Pressure regulating system

Abstract

The present invention discloses a pressure regulating system. The pressure regulating system is used to connect a high-pressure fluid pipeline and control the fluid pressure in the high-pressure fluid pipeline, and comprises: a pressure regulator, the pressure regulator comprises a driving chamber, and the fluid pressure at the fluid outlet of the pressure regulator can be adjusted by changing the fluid pressure in the driving chamber; a first pilot valve, the fluid outlet of the first pilot valve is connected to the driving chamber of the pressure regulator to control the fluid pressure in the driving chamber, the first pilot valve comprises a control chamber, and the fluid pressure at the fluid outlet of the first pilot valve can be adjusted by changing the fluid pressure in the control chamber; and a pressure control device, the fluid outlet of the pressure control device is connected to the control chamber of the first pilot valve, and the pressure control device adjusts the fluid pressure at its fluid outlet according to the external electrical signal received to control the fluid pressure in the control chamber of the first pilot valve.

Description

Technical Field

[0001] The invention relates to a voltage regulating system. Background Art

[0002] A pressure regulator is a device that automatically changes the flow rate of a fluid passing through the pressure regulator to maintain a specified pressure at the fluid outlet. It is usually divided into two types: direct-acting and indirect-acting. Although existing pressure regulators can change the flow rate of a fluid passing through the pressure regulator, the pressure of the fluid flowing out after the change is basically a fixed value. After the pressure regulator is installed, it is difficult to adjust the fluid pressure at the fluid outlet side of the pressure regulator. Summary of the invention

[0003] In view of the defects in the prior art, the object of the present invention is to provide a pressure regulating system which can effectively control the pressure of the fluid at the fluid outlet side flowing out of the pressure regulator.

[0004] According to one aspect of the present disclosure, a pressure regulating system is provided, which is used to connect a high-pressure fluid pipeline and control the fluid pressure in the high-pressure fluid pipeline. The pressure regulating system includes: a pressure regulator, the pressure regulator includes a drive chamber, and the fluid pressure at the fluid outlet of the pressure regulator can be adjusted by changing the fluid pressure in the drive chamber; a first pilot valve, the fluid outlet of the first pilot valve is connected to the drive chamber of the pressure regulator to control the fluid pressure in the drive chamber, the first pilot valve includes a control chamber, and the fluid pressure at the fluid outlet of the first pilot valve can be adjusted by changing the fluid pressure in the control chamber; and a pressure control device, the fluid outlet of the pressure control device is connected to the control chamber of the first pilot valve, and the pressure control device adjusts the fluid pressure of its fluid outlet according to the external electrical signal received to control the fluid pressure in the control chamber of the first pilot valve.

[0005] In a pressure regulating system according to one aspect of the present disclosure, the pressure control device includes: an electrical conversion device, which converts an electrical signal into a pressure signal and controls the fluid pressure leading to the first pilot valve, and the electrical conversion device includes: a fluid inlet, connected to a high-pressure fluid pipeline on the fluid inlet side of the pressure regulator; a fluid outlet, connected to the first pilot valve; a discharge port, used to discharge the fluid in the electrical conversion device to reduce the fluid pressure in the electrical conversion device; a signal receiving element, used to receive an external electrical signal and convert the received external electrical signal into a pressure signal; a control element, connected to the signal receiving element, and controlling the opening of the discharge port according to the pressure signal; a first switch element, arranged on the fluid inlet side of the electrical conversion device, used to control the on-off of the fluid in the pipeline on the fluid inlet side of the electrical conversion device; a unidirectional flow limiting element, arranged on the fluid outlet side of the electrical conversion device, used to limit the flow of fluid on the fluid outlet side of the electrical conversion device toward the direction of the electrical conversion device.

[0006] In the pressure regulating system according to one aspect of the present disclosure, the pressure control device further includes an exhaust element, which is arranged at the outlet side of the one-way flow limiting element and is used to discharge the fluid in the pipeline on the outlet side of the one-way flow limiting element.

[0007] In the pressure regulating system according to one aspect of the present disclosure, the exhaust element is a relief valve.

[0008] In the pressure regulating system according to one aspect of the present disclosure, the one-way flow limiting element is a one-way valve.

[0009] In a pressure regulating system according to one aspect of the present disclosure, the first switch element is a solenoid valve, which receives an external electrical signal through remote data transmission and controls the on-off of a fluid in a pipeline according to the received external electrical signal.

[0010] In the pressure regulating system according to one aspect of the present disclosure, the pressure control device further includes a filter, and the filter is disposed between the first switching element and the electrical conversion device.

[0011] In the pressure regulating system according to one aspect of the present disclosure, the pressure control device further includes a pressure reducing valve, which is disposed between the first switching element and the electrical conversion device.

[0012] In the pressure regulating system according to one aspect of the present disclosure, the pressure control device further includes a needle valve, and the needle valve is disposed on the fluid outlet side of the electrical conversion device.

[0013] In the pressure regulating system according to one aspect of the present disclosure, the signal receiving element receives an external electrical signal through remote data transmission, and converts the received external electrical signal into a pressure signal.

[0014] In the pressure regulating system according to one aspect of the present disclosure, the pressure control device further includes a plurality of pressure detection devices, which respectively detect the fluid pressures in the pipelines on the fluid inlet and fluid outlet sides of the electrical conversion device.

[0015] In a pressure regulating system according to one aspect of the present disclosure, the pressure regulator includes: a first cavity; a first separation layer, arranged in the first cavity, dividing the first cavity into the driving cavity located on one side of the first separation layer and a first balancing cavity located on the other side of the first separation layer; wherein the fluid pressure at the fluid outlet of the pressure regulator is proportional to the pressure in the driving cavity.

[0016] In the pressure regulating system according to one aspect of the present disclosure, the first balancing chamber is connected to the fluid outlet side pipeline of the pressure regulator to maintain the pressure on both sides of the first separation layer in a balanced state.

[0017] In a pressure regulating system according to one aspect of the present disclosure, the first pilot valve includes: a second cavity; a second partition layer, which is arranged in the second cavity and divides the second cavity into the control cavity located on one side of the second partition layer and a second balancing cavity located on the other side of the second partition layer; wherein the fluid pressure at the fluid outlet of the first pilot valve is proportional to the pressure in the control cavity.

[0018] In the pressure regulating system according to one aspect of the present disclosure, the second balancing chamber is connected to the fluid outlet side pipeline of the pressure regulator to maintain the pressure on both sides of the second separation layer in a balanced state.

[0019] In the pressure regulating system according to one aspect of the present disclosure, the fluid inlet of the first pilot valve is connected to the high-pressure fluid pipeline.

[0020] In a pressure regulating system according to one aspect of the present disclosure, the pressure regulating system also includes a second pilot valve, which includes: a fluid outlet connected to the fluid inlet of the first pilot valve; a third cavity; and a third partition layer, which is arranged in the third cavity and divides the third cavity into a third balancing cavity and a fourth balancing cavity located on both sides of the third partition layer, wherein the third balancing cavity is connected to the fluid outlet side pipeline of the pressure regulator, and an elastic member is arranged in the fourth balancing cavity.

[0021] In a pressure regulating system according to one aspect of the present disclosure, the pressure regulating system further includes a pre-regulator, and the pre-regulator is at least connected to the high-pressure fluid pipeline and the fluid inlet of the first pilot valve.

[0022] Compared with the prior art, in the pressure regulating system provided by the present invention, since the pressure control device of the pressure regulating system can effectively control the pressure regulator of the pressure regulating system to change the pressure of the fluid flowing through the pressure regulator, and the pressure control device has a one-way limit element, it can prevent the pressure control device from affecting the pressure regulator's regulation of the fluid pressure due to power failure, device failure or communication failure, thereby ensuring the safe operation of the entire pressure regulating system. In addition, the pressure control device also has the advantages of simple structure and easy installation, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 is a schematic structural diagram showing a voltage regulating system according to an embodiment of the present invention;

[0025] Figure 2is a schematic structural diagram showing a pressure control device according to an embodiment of the present invention; and

[0026] Figure 3 Schematic diagram showing the structure of an electrical conversion device of a pressure control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] Described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of embodiments of the present invention.However, it will be appreciated by those skilled in the art that without one or more of the specific details, or adopting other methods, components, materials, etc., technical solutions of the present invention can also be put into practice.In some cases, known structures, materials or operations are not shown or described in detail to avoid blurring the present invention.

[0029] According to the main concept of the present invention, the pressure regulating system of the present invention includes: the pressure regulating system includes: a pressure regulator, the pressure regulator includes a driving chamber, and the fluid pressure at the fluid outlet of the pressure regulator can be adjusted by changing the fluid pressure in the driving chamber; a first pilot valve, the fluid outlet of the first pilot valve is connected to the driving chamber of the pressure regulator to control the fluid pressure in the driving chamber, the first pilot valve includes a control chamber, and the fluid pressure at the fluid outlet of the first pilot valve can be adjusted by changing the fluid pressure in the control chamber; and a pressure control device, the fluid outlet of the pressure control device is connected to the control chamber of the first pilot valve, and the pressure control device adjusts the fluid pressure of its fluid outlet according to the external electrical signal received to control the fluid pressure in the control chamber of the first pilot valve.

[0030] The technical content of the present invention is further described below in conjunction with the drawings and embodiments.

[0031] See also Figure 1 , which shows a schematic diagram of the structure of a pressure regulating system of an embodiment of the present invention. It should be noted that the pressure regulating system in the present invention is mainly used for the pressure control of natural gas in a natural gas pipeline. Therefore, in the following embodiments, the case where the fluid in the pipeline is natural gas is mainly used for description. Figure 1As shown, the pressure regulating system mainly includes a pressure regulator 91 , a first pilot valve 92 and a pressure control device 90 .

[0032] The pressure regulator 91 may be one of the existing pressure regulators, which at least includes a driving chamber 912. The fluid pressure at the fluid outlet of the pressure regulator can be adjusted by changing the fluid pressure in the driving chamber. Figure 1 As shown, the voltage regulator 91 generally includes a first cavity and a first separation layer 911. The first separation layer 911 may be a balance membrane. The first separation layer 911 is disposed in the first cavity, and the first cavity is divided into two parts located on one side of the first separation layer 911 ( Figure 1 The driving cavity 912 on the lower side of the first partition layer 911 and the driving cavity 912 on the other side of the first partition layer 911 ( Figure 1 The first balancing cavity 913 on the upper side of the Figure 1 In the illustrated embodiment, the fluid pressure at the fluid outlet 914 of the pressure regulator 91 is proportional to the pressure in the drive chamber 912, that is, the fluid pressure at the fluid outlet 914 of the pressure regulator 91 increases as the pressure in the drive chamber 912 increases, and decreases as the pressure in the drive chamber 912 decreases. Further, the first balancing chamber 913 is connected to the fluid outlet side pipeline of the pressure regulator 91, maintaining the pressure on both sides of the first separation layer 911 in a balanced state (that is, the pressure applied to both sides of the first separation layer 911 is equal).

[0033] More specifically, the pressure regulator 91 usually has an opening, and the high-pressure fluid in the high-pressure fluid pipeline on the fluid outlet side of the pressure regulator 91 flows in from the fluid inlet of the pressure regulator 91, passes through the opening, and then flows out from the fluid outlet of the pressure regulator 91. A valve is provided at the opening, and the flow rate of the fluid passing through the opening can be adjusted by adjusting the opening of the valve relative to the opening, thereby adjusting the fluid pressure flowing out of the fluid outlet of the pressure regulator 91. Further, referring to Figure 1 In the embodiment shown, the valve can be connected to the first partition layer 911. When the first partition layer 911 is moved toward Figure 1 When the valve moves upward, the valve moves upward. When the valve moves upward, the opening of the valve relative to the opening in the pressure regulator 91 increases, and then the fluid pressure flowing out of the fluid outlet of the pressure regulator 91 increases. It should be noted that since the first balancing chamber 913 is connected to the fluid outlet side pipeline of the pressure regulator 91, Figure 1 As shown, the increase in fluid pressure flowing out of the fluid outlet of the pressure regulator 91 will increase the pressure in the first balance chamber 913. Combined with the reduction in the volume of the first balance chamber 913 and other factors, the pressure on both sides of the first separation layer 911 can return to a balanced state.

[0034] The fluid outlet of the first pilot valve 92 is connected to the driving chamber 912 of the pressure regulator 91 to control the fluid pressure in the driving chamber 912. The first pilot valve 92 includes a control chamber, and the fluid pressure at the fluid outlet of the first pilot valve 92 can be adjusted by changing the fluid pressure in the control chamber. Specifically, the first pilot valve 92 includes at least a second chamber and a second separation layer 921. The second separation layer 921 can be a balanced membrane, which is disposed in the second chamber to separate the second chamber into two parts located on one side of the second separation layer 921 ( Figure 1 The control cavity 922 located at the other side of the second partition layer 921 ( Figure 1 The second balancing cavity 923 (upper side). Figure 1 In the illustrated embodiment, the fluid pressure at the fluid outlet 924 of the first pilot valve 92 is proportional to the pressure in the control chamber 922, that is, the fluid pressure at the fluid outlet 924 of the first pilot valve 92 increases as the pressure in the control chamber 922 increases, and decreases as the pressure in the control chamber 922 decreases. Furthermore, the second balancing chamber 923 is connected to the fluid outlet side pipeline of the pressure regulator 91 to maintain the pressure on both sides of the second partition layer 921 in a balanced state. It should be noted that openings and valves may also be provided in the first pilot valve 92, which control the fluid pressure of its fluid outlet by a distance similar to that of the above-mentioned pressure regulator 91, which will not be elaborated here. Furthermore, in Figure 1 In the illustrated embodiment, the fluid inlet 925 of the first pilot valve 92 is connected to the high-pressure fluid pipeline on the fluid inlet side of the pressure regulator 91 .

[0035] The fluid outlet of the pressure control device 90 is connected to the control chamber 912 of the first pilot valve 91, and the pressure control device 90 adjusts the fluid pressure of the fluid outlet of the control chamber 912 according to the external electrical signal received to control the fluid pressure in the control chamber 922 of the first pilot valve 92. Figure 2 , which shows a schematic structural diagram of a pressure control device according to an embodiment of the present invention. Figure 2 In the preferred embodiment shown, the pressure control device 90 mainly includes an electrical conversion device 1, a first switching element and a unidirectional current limiting element.

[0036] Specifically, the electrical conversion device 1 converts the electrical signal into a pressure signal and controls the fluid pressure of the control chamber 912 leading to the first pilot valve 91. Figure 3 , which shows a schematic diagram of the structure of an electrical conversion device of a pressure control device according to an embodiment of the present invention. Figure 3 As shown, the electrical conversion device 1 includes: a fluid inlet 11, a fluid outlet 12, an exhaust port 13, a signal receiving element 14 and a control element.

[0037] The fluid inlet 11 is used to connect to the high-pressure fluid pipeline. The fluid outlet 12 is used to connect to the control chamber 912 of the first pilot valve 91. After the fluid inlet 11 is connected to the high-pressure fluid pipeline, when the high-pressure fluid in the high-pressure fluid pipeline flows into the fluid inlet 11 of the electrical conversion device 1 and flows out from the fluid outlet 12 into the control chamber 912 of the first pilot valve 91, the fluid pressure in the control chamber 912 of the first pilot valve 91 can be increased, thereby increasing the pressure of the fluid at the fluid outlet of the pressure regulator 91 (combined with the above Figure 1 Embodiment shown).

[0038] The discharge port 13 is used to discharge the fluid in the electrical conversion device 1 to reduce the fluid pressure in the electrical conversion device 1. The discharge port 13 can discharge the fluid in the electrical conversion device 1. When the fluid in the electrical conversion device 1 is partially discharged through the discharge port 13, the pressure of the fluid in the electrical conversion device 1 is reduced, and then the pressure of the fluid flowing into the control chamber 912 of the first pilot valve 91 is reduced. Therefore, the pressure of the fluid in the pipeline on the low-pressure side of the pipeline flowing out of the high-pressure fluid pipeline after passing through the pressure regulator can be reduced. Furthermore, the amount of pressure reduction of the fluid in the pipeline on the low-pressure side of the pressure regulator can be controlled according to the amount of fluid discharged from the discharge port 13. Among them, the control of the amount of fluid discharged from the discharge port 13 can be achieved in this embodiment by, for example, controlling the opening of the discharge port 13.

[0039] The signal receiving element 14 is used to receive an external electrical signal and convert the received external electrical signal into a pressure signal. In a preferred embodiment of the present invention, the signal receiving element receives the external electrical signal through remote data transmission. For example, a signal can be sent to the signal receiving element through a remote real-time monitoring system to achieve remote control of the fluid pressure in the pipe network. The signal receiving element 14 converts the received external electrical signal into a pressure signal so as to control the pressure inside the electrical conversion device 1 through the pressure signal.

[0040] The control element (not shown) is connected to the signal receiving element 14 and controls the opening of the outlet 13 according to the pressure signal. The control element can be any element that controls the opening of the outlet 13, such as a movable valve, etc., which will not be described in detail here.

[0041] The first switch element is disposed at the fluid inlet side of the electrical conversion device, and is used to control the fluid in the pipeline at the fluid inlet side of the electrical conversion device 1. Figure 2In the embodiment shown, the first switch element can be optionally a solenoid valve 2. The solenoid valve 2 can receive an external electrical signal through remote data transmission, and control the on-off of the fluid in the pipeline according to the received external electrical signal. More preferably, the solenoid valve 2 can be set to be basically in a normally closed state, and only open when it receives an external electrical signal; in other words, the solenoid valve 2 is set to allow the fluid in the pipeline to flow only when it receives an external electrical signal. Figure 2 In the illustrated embodiment, the fluid inlet side of the electrical conversion device 1 is the left side, and the solenoid valve 2 is disposed in the high-pressure gas pipeline on the left side of the electrical conversion device 1 to control the on-off of the high-pressure gas in the pipeline.

[0042] The one-way current limiting element is arranged at the fluid outlet side of the electrical conversion device 1, and is used to limit the flow of the fluid at the fluid outlet side of the electrical conversion device 1 toward the electrical conversion device 1. Specifically, Figure 2 In the illustrated embodiment, the one-way flow limiting element is a one-way valve 3. The one-way valve 3 is disposed in the right pipeline of the electrical conversion device 1. After the fluid flowing out of the fluid outlet 12 of the electrical conversion device 1 passes through the one-way valve 3, it is restricted by the one-way valve 3 and cannot flow back to the electrical conversion device 1. The one-way valve 3 can prevent backflow, ensure the fluid pressure in the pipeline from the fluid outlet side of the electrical conversion device 1 to the driving chamber of the pressure regulator, avoid affecting the pressure control of the pressure regulator due to damage to other components in the pipeline, and protect the pipeline and the entire pressure regulating system.

[0043] It should be noted that in other embodiments of the present invention, the one-way flow limiting element may also be a solenoid valve, which is opened only when the fluid pressure in the pipeline on the fluid inlet side is greater than the fluid pressure in the pipeline on the fluid outlet side, thereby achieving its one-way flow limiting function. This embodiment can also achieve similar effects, which will not be described in detail here.

[0044] Furthermore, in an embodiment of the present invention, the pressure control device 90 further includes an exhaust element. The exhaust element is disposed at the outlet side of the one-way flow limiting element and is used to discharge the fluid in the pipeline at the outlet side of the one-way flow limiting element. Figure 1 In the illustrated embodiment, the exhaust element is a relief valve 4. The relief valve 4 is disposed in the pipeline on the fluid outlet side of the one-way valve 3, and can reduce the pressure of the gas in the pipeline by discharging the gas in the pipeline. Furthermore, when the gas pressure in the pipeline on the fluid outlet side of the one-way valve 3 remains unchanged, opening the relief valve 4 can reduce the gas pressure in the pipeline on the fluid outlet side of the one-way valve 3, thereby reducing the gas pressure in the control chamber 912 of the first pilot valve 91 connected thereto, and thereby reducing the pressure of the fluid in the pipeline on the fluid outlet side of the high-pressure fluid pipeline after the high-pressure fluid passes through the pressure regulator.

[0045] Furthermore, in an embodiment of the present invention, the pressure control device 90 further includes a filter. The filter is disposed between the first switch element and the electrical conversion device. Figure 2 As shown, the filter 5 is arranged between the solenoid valve 2 and the fluid inlet 11 of the electrical conversion device 1. The filter 5 can filter the fluid flowing into the electrical conversion device 1, remove impurities in the fluid in the pipeline, and protect the pipeline with a smaller diameter.

[0046] Furthermore, in an embodiment of the present invention, the pressure control device 90 further includes a pressure reducing valve. The pressure reducing valve is disposed between the first switch element and the electrical conversion device. Figure 2 In the embodiment shown, the pressure reducing valve 6 is disposed between the filter 5 and the fluid inlet 11 of the electrical conversion device 1. It should be noted that, since the fluid inlet 11 of the electrical conversion device 1 is connected to a high-pressure fluid pipeline, and the high-pressure fluid pipeline has a relatively high fluid pressure, the pressure reducing valve 6 can be disposed on the fluid inlet side of the electrical conversion device 1. The pressure reducing valve 6 can convert a relatively high fluid pressure (a first pressure) into a fluid with a relatively low pressure (a second pressure, which is lower than the first pressure). The above-mentioned first pressure and second pressure are both constant values. In addition, it should be noted that, although in Figure 2 In the illustrated embodiment, the pressure reducing valve 6 is disposed between the filter 5 and the fluid inlet 11 of the electrical conversion device 1, but is not limited thereto. The positions of the pressure reducing valve 6 and the filter 5 can also be interchanged, that is, the high-pressure fluid is first reduced in pressure before flowing into the filter 5 for filtration. This embodiment can also be implemented and will not be described in detail here.

[0047] Furthermore, in an embodiment of the present invention, the pressure control device 90 further includes a needle valve. The needle valve may be disposed at the fluid outlet side of the electrical conversion device. Figure 2 In the illustrated embodiment, the needle valve 7 is disposed at the fluid outlet side of the electrical conversion device 1, and the fluid flowing out of the electrical conversion device 1 flows through the needle valve 7 and then flows to the relief valve 4 and the control chamber 912 of the first pilot valve 91. The needle valve 7 can further adjust the flow rate of the fluid flowing through to protect the pipeline.

[0048] Furthermore, in an embodiment of the present invention, the pressure control device 90 further includes a plurality of pressure detection devices. The plurality of pressure detection devices can respectively detect the fluid pressure in the pipeline at the fluid inlet and fluid outlet sides of the electrical conversion device. Figure 2In the illustrated embodiment, the pressure detection device 81 is disposed in the fluid inlet side pipeline of the electrical conversion device 1 and is located at the fluid inlet side of the solenoid valve 2 to detect the pressure of the fluid flowing to the pressure control device 90; the pressure detection device 82 is disposed at the fluid outlet side of the one-way valve 3 to detect the pressure of the fluid flowing out of the electrical conversion device 1. It should be noted that each pressure detection device of the pressure control device 90 can perform remote data acquisition, such as sending it to a remote monitoring system, so as to monitor the fluid pressure in each pipeline in real time.

[0049] Further, in Figure 1 In the illustrated embodiment, the pressure regulating system further includes a second pilot valve 93. The structure of the second pilot valve 93 is similar to that of the first pilot valve 92, namely, it includes a fluid outlet, a third cavity, and a third partition layer, etc. Among them, the fluid outlet is connected to the fluid inlet 925 of the first pilot valve 92. The third partition layer is arranged in the third cavity, and the third cavity is divided into a third balancing cavity and a fourth balancing cavity located on both sides of the third partition layer, and the third balancing cavity is connected to the fluid outlet side pipeline of the pressure regulator 91. Different from the first pilot valve 92, an elastic member is arranged in the fourth balancing cavity, namely, the pressure on the side of the third partition layer close to the fourth balancing cavity is constant, and the elastic member can be a spring, etc. Figure 1 In the illustrated embodiment, the second pilot valve 93 can be used to limit the upper limit of the pressure of the fluid flowing into the driving chamber 912 of the pressure regulator 91. In addition, it should be noted that, in other embodiments of the present invention, a similar elastic member can be provided in the control chamber 922 of the first pilot valve 92 to increase the pressure on the side of the second partition layer 921 close to the control chamber 922, which will not be described in detail herein.

[0050] Furthermore, the pressure regulating system further comprises a pre-adjuster 94. The pre-adjuster is at least connected to the high-pressure fluid pipeline and the fluid inlet of the first pilot valve. Figure 1 In the illustrated embodiment, the pre-adjuster 94 is disposed at the fluid inlet side of the second pilot valve 93 , and the fluid in the high-pressure fluid pipeline flows into the fluid inlet of the second pilot valve 93 after adjusting the pre-adjuster 94 .

[0051] In summary, in the pressure regulating system provided by the embodiment of the present invention, since the pressure control device of the pressure regulating system can effectively control the first pilot valve of the pressure regulating system to change the fluid pressure flowing through the first pilot valve, and the first pilot valve can control the pressure regulator to change the fluid pressure flowing through the pressure regulator, the fluid pressure of the high-pressure fluid pipeline connected to the pressure regulating system can be achieved. In addition, the pressure control device has a one-way limiting element, which can prevent the pressure control device from affecting the pressure regulator's regulation of the fluid pressure due to power failure, device failure or communication failure, thereby ensuring the safe operation of the entire pressure regulating system. In addition, the pressure control device also has the advantages of simple structure and easy installation, and has a wide range of applications.

[0052] Although the present invention has been disclosed as above with optional embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A pressure regulating system, used to connect a high-pressure fluid pipeline and control the fluid pressure in the high-pressure fluid pipeline, characterized in that: The voltage regulating system comprises: A pressure regulator, the pressure regulator comprising a drive chamber, wherein the fluid pressure at the fluid outlet of the pressure regulator can be adjusted by changing the fluid pressure in the drive chamber; a first pilot valve, wherein a fluid outlet of the first pilot valve is connected to a driving chamber of the pressure regulator to control the fluid pressure in the driving chamber, the first pilot valve comprises a control chamber, and the fluid pressure of the fluid outlet of the first pilot valve can be regulated by changing the fluid pressure in the control chamber; and a pressure control device, wherein a fluid outlet of the pressure control device is connected to the control chamber of the first pilot valve, and the pressure control device adjusts the fluid pressure of the fluid outlet thereof according to an external electrical signal received to control the fluid pressure in the control chamber of the first pilot valve; Wherein, the pressure control device comprises: An electrical conversion device converts the electrical signal into a pressure signal and controls the fluid pressure leading to the first pilot valve, the electrical conversion device comprising: a fluid inlet, connected to a high-pressure fluid pipeline on the fluid inlet side of the pressure regulator; A fluid outlet connected to the first pilot valve; A discharge port, used to discharge the fluid in the electrical conversion device to reduce the fluid pressure in the electrical conversion device; A signal receiving element, used for receiving an external electrical signal and converting the received external electrical signal into a pressure signal; a control element connected to the signal receiving element and controlling the opening of the discharge port according to the pressure signal; a first switch element disposed at the fluid inlet side of the electrical conversion device and used to control the on-off of the fluid in the pipeline at the fluid inlet side of the electrical conversion device; A one-way flow limiting element, arranged at the fluid outlet side of the electrical conversion device, for limiting the flow of the fluid at the fluid outlet side of the electrical conversion device toward the electrical conversion device; Wherein, the voltage regulator comprises: a first cavity; A first separation layer is disposed in the first cavity, and divides the first cavity into the driving cavity located on one side of the first separation layer and a first balancing cavity located on the other side of the first separation layer; Wherein, the fluid pressure at the fluid outlet of the pressure regulator is proportional to the pressure in the driving chamber.

2. The voltage regulating system according to claim 1, characterized in that: The pressure control device further includes an exhaust element, which is disposed at the outlet side of the one-way flow limiting element and is used to discharge the fluid in the pipeline at the outlet side of the one-way flow limiting element.

3. The voltage regulating system according to claim 2, characterized in that: The exhaust element is a relief valve.

4. The voltage regulating system according to claim 1, characterized in that: The one-way flow limiting element is a one-way valve.

5. The voltage regulating system according to claim 1, characterized in that: The first switch element is a solenoid valve, which receives an external electrical signal through remote data transmission and controls the on-off of the fluid in the pipeline according to the received external electrical signal.

6. The voltage regulating system according to claim 1, characterized in that: The pressure control device further includes a filter, which is disposed between the first switch element and the electrical conversion device.

7. The voltage regulating system according to claim 1, characterized in that: The pressure control device further includes a pressure reducing valve, which is disposed between the first switch element and the electrical conversion device.

8. The voltage regulating system according to claim 1, characterized in that: The pressure control device further comprises a needle valve, which is arranged at the fluid outlet side of the electrical conversion device.

9. The voltage regulating system according to claim 1, characterized in that: The signal receiving element receives an external electrical signal through remote data transmission, and converts the received external electrical signal into a pressure signal.

10. The voltage regulating system according to claim 1, characterized in that: The pressure control device further comprises a plurality of pressure detection devices, which respectively detect the fluid pressures in the pipelines at the fluid inlet and fluid outlet sides of the electrical conversion device.

11. The voltage regulating system according to claim 1, characterized in that: The first balancing chamber is connected to the fluid outlet side pipeline of the pressure regulator to maintain the pressure on both sides of the first separation layer in a balanced state.

12. The voltage regulating system according to claim 1, characterized in that: The first pilot valve comprises: A second cavity; A second separation layer is disposed in the second cavity, and divides the second cavity into the control cavity located on one side of the second separation layer and a second balancing cavity located on the other side of the second separation layer; Wherein, the fluid pressure at the fluid outlet of the first pilot valve is proportional to the pressure in the control chamber.

13. The voltage regulating system according to claim 12, characterized in that: The second balancing chamber is connected to the fluid outlet side pipeline of the pressure regulator to maintain the pressure on both sides of the second separation layer in a balanced state.

14. The voltage regulating system according to claim 12, characterized in that: The fluid inlet of the first pilot valve is communicated with the high-pressure fluid pipeline.

15. The voltage regulating system according to claim 1, characterized in that: The pressure regulating system further includes a second pilot valve, wherein the second pilot valve includes: A fluid outlet, connected to the fluid inlet of the first pilot valve; The third cavity; The third separation layer is arranged in the third cavity, and divides the third cavity into a third balancing cavity and a fourth balancing cavity located on both sides of the third separation layer, wherein the third balancing cavity is connected to the fluid outlet side pipeline of the pressure regulator, and an elastic member is arranged in the fourth balancing cavity.

16. The voltage regulating system according to claim 1, characterized in that: The pressure regulating system further includes a pre-adjuster, and the pre-adjuster is at least connected to the high-pressure fluid pipeline and the fluid inlet of the first pilot valve.

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