CN111379874A

CN111379874A - Pressure regulating system

Info

Publication number: CN111379874A
Application number: CN202010238653.9A
Authority: CN
Inventors: 张航宇; 张迪; 杨建新; 邵若时; 熊跃春
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-07-07

Abstract

The invention provides a pressure regulating system. The pressure regulating system is used for adjusting the fluid pressure in the pipeline, and the pressure regulating system includes: the pressure detection device is arranged on the pipeline and used for detecting the pressure of the fluid in the pipeline; the regulating valve is arranged in the pipeline, and the flow and/or the flow speed of the fluid in the pipeline are/is regulated by regulating the position of a valve core of the regulating valve, so that the pressure of the fluid in the pipeline is regulated; and the driving assembly is provided with a driving part connected with the valve core, and the driving part is telescopically arranged so as to control the driving part to move according to the detection result of the pressure detection device and adjust the position of the valve core. The invention effectively solves the problem that the labor intensity of workers is increased because the machine needs to be stopped to release pressure when pressure fluctuation occurs in the pipeline in the prior art.

Description

Pressure regulating system

Technical Field

The invention relates to the technical field of pressure regulating equipment, in particular to a pressure regulating system.

Background

At present, when fluid circulates in a pipeline, a turbulent phenomenon always occurs, so that the pressure of the fluid in the pipeline fluctuates continuously, for a low-pressure pipeline, the pressure fluctuation in the pipeline is easy to cause the phenomenon of pipeline water leakage or water splashing, and for a medium-high pressure pipeline (such as a 16MPa or 25MPAa pipeline), the pressure fluctuation in the pipeline is easy to cause the phenomenon of pipe explosion, so that certain hidden danger is caused to the personal safety of workers.

However, in the prior art, when a worker finds that the pressure in the pipeline fluctuates, the shutdown pressure relief is usually performed, which not only increases the labor intensity of the worker, but also affects the normal use of the pipeline.

Disclosure of Invention

The invention mainly aims to provide a pressure regulating system to solve the problem that in the prior art, when pressure fluctuation occurs in a pipeline, the pressure needs to be stopped to release pressure, so that the labor intensity of workers is increased.

In order to achieve the above object, the present invention provides a pressure regulating system for regulating a fluid pressure in a pipe, the pressure regulating system comprising: the pressure detection device is arranged on the pipeline and used for detecting the pressure of the fluid in the pipeline; the regulating valve is arranged in the pipeline, and the flow and/or the flow speed of the fluid in the pipeline are/is regulated by regulating the position of a valve core of the regulating valve, so that the pressure of the fluid in the pipeline is regulated; and the driving assembly is provided with a driving part connected with the valve core, and the driving part is telescopically arranged so as to control the driving part to move according to the detection result of the pressure detection device and adjust the position of the valve core.

Furthermore, the valve body of the regulating valve is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are both communicated with the pipeline, the valve core is provided with a liquid through cavity communicated with the liquid inlet channel, and the valve core is also provided with a liquid outlet hole communicated with the liquid through cavity, so that when the valve core is driven by the driving assembly to move along the first preset direction or the second preset direction, the communication area between the liquid outlet hole and the liquid outlet channel is adjusted, and the flow and/or the flow speed of fluid in the pipeline are/is adjusted.

Furthermore, the liquid outlet holes are multiple and are arranged at intervals along the circumferential direction and/or the axial direction of the valve core.

Furthermore, the liquid outlet hole is one and is arranged towards the liquid outlet channel.

Furthermore, the valve body is provided with a mounting hole for mounting the valve core, the mounting hole is communicated with the liquid inlet channel and the liquid outlet channel, a first limiting portion is arranged on the hole wall of the mounting hole, a second limiting portion is arranged on the valve core, and the first limiting portion and the second limiting portion limit the stop so as to limit the rotation of the valve core around the axis of the valve core.

Further, the drive assembly includes: and a piston rod of the piston cylinder is connected with the valve core so as to drive the valve core to move along a first preset direction or a second preset direction when the piston rod moves telescopically.

Further, the driving assembly further includes: the control valve comprises a first working flow port and a second working flow port, the first working flow port is communicated with the rodless cavity of the piston cylinder, and the second working flow port is communicated with the rod cavity of the piston cylinder so as to control the telescopic motion of the piston rod through the control valve.

Further, the control valve is provided with an initial station, a first working station and a second working station, and comprises a flow supply port and a return port; when the control valve is positioned at an initial station, the flow supply port is communicated with the first working flow port, the return port is communicated with the second working flow port, and a passage between the flow supply port and the first working flow port is communicated with a passage between the return ports; when the control valve is positioned at a first working station, the flow supply port is communicated with the first working flow port, and the return port is communicated with the second working flow port, so that the piston rod extends out; when the control valve is positioned at a second working position, the flow supply port is communicated with the second working flow port, and the return port is communicated with the first working flow port, so that the piston rod retracts.

Furthermore, the control valve is an electromagnetic valve, so that the control valve is positioned at the first working position or the second working position by controlling the power-on state of the electromagnetic valve.

Further, the pressure regulating system still includes: the first check valve is arranged on a fluid pipeline between the first working flow port and the rodless cavity, and an inlet of the first check valve is communicated with the first working flow port; and/or a second one-way valve arranged on a fluid pipeline between the second working flow port and the rod cavity, wherein an inlet of the second one-way valve is communicated with the second working flow port.

By applying the technical scheme of the invention, when the pressure detection device detects that the pressure value in the pipeline is inconsistent with the preset pressure value, the driving assembly is started, the driving part of the driving assembly performs telescopic motion to drive the valve core of the regulating valve to move, so that the flow of the fluid in the pipeline is regulated to regulate the pressure of the fluid in the pipeline until the pressure value detected by the pressure detection device is consistent with the preset pressure value. Like this, pressure regulating system in this application can prevent to produce great pressure fluctuation in the pipeline and influence the normal use of pipeline, and then need shut down the pressure release and increased staff intensity of labour's problem when taking place the pressure fluctuation in the pipeline among the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a connection diagram of an embodiment of a pressure regulating system according to the present invention to a pipeline;

FIG. 2 shows a cross-sectional view of a regulator valve of the pressure regulating system of FIG. 1; and

fig. 3 shows a connection diagram of a control valve of the pressure regulating system of fig. 1 to a piston cylinder.

Wherein the figures include the following reference numerals:

10. a pressure detection device; 20. adjusting a valve; 21. a valve body; 211. a liquid inlet channel; 212. a liquid outlet channel; 22. a valve core; 221. a liquid outlet hole; 31. a control valve; 32. a piston cylinder; 321. a piston rod; 322. a cylinder body; 323. a rodless cavity; 324. a rod cavity; 33. a first check valve; 34. a second one-way valve; 40. a pipeline; 50. a meter; 60. a flow meter.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the labor intensity of workers is increased due to the fact that shutdown pressure relief is needed when pressure fluctuation occurs in a pipeline in the prior art, the application provides a pressure regulating system.

As shown in fig. 1 and 2, a pressure regulating system for regulating the pressure of a fluid in a line 40 includes a pressure detecting device 10, a regulating valve 20, and a driving assembly. Wherein the pressure detection device 10 is arranged on the line 40 for detecting the fluid pressure in the line 40. The regulator valve 20 is disposed in the line 40 to regulate the flow and/or velocity of the fluid in the line 40 by adjusting the position of the spool 22 of the regulator valve 20, thereby regulating the pressure of the fluid in the line 40. The driving assembly has a driving part connected with the valve core 22, and the driving part is telescopically arranged to control the driving part to move according to the detection result of the pressure detection device 10 so as to adjust the position of the valve core 22.

By applying the technical scheme of this embodiment, when the pressure detection device 10 detects that the pressure value in the pipeline 40 is inconsistent with the preset pressure value, the driving assembly is started, and the driving portion of the driving assembly performs telescopic motion to drive the valve core 22 of the regulating valve 20 to move, so as to adjust the flow rate of the fluid in the pipeline 40, so as to adjust the fluid pressure in the pipeline 40 until the pressure value detected by the pressure detection device 10 is consistent with the preset pressure value. Thus, the pressure regulating system in the embodiment can prevent the normal use of the pipeline 40 from being affected by large pressure fluctuation generated in the pipeline 40, and further solve the problem that the labor intensity of workers is increased due to the fact that the shutdown pressure release is needed when the pressure fluctuation occurs in the pipeline 40 in the prior art.

In the present embodiment, the pressure detection device 10 is a pressure sensor. When the detection value of the pressure sensor is smaller than the preset pressure value, the driving assembly drives the valve plug 22 to move along a first preset direction so as to reduce the flow rate and/or flow velocity of the fluid in the pipeline 40 and further increase the fluid pressure in the pipeline 40; when the detection value of the pressure sensor is greater than the preset pressure value, the driving assembly drives the valve plug 22 to move along a second preset direction so as to increase the flow rate and/or flow velocity of the fluid in the pipeline 40, and further reduce the pressure of the fluid in the pipeline 40.

As shown in fig. 2, the valve body 21 of the regulating valve 20 has a liquid inlet channel 211 and a liquid outlet channel 212, the liquid inlet channel 211 and the liquid outlet channel 212 are both communicated with the pipeline 40, the valve core 22 has a liquid through cavity communicated with the liquid inlet channel 211, and the valve core 22 further has a liquid outlet hole 221 communicated with the liquid through cavity, so that when the driving assembly drives the valve core 22 to move along the first preset direction or the second preset direction, the communication area of the liquid outlet hole 221 and the liquid outlet channel 212 is adjusted, so as to adjust the flow rate and/or the flow velocity of the fluid in the pipeline 40. Thus, the valve core 22 moves along the first preset direction or the second preset direction to adjust the communication area between the liquid outlet hole 221 and the liquid outlet channel 212, and further adjust the liquid passing ratio between the liquid inlet channel 211 and the liquid outlet channel 212, thereby achieving the purpose of increasing or decreasing the pressure.

Specifically, when the detection value of the pressure detection device 10 is smaller than the preset pressure value, the driving portion drives the valve element 22 to move in the first preset direction (downward) to reduce the communication area between the liquid passing cavity and the liquid outlet channel 212, so as to reduce the amount of fluid discharged from the liquid outlet channel 212 and increase the fluid pressure in the pipeline 40. When the detection value of the pressure detection device 10 is greater than the preset pressure value, the driving portion drives the valve plug 22 to move along the second preset direction (upward) so as to increase the communication area between the liquid through cavity and the liquid outlet channel 212, thereby increasing the amount of fluid discharged from the liquid outlet channel 212 and reducing the fluid pressure in the pipeline 40.

In this embodiment, one end of the liquid inlet channel 211 is connected to the pipeline 40, and one end of the liquid outlet channel 212 is connected to the pipeline 40. Because the pressure regulating system is mainly used for regulating the fluid pressure in the middle and high pressure pipelines, the wall thickness of the liquid inlet channel 211 and the liquid outlet channel 212 is thicker, and the normal use of the pressure regulating system is prevented from being influenced by the structural damage of the regulating valve 20.

Optionally, the liquid outlet holes 221 are multiple, and the multiple liquid outlet holes 221 are arranged at intervals along the circumferential direction and/or the axial direction of the valve core 22. In the present embodiment, the plurality of liquid outlet holes 221 are spaced in the circumferential direction and the axial direction of the spool 22. When the valve core 22 moves up and down in the valve body 21, the arrangement can adjust the communication area between the liquid through cavity and the liquid outlet channel 212, and further adjust the pressure of the fluid discharged from the liquid outlet channel 212, so that the adjusting valve 20 can adjust the pressure of the fluid in the pipeline 40 more easily and conveniently, and the adjusting difficulty is reduced.

In other embodiments not shown in the drawings, there is one outlet opening, which is arranged towards the outlet channel. Therefore, the valve core is simpler and easier in structure due to the arrangement, and the processing cost of the regulating valve is reduced.

In this embodiment, the valve body 21 has a mounting hole for mounting the valve core 22, the mounting hole is communicated with both the liquid inlet channel 211 and the liquid outlet channel 212, a first limiting portion is disposed on a hole wall of the mounting hole, a second limiting portion is disposed on the valve core 22, and the first limiting portion and the second limiting portion limit the stop so as to limit the rotation of the valve core 22 around the axis thereof. Like this, at the in-process that drive part driven valve core 22 moved along first direction of predetermineeing or the second direction of predetermineeing, first spacing portion can avoid valve core 22 to rotate around its axis direction with the spacing backstop of the spacing portion of second, and then has promoted valve core 22's operational reliability.

Optionally, the first limiting portion is a protrusion, the second limiting portion is a groove, and the protrusion extends into the groove and is limited and stopped by a groove wall of the groove.

As shown in fig. 3, the drive assembly includes a piston cylinder 32. Wherein, the piston rod 321 of the piston cylinder 32 is connected with the valve core 22 so as to drive the valve core 22 to move along the first preset direction or the second preset direction when the piston rod 321 extends and retracts. Thus, when the regulator valve 20 is required to adjust the fluid pressure in the line 40, the operator activates the piston cylinder 32 to move the piston rod 321 of the piston cylinder 32 to move the valve spool 22 to adjust the fluid pressure in the line 40.

Specifically, a piston rod 321 is movably disposed in a cylinder 322, and an inner cavity of the cylinder 322 is divided into a rod chamber 324 and a rod-less chamber 323.

Alternatively, the piston rod 321 is detachably connected to the spool 22. In this embodiment, the piston rod 321 is screwed to the valve core 22, so that the two are easier and simpler to disassemble and replace, and the operation difficulty of the worker is reduced.

As shown in fig. 3, the drive assembly further comprises a control valve 31. Wherein the control valve 31 comprises a first working fluid port communicating with the rodless chamber 323 of the piston cylinder 32 and a second working fluid port communicating with the rod chamber 324 of the piston cylinder 32 for controlling the telescopic movement of the piston rod 321 through the control valve 31. Therefore, when the operator needs to operate the regulating valve 20 and the piston cylinder 32, the operator can operate the piston cylinder 32 only by operating the control valve 31, and the operation difficulty of the operator is reduced.

As shown in fig. 3, the control valve 31 has an initial position, a first working position, and a second working position, and the control valve 31 includes a supply port and a return port. When the control valve 31 is in the initial station, the flow supply port is communicated with the first working flow port, the return port is communicated with the second working flow port, and a passage between the flow supply port and the first working flow port is communicated with a passage between the return ports; when the control valve 31 is in the first working position, the supply port is communicated with the first working flow port, and the return port is communicated with the second working flow port, so that the piston rod 321 extends out; when the control valve 31 is in the second working position, the supply port communicates with the second working flow port, and the return port communicates with the first working flow port, so that the piston rod 321 is retracted. Like this, through the station of adjustment control valve 31 to operate piston rod 321, and then make the staff to the operation of piston cylinder 32 easier, simple and convenient, reduced the operation degree of difficulty.

Specifically, when the detection value of the pressure detection device 10 is consistent with the preset pressure value, the control valve 31 is in the initial position, and the piston rod 321 of the piston cylinder 32 does not extend or contract. When the detection value of the pressure detection device 10 is smaller than the preset pressure value, the control valve 31 is in the first working position, the piston rod 321 extends to drive the valve core 22 to move along the first preset direction, so as to reduce the communication area between the fluid passage chamber and the fluid outlet channel 212, further reduce the amount of fluid discharged from the fluid outlet channel 212, and increase the fluid pressure in the pipeline 40. When the detection value of the pressure detection device 10 is greater than the preset pressure value, the control valve 31 is in the second working position, the piston rod 321 retracts to drive the valve core 22 to move along the second preset direction, so as to increase the communication area between the liquid through cavity and the liquid outlet channel 212, further increase the amount of fluid discharged from the liquid outlet channel 212, and reduce the fluid pressure in the pipeline 40.

In the present embodiment, the control valve 31 is a solenoid valve, so that the control valve 31 is in the first working position or the second working position by controlling the energization state of the solenoid valve. As shown in fig. 1, the pressure regulating system further includes a meter 50 to set a preset pressure value by the meter 50. Specifically, when the detection value of the pressure detection device 10 is smaller than the preset pressure value (16MPa or 25MPa), the worker presses the switch SB1, the left side of the solenoid valve is powered on, the solenoid valve is in the first working position, and the piston rod 321 extends out to drive the valve core 22 to move downward to increase the fluid pressure in the pipeline 40. When the pressure of the pipeline reaches a preset pressure value, the two sides of the electromagnetic valve are not powered and are positioned at a middle position (an initial station), the piston rod 321 is not moved, and the pressure in the pipeline is not changed. When the detection value of the pressure detection device 10 is greater than the preset pressure value (16MPa or 25MPa), the worker presses the switch SB2, the right side of the solenoid valve is powered on, the solenoid valve is in the second working position, and the piston rod 321 retracts to drive the valve core 22 to move upwards, so as to reduce the fluid pressure in the pipeline 40. When the pressure of the pipeline reaches a preset pressure value, the two sides of the electromagnetic valve are not powered and are positioned at a middle position (an initial station), the piston rod 321 is not moved, and the pressure in the pipeline is not changed.

As shown in fig. 3, the pressure regulating system further includes a first check valve 33 and a second check valve 34. Wherein a first check valve 33 is provided on the fluid line between the first working fluid port and the rodless chamber 323, and an inlet of the first check valve 33 communicates with the first working fluid port. A second one-way valve 34 is disposed in the fluid line between the second working fluid port and the rod chamber 324, with an inlet of the second one-way valve 34 communicating with the second working fluid port. Thus, the first check valve 33 and the second check valve 34 are arranged to avoid liquid backflow in the hydraulic circuit, and the operation reliability of the pressure regulating system is improved.

As shown in fig. 1, the pressure regulation system further includes a flow meter 60. Wherein a flow meter 60 is provided in the line 40 to detect the flow rate in the line 40.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

when the pressure detection device detects that the pressure value in the pipeline is inconsistent with the preset pressure value, the driving assembly is started, the driving part of the driving assembly performs telescopic motion to drive the valve core of the regulating valve to move, and then the flow of fluid in the pipeline is adjusted to adjust the fluid pressure in the pipeline until the pressure value detected by the pressure detection device is consistent with the preset pressure value. Like this, pressure regulating system in this application can prevent to produce great pressure fluctuation in the pipeline and influence the normal use of pipeline, and then need shut down the pressure release and increased staff intensity of labour's problem when taking place the pressure fluctuation in the pipeline among the prior art.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure regulating system for regulating fluid pressure in a line (40), the pressure regulating system comprising:

a pressure detection device (10), said pressure detection device (10) being arranged on said line (40) for detecting a fluid pressure within said line (40);

the regulating valve (20) is arranged in the pipeline (40) and is used for regulating the flow and/or the flow speed of the fluid in the pipeline (40) by regulating the position of a valve core (22) of the regulating valve (20), so that the pressure of the fluid in the pipeline (40) is regulated;

the driving assembly is provided with a driving part connected with the valve core (22), and the driving part is telescopically arranged so as to control the driving part to move according to the detection result of the pressure detection device (10) to adjust the position of the valve core (22).

2. The pressure regulating system according to claim 1, wherein the valve body (21) of the regulating valve (20) is provided with a liquid inlet channel (211) and a liquid outlet channel (212), the liquid inlet channel (211) and the liquid outlet channel (212) are both communicated with the pipeline (40), the valve core (22) is provided with a liquid through cavity communicated with the liquid inlet channel (211), and the valve core (22) is further provided with a liquid outlet hole (221) communicated with the liquid through cavity, so that when the driving assembly drives the valve core (22) to move along a first preset direction or a second preset direction, the communication area of the liquid outlet hole (221) and the liquid outlet channel (212) is adjusted to adjust the flow rate and/or flow velocity of the fluid in the pipeline (40).

3. The pressure regulating system according to claim 2, wherein the liquid outlet holes (221) are plural, and the plural liquid outlet holes (221) are arranged at intervals along a circumferential direction and/or an axial direction of the valve core (22).

4. The pressure regulating system according to claim 2, wherein the outlet hole (221) is one, and the outlet hole (221) is disposed toward the outlet channel (212).

5. The pressure regulating system according to claim 2, wherein the valve body (21) is provided with a mounting hole for mounting the valve core (22), the mounting hole is communicated with the liquid inlet channel (211) and the liquid outlet channel (212), a first limiting part is arranged on the hole wall of the mounting hole, a second limiting part is arranged on the valve core (22), and the first limiting part and the second limiting part limit stop so as to limit the rotation of the valve core (22) around the axis thereof.

6. The pressure regulating system of claim 2, wherein the drive assembly comprises:

the piston rod (321) of the piston cylinder (32) is connected with the valve core (22) so as to drive the valve core (22) to move along the first preset direction or the second preset direction when the piston rod (321) moves telescopically.

7. The pressure regulating system of claim 6, wherein said drive assembly further comprises:

a control valve (31), the control valve (31) comprising a first working flow port in communication with a rodless cavity (323) of the piston cylinder (32) and a second working flow port in communication with a rod cavity (324) of the piston cylinder (32) to control the telescopic movement of the piston rod (321) through the control valve (31).

8. The pressure regulating system of claim 7, wherein the control valve (31) has an initial station, a first work station and a second work station, the control valve (31) comprising a supply port and a return port; when the control valve (31) is in the initial station, the flow supply port is communicated with the first working flow port, the return port is communicated with the second working flow port, and a passage between the flow supply port and the first working flow port is communicated with a passage between the return ports; when the control valve (31) is in the first working position, the flow supply port is communicated with the first working flow port, and the return port is communicated with the second working flow port, so that the piston rod (321) extends out; when the control valve (31) is located at the second working position, the flow supply port is communicated with the second working flow port, and the return port is communicated with the first working flow port, so that the piston rod (321) retracts.

9. The pressure regulating system according to claim 8, wherein the control valve (31) is a solenoid valve, so that the control valve (31) is in the first working position or the second working position by controlling an energization state of the solenoid valve.

10. The pressure regulating system of claim 7, further comprising:

a first one-way valve (33) disposed on a fluid line between the first working fluid port and the rodless chamber (323), an inlet of the first one-way valve (33) communicating with the first working fluid port; and/or

A second one-way valve (34) disposed on a fluid line between the second working fluid port and the rod cavity (324), an inlet of the second one-way valve (34) communicating with the second working fluid port.