Pressure regulating system and pressure regulating system control method

Abstract

The present invention provides a pressure regulating system and a pressure regulating system control method. The pressure regulating system includes a fluid inlet and a fluid outlet. The pressure regulating system also includes: a pressure regulating circuit, the two ends of the pressure regulating circuit are respectively connected to the fluid inlet and the fluid outlet; an automatic valve, which is arranged at the inlet end of the pressure regulating circuit and is connected to the pressure regulating circuit; a first cut-off valve, which is arranged on the pressure regulating circuit and is connected to the pressure regulating circuit, and the inlet end of the first cut-off valve is connected to the fluid inlet; a pressure regulating component, which is arranged on the pressure regulating circuit and is connected to the pressure regulating circuit, and the pressure regulating component is located at one end of the automatic valve away from the first cut-off valve. The present invention solves the problem of low service life of the pressure regulator in the pressure regulating system in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid pressure regulation, and in particular to a pressure regulation system and a pressure regulation system control method. Background Art

[0002] At present, when gas fuel or other fluids are used as working media, the pressure difference between the source pressure and the use pressure of the fluid is very large, and it is usually necessary to set up a separate pressure regulating circuit to adjust the pressure of the fluid to facilitate use in different occasions.

[0003] In the existing pressure regulating circuit, it is usually necessary to manually switch the pressure regulating circuit or manually control the opening of the valve in the pressure regulating circuit to achieve safe cut-in of the pressure regulating circuit; however, manual human control is limited by the operating skills and experience of the personnel, and the switching speed is slow, which cannot meet the response time requirements of the equipment, and the components of the pressure regulator in the pressure regulating system are easily damaged when the pressure is switched quickly or the pressure difference is large, which affects the service life of the pressure regulator. In some pressure regulating systems in the prior art, the valve components cannot adapt to the impact of short-term and large pressure differences, which is caused by manual control, resulting in different operating experience of operators, high probability of error, long cut-in time, and easy damage to valve components due to large impacts, which affects the service life of the pressure regulator. Summary of the invention

[0004] The main purpose of the present invention is to provide a voltage regulating system and a voltage regulating system control method to solve the problem of low service life of the voltage regulator in the voltage regulating system in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a pressure regulating system, comprising a fluid inlet and a fluid outlet, the pressure regulating system further comprising: a pressure regulating circuit, wherein both ends of the pressure regulating circuit are respectively connected to the fluid inlet and the fluid outlet; an automatic valve, arranged at the inlet end of the pressure regulating circuit and connected to the pressure regulating circuit; a first shut-off valve, arranged on the pressure regulating circuit and connected to the pressure regulating circuit, wherein the inlet end of the first shut-off valve is connected to the fluid inlet; a pressure regulating assembly, arranged on the pressure regulating circuit and connected to the pressure regulating circuit, wherein the pressure regulating assembly is located at one end of the automatic valve away from the first shut-off valve.

[0006] Furthermore, the pressure regulating system also includes: a safety circuit, which is arranged at the outlet end of the pressure regulating circuit, and the safety circuit is connected to the pressure regulating circuit; a protection valve is arranged on the safety circuit, and the protection valve is connected to the safety circuit.

[0007] Furthermore, the protective valve includes a safety valve and a first vent valve, the safety circuit includes a first branch and a second branch arranged in parallel, the first branch is provided with a safety valve, and the second branch is provided with a first vent valve; the safety circuit also includes: a first confluence trunk, the inlet end of the first confluence trunk is connected to the pressure regulating circuit, and the outlet end of the first confluence trunk is respectively connected to the first branch and the second branch.

[0008] Furthermore, the safety circuit also includes: a second merging trunk, the inlet end of the second merging trunk is respectively connected to the first branch and the second branch, and the outlet end of the second merging trunk is connected to the fluid inlet; a third branch, the two ends of the third branch are respectively connected to the second merging trunk and the pressure regulating circuit, and a second vent valve is arranged on the third branch.

[0009] Furthermore, the pressure regulating system also includes: a first inflow branch, which is arranged in parallel with the pressure regulating circuit, and both ends of the first inflow branch are respectively connected to the pressure regulating circuit, the inlet end of the first inflow branch is located on the fluid inlet side of the first shut-off valve, and the outlet end of the first inflow branch is located between the first shut-off valve and the automatic valve; a second shut-off valve is arranged on the first inflow branch and is connected to the first inflow branch.

[0010] Furthermore, the pressure regulating system also includes: a second inflow branch, which is arranged in parallel with the pressure regulating circuit, and both ends of the second inflow branch are respectively connected to the pressure regulating circuit, the inlet end of the second inflow branch is located between the first shut-off valve and the automatic valve, and the outlet end of the second inflow branch is located on the fluid outlet side of the automatic valve; a third shut-off valve is arranged on the second inflow branch and is connected to the second inflow branch.

[0011] Furthermore, a PID adjustment module is provided in the automatic valve.

[0012] Furthermore, the pressure regulating assembly includes: a fourth shut-off valve, which is arranged on the pressure regulating circuit and connected to the pressure regulating circuit; a pressure regulating pipeline, which is arranged in parallel with the pressure regulating circuit, and both ends of the pressure regulating pipeline are respectively connected to the fourth shut-off valve and the pressure regulating circuit.

[0013] Furthermore, the pressure regulating component also includes: a pressure regulating valve, which is arranged on the pressure regulating circuit, and the pressure regulating valve is located at the outlet end of the fourth shut-off valve; a pressure-leading pipeline, which is arranged in parallel with the pressure regulating circuit, and the two ends of the pressure-leading pipeline are respectively connected to the pressure regulating valve and the pressure regulating circuit; the outlet end of the pressure regulating pipeline is located at the fluid outlet side of the pressure-leading pipeline.

[0014] Furthermore, there are multiple pressure regulating valves, which are sequentially arranged on the pressure regulating circuit along the flow direction of the fluid; there are multiple pressure-leading pipelines, which are arranged one-to-one with the multiple pressure regulating valves.

[0015] Furthermore, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve arranged in sequence along the flow direction of the fluid, and the multiple pressure-leading pipelines include a first pressure-leading pipeline and a second pressure-leading pipeline; the first pressure-leading pipeline is connected to the first pressure regulating valve, and the second pressure-leading pipeline is connected to the second pressure regulating valve; wherein, the outlet end of the first pressure-leading pipeline is located on the fluid outlet side of the second pressure-leading pipeline, and the outlet end of the pressure regulating pipeline is located on the fluid outlet side of the first pressure-leading pipeline.

[0016] Furthermore, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve arranged in sequence along the flow direction of the fluid, and the multiple pressure-leading pipelines include a first pressure-leading pipeline and a second pressure-leading pipeline; the first pressure-leading pipeline is connected to the first pressure regulating valve, and the second pressure-leading pipeline is connected to the second pressure regulating valve; wherein, the outlet end of the first pressure-leading pipeline is located on the fluid inlet side of the second pressure regulating valve, and the outlet end of the pressure regulating pipeline is located on the fluid outlet side of the second pressure-leading pipeline.

[0017] Furthermore, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve which are arranged in sequence along the flow direction of the fluid, and the multiple pressure-leading pipelines include a first pressure-leading pipeline and a second pressure-leading pipeline; the first pressure-leading pipeline is connected to the first pressure regulating valve, and the second pressure-leading pipeline is connected to the second pressure regulating valve; wherein, the outlet end of the first pressure-leading pipeline is located on the fluid inlet side of the second pressure regulating valve, and the outlet end of the pressure regulating pipeline is located between the outlet end of the first pressure-leading pipeline and the inlet end of the second pressure regulating valve.

[0018] Furthermore, there are multiple fourth shut-off valves, which are sequentially arranged along the flow direction of the fluid, and there are multiple pressure regulating pipelines, which are arranged one-to-one correspondingly to the multiple fourth shut-off valves.

[0019] Further, the plurality of fourth shut-off valves include a first unit shut-off valve and a second unit shut-off valve sequentially arranged along the flow direction of the fluid, the plurality of pressure regulating pipelines include a first pressure regulating pipeline and a second pressure regulating pipeline, the first pressure regulating pipeline is connected to the first unit shut-off valve, and the second pressure regulating pipeline is connected to the second unit shut-off valve; the plurality of pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve sequentially arranged along the flow direction of the fluid, the plurality of pressure lead pipelines include a first pressure lead pipeline and a second pressure lead pipeline; the first pressure lead pipeline is connected to the first pressure regulating valve, and the second pressure lead pipeline is connected to the second pressure regulating valve; wherein, the outlet end of the first pressure lead pipeline is located at the fluid inlet side of the second pressure regulating valve, the outlet end of the second pressure regulating pipeline is located between the fluid outlet side of the first pressure lead pipeline and the fluid inlet side of the second pressure regulating valve, and the outlet end of the first pressure regulating pipeline is located at the fluid outlet side of the second pressure lead pipeline.

[0020] According to another aspect of the present invention, a pressure regulating system control method is provided, which is applicable to the above-mentioned pressure regulating system, and the pressure regulating system control method includes: adjusting the first shut-off valve to a first predetermined opening value; opening the automatic valve; and continuing to open the first shut-off valve to a maximum opening.

[0021] Furthermore, the method for obtaining a predetermined opening value includes: after receiving a pressure regulation instruction, detecting the instantaneous pressure value of the fluid at the fluid inlet, and detecting the current opening value of the first shut-off valve; comparing the instantaneous pressure value with a preset pressure threshold in the system, and when the instantaneous pressure value is within the pressure threshold range, using an interpolation method to determine the allowable opening value of the first shut-off valve corresponding to the instantaneous pressure value for allowing fluid to pass through; comparing the current opening value with the allowable opening value, and when the difference between the current opening value and the allowable opening value is less than or equal to the preset difference ratio, the current opening value is the first predetermined opening value.

[0022] Furthermore, the pressure regulating system control method further includes: after the first cut-off valve operates at the first predetermined opening value for a predetermined time period; opening the first cut-off valve to a maximum opening.

[0023] Furthermore, the pressure regulating system is the above-mentioned pressure regulating system, and the pressure regulating system control method also includes: detecting the instantaneous pressure value of the fluid inlet, opening the first shut-off valve to a second predetermined opening value; opening the second shut-off valve and the third shut-off valve; opening the automatic valve; and opening the first shut-off valve to the maximum opening.

[0024] According to the technical solution of the present invention, the pressure regulating system includes a fluid inlet and a fluid outlet, wherein the pressure regulating system also includes: a pressure regulating circuit, wherein the two ends of the pressure regulating circuit are respectively connected to the fluid inlet and the fluid outlet; an automatic valve, which is arranged at the inlet end of the pressure regulating circuit and is connected to the pressure regulating circuit; a first cut-off valve, which is arranged on the pressure regulating circuit and is connected to the pressure regulating circuit, wherein the inlet end of the first cut-off valve is connected to the fluid inlet; a pressure regulating assembly, which is arranged on the pressure regulating circuit and is connected to the pressure regulating circuit, wherein the pressure regulating assembly is located at an end of the automatic valve away from the first cut-off valve. By arranging the first cut-off valve and the automatic valve on the pressure regulating circuit, after receiving the pressure regulating instruction, the openings of the first cut-off valve and the automatic valve are respectively adjusted to adapt to the change of the fluid pressure in the pressure regulating circuit, which can protect the subsequent pressure regulating assembly, and the fluid will not directly rush into the pressure regulating assembly to cause damage to components, especially the pressure regulating valve in the pressure regulating assembly, and such an arrangement prolongs the service life of the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic structural diagram of a first embodiment of a voltage regulating system according to the present invention is shown;

[0027] Figure 2 Shown according to Figure 1 A partial enlarged view of the pressure regulating system;

[0028] Figure 3 A schematic structural diagram of a second embodiment of a voltage regulating system according to the present invention is shown;

[0029] Figure 4 Shown according to Figure 3 A partial enlarged view of the pressure regulating system;

[0030] Figure 5 A schematic structural diagram of a first embodiment of a voltage regulating assembly in a voltage regulating system according to the present invention is shown;

[0031] Figure 6 A schematic structural diagram of a second embodiment of a voltage regulating assembly in a voltage regulating system according to the present invention is shown;

[0032] Figure 7 A schematic structural diagram of a third embodiment of a voltage regulating assembly in a voltage regulating system according to the present invention is shown;

[0033] Figure 8 A schematic structural diagram of a fourth embodiment of a voltage regulating assembly in a voltage regulating system according to the present invention is shown;

[0034] Fig. 9 A schematic structural diagram of a fifth embodiment of a voltage regulating assembly in a voltage regulating system according to the present invention is shown;

[0035] Fig.10 A control flow chart of a first embodiment of a voltage regulation system control method according to the present invention is shown;

[0036] Fig.11 A control flow chart of a second embodiment of a voltage regulation system control method according to the present invention is shown;

[0037] Fig.12 A control flow chart of a third embodiment of a voltage regulation system control method according to the present invention is shown.

[0038] The above drawings include the following reference numerals:

[0039] 100, fluid inlet; 200, fluid outlet; 300, inlet manifold; 400, outlet manifold;

[0040] 1. Pressure regulating circuit; 2. Automatic valve; 3. First shut-off valve; 4. Pressure regulating assembly; 40. Fourth shut-off valve; 401. First unit shut-off valve; 402. Second unit shut-off valve; 41. Pressure regulating pipeline; 411. First pressure regulating pipeline; 412. Second pressure regulating pipeline; 42. Pressure regulating valve; 421. First pressure regulating valve; 422. Second pressure regulating valve; 43. Pressure-guiding pipeline; 431. First pressure-guiding pipeline; 432. Second pressure-guiding pipeline;

[0041] 5. Safety circuit; 51. First branch; 52. Second branch; 510. Safety valve; 520. First vent valve; 53. First confluence trunk; 54. Second confluence trunk; 55. Third branch; 550. Second vent valve; 6. First inflow branch; 60. Second shut-off valve; 7. Second inflow branch; 70. Third shut-off valve;

[0042] 30. Valve position sensor. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] Please refer to Figures 1 to 9 The present invention provides a pressure regulating system, including a fluid inlet 100 and a fluid outlet 200, and the pressure regulating system also includes: a pressure regulating circuit 1, wherein both ends of the pressure regulating circuit 1 are respectively connected to the fluid inlet 100 and the fluid outlet 200; an automatic valve 2, which is arranged at the inlet end of the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1; a first shut-off valve 3, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, and the inlet end of the first shut-off valve 3 is connected to the fluid inlet 100; a pressure regulating component 4, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, and the pressure regulating component 4 is located at one end of the automatic valve 2 away from the first shut-off valve 3.

[0045] In the first embodiment provided by the present invention, Figure 1 and Figure 2 As shown, the pressure regulating system provided by the present invention comprises a fluid inlet 100 and a fluid outlet 200, wherein the pressure regulating system further comprises: a pressure regulating circuit 1, wherein both ends of the pressure regulating circuit 1 are respectively connected to the fluid inlet 100 and the fluid outlet 200; an automatic valve 2, which is arranged at the inlet end of the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1; a first cut-off valve 3, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, wherein the inlet end of the first cut-off valve 3 is connected to the fluid inlet 100; and a pressure regulating assembly 4, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, wherein the pressure regulating assembly 4 is located at one end of the automatic valve 2 away from the first cut-off valve 3. By arranging the first cut-off valve 3 and the automatic valve 2 on the pressure regulating circuit 1, after receiving the pressure regulating instruction, the openings of the first cut-off valve 3 and the automatic valve 2 are respectively adjusted to adapt to the change of the fluid pressure in the pressure regulating circuit, which can protect the subsequent pressure regulating assembly 4, and the fluid will not directly rush into the pressure regulating assembly 4 to cause damage to components, especially the pressure regulating valve in the pressure regulating assembly 4, and such arrangement prolongs the service life of the pressure regulating valve.

[0046] Preferably, there are multiple pressure regulating circuits 1, and the multiple pressure regulating circuits 1 are arranged in parallel, and any one of the multiple pressure regulating circuits 1 can be opened according to actual needs. The pressure regulating system also includes an inlet collection pipe 300 and an outlet collection pipe 400, and the fluid inlet 100 is arranged on the inlet collection pipe 300. The inlet end of each pressure regulating circuit 1 is connected to the inlet collection pipe 300, and the fluid is introduced into each pressure regulating circuit 1 through the inlet collection pipe 300; the outlet end of each pressure regulating circuit 1 is connected to the outlet collection pipe 400, and the fluid flowing out of each pressure regulating circuit 1 is collected through the outlet collection pipe 400.

[0047] In order to ensure the safety of the pressure regulating circuit 1 and prevent the pressure regulating circuit from being damaged by excessive fluid pressure, the pressure regulating system further includes: a safety circuit 5, which is arranged at the outlet end of the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1; a protection valve is arranged on the safety circuit 5 and is connected to the safety circuit 5. Through the protection valve, part of the fluid is released when the fluid pressure is too high, so as to protect the pressure regulating circuit 1.

[0048] In specific implementation, the protection valve includes a safety valve 510 and a first vent valve 520, and the safety circuit 5 includes a first branch 51 and a second branch 52 arranged in parallel, the first branch 51 is provided with a safety valve 510, and the second branch 52 is provided with a first vent valve 520; the safety circuit 5 also includes: a first confluence trunk 53, the inlet end of the first confluence trunk 53 is connected to the pressure regulating circuit 1, and the outlet end of the first confluence trunk 53 is respectively connected to the first branch 51 and the second branch 52. The safety circuit 5 also includes: a second confluence trunk 54, the inlet end of the second confluence trunk 54 is respectively connected to the first branch 51 and the second branch 52, and the outlet end of the second confluence trunk 54 is connected to the fluid inlet 100; a third branch 55, the two ends of the third branch 55 are respectively connected to the second confluence trunk 54 and the pressure regulating circuit 1, and the third branch 55 is provided with a second vent valve 550. When the fluid pressure in the pressure regulating circuit 1 is too high, the safety valve 510 opens, and part of the fluid flows through the safety valve 510 to the second confluence trunk 54, and then flows back to the fluid inlet for the next cycle; when the fluid pressure reaches a certain height, one of the first drain valve 520 or the second drain valve 550 is opened or both are opened to release part of the fluid.

[0049] In the second embodiment provided by the present invention, Figure 3 and Figure 4As shown, this embodiment is an improvement made on the basis of the first embodiment. Specifically, the pressure regulating system further includes: a first inflow branch 6, which is arranged in parallel with the pressure regulating circuit 1, and the two ends of the first inflow branch 6 are respectively connected to the pressure regulating circuit 1, the inlet end of the first inflow branch 6 is located at the fluid inlet side of the first cut-off valve 3, and the outlet end of the first inflow branch 6 is located between the first cut-off valve 3 and the automatic valve 2; a second cut-off valve 60, which is arranged on the first inflow branch 6 and is connected to the first inflow branch 6. In this way, when the fluid flows into the pressure regulating circuit 1, part of the fluid pressure in the first cut-off valve 3 is shared by the second cut-off valve 60, so as to protect the first cut-off valve 3.

[0050] Furthermore, the pressure regulating system further includes: a second inflow branch 7, which is arranged in parallel with the pressure regulating circuit 1, and the two ends of the second inflow branch 7 are respectively connected to the pressure regulating circuit 1, the inlet end of the second inflow branch 7 is located between the first cut-off valve 3 and the automatic valve 2, and the outlet end of the second inflow branch 7 is located at the fluid outlet side of the automatic valve 2; a third cut-off valve 70, which is arranged on the second inflow branch 7 and is connected to the second inflow branch 7. The automatic valve 2 is protected by the third cut-off valve 70, and when the fluid enters the pressure regulating circuit 1, the second cut-off valve 60 and the third cut-off valve 70 are opened to avoid the situation that the opening of the first cut-off valve 3 is too small to withstand the fluid pressure.

[0051] In the third embodiment provided by the present invention, this embodiment is an improvement made on the basis of the second embodiment, specifically, a PID adjustment module is provided in the automatic valve 2. By providing the PID adjustment module in the automatic valve 2, the automatic valve 2 has a PID adjustment function, and when the first cut-off valve 3, the second cut-off valve 60 and the third cut-off valve 70 on the pressure regulating circuit 1 are fully opened, the opening of the automatic valve 2 is automatically adjusted according to different inlet and outlet pressure differences, and the automatic valve 2 is gradually opened automatically to achieve safe inflow of fluid.

[0052] In the present invention, the pressure regulating component 4 has different implementation modes. The following different implementation modes of the pressure regulating component 4 are applicable to any one of the above-mentioned embodiments 1 to 3. Specifically, the pressure regulating component 4 includes: a fourth shut-off valve 40, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1; a pressure regulating pipeline 41, which is arranged in parallel with the pressure regulating circuit 1, and the two ends of the pressure regulating pipeline 41 are respectively connected to the fourth shut-off valve 40 and the pressure regulating circuit 1.

[0053] In a first embodiment of the voltage regulating assembly 4, as Figure 5As shown, the pressure regulating assembly 4 also includes: a pressure regulating valve 42, which is arranged on the pressure regulating circuit 1, and the pressure regulating valve 42 is located at the outlet end of the fourth shut-off valve 40; a pressure-conducting pipeline 43, which is arranged in parallel with the pressure regulating circuit 1, and the two ends of the pressure-conducting pipeline 43 are respectively connected with the pressure regulating valve 42 and the pressure regulating circuit 1; and the outlet end of the pressure regulating pipeline 41 is located at the fluid outlet side of the pressure-conducting pipeline 43. In this way, when the fluid pressure is too high, the bypass pipeline of the fourth shut-off valve 40 is opened, and part of the fluid flows into the pressure regulating circuit 1 through the pressure regulating pipeline 41 across the pressure regulating valve 42, and the pressure of the other part of the fluid is regulated by the pressure regulating valve 42. In the actual application process, in order to ensure that the pressure at the fluid outlet is the required pressure value, the pressure of the other part of the fluid in the pressure regulating valve 42 will be less than the predetermined pressure in the system, so that when the fluid pressure-regulated by the pressure regulating valve 42 converges with the fluid in the pressure regulating pipeline 41, the pressure at the fluid outlet 200 can be guaranteed to be the required pressure.

[0054] In a second embodiment of the voltage regulating assembly 4, as Figure 6 As shown, there are multiple pressure regulating valves 42, which are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; there are multiple pressure-leading pipelines 43, which are arranged one-to-one with the multiple pressure regulating valves 42.

[0055] In this embodiment, two pressure regulating valves are used as an example. The multiple pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 arranged in sequence along the flow direction of the fluid. The multiple pressure-conducting pipelines 43 include a first pressure-conducting pipeline 431 and a second pressure-conducting pipeline 432. The first pressure-conducting pipeline 431 is connected to the first pressure regulating valve 421, and the second pressure-conducting pipeline 432 is connected to the second pressure regulating valve 422. The outlet end of the first pressure-conducting pipeline 431 is located at the fluid outlet side of the second pressure-conducting pipeline 432, and the outlet end of the pressure regulating pipeline 41 is located at the fluid outlet side of the first pressure-conducting pipeline 431. In this arrangement, the first pressure regulating valve 421 and the second pressure regulating valve 422 are used to jointly regulate the pressure of the fluid. One part of the fluid is regulated by the first pressure regulating valve 421, and the other part of the fluid is regulated by the second pressure regulating valve 422, so as to protect each pressure regulating valve.

[0056] In the third embodiment of the voltage regulating assembly 4, as Figure 7 As shown, there are multiple pressure regulating valves 42, which are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; there are multiple pressure-leading pipelines 43, which are arranged one-to-one with the multiple pressure regulating valves 42.

[0057] This embodiment is illustrated by taking two pressure regulating valves as an example. The multiple pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 arranged in sequence along the flow direction of the fluid. The multiple pressure-conducting pipelines 43 include a first pressure-conducting pipeline 431 and a second pressure-conducting pipeline 432. The first pressure-conducting pipeline 431 is connected to the first pressure regulating valve 421, and the second pressure-conducting pipeline 432 is connected to the second pressure regulating valve 422. The outlet end of the first pressure-conducting pipeline 431 is located at the fluid inlet side of the second pressure regulating valve 422, and the outlet end of the pressure regulating pipeline 41 is located at the fluid outlet side of the second pressure-conducting pipeline 432. In this way, the fluid is pressure-regulated in stages, the first pressure regulating valve 421 is used to regulate the fluid pressure, and the second pressure regulating valve 422 is used to regulate the fluid pressure for the second time, so as to achieve the purpose of protecting each pressure regulating valve 42.

[0058] In the fourth embodiment of the voltage regulating assembly 4, as shown in FIG. Figure 8 As shown, there are multiple pressure regulating valves 42, which are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; there are multiple pressure-leading pipelines 43, which are arranged one-to-one with the multiple pressure regulating valves 42.

[0059] This embodiment is illustrated by taking two pressure regulating valves as an example, the multiple pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 which are sequentially arranged along the flow direction of the fluid, and the multiple pressure-leading pipelines 43 include a first pressure-leading pipeline 431 and a second pressure-leading pipeline 432; the first pressure-leading pipeline 431 is connected to the first pressure regulating valve 421, and the second pressure-leading pipeline 432 is connected to the second pressure regulating valve 422; wherein, the outlet end of the first pressure-leading pipeline 431 is located at the fluid inlet side of the second pressure regulating valve 422, and the outlet end of the pressure regulating pipeline 41 is located between the outlet end of the first pressure-leading pipeline 431 and the inlet end of the second pressure regulating valve 422. In this way, the fluid pressure is adjusted in stages. The first pressure regulating valve 421 is used to adjust the fluid pressure, and the second pressure regulating valve 422 is used to adjust the fluid pressure for the second time. When the pressure regulating pipeline 41 diverts part of the fluid to the pressure regulating circuit, it merges with the fluid in the first pressure-leading pipeline 431. Furthermore, the second pressure regulating valve 422 is used to adjust the pressure to protect each pressure regulating valve 42.

[0060] In the fifth embodiment of the voltage regulating assembly 4, as Fig. 9 As shown, there are multiple fourth shutoff valves 40 , which are sequentially arranged along the flow direction of the fluid, and there are multiple pressure regulating pipelines 41 , which are arranged one-to-one with the multiple fourth shutoff valves 40 .

[0061] In this embodiment, two fourth shut-off valves 40 and two pressure regulating valves 42 are taken as examples. The plurality of fourth shut-off valves 40 include a first unit shut-off valve 401 and a second unit shut-off valve 402 sequentially arranged along the flow direction of the fluid. The plurality of pressure regulating pipelines 41 include a first pressure regulating pipeline 411 and a second pressure regulating pipeline 412. The first pressure regulating pipeline 411 is connected to the first unit shut-off valve 401, and the second pressure regulating pipeline 412 is connected to the second unit shut-off valve 402. The plurality of pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 sequentially arranged along the flow direction of the fluid. 2, the multiple pressure-conducting pipelines 43 include a first pressure-conducting pipeline 431 and a second pressure-conducting pipeline 432; the first pressure-conducting pipeline 431 is connected to the first pressure regulating valve 421, and the second pressure-conducting pipeline 432 is connected to the second pressure regulating valve 422; wherein, the outlet end of the first pressure-conducting pipeline 431 is located at the fluid inlet side of the second pressure regulating valve 422, the outlet end of the second pressure regulating pipeline 412 is located between the fluid outlet side of the first pressure-conducting pipeline 431 and the fluid inlet side of the second pressure regulating valve 422, and the outlet end of the first pressure regulating pipeline 411 is located at the fluid outlet side of the second pressure-conducting pipeline 432. In this arrangement, the multiple pressure regulating pipelines 41 are used to divert the fluid, and then the multiple pressure regulating valves 42 are used to regulate the pressure of the diverted fluid respectively, thereby protecting each pressure regulating valve 42.

[0062] The present invention also provides a voltage regulation system control method, such as Figures 10 to 12 As shown, the pressure regulating system applicable to the above embodiment, the pressure regulating system control method includes: adjusting the first shut-off valve 3 to a first predetermined opening value; opening the automatic valve 2; and continuing to open the first shut-off valve 3 to the maximum opening. In this way, the first shut-off valve 3 is first opened to a predetermined opening, and after a part of the fluid passes through the first shut-off valve 3, the automatic valve 2 is opened, and the automatic valve 2 adjusts its own opening according to the inflow pressure of the fluid. When the system is stable, the first shut-off valve 3 is fully opened. Among them, a valve position sensor 30 is provided on the first shut-off valve 3 to detect the opening of the first shut-off valve 3.

[0063] In the first embodiment of the pressure regulating system control method provided by the present invention, the method for obtaining the predetermined opening value includes: after receiving the pressure regulating instruction, detecting the instantaneous pressure value of the fluid at the fluid inlet 100, and detecting the current opening value of the first cut-off valve 3; comparing the instantaneous pressure value with the pressure threshold value preset in the system, and when the instantaneous pressure value is within the pressure threshold range, using the interpolation method to determine the allowable opening value of the first cut-off valve 3 corresponding to the instantaneous pressure value to allow the fluid to pass through; comparing the current opening value with the allowable opening value, when the difference between the current opening value and the allowable opening value is less than or equal to the preset difference ratio, the current opening value is the first predetermined opening value. In the pressure regulating system, different pressure values ​​at the fluid inlet 100 correspond to different openings of the first cut-off valve 3, and the two are in a linear relationship. Then, after receiving the pressure regulating instruction, the instantaneous pressure value of the fluid at the fluid inlet 100 is compared with the pressure value stored in the system, and when the actual instantaneous pressure value is within the threshold value stored in the system, the allowable opening value of the first cut-off valve 3 to allow the fluid to pass through is obtained by using the interpolation method. Specifically, the preset difference ratio a is greater than or equal to 0.0001.

[0064] The pressure regulating system control method further includes: after the first cut-off valve 3 operates at the first predetermined opening value for a predetermined time; opening the first cut-off valve 3 to the maximum opening. This is set to ensure that the first cut-off valve 3 operates stably within the predetermined time s, and then fully open the first cut-off valve 3. Preferably, s is greater than or equal to 0.01.

[0065] In the second embodiment of the pressure regulating system control method provided by the present invention, the pressure regulating system is the pressure regulating system of the above-mentioned embodiment 2, and the pressure regulating system control method further includes: detecting the instantaneous pressure value of the fluid inlet 100, opening the first cut-off valve 3 to the second predetermined opening value; opening the second cut-off valve 60 and the third cut-off valve 70; opening the automatic valve 2; and opening the first cut-off valve 3 to the maximum opening. Since the second cut-off valve 60 and the third cut-off valve 70 are provided to share the pressure in the first cut-off valve 3, in this embodiment, the first cut-off valve 3 can be directly opened to the predetermined opening a, and then after opening the automatic valve, the first cut-off valve 3 is slowly opened to be fully opened.

[0066] In the third embodiment provided by the present invention, since a PID adjustment module is provided in the automatic valve, the automatic valve is opened directly after the first shut-off valve 3 is fully opened, and the opening of the automatic valve is determined to be a through PID adjustment, and the automatic valve is further slowly opened to the maximum opening.

[0067] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0068] In the first embodiment provided by the present invention, Figure 1 and Figure 2As shown, the pressure regulating system provided by the present invention comprises a fluid inlet 100 and a fluid outlet 200, wherein the pressure regulating system further comprises: a pressure regulating circuit 1, wherein both ends of the pressure regulating circuit 1 are respectively connected to the fluid inlet 100 and the fluid outlet 200; an automatic valve 2, which is arranged at the inlet end of the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1; a first cut-off valve 3, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, wherein the inlet end of the first cut-off valve 3 is connected to the fluid inlet 100; and a pressure regulating assembly 4, which is arranged on the pressure regulating circuit 1 and is connected to the pressure regulating circuit 1, wherein the pressure regulating assembly 4 is located at one end of the automatic valve 2 away from the first cut-off valve 3. By arranging the first cut-off valve 3 and the automatic valve 2 on the pressure regulating circuit 1, after receiving the pressure regulating instruction, the openings of the first cut-off valve 3 and the automatic valve 2 are respectively adjusted to adapt to the change of the fluid pressure in the pressure regulating circuit, which can protect the subsequent pressure regulating assembly 4, and the fluid will not directly rush into the pressure regulating assembly 4 to cause damage to components, especially the pressure regulating valve in the pressure regulating assembly 4, and such arrangement prolongs the service life of the pressure regulating valve.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A voltage regulation system control method, applicable to a voltage regulation system, It is characterized in that The pressure regulating system comprises a fluid inlet (100) and a fluid outlet (200), and the pressure regulating system further comprises: A pressure regulating circuit (1), wherein two ends of the pressure regulating circuit (1) are respectively connected to the fluid inlet (100) and the fluid outlet (200); An automatic valve (2) is arranged at the inlet end of the pressure regulating circuit (1) and is in communication with the pressure regulating circuit (1), wherein a PID regulating module is arranged in the automatic valve (2); a first cut-off valve (3), arranged on the pressure regulating circuit (1) and connected to the pressure regulating circuit (1), wherein an inlet end of the first cut-off valve (3) is connected to the fluid inlet (100); a pressure regulating assembly (4), arranged on the pressure regulating circuit (1) and in communication with the pressure regulating circuit (1), the pressure regulating assembly (4) being located at an end of the automatic valve (2) away from the first shut-off valve (3); Wherein, the voltage regulation system control method comprises: adjusting the first cut-off valve (3) to a first predetermined opening value; Open the automatic valve (2); Continue to open the first shut-off valve (3) to the maximum opening; After receiving the pressure regulation instruction, the openings of the first cut-off valve (3) and the automatic valve (2) are adjusted respectively to adapt to the change of the fluid pressure in the pressure regulation circuit (1).

2. The voltage regulation system control method according to claim 1, It is characterized in that The method for obtaining the first predetermined opening value includes: After receiving the pressure adjustment instruction, detecting the instantaneous pressure value of the fluid at the fluid inlet (100), and detecting the current opening value of the first shut-off valve (3); Comparing the instantaneous pressure value with a pressure threshold value preset in the system, and when the instantaneous pressure value is within the pressure threshold range, using an interpolation method to determine the allowable opening value of the first shut-off valve (3) corresponding to the instantaneous pressure value for allowing fluid to pass through; The current opening value is compared with the allowable opening value. When the difference between the current opening value and the allowable opening value is less than or equal to a preset difference ratio, the current opening value is the first predetermined opening value.

3. The voltage regulation system control method according to claim 1, It is characterized in that The voltage regulation system control method further includes: After the first shut-off valve (3) operates at a first predetermined opening value for a predetermined period of time; The first shut-off valve (3) is opened to the maximum opening.

4. The voltage regulation system control method according to claim 1, It is characterized in that The voltage regulating system also includes: A safety circuit (5) is arranged at the outlet end of the pressure regulating circuit (1), and the safety circuit (5) is connected to the pressure regulating circuit (1); The safety circuit (5) is provided with a protection valve, and the protection valve is in communication with the safety circuit (5).

5. The voltage regulation system control method according to claim 4, It is characterized in that The protection valve comprises a safety valve (510) and a first vent valve (520); the safety circuit (5) comprises a first branch (51) and a second branch (52) arranged in parallel; the first branch (51) is provided with a safety valve (510), and the second branch (52) is provided with a first vent valve (520); the safety circuit (5) further comprises: A first converging trunk line (53), wherein an inlet end of the first converging trunk line (53) is connected to the pressure regulating circuit (1), and an outlet end of the first converging trunk line (53) is respectively connected to the first branch line (51) and the second branch line (52).

6. The voltage regulation system control method according to claim 5, It is characterized in that The safety circuit (5) further comprises: a second converging trunk (54), wherein an inlet end of the second converging trunk (54) is respectively connected to the first branch (51) and the second branch (52), and an outlet end of the second converging trunk (54) is connected to the fluid inlet (100); A third branch (55), wherein two ends of the third branch (55) are respectively connected to the second converging trunk (54) and the pressure regulating circuit (1), and a second vent valve (550) is provided on the third branch (55).

7. The voltage regulation system control method according to any one of claims 1, It is characterized in that The voltage regulating component (4) comprises: a fourth shut-off valve (40), arranged on the pressure regulating circuit (1) and connected to the pressure regulating circuit (1); A pressure regulating pipeline (41), the pressure regulating pipeline (41) being arranged in parallel with the pressure regulating circuit (1), and the two ends of the pressure regulating pipeline (41) being respectively connected to the fourth shut-off valve (40) and the pressure regulating circuit (1).

8. The voltage regulation system control method according to claim 7, It is characterized in that The voltage regulating component (4) further comprises: A pressure regulating valve (42) is arranged on the pressure regulating circuit (1), and the pressure regulating valve (42) is located at the outlet end of the fourth shut-off valve (40); A pressure-conducting pipeline (43), the pressure-conducting pipeline (43) being arranged in parallel with the pressure-regulating circuit (1), and the two ends of the pressure-conducting pipeline (43) being respectively connected to the pressure-regulating valve (42) and the pressure-regulating circuit (1); The outlet end of the pressure regulating pipeline (41) is located at the fluid outlet side of the pressure-guiding pipeline (43).

9. The voltage regulation system control method according to claim 8, It is characterized in that There are a plurality of pressure regulating valves (42), and the plurality of pressure regulating valves (42) are sequentially arranged on the pressure regulating circuit (1) along the flow direction of the fluid; There are a plurality of the pressure-conducting pipelines (43), and the plurality of the pressure-conducting pipelines (43) are arranged in a one-to-one correspondence with the plurality of the pressure-regulating valves (42).

10. The voltage regulation system control method according to claim 9, It is characterized in that The plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid, and the plurality of pressure-conducting pipelines (43) include a first pressure-conducting pipeline (431) and a second pressure-conducting pipeline (432); The first pressure-conducting pipeline (431) is in communication with the first pressure-regulating valve (421), and the second pressure-conducting pipeline (432) is in communication with the second pressure-regulating valve (422); The outlet end of the first pressure-leading pipeline (431) is located at the fluid outlet side of the second pressure-leading pipeline (432), and the outlet end of the pressure-regulating pipeline (41) is located at the fluid outlet side of the first pressure-leading pipeline (431).

11. The voltage regulation system control method according to claim 9, It is characterized in that The multiple pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) which are arranged in sequence along the flow direction of the fluid, and the multiple pressure-conducting pipelines (43) include a first pressure-conducting pipeline (431) and a second pressure-conducting pipeline (432); The first pressure-conducting pipeline (431) is in communication with the first pressure-regulating valve (421), and the second pressure-conducting pipeline (432) is in communication with the second pressure-regulating valve (422); The outlet end of the first pressure-leading pipeline (431) is located at the fluid inlet side of the second pressure-regulating valve (422), and the outlet end of the pressure-regulating pipeline (41) is located at the fluid outlet side of the second pressure-leading pipeline (432).

12. The voltage regulation system control method according to claim 9, It is characterized in that The plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid, and the plurality of pressure-conducting pipelines (43) include a first pressure-conducting pipeline (431) and a second pressure-conducting pipeline (432); The first pressure-conducting pipeline (431) is in communication with the first pressure-regulating valve (421), and the second pressure-conducting pipeline (432) is in communication with the second pressure-regulating valve (422); The outlet end of the first pressure-leading pipeline (431) is located at the fluid inlet side of the second pressure-regulating valve (422), and the outlet end of the pressure-regulating pipeline (41) is located between the outlet end of the first pressure-leading pipeline (431) and the inlet end of the second pressure-regulating valve (422).

13. The voltage regulation system control method according to claim 9, It is characterized in that There are a plurality of the fourth shutoff valves (40), which are arranged in sequence along the flow direction of the fluid; there are a plurality of the pressure regulating pipelines (41), which are arranged in a one-to-one correspondence with the plurality of the fourth shutoff valves (40).

14. The voltage regulation system control method according to claim 13, It is characterized in that The plurality of fourth shut-off valves (40) include a first unit shut-off valve (401) and a second unit shut-off valve (402) arranged in sequence along the flow direction of the fluid; the plurality of pressure regulating pipelines (41) include a first pressure regulating pipeline (411) and a second pressure regulating pipeline (412); the first pressure regulating pipeline (411) is connected to the first unit shut-off valve (401), and the second pressure regulating pipeline (412) is connected to the second unit shut-off valve (402); The plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid, and the plurality of pressure-conducting pipelines (43) include a first pressure-conducting pipeline (431) and a second pressure-conducting pipeline (432); The first pressure-conducting pipeline (431) is in communication with the first pressure-regulating valve (421), and the second pressure-conducting pipeline (432) is in communication with the second pressure-regulating valve (422); The outlet end of the first pressure-leading pipeline (431) is located at the fluid inlet side of the second pressure-regulating valve (422), the outlet end of the second pressure-regulating pipeline (412) is located between the fluid outlet side of the first pressure-leading pipeline (431) and the fluid inlet side of the second pressure-regulating valve (422), and the outlet end of the first pressure-regulating pipeline (411) is located at the fluid outlet side of the second pressure-leading pipeline (432).

15. A pressure regulating system control method, applicable to a pressure regulating system, wherein the pressure regulating system comprises a fluid inlet (100) and a fluid outlet (200), It is characterized in that The voltage regulating system also includes: A pressure regulating circuit (1), wherein two ends of the pressure regulating circuit (1) are respectively connected to the fluid inlet (100) and the fluid outlet (200); An automatic valve (2) is arranged at the inlet end of the pressure regulating circuit (1) and is in communication with the pressure regulating circuit (1), wherein a PID regulating module is arranged in the automatic valve (2); a first cut-off valve (3), arranged on the pressure regulating circuit (1) and connected to the pressure regulating circuit (1), wherein an inlet end of the first cut-off valve (3) is connected to the fluid inlet (100); a pressure regulating assembly (4), arranged on the pressure regulating circuit (1) and in communication with the pressure regulating circuit (1), the pressure regulating assembly (4) being located at an end of the automatic valve (2) away from the first shut-off valve (3); a first inflow branch (6) arranged in parallel with the pressure regulating circuit (1), wherein both ends of the first inflow branch (6) are respectively connected to the pressure regulating circuit (1), an inlet end of the first inflow branch (6) is located at a fluid inlet side of the first shut-off valve (3), and an outlet end of the first inflow branch (6) is located between the first shut-off valve (3) and the automatic valve (2); a second inflow branch (7) arranged in parallel with the pressure regulating circuit (1), wherein both ends of the second inflow branch (7) are respectively connected to the pressure regulating circuit (1), an inlet end of the second inflow branch (7) is located between the first shut-off valve (3) and the automatic valve (2), and an outlet end of the second inflow branch (7) is located at a fluid outlet side of the automatic valve (2); a second shutoff valve (60), arranged on the first inflow branch (6) and in communication with the first inflow branch (6); a third shutoff valve (70), arranged on the second inflow branch (7) and in communication with the second inflow branch (7); The voltage regulation system control method comprises: Detecting the instantaneous pressure value of the fluid inlet (100), and opening the first shut-off valve (3) to a second predetermined opening value; Opening the second shut-off valve (60) and the third shut-off valve (70); Open the automatic valve (2); The first shut-off valve (3) is opened to the maximum opening.

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