Vibration reduction system for inlet and outlet pipelines of plunger pump

Abstract

The embodiment of the invention discloses a vibration reduction system for inlet and outlet pipelines of a plunger pump, and belongs to the technical field of oilfield water injection development. The system comprises a plunger pump, a first pressure stabilizer, a second pressure stabilizer and a damping device, one end of the plunger pump is connected with an inlet pipeline, and the other end is connected with an outlet pipeline; wherein the first pressure stabilizer is arranged on the inlet pipeline, and the second pressure stabilizer and the damping device are arranged on the outlet pipeline. The system reduces the vibration of the inlet and outlet pipeline of the plunger pump, prolongs the repair-free period of the inlet and outlet pipeline of the plunger pump, and increases the injection time rate of the plunger pump.

Description

Technical Field

[0001] The present application relates to the technical field of oilfield water injection development, and in particular to a vibration reduction system for an inlet and outlet pipeline of a plunger pump. Background Art

[0002] Plunger pumps are widely used in the field of oilfield water injection development technology. However, due to high discharge pressure and harsh working conditions, the inlet and outlet pipelines of the plunger pumps are prone to large vibrations, which in turn causes repeated cracking of the pipeline welds, reduces the operating efficiency of the plunger pumps, and affects the progress of oilfield water injection development.

[0003] In the related technology, a pressure stabilizer is usually added to the inlet and outlet pipelines of the plunger pump. There is an airbag inside the pressure stabilizer. When the pressure increases, the airbag is squeezed and contracts; when the pressure decreases, the airbag expands to supplement the pressure, thereby stabilizing the pressure and reducing the vibration of the inlet and outlet pipelines of the plunger pump.

[0004] However, the inner cavity volume of the stabilizer in the related technology is small and the airbag is prone to aging and leakage, resulting in poor vibration reduction effect of the inlet and outlet pipelines of the plunger pump, which in turn leads to a short maintenance-free period and high maintenance cost of the inlet and outlet pipelines of the plunger pump, which seriously affects the injection time rate of the plunger pump. Summary of the invention

[0005] In view of this, the present application provides a vibration reduction system for the inlet and outlet pipelines of a plunger pump, which can effectively reduce the vibration of the inlet and outlet pipelines of the plunger pump and increase the injection time rate of the plunger pump.

[0006] Specifically, the following technical solutions are included:

[0007] The embodiment of the present application provides a vibration reduction system for an inlet and outlet pipeline of a plunger pump, the system comprising: a plunger pump, a first pressure stabilizer, a second pressure stabilizer and a vibration reduction device;

[0008] One end of the plunger pump is connected to an inlet pipeline, and the other end is connected to an outlet pipeline;

[0009] Wherein, the first pressure stabilizer is arranged on the inlet pipeline, and the second pressure stabilizer and the vibration reduction device are arranged on the outlet pipeline.

[0010] In some embodiments, the first pressure regulator includes a first tank, a liquid level detection component, an air supply component, and a vent valve;

[0011] The liquid level detection component is arranged inside the first tank body;

[0012] The air supply assembly and the venting valve are both arranged outside the first tank body and communicated with the interior of the first tank body.

[0013] In some embodiments, the air supply assembly is arranged at a height higher than the liquid level upper limit of the liquid level detection component, and the vent valve is arranged at a height lower than the liquid level lower limit of the liquid level detection component.

[0014] In some embodiments, the gas supplement component includes a gas supplement component and a connecting pipeline;

[0015] The air supply component is communicated with the interior of the first tank through the communication pipeline.

[0016] In some embodiments, along the direction from the first tank to the gas supplement component, the communication pipeline is provided with a first valve, a pressure relief mechanism, and a second valve in sequence;

[0017] Wherein, the height of the pressure relief mechanism is lower than the height of the first valve and the height of the second valve.

[0018] In some embodiments, the pressure relief mechanism includes a third valve, a diversion pipeline, and a liquid sensor;

[0019] One end of the diversion pipeline is connected to the first valve, and the other end is connected to the second valve;

[0020] The third valve is arranged on the flow guiding pipeline, and the liquid sensor is arranged in the flow guiding pipeline.

[0021] In some embodiments, the first voltage regulator further comprises an automatic control mechanism;

[0022] The automatic control mechanism is respectively connected with the liquid sensor, the air supply component, the first valve, the second valve and the third valve by signal.

[0023] In some embodiments, the second pressure regulator includes a second tank, a first pressure reducing pipeline, and a second pressure reducing pipeline;

[0024] The first pressure-reducing pipeline and the second pressure-reducing pipeline are arranged on two sides of the second tank body, and are both communicated with the interior of the second tank body.

[0025] In some embodiments, the first decompression pipeline includes a first decompression sub-pipeline and a second decompression sub-pipeline, the second decompression sub-pipeline is located inside the second tank body; one end of the first decompression sub-pipeline passes through the side wall of the second tank body and is connected to the second decompression sub-pipeline; the extension direction of the first decompression sub-pipeline and the extension direction of the second decompression sub-pipeline form a preset angle;

[0026] The second pressure-reducing sub-pipeline includes a third pressure-reducing sub-pipeline and a fourth pressure-reducing sub-pipeline, the fourth pressure-reducing sub-pipeline is located inside the second tank body; one end of the third pressure-reducing sub-pipeline passes through the side wall of the second tank body and is connected to the fourth pressure-reducing sub-pipeline; an extension direction of the third pressure-reducing sub-pipeline and an extension direction of the fourth pressure-reducing sub-pipeline form a preset angle.

[0027] In some embodiments, the vibration reduction device includes a first accumulator, a second accumulator, and a connecting member;

[0028] The first accumulator and the second accumulator are both connected to the connecting member and are arranged oppositely on two sides of the connecting member;

[0029] The connecting member is a tube body, and is provided with a first through hole and a second through hole. The first accumulator is connected to the interior of the connecting member through the first through hole, and the second accumulator is connected to the interior of the connecting member through the second through hole. A plurality of arc-shaped protrusions are arranged on the inner wall of the connecting member.

[0030] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0031] The vibration reduction system for the inlet and outlet pipelines of the plunger pump provided in the embodiment of the present application reduces the vibration of the inlet pipeline of the plunger pump by setting a first pressure stabilizer on the inlet pipeline of the plunger pump; and reduces the vibration of the outlet pipeline of the plunger pump by installing a second pressure stabilizer and a vibration reduction device on the outlet pipeline of the plunger pump. The system greatly reduces the vibration of the inlet and outlet pipelines of the plunger pump through the triple vibration reduction design of the first pressure stabilizer, the second pressure stabilizer and the vibration reduction device, extends the maintenance-free period of the inlet and outlet pipelines of the plunger pump, reduces maintenance costs, and increases the injection rate of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic diagram of the structure of a vibration reduction system for an inlet and outlet pipeline of a plunger pump provided in an embodiment of the present application;

[0034] Figure 2 A schematic structural diagram of a first voltage stabilizer in a vibration reduction system for an inlet and outlet pipeline of a plunger pump provided in an embodiment of the present application;

[0035] Figure 3A schematic diagram of the structure of a second voltage stabilizer in a vibration reduction system for an inlet and outlet pipeline of a plunger pump provided in an embodiment of the present application;

[0036] Figure 4 A schematic structural diagram of a vibration reduction device in a vibration reduction system for an inlet and outlet pipeline of a plunger pump provided in an embodiment of the present application.

[0037] The reference numerals in the figures represent respectively:

[0038] 1- plunger pump;

[0039] 2-first stabilizer; 21-first tank; 22-liquid level detection component; 23-air supply component; 231-air supply component; 232-connecting pipeline; first valve-2321; pressure relief mechanism-2322; 23221-third valve; 23222-flow guide pipeline; 23223-liquid sensor; second valve-2323; 24-vent valve; 25-automatic control mechanism;

[0040] 3-second pressure stabilizer; 31-second tank; 32-first pressure reducing pipeline; 321-first pressure reducing sub-pipeline; 322-second pressure reducing sub-pipeline; 33-second pressure reducing pipeline; 331-third pressure reducing sub-pipeline; 332-fourth pressure reducing sub-pipeline;

[0041] 4-vibration reduction device; 41-first accumulator; 42-second accumulator; 43-connecting member, 431-first through hole, 432-second through hole, 433-arc-shaped protrusion;

[0042] 5- Import pipeline;

[0043] 6-Export pipeline;

[0044] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the embodiments of the present application.

[0048] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by those of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are explained below.

[0049] In the process of oilfield development, oilfield water injection development is an important measure to supplement formation pressure and improve crude oil recovery. Plunger pumps are widely used in the field of oilfield water injection development technology, but due to the high pressure of the plunger pump to discharge the liquid and the harsh working conditions, the inlet and outlet pipelines of the plunger pump are prone to large vibration problems, causing the pipeline welds to crack repeatedly. Once the pipeline welds of the inlet and outlet pipelines of the plunger pump crack, the pump needs to be stopped for leak repair and maintenance, which reduces the injection time of the plunger pump water injection and reduces the operating efficiency of the plunger pump, which seriously affects the progress of oilfield water injection development.

[0050] In the related art, through on-site detection and analysis, it was found that the main reason for the vibration of the plunger pump is that during the operation of the plunger pump, the suction and discharge of the liquid flow generates pressure pulses due to the periodic changes in pressure and flow, which makes the pressure of the inlet and outlet pipelines unstable and causes the vibration of the inlet and outlet pipelines. For this reason, relevant personnel usually add a stabilizer to the inlet and outlet pipelines of the plunger pump. There is an airbag inside the stabilizer. When the pressure increases, the airbag is squeezed and shrinks; when the pressure decreases, the airbag expands to supplement the pressure, thereby stabilizing the pressure and reducing the vibration of the inlet and outlet pipelines of the plunger pump. However, the inner cavity volume of the stabilizer in the related art is small, and the airbag is prone to aging and leakage, resulting in poor vibration reduction effect of the inlet and outlet pipelines of the plunger pump, which in turn leads to a short maintenance-free period and high maintenance cost of the inlet and outlet pipelines of the plunger pump, which seriously affects the injection time rate of the plunger pump.

[0051] In order to solve the technical problems existing in the related technology, the embodiment of the present application provides a vibration reduction system for the inlet and outlet pipelines of the plunger pump, which can reduce the vibration of the inlet and outlet pipelines of the plunger pump, extend the maintenance-free period of the inlet and outlet pipelines of the plunger pump, and increase the injection time rate of the plunger pump.

[0052] Figure 1 This is a schematic diagram of the structure of a vibration reduction system for the inlet and outlet pipelines of a plunger pump provided in an embodiment of the present application. Figure 1 The vibration reduction system of the inlet and outlet pipelines of the plunger pump includes: a plunger pump 1, a first pressure stabilizer 2, a second pressure stabilizer 3 and a vibration reduction device 4.

[0053] One end of the plunger pump 1 is connected to an inlet pipeline 5, and the other end is connected to an outlet pipeline 6;

[0054] The inlet pipeline 5 is provided with a first pressure stabilizer 2 , and the outlet pipeline 6 is provided with a second pressure stabilizer 3 and a vibration reduction device 4 .

[0055] See also Figure 1 , the inlet pipeline 5 and the outlet pipeline 6 have the same size, and the axis of the inlet pipeline 5 and the axis of the outlet pipeline 6 are located on the same straight line.

[0056] Therefore, the vibration reduction system for the inlet and outlet pipelines of the plunger pump provided in the embodiment of the present application reduces the vibration of the inlet pipeline of the plunger pump by setting the first pressure stabilizer 2 on the inlet pipeline 5 of the plunger pump 1; and further reduces the vibration of the outlet pipeline of the plunger pump by installing the second pressure stabilizer 3 and the vibration reduction device 4 on the outlet pipeline 6 of the plunger pump 1. The system greatly reduces the vibration of the inlet and outlet pipelines of the plunger pump through the triple vibration reduction design of the first pressure stabilizer 2, the second pressure stabilizer 3 and the vibration reduction device 4, extends the maintenance-free period of the inlet and outlet pipelines of the plunger pump, reduces the maintenance cost, and increases the injection time rate of the plunger pump.

[0057] The structure of the vibration reduction system of the inlet and outlet pipelines of the plunger pump provided in the embodiment of the present application is further described below:

[0058] Figure 2 This is a schematic diagram of the structure of the first voltage stabilizer in the vibration reduction system of the inlet and outlet pipelines of a plunger pump provided in an embodiment of the present application. Figure 2 In some embodiments, the first pressure stabilizer 2 includes a first tank body 21 , a liquid level detection component 22 , an air supply component 23 and a vent valve 24 .

[0059] The liquid level detection component 22 is arranged inside the first tank body 21 ; the air supply component 23 and the vent valve 24 are both arranged outside the first tank body 21 and communicated with the inside of the first tank body 21 .

[0060] By setting the liquid level detection component 22 inside the first tank body 21, the liquid level inside the first tank body 21 can be measured; by setting the gas replenishing component 23, it is used to fill the first tank body 21 with gas; by setting the vent valve 24, it is used to vent the liquid inside the first tank body 21.

[0061] In some embodiments, the air supply component 23 is set at a height higher than the liquid level upper limit of the liquid level detection component 22 , and the vent valve 24 is set at a height lower than the liquid level lower limit of the liquid level detection component 22 .

[0062] By setting the air-infusing component 23 at a position higher than the upper limit of the liquid level of the liquid level detecting component 22, it is prevented that the liquid flows into the air-infusing component when the liquid level has not yet reached the upper limit of the liquid level set by the liquid level detecting component; by setting the vent valve 24 at a position lower than the lower limit of the liquid level of the liquid level detecting component 22, it is convenient to discharge the liquid inside the first tank body 21 when the pump is reversed or stopped.

[0063] In some embodiments, the air supply component 23 is set at a height lower than the top of the first tank body 21 to prevent the air supply component 23 from leaking or the liquid level rising too quickly, causing the liquid to fill the internal space of the first tank body 21, thereby avoiding failure of the pressure stabilizing effect of the first regulator 2.

[0064] In some embodiments, see Figure 3 The air supply assembly 23 includes an air supply component 231 and a connecting pipe 232 , and the air supply component 231 is connected to the interior of the first tank body 21 through the connecting pipe 232 .

[0065] The air replenishing component 231 fills gas into the interior of the first tank body 21 through the connecting pipe 232, forming an air space similar to an airbag above the liquid level inside the first tank body 21 to store and release energy, offset the pulse impact caused by the inlet liquid flow pressure, and reduce the vibration amplitude of the plunger pump inlet pipeline.

[0066] In some embodiments, see Figure 3 In the direction from the first tank body 21 to the air supply component 231 , a first valve 2321 , a pressure relief mechanism 2322 and a second valve 2323 are sequentially arranged on the connecting pipeline 232 .

[0067] The height of the pressure relief mechanism 2322 is lower than the height of the first valve 2321 and the height of the second valve 2323 .

[0068] During actual operation, the plunger pump inlet pressure sometimes suddenly increases. At this time, the liquid level inside the first tank body 21 will rise rapidly and exceed the upper limit of the liquid level detection component. In order to prevent the first tank body 21 from losing its pressure stabilizing effect due to being filled with liquid, the pressure relief mechanism 2322 needs to be set at a height lower than the first valve 2321 and the second valve 2323, so that the connecting pipe 232 at both ends of the pressure relief mechanism 2322 forms a U-shaped pipe structure, which can accommodate more overflowed liquid and further prevent the overflowed liquid from entering the air replenishing component 231.

[0069] In some embodiments, see Figure 3 The pressure relief mechanism 2322 includes: a third valve 23221 , a flow guide pipeline 23222 and a liquid sensor 23223 .

[0070] One end of the diversion pipeline 23222 is connected to the first valve 2321 , and the other end is connected to the second valve 2323 ; the third valve 23221 is arranged on the diversion pipeline 23222 , and the liquid sensor 23223 is arranged in the diversion pipeline 23222 .

[0071] A liquid sensor 23223 is provided to detect whether liquid flows through the guide pipe 23222. When liquid flows into the guide pipe 23222, the third valve 23221 is opened to allow the liquid to flow out of the guide pipe 23222, so as to avoid failure of the air replenishing component 231 due to water ingress.

[0072] In some embodiments, see Figure 3 The first voltage stabilizer 2 also includes a self-control mechanism 25.

[0073] The automatic control mechanism 25 is signal-connected to the liquid sensor 23223 , the air supply component 231 , the first valve 2321 , the second valve 2323 and the third valve 23221 , respectively.

[0074] That is to say, the automatic control mechanism 25 can receive data sent from the liquid level detection component 22 and the air supply component 23, and can also send instructions to the liquid level detection component 22 and the air supply component 23 to control the operation of the liquid level detection component 22 and the air supply component 23; at the same time, the automatic control mechanism 25 can control the opening and closing of the first valve 2321, the second valve 2323 and the third valve 23221.

[0075] Specifically, the liquid level detection component 22 measures the liquid surface height in real time and sends the measurement result to the automatic control mechanism 25. When the liquid pressure increases, causing the liquid surface height to rise and exceed the upper limit of the liquid level detection component 22, the automatic control mechanism 25 receives data from the liquid level detection component 22, controls the first valve 2321 and the second valve 2323 to open, and controls the air supply component 231 to start, and fills gas into the first tank body 21 through the connecting pipe 232 until the liquid surface height is lowered by the gas; when the liquid surface height decreases and reaches the lower limit of the liquid level detection component, the automatic control mechanism 25 receives data from the liquid level detection component 22, controls the first valve 2321 and the second valve 2323 to close, and controls the air supply component 231 to close, so as to restore the liquid surface height. When the liquid pressure at the inlet of the plunger pump suddenly increases, causing the liquid level to rise rapidly to the position of the air replenishing component 23, the liquid will flow into the connecting pipe 232 and flow through the liquid sensor 23223. The liquid sensor 23223 transmits data to the automatic control mechanism 25. The automatic control mechanism 25 controls the third valve 23221 to open and controls the first valve 2321 to close.

[0076] In some embodiments, the self-control mechanism 25 is also connected to the remote central control system signal so as to send an alarm indication to the central control system when receiving data from the liquid sensor 23223.

[0077] It is understandable that when liquid enters the air supply assembly 23, relevant personnel need to perform on-site operations to eliminate the fault.

[0078] In some embodiments, the volume of the internal hollow space of the first tank body 21 can be FS (the product of the plunger diameter and the stroke), see Table 1. For example, for a plunger pump with a plunger diameter of 75 mm or 80 mm and a stroke length of 180 mm, the volume of the internal hollow space of the first tank body 21 ranges from 2.38 to 3.62 L.

[0079] Table 1 Calculation table of the volume range of the air chamber at the inlet end of the plunger pump

[0080]

[0081] In the process of designing the volume of the first tank body 21, it is also necessary to consider the compressibility of the air volume and the water solubility of components such as oxygen and carbon dioxide. For example, the volume of the first tank body 21 can be designed to be 18L.

[0082] Figure 3 This is a schematic diagram of the structure of the second voltage stabilizer in the vibration reduction system of the inlet and outlet pipelines of a plunger pump provided in an embodiment of the present application. Figure 3 In some embodiments, the second pressure stabilizer 3 includes a second tank 31 , a first pressure reducing pipeline 32 and a second pressure reducing pipeline 33 .

[0083] The first pressure reducing pipeline 32 and the second pressure reducing pipeline 33 are disposed on two sides of the second tank body 31 , and are both connected to the interior of the second tank body 31 .

[0084] When liquid flows in, the liquid may enter from the first decompression pipeline 32 , pass through the interior of the second tank body 31 , and flow out from the second decompression pipeline 33 .

[0085] See also Figure 3 The extension direction of the first decompression pipeline 32 is parallel to the extension direction of the second decompression pipeline 33, and the extension direction of the first decompression pipeline 32 is parallel to; the second tank body 31 can be a spherical tank body, and the spherical tank body can form a spherical cavity.

[0086] In some embodiments, see Figure 3 The first pressure-reducing sub-pipeline 32 includes a first pressure-reducing sub-pipeline 321 and a second pressure-reducing sub-pipeline 322, and the second pressure-reducing sub-pipeline 322 is located inside the second tank body 31; one end of the first pressure-reducing sub-pipeline 321 passes through the side wall of the second tank body 31 and is connected to the second pressure-reducing sub-pipeline 322; the extension direction of the first pressure-reducing sub-pipeline 321 and the extension direction of the second pressure-reducing sub-pipeline 322 form a preset angle;

[0087] The second pressure-reducing sub-pipeline 333 includes a third pressure-reducing sub-pipeline 331 and a fourth pressure-reducing sub-pipeline 332. The fourth pressure-reducing sub-pipeline 332 is located inside the second tank body 31. One end of the third pressure-reducing sub-pipeline 331 passes through the side wall of the second tank body 31 and is connected to the fourth pressure-reducing sub-pipeline 332. The extension direction of the third pressure-reducing sub-pipeline 331 and the extension direction of the fourth pressure-reducing sub-pipeline 332 form a preset angle.

[0088] See also Figure 3 When the liquid flows from the second pressure-reducing sub-pipeline 322 to the first pressure-reducing sub-pipeline 321, when the liquid flows into the second pressure-reducing sub-pipeline 322, since the extension direction of the third pressure-reducing sub-pipeline 331 and the extension direction of the fourth pressure-reducing sub-pipeline 332 are at a preset angle, the flow direction of the liquid changes, and a portion of the liquid flow pressure pulsation impact is offset for the first time; after the liquid enters the second tank body 31, the liquid changes the volume in the cavity of the second tube body 31, and a portion of the liquid flow pressure pulsation impact is offset for the second time; when the liquid flows into the first pressure-reducing sub-pipeline 321, since the liquid collides with the tube wall when it flows into the first pressure-reducing sub-pipeline 321 and the extension direction of the first pressure-reducing sub-pipeline 321 and the extension direction of the second pressure-reducing sub-pipeline 322 are at a preset angle, the flow direction of the liquid changes, and a portion of the liquid flow pressure pulsation impact is offset for the third and fourth times. Therefore, the second pressure stabilizer 3 has the effect of reducing vibration of the plunger pump outlet pipeline 6, thereby extending the maintenance-free period of the plunger pump outlet pipeline 6, reducing maintenance costs, and increasing the injection time rate of the plunger pump.

[0089] Optionally, the preset angle may be 90°.

[0090] It should be noted that the second stabilizer is a mechanical damping device. 3 / h, and the plunger pump with an outlet pressure of about 15MPa is more effective, but for the plunger pump with larger displacement and higher pressure, relying solely on the mechanical vibration reduction method such as the second stabilizer is not enough to achieve a satisfactory vibration reduction effect. Therefore, the vibration reduction system of the plunger pump inlet and outlet pipelines provided in the embodiment of the present application also adds a vibration reduction device on the outlet pipeline 6 of the plunger pump, thereby forming a composite vibration reduction design combining the vibration reduction device 4 with the second stabilizer 3.

[0091] Figure 4 A schematic diagram of the structure of a vibration reduction device in a vibration reduction system for an inlet and outlet pipeline of a plunger pump provided in an embodiment of the present application. In some embodiments, see Figure 4 The vibration reduction device 4 includes a first energy accumulator 41 , a second energy accumulator 42 and a connecting member 43 .

[0092] Among them, the first accumulator 41 and the second accumulator 42 are both connected to the connecting member 43 and are relatively arranged on both sides of the connecting member 43; the connecting member 43 is a tube body, and the connecting member 43 is provided with a first through hole 431 and a second through hole 432. The first accumulator 41 is connected to the interior of the connecting member 43 through the first through hole 431, and the second accumulator 42 is connected to the interior of the connecting member 43 through the second through hole 432. A plurality of arc-shaped protrusions 433 are arranged on the inner wall of the connecting member 43.

[0093] By providing a plurality of protrusions on the inner wall of the connector 43, the flow direction of the liquid can be changed when the liquid flows through the connector 43, thereby further reducing the impact of the pulsation of the liquid flow pressure, which is beneficial to achieving vibration reduction of the outlet pipeline of the plunger pump.

[0094] In some embodiments, see Figure 4 The number of arc-shaped protrusions 433 can be two, one of which is opposite to the first through hole 431, and the other is opposite to the second through hole 432, and the two arc-shaped protrusions 433 are oppositely arranged on both sides of the inner wall of the connecting member 43, so that the flow channel of the connecting member 43 is formed into an S shape, which can not only play the role of drainage and vibration reduction, but also take into account the purpose of changing the flow direction and vibration reduction. At the same time, by designing a vibration reduction method that is symmetrical up and down, it is possible to balance and offset the up and down impacts formed by the pressure pulsation of the liquid flow, and the vibration reduction effect is better.

[0095] Furthermore, the central angle of the arc-shaped protrusion 433 opposite to the first through hole 431 can be 60 degrees, and the center line of the arc-shaped protrusion 433 points to the first accumulator 41; the central angle of the arc-shaped protrusion 433 opposite to the second through hole 432 can also be 60 degrees, and the center line of the arc-shaped protrusion 433 points to the second accumulator 42.

[0096] See also Figure 4 When the liquid enters the vibration reduction device 4, the liquid flow collides with the arc-shaped protrusion 433 opposite to the first through hole 431 and then changes the flow direction, directing the pressure pulsation of the liquid flow to the first accumulator 41, and the first accumulator 41 offsets part of the pressure pulsation impact of the liquid flow for the first time; the liquid flow passes through the arc-shaped protrusion 433 opposite to the second through hole 432 again and then changes the flow direction again, directing the pressure pulsation of the liquid flow to the second accumulator 42, and the second accumulator 42 offsets part of the pressure pulsation impact of the liquid flow for the second time, thereby reducing the pressure pulsation impact of the liquid flow, which is beneficial to achieve vibration reduction of the outlet pipeline of the plunger pump.

[0097] In some embodiments, the first accumulator 41 and the second accumulator 42 may be nitrogen accumulators.

[0098] The nitrogen accumulator stores and releases energy by shrinking and expanding the nitrogen bladder.

[0099] It should be noted that the embodiment of the present application can also select a nitrogen accumulator with suitable parameters according to the displacement of the plunger pump and the size of the outlet liquid pressure, and has a wide range of applications.

[0100] In some embodiments, the nitrogen accumulator is designed to be flange-connected and steel-ring-sealed, the nitrogen accumulator and the flange are fastened with threads, and the connection is fixed by secondary sealing through welding.

[0101] This design facilitates the maintenance and replacement of the nitrogen accumulator, reduces the risk of leakage, and improves the safety and service life of the vibration reduction device 4.

[0102] In actual use, before starting the plunger pump 1, it is necessary to check whether the performance of the plunger pump 1, the first regulator 2, the second regulator 3, the vibration reduction device 4, the inlet pipeline 5 and the outlet pipeline 6 are normal to avoid safety accidents.

[0103] In the description of the embodiments of the present application, it should be noted that, 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 a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0105] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0106] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A vibration reduction system for the inlet and outlet pipelines of a plunger pump, characterized in that: The system comprises: a plunger pump (1), a first pressure stabilizer (2), a second pressure stabilizer (3) and a vibration reduction device (4); One end of the plunger pump (1) is connected to an inlet pipeline (5), and the other end is connected to an outlet pipeline (6); The first pressure stabilizer (2) is arranged on the inlet pipeline (5), and the second pressure stabilizer (3) and the vibration reduction device (4) are arranged on the outlet pipeline (6).

2. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 1, characterized in that: The first pressure stabilizer (2) comprises a first tank body (21), a liquid level detection component (22), an air supply component (23) and a venting valve (24); The liquid level detection element (22) is arranged inside the first tank body (21); The air supply assembly (23) and the venting valve (24) are both arranged outside the first tank body (21) and are in communication with the interior of the first tank body (21).

3. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 2, characterized in that: The setting height of the air supply component (23) is higher than the height of the upper limit of the liquid level of the liquid level detection component (22), and the setting height of the vent valve (24) is lower than the height of the lower limit of the liquid level of the liquid level detection component (22).

4. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 2, characterized in that: The air supply assembly (23) comprises an air supply component (231) and a connecting pipeline (232); The air supply component (231) is connected to the interior of the first tank (21) via the connecting pipe (232).

5. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 4, characterized in that: In the direction from the first tank body (21) to the air supply component (231), the connecting pipeline (232) is provided with a first valve (2321), a pressure relief mechanism (2322) and a second valve (2323) in sequence; Wherein, the height of the pressure relief mechanism (2322) is lower than the height of the first valve (2321) and the height of the second valve (2323).

6. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 5, characterized in that: The pressure relief mechanism (2322) includes a third valve (23221), a flow guide pipeline (23222) and a liquid sensor (23223); One end of the diversion pipeline (23222) is connected to the first valve (2321), and the other end is connected to the second valve (2323); The third valve (23221) is arranged on the flow guiding pipeline (23222), and the liquid sensor (23223) is arranged in the flow guiding pipeline (23222).

7. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 6, characterized in that: The first voltage stabilizer (2) further comprises an automatic control mechanism (25); The automatic control mechanism (25) is respectively connected to the liquid sensor (23223), the air supply component (231), the first valve (2321), the second valve (2323) and the third valve (23221) via signals.

8. The vibration reduction system for the inlet and outlet pipelines of a plunger pump according to claim 1, characterized in that: The second pressure stabilizer (3) comprises a second tank (31), a first pressure reducing pipeline (32) and a second pressure reducing pipeline (33); The first pressure-reducing pipeline (32) and the second pressure-reducing pipeline (33) are arranged on two sides of the second tank body (31) relative to each other, and are both connected to the interior of the second tank body (31).

9. The vibration reduction system for the inlet and outlet pipelines of the plunger pump according to claim 8, characterized in that: The first pressure-reducing sub-pipeline (322) comprises a first pressure-reducing sub-pipeline (321) and a second pressure-reducing sub-pipeline (322); the second pressure-reducing sub-pipeline (322) is located inside the second tank body (31); one end of the first pressure-reducing sub-pipeline (321) passes through the side wall of the second tank body (31) and is in communication with the second pressure-reducing sub-pipeline (322); an extension direction of the first pressure-reducing sub-pipeline (321) and an extension direction of the second pressure-reducing sub-pipeline (322) form a preset angle; The second pressure-reducing sub-pipeline (33) comprises a third pressure-reducing sub-pipeline (331) and a fourth pressure-reducing sub-pipeline (332); the fourth pressure-reducing sub-pipeline (332) is located inside the second tank body (31); one end of the third pressure-reducing sub-pipeline (331) passes through the side wall of the second tank body (31) and is in communication with the fourth pressure-reducing sub-pipeline (332); an extension direction of the third pressure-reducing sub-pipeline (331) and an extension direction of the fourth pressure-reducing sub-pipeline (332) form a preset angle.

10. The vibration reduction system for the inlet and outlet pipelines of a plunger pump according to claim 1, characterized in that: The vibration reduction device (4) comprises a first energy accumulator (41), a second energy accumulator (42) and a connecting member (43); The first accumulator (41) and the second accumulator (42) are both connected to the connecting member (43) and are arranged oppositely on two sides of the connecting member (43); The connecting piece (43) is a tube body, and is provided with a first through hole (431) and a second through hole (432). The first accumulator (41) is connected to the interior of the connecting piece (43) through the first through hole (431), and the second accumulator (42) is connected to the interior of the connecting piece (43) through the second through hole (432). A plurality of arc-shaped protrusions (433) are provided on the inner wall of the connecting piece (43).

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