Anti-backflow and self-flushing pump valve device

Abstract

The utility model relates to the technical field of chemical analyzers, in particular to an anti-backflow and self-flushing pump valve device, the device has two working modes of liquid pumping and flushing, in the flushing mode, a second electromagnetic valve is opened, a first electromagnetic valve is closed, a liquid pump is excited to act, excitation liquid is pumped out of an excitation liquid bottle and enters a valve seat through a liquid inlet pipe and a liquid inlet, and the valve seat is opened; at the moment, the second electromagnetic valve is opened, the excitation liquid flows into the waste liquid bottle through the liquid outlet and the liquid outlet pipe, and pipeline flushing is achieved. On the anti-backflow function, by arranging the first electromagnetic valve, a liquid path can be effectively cut off, excitation liquid is prevented from flowing back to the excitation liquid bottle, air in the pipeline caused by backflow is avoided, then it is guaranteed that liquid injection can be conducted smoothly every time, the detection efficiency is improved, and the accuracy of the detection result is guaranteed. Liquid in the pipeline can be quickly discharged into a waste liquid bottle by arranging a second electromagnetic valve, so that new excitation liquid or other types of liquid can be conveniently replaced, and the device can better adapt to different test requirements and working scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical analysis appearance technical field especially, relates to a pump valve device of backflow prevention and self -cleaning. BACKGROUND

[0002] In the field of modern medical examination, chemiluminescence analysis system occupies an important position, it is under the catalysis of catalyst and the oxidation of oxidant, form the excited state intermediate with the help of chemiluminescence substance. When the intermediate returns to stable ground state from excited state, will emit photon (hM) to the outside, and then through the professional luminescence signal measuring instrument to the light quantum yield accurate measurement. The fully automatic chemiluminescence immunoassay analyzer based on this principle is increasingly becoming the key equipment of clinical diagnosis, and whether the liquid quantity of excitation liquid is stable, is directly related to clinical medical efficiency, so ensure that excitation liquid is stable, accurate supply, is the core point of guaranteeing the efficient operation of analyzer.

[0003] However, the current fully automatic chemiluminescence immunoassay analyzer faces the problems of excitation liquid backflow and flushing in the actual application. As for the excitation liquid backflow, when the device does not perform sample test task for a period of time, the excitation liquid will flow back to the excitation liquid bottle from the liquid inlet to the pipe of the excitation liquid bottle. Because the waiting time is different, the amount of backflow excitation liquid is difficult to determine, which makes it easy to leave a segment of air in the pipe. When subsequent testing is urgently needed and excitation liquid is punched, it may appear that multiple liquid punching cannot successfully output liquid, thereby seriously interfering with the accuracy of the test result, greatly reducing the detection efficiency, and causing the entire test process to be forced to interrupt. In the flushing link, when a new excitation liquid type needs to be replaced, the original liquid in the pipe needs to be emptied, and if the flushing is not thorough, the residual liquid will contaminate the newly replaced excitation liquid, which will also negatively affect the reliability of the test result. SUMMARY

[0004] To solve the above problems, the present application provides a pump valve device for preventing backflow and self-flushing, comprising: an excitation liquid bottle, a waste liquid bottle, an excitation liquid pump, a valve seat, the valve seat is provided with a liquid inlet, a liquid outlet and a liquid punching port; the liquid inlet is communicated with the excitation liquid bottle through a liquid inlet pipe, the liquid outlet is communicated with the waste liquid bottle through a liquid outlet pipe, the liquid punching port is communicated with a measuring chamber, the excitation liquid pump is arranged on the liquid inlet pipe, the valve seat is provided with a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve controls the liquid path between the liquid inlet and the liquid punching port, and the second electromagnetic valve controls the liquid path between the liquid inlet and the liquid outlet.

[0005] In one embodiment, a control unit is further provided, which is electrically connected with the excitation liquid pump, the first electromagnetic valve and the second electromagnetic valve, and controls the liquid path switching according to a detection instruction, and the control unit is configured to: in a detection mode, open the first electromagnetic valve and start the excitation liquid pump to inject excitation liquid into the reaction cup; and in a flushing mode, close the first electromagnetic valve, open the second electromagnetic valve and start the excitation liquid pump to discharge the pipeline liquid into the waste liquid bottle.

[0006] In one embodiment, the liquid inlet pipe and the liquid outlet pipe are made of a corrosion-resistant elastic material.

[0007] In one embodiment, a liquid level sensor is arranged in the excitation liquid bottle, and the liquid level sensor is connected with the control unit to trigger an alarm signal when the liquid level reaches a threshold value.

[0008] In one embodiment, the liquid level sensor is a capacitive liquid level meter.

[0009] In one embodiment, the valve seat is fixedly installed on the measuring chamber through a bolt assembly.

[0010] The beneficial effects of the utility model lie in:

[0011] The pump valve device provided by the application has two working modes of liquid injection and flushing, in the flushing mode, the second electromagnetic valve is opened, the first electromagnetic valve is closed, the excitation liquid pump is actuated to draw excitation liquid from the excitation liquid bottle, the excitation liquid enters the valve seat through the liquid inlet pipe and the liquid inlet, at this time, the excitation liquid flows into the waste liquid bottle through the liquid outlet and the liquid outlet pipe due to the opening of the second electromagnetic valve, and pipeline flushing is realized. By arranging the first electromagnetic valve and the second electromagnetic valve, the liquid paths during liquid injection and flushing are clearly divided, the liquid flow direction to the reaction cup or the waste liquid bottle is accurately ensured, and the accuracy and reliability of operation are improved. In terms of anti-backflow function, by arranging the first electromagnetic valve, the liquid path can be effectively cut off to prevent the excitation liquid from flowing back to the excitation liquid bottle, air in the pipeline caused by backflow is avoided, thus ensuring that liquid injection can be smoothly performed each time, improving detection efficiency and ensuring the accuracy of detection results. In terms of flushing, by arranging the second electromagnetic valve, liquid in the pipeline can be quickly discharged into the waste liquid bottle, new excitation liquid or other types of liquid can be replaced, different liquids are prevented from interfering with each other, the flexibility and convenience of device use are enhanced, and the device can better adapt to different testing requirements and working scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a valve seat structure schematic diagram Figure 1 ;

[0014] Figure 3 schematic diagram of valve seat structure Figure 2 ;

[0015] Explanation of symbols in the figure:

[0016] 1, excitation liquid bottle; 2, waste liquid bottle; 3, excitation liquid pump;

[0017] 4, valve seat; 41, liquid inlet; 42, liquid outlet; 43, liquid tapping port; 44, first electromagnetic valve; 45, second electromagnetic valve;

[0018] 5, liquid inlet pipe;

[0019] 6, liquid outlet pipe;

[0020] 7, measuring chamber. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0022] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0023] As shown in Figures 1-3 , a backflow prevention and self-flushing pump valve device, comprising: an excitation liquid bottle 1, a waste liquid bottle 2, an excitation liquid pump 3, a valve seat 4, the valve seat 4 is provided with a liquid inlet 41, a liquid outlet 42 and a liquid tapping port 43; the liquid inlet 41 is communicated with the excitation liquid bottle 1 through a liquid inlet pipe 5, the liquid outlet 42 is communicated with the waste liquid bottle 2 through a liquid outlet pipe 6, the liquid tapping port 43 is communicated with a measuring chamber 7, the excitation liquid pump 3 is arranged on the liquid inlet pipe 5, the valve seat 4 is provided with a first electromagnetic valve 44 and a second electromagnetic valve 45, the first electromagnetic valve 44 controls the liquid path between the liquid inlet 41 and the liquid tapping port 43, and the second electromagnetic valve 45 controls the liquid path between the liquid inlet 41 and the liquid outlet 42.

[0024] Specifically, the excitation liquid bottle 1 serves as a storage place of the excitation liquid, and communicates with the liquid inlet 41 on the valve seat 4 through the liquid inlet pipe 5 to provide a channel for the excitation liquid to flow into the valve seat 4. The excitation liquid pump 3 is installed on the liquid inlet pipe 5 to provide power for the delivery of the excitation liquid. The excitation liquid pump 3 is a fixed displacement plunger pump, and the liquid volume can be manually adjusted. The liquid outlet 42 is connected with the waste liquid bottle 2 through the liquid outlet pipe 6, and is used for discharging the flushing liquid into the waste liquid bottle 2. The liquid outlet 43 is connected with the measuring chamber 7, and is a channel for the excitation liquid to enter the reaction cup. The valve seat is fixedly installed on the measuring chamber 7 through a bolt assembly. On the valve seat 4, the first electromagnetic valve 44 is arranged on the liquid path between the liquid inlet 41 and the liquid outlet 43, and the second electromagnetic valve 45 is arranged on the liquid path between the liquid inlet 41 and the liquid outlet 42. They respectively control the opening and closing of the corresponding liquid path. The device has two working modes of liquid injection and flushing. In the liquid injection mode, the first electromagnetic valve 44 is opened, the second electromagnetic valve 45 is closed, and the excitation liquid pump 3 is started to draw the excitation liquid from the excitation liquid bottle 1. The excitation liquid sequentially passes through the liquid inlet pipe 5, the liquid inlet 41, enters the valve seat 4, and then flows into the reaction cup of the measuring chamber 7 through the liquid outlet 43 to complete the liquid injection operation. After the liquid injection is completed, the first electromagnetic valve 44 is closed to cut off the liquid path between the excitation liquid pump 3 and the liquid inlet 41, and to block the path of the liquid flowing back from the valve seat 4 to the excitation liquid bottle 1. In the flushing mode, the second electromagnetic valve 45 is opened, the first electromagnetic valve 44 is closed, and the excitation liquid pump 3 is actuated to draw the excitation liquid from the excitation liquid bottle 1. The excitation liquid enters the valve seat 4 through the liquid inlet pipe 5 and the liquid inlet 41. At this time, because the second electromagnetic valve 45 is opened, the excitation liquid flows into the waste liquid bottle 2 through the liquid outlet 42 and the liquid outlet pipe 6 to realize the pipeline flushing. By arranging the first electromagnetic valve 44 and the second electromagnetic valve 45, the liquid paths in the liquid injection and flushing modes are clearly divided, the liquid flow direction to the reaction cup or the waste liquid bottle 2 is accurately ensured, and the accuracy and reliability of the operation are improved. In the anti-backflow function, by arranging the first electromagnetic valve 44, the liquid path can be effectively cut off to prevent the excitation liquid from flowing back to the excitation liquid bottle 1, to avoid the air in the pipeline caused by backflow, and to ensure that the liquid injection can be smoothly performed every time, to improve the detection efficiency and to ensure the accuracy of the detection result. In the flushing aspect, by arranging the second electromagnetic valve 45, the liquid in the pipeline can be quickly discharged into the waste liquid bottle 2, the new excitation liquid or other types of liquid can be easily replaced, the interference between different liquids is prevented, and the flexibility and convenience of the use of the device are enhanced.

[0025] As shown in Figure 1 , 2 , a control unit is further arranged, and the control unit is electrically connected with the excitation liquid pump 3, the first electromagnetic valve 44 and the second electromagnetic valve 45, and controls the liquid path switching according to a detection instruction. The control unit is configured to: in the detection mode, open the first electromagnetic valve 44 and start the excitation liquid pump 3 to inject the excitation liquid into the reaction cup; and in the flushing mode, close the first electromagnetic valve 44, open the second electromagnetic valve 45 and start the excitation liquid pump 3 to discharge the liquid in the pipeline into the waste liquid bottle 2.

[0026] Specifically, the control unit can automatically switch the liquid circuit according to the detection instruction, without manually operating the electromagnetic valve and the excitation liquid pump 3. In the detection mode, the instruction of opening the first electromagnetic valve 44 and starting the excitation liquid pump 3 is executed, ensuring that the excitation liquid is injected into the reaction cup, reducing the manual operation error, and greatly improving the accuracy and repeatability of the detection process. In the flushing mode, the first electromagnetic valve 44 is closed according to the instruction, the second electromagnetic valve 45 is opened, and the excitation liquid pump 3 is started, so that the pipeline liquid is discharged into the waste liquid bottle 2, improving the overall work efficiency.

[0027] As shown in Figure 1 , the liquid inlet pipe 5 and the liquid outlet pipe 6 are made of elastic corrosion-resistant materials.

[0028] Specifically, the elastic corrosion-resistant material can reduce the failure rate caused by mechanical stress and chemical corrosion, reduce the maintenance workload and cost, make the equipment maintenance simpler and more convenient, and improve the use efficiency and economic benefit of the equipment.

[0029] As shown in Figure 1 , the excitation liquid bottle 1 is provided with a liquid level sensor, and the liquid level sensor is connected with the control unit, and an alarm signal is triggered when the liquid level reaches a threshold value.

[0030] Specifically, the liquid level sensor is a capacitive liquid level meter, which can monitor the liquid level in the excitation liquid bottle 1 in real time, and once the liquid level approaches the threshold value, an alarm signal will be sent in time to remind the staff to handle it in time.

[0031] The application discloses a backflow prevention and self-flushing pump valve device, which comprises an excitation liquid bottle 1, a waste liquid bottle 2, an excitation liquid pump 3, a valve seat 4, wherein the valve seat 4 is provided with a liquid inlet 41, a liquid outlet 42 and a liquid hitting port 43; the liquid inlet 41 is communicated with the excitation liquid bottle 1 through a liquid inlet pipe 5, the liquid outlet 42 is communicated with the waste liquid bottle 2 through a liquid outlet pipe 6, the liquid hitting port 43 is communicated with a measuring chamber 7, the excitation liquid pump 3 is arranged on the liquid inlet pipe 5, the valve seat 4 is provided with a first electromagnetic valve 44 and a second electromagnetic valve 45, the first electromagnetic valve 44 controls a liquid path between the liquid inlet 41 and the liquid hitting port 43, and the second electromagnetic valve 45 controls a liquid path between the liquid inlet 41 and the liquid outlet 42. The device has two working modes of liquid hitting and flushing, in the liquid hitting mode, the first electromagnetic valve 44 is opened, the second electromagnetic valve 45 is closed, the excitation liquid pump 3 is started to draw excitation liquid from the excitation liquid bottle 1, the excitation liquid sequentially passes through the liquid inlet pipe 5 and the liquid inlet 41 to enter the valve seat 4, and then flows into a reaction cup in the measuring chamber 7 through the liquid hitting port 43 to complete the liquid hitting operation, after the liquid hitting is completed, the first electromagnetic valve 44 is closed to cut off the liquid path between the excitation liquid pump 3 and the liquid inlet 41, thereby blocking the path of the liquid flowing back to the excitation liquid bottle 1 from the valve seat 4. In the flushing mode, the second electromagnetic valve 45 is opened, the first electromagnetic valve 44 is closed, and the excitation liquid pump 3 is actuated to draw excitation liquid from the excitation liquid bottle 1, which enters the valve seat 4 through the liquid inlet pipe 5 and the liquid inlet 41, at this time, the excitation liquid flows into the waste liquid bottle 2 through the liquid outlet 42 and the liquid outlet pipe 6 due to the opening of the second electromagnetic valve 45, thereby realizing pipeline flushing. By arranging the first electromagnetic valve 44 and the second electromagnetic valve 45, the liquid paths in the liquid hitting and flushing modes are clearly divided, the liquid flow direction to the reaction cup or the waste liquid bottle 2 is accurately ensured, and the operation accuracy and reliability are improved. In the backflow prevention function, the first electromagnetic valve 44 is arranged to effectively cut off the liquid path, prevent the excitation liquid from flowing back to the excitation liquid bottle 1, avoid the appearance of air in the pipeline due to backflow, thereby ensuring that the liquid hitting can be smoothly performed every time, improving the detection efficiency and ensuring the accuracy of the detection result. In the flushing aspect, the second electromagnetic valve 45 is arranged to rapidly discharge the liquid in the pipeline into the waste liquid bottle 2, facilitate replacement of new excitation liquid or other types of liquid, prevent different liquids from interfering with each other, and enhance the flexibility and convenience of the device use.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

[0033] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Also can be direct connection, also can be indirectly connected through intermediate medium, can be the communication of two elements inside.For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

Claims

1. A pump valve device for preventing backflow and self-flushing, comprising: The device comprises an activating liquid bottle (1), a waste liquid bottle (2), an activating liquid pump (3), and a valve seat (4). The valve seat (4) is provided with an inlet (41), a outlet (42), and a pumping port (43). The inlet (41) is connected to the activating liquid bottle (1) through an inlet pipe (5). The outlet (42) is connected to the waste liquid bottle (2) through an outlet pipe (6). The pumping port (43) is connected to the measuring chamber (7). The activating liquid pump (3) is mounted on the inlet pipe (5). The device is characterized in that the valve seat (4) is provided with a first solenoid valve (44) and a second solenoid valve (45). The first solenoid valve (44) controls the liquid path between the inlet (41) and the pumping port (43). The second solenoid valve (45) controls the liquid path between the inlet (41) and the outlet (42).

2. The anti-backflow and self-flushing pump valve device according to claim 1, characterized in that, A control unit is also provided, which is electrically connected to the excitation liquid pump (3), the first solenoid valve (44), and the second solenoid valve (45). The control unit controls the liquid circuit switching according to the detection command. The control unit is configured to: in the detection mode, open the first solenoid valve (44) and start the excitation liquid pump (3) to inject the excitation liquid into the reaction cup; in the rinsing mode, close the first solenoid valve (44), open the second solenoid valve (45) and start the excitation liquid pump (3) to discharge the pipeline liquid into the waste liquid bottle (2).

3. The anti-backflow and self-flushing pump valve device according to claim 1, characterized in that, Both the inlet pipe (5) and the outlet pipe (6) are made of elastic, corrosion-resistant materials.

4. The anti-backflow and self-flushing pump valve device according to claim 2, characterized in that, The excitation liquid bottle (1) is equipped with a liquid level sensor, which is connected to the control unit. When the liquid level reaches the threshold, an alarm signal is triggered.

5. The anti-backflow and self-flushing pump valve device according to claim 4, characterized in that, The liquid level sensor is a capacitive liquid level gauge.

6. The anti-backflow and self-flushing pump valve device according to claim 1, characterized in that, The activating liquid pump (3) is a metering plunger pump.

7. The anti-backflow and self-flushing pump valve device according to claim 1, characterized in that, The valve seat (4) is fixedly mounted on the measuring chamber (7) by a bolt assembly.

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