Film scratching instrument

Abstract

The utility model discloses a film scratching instrument, belongs to the field of detection equipment, and is used for solving the problems of how to improve the conveying stability of a marker solution and the continuity of spraying lines. The film scratching instrument comprises a tandem type double-plunger reciprocating pump, a film scratching head and a liquid conveying pipeline. The tandem type double-plunger reciprocating pump is provided with a liquid inlet and a liquid outlet, the liquid inlet is used for inputting a marker solution, the liquid outlet is used for outputting the marker solution, the film scratching head is provided with a spray head, and the spray head is connected with the liquid outlet through a liquid conveying pipeline and used for spraying the marker solution onto test paper. Due to the fact that the tandem type double-plunger reciprocating pump can provide stable pressure and flow, compared with a traditional manual spraying pump or a single-plunger pump, a marker solution sprayed to test paper through film scratching is more uniform in distribution, the continuity of spraying lines is better, and the stability of spraying quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of detection equipment, in particular to a membrane drawing instrument. BACKGROUND

[0002] The membrane drawing instrument, such as a colloidal gold membrane drawing instrument or a membrane drawing and spraying instrument in the field of lateral chromatographic test strips, can spray a marker solution forming a detection line and a quality control line onto a chromatographic membrane medium. The working principle of the membrane drawing instrument mainly depends on the driving of a pump. During the spraying process, the marker solution is pushed out by the pump and sprayed onto the test strip through the nozzle of the membrane drawing head. In order to reduce the cost, the existing membrane drawing instrument usually uses two plunger pumps to drive the delivery of the marker solution to the membrane drawing head alternately. Although this design can achieve the delivery of the marker solution, it has the following defects: when the two plunger pumps work alternately, the stability of the driving of the marker solution delivery is poor, and intermittent lines are easily formed on the test strip, which affects the normal detection work.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem to be solved

[0005] The embodiment of the present application provides a membrane drawing instrument, which can solve the problem of how to improve the stability of the delivery of the marker solution and the continuity of the sprayed lines in the prior art.

[0006] (II) Technical scheme

[0007] To solve the above technical problems, the present application provides the following technical scheme:

[0008] A membrane drawing instrument is provided, which comprises a tandem double-plunger reciprocating pump, a membrane drawing head and a liquid delivery pipeline.

[0009] The tandem double-plunger reciprocating pump has a liquid inlet and a liquid outlet, the liquid inlet is used for inputting a marker solution, and the liquid outlet is used for outputting the marker solution.

[0010] The membrane drawing head has a spray head, which is connected with the liquid outlet through the liquid delivery pipeline and is used for spraying the marker solution onto a test strip.

[0011] In some embodiments, the tandem double-plunger reciprocating pump has two plunger flushing ports with switching function and mutual communication, which are arranged towards the plungers inside the tandem double-plunger reciprocating pump; one of the plunger flushing ports is used for delivering cleaning water to the plungers to clean the plungers, and the other plunger flushing port is used for outputting the cleaning water.

[0012] In some embodiments, the two plunger flushing ports are communicated through a connecting pipe, which is located outside the tandem double-plunger reciprocating pump and detachably connected with the plunger flushing ports.

[0013] In some embodiments, the membrane marking instrument further comprises an exhaust valve, which is connected with the liquid outlet through a pipeline and has a flow outlet connected with the infusion pipeline.

[0014] In some embodiments, the exhaust valve has a waste liquid outlet for discharging waste liquid and gas inside the exhaust valve and a knob for switching a flow channel inside the exhaust valve to the waste liquid outlet or the flow outlet, the flow channel being used for conveying the marker solution.

[0015] In some embodiments, the membrane marking instrument further comprises a waste liquid bottle connected with the waste liquid outlet through a pipeline.

[0016] In some embodiments, the membrane marking instrument further comprises a control button for controlling the operation of the tandem double-plunger reciprocating pump.

[0017] In some embodiments, the membrane marking instrument further comprises a display screen for displaying the operation parameters of the tandem double-plunger reciprocating pump.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the technical scheme provided by the embodiments of the present application brings at least the following beneficial effects:

[0020] When the membrane marking instrument of the present application is in operation, first, the marker solution is input into the pump through the liquid inlet of the tandem double-plunger reciprocating pump; then, the tandem double-plunger reciprocating pump starts to work, and the input marker solution is pumped from the liquid inlet to the liquid outlet through the reciprocating movement of the plunger inside the pump; subsequently, after the marker solution flows out of the liquid outlet of the tandem double-plunger reciprocating pump, it is conveyed to the nozzle of the membrane marking head through the infusion pipeline, and the nozzle sprays the marker solution onto the test paper. Since the tandem double-plunger reciprocating pump can provide stable and continuous output of the marker solution, the spraying efficiency is improved; at the same time, since the tandem double-plunger reciprocating pump can provide stable pressure and flow, compared with the traditional manual spraying or single-plunger pump, the distribution of the marker solution sprayed onto the test paper is more uniform, the continuity of the sprayed lines is better, and the stability of the spraying quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0022] Figure 1 This is a schematic diagram of the film-drawing device in the embodiments of this application.

[0023] 1. Series-type double plunger reciprocating pump; 2. Film cutting head; 3. Infusion pipeline; 4. Exhaust valve; 5. Control button; 6. Display screen; 11. Inlet; 12. Outlet; 13. Plunger flushing port; 14. Connecting pipe; 20. Nozzle; 41. Outlet; 42. Waste liquid port; 43. Knob; 44. Waste liquid bottle.

[0024] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Existing scrubbing instruments typically use two plunger pumps that work alternately to drive the labeled solution to the scrubbing head. While this design can achieve the delivery of the labeled solution, it has the following drawbacks: when the two plunger pumps work alternately, the stability of the labeled solution delivery is poor, and it is easy to form discontinuous lines on the test strip, which affects the normal detection work.

[0028] To solve the above technical problems, please refer to Figure 1 As shown, this embodiment provides a film-drawing device including: a series-connected dual-plunger reciprocating pump 1, a film-drawing head 2, and an infusion pipeline 3.

[0029] The series-type double plunger reciprocating pump 1 has an inlet 11 and an outlet 12. The inlet 11 is used to input the label solution, and the outlet 12 is used to output the label solution.

[0030] The membrane marking head 2 has a spray head 20 connected with the liquid outlet 12 through the infusion pipeline 3, which is used to spray the marker solution onto the test paper.

[0031] The series double-plunger reciprocating pump 1 can be a double-plunger constant flow pump, a series double-plunger reciprocating pump 1 or a high-pressure constant flow infusion pump. The infusion pipeline 3, which is used as a bridge connecting the series double-plunger reciprocating pump 1 and the membrane marking head 2, can be made of high-pressure-resistant and corrosion-resistant materials to ensure that the marker solution is not contaminated and the pressure is stable during transportation. The structure and principle of the membrane marking head 2 for spraying the marker solution can use the technology of the existing membrane marking instrument, which is not described here as it is not the improvement of the present application.

[0032] When the above technical solution works, first, the marker solution is input into the pump through the liquid inlet 11 of the series double-plunger reciprocating pump 1; then, the series double-plunger reciprocating pump 1 starts to work, and the input marker solution is pumped from the liquid inlet 11 to the liquid outlet 12 through the reciprocating movement of the plunger inside; subsequently, after the marker solution flows out of the liquid outlet 12 of the series double-plunger reciprocating pump 1, it is transported to the spray head 20 of the membrane marking head 2 through the infusion pipeline 3, and the spray head 20 sprays the marker solution onto the test paper. Since the series double-plunger reciprocating pump 1 can provide stable and continuous output of the marker solution, the spraying efficiency is improved; at the same time, since the series double-plunger reciprocating pump 1 can provide stable pressure and flow, compared with traditional manual spraying or single-plunger pumps, the marker solution sprayed onto the test paper is more evenly distributed, the continuity of the sprayed lines is better, and the stability of the spraying quality is improved.

[0033] The embodiment further increases the plunger cleaning function of the series double-plunger reciprocating pump 1 based on the above technical solution: the series double-plunger reciprocating pump 1 has two plunger flushing ports 13 with switching function, which are arranged towards the plungers inside the series double-plunger reciprocating pump 1; one of the plunger flushing ports 13 is used to transport cleaning water to the plunger to clean it, and the other plunger flushing port 13 is used to output the cleaning water. The cleaning water can be supplied by an external water source (such as secondary water, tap water and pure water, etc.) and the flow and pressure can be accurately controlled through a pipeline system.

[0034] For example, the switching function of the above-mentioned plunger flushing port 13 is realized through a connecting pipe. Specifically, the two plunger flushing ports 13 are connected through a connecting pipe 14, which is located outside the series double-plunger reciprocating pump and is detachably connected with the plunger flushing port, such as through a threaded joint. When cleaning the plunger, a syringe is used to suck secondary water and inject it into one of the plunger flushing ports 13 through the connecting pipe 14, and the injection liquid flows out of the other plunger flushing port 13 which is internally connected.

[0035] For example, the output of the other plunger flushing port 13 can be connected to a waste water collection device (not shown in the figure) to uniformly treat the waste water generated during the cleaning process.

[0036] To solve the problem of bubbles that may be generated during the delivery of the marker solution, and to discharge excess waste liquid, ensure the stability and uniformity of the spraying effect, the film marker also includes an exhaust valve 4. The exhaust valve 4 is connected to the liquid outlet 12 through a pipeline, and has a flow outlet 41 connected to the infusion pipeline 3. That is, the exhaust valve 4 is connected to the liquid outlet 12 of the tandem double-plunger reciprocating pump 1 through a pipeline, and at the same time, the exhaust valve 4 also has a flow outlet 41 connected to the infusion pipeline 3. In this way, after the marker solution is output from the tandem double-plunger reciprocating pump 1, it will first pass through the exhaust valve 4 to exhaust, and then enter the infusion pipeline 3, and finally reach the film head 2 for spraying.

[0037] Further, the exhaust valve 4 has a waste liquid outlet 42 and a knob 43, the waste liquid outlet 42 is used to discharge the waste liquid and gas in the exhaust valve 4, and the knob 43 is used to switch the flow channel in the exhaust valve 4 to the waste liquid outlet 42 or the flow outlet 41, the flow channel is used to deliver the marker solution, and an existing adjusting knob with a waterway switching function can be used. When the knob 43 is in a certain position, the flow channel is connected to the waste liquid outlet 42, at this time the exhaust valve 4 is in the state of exhausting and discharging waste liquid; when the knob 43 is rotated to another position, the flow channel is connected to the flow outlet 41, at this time the marker solution can continue to flow to the infusion pipeline 3. Before the film marker starts to work, the knob 43 can be rotated to the waste liquid outlet 42 position first, and a period of exhaust and waste liquid discharge operation is performed to ensure that the bubbles and waste liquid in the exhaust valve 4 and the infusion pipeline 3 are completely discharged; then, the knob 43 is rotated to the flow outlet 41 position, so that the marker solution normally flows to the infusion pipeline 3 for spraying. When the film marker is working, the marker solution flows out of the liquid outlet 12 of the tandem double-plunger reciprocating pump 1, first enters the exhaust valve 4; in the exhaust valve 4, the bubbles and waste liquid in the solution are separated out, the bubbles and waste liquid are discharged through the waste liquid outlet 42, and the pure marker solution continues to flow to the infusion pipeline 3 through the flow channel adjusted by the knob 43, and finally reaches the film head 2 for spraying.

[0038] To facilitate waste liquid collection, the film marker also includes a waste liquid bottle 44, which is connected to the waste liquid outlet 42 through a pipeline, so that the waste liquid outlet 42 can deliver the waste liquid to the waste liquid bottle 44 through a pipeline, and after the waste liquid bottle 44 collects a certain amount of waste liquid, it is concentrated for treatment, which can reduce the number of waste liquid treatment and improve work efficiency.

[0039] To facilitate more precise control over the operation of the tandem double-piston reciprocating pump 1, the film drawing instrument also includes a control button 5 for controlling the operation of the tandem double-piston reciprocating pump 1. The control button 5 is usually located on the operating panel of the film drawing instrument, and the operator can start, stop or adjust the operating parameters of the tandem double-piston reciprocating pump 1, such as the speed of the pump, the output pressure, etc., by pressing or rotating the control button 5. During operation, the operator can control the operation of the tandem double-piston reciprocating pump 1 as needed by pressing or rotating the control button 5. For example, when starting the spraying operation, the start button can be pressed; when stopping the spraying operation, the stop button can be pressed; when adjusting the speed of the pump or the output pressure, the adjustment button can be rotated.

[0040] To enable the operator to real-time understand the working state of the tandem double-piston reciprocating pump 1, the film drawing instrument also includes a display screen 6 for displaying the operating parameters of the tandem double-piston reciprocating pump 1. The operating parameters usually include the speed, output pressure, flow rate, etc. of the tandem double-piston reciprocating pump 1. These parameters can be displayed through a digital display screen 6 or an indicator light, etc. During operation, the operator can understand the working state of the tandem double-piston reciprocating pump 1 by observing the display screen 6. For example, during the spraying operation, the display values of the speed and output pressure can be observed to determine whether the pump is working normally; when adjusting the operating parameters of the pump, the display value of the flow rate can be observed to determine whether the adjustment is in place.

[0041] For example, the tandem double-piston reciprocating pump 1 is composed of two independent piston chambers connected in series, each chamber is equipped with a piston, and the reciprocating motion is achieved through the driving of the motor, so as to suck and discharge the solution; a high-precision pressure sensor is installed on the outlet end of the tandem double-piston reciprocating pump 1 or the conveying pipeline connected thereto. The sensor can real-time monitor the pressure value at the outlet of the pump, ensure the stability of the pressure of the solution during conveying, and avoid problems such as uneven spraying or solution leakage caused by pressure fluctuation. Similarly, a flow rate sensor is also installed on the conveying pipeline near the outlet of the pump. The sensor accurately calculates the flow rate of the solution by measuring the volume of the solution passing through the cross section of the pipeline per unit time. This helps to achieve precise control over the spraying speed, ensuring the consistency and stability of the spraying quality.

[0042] The above is only an optional embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A membrane striper, characterized by, The application relates to a membrane drawing instrument. The membrane drawing instrument comprises a series double-plunger reciprocating pump, a membrane drawing head and a liquid conveying pipeline. The series double-plunger reciprocating pump has a liquid inlet and a liquid outlet, the liquid inlet is used for inputting a marker solution, and the liquid outlet is used for outputting the marker solution. The membrane drawing head has a nozzle connected with the liquid outlet through the liquid conveying pipeline and used for spraying the marker solution on test paper.

2. The membrane marker according to claim 1, wherein The series double-plunger reciprocating pump has two plunger flushing ports with switching functions and connected with each other, the plunger flushing ports are arranged towards plungers in the series double-plunger reciprocating pump, one of the plunger flushing ports is used for conveying cleaning water to the plungers to clean the plungers, and the other plunger flushing port is used for outputting the cleaning water.

3. The membrane marker according to claim 2, wherein The two plunger flushing ports are connected through a connecting pipe, the connecting pipe is arranged outside the series double-plunger reciprocating pump and detachably connected with the plunger flushing ports.

4. The membrane marker of claim 1, wherein, The membrane drawing instrument further comprises an exhaust valve connected with the liquid outlet through a pipeline and having a flow outlet connected with the liquid conveying pipeline.

5. The membrane marker of claim 4, wherein, The exhaust valve has a waste liquid outlet used for discharging waste liquid and gas in the exhaust valve and a knob used for switching a flow channel in the exhaust valve to the waste liquid outlet or the flow outlet, and the flow channel is used for conveying the marker solution.

6. The membrane marker of claim 5, wherein, The membrane drawing instrument further comprises a waste liquid bottle connected with the waste liquid outlet through a pipeline.

7. The membrane marker of claim 1, wherein, The membrane drawing instrument further comprises a control button used for controlling the series double-plunger reciprocating pump.

8. The membrane marker of claim 1, wherein, The membrane drawing instrument further comprises a display screen used for displaying working parameters of the series double-plunger reciprocating pump.

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