Reciprocating device, pipeline system, damping device and method

Abstract

The invention relates to the field of fluid machinery, and discloses reciprocating equipment, a pipeline system and an attenuation device and method. The attenuation device comprises a barrel, a porous baffle and a perforated pipe, the porous baffle is transversely arranged in a barrel cavity of the barrel in a blocking mode, and the barrel cavity is divided into a first cavity and a second cavity in the axial direction by the porous baffle. An air inlet communicated with the first cavity and a fluid outlet communicated with the second cavity are formed in the two end walls of the barrel respectively, the perforated pipe is located in the first cavity, one end of the perforated pipe is coaxially connected with the air inlet in an inserted mode, and a liquid inlet communicated with the first cavity is formed in the peripheral wall of the barrel. And a porous angular nozzle is arranged at the liquid inlet. According to the attenuation device, the pressure pulsation in the gas-liquid two-phase convergence process can be more relieved, and the pressure pulsation of mixed fluid is attenuated.

Description

Technical Field

[0001] The present invention relates to the field of fluid machinery, and in particular to a device for attenuating fluid pressure pulsation in a pipe, a pipeline system including the device, a reciprocating device including the pipeline system, and a method for attenuating pressure pulsation in a gas-liquid two-phase flow pipe. Background Art

[0002] In the field of petrochemicals, buffer tanks are generally used to attenuate gas flow pulsations. However, on a production line, depending on the downstream products, there may be a switch between gas-liquid two-phase and single-phase (gas) fluids upstream. At the confluence of the gas and liquid fluids, under single-phase conditions, the liquid fluid pipeline is closed, and the gas phase fluid often does not cause serious pressure pulsations; under gas-liquid two-phase conditions, the severe pressure pulsations caused by the mixing of the two phases hit the pipe wall to form an excessively high excitation force, which in turn causes severe pipeline vibration and noise, exceeding the rated range, seriously affecting the safe production of the production line. Ordinary buffer tanks are not suitable for gas-liquid two-phase conditions, and the pulsation attenuation effect is poor. Summary of the invention

[0003] The purpose of the present invention is to overcome the serious pressure pulsation problem caused by gas-liquid two-phase mixing existing in the prior art.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a device for attenuating fluid pressure pulsation in a tube, wherein the attenuation device comprises a cylinder, a porous baffle and a perforated tube, wherein the porous baffle is transversely disposed in the cylinder cavity of the cylinder and axially divides the cylinder cavity into a first chamber and a second chamber, and an air inlet connected to the first chamber and a fluid outlet connected to the second chamber are respectively provided on the two end walls of the cylinder, the perforated tube is located in the first chamber and one end of the perforated tube is coaxially plugged with the air inlet, a liquid inlet connected to the first chamber is provided on the peripheral wall of the cylinder, and a porous angular nozzle is provided at the liquid inlet.

[0005] Through the above technical solution, the gas phase fluid can be subjected to pressure pulsation attenuation under the action of the perforated tube before entering the first chamber, and the liquid phase fluid can be broken up into droplets from the liquid column under the action of the porous angle nozzle before entering the first chamber, and then fully mixed with the gas phase fluid in the first chamber to form a single-phase mixed fluid, and the mixed fluid is subjected to pressure pulsation attenuation under the action of the porous baffle, and then flows out from the fluid outlet. Therefore, the attenuation device of the present invention can make the pressure pulsation of the gas-liquid two-phase confluence process more moderate, so that the pressure pulsation of the mixed fluid is attenuated.

[0006] Optionally, the volume of the first chamber is greater than the volume of the second chamber.

[0007] Optionally, the porous baffle is a concave plate recessed toward the second chamber.

[0008] Optionally, the cross section of the cylinder is circular, and the inner diameter of the cylinder is 4 to 6 times the inner diameter of the perforated tube.

[0009] Optionally, the length of the cylinder is 3-4 times the inner diameter of the cylinder.

[0010] Optionally, the diameter of the holes on the perforated tube is 1 / 8 to 1 / 4 of the inner diameter of the perforated tube.

[0011] Optionally, the hole spacing between the holes on the perforated tube is 1 / 5 to 1 / 3 of the inner diameter of the perforated tube.

[0012] Optionally, the axial direction of the liquid inlet is perpendicular to the axial direction of the air inlet.

[0013] Optionally, the central axes of the air inlet and the fluid outlet are colinear with the central axis of the barrel cavity.

[0014] The second aspect of the present invention provides a pipeline system, which includes an air inlet pipe, a liquid inlet pipe, a mixing tube and the above-mentioned in-tube fluid pressure pulsation attenuation device, the air inlet pipe is coaxially connected to the perforated tube, the liquid inlet pipe is coaxially inserted at the liquid inlet, and the mixing tube is coaxially inserted at the fluid outlet.

[0015] Through the above technical solution, the pipeline system adopts the above attenuation device to attenuate the pressure pulsation of the mixed fluid, thereby reducing the vibration and noise of the mixing tube.

[0016] Optionally, the piping system also includes a connecting pipe, and the air intake pipe, the liquid intake pipe and the connecting pipe are respectively provided with a first automatic valve, a second automatic valve and a third automatic valve for controlling their on and off. One end of the connecting pipe is connected to the air intake pipe upstream of the first automatic valve, and the other end of the connecting pipe is connected to the mixing pipe.

[0017] Optionally, the pipeline system also includes a pressure sensor and a control system, the pressure sensor is arranged upstream of the intake pipe to monitor the dynamic pressure upstream of the intake pipe, and the control system is configured to receive the dynamic pressure and control the opening and closing of each automatic control valve according to the dynamic pressure.

[0018] Optionally, the control system includes a data processing unit and a programmable logic controller, the data processing unit is used to calculate the pressure unevenness based on the dynamic pressure, and transmit the maximum pressure unevenness value within a predetermined time period to the programmable logic controller, and the programmable logic controller controls the opening and closing of each automatic control valve.

[0019] Optionally, the pipeline system further includes a driving device, and the control system controls the opening and closing of each automatic control valve through the driving device.

[0020] Optionally, the control system is configured such that: under gas phase working conditions, when the pressure unevenness is greater than a limit value, the control system controls the first automatic control valve to open, and the second automatic control valve and the third automatic control valve to close, so that the gas phase fluid enters the attenuation device through the intake pipe and then flows into the mixing pipe; when the pressure unevenness is less than a limit value, the control system controls the third automatic control valve to open, and the first automatic control valve and the second automatic control valve to close, so that the gas phase fluid flows into the mixing pipe through the connecting pipe;

[0021] Under the gas-liquid two-phase working condition, the control system controls the first automatic control valve and the second automatic control valve to open, and the third automatic control valve to close, so that the gas phase fluid enters the attenuation device through the air inlet pipe, and the liquid phase fluid enters the attenuation device through the liquid inlet pipe and mixes with the gas phase fluid before flowing into the mixing pipe.

[0022] A third aspect of the present invention provides a reciprocating device, comprising the above-mentioned pipeline system.

[0023] A fourth aspect of the present invention provides a method for attenuating pressure pulsations in a gas-liquid two-phase flow tube, the method comprising: first breaking up the liquid phase fluid from a liquid column into liquid droplets, and then fully mixing the droplets with the gas phase fluid.

[0024] Optionally, the method is implemented using the above-mentioned in-pipe fluid pressure pulsation attenuation device or the above-mentioned pipeline system.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention 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 accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of an implementation mode of the pipeline system in the present invention;

[0028] Figure 2 yes Figure 1 Front view of the middle porous baffle;

[0029] Figure 3 yes Figure 1 Axial cross-sectional view of the medium multi-hole angle nozzle;

[0030] Figure 4 yes Figure 1Radial cross-sectional view of the medium multi-hole angle nozzle;

[0031] Figure 5 It is a comparison diagram of fluid pressure pulsation in a mixing tube with and without the attenuation device of the present invention installed.

[0032] Description of Reference Numerals

[0033] 100-pipeline system, 101-tee, 102-flange, 103-bolt and nut connector, 104-sealing ring, 110-attenuation device, 111-cylinder, 112-porous baffle, 113-first chamber, 114-second chamber, 115-perforated tube, 120-inlet pipe, 121-first automatic valve, 130-porous angle nozzle, 140-liquid inlet pipe, 141-second automatic valve, 150-mixing tube, 160-connecting tube, 161-third automatic valve, 170-pressure sensor, 180-control system, 190-driving device. DETAILED DESCRIPTION

[0034] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and embodiments. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0035] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0036] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly perpendicular, but is within the tolerance range. "Parallel" is not strictly parallel, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0038] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0039] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] In view of the problem that ordinary buffer tanks in the prior art cannot effectively attenuate pressure pulsation in gas-liquid two-phase conditions, resulting in severe pressure pulsation caused by the mixing of the two phases hitting the pipe wall to form an excessively high exciting force, thereby causing severe pipeline vibration and noise, which exceeds the rated range and seriously affects the safe production of the production line. In the first aspect, the present invention provides a device for attenuating pressure pulsation of fluid in a pipe. Figure 1 The attenuation device 110 includes a cylinder 111, a porous baffle 112 and a perforated tube 115. The porous baffle 112 is transversely disposed in the cylinder cavity of the cylinder 111, and axially divides the cylinder cavity into a first chamber 113 and a second chamber 114. An air inlet connected to the first chamber 113 and a fluid outlet connected to the second chamber 114 are respectively provided on the two end walls of the cylinder 111. The perforated tube 115 is located in the first chamber 113 and one end of the perforated tube is coaxially plugged with the air inlet. A liquid inlet connected to the first chamber 113 is provided on the peripheral wall of the cylinder 111, and a porous angular nozzle 130 is provided at the liquid inlet.

[0042] In the above, it can be understood that the barrel 111 includes a barrel cavity and a peripheral wall for defining the barrel cavity and two end walls located at both ends of the barrel axially. The barrel can also be understood as a hollow cylinder. Among them, the cross-section of the barrel cavity can be circular, square, etc., preferably circular, for ease of processing. The porous baffle 112 is a plate-like member with multiple holes. The outer peripheral edge of the porous baffle 112 abuts against the inner wall surface of the barrel 111, so that the fluid in the first chamber 113 can only enter the second chamber 114 through the holes on the porous baffle 112. The perforated tube 115 is a tube body with multiple holes on the tube wall.

[0043] In addition, it should be noted that the multi-hole angle nozzle 130 is a well-known existing component, and the details can be found in Figure 3-Figure 4 The structure shown in the figure does not improve the structure of the multi-hole angle nozzle, so the structure of the multi-hole angle nozzle is not described in detail. In actual use, an existing nozzle with good atomization effect can be selected.

[0044] Through the above technical solution, the gas phase fluid can be subjected to pressure pulsation attenuation under the action of the perforated tube 115 before entering the first chamber 113, and the liquid phase fluid can be broken up into droplets from the liquid column under the action of the porous angle nozzle 130 before entering the first chamber 113, and then fully mixed with the gas phase fluid in the first chamber 113 to form a single-phase mixed fluid, and 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 attenuation device of the present invention can make the pressure pulsation of the gas-liquid two-phase confluence process more moderate, so that the pressure pulsation of the mixed fluid is attenuated.

[0045] The attenuation device 110 of the present invention is provided with a perforated tube 115, a porous baffle plate 112 and a porous angular nozzle 130. The holes on the perforated tube 115 can attenuate the pressure pulsation of the gas phase fluid entering therein, and the porous angular nozzle 130 can break up the liquid phase fluid from the liquid column into droplets. The gas phase fluid and the droplets entering the first chamber 113 can be fully mixed, and then enter the second chamber 114 from the holes on the porous baffle plate 112, and finally flow out through the fluid outlet. The holes on the porous baffle plate 112 can attenuate the pressure pulsation of the mixed fluid, thereby achieving the purpose of alleviating the pressure pulsation of the mixed fluid.

[0046] Among them, as a preferred embodiment, Figure 1 As shown, the volume of the first chamber 113 is greater than the volume of the second chamber 114. Further preferably, the volume of the first chamber 113 accounts for three fifths of the total volume of the barrel cavity. This arrangement can make the gas and liquid mix more evenly and further reduce the pressure pulsation of the mixed fluid.

[0047] Among them, as a preferred embodiment, Figure 1As shown, the porous baffle 112 is a concave plate that is concave toward the second chamber 114, that is, the concave direction is along the direction of fluid movement, which can avoid increasing pulsation.

[0048] Among them, as a preferred embodiment, Figure 2 As shown, the porous baffle 112 has a large hole in the center and a plurality of small holes arranged evenly spaced along the circumferential direction outside the large hole, so that the fluid can be divided into several streams passing through the large hole and the small holes respectively, thereby attenuating pressure pulsation.

[0049] Among them, as 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 tube 115, and the length of the cylinder 111 is 3-4 times the inner diameter of the cylinder 111. This arrangement can make the gas and liquid mix more evenly and further reduce the pressure pulsation of the mixed fluid.

[0050] As a preferred embodiment, the diameter of the holes on the perforated tube 115 is 1 / 8 to 1 / 4 of the inner diameter of the perforated tube 115, preferably 1 / 4, and the spacing between the holes on the perforated tube 115 is 1 / 5 to 1 / 3 of the inner diameter of the perforated tube 115, preferably 1 / 3. This arrangement can further attenuate airflow pulsation.

[0051] Among them, as a preferred embodiment, Figure 1 As shown, the axial direction of the liquid inlet is perpendicular to the axial direction of the gas inlet. By making the axial direction of the liquid inlet perpendicular to the axial direction of the gas inlet, the gas-liquid mixing effect can be improved and the pipeline installation is convenient.

[0052] Among them, as a preferred embodiment, Figure 1 As shown, the central axes of the air inlet and the fluid outlet are collinear with the central axis of the barrel cavity.

[0053] The attenuation device 110 of the present invention applies the transverse jet liquid atomization form and the porous acoustic airflow pulsation attenuation principle. When in use, the liquid phase fluid flows through the porous angular nozzle 130 and is injected into the gas phase fluid cross flow. The liquid phase fluid is fully atomized and miscible with the gas phase fluid. After flowing through the porous baffle 112 and being fully miscible, it enters the mixing tube (which will be introduced later). The theoretical basis of the liquid phase fluid atomization is the transverse jet form. The liquid is atomized under the combined action of various forces (the pressure drop through the porous angular nozzle in the flow field, the surface tension and viscosity of the liquid, and the aerodynamic force of the liquid jet to the high-speed airflow). The minimum aperture d of the hole on the porous angular nozzle 130 is n According to d e =(1.5λ / d n ) 1 / 3 d n Preliminary determination, where λ is the wavelength of the liquid phase fluid, d e is the droplet diameter after injection.

[0054] A second aspect of the present invention provides a pipeline system, see Figure 1 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.

[0055] The pipeline system 100 of the present invention may also include a connecting pipe 160, and the first automatic valve 121, the second automatic valve 141 and the third automatic valve 161 for controlling the on-off of the air intake pipe 120, the liquid intake pipe 140 and the connecting pipe 160 are respectively provided. One end of the connecting pipe 160 is connected to the air intake pipe 120 upstream of the first automatic valve 121, and the other end of the connecting pipe 160 is connected to the mixing pipe 150.

[0056] When in use, by controlling the opening and closing of the first automatic control valve 121 , the second automatic control valve 141 and the third automatic control valve 161 respectively, different working conditions, such as gas phase working conditions and gas-liquid two-phase working conditions, can be adapted.

[0057] Specifically, Figure 1 In the embodiment shown, the connecting pipe 160 is a U-shaped pipe, the left end of the connecting 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 connecting pipe 160 is fixedly connected to one of the ports of the tee 101 through the flange 102 and a plurality of high-pressure connecting bolts and nuts 103, and a sealing ring 104 is also provided between the left end of the connecting 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 101, the right end of the air inlet pipe 120 is fixedly connected to the left end wall of the cylinder 111 through the flange 102 and a plurality of high-pressure connecting bolts and nuts 103, and is butted with the left end of the perforated pipe 115, and a sealing ring 104 is provided between the two. The liquid inlet pipe 140 and the mixing pipe 150 are tightly connected to the cylinder 111 through the flange 102 and a plurality of high-pressure connecting bolts and nuts 103, respectively, and are sealed by the sealing ring 104. The right end of the connecting pipe 160 is connected and communicated with the right end of the mixing pipe 150 through a tee 101. The right end of the connecting pipe 160 is tightly connected to one of the ports of the tee 101 through a flange 102 and a plurality of high-pressure connecting bolt and nut connectors 103, and is sealed by a sealing ring 104.

[0058] In the present invention, the inner diameter of the air inlet pipe 120 may be greater than or equal to the inner diameter of the perforated pipe 115. Figure 1 As shown, the lower end of the liquid inlet pipe 140 can extend into the first chamber 113 , and the multi-hole angle nozzle 130 can be installed in the tube cavity at the lower end of the liquid inlet pipe 140 .

[0059] In order to realize automatic control, Figure 1As shown, the pipeline system 100 of the present invention may also include a pressure sensor 170 and a control system 180. The pressure sensor 170 is arranged upstream of the intake pipe 120 to monitor the dynamic pressure upstream of the intake pipe 120. The control system 180 is arranged to receive the dynamic pressure and control the opening and closing of each automatic control valve according to the dynamic pressure.

[0060] Among them, the control system 180 may include a data processing unit and a programmable logic controller (PLC). The data processing unit is used to calculate the pressure unevenness based on the dynamic pressure, and transmit the maximum pressure unevenness value within a predetermined time period to the programmable logic controller, which controls the opening and closing of each automatic control valve.

[0061] like Figure 1 As shown, the pipeline system 100 may further include a driving device 190 , and the control system 180 controls the opening and closing of each automatic control valve through the driving device 190 .

[0062] Specifically, the control system 180 may convert the opening and closing signals of the self-controlled valves into digital signals and transmit them to the driving device 190 to control the opening and closing of the self-controlled valves.

[0063] During operation, the pressure sensor 170 monitors the dynamic pressure P1 upstream of the intake pipe 120 and transmits it to the control system 180 in real time. The control system 180 calculates the pressure unevenness in real time through the data processing unit. The maximum pressure unevenness value per hour is then 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 them to the drive device 190 to control the opening and closing of the automatic control valves.

[0064] Specifically, under gas phase conditions, when the pressure unevenness is greater than a specified value, the control system 180 controls the first automatic control valve 121 to open, and the second automatic control valve 141 and the third automatic control valve 161 to close, so that the gas phase fluid enters the attenuation device 110 through the intake pipe 120 and then flows into the mixing tube 150; when the pressure unevenness is less than a specified value, the control system 180 controls the third automatic control valve 161 to open, and the first automatic control valve 121 and the second automatic control valve 141 to close, so that the gas phase fluid flows into the mixing tube 150 through the connecting pipe 160.

[0065] Under the gas-liquid two-phase working condition, the control system 180 controls the first automatic valve 121 and the second automatic valve 141 to open, and the third automatic valve 161 to close, so that the gas phase fluid enters the attenuation device 110 through the air inlet pipe 120, and the liquid phase fluid enters the attenuation device 110 through the liquid inlet pipe 140 and mixes with the gas phase fluid before flowing into the mixing tube 150.

[0066] Through the above technical solution, the pipeline system 100 of the present invention can not only attenuate the gas flow pulsation under gas phase conditions, but also effectively attenuate the pressure pulsation under gas-liquid two-phase conditions without causing a large pressure loss.

[0067] A third aspect of the present invention provides a reciprocating device, comprising the above-mentioned pipeline system 100.

[0068] The reciprocating device of the present invention may be a compressor unit, or other reciprocating devices such as a large mixed-transfer pump with alternating gas-liquid two-phase and gaseous single-phase operating conditions.

[0069] The reciprocating device of the present invention can significantly attenuate the fluid pulsation in the pipeline and ensure the safe and stable operation of the device by applying the attenuation device 110, especially installing the attenuation device at the T-tube where the gas and liquid phases meet.

[0070] Compared with the current development of compressors and pulsation attenuation technology, the reciprocating device provided by the present invention applies the principles of cross-jet liquid atomization and porous acoustic airflow pulsation attenuation, and can switch whether to use the attenuation device by controlling the opening and closing of the automatic control valve. Under single-phase conditions, when the upstream pressure unevenness is less than the limit value, the production line avoids the attenuation device 110 to avoid invalid pressure drop energy consumption; when the upstream pressure unevenness is greater than the limit value, the gas phase fluid flows through the attenuation device 110 to suppress excessive pressure pulsation. Under two-phase conditions, the pressure pulsation at the confluence pipeline seriously exceeds the standard range. The attenuation device 110 is incorporated into the production line to achieve effective attenuation of the pressure pulsation at the gas-liquid two-phase confluence pipeline, improve the working reliability of the compressor unit under two-phase conditions, improve the operating environment of the compressor, and will not cause pressure drop energy consumption under single-phase conditions.

[0071] A fourth aspect of the present invention provides a method for attenuating pressure pulsations in a gas-liquid two-phase flow tube, the method comprising: first breaking up the liquid phase fluid from a liquid column into liquid droplets, and then fully mixing the droplets with the gas phase fluid.

[0072] The above method can be implemented by using the device for attenuating fluid pressure pulsation in a pipe provided by the first aspect of the present invention or the pipeline system provided by the second aspect of the present invention.

[0073] Combination Figure 1Specifically, the method may include: under gas phase conditions, when the pressure unevenness is greater than a limited value, the control system 180 controls the first automatic control valve 121 to open, and the second automatic control valve 141 and the third automatic control valve 161 to close, so that the gas phase fluid enters the attenuation device 110 through the intake pipe 120 and then flows into the mixing tube 150; when the pressure unevenness is less than the limited value, the control system 180 controls the third automatic control valve 161 to open, and the first automatic control valve 121 and the second automatic control valve 141 to close, so that the gas phase fluid flows into the mixing tube 150 through the connecting pipe 160; under gas-liquid two-phase conditions, the control system 180 controls the first automatic control valve 121 and the second automatic control valve 141 to open, and the third automatic control valve 161 to close, so that the gas phase fluid enters the attenuation device 110 through the intake pipe 120, and the liquid phase fluid enters the attenuation device 110 through the liquid inlet pipe 140 and mixes with the gas phase fluid before flowing into the mixing tube 150.

[0074] The present invention can not only attenuate the gas flow pulsation under gas phase conditions, but also effectively attenuate the pressure pulsation under gas-liquid two-phase conditions without causing large resistance losses. Figure 5 As shown in the pressure pulsation comparison diagram, after the attenuation device is installed, the pressure unevenness is reduced from 13.3% to 10.0%. The attenuation device of the present invention can effectively attenuate pressure pulsation.

[0075] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0076] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A device for attenuating pressure pulsation of fluid in a pipe, characterized in that: The attenuation device (110) comprises a cylinder (111), a porous baffle (112) and a perforated tube (115); the porous baffle (112) is transversely disposed in the cylinder cavity of the cylinder (111) and divides the cylinder cavity into a first chamber (113) and a second chamber (114) along the axial direction; an air inlet connected to the first chamber (113) and a fluid outlet connected to the second chamber (114) are respectively provided on the two end walls of the cylinder (111); the perforated tube (115) is located in the first chamber (113) and one end of the perforated tube (115) is coaxially plugged with the air inlet; a liquid inlet connected to the first chamber (113) is provided on the peripheral wall of the cylinder (111); a porous angular nozzle (130) is provided at the liquid inlet.

2. The device for attenuating pressure pulsation of fluid in a pipe according to claim 1, characterized in that: The volume of the first chamber (113) is greater than the volume of the second chamber (114), and / or the porous baffle (112) is a concave plate that is concave toward the second chamber (114).

3. The device for attenuating pressure pulsation of fluid in a pipe 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 to 6 times the inner diameter of the perforated tube (115), and / or the length of the cylinder (111) is 3 to 4 times the inner diameter of the cylinder (111).

4. The device for attenuating pressure pulsation of fluid in a pipe according to claim 1, characterized in that: The diameter of the holes on the perforated tube (115) is 1 / 8 to 1 / 4 of the inner diameter of the perforated tube (115), and / or the spacing between the holes on the perforated tube (115) is 1 / 5 to 1 / 3 of the inner diameter of the perforated tube (115).

5. The device for attenuating pressure pulsation of fluid in a pipe according to any one of claims 1 to 4, characterized in that: The axial direction of the liquid inlet is perpendicular to the axial direction of the gas inlet, and / or The central axes of the air inlet and the fluid outlet are collinear with the central axis of the barrel cavity.

6. A pipeline system, characterized in that: The pipeline system (100) includes an air inlet pipe (120), a liquid inlet pipe (140), a mixing tube (150), and an in-tube fluid pressure pulsation attenuation device as described in any one of claims 1 to 5, wherein the air inlet pipe (120) is coaxially connected to the perforated tube (115), the liquid inlet pipe (140) is coaxially inserted at the liquid inlet, and the mixing tube (150) is coaxially inserted at the fluid outlet.

7. The pipeline system according to claim 6, characterized in that: The pipeline system (100) further comprises a connecting pipe (160), wherein the air inlet pipe (120), the liquid inlet pipe (140) and the connecting 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 thereof; one end of the connecting pipe (160) is connected to the air inlet pipe (120) upstream of the first automatic control valve (121), and the other end of the connecting pipe (160) is connected to the mixing pipe (150).

8. The pipeline system according to claim 7, characterized in that: The pipeline system (100) further comprises a pressure sensor (170) and a control system (180); the pressure sensor (170) is arranged upstream of the intake pipe (120) to monitor the dynamic pressure upstream of the intake pipe (120); and the control system (180) is arranged to receive the dynamic pressure and control the opening and closing of each automatic control valve according to the dynamic pressure.

9. The pipeline system according to claim 8, characterized in that: The control system (180) comprises a data processing unit and a programmable logic controller, wherein the data processing unit is used to calculate the pressure unevenness according to the dynamic pressure, and transmit the maximum pressure unevenness value within a predetermined time period to the programmable logic controller, so that the programmable logic controller controls the opening and closing of each automatic control valve; and / or The pipeline system (100) further comprises a driving device (190), and the control system (180) controls the opening and closing of each automatic control valve through the driving device (190).

10. The pipeline system according to claim 9, characterized in that: The control system (180) is configured as follows: In a gas phase working condition, when the pressure unevenness is greater than a limit value, the control system (180) controls the first automatic control valve (121) to open, and the second automatic control valve (141) and the third automatic control valve (161) to close, so that the gas phase fluid enters the attenuation device (110) through the intake pipe (120) and then flows into the mixing pipe (150); when the pressure unevenness is less than a limit value, the control system (180) controls the third automatic control valve (161) to open, and the first automatic control valve (121) and the second automatic control valve (141) to close, so that the gas phase fluid flows into the mixing pipe (150) through the connecting 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 open, and the third automatic control valve (161) to close, so that the gas phase fluid enters the attenuation device (110) through the air inlet pipe (120), and the liquid phase fluid enters the attenuation device (110) through the liquid inlet pipe (140) and mixes with the gas phase fluid before flowing into the mixing pipe (150).

11. A reciprocating device, characterized in that: A piping system comprising any one of claims 6-10.

12. A method for attenuating pressure pulsation in a gas-liquid two-phase flow pipe, characterized in that: The method comprises: firstly breaking up the liquid phase fluid from the liquid column into liquid droplets, and then fully mixing with the gas phase fluid.

13. The method for attenuating pressure pulsation in a gas-liquid two-phase flow pipe according to claim 12, characterized in that: The method is implemented by using the in-pipe fluid pressure pulsation attenuation device described in any one of claims 1-5 or the pipeline system described in any one of claims 6-10.

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