Intelligent fine-tuned pressure control device and method

Abstract

The application relates to an intelligent fine pressure control device and method, and relates to the technical field of petroleum chemical industry, and is used for solving the problem of low pressure control precision in the mode of manually adjusting the valve. The intelligent fine pressure control device comprises a pressure control valve with an inlet and an outlet, a servo actuator connected with the pressure control valve, and a control module electrically connected with the servo actuator; wherein the control module can send a pressure control instruction to the servo actuator, and the servo actuator can drive the pressure control valve to act according to the pressure control instruction, so that the pressure at the outlet is equal to a preset pressure value. In the application, the control module is arranged, and the control module is used for sending the pressure control instruction to the servo actuator, so that the servo actuator can accurately drive the pressure control valve to act according to the pressure control instruction, so as to accurately adjust the pressure value at the outlet. Therefore, the adjusting precision of the intelligent fine pressure control device is improved. Furthermore, the precision control demand of automation and intelligentization of modern industry is met.

Description

Technical Field

[0001] This invention relates to the field of petrochemical technology, and in particular to an intelligent and precise pressure control device and method. Background Technology

[0002] The petrochemical industry handles large quantities of petroleum fluids, and precise control of fluid pressure is crucial during transportation and processing. Currently, fluid pressure control largely relies on manually adjusted valves. This manual method is slow to respond and lacks precision, failing to meet the demands of modern industry for automated and intelligent precision control.

[0003] In other words, the pressure control method of manually adjusting valves in the existing technology has the problem of low pressure control accuracy. Summary of the Invention

[0004] This invention provides an intelligent and precise pressure control device and method to solve the problem of low pressure control accuracy in manual valve adjustment.

[0005] This invention provides an intelligent and precise pressure control device, comprising:

[0006] A pressure control valve having an inlet and an outlet; and

[0007] A servo actuator, which is connected to a pressure control valve; and

[0008] The control module is electrically connected to the servo actuator;

[0009] The control module can send pressure control commands to the servo actuator, which can then drive the pressure control valve to operate according to the commands, so that the pressure at the outlet is equal to the preset pressure value.

[0010] In one embodiment, the pressure control valve includes:

[0011] The valve body has a valve port and a main passage communicating with the valve port; and

[0012] The valve core is located inside the valve orifice;

[0013] The inlet is located at one end of the main passage, and the outlet is located at the other end of the main passage. The valve core is slidably connected to the inner wall of the valve hole in the first direction. The opening degree of the main passage can be controlled by sliding the valve core in the first direction.

[0014] In the above embodiments, the opening degree of the main passage is controlled by the cooperation between the valve core and the valve orifice. This allows for control of the outlet pressure by adjusting the opening degree, thus realizing the pressure control function of the pressure control valve and ensuring the normal operation of the intelligent and precise pressure control device.

[0015] In one embodiment, the valve orifice is a tapered orifice, and the valve core is a tapered structure adapted to the valve orifice.

[0016] In one implementation, the servo actuator includes:

[0017] A screw, one end of which is threadedly connected to the valve core; and

[0018] A servo motor, whose drive end is connected to the other end of the screw, is used to drive the screw to rotate; and

[0019] The signal receiving module is electrically connected to the servo motor and the control module;

[0020] The signal receiving module is used to receive the pressure control command issued by the signal receiving module and control the servo motor to rotate according to the pressure control command.

[0021] In the above embodiment, since the valve core and the valve hole are slidably connected in the first direction, when the output end of the reducer drives the screw to rotate, the valve core will not rotate with the screw. Instead, it will slide up and down in the first direction within the valve hole. This principle can be referenced from the lead screw sliding mechanism in the mechanical field.

[0022] In one implementation, the servo actuator includes:

[0023] A screw, one end of which is threadedly connected to the valve core; and

[0024] The speed reducer, whose output end is connected to the other end of the screw; and

[0025] A servo motor, the drive end of which is connected to the input end of a speed reducer; and

[0026] The signal receiving module is electrically connected to the servo motor and the control module;

[0027] The signal receiving module is used to receive the pressure control command issued by the signal receiving module and control the servo motor to rotate according to the pressure control command.

[0028] In one embodiment, the intelligent precision pressure control device further includes:

[0029] A straight-through pipe section, one end of which is connected to the outlet of the pressure control valve; and

[0030] The first plug valve has its inlet connected to the other end of the straight-through pipe section; and

[0031] The first Union tee, whose first inlet and outlet are connected to the outlet of the first plug valve; and

[0032] The second plug valve, whose inlet is connected to the second inlet / outlet of the first Union tee; and

[0033] The second Union tee has its first inlet and outlet connected to the outlet of the second plug valve, and its second inlet and outlet connected to the inlet of the pressure control valve.

[0034] In one embodiment, the intelligent precision pressure control device further includes a third plug valve, the inlet of which is connected to the second inlet and outlet of the second Union tee, the outlet of which is connected to the inlet of the pressure control valve, and the second inlet and outlet of the second Union tee are connected to the inlet of the pressure control valve through the third plug valve.

[0035] In one embodiment, the intelligent precision pressure control device further includes a union short section, which is a right-angle short section with one end connected to the other end of the straight-through pipe section. The other end of the union short section is connected to the inlet of the second plug valve, and the straight-through pipe section is connected to the first plug valve through the union short section.

[0036] In one embodiment, the intelligent precision pressure control device also includes a mounting skid on which a pressure control valve and a servo actuator are mounted.

[0037] In the above embodiment, the pressure control valve and servo actuator are mounted on an installation skid. This facilitates the overall transportation and handling of the intelligent precision pressure control device, thereby improving its ease of use.

[0038] This invention provides an intelligent and refined pressure control method, which includes:

[0039] The control module sends pressure control commands to the servo actuator;

[0040] The servo actuator drives the pressure control valve to operate according to the pressure control command;

[0041] The pressure control valve adjusts the pressure value at its outlet to the preset pressure value.

[0042] Compared with existing technologies, the advantages of this invention lie in its use of a control module to send pressure control commands to the servo actuator. This ensures that the servo actuator can accurately drive the pressure control valve according to the commands, thereby achieving precise adjustment of the outlet pressure value. This improves the adjustment accuracy of the intelligent and refined pressure control device, thus meeting the precision control requirements of modern industry for automation and intelligence. Attached Figure Description

[0043] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0044] Figure 1 This is a schematic diagram of the structure of the intelligent and precise pressure control device in Embodiment 1 of the present invention;

[0045] Figure 2 yes Figure 1A schematic diagram showing the fit between the valve orifice and valve core of the central pressure control valve;

[0046] Figure 3 This is a flowchart of the intelligent and refined pressure control method in Embodiment 2 of the present invention.

[0047] Figure label:

[0048] 10. Pressure control valve; 11. Valve body; 111. Valve orifice; 12. Valve core; 20. Servo actuator; 21. Screw; 22. Servo motor; 23. Reducer; 40. Straight-through pipe section; 50. First plug valve; 60. First union tee; 70. Second plug valve; 80. Second union tee; 90. Third plug valve; 100. Union short section; 110. Mounting skid. Detailed Implementation

[0049] The invention will now be further described with reference to the accompanying drawings.

[0050] Example 1

[0051] like Figure 1 As shown, this invention provides an intelligent and precise pressure control device, which includes a pressure control valve 10, a servo actuator 20, and a control module. The pressure control valve 10 has an inlet and an outlet; the servo actuator 20 is connected to the pressure control valve 10; and the control module is electrically connected to the servo actuator 20. The control module can send pressure control commands to the servo actuator 20, and the servo actuator 20 can drive the pressure control valve 10 to operate according to the pressure control commands, so that the pressure at the outlet equals a preset pressure value.

[0052] In the above configuration, a control module is used to send pressure control commands to the servo actuator 20. This ensures that the servo actuator 20 can accurately drive the pressure control valve 10 according to the pressure control commands, thereby achieving precise adjustment of the outlet pressure value. This improves the adjustment accuracy of the intelligent and refined pressure control device, thus meeting the precision control requirements of modern industry for automation and intelligence.

[0053] Specifically, such as Figure 1 As shown, in one embodiment, the pressure control valve 10 includes a valve body 11 and a valve core 12. The valve body 11 has a valve hole 111 and a main passage communicating with the valve hole 111. The valve core 12 is disposed within the valve hole 111. An inlet is located at one end of the main passage, and an outlet is located at the other end of the main passage. The valve core 12 is slidably connected to the inner wall of the valve hole 111 in a first direction, and the opening degree of the main passage can be controlled by sliding the valve core 12 along the first direction.

[0054] In the above configuration, the valve core 12 and valve orifice 111 cooperate to control the opening degree of the main passage. This allows for control of the outlet pressure by adjusting the opening degree, thus realizing the pressure control function of the pressure control valve 10. This, in turn, ensures the normal operation of the intelligent and precise pressure control device.

[0055] It should be noted that the first direction in this application is the direction of the central axis of the valve hole 111. Moving the valve core 12 downward can reduce the opening of the main passage, and moving the valve core 12 upward can increase the opening of the main passage.

[0056] Specifically, such as Figure 2 As shown, in one embodiment, the valve orifice 111 is a tapered orifice, and the valve core 12 is a tapered structure adapted to the valve orifice 111.

[0057] It should be noted that the cone-shaped structure in this embodiment has the following advantages:

[0058] First, good sealing performance

[0059] The conical valve core and the valve seat are sealed by a line seal or a narrow face seal. When closed, the two fit tightly together, which can effectively reduce or prevent fluid leakage. Even under high pressure conditions, the sealing effect remains stable. For example, the German HAWE check valve uses a conical valve core and has good sealing performance.

[0060] Second, precise flow regulation

[0061] The linear motion design of the conical valve core makes the flow rate and the valve core displacement linearly related. By adjusting the displacement of the valve core, the fluid flow rate can be precisely controlled. It is suitable for occasions that require precise flow rate adjustment. For example, pneumatic flow control valves using conical valve cores can precisely control the flow rate of media such as gas and liquid.

[0062] Third, strong adaptability to various media.

[0063] Cone valves are suitable for various media such as gases, liquids, and steam, and perform particularly well when handling highly corrosive or high-pressure fluids, adapting to complex working conditions.

[0064] Fourth, effective energy dissipation.

[0065] In some applications, such as intelligent reservoir cone valves, the water flow is guided by the cone valve core, which allows it to fully rub against the air and form vortices to dissipate energy, thereby reducing the impact and damage of the water flow to the downstream.

[0066] Fifth, lower flow resistance and vibration.

[0067] The valve body has a smooth internal flow channel, large flow rate and low pressure drop loss, and will not produce cavitation or vibration throughout the entire operating range, which can improve energy utilization efficiency and reduce system operating costs.

[0068] Sixth, automatic cleaning of impurities

[0069] When the valve is closed, the conical sealing surface has a scraping effect, which can automatically remove surface impurities, thus improving the service life and sealing performance of the valve disc.

[0070] Specifically, such as Figure 2 As shown, in one embodiment, the servo actuator 20 includes a screw 21, a reducer 23, a servo motor 22, and a signal receiving module. One end of the screw 21 is threadedly connected to the valve core 12; the output end of the reducer 23 is connected to the other end of the screw 21; the drive end of the servo motor 22 is connected to the input end of the reducer 23; the signal receiving module is electrically connected to the servo motor 22 and the control module; the signal receiving module receives pressure control commands issued by the signal receiving module and controls the servo motor 22 to rotate according to the pressure control commands.

[0071] It should be noted that since the valve core 12 is slidably connected to the valve hole 111 in the first direction, when the output end of the reducer 23 drives the screw 21 to rotate, the valve core 12 will not rotate with the screw 21. Instead, it will slide up and down in the first direction within the valve hole 111. This principle can be referenced from the lead screw sliding mechanism in the mechanical field.

[0072] Specifically, in one embodiment, the valve core 12 is provided with a threaded hole, and the screw 21 passes through the threaded hole and is threadedly connected to the threaded hole.

[0073] Specifically, in one embodiment, a limiting nut is provided on the screw 21 to limit the sliding position of the valve core 12 within the valve hole 111 along a first direction. This prevents the valve core 12 from falling off the screw 21.

[0074] In alternative embodiments not shown in the accompanying drawings, the servo actuator 20 includes a screw 21, a servo motor 22, and a signal receiving module. One end of the screw 21 is threadedly connected to the valve core 12; the servo motor 22 has its drive end connected to the other end of the screw 21 and is used to drive the screw 21 to rotate; the signal receiving module is electrically connected to the servo motor 22 and the control module; the signal receiving module receives pressure control commands issued by the signal receiving module and controls the servo motor 22 to rotate according to the pressure control commands.

[0075] Specifically, such as Figure 1As shown, in one embodiment, the intelligent precision pressure control device further includes a straight-through pipe section 40, one end of which is connected to the outlet of the pressure control valve 10; a first plug valve 50, the inlet of which is connected to the other end of the straight-through pipe section 40; a first Union tee 60, the first inlet and outlet of which are connected to the outlet of the first plug valve 50; a second plug valve 70, the inlet of which is connected to the second inlet and outlet of the first Union tee 60; and a second Union tee 80, the first inlet and outlet of which are connected to the outlet of the second plug valve 70, and the second inlet and outlet of the second Union tee 80 are connected to the inlet of the pressure control valve 10.

[0076] Specifically, such as Figure 1 As shown, in one embodiment, the intelligent precision pressure control device further includes a third plug valve 90, the inlet of which is connected to the second inlet and outlet of the second Union tee 80, the outlet of which is connected to the inlet of the pressure control valve 10, and the second inlet and outlet of the second Union tee 80 are connected to the inlet of the pressure control valve 10 through the third plug valve 90.

[0077] Specifically, such as Figure 1 As shown, in one embodiment, the intelligent precision pressure control device further includes a union joint 100, which is a right-angled joint. One end of the union joint 100 is connected to the other end of the straight pipe section 40, and the other end of the union joint 100 is connected to the inlet of the second plug valve 70. The straight pipe section 40 is connected to the first plug valve 50 through the union joint 100.

[0078] It should be noted that the "connection" mentioned in the above two paragraphs refers not only to connection but also to mutual conduction. For example, the above "the other end of the union stub 100 is connected to the inlet of the second plug valve 70" means that the other end of the union stub 100 is not only connected to the inlet of the second plug valve 70, but also conducts electricity at that connection.

[0079] Specifically, such as Figure 1 As shown, in one embodiment, the intelligent precision pressure control device further includes a mounting skid 110 on which a pressure control valve 10 and a servo actuator 20 are mounted.

[0080] Specifically, such as Figure 1 As shown, in one embodiment, the straight pipe section 40, the first plug valve 50, the first union tee 60, the second plug valve 70, and the second union tee 80 are all installed on the mounting skid 110.

[0081] It should be noted that the pressure control valve 10, servo actuator 20, straight-through pipe section 40, first plug valve 50, first union tee 60, second plug valve 70, and second union tee 80 are all mounted on the mounting skid 110. This facilitates the overall transportation and handling of the intelligent precision pressure control device, thereby improving its ease of use.

[0082] Specifically, such as Figure 1 As shown, in one embodiment, the mounting skid 110 is provided with a plurality of supports for supporting the parts mounted on the mounting skid 110.

[0083] Furthermore, such as Figure 1 As shown, in one embodiment, a 90° pipe section (Union 100), used for fluid flow, is fixed at its lower end to a mounting skid 110, and one of its outlet ends is fixedly connected to the inlet end of a 2" plug valve (first plug valve 50). The outlet end of the 2" plug valve is fixedly connected to the middle port of a first Union tee 60 (for fluid diversion). The inlet end of the first Union tee 60 is fixedly connected to the outlet end of a 3" plug valve (second plug valve 70). The inlet end of the 3" plug valve is fixedly connected to the outlet end of a second Union tee 80. The middle port of the second Union tee 80 is fixedly connected to the inlet end of a 2" plug valve (third plug valve 90). The outlet end of the 2" plug valve is fixedly connected to the inlet end of a pressure control valve (controlling the fluid flow rate) 10. The outlet end of the pressure control valve 10 is fixedly connected to the inlet end of a straight-through pipe section 40. A servo actuator 20 (cooperating with an actuator) is fixedly connected to the control end of the pressure control valve 10.

[0084] Working Principle: By setting the corresponding upper and lower pressure limits through the operating program, the flow rate remains stable when the pressure is constant. When the pressure changes, a variable signal ΔPa is generated and sent to the servo actuator. Upon receiving the control signal, the servo motor activates. The reducer drives the screw to rotate, actuating the valve core. This changes the gap between the valve body and the valve core, resulting in a corresponding change in the fluid flow through the orifice. Using the formula relating flow rate and opening degree, the flow rate at the corresponding opening degree can be calculated, thus achieving precise control of the fluid pressure. By controlling the opening degree of the pressure control valve 10, the liquid pressure in the main passage is adjusted to reach the preset pressure value.

[0085] Example 2

[0086] like Figure 3 As shown, this invention provides an intelligent and refined pressure control method, which includes the following steps:

[0087] Step 1: The control module sends a pressure control command to the servo actuator;

[0088] Step two: The servo actuator drives the pressure control valve to operate according to the pressure control command;

[0089] Step 3: The pressure control valve adjusts the pressure value at its outlet to the preset pressure value.

[0090] Based on the above steps, by setting up a control module, pressure control commands are sent to the servo actuator 20. This ensures that the servo actuator 20 can accurately drive the pressure control valve 10 according to the pressure control commands, thereby achieving precise adjustment of the outlet pressure value. This improves the adjustment accuracy of the intelligent and refined pressure control device, thus meeting the precision control requirements of modern industry for automation and intelligence.

[0091] Specifically, the intelligent and refined pressure control method includes the following steps:

[0092] Step 1. Receive control signals through the servo actuator to control the rotation of the servo motor;

[0093] Step 2. The servo motor drives the screw to rotate through the reducer, and the front end of the screw is connected to the conical valve core;

[0094] Step 3. The valve core moves back and forth, causing the gap between the valve body and the valve core to change, thereby responding to changes in the fluid flow diameter, i.e., changes in the opening degree.

[0095] Step 4. Calculate the flow rate at the corresponding opening degree using the formula relating flow rate and opening degree, thereby achieving precise control of fluid pressure.

[0096] Specifically, the formula for the relationship between flow rate and opening degree used above is as follows: Where Q is the flow rate, K is the flow coefficient, A is the pipe area, g is the gravitational acceleration, and ΔP is the pressure difference.

[0097] Furthermore, the formula for the relationship between flow rate and opening degree used above is:

[0098] Specific parameters are shown in Table 1 below:

[0099] Table 1. Formula parameters for the relationship between flow rate and opening degree

[0100]

[0101] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An intelligent and precise pressure control device, characterized in that, include: A pressure control valve, which has an inlet and an outlet; as well as A servo actuator connected to the pressure control valve; as well as The control module is electrically connected to the servo actuator; The control module can send pressure control commands to the servo actuator, and the servo actuator can drive the pressure control valve to operate according to the pressure control commands so that the pressure at the outlet is equal to a preset pressure value.

2. The intelligent precision pressure control device according to claim 1, characterized in that, The pressure control valve includes: A valve body having a valve port and a main passage communicating with the valve port; and The valve core is disposed within the valve orifice; The inlet is located at one end of the main passage, the outlet is located at the other end of the main passage, and the valve core is slidably connected to the inner wall of the valve hole in a first direction. The opening degree of the main passage can be controlled by sliding the valve core in the first direction.

3. The intelligent precision pressure control device according to claim 2, characterized in that, The valve orifice is a tapered orifice, and the valve core is a tapered structure adapted to the valve orifice.

4. The intelligent and precise pressure control device according to claim 2, characterized in that, The servo actuator includes: A screw, one end of which is threadedly connected to the valve core; and A servo motor, the drive end of which is connected to the other end of the screw, is used to drive the screw to rotate; and A signal receiving module, which is electrically connected to the servo motor and the control module; The signal receiving module is used to receive the pressure control command issued by the signal receiving module, and control the servo motor to rotate according to the pressure control command.

5. The intelligent precision pressure control device according to claim 2, characterized in that, The servo actuator includes: A screw, one end of which is threadedly connected to the valve core; and The speed reducer, the output end of which is connected to the other end of the screw; and A servo motor, the drive end of which is connected to the input end of the reducer; and A signal receiving module, which is electrically connected to the servo motor and the control module; The signal receiving module is used to receive the pressure control command issued by the signal receiving module, and control the servo motor to rotate according to the pressure control command.

6. The intelligent precision pressure control device according to any one of claims 1 to 5, characterized in that, The intelligent and precise pressure control device also includes: A straight-through pipe section, one end of which is connected to the outlet of the pressure control valve; and A first plug valve, the inlet of which is connected to the other end of the straight-through pipe section; and The first Union tee has its first inlet and outlet connected to the outlet of the first plug valve; and The second plug valve, whose inlet is connected to the second inlet / outlet of the first Union tee; and The second Union tee has its first inlet and outlet connected to the outlet of the second plug valve, and its second inlet and outlet connected to the inlet of the pressure control valve.

7. The intelligent precision pressure control device according to claim 6, characterized in that, The intelligent and precise pressure control device also includes a third plug valve. The inlet of the third plug valve is connected to the second inlet and outlet of the second Union tee, and the outlet of the third plug valve is connected to the inlet of the pressure control valve. The second inlet and outlet of the second Union tee are connected to the inlet of the pressure control valve through the third plug valve.

8. The intelligent precision pressure control device according to claim 6, characterized in that, The intelligent and precise pressure control device also includes a union joint, which is a right-angle joint. One end of the union joint is connected to the other end of the straight-through pipe section, and the other end of the union joint is connected to the inlet of the second plug valve. The straight-through pipe section is connected to the first plug valve through the union joint.

9. The intelligent precision pressure control device according to claim 7 or 8, characterized in that, The intelligent and precise pressure control device also includes a mounting skid on which the pressure control valve and the servo actuator are mounted.

10. A smart and precise pressure control method, characterized in that, The intelligent and precise pressure control method includes: The control module sends pressure control commands to the servo actuator; The servo actuator drives the pressure control valve to operate according to the pressure control command; The pressure control valve adjusts the pressure value at its outlet to a preset pressure value.

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