External testing tool for liquid phase proportional valve

Abstract

The utility model belongs to the technical field of valve testing, and particularly relates to an external testing tool for a liquid phase proportional valve. Comprising a fluid channel through which fluid flows in one direction, one end of the fluid channel is detachably connected with any inlet of the liquid phase proportional valve, and the other end of the fluid channel is connected with a test liquid container; the rotating assembly is arranged in the fluid channel and can be pushed to rotate when the fluid flows; the detection assembly is arranged on the fluid channel and used for detecting the rotating speed of the rotating assembly; the power supply is used for providing electric energy for the electromagnetic valve of the liquid phase proportional valve; one end of the on-off assembly is electrically connected with the power source, the other end of the on-off assembly is electrically connected with the electromagnetic valve, the on-off assembly is used for controlling the liquid phase proportional valve to be opened and closed, and whether opening and closing of the liquid phase proportional valve are normal or not, whether leakage exists or not and whether flow deviation exists or not can be tested.

Description

Technical Field

[0001] This application belongs to the field of valve testing technology, specifically relating to an external testing tool for a liquid phase proportional valve. Background Technology

[0002] The liquid phase proportioning valve is a key component in a liquid chromatography system. It is mainly used to precisely control the proportion of the mobile phase to achieve gradient elution. Among them, the quaternary proportioning valve is particularly typical. It controls the mobile phase of four channels to be mixed in a preset ratio through solenoid valves. Its core lies in the precise adjustment of the opening time and flow rate of each channel.

[0003] However, in practical applications, the rated output of a four-element proportional valve is affected by many factors during operation. For example, whether the opening and closing state is normal, dynamic response delay, or wear can lead to inaccurate control of the channel opening and closing time; wear or deformation of the built-in small spring can cause deviation in valve body action, resulting in incomplete closure or flow fluctuation; or, system leakage or channel blockage can cause the measured flow rate to deviate from the set value.

[0004] Therefore, the quaternary proportional valve needs to be tested during initial use or long-term use to avoid deviations in fluid control that could lead to results that deviate from the correct values. Summary of the Invention

[0005] Based on this, this application provides an external testing tool for liquid phase proportional valves to solve the technical problems in the prior art, such as abnormal opening and closing states, dynamic response delays, channel blockages, and inaccurate flow fluctuations caused by wear or deformation of internal components.

[0006] The technical solution to the above-mentioned technical problems in this application is as follows:

[0007] An external testing tool for a liquid phase proportional valve, which can be connected to any inlet of the liquid phase proportional valve, includes:

[0008] A fluid channel is provided for unidirectional flow of fluid. One end of the fluid channel is detachably connected to any inlet of the liquid phase proportional valve, and the other end is connected to a test liquid container.

[0009] A rotating component, which is disposed in the fluid channel and can be driven to rotate by the fluid during flow;

[0010] A detection component, disposed on the fluid channel, is used to detect the rotational speed of the rotating component;

[0011] A power source for providing electrical energy to the solenoid valve of the liquid phase proportional valve;

[0012] The on / off component has one end electrically connected to the power supply and the other end electrically connected to the solenoid valve for controlling the opening and closing of the liquid phase proportional valve. The other end of the on / off component is also electrically connected to a timer for counting the running time of the solenoid valve.

[0013] Preferably, the axis of rotation of the rotating component is perpendicular to the direction of fluid flow.

[0014] Preferably, the fluid channel comprises two housings that can be interlocked and detachably connected, and the rotating assembly is rotatably connected to the two housings.

[0015] Preferably, the rotating assembly includes a shaft that rotates vertically in two housings, with multiple blades axially arranged on the shaft along its own axis.

[0016] Preferably, the middle side of the housing is formed with a semi-circular side cavity, the rotating shaft coincides with the center of the side cavity, and the distance between the outer end of the blade and the inner wall of the housing is less than 0.5 mm.

[0017] Preferably, the end face of the housing is provided with a sealing gasket for sealing at the point where the two housings interlock.

[0018] Preferably, the outer wall surface at the end of the housing is provided with threads.

[0019] Preferably, the detection assembly includes a mounting ring fixed to the housing and a gear, the gear being fixed to the end of the shaft that extends out of the housing and located in the mounting ring, and a speed sensor located on the side of the gear being disposed on the mounting ring.

[0020] Preferably, the speed sensor is detachably connected to the mounting ring, and an end cap is fastened to the upper end of the mounting ring.

[0021] Preferably, the on / off component is a switch.

[0022] Compared with the prior art, this application has at least the following advantages:

[0023] This application provides an external testing tool for a liquid phase proportional valve. A fluid channel is connected between the liquid phase proportional valve and the pipeline used to supply fluid to the valve. A switching component is then connected to a power source via a wire, and the switching component is further connected to the liquid phase proportional valve via a wire. When the liquid phase proportional valve is opened, the fluid in the pipeline flows through the fluid channel and then into the valve. During this process, as the fluid flows unidirectionally through the fluid channel, it contacts the rotating component, and the force generated by this contact causes the rotating component to rotate. This tool can test whether the liquid phase proportional valve opens and closes normally, whether there is leakage, and whether there is a deviation in flow rate. It can not only perform single-run tests but also test the errors generated by multiple inlets in a multi-element proportional valve under irregular and repeated operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external testing tool for the liquid phase proportional valve in this application;

[0025] Figure 2 This is a schematic diagram of another direction of the external testing tool for the liquid phase proportional valve in this application;

[0026] Figure 3 This is a schematic diagram of the mounting ring structure in this application;

[0027] Figure 4 This is a schematic diagram of the internal structure of the shell of this application;

[0028] Figure 5 This is a schematic diagram of the side cavity structure of this application;

[0029] Figure 6 This is a schematic diagram of the blade structure of this application.

[0030] In the diagram: housing 01; sealing gasket 02; mounting ring 03; speed sensor 04; rotating shaft 05; blade 06; gear 07; end cover 08; thread 09; side cavity 10; timer 11. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0032] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please refer to Figures 1 to 6 In one specific embodiment of this application,

[0035] An external testing tool for a liquid phase proportional valve, which can be connected to any inlet of the liquid phase proportional valve, includes:

[0036] A fluid channel is provided for unidirectional flow of fluid. One end of the fluid channel is detachably connected to any inlet of the liquid phase proportional valve, and the other end is connected to a test liquid container.

[0037] A rotating component, which is disposed in the fluid channel and can be driven to rotate by the fluid during flow;

[0038] A detection component, disposed on the fluid channel, is used to detect the rotational speed of the rotating component;

[0039] A power source for providing electrical energy to the solenoid valve of the liquid phase proportional valve;

[0040] The on / off component has one end electrically connected to the power supply and the other end electrically connected to the solenoid valve for controlling the opening and closing of the liquid phase proportional valve. The other end of the on / off component is also electrically connected to a timer 11 for counting the running time of the solenoid valve.

[0041] Among them, the fluid channel can be a pipe that allows fluid to flow in one direction, or a device that allows fluid to flow in one direction; the rotating component is a device that can be driven to rotate by the fluid and is set in the fluid channel, or a windmill-type facility; the detection component can be a sensor that detects the rotation speed of the rotating component, or a tachometer; the on / off component can be a control switch, or a device that controls the opening and closing of the liquid phase proportional valve.

[0042] Connect the fluid channel between the liquid phase proportional valve and the test liquid container. Then connect the on / off component to the power supply through the wire. Connect the on / off component to the liquid phase proportional valve through the wire. Open the liquid phase proportional valve. At this time, the liquid phase proportional valve is open, allowing the test liquid in the test liquid container to flow through the fluid channel and then enter the liquid phase proportional valve. During this process, when the test liquid flows through the fluid channel in one direction, it will contact the rotating component and use the force generated when in contact to drive the rotating component to rotate.

[0043] Taking a quaternary proportional valve as an example, the detection process described above can be divided into at least three types, but is not limited to these three, as detailed below:

[0044] Label the four inlets of the quaternary proportional valve as A, B, C, and D respectively. Take four external testing tools for the liquid phase proportional valves, and then connect the four fluid channels to the four inlets of the quaternary proportional valve respectively. Connect the other end of the four fluid channels to the four test liquid containers respectively. Connect one end of the four on / off components to the power supply, and the other end to the solenoid valve corresponding to the four inlets. At the same time, the other end of the four on / off components should also be electrically connected to the timer 11 corresponding to the four inlets.

[0045] Procedure 1: First, perform a leak detection for inlet A. Specifically, close the on / off component corresponding to inlet A. At this time, the solenoid valve corresponding to inlet A is not energized, and inlet A is in the closed state. Then, introduce the test liquid from the test liquid container into inlet A through the fluid channel. If the rotating component rotates at this time, it indicates that there is a leak at inlet A. Next, perform a blockage detection. Specifically, open the on / off component corresponding to inlet A. At this time, the solenoid valve corresponding to inlet A is energized, and inlet A is in the open state. Then, introduce the test liquid from the test liquid container into inlet A through the fluid channel. If the rotating component rotates smoothly at this time, it indicates that inlet A starts normally. The same procedure is used to detect other inlets.

[0046] Process Two: For single inlet flow detection, open the on / off component corresponding to inlet A. At this time, the solenoid valve corresponding to inlet A is energized, and timer 11 starts timing simultaneously. Inlet A is in the open state. At the same time, the fluid in the test liquid container is introduced into inlet A through the fluid channel. After a period of testing, close the on / off component, de-energizing and closing the solenoid valve corresponding to inlet A. Obtain the amount of flow from inlet A under the ideal state (no deviation at inlet A) based on the time counted by timer 11 (which can be calculated from the factory parameters, for example: if the rated flow rate is N, then the amount of flow from inlet A should be N * the time counted by timer 11). Then compare it with the actual amount of test liquid flowing out of the test liquid container. If the amount of flow from inlet A is not equal to the actual amount of test liquid flowing out, it indicates that there is a deviation in the flow control of inlet A. If the amount of flow from inlet A is equal to the actual amount of test liquid flowing out, it indicates that the flow control of inlet A is accurate. The same method is used to detect other inlets.

[0047] Step 3: For flow detection under the coordinated operation of multiple inlets, open the on / off component corresponding to inlet A. At this time, the solenoid valve corresponding to inlet A is energized, and timer 11 starts timing simultaneously. Inlet A is in the open state. Simultaneously, the test liquid in the test liquid container is introduced into inlet A through the fluid channel. After a period of testing, close the on / off component, de-energizing and closing the solenoid valve corresponding to inlet A, awaiting the next opening. Simultaneously, timer 11 corresponding to inlet A pauses timing (and resumes timing the next time inlet A opens). Then, open the on / off component corresponding to inlet B. At this time, the solenoid valve corresponding to inlet B is energized, and timer 11 starts timing simultaneously. Inlet B is in the open state. Simultaneously, the test liquid in the test liquid container is introduced into inlet B through the fluid channel. After a period of testing, close the on / off component, de-energizing and closing the solenoid valve corresponding to inlet B, and timer 11 corresponding to inlet B pauses timing. Then, repeat the above operations to measure inlets C and D. In this process, the order, time, and number of times A, B, C, and D are turned on can be arbitrarily selected, and A, B, C, and D can be turned on and off alternately multiple times until the test ends. Finally, the amount of water flowing out of each inlet within the time period counted by the timer 11 corresponding to each inlet is obtained separately and compared with the actual amount of test liquid flowing out of the corresponding test liquid container. If the amount of water flowing out of the inlet is equal to the actual amount of test liquid flowing out of the corresponding test liquid container, it indicates that the inlet controls the flow accurately under the cooperative operation state. If they are not equal, it indicates that there is a deviation in the inlet controls the flow under the cooperative operation state. At the same time, in this process, the opening and closing of the switching components can be controlled manually (such as manual switches), or the four switching components (electric switches) can be electrically connected by using a frequency converter or PLC. The state of the four switching components can be randomly controlled by the frequency converter or PLC to achieve the effect of randomized opening of A, B, C, and D. The four switching components can be controlled to operate at intervals, so that the four switching components control A, B, C, and D to operate alternately, at intervals, and at irregular times.

[0048] Through the above testing process, it is possible to test whether the liquid phase proportional valve can open and close normally, whether there is leakage, and whether there is a deviation in the flow rate. It can not only test a single inlet, but also test multiple inlets in a "multi-element" proportional valve under irregular intervals and repeated operation.

[0049] When the fluid (the test liquid mentioned above) acts on the rotating component, it needs to provide a strong push. If the fluid acts obliquely on the rotating component, the force will be dispersed due to the inclined plane, resulting in a decrease in the magnitude of the force acting on the rotating component and introducing errors. Therefore, in this application:

[0050] The axis of rotation of the rotating component is perpendicular to the direction of fluid flow in the vertical direction.

[0051] In other words, the direction of the unidirectional flow of fluid in the fluid channel is perpendicular to the axis of rotation of the rotating component, which enables the fluid to act perpendicularly on the rotating component, increasing the force exerted by the fluid on the rotating component and enabling the fluid to effectively drive the rotating component to rotate.

[0052] Specifically, an embodiment of the fluid channel in the above process is provided:

[0053] The fluid channel includes two housings 01 that can be interlocked and detachably connected, and the rotating assembly is rotatably connected to the two housings 01;

[0054] The two housings 01 can be fastened together and fixed by bolts or other connectors, so that a fluid flow space is formed inside the two housings 01. Then, the ends of the two housings 01 are respectively connected to the pipeline for conveying fluid and the liquid phase proportional valve, so that the fluid pushes the rotating component in the space when it passes through, so that the rotating component can rotate under the action of the fluid.

[0055] Specifically, an embodiment of the rotating component in the above process is provided:

[0056] The rotating assembly includes a rotating shaft 05 that rotates vertically in two housings 01, and multiple blades 06 are axially arranged on the rotating shaft 05 along its own axis.

[0057] The rotating shaft 05 is vertically rotatably connected to the two housings 01, so that multiple blades 06 are located in the space formed by the two housings 01. When the fluid passes through, the fluid acts on the blades 06 in the direction of fluid flow, pushing the blades 06 so that the blades 06 rotate around the rotating shaft 05 as the rotation center, thereby causing the rotating shaft 05 to rotate together.

[0058] Through the above process, the flow of fluid can be used to drive the rotating component, causing it to rotate and generate a rotational speed. Thus, the operating status of the liquid phase proportional valve can be tested by detecting the rotational speed of the rotating shaft 05 in the rotating component.

[0059] In practical applications, if fluid flows through both sides of the rotating shaft 05, meaning the rotating shaft 05 is within the fluid flow range, the fluid will simultaneously act on the blades 06 on both sides of the rotating shaft 05. Therefore, a difference in the force exerted by the fluid on the two blades 06 is required for the rotating shaft 05 to rotate. This results in the inefficient utilization of the fluid's force.

[0060] In this application, a semi-circular side cavity 10 is formed on the middle side of the housing 01, the center of the rotating shaft 05 coincides with the center of the side cavity 10, and the distance between the outer end of the blade 06 and the inner wall surface of the housing 01 is less than 0.5mm.

[0061] When the fluid flows through the space inside the housing 01, the rotating shaft 05 is located in the side cavity 10 and will not intrude into the area through which the fluid flows. Only a portion of the blades 06 on one side of the rotating shaft 05 are located in the space inside the housing 01, while the remaining blades 06 are located in the side cavity 10. When the fluid flows along the space inside the housing 01, it can directly act on the blades 06 and push them, causing the blades 06 to drive the rotating shaft 05 to rotate. After being pushed, the blades 06 will move into the side cavity 10 due to the rotation of the rotating shaft 05. The blades 06 that were originally located in the side cavity 10 will move into the space inside the housing 01 to receive the push of the fluid, thereby causing the rotating shaft 05 to rotate stably and continuously. The distance between the outer end of the blades 06 and the inner wall of the housing 01 is less than 0.5 mm, which can reduce the amount of fluid flowing through the gap between the two and allow as much fluid as possible to act on the blades 06.

[0062] Through the above process, the amount of offset caused by the fluid acting on the blades 06 on both sides of the rotating shaft 05 can be effectively reduced, so that the force generated by the fluid can be used more on the individual blades 06, thereby improving the utilization rate of the fluid and enabling most of the thrust generated by the fluid to be used to realize the power of the rotating shaft 05 to rotate.

[0063] When the two housings 01 are fastened together, the gap between them poses a potential risk of fluid leakage. Therefore,

[0064] In this application, a sealing gasket 02 is provided on the end face of the housing 01 for sealing at the interlocking point of the two housings 01;

[0065] When the two housings 01 are fastened together, they can compress the sealing gasket 02, causing the sealing gasket 02 to undergo elastic deformation and seal the gap when the two housings 01 are fastened together, thus preventing fluid from leaking out from the gap at the fastening point of the two housings 01.

[0066] Furthermore, in order for the housing 01 to be compatible with the fluid delivery pipe and the liquid phase proportional valve, a structure facilitating connection is required at the end of the housing 01.

[0067] In this application, the outer wall surface of the end of the housing 01 is provided with a thread 09;

[0068] After the two housings 01 are fastened together, the threads 09 on the outer walls of the ends of the two housings 01 can be spliced ​​into a complete "bolt"-like structure, which makes it easy to screw the threaded connector at the end of the fluid conveying pipeline into the ends of the two housings 01. Similarly, the threaded connector at the inlet of the liquid phase proportional valve can be connected to the ends of the two housings 01, thus completing the connection of the external testing tool for the liquid phase proportional valve.

[0069] Specifically, an embodiment of the rotating component in the above process is provided:

[0070] The detection assembly includes a mounting ring 03 fixed on the housing 01 and a gear 07. The gear 07 is fixed to the end of the rotating shaft 05 that extends out of the housing 01 and is located in the mounting ring 03. A speed sensor 04 located on the side of the gear 07 is provided on the mounting ring 03.

[0071] Among them, the speed sensor 04 is an electromagnetic induction type. Its principle is that a gear is installed on the rotating shaft, and an electromagnetic coil is on the outside. When rotating, a square wave voltage is obtained due to the gap between the gear teeth, which detects the rotation state of the rotating shaft 05.

[0072] In use, fluid flows through the two housings 01, exerting a force on the blades 06 to drive the rotating shaft 05 to rotate. The rotating shaft 05 drives the gear 07. When the gear 07 rotates, the teeth on the edge of the gear 07 pass through the speed sensor 04, causing the speed sensor 04 to transmit an electrical signal to the computer or feedback platform (such as a display, instrument, etc.), so that the user can understand and monitor the speed of the rotating shaft 05 in a timely manner.

[0073] Through the above process, the rotational speed and working status (rotating or stopped) of the rotating shaft 05 can be fed back to the operator in a timely manner, so that the operator can detect the flow status of the fluid in the two housings 01 by the rotational speed of the rotating shaft 05, and realize the testing process of the liquid phase proportional valve.

[0074] Furthermore, the speed sensor 04 is detachably connected to the mounting ring 03;

[0075] The detachable connection allows for quick disassembly and installation of the speed sensor 04, flexible replacement of damaged speed sensor 04, and adjustment of the gap between the speed sensor 04 and the teeth on the side of gear 07 to ensure that the speed sensor 04 can accurately receive voltage changes.

[0076] Additionally, an end cap 08 is fastened to the upper end of the mounting ring 03;

[0077] The end cap 08 can be fastened to the upper end of the mounting ring 03, thereby covering and protecting the part between the gear 07 and the speed sensor 04, thus preventing external dust or other impurities from entering and affecting the voltage value generated between the gear 07 and the speed sensor 04, avoiding deviations in the detection data, and improving detection accuracy.

[0078] The on / off component is a switch. The power supply is connected to the switch via a wire, and the wire on the switch is connected to the solenoid valve and the timer 11. The switch controls the opening and closing of the liquid phase proportional valve, and the timer 11 also starts counting when the switch is opened, which can accurately count the actual running time of the liquid phase proportional valve.

[0079] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An external testing tool for a liquid phase proportional valve, which can be externally connected to any inlet of the liquid phase proportional valve, characterized in that, include: A fluid channel is provided for unidirectional flow of fluid. One end of the fluid channel is detachably connected to any inlet of the liquid phase proportional valve, and the other end is connected to a test liquid container. A rotating component, which is disposed in the fluid channel and can be driven to rotate by the fluid during flow; A detection component, disposed on the fluid channel, is used to detect the rotational speed of the rotating component; A power source for providing electrical energy to the solenoid valve of the liquid phase proportional valve; The on / off component has one end electrically connected to the power supply and the other end electrically connected to the solenoid valve for controlling the opening and closing of the liquid phase proportional valve. The other end of the on / off component is also electrically connected to a timer for counting the running time of the solenoid valve.

2. The external testing tool for the liquid phase proportional valve as described in claim 1, characterized in that, The axis of rotation of the rotating component is perpendicular to the direction of fluid flow.

3. The external testing tool for the liquid phase proportional valve as described in claim 1, characterized in that, The fluid channel includes two housings that can be interlocked and detachably connected, and the rotating assembly is rotatably connected to the two housings.

4. The external testing tool for the liquid phase proportional valve as described in claim 3, characterized in that, The rotating assembly includes a shaft that rotates vertically in two housings, with multiple blades axially arranged on the shaft along its own axis.

5. The external testing tool for the liquid phase proportional valve as described in claim 4, characterized in that, The middle side of the housing has a semi-circular cavity formed therein, the rotating shaft coincides with the center of the cavity, and the distance between the outer end of the blade and the inner wall of the housing is less than 0.5 mm.

6. The external testing tool for the liquid phase proportioning valve as described in claim 3, characterized in that, The end face of the housing is provided with a sealing gasket for sealing at the point where the two housings interlock.

7. The external testing tool for the liquid phase proportional valve as described in claim 3, characterized in that, The outer wall surface at the end of the housing is threaded.

8. The external testing tool for the liquid phase proportioning valve as described in claim 4, characterized in that, The detection assembly includes a mounting ring fixed to the housing and a gear. The gear is fixed to the end of the rotating shaft that extends out of the housing and is located in the mounting ring. A speed sensor is provided on the mounting ring located on the side of the gear.

9. The external testing tool for the liquid phase proportional valve as described in claim 8, characterized in that, The speed sensor is detachably connected to the mounting ring, and an end cap is fastened to the upper end of the mounting ring.

10. The external testing tool for the liquid phase proportional valve as described in claim 1, characterized in that, The on / off component is a switch.

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