcome this problem, this embodiment uses a non-contact level gauge 4.1 to detect the liquid level in the medicine tank 9. The non-contact level gauge 4.1 is connected to the control backend 11 via wired or wireless signal. Since the non-contact level gauge 4.1 does not come into direct contact with the medicine, the probability of malfunction is reduced. The control backend 11 relies on the accurate liquid level data issued by the non-contact level gauge 4.1 to not only meet the overflow prevention control requirements, but also support subsequent data integration and analysis.

[0031] Based on the replacement of the traditional solution with a non-contact level gauge 4.1, in this embodiment, the connection point between the delivery pipeline 12 and the medicine storage tank 2 is located at a lower height than the connection point between the delivery pipeline 12 and the medicine supply tank 9. A medicine lift pump 6 arranged on the delivery pipeline 12 is used to drive the medicine to overcome gravity and be transported from the medicine storage tank 2 to the medicine supply tank 9. The delivery route can be referenced. Figure 1 The arrows are shown. The medicine booster pump 6 stops in response to the control signal from the control backend 11. The medicine in the delivery pipeline 12 and the portion of medicine in the medicine tank 9 that exceeds the first warning level flow back to the medicine storage tank 2 by gravity, preventing overflow. This anti-overflow scheme relies on the inherent delivery pipeline 12 and is based on the principle of gravity, so it has high reliability.

[0032] As one embodiment, the non-contact level gauge 4.1 can be implemented in other forms known in the art, such as radar level gauges, infrared level gauges, laser level gauges, or photoelectric level sensors, and many other known forms, which will not be described in detail here.

[0033] In summary, the central drug supply system provided in this embodiment not only meets the requirements of drug level recognition but also reliably prevents drug overflow.

[0034] Non-unique usage method: When a new batch of medicine arrives at the medicine storage tank 2, the control panel 11 sends a start signal to the medicine booster pump 6. The medicine is then transported to the corresponding supply tank 9 via the medicine booster pump 6 and the delivery pipeline 12. If, due to human error or malfunction, the medicine delivery volume exceeds the expected design level in the supply tank 9, personnel at the control panel 11 or the program within the control panel 11 will detect the excessive medicine delivery volume based on the non-contact level gauge 4.1 and send a stop signal to the medicine booster pump 6. The medicine in the delivery pipeline 12 and the portion of the medicine in the supply tank 9 exceeding the first warning level will flow back to the medicine storage tank 2 by gravity through the delivery pipeline 12.

[0035] It is worth noting that the first warning level is not simply the upper limit of the liquid level. It can be designed to be located near the bottom of the medicine supply tank 9. The purpose is to ensure that the liquid level drops. For example, the delivery pipeline 12 can be directly connected to the bottom of the medicine supply tank 9, that is, the first warning level is 0. In this way, no matter how low the actual liquid level of the medicine supply tank 9 is, as long as it is higher than the liquid level of the medicine storage tank 2, it can be gravity-fed back through the delivery pipeline 12. However, this will increase the burden on the medicine booster pump 6. Therefore, the value of the first warning level needs to be determined by those skilled in the art. Example 2

[0036] This embodiment provides a central drug supply system. This embodiment is an optimization based on Embodiment 1 to improve the technical effect and refine the technical solution. For details not described in this embodiment, please refer to Embodiment 1.

[0037] As one embodiment, the installation height of the medicine supply tank 9 can be set to exceed the usage height of the medicine storage tank 2, so as to realize the height difference between the two connection points of the delivery pipeline 12.

[0038] As one embodiment, the control backend 11 includes at least the following two situations: ① The control backend 11 is a manual operation panel, where the liquid level of the medicine tank 9 or other related signals can be displayed on the control backend 11, and the staff can control the start / stop of the medicine lift pump 6 on the control backend 11 as needed; ② The control backend 11 is a PLC controller, which stores a pre-designed program and issues start / stop signals to the medicine lift pump 6 according to different liquid level data.

[0039] Therefore, as one embodiment, reference is made to Figure 1 The control backend 11 is also connected to the alarm 5, which is used to start / stop the alarm according to the control signal from the control backend 11.

[0040] Despite the aforementioned drawbacks of the level float 3, its working principle differs from that of the non-contact level gauge 4.1. The level float 3 measures the liquid level based on the mechanical principle of floating, and its output is a one-time triggered signal; while the non-contact level gauge 4.1 generally relies on optical, acoustic, or radio wave penetration detection, and its output is a specific distance value. Therefore, to provide better data support for level control, this embodiment uses a combination of level float 3 and non-contact level gauge 4.1 for detection within the medicine supply tank 9, complementing each other based on two different detection principles and signal properties.

[0041] refer to Figure 1 As one embodiment, the central drug supply system also includes a level float 3 disposed in the drug supply tank 9. The level float 3 is signal-connected to the control backend 11 and is used to transmit a level trigger signal to the control backend 11. Meanwhile, the non-contact level gauge 4.1 is an ultrasonic level gauge, with a probe such as... Figure 1 As shown by the vertical line, which is perpendicular to the liquid surface and pointing downwards, compared with other types of non-contact level gauges 4.1, ultrasonic level gauges calculate the liquid level height by measuring the time difference between the emission and reception of sound waves and combining it with the speed of sound. This enables high-precision measurement, with some models achieving a resolution of 0.01% femtosecond, meeting the needs of precise control of liquid levels in circuit board manufacturing.

[0042] To ensure they do not interfere with each other, refer to Figure 1 The distance between the level float 3 and the non-contact level gauge 4.1 exceeds the first threshold, and the arrangement height of the level float 3 corresponds to the second warning level of the medicine supply tank 9. Once the actual level reaches the second warning level, a level trigger signal is immediately transmitted. The body of the non-contact level gauge 4.1 is fixed to the edge of the medicine supply tank 9. In this way, even if the actual level exceeds the second or other warning levels, the non-contact level gauge 4.1 can still continuously monitor the level until the level rises to overflow from the edge of the medicine supply tank 9.

[0043] Even though the probability is small, there is a possibility that the control backend 11 may malfunction or be unattended. To prevent the medicine from overflowing under these conditions, please refer to... Figure 1 In one embodiment, the central drug supply system also includes an overflow pipe 7, which is connected to both the drug supply tank 9 and the drug storage tank 2. The height of the connection point between the overflow pipe 7 and the drug supply tank 9 is not higher than the third warning level of the drug supply tank 9. When the drug level reaches the height of the connection point between the overflow pipe 7 and the drug supply tank 9, excess drug overflows from the overflow pipe 7 into the drug storage tank 2.

[0044] In one embodiment, the inlet of the overflow pipe 7 is located on the inner wall of the medicine supply tank 9, and the outlet of the medicine supply tank 9 is as follows: Figure 1 The outward extension can extend above the medicine storage tank 2, however... Figure 1To avoid drawing conflicts between the overflow pipe 7 and the signal connection line, the image showing "extending to the top of the medicine storage tank 2" is not shown.

[0045] The above-mentioned overflow pipe 7 arrangement scheme can satisfy the requirement of radiating multiple medicine supply tanks 9 from the medicine storage tank 2 as the center through multiple overflow pipes 7, but this also limits the layout flexibility of the central medicine supply system.

[0046] As one embodiment, there is also a height difference between the medicine supply tanks 9. Some of the overflow pipes 7 are also used to connect multiple medicine supply tanks 9 with different heights. The medicine supply tanks 9 that are farther away are higher, and the overflowing medicine flows through the overflow pipes 7 into other medicine supply tanks 9 that are closer to the medicine storage tank 2 and are lower in height. Through multiple overflow pipes 7 and medicine supply tanks 9, the medicine overflows to the medicine storage tank 2 in relay, which improves the flexibility of the central medicine supply system layout.

[0047] As one embodiment, the height of the medicine supply tank 9 / medicine storage tank 2 in this embodiment may not simply refer to the installation height, but may also be regarded as the height of the connection point between the medicine supply tank 9 / medicine storage tank 2 and the conveying pipeline 12 or overflow pipe 7 and other pipe fittings.

[0048] The medicine storage tank 2 also needs protection against medicine overflow, but considering that medicine storage tank 2 generally has a high capacity, as one embodiment, refer to Figure 1 The medicine storage tank 2 is connected to the medicine delivery pipe 10. Medicine is supplied to the medicine storage tank 2 from the outside through the medicine delivery pipe 10. The height of the connection point between the medicine delivery pipe 10 and the medicine storage tank 2 exceeds the fourth warning level of the medicine storage tank 2. In most cases, even if the liquid level in the medicine storage tank 2 exceeds the fourth warning level, as long as it does not reach the height of the connection point between the medicine delivery pipe 10 and the medicine storage tank 2, the liquid will not overflow from the medicine delivery pipe 10 in reverse. The high capacity of the medicine storage tank 2 is generally used to prevent overflow.

[0049] As one embodiment, the external source of the medicine can be a tanker truck.

[0050] As one embodiment, the medicine storage tank 2 can adopt a similar structure to the medicine supply tank 9, see reference. Figure 1 The medicine storage tank 2 is equipped with a second level gauge 4.2 and a level float 3, both of which are signal-connected to the control backend 11. The second level gauge 4.2 transmits the liquid level of the medicine storage tank 2 to the control backend 11, and the level float 3 transmits a level trigger signal to the control backend 11. The medicine delivery pipe 10 is equipped with a medicine delivery pump 1, which is signal-connected to the control backend 11 and is used to start / stop according to the control signal from the control backend 11. The control support function of this structure for the control backend 11 is the same as that of the medicine supply tank 9, and will not be described again here. As one embodiment, the second level gauge 4.2 can also be an ultrasonic level gauge.

[0051] As one embodiment, reference Figure 1 The bottom of the medicine supply tank 9 is also connected to the medicine supply pipe 8, which supplies the medicine to the production site by gravity.

[0052] In summary, the central drug supply system provided in this embodiment improves the liquid level warning effect and overflow effect compared with Embodiment 1.

[0053] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The aforementioned "first," "second," etc., "warning liquid levels" are set based on the experience of those skilled in the art and industry requirements.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," "equipped with," "located in," "installed," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. "Hinged connection" includes "rotational connection."

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A central medicine supply system, characterized in that, include, A medicine supply tank (9) and a medicine storage tank (2) connected to the medicine supply tank (9) via a delivery pipeline (12). The delivery pipeline (12) is equipped with a medicine lifting pump (6) for lifting and delivering medicine to the medicine supply tank (9). The connection point between the delivery pipeline (12) and the medicine storage tank (2) is lower than the connection point between the delivery pipeline (12) and the medicine supply tank (9), and the connection point between the delivery pipeline (12) and the medicine supply tank (9) is not higher than the first warning level of the medicine supply tank (9). A non-contact level gauge (4.1) is used to detect the liquid level in the medicine supply tank (9); The non-contact level gauge (4.1) and the medicine booster pump (6) are respectively connected to the control backend (11). The non-contact level gauge (4.1) is used to transmit the liquid level of the medicine supply tank (9) to the control backend (11). The medicine booster pump (6) is started / stopped according to the control signal of the control backend (11).

2. The central drug supply system according to claim 1, characterized in that, It also includes a level float (3) arranged in the medicine supply tank (9), the level float (3) is connected to the control backend (11) by signal, and the level float (3) is used to transmit the level trigger signal to the control backend (11); the non-contact level gauge (4.1) is an ultrasonic level gauge.

3. The central drug supply system according to claim 2, characterized in that, The distance between the level float (3) and the non-contact level gauge (4.1) exceeds the first threshold, and the arrangement height of the level float (3) corresponds to the second warning level of the drug supply tank (9), while the body of the non-contact level gauge (4.1) is fixed to the edge of the drug supply tank (9).

4. The central drug supply system according to claim 1, characterized in that, It also includes an overflow pipe (7), which is connected to the medicine supply tank (9) and the medicine storage tank (2) respectively, and the height of the connection point between the overflow pipe (7) and the medicine supply tank (9) is not higher than the third warning liquid level of the medicine supply tank (9).

5. The central drug supply system according to claim 4, characterized in that, There are multiple medicine supply tanks (9) with different elevations, and the overflow pipe (7) is also used to connect the multiple medicine supply tanks (9) with different elevations.

6. The central drug supply system according to claim 1, characterized in that, The medicine storage tank (2) is connected to the medicine delivery pipe (10). Medicine is delivered from the outside to the medicine storage tank (2) through the medicine delivery pipe (10). The height of the connection point between the medicine delivery pipe (10) and the medicine storage tank (2) exceeds the fourth warning level of the medicine storage tank (2).

7. The central drug supply system according to claim 6, characterized in that, The medicine storage tank (2) is equipped with a second level gauge (4.2) and a level float (3) that are respectively connected to the control backend (11). The second level gauge (4.2) is used to transmit the level of the medicine storage tank (2) to the control backend (11), and the level float (3) is used to transmit the level trigger signal to the control backend (11). The medicine delivery pipe (10) is equipped with a medicine delivery pump (1). The medicine delivery pump (1) is connected to the control backend (11) and is used to start / stop according to the control signal of the control backend (11).

8. The central drug supply system according to claim 1, characterized in that, The control backend (11) is also connected to the alarm (5) via a signal, and the alarm (5) is used to start / stop according to the control signal of the control backend (11).

9. The central drug supply system according to claim 1, characterized in that, The bottom of the medicine supply tank (9) is also connected to the medicine supply pipe (8), which supplies the medicine to the production site by gravity.

10. The central drug supply system according to claim 1, characterized in that, The installation height of the medicine supply tank (9) exceeds the usage height of the medicine storage tank (2).

Images