Electromagnetic driven remote voltage regulating device and voltage regulating method

Abstract

The present invention relates to an electromagnetic driven remote pressure regulating device, comprising an electromagnet, and a pre-regulating valve and a pilot valve integrated into one body through a valve body; the pre-regulating valve pre-depressurizes the inlet gas that may fluctuate, and ensures that the outlet pressure of the pre-regulating valve is always greater than the outlet pressure of the pressure regulator; the electromagnet is arranged on the outlet side of the main pressure regulator of the pilot valve, and the push rod of the electromagnet directly acts on the side of the pilot valve connected to the outlet of the main pressure regulator, so that the balance equation of the valve flap of the pilot valve is: pilot valve spring force = outlet pressure of the main pressure regulator + electromagnetic force. The present invention adopts a mechanical-electromagnetic combined control structure to effectively ensure that the commander can be remotely controlled without exhausting gas, while also considering the system safety after power failure.

Description

Technical Field

[0001] The invention relates to an electromagnetic driven remote pressure regulating device and a pressure regulating method, belonging to the technical field of gas transmission and distribution equipment. Background Art

[0002] The traditional controller is the core control element of the indirect-acting voltage regulator and the remote-controlled voltage regulator, and is currently widely used in high and medium voltage regulation stations.

[0003] Existing remote control of pressure regulators generally achieves the purpose of remote regulation by adding an additional air cavity to the original valve circuit, changing the pressure in the air cavity to change the output pressure of the mechanical pressure regulator. This remote pressure regulation system is not only complex in structure and has many connection points, resulting in a high risk of leakage, but also emits a certain amount of natural gas into the atmosphere or downstream during pressure regulation, which creates certain safety risks. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an electromagnetic driven remote pressure regulating device and pressure regulating method with simple structure and higher safety performance. The remote pressure regulating controller adopts an electromagnetic pilot valve structure, adds a proportional electromagnet to the traditional mechanical pilot valve, and changes the output pressure of the pilot valve by remotely controlling the output force of the electromagnet.

[0005] The present invention adopts the following technical solutions:

[0006] An electromagnetically driven remote pressure regulating device comprises an electromagnet, and a pre-regulating valve and a pilot valve integrated into one body through a valve body 24; the pre-regulating valve pre-depressurizes the inlet gas that may fluctuate, and ensures that the outlet pressure of the pre-regulating valve is always greater than the outlet pressure of the pressure regulator; the electromagnet is arranged on the outlet side of the main pressure regulator of the pilot valve, and the push rod of the electromagnet directly acts on the side of the pilot valve connected to the outlet of the main pressure regulator, so that the balance equation of the valve disc 3-2 of the pilot valve is: pilot valve spring force = main pressure regulator outlet pressure + electromagnetic force.

[0007] Preferably, the electromagnet is fixedly connected to the valve body.

[0008] A pressure regulating method for the above-mentioned electromagnetically driven remote pressure regulating device, when there is no electromagnetic force initially, the outlet pressure of the main pressure regulator is only related to the spring force of the pilot valve, and the outlet pressure of the main pressure regulator is kept stable by setting the spring force; when a low current is input to the electromagnet 4 through the controller, the electromagnetic force can be changed, and according to the balance equation of the valve disc 3-2 of the pilot valve, the outlet pressure of the main pressure regulator will decrease at this time; conversely, by reducing the current, the outlet pressure of the main pressure regulator will increase; the maximum reduction in the outlet pressure of the main pressure regulator is positively correlated with the maximum current input by the electromagnet 4; the maximum increase in the outlet pressure of the main pressure regulator is positively correlated with the maximum current reduced by the electromagnet 4.

[0009] Preferably, the electromagnet 4 is of proportional type, and its input current and output adopt a linear relationship.

[0010] The beneficial effects of the present invention are:

[0011] 1) Provides a pressure regulating device (commander) that highly integrates a filter, a pre-regulating valve and a pilot valve, effectively reducing the risk of leakage caused by too many interfaces;

[0012] 2) Adopting mechanical-electromagnetic combined control structure effectively ensures that the controller can be remotely controlled without exhausting gas, while also considering the system safety after power failure;

[0013] 3) A high-reliability remote joint control method is provided, which performs joint control between the solenoid pilot valve and the pressure regulator through current signals, effectively avoiding the control interference of the system caused by pressure fluctuations generated by the pressure regulator when the flow rate changes, and greatly improving the stability and reliability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1-1 It is a schematic diagram of the electromagnetic driven remote voltage regulating device of the present invention;

[0015] Figure 1-2 It is a schematic diagram of the pre-adjustment component;

[0016] Figure 1-3 It is a schematic diagram of the pilot diaphragm assembly;

[0017] Figure 1-4 is a schematic diagram of a spring chamber assembly;

[0018] Figure 2 This is a schematic diagram of the electromagnetic driven remote voltage regulating device of the present invention applied to a joint regulating system;

[0019] Figure 3 It is a corresponding schematic diagram of the different regions in the implementation manner of the electromagnetic driven remote voltage regulating device of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] First, the structure of the electromagnetically driven remote voltage regulating device of the present invention is described.

[0022] An electromagnetically driven remote voltage regulating device (hereinafter referred to as the voltage regulating device) adopts an overall modular design. Figures 1-1 to 1-4, mainly composed of three functional modules: pre-adjusting valve, pilot valve and electromagnet, including pre-adjusting diaphragm assembly 15 - the pressure plate 15-3, O-ring 15-2, diaphragm 15-4 and spring seat 15-5 are sequentially inserted into the valve core 15-1 and fastened and pressed with nut 15-6, pilot diaphragm assembly 4 - the adjusting shaft 4-6, diaphragm 4-5, pressure plate 4-4, O-ring 4-3 and spring II4-2 are sequentially installed and fastened and connected with nut 4-1, spring chamber assembly 21 - O-ring 21-6 is inserted into the groove of locking nut 21-7 and screwed onto adjusting screw 21-8 as a whole, spring seat 21-2, spring III21-3, O-ring 21-4 and spring seat 21-2 are sequentially inserted into cylinder 21-1 and connected and sealed with end cover 21-5, adjusting screw 21-8 is screwed into end cover 21-5 and locking nut 21-7 is tightened.

[0023] The valve body 24, O-rings 17, 25 and pilot valve port 5 are respectively installed on the pre-adjusting valve cover 16, and the pilot diaphragm assembly 4 and the pre-adjusting valve cover 16 are inserted into the valve body 24 in sequence. The O-rings 6, 13 and the filter 11 are installed on the positioning sleeve 12, and the O-ring 9 and the valve gasket 10 are placed in the groove of the end cover 7. The end cover 7 is fastened to the positioning sleeve 12, and the O-ring 8 is sleeved on the end cover 7 and then fastened to the pilot valve cover 1. The spring I3 is sleeved on the pilot diaphragm assembly 4, and the O-ring 6 is sleeved in the groove of the push rod 28 and is fastened to the pilot diaphragm assembly 4 together. The spring 14 is sleeved on After pre-adjusting the diaphragm assembly 15, insert it into the pilot valve cover 1 together, screw 2 fastens the pilot valve cover 1 and the pre-adjusting valve cover 16, install the O-ring 26 into the groove of the joint 27 and fasten it together with the pre-adjusting valve cover 16, insert the diaphragm 18 and the pressure plate 19 in turn and fasten them together with the nut 20, put the connecting bracket 23 on the spring chamber assembly 21 and fasten it to the valve body 24 with the screw 22, put the O-ring 29 into the groove of the adapter plate 31, screw 33 fastens the electromagnet 32 ​​to the adapter plate 31, and finally screw 30 fastens the adapter plate 31 to the pilot valve cover 1.

[0024] The voltage regulation method of this electromagnetic driven remote voltage regulating device is described in detail in Figure 2. The inlet of the electromagnetic driven remote pressure regulating device is connected to the inlet of the gas pressure regulator, and the outlet is connected to the driving chamber of the pressure regulator. The sensing chamber of the pressure regulator senses the downstream outlet pressure. The pressure plate maintains balance under the force of the sensing chamber and the driving chamber on both sides of the diaphragm, that is, the outlet pressure of the pressure regulating device remains unchanged, and the outlet pressure of the main pressure regulator is also stable. A pressure transmitter is set downstream of the pressure regulator, and the controller monitors the outlet pressure of the pressure regulator through the pressure sensor. The controller also transmits signals with the electromagnet of the pressure regulating device. The controller can control the input current of the electromagnet to change the output force of the electromagnet, thereby changing the outlet pressure of the pressure regulator, and finally realizing remote joint control. Since the pressure regulator itself has spring effect, diaphragm effect and shell effect, when the flow changes, the pressure plate / sleeve opening changes, so that the original balance will be broken, and the outlet pressure will change. When the controller detects that the downstream outlet pressure drops to the set range, the controller will reduce the input current supplied to the electromagnet, so that the outlet pressure of the pilot increases, and then the force of the driving chamber of the pressure regulator increases, pushing the pressure plate / sleeve to open. When the downstream outlet pressure increases to the set range, the two ends of the pressure plate remain balanced, so that the pressure is stable within the range; conversely, when the outlet pressure increases beyond the set range, the controller will increase the input current supplied to the electromagnet, so that the outlet pressure of the pressure regulating device decreases, thereby pushing the main pressure regulator pressure plate / sleeve to the right, the main pressure regulator opening becomes smaller, and the downstream pressure decreases. The above regulation process is directly driven by current, and the input current of the electromagnet is linearly related to the output force. Therefore, the stable output current enables the outlet pressure of the pressure regulator to quickly stabilize within the AC range of the voltage regulation accuracy when the flow rate changes greatly or the inlet pressure fluctuates greatly. The joint regulation control between the pressure regulating device and the pressure regulator is carried out by using the current signal, which effectively avoids the control interference of the system caused by the pressure fluctuation generated by the pressure regulator when the flow rate changes, and greatly improves the stability and reliability of the system operation.

[0025] Combination Figure 3 When the gas at the inlet of the gas pressure regulator enters the inlet of the pressure regulating device, it will first pass through the built-in filter 1 to filter out impurities that may cause blockage. The filtered gas will be decompressed through the pre-adjustment function area 2. Since the sensing chamber of the pre-adjustment function area 2 is connected to the outlet pressure of the main pressure regulator, and a spring is set in the sensing chamber, the balance equation of the valve disc of the pre-adjustment function area 2 is: the outlet pressure of the main pressure regulator + spring = the outlet pressure of the pre-adjustment function area. The pre-adjustment function area 2 will pre-decompress the inlet gas that may fluctuate, and ensure that the outlet pressure is always greater than the outlet pressure of the pressure regulator.

[0026] The gas pre-depressurized by the pre-adjustment functional area 2 enters the inlet end of the pilot valve functional area 3. Since the gas at this time is affected by the decompression effect of the pre-adjustment functional area 2, it will not be affected too much by the system inlet pressure, ensuring the stability of the system. The valve flap 3-2 of the pilot valve functional area 3 is simultaneously affected by the spring force, the outlet pressure of the main pressure regulator and the electromagnetic force. Therefore, the balance equation of the valve flap 3-2 of the pilot valve functional area 3 is: pilot valve spring force = outlet pressure of the main pressure regulator + electromagnetic force. When there is no electromagnetic force at the beginning, the outlet pressure of the main pressure regulator is only related to the spring force. By setting the spring force, the outlet pressure of the main pressure regulator can be kept stable. When a low current is input to the electromagnet 4 through the controller, the electromagnetic force can be changed, and the outlet pressure of the main pressure regulator will be reduced; conversely, the outlet pressure of the main pressure regulator will increase by reducing the current; the maximum reduction in the outlet pressure of the main pressure regulator is positively correlated with the maximum current input by the electromagnet 4; the maximum increase in the outlet pressure of the main pressure regulator is positively correlated with the maximum current reduced by the electromagnet 4.

[0027] Therefore, even if the electromagnet 4 fails or loses power, the outlet pressure of the main voltage regulator will maintain a balance with the set spring force and will not rise abnormally, thus ensuring the safety of the system. At the same time, the electromagnet 4 is a proportional type, and its input current and output adopt a linear relationship. The electrical signal has high sensitivity and rapidity, and is not affected by changes in the gas source, making the overall regulation more stable.

[0028] The above are preferred embodiments of the present invention. Ordinary technicians in this field can also make various changes or improvements on this basis. Under the premise of not departing from the overall concept of the present invention, these changes or improvements should all fall within the scope of protection required by the present invention.

Claims

1. An electromagnetically driven remote voltage regulating device, characterized in that: It includes an electromagnet, and a pre-adjusting valve and a pilot valve integrated into one body through a valve body (24); The pre-regulating valve pre-depressurizes the inlet gas that may fluctuate, and ensures that the outlet pressure of the pre-regulating valve is always greater than the outlet pressure of the pressure regulator; The electromagnet is arranged on the main pressure regulator outlet side of the pilot valve, and the push rod of the electromagnet directly acts on the side of the pilot valve connected to the main pressure regulator outlet, so that the balance equation of the valve disc (3-2) of the pilot valve is: pilot valve spring force = main pressure regulator outlet pressure + electromagnetic force.

2. The electromagnetic driven remote voltage regulating device according to claim 1, characterized in that: The electromagnet is fixedly connected to the valve body.

3. A voltage regulating method for the electromagnetic driven remote voltage regulating device according to claim 1, characterized in that: When there is no electromagnetic force at the beginning, the outlet pressure of the main pressure regulator is only related to the spring force of the pilot valve. By setting the spring force, the outlet pressure of the main pressure regulator can be kept stable. When current is input to the electromagnet (4) through the controller, the electromagnetic force can be changed. According to the balance equation of the valve flap (3-2) of the pilot valve, the outlet pressure of the main pressure regulator will decrease. On the contrary, if the current is reduced, the outlet pressure of the main voltage regulator will increase; The maximum reduction in the outlet pressure of the main voltage regulator is positively correlated with the maximum current input by the electromagnet (4); the maximum increase in the outlet pressure of the main voltage regulator is positively correlated with the maximum current reduced by the electromagnet (4).

4. The voltage regulating method of the electromagnetic driven remote voltage regulating device according to claim 3, characterized in that: The electromagnet (4) is of proportional type, and its input current and output adopt a linear relationship.

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