CN220506146U - Reciprocating device, pipeline system and fluid pressure pulsation damping device in pipeline - Google Patents

Abstract

The utility model relates to the field of fluid machinery, and discloses reciprocating equipment, a pipeline system and a fluid pressure pulsation damping device in a pipeline. The damping device comprises a barrel, a porous baffle and a perforated pipe, wherein the porous baffle is transversely arranged in a barrel cavity of the barrel, the barrel cavity is axially divided into a first cavity and a second cavity, an air inlet communicated with the first cavity and a fluid outlet communicated with the second cavity are respectively formed in two end walls of the barrel, the perforated pipe is positioned in the first cavity, one end of the perforated pipe is coaxially inserted into the air inlet, a liquid inlet communicated with the first cavity is formed in the peripheral wall of the barrel, and a porous angle nozzle is arranged at the liquid inlet. The damping device can alleviate the pressure pulsation in the gas-liquid two-phase converging process, so that the pressure pulsation of the mixed fluid is damped.

Description

Reciprocating device, pipeline system and fluid pressure pulsation damping device in pipeline

Technical Field

The present utility model relates to the field of fluid machinery, and in particular to a fluid pressure pulsation damping device in a pipe, a pipe system including the damping device, and a reciprocating apparatus including the pipe system.

Background

In the petrochemical industry, surge tanks are commonly employed to attenuate air flow pulsations. However, in a production line, the gas-liquid two-phase and single-phase (gas phase) fluid switching may occur upstream according to the difference of downstream products. At the position of the gas-phase fluid and liquid-phase fluid converging pipeline, under a single-phase working condition, the liquid-phase fluid pipeline is closed, and the gas-phase fluid does not cause serious pressure pulsation; under the working condition of gas and liquid phases, severe pressure pulsation is caused by mixing the two phases to strike the pipe wall to form an excessive exciting force, so that severe pipeline vibration and noise are caused, the rated range is exceeded, and the safe production of the production line is seriously affected. The common buffer tank is not suitable for the gas-liquid two-phase working condition, and the pulsation attenuation effect is poor.

Disclosure of Invention

The utility model aims to solve the problem of serious pressure pulsation caused by gas-liquid two-phase mixing in the prior art.

In order to achieve the above object, according to a first aspect of the present utility model, there is provided a device for attenuating fluid pressure pulsation in a pipe, the attenuating device comprising a cylinder, a porous baffle and a perforated pipe, the porous baffle is transversely disposed in a cylinder cavity of the cylinder and divides the cylinder cavity into a first chamber and a second chamber along an axial direction, an air inlet communicating with the first chamber and a fluid outlet communicating with the second chamber are respectively disposed on two end walls of the cylinder, the perforated pipe is disposed in the first chamber, one end of the perforated pipe is coaxially inserted into the air inlet, a liquid inlet communicating with the first chamber is disposed on a peripheral wall of the cylinder, and a porous angular nozzle is disposed at the liquid inlet.

Through the technical scheme, the gas-phase fluid can carry out pressure pulsation attenuation under the action of the perforated pipe before entering the first chamber, the liquid-phase fluid can be broken into liquid drops from the liquid column under the action of the perforated angle nozzle before entering the first chamber, then the liquid-phase fluid is fully mixed with the gas-phase fluid in the first chamber to form a single-phase-like mixed fluid, the mixed fluid carries out pressure pulsation attenuation under the action of the perforated baffle plate, and then the mixed fluid flows out from the fluid outlet. Therefore, the damping device can alleviate the pressure pulsation in the gas-liquid two-phase converging process, so that the pressure pulsation of the mixed fluid is damped.

Optionally, the volume of the first chamber is greater than the volume of the second chamber.

Optionally, the porous baffle is a concave plate concave towards the second chamber.

Optionally, the cross section of the cylinder is round, and the inner diameter of the cylinder is 4-6 times of the inner diameter of the perforated pipe.

Optionally, the length of the cylinder is 3-4 times of the inner diameter of the cylinder.

Optionally, the aperture of the hole on the perforated pipe is 1/8-1/4 of the inner diameter of the perforated pipe.

Optionally, the hole spacing of the holes on the perforated pipe is 1/5-1/3 of the inner diameter of the perforated pipe.

Optionally, the axial direction of the liquid inlet is perpendicular to the axial direction of the air inlet.

Optionally, the central axes of the air inlet and the fluid outlet are collinear with the central axis of the barrel cavity.

The second aspect of the utility model provides a pipeline system, which comprises an air inlet pipe, a liquid inlet pipe, a mixing pipe and the fluid pressure pulsation damping device in the pipe, wherein the air inlet pipe is coaxially connected with the pipe with holes, the liquid inlet pipe is coaxially inserted into the liquid inlet, and the mixing pipe is coaxially inserted into the fluid outlet.

Through the technical scheme, the pipeline system can attenuate the pressure pulsation of the mixed fluid by adopting the damping device, so that the vibration and noise of the mixing pipe are reduced.

Optionally, the pipeline system further comprises a communicating pipe, the air inlet pipe, the liquid inlet pipe and the communicating pipe are respectively provided with a first automatic control valve, a second automatic control valve and a third automatic control valve for controlling the on-off of the air inlet pipe, the liquid inlet pipe, the second automatic control valve and the third automatic control valve, one end of the communicating pipe is connected with the air inlet pipe at the upstream of the first automatic control valve, and the other end of the communicating pipe is connected with the mixing pipe.

Optionally, the pipeline system further comprises a pressure sensor and a control system, wherein the pressure sensor is arranged at the upstream of the air inlet pipe and used for monitoring the dynamic pressure at the upstream of the air inlet pipe, and the control system is arranged to be capable of receiving the dynamic pressure and controlling the opening and closing of each self-control valve according to the dynamic pressure.

Optionally, the control system comprises a data processing unit and a programmable logic controller, wherein the data processing unit is used for calculating pressure unevenness according to the dynamic pressure, transmitting a maximum pressure unevenness value in a preset time period to the programmable logic controller, and controlling the opening and closing of each self-control valve by the programmable logic controller.

Optionally, the pipeline system further comprises a driving device, and the control system controls the opening and closing of each self-control valve through the driving device.

Optionally, the control system is configured to: under the gas phase working condition, when the pressure non-uniformity is larger than a limiting value, the control system controls the first automatic control valve to be opened, and the second automatic control valve and the third automatic control valve to be closed, so that gas phase fluid flows into the mixing pipe after entering the attenuation device through the gas inlet pipe; when the pressure unevenness is smaller than a limiting value, the control system controls the third automatic control valve to be opened, and the first automatic control valve and the second automatic control valve are closed, so that gas phase fluid flows into the mixing pipe through the communicating pipe;

under the working condition of gas-liquid two phases, the control system controls the first automatic control valve and the second automatic control valve to be opened, and the third automatic control valve is closed, so that gas-phase fluid enters the attenuation device through the air inlet pipe, and liquid-phase fluid enters the attenuation device through the liquid inlet pipe to be mixed with the gas-phase fluid and then flows into the mixing pipe.

A third aspect of the utility model provides a reciprocating apparatus comprising a pipe system as described above.

The fourth aspect of the utility model provides a method for attenuating pressure pulsation in a gas-liquid two-phase flow tube, the method comprising: the liquid phase fluid is broken up into droplets from the liquid column and then thoroughly mixed with the gas phase fluid.

Alternatively, the method is implemented using the fluid pressure pulsation damping device in the pipe described above or the pipe system described above.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate and explain the utility model and are not to be construed as limiting the utility model. In the drawings:

FIG. 1 is a schematic diagram of one embodiment of a piping system according to the present utility model;

FIG. 2 is a front view of the porous barrier of FIG. 1;

FIG. 3 is an axial cross-sectional view of the multi-orifice angle nozzle of FIG. 1;

FIG. 4 is a radial cross-sectional view of the multi-orifice angle nozzle of FIG. 1;

fig. 5 is a graph comparing fluid pressure pulsation in a mixing pipe with and without the damping device according to the present utility model.

Description of the reference numerals

100-pipeline systems, 101-tee joints, 102-flanges, 103-bolt and nut connectors, 104-sealing rings, 110-damping devices, 111-cylinders, 112-porous baffles, 113-first chambers, 114-second chambers, 115-perforated pipes, 120-air inlet pipes, 121-first self-control valves, 130-porous angle-type nozzles, 140-liquid inlet pipes, 141-second self-control valves, 150-mixing pipes, 160-communicating pipes, 161-third self-control valves, 170-pressure sensors, 180-control systems and 190-driving devices.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the drawings and the embodiments. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the utility model and are not intended to limit the scope of the utility model, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality of" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present utility model and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

Furthermore, the use of the terms first, second, and the like in the present application are not used for any order, quantity, or importance, but rather are used for distinguishing between different parts. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.

It should also be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.

All terms used herein have the same meaning as understood by one of ordinary skill in the art to which the present utility model pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

Aiming at the problems that a common buffer tank cannot better attenuate pressure pulsation on gas-liquid two-phase working conditions in the prior art, so that the two phases are mixed to cause serious pressure pulsation to strike the pipe wall to form too high exciting force, serious pipeline vibration and noise are further caused, and the safety production of a production line is seriously affected beyond a rated range, the utility model provides a device for attenuating the pressure pulsation of fluid in the pipe. Referring to fig. 1, the damping device 110 includes a cylinder 111, a porous baffle 112, and a perforated pipe 115, where the porous baffle 112 is transversely disposed in a cylinder cavity of the cylinder 111 and separates the cylinder cavity into a first chamber 113 and a second chamber 114 along an axial direction, two end walls of the cylinder 111 are respectively provided with an air inlet communicated with the first chamber 113 and a fluid outlet communicated with the second chamber 114, the perforated pipe 115 is disposed in the first chamber 113, one end of the perforated pipe is coaxially inserted into the air inlet, a liquid inlet communicated with the first chamber 113 is provided on a peripheral wall of the cylinder 111, and a porous angle nozzle 130 is disposed at the liquid inlet.

In the above, it is understood that the cylinder 111 includes a cylinder chamber, a peripheral wall for defining the cylinder chamber, and two end walls at both axial ends of the cylinder, and the cylinder may be understood as a hollow cylinder. Wherein the cross section of the cylinder cavity can be round, square, etc., and is preferably round, so as to facilitate processing. The porous baffle 112 is a plate-like member having a plurality of holes, and the outer peripheral edge of the porous baffle 112 abuts against the inner wall surface of the cylinder 111 so that the fluid in the first chamber 113 can only enter the second chamber 114 through the holes in the porous baffle 112. Perforated tube 115 is a tube body having a plurality of holes in the wall.

In addition, the porous angular nozzle 130 is a well-known conventional component, and specifically, see the structures shown in fig. 3 to 4, and the structure of the porous angular nozzle is not modified in the present utility model, so the structure of the porous angular nozzle will not be described in detail. When in actual use, the existing nozzle with good atomization effect is selected.

Through the above technical solution, the gas phase fluid can be subjected to pressure pulsation attenuation under the action of the perforated pipe 115 before entering the first chamber 113, the liquid phase fluid can be broken up into droplets from the liquid column under the action of the porous angular nozzle 130 before entering the first chamber 113, then the droplets are fully mixed with the gas phase fluid in the first chamber 113 to form a mixed fluid similar to a single phase, the mixed fluid is subjected to pressure pulsation attenuation under the action of the porous baffle 112, and then flows out from the fluid outlet. Therefore, the damping device can alleviate the pressure pulsation in the gas-liquid two-phase converging process, so that the pressure pulsation of the mixed fluid is damped.

According to the damping device 110, through the arrangement of the perforated pipe 115, the porous baffle 112 and the porous angular nozzle 130, the holes on the perforated pipe 115 can attenuate pressure pulsation of gas-phase fluid entering the perforated pipe, the porous angular nozzle 130 can break up liquid-phase fluid from a liquid column into liquid drops, the gas-phase fluid entering the first chamber 113 and the liquid drops can be fully mixed, then the gas-phase fluid enters the second chamber 114 from the holes on the porous baffle 112, finally, the gas-phase fluid flows out through the fluid outlet, and the holes on the porous baffle 112 can attenuate pressure pulsation of mixed fluid, so that the aim of alleviating the pressure pulsation of the mixed fluid is fulfilled.

In this case, as shown in fig. 1, the volume of the first chamber 113 is larger than the volume of the second chamber 114. It is further preferred that the volume of the first chamber 113 is three-fifths of the total volume of the cartridge chamber. By the arrangement, the gas and the liquid can be mixed more uniformly, and pressure pulsation of the mixed fluid is further reduced.

In this case, as shown in fig. 1, the porous baffle 112 is a concave plate that is concave toward the second chamber 114, i.e., concave along the fluid movement direction, so that the pulsation can be prevented from increasing.

In which, as shown in fig. 2, the porous barrier 112 has a large hole at the center and a plurality of small holes at the outer side of the large hole uniformly spaced in the circumferential direction, so that the fluid can be split into several streams to pass through the large hole and the small hole, respectively, to thereby attenuate pressure pulsation.

In a preferred embodiment, the cross section of the cylinder 111 is circular, the inner diameter of the cylinder 111 is 4 to 6 times, preferably 4 times, the inner diameter of the perforated pipe 115, and the length of the cylinder 111 is 3 to 4 times the inner diameter of the cylinder 111. By the arrangement, the gas and the liquid can be mixed more uniformly, and pressure pulsation of the mixed fluid is further reduced.

In a preferred embodiment, the holes in the perforated pipe 115 have a diameter of 1/8 to 1/4, preferably 1/4, of the inner diameter of the perforated pipe 115, and the holes in the perforated pipe 115 have a hole pitch of 1/5 to 1/3, preferably 1/3, of the inner diameter of the perforated pipe 115. This arrangement can further attenuate the airflow pulsation.

In this case, as shown in fig. 1, the axial direction of the liquid inlet is perpendicular to the axial direction of the air inlet. Through making the axial perpendicular to air inlet of inlet, can make the mixed effect of gas-liquid better, and be convenient for the pipeline installation.

In this case, as shown in fig. 1, the central axes of the air inlet and the fluid outlet are collinear with the central axis of the cylinder chamber as a preferred embodiment.

The damping device 110 of the present utility model applies the principle of horizontal jet liquid atomization and porous acoustic airflow pulsation damping, in use, liquid phase fluid is injected into gas phase fluid cross flow after flowing through the porous angular nozzle 130, the liquid phase fluid is fully atomized and then is mutually dissolved with the gas phase fluid, the liquid phase fluid flows through the porous baffle 112 and then enters the mixing tube (which will be described later), the theoretical basis of the liquid phase fluid atomization is the horizontal jet form, and the liquid is atomized under the combined action of various forces (pressure drop of the porous angular nozzle in the flow field, surface tension and viscous force of the liquid, aerodynamic force from the liquid jet to high-speed airflow). Minimum aperture d of orifice on orifice angle nozzle 130 _n Can be according to d _e ＝(1.5λ/d _n ) ^1/3 d _n Preliminary determination, where λ is the liquid phase fluid wavelength, d _e Is the post-jet droplet diameter.

The second aspect of the present utility model provides a pipeline system, referring to fig. 1, where the pipeline system 100 includes an air inlet pipe 120, a liquid inlet pipe 140, a mixing pipe 150, and an attenuation device 110, the air inlet pipe 120 is coaxially connected to the perforated pipe 115, the liquid inlet pipe 140 is coaxially inserted at the liquid inlet, and the mixing pipe 150 is coaxially inserted at the fluid outlet.

The pipe system 100 of the present utility model may further include a communication pipe 160, a first self-control valve 121, a second self-control valve 141, and a third self-control valve 161 for controlling on/off of the intake pipe 120, the liquid intake pipe 140, and the communication pipe 160 are respectively provided on the intake pipe 120, the liquid intake pipe 140, and the communication pipe 160, one end of the communication pipe 160 is connected to the intake pipe 120 upstream of the first self-control valve 121, and the other end of the communication pipe 160 is connected to the mixing pipe 150.

In use, by controlling the opening and closing of the first self-control valve 121, the second self-control valve 141 and the third self-control valve 161 respectively, different working conditions, such as a gas phase working condition and a gas-liquid two-phase working condition, can be adapted.

Specifically, as shown in the embodiment of fig. 1, the communicating pipe 160 is a U-shaped pipe, the left end of the communicating pipe 160 is connected and communicated with the left end of the air inlet pipe 120 through the tee 101, the left end of the communicating pipe 160 is fixedly connected to one port of the tee 101 through the flange 102 and the plurality of high-pressure connecting bolt-nut connectors 103, and a sealing ring 104 is further disposed between the left end of the communicating pipe 160 and the port. The left end of the air inlet pipe 120 is connected and communicated with the other port of the tee joint 101, the right end of the air inlet pipe 120 is fixedly connected to the left end wall of the cylinder 111 through a flange 102 and a plurality of high-pressure connecting bolt and nut connectors 103, and is in butt joint with the left end of the perforated pipe 115, and a sealing ring 104 is arranged between the left end and the left end. The inlet pipe 140 and the mixing pipe 150 are tightly connected with the cylinder 111 through the flange 102 and a plurality of high-pressure connecting bolt and nut connectors 103, and are sealed through the sealing rings 104. The right end of the communicating pipe 160 is connected and communicated with the right end of the mixing pipe 150 through the tee 101, and the right end of the communicating pipe 160 is tightly connected with one port of the tee 101 through the flange 102 and a plurality of high-pressure connecting bolt and nut connectors 103 and is sealed through the sealing ring 104.

In the present utility model, the inner diameter of the air inlet pipe 120 may be greater than or equal to the inner diameter of the perforated pipe 115. In addition, as shown in fig. 1, the lower end of the inlet pipe 140 may protrude into the first chamber 113, and the porous angular nozzle 130 may be installed in a lumen of the lower end of the inlet pipe 140.

In order to implement automatic control, as shown in fig. 1, the pipe system 100 of the present utility model may further include a pressure sensor 170 and a control system 180, wherein the pressure sensor 170 is disposed upstream of the air inlet pipe 120 for monitoring dynamic pressure upstream of the air inlet pipe 120, and the control system 180 is configured to receive the dynamic pressure and control opening and closing of each self-control valve according to the dynamic pressure.

The control system 180 may include a data processing unit and a Programmable Logic Controller (PLC), where the data processing unit is configured to calculate pressure unevenness according to dynamic pressure, and transmit a maximum pressure unevenness value within a predetermined period of time to the programmable logic controller, and the programmable logic controller controls opening and closing of each of the self-control valves.

As shown in fig. 1, the piping system 100 may further include a driving device 190, and the control system 180 controls the opening and closing of each of the self-control valves through the driving device 190.

Specifically, the control system 180 may convert the opening and closing signals of the respective self-control valves into digital signals and transmit the digital signals to the driving device 190 to control the opening and closing of the self-control valves.

In operation, the pressure sensor 170 monitors the dynamic pressure P upstream of the intake pipe 120 ₁ And transmits the actual time to the control system 180, and the control system 180 calculates the pressure unevenness in real time through the data processing unitAnd then the maximum pressure unevenness value in each hour is transmitted to the PLC, and the control system 180 converts the opening and closing signals of the respective automatic control valves into digital signals and transmits the digital signals to the driving device 190 to control the opening and closing of the automatic control valves.

Specifically, under the gas phase working condition, when the pressure unevenness is greater than the limit value, the control system 180 controls the first self-control valve 121 to be opened, and the second self-control valve 141 and the third self-control valve 161 to be closed, so that the gas phase fluid flows into the mixing pipe 150 after entering the attenuation device 110 through the gas inlet pipe 120; when the pressure unevenness is less than the defined value, the control system 180 controls the third self-control valve 161 to be opened, and the first and second self-control valves 121 and 141 to be closed, so that the gas phase fluid flows into the mixing pipe 150 through the communication pipe 160.

Under the gas-liquid two-phase working condition, the control system 180 controls the first self-control valve 121 and the second self-control valve 141 to be opened, and the third self-control valve 161 to be closed, so that gas-phase fluid enters the attenuation device 110 through the gas inlet pipe 120, and liquid-phase fluid enters the attenuation device 110 through the liquid inlet pipe 140 to be mixed with the gas-phase fluid and then flows into the mixing pipe 150.

Through the technical scheme, the pipeline system 100 not only can attenuate the air flow pulsation under the gas phase working condition, but also can effectively attenuate the pressure pulsation under the gas-liquid two-phase working condition, and can not cause larger pressure loss.

A third aspect of the present utility model provides a reciprocating apparatus comprising the above-described pipe system 100.

The reciprocating equipment of the utility model can be a compressor set, and can also be other reciprocating equipment such as a large-scale mixing and conveying pump with gas-liquid two-phase and gas-state single-phase alternate operation working conditions.

The reciprocating equipment of the utility model can greatly attenuate the fluid pulsation in the pipeline by applying the damping device 110, especially installing the damping device at the position of the T-shaped pipe where the gas phase and the liquid phase are converged, thereby ensuring the safe and stable operation of the equipment.

Compared with the development of the existing compressor and the pulsation attenuation technology, the reciprocating equipment provided by the utility model applies the principles of horizontal jet liquid atomization and porous acoustic airflow pulsation attenuation, and can control whether the attenuation device is used or not by switching the opening and closing of the self-control valve. Under the single-phase working condition, when the upstream pressure non-uniformity is smaller than a limit value, the production line avoids the attenuation device 110 so as not to cause ineffective pressure drop and energy consumption; when the upstream pressure unevenness is greater than the limit value, the gas-phase fluid flowing through the damping device 110 suppresses the excessively high pressure pulsation. Under the two-phase working condition, the pressure pulsation at the converging pipeline is seriously beyond the standard range, the damping device 110 is brought into the production line, the effective damping of the pressure pulsation at the gas-liquid two-phase converging pipeline is realized, the working reliability of the compressor set under the two-phase working condition is improved, the running environment of the compressor is improved, and the pressure drop and the energy consumption under the single-phase working condition are not caused.

The fourth aspect of the utility model provides a method for attenuating pressure pulsation in a gas-liquid two-phase flow tube, comprising the following steps: the liquid phase fluid is broken up into droplets from the liquid column and then thoroughly mixed with the gas phase fluid.

The method described above may be implemented using the apparatus for attenuating fluid pressure pulsation in a pipe provided in the first aspect of the present utility model or the pipe system provided in the second aspect of the present utility model.

In connection with fig. 1, in particular, the method may comprise: under the gas phase working condition, when the pressure non-uniformity is greater than the limiting value, the control system 180 controls the first self-control valve 121 to be opened, and the second self-control valve 141 and the third self-control valve 161 to be closed, so that gas phase fluid flows into the mixing pipe 150 after entering the attenuation device 110 through the gas inlet pipe 120; when the pressure unevenness is less than the defined value, the control system 180 controls the third self-control valve 161 to be opened, and the first and second self-control valves 121 and 141 to be closed, so that the gas phase fluid flows into the mixing pipe 150 through the communication pipe 160; under the gas-liquid two-phase working condition, the control system 180 controls the first self-control valve 121 and the second self-control valve 141 to be opened, and the third self-control valve 161 to be closed, so that gas-phase fluid enters the attenuation device 110 through the gas inlet pipe 120, and liquid-phase fluid enters the attenuation device 110 through the liquid inlet pipe 140 to be mixed with the gas-phase fluid and then flows into the mixing pipe 150.

The utility model not only can attenuate the air flow pulsation under the gas phase working condition, but also can effectively attenuate the pressure pulsation under the gas-liquid two-phase working condition, and does not cause great resistance loss. As shown in the pressure pulsation comparison chart of fig. 5, the pressure unevenness was reduced from 13.3% to 10.0% after the damping device was installed, and the damping device of the present utility model can effectively damp pressure pulsation.

Thus, embodiments of the present utility model have been described in detail. In order to avoid obscuring the concepts of the utility model, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

While certain specific embodiments of the present utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims (11)

1. The utility model provides a fluid pressure pulsation damping device in pipe, its characterized in that, damping device (110) include barrel (111), porous baffle (112) and foraminiferous pipe (115), porous baffle (112) transversely keep off and establish in the barrel cavity of barrel (111), and will the barrel cavity is divided into first cavity (113) and second cavity (114) along the axial, set up respectively on two end walls of barrel (111) with the air inlet of first cavity (113) intercommunication and with the fluid outlet of second cavity (114) intercommunication, foraminiferous pipe (115) are located in first cavity (113) and one end with the coaxial grafting of air inlet, set up on the perisporium of barrel (111) with inlet of first cavity (113) intercommunication, inlet department is provided with porous angular nozzle (130).

2. The in-pipe fluid pressure pulsation damping device according to claim 1, characterized in that the volume of the first chamber (113) is larger than the volume of the second chamber (114) and/or that the porous barrier (112) is a concave plate recessed towards the second chamber (114).

3. The in-tube fluid pressure pulsation damping device according to claim 1, characterized in that the cross section of the cylinder (111) is circular, the inner diameter of the cylinder (111) is 4-6 times the inner diameter of the perforated tube (115), and/or the length of the cylinder (111) is 3-4 times the inner diameter of the cylinder (111).

4. The in-tube fluid pressure pulsation damping device according to claim 1, characterized in that the hole diameter of the hole in the perforated tube (115) is 1/8 to 1/4 of the inner diameter of the perforated tube (115) and/or the hole pitch of the hole in the perforated tube (115) is 1/5 to 1/3 of the inner diameter of the perforated tube (115).

5. A device according to any one of claims 1-4, wherein the inlet has an axial direction perpendicular to the inlet axial direction, and/or

The central axes of the air inlet and the fluid outlet are collinear with the central axis of the cylinder cavity.

6. A pipeline system, characterized in that the pipeline system (100) comprises an air inlet pipe (120), a liquid inlet pipe (140), a mixing pipe (150) and the fluid pressure pulsation damping device in the pipe according to any one of claims 1-5, the air inlet pipe (120) is coaxially connected with the pipe (115) with holes, the liquid inlet pipe (140) is coaxially inserted at the liquid inlet, and the mixing pipe (150) is coaxially inserted at the liquid outlet.

7. The pipeline system according to claim 6, wherein the pipeline system (100) further comprises a communicating pipe (160), the air inlet pipe (120), the liquid inlet pipe (140) and the communicating pipe (160) are respectively provided with a first automatic control valve (121), a second automatic control valve (141) and a third automatic control valve (161) for controlling the on-off of the air inlet pipe, one end of the communicating pipe (160) is connected with the air inlet pipe (120) at the upstream of the first automatic control valve (121), and the other end of the communicating pipe (160) is connected with the mixing pipe (150).

8. The piping system according to claim 7, wherein said piping system (100) further comprises a pressure sensor (170) and a control system (180), said pressure sensor (170) being arranged upstream of said intake pipe (120) for monitoring a dynamic pressure upstream of said intake pipe (120), said control system (180) being arranged to be able to receive said dynamic pressure and to control the opening and closing of each autonomous valve depending on said dynamic pressure.

9. The piping system of claim 8, wherein,

the control system (180) comprises a data processing unit and a programmable logic controller, wherein the data processing unit is used for calculating pressure unevenness according to the dynamic pressure, transmitting a maximum pressure unevenness value in a preset time period to the programmable logic controller, and controlling the opening and closing of each self-control valve by the programmable logic controller; and/or

The pipeline system (100) further comprises a driving device (190), and the control system (180) controls the opening and closing of each self-control valve through the driving device (190).

10. The pipe system according to claim 9, characterized in that the control system (180) is arranged to:

under the gas phase working condition, when the pressure non-uniformity is larger than a limiting value, the control system (180) controls the first automatic control valve (121) to be opened, and the second automatic control valve (141) and the third automatic control valve (161) are closed, so that gas phase fluid flows into the mixing pipe (150) after entering the attenuation device (110) through the gas inlet pipe (120); when the pressure unevenness is smaller than a limit value, the control system (180) controls the third self-control valve (161) to be opened, and the first self-control valve (121) and the second self-control valve (141) are closed, so that gas phase fluid flows into the mixing pipe (150) through the communicating pipe (160);

under the gas-liquid two-phase working condition, the control system (180) controls the first automatic control valve (121) and the second automatic control valve (141) to be opened, the third automatic control valve (161) is closed, so that gas-phase fluid enters the attenuation device (110) through the air inlet pipe (120), and liquid-phase fluid enters the attenuation device (110) through the liquid inlet pipe (140) to be mixed with the gas-phase fluid and then flows into the mixing pipe (150).

11. A reciprocating apparatus comprising a pipe system according to any one of claims 6-10.