A quantitative liquid discharger

Abstract

The invention discloses a quantitative liquid discharger, belonging to the technical field of medical auxiliary tools, comprising a storage box, a measuring cylinder, a waste liquid recovery cylinder, a small vacuum pump, a lifting device and a control system; the measuring cylinder is provided with a liquid extraction tube and a suction and pressure tube, and the suction and pressure tube is connected to the small vacuum pump; a solenoid valve is provided at the bottom of the measuring cylinder, and the solenoid valve is connected to the waste liquid recovery cylinder through a hose; the control system comprises a control module, a power supply module, a photoelectric sensor, a first relay and a second relay; wherein the photoelectric sensor is arranged on the lifting device and is height-adjustable; the control module controls the small vacuum pump and the solenoid valve to be powered on or off respectively through the first relay and the second relay according to the sensing condition of the photoelectric sensor; the invention is used to assist medical staff in quantitatively extracting excess physiological saline in bottled physiological saline, thereby solving the problem of increased workload and contamination risk of physiological saline for medical staff due to manual extraction of physiological saline.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary tools, and in particular to a quantitative liquid discharger. Background Art

[0002] The capacity of bottled saline used clinically is fixed, but in actual operation, medical staff need to take different capacities of saline according to different patients. Therefore, medical staff need to use a syringe to extract excess saline so that the volume of saline retained in the bottle meets the doctor's orders. For some patients, especially children, the amount of saline used is even less than half of the capacity of the whole bottle, so medical staff need to extract saline multiple times, which brings great inconvenience to medical staff. In addition, the operation of extracting saline multiple times also increases the risk of contamination of saline. Therefore, it is necessary to propose a quantitative discharger to solve the above problems. Summary of the invention

[0003] In view of the above, it is necessary to provide a quantitative discharger to assist medical staff in quantitatively extracting excess saline from bottled saline, thereby solving the problem of increased workload and risk of saline contamination for medical staff due to manual extraction of saline.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A quantitative liquid discharger, comprising a storage box, a measuring cylinder, a waste liquid recovery cylinder, a small vacuum pump, a lifting device and a control system;

[0006] The storage box comprises a box body and a box door arranged on one side of the box body;

[0007] The measuring cylinder is arranged on the top surface of the box body and is arranged vertically. The material of the measuring cylinder is white transparent material, and the outer circumferential surface of the measuring cylinder is provided with a capacity scale; the top of the measuring cylinder is provided with a sealing cover, and a liquid extraction tube is detachably connected to the sealing cover, and the liquid extraction tube is connected with the inner cavity of the measuring cylinder, and a liquid extraction needle is arranged at one end of the liquid extraction tube away from the sealing cover; the bottom of the measuring cylinder is provided with a solenoid valve, and the solenoid valve is a normally closed two-way valve. The bottom of the measuring cylinder is provided with a joint connected to the inner cavity of the measuring cylinder, one interface of the solenoid valve is connected to the joint, and the other interface of the solenoid valve is connected to a hose;

[0008] The waste liquid recovery cylinder is movably placed in the box, and one end of the hose away from the solenoid valve is movably placed in the waste liquid recovery cylinder;

[0009] The small vacuum pump is arranged in the box body and is provided with a suction pipe, one end of which is connected to the suction port of the small vacuum pump, and the other end of which passes through the box body and the sealing cover and extends to the upper part of the inner cavity of the measuring cylinder;

[0010] The lifting device comprises a lifting ring, a connecting rod, a nut, a screw, a knob and a scale positioning member; the lifting ring is movably sleeved on the outer circumference of the measuring cylinder, the lifting ring is horizontally arranged, and its inner diameter matches the outer diameter of the measuring cylinder; one side of the lifting ring is fixedly connected to the nut through the connecting rod; the screw is vertically arranged and threadedly connected to the nut, the bottom of the screw is rotatably connected to the top surface of the box, and the knob is arranged on the top of the screw; the scale positioning member is arranged on the top surface of the lifting ring, and comprises a positioning rod and a support rod, the positioning rod is horizontally arranged and fixedly connected to the lifting ring through the support rod;

[0011] The control system includes a control module, a power supply module, a photoelectric sensor, a first relay and a second relay; the control module, the power supply module, the first relay and the second relay are all arranged in the box, the photoelectric sensor is arranged on the top surface of the lifting ring, its sensing part faces the measuring cylinder, and the center of the sensing part of the photoelectric sensor is at the same horizontal height as the positioning rod; the power supply module, the photoelectric sensor, the first relay and the second relay are all electrically connected to the control module; the power supply module is electrically connected to the first relay, and the first relay is electrically connected to the small vacuum pump; the power supply module is electrically connected to the second relay, and the second relay is electrically connected to the solenoid valve;

[0012] When the liquid level in the measuring cylinder is at the same height as the center of the sensing part of the photoelectric sensor, the photoelectric sensor generates a feedback signal and sends it to the control module, the control module controls the first relay to operate, the power supply module is disconnected from the small vacuum pump, and the small vacuum pump is powered off and stops working; at the same time, the control module controls the second relay to operate, the power supply module establishes a connection with the solenoid valve, the solenoid valve is powered on, and the liquid in the measuring cylinder flows into the waste liquid recovery cylinder.

[0013] Preferably, one side of the box door is hinged to the box body through a hinge, and a visual window for observing the liquid level in the waste liquid recovery cylinder is provided in the middle of the box door.

[0014] Preferably, a tray is provided on the top surface of the box body at one side of the measuring cylinder, a support frame for hanging a physiological saline bottle upside down is provided in the middle of the tray, and a hook is provided on the upper part of the support frame.

[0015] Preferably, a threaded hole is provided on the top surface of the box body, the threaded hole is connected to the inner cavity of the box body, and the lower end of the measuring cylinder is threadedly connected to the threaded hole.

[0016] Preferably, the inner diameter of the measuring cylinder is 4 cm, and the range of the capacity scale is 30-200 mL.

[0017] Preferably, the inner diameter of the liquid extraction tube is 0.15-0.25 cm, and the length is 20-30 cm.

[0018] Preferably, the positioning rod is located above the lifting ring and on one side close to the inner ring surface.

[0019] Preferably, the photoelectric sensor is a through-beam photoelectric sensor.

[0020] Preferably, the control system further comprises an alarm module, and the alarm module is electrically connected to the control module.

[0021] Preferably, the control module is a single-chip computer module, the power supply module is a lithium-ion battery module, a charging port is provided on one side of the box, the charging port is electrically connected to the lithium-ion battery module, and the alarm module is a buzzer.

[0022] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] 1. The present invention is used to assist medical staff to quantitatively extract excess saline from bottled saline, thereby solving the problem of increased workload for medical staff due to manual extraction of saline. When in use, the medical staff first adjusts the photoelectric sensor to a suitable height through a lifting device so that the positioning rod of the scale positioning member is flush with the corresponding scale line; then, inserts the liquid extraction needle at one end of the liquid extraction tube into the saline bottle; finally, starts the control system and the small vacuum pump; the small vacuum pump extracts air in the measuring cylinder at a uniform speed, so that negative pressure is formed in the measuring cylinder, and the saline in the saline bottle enters the measuring cylinder through the liquid extraction tube; the photoelectric sensor of the control system is used to monitor the liquid level of the liquid in the measuring cylinder. When the liquid in the measuring cylinder is When the liquid level is at the same height as the center of the sensing part of the photoelectric sensor, the photoelectric sensor generates a feedback signal and sends it to the control module. The control module controls the first relay to act, the power supply module is disconnected from the small vacuum pump, the small vacuum pump is powered off and stops working, the liquid level in the measuring cylinder stops rising, and the capacity of the remaining saline in the saline bottle meets the use requirements; at the same time, the control module controls the second relay to act, the power supply module is connected to the solenoid valve, the solenoid valve is powered on, and the liquid in the measuring cylinder flows into the waste liquid recovery cylinder, so that the present invention can carry out a new drainage operation; the present invention can replace the traditional manual drainage, can reduce the workload of medical staff, and improve the work efficiency of medical staff.

[0024] 2. In the process of extracting saline solution of the present invention, only one puncture operation is required, and multiple punctures and extractions of saline solution are not required. Therefore, the risk of contamination of saline solution can be effectively reduced, and the safety of the use of saline solution can be ensured.

[0025] 3. The present invention is provided with a scale positioning piece on the lifting ring, which is convenient for medical staff to compare the positioning rod with the capacity scale, so as to quickly position the photoelectric sensor to a suitable height, which has good convenience.

[0026] 4. The measuring cylinder of the present invention is detachably connected to the body of the storage box, which is convenient for medical staff to remove the measuring cylinder for cleaning and disinfection as needed; the liquid extraction tube of the present invention is detachably connected to the sealing cover, which is convenient for medical staff to replace the liquid extraction tube as needed.

[0027] 5. The present invention is provided with a tray on one side of the measuring cylinder, a support frame for hanging a saline bottle upside down is provided in the middle of the tray, and a hook is provided on the upper part of the support frame; when in use, the saline bottle is hung upside down on the hook, so that the extraction needle can extract the saline in the saline bottle.

[0028] 6. The control system of the present invention is also provided with an alarm module. When the liquid level in the measuring cylinder is at the same height as the center of the sensing part of the photoelectric sensor, the control module generates an alarm signal and sends it to the alarm module. The alarm module executes an alarm action to remind the medical staff that the drainage operation is completed, so that the medical staff can use the remaining saline in the bottle in time.

[0029] 7. The present invention sets the photoelectric sensor on the lifting ring of the lifting device, so that the height of the photoelectric sensor is adjustable. Medical staff can easily adjust the photoelectric sensor to the height of the corresponding capacity scale as needed. The lifting and lowering adjustment operation of the present invention is very simple and can be achieved by simply rotating the knob. It has high stability and ensures the accuracy of capacity monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a front view of a quantitative liquid discharger provided in an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the internal structure of the quantitative liquid discharger provided in an embodiment of the present invention;

[0032] Figure 3 is a top view of a quantitative liquid discharger provided by an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of the connection between the lifting ring and the nut provided in an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of electrical connections of a quantitative liquid discharger provided in an embodiment of the present invention;

[0035] The main component symbols in the figure are explained as follows:

[0036] In the accompanying drawings, 1-box body, 2-box door, 3-visible window, 4-tray, 5-measuring cylinder, 6-capacity scale, 7-sealing cover, 8-liquid extraction tube, 9-liquid extraction needle, 10-suction and pressure tube, 11-solenoid valve, 12-hose, 13-waste liquid recovery cylinder, 14-small vacuum pump, 15-lifting ring, 16-connecting rod, 17-nut, 18-screw rod, 19-knob, 20-scale positioning part, 21-control module, 22-power supply module, 23-photoelectric sensor, 24-first relay, 25-second relay, 26-alarm module, 27-support frame.

[0037] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The drawings are only for illustrative purposes and represent only schematic diagrams, not physical drawings, and cannot be understood as limitations on this patent. In order to better illustrate the specific implementation methods of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures, parts and their descriptions in the drawings may be omitted. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" 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 an indirect connection 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 the present invention can be understood according to specific circumstances.

[0040] Example

[0041] like Figure 1-5 As shown, a quantitative liquid discharger includes a storage box, a measuring cylinder 5, a waste liquid recovery cylinder 13, a small vacuum pump 14, a lifting device and a control system.

[0042] The storage box includes a box body 1 and a box door 2 arranged on one side of the box body 1, wherein one side of the box door 2 is hinged to the box body 1 through a hinge, and a handle is arranged on the opposite side. A measuring cylinder 5 is arranged on the top surface of the box body 1 and is arranged vertically; wherein a threaded hole is provided on the top surface of the box body 1, the threaded hole is connected to the inner cavity of the box body 1, and the lower end of the measuring cylinder 5 is threadedly connected to the threaded hole. The measuring cylinder 5 is detachably connected to the box body 1, so that the medical staff can remove the measuring cylinder 5 for cleaning and disinfection as needed. The material of the measuring cylinder 5 is a white transparent material; in the present embodiment, the material of the measuring cylinder 5 is a white transparent plastic. A capacity scale 6 is arranged on the outer circumference of the measuring cylinder 5, the inner diameter of the measuring cylinder 5 is 4cm, and the range of the capacity scale 6 is 30-200mL, that is, the minimum scale is 30mL and the maximum scale is 200mL. The top of the measuring cylinder 5 is provided with a sealing cover 7, on which a liquid extraction tube 8 is detachably connected, the liquid extraction tube 8 is connected to the inner cavity of the measuring cylinder 5, and a liquid extraction needle 9 is provided at one end of the liquid extraction tube 8 away from the sealing cover 7. The inner diameter of the liquid extraction tube 8 is 0.15-0.25cm, and the length is 20-30cm, so that after the operation of extracting physiological saline is completed, there is less physiological saline remaining in the liquid extraction tube 8, and the error caused to the extraction result is small and can be ignored. In this embodiment, the inner diameter of the liquid extraction tube 8 is 0.2cm, and the length is 25cm. The liquid extraction tube 8 is detachably connected to the sealing cover 7, so that medical staff can replace the liquid extraction tube 8 as needed. Preferably, a convex head is provided at a position near the edge of the top surface of the sealing cover 7, and the convex head is provided with an opening connected to the inner cavity of the measuring cylinder 5, and one end of the liquid extraction tube 8 is provided with a matching port, and is sleeved on the convex head through the matching port. When the liquid extraction tube 8 needs to be replaced, the old liquid extraction tube 8 is pulled out, and the new liquid extraction tube 8 is inserted into the convex head.

[0043] The bottom of the measuring cylinder 5 is provided with a solenoid valve 11, which is a normally closed two-way valve. The bottom of the measuring cylinder 5 is provided with a joint connected to the inner cavity of the measuring cylinder 5. One interface of the solenoid valve 11 is connected to the joint, and the other interface of the solenoid valve 11 is connected to a hose 12. The waste liquid recovery cylinder 13 is movably placed in the box body 1, and one end of the hose 12 away from the solenoid valve 11 is movably placed in the waste liquid recovery cylinder 13. A visual window 3 for observing the liquid level in the waste liquid recovery cylinder 13 is provided in the middle of the box door 2. When it is found that there is more liquid in the waste liquid recovery cylinder 13, the waste liquid recovery cylinder 13 can be taken out, the liquid can be poured out, and then the waste liquid recovery cylinder 13 can be put back into the box body 1. A small vacuum pump 14 is arranged in the box body 1, and is provided with a suction pipe 10. One end of the suction pipe 10 is connected to the air extraction port of the small vacuum pump 14, and the other end passes through the box body 1 and the sealing cover 7, and extends to the upper part of the inner cavity of the measuring cylinder 5. Preferably, the suction and pressure pipe 10 is detachably connected to the sealing cover 7, the sealing cover 7 is provided with a perforation, a sealing ring is provided in the perforation, the suction and pressure pipe 10 passes through the sealing ring and is closely connected with the sealing ring. The box body 1 is provided with an air vent located on one side of the vacuum pump outlet.

[0044] The lifting device includes a lifting ring 15, a connecting rod 16, a nut 17, a screw 18, a knob 19 and a scale positioning member 20. The lifting ring 15 is movably sleeved on the outer circumference of the measuring cylinder 5. The lifting ring 15 is horizontally arranged, and its inner diameter matches the outer diameter of the measuring cylinder 5. One side of the lifting ring 15 is fixedly connected to the nut 17 through the connecting rod 16. The screw 18 is vertically arranged and threadedly connected to the nut 17. The bottom of the screw 18 is rotatably connected to the top surface of the box body 1, and the knob 19 is arranged on the top of the screw 18. The scale positioning member 20 is arranged on the top surface of the lifting ring 15, which includes a positioning rod and a support rod. The positioning rod is horizontally arranged and fixedly connected to the lifting ring 15 through the support rod. Preferably, the positioning rod is located on the side above the lifting ring 15 close to the inner ring surface.

[0045] The control system includes a control module 21, a power supply module 22, a photoelectric sensor 23, an alarm module 26, a first relay 24 and a second relay 25. The control module 21, the power supply module 22, the first relay 24 and the second relay 25 are all arranged in the box body 1, and the alarm module 26 is arranged on the outside of the box body 1. The photoelectric sensor 23 is arranged on the top surface of the lifting ring 15, and its sensing part faces the vector cylinder 5. The present invention arranges the photoelectric sensor 23 on the lifting ring 15 of the lifting device, so that the height of the photoelectric sensor 23 is adjustable. Medical staff can easily adjust the photoelectric sensor 23 to the height of the corresponding capacity scale 6 as needed, and the lifting and adjusting operation of the present invention is very simple, which can be achieved by rotating the knob 19, and the stability is high, ensuring the accuracy of capacity monitoring. The center of the sensing part of the photoelectric sensor 23 is at the same horizontal height as the positioning rod. The setting of the positioning member facilitates the medical staff to compare the positioning rod with the capacity scale 6, so as to quickly position the photoelectric sensor 23 to a suitable height, which has good convenience. The power supply module 22, the photoelectric sensor 23, the alarm module 26, the first relay 24 and the second relay 25 are all electrically connected to the control module 21, the power supply module 22 is electrically connected to the first relay 24, the first relay 24 is electrically connected to the small vacuum pump 14, the power supply module 22 is electrically connected to the second relay 25, and the second relay 25 is electrically connected to the solenoid valve 11.

[0046] Among them, the photoelectric sensor 23 is a beam-type photoelectric sensor 23, which includes a transmitter and a receiver arranged on the top surface of the lifting ring 15 and arranged oppositely. The model of the photoelectric sensor 23 is PEX-10FR of Yuanchuang Company. The transmitter is used to emit laser and the receiver is used to receive laser signals. When the liquid level in the measuring cylinder 5 is at the same height as the center of the sensing part of the photoelectric sensor 23, the photoelectric sensor 23 generates a feedback signal and sends it to the control module 21; specifically, when the liquid level of the physiological saline in the measuring cylinder 5 rises to the height of the center of the sensing surface of the receiver, the laser is injected into the physiological saline and refracted in the physiological saline. The receiver cannot receive the laser signal and generates a feedback signal and sends it to the control module 21. The control module 21 controls the first relay 24 to act, the power supply module 22 is disconnected from the small vacuum pump 14, and the small vacuum pump 14 is powered off and stops working. The control module 21 controls the second relay 25 to act, the power supply module 22 is connected to the solenoid valve 11, the solenoid valve 11 is powered on, and the liquid in the measuring cylinder 5 flows into the waste liquid recovery cylinder 13. At the same time, the control module 21 generates an alarm signal and sends it to the alarm module 26. The alarm module 26 performs an alarm action to remind the medical staff that the drainage operation is completed, so that the medical staff can use the remaining saline in the bottle in time. In this embodiment, the control module 21 is a single-chip microcomputer module, and the single-chip microcomputer model is STC89C52RC. The power supply module 22 is a lithium-ion battery module. A charging port is provided on one side of the box 1. The charging port is electrically connected to the lithium-ion battery module. The power supply module 22 is used to provide the power required by each module and the electrical appliance. The alarm module 26 is a buzzer.

[0047] In addition, a tray 4 is provided on the top surface of the box body 1 on one side of the measuring cylinder 5, and a support frame 27 for hanging a saline bottle upside down is provided in the middle of the tray 4. A hook is provided on the upper part of the support frame 27. When in use, the saline bottle is hung upside down on the hook to facilitate the extraction needle 9 to extract the saline in the saline bottle.

[0048] When the present invention is used, the medical staff first adjusts the photoelectric sensor 23 to a suitable height through the lifting device so that the positioning rod of the scale positioning member 20 is flush with the corresponding scale line (for example, 100 mL); then, the physiological saline bottle is hung upside down on the hook, and the liquid extraction needle 9 at one end of the liquid extraction tube 8 is inserted into the physiological saline bottle; finally, the control system and the small vacuum pump 14 are started; the small vacuum pump 14 extracts the air in the measuring cylinder 5 at a uniform speed, so that a negative pressure is formed in the measuring cylinder 5, and the physiological saline in the physiological saline bottle enters the measuring cylinder 5 through the liquid extraction tube 8; when the measuring cylinder 5 is full, the physiological saline in the physiological saline bottle enters the measuring cylinder 5 through the liquid extraction tube 8; When the liquid level in the measuring cylinder 5 reaches the height of the positioning rod, the control module 21 controls the first relay 24 to operate, the power supply module 22 is disconnected from the small vacuum pump 14, the small vacuum pump 14 is powered off and stops working, the liquid level in the measuring cylinder 5 stops rising, and the remaining volume of the saline in the saline bottle meets the use requirements; at the same time, the control module 21 controls the second relay 25 to operate, the power supply module 22 is connected to the solenoid valve 11, the solenoid valve 11 is powered on, and the liquid in the measuring cylinder 5 flows into the waste liquid recovery cylinder 13, thereby facilitating the present invention to carry out a new liquid discharge operation.

[0049] The present invention is used to assist medical staff to quantitatively extract excess saline from bottled saline, thereby solving the problem of increased workload for medical staff due to manual extraction of saline; the present invention can replace traditional manual drainage, reduce the workload of medical staff, and improve the work efficiency of medical staff. In addition, in the process of extracting saline, the present invention only requires one puncture operation, without multiple punctures and extraction of saline, thus effectively reducing the risk of saline contamination and ensuring the safety of saline use.

[0050] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A quantitative liquid discharger, characterized in that: It includes a storage box, a measuring cylinder, a waste liquid recovery cylinder, a small vacuum pump, a lifting device and a control system; The storage box comprises a box body and a box door arranged on one side of the box body; The measuring cylinder is arranged on the top surface of the box body and is arranged vertically. The material of the measuring cylinder is white transparent material, and the outer circumferential surface of the measuring cylinder is provided with a capacity scale; the top of the measuring cylinder is provided with a sealing cover, and a liquid extraction tube is detachably connected to the sealing cover, and the liquid extraction tube is connected with the inner cavity of the measuring cylinder, and a liquid extraction needle is arranged at one end of the liquid extraction tube away from the sealing cover; the bottom of the measuring cylinder is provided with a solenoid valve, and the solenoid valve is a normally closed two-way valve. The bottom of the measuring cylinder is provided with a joint connected to the inner cavity of the measuring cylinder, one interface of the solenoid valve is connected to the joint, and the other interface of the solenoid valve is connected to a hose; The waste liquid recovery cylinder is movably placed in the box, and one end of the hose away from the solenoid valve is movably placed in the waste liquid recovery cylinder; The small vacuum pump is arranged in the box body and is provided with a suction pipe, one end of which is connected to the suction port of the small vacuum pump, and the other end of which passes through the box body and the sealing cover and extends to the upper part of the inner cavity of the measuring cylinder; The lifting device comprises a lifting ring, a connecting rod, a nut, a screw, a knob and a scale positioning member; the lifting ring is movably sleeved on the outer circumference of the measuring cylinder, the lifting ring is horizontally arranged, and its inner diameter matches the outer diameter of the measuring cylinder; one side of the lifting ring is fixedly connected to the nut through the connecting rod; the screw is vertically arranged and threadedly connected to the nut, the bottom of the screw is rotatably connected to the top surface of the box, and the knob is arranged on the top of the screw; the scale positioning member is arranged on the top surface of the lifting ring, and comprises a positioning rod and a support rod, the positioning rod is horizontally arranged and fixedly connected to the lifting ring through the support rod; The control system includes a control module, a power supply module, a photoelectric sensor, a first relay and a second relay; the control module, the power supply module, the first relay and the second relay are all arranged in the box, the photoelectric sensor is arranged on the top surface of the lifting ring, its sensing part faces the measuring cylinder, and the center of the sensing part of the photoelectric sensor is at the same horizontal height as the positioning rod; the power supply module, the photoelectric sensor, the first relay and the second relay are all electrically connected to the control module; the power supply module is electrically connected to the first relay, and the first relay is electrically connected to the small vacuum pump; the power supply module is electrically connected to the second relay, and the second relay is electrically connected to the solenoid valve; When the liquid level in the measuring cylinder is at the same height as the center of the sensing part of the photoelectric sensor, the photoelectric sensor generates a feedback signal and sends it to the control module, the control module controls the first relay to operate, the power supply module is disconnected from the small vacuum pump, and the small vacuum pump is powered off and stops working; at the same time, the control module controls the second relay to operate, the power supply module is connected to the solenoid valve, the solenoid valve is powered on, and the liquid in the measuring cylinder flows into the waste liquid recovery cylinder; A tray is arranged on the top surface of the box body at one side of the measuring cylinder, a support frame for hanging a physiological saline bottle upside down is arranged in the middle of the tray, and a hook is arranged on the upper part of the support frame; The control system further comprises an alarm module, and the alarm module is electrically connected to the control module.

2. A quantitative liquid discharger according to claim 1, characterized in that: One side of the box door is hinged to the box body through a hinge, and a visual window for observing the liquid level in the waste liquid recovery cylinder is arranged in the middle of the box door.

3. A quantitative liquid discharger according to claim 1, characterized in that: A threaded hole is provided on the top surface of the box body, the threaded hole is connected to the inner cavity of the box body, and the lower end of the measuring cylinder is threadedly connected to the threaded hole.

4. A quantitative liquid discharger according to claim 1, characterized in that: The inner diameter of the measuring cylinder is 4 cm, and the range of the capacity scale is 30-200 mL.

5. A quantitative liquid discharger according to claim 4, characterized in that: The inner diameter of the liquid extraction tube is 0.15-0.25 cm, and the length is 20-30 cm.

6. A quantitative liquid discharger according to claim 1, characterized in that: The positioning rod is located above the lifting ring and close to one side of the inner ring surface.

7. A quantitative liquid discharger according to claim 1, characterized in that: The photoelectric sensor is a through-beam photoelectric sensor.

8. A quantitative liquid discharger according to claim 1, characterized in that: The control module is a single chip microcomputer module, the power supply module is a lithium ion battery module, a charging port is provided on one side of the box, the charging port is electrically connected to the lithium ion battery module, and the alarm module is a buzzer.

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