A regulating system for controlling split ratio and its working method

Abstract

The present invention provides a regulating system for controlling the diversion ratio and a working method thereof. The regulating valve has the ability to adjust any diversion ratio, can adapt to the flow control of branches or main pipes, and has a wide range of applications. It includes a regulating valve, an actuator that drives the regulating valve to move and control the opening, a controller that calculates the flow of the regulating valve, two flow sensors, a controller, a main pipe, and two branch pipes, the downstream end of the main pipe is connected to the two branch pipes respectively; the regulating valve is arranged on the main pipe or one of the branch pipes. The regulating valve meets the flow regulation requirements in a vacuum gaseous fluid environment and has high regulation accuracy. Due to the simple structure of the regulating valve, its processing cost is low.

Description

Technical Field

[0001] The present invention relates to the field of regulating valve control and vacuum fluid technology, and in particular to a regulating system for controlling a split ratio and a working method thereof. Background Art

[0002] An electric regulating valve is a pipeline pressure control device typically consisting of a flow sensor, controller, actuator, and valve body. It plays a crucial role in automatic fluid control. Existing regulating valves primarily control a single fluid and can meet most engineering applications.

[0003] However, in today's diverse application scenarios, in some pipelines or equipment with multi-way fluid diversion, it is necessary to accurately control the diversion ratio of the two material flows. When the material flow is non-steady-state, in order to keep the diversion ratio unchanged, it is necessary to dynamically control one of the material flows to follow the other non-steady-state material flow in a fixed linear relationship. In vacuum pipelines, the valve body also needs to be designed for vacuum capacity to meet the needs of controlling the diversion ratio of any two flows in vacuum pipelines with multi-way diversion.

[0004] In the prior art, since the thinner and longer pipelines themselves have a significant flow limiting effect, it is not possible to adjust the flow of the two routes by using two ordinary regulating valves. Summary of the Invention

[0005] In order to solve the deficiencies of the above technical solutions, an object of the present invention is to provide a regulating system for controlling the split ratio.

[0006] Another object of the present invention is to provide a working method of the above-mentioned adjustment system.

[0007] A regulating system for controlling a flow split ratio, characterized by comprising a regulating valve, an actuator for driving the regulating valve to control its opening, a controller for calculating the flow rate of the regulating valve, two flow sensors, a controller, a main pipeline, and two branch pipelines, wherein the downstream end of the main pipeline is connected to the two branch pipelines respectively;

[0008] The regulating valve is arranged on the main pipeline or one of the branch pipelines;

[0009] When the regulating valve is arranged on the main pipe, two flow sensors are respectively arranged on the main pipe and one of the branch pipes, and the flow sensor arranged on the main pipe is located downstream of the regulating valve;

[0010] When the regulating valve is arranged on one of the branch pipes, two flow sensors are respectively arranged on the main pipe and the branch pipe, and the flow sensor arranged on the branch pipe is located downstream of the regulating valve;

[0011] The two flow sensors are respectively connected to the controller for communication, and the controller is connected to the actuator for communication.

[0012] In the above technical solution, the regulating valve includes a valve seat and a valve core assembly, including a valve seat and a valve core assembly, the valve core assembly is installed in the valve seat, the valve core assembly includes a needle valve core, a valve core end, a bellows, a spring box and a guide tube, the spring box is installed in the valve seat to seal the two to form a vacuum environment, a bellows is arranged in the spring box, the valve core end is located inside the bellows, the needle valve core is installed on the valve core end and inside the guide tube, one end of the guide tube is installed on the valve core end, and the other end of the guide tube passes through the bellows.

[0013] In the above technical solution, the taper of the needle valve core is 30° to 90°.

[0014] A method for operating the aforementioned regulating system for controlling the split ratio comprises the following steps:

[0015] Step 1: The two flow sensors collect flow data signals from the main pipe and one of the branch pipes and output them to the controller;

[0016] Step 2: The controller receives flow data signals from the two flow sensors, and analyzes and calculates the flow data according to the split ratio θ calculation program to obtain the compensation flow Q5 that needs to be adjusted;

[0017] Step 3: The controller converts the compensation flow Q5 into the actuator drive signal and transmits it to the actuator;

[0018] Step 4: The actuator receives the driving signal to drive the regulating valve to move and control the valve opening.

[0019] In step 1, the two flow sensors are located on a main pipeline and one of the branch pipelines that are interconnected, and there is a fluid diversion relationship, wherein the main pipeline is a controlled flow Q3, and the branch pipeline is an uncontrolled flow Q2; or the main pipeline is an uncontrolled flow Q2, and the branch pipeline is a controlled flow Q3. The flow value is not limited to the synthesis of the two flow sensors or the synthesis by pressure delivery to the controller.

[0020] In step 2, the following steps are included:

[0021] Step 21, the diversion ratio θ is the ratio of the control flow Q1 to the uncontrolled flow Q2, that is, θ = Q1 / Q2, wherein the control flow Q1 is the ideal value controlled by the regulating valve, and the diversion ratio θ is an artificially set target value. When the uncontrolled flow Q2 changes, the controller calculates the control flow Q1 in real time. When there is a deviation between the control flow Q1 and the controlled flow Q3, the regulating valve needs to compensate for the deviation flow Q4. The deviation flow Q4 is the difference between the control flow Q1 and the controlled flow Q3, that is, Q4 = Q1-Q3.

[0022] Step 22, in order to make the controlled flow Q3 approach or reach the controlled flow Q1, the controlled flow Q3 requires a compensation flow Q5, and the compensation flow Q5 is in a functional relationship with the deviation flow Q4, Q5 = a*Q4+b, a and b are constants, and the function is not limited to a linear formula and is set manually according to the regulating capacity of the control valve and the working environment.

[0023] The advantages and beneficial effects of the present invention are:

[0024] 1. The regulating valve has the ability to adjust any diversion ratio, can adapt to branch pipe or main pipe flow control, and has a wide range of applications.

[0025] 2. The regulating valve meets the flow regulation requirements in a vacuum gaseous fluid environment and has high regulation accuracy. Due to the simple structure of the regulating valve, its processing cost is low.

[0026] 3. The present invention can control the sensitivity of the regulating valve through a controller, and has high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the valve core assembly of the regulating valve of the present invention.

[0028] Figure 2 Schematic diagram of Examples 2 and 3 of the present invention.

[0029] Figure 3 Schematic diagram of Examples 4 and 5 of the present invention.

[0030] in,

[0031] 1: regulating valve, 2: valve core assembly, 2-1: needle valve core, 2-2: spring box, 2-3: valve core end, 2-4: bellows, 2-5: guide tube, 3: main pipeline, 4: first branch pipeline, 5: second branch pipeline.

[0032] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to specific embodiments.

[0034] Example 1

[0035] like Figure 2 and 3 As shown, a regulating system for controlling the diversion ratio includes a first flow sensor, a second flow sensor, a controller, an actuator, a regulating valve 1, a main line 3 and two branch lines, wherein the two branch lines are a first branch line 4 and a second branch line 5, and the downstream end of the main line 3 is connected to the first branch line 4 and the second branch line 5 respectively. The first flow sensor is arranged on the main line 3, and the second flow sensor is arranged on the second branch line 5. The regulating valve 1 is arranged on the main line 3 and is located upstream of the first flow sensor (or the regulating valve 1 is arranged on the second branch line 5 and is located upstream of the second flow sensor). The first flow sensor and the second flow sensor are respectively communicated with the controller, and the controller is communicated with the actuator.

[0036] Example 2

[0037] like Figure 2 As shown, a working method of the regulating system for controlling the split ratio is shown. In this embodiment, the first flow sensor is provided on the main pipeline 3, the second flow sensor is provided on the second branch pipeline 5, the regulating valve 1 is provided on the second branch pipeline 5 and is located upstream of the second flow sensor, and the taper of the regulating valve 1 is 60°, comprising the following steps:

[0038] In step 1, the first flow sensor collects the data signal of the uncontrolled flow Q2 on the main line 3, and the second flow sensor collects the data signal of the controlled flow Q3 on the second branch line 5, and both are output to the controller, wherein the controlled flow Q3 is 1 kg / h and the uncontrolled flow Q2 is 2 kg / h.

[0039] Step 2: The controller receives data signals from the first flow sensor and the second flow sensor, and analyzes and calculates the flow data according to a split ratio calculation program to obtain a compensation flow Q5 that needs to be adjusted.

[0040] In step 3, the controller converts the compensation flow Q5 into the actuator driving signal and transmits the signal to the actuator.

[0041] Step 4: The actuator receives the driving signal to drive the regulating valve 1 to move and control the valve opening.

[0042] Example 3

[0043] Based on Example 2, step 2 includes the following steps:

[0044] In step 21, the controller receives the controlled flow Q3 of the second branch line 5 and the uncontrolled flow Q2 signal of the main line 3. The diversion ratio θ is the ratio of the control flow Q1 to the uncontrolled flow Q2, that is, θ=Q1 / Q2. The control flow Q1 is the ideal value controlled by the regulating valve 1. When the diversion ratio θ is set to 0.6, the controller calculates the control flow Q1 as 1.2 kg / h in real time. When the uncontrolled flow Q2 changes, the controller calculates the control flow Q1 in real time. When the control flow Q1 deviates from the controlled flow Q3, the deviation flow Q4 is the difference between the control flow Q1 and the controlled flow Q3, that is, Q4=Q1-Q3. The calculated deviation flow value Q4 is 0.2 kg / h.

[0045] Step 22: In order to make the controlled flow Q3 approach or reach the controlled flow Q1, the controlled flow Q3 requires a compensation flow Q5. The compensation flow Q5 is in a functional relationship with the deviation flow Q4, Q5 = 0.9Q4 - 0.05. After calculation, the compensation flow Q5 is 0.13 kg / h.

[0046] Example 4

[0047] like Figure 3 As shown, a working method of the regulating system for controlling the split ratio, in this embodiment, the first flow sensor is provided on the main line 3, the second flow sensor is provided on the second branch line 5, the regulating valve 1 is provided on the main line 3 and upstream of the first flow sensor, and the taper of the regulating valve 1 is 75°, comprising the following steps:

[0048] In step 1, the first flow sensor collects the data signal of the controlled flow Q3 on the main line 3, and the second flow sensor collects the data signal of the uncontrolled flow Q2 on the second branch line 5, and both are output to the controller, wherein the controlled flow Q3 is 9 kg / h and the uncontrolled flow Q2 is 3 kg / h.

[0049] Step 2: The controller receives data signals from the first flow sensor and the second flow sensor, and analyzes and calculates the flow data according to a split ratio calculation program to obtain a compensation flow Q5 that needs to be adjusted.

[0050] In step 3, the controller converts the compensation flow Q5 into the actuator driving signal and transmits the signal to the actuator.

[0051] Step 4: The actuator receives the driving signal to drive the regulating valve 1 to move and control the valve opening.

[0052] Example 5

[0053] On the basis of Example 4, the step 2 includes the following steps:

[0054] In step 21, the controller receives the signals of the uncontrolled flow Q2 of the second branch line 5 and the controlled flow Q3 of the main line 3. The diversion ratio θ is the ratio of the control flow Q1 to the uncontrolled flow Q2, that is, θ=Q1 / Q2. The control flow Q1 is the ideal value controlled by the regulating valve 1. When the diversion ratio θ is set to 2.5, the controller calculates the control flow Q1 as 7.5 kg / h in real time. When the uncontrolled flow Q2 changes, the controller calculates the control flow Q1 in real time. When the control flow Q1 deviates from the controlled flow Q3, the deviation flow Q4 is the difference between the control flow Q1 and the controlled flow Q3, that is, Q4=Q1-Q3. The calculated deviation flow value Q4 is -1.5 kg / h.

[0055] Step 22: In order to make the controlled flow Q3 approach or reach the controlled flow Q1, the controlled flow Q3 requires a compensation flow Q5. The compensation flow Q5 is in a functional relationship with the deviation flow Q4, Q5 = 0.8Q4 + 0.03. After calculation, the compensation flow Q5 is -0.09 kg / h.

[0056] It should be noted that in Examples 4 and 5, since the flow of the main line and the branch line is monitored in real time, the flow of the main line can be adjusted at any time, and a limited flow constraint component (such as an ordinary valve or a flow limiting orifice) is set on the branch line, and the flow of the branch line and the main line can be controlled with little change.

[0057] Example 6

[0058] like Figure 1 As shown, a regulating valve includes a valve seat and a valve core assembly 2, the valve core assembly 2 is installed in the valve seat, the valve core assembly 2 includes a needle valve core 2-1, a valve core end 2-3, a bellows 2-4, a spring box 2-2 and a guide tube 2-5, the spring box 2-2 is installed in the valve seat to seal the two to form a vacuum environment, a bellows 2-4 is arranged in the spring box 2-2, the valve core end 2-3 is located inside the bellows 2-4, the needle valve core 2-1 is installed on the valve core end 2-3 and is located inside the guide tube 2-5, one end of the guide tube 2-5 is installed on the valve core end 2-3, and the other end of the guide tube 2-5 passes through the bellows 2-4.

[0059] Specifically, the taper of the needle valve core 2 - 1 is 30° to 90°, and needle valve cores 2 - 1 with different tapers are selected according to the fluid environment to meet the regulating ability of the regulating valve 1 in different fluids.

[0060] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0061] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0062] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A regulating system for controlling the split ratio, characterized in that: The invention comprises a regulating valve, an actuator for driving the regulating valve to control the opening, a controller for calculating the flow of the regulating valve, two flow sensors, a main pipeline, and two branch pipelines, wherein the downstream end of the main pipeline is connected to the two branch pipelines respectively; The regulating valve is arranged on the main pipeline or one of the branch pipelines; When the regulating valve is arranged on the main pipe, two flow sensors are respectively arranged on the main pipe and one of the branch pipes, and the flow sensor arranged on the main pipe is located downstream of the regulating valve; When the regulating valve is arranged on one of the branch pipes, two flow sensors are respectively arranged on the main pipe and the branch pipe, and the flow sensor arranged on the branch pipe is located downstream of the regulating valve; The two flow sensors are respectively connected to the controller for communication, and the controller is connected to the actuator for communication; The regulating valve comprises a valve seat and a valve core assembly, wherein the valve core assembly is installed in the valve seat; The valve core assembly includes a spring box, which is installed in the valve seat to form a vacuum environment by sealing between the two; The valve core assembly further comprises a needle valve core and a bellows. The bellows is arranged in the spring box, and the needle valve core is arranged inside the bellows.

2. The regulating system for controlling the split ratio according to claim 1, characterized in that: The valve core assembly further comprises a flow guide tube, the flow guide tube is arranged inside the bellows, and a needle-shaped valve core is arranged inside the flow guide tube.

3. The regulating system for controlling the split ratio according to claim 2, characterized in that: The valve core assembly further comprises a valve core end head, which is located inside the bellows and is installed at one end of the flow guide pipe.

4. The regulating system for controlling the split ratio according to claim 3, characterized in that: The other end of the guide tube passes through the bellows, and the needle valve core is installed on the end of the valve core.

5. The regulating system for controlling the split ratio according to claim 3, characterized in that: The taper of the needle valve core is 30° to 90°.

6. The regulating system for controlling the split ratio according to claim 3, characterized in that: The taper of the needle valve core is 60°.

7. The regulating system for controlling the split ratio according to claim 3, characterized in that: The taper of the needle valve core is 75°.

8. The operating method of the regulating system for controlling the split ratio according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The two flow sensors collect flow data signals from the main pipe and one of the branch pipes and output them to the controller; Step 2: The controller receives flow data signals from two flow sensors, and analyzes and calculates the flow data according to the split ratio θ calculation program to obtain the compensation flow Q5 that needs to be adjusted; Step 3: The controller converts the compensation flow Q5 into the actuator drive signal and transmits it to the actuator; Step 4: The actuator receives the driving signal to drive the regulating valve to move and control the valve opening.

9. The working method according to claim 8, characterized in that: In step 1, the two flow sensors are located on the interconnected main line and one of the branch lines, and there is a fluid diversion relationship, wherein the main line is a controlled flow Q3, and the branch line is an uncontrolled flow Q2, or the main line is an uncontrolled flow Q2, and the branch line is a controlled flow Q3. The flow value is not limited to the synthesis of the two flow sensors or the synthesis by pressure delivery to the controller.

10. The working method according to claim 8, characterized in that: In step 2, the following steps are included: Step 21, the split ratio θ is the ratio of the control flow Q1 to the uncontrolled flow Q2, that is, θ = Q1 / Q2, wherein the control flow Q1 is the ideal value controlled by the regulating valve, and the split ratio θ is a manually set target value. When the uncontrolled flow Q2 changes, the controller calculates the control flow Q1 in real time. When there is a deviation between the control flow Q1 and the controlled flow Q3, the regulating valve needs to compensate for the deviation flow Q4. The deviation flow Q4 is the difference between the control flow Q1 and the controlled flow Q3, that is, Q4 = Q1 - Q3; Step 22, in order to make the controlled flow Q3 approach or reach the controlled flow Q1, the controlled flow Q3 requires a compensation flow Q5, and the compensation flow Q5 is in a functional relationship with the deviation flow Q4, Q5 = a*Q4+b, a and b are constants, and the function is not limited to a linear formula and is set manually according to the regulating capacity of the control valve and the working environment.

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