Liquid medicament adding device

Abstract

The utility model relates to the technical field of liquid dosing, and provides a liquid medicament dosing device which comprises a storage tank, one end of the first pipeline communicates with the storage tank; the end suction pump is provided with a first opening and a second opening, and the first opening is communicated with the other end of the first pipeline; and the chemical feeding pipe is communicated with the second opening and is used for conveying chemicals. By means of the technical scheme, the problem that in the prior art, when a metering pump outputs liquid medicine, pulses are formed, and deviation of a flowmeter occurs in the metering process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid dosing, and in particular to a liquid medicine dosing device. Background Art

[0002] At present, most liquid medicine dosing systems use diaphragm metering pumps. When the metering pump outputs liquid medicine, pulses are formed, which causes deviations in the flow meter during the metering process. Even if a back pressure valve and an air chamber pulse damper are installed at the rear end of the metering pump to reduce the pulse, it can still have a certain impact on the measurement accuracy of the rear end flow meter. Utility Model Content

[0003] The utility model provides a liquid medicine dosing device, which solves the problem in the related art that a metering pump forms pulses when outputting liquid medicine, causing a flow meter to have deviations during the metering process.

[0004] The technical solution of the utility model is as follows:

[0005] A liquid medicine dosing device, comprising:

[0006] Storage tanks;

[0007] A first pipeline, one end of which is connected to the storage tank;

[0008] an end suction pump having a first opening and a second opening, wherein the first opening is connected to the other end of the first pipeline;

[0009] A drug administration tube is communicated with the second opening and is used for delivering drugs.

[0010] Optionally, it also includes:

[0011] A three-way connection, connected to the second opening, having a first outlet and a second outlet, wherein the drug administration tube is connected to the first outlet and is connected to the second opening through the first outlet;

[0012] A reflux pipe has one end connected to the second outlet and the other end connected to the storage tank.

[0013] Optionally, it also includes:

[0014] A filter is arranged on the first pipeline, and the filter is used to filter impurities flowing into the end suction pump.

[0015] Optionally, it also includes:

[0016] The first valve is arranged on the first pipeline and is located between the storage tank and the filter. The first valve is used to open the storage tank.

[0017] Optionally, it also includes:

[0018] The second valve is arranged on the medication tube, and the second valve is used to open the medication tube.

[0019] Optionally, it also includes:

[0020] The third valve is arranged on the drug feeding tube, and the third valve is used to control the drug feeding flow rate of the drug feeding tube.

[0021] Optionally, the third valve comprises:

[0022] A flow meter, arranged on the drug administration tube, and used to detect the flow in the drug administration tube;

[0023] An automatic valve, arranged on the drug feeding pipe, and used to control the drug feeding flow rate of the drug feeding pipe;

[0024] A control unit has one end connected to the flow meter and the other end connected to the automatic valve.

[0025] Optionally, it also includes:

[0026] A back pressure valve is arranged on the reflux pipe, and the back pressure valve is used to provide pressure.

[0027] Optionally, it also includes:

[0028] An inspection hole is provided on the storage tank, and the reflux pipe is connected to the storage tank through the inspection hole.

[0029] Optionally, the second valve is a manual valve.

[0030] The working principle and beneficial effects of the utility model are:

[0031] In the utility model, in order to solve the problem that the metering pump in the related art forms pulses when outputting liquid medicine, causing the flow meter to deviate during the metering process, this solution abandons the metering pump and uses an end suction pump to transport the liquid medicine. This method does not have pulses, and the pulse reduction equipment in the subsequent process is removed, which not only makes the metering process more accurate, but also reduces the cost and the equipment footprint of the entire system, and has great practicality. This solution uses an end suction pump to sequentially transport the liquid medicine in the storage tank to the first pipeline, the first opening, the second opening and the dosing tube for dosing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0033] Figure 1 It is a schematic diagram of the structure of the utility model;

[0034] In the figure: 1. storage tank, 2. first pipeline, 3. end suction pump, 5. dosing pipe, 6. reflux pipe, 7. filter, 8. first valve, 9. second valve, 10. third valve, 10-1. flow meter, 10-2. automatic valve, 10-3. control unit, 11. back pressure valve, 12. inspection hole, 13. tee. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, they can also be understood as further technical solutions without paying creative work. In some figures, components with the same structure or function are only schematically illustrated, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0036] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Reference Figure 1 , which is the first embodiment of the utility model, proposes

[0039] A liquid medicine dosing device comprises: a storage tank 1; a first pipe 2, one end of which is connected to the storage tank 1; an end suction pump 3, having a first opening and a second opening, the first opening being connected to the other end of the first pipe 2; and a medicine dosing tube 5, which is connected to the second opening and is used for conveying medicine.

[0040] In this embodiment, in order to solve the problem that the metering pump in the related art forms pulses when outputting liquid medicine, causing the flow meter 10-1 to have deviations during the metering process, this solution abandons the metering pump and uses the end suction pump 3 to transport the liquid medicine. This method does not have pulses, and the pulse reduction equipment in the subsequent process is removed, which not only makes the metering process more accurate, but also reduces the cost and the equipment footprint of the entire system, and has great practicality. This solution uses the end suction pump 3 to sequentially transport the liquid medicine in the storage tank 1 to the first pipeline 2, the first opening, the second opening and the dosing tube 5 for dosing.

[0041] Furthermore, it also includes: a tee 13, which is connected to the second opening and has a first outlet and a second outlet. The drug feeding tube 5 is connected to the first outlet and is connected to the second opening through the first outlet; a reflux tube 6, one end of which is connected to the third opening and the other end is connected to the storage tank 1.

[0042] In this embodiment, in order to ensure the stability of the liquid medicine in the entire pipeline, this solution designs a reflux pipe 6. When the demand for liquid medicine decreases, the liquid medicine can be discharged back into the storage tank 1 through the adjustment of the reflux pipe 6 and the valve 11 to prevent the end suction pump from cavitation, mechanical seal and bearing damage due to the flow rate being far less than the rated flow rate of the end suction pump 3, thereby affecting the normal operation of the end suction pump. Since the medicine circulates in the storage tank 1, the first pipeline 2 and the reflux pipe 6, the freezing of the medicine due to low temperature in winter can be reduced. This solution installs a tee 13 on the end suction pump 3, the inlet of the tee 13 is connected to the second opening, the first outlet of the tee 13 is connected to the dosing pipe 5, and the second outlet of the tee 13 is connected to the reflux pipe 6.

[0043] Furthermore, it also includes: a filter 7, which is arranged on the first pipeline 2, and the filter 7 is used to filter impurities flowing into the end-suction pump 3.

[0044] In this embodiment, in order to prevent impurities from entering the end-suction pump 3, a filter 7 is designed on the first pipeline 2. The liquid medicine will enter the end-suction pump 3 only after passing through the filter 7, thereby preventing impurities from affecting the normal operation of the end-suction pump 3.

[0045] Furthermore, it also includes: a first valve 8, which is arranged on the first pipeline 2 and is located between the storage tank 1 and the filter 7. The first valve 8 is used to control the outflow of the liquid medicine in the storage tank and ensure the maintenance of the subsequent unit when it fails. It also includes: a second valve 9, which is arranged on the drug injection pipe 5. The second valve 9 is used to control the switch of the drug injection pipe 5. It also includes: a third valve 10, which is arranged on the drug injection pipe 5. The third valve 10 is used to control the drug injection flow rate of the drug injection pipe 5.

[0046] In this embodiment, when the equipment is working, the first valve 8, the second valve 9 and the third valve 10 are opened. The first valve 8 controls the process of the liquid medicine entering the end suction pump 3. The second valve 9 is used to open the dosing tube 5. After the second valve 9 is opened, the liquid medicine can enter the dosing storage chamber. For accurate dosing, the third valve 10 is designed behind the second valve 9 in this scheme. After opening the third valve 10, the opening of the third valve 10 can be controlled to control the specific amount of the dosing medicine.

[0047] Furthermore, the third valve 10 includes: a flow meter 10-1, which is arranged on the medication tube 5, and the flow meter 10-1 is used to detect the flow in the medication tube 5; an automatic valve 10-2, which is arranged on the medication tube 5, and the automatic valve 10-2 is used to control the medication flow in the medication tube 5; a control unit 10-3, one end of which is connected to the flow meter 10-1, and the other end is connected to the automatic valve 10-2.

[0048] In this embodiment, in order to achieve control of the dosage, the flow meter 10-1 in this scheme is a gear flow meter 10-1, the control unit 10-3 is PCL, the automatic valve 10-2 and the flow meter 10-1 are connected to the control cabinet of the control unit 10-3, the flow meter 10-1 feeds back the flow value to the control unit 10-3, and the control unit 10-3 automatically adjusts the opening of the automatic valve 10-2 by comparing the set flow rate with the flow rate of the flow meter 10-1, thereby achieving the purpose of regulating the flow rate.

[0049] Furthermore, it also includes: a back pressure valve 11, which is arranged on the return pipe 6, and the back pressure valve 11 is used to provide pressure.

[0050] In this embodiment, in order to ensure that there is sufficient feeding pressure when the liquid agent is added, a back pressure valve 11 is installed on the return pipe 6, and the pressure of the back pressure valve 11 is adjusted to provide pressure for the rear end dosing pipe 5. The working principle of the back pressure valve 11 is to use a spring or water hammer (sudden movement of the liquid) to generate pressure upstream of the valve. When the pressure in the system drops below the set point, the spring or water hammer pushes the valve to open, allowing the fluid to flow and increase the pressure. When the pressure rises to the set point, the valve closes to prevent further fluid flow.

[0051] Furthermore, it also includes: an inspection hole 12, which is arranged on the storage tank 1, and the reflux pipe 6 is connected to the storage tank 1 through the inspection hole 12.

[0052] In this embodiment, in order to observe the situation inside the storage tank 1, an inspection hole 12 is designed on the storage tank 1. Under normal circumstances, a lid is screwed on the storage tank 1 to prevent debris from entering the storage tank 1. By unscrewing the lid, the inspection hole 12 is regularly checked to ensure that the reflux is normal.

[0053] Furthermore, the second valve 9 is a manual valve.

[0054] In this embodiment, in order to prevent the third valve 10 from being damaged and the liquid agent from being unable to be quantitatively added and the machine from being unable to be shut down for maintenance, the second valve 9 is designed as a manual valve. When the third valve 10 is damaged, the second valve 9 can be manually controlled to stop urgently for maintenance.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A liquid medicine dosing device, characterized in that: include: Storage tank (1); A first pipeline (2), one end of which is connected to the storage tank (1); An end suction pump (3) having a first opening and a second opening, wherein the first opening is in communication with the other end of the first pipeline (2); A drug administration tube (5) is communicated with the second opening, and the drug administration tube (5) is used for delivering drugs.

2. A liquid medicine dosing device according to claim 1, characterized in that: Also includes: A three-way connection (13) is connected to the second opening and has a first outlet and a second outlet. The drug administration tube (5) is connected to the first outlet and is connected to the second opening through the first outlet. A reflux pipe (6) has one end connected to the second outlet and the other end connected to the storage tank (1).

3. A liquid medicine dosing device according to claim 1, characterized in that: Also includes: A filter (7) is arranged on the first pipeline (2), and the filter (7) is used to filter impurities flowing into the end suction pump (3).

4. A liquid medicine dosing device according to claim 3, characterized in that: Also includes: A first valve (8) is arranged on the first pipeline (2) and is located between the storage tank (1) and the filter (7), and the first valve (8) is used to open the storage tank (1).

5. A liquid medicine dosing device according to claim 1, characterized in that: Also includes: The second valve (9) is arranged on the drug administration tube (5), and the second valve (9) is used to open the drug administration tube (5).

6. A liquid medicine dosing device according to claim 1, characterized in that: Also includes: The third valve (10) is arranged on the drug feeding tube (5), and the third valve (10) is used to control the drug feeding flow rate of the drug feeding tube (5).

7. A liquid medicine dosing device according to claim 6, characterized in that: The third valve (10) comprises: A flow meter (10-1) is arranged on the drug administration tube (5), and the flow meter (10-1) is used to detect the flow rate in the drug administration tube (5); An automatic valve (10-2) is arranged on the drug administration tube (5); A control unit (10-3) has one end connected to the flow meter (10-1) and the other end connected to the automatic valve (10-2), wherein the control unit (10-3) is used to receive a signal from the flow meter (10-1) and adjust the automatic valve (10-2).

8. A liquid medicine dosing device according to claim 2, characterized in that: Also includes: A back pressure valve (11) is arranged on the reflux pipe (6), and the back pressure valve (11) is used to provide pressure to the drug administration pipe (5).

9. A liquid medicine dosing device according to claim 2, characterized in that: Also includes: An inspection hole (12) is provided on the storage tank (1), and the return pipe (6) is connected to the storage tank (1) through the inspection hole (12).

10. A liquid medicine dosing device according to claim 5, characterized in that: The second valve (9) is a manual valve.

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